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+/**
+ * @license
+ * Video.js 8.12.0 <http://videojs.com/>
+ * Copyright Brightcove, Inc. <https://www.brightcove.com/>
+ * Available under Apache License Version 2.0
+ * <https://github.com/videojs/video.js/blob/main/LICENSE>
+ *
+ * Includes vtt.js <https://github.com/mozilla/vtt.js>
+ * Available under Apache License Version 2.0
+ * <https://github.com/mozilla/vtt.js/blob/main/LICENSE>
+ */
+
+(function (global, factory) {
+ typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
+ typeof define === 'function' && define.amd ? define(factory) :
+ (global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.videojs = factory());
+})(this, (function () { 'use strict';
+
+ var version$5 = "8.12.0";
+
+ /**
+ * An Object that contains lifecycle hooks as keys which point to an array
+ * of functions that are run when a lifecycle is triggered
+ *
+ * @private
+ */
+ const hooks_ = {};
+
+ /**
+ * Get a list of hooks for a specific lifecycle
+ *
+ * @param {string} type
+ * the lifecycle to get hooks from
+ *
+ * @param {Function|Function[]} [fn]
+ * Optionally add a hook (or hooks) to the lifecycle that your are getting.
+ *
+ * @return {Array}
+ * an array of hooks, or an empty array if there are none.
+ */
+ const hooks = function (type, fn) {
+ hooks_[type] = hooks_[type] || [];
+ if (fn) {
+ hooks_[type] = hooks_[type].concat(fn);
+ }
+ return hooks_[type];
+ };
+
+ /**
+ * Add a function hook to a specific videojs lifecycle.
+ *
+ * @param {string} type
+ * the lifecycle to hook the function to.
+ *
+ * @param {Function|Function[]}
+ * The function or array of functions to attach.
+ */
+ const hook = function (type, fn) {
+ hooks(type, fn);
+ };
+
+ /**
+ * Remove a hook from a specific videojs lifecycle.
+ *
+ * @param {string} type
+ * the lifecycle that the function hooked to
+ *
+ * @param {Function} fn
+ * The hooked function to remove
+ *
+ * @return {boolean}
+ * The function that was removed or undef
+ */
+ const removeHook = function (type, fn) {
+ const index = hooks(type).indexOf(fn);
+ if (index <= -1) {
+ return false;
+ }
+ hooks_[type] = hooks_[type].slice();
+ hooks_[type].splice(index, 1);
+ return true;
+ };
+
+ /**
+ * Add a function hook that will only run once to a specific videojs lifecycle.
+ *
+ * @param {string} type
+ * the lifecycle to hook the function to.
+ *
+ * @param {Function|Function[]}
+ * The function or array of functions to attach.
+ */
+ const hookOnce = function (type, fn) {
+ hooks(type, [].concat(fn).map(original => {
+ const wrapper = (...args) => {
+ removeHook(type, wrapper);
+ return original(...args);
+ };
+ return wrapper;
+ }));
+ };
+
+ /**
+ * @file fullscreen-api.js
+ * @module fullscreen-api
+ */
+
+ /**
+ * Store the browser-specific methods for the fullscreen API.
+ *
+ * @type {Object}
+ * @see [Specification]{@link https://fullscreen.spec.whatwg.org}
+ * @see [Map Approach From Screenfull.js]{@link https://github.com/sindresorhus/screenfull.js}
+ */
+ const FullscreenApi = {
+ prefixed: true
+ };
+
+ // browser API methods
+ const apiMap = [['requestFullscreen', 'exitFullscreen', 'fullscreenElement', 'fullscreenEnabled', 'fullscreenchange', 'fullscreenerror', 'fullscreen'],
+ // WebKit
+ ['webkitRequestFullscreen', 'webkitExitFullscreen', 'webkitFullscreenElement', 'webkitFullscreenEnabled', 'webkitfullscreenchange', 'webkitfullscreenerror', '-webkit-full-screen']];
+ const specApi = apiMap[0];
+ let browserApi;
+
+ // determine the supported set of functions
+ for (let i = 0; i < apiMap.length; i++) {
+ // check for exitFullscreen function
+ if (apiMap[i][1] in document) {
+ browserApi = apiMap[i];
+ break;
+ }
+ }
+
+ // map the browser API names to the spec API names
+ if (browserApi) {
+ for (let i = 0; i < browserApi.length; i++) {
+ FullscreenApi[specApi[i]] = browserApi[i];
+ }
+ FullscreenApi.prefixed = browserApi[0] !== specApi[0];
+ }
+
+ /**
+ * @file create-logger.js
+ * @module create-logger
+ */
+
+ // This is the private tracking variable for the logging history.
+ let history = [];
+
+ /**
+ * Log messages to the console and history based on the type of message
+ *
+ * @private
+ * @param {string} name
+ * The name of the console method to use.
+ *
+ * @param {Object} log
+ * The arguments to be passed to the matching console method.
+ *
+ * @param {string} [styles]
+ * styles for name
+ */
+ const LogByTypeFactory = (name, log, styles) => (type, level, args) => {
+ const lvl = log.levels[level];
+ const lvlRegExp = new RegExp(`^(${lvl})$`);
+ let resultName = name;
+ if (type !== 'log') {
+ // Add the type to the front of the message when it's not "log".
+ args.unshift(type.toUpperCase() + ':');
+ }
+ if (styles) {
+ resultName = `%c${name}`;
+ args.unshift(styles);
+ }
+
+ // Add console prefix after adding to history.
+ args.unshift(resultName + ':');
+
+ // Add a clone of the args at this point to history.
+ if (history) {
+ history.push([].concat(args));
+
+ // only store 1000 history entries
+ const splice = history.length - 1000;
+ history.splice(0, splice > 0 ? splice : 0);
+ }
+
+ // If there's no console then don't try to output messages, but they will
+ // still be stored in history.
+ if (!window.console) {
+ return;
+ }
+
+ // Was setting these once outside of this function, but containing them
+ // in the function makes it easier to test cases where console doesn't exist
+ // when the module is executed.
+ let fn = window.console[type];
+ if (!fn && type === 'debug') {
+ // Certain browsers don't have support for console.debug. For those, we
+ // should default to the closest comparable log.
+ fn = window.console.info || window.console.log;
+ }
+
+ // Bail out if there's no console or if this type is not allowed by the
+ // current logging level.
+ if (!fn || !lvl || !lvlRegExp.test(type)) {
+ return;
+ }
+ fn[Array.isArray(args) ? 'apply' : 'call'](window.console, args);
+ };
+ function createLogger$1(name, delimiter = ':', styles = '') {
+ // This is the private tracking variable for logging level.
+ let level = 'info';
+
+ // the curried logByType bound to the specific log and history
+ let logByType;
+
+ /**
+ * Logs plain debug messages. Similar to `console.log`.
+ *
+ * Due to [limitations](https://github.com/jsdoc3/jsdoc/issues/955#issuecomment-313829149)
+ * of our JSDoc template, we cannot properly document this as both a function
+ * and a namespace, so its function signature is documented here.
+ *
+ * #### Arguments
+ * ##### *args
+ * *[]
+ *
+ * Any combination of values that could be passed to `console.log()`.
+ *
+ * #### Return Value
+ *
+ * `undefined`
+ *
+ * @namespace
+ * @param {...*} args
+ * One or more messages or objects that should be logged.
+ */
+ const log = function (...args) {
+ logByType('log', level, args);
+ };
+
+ // This is the logByType helper that the logging methods below use
+ logByType = LogByTypeFactory(name, log, styles);
+
+ /**
+ * Create a new subLogger which chains the old name to the new name.
+ *
+ * For example, doing `videojs.log.createLogger('player')` and then using that logger will log the following:
+ * ```js
+ * mylogger('foo');
+ * // > VIDEOJS: player: foo
+ * ```
+ *
+ * @param {string} subName
+ * The name to add call the new logger
+ * @param {string} [subDelimiter]
+ * Optional delimiter
+ * @param {string} [subStyles]
+ * Optional styles
+ * @return {Object}
+ */
+ log.createLogger = (subName, subDelimiter, subStyles) => {
+ const resultDelimiter = subDelimiter !== undefined ? subDelimiter : delimiter;
+ const resultStyles = subStyles !== undefined ? subStyles : styles;
+ const resultName = `${name} ${resultDelimiter} ${subName}`;
+ return createLogger$1(resultName, resultDelimiter, resultStyles);
+ };
+
+ /**
+ * Create a new logger.
+ *
+ * @param {string} newName
+ * The name for the new logger
+ * @param {string} [newDelimiter]
+ * Optional delimiter
+ * @param {string} [newStyles]
+ * Optional styles
+ * @return {Object}
+ */
+ log.createNewLogger = (newName, newDelimiter, newStyles) => {
+ return createLogger$1(newName, newDelimiter, newStyles);
+ };
+
+ /**
+ * Enumeration of available logging levels, where the keys are the level names
+ * and the values are `|`-separated strings containing logging methods allowed
+ * in that logging level. These strings are used to create a regular expression
+ * matching the function name being called.
+ *
+ * Levels provided by Video.js are:
+ *
+ * - `off`: Matches no calls. Any value that can be cast to `false` will have
+ * this effect. The most restrictive.
+ * - `all`: Matches only Video.js-provided functions (`debug`, `log`,
+ * `log.warn`, and `log.error`).
+ * - `debug`: Matches `log.debug`, `log`, `log.warn`, and `log.error` calls.
+ * - `info` (default): Matches `log`, `log.warn`, and `log.error` calls.
+ * - `warn`: Matches `log.warn` and `log.error` calls.
+ * - `error`: Matches only `log.error` calls.
+ *
+ * @type {Object}
+ */
+ log.levels = {
+ all: 'debug|log|warn|error',
+ off: '',
+ debug: 'debug|log|warn|error',
+ info: 'log|warn|error',
+ warn: 'warn|error',
+ error: 'error',
+ DEFAULT: level
+ };
+
+ /**
+ * Get or set the current logging level.
+ *
+ * If a string matching a key from {@link module:log.levels} is provided, acts
+ * as a setter.
+ *
+ * @param {'all'|'debug'|'info'|'warn'|'error'|'off'} [lvl]
+ * Pass a valid level to set a new logging level.
+ *
+ * @return {string}
+ * The current logging level.
+ */
+ log.level = lvl => {
+ if (typeof lvl === 'string') {
+ if (!log.levels.hasOwnProperty(lvl)) {
+ throw new Error(`"${lvl}" in not a valid log level`);
+ }
+ level = lvl;
+ }
+ return level;
+ };
+
+ /**
+ * Returns an array containing everything that has been logged to the history.
+ *
+ * This array is a shallow clone of the internal history record. However, its
+ * contents are _not_ cloned; so, mutating objects inside this array will
+ * mutate them in history.
+ *
+ * @return {Array}
+ */
+ log.history = () => history ? [].concat(history) : [];
+
+ /**
+ * Allows you to filter the history by the given logger name
+ *
+ * @param {string} fname
+ * The name to filter by
+ *
+ * @return {Array}
+ * The filtered list to return
+ */
+ log.history.filter = fname => {
+ return (history || []).filter(historyItem => {
+ // if the first item in each historyItem includes `fname`, then it's a match
+ return new RegExp(`.*${fname}.*`).test(historyItem[0]);
+ });
+ };
+
+ /**
+ * Clears the internal history tracking, but does not prevent further history
+ * tracking.
+ */
+ log.history.clear = () => {
+ if (history) {
+ history.length = 0;
+ }
+ };
+
+ /**
+ * Disable history tracking if it is currently enabled.
+ */
+ log.history.disable = () => {
+ if (history !== null) {
+ history.length = 0;
+ history = null;
+ }
+ };
+
+ /**
+ * Enable history tracking if it is currently disabled.
+ */
+ log.history.enable = () => {
+ if (history === null) {
+ history = [];
+ }
+ };
+
+ /**
+ * Logs error messages. Similar to `console.error`.
+ *
+ * @param {...*} args
+ * One or more messages or objects that should be logged as an error
+ */
+ log.error = (...args) => logByType('error', level, args);
+
+ /**
+ * Logs warning messages. Similar to `console.warn`.
+ *
+ * @param {...*} args
+ * One or more messages or objects that should be logged as a warning.
+ */
+ log.warn = (...args) => logByType('warn', level, args);
+
+ /**
+ * Logs debug messages. Similar to `console.debug`, but may also act as a comparable
+ * log if `console.debug` is not available
+ *
+ * @param {...*} args
+ * One or more messages or objects that should be logged as debug.
+ */
+ log.debug = (...args) => logByType('debug', level, args);
+ return log;
+ }
+
+ /**
+ * @file log.js
+ * @module log
+ */
+ const log$1 = createLogger$1('VIDEOJS');
+ const createLogger = log$1.createLogger;
+
+ /**
+ * @file obj.js
+ * @module obj
+ */
+
+ /**
+ * @callback obj:EachCallback
+ *
+ * @param {*} value
+ * The current key for the object that is being iterated over.
+ *
+ * @param {string} key
+ * The current key-value for object that is being iterated over
+ */
+
+ /**
+ * @callback obj:ReduceCallback
+ *
+ * @param {*} accum
+ * The value that is accumulating over the reduce loop.
+ *
+ * @param {*} value
+ * The current key for the object that is being iterated over.
+ *
+ * @param {string} key
+ * The current key-value for object that is being iterated over
+ *
+ * @return {*}
+ * The new accumulated value.
+ */
+ const toString$1 = Object.prototype.toString;
+
+ /**
+ * Get the keys of an Object
+ *
+ * @param {Object}
+ * The Object to get the keys from
+ *
+ * @return {string[]}
+ * An array of the keys from the object. Returns an empty array if the
+ * object passed in was invalid or had no keys.
+ *
+ * @private
+ */
+ const keys = function (object) {
+ return isObject$1(object) ? Object.keys(object) : [];
+ };
+
+ /**
+ * Array-like iteration for objects.
+ *
+ * @param {Object} object
+ * The object to iterate over
+ *
+ * @param {obj:EachCallback} fn
+ * The callback function which is called for each key in the object.
+ */
+ function each(object, fn) {
+ keys(object).forEach(key => fn(object[key], key));
+ }
+
+ /**
+ * Array-like reduce for objects.
+ *
+ * @param {Object} object
+ * The Object that you want to reduce.
+ *
+ * @param {Function} fn
+ * A callback function which is called for each key in the object. It
+ * receives the accumulated value and the per-iteration value and key
+ * as arguments.
+ *
+ * @param {*} [initial = 0]
+ * Starting value
+ *
+ * @return {*}
+ * The final accumulated value.
+ */
+ function reduce(object, fn, initial = 0) {
+ return keys(object).reduce((accum, key) => fn(accum, object[key], key), initial);
+ }
+
+ /**
+ * Returns whether a value is an object of any kind - including DOM nodes,
+ * arrays, regular expressions, etc. Not functions, though.
+ *
+ * This avoids the gotcha where using `typeof` on a `null` value
+ * results in `'object'`.
+ *
+ * @param {Object} value
+ * @return {boolean}
+ */
+ function isObject$1(value) {
+ return !!value && typeof value === 'object';
+ }
+
+ /**
+ * Returns whether an object appears to be a "plain" object - that is, a
+ * direct instance of `Object`.
+ *
+ * @param {Object} value
+ * @return {boolean}
+ */
+ function isPlain(value) {
+ return isObject$1(value) && toString$1.call(value) === '[object Object]' && value.constructor === Object;
+ }
+
+ /**
+ * Merge two objects recursively.
+ *
+ * Performs a deep merge like
+ * {@link https://lodash.com/docs/4.17.10#merge|lodash.merge}, but only merges
+ * plain objects (not arrays, elements, or anything else).
+ *
+ * Non-plain object values will be copied directly from the right-most
+ * argument.
+ *
+ * @param {Object[]} sources
+ * One or more objects to merge into a new object.
+ *
+ * @return {Object}
+ * A new object that is the merged result of all sources.
+ */
+ function merge$2(...sources) {
+ const result = {};
+ sources.forEach(source => {
+ if (!source) {
+ return;
+ }
+ each(source, (value, key) => {
+ if (!isPlain(value)) {
+ result[key] = value;
+ return;
+ }
+ if (!isPlain(result[key])) {
+ result[key] = {};
+ }
+ result[key] = merge$2(result[key], value);
+ });
+ });
+ return result;
+ }
+
+ /**
+ * Returns an array of values for a given object
+ *
+ * @param {Object} source - target object
+ * @return {Array<unknown>} - object values
+ */
+ function values$1(source = {}) {
+ const result = [];
+ for (const key in source) {
+ if (source.hasOwnProperty(key)) {
+ const value = source[key];
+ result.push(value);
+ }
+ }
+ return result;
+ }
+
+ /**
+ * Object.defineProperty but "lazy", which means that the value is only set after
+ * it is retrieved the first time, rather than being set right away.
+ *
+ * @param {Object} obj the object to set the property on
+ * @param {string} key the key for the property to set
+ * @param {Function} getValue the function used to get the value when it is needed.
+ * @param {boolean} setter whether a setter should be allowed or not
+ */
+ function defineLazyProperty(obj, key, getValue, setter = true) {
+ const set = value => Object.defineProperty(obj, key, {
+ value,
+ enumerable: true,
+ writable: true
+ });
+ const options = {
+ configurable: true,
+ enumerable: true,
+ get() {
+ const value = getValue();
+ set(value);
+ return value;
+ }
+ };
+ if (setter) {
+ options.set = set;
+ }
+ return Object.defineProperty(obj, key, options);
+ }
+
+ var Obj = /*#__PURE__*/Object.freeze({
+ __proto__: null,
+ each: each,
+ reduce: reduce,
+ isObject: isObject$1,
+ isPlain: isPlain,
+ merge: merge$2,
+ values: values$1,
+ defineLazyProperty: defineLazyProperty
+ });
+
+ /**
+ * @file browser.js
+ * @module browser
+ */
+
+ /**
+ * Whether or not this device is an iPod.
+ *
+ * @static
+ * @type {Boolean}
+ */
+ let IS_IPOD = false;
+
+ /**
+ * The detected iOS version - or `null`.
+ *
+ * @static
+ * @type {string|null}
+ */
+ let IOS_VERSION = null;
+
+ /**
+ * Whether or not this is an Android device.
+ *
+ * @static
+ * @type {Boolean}
+ */
+ let IS_ANDROID = false;
+
+ /**
+ * The detected Android version - or `null` if not Android or indeterminable.
+ *
+ * @static
+ * @type {number|string|null}
+ */
+ let ANDROID_VERSION;
+
+ /**
+ * Whether or not this is Mozilla Firefox.
+ *
+ * @static
+ * @type {Boolean}
+ */
+ let IS_FIREFOX = false;
+
+ /**
+ * Whether or not this is Microsoft Edge.
+ *
+ * @static
+ * @type {Boolean}
+ */
+ let IS_EDGE = false;
+
+ /**
+ * Whether or not this is any Chromium Browser
+ *
+ * @static
+ * @type {Boolean}
+ */
+ let IS_CHROMIUM = false;
+
+ /**
+ * Whether or not this is any Chromium browser that is not Edge.
+ *
+ * This will also be `true` for Chrome on iOS, which will have different support
+ * as it is actually Safari under the hood.
+ *
+ * Deprecated, as the behaviour to not match Edge was to prevent Legacy Edge's UA matching.
+ * IS_CHROMIUM should be used instead.
+ * "Chromium but not Edge" could be explicitly tested with IS_CHROMIUM && !IS_EDGE
+ *
+ * @static
+ * @deprecated
+ * @type {Boolean}
+ */
+ let IS_CHROME = false;
+
+ /**
+ * The detected Chromium version - or `null`.
+ *
+ * @static
+ * @type {number|null}
+ */
+ let CHROMIUM_VERSION = null;
+
+ /**
+ * The detected Google Chrome version - or `null`.
+ * This has always been the _Chromium_ version, i.e. would return on Chromium Edge.
+ * Deprecated, use CHROMIUM_VERSION instead.
+ *
+ * @static
+ * @deprecated
+ * @type {number|null}
+ */
+ let CHROME_VERSION = null;
+
+ /**
+ * The detected Internet Explorer version - or `null`.
+ *
+ * @static
+ * @deprecated
+ * @type {number|null}
+ */
+ let IE_VERSION = null;
+
+ /**
+ * Whether or not this is desktop Safari.
+ *
+ * @static
+ * @type {Boolean}
+ */
+ let IS_SAFARI = false;
+
+ /**
+ * Whether or not this is a Windows machine.
+ *
+ * @static
+ * @type {Boolean}
+ */
+ let IS_WINDOWS = false;
+
+ /**
+ * Whether or not this device is an iPad.
+ *
+ * @static
+ * @type {Boolean}
+ */
+ let IS_IPAD = false;
+
+ /**
+ * Whether or not this device is an iPhone.
+ *
+ * @static
+ * @type {Boolean}
+ */
+ // The Facebook app's UIWebView identifies as both an iPhone and iPad, so
+ // to identify iPhones, we need to exclude iPads.
+ // http://artsy.github.io/blog/2012/10/18/the-perils-of-ios-user-agent-sniffing/
+ let IS_IPHONE = false;
+
+ /**
+ * Whether or not this is a Tizen device.
+ *
+ * @static
+ * @type {Boolean}
+ */
+ let IS_TIZEN = false;
+
+ /**
+ * Whether or not this is a WebOS device.
+ *
+ * @static
+ * @type {Boolean}
+ */
+ let IS_WEBOS = false;
+
+ /**
+ * Whether or not this is a Smart TV (Tizen or WebOS) device.
+ *
+ * @static
+ * @type {Boolean}
+ */
+ let IS_SMART_TV = false;
+
+ /**
+ * Whether or not this device is touch-enabled.
+ *
+ * @static
+ * @const
+ * @type {Boolean}
+ */
+ const TOUCH_ENABLED = Boolean(isReal() && ('ontouchstart' in window || window.navigator.maxTouchPoints || window.DocumentTouch && window.document instanceof window.DocumentTouch));
+ const UAD = window.navigator && window.navigator.userAgentData;
+ if (UAD && UAD.platform && UAD.brands) {
+ // If userAgentData is present, use it instead of userAgent to avoid warnings
+ // Currently only implemented on Chromium
+ // userAgentData does not expose Android version, so ANDROID_VERSION remains `null`
+
+ IS_ANDROID = UAD.platform === 'Android';
+ IS_EDGE = Boolean(UAD.brands.find(b => b.brand === 'Microsoft Edge'));
+ IS_CHROMIUM = Boolean(UAD.brands.find(b => b.brand === 'Chromium'));
+ IS_CHROME = !IS_EDGE && IS_CHROMIUM;
+ CHROMIUM_VERSION = CHROME_VERSION = (UAD.brands.find(b => b.brand === 'Chromium') || {}).version || null;
+ IS_WINDOWS = UAD.platform === 'Windows';
+ }
+
+ // If the browser is not Chromium, either userAgentData is not present which could be an old Chromium browser,
+ // or it's a browser that has added userAgentData since that we don't have tests for yet. In either case,
+ // the checks need to be made agiainst the regular userAgent string.
+ if (!IS_CHROMIUM) {
+ const USER_AGENT = window.navigator && window.navigator.userAgent || '';
+ IS_IPOD = /iPod/i.test(USER_AGENT);
+ IOS_VERSION = function () {
+ const match = USER_AGENT.match(/OS (\d+)_/i);
+ if (match && match[1]) {
+ return match[1];
+ }
+ return null;
+ }();
+ IS_ANDROID = /Android/i.test(USER_AGENT);
+ ANDROID_VERSION = function () {
+ // This matches Android Major.Minor.Patch versions
+ // ANDROID_VERSION is Major.Minor as a Number, if Minor isn't available, then only Major is returned
+ const match = USER_AGENT.match(/Android (\d+)(?:\.(\d+))?(?:\.(\d+))*/i);
+ if (!match) {
+ return null;
+ }
+ const major = match[1] && parseFloat(match[1]);
+ const minor = match[2] && parseFloat(match[2]);
+ if (major && minor) {
+ return parseFloat(match[1] + '.' + match[2]);
+ } else if (major) {
+ return major;
+ }
+ return null;
+ }();
+ IS_FIREFOX = /Firefox/i.test(USER_AGENT);
+ IS_EDGE = /Edg/i.test(USER_AGENT);
+ IS_CHROMIUM = /Chrome/i.test(USER_AGENT) || /CriOS/i.test(USER_AGENT);
+ IS_CHROME = !IS_EDGE && IS_CHROMIUM;
+ CHROMIUM_VERSION = CHROME_VERSION = function () {
+ const match = USER_AGENT.match(/(Chrome|CriOS)\/(\d+)/);
+ if (match && match[2]) {
+ return parseFloat(match[2]);
+ }
+ return null;
+ }();
+ IE_VERSION = function () {
+ const result = /MSIE\s(\d+)\.\d/.exec(USER_AGENT);
+ let version = result && parseFloat(result[1]);
+ if (!version && /Trident\/7.0/i.test(USER_AGENT) && /rv:11.0/.test(USER_AGENT)) {
+ // IE 11 has a different user agent string than other IE versions
+ version = 11.0;
+ }
+ return version;
+ }();
+ IS_TIZEN = /Tizen/i.test(USER_AGENT);
+ IS_WEBOS = /Web0S/i.test(USER_AGENT);
+ IS_SMART_TV = IS_TIZEN || IS_WEBOS;
+ IS_SAFARI = /Safari/i.test(USER_AGENT) && !IS_CHROME && !IS_ANDROID && !IS_EDGE && !IS_SMART_TV;
+ IS_WINDOWS = /Windows/i.test(USER_AGENT);
+ IS_IPAD = /iPad/i.test(USER_AGENT) || IS_SAFARI && TOUCH_ENABLED && !/iPhone/i.test(USER_AGENT);
+ IS_IPHONE = /iPhone/i.test(USER_AGENT) && !IS_IPAD;
+ }
+
+ /**
+ * Whether or not this is an iOS device.
+ *
+ * @static
+ * @const
+ * @type {Boolean}
+ */
+ const IS_IOS = IS_IPHONE || IS_IPAD || IS_IPOD;
+
+ /**
+ * Whether or not this is any flavor of Safari - including iOS.
+ *
+ * @static
+ * @const
+ * @type {Boolean}
+ */
+ const IS_ANY_SAFARI = (IS_SAFARI || IS_IOS) && !IS_CHROME;
+
+ var browser = /*#__PURE__*/Object.freeze({
+ __proto__: null,
+ get IS_IPOD () { return IS_IPOD; },
+ get IOS_VERSION () { return IOS_VERSION; },
+ get IS_ANDROID () { return IS_ANDROID; },
+ get ANDROID_VERSION () { return ANDROID_VERSION; },
+ get IS_FIREFOX () { return IS_FIREFOX; },
+ get IS_EDGE () { return IS_EDGE; },
+ get IS_CHROMIUM () { return IS_CHROMIUM; },
+ get IS_CHROME () { return IS_CHROME; },
+ get CHROMIUM_VERSION () { return CHROMIUM_VERSION; },
+ get CHROME_VERSION () { return CHROME_VERSION; },
+ get IE_VERSION () { return IE_VERSION; },
+ get IS_SAFARI () { return IS_SAFARI; },
+ get IS_WINDOWS () { return IS_WINDOWS; },
+ get IS_IPAD () { return IS_IPAD; },
+ get IS_IPHONE () { return IS_IPHONE; },
+ get IS_TIZEN () { return IS_TIZEN; },
+ get IS_WEBOS () { return IS_WEBOS; },
+ get IS_SMART_TV () { return IS_SMART_TV; },
+ TOUCH_ENABLED: TOUCH_ENABLED,
+ IS_IOS: IS_IOS,
+ IS_ANY_SAFARI: IS_ANY_SAFARI
+ });
+
+ /**
+ * @file dom.js
+ * @module dom
+ */
+
+ /**
+ * Detect if a value is a string with any non-whitespace characters.
+ *
+ * @private
+ * @param {string} str
+ * The string to check
+ *
+ * @return {boolean}
+ * Will be `true` if the string is non-blank, `false` otherwise.
+ *
+ */
+ function isNonBlankString(str) {
+ // we use str.trim as it will trim any whitespace characters
+ // from the front or back of non-whitespace characters. aka
+ // Any string that contains non-whitespace characters will
+ // still contain them after `trim` but whitespace only strings
+ // will have a length of 0, failing this check.
+ return typeof str === 'string' && Boolean(str.trim());
+ }
+
+ /**
+ * Throws an error if the passed string has whitespace. This is used by
+ * class methods to be relatively consistent with the classList API.
+ *
+ * @private
+ * @param {string} str
+ * The string to check for whitespace.
+ *
+ * @throws {Error}
+ * Throws an error if there is whitespace in the string.
+ */
+ function throwIfWhitespace(str) {
+ // str.indexOf instead of regex because str.indexOf is faster performance wise.
+ if (str.indexOf(' ') >= 0) {
+ throw new Error('class has illegal whitespace characters');
+ }
+ }
+
+ /**
+ * Whether the current DOM interface appears to be real (i.e. not simulated).
+ *
+ * @return {boolean}
+ * Will be `true` if the DOM appears to be real, `false` otherwise.
+ */
+ function isReal() {
+ // Both document and window will never be undefined thanks to `global`.
+ return document === window.document;
+ }
+
+ /**
+ * Determines, via duck typing, whether or not a value is a DOM element.
+ *
+ * @param {*} value
+ * The value to check.
+ *
+ * @return {boolean}
+ * Will be `true` if the value is a DOM element, `false` otherwise.
+ */
+ function isEl(value) {
+ return isObject$1(value) && value.nodeType === 1;
+ }
+
+ /**
+ * Determines if the current DOM is embedded in an iframe.
+ *
+ * @return {boolean}
+ * Will be `true` if the DOM is embedded in an iframe, `false`
+ * otherwise.
+ */
+ function isInFrame() {
+ // We need a try/catch here because Safari will throw errors when attempting
+ // to get either `parent` or `self`
+ try {
+ return window.parent !== window.self;
+ } catch (x) {
+ return true;
+ }
+ }
+
+ /**
+ * Creates functions to query the DOM using a given method.
+ *
+ * @private
+ * @param {string} method
+ * The method to create the query with.
+ *
+ * @return {Function}
+ * The query method
+ */
+ function createQuerier(method) {
+ return function (selector, context) {
+ if (!isNonBlankString(selector)) {
+ return document[method](null);
+ }
+ if (isNonBlankString(context)) {
+ context = document.querySelector(context);
+ }
+ const ctx = isEl(context) ? context : document;
+ return ctx[method] && ctx[method](selector);
+ };
+ }
+
+ /**
+ * Creates an element and applies properties, attributes, and inserts content.
+ *
+ * @param {string} [tagName='div']
+ * Name of tag to be created.
+ *
+ * @param {Object} [properties={}]
+ * Element properties to be applied.
+ *
+ * @param {Object} [attributes={}]
+ * Element attributes to be applied.
+ *
+ * @param {ContentDescriptor} [content]
+ * A content descriptor object.
+ *
+ * @return {Element}
+ * The element that was created.
+ */
+ function createEl(tagName = 'div', properties = {}, attributes = {}, content) {
+ const el = document.createElement(tagName);
+ Object.getOwnPropertyNames(properties).forEach(function (propName) {
+ const val = properties[propName];
+
+ // Handle textContent since it's not supported everywhere and we have a
+ // method for it.
+ if (propName === 'textContent') {
+ textContent(el, val);
+ } else if (el[propName] !== val || propName === 'tabIndex') {
+ el[propName] = val;
+ }
+ });
+ Object.getOwnPropertyNames(attributes).forEach(function (attrName) {
+ el.setAttribute(attrName, attributes[attrName]);
+ });
+ if (content) {
+ appendContent(el, content);
+ }
+ return el;
+ }
+
+ /**
+ * Injects text into an element, replacing any existing contents entirely.
+ *
+ * @param {HTMLElement} el
+ * The element to add text content into
+ *
+ * @param {string} text
+ * The text content to add.
+ *
+ * @return {Element}
+ * The element with added text content.
+ */
+ function textContent(el, text) {
+ if (typeof el.textContent === 'undefined') {
+ el.innerText = text;
+ } else {
+ el.textContent = text;
+ }
+ return el;
+ }
+
+ /**
+ * Insert an element as the first child node of another
+ *
+ * @param {Element} child
+ * Element to insert
+ *
+ * @param {Element} parent
+ * Element to insert child into
+ */
+ function prependTo(child, parent) {
+ if (parent.firstChild) {
+ parent.insertBefore(child, parent.firstChild);
+ } else {
+ parent.appendChild(child);
+ }
+ }
+
+ /**
+ * Check if an element has a class name.
+ *
+ * @param {Element} element
+ * Element to check
+ *
+ * @param {string} classToCheck
+ * Class name to check for
+ *
+ * @return {boolean}
+ * Will be `true` if the element has a class, `false` otherwise.
+ *
+ * @throws {Error}
+ * Throws an error if `classToCheck` has white space.
+ */
+ function hasClass(element, classToCheck) {
+ throwIfWhitespace(classToCheck);
+ return element.classList.contains(classToCheck);
+ }
+
+ /**
+ * Add a class name to an element.
+ *
+ * @param {Element} element
+ * Element to add class name to.
+ *
+ * @param {...string} classesToAdd
+ * One or more class name to add.
+ *
+ * @return {Element}
+ * The DOM element with the added class name.
+ */
+ function addClass(element, ...classesToAdd) {
+ element.classList.add(...classesToAdd.reduce((prev, current) => prev.concat(current.split(/\s+/)), []));
+ return element;
+ }
+
+ /**
+ * Remove a class name from an element.
+ *
+ * @param {Element} element
+ * Element to remove a class name from.
+ *
+ * @param {...string} classesToRemove
+ * One or more class name to remove.
+ *
+ * @return {Element}
+ * The DOM element with class name removed.
+ */
+ function removeClass(element, ...classesToRemove) {
+ // Protect in case the player gets disposed
+ if (!element) {
+ log$1.warn("removeClass was called with an element that doesn't exist");
+ return null;
+ }
+ element.classList.remove(...classesToRemove.reduce((prev, current) => prev.concat(current.split(/\s+/)), []));
+ return element;
+ }
+
+ /**
+ * The callback definition for toggleClass.
+ *
+ * @callback module:dom~PredicateCallback
+ * @param {Element} element
+ * The DOM element of the Component.
+ *
+ * @param {string} classToToggle
+ * The `className` that wants to be toggled
+ *
+ * @return {boolean|undefined}
+ * If `true` is returned, the `classToToggle` will be added to the
+ * `element`. If `false`, the `classToToggle` will be removed from
+ * the `element`. If `undefined`, the callback will be ignored.
+ */
+
+ /**
+ * Adds or removes a class name to/from an element depending on an optional
+ * condition or the presence/absence of the class name.
+ *
+ * @param {Element} element
+ * The element to toggle a class name on.
+ *
+ * @param {string} classToToggle
+ * The class that should be toggled.
+ *
+ * @param {boolean|module:dom~PredicateCallback} [predicate]
+ * See the return value for {@link module:dom~PredicateCallback}
+ *
+ * @return {Element}
+ * The element with a class that has been toggled.
+ */
+ function toggleClass(element, classToToggle, predicate) {
+ if (typeof predicate === 'function') {
+ predicate = predicate(element, classToToggle);
+ }
+ if (typeof predicate !== 'boolean') {
+ predicate = undefined;
+ }
+ classToToggle.split(/\s+/).forEach(className => element.classList.toggle(className, predicate));
+ return element;
+ }
+
+ /**
+ * Apply attributes to an HTML element.
+ *
+ * @param {Element} el
+ * Element to add attributes to.
+ *
+ * @param {Object} [attributes]
+ * Attributes to be applied.
+ */
+ function setAttributes(el, attributes) {
+ Object.getOwnPropertyNames(attributes).forEach(function (attrName) {
+ const attrValue = attributes[attrName];
+ if (attrValue === null || typeof attrValue === 'undefined' || attrValue === false) {
+ el.removeAttribute(attrName);
+ } else {
+ el.setAttribute(attrName, attrValue === true ? '' : attrValue);
+ }
+ });
+ }
+
+ /**
+ * Get an element's attribute values, as defined on the HTML tag.
+ *
+ * Attributes are not the same as properties. They're defined on the tag
+ * or with setAttribute.
+ *
+ * @param {Element} tag
+ * Element from which to get tag attributes.
+ *
+ * @return {Object}
+ * All attributes of the element. Boolean attributes will be `true` or
+ * `false`, others will be strings.
+ */
+ function getAttributes(tag) {
+ const obj = {};
+
+ // known boolean attributes
+ // we can check for matching boolean properties, but not all browsers
+ // and not all tags know about these attributes, so, we still want to check them manually
+ const knownBooleans = ['autoplay', 'controls', 'playsinline', 'loop', 'muted', 'default', 'defaultMuted'];
+ if (tag && tag.attributes && tag.attributes.length > 0) {
+ const attrs = tag.attributes;
+ for (let i = attrs.length - 1; i >= 0; i--) {
+ const attrName = attrs[i].name;
+ /** @type {boolean|string} */
+ let attrVal = attrs[i].value;
+
+ // check for known booleans
+ // the matching element property will return a value for typeof
+ if (knownBooleans.includes(attrName)) {
+ // the value of an included boolean attribute is typically an empty
+ // string ('') which would equal false if we just check for a false value.
+ // we also don't want support bad code like autoplay='false'
+ attrVal = attrVal !== null ? true : false;
+ }
+ obj[attrName] = attrVal;
+ }
+ }
+ return obj;
+ }
+
+ /**
+ * Get the value of an element's attribute.
+ *
+ * @param {Element} el
+ * A DOM element.
+ *
+ * @param {string} attribute
+ * Attribute to get the value of.
+ *
+ * @return {string}
+ * The value of the attribute.
+ */
+ function getAttribute(el, attribute) {
+ return el.getAttribute(attribute);
+ }
+
+ /**
+ * Set the value of an element's attribute.
+ *
+ * @param {Element} el
+ * A DOM element.
+ *
+ * @param {string} attribute
+ * Attribute to set.
+ *
+ * @param {string} value
+ * Value to set the attribute to.
+ */
+ function setAttribute(el, attribute, value) {
+ el.setAttribute(attribute, value);
+ }
+
+ /**
+ * Remove an element's attribute.
+ *
+ * @param {Element} el
+ * A DOM element.
+ *
+ * @param {string} attribute
+ * Attribute to remove.
+ */
+ function removeAttribute(el, attribute) {
+ el.removeAttribute(attribute);
+ }
+
+ /**
+ * Attempt to block the ability to select text.
+ */
+ function blockTextSelection() {
+ document.body.focus();
+ document.onselectstart = function () {
+ return false;
+ };
+ }
+
+ /**
+ * Turn off text selection blocking.
+ */
+ function unblockTextSelection() {
+ document.onselectstart = function () {
+ return true;
+ };
+ }
+
+ /**
+ * Identical to the native `getBoundingClientRect` function, but ensures that
+ * the method is supported at all (it is in all browsers we claim to support)
+ * and that the element is in the DOM before continuing.
+ *
+ * This wrapper function also shims properties which are not provided by some
+ * older browsers (namely, IE8).
+ *
+ * Additionally, some browsers do not support adding properties to a
+ * `ClientRect`/`DOMRect` object; so, we shallow-copy it with the standard
+ * properties (except `x` and `y` which are not widely supported). This helps
+ * avoid implementations where keys are non-enumerable.
+ *
+ * @param {Element} el
+ * Element whose `ClientRect` we want to calculate.
+ *
+ * @return {Object|undefined}
+ * Always returns a plain object - or `undefined` if it cannot.
+ */
+ function getBoundingClientRect(el) {
+ if (el && el.getBoundingClientRect && el.parentNode) {
+ const rect = el.getBoundingClientRect();
+ const result = {};
+ ['bottom', 'height', 'left', 'right', 'top', 'width'].forEach(k => {
+ if (rect[k] !== undefined) {
+ result[k] = rect[k];
+ }
+ });
+ if (!result.height) {
+ result.height = parseFloat(computedStyle(el, 'height'));
+ }
+ if (!result.width) {
+ result.width = parseFloat(computedStyle(el, 'width'));
+ }
+ return result;
+ }
+ }
+
+ /**
+ * Represents the position of a DOM element on the page.
+ *
+ * @typedef {Object} module:dom~Position
+ *
+ * @property {number} left
+ * Pixels to the left.
+ *
+ * @property {number} top
+ * Pixels from the top.
+ */
+
+ /**
+ * Get the position of an element in the DOM.
+ *
+ * Uses `getBoundingClientRect` technique from John Resig.
+ *
+ * @see http://ejohn.org/blog/getboundingclientrect-is-awesome/
+ *
+ * @param {Element} el
+ * Element from which to get offset.
+ *
+ * @return {module:dom~Position}
+ * The position of the element that was passed in.
+ */
+ function findPosition(el) {
+ if (!el || el && !el.offsetParent) {
+ return {
+ left: 0,
+ top: 0,
+ width: 0,
+ height: 0
+ };
+ }
+ const width = el.offsetWidth;
+ const height = el.offsetHeight;
+ let left = 0;
+ let top = 0;
+ while (el.offsetParent && el !== document[FullscreenApi.fullscreenElement]) {
+ left += el.offsetLeft;
+ top += el.offsetTop;
+ el = el.offsetParent;
+ }
+ return {
+ left,
+ top,
+ width,
+ height
+ };
+ }
+
+ /**
+ * Represents x and y coordinates for a DOM element or mouse pointer.
+ *
+ * @typedef {Object} module:dom~Coordinates
+ *
+ * @property {number} x
+ * x coordinate in pixels
+ *
+ * @property {number} y
+ * y coordinate in pixels
+ */
+
+ /**
+ * Get the pointer position within an element.
+ *
+ * The base on the coordinates are the bottom left of the element.
+ *
+ * @param {Element} el
+ * Element on which to get the pointer position on.
+ *
+ * @param {Event} event
+ * Event object.
+ *
+ * @return {module:dom~Coordinates}
+ * A coordinates object corresponding to the mouse position.
+ *
+ */
+ function getPointerPosition(el, event) {
+ const translated = {
+ x: 0,
+ y: 0
+ };
+ if (IS_IOS) {
+ let item = el;
+ while (item && item.nodeName.toLowerCase() !== 'html') {
+ const transform = computedStyle(item, 'transform');
+ if (/^matrix/.test(transform)) {
+ const values = transform.slice(7, -1).split(/,\s/).map(Number);
+ translated.x += values[4];
+ translated.y += values[5];
+ } else if (/^matrix3d/.test(transform)) {
+ const values = transform.slice(9, -1).split(/,\s/).map(Number);
+ translated.x += values[12];
+ translated.y += values[13];
+ }
+ item = item.parentNode;
+ }
+ }
+ const position = {};
+ const boxTarget = findPosition(event.target);
+ const box = findPosition(el);
+ const boxW = box.width;
+ const boxH = box.height;
+ let offsetY = event.offsetY - (box.top - boxTarget.top);
+ let offsetX = event.offsetX - (box.left - boxTarget.left);
+ if (event.changedTouches) {
+ offsetX = event.changedTouches[0].pageX - box.left;
+ offsetY = event.changedTouches[0].pageY + box.top;
+ if (IS_IOS) {
+ offsetX -= translated.x;
+ offsetY -= translated.y;
+ }
+ }
+ position.y = 1 - Math.max(0, Math.min(1, offsetY / boxH));
+ position.x = Math.max(0, Math.min(1, offsetX / boxW));
+ return position;
+ }
+
+ /**
+ * Determines, via duck typing, whether or not a value is a text node.
+ *
+ * @param {*} value
+ * Check if this value is a text node.
+ *
+ * @return {boolean}
+ * Will be `true` if the value is a text node, `false` otherwise.
+ */
+ function isTextNode$1(value) {
+ return isObject$1(value) && value.nodeType === 3;
+ }
+
+ /**
+ * Empties the contents of an element.
+ *
+ * @param {Element} el
+ * The element to empty children from
+ *
+ * @return {Element}
+ * The element with no children
+ */
+ function emptyEl(el) {
+ while (el.firstChild) {
+ el.removeChild(el.firstChild);
+ }
+ return el;
+ }
+
+ /**
+ * This is a mixed value that describes content to be injected into the DOM
+ * via some method. It can be of the following types:
+ *
+ * Type | Description
+ * -----------|-------------
+ * `string` | The value will be normalized into a text node.
+ * `Element` | The value will be accepted as-is.
+ * `Text` | A TextNode. The value will be accepted as-is.
+ * `Array` | A one-dimensional array of strings, elements, text nodes, or functions. These functions should return a string, element, or text node (any other return value, like an array, will be ignored).
+ * `Function` | A function, which is expected to return a string, element, text node, or array - any of the other possible values described above. This means that a content descriptor could be a function that returns an array of functions, but those second-level functions must return strings, elements, or text nodes.
+ *
+ * @typedef {string|Element|Text|Array|Function} ContentDescriptor
+ */
+
+ /**
+ * Normalizes content for eventual insertion into the DOM.
+ *
+ * This allows a wide range of content definition methods, but helps protect
+ * from falling into the trap of simply writing to `innerHTML`, which could
+ * be an XSS concern.
+ *
+ * The content for an element can be passed in multiple types and
+ * combinations, whose behavior is as follows:
+ *
+ * @param {ContentDescriptor} content
+ * A content descriptor value.
+ *
+ * @return {Array}
+ * All of the content that was passed in, normalized to an array of
+ * elements or text nodes.
+ */
+ function normalizeContent(content) {
+ // First, invoke content if it is a function. If it produces an array,
+ // that needs to happen before normalization.
+ if (typeof content === 'function') {
+ content = content();
+ }
+
+ // Next up, normalize to an array, so one or many items can be normalized,
+ // filtered, and returned.
+ return (Array.isArray(content) ? content : [content]).map(value => {
+ // First, invoke value if it is a function to produce a new value,
+ // which will be subsequently normalized to a Node of some kind.
+ if (typeof value === 'function') {
+ value = value();
+ }
+ if (isEl(value) || isTextNode$1(value)) {
+ return value;
+ }
+ if (typeof value === 'string' && /\S/.test(value)) {
+ return document.createTextNode(value);
+ }
+ }).filter(value => value);
+ }
+
+ /**
+ * Normalizes and appends content to an element.
+ *
+ * @param {Element} el
+ * Element to append normalized content to.
+ *
+ * @param {ContentDescriptor} content
+ * A content descriptor value.
+ *
+ * @return {Element}
+ * The element with appended normalized content.
+ */
+ function appendContent(el, content) {
+ normalizeContent(content).forEach(node => el.appendChild(node));
+ return el;
+ }
+
+ /**
+ * Normalizes and inserts content into an element; this is identical to
+ * `appendContent()`, except it empties the element first.
+ *
+ * @param {Element} el
+ * Element to insert normalized content into.
+ *
+ * @param {ContentDescriptor} content
+ * A content descriptor value.
+ *
+ * @return {Element}
+ * The element with inserted normalized content.
+ */
+ function insertContent(el, content) {
+ return appendContent(emptyEl(el), content);
+ }
+
+ /**
+ * Check if an event was a single left click.
+ *
+ * @param {MouseEvent} event
+ * Event object.
+ *
+ * @return {boolean}
+ * Will be `true` if a single left click, `false` otherwise.
+ */
+ function isSingleLeftClick(event) {
+ // Note: if you create something draggable, be sure to
+ // call it on both `mousedown` and `mousemove` event,
+ // otherwise `mousedown` should be enough for a button
+
+ if (event.button === undefined && event.buttons === undefined) {
+ // Why do we need `buttons` ?
+ // Because, middle mouse sometimes have this:
+ // e.button === 0 and e.buttons === 4
+ // Furthermore, we want to prevent combination click, something like
+ // HOLD middlemouse then left click, that would be
+ // e.button === 0, e.buttons === 5
+ // just `button` is not gonna work
+
+ // Alright, then what this block does ?
+ // this is for chrome `simulate mobile devices`
+ // I want to support this as well
+
+ return true;
+ }
+ if (event.button === 0 && event.buttons === undefined) {
+ // Touch screen, sometimes on some specific device, `buttons`
+ // doesn't have anything (safari on ios, blackberry...)
+
+ return true;
+ }
+
+ // `mouseup` event on a single left click has
+ // `button` and `buttons` equal to 0
+ if (event.type === 'mouseup' && event.button === 0 && event.buttons === 0) {
+ return true;
+ }
+ if (event.button !== 0 || event.buttons !== 1) {
+ // This is the reason we have those if else block above
+ // if any special case we can catch and let it slide
+ // we do it above, when get to here, this definitely
+ // is-not-left-click
+
+ return false;
+ }
+ return true;
+ }
+
+ /**
+ * Finds a single DOM element matching `selector` within the optional
+ * `context` of another DOM element (defaulting to `document`).
+ *
+ * @param {string} selector
+ * A valid CSS selector, which will be passed to `querySelector`.
+ *
+ * @param {Element|String} [context=document]
+ * A DOM element within which to query. Can also be a selector
+ * string in which case the first matching element will be used
+ * as context. If missing (or no element matches selector), falls
+ * back to `document`.
+ *
+ * @return {Element|null}
+ * The element that was found or null.
+ */
+ const $ = createQuerier('querySelector');
+
+ /**
+ * Finds a all DOM elements matching `selector` within the optional
+ * `context` of another DOM element (defaulting to `document`).
+ *
+ * @param {string} selector
+ * A valid CSS selector, which will be passed to `querySelectorAll`.
+ *
+ * @param {Element|String} [context=document]
+ * A DOM element within which to query. Can also be a selector
+ * string in which case the first matching element will be used
+ * as context. If missing (or no element matches selector), falls
+ * back to `document`.
+ *
+ * @return {NodeList}
+ * A element list of elements that were found. Will be empty if none
+ * were found.
+ *
+ */
+ const $$ = createQuerier('querySelectorAll');
+
+ /**
+ * A safe getComputedStyle.
+ *
+ * This is needed because in Firefox, if the player is loaded in an iframe with
+ * `display:none`, then `getComputedStyle` returns `null`, so, we do a
+ * null-check to make sure that the player doesn't break in these cases.
+ *
+ * @param {Element} el
+ * The element you want the computed style of
+ *
+ * @param {string} prop
+ * The property name you want
+ *
+ * @see https://bugzilla.mozilla.org/show_bug.cgi?id=548397
+ */
+ function computedStyle(el, prop) {
+ if (!el || !prop) {
+ return '';
+ }
+ if (typeof window.getComputedStyle === 'function') {
+ let computedStyleValue;
+ try {
+ computedStyleValue = window.getComputedStyle(el);
+ } catch (e) {
+ return '';
+ }
+ return computedStyleValue ? computedStyleValue.getPropertyValue(prop) || computedStyleValue[prop] : '';
+ }
+ return '';
+ }
+
+ /**
+ * Copy document style sheets to another window.
+ *
+ * @param {Window} win
+ * The window element you want to copy the document style sheets to.
+ *
+ */
+ function copyStyleSheetsToWindow(win) {
+ [...document.styleSheets].forEach(styleSheet => {
+ try {
+ const cssRules = [...styleSheet.cssRules].map(rule => rule.cssText).join('');
+ const style = document.createElement('style');
+ style.textContent = cssRules;
+ win.document.head.appendChild(style);
+ } catch (e) {
+ const link = document.createElement('link');
+ link.rel = 'stylesheet';
+ link.type = styleSheet.type;
+ // For older Safari this has to be the string; on other browsers setting the MediaList works
+ link.media = styleSheet.media.mediaText;
+ link.href = styleSheet.href;
+ win.document.head.appendChild(link);
+ }
+ });
+ }
+
+ var Dom = /*#__PURE__*/Object.freeze({
+ __proto__: null,
+ isReal: isReal,
+ isEl: isEl,
+ isInFrame: isInFrame,
+ createEl: createEl,
+ textContent: textContent,
+ prependTo: prependTo,
+ hasClass: hasClass,
+ addClass: addClass,
+ removeClass: removeClass,
+ toggleClass: toggleClass,
+ setAttributes: setAttributes,
+ getAttributes: getAttributes,
+ getAttribute: getAttribute,
+ setAttribute: setAttribute,
+ removeAttribute: removeAttribute,
+ blockTextSelection: blockTextSelection,
+ unblockTextSelection: unblockTextSelection,
+ getBoundingClientRect: getBoundingClientRect,
+ findPosition: findPosition,
+ getPointerPosition: getPointerPosition,
+ isTextNode: isTextNode$1,
+ emptyEl: emptyEl,
+ normalizeContent: normalizeContent,
+ appendContent: appendContent,
+ insertContent: insertContent,
+ isSingleLeftClick: isSingleLeftClick,
+ $: $,
+ $$: $$,
+ computedStyle: computedStyle,
+ copyStyleSheetsToWindow: copyStyleSheetsToWindow
+ });
+
+ /**
+ * @file setup.js - Functions for setting up a player without
+ * user interaction based on the data-setup `attribute` of the video tag.
+ *
+ * @module setup
+ */
+ let _windowLoaded = false;
+ let videojs$1;
+
+ /**
+ * Set up any tags that have a data-setup `attribute` when the player is started.
+ */
+ const autoSetup = function () {
+ if (videojs$1.options.autoSetup === false) {
+ return;
+ }
+ const vids = Array.prototype.slice.call(document.getElementsByTagName('video'));
+ const audios = Array.prototype.slice.call(document.getElementsByTagName('audio'));
+ const divs = Array.prototype.slice.call(document.getElementsByTagName('video-js'));
+ const mediaEls = vids.concat(audios, divs);
+
+ // Check if any media elements exist
+ if (mediaEls && mediaEls.length > 0) {
+ for (let i = 0, e = mediaEls.length; i < e; i++) {
+ const mediaEl = mediaEls[i];
+
+ // Check if element exists, has getAttribute func.
+ if (mediaEl && mediaEl.getAttribute) {
+ // Make sure this player hasn't already been set up.
+ if (mediaEl.player === undefined) {
+ const options = mediaEl.getAttribute('data-setup');
+
+ // Check if data-setup attr exists.
+ // We only auto-setup if they've added the data-setup attr.
+ if (options !== null) {
+ // Create new video.js instance.
+ videojs$1(mediaEl);
+ }
+ }
+
+ // If getAttribute isn't defined, we need to wait for the DOM.
+ } else {
+ autoSetupTimeout(1);
+ break;
+ }
+ }
+
+ // No videos were found, so keep looping unless page is finished loading.
+ } else if (!_windowLoaded) {
+ autoSetupTimeout(1);
+ }
+ };
+
+ /**
+ * Wait until the page is loaded before running autoSetup. This will be called in
+ * autoSetup if `hasLoaded` returns false.
+ *
+ * @param {number} wait
+ * How long to wait in ms
+ *
+ * @param {module:videojs} [vjs]
+ * The videojs library function
+ */
+ function autoSetupTimeout(wait, vjs) {
+ // Protect against breakage in non-browser environments
+ if (!isReal()) {
+ return;
+ }
+ if (vjs) {
+ videojs$1 = vjs;
+ }
+ window.setTimeout(autoSetup, wait);
+ }
+
+ /**
+ * Used to set the internal tracking of window loaded state to true.
+ *
+ * @private
+ */
+ function setWindowLoaded() {
+ _windowLoaded = true;
+ window.removeEventListener('load', setWindowLoaded);
+ }
+ if (isReal()) {
+ if (document.readyState === 'complete') {
+ setWindowLoaded();
+ } else {
+ /**
+ * Listen for the load event on window, and set _windowLoaded to true.
+ *
+ * We use a standard event listener here to avoid incrementing the GUID
+ * before any players are created.
+ *
+ * @listens load
+ */
+ window.addEventListener('load', setWindowLoaded);
+ }
+ }
+
+ /**
+ * @file stylesheet.js
+ * @module stylesheet
+ */
+
+ /**
+ * Create a DOM style element given a className for it.
+ *
+ * @param {string} className
+ * The className to add to the created style element.
+ *
+ * @return {Element}
+ * The element that was created.
+ */
+ const createStyleElement = function (className) {
+ const style = document.createElement('style');
+ style.className = className;
+ return style;
+ };
+
+ /**
+ * Add text to a DOM element.
+ *
+ * @param {Element} el
+ * The Element to add text content to.
+ *
+ * @param {string} content
+ * The text to add to the element.
+ */
+ const setTextContent = function (el, content) {
+ if (el.styleSheet) {
+ el.styleSheet.cssText = content;
+ } else {
+ el.textContent = content;
+ }
+ };
+
+ /**
+ * @file dom-data.js
+ * @module dom-data
+ */
+
+ /**
+ * Element Data Store.
+ *
+ * Allows for binding data to an element without putting it directly on the
+ * element. Ex. Event listeners are stored here.
+ * (also from jsninja.com, slightly modified and updated for closure compiler)
+ *
+ * @type {Object}
+ * @private
+ */
+ var DomData = new WeakMap();
+
+ /**
+ * @file guid.js
+ * @module guid
+ */
+
+ // Default value for GUIDs. This allows us to reset the GUID counter in tests.
+ //
+ // The initial GUID is 3 because some users have come to rely on the first
+ // default player ID ending up as `vjs_video_3`.
+ //
+ // See: https://github.com/videojs/video.js/pull/6216
+ const _initialGuid = 3;
+
+ /**
+ * Unique ID for an element or function
+ *
+ * @type {Number}
+ */
+ let _guid = _initialGuid;
+
+ /**
+ * Get a unique auto-incrementing ID by number that has not been returned before.
+ *
+ * @return {number}
+ * A new unique ID.
+ */
+ function newGUID() {
+ return _guid++;
+ }
+
+ /**
+ * @file events.js. An Event System (John Resig - Secrets of a JS Ninja http://jsninja.com/)
+ * (Original book version wasn't completely usable, so fixed some things and made Closure Compiler compatible)
+ * This should work very similarly to jQuery's events, however it's based off the book version which isn't as
+ * robust as jquery's, so there's probably some differences.
+ *
+ * @file events.js
+ * @module events
+ */
+
+ /**
+ * Clean up the listener cache and dispatchers
+ *
+ * @param {Element|Object} elem
+ * Element to clean up
+ *
+ * @param {string} type
+ * Type of event to clean up
+ */
+ function _cleanUpEvents(elem, type) {
+ if (!DomData.has(elem)) {
+ return;
+ }
+ const data = DomData.get(elem);
+
+ // Remove the events of a particular type if there are none left
+ if (data.handlers[type].length === 0) {
+ delete data.handlers[type];
+ // data.handlers[type] = null;
+ // Setting to null was causing an error with data.handlers
+
+ // Remove the meta-handler from the element
+ if (elem.removeEventListener) {
+ elem.removeEventListener(type, data.dispatcher, false);
+ } else if (elem.detachEvent) {
+ elem.detachEvent('on' + type, data.dispatcher);
+ }
+ }
+
+ // Remove the events object if there are no types left
+ if (Object.getOwnPropertyNames(data.handlers).length <= 0) {
+ delete data.handlers;
+ delete data.dispatcher;
+ delete data.disabled;
+ }
+
+ // Finally remove the element data if there is no data left
+ if (Object.getOwnPropertyNames(data).length === 0) {
+ DomData.delete(elem);
+ }
+ }
+
+ /**
+ * Loops through an array of event types and calls the requested method for each type.
+ *
+ * @param {Function} fn
+ * The event method we want to use.
+ *
+ * @param {Element|Object} elem
+ * Element or object to bind listeners to
+ *
+ * @param {string[]} types
+ * Type of event to bind to.
+ *
+ * @param {Function} callback
+ * Event listener.
+ */
+ function _handleMultipleEvents(fn, elem, types, callback) {
+ types.forEach(function (type) {
+ // Call the event method for each one of the types
+ fn(elem, type, callback);
+ });
+ }
+
+ /**
+ * Fix a native event to have standard property values
+ *
+ * @param {Object} event
+ * Event object to fix.
+ *
+ * @return {Object}
+ * Fixed event object.
+ */
+ function fixEvent(event) {
+ if (event.fixed_) {
+ return event;
+ }
+ function returnTrue() {
+ return true;
+ }
+ function returnFalse() {
+ return false;
+ }
+
+ // Test if fixing up is needed
+ // Used to check if !event.stopPropagation instead of isPropagationStopped
+ // But native events return true for stopPropagation, but don't have
+ // other expected methods like isPropagationStopped. Seems to be a problem
+ // with the Javascript Ninja code. So we're just overriding all events now.
+ if (!event || !event.isPropagationStopped || !event.isImmediatePropagationStopped) {
+ const old = event || window.event;
+ event = {};
+ // Clone the old object so that we can modify the values event = {};
+ // IE8 Doesn't like when you mess with native event properties
+ // Firefox returns false for event.hasOwnProperty('type') and other props
+ // which makes copying more difficult.
+ // TODO: Probably best to create a whitelist of event props
+ for (const key in old) {
+ // Safari 6.0.3 warns you if you try to copy deprecated layerX/Y
+ // Chrome warns you if you try to copy deprecated keyboardEvent.keyLocation
+ // and webkitMovementX/Y
+ // Lighthouse complains if Event.path is copied
+ if (key !== 'layerX' && key !== 'layerY' && key !== 'keyLocation' && key !== 'webkitMovementX' && key !== 'webkitMovementY' && key !== 'path') {
+ // Chrome 32+ warns if you try to copy deprecated returnValue, but
+ // we still want to if preventDefault isn't supported (IE8).
+ if (!(key === 'returnValue' && old.preventDefault)) {
+ event[key] = old[key];
+ }
+ }
+ }
+
+ // The event occurred on this element
+ if (!event.target) {
+ event.target = event.srcElement || document;
+ }
+
+ // Handle which other element the event is related to
+ if (!event.relatedTarget) {
+ event.relatedTarget = event.fromElement === event.target ? event.toElement : event.fromElement;
+ }
+
+ // Stop the default browser action
+ event.preventDefault = function () {
+ if (old.preventDefault) {
+ old.preventDefault();
+ }
+ event.returnValue = false;
+ old.returnValue = false;
+ event.defaultPrevented = true;
+ };
+ event.defaultPrevented = false;
+
+ // Stop the event from bubbling
+ event.stopPropagation = function () {
+ if (old.stopPropagation) {
+ old.stopPropagation();
+ }
+ event.cancelBubble = true;
+ old.cancelBubble = true;
+ event.isPropagationStopped = returnTrue;
+ };
+ event.isPropagationStopped = returnFalse;
+
+ // Stop the event from bubbling and executing other handlers
+ event.stopImmediatePropagation = function () {
+ if (old.stopImmediatePropagation) {
+ old.stopImmediatePropagation();
+ }
+ event.isImmediatePropagationStopped = returnTrue;
+ event.stopPropagation();
+ };
+ event.isImmediatePropagationStopped = returnFalse;
+
+ // Handle mouse position
+ if (event.clientX !== null && event.clientX !== undefined) {
+ const doc = document.documentElement;
+ const body = document.body;
+ event.pageX = event.clientX + (doc && doc.scrollLeft || body && body.scrollLeft || 0) - (doc && doc.clientLeft || body && body.clientLeft || 0);
+ event.pageY = event.clientY + (doc && doc.scrollTop || body && body.scrollTop || 0) - (doc && doc.clientTop || body && body.clientTop || 0);
+ }
+
+ // Handle key presses
+ event.which = event.charCode || event.keyCode;
+
+ // Fix button for mouse clicks:
+ // 0 == left; 1 == middle; 2 == right
+ if (event.button !== null && event.button !== undefined) {
+ // The following is disabled because it does not pass videojs-standard
+ // and... yikes.
+ /* eslint-disable */
+ event.button = event.button & 1 ? 0 : event.button & 4 ? 1 : event.button & 2 ? 2 : 0;
+ /* eslint-enable */
+ }
+ }
+
+ event.fixed_ = true;
+ // Returns fixed-up instance
+ return event;
+ }
+
+ /**
+ * Whether passive event listeners are supported
+ */
+ let _supportsPassive;
+ const supportsPassive = function () {
+ if (typeof _supportsPassive !== 'boolean') {
+ _supportsPassive = false;
+ try {
+ const opts = Object.defineProperty({}, 'passive', {
+ get() {
+ _supportsPassive = true;
+ }
+ });
+ window.addEventListener('test', null, opts);
+ window.removeEventListener('test', null, opts);
+ } catch (e) {
+ // disregard
+ }
+ }
+ return _supportsPassive;
+ };
+
+ /**
+ * Touch events Chrome expects to be passive
+ */
+ const passiveEvents = ['touchstart', 'touchmove'];
+
+ /**
+ * Add an event listener to element
+ * It stores the handler function in a separate cache object
+ * and adds a generic handler to the element's event,
+ * along with a unique id (guid) to the element.
+ *
+ * @param {Element|Object} elem
+ * Element or object to bind listeners to
+ *
+ * @param {string|string[]} type
+ * Type of event to bind to.
+ *
+ * @param {Function} fn
+ * Event listener.
+ */
+ function on(elem, type, fn) {
+ if (Array.isArray(type)) {
+ return _handleMultipleEvents(on, elem, type, fn);
+ }
+ if (!DomData.has(elem)) {
+ DomData.set(elem, {});
+ }
+ const data = DomData.get(elem);
+
+ // We need a place to store all our handler data
+ if (!data.handlers) {
+ data.handlers = {};
+ }
+ if (!data.handlers[type]) {
+ data.handlers[type] = [];
+ }
+ if (!fn.guid) {
+ fn.guid = newGUID();
+ }
+ data.handlers[type].push(fn);
+ if (!data.dispatcher) {
+ data.disabled = false;
+ data.dispatcher = function (event, hash) {
+ if (data.disabled) {
+ return;
+ }
+ event = fixEvent(event);
+ const handlers = data.handlers[event.type];
+ if (handlers) {
+ // Copy handlers so if handlers are added/removed during the process it doesn't throw everything off.
+ const handlersCopy = handlers.slice(0);
+ for (let m = 0, n = handlersCopy.length; m < n; m++) {
+ if (event.isImmediatePropagationStopped()) {
+ break;
+ } else {
+ try {
+ handlersCopy[m].call(elem, event, hash);
+ } catch (e) {
+ log$1.error(e);
+ }
+ }
+ }
+ }
+ };
+ }
+ if (data.handlers[type].length === 1) {
+ if (elem.addEventListener) {
+ let options = false;
+ if (supportsPassive() && passiveEvents.indexOf(type) > -1) {
+ options = {
+ passive: true
+ };
+ }
+ elem.addEventListener(type, data.dispatcher, options);
+ } else if (elem.attachEvent) {
+ elem.attachEvent('on' + type, data.dispatcher);
+ }
+ }
+ }
+
+ /**
+ * Removes event listeners from an element
+ *
+ * @param {Element|Object} elem
+ * Object to remove listeners from.
+ *
+ * @param {string|string[]} [type]
+ * Type of listener to remove. Don't include to remove all events from element.
+ *
+ * @param {Function} [fn]
+ * Specific listener to remove. Don't include to remove listeners for an event
+ * type.
+ */
+ function off(elem, type, fn) {
+ // Don't want to add a cache object through getElData if not needed
+ if (!DomData.has(elem)) {
+ return;
+ }
+ const data = DomData.get(elem);
+
+ // If no events exist, nothing to unbind
+ if (!data.handlers) {
+ return;
+ }
+ if (Array.isArray(type)) {
+ return _handleMultipleEvents(off, elem, type, fn);
+ }
+
+ // Utility function
+ const removeType = function (el, t) {
+ data.handlers[t] = [];
+ _cleanUpEvents(el, t);
+ };
+
+ // Are we removing all bound events?
+ if (type === undefined) {
+ for (const t in data.handlers) {
+ if (Object.prototype.hasOwnProperty.call(data.handlers || {}, t)) {
+ removeType(elem, t);
+ }
+ }
+ return;
+ }
+ const handlers = data.handlers[type];
+
+ // If no handlers exist, nothing to unbind
+ if (!handlers) {
+ return;
+ }
+
+ // If no listener was provided, remove all listeners for type
+ if (!fn) {
+ removeType(elem, type);
+ return;
+ }
+
+ // We're only removing a single handler
+ if (fn.guid) {
+ for (let n = 0; n < handlers.length; n++) {
+ if (handlers[n].guid === fn.guid) {
+ handlers.splice(n--, 1);
+ }
+ }
+ }
+ _cleanUpEvents(elem, type);
+ }
+
+ /**
+ * Trigger an event for an element
+ *
+ * @param {Element|Object} elem
+ * Element to trigger an event on
+ *
+ * @param {EventTarget~Event|string} event
+ * A string (the type) or an event object with a type attribute
+ *
+ * @param {Object} [hash]
+ * data hash to pass along with the event
+ *
+ * @return {boolean|undefined}
+ * Returns the opposite of `defaultPrevented` if default was
+ * prevented. Otherwise, returns `undefined`
+ */
+ function trigger(elem, event, hash) {
+ // Fetches element data and a reference to the parent (for bubbling).
+ // Don't want to add a data object to cache for every parent,
+ // so checking hasElData first.
+ const elemData = DomData.has(elem) ? DomData.get(elem) : {};
+ const parent = elem.parentNode || elem.ownerDocument;
+ // type = event.type || event,
+ // handler;
+
+ // If an event name was passed as a string, creates an event out of it
+ if (typeof event === 'string') {
+ event = {
+ type: event,
+ target: elem
+ };
+ } else if (!event.target) {
+ event.target = elem;
+ }
+
+ // Normalizes the event properties.
+ event = fixEvent(event);
+
+ // If the passed element has a dispatcher, executes the established handlers.
+ if (elemData.dispatcher) {
+ elemData.dispatcher.call(elem, event, hash);
+ }
+
+ // Unless explicitly stopped or the event does not bubble (e.g. media events)
+ // recursively calls this function to bubble the event up the DOM.
+ if (parent && !event.isPropagationStopped() && event.bubbles === true) {
+ trigger.call(null, parent, event, hash);
+
+ // If at the top of the DOM, triggers the default action unless disabled.
+ } else if (!parent && !event.defaultPrevented && event.target && event.target[event.type]) {
+ if (!DomData.has(event.target)) {
+ DomData.set(event.target, {});
+ }
+ const targetData = DomData.get(event.target);
+
+ // Checks if the target has a default action for this event.
+ if (event.target[event.type]) {
+ // Temporarily disables event dispatching on the target as we have already executed the handler.
+ targetData.disabled = true;
+ // Executes the default action.
+ if (typeof event.target[event.type] === 'function') {
+ event.target[event.type]();
+ }
+ // Re-enables event dispatching.
+ targetData.disabled = false;
+ }
+ }
+
+ // Inform the triggerer if the default was prevented by returning false
+ return !event.defaultPrevented;
+ }
+
+ /**
+ * Trigger a listener only once for an event.
+ *
+ * @param {Element|Object} elem
+ * Element or object to bind to.
+ *
+ * @param {string|string[]} type
+ * Name/type of event
+ *
+ * @param {Event~EventListener} fn
+ * Event listener function
+ */
+ function one(elem, type, fn) {
+ if (Array.isArray(type)) {
+ return _handleMultipleEvents(one, elem, type, fn);
+ }
+ const func = function () {
+ off(elem, type, func);
+ fn.apply(this, arguments);
+ };
+
+ // copy the guid to the new function so it can removed using the original function's ID
+ func.guid = fn.guid = fn.guid || newGUID();
+ on(elem, type, func);
+ }
+
+ /**
+ * Trigger a listener only once and then turn if off for all
+ * configured events
+ *
+ * @param {Element|Object} elem
+ * Element or object to bind to.
+ *
+ * @param {string|string[]} type
+ * Name/type of event
+ *
+ * @param {Event~EventListener} fn
+ * Event listener function
+ */
+ function any(elem, type, fn) {
+ const func = function () {
+ off(elem, type, func);
+ fn.apply(this, arguments);
+ };
+
+ // copy the guid to the new function so it can removed using the original function's ID
+ func.guid = fn.guid = fn.guid || newGUID();
+
+ // multiple ons, but one off for everything
+ on(elem, type, func);
+ }
+
+ var Events = /*#__PURE__*/Object.freeze({
+ __proto__: null,
+ fixEvent: fixEvent,
+ on: on,
+ off: off,
+ trigger: trigger,
+ one: one,
+ any: any
+ });
+
+ /**
+ * @file fn.js
+ * @module fn
+ */
+ const UPDATE_REFRESH_INTERVAL = 30;
+
+ /**
+ * A private, internal-only function for changing the context of a function.
+ *
+ * It also stores a unique id on the function so it can be easily removed from
+ * events.
+ *
+ * @private
+ * @function
+ * @param {*} context
+ * The object to bind as scope.
+ *
+ * @param {Function} fn
+ * The function to be bound to a scope.
+ *
+ * @param {number} [uid]
+ * An optional unique ID for the function to be set
+ *
+ * @return {Function}
+ * The new function that will be bound into the context given
+ */
+ const bind_ = function (context, fn, uid) {
+ // Make sure the function has a unique ID
+ if (!fn.guid) {
+ fn.guid = newGUID();
+ }
+
+ // Create the new function that changes the context
+ const bound = fn.bind(context);
+
+ // Allow for the ability to individualize this function
+ // Needed in the case where multiple objects might share the same prototype
+ // IF both items add an event listener with the same function, then you try to remove just one
+ // it will remove both because they both have the same guid.
+ // when using this, you need to use the bind method when you remove the listener as well.
+ // currently used in text tracks
+ bound.guid = uid ? uid + '_' + fn.guid : fn.guid;
+ return bound;
+ };
+
+ /**
+ * Wraps the given function, `fn`, with a new function that only invokes `fn`
+ * at most once per every `wait` milliseconds.
+ *
+ * @function
+ * @param {Function} fn
+ * The function to be throttled.
+ *
+ * @param {number} wait
+ * The number of milliseconds by which to throttle.
+ *
+ * @return {Function}
+ */
+ const throttle = function (fn, wait) {
+ let last = window.performance.now();
+ const throttled = function (...args) {
+ const now = window.performance.now();
+ if (now - last >= wait) {
+ fn(...args);
+ last = now;
+ }
+ };
+ return throttled;
+ };
+
+ /**
+ * Creates a debounced function that delays invoking `func` until after `wait`
+ * milliseconds have elapsed since the last time the debounced function was
+ * invoked.
+ *
+ * Inspired by lodash and underscore implementations.
+ *
+ * @function
+ * @param {Function} func
+ * The function to wrap with debounce behavior.
+ *
+ * @param {number} wait
+ * The number of milliseconds to wait after the last invocation.
+ *
+ * @param {boolean} [immediate]
+ * Whether or not to invoke the function immediately upon creation.
+ *
+ * @param {Object} [context=window]
+ * The "context" in which the debounced function should debounce. For
+ * example, if this function should be tied to a Video.js player,
+ * the player can be passed here. Alternatively, defaults to the
+ * global `window` object.
+ *
+ * @return {Function}
+ * A debounced function.
+ */
+ const debounce = function (func, wait, immediate, context = window) {
+ let timeout;
+ const cancel = () => {
+ context.clearTimeout(timeout);
+ timeout = null;
+ };
+
+ /* eslint-disable consistent-this */
+ const debounced = function () {
+ const self = this;
+ const args = arguments;
+ let later = function () {
+ timeout = null;
+ later = null;
+ if (!immediate) {
+ func.apply(self, args);
+ }
+ };
+ if (!timeout && immediate) {
+ func.apply(self, args);
+ }
+ context.clearTimeout(timeout);
+ timeout = context.setTimeout(later, wait);
+ };
+ /* eslint-enable consistent-this */
+
+ debounced.cancel = cancel;
+ return debounced;
+ };
+
+ var Fn = /*#__PURE__*/Object.freeze({
+ __proto__: null,
+ UPDATE_REFRESH_INTERVAL: UPDATE_REFRESH_INTERVAL,
+ bind_: bind_,
+ throttle: throttle,
+ debounce: debounce
+ });
+
+ /**
+ * @file src/js/event-target.js
+ */
+ let EVENT_MAP;
+
+ /**
+ * `EventTarget` is a class that can have the same API as the DOM `EventTarget`. It
+ * adds shorthand functions that wrap around lengthy functions. For example:
+ * the `on` function is a wrapper around `addEventListener`.
+ *
+ * @see [EventTarget Spec]{@link https://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-EventTarget}
+ * @class EventTarget
+ */
+ class EventTarget$2 {
+ /**
+ * Adds an `event listener` to an instance of an `EventTarget`. An `event listener` is a
+ * function that will get called when an event with a certain name gets triggered.
+ *
+ * @param {string|string[]} type
+ * An event name or an array of event names.
+ *
+ * @param {Function} fn
+ * The function to call with `EventTarget`s
+ */
+ on(type, fn) {
+ // Remove the addEventListener alias before calling Events.on
+ // so we don't get into an infinite type loop
+ const ael = this.addEventListener;
+ this.addEventListener = () => {};
+ on(this, type, fn);
+ this.addEventListener = ael;
+ }
+ /**
+ * Removes an `event listener` for a specific event from an instance of `EventTarget`.
+ * This makes it so that the `event listener` will no longer get called when the
+ * named event happens.
+ *
+ * @param {string|string[]} type
+ * An event name or an array of event names.
+ *
+ * @param {Function} fn
+ * The function to remove.
+ */
+ off(type, fn) {
+ off(this, type, fn);
+ }
+ /**
+ * This function will add an `event listener` that gets triggered only once. After the
+ * first trigger it will get removed. This is like adding an `event listener`
+ * with {@link EventTarget#on} that calls {@link EventTarget#off} on itself.
+ *
+ * @param {string|string[]} type
+ * An event name or an array of event names.
+ *
+ * @param {Function} fn
+ * The function to be called once for each event name.
+ */
+ one(type, fn) {
+ // Remove the addEventListener aliasing Events.on
+ // so we don't get into an infinite type loop
+ const ael = this.addEventListener;
+ this.addEventListener = () => {};
+ one(this, type, fn);
+ this.addEventListener = ael;
+ }
+ /**
+ * This function will add an `event listener` that gets triggered only once and is
+ * removed from all events. This is like adding an array of `event listener`s
+ * with {@link EventTarget#on} that calls {@link EventTarget#off} on all events the
+ * first time it is triggered.
+ *
+ * @param {string|string[]} type
+ * An event name or an array of event names.
+ *
+ * @param {Function} fn
+ * The function to be called once for each event name.
+ */
+ any(type, fn) {
+ // Remove the addEventListener aliasing Events.on
+ // so we don't get into an infinite type loop
+ const ael = this.addEventListener;
+ this.addEventListener = () => {};
+ any(this, type, fn);
+ this.addEventListener = ael;
+ }
+ /**
+ * This function causes an event to happen. This will then cause any `event listeners`
+ * that are waiting for that event, to get called. If there are no `event listeners`
+ * for an event then nothing will happen.
+ *
+ * If the name of the `Event` that is being triggered is in `EventTarget.allowedEvents_`.
+ * Trigger will also call the `on` + `uppercaseEventName` function.
+ *
+ * Example:
+ * 'click' is in `EventTarget.allowedEvents_`, so, trigger will attempt to call
+ * `onClick` if it exists.
+ *
+ * @param {string|EventTarget~Event|Object} event
+ * The name of the event, an `Event`, or an object with a key of type set to
+ * an event name.
+ */
+ trigger(event) {
+ const type = event.type || event;
+
+ // deprecation
+ // In a future version we should default target to `this`
+ // similar to how we default the target to `elem` in
+ // `Events.trigger`. Right now the default `target` will be
+ // `document` due to the `Event.fixEvent` call.
+ if (typeof event === 'string') {
+ event = {
+ type
+ };
+ }
+ event = fixEvent(event);
+ if (this.allowedEvents_[type] && this['on' + type]) {
+ this['on' + type](event);
+ }
+ trigger(this, event);
+ }
+ queueTrigger(event) {
+ // only set up EVENT_MAP if it'll be used
+ if (!EVENT_MAP) {
+ EVENT_MAP = new Map();
+ }
+ const type = event.type || event;
+ let map = EVENT_MAP.get(this);
+ if (!map) {
+ map = new Map();
+ EVENT_MAP.set(this, map);
+ }
+ const oldTimeout = map.get(type);
+ map.delete(type);
+ window.clearTimeout(oldTimeout);
+ const timeout = window.setTimeout(() => {
+ map.delete(type);
+ // if we cleared out all timeouts for the current target, delete its map
+ if (map.size === 0) {
+ map = null;
+ EVENT_MAP.delete(this);
+ }
+ this.trigger(event);
+ }, 0);
+ map.set(type, timeout);
+ }
+ }
+
+ /**
+ * A Custom DOM event.
+ *
+ * @typedef {CustomEvent} Event
+ * @see [Properties]{@link https://developer.mozilla.org/en-US/docs/Web/API/CustomEvent}
+ */
+
+ /**
+ * All event listeners should follow the following format.
+ *
+ * @callback EventListener
+ * @this {EventTarget}
+ *
+ * @param {Event} event
+ * the event that triggered this function
+ *
+ * @param {Object} [hash]
+ * hash of data sent during the event
+ */
+
+ /**
+ * An object containing event names as keys and booleans as values.
+ *
+ * > NOTE: If an event name is set to a true value here {@link EventTarget#trigger}
+ * will have extra functionality. See that function for more information.
+ *
+ * @property EventTarget.prototype.allowedEvents_
+ * @protected
+ */
+ EventTarget$2.prototype.allowedEvents_ = {};
+
+ /**
+ * An alias of {@link EventTarget#on}. Allows `EventTarget` to mimic
+ * the standard DOM API.
+ *
+ * @function
+ * @see {@link EventTarget#on}
+ */
+ EventTarget$2.prototype.addEventListener = EventTarget$2.prototype.on;
+
+ /**
+ * An alias of {@link EventTarget#off}. Allows `EventTarget` to mimic
+ * the standard DOM API.
+ *
+ * @function
+ * @see {@link EventTarget#off}
+ */
+ EventTarget$2.prototype.removeEventListener = EventTarget$2.prototype.off;
+
+ /**
+ * An alias of {@link EventTarget#trigger}. Allows `EventTarget` to mimic
+ * the standard DOM API.
+ *
+ * @function
+ * @see {@link EventTarget#trigger}
+ */
+ EventTarget$2.prototype.dispatchEvent = EventTarget$2.prototype.trigger;
+
+ /**
+ * @file mixins/evented.js
+ * @module evented
+ */
+ const objName = obj => {
+ if (typeof obj.name === 'function') {
+ return obj.name();
+ }
+ if (typeof obj.name === 'string') {
+ return obj.name;
+ }
+ if (obj.name_) {
+ return obj.name_;
+ }
+ if (obj.constructor && obj.constructor.name) {
+ return obj.constructor.name;
+ }
+ return typeof obj;
+ };
+
+ /**
+ * Returns whether or not an object has had the evented mixin applied.
+ *
+ * @param {Object} object
+ * An object to test.
+ *
+ * @return {boolean}
+ * Whether or not the object appears to be evented.
+ */
+ const isEvented = object => object instanceof EventTarget$2 || !!object.eventBusEl_ && ['on', 'one', 'off', 'trigger'].every(k => typeof object[k] === 'function');
+
+ /**
+ * Adds a callback to run after the evented mixin applied.
+ *
+ * @param {Object} target
+ * An object to Add
+ * @param {Function} callback
+ * The callback to run.
+ */
+ const addEventedCallback = (target, callback) => {
+ if (isEvented(target)) {
+ callback();
+ } else {
+ if (!target.eventedCallbacks) {
+ target.eventedCallbacks = [];
+ }
+ target.eventedCallbacks.push(callback);
+ }
+ };
+
+ /**
+ * Whether a value is a valid event type - non-empty string or array.
+ *
+ * @private
+ * @param {string|Array} type
+ * The type value to test.
+ *
+ * @return {boolean}
+ * Whether or not the type is a valid event type.
+ */
+ const isValidEventType = type =>
+ // The regex here verifies that the `type` contains at least one non-
+ // whitespace character.
+ typeof type === 'string' && /\S/.test(type) || Array.isArray(type) && !!type.length;
+
+ /**
+ * Validates a value to determine if it is a valid event target. Throws if not.
+ *
+ * @private
+ * @throws {Error}
+ * If the target does not appear to be a valid event target.
+ *
+ * @param {Object} target
+ * The object to test.
+ *
+ * @param {Object} obj
+ * The evented object we are validating for
+ *
+ * @param {string} fnName
+ * The name of the evented mixin function that called this.
+ */
+ const validateTarget = (target, obj, fnName) => {
+ if (!target || !target.nodeName && !isEvented(target)) {
+ throw new Error(`Invalid target for ${objName(obj)}#${fnName}; must be a DOM node or evented object.`);
+ }
+ };
+
+ /**
+ * Validates a value to determine if it is a valid event target. Throws if not.
+ *
+ * @private
+ * @throws {Error}
+ * If the type does not appear to be a valid event type.
+ *
+ * @param {string|Array} type
+ * The type to test.
+ *
+ * @param {Object} obj
+ * The evented object we are validating for
+ *
+ * @param {string} fnName
+ * The name of the evented mixin function that called this.
+ */
+ const validateEventType = (type, obj, fnName) => {
+ if (!isValidEventType(type)) {
+ throw new Error(`Invalid event type for ${objName(obj)}#${fnName}; must be a non-empty string or array.`);
+ }
+ };
+
+ /**
+ * Validates a value to determine if it is a valid listener. Throws if not.
+ *
+ * @private
+ * @throws {Error}
+ * If the listener is not a function.
+ *
+ * @param {Function} listener
+ * The listener to test.
+ *
+ * @param {Object} obj
+ * The evented object we are validating for
+ *
+ * @param {string} fnName
+ * The name of the evented mixin function that called this.
+ */
+ const validateListener = (listener, obj, fnName) => {
+ if (typeof listener !== 'function') {
+ throw new Error(`Invalid listener for ${objName(obj)}#${fnName}; must be a function.`);
+ }
+ };
+
+ /**
+ * Takes an array of arguments given to `on()` or `one()`, validates them, and
+ * normalizes them into an object.
+ *
+ * @private
+ * @param {Object} self
+ * The evented object on which `on()` or `one()` was called. This
+ * object will be bound as the `this` value for the listener.
+ *
+ * @param {Array} args
+ * An array of arguments passed to `on()` or `one()`.
+ *
+ * @param {string} fnName
+ * The name of the evented mixin function that called this.
+ *
+ * @return {Object}
+ * An object containing useful values for `on()` or `one()` calls.
+ */
+ const normalizeListenArgs = (self, args, fnName) => {
+ // If the number of arguments is less than 3, the target is always the
+ // evented object itself.
+ const isTargetingSelf = args.length < 3 || args[0] === self || args[0] === self.eventBusEl_;
+ let target;
+ let type;
+ let listener;
+ if (isTargetingSelf) {
+ target = self.eventBusEl_;
+
+ // Deal with cases where we got 3 arguments, but we are still listening to
+ // the evented object itself.
+ if (args.length >= 3) {
+ args.shift();
+ }
+ [type, listener] = args;
+ } else {
+ [target, type, listener] = args;
+ }
+ validateTarget(target, self, fnName);
+ validateEventType(type, self, fnName);
+ validateListener(listener, self, fnName);
+ listener = bind_(self, listener);
+ return {
+ isTargetingSelf,
+ target,
+ type,
+ listener
+ };
+ };
+
+ /**
+ * Adds the listener to the event type(s) on the target, normalizing for
+ * the type of target.
+ *
+ * @private
+ * @param {Element|Object} target
+ * A DOM node or evented object.
+ *
+ * @param {string} method
+ * The event binding method to use ("on" or "one").
+ *
+ * @param {string|Array} type
+ * One or more event type(s).
+ *
+ * @param {Function} listener
+ * A listener function.
+ */
+ const listen = (target, method, type, listener) => {
+ validateTarget(target, target, method);
+ if (target.nodeName) {
+ Events[method](target, type, listener);
+ } else {
+ target[method](type, listener);
+ }
+ };
+
+ /**
+ * Contains methods that provide event capabilities to an object which is passed
+ * to {@link module:evented|evented}.
+ *
+ * @mixin EventedMixin
+ */
+ const EventedMixin = {
+ /**
+ * Add a listener to an event (or events) on this object or another evented
+ * object.
+ *
+ * @param {string|Array|Element|Object} targetOrType
+ * If this is a string or array, it represents the event type(s)
+ * that will trigger the listener.
+ *
+ * Another evented object can be passed here instead, which will
+ * cause the listener to listen for events on _that_ object.
+ *
+ * In either case, the listener's `this` value will be bound to
+ * this object.
+ *
+ * @param {string|Array|Function} typeOrListener
+ * If the first argument was a string or array, this should be the
+ * listener function. Otherwise, this is a string or array of event
+ * type(s).
+ *
+ * @param {Function} [listener]
+ * If the first argument was another evented object, this will be
+ * the listener function.
+ */
+ on(...args) {
+ const {
+ isTargetingSelf,
+ target,
+ type,
+ listener
+ } = normalizeListenArgs(this, args, 'on');
+ listen(target, 'on', type, listener);
+
+ // If this object is listening to another evented object.
+ if (!isTargetingSelf) {
+ // If this object is disposed, remove the listener.
+ const removeListenerOnDispose = () => this.off(target, type, listener);
+
+ // Use the same function ID as the listener so we can remove it later it
+ // using the ID of the original listener.
+ removeListenerOnDispose.guid = listener.guid;
+
+ // Add a listener to the target's dispose event as well. This ensures
+ // that if the target is disposed BEFORE this object, we remove the
+ // removal listener that was just added. Otherwise, we create a memory leak.
+ const removeRemoverOnTargetDispose = () => this.off('dispose', removeListenerOnDispose);
+
+ // Use the same function ID as the listener so we can remove it later
+ // it using the ID of the original listener.
+ removeRemoverOnTargetDispose.guid = listener.guid;
+ listen(this, 'on', 'dispose', removeListenerOnDispose);
+ listen(target, 'on', 'dispose', removeRemoverOnTargetDispose);
+ }
+ },
+ /**
+ * Add a listener to an event (or events) on this object or another evented
+ * object. The listener will be called once per event and then removed.
+ *
+ * @param {string|Array|Element|Object} targetOrType
+ * If this is a string or array, it represents the event type(s)
+ * that will trigger the listener.
+ *
+ * Another evented object can be passed here instead, which will
+ * cause the listener to listen for events on _that_ object.
+ *
+ * In either case, the listener's `this` value will be bound to
+ * this object.
+ *
+ * @param {string|Array|Function} typeOrListener
+ * If the first argument was a string or array, this should be the
+ * listener function. Otherwise, this is a string or array of event
+ * type(s).
+ *
+ * @param {Function} [listener]
+ * If the first argument was another evented object, this will be
+ * the listener function.
+ */
+ one(...args) {
+ const {
+ isTargetingSelf,
+ target,
+ type,
+ listener
+ } = normalizeListenArgs(this, args, 'one');
+
+ // Targeting this evented object.
+ if (isTargetingSelf) {
+ listen(target, 'one', type, listener);
+
+ // Targeting another evented object.
+ } else {
+ // TODO: This wrapper is incorrect! It should only
+ // remove the wrapper for the event type that called it.
+ // Instead all listeners are removed on the first trigger!
+ // see https://github.com/videojs/video.js/issues/5962
+ const wrapper = (...largs) => {
+ this.off(target, type, wrapper);
+ listener.apply(null, largs);
+ };
+
+ // Use the same function ID as the listener so we can remove it later
+ // it using the ID of the original listener.
+ wrapper.guid = listener.guid;
+ listen(target, 'one', type, wrapper);
+ }
+ },
+ /**
+ * Add a listener to an event (or events) on this object or another evented
+ * object. The listener will only be called once for the first event that is triggered
+ * then removed.
+ *
+ * @param {string|Array|Element|Object} targetOrType
+ * If this is a string or array, it represents the event type(s)
+ * that will trigger the listener.
+ *
+ * Another evented object can be passed here instead, which will
+ * cause the listener to listen for events on _that_ object.
+ *
+ * In either case, the listener's `this` value will be bound to
+ * this object.
+ *
+ * @param {string|Array|Function} typeOrListener
+ * If the first argument was a string or array, this should be the
+ * listener function. Otherwise, this is a string or array of event
+ * type(s).
+ *
+ * @param {Function} [listener]
+ * If the first argument was another evented object, this will be
+ * the listener function.
+ */
+ any(...args) {
+ const {
+ isTargetingSelf,
+ target,
+ type,
+ listener
+ } = normalizeListenArgs(this, args, 'any');
+
+ // Targeting this evented object.
+ if (isTargetingSelf) {
+ listen(target, 'any', type, listener);
+
+ // Targeting another evented object.
+ } else {
+ const wrapper = (...largs) => {
+ this.off(target, type, wrapper);
+ listener.apply(null, largs);
+ };
+
+ // Use the same function ID as the listener so we can remove it later
+ // it using the ID of the original listener.
+ wrapper.guid = listener.guid;
+ listen(target, 'any', type, wrapper);
+ }
+ },
+ /**
+ * Removes listener(s) from event(s) on an evented object.
+ *
+ * @param {string|Array|Element|Object} [targetOrType]
+ * If this is a string or array, it represents the event type(s).
+ *
+ * Another evented object can be passed here instead, in which case
+ * ALL 3 arguments are _required_.
+ *
+ * @param {string|Array|Function} [typeOrListener]
+ * If the first argument was a string or array, this may be the
+ * listener function. Otherwise, this is a string or array of event
+ * type(s).
+ *
+ * @param {Function} [listener]
+ * If the first argument was another evented object, this will be
+ * the listener function; otherwise, _all_ listeners bound to the
+ * event type(s) will be removed.
+ */
+ off(targetOrType, typeOrListener, listener) {
+ // Targeting this evented object.
+ if (!targetOrType || isValidEventType(targetOrType)) {
+ off(this.eventBusEl_, targetOrType, typeOrListener);
+
+ // Targeting another evented object.
+ } else {
+ const target = targetOrType;
+ const type = typeOrListener;
+
+ // Fail fast and in a meaningful way!
+ validateTarget(target, this, 'off');
+ validateEventType(type, this, 'off');
+ validateListener(listener, this, 'off');
+
+ // Ensure there's at least a guid, even if the function hasn't been used
+ listener = bind_(this, listener);
+
+ // Remove the dispose listener on this evented object, which was given
+ // the same guid as the event listener in on().
+ this.off('dispose', listener);
+ if (target.nodeName) {
+ off(target, type, listener);
+ off(target, 'dispose', listener);
+ } else if (isEvented(target)) {
+ target.off(type, listener);
+ target.off('dispose', listener);
+ }
+ }
+ },
+ /**
+ * Fire an event on this evented object, causing its listeners to be called.
+ *
+ * @param {string|Object} event
+ * An event type or an object with a type property.
+ *
+ * @param {Object} [hash]
+ * An additional object to pass along to listeners.
+ *
+ * @return {boolean}
+ * Whether or not the default behavior was prevented.
+ */
+ trigger(event, hash) {
+ validateTarget(this.eventBusEl_, this, 'trigger');
+ const type = event && typeof event !== 'string' ? event.type : event;
+ if (!isValidEventType(type)) {
+ throw new Error(`Invalid event type for ${objName(this)}#trigger; ` + 'must be a non-empty string or object with a type key that has a non-empty value.');
+ }
+ return trigger(this.eventBusEl_, event, hash);
+ }
+ };
+
+ /**
+ * Applies {@link module:evented~EventedMixin|EventedMixin} to a target object.
+ *
+ * @param {Object} target
+ * The object to which to add event methods.
+ *
+ * @param {Object} [options={}]
+ * Options for customizing the mixin behavior.
+ *
+ * @param {string} [options.eventBusKey]
+ * By default, adds a `eventBusEl_` DOM element to the target object,
+ * which is used as an event bus. If the target object already has a
+ * DOM element that should be used, pass its key here.
+ *
+ * @return {Object}
+ * The target object.
+ */
+ function evented(target, options = {}) {
+ const {
+ eventBusKey
+ } = options;
+
+ // Set or create the eventBusEl_.
+ if (eventBusKey) {
+ if (!target[eventBusKey].nodeName) {
+ throw new Error(`The eventBusKey "${eventBusKey}" does not refer to an element.`);
+ }
+ target.eventBusEl_ = target[eventBusKey];
+ } else {
+ target.eventBusEl_ = createEl('span', {
+ className: 'vjs-event-bus'
+ });
+ }
+ Object.assign(target, EventedMixin);
+ if (target.eventedCallbacks) {
+ target.eventedCallbacks.forEach(callback => {
+ callback();
+ });
+ }
+
+ // When any evented object is disposed, it removes all its listeners.
+ target.on('dispose', () => {
+ target.off();
+ [target, target.el_, target.eventBusEl_].forEach(function (val) {
+ if (val && DomData.has(val)) {
+ DomData.delete(val);
+ }
+ });
+ window.setTimeout(() => {
+ target.eventBusEl_ = null;
+ }, 0);
+ });
+ return target;
+ }
+
+ /**
+ * @file mixins/stateful.js
+ * @module stateful
+ */
+
+ /**
+ * Contains methods that provide statefulness to an object which is passed
+ * to {@link module:stateful}.
+ *
+ * @mixin StatefulMixin
+ */
+ const StatefulMixin = {
+ /**
+ * A hash containing arbitrary keys and values representing the state of
+ * the object.
+ *
+ * @type {Object}
+ */
+ state: {},
+ /**
+ * Set the state of an object by mutating its
+ * {@link module:stateful~StatefulMixin.state|state} object in place.
+ *
+ * @fires module:stateful~StatefulMixin#statechanged
+ * @param {Object|Function} stateUpdates
+ * A new set of properties to shallow-merge into the plugin state.
+ * Can be a plain object or a function returning a plain object.
+ *
+ * @return {Object|undefined}
+ * An object containing changes that occurred. If no changes
+ * occurred, returns `undefined`.
+ */
+ setState(stateUpdates) {
+ // Support providing the `stateUpdates` state as a function.
+ if (typeof stateUpdates === 'function') {
+ stateUpdates = stateUpdates();
+ }
+ let changes;
+ each(stateUpdates, (value, key) => {
+ // Record the change if the value is different from what's in the
+ // current state.
+ if (this.state[key] !== value) {
+ changes = changes || {};
+ changes[key] = {
+ from: this.state[key],
+ to: value
+ };
+ }
+ this.state[key] = value;
+ });
+
+ // Only trigger "statechange" if there were changes AND we have a trigger
+ // function. This allows us to not require that the target object be an
+ // evented object.
+ if (changes && isEvented(this)) {
+ /**
+ * An event triggered on an object that is both
+ * {@link module:stateful|stateful} and {@link module:evented|evented}
+ * indicating that its state has changed.
+ *
+ * @event module:stateful~StatefulMixin#statechanged
+ * @type {Object}
+ * @property {Object} changes
+ * A hash containing the properties that were changed and
+ * the values they were changed `from` and `to`.
+ */
+ this.trigger({
+ changes,
+ type: 'statechanged'
+ });
+ }
+ return changes;
+ }
+ };
+
+ /**
+ * Applies {@link module:stateful~StatefulMixin|StatefulMixin} to a target
+ * object.
+ *
+ * If the target object is {@link module:evented|evented} and has a
+ * `handleStateChanged` method, that method will be automatically bound to the
+ * `statechanged` event on itself.
+ *
+ * @param {Object} target
+ * The object to be made stateful.
+ *
+ * @param {Object} [defaultState]
+ * A default set of properties to populate the newly-stateful object's
+ * `state` property.
+ *
+ * @return {Object}
+ * Returns the `target`.
+ */
+ function stateful(target, defaultState) {
+ Object.assign(target, StatefulMixin);
+
+ // This happens after the mixing-in because we need to replace the `state`
+ // added in that step.
+ target.state = Object.assign({}, target.state, defaultState);
+
+ // Auto-bind the `handleStateChanged` method of the target object if it exists.
+ if (typeof target.handleStateChanged === 'function' && isEvented(target)) {
+ target.on('statechanged', target.handleStateChanged);
+ }
+ return target;
+ }
+
+ /**
+ * @file str.js
+ * @module to-lower-case
+ */
+
+ /**
+ * Lowercase the first letter of a string.
+ *
+ * @param {string} string
+ * String to be lowercased
+ *
+ * @return {string}
+ * The string with a lowercased first letter
+ */
+ const toLowerCase = function (string) {
+ if (typeof string !== 'string') {
+ return string;
+ }
+ return string.replace(/./, w => w.toLowerCase());
+ };
+
+ /**
+ * Uppercase the first letter of a string.
+ *
+ * @param {string} string
+ * String to be uppercased
+ *
+ * @return {string}
+ * The string with an uppercased first letter
+ */
+ const toTitleCase$1 = function (string) {
+ if (typeof string !== 'string') {
+ return string;
+ }
+ return string.replace(/./, w => w.toUpperCase());
+ };
+
+ /**
+ * Compares the TitleCase versions of the two strings for equality.
+ *
+ * @param {string} str1
+ * The first string to compare
+ *
+ * @param {string} str2
+ * The second string to compare
+ *
+ * @return {boolean}
+ * Whether the TitleCase versions of the strings are equal
+ */
+ const titleCaseEquals = function (str1, str2) {
+ return toTitleCase$1(str1) === toTitleCase$1(str2);
+ };
+
+ var Str = /*#__PURE__*/Object.freeze({
+ __proto__: null,
+ toLowerCase: toLowerCase,
+ toTitleCase: toTitleCase$1,
+ titleCaseEquals: titleCaseEquals
+ });
+
+ var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};
+
+ function unwrapExports (x) {
+ return x && x.__esModule && Object.prototype.hasOwnProperty.call(x, 'default') ? x['default'] : x;
+ }
+
+ function createCommonjsModule(fn, module) {
+ return module = { exports: {} }, fn(module, module.exports), module.exports;
+ }
+
+ var keycode = createCommonjsModule(function (module, exports) {
+ // Source: http://jsfiddle.net/vWx8V/
+ // http://stackoverflow.com/questions/5603195/full-list-of-javascript-keycodes
+
+ /**
+ * Conenience method returns corresponding value for given keyName or keyCode.
+ *
+ * @param {Mixed} keyCode {Number} or keyName {String}
+ * @return {Mixed}
+ * @api public
+ */
+
+ function keyCode(searchInput) {
+ // Keyboard Events
+ if (searchInput && 'object' === typeof searchInput) {
+ var hasKeyCode = searchInput.which || searchInput.keyCode || searchInput.charCode;
+ if (hasKeyCode) searchInput = hasKeyCode;
+ }
+
+ // Numbers
+ if ('number' === typeof searchInput) return names[searchInput];
+
+ // Everything else (cast to string)
+ var search = String(searchInput);
+
+ // check codes
+ var foundNamedKey = codes[search.toLowerCase()];
+ if (foundNamedKey) return foundNamedKey;
+
+ // check aliases
+ var foundNamedKey = aliases[search.toLowerCase()];
+ if (foundNamedKey) return foundNamedKey;
+
+ // weird character?
+ if (search.length === 1) return search.charCodeAt(0);
+ return undefined;
+ }
+
+ /**
+ * Compares a keyboard event with a given keyCode or keyName.
+ *
+ * @param {Event} event Keyboard event that should be tested
+ * @param {Mixed} keyCode {Number} or keyName {String}
+ * @return {Boolean}
+ * @api public
+ */
+ keyCode.isEventKey = function isEventKey(event, nameOrCode) {
+ if (event && 'object' === typeof event) {
+ var keyCode = event.which || event.keyCode || event.charCode;
+ if (keyCode === null || keyCode === undefined) {
+ return false;
+ }
+ if (typeof nameOrCode === 'string') {
+ // check codes
+ var foundNamedKey = codes[nameOrCode.toLowerCase()];
+ if (foundNamedKey) {
+ return foundNamedKey === keyCode;
+ }
+
+ // check aliases
+ var foundNamedKey = aliases[nameOrCode.toLowerCase()];
+ if (foundNamedKey) {
+ return foundNamedKey === keyCode;
+ }
+ } else if (typeof nameOrCode === 'number') {
+ return nameOrCode === keyCode;
+ }
+ return false;
+ }
+ };
+ exports = module.exports = keyCode;
+
+ /**
+ * Get by name
+ *
+ * exports.code['enter'] // => 13
+ */
+
+ var codes = exports.code = exports.codes = {
+ 'backspace': 8,
+ 'tab': 9,
+ 'enter': 13,
+ 'shift': 16,
+ 'ctrl': 17,
+ 'alt': 18,
+ 'pause/break': 19,
+ 'caps lock': 20,
+ 'esc': 27,
+ 'space': 32,
+ 'page up': 33,
+ 'page down': 34,
+ 'end': 35,
+ 'home': 36,
+ 'left': 37,
+ 'up': 38,
+ 'right': 39,
+ 'down': 40,
+ 'insert': 45,
+ 'delete': 46,
+ 'command': 91,
+ 'left command': 91,
+ 'right command': 93,
+ 'numpad *': 106,
+ 'numpad +': 107,
+ 'numpad -': 109,
+ 'numpad .': 110,
+ 'numpad /': 111,
+ 'num lock': 144,
+ 'scroll lock': 145,
+ 'my computer': 182,
+ 'my calculator': 183,
+ ';': 186,
+ '=': 187,
+ ',': 188,
+ '-': 189,
+ '.': 190,
+ '/': 191,
+ '`': 192,
+ '[': 219,
+ '\\': 220,
+ ']': 221,
+ "'": 222
+ };
+
+ // Helper aliases
+
+ var aliases = exports.aliases = {
+ 'windows': 91,
+ '⇧': 16,
+ '⌥': 18,
+ '⌃': 17,
+ '⌘': 91,
+ 'ctl': 17,
+ 'control': 17,
+ 'option': 18,
+ 'pause': 19,
+ 'break': 19,
+ 'caps': 20,
+ 'return': 13,
+ 'escape': 27,
+ 'spc': 32,
+ 'spacebar': 32,
+ 'pgup': 33,
+ 'pgdn': 34,
+ 'ins': 45,
+ 'del': 46,
+ 'cmd': 91
+ };
+
+ /*!
+ * Programatically add the following
+ */
+
+ // lower case chars
+ for (i = 97; i < 123; i++) codes[String.fromCharCode(i)] = i - 32;
+
+ // numbers
+ for (var i = 48; i < 58; i++) codes[i - 48] = i;
+
+ // function keys
+ for (i = 1; i < 13; i++) codes['f' + i] = i + 111;
+
+ // numpad keys
+ for (i = 0; i < 10; i++) codes['numpad ' + i] = i + 96;
+
+ /**
+ * Get by code
+ *
+ * exports.name[13] // => 'Enter'
+ */
+
+ var names = exports.names = exports.title = {}; // title for backward compat
+
+ // Create reverse mapping
+ for (i in codes) names[codes[i]] = i;
+
+ // Add aliases
+ for (var alias in aliases) {
+ codes[alias] = aliases[alias];
+ }
+ });
+ keycode.code;
+ keycode.codes;
+ keycode.aliases;
+ keycode.names;
+ keycode.title;
+
+ /**
+ * Player Component - Base class for all UI objects
+ *
+ * @file component.js
+ */
+
+ /**
+ * Base class for all UI Components.
+ * Components are UI objects which represent both a javascript object and an element
+ * in the DOM. They can be children of other components, and can have
+ * children themselves.
+ *
+ * Components can also use methods from {@link EventTarget}
+ */
+ class Component$1 {
+ /**
+ * A callback that is called when a component is ready. Does not have any
+ * parameters and any callback value will be ignored.
+ *
+ * @callback ReadyCallback
+ * @this Component
+ */
+
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('./player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of component options.
+ *
+ * @param {Object[]} [options.children]
+ * An array of children objects to initialize this component with. Children objects have
+ * a name property that will be used if more than one component of the same type needs to be
+ * added.
+ *
+ * @param {string} [options.className]
+ * A class or space separated list of classes to add the component
+ *
+ * @param {ReadyCallback} [ready]
+ * Function that gets called when the `Component` is ready.
+ */
+ constructor(player, options, ready) {
+ // The component might be the player itself and we can't pass `this` to super
+ if (!player && this.play) {
+ this.player_ = player = this; // eslint-disable-line
+ } else {
+ this.player_ = player;
+ }
+ this.isDisposed_ = false;
+
+ // Hold the reference to the parent component via `addChild` method
+ this.parentComponent_ = null;
+
+ // Make a copy of prototype.options_ to protect against overriding defaults
+ this.options_ = merge$2({}, this.options_);
+
+ // Updated options with supplied options
+ options = this.options_ = merge$2(this.options_, options);
+
+ // Get ID from options or options element if one is supplied
+ this.id_ = options.id || options.el && options.el.id;
+
+ // If there was no ID from the options, generate one
+ if (!this.id_) {
+ // Don't require the player ID function in the case of mock players
+ const id = player && player.id && player.id() || 'no_player';
+ this.id_ = `${id}_component_${newGUID()}`;
+ }
+ this.name_ = options.name || null;
+
+ // Create element if one wasn't provided in options
+ if (options.el) {
+ this.el_ = options.el;
+ } else if (options.createEl !== false) {
+ this.el_ = this.createEl();
+ }
+ if (options.className && this.el_) {
+ options.className.split(' ').forEach(c => this.addClass(c));
+ }
+
+ // Remove the placeholder event methods. If the component is evented, the
+ // real methods are added next
+ ['on', 'off', 'one', 'any', 'trigger'].forEach(fn => {
+ this[fn] = undefined;
+ });
+
+ // if evented is anything except false, we want to mixin in evented
+ if (options.evented !== false) {
+ // Make this an evented object and use `el_`, if available, as its event bus
+ evented(this, {
+ eventBusKey: this.el_ ? 'el_' : null
+ });
+ this.handleLanguagechange = this.handleLanguagechange.bind(this);
+ this.on(this.player_, 'languagechange', this.handleLanguagechange);
+ }
+ stateful(this, this.constructor.defaultState);
+ this.children_ = [];
+ this.childIndex_ = {};
+ this.childNameIndex_ = {};
+ this.setTimeoutIds_ = new Set();
+ this.setIntervalIds_ = new Set();
+ this.rafIds_ = new Set();
+ this.namedRafs_ = new Map();
+ this.clearingTimersOnDispose_ = false;
+
+ // Add any child components in options
+ if (options.initChildren !== false) {
+ this.initChildren();
+ }
+
+ // Don't want to trigger ready here or it will go before init is actually
+ // finished for all children that run this constructor
+ this.ready(ready);
+ if (options.reportTouchActivity !== false) {
+ this.enableTouchActivity();
+ }
+ }
+
+ // `on`, `off`, `one`, `any` and `trigger` are here so tsc includes them in definitions.
+ // They are replaced or removed in the constructor
+
+ /**
+ * Adds an `event listener` to an instance of an `EventTarget`. An `event listener` is a
+ * function that will get called when an event with a certain name gets triggered.
+ *
+ * @param {string|string[]} type
+ * An event name or an array of event names.
+ *
+ * @param {Function} fn
+ * The function to call with `EventTarget`s
+ */
+ on(type, fn) {}
+
+ /**
+ * Removes an `event listener` for a specific event from an instance of `EventTarget`.
+ * This makes it so that the `event listener` will no longer get called when the
+ * named event happens.
+ *
+ * @param {string|string[]} type
+ * An event name or an array of event names.
+ *
+ * @param {Function} [fn]
+ * The function to remove. If not specified, all listeners managed by Video.js will be removed.
+ */
+ off(type, fn) {}
+
+ /**
+ * This function will add an `event listener` that gets triggered only once. After the
+ * first trigger it will get removed. This is like adding an `event listener`
+ * with {@link EventTarget#on} that calls {@link EventTarget#off} on itself.
+ *
+ * @param {string|string[]} type
+ * An event name or an array of event names.
+ *
+ * @param {Function} fn
+ * The function to be called once for each event name.
+ */
+ one(type, fn) {}
+
+ /**
+ * This function will add an `event listener` that gets triggered only once and is
+ * removed from all events. This is like adding an array of `event listener`s
+ * with {@link EventTarget#on} that calls {@link EventTarget#off} on all events the
+ * first time it is triggered.
+ *
+ * @param {string|string[]} type
+ * An event name or an array of event names.
+ *
+ * @param {Function} fn
+ * The function to be called once for each event name.
+ */
+ any(type, fn) {}
+
+ /**
+ * This function causes an event to happen. This will then cause any `event listeners`
+ * that are waiting for that event, to get called. If there are no `event listeners`
+ * for an event then nothing will happen.
+ *
+ * If the name of the `Event` that is being triggered is in `EventTarget.allowedEvents_`.
+ * Trigger will also call the `on` + `uppercaseEventName` function.
+ *
+ * Example:
+ * 'click' is in `EventTarget.allowedEvents_`, so, trigger will attempt to call
+ * `onClick` if it exists.
+ *
+ * @param {string|Event|Object} event
+ * The name of the event, an `Event`, or an object with a key of type set to
+ * an event name.
+ *
+ * @param {Object} [hash]
+ * Optionally extra argument to pass through to an event listener
+ */
+ trigger(event, hash) {}
+
+ /**
+ * Dispose of the `Component` and all child components.
+ *
+ * @fires Component#dispose
+ *
+ * @param {Object} options
+ * @param {Element} options.originalEl element with which to replace player element
+ */
+ dispose(options = {}) {
+ // Bail out if the component has already been disposed.
+ if (this.isDisposed_) {
+ return;
+ }
+ if (this.readyQueue_) {
+ this.readyQueue_.length = 0;
+ }
+
+ /**
+ * Triggered when a `Component` is disposed.
+ *
+ * @event Component#dispose
+ * @type {Event}
+ *
+ * @property {boolean} [bubbles=false]
+ * set to false so that the dispose event does not
+ * bubble up
+ */
+ this.trigger({
+ type: 'dispose',
+ bubbles: false
+ });
+ this.isDisposed_ = true;
+
+ // Dispose all children.
+ if (this.children_) {
+ for (let i = this.children_.length - 1; i >= 0; i--) {
+ if (this.children_[i].dispose) {
+ this.children_[i].dispose();
+ }
+ }
+ }
+
+ // Delete child references
+ this.children_ = null;
+ this.childIndex_ = null;
+ this.childNameIndex_ = null;
+ this.parentComponent_ = null;
+ if (this.el_) {
+ // Remove element from DOM
+ if (this.el_.parentNode) {
+ if (options.restoreEl) {
+ this.el_.parentNode.replaceChild(options.restoreEl, this.el_);
+ } else {
+ this.el_.parentNode.removeChild(this.el_);
+ }
+ }
+ this.el_ = null;
+ }
+
+ // remove reference to the player after disposing of the element
+ this.player_ = null;
+ }
+
+ /**
+ * Determine whether or not this component has been disposed.
+ *
+ * @return {boolean}
+ * If the component has been disposed, will be `true`. Otherwise, `false`.
+ */
+ isDisposed() {
+ return Boolean(this.isDisposed_);
+ }
+
+ /**
+ * Return the {@link Player} that the `Component` has attached to.
+ *
+ * @return { import('./player').default }
+ * The player that this `Component` has attached to.
+ */
+ player() {
+ return this.player_;
+ }
+
+ /**
+ * Deep merge of options objects with new options.
+ * > Note: When both `obj` and `options` contain properties whose values are objects.
+ * The two properties get merged using {@link module:obj.merge}
+ *
+ * @param {Object} obj
+ * The object that contains new options.
+ *
+ * @return {Object}
+ * A new object of `this.options_` and `obj` merged together.
+ */
+ options(obj) {
+ if (!obj) {
+ return this.options_;
+ }
+ this.options_ = merge$2(this.options_, obj);
+ return this.options_;
+ }
+
+ /**
+ * Get the `Component`s DOM element
+ *
+ * @return {Element}
+ * The DOM element for this `Component`.
+ */
+ el() {
+ return this.el_;
+ }
+
+ /**
+ * Create the `Component`s DOM element.
+ *
+ * @param {string} [tagName]
+ * Element's DOM node type. e.g. 'div'
+ *
+ * @param {Object} [properties]
+ * An object of properties that should be set.
+ *
+ * @param {Object} [attributes]
+ * An object of attributes that should be set.
+ *
+ * @return {Element}
+ * The element that gets created.
+ */
+ createEl(tagName, properties, attributes) {
+ return createEl(tagName, properties, attributes);
+ }
+
+ /**
+ * Localize a string given the string in english.
+ *
+ * If tokens are provided, it'll try and run a simple token replacement on the provided string.
+ * The tokens it looks for look like `{1}` with the index being 1-indexed into the tokens array.
+ *
+ * If a `defaultValue` is provided, it'll use that over `string`,
+ * if a value isn't found in provided language files.
+ * This is useful if you want to have a descriptive key for token replacement
+ * but have a succinct localized string and not require `en.json` to be included.
+ *
+ * Currently, it is used for the progress bar timing.
+ * ```js
+ * {
+ * "progress bar timing: currentTime={1} duration={2}": "{1} of {2}"
+ * }
+ * ```
+ * It is then used like so:
+ * ```js
+ * this.localize('progress bar timing: currentTime={1} duration{2}',
+ * [this.player_.currentTime(), this.player_.duration()],
+ * '{1} of {2}');
+ * ```
+ *
+ * Which outputs something like: `01:23 of 24:56`.
+ *
+ *
+ * @param {string} string
+ * The string to localize and the key to lookup in the language files.
+ * @param {string[]} [tokens]
+ * If the current item has token replacements, provide the tokens here.
+ * @param {string} [defaultValue]
+ * Defaults to `string`. Can be a default value to use for token replacement
+ * if the lookup key is needed to be separate.
+ *
+ * @return {string}
+ * The localized string or if no localization exists the english string.
+ */
+ localize(string, tokens, defaultValue = string) {
+ const code = this.player_.language && this.player_.language();
+ const languages = this.player_.languages && this.player_.languages();
+ const language = languages && languages[code];
+ const primaryCode = code && code.split('-')[0];
+ const primaryLang = languages && languages[primaryCode];
+ let localizedString = defaultValue;
+ if (language && language[string]) {
+ localizedString = language[string];
+ } else if (primaryLang && primaryLang[string]) {
+ localizedString = primaryLang[string];
+ }
+ if (tokens) {
+ localizedString = localizedString.replace(/\{(\d+)\}/g, function (match, index) {
+ const value = tokens[index - 1];
+ let ret = value;
+ if (typeof value === 'undefined') {
+ ret = match;
+ }
+ return ret;
+ });
+ }
+ return localizedString;
+ }
+
+ /**
+ * Handles language change for the player in components. Should be overridden by sub-components.
+ *
+ * @abstract
+ */
+ handleLanguagechange() {}
+
+ /**
+ * Return the `Component`s DOM element. This is where children get inserted.
+ * This will usually be the the same as the element returned in {@link Component#el}.
+ *
+ * @return {Element}
+ * The content element for this `Component`.
+ */
+ contentEl() {
+ return this.contentEl_ || this.el_;
+ }
+
+ /**
+ * Get this `Component`s ID
+ *
+ * @return {string}
+ * The id of this `Component`
+ */
+ id() {
+ return this.id_;
+ }
+
+ /**
+ * Get the `Component`s name. The name gets used to reference the `Component`
+ * and is set during registration.
+ *
+ * @return {string}
+ * The name of this `Component`.
+ */
+ name() {
+ return this.name_;
+ }
+
+ /**
+ * Get an array of all child components
+ *
+ * @return {Array}
+ * The children
+ */
+ children() {
+ return this.children_;
+ }
+
+ /**
+ * Returns the child `Component` with the given `id`.
+ *
+ * @param {string} id
+ * The id of the child `Component` to get.
+ *
+ * @return {Component|undefined}
+ * The child `Component` with the given `id` or undefined.
+ */
+ getChildById(id) {
+ return this.childIndex_[id];
+ }
+
+ /**
+ * Returns the child `Component` with the given `name`.
+ *
+ * @param {string} name
+ * The name of the child `Component` to get.
+ *
+ * @return {Component|undefined}
+ * The child `Component` with the given `name` or undefined.
+ */
+ getChild(name) {
+ if (!name) {
+ return;
+ }
+ return this.childNameIndex_[name];
+ }
+
+ /**
+ * Returns the descendant `Component` following the givent
+ * descendant `names`. For instance ['foo', 'bar', 'baz'] would
+ * try to get 'foo' on the current component, 'bar' on the 'foo'
+ * component and 'baz' on the 'bar' component and return undefined
+ * if any of those don't exist.
+ *
+ * @param {...string[]|...string} names
+ * The name of the child `Component` to get.
+ *
+ * @return {Component|undefined}
+ * The descendant `Component` following the given descendant
+ * `names` or undefined.
+ */
+ getDescendant(...names) {
+ // flatten array argument into the main array
+ names = names.reduce((acc, n) => acc.concat(n), []);
+ let currentChild = this;
+ for (let i = 0; i < names.length; i++) {
+ currentChild = currentChild.getChild(names[i]);
+ if (!currentChild || !currentChild.getChild) {
+ return;
+ }
+ }
+ return currentChild;
+ }
+
+ /**
+ * Adds an SVG icon element to another element or component.
+ *
+ * @param {string} iconName
+ * The name of icon. A list of all the icon names can be found at 'sandbox/svg-icons.html'
+ *
+ * @param {Element} [el=this.el()]
+ * Element to set the title on. Defaults to the current Component's element.
+ *
+ * @return {Element}
+ * The newly created icon element.
+ */
+ setIcon(iconName, el = this.el()) {
+ // TODO: In v9 of video.js, we will want to remove font icons entirely.
+ // This means this check, as well as the others throughout the code, and
+ // the unecessary CSS for font icons, will need to be removed.
+ // See https://github.com/videojs/video.js/pull/8260 as to which components
+ // need updating.
+ if (!this.player_.options_.experimentalSvgIcons) {
+ return;
+ }
+ const xmlnsURL = 'http://www.w3.org/2000/svg';
+
+ // The below creates an element in the format of:
+ // <span><svg><use>....</use></svg></span>
+ const iconContainer = createEl('span', {
+ className: 'vjs-icon-placeholder vjs-svg-icon'
+ }, {
+ 'aria-hidden': 'true'
+ });
+ const svgEl = document.createElementNS(xmlnsURL, 'svg');
+ svgEl.setAttributeNS(null, 'viewBox', '0 0 512 512');
+ const useEl = document.createElementNS(xmlnsURL, 'use');
+ svgEl.appendChild(useEl);
+ useEl.setAttributeNS(null, 'href', `#vjs-icon-${iconName}`);
+ iconContainer.appendChild(svgEl);
+
+ // Replace a pre-existing icon if one exists.
+ if (this.iconIsSet_) {
+ el.replaceChild(iconContainer, el.querySelector('.vjs-icon-placeholder'));
+ } else {
+ el.appendChild(iconContainer);
+ }
+ this.iconIsSet_ = true;
+ return iconContainer;
+ }
+
+ /**
+ * Add a child `Component` inside the current `Component`.
+ *
+ * @param {string|Component} child
+ * The name or instance of a child to add.
+ *
+ * @param {Object} [options={}]
+ * The key/value store of options that will get passed to children of
+ * the child.
+ *
+ * @param {number} [index=this.children_.length]
+ * The index to attempt to add a child into.
+ *
+ *
+ * @return {Component}
+ * The `Component` that gets added as a child. When using a string the
+ * `Component` will get created by this process.
+ */
+ addChild(child, options = {}, index = this.children_.length) {
+ let component;
+ let componentName;
+
+ // If child is a string, create component with options
+ if (typeof child === 'string') {
+ componentName = toTitleCase$1(child);
+ const componentClassName = options.componentClass || componentName;
+
+ // Set name through options
+ options.name = componentName;
+
+ // Create a new object & element for this controls set
+ // If there's no .player_, this is a player
+ const ComponentClass = Component$1.getComponent(componentClassName);
+ if (!ComponentClass) {
+ throw new Error(`Component ${componentClassName} does not exist`);
+ }
+
+ // data stored directly on the videojs object may be
+ // misidentified as a component to retain
+ // backwards-compatibility with 4.x. check to make sure the
+ // component class can be instantiated.
+ if (typeof ComponentClass !== 'function') {
+ return null;
+ }
+ component = new ComponentClass(this.player_ || this, options);
+
+ // child is a component instance
+ } else {
+ component = child;
+ }
+ if (component.parentComponent_) {
+ component.parentComponent_.removeChild(component);
+ }
+ this.children_.splice(index, 0, component);
+ component.parentComponent_ = this;
+ if (typeof component.id === 'function') {
+ this.childIndex_[component.id()] = component;
+ }
+
+ // If a name wasn't used to create the component, check if we can use the
+ // name function of the component
+ componentName = componentName || component.name && toTitleCase$1(component.name());
+ if (componentName) {
+ this.childNameIndex_[componentName] = component;
+ this.childNameIndex_[toLowerCase(componentName)] = component;
+ }
+
+ // Add the UI object's element to the container div (box)
+ // Having an element is not required
+ if (typeof component.el === 'function' && component.el()) {
+ // If inserting before a component, insert before that component's element
+ let refNode = null;
+ if (this.children_[index + 1]) {
+ // Most children are components, but the video tech is an HTML element
+ if (this.children_[index + 1].el_) {
+ refNode = this.children_[index + 1].el_;
+ } else if (isEl(this.children_[index + 1])) {
+ refNode = this.children_[index + 1];
+ }
+ }
+ this.contentEl().insertBefore(component.el(), refNode);
+ }
+
+ // Return so it can stored on parent object if desired.
+ return component;
+ }
+
+ /**
+ * Remove a child `Component` from this `Component`s list of children. Also removes
+ * the child `Component`s element from this `Component`s element.
+ *
+ * @param {Component} component
+ * The child `Component` to remove.
+ */
+ removeChild(component) {
+ if (typeof component === 'string') {
+ component = this.getChild(component);
+ }
+ if (!component || !this.children_) {
+ return;
+ }
+ let childFound = false;
+ for (let i = this.children_.length - 1; i >= 0; i--) {
+ if (this.children_[i] === component) {
+ childFound = true;
+ this.children_.splice(i, 1);
+ break;
+ }
+ }
+ if (!childFound) {
+ return;
+ }
+ component.parentComponent_ = null;
+ this.childIndex_[component.id()] = null;
+ this.childNameIndex_[toTitleCase$1(component.name())] = null;
+ this.childNameIndex_[toLowerCase(component.name())] = null;
+ const compEl = component.el();
+ if (compEl && compEl.parentNode === this.contentEl()) {
+ this.contentEl().removeChild(component.el());
+ }
+ }
+
+ /**
+ * Add and initialize default child `Component`s based upon options.
+ */
+ initChildren() {
+ const children = this.options_.children;
+ if (children) {
+ // `this` is `parent`
+ const parentOptions = this.options_;
+ const handleAdd = child => {
+ const name = child.name;
+ let opts = child.opts;
+
+ // Allow options for children to be set at the parent options
+ // e.g. videojs(id, { controlBar: false });
+ // instead of videojs(id, { children: { controlBar: false });
+ if (parentOptions[name] !== undefined) {
+ opts = parentOptions[name];
+ }
+
+ // Allow for disabling default components
+ // e.g. options['children']['posterImage'] = false
+ if (opts === false) {
+ return;
+ }
+
+ // Allow options to be passed as a simple boolean if no configuration
+ // is necessary.
+ if (opts === true) {
+ opts = {};
+ }
+
+ // We also want to pass the original player options
+ // to each component as well so they don't need to
+ // reach back into the player for options later.
+ opts.playerOptions = this.options_.playerOptions;
+
+ // Create and add the child component.
+ // Add a direct reference to the child by name on the parent instance.
+ // If two of the same component are used, different names should be supplied
+ // for each
+ const newChild = this.addChild(name, opts);
+ if (newChild) {
+ this[name] = newChild;
+ }
+ };
+
+ // Allow for an array of children details to passed in the options
+ let workingChildren;
+ const Tech = Component$1.getComponent('Tech');
+ if (Array.isArray(children)) {
+ workingChildren = children;
+ } else {
+ workingChildren = Object.keys(children);
+ }
+ workingChildren
+ // children that are in this.options_ but also in workingChildren would
+ // give us extra children we do not want. So, we want to filter them out.
+ .concat(Object.keys(this.options_).filter(function (child) {
+ return !workingChildren.some(function (wchild) {
+ if (typeof wchild === 'string') {
+ return child === wchild;
+ }
+ return child === wchild.name;
+ });
+ })).map(child => {
+ let name;
+ let opts;
+ if (typeof child === 'string') {
+ name = child;
+ opts = children[name] || this.options_[name] || {};
+ } else {
+ name = child.name;
+ opts = child;
+ }
+ return {
+ name,
+ opts
+ };
+ }).filter(child => {
+ // we have to make sure that child.name isn't in the techOrder since
+ // techs are registered as Components but can't aren't compatible
+ // See https://github.com/videojs/video.js/issues/2772
+ const c = Component$1.getComponent(child.opts.componentClass || toTitleCase$1(child.name));
+ return c && !Tech.isTech(c);
+ }).forEach(handleAdd);
+ }
+ }
+
+ /**
+ * Builds the default DOM class name. Should be overridden by sub-components.
+ *
+ * @return {string}
+ * The DOM class name for this object.
+ *
+ * @abstract
+ */
+ buildCSSClass() {
+ // Child classes can include a function that does:
+ // return 'CLASS NAME' + this._super();
+ return '';
+ }
+
+ /**
+ * Bind a listener to the component's ready state.
+ * Different from event listeners in that if the ready event has already happened
+ * it will trigger the function immediately.
+ *
+ * @param {ReadyCallback} fn
+ * Function that gets called when the `Component` is ready.
+ *
+ * @return {Component}
+ * Returns itself; method can be chained.
+ */
+ ready(fn, sync = false) {
+ if (!fn) {
+ return;
+ }
+ if (!this.isReady_) {
+ this.readyQueue_ = this.readyQueue_ || [];
+ this.readyQueue_.push(fn);
+ return;
+ }
+ if (sync) {
+ fn.call(this);
+ } else {
+ // Call the function asynchronously by default for consistency
+ this.setTimeout(fn, 1);
+ }
+ }
+
+ /**
+ * Trigger all the ready listeners for this `Component`.
+ *
+ * @fires Component#ready
+ */
+ triggerReady() {
+ this.isReady_ = true;
+
+ // Ensure ready is triggered asynchronously
+ this.setTimeout(function () {
+ const readyQueue = this.readyQueue_;
+
+ // Reset Ready Queue
+ this.readyQueue_ = [];
+ if (readyQueue && readyQueue.length > 0) {
+ readyQueue.forEach(function (fn) {
+ fn.call(this);
+ }, this);
+ }
+
+ // Allow for using event listeners also
+ /**
+ * Triggered when a `Component` is ready.
+ *
+ * @event Component#ready
+ * @type {Event}
+ */
+ this.trigger('ready');
+ }, 1);
+ }
+
+ /**
+ * Find a single DOM element matching a `selector`. This can be within the `Component`s
+ * `contentEl()` or another custom context.
+ *
+ * @param {string} selector
+ * A valid CSS selector, which will be passed to `querySelector`.
+ *
+ * @param {Element|string} [context=this.contentEl()]
+ * A DOM element within which to query. Can also be a selector string in
+ * which case the first matching element will get used as context. If
+ * missing `this.contentEl()` gets used. If `this.contentEl()` returns
+ * nothing it falls back to `document`.
+ *
+ * @return {Element|null}
+ * the dom element that was found, or null
+ *
+ * @see [Information on CSS Selectors](https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Getting_Started/Selectors)
+ */
+ $(selector, context) {
+ return $(selector, context || this.contentEl());
+ }
+
+ /**
+ * Finds all DOM element matching a `selector`. This can be within the `Component`s
+ * `contentEl()` or another custom context.
+ *
+ * @param {string} selector
+ * A valid CSS selector, which will be passed to `querySelectorAll`.
+ *
+ * @param {Element|string} [context=this.contentEl()]
+ * A DOM element within which to query. Can also be a selector string in
+ * which case the first matching element will get used as context. If
+ * missing `this.contentEl()` gets used. If `this.contentEl()` returns
+ * nothing it falls back to `document`.
+ *
+ * @return {NodeList}
+ * a list of dom elements that were found
+ *
+ * @see [Information on CSS Selectors](https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Getting_Started/Selectors)
+ */
+ $$(selector, context) {
+ return $$(selector, context || this.contentEl());
+ }
+
+ /**
+ * Check if a component's element has a CSS class name.
+ *
+ * @param {string} classToCheck
+ * CSS class name to check.
+ *
+ * @return {boolean}
+ * - True if the `Component` has the class.
+ * - False if the `Component` does not have the class`
+ */
+ hasClass(classToCheck) {
+ return hasClass(this.el_, classToCheck);
+ }
+
+ /**
+ * Add a CSS class name to the `Component`s element.
+ *
+ * @param {...string} classesToAdd
+ * One or more CSS class name to add.
+ */
+ addClass(...classesToAdd) {
+ addClass(this.el_, ...classesToAdd);
+ }
+
+ /**
+ * Remove a CSS class name from the `Component`s element.
+ *
+ * @param {...string} classesToRemove
+ * One or more CSS class name to remove.
+ */
+ removeClass(...classesToRemove) {
+ removeClass(this.el_, ...classesToRemove);
+ }
+
+ /**
+ * Add or remove a CSS class name from the component's element.
+ * - `classToToggle` gets added when {@link Component#hasClass} would return false.
+ * - `classToToggle` gets removed when {@link Component#hasClass} would return true.
+ *
+ * @param {string} classToToggle
+ * The class to add or remove based on (@link Component#hasClass}
+ *
+ * @param {boolean|Dom~predicate} [predicate]
+ * An {@link Dom~predicate} function or a boolean
+ */
+ toggleClass(classToToggle, predicate) {
+ toggleClass(this.el_, classToToggle, predicate);
+ }
+
+ /**
+ * Show the `Component`s element if it is hidden by removing the
+ * 'vjs-hidden' class name from it.
+ */
+ show() {
+ this.removeClass('vjs-hidden');
+ }
+
+ /**
+ * Hide the `Component`s element if it is currently showing by adding the
+ * 'vjs-hidden` class name to it.
+ */
+ hide() {
+ this.addClass('vjs-hidden');
+ }
+
+ /**
+ * Lock a `Component`s element in its visible state by adding the 'vjs-lock-showing'
+ * class name to it. Used during fadeIn/fadeOut.
+ *
+ * @private
+ */
+ lockShowing() {
+ this.addClass('vjs-lock-showing');
+ }
+
+ /**
+ * Unlock a `Component`s element from its visible state by removing the 'vjs-lock-showing'
+ * class name from it. Used during fadeIn/fadeOut.
+ *
+ * @private
+ */
+ unlockShowing() {
+ this.removeClass('vjs-lock-showing');
+ }
+
+ /**
+ * Get the value of an attribute on the `Component`s element.
+ *
+ * @param {string} attribute
+ * Name of the attribute to get the value from.
+ *
+ * @return {string|null}
+ * - The value of the attribute that was asked for.
+ * - Can be an empty string on some browsers if the attribute does not exist
+ * or has no value
+ * - Most browsers will return null if the attribute does not exist or has
+ * no value.
+ *
+ * @see [DOM API]{@link https://developer.mozilla.org/en-US/docs/Web/API/Element/getAttribute}
+ */
+ getAttribute(attribute) {
+ return getAttribute(this.el_, attribute);
+ }
+
+ /**
+ * Set the value of an attribute on the `Component`'s element
+ *
+ * @param {string} attribute
+ * Name of the attribute to set.
+ *
+ * @param {string} value
+ * Value to set the attribute to.
+ *
+ * @see [DOM API]{@link https://developer.mozilla.org/en-US/docs/Web/API/Element/setAttribute}
+ */
+ setAttribute(attribute, value) {
+ setAttribute(this.el_, attribute, value);
+ }
+
+ /**
+ * Remove an attribute from the `Component`s element.
+ *
+ * @param {string} attribute
+ * Name of the attribute to remove.
+ *
+ * @see [DOM API]{@link https://developer.mozilla.org/en-US/docs/Web/API/Element/removeAttribute}
+ */
+ removeAttribute(attribute) {
+ removeAttribute(this.el_, attribute);
+ }
+
+ /**
+ * Get or set the width of the component based upon the CSS styles.
+ * See {@link Component#dimension} for more detailed information.
+ *
+ * @param {number|string} [num]
+ * The width that you want to set postfixed with '%', 'px' or nothing.
+ *
+ * @param {boolean} [skipListeners]
+ * Skip the componentresize event trigger
+ *
+ * @return {number|undefined}
+ * The width when getting, zero if there is no width
+ */
+ width(num, skipListeners) {
+ return this.dimension('width', num, skipListeners);
+ }
+
+ /**
+ * Get or set the height of the component based upon the CSS styles.
+ * See {@link Component#dimension} for more detailed information.
+ *
+ * @param {number|string} [num]
+ * The height that you want to set postfixed with '%', 'px' or nothing.
+ *
+ * @param {boolean} [skipListeners]
+ * Skip the componentresize event trigger
+ *
+ * @return {number|undefined}
+ * The height when getting, zero if there is no height
+ */
+ height(num, skipListeners) {
+ return this.dimension('height', num, skipListeners);
+ }
+
+ /**
+ * Set both the width and height of the `Component` element at the same time.
+ *
+ * @param {number|string} width
+ * Width to set the `Component`s element to.
+ *
+ * @param {number|string} height
+ * Height to set the `Component`s element to.
+ */
+ dimensions(width, height) {
+ // Skip componentresize listeners on width for optimization
+ this.width(width, true);
+ this.height(height);
+ }
+
+ /**
+ * Get or set width or height of the `Component` element. This is the shared code
+ * for the {@link Component#width} and {@link Component#height}.
+ *
+ * Things to know:
+ * - If the width or height in an number this will return the number postfixed with 'px'.
+ * - If the width/height is a percent this will return the percent postfixed with '%'
+ * - Hidden elements have a width of 0 with `window.getComputedStyle`. This function
+ * defaults to the `Component`s `style.width` and falls back to `window.getComputedStyle`.
+ * See [this]{@link http://www.foliotek.com/devblog/getting-the-width-of-a-hidden-element-with-jquery-using-width/}
+ * for more information
+ * - If you want the computed style of the component, use {@link Component#currentWidth}
+ * and {@link {Component#currentHeight}
+ *
+ * @fires Component#componentresize
+ *
+ * @param {string} widthOrHeight
+ 8 'width' or 'height'
+ *
+ * @param {number|string} [num]
+ 8 New dimension
+ *
+ * @param {boolean} [skipListeners]
+ * Skip componentresize event trigger
+ *
+ * @return {number|undefined}
+ * The dimension when getting or 0 if unset
+ */
+ dimension(widthOrHeight, num, skipListeners) {
+ if (num !== undefined) {
+ // Set to zero if null or literally NaN (NaN !== NaN)
+ if (num === null || num !== num) {
+ num = 0;
+ }
+
+ // Check if using css width/height (% or px) and adjust
+ if (('' + num).indexOf('%') !== -1 || ('' + num).indexOf('px') !== -1) {
+ this.el_.style[widthOrHeight] = num;
+ } else if (num === 'auto') {
+ this.el_.style[widthOrHeight] = '';
+ } else {
+ this.el_.style[widthOrHeight] = num + 'px';
+ }
+
+ // skipListeners allows us to avoid triggering the resize event when setting both width and height
+ if (!skipListeners) {
+ /**
+ * Triggered when a component is resized.
+ *
+ * @event Component#componentresize
+ * @type {Event}
+ */
+ this.trigger('componentresize');
+ }
+ return;
+ }
+
+ // Not setting a value, so getting it
+ // Make sure element exists
+ if (!this.el_) {
+ return 0;
+ }
+
+ // Get dimension value from style
+ const val = this.el_.style[widthOrHeight];
+ const pxIndex = val.indexOf('px');
+ if (pxIndex !== -1) {
+ // Return the pixel value with no 'px'
+ return parseInt(val.slice(0, pxIndex), 10);
+ }
+
+ // No px so using % or no style was set, so falling back to offsetWidth/height
+ // If component has display:none, offset will return 0
+ // TODO: handle display:none and no dimension style using px
+ return parseInt(this.el_['offset' + toTitleCase$1(widthOrHeight)], 10);
+ }
+
+ /**
+ * Get the computed width or the height of the component's element.
+ *
+ * Uses `window.getComputedStyle`.
+ *
+ * @param {string} widthOrHeight
+ * A string containing 'width' or 'height'. Whichever one you want to get.
+ *
+ * @return {number}
+ * The dimension that gets asked for or 0 if nothing was set
+ * for that dimension.
+ */
+ currentDimension(widthOrHeight) {
+ let computedWidthOrHeight = 0;
+ if (widthOrHeight !== 'width' && widthOrHeight !== 'height') {
+ throw new Error('currentDimension only accepts width or height value');
+ }
+ computedWidthOrHeight = computedStyle(this.el_, widthOrHeight);
+
+ // remove 'px' from variable and parse as integer
+ computedWidthOrHeight = parseFloat(computedWidthOrHeight);
+
+ // if the computed value is still 0, it's possible that the browser is lying
+ // and we want to check the offset values.
+ // This code also runs wherever getComputedStyle doesn't exist.
+ if (computedWidthOrHeight === 0 || isNaN(computedWidthOrHeight)) {
+ const rule = `offset${toTitleCase$1(widthOrHeight)}`;
+ computedWidthOrHeight = this.el_[rule];
+ }
+ return computedWidthOrHeight;
+ }
+
+ /**
+ * An object that contains width and height values of the `Component`s
+ * computed style. Uses `window.getComputedStyle`.
+ *
+ * @typedef {Object} Component~DimensionObject
+ *
+ * @property {number} width
+ * The width of the `Component`s computed style.
+ *
+ * @property {number} height
+ * The height of the `Component`s computed style.
+ */
+
+ /**
+ * Get an object that contains computed width and height values of the
+ * component's element.
+ *
+ * Uses `window.getComputedStyle`.
+ *
+ * @return {Component~DimensionObject}
+ * The computed dimensions of the component's element.
+ */
+ currentDimensions() {
+ return {
+ width: this.currentDimension('width'),
+ height: this.currentDimension('height')
+ };
+ }
+
+ /**
+ * Get the computed width of the component's element.
+ *
+ * Uses `window.getComputedStyle`.
+ *
+ * @return {number}
+ * The computed width of the component's element.
+ */
+ currentWidth() {
+ return this.currentDimension('width');
+ }
+
+ /**
+ * Get the computed height of the component's element.
+ *
+ * Uses `window.getComputedStyle`.
+ *
+ * @return {number}
+ * The computed height of the component's element.
+ */
+ currentHeight() {
+ return this.currentDimension('height');
+ }
+
+ /**
+ * Set the focus to this component
+ */
+ focus() {
+ this.el_.focus();
+ }
+
+ /**
+ * Remove the focus from this component
+ */
+ blur() {
+ this.el_.blur();
+ }
+
+ /**
+ * When this Component receives a `keydown` event which it does not process,
+ * it passes the event to the Player for handling.
+ *
+ * @param {KeyboardEvent} event
+ * The `keydown` event that caused this function to be called.
+ */
+ handleKeyDown(event) {
+ if (this.player_) {
+ // We only stop propagation here because we want unhandled events to fall
+ // back to the browser. Exclude Tab for focus trapping.
+ if (!keycode.isEventKey(event, 'Tab')) {
+ event.stopPropagation();
+ }
+ this.player_.handleKeyDown(event);
+ }
+ }
+
+ /**
+ * Many components used to have a `handleKeyPress` method, which was poorly
+ * named because it listened to a `keydown` event. This method name now
+ * delegates to `handleKeyDown`. This means anyone calling `handleKeyPress`
+ * will not see their method calls stop working.
+ *
+ * @param {KeyboardEvent} event
+ * The event that caused this function to be called.
+ */
+ handleKeyPress(event) {
+ this.handleKeyDown(event);
+ }
+
+ /**
+ * Emit a 'tap' events when touch event support gets detected. This gets used to
+ * support toggling the controls through a tap on the video. They get enabled
+ * because every sub-component would have extra overhead otherwise.
+ *
+ * @protected
+ * @fires Component#tap
+ * @listens Component#touchstart
+ * @listens Component#touchmove
+ * @listens Component#touchleave
+ * @listens Component#touchcancel
+ * @listens Component#touchend
+ */
+ emitTapEvents() {
+ // Track the start time so we can determine how long the touch lasted
+ let touchStart = 0;
+ let firstTouch = null;
+
+ // Maximum movement allowed during a touch event to still be considered a tap
+ // Other popular libs use anywhere from 2 (hammer.js) to 15,
+ // so 10 seems like a nice, round number.
+ const tapMovementThreshold = 10;
+
+ // The maximum length a touch can be while still being considered a tap
+ const touchTimeThreshold = 200;
+ let couldBeTap;
+ this.on('touchstart', function (event) {
+ // If more than one finger, don't consider treating this as a click
+ if (event.touches.length === 1) {
+ // Copy pageX/pageY from the object
+ firstTouch = {
+ pageX: event.touches[0].pageX,
+ pageY: event.touches[0].pageY
+ };
+ // Record start time so we can detect a tap vs. "touch and hold"
+ touchStart = window.performance.now();
+ // Reset couldBeTap tracking
+ couldBeTap = true;
+ }
+ });
+ this.on('touchmove', function (event) {
+ // If more than one finger, don't consider treating this as a click
+ if (event.touches.length > 1) {
+ couldBeTap = false;
+ } else if (firstTouch) {
+ // Some devices will throw touchmoves for all but the slightest of taps.
+ // So, if we moved only a small distance, this could still be a tap
+ const xdiff = event.touches[0].pageX - firstTouch.pageX;
+ const ydiff = event.touches[0].pageY - firstTouch.pageY;
+ const touchDistance = Math.sqrt(xdiff * xdiff + ydiff * ydiff);
+ if (touchDistance > tapMovementThreshold) {
+ couldBeTap = false;
+ }
+ }
+ });
+ const noTap = function () {
+ couldBeTap = false;
+ };
+
+ // TODO: Listen to the original target. http://youtu.be/DujfpXOKUp8?t=13m8s
+ this.on('touchleave', noTap);
+ this.on('touchcancel', noTap);
+
+ // When the touch ends, measure how long it took and trigger the appropriate
+ // event
+ this.on('touchend', function (event) {
+ firstTouch = null;
+ // Proceed only if the touchmove/leave/cancel event didn't happen
+ if (couldBeTap === true) {
+ // Measure how long the touch lasted
+ const touchTime = window.performance.now() - touchStart;
+
+ // Make sure the touch was less than the threshold to be considered a tap
+ if (touchTime < touchTimeThreshold) {
+ // Don't let browser turn this into a click
+ event.preventDefault();
+ /**
+ * Triggered when a `Component` is tapped.
+ *
+ * @event Component#tap
+ * @type {MouseEvent}
+ */
+ this.trigger('tap');
+ // It may be good to copy the touchend event object and change the
+ // type to tap, if the other event properties aren't exact after
+ // Events.fixEvent runs (e.g. event.target)
+ }
+ }
+ });
+ }
+
+ /**
+ * This function reports user activity whenever touch events happen. This can get
+ * turned off by any sub-components that wants touch events to act another way.
+ *
+ * Report user touch activity when touch events occur. User activity gets used to
+ * determine when controls should show/hide. It is simple when it comes to mouse
+ * events, because any mouse event should show the controls. So we capture mouse
+ * events that bubble up to the player and report activity when that happens.
+ * With touch events it isn't as easy as `touchstart` and `touchend` toggle player
+ * controls. So touch events can't help us at the player level either.
+ *
+ * User activity gets checked asynchronously. So what could happen is a tap event
+ * on the video turns the controls off. Then the `touchend` event bubbles up to
+ * the player. Which, if it reported user activity, would turn the controls right
+ * back on. We also don't want to completely block touch events from bubbling up.
+ * Furthermore a `touchmove` event and anything other than a tap, should not turn
+ * controls back on.
+ *
+ * @listens Component#touchstart
+ * @listens Component#touchmove
+ * @listens Component#touchend
+ * @listens Component#touchcancel
+ */
+ enableTouchActivity() {
+ // Don't continue if the root player doesn't support reporting user activity
+ if (!this.player() || !this.player().reportUserActivity) {
+ return;
+ }
+
+ // listener for reporting that the user is active
+ const report = bind_(this.player(), this.player().reportUserActivity);
+ let touchHolding;
+ this.on('touchstart', function () {
+ report();
+ // For as long as the they are touching the device or have their mouse down,
+ // we consider them active even if they're not moving their finger or mouse.
+ // So we want to continue to update that they are active
+ this.clearInterval(touchHolding);
+ // report at the same interval as activityCheck
+ touchHolding = this.setInterval(report, 250);
+ });
+ const touchEnd = function (event) {
+ report();
+ // stop the interval that maintains activity if the touch is holding
+ this.clearInterval(touchHolding);
+ };
+ this.on('touchmove', report);
+ this.on('touchend', touchEnd);
+ this.on('touchcancel', touchEnd);
+ }
+
+ /**
+ * A callback that has no parameters and is bound into `Component`s context.
+ *
+ * @callback Component~GenericCallback
+ * @this Component
+ */
+
+ /**
+ * Creates a function that runs after an `x` millisecond timeout. This function is a
+ * wrapper around `window.setTimeout`. There are a few reasons to use this one
+ * instead though:
+ * 1. It gets cleared via {@link Component#clearTimeout} when
+ * {@link Component#dispose} gets called.
+ * 2. The function callback will gets turned into a {@link Component~GenericCallback}
+ *
+ * > Note: You can't use `window.clearTimeout` on the id returned by this function. This
+ * will cause its dispose listener not to get cleaned up! Please use
+ * {@link Component#clearTimeout} or {@link Component#dispose} instead.
+ *
+ * @param {Component~GenericCallback} fn
+ * The function that will be run after `timeout`.
+ *
+ * @param {number} timeout
+ * Timeout in milliseconds to delay before executing the specified function.
+ *
+ * @return {number}
+ * Returns a timeout ID that gets used to identify the timeout. It can also
+ * get used in {@link Component#clearTimeout} to clear the timeout that
+ * was set.
+ *
+ * @listens Component#dispose
+ * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/setTimeout}
+ */
+ setTimeout(fn, timeout) {
+ // declare as variables so they are properly available in timeout function
+ // eslint-disable-next-line
+ var timeoutId;
+ fn = bind_(this, fn);
+ this.clearTimersOnDispose_();
+ timeoutId = window.setTimeout(() => {
+ if (this.setTimeoutIds_.has(timeoutId)) {
+ this.setTimeoutIds_.delete(timeoutId);
+ }
+ fn();
+ }, timeout);
+ this.setTimeoutIds_.add(timeoutId);
+ return timeoutId;
+ }
+
+ /**
+ * Clears a timeout that gets created via `window.setTimeout` or
+ * {@link Component#setTimeout}. If you set a timeout via {@link Component#setTimeout}
+ * use this function instead of `window.clearTimout`. If you don't your dispose
+ * listener will not get cleaned up until {@link Component#dispose}!
+ *
+ * @param {number} timeoutId
+ * The id of the timeout to clear. The return value of
+ * {@link Component#setTimeout} or `window.setTimeout`.
+ *
+ * @return {number}
+ * Returns the timeout id that was cleared.
+ *
+ * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/clearTimeout}
+ */
+ clearTimeout(timeoutId) {
+ if (this.setTimeoutIds_.has(timeoutId)) {
+ this.setTimeoutIds_.delete(timeoutId);
+ window.clearTimeout(timeoutId);
+ }
+ return timeoutId;
+ }
+
+ /**
+ * Creates a function that gets run every `x` milliseconds. This function is a wrapper
+ * around `window.setInterval`. There are a few reasons to use this one instead though.
+ * 1. It gets cleared via {@link Component#clearInterval} when
+ * {@link Component#dispose} gets called.
+ * 2. The function callback will be a {@link Component~GenericCallback}
+ *
+ * @param {Component~GenericCallback} fn
+ * The function to run every `x` seconds.
+ *
+ * @param {number} interval
+ * Execute the specified function every `x` milliseconds.
+ *
+ * @return {number}
+ * Returns an id that can be used to identify the interval. It can also be be used in
+ * {@link Component#clearInterval} to clear the interval.
+ *
+ * @listens Component#dispose
+ * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/setInterval}
+ */
+ setInterval(fn, interval) {
+ fn = bind_(this, fn);
+ this.clearTimersOnDispose_();
+ const intervalId = window.setInterval(fn, interval);
+ this.setIntervalIds_.add(intervalId);
+ return intervalId;
+ }
+
+ /**
+ * Clears an interval that gets created via `window.setInterval` or
+ * {@link Component#setInterval}. If you set an interval via {@link Component#setInterval}
+ * use this function instead of `window.clearInterval`. If you don't your dispose
+ * listener will not get cleaned up until {@link Component#dispose}!
+ *
+ * @param {number} intervalId
+ * The id of the interval to clear. The return value of
+ * {@link Component#setInterval} or `window.setInterval`.
+ *
+ * @return {number}
+ * Returns the interval id that was cleared.
+ *
+ * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/clearInterval}
+ */
+ clearInterval(intervalId) {
+ if (this.setIntervalIds_.has(intervalId)) {
+ this.setIntervalIds_.delete(intervalId);
+ window.clearInterval(intervalId);
+ }
+ return intervalId;
+ }
+
+ /**
+ * Queues up a callback to be passed to requestAnimationFrame (rAF), but
+ * with a few extra bonuses:
+ *
+ * - Supports browsers that do not support rAF by falling back to
+ * {@link Component#setTimeout}.
+ *
+ * - The callback is turned into a {@link Component~GenericCallback} (i.e.
+ * bound to the component).
+ *
+ * - Automatic cancellation of the rAF callback is handled if the component
+ * is disposed before it is called.
+ *
+ * @param {Component~GenericCallback} fn
+ * A function that will be bound to this component and executed just
+ * before the browser's next repaint.
+ *
+ * @return {number}
+ * Returns an rAF ID that gets used to identify the timeout. It can
+ * also be used in {@link Component#cancelAnimationFrame} to cancel
+ * the animation frame callback.
+ *
+ * @listens Component#dispose
+ * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/window/requestAnimationFrame}
+ */
+ requestAnimationFrame(fn) {
+ this.clearTimersOnDispose_();
+
+ // declare as variables so they are properly available in rAF function
+ // eslint-disable-next-line
+ var id;
+ fn = bind_(this, fn);
+ id = window.requestAnimationFrame(() => {
+ if (this.rafIds_.has(id)) {
+ this.rafIds_.delete(id);
+ }
+ fn();
+ });
+ this.rafIds_.add(id);
+ return id;
+ }
+
+ /**
+ * Request an animation frame, but only one named animation
+ * frame will be queued. Another will never be added until
+ * the previous one finishes.
+ *
+ * @param {string} name
+ * The name to give this requestAnimationFrame
+ *
+ * @param {Component~GenericCallback} fn
+ * A function that will be bound to this component and executed just
+ * before the browser's next repaint.
+ */
+ requestNamedAnimationFrame(name, fn) {
+ if (this.namedRafs_.has(name)) {
+ return;
+ }
+ this.clearTimersOnDispose_();
+ fn = bind_(this, fn);
+ const id = this.requestAnimationFrame(() => {
+ fn();
+ if (this.namedRafs_.has(name)) {
+ this.namedRafs_.delete(name);
+ }
+ });
+ this.namedRafs_.set(name, id);
+ return name;
+ }
+
+ /**
+ * Cancels a current named animation frame if it exists.
+ *
+ * @param {string} name
+ * The name of the requestAnimationFrame to cancel.
+ */
+ cancelNamedAnimationFrame(name) {
+ if (!this.namedRafs_.has(name)) {
+ return;
+ }
+ this.cancelAnimationFrame(this.namedRafs_.get(name));
+ this.namedRafs_.delete(name);
+ }
+
+ /**
+ * Cancels a queued callback passed to {@link Component#requestAnimationFrame}
+ * (rAF).
+ *
+ * If you queue an rAF callback via {@link Component#requestAnimationFrame},
+ * use this function instead of `window.cancelAnimationFrame`. If you don't,
+ * your dispose listener will not get cleaned up until {@link Component#dispose}!
+ *
+ * @param {number} id
+ * The rAF ID to clear. The return value of {@link Component#requestAnimationFrame}.
+ *
+ * @return {number}
+ * Returns the rAF ID that was cleared.
+ *
+ * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/window/cancelAnimationFrame}
+ */
+ cancelAnimationFrame(id) {
+ if (this.rafIds_.has(id)) {
+ this.rafIds_.delete(id);
+ window.cancelAnimationFrame(id);
+ }
+ return id;
+ }
+
+ /**
+ * A function to setup `requestAnimationFrame`, `setTimeout`,
+ * and `setInterval`, clearing on dispose.
+ *
+ * > Previously each timer added and removed dispose listeners on it's own.
+ * For better performance it was decided to batch them all, and use `Set`s
+ * to track outstanding timer ids.
+ *
+ * @private
+ */
+ clearTimersOnDispose_() {
+ if (this.clearingTimersOnDispose_) {
+ return;
+ }
+ this.clearingTimersOnDispose_ = true;
+ this.one('dispose', () => {
+ [['namedRafs_', 'cancelNamedAnimationFrame'], ['rafIds_', 'cancelAnimationFrame'], ['setTimeoutIds_', 'clearTimeout'], ['setIntervalIds_', 'clearInterval']].forEach(([idName, cancelName]) => {
+ // for a `Set` key will actually be the value again
+ // so forEach((val, val) =>` but for maps we want to use
+ // the key.
+ this[idName].forEach((val, key) => this[cancelName](key));
+ });
+ this.clearingTimersOnDispose_ = false;
+ });
+ }
+
+ /**
+ * Register a `Component` with `videojs` given the name and the component.
+ *
+ * > NOTE: {@link Tech}s should not be registered as a `Component`. {@link Tech}s
+ * should be registered using {@link Tech.registerTech} or
+ * {@link videojs:videojs.registerTech}.
+ *
+ * > NOTE: This function can also be seen on videojs as
+ * {@link videojs:videojs.registerComponent}.
+ *
+ * @param {string} name
+ * The name of the `Component` to register.
+ *
+ * @param {Component} ComponentToRegister
+ * The `Component` class to register.
+ *
+ * @return {Component}
+ * The `Component` that was registered.
+ */
+ static registerComponent(name, ComponentToRegister) {
+ if (typeof name !== 'string' || !name) {
+ throw new Error(`Illegal component name, "${name}"; must be a non-empty string.`);
+ }
+ const Tech = Component$1.getComponent('Tech');
+
+ // We need to make sure this check is only done if Tech has been registered.
+ const isTech = Tech && Tech.isTech(ComponentToRegister);
+ const isComp = Component$1 === ComponentToRegister || Component$1.prototype.isPrototypeOf(ComponentToRegister.prototype);
+ if (isTech || !isComp) {
+ let reason;
+ if (isTech) {
+ reason = 'techs must be registered using Tech.registerTech()';
+ } else {
+ reason = 'must be a Component subclass';
+ }
+ throw new Error(`Illegal component, "${name}"; ${reason}.`);
+ }
+ name = toTitleCase$1(name);
+ if (!Component$1.components_) {
+ Component$1.components_ = {};
+ }
+ const Player = Component$1.getComponent('Player');
+ if (name === 'Player' && Player && Player.players) {
+ const players = Player.players;
+ const playerNames = Object.keys(players);
+
+ // If we have players that were disposed, then their name will still be
+ // in Players.players. So, we must loop through and verify that the value
+ // for each item is not null. This allows registration of the Player component
+ // after all players have been disposed or before any were created.
+ if (players && playerNames.length > 0 && playerNames.map(pname => players[pname]).every(Boolean)) {
+ throw new Error('Can not register Player component after player has been created.');
+ }
+ }
+ Component$1.components_[name] = ComponentToRegister;
+ Component$1.components_[toLowerCase(name)] = ComponentToRegister;
+ return ComponentToRegister;
+ }
+
+ /**
+ * Get a `Component` based on the name it was registered with.
+ *
+ * @param {string} name
+ * The Name of the component to get.
+ *
+ * @return {typeof Component}
+ * The `Component` that got registered under the given name.
+ */
+ static getComponent(name) {
+ if (!name || !Component$1.components_) {
+ return;
+ }
+ return Component$1.components_[name];
+ }
+ }
+ Component$1.registerComponent('Component', Component$1);
+
+ /**
+ * @file time.js
+ * @module time
+ */
+
+ /**
+ * Returns the time for the specified index at the start or end
+ * of a TimeRange object.
+ *
+ * @typedef {Function} TimeRangeIndex
+ *
+ * @param {number} [index=0]
+ * The range number to return the time for.
+ *
+ * @return {number}
+ * The time offset at the specified index.
+ *
+ * @deprecated The index argument must be provided.
+ * In the future, leaving it out will throw an error.
+ */
+
+ /**
+ * An object that contains ranges of time, which mimics {@link TimeRanges}.
+ *
+ * @typedef {Object} TimeRange
+ *
+ * @property {number} length
+ * The number of time ranges represented by this object.
+ *
+ * @property {module:time~TimeRangeIndex} start
+ * Returns the time offset at which a specified time range begins.
+ *
+ * @property {module:time~TimeRangeIndex} end
+ * Returns the time offset at which a specified time range ends.
+ *
+ * @see https://developer.mozilla.org/en-US/docs/Web/API/TimeRanges
+ */
+
+ /**
+ * Check if any of the time ranges are over the maximum index.
+ *
+ * @private
+ * @param {string} fnName
+ * The function name to use for logging
+ *
+ * @param {number} index
+ * The index to check
+ *
+ * @param {number} maxIndex
+ * The maximum possible index
+ *
+ * @throws {Error} if the timeRanges provided are over the maxIndex
+ */
+ function rangeCheck(fnName, index, maxIndex) {
+ if (typeof index !== 'number' || index < 0 || index > maxIndex) {
+ throw new Error(`Failed to execute '${fnName}' on 'TimeRanges': The index provided (${index}) is non-numeric or out of bounds (0-${maxIndex}).`);
+ }
+ }
+
+ /**
+ * Get the time for the specified index at the start or end
+ * of a TimeRange object.
+ *
+ * @private
+ * @param {string} fnName
+ * The function name to use for logging
+ *
+ * @param {string} valueIndex
+ * The property that should be used to get the time. should be
+ * 'start' or 'end'
+ *
+ * @param {Array} ranges
+ * An array of time ranges
+ *
+ * @param {Array} [rangeIndex=0]
+ * The index to start the search at
+ *
+ * @return {number}
+ * The time that offset at the specified index.
+ *
+ * @deprecated rangeIndex must be set to a value, in the future this will throw an error.
+ * @throws {Error} if rangeIndex is more than the length of ranges
+ */
+ function getRange(fnName, valueIndex, ranges, rangeIndex) {
+ rangeCheck(fnName, rangeIndex, ranges.length - 1);
+ return ranges[rangeIndex][valueIndex];
+ }
+
+ /**
+ * Create a time range object given ranges of time.
+ *
+ * @private
+ * @param {Array} [ranges]
+ * An array of time ranges.
+ *
+ * @return {TimeRange}
+ */
+ function createTimeRangesObj(ranges) {
+ let timeRangesObj;
+ if (ranges === undefined || ranges.length === 0) {
+ timeRangesObj = {
+ length: 0,
+ start() {
+ throw new Error('This TimeRanges object is empty');
+ },
+ end() {
+ throw new Error('This TimeRanges object is empty');
+ }
+ };
+ } else {
+ timeRangesObj = {
+ length: ranges.length,
+ start: getRange.bind(null, 'start', 0, ranges),
+ end: getRange.bind(null, 'end', 1, ranges)
+ };
+ }
+ if (window.Symbol && window.Symbol.iterator) {
+ timeRangesObj[window.Symbol.iterator] = () => (ranges || []).values();
+ }
+ return timeRangesObj;
+ }
+
+ /**
+ * Create a `TimeRange` object which mimics an
+ * {@link https://developer.mozilla.org/en-US/docs/Web/API/TimeRanges|HTML5 TimeRanges instance}.
+ *
+ * @param {number|Array[]} start
+ * The start of a single range (a number) or an array of ranges (an
+ * array of arrays of two numbers each).
+ *
+ * @param {number} end
+ * The end of a single range. Cannot be used with the array form of
+ * the `start` argument.
+ *
+ * @return {TimeRange}
+ */
+ function createTimeRanges$1(start, end) {
+ if (Array.isArray(start)) {
+ return createTimeRangesObj(start);
+ } else if (start === undefined || end === undefined) {
+ return createTimeRangesObj();
+ }
+ return createTimeRangesObj([[start, end]]);
+ }
+
+ /**
+ * Format seconds as a time string, H:MM:SS or M:SS. Supplying a guide (in
+ * seconds) will force a number of leading zeros to cover the length of the
+ * guide.
+ *
+ * @private
+ * @param {number} seconds
+ * Number of seconds to be turned into a string
+ *
+ * @param {number} guide
+ * Number (in seconds) to model the string after
+ *
+ * @return {string}
+ * Time formatted as H:MM:SS or M:SS
+ */
+ const defaultImplementation = function (seconds, guide) {
+ seconds = seconds < 0 ? 0 : seconds;
+ let s = Math.floor(seconds % 60);
+ let m = Math.floor(seconds / 60 % 60);
+ let h = Math.floor(seconds / 3600);
+ const gm = Math.floor(guide / 60 % 60);
+ const gh = Math.floor(guide / 3600);
+
+ // handle invalid times
+ if (isNaN(seconds) || seconds === Infinity) {
+ // '-' is false for all relational operators (e.g. <, >=) so this setting
+ // will add the minimum number of fields specified by the guide
+ h = m = s = '-';
+ }
+
+ // Check if we need to show hours
+ h = h > 0 || gh > 0 ? h + ':' : '';
+
+ // If hours are showing, we may need to add a leading zero.
+ // Always show at least one digit of minutes.
+ m = ((h || gm >= 10) && m < 10 ? '0' + m : m) + ':';
+
+ // Check if leading zero is need for seconds
+ s = s < 10 ? '0' + s : s;
+ return h + m + s;
+ };
+
+ // Internal pointer to the current implementation.
+ let implementation = defaultImplementation;
+
+ /**
+ * Replaces the default formatTime implementation with a custom implementation.
+ *
+ * @param {Function} customImplementation
+ * A function which will be used in place of the default formatTime
+ * implementation. Will receive the current time in seconds and the
+ * guide (in seconds) as arguments.
+ */
+ function setFormatTime(customImplementation) {
+ implementation = customImplementation;
+ }
+
+ /**
+ * Resets formatTime to the default implementation.
+ */
+ function resetFormatTime() {
+ implementation = defaultImplementation;
+ }
+
+ /**
+ * Delegates to either the default time formatting function or a custom
+ * function supplied via `setFormatTime`.
+ *
+ * Formats seconds as a time string (H:MM:SS or M:SS). Supplying a
+ * guide (in seconds) will force a number of leading zeros to cover the
+ * length of the guide.
+ *
+ * @example formatTime(125, 600) === "02:05"
+ * @param {number} seconds
+ * Number of seconds to be turned into a string
+ *
+ * @param {number} guide
+ * Number (in seconds) to model the string after
+ *
+ * @return {string}
+ * Time formatted as H:MM:SS or M:SS
+ */
+ function formatTime(seconds, guide = seconds) {
+ return implementation(seconds, guide);
+ }
+
+ var Time = /*#__PURE__*/Object.freeze({
+ __proto__: null,
+ createTimeRanges: createTimeRanges$1,
+ createTimeRange: createTimeRanges$1,
+ setFormatTime: setFormatTime,
+ resetFormatTime: resetFormatTime,
+ formatTime: formatTime
+ });
+
+ /**
+ * @file buffer.js
+ * @module buffer
+ */
+
+ /**
+ * Compute the percentage of the media that has been buffered.
+ *
+ * @param { import('./time').TimeRange } buffered
+ * The current `TimeRanges` object representing buffered time ranges
+ *
+ * @param {number} duration
+ * Total duration of the media
+ *
+ * @return {number}
+ * Percent buffered of the total duration in decimal form.
+ */
+ function bufferedPercent(buffered, duration) {
+ let bufferedDuration = 0;
+ let start;
+ let end;
+ if (!duration) {
+ return 0;
+ }
+ if (!buffered || !buffered.length) {
+ buffered = createTimeRanges$1(0, 0);
+ }
+ for (let i = 0; i < buffered.length; i++) {
+ start = buffered.start(i);
+ end = buffered.end(i);
+
+ // buffered end can be bigger than duration by a very small fraction
+ if (end > duration) {
+ end = duration;
+ }
+ bufferedDuration += end - start;
+ }
+ return bufferedDuration / duration;
+ }
+
+ /**
+ * @file media-error.js
+ */
+
+ /**
+ * A Custom `MediaError` class which mimics the standard HTML5 `MediaError` class.
+ *
+ * @param {number|string|Object|MediaError} value
+ * This can be of multiple types:
+ * - number: should be a standard error code
+ * - string: an error message (the code will be 0)
+ * - Object: arbitrary properties
+ * - `MediaError` (native): used to populate a video.js `MediaError` object
+ * - `MediaError` (video.js): will return itself if it's already a
+ * video.js `MediaError` object.
+ *
+ * @see [MediaError Spec]{@link https://dev.w3.org/html5/spec-author-view/video.html#mediaerror}
+ * @see [Encrypted MediaError Spec]{@link https://www.w3.org/TR/2013/WD-encrypted-media-20130510/#error-codes}
+ *
+ * @class MediaError
+ */
+ function MediaError(value) {
+ // Allow redundant calls to this constructor to avoid having `instanceof`
+ // checks peppered around the code.
+ if (value instanceof MediaError) {
+ return value;
+ }
+ if (typeof value === 'number') {
+ this.code = value;
+ } else if (typeof value === 'string') {
+ // default code is zero, so this is a custom error
+ this.message = value;
+ } else if (isObject$1(value)) {
+ // We assign the `code` property manually because native `MediaError` objects
+ // do not expose it as an own/enumerable property of the object.
+ if (typeof value.code === 'number') {
+ this.code = value.code;
+ }
+ Object.assign(this, value);
+ }
+ if (!this.message) {
+ this.message = MediaError.defaultMessages[this.code] || '';
+ }
+ }
+
+ /**
+ * The error code that refers two one of the defined `MediaError` types
+ *
+ * @type {Number}
+ */
+ MediaError.prototype.code = 0;
+
+ /**
+ * An optional message that to show with the error. Message is not part of the HTML5
+ * video spec but allows for more informative custom errors.
+ *
+ * @type {String}
+ */
+ MediaError.prototype.message = '';
+
+ /**
+ * An optional status code that can be set by plugins to allow even more detail about
+ * the error. For example a plugin might provide a specific HTTP status code and an
+ * error message for that code. Then when the plugin gets that error this class will
+ * know how to display an error message for it. This allows a custom message to show
+ * up on the `Player` error overlay.
+ *
+ * @type {Array}
+ */
+ MediaError.prototype.status = null;
+
+ /**
+ * An object containing an error type, as well as other information regarding the error.
+ *
+ * @typedef {{errorType: string, [key: string]: any}} ErrorMetadata
+ */
+
+ /**
+ * An optional object to give more detail about the error. This can be used to give
+ * a higher level of specificity to an error versus the more generic MediaError codes.
+ * `metadata` expects an `errorType` string that should align with the values from videojs.Error.
+ *
+ * @type {ErrorMetadata}
+ */
+ MediaError.prototype.metadata = null;
+
+ /**
+ * Errors indexed by the W3C standard. The order **CANNOT CHANGE**! See the
+ * specification listed under {@link MediaError} for more information.
+ *
+ * @enum {array}
+ * @readonly
+ * @property {string} 0 - MEDIA_ERR_CUSTOM
+ * @property {string} 1 - MEDIA_ERR_ABORTED
+ * @property {string} 2 - MEDIA_ERR_NETWORK
+ * @property {string} 3 - MEDIA_ERR_DECODE
+ * @property {string} 4 - MEDIA_ERR_SRC_NOT_SUPPORTED
+ * @property {string} 5 - MEDIA_ERR_ENCRYPTED
+ */
+ MediaError.errorTypes = ['MEDIA_ERR_CUSTOM', 'MEDIA_ERR_ABORTED', 'MEDIA_ERR_NETWORK', 'MEDIA_ERR_DECODE', 'MEDIA_ERR_SRC_NOT_SUPPORTED', 'MEDIA_ERR_ENCRYPTED'];
+
+ /**
+ * The default `MediaError` messages based on the {@link MediaError.errorTypes}.
+ *
+ * @type {Array}
+ * @constant
+ */
+ MediaError.defaultMessages = {
+ 1: 'You aborted the media playback',
+ 2: 'A network error caused the media download to fail part-way.',
+ 3: 'The media playback was aborted due to a corruption problem or because the media used features your browser did not support.',
+ 4: 'The media could not be loaded, either because the server or network failed or because the format is not supported.',
+ 5: 'The media is encrypted and we do not have the keys to decrypt it.'
+ };
+
+ /**
+ * W3C error code for any custom error.
+ *
+ * @member MediaError#MEDIA_ERR_CUSTOM
+ * @constant {number}
+ * @default 0
+ */
+ MediaError.MEDIA_ERR_CUSTOM = 0;
+
+ /**
+ * W3C error code for any custom error.
+ *
+ * @member MediaError.MEDIA_ERR_CUSTOM
+ * @constant {number}
+ * @default 0
+ */
+ MediaError.prototype.MEDIA_ERR_CUSTOM = 0;
+
+ /**
+ * W3C error code for media error aborted.
+ *
+ * @member MediaError#MEDIA_ERR_ABORTED
+ * @constant {number}
+ * @default 1
+ */
+ MediaError.MEDIA_ERR_ABORTED = 1;
+
+ /**
+ * W3C error code for media error aborted.
+ *
+ * @member MediaError.MEDIA_ERR_ABORTED
+ * @constant {number}
+ * @default 1
+ */
+ MediaError.prototype.MEDIA_ERR_ABORTED = 1;
+
+ /**
+ * W3C error code for any network error.
+ *
+ * @member MediaError#MEDIA_ERR_NETWORK
+ * @constant {number}
+ * @default 2
+ */
+ MediaError.MEDIA_ERR_NETWORK = 2;
+
+ /**
+ * W3C error code for any network error.
+ *
+ * @member MediaError.MEDIA_ERR_NETWORK
+ * @constant {number}
+ * @default 2
+ */
+ MediaError.prototype.MEDIA_ERR_NETWORK = 2;
+
+ /**
+ * W3C error code for any decoding error.
+ *
+ * @member MediaError#MEDIA_ERR_DECODE
+ * @constant {number}
+ * @default 3
+ */
+ MediaError.MEDIA_ERR_DECODE = 3;
+
+ /**
+ * W3C error code for any decoding error.
+ *
+ * @member MediaError.MEDIA_ERR_DECODE
+ * @constant {number}
+ * @default 3
+ */
+ MediaError.prototype.MEDIA_ERR_DECODE = 3;
+
+ /**
+ * W3C error code for any time that a source is not supported.
+ *
+ * @member MediaError#MEDIA_ERR_SRC_NOT_SUPPORTED
+ * @constant {number}
+ * @default 4
+ */
+ MediaError.MEDIA_ERR_SRC_NOT_SUPPORTED = 4;
+
+ /**
+ * W3C error code for any time that a source is not supported.
+ *
+ * @member MediaError.MEDIA_ERR_SRC_NOT_SUPPORTED
+ * @constant {number}
+ * @default 4
+ */
+ MediaError.prototype.MEDIA_ERR_SRC_NOT_SUPPORTED = 4;
+
+ /**
+ * W3C error code for any time that a source is encrypted.
+ *
+ * @member MediaError#MEDIA_ERR_ENCRYPTED
+ * @constant {number}
+ * @default 5
+ */
+ MediaError.MEDIA_ERR_ENCRYPTED = 5;
+
+ /**
+ * W3C error code for any time that a source is encrypted.
+ *
+ * @member MediaError.MEDIA_ERR_ENCRYPTED
+ * @constant {number}
+ * @default 5
+ */
+ MediaError.prototype.MEDIA_ERR_ENCRYPTED = 5;
+
+ var tuple = SafeParseTuple;
+ function SafeParseTuple(obj, reviver) {
+ var json;
+ var error = null;
+ try {
+ json = JSON.parse(obj, reviver);
+ } catch (err) {
+ error = err;
+ }
+ return [error, json];
+ }
+
+ /**
+ * Returns whether an object is `Promise`-like (i.e. has a `then` method).
+ *
+ * @param {Object} value
+ * An object that may or may not be `Promise`-like.
+ *
+ * @return {boolean}
+ * Whether or not the object is `Promise`-like.
+ */
+ function isPromise(value) {
+ return value !== undefined && value !== null && typeof value.then === 'function';
+ }
+
+ /**
+ * Silence a Promise-like object.
+ *
+ * This is useful for avoiding non-harmful, but potentially confusing "uncaught
+ * play promise" rejection error messages.
+ *
+ * @param {Object} value
+ * An object that may or may not be `Promise`-like.
+ */
+ function silencePromise(value) {
+ if (isPromise(value)) {
+ value.then(null, e => {});
+ }
+ }
+
+ /**
+ * @file text-track-list-converter.js Utilities for capturing text track state and
+ * re-creating tracks based on a capture.
+ *
+ * @module text-track-list-converter
+ */
+
+ /**
+ * Examine a single {@link TextTrack} and return a JSON-compatible javascript object that
+ * represents the {@link TextTrack}'s state.
+ *
+ * @param {TextTrack} track
+ * The text track to query.
+ *
+ * @return {Object}
+ * A serializable javascript representation of the TextTrack.
+ * @private
+ */
+ const trackToJson_ = function (track) {
+ const ret = ['kind', 'label', 'language', 'id', 'inBandMetadataTrackDispatchType', 'mode', 'src'].reduce((acc, prop, i) => {
+ if (track[prop]) {
+ acc[prop] = track[prop];
+ }
+ return acc;
+ }, {
+ cues: track.cues && Array.prototype.map.call(track.cues, function (cue) {
+ return {
+ startTime: cue.startTime,
+ endTime: cue.endTime,
+ text: cue.text,
+ id: cue.id
+ };
+ })
+ });
+ return ret;
+ };
+
+ /**
+ * Examine a {@link Tech} and return a JSON-compatible javascript array that represents the
+ * state of all {@link TextTrack}s currently configured. The return array is compatible with
+ * {@link text-track-list-converter:jsonToTextTracks}.
+ *
+ * @param { import('../tech/tech').default } tech
+ * The tech object to query
+ *
+ * @return {Array}
+ * A serializable javascript representation of the {@link Tech}s
+ * {@link TextTrackList}.
+ */
+ const textTracksToJson = function (tech) {
+ const trackEls = tech.$$('track');
+ const trackObjs = Array.prototype.map.call(trackEls, t => t.track);
+ const tracks = Array.prototype.map.call(trackEls, function (trackEl) {
+ const json = trackToJson_(trackEl.track);
+ if (trackEl.src) {
+ json.src = trackEl.src;
+ }
+ return json;
+ });
+ return tracks.concat(Array.prototype.filter.call(tech.textTracks(), function (track) {
+ return trackObjs.indexOf(track) === -1;
+ }).map(trackToJson_));
+ };
+
+ /**
+ * Create a set of remote {@link TextTrack}s on a {@link Tech} based on an array of javascript
+ * object {@link TextTrack} representations.
+ *
+ * @param {Array} json
+ * An array of `TextTrack` representation objects, like those that would be
+ * produced by `textTracksToJson`.
+ *
+ * @param {Tech} tech
+ * The `Tech` to create the `TextTrack`s on.
+ */
+ const jsonToTextTracks = function (json, tech) {
+ json.forEach(function (track) {
+ const addedTrack = tech.addRemoteTextTrack(track).track;
+ if (!track.src && track.cues) {
+ track.cues.forEach(cue => addedTrack.addCue(cue));
+ }
+ });
+ return tech.textTracks();
+ };
+ var textTrackConverter = {
+ textTracksToJson,
+ jsonToTextTracks,
+ trackToJson_
+ };
+
+ /**
+ * @file modal-dialog.js
+ */
+ const MODAL_CLASS_NAME = 'vjs-modal-dialog';
+
+ /**
+ * The `ModalDialog` displays over the video and its controls, which blocks
+ * interaction with the player until it is closed.
+ *
+ * Modal dialogs include a "Close" button and will close when that button
+ * is activated - or when ESC is pressed anywhere.
+ *
+ * @extends Component
+ */
+ class ModalDialog extends Component$1 {
+ /**
+ * Create an instance of this class.
+ *
+ * @param { import('./player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ *
+ * @param { import('./utils/dom').ContentDescriptor} [options.content=undefined]
+ * Provide customized content for this modal.
+ *
+ * @param {string} [options.description]
+ * A text description for the modal, primarily for accessibility.
+ *
+ * @param {boolean} [options.fillAlways=false]
+ * Normally, modals are automatically filled only the first time
+ * they open. This tells the modal to refresh its content
+ * every time it opens.
+ *
+ * @param {string} [options.label]
+ * A text label for the modal, primarily for accessibility.
+ *
+ * @param {boolean} [options.pauseOnOpen=true]
+ * If `true`, playback will will be paused if playing when
+ * the modal opens, and resumed when it closes.
+ *
+ * @param {boolean} [options.temporary=true]
+ * If `true`, the modal can only be opened once; it will be
+ * disposed as soon as it's closed.
+ *
+ * @param {boolean} [options.uncloseable=false]
+ * If `true`, the user will not be able to close the modal
+ * through the UI in the normal ways. Programmatic closing is
+ * still possible.
+ */
+ constructor(player, options) {
+ super(player, options);
+ this.handleKeyDown_ = e => this.handleKeyDown(e);
+ this.close_ = e => this.close(e);
+ this.opened_ = this.hasBeenOpened_ = this.hasBeenFilled_ = false;
+ this.closeable(!this.options_.uncloseable);
+ this.content(this.options_.content);
+
+ // Make sure the contentEl is defined AFTER any children are initialized
+ // because we only want the contents of the modal in the contentEl
+ // (not the UI elements like the close button).
+ this.contentEl_ = createEl('div', {
+ className: `${MODAL_CLASS_NAME}-content`
+ }, {
+ role: 'document'
+ });
+ this.descEl_ = createEl('p', {
+ className: `${MODAL_CLASS_NAME}-description vjs-control-text`,
+ id: this.el().getAttribute('aria-describedby')
+ });
+ textContent(this.descEl_, this.description());
+ this.el_.appendChild(this.descEl_);
+ this.el_.appendChild(this.contentEl_);
+ }
+
+ /**
+ * Create the `ModalDialog`'s DOM element
+ *
+ * @return {Element}
+ * The DOM element that gets created.
+ */
+ createEl() {
+ return super.createEl('div', {
+ className: this.buildCSSClass(),
+ tabIndex: -1
+ }, {
+ 'aria-describedby': `${this.id()}_description`,
+ 'aria-hidden': 'true',
+ 'aria-label': this.label(),
+ 'role': 'dialog',
+ 'aria-live': 'polite'
+ });
+ }
+ dispose() {
+ this.contentEl_ = null;
+ this.descEl_ = null;
+ this.previouslyActiveEl_ = null;
+ super.dispose();
+ }
+
+ /**
+ * Builds the default DOM `className`.
+ *
+ * @return {string}
+ * The DOM `className` for this object.
+ */
+ buildCSSClass() {
+ return `${MODAL_CLASS_NAME} vjs-hidden ${super.buildCSSClass()}`;
+ }
+
+ /**
+ * Returns the label string for this modal. Primarily used for accessibility.
+ *
+ * @return {string}
+ * the localized or raw label of this modal.
+ */
+ label() {
+ return this.localize(this.options_.label || 'Modal Window');
+ }
+
+ /**
+ * Returns the description string for this modal. Primarily used for
+ * accessibility.
+ *
+ * @return {string}
+ * The localized or raw description of this modal.
+ */
+ description() {
+ let desc = this.options_.description || this.localize('This is a modal window.');
+
+ // Append a universal closeability message if the modal is closeable.
+ if (this.closeable()) {
+ desc += ' ' + this.localize('This modal can be closed by pressing the Escape key or activating the close button.');
+ }
+ return desc;
+ }
+
+ /**
+ * Opens the modal.
+ *
+ * @fires ModalDialog#beforemodalopen
+ * @fires ModalDialog#modalopen
+ */
+ open() {
+ if (this.opened_) {
+ if (this.options_.fillAlways) {
+ this.fill();
+ }
+ return;
+ }
+ const player = this.player();
+
+ /**
+ * Fired just before a `ModalDialog` is opened.
+ *
+ * @event ModalDialog#beforemodalopen
+ * @type {Event}
+ */
+ this.trigger('beforemodalopen');
+ this.opened_ = true;
+
+ // Fill content if the modal has never opened before and
+ // never been filled.
+ if (this.options_.fillAlways || !this.hasBeenOpened_ && !this.hasBeenFilled_) {
+ this.fill();
+ }
+
+ // If the player was playing, pause it and take note of its previously
+ // playing state.
+ this.wasPlaying_ = !player.paused();
+ if (this.options_.pauseOnOpen && this.wasPlaying_) {
+ player.pause();
+ }
+ this.on('keydown', this.handleKeyDown_);
+
+ // Hide controls and note if they were enabled.
+ this.hadControls_ = player.controls();
+ player.controls(false);
+ this.show();
+ this.conditionalFocus_();
+ this.el().setAttribute('aria-hidden', 'false');
+
+ /**
+ * Fired just after a `ModalDialog` is opened.
+ *
+ * @event ModalDialog#modalopen
+ * @type {Event}
+ */
+ this.trigger('modalopen');
+ this.hasBeenOpened_ = true;
+ }
+
+ /**
+ * If the `ModalDialog` is currently open or closed.
+ *
+ * @param {boolean} [value]
+ * If given, it will open (`true`) or close (`false`) the modal.
+ *
+ * @return {boolean}
+ * the current open state of the modaldialog
+ */
+ opened(value) {
+ if (typeof value === 'boolean') {
+ this[value ? 'open' : 'close']();
+ }
+ return this.opened_;
+ }
+
+ /**
+ * Closes the modal, does nothing if the `ModalDialog` is
+ * not open.
+ *
+ * @fires ModalDialog#beforemodalclose
+ * @fires ModalDialog#modalclose
+ */
+ close() {
+ if (!this.opened_) {
+ return;
+ }
+ const player = this.player();
+
+ /**
+ * Fired just before a `ModalDialog` is closed.
+ *
+ * @event ModalDialog#beforemodalclose
+ * @type {Event}
+ */
+ this.trigger('beforemodalclose');
+ this.opened_ = false;
+ if (this.wasPlaying_ && this.options_.pauseOnOpen) {
+ player.play();
+ }
+ this.off('keydown', this.handleKeyDown_);
+ if (this.hadControls_) {
+ player.controls(true);
+ }
+ this.hide();
+ this.el().setAttribute('aria-hidden', 'true');
+
+ /**
+ * Fired just after a `ModalDialog` is closed.
+ *
+ * @event ModalDialog#modalclose
+ * @type {Event}
+ */
+ this.trigger('modalclose');
+ this.conditionalBlur_();
+ if (this.options_.temporary) {
+ this.dispose();
+ }
+ }
+
+ /**
+ * Check to see if the `ModalDialog` is closeable via the UI.
+ *
+ * @param {boolean} [value]
+ * If given as a boolean, it will set the `closeable` option.
+ *
+ * @return {boolean}
+ * Returns the final value of the closable option.
+ */
+ closeable(value) {
+ if (typeof value === 'boolean') {
+ const closeable = this.closeable_ = !!value;
+ let close = this.getChild('closeButton');
+
+ // If this is being made closeable and has no close button, add one.
+ if (closeable && !close) {
+ // The close button should be a child of the modal - not its
+ // content element, so temporarily change the content element.
+ const temp = this.contentEl_;
+ this.contentEl_ = this.el_;
+ close = this.addChild('closeButton', {
+ controlText: 'Close Modal Dialog'
+ });
+ this.contentEl_ = temp;
+ this.on(close, 'close', this.close_);
+ }
+
+ // If this is being made uncloseable and has a close button, remove it.
+ if (!closeable && close) {
+ this.off(close, 'close', this.close_);
+ this.removeChild(close);
+ close.dispose();
+ }
+ }
+ return this.closeable_;
+ }
+
+ /**
+ * Fill the modal's content element with the modal's "content" option.
+ * The content element will be emptied before this change takes place.
+ */
+ fill() {
+ this.fillWith(this.content());
+ }
+
+ /**
+ * Fill the modal's content element with arbitrary content.
+ * The content element will be emptied before this change takes place.
+ *
+ * @fires ModalDialog#beforemodalfill
+ * @fires ModalDialog#modalfill
+ *
+ * @param { import('./utils/dom').ContentDescriptor} [content]
+ * The same rules apply to this as apply to the `content` option.
+ */
+ fillWith(content) {
+ const contentEl = this.contentEl();
+ const parentEl = contentEl.parentNode;
+ const nextSiblingEl = contentEl.nextSibling;
+
+ /**
+ * Fired just before a `ModalDialog` is filled with content.
+ *
+ * @event ModalDialog#beforemodalfill
+ * @type {Event}
+ */
+ this.trigger('beforemodalfill');
+ this.hasBeenFilled_ = true;
+
+ // Detach the content element from the DOM before performing
+ // manipulation to avoid modifying the live DOM multiple times.
+ parentEl.removeChild(contentEl);
+ this.empty();
+ insertContent(contentEl, content);
+ /**
+ * Fired just after a `ModalDialog` is filled with content.
+ *
+ * @event ModalDialog#modalfill
+ * @type {Event}
+ */
+ this.trigger('modalfill');
+
+ // Re-inject the re-filled content element.
+ if (nextSiblingEl) {
+ parentEl.insertBefore(contentEl, nextSiblingEl);
+ } else {
+ parentEl.appendChild(contentEl);
+ }
+
+ // make sure that the close button is last in the dialog DOM
+ const closeButton = this.getChild('closeButton');
+ if (closeButton) {
+ parentEl.appendChild(closeButton.el_);
+ }
+ }
+
+ /**
+ * Empties the content element. This happens anytime the modal is filled.
+ *
+ * @fires ModalDialog#beforemodalempty
+ * @fires ModalDialog#modalempty
+ */
+ empty() {
+ /**
+ * Fired just before a `ModalDialog` is emptied.
+ *
+ * @event ModalDialog#beforemodalempty
+ * @type {Event}
+ */
+ this.trigger('beforemodalempty');
+ emptyEl(this.contentEl());
+
+ /**
+ * Fired just after a `ModalDialog` is emptied.
+ *
+ * @event ModalDialog#modalempty
+ * @type {Event}
+ */
+ this.trigger('modalempty');
+ }
+
+ /**
+ * Gets or sets the modal content, which gets normalized before being
+ * rendered into the DOM.
+ *
+ * This does not update the DOM or fill the modal, but it is called during
+ * that process.
+ *
+ * @param { import('./utils/dom').ContentDescriptor} [value]
+ * If defined, sets the internal content value to be used on the
+ * next call(s) to `fill`. This value is normalized before being
+ * inserted. To "clear" the internal content value, pass `null`.
+ *
+ * @return { import('./utils/dom').ContentDescriptor}
+ * The current content of the modal dialog
+ */
+ content(value) {
+ if (typeof value !== 'undefined') {
+ this.content_ = value;
+ }
+ return this.content_;
+ }
+
+ /**
+ * conditionally focus the modal dialog if focus was previously on the player.
+ *
+ * @private
+ */
+ conditionalFocus_() {
+ const activeEl = document.activeElement;
+ const playerEl = this.player_.el_;
+ this.previouslyActiveEl_ = null;
+ if (playerEl.contains(activeEl) || playerEl === activeEl) {
+ this.previouslyActiveEl_ = activeEl;
+ this.focus();
+ }
+ }
+
+ /**
+ * conditionally blur the element and refocus the last focused element
+ *
+ * @private
+ */
+ conditionalBlur_() {
+ if (this.previouslyActiveEl_) {
+ this.previouslyActiveEl_.focus();
+ this.previouslyActiveEl_ = null;
+ }
+ }
+
+ /**
+ * Keydown handler. Attached when modal is focused.
+ *
+ * @listens keydown
+ */
+ handleKeyDown(event) {
+ // Do not allow keydowns to reach out of the modal dialog.
+ event.stopPropagation();
+ if (keycode.isEventKey(event, 'Escape') && this.closeable()) {
+ event.preventDefault();
+ this.close();
+ return;
+ }
+
+ // exit early if it isn't a tab key
+ if (!keycode.isEventKey(event, 'Tab')) {
+ return;
+ }
+ const focusableEls = this.focusableEls_();
+ const activeEl = this.el_.querySelector(':focus');
+ let focusIndex;
+ for (let i = 0; i < focusableEls.length; i++) {
+ if (activeEl === focusableEls[i]) {
+ focusIndex = i;
+ break;
+ }
+ }
+ if (document.activeElement === this.el_) {
+ focusIndex = 0;
+ }
+ if (event.shiftKey && focusIndex === 0) {
+ focusableEls[focusableEls.length - 1].focus();
+ event.preventDefault();
+ } else if (!event.shiftKey && focusIndex === focusableEls.length - 1) {
+ focusableEls[0].focus();
+ event.preventDefault();
+ }
+ }
+
+ /**
+ * get all focusable elements
+ *
+ * @private
+ */
+ focusableEls_() {
+ const allChildren = this.el_.querySelectorAll('*');
+ return Array.prototype.filter.call(allChildren, child => {
+ return (child instanceof window.HTMLAnchorElement || child instanceof window.HTMLAreaElement) && child.hasAttribute('href') || (child instanceof window.HTMLInputElement || child instanceof window.HTMLSelectElement || child instanceof window.HTMLTextAreaElement || child instanceof window.HTMLButtonElement) && !child.hasAttribute('disabled') || child instanceof window.HTMLIFrameElement || child instanceof window.HTMLObjectElement || child instanceof window.HTMLEmbedElement || child.hasAttribute('tabindex') && child.getAttribute('tabindex') !== -1 || child.hasAttribute('contenteditable');
+ });
+ }
+ }
+
+ /**
+ * Default options for `ModalDialog` default options.
+ *
+ * @type {Object}
+ * @private
+ */
+ ModalDialog.prototype.options_ = {
+ pauseOnOpen: true,
+ temporary: true
+ };
+ Component$1.registerComponent('ModalDialog', ModalDialog);
+
+ /**
+ * @file track-list.js
+ */
+
+ /**
+ * Common functionaliy between {@link TextTrackList}, {@link AudioTrackList}, and
+ * {@link VideoTrackList}
+ *
+ * @extends EventTarget
+ */
+ class TrackList extends EventTarget$2 {
+ /**
+ * Create an instance of this class
+ *
+ * @param { import('./track').default[] } tracks
+ * A list of tracks to initialize the list with.
+ *
+ * @abstract
+ */
+ constructor(tracks = []) {
+ super();
+ this.tracks_ = [];
+
+ /**
+ * @memberof TrackList
+ * @member {number} length
+ * The current number of `Track`s in the this Trackist.
+ * @instance
+ */
+ Object.defineProperty(this, 'length', {
+ get() {
+ return this.tracks_.length;
+ }
+ });
+ for (let i = 0; i < tracks.length; i++) {
+ this.addTrack(tracks[i]);
+ }
+ }
+
+ /**
+ * Add a {@link Track} to the `TrackList`
+ *
+ * @param { import('./track').default } track
+ * The audio, video, or text track to add to the list.
+ *
+ * @fires TrackList#addtrack
+ */
+ addTrack(track) {
+ const index = this.tracks_.length;
+ if (!('' + index in this)) {
+ Object.defineProperty(this, index, {
+ get() {
+ return this.tracks_[index];
+ }
+ });
+ }
+
+ // Do not add duplicate tracks
+ if (this.tracks_.indexOf(track) === -1) {
+ this.tracks_.push(track);
+ /**
+ * Triggered when a track is added to a track list.
+ *
+ * @event TrackList#addtrack
+ * @type {Event}
+ * @property {Track} track
+ * A reference to track that was added.
+ */
+ this.trigger({
+ track,
+ type: 'addtrack',
+ target: this
+ });
+ }
+
+ /**
+ * Triggered when a track label is changed.
+ *
+ * @event TrackList#addtrack
+ * @type {Event}
+ * @property {Track} track
+ * A reference to track that was added.
+ */
+ track.labelchange_ = () => {
+ this.trigger({
+ track,
+ type: 'labelchange',
+ target: this
+ });
+ };
+ if (isEvented(track)) {
+ track.addEventListener('labelchange', track.labelchange_);
+ }
+ }
+
+ /**
+ * Remove a {@link Track} from the `TrackList`
+ *
+ * @param { import('./track').default } rtrack
+ * The audio, video, or text track to remove from the list.
+ *
+ * @fires TrackList#removetrack
+ */
+ removeTrack(rtrack) {
+ let track;
+ for (let i = 0, l = this.length; i < l; i++) {
+ if (this[i] === rtrack) {
+ track = this[i];
+ if (track.off) {
+ track.off();
+ }
+ this.tracks_.splice(i, 1);
+ break;
+ }
+ }
+ if (!track) {
+ return;
+ }
+
+ /**
+ * Triggered when a track is removed from track list.
+ *
+ * @event TrackList#removetrack
+ * @type {Event}
+ * @property {Track} track
+ * A reference to track that was removed.
+ */
+ this.trigger({
+ track,
+ type: 'removetrack',
+ target: this
+ });
+ }
+
+ /**
+ * Get a Track from the TrackList by a tracks id
+ *
+ * @param {string} id - the id of the track to get
+ * @method getTrackById
+ * @return { import('./track').default }
+ * @private
+ */
+ getTrackById(id) {
+ let result = null;
+ for (let i = 0, l = this.length; i < l; i++) {
+ const track = this[i];
+ if (track.id === id) {
+ result = track;
+ break;
+ }
+ }
+ return result;
+ }
+ }
+
+ /**
+ * Triggered when a different track is selected/enabled.
+ *
+ * @event TrackList#change
+ * @type {Event}
+ */
+
+ /**
+ * Events that can be called with on + eventName. See {@link EventHandler}.
+ *
+ * @property {Object} TrackList#allowedEvents_
+ * @protected
+ */
+ TrackList.prototype.allowedEvents_ = {
+ change: 'change',
+ addtrack: 'addtrack',
+ removetrack: 'removetrack',
+ labelchange: 'labelchange'
+ };
+
+ // emulate attribute EventHandler support to allow for feature detection
+ for (const event in TrackList.prototype.allowedEvents_) {
+ TrackList.prototype['on' + event] = null;
+ }
+
+ /**
+ * @file audio-track-list.js
+ */
+
+ /**
+ * Anywhere we call this function we diverge from the spec
+ * as we only support one enabled audiotrack at a time
+ *
+ * @param {AudioTrackList} list
+ * list to work on
+ *
+ * @param { import('./audio-track').default } track
+ * The track to skip
+ *
+ * @private
+ */
+ const disableOthers$1 = function (list, track) {
+ for (let i = 0; i < list.length; i++) {
+ if (!Object.keys(list[i]).length || track.id === list[i].id) {
+ continue;
+ }
+ // another audio track is enabled, disable it
+ list[i].enabled = false;
+ }
+ };
+
+ /**
+ * The current list of {@link AudioTrack} for a media file.
+ *
+ * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#audiotracklist}
+ * @extends TrackList
+ */
+ class AudioTrackList extends TrackList {
+ /**
+ * Create an instance of this class.
+ *
+ * @param { import('./audio-track').default[] } [tracks=[]]
+ * A list of `AudioTrack` to instantiate the list with.
+ */
+ constructor(tracks = []) {
+ // make sure only 1 track is enabled
+ // sorted from last index to first index
+ for (let i = tracks.length - 1; i >= 0; i--) {
+ if (tracks[i].enabled) {
+ disableOthers$1(tracks, tracks[i]);
+ break;
+ }
+ }
+ super(tracks);
+ this.changing_ = false;
+ }
+
+ /**
+ * Add an {@link AudioTrack} to the `AudioTrackList`.
+ *
+ * @param { import('./audio-track').default } track
+ * The AudioTrack to add to the list
+ *
+ * @fires TrackList#addtrack
+ */
+ addTrack(track) {
+ if (track.enabled) {
+ disableOthers$1(this, track);
+ }
+ super.addTrack(track);
+ // native tracks don't have this
+ if (!track.addEventListener) {
+ return;
+ }
+ track.enabledChange_ = () => {
+ // when we are disabling other tracks (since we don't support
+ // more than one track at a time) we will set changing_
+ // to true so that we don't trigger additional change events
+ if (this.changing_) {
+ return;
+ }
+ this.changing_ = true;
+ disableOthers$1(this, track);
+ this.changing_ = false;
+ this.trigger('change');
+ };
+
+ /**
+ * @listens AudioTrack#enabledchange
+ * @fires TrackList#change
+ */
+ track.addEventListener('enabledchange', track.enabledChange_);
+ }
+ removeTrack(rtrack) {
+ super.removeTrack(rtrack);
+ if (rtrack.removeEventListener && rtrack.enabledChange_) {
+ rtrack.removeEventListener('enabledchange', rtrack.enabledChange_);
+ rtrack.enabledChange_ = null;
+ }
+ }
+ }
+
+ /**
+ * @file video-track-list.js
+ */
+
+ /**
+ * Un-select all other {@link VideoTrack}s that are selected.
+ *
+ * @param {VideoTrackList} list
+ * list to work on
+ *
+ * @param { import('./video-track').default } track
+ * The track to skip
+ *
+ * @private
+ */
+ const disableOthers = function (list, track) {
+ for (let i = 0; i < list.length; i++) {
+ if (!Object.keys(list[i]).length || track.id === list[i].id) {
+ continue;
+ }
+ // another video track is enabled, disable it
+ list[i].selected = false;
+ }
+ };
+
+ /**
+ * The current list of {@link VideoTrack} for a video.
+ *
+ * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#videotracklist}
+ * @extends TrackList
+ */
+ class VideoTrackList extends TrackList {
+ /**
+ * Create an instance of this class.
+ *
+ * @param {VideoTrack[]} [tracks=[]]
+ * A list of `VideoTrack` to instantiate the list with.
+ */
+ constructor(tracks = []) {
+ // make sure only 1 track is enabled
+ // sorted from last index to first index
+ for (let i = tracks.length - 1; i >= 0; i--) {
+ if (tracks[i].selected) {
+ disableOthers(tracks, tracks[i]);
+ break;
+ }
+ }
+ super(tracks);
+ this.changing_ = false;
+
+ /**
+ * @member {number} VideoTrackList#selectedIndex
+ * The current index of the selected {@link VideoTrack`}.
+ */
+ Object.defineProperty(this, 'selectedIndex', {
+ get() {
+ for (let i = 0; i < this.length; i++) {
+ if (this[i].selected) {
+ return i;
+ }
+ }
+ return -1;
+ },
+ set() {}
+ });
+ }
+
+ /**
+ * Add a {@link VideoTrack} to the `VideoTrackList`.
+ *
+ * @param { import('./video-track').default } track
+ * The VideoTrack to add to the list
+ *
+ * @fires TrackList#addtrack
+ */
+ addTrack(track) {
+ if (track.selected) {
+ disableOthers(this, track);
+ }
+ super.addTrack(track);
+ // native tracks don't have this
+ if (!track.addEventListener) {
+ return;
+ }
+ track.selectedChange_ = () => {
+ if (this.changing_) {
+ return;
+ }
+ this.changing_ = true;
+ disableOthers(this, track);
+ this.changing_ = false;
+ this.trigger('change');
+ };
+
+ /**
+ * @listens VideoTrack#selectedchange
+ * @fires TrackList#change
+ */
+ track.addEventListener('selectedchange', track.selectedChange_);
+ }
+ removeTrack(rtrack) {
+ super.removeTrack(rtrack);
+ if (rtrack.removeEventListener && rtrack.selectedChange_) {
+ rtrack.removeEventListener('selectedchange', rtrack.selectedChange_);
+ rtrack.selectedChange_ = null;
+ }
+ }
+ }
+
+ /**
+ * @file text-track-list.js
+ */
+
+ /**
+ * The current list of {@link TextTrack} for a media file.
+ *
+ * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#texttracklist}
+ * @extends TrackList
+ */
+ class TextTrackList extends TrackList {
+ /**
+ * Add a {@link TextTrack} to the `TextTrackList`
+ *
+ * @param { import('./text-track').default } track
+ * The text track to add to the list.
+ *
+ * @fires TrackList#addtrack
+ */
+ addTrack(track) {
+ super.addTrack(track);
+ if (!this.queueChange_) {
+ this.queueChange_ = () => this.queueTrigger('change');
+ }
+ if (!this.triggerSelectedlanguagechange) {
+ this.triggerSelectedlanguagechange_ = () => this.trigger('selectedlanguagechange');
+ }
+
+ /**
+ * @listens TextTrack#modechange
+ * @fires TrackList#change
+ */
+ track.addEventListener('modechange', this.queueChange_);
+ const nonLanguageTextTrackKind = ['metadata', 'chapters'];
+ if (nonLanguageTextTrackKind.indexOf(track.kind) === -1) {
+ track.addEventListener('modechange', this.triggerSelectedlanguagechange_);
+ }
+ }
+ removeTrack(rtrack) {
+ super.removeTrack(rtrack);
+
+ // manually remove the event handlers we added
+ if (rtrack.removeEventListener) {
+ if (this.queueChange_) {
+ rtrack.removeEventListener('modechange', this.queueChange_);
+ }
+ if (this.selectedlanguagechange_) {
+ rtrack.removeEventListener('modechange', this.triggerSelectedlanguagechange_);
+ }
+ }
+ }
+ }
+
+ /**
+ * @file html-track-element-list.js
+ */
+
+ /**
+ * The current list of {@link HtmlTrackElement}s.
+ */
+ class HtmlTrackElementList {
+ /**
+ * Create an instance of this class.
+ *
+ * @param {HtmlTrackElement[]} [tracks=[]]
+ * A list of `HtmlTrackElement` to instantiate the list with.
+ */
+ constructor(trackElements = []) {
+ this.trackElements_ = [];
+
+ /**
+ * @memberof HtmlTrackElementList
+ * @member {number} length
+ * The current number of `Track`s in the this Trackist.
+ * @instance
+ */
+ Object.defineProperty(this, 'length', {
+ get() {
+ return this.trackElements_.length;
+ }
+ });
+ for (let i = 0, length = trackElements.length; i < length; i++) {
+ this.addTrackElement_(trackElements[i]);
+ }
+ }
+
+ /**
+ * Add an {@link HtmlTrackElement} to the `HtmlTrackElementList`
+ *
+ * @param {HtmlTrackElement} trackElement
+ * The track element to add to the list.
+ *
+ * @private
+ */
+ addTrackElement_(trackElement) {
+ const index = this.trackElements_.length;
+ if (!('' + index in this)) {
+ Object.defineProperty(this, index, {
+ get() {
+ return this.trackElements_[index];
+ }
+ });
+ }
+
+ // Do not add duplicate elements
+ if (this.trackElements_.indexOf(trackElement) === -1) {
+ this.trackElements_.push(trackElement);
+ }
+ }
+
+ /**
+ * Get an {@link HtmlTrackElement} from the `HtmlTrackElementList` given an
+ * {@link TextTrack}.
+ *
+ * @param {TextTrack} track
+ * The track associated with a track element.
+ *
+ * @return {HtmlTrackElement|undefined}
+ * The track element that was found or undefined.
+ *
+ * @private
+ */
+ getTrackElementByTrack_(track) {
+ let trackElement_;
+ for (let i = 0, length = this.trackElements_.length; i < length; i++) {
+ if (track === this.trackElements_[i].track) {
+ trackElement_ = this.trackElements_[i];
+ break;
+ }
+ }
+ return trackElement_;
+ }
+
+ /**
+ * Remove a {@link HtmlTrackElement} from the `HtmlTrackElementList`
+ *
+ * @param {HtmlTrackElement} trackElement
+ * The track element to remove from the list.
+ *
+ * @private
+ */
+ removeTrackElement_(trackElement) {
+ for (let i = 0, length = this.trackElements_.length; i < length; i++) {
+ if (trackElement === this.trackElements_[i]) {
+ if (this.trackElements_[i].track && typeof this.trackElements_[i].track.off === 'function') {
+ this.trackElements_[i].track.off();
+ }
+ if (typeof this.trackElements_[i].off === 'function') {
+ this.trackElements_[i].off();
+ }
+ this.trackElements_.splice(i, 1);
+ break;
+ }
+ }
+ }
+ }
+
+ /**
+ * @file text-track-cue-list.js
+ */
+
+ /**
+ * @typedef {Object} TextTrackCueList~TextTrackCue
+ *
+ * @property {string} id
+ * The unique id for this text track cue
+ *
+ * @property {number} startTime
+ * The start time for this text track cue
+ *
+ * @property {number} endTime
+ * The end time for this text track cue
+ *
+ * @property {boolean} pauseOnExit
+ * Pause when the end time is reached if true.
+ *
+ * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#texttrackcue}
+ */
+
+ /**
+ * A List of TextTrackCues.
+ *
+ * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#texttrackcuelist}
+ */
+ class TextTrackCueList {
+ /**
+ * Create an instance of this class..
+ *
+ * @param {Array} cues
+ * A list of cues to be initialized with
+ */
+ constructor(cues) {
+ TextTrackCueList.prototype.setCues_.call(this, cues);
+
+ /**
+ * @memberof TextTrackCueList
+ * @member {number} length
+ * The current number of `TextTrackCue`s in the TextTrackCueList.
+ * @instance
+ */
+ Object.defineProperty(this, 'length', {
+ get() {
+ return this.length_;
+ }
+ });
+ }
+
+ /**
+ * A setter for cues in this list. Creates getters
+ * an an index for the cues.
+ *
+ * @param {Array} cues
+ * An array of cues to set
+ *
+ * @private
+ */
+ setCues_(cues) {
+ const oldLength = this.length || 0;
+ let i = 0;
+ const l = cues.length;
+ this.cues_ = cues;
+ this.length_ = cues.length;
+ const defineProp = function (index) {
+ if (!('' + index in this)) {
+ Object.defineProperty(this, '' + index, {
+ get() {
+ return this.cues_[index];
+ }
+ });
+ }
+ };
+ if (oldLength < l) {
+ i = oldLength;
+ for (; i < l; i++) {
+ defineProp.call(this, i);
+ }
+ }
+ }
+
+ /**
+ * Get a `TextTrackCue` that is currently in the `TextTrackCueList` by id.
+ *
+ * @param {string} id
+ * The id of the cue that should be searched for.
+ *
+ * @return {TextTrackCueList~TextTrackCue|null}
+ * A single cue or null if none was found.
+ */
+ getCueById(id) {
+ let result = null;
+ for (let i = 0, l = this.length; i < l; i++) {
+ const cue = this[i];
+ if (cue.id === id) {
+ result = cue;
+ break;
+ }
+ }
+ return result;
+ }
+ }
+
+ /**
+ * @file track-kinds.js
+ */
+
+ /**
+ * All possible `VideoTrackKind`s
+ *
+ * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-videotrack-kind
+ * @typedef VideoTrack~Kind
+ * @enum
+ */
+ const VideoTrackKind = {
+ alternative: 'alternative',
+ captions: 'captions',
+ main: 'main',
+ sign: 'sign',
+ subtitles: 'subtitles',
+ commentary: 'commentary'
+ };
+
+ /**
+ * All possible `AudioTrackKind`s
+ *
+ * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-audiotrack-kind
+ * @typedef AudioTrack~Kind
+ * @enum
+ */
+ const AudioTrackKind = {
+ 'alternative': 'alternative',
+ 'descriptions': 'descriptions',
+ 'main': 'main',
+ 'main-desc': 'main-desc',
+ 'translation': 'translation',
+ 'commentary': 'commentary'
+ };
+
+ /**
+ * All possible `TextTrackKind`s
+ *
+ * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-texttrack-kind
+ * @typedef TextTrack~Kind
+ * @enum
+ */
+ const TextTrackKind = {
+ subtitles: 'subtitles',
+ captions: 'captions',
+ descriptions: 'descriptions',
+ chapters: 'chapters',
+ metadata: 'metadata'
+ };
+
+ /**
+ * All possible `TextTrackMode`s
+ *
+ * @see https://html.spec.whatwg.org/multipage/embedded-content.html#texttrackmode
+ * @typedef TextTrack~Mode
+ * @enum
+ */
+ const TextTrackMode = {
+ disabled: 'disabled',
+ hidden: 'hidden',
+ showing: 'showing'
+ };
+
+ /**
+ * @file track.js
+ */
+
+ /**
+ * A Track class that contains all of the common functionality for {@link AudioTrack},
+ * {@link VideoTrack}, and {@link TextTrack}.
+ *
+ * > Note: This class should not be used directly
+ *
+ * @see {@link https://html.spec.whatwg.org/multipage/embedded-content.html}
+ * @extends EventTarget
+ * @abstract
+ */
+ class Track extends EventTarget$2 {
+ /**
+ * Create an instance of this class.
+ *
+ * @param {Object} [options={}]
+ * Object of option names and values
+ *
+ * @param {string} [options.kind='']
+ * A valid kind for the track type you are creating.
+ *
+ * @param {string} [options.id='vjs_track_' + Guid.newGUID()]
+ * A unique id for this AudioTrack.
+ *
+ * @param {string} [options.label='']
+ * The menu label for this track.
+ *
+ * @param {string} [options.language='']
+ * A valid two character language code.
+ *
+ * @abstract
+ */
+ constructor(options = {}) {
+ super();
+ const trackProps = {
+ id: options.id || 'vjs_track_' + newGUID(),
+ kind: options.kind || '',
+ language: options.language || ''
+ };
+ let label = options.label || '';
+
+ /**
+ * @memberof Track
+ * @member {string} id
+ * The id of this track. Cannot be changed after creation.
+ * @instance
+ *
+ * @readonly
+ */
+
+ /**
+ * @memberof Track
+ * @member {string} kind
+ * The kind of track that this is. Cannot be changed after creation.
+ * @instance
+ *
+ * @readonly
+ */
+
+ /**
+ * @memberof Track
+ * @member {string} language
+ * The two letter language code for this track. Cannot be changed after
+ * creation.
+ * @instance
+ *
+ * @readonly
+ */
+
+ for (const key in trackProps) {
+ Object.defineProperty(this, key, {
+ get() {
+ return trackProps[key];
+ },
+ set() {}
+ });
+ }
+
+ /**
+ * @memberof Track
+ * @member {string} label
+ * The label of this track. Cannot be changed after creation.
+ * @instance
+ *
+ * @fires Track#labelchange
+ */
+ Object.defineProperty(this, 'label', {
+ get() {
+ return label;
+ },
+ set(newLabel) {
+ if (newLabel !== label) {
+ label = newLabel;
+
+ /**
+ * An event that fires when label changes on this track.
+ *
+ * > Note: This is not part of the spec!
+ *
+ * @event Track#labelchange
+ * @type {Event}
+ */
+ this.trigger('labelchange');
+ }
+ }
+ });
+ }
+ }
+
+ /**
+ * @file url.js
+ * @module url
+ */
+
+ /**
+ * @typedef {Object} url:URLObject
+ *
+ * @property {string} protocol
+ * The protocol of the url that was parsed.
+ *
+ * @property {string} hostname
+ * The hostname of the url that was parsed.
+ *
+ * @property {string} port
+ * The port of the url that was parsed.
+ *
+ * @property {string} pathname
+ * The pathname of the url that was parsed.
+ *
+ * @property {string} search
+ * The search query of the url that was parsed.
+ *
+ * @property {string} hash
+ * The hash of the url that was parsed.
+ *
+ * @property {string} host
+ * The host of the url that was parsed.
+ */
+
+ /**
+ * Resolve and parse the elements of a URL.
+ *
+ * @function
+ * @param {String} url
+ * The url to parse
+ *
+ * @return {url:URLObject}
+ * An object of url details
+ */
+ const parseUrl = function (url) {
+ // This entire method can be replace with URL once we are able to drop IE11
+
+ const props = ['protocol', 'hostname', 'port', 'pathname', 'search', 'hash', 'host'];
+
+ // add the url to an anchor and let the browser parse the URL
+ const a = document.createElement('a');
+ a.href = url;
+
+ // Copy the specific URL properties to a new object
+ // This is also needed for IE because the anchor loses its
+ // properties when it's removed from the dom
+ const details = {};
+ for (let i = 0; i < props.length; i++) {
+ details[props[i]] = a[props[i]];
+ }
+
+ // IE adds the port to the host property unlike everyone else. If
+ // a port identifier is added for standard ports, strip it.
+ if (details.protocol === 'http:') {
+ details.host = details.host.replace(/:80$/, '');
+ }
+ if (details.protocol === 'https:') {
+ details.host = details.host.replace(/:443$/, '');
+ }
+ if (!details.protocol) {
+ details.protocol = window.location.protocol;
+ }
+
+ /* istanbul ignore if */
+ if (!details.host) {
+ details.host = window.location.host;
+ }
+ return details;
+ };
+
+ /**
+ * Get absolute version of relative URL.
+ *
+ * @function
+ * @param {string} url
+ * URL to make absolute
+ *
+ * @return {string}
+ * Absolute URL
+ *
+ * @see http://stackoverflow.com/questions/470832/getting-an-absolute-url-from-a-relative-one-ie6-issue
+ */
+ const getAbsoluteURL = function (url) {
+ // Check if absolute URL
+ if (!url.match(/^https?:\/\//)) {
+ // Add the url to an anchor and let the browser parse it to convert to an absolute url
+ const a = document.createElement('a');
+ a.href = url;
+ url = a.href;
+ }
+ return url;
+ };
+
+ /**
+ * Returns the extension of the passed file name. It will return an empty string
+ * if passed an invalid path.
+ *
+ * @function
+ * @param {string} path
+ * The fileName path like '/path/to/file.mp4'
+ *
+ * @return {string}
+ * The extension in lower case or an empty string if no
+ * extension could be found.
+ */
+ const getFileExtension = function (path) {
+ if (typeof path === 'string') {
+ const splitPathRe = /^(\/?)([\s\S]*?)((?:\.{1,2}|[^\/]+?)(\.([^\.\/\?]+)))(?:[\/]*|[\?].*)$/;
+ const pathParts = splitPathRe.exec(path);
+ if (pathParts) {
+ return pathParts.pop().toLowerCase();
+ }
+ }
+ return '';
+ };
+
+ /**
+ * Returns whether the url passed is a cross domain request or not.
+ *
+ * @function
+ * @param {string} url
+ * The url to check.
+ *
+ * @param {Object} [winLoc]
+ * the domain to check the url against, defaults to window.location
+ *
+ * @param {string} [winLoc.protocol]
+ * The window location protocol defaults to window.location.protocol
+ *
+ * @param {string} [winLoc.host]
+ * The window location host defaults to window.location.host
+ *
+ * @return {boolean}
+ * Whether it is a cross domain request or not.
+ */
+ const isCrossOrigin = function (url, winLoc = window.location) {
+ const urlInfo = parseUrl(url);
+
+ // IE8 protocol relative urls will return ':' for protocol
+ const srcProtocol = urlInfo.protocol === ':' ? winLoc.protocol : urlInfo.protocol;
+
+ // Check if url is for another domain/origin
+ // IE8 doesn't know location.origin, so we won't rely on it here
+ const crossOrigin = srcProtocol + urlInfo.host !== winLoc.protocol + winLoc.host;
+ return crossOrigin;
+ };
+
+ var Url = /*#__PURE__*/Object.freeze({
+ __proto__: null,
+ parseUrl: parseUrl,
+ getAbsoluteURL: getAbsoluteURL,
+ getFileExtension: getFileExtension,
+ isCrossOrigin: isCrossOrigin
+ });
+
+ var win;
+ if (typeof window !== "undefined") {
+ win = window;
+ } else if (typeof commonjsGlobal !== "undefined") {
+ win = commonjsGlobal;
+ } else if (typeof self !== "undefined") {
+ win = self;
+ } else {
+ win = {};
+ }
+ var window_1 = win;
+
+ var _extends_1 = createCommonjsModule(function (module) {
+ function _extends() {
+ module.exports = _extends = Object.assign ? Object.assign.bind() : function (target) {
+ for (var i = 1; i < arguments.length; i++) {
+ var source = arguments[i];
+ for (var key in source) {
+ if (Object.prototype.hasOwnProperty.call(source, key)) {
+ target[key] = source[key];
+ }
+ }
+ }
+ return target;
+ }, module.exports.__esModule = true, module.exports["default"] = module.exports;
+ return _extends.apply(this, arguments);
+ }
+ module.exports = _extends, module.exports.__esModule = true, module.exports["default"] = module.exports;
+ });
+ var _extends$1 = unwrapExports(_extends_1);
+
+ var isFunction_1 = isFunction;
+ var toString = Object.prototype.toString;
+ function isFunction(fn) {
+ if (!fn) {
+ return false;
+ }
+ var string = toString.call(fn);
+ return string === '[object Function]' || typeof fn === 'function' && string !== '[object RegExp]' || typeof window !== 'undefined' && (
+ // IE8 and below
+ fn === window.setTimeout || fn === window.alert || fn === window.confirm || fn === window.prompt);
+ }
+
+ var httpResponseHandler = function httpResponseHandler(callback, decodeResponseBody) {
+ if (decodeResponseBody === void 0) {
+ decodeResponseBody = false;
+ }
+ return function (err, response, responseBody) {
+ // if the XHR failed, return that error
+ if (err) {
+ callback(err);
+ return;
+ } // if the HTTP status code is 4xx or 5xx, the request also failed
+
+ if (response.statusCode >= 400 && response.statusCode <= 599) {
+ var cause = responseBody;
+ if (decodeResponseBody) {
+ if (window_1.TextDecoder) {
+ var charset = getCharset(response.headers && response.headers['content-type']);
+ try {
+ cause = new TextDecoder(charset).decode(responseBody);
+ } catch (e) {}
+ } else {
+ cause = String.fromCharCode.apply(null, new Uint8Array(responseBody));
+ }
+ }
+ callback({
+ cause: cause
+ });
+ return;
+ } // otherwise, request succeeded
+
+ callback(null, responseBody);
+ };
+ };
+ function getCharset(contentTypeHeader) {
+ if (contentTypeHeader === void 0) {
+ contentTypeHeader = '';
+ }
+ return contentTypeHeader.toLowerCase().split(';').reduce(function (charset, contentType) {
+ var _contentType$split = contentType.split('='),
+ type = _contentType$split[0],
+ value = _contentType$split[1];
+ if (type.trim() === 'charset') {
+ return value.trim();
+ }
+ return charset;
+ }, 'utf-8');
+ }
+ var httpHandler = httpResponseHandler;
+
+ createXHR.httpHandler = httpHandler;
+ /**
+ * @license
+ * slighly modified parse-headers 2.0.2 <https://github.com/kesla/parse-headers/>
+ * Copyright (c) 2014 David Björklund
+ * Available under the MIT license
+ * <https://github.com/kesla/parse-headers/blob/master/LICENCE>
+ */
+
+ var parseHeaders = function parseHeaders(headers) {
+ var result = {};
+ if (!headers) {
+ return result;
+ }
+ headers.trim().split('\n').forEach(function (row) {
+ var index = row.indexOf(':');
+ var key = row.slice(0, index).trim().toLowerCase();
+ var value = row.slice(index + 1).trim();
+ if (typeof result[key] === 'undefined') {
+ result[key] = value;
+ } else if (Array.isArray(result[key])) {
+ result[key].push(value);
+ } else {
+ result[key] = [result[key], value];
+ }
+ });
+ return result;
+ };
+ var lib = createXHR; // Allow use of default import syntax in TypeScript
+
+ var default_1 = createXHR;
+ createXHR.XMLHttpRequest = window_1.XMLHttpRequest || noop$1;
+ createXHR.XDomainRequest = "withCredentials" in new createXHR.XMLHttpRequest() ? createXHR.XMLHttpRequest : window_1.XDomainRequest;
+ forEachArray(["get", "put", "post", "patch", "head", "delete"], function (method) {
+ createXHR[method === "delete" ? "del" : method] = function (uri, options, callback) {
+ options = initParams(uri, options, callback);
+ options.method = method.toUpperCase();
+ return _createXHR(options);
+ };
+ });
+ function forEachArray(array, iterator) {
+ for (var i = 0; i < array.length; i++) {
+ iterator(array[i]);
+ }
+ }
+ function isEmpty(obj) {
+ for (var i in obj) {
+ if (obj.hasOwnProperty(i)) return false;
+ }
+ return true;
+ }
+ function initParams(uri, options, callback) {
+ var params = uri;
+ if (isFunction_1(options)) {
+ callback = options;
+ if (typeof uri === "string") {
+ params = {
+ uri: uri
+ };
+ }
+ } else {
+ params = _extends_1({}, options, {
+ uri: uri
+ });
+ }
+ params.callback = callback;
+ return params;
+ }
+ function createXHR(uri, options, callback) {
+ options = initParams(uri, options, callback);
+ return _createXHR(options);
+ }
+ function _createXHR(options) {
+ if (typeof options.callback === "undefined") {
+ throw new Error("callback argument missing");
+ }
+ var called = false;
+ var callback = function cbOnce(err, response, body) {
+ if (!called) {
+ called = true;
+ options.callback(err, response, body);
+ }
+ };
+ function readystatechange() {
+ if (xhr.readyState === 4) {
+ setTimeout(loadFunc, 0);
+ }
+ }
+ function getBody() {
+ // Chrome with requestType=blob throws errors arround when even testing access to responseText
+ var body = undefined;
+ if (xhr.response) {
+ body = xhr.response;
+ } else {
+ body = xhr.responseText || getXml(xhr);
+ }
+ if (isJson) {
+ try {
+ body = JSON.parse(body);
+ } catch (e) {}
+ }
+ return body;
+ }
+ function errorFunc(evt) {
+ clearTimeout(timeoutTimer);
+ if (!(evt instanceof Error)) {
+ evt = new Error("" + (evt || "Unknown XMLHttpRequest Error"));
+ }
+ evt.statusCode = 0;
+ return callback(evt, failureResponse);
+ } // will load the data & process the response in a special response object
+
+ function loadFunc() {
+ if (aborted) return;
+ var status;
+ clearTimeout(timeoutTimer);
+ if (options.useXDR && xhr.status === undefined) {
+ //IE8 CORS GET successful response doesn't have a status field, but body is fine
+ status = 200;
+ } else {
+ status = xhr.status === 1223 ? 204 : xhr.status;
+ }
+ var response = failureResponse;
+ var err = null;
+ if (status !== 0) {
+ response = {
+ body: getBody(),
+ statusCode: status,
+ method: method,
+ headers: {},
+ url: uri,
+ rawRequest: xhr
+ };
+ if (xhr.getAllResponseHeaders) {
+ //remember xhr can in fact be XDR for CORS in IE
+ response.headers = parseHeaders(xhr.getAllResponseHeaders());
+ }
+ } else {
+ err = new Error("Internal XMLHttpRequest Error");
+ }
+ return callback(err, response, response.body);
+ }
+ var xhr = options.xhr || null;
+ if (!xhr) {
+ if (options.cors || options.useXDR) {
+ xhr = new createXHR.XDomainRequest();
+ } else {
+ xhr = new createXHR.XMLHttpRequest();
+ }
+ }
+ var key;
+ var aborted;
+ var uri = xhr.url = options.uri || options.url;
+ var method = xhr.method = options.method || "GET";
+ var body = options.body || options.data;
+ var headers = xhr.headers = options.headers || {};
+ var sync = !!options.sync;
+ var isJson = false;
+ var timeoutTimer;
+ var failureResponse = {
+ body: undefined,
+ headers: {},
+ statusCode: 0,
+ method: method,
+ url: uri,
+ rawRequest: xhr
+ };
+ if ("json" in options && options.json !== false) {
+ isJson = true;
+ headers["accept"] || headers["Accept"] || (headers["Accept"] = "application/json"); //Don't override existing accept header declared by user
+
+ if (method !== "GET" && method !== "HEAD") {
+ headers["content-type"] || headers["Content-Type"] || (headers["Content-Type"] = "application/json"); //Don't override existing accept header declared by user
+
+ body = JSON.stringify(options.json === true ? body : options.json);
+ }
+ }
+ xhr.onreadystatechange = readystatechange;
+ xhr.onload = loadFunc;
+ xhr.onerror = errorFunc; // IE9 must have onprogress be set to a unique function.
+
+ xhr.onprogress = function () {// IE must die
+ };
+ xhr.onabort = function () {
+ aborted = true;
+ };
+ xhr.ontimeout = errorFunc;
+ xhr.open(method, uri, !sync, options.username, options.password); //has to be after open
+
+ if (!sync) {
+ xhr.withCredentials = !!options.withCredentials;
+ } // Cannot set timeout with sync request
+ // not setting timeout on the xhr object, because of old webkits etc. not handling that correctly
+ // both npm's request and jquery 1.x use this kind of timeout, so this is being consistent
+
+ if (!sync && options.timeout > 0) {
+ timeoutTimer = setTimeout(function () {
+ if (aborted) return;
+ aborted = true; //IE9 may still call readystatechange
+
+ xhr.abort("timeout");
+ var e = new Error("XMLHttpRequest timeout");
+ e.code = "ETIMEDOUT";
+ errorFunc(e);
+ }, options.timeout);
+ }
+ if (xhr.setRequestHeader) {
+ for (key in headers) {
+ if (headers.hasOwnProperty(key)) {
+ xhr.setRequestHeader(key, headers[key]);
+ }
+ }
+ } else if (options.headers && !isEmpty(options.headers)) {
+ throw new Error("Headers cannot be set on an XDomainRequest object");
+ }
+ if ("responseType" in options) {
+ xhr.responseType = options.responseType;
+ }
+ if ("beforeSend" in options && typeof options.beforeSend === "function") {
+ options.beforeSend(xhr);
+ } // Microsoft Edge browser sends "undefined" when send is called with undefined value.
+ // XMLHttpRequest spec says to pass null as body to indicate no body
+ // See https://github.com/naugtur/xhr/issues/100.
+
+ xhr.send(body || null);
+ return xhr;
+ }
+ function getXml(xhr) {
+ // xhr.responseXML will throw Exception "InvalidStateError" or "DOMException"
+ // See https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest/responseXML.
+ try {
+ if (xhr.responseType === "document") {
+ return xhr.responseXML;
+ }
+ var firefoxBugTakenEffect = xhr.responseXML && xhr.responseXML.documentElement.nodeName === "parsererror";
+ if (xhr.responseType === "" && !firefoxBugTakenEffect) {
+ return xhr.responseXML;
+ }
+ } catch (e) {}
+ return null;
+ }
+ function noop$1() {}
+ lib.default = default_1;
+
+ /**
+ * @file text-track.js
+ */
+
+ /**
+ * Takes a webvtt file contents and parses it into cues
+ *
+ * @param {string} srcContent
+ * webVTT file contents
+ *
+ * @param {TextTrack} track
+ * TextTrack to add cues to. Cues come from the srcContent.
+ *
+ * @private
+ */
+ const parseCues = function (srcContent, track) {
+ const parser = new window.WebVTT.Parser(window, window.vttjs, window.WebVTT.StringDecoder());
+ const errors = [];
+ parser.oncue = function (cue) {
+ track.addCue(cue);
+ };
+ parser.onparsingerror = function (error) {
+ errors.push(error);
+ };
+ parser.onflush = function () {
+ track.trigger({
+ type: 'loadeddata',
+ target: track
+ });
+ };
+ parser.parse(srcContent);
+ if (errors.length > 0) {
+ if (window.console && window.console.groupCollapsed) {
+ window.console.groupCollapsed(`Text Track parsing errors for ${track.src}`);
+ }
+ errors.forEach(error => log$1.error(error));
+ if (window.console && window.console.groupEnd) {
+ window.console.groupEnd();
+ }
+ }
+ parser.flush();
+ };
+
+ /**
+ * Load a `TextTrack` from a specified url.
+ *
+ * @param {string} src
+ * Url to load track from.
+ *
+ * @param {TextTrack} track
+ * Track to add cues to. Comes from the content at the end of `url`.
+ *
+ * @private
+ */
+ const loadTrack = function (src, track) {
+ const opts = {
+ uri: src
+ };
+ const crossOrigin = isCrossOrigin(src);
+ if (crossOrigin) {
+ opts.cors = crossOrigin;
+ }
+ const withCredentials = track.tech_.crossOrigin() === 'use-credentials';
+ if (withCredentials) {
+ opts.withCredentials = withCredentials;
+ }
+ lib(opts, bind_(this, function (err, response, responseBody) {
+ if (err) {
+ return log$1.error(err, response);
+ }
+ track.loaded_ = true;
+
+ // Make sure that vttjs has loaded, otherwise, wait till it finished loading
+ // NOTE: this is only used for the alt/video.novtt.js build
+ if (typeof window.WebVTT !== 'function') {
+ if (track.tech_) {
+ // to prevent use before define eslint error, we define loadHandler
+ // as a let here
+ track.tech_.any(['vttjsloaded', 'vttjserror'], event => {
+ if (event.type === 'vttjserror') {
+ log$1.error(`vttjs failed to load, stopping trying to process ${track.src}`);
+ return;
+ }
+ return parseCues(responseBody, track);
+ });
+ }
+ } else {
+ parseCues(responseBody, track);
+ }
+ }));
+ };
+
+ /**
+ * A representation of a single `TextTrack`.
+ *
+ * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#texttrack}
+ * @extends Track
+ */
+ class TextTrack extends Track {
+ /**
+ * Create an instance of this class.
+ *
+ * @param {Object} options={}
+ * Object of option names and values
+ *
+ * @param { import('../tech/tech').default } options.tech
+ * A reference to the tech that owns this TextTrack.
+ *
+ * @param {TextTrack~Kind} [options.kind='subtitles']
+ * A valid text track kind.
+ *
+ * @param {TextTrack~Mode} [options.mode='disabled']
+ * A valid text track mode.
+ *
+ * @param {string} [options.id='vjs_track_' + Guid.newGUID()]
+ * A unique id for this TextTrack.
+ *
+ * @param {string} [options.label='']
+ * The menu label for this track.
+ *
+ * @param {string} [options.language='']
+ * A valid two character language code.
+ *
+ * @param {string} [options.srclang='']
+ * A valid two character language code. An alternative, but deprioritized
+ * version of `options.language`
+ *
+ * @param {string} [options.src]
+ * A url to TextTrack cues.
+ *
+ * @param {boolean} [options.default]
+ * If this track should default to on or off.
+ */
+ constructor(options = {}) {
+ if (!options.tech) {
+ throw new Error('A tech was not provided.');
+ }
+ const settings = merge$2(options, {
+ kind: TextTrackKind[options.kind] || 'subtitles',
+ language: options.language || options.srclang || ''
+ });
+ let mode = TextTrackMode[settings.mode] || 'disabled';
+ const default_ = settings.default;
+ if (settings.kind === 'metadata' || settings.kind === 'chapters') {
+ mode = 'hidden';
+ }
+ super(settings);
+ this.tech_ = settings.tech;
+ this.cues_ = [];
+ this.activeCues_ = [];
+ this.preload_ = this.tech_.preloadTextTracks !== false;
+ const cues = new TextTrackCueList(this.cues_);
+ const activeCues = new TextTrackCueList(this.activeCues_);
+ let changed = false;
+ this.timeupdateHandler = bind_(this, function (event = {}) {
+ if (this.tech_.isDisposed()) {
+ return;
+ }
+ if (!this.tech_.isReady_) {
+ if (event.type !== 'timeupdate') {
+ this.rvf_ = this.tech_.requestVideoFrameCallback(this.timeupdateHandler);
+ }
+ return;
+ }
+
+ // Accessing this.activeCues for the side-effects of updating itself
+ // due to its nature as a getter function. Do not remove or cues will
+ // stop updating!
+ // Use the setter to prevent deletion from uglify (pure_getters rule)
+ this.activeCues = this.activeCues;
+ if (changed) {
+ this.trigger('cuechange');
+ changed = false;
+ }
+ if (event.type !== 'timeupdate') {
+ this.rvf_ = this.tech_.requestVideoFrameCallback(this.timeupdateHandler);
+ }
+ });
+ const disposeHandler = () => {
+ this.stopTracking();
+ };
+ this.tech_.one('dispose', disposeHandler);
+ if (mode !== 'disabled') {
+ this.startTracking();
+ }
+ Object.defineProperties(this, {
+ /**
+ * @memberof TextTrack
+ * @member {boolean} default
+ * If this track was set to be on or off by default. Cannot be changed after
+ * creation.
+ * @instance
+ *
+ * @readonly
+ */
+ default: {
+ get() {
+ return default_;
+ },
+ set() {}
+ },
+ /**
+ * @memberof TextTrack
+ * @member {string} mode
+ * Set the mode of this TextTrack to a valid {@link TextTrack~Mode}. Will
+ * not be set if setting to an invalid mode.
+ * @instance
+ *
+ * @fires TextTrack#modechange
+ */
+ mode: {
+ get() {
+ return mode;
+ },
+ set(newMode) {
+ if (!TextTrackMode[newMode]) {
+ return;
+ }
+ if (mode === newMode) {
+ return;
+ }
+ mode = newMode;
+ if (!this.preload_ && mode !== 'disabled' && this.cues.length === 0) {
+ // On-demand load.
+ loadTrack(this.src, this);
+ }
+ this.stopTracking();
+ if (mode !== 'disabled') {
+ this.startTracking();
+ }
+ /**
+ * An event that fires when mode changes on this track. This allows
+ * the TextTrackList that holds this track to act accordingly.
+ *
+ * > Note: This is not part of the spec!
+ *
+ * @event TextTrack#modechange
+ * @type {Event}
+ */
+ this.trigger('modechange');
+ }
+ },
+ /**
+ * @memberof TextTrack
+ * @member {TextTrackCueList} cues
+ * The text track cue list for this TextTrack.
+ * @instance
+ */
+ cues: {
+ get() {
+ if (!this.loaded_) {
+ return null;
+ }
+ return cues;
+ },
+ set() {}
+ },
+ /**
+ * @memberof TextTrack
+ * @member {TextTrackCueList} activeCues
+ * The list text track cues that are currently active for this TextTrack.
+ * @instance
+ */
+ activeCues: {
+ get() {
+ if (!this.loaded_) {
+ return null;
+ }
+
+ // nothing to do
+ if (this.cues.length === 0) {
+ return activeCues;
+ }
+ const ct = this.tech_.currentTime();
+ const active = [];
+ for (let i = 0, l = this.cues.length; i < l; i++) {
+ const cue = this.cues[i];
+ if (cue.startTime <= ct && cue.endTime >= ct) {
+ active.push(cue);
+ }
+ }
+ changed = false;
+ if (active.length !== this.activeCues_.length) {
+ changed = true;
+ } else {
+ for (let i = 0; i < active.length; i++) {
+ if (this.activeCues_.indexOf(active[i]) === -1) {
+ changed = true;
+ }
+ }
+ }
+ this.activeCues_ = active;
+ activeCues.setCues_(this.activeCues_);
+ return activeCues;
+ },
+ // /!\ Keep this setter empty (see the timeupdate handler above)
+ set() {}
+ }
+ });
+ if (settings.src) {
+ this.src = settings.src;
+ if (!this.preload_) {
+ // Tracks will load on-demand.
+ // Act like we're loaded for other purposes.
+ this.loaded_ = true;
+ }
+ if (this.preload_ || settings.kind !== 'subtitles' && settings.kind !== 'captions') {
+ loadTrack(this.src, this);
+ }
+ } else {
+ this.loaded_ = true;
+ }
+ }
+ startTracking() {
+ // More precise cues based on requestVideoFrameCallback with a requestAnimationFram fallback
+ this.rvf_ = this.tech_.requestVideoFrameCallback(this.timeupdateHandler);
+ // Also listen to timeupdate in case rVFC/rAF stops (window in background, audio in video el)
+ this.tech_.on('timeupdate', this.timeupdateHandler);
+ }
+ stopTracking() {
+ if (this.rvf_) {
+ this.tech_.cancelVideoFrameCallback(this.rvf_);
+ this.rvf_ = undefined;
+ }
+ this.tech_.off('timeupdate', this.timeupdateHandler);
+ }
+
+ /**
+ * Add a cue to the internal list of cues.
+ *
+ * @param {TextTrack~Cue} cue
+ * The cue to add to our internal list
+ */
+ addCue(originalCue) {
+ let cue = originalCue;
+
+ // Testing if the cue is a VTTCue in a way that survives minification
+ if (!('getCueAsHTML' in cue)) {
+ cue = new window.vttjs.VTTCue(originalCue.startTime, originalCue.endTime, originalCue.text);
+ for (const prop in originalCue) {
+ if (!(prop in cue)) {
+ cue[prop] = originalCue[prop];
+ }
+ }
+
+ // make sure that `id` is copied over
+ cue.id = originalCue.id;
+ cue.originalCue_ = originalCue;
+ }
+ const tracks = this.tech_.textTracks();
+ for (let i = 0; i < tracks.length; i++) {
+ if (tracks[i] !== this) {
+ tracks[i].removeCue(cue);
+ }
+ }
+ this.cues_.push(cue);
+ this.cues.setCues_(this.cues_);
+ }
+
+ /**
+ * Remove a cue from our internal list
+ *
+ * @param {TextTrack~Cue} removeCue
+ * The cue to remove from our internal list
+ */
+ removeCue(removeCue) {
+ let i = this.cues_.length;
+ while (i--) {
+ const cue = this.cues_[i];
+ if (cue === removeCue || cue.originalCue_ && cue.originalCue_ === removeCue) {
+ this.cues_.splice(i, 1);
+ this.cues.setCues_(this.cues_);
+ break;
+ }
+ }
+ }
+ }
+
+ /**
+ * cuechange - One or more cues in the track have become active or stopped being active.
+ * @protected
+ */
+ TextTrack.prototype.allowedEvents_ = {
+ cuechange: 'cuechange'
+ };
+
+ /**
+ * A representation of a single `AudioTrack`. If it is part of an {@link AudioTrackList}
+ * only one `AudioTrack` in the list will be enabled at a time.
+ *
+ * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#audiotrack}
+ * @extends Track
+ */
+ class AudioTrack extends Track {
+ /**
+ * Create an instance of this class.
+ *
+ * @param {Object} [options={}]
+ * Object of option names and values
+ *
+ * @param {AudioTrack~Kind} [options.kind='']
+ * A valid audio track kind
+ *
+ * @param {string} [options.id='vjs_track_' + Guid.newGUID()]
+ * A unique id for this AudioTrack.
+ *
+ * @param {string} [options.label='']
+ * The menu label for this track.
+ *
+ * @param {string} [options.language='']
+ * A valid two character language code.
+ *
+ * @param {boolean} [options.enabled]
+ * If this track is the one that is currently playing. If this track is part of
+ * an {@link AudioTrackList}, only one {@link AudioTrack} will be enabled.
+ */
+ constructor(options = {}) {
+ const settings = merge$2(options, {
+ kind: AudioTrackKind[options.kind] || ''
+ });
+ super(settings);
+ let enabled = false;
+
+ /**
+ * @memberof AudioTrack
+ * @member {boolean} enabled
+ * If this `AudioTrack` is enabled or not. When setting this will
+ * fire {@link AudioTrack#enabledchange} if the state of enabled is changed.
+ * @instance
+ *
+ * @fires VideoTrack#selectedchange
+ */
+ Object.defineProperty(this, 'enabled', {
+ get() {
+ return enabled;
+ },
+ set(newEnabled) {
+ // an invalid or unchanged value
+ if (typeof newEnabled !== 'boolean' || newEnabled === enabled) {
+ return;
+ }
+ enabled = newEnabled;
+
+ /**
+ * An event that fires when enabled changes on this track. This allows
+ * the AudioTrackList that holds this track to act accordingly.
+ *
+ * > Note: This is not part of the spec! Native tracks will do
+ * this internally without an event.
+ *
+ * @event AudioTrack#enabledchange
+ * @type {Event}
+ */
+ this.trigger('enabledchange');
+ }
+ });
+
+ // if the user sets this track to selected then
+ // set selected to that true value otherwise
+ // we keep it false
+ if (settings.enabled) {
+ this.enabled = settings.enabled;
+ }
+ this.loaded_ = true;
+ }
+ }
+
+ /**
+ * A representation of a single `VideoTrack`.
+ *
+ * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#videotrack}
+ * @extends Track
+ */
+ class VideoTrack extends Track {
+ /**
+ * Create an instance of this class.
+ *
+ * @param {Object} [options={}]
+ * Object of option names and values
+ *
+ * @param {string} [options.kind='']
+ * A valid {@link VideoTrack~Kind}
+ *
+ * @param {string} [options.id='vjs_track_' + Guid.newGUID()]
+ * A unique id for this AudioTrack.
+ *
+ * @param {string} [options.label='']
+ * The menu label for this track.
+ *
+ * @param {string} [options.language='']
+ * A valid two character language code.
+ *
+ * @param {boolean} [options.selected]
+ * If this track is the one that is currently playing.
+ */
+ constructor(options = {}) {
+ const settings = merge$2(options, {
+ kind: VideoTrackKind[options.kind] || ''
+ });
+ super(settings);
+ let selected = false;
+
+ /**
+ * @memberof VideoTrack
+ * @member {boolean} selected
+ * If this `VideoTrack` is selected or not. When setting this will
+ * fire {@link VideoTrack#selectedchange} if the state of selected changed.
+ * @instance
+ *
+ * @fires VideoTrack#selectedchange
+ */
+ Object.defineProperty(this, 'selected', {
+ get() {
+ return selected;
+ },
+ set(newSelected) {
+ // an invalid or unchanged value
+ if (typeof newSelected !== 'boolean' || newSelected === selected) {
+ return;
+ }
+ selected = newSelected;
+
+ /**
+ * An event that fires when selected changes on this track. This allows
+ * the VideoTrackList that holds this track to act accordingly.
+ *
+ * > Note: This is not part of the spec! Native tracks will do
+ * this internally without an event.
+ *
+ * @event VideoTrack#selectedchange
+ * @type {Event}
+ */
+ this.trigger('selectedchange');
+ }
+ });
+
+ // if the user sets this track to selected then
+ // set selected to that true value otherwise
+ // we keep it false
+ if (settings.selected) {
+ this.selected = settings.selected;
+ }
+ }
+ }
+
+ /**
+ * @file html-track-element.js
+ */
+
+ /**
+ * A single track represented in the DOM.
+ *
+ * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#htmltrackelement}
+ * @extends EventTarget
+ */
+ class HTMLTrackElement extends EventTarget$2 {
+ /**
+ * Create an instance of this class.
+ *
+ * @param {Object} options={}
+ * Object of option names and values
+ *
+ * @param { import('../tech/tech').default } options.tech
+ * A reference to the tech that owns this HTMLTrackElement.
+ *
+ * @param {TextTrack~Kind} [options.kind='subtitles']
+ * A valid text track kind.
+ *
+ * @param {TextTrack~Mode} [options.mode='disabled']
+ * A valid text track mode.
+ *
+ * @param {string} [options.id='vjs_track_' + Guid.newGUID()]
+ * A unique id for this TextTrack.
+ *
+ * @param {string} [options.label='']
+ * The menu label for this track.
+ *
+ * @param {string} [options.language='']
+ * A valid two character language code.
+ *
+ * @param {string} [options.srclang='']
+ * A valid two character language code. An alternative, but deprioritized
+ * version of `options.language`
+ *
+ * @param {string} [options.src]
+ * A url to TextTrack cues.
+ *
+ * @param {boolean} [options.default]
+ * If this track should default to on or off.
+ */
+ constructor(options = {}) {
+ super();
+ let readyState;
+ const track = new TextTrack(options);
+ this.kind = track.kind;
+ this.src = track.src;
+ this.srclang = track.language;
+ this.label = track.label;
+ this.default = track.default;
+ Object.defineProperties(this, {
+ /**
+ * @memberof HTMLTrackElement
+ * @member {HTMLTrackElement~ReadyState} readyState
+ * The current ready state of the track element.
+ * @instance
+ */
+ readyState: {
+ get() {
+ return readyState;
+ }
+ },
+ /**
+ * @memberof HTMLTrackElement
+ * @member {TextTrack} track
+ * The underlying TextTrack object.
+ * @instance
+ *
+ */
+ track: {
+ get() {
+ return track;
+ }
+ }
+ });
+ readyState = HTMLTrackElement.NONE;
+
+ /**
+ * @listens TextTrack#loadeddata
+ * @fires HTMLTrackElement#load
+ */
+ track.addEventListener('loadeddata', () => {
+ readyState = HTMLTrackElement.LOADED;
+ this.trigger({
+ type: 'load',
+ target: this
+ });
+ });
+ }
+ }
+
+ /**
+ * @protected
+ */
+ HTMLTrackElement.prototype.allowedEvents_ = {
+ load: 'load'
+ };
+
+ /**
+ * The text track not loaded state.
+ *
+ * @type {number}
+ * @static
+ */
+ HTMLTrackElement.NONE = 0;
+
+ /**
+ * The text track loading state.
+ *
+ * @type {number}
+ * @static
+ */
+ HTMLTrackElement.LOADING = 1;
+
+ /**
+ * The text track loaded state.
+ *
+ * @type {number}
+ * @static
+ */
+ HTMLTrackElement.LOADED = 2;
+
+ /**
+ * The text track failed to load state.
+ *
+ * @type {number}
+ * @static
+ */
+ HTMLTrackElement.ERROR = 3;
+
+ /*
+ * This file contains all track properties that are used in
+ * player.js, tech.js, html5.js and possibly other techs in the future.
+ */
+
+ const NORMAL = {
+ audio: {
+ ListClass: AudioTrackList,
+ TrackClass: AudioTrack,
+ capitalName: 'Audio'
+ },
+ video: {
+ ListClass: VideoTrackList,
+ TrackClass: VideoTrack,
+ capitalName: 'Video'
+ },
+ text: {
+ ListClass: TextTrackList,
+ TrackClass: TextTrack,
+ capitalName: 'Text'
+ }
+ };
+ Object.keys(NORMAL).forEach(function (type) {
+ NORMAL[type].getterName = `${type}Tracks`;
+ NORMAL[type].privateName = `${type}Tracks_`;
+ });
+ const REMOTE = {
+ remoteText: {
+ ListClass: TextTrackList,
+ TrackClass: TextTrack,
+ capitalName: 'RemoteText',
+ getterName: 'remoteTextTracks',
+ privateName: 'remoteTextTracks_'
+ },
+ remoteTextEl: {
+ ListClass: HtmlTrackElementList,
+ TrackClass: HTMLTrackElement,
+ capitalName: 'RemoteTextTrackEls',
+ getterName: 'remoteTextTrackEls',
+ privateName: 'remoteTextTrackEls_'
+ }
+ };
+ const ALL = Object.assign({}, NORMAL, REMOTE);
+ REMOTE.names = Object.keys(REMOTE);
+ NORMAL.names = Object.keys(NORMAL);
+ ALL.names = [].concat(REMOTE.names).concat(NORMAL.names);
+
+ var minDoc = {};
+
+ var topLevel = typeof commonjsGlobal !== 'undefined' ? commonjsGlobal : typeof window !== 'undefined' ? window : {};
+ var doccy;
+ if (typeof document !== 'undefined') {
+ doccy = document;
+ } else {
+ doccy = topLevel['__GLOBAL_DOCUMENT_CACHE@4'];
+ if (!doccy) {
+ doccy = topLevel['__GLOBAL_DOCUMENT_CACHE@4'] = minDoc;
+ }
+ }
+ var document_1 = doccy;
+
+ /**
+ * Copyright 2013 vtt.js Contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+ /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+ /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+
+ var _objCreate = Object.create || function () {
+ function F() {}
+ return function (o) {
+ if (arguments.length !== 1) {
+ throw new Error('Object.create shim only accepts one parameter.');
+ }
+ F.prototype = o;
+ return new F();
+ };
+ }();
+
+ // Creates a new ParserError object from an errorData object. The errorData
+ // object should have default code and message properties. The default message
+ // property can be overriden by passing in a message parameter.
+ // See ParsingError.Errors below for acceptable errors.
+ function ParsingError(errorData, message) {
+ this.name = "ParsingError";
+ this.code = errorData.code;
+ this.message = message || errorData.message;
+ }
+ ParsingError.prototype = _objCreate(Error.prototype);
+ ParsingError.prototype.constructor = ParsingError;
+
+ // ParsingError metadata for acceptable ParsingErrors.
+ ParsingError.Errors = {
+ BadSignature: {
+ code: 0,
+ message: "Malformed WebVTT signature."
+ },
+ BadTimeStamp: {
+ code: 1,
+ message: "Malformed time stamp."
+ }
+ };
+
+ // Try to parse input as a time stamp.
+ function parseTimeStamp(input) {
+ function computeSeconds(h, m, s, f) {
+ return (h | 0) * 3600 + (m | 0) * 60 + (s | 0) + (f | 0) / 1000;
+ }
+ var m = input.match(/^(\d+):(\d{1,2})(:\d{1,2})?\.(\d{3})/);
+ if (!m) {
+ return null;
+ }
+ if (m[3]) {
+ // Timestamp takes the form of [hours]:[minutes]:[seconds].[milliseconds]
+ return computeSeconds(m[1], m[2], m[3].replace(":", ""), m[4]);
+ } else if (m[1] > 59) {
+ // Timestamp takes the form of [hours]:[minutes].[milliseconds]
+ // First position is hours as it's over 59.
+ return computeSeconds(m[1], m[2], 0, m[4]);
+ } else {
+ // Timestamp takes the form of [minutes]:[seconds].[milliseconds]
+ return computeSeconds(0, m[1], m[2], m[4]);
+ }
+ }
+
+ // A settings object holds key/value pairs and will ignore anything but the first
+ // assignment to a specific key.
+ function Settings() {
+ this.values = _objCreate(null);
+ }
+ Settings.prototype = {
+ // Only accept the first assignment to any key.
+ set: function (k, v) {
+ if (!this.get(k) && v !== "") {
+ this.values[k] = v;
+ }
+ },
+ // Return the value for a key, or a default value.
+ // If 'defaultKey' is passed then 'dflt' is assumed to be an object with
+ // a number of possible default values as properties where 'defaultKey' is
+ // the key of the property that will be chosen; otherwise it's assumed to be
+ // a single value.
+ get: function (k, dflt, defaultKey) {
+ if (defaultKey) {
+ return this.has(k) ? this.values[k] : dflt[defaultKey];
+ }
+ return this.has(k) ? this.values[k] : dflt;
+ },
+ // Check whether we have a value for a key.
+ has: function (k) {
+ return k in this.values;
+ },
+ // Accept a setting if its one of the given alternatives.
+ alt: function (k, v, a) {
+ for (var n = 0; n < a.length; ++n) {
+ if (v === a[n]) {
+ this.set(k, v);
+ break;
+ }
+ }
+ },
+ // Accept a setting if its a valid (signed) integer.
+ integer: function (k, v) {
+ if (/^-?\d+$/.test(v)) {
+ // integer
+ this.set(k, parseInt(v, 10));
+ }
+ },
+ // Accept a setting if its a valid percentage.
+ percent: function (k, v) {
+ if (v.match(/^([\d]{1,3})(\.[\d]*)?%$/)) {
+ v = parseFloat(v);
+ if (v >= 0 && v <= 100) {
+ this.set(k, v);
+ return true;
+ }
+ }
+ return false;
+ }
+ };
+
+ // Helper function to parse input into groups separated by 'groupDelim', and
+ // interprete each group as a key/value pair separated by 'keyValueDelim'.
+ function parseOptions(input, callback, keyValueDelim, groupDelim) {
+ var groups = groupDelim ? input.split(groupDelim) : [input];
+ for (var i in groups) {
+ if (typeof groups[i] !== "string") {
+ continue;
+ }
+ var kv = groups[i].split(keyValueDelim);
+ if (kv.length !== 2) {
+ continue;
+ }
+ var k = kv[0].trim();
+ var v = kv[1].trim();
+ callback(k, v);
+ }
+ }
+ function parseCue(input, cue, regionList) {
+ // Remember the original input if we need to throw an error.
+ var oInput = input;
+ // 4.1 WebVTT timestamp
+ function consumeTimeStamp() {
+ var ts = parseTimeStamp(input);
+ if (ts === null) {
+ throw new ParsingError(ParsingError.Errors.BadTimeStamp, "Malformed timestamp: " + oInput);
+ }
+ // Remove time stamp from input.
+ input = input.replace(/^[^\sa-zA-Z-]+/, "");
+ return ts;
+ }
+
+ // 4.4.2 WebVTT cue settings
+ function consumeCueSettings(input, cue) {
+ var settings = new Settings();
+ parseOptions(input, function (k, v) {
+ switch (k) {
+ case "region":
+ // Find the last region we parsed with the same region id.
+ for (var i = regionList.length - 1; i >= 0; i--) {
+ if (regionList[i].id === v) {
+ settings.set(k, regionList[i].region);
+ break;
+ }
+ }
+ break;
+ case "vertical":
+ settings.alt(k, v, ["rl", "lr"]);
+ break;
+ case "line":
+ var vals = v.split(","),
+ vals0 = vals[0];
+ settings.integer(k, vals0);
+ settings.percent(k, vals0) ? settings.set("snapToLines", false) : null;
+ settings.alt(k, vals0, ["auto"]);
+ if (vals.length === 2) {
+ settings.alt("lineAlign", vals[1], ["start", "center", "end"]);
+ }
+ break;
+ case "position":
+ vals = v.split(",");
+ settings.percent(k, vals[0]);
+ if (vals.length === 2) {
+ settings.alt("positionAlign", vals[1], ["start", "center", "end"]);
+ }
+ break;
+ case "size":
+ settings.percent(k, v);
+ break;
+ case "align":
+ settings.alt(k, v, ["start", "center", "end", "left", "right"]);
+ break;
+ }
+ }, /:/, /\s/);
+
+ // Apply default values for any missing fields.
+ cue.region = settings.get("region", null);
+ cue.vertical = settings.get("vertical", "");
+ try {
+ cue.line = settings.get("line", "auto");
+ } catch (e) {}
+ cue.lineAlign = settings.get("lineAlign", "start");
+ cue.snapToLines = settings.get("snapToLines", true);
+ cue.size = settings.get("size", 100);
+ // Safari still uses the old middle value and won't accept center
+ try {
+ cue.align = settings.get("align", "center");
+ } catch (e) {
+ cue.align = settings.get("align", "middle");
+ }
+ try {
+ cue.position = settings.get("position", "auto");
+ } catch (e) {
+ cue.position = settings.get("position", {
+ start: 0,
+ left: 0,
+ center: 50,
+ middle: 50,
+ end: 100,
+ right: 100
+ }, cue.align);
+ }
+ cue.positionAlign = settings.get("positionAlign", {
+ start: "start",
+ left: "start",
+ center: "center",
+ middle: "center",
+ end: "end",
+ right: "end"
+ }, cue.align);
+ }
+ function skipWhitespace() {
+ input = input.replace(/^\s+/, "");
+ }
+
+ // 4.1 WebVTT cue timings.
+ skipWhitespace();
+ cue.startTime = consumeTimeStamp(); // (1) collect cue start time
+ skipWhitespace();
+ if (input.substr(0, 3) !== "-->") {
+ // (3) next characters must match "-->"
+ throw new ParsingError(ParsingError.Errors.BadTimeStamp, "Malformed time stamp (time stamps must be separated by '-->'): " + oInput);
+ }
+ input = input.substr(3);
+ skipWhitespace();
+ cue.endTime = consumeTimeStamp(); // (5) collect cue end time
+
+ // 4.1 WebVTT cue settings list.
+ skipWhitespace();
+ consumeCueSettings(input, cue);
+ }
+
+ // When evaluating this file as part of a Webpack bundle for server
+ // side rendering, `document` is an empty object.
+ var TEXTAREA_ELEMENT = document_1.createElement && document_1.createElement("textarea");
+ var TAG_NAME = {
+ c: "span",
+ i: "i",
+ b: "b",
+ u: "u",
+ ruby: "ruby",
+ rt: "rt",
+ v: "span",
+ lang: "span"
+ };
+
+ // 5.1 default text color
+ // 5.2 default text background color is equivalent to text color with bg_ prefix
+ var DEFAULT_COLOR_CLASS = {
+ white: 'rgba(255,255,255,1)',
+ lime: 'rgba(0,255,0,1)',
+ cyan: 'rgba(0,255,255,1)',
+ red: 'rgba(255,0,0,1)',
+ yellow: 'rgba(255,255,0,1)',
+ magenta: 'rgba(255,0,255,1)',
+ blue: 'rgba(0,0,255,1)',
+ black: 'rgba(0,0,0,1)'
+ };
+ var TAG_ANNOTATION = {
+ v: "title",
+ lang: "lang"
+ };
+ var NEEDS_PARENT = {
+ rt: "ruby"
+ };
+
+ // Parse content into a document fragment.
+ function parseContent(window, input) {
+ function nextToken() {
+ // Check for end-of-string.
+ if (!input) {
+ return null;
+ }
+
+ // Consume 'n' characters from the input.
+ function consume(result) {
+ input = input.substr(result.length);
+ return result;
+ }
+ var m = input.match(/^([^<]*)(<[^>]*>?)?/);
+ // If there is some text before the next tag, return it, otherwise return
+ // the tag.
+ return consume(m[1] ? m[1] : m[2]);
+ }
+ function unescape(s) {
+ TEXTAREA_ELEMENT.innerHTML = s;
+ s = TEXTAREA_ELEMENT.textContent;
+ TEXTAREA_ELEMENT.textContent = "";
+ return s;
+ }
+ function shouldAdd(current, element) {
+ return !NEEDS_PARENT[element.localName] || NEEDS_PARENT[element.localName] === current.localName;
+ }
+
+ // Create an element for this tag.
+ function createElement(type, annotation) {
+ var tagName = TAG_NAME[type];
+ if (!tagName) {
+ return null;
+ }
+ var element = window.document.createElement(tagName);
+ var name = TAG_ANNOTATION[type];
+ if (name && annotation) {
+ element[name] = annotation.trim();
+ }
+ return element;
+ }
+ var rootDiv = window.document.createElement("div"),
+ current = rootDiv,
+ t,
+ tagStack = [];
+ while ((t = nextToken()) !== null) {
+ if (t[0] === '<') {
+ if (t[1] === "/") {
+ // If the closing tag matches, move back up to the parent node.
+ if (tagStack.length && tagStack[tagStack.length - 1] === t.substr(2).replace(">", "")) {
+ tagStack.pop();
+ current = current.parentNode;
+ }
+ // Otherwise just ignore the end tag.
+ continue;
+ }
+ var ts = parseTimeStamp(t.substr(1, t.length - 2));
+ var node;
+ if (ts) {
+ // Timestamps are lead nodes as well.
+ node = window.document.createProcessingInstruction("timestamp", ts);
+ current.appendChild(node);
+ continue;
+ }
+ var m = t.match(/^<([^.\s/0-9>]+)(\.[^\s\\>]+)?([^>\\]+)?(\\?)>?$/);
+ // If we can't parse the tag, skip to the next tag.
+ if (!m) {
+ continue;
+ }
+ // Try to construct an element, and ignore the tag if we couldn't.
+ node = createElement(m[1], m[3]);
+ if (!node) {
+ continue;
+ }
+ // Determine if the tag should be added based on the context of where it
+ // is placed in the cuetext.
+ if (!shouldAdd(current, node)) {
+ continue;
+ }
+ // Set the class list (as a list of classes, separated by space).
+ if (m[2]) {
+ var classes = m[2].split('.');
+ classes.forEach(function (cl) {
+ var bgColor = /^bg_/.test(cl);
+ // slice out `bg_` if it's a background color
+ var colorName = bgColor ? cl.slice(3) : cl;
+ if (DEFAULT_COLOR_CLASS.hasOwnProperty(colorName)) {
+ var propName = bgColor ? 'background-color' : 'color';
+ var propValue = DEFAULT_COLOR_CLASS[colorName];
+ node.style[propName] = propValue;
+ }
+ });
+ node.className = classes.join(' ');
+ }
+ // Append the node to the current node, and enter the scope of the new
+ // node.
+ tagStack.push(m[1]);
+ current.appendChild(node);
+ current = node;
+ continue;
+ }
+
+ // Text nodes are leaf nodes.
+ current.appendChild(window.document.createTextNode(unescape(t)));
+ }
+ return rootDiv;
+ }
+
+ // This is a list of all the Unicode characters that have a strong
+ // right-to-left category. What this means is that these characters are
+ // written right-to-left for sure. It was generated by pulling all the strong
+ // right-to-left characters out of the Unicode data table. That table can
+ // found at: http://www.unicode.org/Public/UNIDATA/UnicodeData.txt
+ var strongRTLRanges = [[0x5be, 0x5be], [0x5c0, 0x5c0], [0x5c3, 0x5c3], [0x5c6, 0x5c6], [0x5d0, 0x5ea], [0x5f0, 0x5f4], [0x608, 0x608], [0x60b, 0x60b], [0x60d, 0x60d], [0x61b, 0x61b], [0x61e, 0x64a], [0x66d, 0x66f], [0x671, 0x6d5], [0x6e5, 0x6e6], [0x6ee, 0x6ef], [0x6fa, 0x70d], [0x70f, 0x710], [0x712, 0x72f], [0x74d, 0x7a5], [0x7b1, 0x7b1], [0x7c0, 0x7ea], [0x7f4, 0x7f5], [0x7fa, 0x7fa], [0x800, 0x815], [0x81a, 0x81a], [0x824, 0x824], [0x828, 0x828], [0x830, 0x83e], [0x840, 0x858], [0x85e, 0x85e], [0x8a0, 0x8a0], [0x8a2, 0x8ac], [0x200f, 0x200f], [0xfb1d, 0xfb1d], [0xfb1f, 0xfb28], [0xfb2a, 0xfb36], [0xfb38, 0xfb3c], [0xfb3e, 0xfb3e], [0xfb40, 0xfb41], [0xfb43, 0xfb44], [0xfb46, 0xfbc1], [0xfbd3, 0xfd3d], [0xfd50, 0xfd8f], [0xfd92, 0xfdc7], [0xfdf0, 0xfdfc], [0xfe70, 0xfe74], [0xfe76, 0xfefc], [0x10800, 0x10805], [0x10808, 0x10808], [0x1080a, 0x10835], [0x10837, 0x10838], [0x1083c, 0x1083c], [0x1083f, 0x10855], [0x10857, 0x1085f], [0x10900, 0x1091b], [0x10920, 0x10939], [0x1093f, 0x1093f], [0x10980, 0x109b7], [0x109be, 0x109bf], [0x10a00, 0x10a00], [0x10a10, 0x10a13], [0x10a15, 0x10a17], [0x10a19, 0x10a33], [0x10a40, 0x10a47], [0x10a50, 0x10a58], [0x10a60, 0x10a7f], [0x10b00, 0x10b35], [0x10b40, 0x10b55], [0x10b58, 0x10b72], [0x10b78, 0x10b7f], [0x10c00, 0x10c48], [0x1ee00, 0x1ee03], [0x1ee05, 0x1ee1f], [0x1ee21, 0x1ee22], [0x1ee24, 0x1ee24], [0x1ee27, 0x1ee27], [0x1ee29, 0x1ee32], [0x1ee34, 0x1ee37], [0x1ee39, 0x1ee39], [0x1ee3b, 0x1ee3b], [0x1ee42, 0x1ee42], [0x1ee47, 0x1ee47], [0x1ee49, 0x1ee49], [0x1ee4b, 0x1ee4b], [0x1ee4d, 0x1ee4f], [0x1ee51, 0x1ee52], [0x1ee54, 0x1ee54], [0x1ee57, 0x1ee57], [0x1ee59, 0x1ee59], [0x1ee5b, 0x1ee5b], [0x1ee5d, 0x1ee5d], [0x1ee5f, 0x1ee5f], [0x1ee61, 0x1ee62], [0x1ee64, 0x1ee64], [0x1ee67, 0x1ee6a], [0x1ee6c, 0x1ee72], [0x1ee74, 0x1ee77], [0x1ee79, 0x1ee7c], [0x1ee7e, 0x1ee7e], [0x1ee80, 0x1ee89], [0x1ee8b, 0x1ee9b], [0x1eea1, 0x1eea3], [0x1eea5, 0x1eea9], [0x1eeab, 0x1eebb], [0x10fffd, 0x10fffd]];
+ function isStrongRTLChar(charCode) {
+ for (var i = 0; i < strongRTLRanges.length; i++) {
+ var currentRange = strongRTLRanges[i];
+ if (charCode >= currentRange[0] && charCode <= currentRange[1]) {
+ return true;
+ }
+ }
+ return false;
+ }
+ function determineBidi(cueDiv) {
+ var nodeStack = [],
+ text = "",
+ charCode;
+ if (!cueDiv || !cueDiv.childNodes) {
+ return "ltr";
+ }
+ function pushNodes(nodeStack, node) {
+ for (var i = node.childNodes.length - 1; i >= 0; i--) {
+ nodeStack.push(node.childNodes[i]);
+ }
+ }
+ function nextTextNode(nodeStack) {
+ if (!nodeStack || !nodeStack.length) {
+ return null;
+ }
+ var node = nodeStack.pop(),
+ text = node.textContent || node.innerText;
+ if (text) {
+ // TODO: This should match all unicode type B characters (paragraph
+ // separator characters). See issue #115.
+ var m = text.match(/^.*(\n|\r)/);
+ if (m) {
+ nodeStack.length = 0;
+ return m[0];
+ }
+ return text;
+ }
+ if (node.tagName === "ruby") {
+ return nextTextNode(nodeStack);
+ }
+ if (node.childNodes) {
+ pushNodes(nodeStack, node);
+ return nextTextNode(nodeStack);
+ }
+ }
+ pushNodes(nodeStack, cueDiv);
+ while (text = nextTextNode(nodeStack)) {
+ for (var i = 0; i < text.length; i++) {
+ charCode = text.charCodeAt(i);
+ if (isStrongRTLChar(charCode)) {
+ return "rtl";
+ }
+ }
+ }
+ return "ltr";
+ }
+ function computeLinePos(cue) {
+ if (typeof cue.line === "number" && (cue.snapToLines || cue.line >= 0 && cue.line <= 100)) {
+ return cue.line;
+ }
+ if (!cue.track || !cue.track.textTrackList || !cue.track.textTrackList.mediaElement) {
+ return -1;
+ }
+ var track = cue.track,
+ trackList = track.textTrackList,
+ count = 0;
+ for (var i = 0; i < trackList.length && trackList[i] !== track; i++) {
+ if (trackList[i].mode === "showing") {
+ count++;
+ }
+ }
+ return ++count * -1;
+ }
+ function StyleBox() {}
+
+ // Apply styles to a div. If there is no div passed then it defaults to the
+ // div on 'this'.
+ StyleBox.prototype.applyStyles = function (styles, div) {
+ div = div || this.div;
+ for (var prop in styles) {
+ if (styles.hasOwnProperty(prop)) {
+ div.style[prop] = styles[prop];
+ }
+ }
+ };
+ StyleBox.prototype.formatStyle = function (val, unit) {
+ return val === 0 ? 0 : val + unit;
+ };
+
+ // Constructs the computed display state of the cue (a div). Places the div
+ // into the overlay which should be a block level element (usually a div).
+ function CueStyleBox(window, cue, styleOptions) {
+ StyleBox.call(this);
+ this.cue = cue;
+
+ // Parse our cue's text into a DOM tree rooted at 'cueDiv'. This div will
+ // have inline positioning and will function as the cue background box.
+ this.cueDiv = parseContent(window, cue.text);
+ var styles = {
+ color: "rgba(255, 255, 255, 1)",
+ backgroundColor: "rgba(0, 0, 0, 0.8)",
+ position: "relative",
+ left: 0,
+ right: 0,
+ top: 0,
+ bottom: 0,
+ display: "inline",
+ writingMode: cue.vertical === "" ? "horizontal-tb" : cue.vertical === "lr" ? "vertical-lr" : "vertical-rl",
+ unicodeBidi: "plaintext"
+ };
+ this.applyStyles(styles, this.cueDiv);
+
+ // Create an absolutely positioned div that will be used to position the cue
+ // div. Note, all WebVTT cue-setting alignments are equivalent to the CSS
+ // mirrors of them except middle instead of center on Safari.
+ this.div = window.document.createElement("div");
+ styles = {
+ direction: determineBidi(this.cueDiv),
+ writingMode: cue.vertical === "" ? "horizontal-tb" : cue.vertical === "lr" ? "vertical-lr" : "vertical-rl",
+ unicodeBidi: "plaintext",
+ textAlign: cue.align === "middle" ? "center" : cue.align,
+ font: styleOptions.font,
+ whiteSpace: "pre-line",
+ position: "absolute"
+ };
+ this.applyStyles(styles);
+ this.div.appendChild(this.cueDiv);
+
+ // Calculate the distance from the reference edge of the viewport to the text
+ // position of the cue box. The reference edge will be resolved later when
+ // the box orientation styles are applied.
+ var textPos = 0;
+ switch (cue.positionAlign) {
+ case "start":
+ case "line-left":
+ textPos = cue.position;
+ break;
+ case "center":
+ textPos = cue.position - cue.size / 2;
+ break;
+ case "end":
+ case "line-right":
+ textPos = cue.position - cue.size;
+ break;
+ }
+
+ // Horizontal box orientation; textPos is the distance from the left edge of the
+ // area to the left edge of the box and cue.size is the distance extending to
+ // the right from there.
+ if (cue.vertical === "") {
+ this.applyStyles({
+ left: this.formatStyle(textPos, "%"),
+ width: this.formatStyle(cue.size, "%")
+ });
+ // Vertical box orientation; textPos is the distance from the top edge of the
+ // area to the top edge of the box and cue.size is the height extending
+ // downwards from there.
+ } else {
+ this.applyStyles({
+ top: this.formatStyle(textPos, "%"),
+ height: this.formatStyle(cue.size, "%")
+ });
+ }
+ this.move = function (box) {
+ this.applyStyles({
+ top: this.formatStyle(box.top, "px"),
+ bottom: this.formatStyle(box.bottom, "px"),
+ left: this.formatStyle(box.left, "px"),
+ right: this.formatStyle(box.right, "px"),
+ height: this.formatStyle(box.height, "px"),
+ width: this.formatStyle(box.width, "px")
+ });
+ };
+ }
+ CueStyleBox.prototype = _objCreate(StyleBox.prototype);
+ CueStyleBox.prototype.constructor = CueStyleBox;
+
+ // Represents the co-ordinates of an Element in a way that we can easily
+ // compute things with such as if it overlaps or intersects with another Element.
+ // Can initialize it with either a StyleBox or another BoxPosition.
+ function BoxPosition(obj) {
+ // Either a BoxPosition was passed in and we need to copy it, or a StyleBox
+ // was passed in and we need to copy the results of 'getBoundingClientRect'
+ // as the object returned is readonly. All co-ordinate values are in reference
+ // to the viewport origin (top left).
+ var lh, height, width, top;
+ if (obj.div) {
+ height = obj.div.offsetHeight;
+ width = obj.div.offsetWidth;
+ top = obj.div.offsetTop;
+ var rects = (rects = obj.div.childNodes) && (rects = rects[0]) && rects.getClientRects && rects.getClientRects();
+ obj = obj.div.getBoundingClientRect();
+ // In certain cases the outter div will be slightly larger then the sum of
+ // the inner div's lines. This could be due to bold text, etc, on some platforms.
+ // In this case we should get the average line height and use that. This will
+ // result in the desired behaviour.
+ lh = rects ? Math.max(rects[0] && rects[0].height || 0, obj.height / rects.length) : 0;
+ }
+ this.left = obj.left;
+ this.right = obj.right;
+ this.top = obj.top || top;
+ this.height = obj.height || height;
+ this.bottom = obj.bottom || top + (obj.height || height);
+ this.width = obj.width || width;
+ this.lineHeight = lh !== undefined ? lh : obj.lineHeight;
+ }
+
+ // Move the box along a particular axis. Optionally pass in an amount to move
+ // the box. If no amount is passed then the default is the line height of the
+ // box.
+ BoxPosition.prototype.move = function (axis, toMove) {
+ toMove = toMove !== undefined ? toMove : this.lineHeight;
+ switch (axis) {
+ case "+x":
+ this.left += toMove;
+ this.right += toMove;
+ break;
+ case "-x":
+ this.left -= toMove;
+ this.right -= toMove;
+ break;
+ case "+y":
+ this.top += toMove;
+ this.bottom += toMove;
+ break;
+ case "-y":
+ this.top -= toMove;
+ this.bottom -= toMove;
+ break;
+ }
+ };
+
+ // Check if this box overlaps another box, b2.
+ BoxPosition.prototype.overlaps = function (b2) {
+ return this.left < b2.right && this.right > b2.left && this.top < b2.bottom && this.bottom > b2.top;
+ };
+
+ // Check if this box overlaps any other boxes in boxes.
+ BoxPosition.prototype.overlapsAny = function (boxes) {
+ for (var i = 0; i < boxes.length; i++) {
+ if (this.overlaps(boxes[i])) {
+ return true;
+ }
+ }
+ return false;
+ };
+
+ // Check if this box is within another box.
+ BoxPosition.prototype.within = function (container) {
+ return this.top >= container.top && this.bottom <= container.bottom && this.left >= container.left && this.right <= container.right;
+ };
+
+ // Check if this box is entirely within the container or it is overlapping
+ // on the edge opposite of the axis direction passed. For example, if "+x" is
+ // passed and the box is overlapping on the left edge of the container, then
+ // return true.
+ BoxPosition.prototype.overlapsOppositeAxis = function (container, axis) {
+ switch (axis) {
+ case "+x":
+ return this.left < container.left;
+ case "-x":
+ return this.right > container.right;
+ case "+y":
+ return this.top < container.top;
+ case "-y":
+ return this.bottom > container.bottom;
+ }
+ };
+
+ // Find the percentage of the area that this box is overlapping with another
+ // box.
+ BoxPosition.prototype.intersectPercentage = function (b2) {
+ var x = Math.max(0, Math.min(this.right, b2.right) - Math.max(this.left, b2.left)),
+ y = Math.max(0, Math.min(this.bottom, b2.bottom) - Math.max(this.top, b2.top)),
+ intersectArea = x * y;
+ return intersectArea / (this.height * this.width);
+ };
+
+ // Convert the positions from this box to CSS compatible positions using
+ // the reference container's positions. This has to be done because this
+ // box's positions are in reference to the viewport origin, whereas, CSS
+ // values are in referecne to their respective edges.
+ BoxPosition.prototype.toCSSCompatValues = function (reference) {
+ return {
+ top: this.top - reference.top,
+ bottom: reference.bottom - this.bottom,
+ left: this.left - reference.left,
+ right: reference.right - this.right,
+ height: this.height,
+ width: this.width
+ };
+ };
+
+ // Get an object that represents the box's position without anything extra.
+ // Can pass a StyleBox, HTMLElement, or another BoxPositon.
+ BoxPosition.getSimpleBoxPosition = function (obj) {
+ var height = obj.div ? obj.div.offsetHeight : obj.tagName ? obj.offsetHeight : 0;
+ var width = obj.div ? obj.div.offsetWidth : obj.tagName ? obj.offsetWidth : 0;
+ var top = obj.div ? obj.div.offsetTop : obj.tagName ? obj.offsetTop : 0;
+ obj = obj.div ? obj.div.getBoundingClientRect() : obj.tagName ? obj.getBoundingClientRect() : obj;
+ var ret = {
+ left: obj.left,
+ right: obj.right,
+ top: obj.top || top,
+ height: obj.height || height,
+ bottom: obj.bottom || top + (obj.height || height),
+ width: obj.width || width
+ };
+ return ret;
+ };
+
+ // Move a StyleBox to its specified, or next best, position. The containerBox
+ // is the box that contains the StyleBox, such as a div. boxPositions are
+ // a list of other boxes that the styleBox can't overlap with.
+ function moveBoxToLinePosition(window, styleBox, containerBox, boxPositions) {
+ // Find the best position for a cue box, b, on the video. The axis parameter
+ // is a list of axis, the order of which, it will move the box along. For example:
+ // Passing ["+x", "-x"] will move the box first along the x axis in the positive
+ // direction. If it doesn't find a good position for it there it will then move
+ // it along the x axis in the negative direction.
+ function findBestPosition(b, axis) {
+ var bestPosition,
+ specifiedPosition = new BoxPosition(b),
+ percentage = 1; // Highest possible so the first thing we get is better.
+
+ for (var i = 0; i < axis.length; i++) {
+ while (b.overlapsOppositeAxis(containerBox, axis[i]) || b.within(containerBox) && b.overlapsAny(boxPositions)) {
+ b.move(axis[i]);
+ }
+ // We found a spot where we aren't overlapping anything. This is our
+ // best position.
+ if (b.within(containerBox)) {
+ return b;
+ }
+ var p = b.intersectPercentage(containerBox);
+ // If we're outside the container box less then we were on our last try
+ // then remember this position as the best position.
+ if (percentage > p) {
+ bestPosition = new BoxPosition(b);
+ percentage = p;
+ }
+ // Reset the box position to the specified position.
+ b = new BoxPosition(specifiedPosition);
+ }
+ return bestPosition || specifiedPosition;
+ }
+ var boxPosition = new BoxPosition(styleBox),
+ cue = styleBox.cue,
+ linePos = computeLinePos(cue),
+ axis = [];
+
+ // If we have a line number to align the cue to.
+ if (cue.snapToLines) {
+ var size;
+ switch (cue.vertical) {
+ case "":
+ axis = ["+y", "-y"];
+ size = "height";
+ break;
+ case "rl":
+ axis = ["+x", "-x"];
+ size = "width";
+ break;
+ case "lr":
+ axis = ["-x", "+x"];
+ size = "width";
+ break;
+ }
+ var step = boxPosition.lineHeight,
+ position = step * Math.round(linePos),
+ maxPosition = containerBox[size] + step,
+ initialAxis = axis[0];
+
+ // If the specified intial position is greater then the max position then
+ // clamp the box to the amount of steps it would take for the box to
+ // reach the max position.
+ if (Math.abs(position) > maxPosition) {
+ position = position < 0 ? -1 : 1;
+ position *= Math.ceil(maxPosition / step) * step;
+ }
+
+ // If computed line position returns negative then line numbers are
+ // relative to the bottom of the video instead of the top. Therefore, we
+ // need to increase our initial position by the length or width of the
+ // video, depending on the writing direction, and reverse our axis directions.
+ if (linePos < 0) {
+ position += cue.vertical === "" ? containerBox.height : containerBox.width;
+ axis = axis.reverse();
+ }
+
+ // Move the box to the specified position. This may not be its best
+ // position.
+ boxPosition.move(initialAxis, position);
+ } else {
+ // If we have a percentage line value for the cue.
+ var calculatedPercentage = boxPosition.lineHeight / containerBox.height * 100;
+ switch (cue.lineAlign) {
+ case "center":
+ linePos -= calculatedPercentage / 2;
+ break;
+ case "end":
+ linePos -= calculatedPercentage;
+ break;
+ }
+
+ // Apply initial line position to the cue box.
+ switch (cue.vertical) {
+ case "":
+ styleBox.applyStyles({
+ top: styleBox.formatStyle(linePos, "%")
+ });
+ break;
+ case "rl":
+ styleBox.applyStyles({
+ left: styleBox.formatStyle(linePos, "%")
+ });
+ break;
+ case "lr":
+ styleBox.applyStyles({
+ right: styleBox.formatStyle(linePos, "%")
+ });
+ break;
+ }
+ axis = ["+y", "-x", "+x", "-y"];
+
+ // Get the box position again after we've applied the specified positioning
+ // to it.
+ boxPosition = new BoxPosition(styleBox);
+ }
+ var bestPosition = findBestPosition(boxPosition, axis);
+ styleBox.move(bestPosition.toCSSCompatValues(containerBox));
+ }
+ function WebVTT$1() {
+ // Nothing
+ }
+
+ // Helper to allow strings to be decoded instead of the default binary utf8 data.
+ WebVTT$1.StringDecoder = function () {
+ return {
+ decode: function (data) {
+ if (!data) {
+ return "";
+ }
+ if (typeof data !== "string") {
+ throw new Error("Error - expected string data.");
+ }
+ return decodeURIComponent(encodeURIComponent(data));
+ }
+ };
+ };
+ WebVTT$1.convertCueToDOMTree = function (window, cuetext) {
+ if (!window || !cuetext) {
+ return null;
+ }
+ return parseContent(window, cuetext);
+ };
+ var FONT_SIZE_PERCENT = 0.05;
+ var FONT_STYLE = "sans-serif";
+ var CUE_BACKGROUND_PADDING = "1.5%";
+
+ // Runs the processing model over the cues and regions passed to it.
+ // @param overlay A block level element (usually a div) that the computed cues
+ // and regions will be placed into.
+ WebVTT$1.processCues = function (window, cues, overlay) {
+ if (!window || !cues || !overlay) {
+ return null;
+ }
+
+ // Remove all previous children.
+ while (overlay.firstChild) {
+ overlay.removeChild(overlay.firstChild);
+ }
+ var paddedOverlay = window.document.createElement("div");
+ paddedOverlay.style.position = "absolute";
+ paddedOverlay.style.left = "0";
+ paddedOverlay.style.right = "0";
+ paddedOverlay.style.top = "0";
+ paddedOverlay.style.bottom = "0";
+ paddedOverlay.style.margin = CUE_BACKGROUND_PADDING;
+ overlay.appendChild(paddedOverlay);
+
+ // Determine if we need to compute the display states of the cues. This could
+ // be the case if a cue's state has been changed since the last computation or
+ // if it has not been computed yet.
+ function shouldCompute(cues) {
+ for (var i = 0; i < cues.length; i++) {
+ if (cues[i].hasBeenReset || !cues[i].displayState) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ // We don't need to recompute the cues' display states. Just reuse them.
+ if (!shouldCompute(cues)) {
+ for (var i = 0; i < cues.length; i++) {
+ paddedOverlay.appendChild(cues[i].displayState);
+ }
+ return;
+ }
+ var boxPositions = [],
+ containerBox = BoxPosition.getSimpleBoxPosition(paddedOverlay),
+ fontSize = Math.round(containerBox.height * FONT_SIZE_PERCENT * 100) / 100;
+ var styleOptions = {
+ font: fontSize + "px " + FONT_STYLE
+ };
+ (function () {
+ var styleBox, cue;
+ for (var i = 0; i < cues.length; i++) {
+ cue = cues[i];
+
+ // Compute the intial position and styles of the cue div.
+ styleBox = new CueStyleBox(window, cue, styleOptions);
+ paddedOverlay.appendChild(styleBox.div);
+
+ // Move the cue div to it's correct line position.
+ moveBoxToLinePosition(window, styleBox, containerBox, boxPositions);
+
+ // Remember the computed div so that we don't have to recompute it later
+ // if we don't have too.
+ cue.displayState = styleBox.div;
+ boxPositions.push(BoxPosition.getSimpleBoxPosition(styleBox));
+ }
+ })();
+ };
+ WebVTT$1.Parser = function (window, vttjs, decoder) {
+ if (!decoder) {
+ decoder = vttjs;
+ vttjs = {};
+ }
+ if (!vttjs) {
+ vttjs = {};
+ }
+ this.window = window;
+ this.vttjs = vttjs;
+ this.state = "INITIAL";
+ this.buffer = "";
+ this.decoder = decoder || new TextDecoder("utf8");
+ this.regionList = [];
+ };
+ WebVTT$1.Parser.prototype = {
+ // If the error is a ParsingError then report it to the consumer if
+ // possible. If it's not a ParsingError then throw it like normal.
+ reportOrThrowError: function (e) {
+ if (e instanceof ParsingError) {
+ this.onparsingerror && this.onparsingerror(e);
+ } else {
+ throw e;
+ }
+ },
+ parse: function (data) {
+ var self = this;
+
+ // If there is no data then we won't decode it, but will just try to parse
+ // whatever is in buffer already. This may occur in circumstances, for
+ // example when flush() is called.
+ if (data) {
+ // Try to decode the data that we received.
+ self.buffer += self.decoder.decode(data, {
+ stream: true
+ });
+ }
+ function collectNextLine() {
+ var buffer = self.buffer;
+ var pos = 0;
+ while (pos < buffer.length && buffer[pos] !== '\r' && buffer[pos] !== '\n') {
+ ++pos;
+ }
+ var line = buffer.substr(0, pos);
+ // Advance the buffer early in case we fail below.
+ if (buffer[pos] === '\r') {
+ ++pos;
+ }
+ if (buffer[pos] === '\n') {
+ ++pos;
+ }
+ self.buffer = buffer.substr(pos);
+ return line;
+ }
+
+ // 3.4 WebVTT region and WebVTT region settings syntax
+ function parseRegion(input) {
+ var settings = new Settings();
+ parseOptions(input, function (k, v) {
+ switch (k) {
+ case "id":
+ settings.set(k, v);
+ break;
+ case "width":
+ settings.percent(k, v);
+ break;
+ case "lines":
+ settings.integer(k, v);
+ break;
+ case "regionanchor":
+ case "viewportanchor":
+ var xy = v.split(',');
+ if (xy.length !== 2) {
+ break;
+ }
+ // We have to make sure both x and y parse, so use a temporary
+ // settings object here.
+ var anchor = new Settings();
+ anchor.percent("x", xy[0]);
+ anchor.percent("y", xy[1]);
+ if (!anchor.has("x") || !anchor.has("y")) {
+ break;
+ }
+ settings.set(k + "X", anchor.get("x"));
+ settings.set(k + "Y", anchor.get("y"));
+ break;
+ case "scroll":
+ settings.alt(k, v, ["up"]);
+ break;
+ }
+ }, /=/, /\s/);
+
+ // Create the region, using default values for any values that were not
+ // specified.
+ if (settings.has("id")) {
+ var region = new (self.vttjs.VTTRegion || self.window.VTTRegion)();
+ region.width = settings.get("width", 100);
+ region.lines = settings.get("lines", 3);
+ region.regionAnchorX = settings.get("regionanchorX", 0);
+ region.regionAnchorY = settings.get("regionanchorY", 100);
+ region.viewportAnchorX = settings.get("viewportanchorX", 0);
+ region.viewportAnchorY = settings.get("viewportanchorY", 100);
+ region.scroll = settings.get("scroll", "");
+ // Register the region.
+ self.onregion && self.onregion(region);
+ // Remember the VTTRegion for later in case we parse any VTTCues that
+ // reference it.
+ self.regionList.push({
+ id: settings.get("id"),
+ region: region
+ });
+ }
+ }
+
+ // draft-pantos-http-live-streaming-20
+ // https://tools.ietf.org/html/draft-pantos-http-live-streaming-20#section-3.5
+ // 3.5 WebVTT
+ function parseTimestampMap(input) {
+ var settings = new Settings();
+ parseOptions(input, function (k, v) {
+ switch (k) {
+ case "MPEGT":
+ settings.integer(k + 'S', v);
+ break;
+ case "LOCA":
+ settings.set(k + 'L', parseTimeStamp(v));
+ break;
+ }
+ }, /[^\d]:/, /,/);
+ self.ontimestampmap && self.ontimestampmap({
+ "MPEGTS": settings.get("MPEGTS"),
+ "LOCAL": settings.get("LOCAL")
+ });
+ }
+
+ // 3.2 WebVTT metadata header syntax
+ function parseHeader(input) {
+ if (input.match(/X-TIMESTAMP-MAP/)) {
+ // This line contains HLS X-TIMESTAMP-MAP metadata
+ parseOptions(input, function (k, v) {
+ switch (k) {
+ case "X-TIMESTAMP-MAP":
+ parseTimestampMap(v);
+ break;
+ }
+ }, /=/);
+ } else {
+ parseOptions(input, function (k, v) {
+ switch (k) {
+ case "Region":
+ // 3.3 WebVTT region metadata header syntax
+ parseRegion(v);
+ break;
+ }
+ }, /:/);
+ }
+ }
+
+ // 5.1 WebVTT file parsing.
+ try {
+ var line;
+ if (self.state === "INITIAL") {
+ // We can't start parsing until we have the first line.
+ if (!/\r\n|\n/.test(self.buffer)) {
+ return this;
+ }
+ line = collectNextLine();
+ var m = line.match(/^WEBVTT([ \t].*)?$/);
+ if (!m || !m[0]) {
+ throw new ParsingError(ParsingError.Errors.BadSignature);
+ }
+ self.state = "HEADER";
+ }
+ var alreadyCollectedLine = false;
+ while (self.buffer) {
+ // We can't parse a line until we have the full line.
+ if (!/\r\n|\n/.test(self.buffer)) {
+ return this;
+ }
+ if (!alreadyCollectedLine) {
+ line = collectNextLine();
+ } else {
+ alreadyCollectedLine = false;
+ }
+ switch (self.state) {
+ case "HEADER":
+ // 13-18 - Allow a header (metadata) under the WEBVTT line.
+ if (/:/.test(line)) {
+ parseHeader(line);
+ } else if (!line) {
+ // An empty line terminates the header and starts the body (cues).
+ self.state = "ID";
+ }
+ continue;
+ case "NOTE":
+ // Ignore NOTE blocks.
+ if (!line) {
+ self.state = "ID";
+ }
+ continue;
+ case "ID":
+ // Check for the start of NOTE blocks.
+ if (/^NOTE($|[ \t])/.test(line)) {
+ self.state = "NOTE";
+ break;
+ }
+ // 19-29 - Allow any number of line terminators, then initialize new cue values.
+ if (!line) {
+ continue;
+ }
+ self.cue = new (self.vttjs.VTTCue || self.window.VTTCue)(0, 0, "");
+ // Safari still uses the old middle value and won't accept center
+ try {
+ self.cue.align = "center";
+ } catch (e) {
+ self.cue.align = "middle";
+ }
+ self.state = "CUE";
+ // 30-39 - Check if self line contains an optional identifier or timing data.
+ if (line.indexOf("-->") === -1) {
+ self.cue.id = line;
+ continue;
+ }
+ // Process line as start of a cue.
+ /*falls through*/
+ case "CUE":
+ // 40 - Collect cue timings and settings.
+ try {
+ parseCue(line, self.cue, self.regionList);
+ } catch (e) {
+ self.reportOrThrowError(e);
+ // In case of an error ignore rest of the cue.
+ self.cue = null;
+ self.state = "BADCUE";
+ continue;
+ }
+ self.state = "CUETEXT";
+ continue;
+ case "CUETEXT":
+ var hasSubstring = line.indexOf("-->") !== -1;
+ // 34 - If we have an empty line then report the cue.
+ // 35 - If we have the special substring '-->' then report the cue,
+ // but do not collect the line as we need to process the current
+ // one as a new cue.
+ if (!line || hasSubstring && (alreadyCollectedLine = true)) {
+ // We are done parsing self cue.
+ self.oncue && self.oncue(self.cue);
+ self.cue = null;
+ self.state = "ID";
+ continue;
+ }
+ if (self.cue.text) {
+ self.cue.text += "\n";
+ }
+ self.cue.text += line.replace(/\u2028/g, '\n').replace(/u2029/g, '\n');
+ continue;
+ case "BADCUE":
+ // BADCUE
+ // 54-62 - Collect and discard the remaining cue.
+ if (!line) {
+ self.state = "ID";
+ }
+ continue;
+ }
+ }
+ } catch (e) {
+ self.reportOrThrowError(e);
+
+ // If we are currently parsing a cue, report what we have.
+ if (self.state === "CUETEXT" && self.cue && self.oncue) {
+ self.oncue(self.cue);
+ }
+ self.cue = null;
+ // Enter BADWEBVTT state if header was not parsed correctly otherwise
+ // another exception occurred so enter BADCUE state.
+ self.state = self.state === "INITIAL" ? "BADWEBVTT" : "BADCUE";
+ }
+ return this;
+ },
+ flush: function () {
+ var self = this;
+ try {
+ // Finish decoding the stream.
+ self.buffer += self.decoder.decode();
+ // Synthesize the end of the current cue or region.
+ if (self.cue || self.state === "HEADER") {
+ self.buffer += "\n\n";
+ self.parse();
+ }
+ // If we've flushed, parsed, and we're still on the INITIAL state then
+ // that means we don't have enough of the stream to parse the first
+ // line.
+ if (self.state === "INITIAL") {
+ throw new ParsingError(ParsingError.Errors.BadSignature);
+ }
+ } catch (e) {
+ self.reportOrThrowError(e);
+ }
+ self.onflush && self.onflush();
+ return this;
+ }
+ };
+ var vtt = WebVTT$1;
+
+ /**
+ * Copyright 2013 vtt.js Contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+ var autoKeyword = "auto";
+ var directionSetting = {
+ "": 1,
+ "lr": 1,
+ "rl": 1
+ };
+ var alignSetting = {
+ "start": 1,
+ "center": 1,
+ "end": 1,
+ "left": 1,
+ "right": 1,
+ "auto": 1,
+ "line-left": 1,
+ "line-right": 1
+ };
+ function findDirectionSetting(value) {
+ if (typeof value !== "string") {
+ return false;
+ }
+ var dir = directionSetting[value.toLowerCase()];
+ return dir ? value.toLowerCase() : false;
+ }
+ function findAlignSetting(value) {
+ if (typeof value !== "string") {
+ return false;
+ }
+ var align = alignSetting[value.toLowerCase()];
+ return align ? value.toLowerCase() : false;
+ }
+ function VTTCue(startTime, endTime, text) {
+ /**
+ * Shim implementation specific properties. These properties are not in
+ * the spec.
+ */
+
+ // Lets us know when the VTTCue's data has changed in such a way that we need
+ // to recompute its display state. This lets us compute its display state
+ // lazily.
+ this.hasBeenReset = false;
+
+ /**
+ * VTTCue and TextTrackCue properties
+ * http://dev.w3.org/html5/webvtt/#vttcue-interface
+ */
+
+ var _id = "";
+ var _pauseOnExit = false;
+ var _startTime = startTime;
+ var _endTime = endTime;
+ var _text = text;
+ var _region = null;
+ var _vertical = "";
+ var _snapToLines = true;
+ var _line = "auto";
+ var _lineAlign = "start";
+ var _position = "auto";
+ var _positionAlign = "auto";
+ var _size = 100;
+ var _align = "center";
+ Object.defineProperties(this, {
+ "id": {
+ enumerable: true,
+ get: function () {
+ return _id;
+ },
+ set: function (value) {
+ _id = "" + value;
+ }
+ },
+ "pauseOnExit": {
+ enumerable: true,
+ get: function () {
+ return _pauseOnExit;
+ },
+ set: function (value) {
+ _pauseOnExit = !!value;
+ }
+ },
+ "startTime": {
+ enumerable: true,
+ get: function () {
+ return _startTime;
+ },
+ set: function (value) {
+ if (typeof value !== "number") {
+ throw new TypeError("Start time must be set to a number.");
+ }
+ _startTime = value;
+ this.hasBeenReset = true;
+ }
+ },
+ "endTime": {
+ enumerable: true,
+ get: function () {
+ return _endTime;
+ },
+ set: function (value) {
+ if (typeof value !== "number") {
+ throw new TypeError("End time must be set to a number.");
+ }
+ _endTime = value;
+ this.hasBeenReset = true;
+ }
+ },
+ "text": {
+ enumerable: true,
+ get: function () {
+ return _text;
+ },
+ set: function (value) {
+ _text = "" + value;
+ this.hasBeenReset = true;
+ }
+ },
+ "region": {
+ enumerable: true,
+ get: function () {
+ return _region;
+ },
+ set: function (value) {
+ _region = value;
+ this.hasBeenReset = true;
+ }
+ },
+ "vertical": {
+ enumerable: true,
+ get: function () {
+ return _vertical;
+ },
+ set: function (value) {
+ var setting = findDirectionSetting(value);
+ // Have to check for false because the setting an be an empty string.
+ if (setting === false) {
+ throw new SyntaxError("Vertical: an invalid or illegal direction string was specified.");
+ }
+ _vertical = setting;
+ this.hasBeenReset = true;
+ }
+ },
+ "snapToLines": {
+ enumerable: true,
+ get: function () {
+ return _snapToLines;
+ },
+ set: function (value) {
+ _snapToLines = !!value;
+ this.hasBeenReset = true;
+ }
+ },
+ "line": {
+ enumerable: true,
+ get: function () {
+ return _line;
+ },
+ set: function (value) {
+ if (typeof value !== "number" && value !== autoKeyword) {
+ throw new SyntaxError("Line: an invalid number or illegal string was specified.");
+ }
+ _line = value;
+ this.hasBeenReset = true;
+ }
+ },
+ "lineAlign": {
+ enumerable: true,
+ get: function () {
+ return _lineAlign;
+ },
+ set: function (value) {
+ var setting = findAlignSetting(value);
+ if (!setting) {
+ console.warn("lineAlign: an invalid or illegal string was specified.");
+ } else {
+ _lineAlign = setting;
+ this.hasBeenReset = true;
+ }
+ }
+ },
+ "position": {
+ enumerable: true,
+ get: function () {
+ return _position;
+ },
+ set: function (value) {
+ if (value < 0 || value > 100) {
+ throw new Error("Position must be between 0 and 100.");
+ }
+ _position = value;
+ this.hasBeenReset = true;
+ }
+ },
+ "positionAlign": {
+ enumerable: true,
+ get: function () {
+ return _positionAlign;
+ },
+ set: function (value) {
+ var setting = findAlignSetting(value);
+ if (!setting) {
+ console.warn("positionAlign: an invalid or illegal string was specified.");
+ } else {
+ _positionAlign = setting;
+ this.hasBeenReset = true;
+ }
+ }
+ },
+ "size": {
+ enumerable: true,
+ get: function () {
+ return _size;
+ },
+ set: function (value) {
+ if (value < 0 || value > 100) {
+ throw new Error("Size must be between 0 and 100.");
+ }
+ _size = value;
+ this.hasBeenReset = true;
+ }
+ },
+ "align": {
+ enumerable: true,
+ get: function () {
+ return _align;
+ },
+ set: function (value) {
+ var setting = findAlignSetting(value);
+ if (!setting) {
+ throw new SyntaxError("align: an invalid or illegal alignment string was specified.");
+ }
+ _align = setting;
+ this.hasBeenReset = true;
+ }
+ }
+ });
+
+ /**
+ * Other <track> spec defined properties
+ */
+
+ // http://www.whatwg.org/specs/web-apps/current-work/multipage/the-video-element.html#text-track-cue-display-state
+ this.displayState = undefined;
+ }
+
+ /**
+ * VTTCue methods
+ */
+
+ VTTCue.prototype.getCueAsHTML = function () {
+ // Assume WebVTT.convertCueToDOMTree is on the global.
+ return WebVTT.convertCueToDOMTree(window, this.text);
+ };
+ var vttcue = VTTCue;
+
+ /**
+ * Copyright 2013 vtt.js Contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+ var scrollSetting = {
+ "": true,
+ "up": true
+ };
+ function findScrollSetting(value) {
+ if (typeof value !== "string") {
+ return false;
+ }
+ var scroll = scrollSetting[value.toLowerCase()];
+ return scroll ? value.toLowerCase() : false;
+ }
+ function isValidPercentValue(value) {
+ return typeof value === "number" && value >= 0 && value <= 100;
+ }
+
+ // VTTRegion shim http://dev.w3.org/html5/webvtt/#vttregion-interface
+ function VTTRegion() {
+ var _width = 100;
+ var _lines = 3;
+ var _regionAnchorX = 0;
+ var _regionAnchorY = 100;
+ var _viewportAnchorX = 0;
+ var _viewportAnchorY = 100;
+ var _scroll = "";
+ Object.defineProperties(this, {
+ "width": {
+ enumerable: true,
+ get: function () {
+ return _width;
+ },
+ set: function (value) {
+ if (!isValidPercentValue(value)) {
+ throw new Error("Width must be between 0 and 100.");
+ }
+ _width = value;
+ }
+ },
+ "lines": {
+ enumerable: true,
+ get: function () {
+ return _lines;
+ },
+ set: function (value) {
+ if (typeof value !== "number") {
+ throw new TypeError("Lines must be set to a number.");
+ }
+ _lines = value;
+ }
+ },
+ "regionAnchorY": {
+ enumerable: true,
+ get: function () {
+ return _regionAnchorY;
+ },
+ set: function (value) {
+ if (!isValidPercentValue(value)) {
+ throw new Error("RegionAnchorX must be between 0 and 100.");
+ }
+ _regionAnchorY = value;
+ }
+ },
+ "regionAnchorX": {
+ enumerable: true,
+ get: function () {
+ return _regionAnchorX;
+ },
+ set: function (value) {
+ if (!isValidPercentValue(value)) {
+ throw new Error("RegionAnchorY must be between 0 and 100.");
+ }
+ _regionAnchorX = value;
+ }
+ },
+ "viewportAnchorY": {
+ enumerable: true,
+ get: function () {
+ return _viewportAnchorY;
+ },
+ set: function (value) {
+ if (!isValidPercentValue(value)) {
+ throw new Error("ViewportAnchorY must be between 0 and 100.");
+ }
+ _viewportAnchorY = value;
+ }
+ },
+ "viewportAnchorX": {
+ enumerable: true,
+ get: function () {
+ return _viewportAnchorX;
+ },
+ set: function (value) {
+ if (!isValidPercentValue(value)) {
+ throw new Error("ViewportAnchorX must be between 0 and 100.");
+ }
+ _viewportAnchorX = value;
+ }
+ },
+ "scroll": {
+ enumerable: true,
+ get: function () {
+ return _scroll;
+ },
+ set: function (value) {
+ var setting = findScrollSetting(value);
+ // Have to check for false as an empty string is a legal value.
+ if (setting === false) {
+ console.warn("Scroll: an invalid or illegal string was specified.");
+ } else {
+ _scroll = setting;
+ }
+ }
+ }
+ });
+ }
+ var vttregion = VTTRegion;
+
+ var browserIndex = createCommonjsModule(function (module) {
+ /**
+ * Copyright 2013 vtt.js Contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+ // Default exports for Node. Export the extended versions of VTTCue and
+ // VTTRegion in Node since we likely want the capability to convert back and
+ // forth between JSON. If we don't then it's not that big of a deal since we're
+ // off browser.
+
+ var vttjs = module.exports = {
+ WebVTT: vtt,
+ VTTCue: vttcue,
+ VTTRegion: vttregion
+ };
+ window_1.vttjs = vttjs;
+ window_1.WebVTT = vttjs.WebVTT;
+ var cueShim = vttjs.VTTCue;
+ var regionShim = vttjs.VTTRegion;
+ var nativeVTTCue = window_1.VTTCue;
+ var nativeVTTRegion = window_1.VTTRegion;
+ vttjs.shim = function () {
+ window_1.VTTCue = cueShim;
+ window_1.VTTRegion = regionShim;
+ };
+ vttjs.restore = function () {
+ window_1.VTTCue = nativeVTTCue;
+ window_1.VTTRegion = nativeVTTRegion;
+ };
+ if (!window_1.VTTCue) {
+ vttjs.shim();
+ }
+ });
+ browserIndex.WebVTT;
+ browserIndex.VTTCue;
+ browserIndex.VTTRegion;
+
+ /**
+ * @file tech.js
+ */
+
+ /**
+ * An Object containing a structure like: `{src: 'url', type: 'mimetype'}` or string
+ * that just contains the src url alone.
+ * * `var SourceObject = {src: 'http://ex.com/video.mp4', type: 'video/mp4'};`
+ * `var SourceString = 'http://example.com/some-video.mp4';`
+ *
+ * @typedef {Object|string} SourceObject
+ *
+ * @property {string} src
+ * The url to the source
+ *
+ * @property {string} type
+ * The mime type of the source
+ */
+
+ /**
+ * A function used by {@link Tech} to create a new {@link TextTrack}.
+ *
+ * @private
+ *
+ * @param {Tech} self
+ * An instance of the Tech class.
+ *
+ * @param {string} kind
+ * `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata)
+ *
+ * @param {string} [label]
+ * Label to identify the text track
+ *
+ * @param {string} [language]
+ * Two letter language abbreviation
+ *
+ * @param {Object} [options={}]
+ * An object with additional text track options
+ *
+ * @return {TextTrack}
+ * The text track that was created.
+ */
+ function createTrackHelper(self, kind, label, language, options = {}) {
+ const tracks = self.textTracks();
+ options.kind = kind;
+ if (label) {
+ options.label = label;
+ }
+ if (language) {
+ options.language = language;
+ }
+ options.tech = self;
+ const track = new ALL.text.TrackClass(options);
+ tracks.addTrack(track);
+ return track;
+ }
+
+ /**
+ * This is the base class for media playback technology controllers, such as
+ * {@link HTML5}
+ *
+ * @extends Component
+ */
+ class Tech extends Component$1 {
+ /**
+ * Create an instance of this Tech.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ *
+ * @param {Function} [ready]
+ * Callback function to call when the `HTML5` Tech is ready.
+ */
+ constructor(options = {}, ready = function () {}) {
+ // we don't want the tech to report user activity automatically.
+ // This is done manually in addControlsListeners
+ options.reportTouchActivity = false;
+ super(null, options, ready);
+ this.onDurationChange_ = e => this.onDurationChange(e);
+ this.trackProgress_ = e => this.trackProgress(e);
+ this.trackCurrentTime_ = e => this.trackCurrentTime(e);
+ this.stopTrackingCurrentTime_ = e => this.stopTrackingCurrentTime(e);
+ this.disposeSourceHandler_ = e => this.disposeSourceHandler(e);
+ this.queuedHanders_ = new Set();
+
+ // keep track of whether the current source has played at all to
+ // implement a very limited played()
+ this.hasStarted_ = false;
+ this.on('playing', function () {
+ this.hasStarted_ = true;
+ });
+ this.on('loadstart', function () {
+ this.hasStarted_ = false;
+ });
+ ALL.names.forEach(name => {
+ const props = ALL[name];
+ if (options && options[props.getterName]) {
+ this[props.privateName] = options[props.getterName];
+ }
+ });
+
+ // Manually track progress in cases where the browser/tech doesn't report it.
+ if (!this.featuresProgressEvents) {
+ this.manualProgressOn();
+ }
+
+ // Manually track timeupdates in cases where the browser/tech doesn't report it.
+ if (!this.featuresTimeupdateEvents) {
+ this.manualTimeUpdatesOn();
+ }
+ ['Text', 'Audio', 'Video'].forEach(track => {
+ if (options[`native${track}Tracks`] === false) {
+ this[`featuresNative${track}Tracks`] = false;
+ }
+ });
+ if (options.nativeCaptions === false || options.nativeTextTracks === false) {
+ this.featuresNativeTextTracks = false;
+ } else if (options.nativeCaptions === true || options.nativeTextTracks === true) {
+ this.featuresNativeTextTracks = true;
+ }
+ if (!this.featuresNativeTextTracks) {
+ this.emulateTextTracks();
+ }
+ this.preloadTextTracks = options.preloadTextTracks !== false;
+ this.autoRemoteTextTracks_ = new ALL.text.ListClass();
+ this.initTrackListeners();
+
+ // Turn on component tap events only if not using native controls
+ if (!options.nativeControlsForTouch) {
+ this.emitTapEvents();
+ }
+ if (this.constructor) {
+ this.name_ = this.constructor.name || 'Unknown Tech';
+ }
+ }
+
+ /**
+ * A special function to trigger source set in a way that will allow player
+ * to re-trigger if the player or tech are not ready yet.
+ *
+ * @fires Tech#sourceset
+ * @param {string} src The source string at the time of the source changing.
+ */
+ triggerSourceset(src) {
+ if (!this.isReady_) {
+ // on initial ready we have to trigger source set
+ // 1ms after ready so that player can watch for it.
+ this.one('ready', () => this.setTimeout(() => this.triggerSourceset(src), 1));
+ }
+
+ /**
+ * Fired when the source is set on the tech causing the media element
+ * to reload.
+ *
+ * @see {@link Player#event:sourceset}
+ * @event Tech#sourceset
+ * @type {Event}
+ */
+ this.trigger({
+ src,
+ type: 'sourceset'
+ });
+ }
+
+ /* Fallbacks for unsupported event types
+ ================================================================================ */
+
+ /**
+ * Polyfill the `progress` event for browsers that don't support it natively.
+ *
+ * @see {@link Tech#trackProgress}
+ */
+ manualProgressOn() {
+ this.on('durationchange', this.onDurationChange_);
+ this.manualProgress = true;
+
+ // Trigger progress watching when a source begins loading
+ this.one('ready', this.trackProgress_);
+ }
+
+ /**
+ * Turn off the polyfill for `progress` events that was created in
+ * {@link Tech#manualProgressOn}
+ */
+ manualProgressOff() {
+ this.manualProgress = false;
+ this.stopTrackingProgress();
+ this.off('durationchange', this.onDurationChange_);
+ }
+
+ /**
+ * This is used to trigger a `progress` event when the buffered percent changes. It
+ * sets an interval function that will be called every 500 milliseconds to check if the
+ * buffer end percent has changed.
+ *
+ * > This function is called by {@link Tech#manualProgressOn}
+ *
+ * @param {Event} event
+ * The `ready` event that caused this to run.
+ *
+ * @listens Tech#ready
+ * @fires Tech#progress
+ */
+ trackProgress(event) {
+ this.stopTrackingProgress();
+ this.progressInterval = this.setInterval(bind_(this, function () {
+ // Don't trigger unless buffered amount is greater than last time
+
+ const numBufferedPercent = this.bufferedPercent();
+ if (this.bufferedPercent_ !== numBufferedPercent) {
+ /**
+ * See {@link Player#progress}
+ *
+ * @event Tech#progress
+ * @type {Event}
+ */
+ this.trigger('progress');
+ }
+ this.bufferedPercent_ = numBufferedPercent;
+ if (numBufferedPercent === 1) {
+ this.stopTrackingProgress();
+ }
+ }), 500);
+ }
+
+ /**
+ * Update our internal duration on a `durationchange` event by calling
+ * {@link Tech#duration}.
+ *
+ * @param {Event} event
+ * The `durationchange` event that caused this to run.
+ *
+ * @listens Tech#durationchange
+ */
+ onDurationChange(event) {
+ this.duration_ = this.duration();
+ }
+
+ /**
+ * Get and create a `TimeRange` object for buffering.
+ *
+ * @return { import('../utils/time').TimeRange }
+ * The time range object that was created.
+ */
+ buffered() {
+ return createTimeRanges$1(0, 0);
+ }
+
+ /**
+ * Get the percentage of the current video that is currently buffered.
+ *
+ * @return {number}
+ * A number from 0 to 1 that represents the decimal percentage of the
+ * video that is buffered.
+ *
+ */
+ bufferedPercent() {
+ return bufferedPercent(this.buffered(), this.duration_);
+ }
+
+ /**
+ * Turn off the polyfill for `progress` events that was created in
+ * {@link Tech#manualProgressOn}
+ * Stop manually tracking progress events by clearing the interval that was set in
+ * {@link Tech#trackProgress}.
+ */
+ stopTrackingProgress() {
+ this.clearInterval(this.progressInterval);
+ }
+
+ /**
+ * Polyfill the `timeupdate` event for browsers that don't support it.
+ *
+ * @see {@link Tech#trackCurrentTime}
+ */
+ manualTimeUpdatesOn() {
+ this.manualTimeUpdates = true;
+ this.on('play', this.trackCurrentTime_);
+ this.on('pause', this.stopTrackingCurrentTime_);
+ }
+
+ /**
+ * Turn off the polyfill for `timeupdate` events that was created in
+ * {@link Tech#manualTimeUpdatesOn}
+ */
+ manualTimeUpdatesOff() {
+ this.manualTimeUpdates = false;
+ this.stopTrackingCurrentTime();
+ this.off('play', this.trackCurrentTime_);
+ this.off('pause', this.stopTrackingCurrentTime_);
+ }
+
+ /**
+ * Sets up an interval function to track current time and trigger `timeupdate` every
+ * 250 milliseconds.
+ *
+ * @listens Tech#play
+ * @triggers Tech#timeupdate
+ */
+ trackCurrentTime() {
+ if (this.currentTimeInterval) {
+ this.stopTrackingCurrentTime();
+ }
+ this.currentTimeInterval = this.setInterval(function () {
+ /**
+ * Triggered at an interval of 250ms to indicated that time is passing in the video.
+ *
+ * @event Tech#timeupdate
+ * @type {Event}
+ */
+ this.trigger({
+ type: 'timeupdate',
+ target: this,
+ manuallyTriggered: true
+ });
+
+ // 42 = 24 fps // 250 is what Webkit uses // FF uses 15
+ }, 250);
+ }
+
+ /**
+ * Stop the interval function created in {@link Tech#trackCurrentTime} so that the
+ * `timeupdate` event is no longer triggered.
+ *
+ * @listens {Tech#pause}
+ */
+ stopTrackingCurrentTime() {
+ this.clearInterval(this.currentTimeInterval);
+
+ // #1002 - if the video ends right before the next timeupdate would happen,
+ // the progress bar won't make it all the way to the end
+ this.trigger({
+ type: 'timeupdate',
+ target: this,
+ manuallyTriggered: true
+ });
+ }
+
+ /**
+ * Turn off all event polyfills, clear the `Tech`s {@link AudioTrackList},
+ * {@link VideoTrackList}, and {@link TextTrackList}, and dispose of this Tech.
+ *
+ * @fires Component#dispose
+ */
+ dispose() {
+ // clear out all tracks because we can't reuse them between techs
+ this.clearTracks(NORMAL.names);
+
+ // Turn off any manual progress or timeupdate tracking
+ if (this.manualProgress) {
+ this.manualProgressOff();
+ }
+ if (this.manualTimeUpdates) {
+ this.manualTimeUpdatesOff();
+ }
+ super.dispose();
+ }
+
+ /**
+ * Clear out a single `TrackList` or an array of `TrackLists` given their names.
+ *
+ * > Note: Techs without source handlers should call this between sources for `video`
+ * & `audio` tracks. You don't want to use them between tracks!
+ *
+ * @param {string[]|string} types
+ * TrackList names to clear, valid names are `video`, `audio`, and
+ * `text`.
+ */
+ clearTracks(types) {
+ types = [].concat(types);
+ // clear out all tracks because we can't reuse them between techs
+ types.forEach(type => {
+ const list = this[`${type}Tracks`]() || [];
+ let i = list.length;
+ while (i--) {
+ const track = list[i];
+ if (type === 'text') {
+ this.removeRemoteTextTrack(track);
+ }
+ list.removeTrack(track);
+ }
+ });
+ }
+
+ /**
+ * Remove any TextTracks added via addRemoteTextTrack that are
+ * flagged for automatic garbage collection
+ */
+ cleanupAutoTextTracks() {
+ const list = this.autoRemoteTextTracks_ || [];
+ let i = list.length;
+ while (i--) {
+ const track = list[i];
+ this.removeRemoteTextTrack(track);
+ }
+ }
+
+ /**
+ * Reset the tech, which will removes all sources and reset the internal readyState.
+ *
+ * @abstract
+ */
+ reset() {}
+
+ /**
+ * Get the value of `crossOrigin` from the tech.
+ *
+ * @abstract
+ *
+ * @see {Html5#crossOrigin}
+ */
+ crossOrigin() {}
+
+ /**
+ * Set the value of `crossOrigin` on the tech.
+ *
+ * @abstract
+ *
+ * @param {string} crossOrigin the crossOrigin value
+ * @see {Html5#setCrossOrigin}
+ */
+ setCrossOrigin() {}
+
+ /**
+ * Get or set an error on the Tech.
+ *
+ * @param {MediaError} [err]
+ * Error to set on the Tech
+ *
+ * @return {MediaError|null}
+ * The current error object on the tech, or null if there isn't one.
+ */
+ error(err) {
+ if (err !== undefined) {
+ this.error_ = new MediaError(err);
+ this.trigger('error');
+ }
+ return this.error_;
+ }
+
+ /**
+ * Returns the `TimeRange`s that have been played through for the current source.
+ *
+ * > NOTE: This implementation is incomplete. It does not track the played `TimeRange`.
+ * It only checks whether the source has played at all or not.
+ *
+ * @return { import('../utils/time').TimeRange }
+ * - A single time range if this video has played
+ * - An empty set of ranges if not.
+ */
+ played() {
+ if (this.hasStarted_) {
+ return createTimeRanges$1(0, 0);
+ }
+ return createTimeRanges$1();
+ }
+
+ /**
+ * Start playback
+ *
+ * @abstract
+ *
+ * @see {Html5#play}
+ */
+ play() {}
+
+ /**
+ * Set whether we are scrubbing or not
+ *
+ * @abstract
+ * @param {boolean} _isScrubbing
+ * - true for we are currently scrubbing
+ * - false for we are no longer scrubbing
+ *
+ * @see {Html5#setScrubbing}
+ */
+ setScrubbing(_isScrubbing) {}
+
+ /**
+ * Get whether we are scrubbing or not
+ *
+ * @abstract
+ *
+ * @see {Html5#scrubbing}
+ */
+ scrubbing() {}
+
+ /**
+ * Causes a manual time update to occur if {@link Tech#manualTimeUpdatesOn} was
+ * previously called.
+ *
+ * @param {number} _seconds
+ * Set the current time of the media to this.
+ * @fires Tech#timeupdate
+ */
+ setCurrentTime(_seconds) {
+ // improve the accuracy of manual timeupdates
+ if (this.manualTimeUpdates) {
+ /**
+ * A manual `timeupdate` event.
+ *
+ * @event Tech#timeupdate
+ * @type {Event}
+ */
+ this.trigger({
+ type: 'timeupdate',
+ target: this,
+ manuallyTriggered: true
+ });
+ }
+ }
+
+ /**
+ * Turn on listeners for {@link VideoTrackList}, {@link {AudioTrackList}, and
+ * {@link TextTrackList} events.
+ *
+ * This adds {@link EventTarget~EventListeners} for `addtrack`, and `removetrack`.
+ *
+ * @fires Tech#audiotrackchange
+ * @fires Tech#videotrackchange
+ * @fires Tech#texttrackchange
+ */
+ initTrackListeners() {
+ /**
+ * Triggered when tracks are added or removed on the Tech {@link AudioTrackList}
+ *
+ * @event Tech#audiotrackchange
+ * @type {Event}
+ */
+
+ /**
+ * Triggered when tracks are added or removed on the Tech {@link VideoTrackList}
+ *
+ * @event Tech#videotrackchange
+ * @type {Event}
+ */
+
+ /**
+ * Triggered when tracks are added or removed on the Tech {@link TextTrackList}
+ *
+ * @event Tech#texttrackchange
+ * @type {Event}
+ */
+ NORMAL.names.forEach(name => {
+ const props = NORMAL[name];
+ const trackListChanges = () => {
+ this.trigger(`${name}trackchange`);
+ };
+ const tracks = this[props.getterName]();
+ tracks.addEventListener('removetrack', trackListChanges);
+ tracks.addEventListener('addtrack', trackListChanges);
+ this.on('dispose', () => {
+ tracks.removeEventListener('removetrack', trackListChanges);
+ tracks.removeEventListener('addtrack', trackListChanges);
+ });
+ });
+ }
+
+ /**
+ * Emulate TextTracks using vtt.js if necessary
+ *
+ * @fires Tech#vttjsloaded
+ * @fires Tech#vttjserror
+ */
+ addWebVttScript_() {
+ if (window.WebVTT) {
+ return;
+ }
+
+ // Initially, Tech.el_ is a child of a dummy-div wait until the Component system
+ // signals that the Tech is ready at which point Tech.el_ is part of the DOM
+ // before inserting the WebVTT script
+ if (document.body.contains(this.el())) {
+ // load via require if available and vtt.js script location was not passed in
+ // as an option. novtt builds will turn the above require call into an empty object
+ // which will cause this if check to always fail.
+ if (!this.options_['vtt.js'] && isPlain(browserIndex) && Object.keys(browserIndex).length > 0) {
+ this.trigger('vttjsloaded');
+ return;
+ }
+
+ // load vtt.js via the script location option or the cdn of no location was
+ // passed in
+ const script = document.createElement('script');
+ script.src = this.options_['vtt.js'] || 'https://vjs.zencdn.net/vttjs/0.14.1/vtt.min.js';
+ script.onload = () => {
+ /**
+ * Fired when vtt.js is loaded.
+ *
+ * @event Tech#vttjsloaded
+ * @type {Event}
+ */
+ this.trigger('vttjsloaded');
+ };
+ script.onerror = () => {
+ /**
+ * Fired when vtt.js was not loaded due to an error
+ *
+ * @event Tech#vttjsloaded
+ * @type {Event}
+ */
+ this.trigger('vttjserror');
+ };
+ this.on('dispose', () => {
+ script.onload = null;
+ script.onerror = null;
+ });
+ // but have not loaded yet and we set it to true before the inject so that
+ // we don't overwrite the injected window.WebVTT if it loads right away
+ window.WebVTT = true;
+ this.el().parentNode.appendChild(script);
+ } else {
+ this.ready(this.addWebVttScript_);
+ }
+ }
+
+ /**
+ * Emulate texttracks
+ *
+ */
+ emulateTextTracks() {
+ const tracks = this.textTracks();
+ const remoteTracks = this.remoteTextTracks();
+ const handleAddTrack = e => tracks.addTrack(e.track);
+ const handleRemoveTrack = e => tracks.removeTrack(e.track);
+ remoteTracks.on('addtrack', handleAddTrack);
+ remoteTracks.on('removetrack', handleRemoveTrack);
+ this.addWebVttScript_();
+ const updateDisplay = () => this.trigger('texttrackchange');
+ const textTracksChanges = () => {
+ updateDisplay();
+ for (let i = 0; i < tracks.length; i++) {
+ const track = tracks[i];
+ track.removeEventListener('cuechange', updateDisplay);
+ if (track.mode === 'showing') {
+ track.addEventListener('cuechange', updateDisplay);
+ }
+ }
+ };
+ textTracksChanges();
+ tracks.addEventListener('change', textTracksChanges);
+ tracks.addEventListener('addtrack', textTracksChanges);
+ tracks.addEventListener('removetrack', textTracksChanges);
+ this.on('dispose', function () {
+ remoteTracks.off('addtrack', handleAddTrack);
+ remoteTracks.off('removetrack', handleRemoveTrack);
+ tracks.removeEventListener('change', textTracksChanges);
+ tracks.removeEventListener('addtrack', textTracksChanges);
+ tracks.removeEventListener('removetrack', textTracksChanges);
+ for (let i = 0; i < tracks.length; i++) {
+ const track = tracks[i];
+ track.removeEventListener('cuechange', updateDisplay);
+ }
+ });
+ }
+
+ /**
+ * Create and returns a remote {@link TextTrack} object.
+ *
+ * @param {string} kind
+ * `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata)
+ *
+ * @param {string} [label]
+ * Label to identify the text track
+ *
+ * @param {string} [language]
+ * Two letter language abbreviation
+ *
+ * @return {TextTrack}
+ * The TextTrack that gets created.
+ */
+ addTextTrack(kind, label, language) {
+ if (!kind) {
+ throw new Error('TextTrack kind is required but was not provided');
+ }
+ return createTrackHelper(this, kind, label, language);
+ }
+
+ /**
+ * Create an emulated TextTrack for use by addRemoteTextTrack
+ *
+ * This is intended to be overridden by classes that inherit from
+ * Tech in order to create native or custom TextTracks.
+ *
+ * @param {Object} options
+ * The object should contain the options to initialize the TextTrack with.
+ *
+ * @param {string} [options.kind]
+ * `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata).
+ *
+ * @param {string} [options.label].
+ * Label to identify the text track
+ *
+ * @param {string} [options.language]
+ * Two letter language abbreviation.
+ *
+ * @return {HTMLTrackElement}
+ * The track element that gets created.
+ */
+ createRemoteTextTrack(options) {
+ const track = merge$2(options, {
+ tech: this
+ });
+ return new REMOTE.remoteTextEl.TrackClass(track);
+ }
+
+ /**
+ * Creates a remote text track object and returns an html track element.
+ *
+ * > Note: This can be an emulated {@link HTMLTrackElement} or a native one.
+ *
+ * @param {Object} options
+ * See {@link Tech#createRemoteTextTrack} for more detailed properties.
+ *
+ * @param {boolean} [manualCleanup=false]
+ * - When false: the TextTrack will be automatically removed from the video
+ * element whenever the source changes
+ * - When True: The TextTrack will have to be cleaned up manually
+ *
+ * @return {HTMLTrackElement}
+ * An Html Track Element.
+ *
+ */
+ addRemoteTextTrack(options = {}, manualCleanup) {
+ const htmlTrackElement = this.createRemoteTextTrack(options);
+ if (typeof manualCleanup !== 'boolean') {
+ manualCleanup = false;
+ }
+
+ // store HTMLTrackElement and TextTrack to remote list
+ this.remoteTextTrackEls().addTrackElement_(htmlTrackElement);
+ this.remoteTextTracks().addTrack(htmlTrackElement.track);
+ if (manualCleanup === false) {
+ // create the TextTrackList if it doesn't exist
+ this.ready(() => this.autoRemoteTextTracks_.addTrack(htmlTrackElement.track));
+ }
+ return htmlTrackElement;
+ }
+
+ /**
+ * Remove a remote text track from the remote `TextTrackList`.
+ *
+ * @param {TextTrack} track
+ * `TextTrack` to remove from the `TextTrackList`
+ */
+ removeRemoteTextTrack(track) {
+ const trackElement = this.remoteTextTrackEls().getTrackElementByTrack_(track);
+
+ // remove HTMLTrackElement and TextTrack from remote list
+ this.remoteTextTrackEls().removeTrackElement_(trackElement);
+ this.remoteTextTracks().removeTrack(track);
+ this.autoRemoteTextTracks_.removeTrack(track);
+ }
+
+ /**
+ * Gets available media playback quality metrics as specified by the W3C's Media
+ * Playback Quality API.
+ *
+ * @see [Spec]{@link https://wicg.github.io/media-playback-quality}
+ *
+ * @return {Object}
+ * An object with supported media playback quality metrics
+ *
+ * @abstract
+ */
+ getVideoPlaybackQuality() {
+ return {};
+ }
+
+ /**
+ * Attempt to create a floating video window always on top of other windows
+ * so that users may continue consuming media while they interact with other
+ * content sites, or applications on their device.
+ *
+ * @see [Spec]{@link https://wicg.github.io/picture-in-picture}
+ *
+ * @return {Promise|undefined}
+ * A promise with a Picture-in-Picture window if the browser supports
+ * Promises (or one was passed in as an option). It returns undefined
+ * otherwise.
+ *
+ * @abstract
+ */
+ requestPictureInPicture() {
+ return Promise.reject();
+ }
+
+ /**
+ * A method to check for the value of the 'disablePictureInPicture' <video> property.
+ * Defaults to true, as it should be considered disabled if the tech does not support pip
+ *
+ * @abstract
+ */
+ disablePictureInPicture() {
+ return true;
+ }
+
+ /**
+ * A method to set or unset the 'disablePictureInPicture' <video> property.
+ *
+ * @abstract
+ */
+ setDisablePictureInPicture() {}
+
+ /**
+ * A fallback implementation of requestVideoFrameCallback using requestAnimationFrame
+ *
+ * @param {function} cb
+ * @return {number} request id
+ */
+ requestVideoFrameCallback(cb) {
+ const id = newGUID();
+ if (!this.isReady_ || this.paused()) {
+ this.queuedHanders_.add(id);
+ this.one('playing', () => {
+ if (this.queuedHanders_.has(id)) {
+ this.queuedHanders_.delete(id);
+ cb();
+ }
+ });
+ } else {
+ this.requestNamedAnimationFrame(id, cb);
+ }
+ return id;
+ }
+
+ /**
+ * A fallback implementation of cancelVideoFrameCallback
+ *
+ * @param {number} id id of callback to be cancelled
+ */
+ cancelVideoFrameCallback(id) {
+ if (this.queuedHanders_.has(id)) {
+ this.queuedHanders_.delete(id);
+ } else {
+ this.cancelNamedAnimationFrame(id);
+ }
+ }
+
+ /**
+ * A method to set a poster from a `Tech`.
+ *
+ * @abstract
+ */
+ setPoster() {}
+
+ /**
+ * A method to check for the presence of the 'playsinline' <video> attribute.
+ *
+ * @abstract
+ */
+ playsinline() {}
+
+ /**
+ * A method to set or unset the 'playsinline' <video> attribute.
+ *
+ * @abstract
+ */
+ setPlaysinline() {}
+
+ /**
+ * Attempt to force override of native audio tracks.
+ *
+ * @param {boolean} override - If set to true native audio will be overridden,
+ * otherwise native audio will potentially be used.
+ *
+ * @abstract
+ */
+ overrideNativeAudioTracks(override) {}
+
+ /**
+ * Attempt to force override of native video tracks.
+ *
+ * @param {boolean} override - If set to true native video will be overridden,
+ * otherwise native video will potentially be used.
+ *
+ * @abstract
+ */
+ overrideNativeVideoTracks(override) {}
+
+ /**
+ * Check if the tech can support the given mime-type.
+ *
+ * The base tech does not support any type, but source handlers might
+ * overwrite this.
+ *
+ * @param {string} _type
+ * The mimetype to check for support
+ *
+ * @return {string}
+ * 'probably', 'maybe', or empty string
+ *
+ * @see [Spec]{@link https://developer.mozilla.org/en-US/docs/Web/API/HTMLMediaElement/canPlayType}
+ *
+ * @abstract
+ */
+ canPlayType(_type) {
+ return '';
+ }
+
+ /**
+ * Check if the type is supported by this tech.
+ *
+ * The base tech does not support any type, but source handlers might
+ * overwrite this.
+ *
+ * @param {string} _type
+ * The media type to check
+ * @return {string} Returns the native video element's response
+ */
+ static canPlayType(_type) {
+ return '';
+ }
+
+ /**
+ * Check if the tech can support the given source
+ *
+ * @param {Object} srcObj
+ * The source object
+ * @param {Object} options
+ * The options passed to the tech
+ * @return {string} 'probably', 'maybe', or '' (empty string)
+ */
+ static canPlaySource(srcObj, options) {
+ return Tech.canPlayType(srcObj.type);
+ }
+
+ /*
+ * Return whether the argument is a Tech or not.
+ * Can be passed either a Class like `Html5` or a instance like `player.tech_`
+ *
+ * @param {Object} component
+ * The item to check
+ *
+ * @return {boolean}
+ * Whether it is a tech or not
+ * - True if it is a tech
+ * - False if it is not
+ */
+ static isTech(component) {
+ return component.prototype instanceof Tech || component instanceof Tech || component === Tech;
+ }
+
+ /**
+ * Registers a `Tech` into a shared list for videojs.
+ *
+ * @param {string} name
+ * Name of the `Tech` to register.
+ *
+ * @param {Object} tech
+ * The `Tech` class to register.
+ */
+ static registerTech(name, tech) {
+ if (!Tech.techs_) {
+ Tech.techs_ = {};
+ }
+ if (!Tech.isTech(tech)) {
+ throw new Error(`Tech ${name} must be a Tech`);
+ }
+ if (!Tech.canPlayType) {
+ throw new Error('Techs must have a static canPlayType method on them');
+ }
+ if (!Tech.canPlaySource) {
+ throw new Error('Techs must have a static canPlaySource method on them');
+ }
+ name = toTitleCase$1(name);
+ Tech.techs_[name] = tech;
+ Tech.techs_[toLowerCase(name)] = tech;
+ if (name !== 'Tech') {
+ // camel case the techName for use in techOrder
+ Tech.defaultTechOrder_.push(name);
+ }
+ return tech;
+ }
+
+ /**
+ * Get a `Tech` from the shared list by name.
+ *
+ * @param {string} name
+ * `camelCase` or `TitleCase` name of the Tech to get
+ *
+ * @return {Tech|undefined}
+ * The `Tech` or undefined if there was no tech with the name requested.
+ */
+ static getTech(name) {
+ if (!name) {
+ return;
+ }
+ if (Tech.techs_ && Tech.techs_[name]) {
+ return Tech.techs_[name];
+ }
+ name = toTitleCase$1(name);
+ if (window && window.videojs && window.videojs[name]) {
+ log$1.warn(`The ${name} tech was added to the videojs object when it should be registered using videojs.registerTech(name, tech)`);
+ return window.videojs[name];
+ }
+ }
+ }
+
+ /**
+ * Get the {@link VideoTrackList}
+ *
+ * @returns {VideoTrackList}
+ * @method Tech.prototype.videoTracks
+ */
+
+ /**
+ * Get the {@link AudioTrackList}
+ *
+ * @returns {AudioTrackList}
+ * @method Tech.prototype.audioTracks
+ */
+
+ /**
+ * Get the {@link TextTrackList}
+ *
+ * @returns {TextTrackList}
+ * @method Tech.prototype.textTracks
+ */
+
+ /**
+ * Get the remote element {@link TextTrackList}
+ *
+ * @returns {TextTrackList}
+ * @method Tech.prototype.remoteTextTracks
+ */
+
+ /**
+ * Get the remote element {@link HtmlTrackElementList}
+ *
+ * @returns {HtmlTrackElementList}
+ * @method Tech.prototype.remoteTextTrackEls
+ */
+
+ ALL.names.forEach(function (name) {
+ const props = ALL[name];
+ Tech.prototype[props.getterName] = function () {
+ this[props.privateName] = this[props.privateName] || new props.ListClass();
+ return this[props.privateName];
+ };
+ });
+
+ /**
+ * List of associated text tracks
+ *
+ * @type {TextTrackList}
+ * @private
+ * @property Tech#textTracks_
+ */
+
+ /**
+ * List of associated audio tracks.
+ *
+ * @type {AudioTrackList}
+ * @private
+ * @property Tech#audioTracks_
+ */
+
+ /**
+ * List of associated video tracks.
+ *
+ * @type {VideoTrackList}
+ * @private
+ * @property Tech#videoTracks_
+ */
+
+ /**
+ * Boolean indicating whether the `Tech` supports volume control.
+ *
+ * @type {boolean}
+ * @default
+ */
+ Tech.prototype.featuresVolumeControl = true;
+
+ /**
+ * Boolean indicating whether the `Tech` supports muting volume.
+ *
+ * @type {boolean}
+ * @default
+ */
+ Tech.prototype.featuresMuteControl = true;
+
+ /**
+ * Boolean indicating whether the `Tech` supports fullscreen resize control.
+ * Resizing plugins using request fullscreen reloads the plugin
+ *
+ * @type {boolean}
+ * @default
+ */
+ Tech.prototype.featuresFullscreenResize = false;
+
+ /**
+ * Boolean indicating whether the `Tech` supports changing the speed at which the video
+ * plays. Examples:
+ * - Set player to play 2x (twice) as fast
+ * - Set player to play 0.5x (half) as fast
+ *
+ * @type {boolean}
+ * @default
+ */
+ Tech.prototype.featuresPlaybackRate = false;
+
+ /**
+ * Boolean indicating whether the `Tech` supports the `progress` event.
+ * This will be used to determine if {@link Tech#manualProgressOn} should be called.
+ *
+ * @type {boolean}
+ * @default
+ */
+ Tech.prototype.featuresProgressEvents = false;
+
+ /**
+ * Boolean indicating whether the `Tech` supports the `sourceset` event.
+ *
+ * A tech should set this to `true` and then use {@link Tech#triggerSourceset}
+ * to trigger a {@link Tech#event:sourceset} at the earliest time after getting
+ * a new source.
+ *
+ * @type {boolean}
+ * @default
+ */
+ Tech.prototype.featuresSourceset = false;
+
+ /**
+ * Boolean indicating whether the `Tech` supports the `timeupdate` event.
+ * This will be used to determine if {@link Tech#manualTimeUpdates} should be called.
+ *
+ * @type {boolean}
+ * @default
+ */
+ Tech.prototype.featuresTimeupdateEvents = false;
+
+ /**
+ * Boolean indicating whether the `Tech` supports the native `TextTrack`s.
+ * This will help us integrate with native `TextTrack`s if the browser supports them.
+ *
+ * @type {boolean}
+ * @default
+ */
+ Tech.prototype.featuresNativeTextTracks = false;
+
+ /**
+ * Boolean indicating whether the `Tech` supports `requestVideoFrameCallback`.
+ *
+ * @type {boolean}
+ * @default
+ */
+ Tech.prototype.featuresVideoFrameCallback = false;
+
+ /**
+ * A functional mixin for techs that want to use the Source Handler pattern.
+ * Source handlers are scripts for handling specific formats.
+ * The source handler pattern is used for adaptive formats (HLS, DASH) that
+ * manually load video data and feed it into a Source Buffer (Media Source Extensions)
+ * Example: `Tech.withSourceHandlers.call(MyTech);`
+ *
+ * @param {Tech} _Tech
+ * The tech to add source handler functions to.
+ *
+ * @mixes Tech~SourceHandlerAdditions
+ */
+ Tech.withSourceHandlers = function (_Tech) {
+ /**
+ * Register a source handler
+ *
+ * @param {Function} handler
+ * The source handler class
+ *
+ * @param {number} [index]
+ * Register it at the following index
+ */
+ _Tech.registerSourceHandler = function (handler, index) {
+ let handlers = _Tech.sourceHandlers;
+ if (!handlers) {
+ handlers = _Tech.sourceHandlers = [];
+ }
+ if (index === undefined) {
+ // add to the end of the list
+ index = handlers.length;
+ }
+ handlers.splice(index, 0, handler);
+ };
+
+ /**
+ * Check if the tech can support the given type. Also checks the
+ * Techs sourceHandlers.
+ *
+ * @param {string} type
+ * The mimetype to check.
+ *
+ * @return {string}
+ * 'probably', 'maybe', or '' (empty string)
+ */
+ _Tech.canPlayType = function (type) {
+ const handlers = _Tech.sourceHandlers || [];
+ let can;
+ for (let i = 0; i < handlers.length; i++) {
+ can = handlers[i].canPlayType(type);
+ if (can) {
+ return can;
+ }
+ }
+ return '';
+ };
+
+ /**
+ * Returns the first source handler that supports the source.
+ *
+ * TODO: Answer question: should 'probably' be prioritized over 'maybe'
+ *
+ * @param {SourceObject} source
+ * The source object
+ *
+ * @param {Object} options
+ * The options passed to the tech
+ *
+ * @return {SourceHandler|null}
+ * The first source handler that supports the source or null if
+ * no SourceHandler supports the source
+ */
+ _Tech.selectSourceHandler = function (source, options) {
+ const handlers = _Tech.sourceHandlers || [];
+ let can;
+ for (let i = 0; i < handlers.length; i++) {
+ can = handlers[i].canHandleSource(source, options);
+ if (can) {
+ return handlers[i];
+ }
+ }
+ return null;
+ };
+
+ /**
+ * Check if the tech can support the given source.
+ *
+ * @param {SourceObject} srcObj
+ * The source object
+ *
+ * @param {Object} options
+ * The options passed to the tech
+ *
+ * @return {string}
+ * 'probably', 'maybe', or '' (empty string)
+ */
+ _Tech.canPlaySource = function (srcObj, options) {
+ const sh = _Tech.selectSourceHandler(srcObj, options);
+ if (sh) {
+ return sh.canHandleSource(srcObj, options);
+ }
+ return '';
+ };
+
+ /**
+ * When using a source handler, prefer its implementation of
+ * any function normally provided by the tech.
+ */
+ const deferrable = ['seekable', 'seeking', 'duration'];
+
+ /**
+ * A wrapper around {@link Tech#seekable} that will call a `SourceHandler`s seekable
+ * function if it exists, with a fallback to the Techs seekable function.
+ *
+ * @method _Tech.seekable
+ */
+
+ /**
+ * A wrapper around {@link Tech#duration} that will call a `SourceHandler`s duration
+ * function if it exists, otherwise it will fallback to the techs duration function.
+ *
+ * @method _Tech.duration
+ */
+
+ deferrable.forEach(function (fnName) {
+ const originalFn = this[fnName];
+ if (typeof originalFn !== 'function') {
+ return;
+ }
+ this[fnName] = function () {
+ if (this.sourceHandler_ && this.sourceHandler_[fnName]) {
+ return this.sourceHandler_[fnName].apply(this.sourceHandler_, arguments);
+ }
+ return originalFn.apply(this, arguments);
+ };
+ }, _Tech.prototype);
+
+ /**
+ * Create a function for setting the source using a source object
+ * and source handlers.
+ * Should never be called unless a source handler was found.
+ *
+ * @param {SourceObject} source
+ * A source object with src and type keys
+ */
+ _Tech.prototype.setSource = function (source) {
+ let sh = _Tech.selectSourceHandler(source, this.options_);
+ if (!sh) {
+ // Fall back to a native source handler when unsupported sources are
+ // deliberately set
+ if (_Tech.nativeSourceHandler) {
+ sh = _Tech.nativeSourceHandler;
+ } else {
+ log$1.error('No source handler found for the current source.');
+ }
+ }
+
+ // Dispose any existing source handler
+ this.disposeSourceHandler();
+ this.off('dispose', this.disposeSourceHandler_);
+ if (sh !== _Tech.nativeSourceHandler) {
+ this.currentSource_ = source;
+ }
+ this.sourceHandler_ = sh.handleSource(source, this, this.options_);
+ this.one('dispose', this.disposeSourceHandler_);
+ };
+
+ /**
+ * Clean up any existing SourceHandlers and listeners when the Tech is disposed.
+ *
+ * @listens Tech#dispose
+ */
+ _Tech.prototype.disposeSourceHandler = function () {
+ // if we have a source and get another one
+ // then we are loading something new
+ // than clear all of our current tracks
+ if (this.currentSource_) {
+ this.clearTracks(['audio', 'video']);
+ this.currentSource_ = null;
+ }
+
+ // always clean up auto-text tracks
+ this.cleanupAutoTextTracks();
+ if (this.sourceHandler_) {
+ if (this.sourceHandler_.dispose) {
+ this.sourceHandler_.dispose();
+ }
+ this.sourceHandler_ = null;
+ }
+ };
+ };
+
+ // The base Tech class needs to be registered as a Component. It is the only
+ // Tech that can be registered as a Component.
+ Component$1.registerComponent('Tech', Tech);
+ Tech.registerTech('Tech', Tech);
+
+ /**
+ * A list of techs that should be added to techOrder on Players
+ *
+ * @private
+ */
+ Tech.defaultTechOrder_ = [];
+
+ /**
+ * @file middleware.js
+ * @module middleware
+ */
+ const middlewares = {};
+ const middlewareInstances = {};
+ const TERMINATOR = {};
+
+ /**
+ * A middleware object is a plain JavaScript object that has methods that
+ * match the {@link Tech} methods found in the lists of allowed
+ * {@link module:middleware.allowedGetters|getters},
+ * {@link module:middleware.allowedSetters|setters}, and
+ * {@link module:middleware.allowedMediators|mediators}.
+ *
+ * @typedef {Object} MiddlewareObject
+ */
+
+ /**
+ * A middleware factory function that should return a
+ * {@link module:middleware~MiddlewareObject|MiddlewareObject}.
+ *
+ * This factory will be called for each player when needed, with the player
+ * passed in as an argument.
+ *
+ * @callback MiddlewareFactory
+ * @param { import('../player').default } player
+ * A Video.js player.
+ */
+
+ /**
+ * Define a middleware that the player should use by way of a factory function
+ * that returns a middleware object.
+ *
+ * @param {string} type
+ * The MIME type to match or `"*"` for all MIME types.
+ *
+ * @param {MiddlewareFactory} middleware
+ * A middleware factory function that will be executed for
+ * matching types.
+ */
+ function use(type, middleware) {
+ middlewares[type] = middlewares[type] || [];
+ middlewares[type].push(middleware);
+ }
+
+ /**
+ * Asynchronously sets a source using middleware by recursing through any
+ * matching middlewares and calling `setSource` on each, passing along the
+ * previous returned value each time.
+ *
+ * @param { import('../player').default } player
+ * A {@link Player} instance.
+ *
+ * @param {Tech~SourceObject} src
+ * A source object.
+ *
+ * @param {Function}
+ * The next middleware to run.
+ */
+ function setSource(player, src, next) {
+ player.setTimeout(() => setSourceHelper(src, middlewares[src.type], next, player), 1);
+ }
+
+ /**
+ * When the tech is set, passes the tech to each middleware's `setTech` method.
+ *
+ * @param {Object[]} middleware
+ * An array of middleware instances.
+ *
+ * @param { import('../tech/tech').default } tech
+ * A Video.js tech.
+ */
+ function setTech(middleware, tech) {
+ middleware.forEach(mw => mw.setTech && mw.setTech(tech));
+ }
+
+ /**
+ * Calls a getter on the tech first, through each middleware
+ * from right to left to the player.
+ *
+ * @param {Object[]} middleware
+ * An array of middleware instances.
+ *
+ * @param { import('../tech/tech').default } tech
+ * The current tech.
+ *
+ * @param {string} method
+ * A method name.
+ *
+ * @return {*}
+ * The final value from the tech after middleware has intercepted it.
+ */
+ function get(middleware, tech, method) {
+ return middleware.reduceRight(middlewareIterator(method), tech[method]());
+ }
+
+ /**
+ * Takes the argument given to the player and calls the setter method on each
+ * middleware from left to right to the tech.
+ *
+ * @param {Object[]} middleware
+ * An array of middleware instances.
+ *
+ * @param { import('../tech/tech').default } tech
+ * The current tech.
+ *
+ * @param {string} method
+ * A method name.
+ *
+ * @param {*} arg
+ * The value to set on the tech.
+ *
+ * @return {*}
+ * The return value of the `method` of the `tech`.
+ */
+ function set(middleware, tech, method, arg) {
+ return tech[method](middleware.reduce(middlewareIterator(method), arg));
+ }
+
+ /**
+ * Takes the argument given to the player and calls the `call` version of the
+ * method on each middleware from left to right.
+ *
+ * Then, call the passed in method on the tech and return the result unchanged
+ * back to the player, through middleware, this time from right to left.
+ *
+ * @param {Object[]} middleware
+ * An array of middleware instances.
+ *
+ * @param { import('../tech/tech').default } tech
+ * The current tech.
+ *
+ * @param {string} method
+ * A method name.
+ *
+ * @param {*} arg
+ * The value to set on the tech.
+ *
+ * @return {*}
+ * The return value of the `method` of the `tech`, regardless of the
+ * return values of middlewares.
+ */
+ function mediate(middleware, tech, method, arg = null) {
+ const callMethod = 'call' + toTitleCase$1(method);
+ const middlewareValue = middleware.reduce(middlewareIterator(callMethod), arg);
+ const terminated = middlewareValue === TERMINATOR;
+ // deprecated. The `null` return value should instead return TERMINATOR to
+ // prevent confusion if a techs method actually returns null.
+ const returnValue = terminated ? null : tech[method](middlewareValue);
+ executeRight(middleware, method, returnValue, terminated);
+ return returnValue;
+ }
+
+ /**
+ * Enumeration of allowed getters where the keys are method names.
+ *
+ * @type {Object}
+ */
+ const allowedGetters = {
+ buffered: 1,
+ currentTime: 1,
+ duration: 1,
+ muted: 1,
+ played: 1,
+ paused: 1,
+ seekable: 1,
+ volume: 1,
+ ended: 1
+ };
+
+ /**
+ * Enumeration of allowed setters where the keys are method names.
+ *
+ * @type {Object}
+ */
+ const allowedSetters = {
+ setCurrentTime: 1,
+ setMuted: 1,
+ setVolume: 1
+ };
+
+ /**
+ * Enumeration of allowed mediators where the keys are method names.
+ *
+ * @type {Object}
+ */
+ const allowedMediators = {
+ play: 1,
+ pause: 1
+ };
+ function middlewareIterator(method) {
+ return (value, mw) => {
+ // if the previous middleware terminated, pass along the termination
+ if (value === TERMINATOR) {
+ return TERMINATOR;
+ }
+ if (mw[method]) {
+ return mw[method](value);
+ }
+ return value;
+ };
+ }
+ function executeRight(mws, method, value, terminated) {
+ for (let i = mws.length - 1; i >= 0; i--) {
+ const mw = mws[i];
+ if (mw[method]) {
+ mw[method](terminated, value);
+ }
+ }
+ }
+
+ /**
+ * Clear the middleware cache for a player.
+ *
+ * @param { import('../player').default } player
+ * A {@link Player} instance.
+ */
+ function clearCacheForPlayer(player) {
+ middlewareInstances[player.id()] = null;
+ }
+
+ /**
+ * {
+ * [playerId]: [[mwFactory, mwInstance], ...]
+ * }
+ *
+ * @private
+ */
+ function getOrCreateFactory(player, mwFactory) {
+ const mws = middlewareInstances[player.id()];
+ let mw = null;
+ if (mws === undefined || mws === null) {
+ mw = mwFactory(player);
+ middlewareInstances[player.id()] = [[mwFactory, mw]];
+ return mw;
+ }
+ for (let i = 0; i < mws.length; i++) {
+ const [mwf, mwi] = mws[i];
+ if (mwf !== mwFactory) {
+ continue;
+ }
+ mw = mwi;
+ }
+ if (mw === null) {
+ mw = mwFactory(player);
+ mws.push([mwFactory, mw]);
+ }
+ return mw;
+ }
+ function setSourceHelper(src = {}, middleware = [], next, player, acc = [], lastRun = false) {
+ const [mwFactory, ...mwrest] = middleware;
+
+ // if mwFactory is a string, then we're at a fork in the road
+ if (typeof mwFactory === 'string') {
+ setSourceHelper(src, middlewares[mwFactory], next, player, acc, lastRun);
+
+ // if we have an mwFactory, call it with the player to get the mw,
+ // then call the mw's setSource method
+ } else if (mwFactory) {
+ const mw = getOrCreateFactory(player, mwFactory);
+
+ // if setSource isn't present, implicitly select this middleware
+ if (!mw.setSource) {
+ acc.push(mw);
+ return setSourceHelper(src, mwrest, next, player, acc, lastRun);
+ }
+ mw.setSource(Object.assign({}, src), function (err, _src) {
+ // something happened, try the next middleware on the current level
+ // make sure to use the old src
+ if (err) {
+ return setSourceHelper(src, mwrest, next, player, acc, lastRun);
+ }
+
+ // we've succeeded, now we need to go deeper
+ acc.push(mw);
+
+ // if it's the same type, continue down the current chain
+ // otherwise, we want to go down the new chain
+ setSourceHelper(_src, src.type === _src.type ? mwrest : middlewares[_src.type], next, player, acc, lastRun);
+ });
+ } else if (mwrest.length) {
+ setSourceHelper(src, mwrest, next, player, acc, lastRun);
+ } else if (lastRun) {
+ next(src, acc);
+ } else {
+ setSourceHelper(src, middlewares['*'], next, player, acc, true);
+ }
+ }
+
+ /**
+ * Mimetypes
+ *
+ * @see https://www.iana.org/assignments/media-types/media-types.xhtml
+ * @typedef Mimetypes~Kind
+ * @enum
+ */
+ const MimetypesKind = {
+ opus: 'video/ogg',
+ ogv: 'video/ogg',
+ mp4: 'video/mp4',
+ mov: 'video/mp4',
+ m4v: 'video/mp4',
+ mkv: 'video/x-matroska',
+ m4a: 'audio/mp4',
+ mp3: 'audio/mpeg',
+ aac: 'audio/aac',
+ caf: 'audio/x-caf',
+ flac: 'audio/flac',
+ oga: 'audio/ogg',
+ wav: 'audio/wav',
+ m3u8: 'application/x-mpegURL',
+ mpd: 'application/dash+xml',
+ jpg: 'image/jpeg',
+ jpeg: 'image/jpeg',
+ gif: 'image/gif',
+ png: 'image/png',
+ svg: 'image/svg+xml',
+ webp: 'image/webp'
+ };
+
+ /**
+ * Get the mimetype of a given src url if possible
+ *
+ * @param {string} src
+ * The url to the src
+ *
+ * @return {string}
+ * return the mimetype if it was known or empty string otherwise
+ */
+ const getMimetype = function (src = '') {
+ const ext = getFileExtension(src);
+ const mimetype = MimetypesKind[ext.toLowerCase()];
+ return mimetype || '';
+ };
+
+ /**
+ * Find the mime type of a given source string if possible. Uses the player
+ * source cache.
+ *
+ * @param { import('../player').default } player
+ * The player object
+ *
+ * @param {string} src
+ * The source string
+ *
+ * @return {string}
+ * The type that was found
+ */
+ const findMimetype = (player, src) => {
+ if (!src) {
+ return '';
+ }
+
+ // 1. check for the type in the `source` cache
+ if (player.cache_.source.src === src && player.cache_.source.type) {
+ return player.cache_.source.type;
+ }
+
+ // 2. see if we have this source in our `currentSources` cache
+ const matchingSources = player.cache_.sources.filter(s => s.src === src);
+ if (matchingSources.length) {
+ return matchingSources[0].type;
+ }
+
+ // 3. look for the src url in source elements and use the type there
+ const sources = player.$$('source');
+ for (let i = 0; i < sources.length; i++) {
+ const s = sources[i];
+ if (s.type && s.src && s.src === src) {
+ return s.type;
+ }
+ }
+
+ // 4. finally fallback to our list of mime types based on src url extension
+ return getMimetype(src);
+ };
+
+ /**
+ * @module filter-source
+ */
+
+ /**
+ * Filter out single bad source objects or multiple source objects in an
+ * array. Also flattens nested source object arrays into a 1 dimensional
+ * array of source objects.
+ *
+ * @param {Tech~SourceObject|Tech~SourceObject[]} src
+ * The src object to filter
+ *
+ * @return {Tech~SourceObject[]}
+ * An array of sourceobjects containing only valid sources
+ *
+ * @private
+ */
+ const filterSource = function (src) {
+ // traverse array
+ if (Array.isArray(src)) {
+ let newsrc = [];
+ src.forEach(function (srcobj) {
+ srcobj = filterSource(srcobj);
+ if (Array.isArray(srcobj)) {
+ newsrc = newsrc.concat(srcobj);
+ } else if (isObject$1(srcobj)) {
+ newsrc.push(srcobj);
+ }
+ });
+ src = newsrc;
+ } else if (typeof src === 'string' && src.trim()) {
+ // convert string into object
+ src = [fixSource({
+ src
+ })];
+ } else if (isObject$1(src) && typeof src.src === 'string' && src.src && src.src.trim()) {
+ // src is already valid
+ src = [fixSource(src)];
+ } else {
+ // invalid source, turn it into an empty array
+ src = [];
+ }
+ return src;
+ };
+
+ /**
+ * Checks src mimetype, adding it when possible
+ *
+ * @param {Tech~SourceObject} src
+ * The src object to check
+ * @return {Tech~SourceObject}
+ * src Object with known type
+ */
+ function fixSource(src) {
+ if (!src.type) {
+ const mimetype = getMimetype(src.src);
+ if (mimetype) {
+ src.type = mimetype;
+ }
+ }
+ return src;
+ }
+
+ var icons = "<svg xmlns=\"http://www.w3.org/2000/svg\">\n <defs>\n <symbol viewBox=\"0 0 48 48\" id=\"vjs-icon-play\">\n <path d=\"M16 10v28l22-14z\"></path>\n </symbol>\n <symbol viewBox=\"0 0 48 48\" id=\"vjs-icon-pause\">\n <path d=\"M12 38h8V10h-8v28zm16-28v28h8V10h-8z\"></path>\n </symbol>\n <symbol viewBox=\"0 0 48 48\" id=\"vjs-icon-audio\">\n <path d=\"M24 2C14.06 2 6 10.06 6 20v14c0 3.31 2.69 6 6 6h6V24h-8v-4c0-7.73 6.27-14 14-14s14 6.27 14 14v4h-8v16h6c3.31 0 6-2.69 6-6V20c0-9.94-8.06-18-18-18z\"></path>\n </symbol>\n <symbol viewBox=\"0 0 48 48\" id=\"vjs-icon-captions\">\n <path d=\"M38 8H10c-2.21 0-4 1.79-4 4v24c0 2.21 1.79 4 4 4h28c2.21 0 4-1.79 4-4V12c0-2.21-1.79-4-4-4zM22 22h-3v-1h-4v6h4v-1h3v2a2 2 0 0 1-2 2h-6a2 2 0 0 1-2-2v-8a2 2 0 0 1 2-2h6a2 2 0 0 1 2 2v2zm14 0h-3v-1h-4v6h4v-1h3v2a2 2 0 0 1-2 2h-6a2 2 0 0 1-2-2v-8a2 2 0 0 1 2-2h6a2 2 0 0 1 2 2v2z\"></path>\n </symbol>\n <symbol viewBox=\"0 0 48 48\" id=\"vjs-icon-subtitles\">\n <path d=\"M40 8H8c-2.21 0-4 1.79-4 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+
+ /**
+ * @file loader.js
+ */
+
+ /**
+ * The `MediaLoader` is the `Component` that decides which playback technology to load
+ * when a player is initialized.
+ *
+ * @extends Component
+ */
+ class MediaLoader extends Component$1 {
+ /**
+ * Create an instance of this class.
+ *
+ * @param { import('../player').default } player
+ * The `Player` that this class should attach to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ *
+ * @param {Function} [ready]
+ * The function that is run when this component is ready.
+ */
+ constructor(player, options, ready) {
+ // MediaLoader has no element
+ const options_ = merge$2({
+ createEl: false
+ }, options);
+ super(player, options_, ready);
+
+ // If there are no sources when the player is initialized,
+ // load the first supported playback technology.
+
+ if (!options.playerOptions.sources || options.playerOptions.sources.length === 0) {
+ for (let i = 0, j = options.playerOptions.techOrder; i < j.length; i++) {
+ const techName = toTitleCase$1(j[i]);
+ let tech = Tech.getTech(techName);
+
+ // Support old behavior of techs being registered as components.
+ // Remove once that deprecated behavior is removed.
+ if (!techName) {
+ tech = Component$1.getComponent(techName);
+ }
+
+ // Check if the browser supports this technology
+ if (tech && tech.isSupported()) {
+ player.loadTech_(techName);
+ break;
+ }
+ }
+ } else {
+ // Loop through playback technologies (e.g. HTML5) and check for support.
+ // Then load the best source.
+ // A few assumptions here:
+ // All playback technologies respect preload false.
+ player.src(options.playerOptions.sources);
+ }
+ }
+ }
+ Component$1.registerComponent('MediaLoader', MediaLoader);
+
+ /**
+ * @file clickable-component.js
+ */
+
+ /**
+ * Component which is clickable or keyboard actionable, but is not a
+ * native HTML button.
+ *
+ * @extends Component
+ */
+ class ClickableComponent extends Component$1 {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('./player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of component options.
+ *
+ * @param {function} [options.clickHandler]
+ * The function to call when the button is clicked / activated
+ *
+ * @param {string} [options.controlText]
+ * The text to set on the button
+ *
+ * @param {string} [options.className]
+ * A class or space separated list of classes to add the component
+ *
+ */
+ constructor(player, options) {
+ super(player, options);
+ if (this.options_.controlText) {
+ this.controlText(this.options_.controlText);
+ }
+ this.handleMouseOver_ = e => this.handleMouseOver(e);
+ this.handleMouseOut_ = e => this.handleMouseOut(e);
+ this.handleClick_ = e => this.handleClick(e);
+ this.handleKeyDown_ = e => this.handleKeyDown(e);
+ this.emitTapEvents();
+ this.enable();
+ }
+
+ /**
+ * Create the `ClickableComponent`s DOM element.
+ *
+ * @param {string} [tag=div]
+ * The element's node type.
+ *
+ * @param {Object} [props={}]
+ * An object of properties that should be set on the element.
+ *
+ * @param {Object} [attributes={}]
+ * An object of attributes that should be set on the element.
+ *
+ * @return {Element}
+ * The element that gets created.
+ */
+ createEl(tag = 'div', props = {}, attributes = {}) {
+ props = Object.assign({
+ className: this.buildCSSClass(),
+ tabIndex: 0
+ }, props);
+ if (tag === 'button') {
+ log$1.error(`Creating a ClickableComponent with an HTML element of ${tag} is not supported; use a Button instead.`);
+ }
+
+ // Add ARIA attributes for clickable element which is not a native HTML button
+ attributes = Object.assign({
+ role: 'button'
+ }, attributes);
+ this.tabIndex_ = props.tabIndex;
+ const el = createEl(tag, props, attributes);
+ if (!this.player_.options_.experimentalSvgIcons) {
+ el.appendChild(createEl('span', {
+ className: 'vjs-icon-placeholder'
+ }, {
+ 'aria-hidden': true
+ }));
+ }
+ this.createControlTextEl(el);
+ return el;
+ }
+ dispose() {
+ // remove controlTextEl_ on dispose
+ this.controlTextEl_ = null;
+ super.dispose();
+ }
+
+ /**
+ * Create a control text element on this `ClickableComponent`
+ *
+ * @param {Element} [el]
+ * Parent element for the control text.
+ *
+ * @return {Element}
+ * The control text element that gets created.
+ */
+ createControlTextEl(el) {
+ this.controlTextEl_ = createEl('span', {
+ className: 'vjs-control-text'
+ }, {
+ // let the screen reader user know that the text of the element may change
+ 'aria-live': 'polite'
+ });
+ if (el) {
+ el.appendChild(this.controlTextEl_);
+ }
+ this.controlText(this.controlText_, el);
+ return this.controlTextEl_;
+ }
+
+ /**
+ * Get or set the localize text to use for the controls on the `ClickableComponent`.
+ *
+ * @param {string} [text]
+ * Control text for element.
+ *
+ * @param {Element} [el=this.el()]
+ * Element to set the title on.
+ *
+ * @return {string}
+ * - The control text when getting
+ */
+ controlText(text, el = this.el()) {
+ if (text === undefined) {
+ return this.controlText_ || 'Need Text';
+ }
+ const localizedText = this.localize(text);
+
+ /** @protected */
+ this.controlText_ = text;
+ textContent(this.controlTextEl_, localizedText);
+ if (!this.nonIconControl && !this.player_.options_.noUITitleAttributes) {
+ // Set title attribute if only an icon is shown
+ el.setAttribute('title', localizedText);
+ }
+ }
+
+ /**
+ * Builds the default DOM `className`.
+ *
+ * @return {string}
+ * The DOM `className` for this object.
+ */
+ buildCSSClass() {
+ return `vjs-control vjs-button ${super.buildCSSClass()}`;
+ }
+
+ /**
+ * Enable this `ClickableComponent`
+ */
+ enable() {
+ if (!this.enabled_) {
+ this.enabled_ = true;
+ this.removeClass('vjs-disabled');
+ this.el_.setAttribute('aria-disabled', 'false');
+ if (typeof this.tabIndex_ !== 'undefined') {
+ this.el_.setAttribute('tabIndex', this.tabIndex_);
+ }
+ this.on(['tap', 'click'], this.handleClick_);
+ this.on('keydown', this.handleKeyDown_);
+ }
+ }
+
+ /**
+ * Disable this `ClickableComponent`
+ */
+ disable() {
+ this.enabled_ = false;
+ this.addClass('vjs-disabled');
+ this.el_.setAttribute('aria-disabled', 'true');
+ if (typeof this.tabIndex_ !== 'undefined') {
+ this.el_.removeAttribute('tabIndex');
+ }
+ this.off('mouseover', this.handleMouseOver_);
+ this.off('mouseout', this.handleMouseOut_);
+ this.off(['tap', 'click'], this.handleClick_);
+ this.off('keydown', this.handleKeyDown_);
+ }
+
+ /**
+ * Handles language change in ClickableComponent for the player in components
+ *
+ *
+ */
+ handleLanguagechange() {
+ this.controlText(this.controlText_);
+ }
+
+ /**
+ * Event handler that is called when a `ClickableComponent` receives a
+ * `click` or `tap` event.
+ *
+ * @param {Event} event
+ * The `tap` or `click` event that caused this function to be called.
+ *
+ * @listens tap
+ * @listens click
+ * @abstract
+ */
+ handleClick(event) {
+ if (this.options_.clickHandler) {
+ this.options_.clickHandler.call(this, arguments);
+ }
+ }
+
+ /**
+ * Event handler that is called when a `ClickableComponent` receives a
+ * `keydown` event.
+ *
+ * By default, if the key is Space or Enter, it will trigger a `click` event.
+ *
+ * @param {KeyboardEvent} event
+ * The `keydown` event that caused this function to be called.
+ *
+ * @listens keydown
+ */
+ handleKeyDown(event) {
+ // Support Space or Enter key operation to fire a click event. Also,
+ // prevent the event from propagating through the DOM and triggering
+ // Player hotkeys.
+ if (keycode.isEventKey(event, 'Space') || keycode.isEventKey(event, 'Enter')) {
+ event.preventDefault();
+ event.stopPropagation();
+ this.trigger('click');
+ } else {
+ // Pass keypress handling up for unsupported keys
+ super.handleKeyDown(event);
+ }
+ }
+ }
+ Component$1.registerComponent('ClickableComponent', ClickableComponent);
+
+ /**
+ * @file poster-image.js
+ */
+
+ /**
+ * A `ClickableComponent` that handles showing the poster image for the player.
+ *
+ * @extends ClickableComponent
+ */
+ class PosterImage extends ClickableComponent {
+ /**
+ * Create an instance of this class.
+ *
+ * @param { import('./player').default } player
+ * The `Player` that this class should attach to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ */
+ constructor(player, options) {
+ super(player, options);
+ this.update();
+ this.update_ = e => this.update(e);
+ player.on('posterchange', this.update_);
+ }
+
+ /**
+ * Clean up and dispose of the `PosterImage`.
+ */
+ dispose() {
+ this.player().off('posterchange', this.update_);
+ super.dispose();
+ }
+
+ /**
+ * Create the `PosterImage`s DOM element.
+ *
+ * @return {Element}
+ * The element that gets created.
+ */
+ createEl() {
+ // The el is an empty div to keep position in the DOM
+ // A picture and img el will be inserted when a source is set
+ return createEl('div', {
+ className: 'vjs-poster'
+ });
+ }
+
+ /**
+ * Get or set the `PosterImage`'s crossOrigin option.
+ *
+ * @param {string|null} [value]
+ * The value to set the crossOrigin to. If an argument is
+ * given, must be one of `'anonymous'` or `'use-credentials'`, or 'null'.
+ *
+ * @return {string|null}
+ * - The current crossOrigin value of the `Player` when getting.
+ * - undefined when setting
+ */
+ crossOrigin(value) {
+ // `null` can be set to unset a value
+ if (typeof value === 'undefined') {
+ if (this.$('img')) {
+ // If the poster's element exists, give its value
+ return this.$('img').crossOrigin;
+ } else if (this.player_.tech_ && this.player_.tech_.isReady_) {
+ // If not but the tech is ready, query the tech
+ return this.player_.crossOrigin();
+ }
+ // Otherwise check options as the poster is usually set before the state of crossorigin
+ // can be retrieved by the getter
+ return this.player_.options_.crossOrigin || this.player_.options_.crossorigin || null;
+ }
+ if (value !== null && value !== 'anonymous' && value !== 'use-credentials') {
+ this.player_.log.warn(`crossOrigin must be null, "anonymous" or "use-credentials", given "${value}"`);
+ return;
+ }
+ if (this.$('img')) {
+ this.$('img').crossOrigin = value;
+ }
+ return;
+ }
+
+ /**
+ * An {@link EventTarget~EventListener} for {@link Player#posterchange} events.
+ *
+ * @listens Player#posterchange
+ *
+ * @param {Event} [event]
+ * The `Player#posterchange` event that triggered this function.
+ */
+ update(event) {
+ const url = this.player().poster();
+ this.setSrc(url);
+
+ // If there's no poster source we should display:none on this component
+ // so it's not still clickable or right-clickable
+ if (url) {
+ this.show();
+ } else {
+ this.hide();
+ }
+ }
+
+ /**
+ * Set the source of the `PosterImage` depending on the display method. (Re)creates
+ * the inner picture and img elementss when needed.
+ *
+ * @param {string} [url]
+ * The URL to the source for the `PosterImage`. If not specified or falsy,
+ * any source and ant inner picture/img are removed.
+ */
+ setSrc(url) {
+ if (!url) {
+ this.el_.textContent = '';
+ return;
+ }
+ if (!this.$('img')) {
+ this.el_.appendChild(createEl('picture', {
+ className: 'vjs-poster',
+ // Don't want poster to be tabbable.
+ tabIndex: -1
+ }, {}, createEl('img', {
+ loading: 'lazy',
+ crossOrigin: this.crossOrigin()
+ }, {
+ alt: ''
+ })));
+ }
+ this.$('img').src = url;
+ }
+
+ /**
+ * An {@link EventTarget~EventListener} for clicks on the `PosterImage`. See
+ * {@link ClickableComponent#handleClick} for instances where this will be triggered.
+ *
+ * @listens tap
+ * @listens click
+ * @listens keydown
+ *
+ * @param {Event} event
+ + The `click`, `tap` or `keydown` event that caused this function to be called.
+ */
+ handleClick(event) {
+ // We don't want a click to trigger playback when controls are disabled
+ if (!this.player_.controls()) {
+ return;
+ }
+ if (this.player_.tech(true)) {
+ this.player_.tech(true).focus();
+ }
+ if (this.player_.paused()) {
+ silencePromise(this.player_.play());
+ } else {
+ this.player_.pause();
+ }
+ }
+ }
+
+ /**
+ * Get or set the `PosterImage`'s crossorigin option. For the HTML5 player, this
+ * sets the `crossOrigin` property on the `<img>` tag to control the CORS
+ * behavior.
+ *
+ * @param {string|null} [value]
+ * The value to set the `PosterImages`'s crossorigin to. If an argument is
+ * given, must be one of `anonymous` or `use-credentials`.
+ *
+ * @return {string|null|undefined}
+ * - The current crossorigin value of the `Player` when getting.
+ * - undefined when setting
+ */
+ PosterImage.prototype.crossorigin = PosterImage.prototype.crossOrigin;
+ Component$1.registerComponent('PosterImage', PosterImage);
+
+ /**
+ * @file text-track-display.js
+ */
+ const darkGray = '#222';
+ const lightGray = '#ccc';
+ const fontMap = {
+ monospace: 'monospace',
+ sansSerif: 'sans-serif',
+ serif: 'serif',
+ monospaceSansSerif: '"Andale Mono", "Lucida Console", monospace',
+ monospaceSerif: '"Courier New", monospace',
+ proportionalSansSerif: 'sans-serif',
+ proportionalSerif: 'serif',
+ casual: '"Comic Sans MS", Impact, fantasy',
+ script: '"Monotype Corsiva", cursive',
+ smallcaps: '"Andale Mono", "Lucida Console", monospace, sans-serif'
+ };
+
+ /**
+ * Construct an rgba color from a given hex color code.
+ *
+ * @param {number} color
+ * Hex number for color, like #f0e or #f604e2.
+ *
+ * @param {number} opacity
+ * Value for opacity, 0.0 - 1.0.
+ *
+ * @return {string}
+ * The rgba color that was created, like 'rgba(255, 0, 0, 0.3)'.
+ */
+ function constructColor(color, opacity) {
+ let hex;
+ if (color.length === 4) {
+ // color looks like "#f0e"
+ hex = color[1] + color[1] + color[2] + color[2] + color[3] + color[3];
+ } else if (color.length === 7) {
+ // color looks like "#f604e2"
+ hex = color.slice(1);
+ } else {
+ throw new Error('Invalid color code provided, ' + color + '; must be formatted as e.g. #f0e or #f604e2.');
+ }
+ return 'rgba(' + parseInt(hex.slice(0, 2), 16) + ',' + parseInt(hex.slice(2, 4), 16) + ',' + parseInt(hex.slice(4, 6), 16) + ',' + opacity + ')';
+ }
+
+ /**
+ * Try to update the style of a DOM element. Some style changes will throw an error,
+ * particularly in IE8. Those should be noops.
+ *
+ * @param {Element} el
+ * The DOM element to be styled.
+ *
+ * @param {string} style
+ * The CSS property on the element that should be styled.
+ *
+ * @param {string} rule
+ * The style rule that should be applied to the property.
+ *
+ * @private
+ */
+ function tryUpdateStyle(el, style, rule) {
+ try {
+ el.style[style] = rule;
+ } catch (e) {
+ // Satisfies linter.
+ return;
+ }
+ }
+
+ /**
+ * Converts the CSS top/right/bottom/left property numeric value to string in pixels.
+ *
+ * @param {number} position
+ * The CSS top/right/bottom/left property value.
+ *
+ * @return {string}
+ * The CSS property value that was created, like '10px'.
+ *
+ * @private
+ */
+ function getCSSPositionValue(position) {
+ return position ? `${position}px` : '';
+ }
+
+ /**
+ * The component for displaying text track cues.
+ *
+ * @extends Component
+ */
+ class TextTrackDisplay extends Component$1 {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('../player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ *
+ * @param {Function} [ready]
+ * The function to call when `TextTrackDisplay` is ready.
+ */
+ constructor(player, options, ready) {
+ super(player, options, ready);
+ const updateDisplayTextHandler = e => this.updateDisplay(e);
+ const updateDisplayHandler = e => {
+ this.updateDisplayOverlay();
+ this.updateDisplay(e);
+ };
+ player.on('loadstart', e => this.toggleDisplay(e));
+ player.on('texttrackchange', updateDisplayTextHandler);
+ player.on('loadedmetadata', e => {
+ this.updateDisplayOverlay();
+ this.preselectTrack(e);
+ });
+
+ // This used to be called during player init, but was causing an error
+ // if a track should show by default and the display hadn't loaded yet.
+ // Should probably be moved to an external track loader when we support
+ // tracks that don't need a display.
+ player.ready(bind_(this, function () {
+ if (player.tech_ && player.tech_.featuresNativeTextTracks) {
+ this.hide();
+ return;
+ }
+ player.on('fullscreenchange', updateDisplayHandler);
+ player.on('playerresize', updateDisplayHandler);
+ const screenOrientation = window.screen.orientation || window;
+ const changeOrientationEvent = window.screen.orientation ? 'change' : 'orientationchange';
+ screenOrientation.addEventListener(changeOrientationEvent, updateDisplayHandler);
+ player.on('dispose', () => screenOrientation.removeEventListener(changeOrientationEvent, updateDisplayHandler));
+ const tracks = this.options_.playerOptions.tracks || [];
+ for (let i = 0; i < tracks.length; i++) {
+ this.player_.addRemoteTextTrack(tracks[i], true);
+ }
+ this.preselectTrack();
+ }));
+ }
+
+ /**
+ * Preselect a track following this precedence:
+ * - matches the previously selected {@link TextTrack}'s language and kind
+ * - matches the previously selected {@link TextTrack}'s language only
+ * - is the first default captions track
+ * - is the first default descriptions track
+ *
+ * @listens Player#loadstart
+ */
+ preselectTrack() {
+ const modes = {
+ captions: 1,
+ subtitles: 1
+ };
+ const trackList = this.player_.textTracks();
+ const userPref = this.player_.cache_.selectedLanguage;
+ let firstDesc;
+ let firstCaptions;
+ let preferredTrack;
+ for (let i = 0; i < trackList.length; i++) {
+ const track = trackList[i];
+ if (userPref && userPref.enabled && userPref.language && userPref.language === track.language && track.kind in modes) {
+ // Always choose the track that matches both language and kind
+ if (track.kind === userPref.kind) {
+ preferredTrack = track;
+ // or choose the first track that matches language
+ } else if (!preferredTrack) {
+ preferredTrack = track;
+ }
+
+ // clear everything if offTextTrackMenuItem was clicked
+ } else if (userPref && !userPref.enabled) {
+ preferredTrack = null;
+ firstDesc = null;
+ firstCaptions = null;
+ } else if (track.default) {
+ if (track.kind === 'descriptions' && !firstDesc) {
+ firstDesc = track;
+ } else if (track.kind in modes && !firstCaptions) {
+ firstCaptions = track;
+ }
+ }
+ }
+
+ // The preferredTrack matches the user preference and takes
+ // precedence over all the other tracks.
+ // So, display the preferredTrack before the first default track
+ // and the subtitles/captions track before the descriptions track
+ if (preferredTrack) {
+ preferredTrack.mode = 'showing';
+ } else if (firstCaptions) {
+ firstCaptions.mode = 'showing';
+ } else if (firstDesc) {
+ firstDesc.mode = 'showing';
+ }
+ }
+
+ /**
+ * Turn display of {@link TextTrack}'s from the current state into the other state.
+ * There are only two states:
+ * - 'shown'
+ * - 'hidden'
+ *
+ * @listens Player#loadstart
+ */
+ toggleDisplay() {
+ if (this.player_.tech_ && this.player_.tech_.featuresNativeTextTracks) {
+ this.hide();
+ } else {
+ this.show();
+ }
+ }
+
+ /**
+ * Create the {@link Component}'s DOM element.
+ *
+ * @return {Element}
+ * The element that was created.
+ */
+ createEl() {
+ return super.createEl('div', {
+ className: 'vjs-text-track-display'
+ }, {
+ 'translate': 'yes',
+ 'aria-live': 'off',
+ 'aria-atomic': 'true'
+ });
+ }
+
+ /**
+ * Clear all displayed {@link TextTrack}s.
+ */
+ clearDisplay() {
+ if (typeof window.WebVTT === 'function') {
+ window.WebVTT.processCues(window, [], this.el_);
+ }
+ }
+
+ /**
+ * Update the displayed TextTrack when a either a {@link Player#texttrackchange} or
+ * a {@link Player#fullscreenchange} is fired.
+ *
+ * @listens Player#texttrackchange
+ * @listens Player#fullscreenchange
+ */
+ updateDisplay() {
+ const tracks = this.player_.textTracks();
+ const allowMultipleShowingTracks = this.options_.allowMultipleShowingTracks;
+ this.clearDisplay();
+ if (allowMultipleShowingTracks) {
+ const showingTracks = [];
+ for (let i = 0; i < tracks.length; ++i) {
+ const track = tracks[i];
+ if (track.mode !== 'showing') {
+ continue;
+ }
+ showingTracks.push(track);
+ }
+ this.updateForTrack(showingTracks);
+ return;
+ }
+
+ // Track display prioritization model: if multiple tracks are 'showing',
+ // display the first 'subtitles' or 'captions' track which is 'showing',
+ // otherwise display the first 'descriptions' track which is 'showing'
+
+ let descriptionsTrack = null;
+ let captionsSubtitlesTrack = null;
+ let i = tracks.length;
+ while (i--) {
+ const track = tracks[i];
+ if (track.mode === 'showing') {
+ if (track.kind === 'descriptions') {
+ descriptionsTrack = track;
+ } else {
+ captionsSubtitlesTrack = track;
+ }
+ }
+ }
+ if (captionsSubtitlesTrack) {
+ if (this.getAttribute('aria-live') !== 'off') {
+ this.setAttribute('aria-live', 'off');
+ }
+ this.updateForTrack(captionsSubtitlesTrack);
+ } else if (descriptionsTrack) {
+ if (this.getAttribute('aria-live') !== 'assertive') {
+ this.setAttribute('aria-live', 'assertive');
+ }
+ this.updateForTrack(descriptionsTrack);
+ }
+ }
+
+ /**
+ * Updates the displayed TextTrack to be sure it overlays the video when a either
+ * a {@link Player#texttrackchange} or a {@link Player#fullscreenchange} is fired.
+ */
+ updateDisplayOverlay() {
+ // inset-inline and inset-block are not supprted on old chrome, but these are
+ // only likely to be used on TV devices
+ if (!this.player_.videoHeight() || !window.CSS.supports('inset-inline: 10px')) {
+ return;
+ }
+ const playerWidth = this.player_.currentWidth();
+ const playerHeight = this.player_.currentHeight();
+ const playerAspectRatio = playerWidth / playerHeight;
+ const videoAspectRatio = this.player_.videoWidth() / this.player_.videoHeight();
+ let insetInlineMatch = 0;
+ let insetBlockMatch = 0;
+ if (Math.abs(playerAspectRatio - videoAspectRatio) > 0.1) {
+ if (playerAspectRatio > videoAspectRatio) {
+ insetInlineMatch = Math.round((playerWidth - playerHeight * videoAspectRatio) / 2);
+ } else {
+ insetBlockMatch = Math.round((playerHeight - playerWidth / videoAspectRatio) / 2);
+ }
+ }
+ tryUpdateStyle(this.el_, 'insetInline', getCSSPositionValue(insetInlineMatch));
+ tryUpdateStyle(this.el_, 'insetBlock', getCSSPositionValue(insetBlockMatch));
+ }
+
+ /**
+ * Style {@Link TextTrack} activeCues according to {@Link TextTrackSettings}.
+ *
+ * @param {TextTrack} track
+ * Text track object containing active cues to style.
+ */
+ updateDisplayState(track) {
+ const overrides = this.player_.textTrackSettings.getValues();
+ const cues = track.activeCues;
+ let i = cues.length;
+ while (i--) {
+ const cue = cues[i];
+ if (!cue) {
+ continue;
+ }
+ const cueDiv = cue.displayState;
+ if (overrides.color) {
+ cueDiv.firstChild.style.color = overrides.color;
+ }
+ if (overrides.textOpacity) {
+ tryUpdateStyle(cueDiv.firstChild, 'color', constructColor(overrides.color || '#fff', overrides.textOpacity));
+ }
+ if (overrides.backgroundColor) {
+ cueDiv.firstChild.style.backgroundColor = overrides.backgroundColor;
+ }
+ if (overrides.backgroundOpacity) {
+ tryUpdateStyle(cueDiv.firstChild, 'backgroundColor', constructColor(overrides.backgroundColor || '#000', overrides.backgroundOpacity));
+ }
+ if (overrides.windowColor) {
+ if (overrides.windowOpacity) {
+ tryUpdateStyle(cueDiv, 'backgroundColor', constructColor(overrides.windowColor, overrides.windowOpacity));
+ } else {
+ cueDiv.style.backgroundColor = overrides.windowColor;
+ }
+ }
+ if (overrides.edgeStyle) {
+ if (overrides.edgeStyle === 'dropshadow') {
+ cueDiv.firstChild.style.textShadow = `2px 2px 3px ${darkGray}, 2px 2px 4px ${darkGray}, 2px 2px 5px ${darkGray}`;
+ } else if (overrides.edgeStyle === 'raised') {
+ cueDiv.firstChild.style.textShadow = `1px 1px ${darkGray}, 2px 2px ${darkGray}, 3px 3px ${darkGray}`;
+ } else if (overrides.edgeStyle === 'depressed') {
+ cueDiv.firstChild.style.textShadow = `1px 1px ${lightGray}, 0 1px ${lightGray}, -1px -1px ${darkGray}, 0 -1px ${darkGray}`;
+ } else if (overrides.edgeStyle === 'uniform') {
+ cueDiv.firstChild.style.textShadow = `0 0 4px ${darkGray}, 0 0 4px ${darkGray}, 0 0 4px ${darkGray}, 0 0 4px ${darkGray}`;
+ }
+ }
+ if (overrides.fontPercent && overrides.fontPercent !== 1) {
+ const fontSize = window.parseFloat(cueDiv.style.fontSize);
+ cueDiv.style.fontSize = fontSize * overrides.fontPercent + 'px';
+ cueDiv.style.height = 'auto';
+ cueDiv.style.top = 'auto';
+ }
+ if (overrides.fontFamily && overrides.fontFamily !== 'default') {
+ if (overrides.fontFamily === 'small-caps') {
+ cueDiv.firstChild.style.fontVariant = 'small-caps';
+ } else {
+ cueDiv.firstChild.style.fontFamily = fontMap[overrides.fontFamily];
+ }
+ }
+ }
+ }
+
+ /**
+ * Add an {@link TextTrack} to to the {@link Tech}s {@link TextTrackList}.
+ *
+ * @param {TextTrack|TextTrack[]} tracks
+ * Text track object or text track array to be added to the list.
+ */
+ updateForTrack(tracks) {
+ if (!Array.isArray(tracks)) {
+ tracks = [tracks];
+ }
+ if (typeof window.WebVTT !== 'function' || tracks.every(track => {
+ return !track.activeCues;
+ })) {
+ return;
+ }
+ const cues = [];
+
+ // push all active track cues
+ for (let i = 0; i < tracks.length; ++i) {
+ const track = tracks[i];
+ for (let j = 0; j < track.activeCues.length; ++j) {
+ cues.push(track.activeCues[j]);
+ }
+ }
+
+ // removes all cues before it processes new ones
+ window.WebVTT.processCues(window, cues, this.el_);
+
+ // add unique class to each language text track & add settings styling if necessary
+ for (let i = 0; i < tracks.length; ++i) {
+ const track = tracks[i];
+ for (let j = 0; j < track.activeCues.length; ++j) {
+ const cueEl = track.activeCues[j].displayState;
+ addClass(cueEl, 'vjs-text-track-cue', 'vjs-text-track-cue-' + (track.language ? track.language : i));
+ if (track.language) {
+ setAttribute(cueEl, 'lang', track.language);
+ }
+ }
+ if (this.player_.textTrackSettings) {
+ this.updateDisplayState(track);
+ }
+ }
+ }
+ }
+ Component$1.registerComponent('TextTrackDisplay', TextTrackDisplay);
+
+ /**
+ * @file loading-spinner.js
+ */
+
+ /**
+ * A loading spinner for use during waiting/loading events.
+ *
+ * @extends Component
+ */
+ class LoadingSpinner extends Component$1 {
+ /**
+ * Create the `LoadingSpinner`s DOM element.
+ *
+ * @return {Element}
+ * The dom element that gets created.
+ */
+ createEl() {
+ const isAudio = this.player_.isAudio();
+ const playerType = this.localize(isAudio ? 'Audio Player' : 'Video Player');
+ const controlText = createEl('span', {
+ className: 'vjs-control-text',
+ textContent: this.localize('{1} is loading.', [playerType])
+ });
+ const el = super.createEl('div', {
+ className: 'vjs-loading-spinner',
+ dir: 'ltr'
+ });
+ el.appendChild(controlText);
+ return el;
+ }
+
+ /**
+ * Update control text on languagechange
+ */
+ handleLanguagechange() {
+ this.$('.vjs-control-text').textContent = this.localize('{1} is loading.', [this.player_.isAudio() ? 'Audio Player' : 'Video Player']);
+ }
+ }
+ Component$1.registerComponent('LoadingSpinner', LoadingSpinner);
+
+ /**
+ * @file button.js
+ */
+
+ /**
+ * Base class for all buttons.
+ *
+ * @extends ClickableComponent
+ */
+ class Button extends ClickableComponent {
+ /**
+ * Create the `Button`s DOM element.
+ *
+ * @param {string} [tag="button"]
+ * The element's node type. This argument is IGNORED: no matter what
+ * is passed, it will always create a `button` element.
+ *
+ * @param {Object} [props={}]
+ * An object of properties that should be set on the element.
+ *
+ * @param {Object} [attributes={}]
+ * An object of attributes that should be set on the element.
+ *
+ * @return {Element}
+ * The element that gets created.
+ */
+ createEl(tag, props = {}, attributes = {}) {
+ tag = 'button';
+ props = Object.assign({
+ className: this.buildCSSClass()
+ }, props);
+
+ // Add attributes for button element
+ attributes = Object.assign({
+ // Necessary since the default button type is "submit"
+ type: 'button'
+ }, attributes);
+ const el = createEl(tag, props, attributes);
+ if (!this.player_.options_.experimentalSvgIcons) {
+ el.appendChild(createEl('span', {
+ className: 'vjs-icon-placeholder'
+ }, {
+ 'aria-hidden': true
+ }));
+ }
+ this.createControlTextEl(el);
+ return el;
+ }
+
+ /**
+ * Add a child `Component` inside of this `Button`.
+ *
+ * @param {string|Component} child
+ * The name or instance of a child to add.
+ *
+ * @param {Object} [options={}]
+ * The key/value store of options that will get passed to children of
+ * the child.
+ *
+ * @return {Component}
+ * The `Component` that gets added as a child. When using a string the
+ * `Component` will get created by this process.
+ *
+ * @deprecated since version 5
+ */
+ addChild(child, options = {}) {
+ const className = this.constructor.name;
+ log$1.warn(`Adding an actionable (user controllable) child to a Button (${className}) is not supported; use a ClickableComponent instead.`);
+
+ // Avoid the error message generated by ClickableComponent's addChild method
+ return Component$1.prototype.addChild.call(this, child, options);
+ }
+
+ /**
+ * Enable the `Button` element so that it can be activated or clicked. Use this with
+ * {@link Button#disable}.
+ */
+ enable() {
+ super.enable();
+ this.el_.removeAttribute('disabled');
+ }
+
+ /**
+ * Disable the `Button` element so that it cannot be activated or clicked. Use this with
+ * {@link Button#enable}.
+ */
+ disable() {
+ super.disable();
+ this.el_.setAttribute('disabled', 'disabled');
+ }
+
+ /**
+ * This gets called when a `Button` has focus and `keydown` is triggered via a key
+ * press.
+ *
+ * @param {KeyboardEvent} event
+ * The event that caused this function to get called.
+ *
+ * @listens keydown
+ */
+ handleKeyDown(event) {
+ // Ignore Space or Enter key operation, which is handled by the browser for
+ // a button - though not for its super class, ClickableComponent. Also,
+ // prevent the event from propagating through the DOM and triggering Player
+ // hotkeys. We do not preventDefault here because we _want_ the browser to
+ // handle it.
+ if (keycode.isEventKey(event, 'Space') || keycode.isEventKey(event, 'Enter')) {
+ event.stopPropagation();
+ return;
+ }
+
+ // Pass keypress handling up for unsupported keys
+ super.handleKeyDown(event);
+ }
+ }
+ Component$1.registerComponent('Button', Button);
+
+ /**
+ * @file big-play-button.js
+ */
+
+ /**
+ * The initial play button that shows before the video has played. The hiding of the
+ * `BigPlayButton` get done via CSS and `Player` states.
+ *
+ * @extends Button
+ */
+ class BigPlayButton extends Button {
+ constructor(player, options) {
+ super(player, options);
+ this.mouseused_ = false;
+ this.setIcon('play');
+ this.on('mousedown', e => this.handleMouseDown(e));
+ }
+
+ /**
+ * Builds the default DOM `className`.
+ *
+ * @return {string}
+ * The DOM `className` for this object. Always returns 'vjs-big-play-button'.
+ */
+ buildCSSClass() {
+ return 'vjs-big-play-button';
+ }
+
+ /**
+ * This gets called when a `BigPlayButton` "clicked". See {@link ClickableComponent}
+ * for more detailed information on what a click can be.
+ *
+ * @param {KeyboardEvent|MouseEvent|TouchEvent} event
+ * The `keydown`, `tap`, or `click` event that caused this function to be
+ * called.
+ *
+ * @listens tap
+ * @listens click
+ */
+ handleClick(event) {
+ const playPromise = this.player_.play();
+
+ // exit early if clicked via the mouse
+ if (this.mouseused_ && 'clientX' in event && 'clientY' in event) {
+ silencePromise(playPromise);
+ if (this.player_.tech(true)) {
+ this.player_.tech(true).focus();
+ }
+ return;
+ }
+ const cb = this.player_.getChild('controlBar');
+ const playToggle = cb && cb.getChild('playToggle');
+ if (!playToggle) {
+ this.player_.tech(true).focus();
+ return;
+ }
+ const playFocus = () => playToggle.focus();
+ if (isPromise(playPromise)) {
+ playPromise.then(playFocus, () => {});
+ } else {
+ this.setTimeout(playFocus, 1);
+ }
+ }
+
+ /**
+ * Event handler that is called when a `BigPlayButton` receives a
+ * `keydown` event.
+ *
+ * @param {KeyboardEvent} event
+ * The `keydown` event that caused this function to be called.
+ *
+ * @listens keydown
+ */
+ handleKeyDown(event) {
+ this.mouseused_ = false;
+ super.handleKeyDown(event);
+ }
+
+ /**
+ * Handle `mousedown` events on the `BigPlayButton`.
+ *
+ * @param {MouseEvent} event
+ * `mousedown` or `touchstart` event that triggered this function
+ *
+ * @listens mousedown
+ */
+ handleMouseDown(event) {
+ this.mouseused_ = true;
+ }
+ }
+
+ /**
+ * The text that should display over the `BigPlayButton`s controls. Added to for localization.
+ *
+ * @type {string}
+ * @protected
+ */
+ BigPlayButton.prototype.controlText_ = 'Play Video';
+ Component$1.registerComponent('BigPlayButton', BigPlayButton);
+
+ /**
+ * @file close-button.js
+ */
+
+ /**
+ * The `CloseButton` is a `{@link Button}` that fires a `close` event when
+ * it gets clicked.
+ *
+ * @extends Button
+ */
+ class CloseButton extends Button {
+ /**
+ * Creates an instance of the this class.
+ *
+ * @param { import('./player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ */
+ constructor(player, options) {
+ super(player, options);
+ this.setIcon('cancel');
+ this.controlText(options && options.controlText || this.localize('Close'));
+ }
+
+ /**
+ * Builds the default DOM `className`.
+ *
+ * @return {string}
+ * The DOM `className` for this object.
+ */
+ buildCSSClass() {
+ return `vjs-close-button ${super.buildCSSClass()}`;
+ }
+
+ /**
+ * This gets called when a `CloseButton` gets clicked. See
+ * {@link ClickableComponent#handleClick} for more information on when
+ * this will be triggered
+ *
+ * @param {Event} event
+ * The `keydown`, `tap`, or `click` event that caused this function to be
+ * called.
+ *
+ * @listens tap
+ * @listens click
+ * @fires CloseButton#close
+ */
+ handleClick(event) {
+ /**
+ * Triggered when the a `CloseButton` is clicked.
+ *
+ * @event CloseButton#close
+ * @type {Event}
+ *
+ * @property {boolean} [bubbles=false]
+ * set to false so that the close event does not
+ * bubble up to parents if there is no listener
+ */
+ this.trigger({
+ type: 'close',
+ bubbles: false
+ });
+ }
+ /**
+ * Event handler that is called when a `CloseButton` receives a
+ * `keydown` event.
+ *
+ * By default, if the key is Esc, it will trigger a `click` event.
+ *
+ * @param {KeyboardEvent} event
+ * The `keydown` event that caused this function to be called.
+ *
+ * @listens keydown
+ */
+ handleKeyDown(event) {
+ // Esc button will trigger `click` event
+ if (keycode.isEventKey(event, 'Esc')) {
+ event.preventDefault();
+ event.stopPropagation();
+ this.trigger('click');
+ } else {
+ // Pass keypress handling up for unsupported keys
+ super.handleKeyDown(event);
+ }
+ }
+ }
+ Component$1.registerComponent('CloseButton', CloseButton);
+
+ /**
+ * @file play-toggle.js
+ */
+
+ /**
+ * Button to toggle between play and pause.
+ *
+ * @extends Button
+ */
+ class PlayToggle extends Button {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('./player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options={}]
+ * The key/value store of player options.
+ */
+ constructor(player, options = {}) {
+ super(player, options);
+
+ // show or hide replay icon
+ options.replay = options.replay === undefined || options.replay;
+ this.setIcon('play');
+ this.on(player, 'play', e => this.handlePlay(e));
+ this.on(player, 'pause', e => this.handlePause(e));
+ if (options.replay) {
+ this.on(player, 'ended', e => this.handleEnded(e));
+ }
+ }
+
+ /**
+ * Builds the default DOM `className`.
+ *
+ * @return {string}
+ * The DOM `className` for this object.
+ */
+ buildCSSClass() {
+ return `vjs-play-control ${super.buildCSSClass()}`;
+ }
+
+ /**
+ * This gets called when an `PlayToggle` is "clicked". See
+ * {@link ClickableComponent} for more detailed information on what a click can be.
+ *
+ * @param {Event} [event]
+ * The `keydown`, `tap`, or `click` event that caused this function to be
+ * called.
+ *
+ * @listens tap
+ * @listens click
+ */
+ handleClick(event) {
+ if (this.player_.paused()) {
+ silencePromise(this.player_.play());
+ } else {
+ this.player_.pause();
+ }
+ }
+
+ /**
+ * This gets called once after the video has ended and the user seeks so that
+ * we can change the replay button back to a play button.
+ *
+ * @param {Event} [event]
+ * The event that caused this function to run.
+ *
+ * @listens Player#seeked
+ */
+ handleSeeked(event) {
+ this.removeClass('vjs-ended');
+ if (this.player_.paused()) {
+ this.handlePause(event);
+ } else {
+ this.handlePlay(event);
+ }
+ }
+
+ /**
+ * Add the vjs-playing class to the element so it can change appearance.
+ *
+ * @param {Event} [event]
+ * The event that caused this function to run.
+ *
+ * @listens Player#play
+ */
+ handlePlay(event) {
+ this.removeClass('vjs-ended', 'vjs-paused');
+ this.addClass('vjs-playing');
+ // change the button text to "Pause"
+ this.setIcon('pause');
+ this.controlText('Pause');
+ }
+
+ /**
+ * Add the vjs-paused class to the element so it can change appearance.
+ *
+ * @param {Event} [event]
+ * The event that caused this function to run.
+ *
+ * @listens Player#pause
+ */
+ handlePause(event) {
+ this.removeClass('vjs-playing');
+ this.addClass('vjs-paused');
+ // change the button text to "Play"
+ this.setIcon('play');
+ this.controlText('Play');
+ }
+
+ /**
+ * Add the vjs-ended class to the element so it can change appearance
+ *
+ * @param {Event} [event]
+ * The event that caused this function to run.
+ *
+ * @listens Player#ended
+ */
+ handleEnded(event) {
+ this.removeClass('vjs-playing');
+ this.addClass('vjs-ended');
+ // change the button text to "Replay"
+ this.setIcon('replay');
+ this.controlText('Replay');
+
+ // on the next seek remove the replay button
+ this.one(this.player_, 'seeked', e => this.handleSeeked(e));
+ }
+ }
+
+ /**
+ * The text that should display over the `PlayToggle`s controls. Added for localization.
+ *
+ * @type {string}
+ * @protected
+ */
+ PlayToggle.prototype.controlText_ = 'Play';
+ Component$1.registerComponent('PlayToggle', PlayToggle);
+
+ /**
+ * @file time-display.js
+ */
+
+ /**
+ * Displays time information about the video
+ *
+ * @extends Component
+ */
+ class TimeDisplay extends Component$1 {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('../../player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ */
+ constructor(player, options) {
+ super(player, options);
+ this.on(player, ['timeupdate', 'ended', 'seeking'], e => this.update(e));
+ this.updateTextNode_();
+ }
+
+ /**
+ * Create the `Component`'s DOM element
+ *
+ * @return {Element}
+ * The element that was created.
+ */
+ createEl() {
+ const className = this.buildCSSClass();
+ const el = super.createEl('div', {
+ className: `${className} vjs-time-control vjs-control`
+ });
+ const span = createEl('span', {
+ className: 'vjs-control-text',
+ textContent: `${this.localize(this.labelText_)}\u00a0`
+ }, {
+ role: 'presentation'
+ });
+ el.appendChild(span);
+ this.contentEl_ = createEl('span', {
+ className: `${className}-display`
+ }, {
+ // span elements have no implicit role, but some screen readers (notably VoiceOver)
+ // treat them as a break between items in the DOM when using arrow keys
+ // (or left-to-right swipes on iOS) to read contents of a page. Using
+ // role='presentation' causes VoiceOver to NOT treat this span as a break.
+ role: 'presentation'
+ });
+ el.appendChild(this.contentEl_);
+ return el;
+ }
+ dispose() {
+ this.contentEl_ = null;
+ this.textNode_ = null;
+ super.dispose();
+ }
+
+ /**
+ * Updates the displayed time according to the `updateContent` function which is defined in the child class.
+ *
+ * @param {Event} [event]
+ * The `timeupdate`, `ended` or `seeking` (if enableSmoothSeeking is true) event that caused this function to be called.
+ */
+ update(event) {
+ if (!this.player_.options_.enableSmoothSeeking && event.type === 'seeking') {
+ return;
+ }
+ this.updateContent(event);
+ }
+
+ /**
+ * Updates the time display text node with a new time
+ *
+ * @param {number} [time=0] the time to update to
+ *
+ * @private
+ */
+ updateTextNode_(time = 0) {
+ time = formatTime(time);
+ if (this.formattedTime_ === time) {
+ return;
+ }
+ this.formattedTime_ = time;
+ this.requestNamedAnimationFrame('TimeDisplay#updateTextNode_', () => {
+ if (!this.contentEl_) {
+ return;
+ }
+ let oldNode = this.textNode_;
+ if (oldNode && this.contentEl_.firstChild !== oldNode) {
+ oldNode = null;
+ log$1.warn('TimeDisplay#updateTextnode_: Prevented replacement of text node element since it was no longer a child of this node. Appending a new node instead.');
+ }
+ this.textNode_ = document.createTextNode(this.formattedTime_);
+ if (!this.textNode_) {
+ return;
+ }
+ if (oldNode) {
+ this.contentEl_.replaceChild(this.textNode_, oldNode);
+ } else {
+ this.contentEl_.appendChild(this.textNode_);
+ }
+ });
+ }
+
+ /**
+ * To be filled out in the child class, should update the displayed time
+ * in accordance with the fact that the current time has changed.
+ *
+ * @param {Event} [event]
+ * The `timeupdate` event that caused this to run.
+ *
+ * @listens Player#timeupdate
+ */
+ updateContent(event) {}
+ }
+
+ /**
+ * The text that is added to the `TimeDisplay` for screen reader users.
+ *
+ * @type {string}
+ * @private
+ */
+ TimeDisplay.prototype.labelText_ = 'Time';
+
+ /**
+ * The text that should display over the `TimeDisplay`s controls. Added to for localization.
+ *
+ * @type {string}
+ * @protected
+ *
+ * @deprecated in v7; controlText_ is not used in non-active display Components
+ */
+ TimeDisplay.prototype.controlText_ = 'Time';
+ Component$1.registerComponent('TimeDisplay', TimeDisplay);
+
+ /**
+ * @file current-time-display.js
+ */
+
+ /**
+ * Displays the current time
+ *
+ * @extends Component
+ */
+ class CurrentTimeDisplay extends TimeDisplay {
+ /**
+ * Builds the default DOM `className`.
+ *
+ * @return {string}
+ * The DOM `className` for this object.
+ */
+ buildCSSClass() {
+ return 'vjs-current-time';
+ }
+
+ /**
+ * Update current time display
+ *
+ * @param {Event} [event]
+ * The `timeupdate` event that caused this function to run.
+ *
+ * @listens Player#timeupdate
+ */
+ updateContent(event) {
+ // Allows for smooth scrubbing, when player can't keep up.
+ let time;
+ if (this.player_.ended()) {
+ time = this.player_.duration();
+ } else {
+ time = this.player_.scrubbing() ? this.player_.getCache().currentTime : this.player_.currentTime();
+ }
+ this.updateTextNode_(time);
+ }
+ }
+
+ /**
+ * The text that is added to the `CurrentTimeDisplay` for screen reader users.
+ *
+ * @type {string}
+ * @private
+ */
+ CurrentTimeDisplay.prototype.labelText_ = 'Current Time';
+
+ /**
+ * The text that should display over the `CurrentTimeDisplay`s controls. Added to for localization.
+ *
+ * @type {string}
+ * @protected
+ *
+ * @deprecated in v7; controlText_ is not used in non-active display Components
+ */
+ CurrentTimeDisplay.prototype.controlText_ = 'Current Time';
+ Component$1.registerComponent('CurrentTimeDisplay', CurrentTimeDisplay);
+
+ /**
+ * @file duration-display.js
+ */
+
+ /**
+ * Displays the duration
+ *
+ * @extends Component
+ */
+ class DurationDisplay extends TimeDisplay {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('../../player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ */
+ constructor(player, options) {
+ super(player, options);
+ const updateContent = e => this.updateContent(e);
+
+ // we do not want to/need to throttle duration changes,
+ // as they should always display the changed duration as
+ // it has changed
+ this.on(player, 'durationchange', updateContent);
+
+ // Listen to loadstart because the player duration is reset when a new media element is loaded,
+ // but the durationchange on the user agent will not fire.
+ // @see [Spec]{@link https://www.w3.org/TR/2011/WD-html5-20110113/video.html#media-element-load-algorithm}
+ this.on(player, 'loadstart', updateContent);
+
+ // Also listen for timeupdate (in the parent) and loadedmetadata because removing those
+ // listeners could have broken dependent applications/libraries. These
+ // can likely be removed for 7.0.
+ this.on(player, 'loadedmetadata', updateContent);
+ }
+
+ /**
+ * Builds the default DOM `className`.
+ *
+ * @return {string}
+ * The DOM `className` for this object.
+ */
+ buildCSSClass() {
+ return 'vjs-duration';
+ }
+
+ /**
+ * Update duration time display.
+ *
+ * @param {Event} [event]
+ * The `durationchange`, `timeupdate`, or `loadedmetadata` event that caused
+ * this function to be called.
+ *
+ * @listens Player#durationchange
+ * @listens Player#timeupdate
+ * @listens Player#loadedmetadata
+ */
+ updateContent(event) {
+ const duration = this.player_.duration();
+ this.updateTextNode_(duration);
+ }
+ }
+
+ /**
+ * The text that is added to the `DurationDisplay` for screen reader users.
+ *
+ * @type {string}
+ * @private
+ */
+ DurationDisplay.prototype.labelText_ = 'Duration';
+
+ /**
+ * The text that should display over the `DurationDisplay`s controls. Added to for localization.
+ *
+ * @type {string}
+ * @protected
+ *
+ * @deprecated in v7; controlText_ is not used in non-active display Components
+ */
+ DurationDisplay.prototype.controlText_ = 'Duration';
+ Component$1.registerComponent('DurationDisplay', DurationDisplay);
+
+ /**
+ * @file time-divider.js
+ */
+
+ /**
+ * The separator between the current time and duration.
+ * Can be hidden if it's not needed in the design.
+ *
+ * @extends Component
+ */
+ class TimeDivider extends Component$1 {
+ /**
+ * Create the component's DOM element
+ *
+ * @return {Element}
+ * The element that was created.
+ */
+ createEl() {
+ const el = super.createEl('div', {
+ className: 'vjs-time-control vjs-time-divider'
+ }, {
+ // this element and its contents can be hidden from assistive techs since
+ // it is made extraneous by the announcement of the control text
+ // for the current time and duration displays
+ 'aria-hidden': true
+ });
+ const div = super.createEl('div');
+ const span = super.createEl('span', {
+ textContent: '/'
+ });
+ div.appendChild(span);
+ el.appendChild(div);
+ return el;
+ }
+ }
+ Component$1.registerComponent('TimeDivider', TimeDivider);
+
+ /**
+ * @file remaining-time-display.js
+ */
+
+ /**
+ * Displays the time left in the video
+ *
+ * @extends Component
+ */
+ class RemainingTimeDisplay extends TimeDisplay {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('../../player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ */
+ constructor(player, options) {
+ super(player, options);
+ this.on(player, 'durationchange', e => this.updateContent(e));
+ }
+
+ /**
+ * Builds the default DOM `className`.
+ *
+ * @return {string}
+ * The DOM `className` for this object.
+ */
+ buildCSSClass() {
+ return 'vjs-remaining-time';
+ }
+
+ /**
+ * Create the `Component`'s DOM element with the "minus" character prepend to the time
+ *
+ * @return {Element}
+ * The element that was created.
+ */
+ createEl() {
+ const el = super.createEl();
+ if (this.options_.displayNegative !== false) {
+ el.insertBefore(createEl('span', {}, {
+ 'aria-hidden': true
+ }, '-'), this.contentEl_);
+ }
+ return el;
+ }
+
+ /**
+ * Update remaining time display.
+ *
+ * @param {Event} [event]
+ * The `timeupdate` or `durationchange` event that caused this to run.
+ *
+ * @listens Player#timeupdate
+ * @listens Player#durationchange
+ */
+ updateContent(event) {
+ if (typeof this.player_.duration() !== 'number') {
+ return;
+ }
+ let time;
+
+ // @deprecated We should only use remainingTimeDisplay
+ // as of video.js 7
+ if (this.player_.ended()) {
+ time = 0;
+ } else if (this.player_.remainingTimeDisplay) {
+ time = this.player_.remainingTimeDisplay();
+ } else {
+ time = this.player_.remainingTime();
+ }
+ this.updateTextNode_(time);
+ }
+ }
+
+ /**
+ * The text that is added to the `RemainingTimeDisplay` for screen reader users.
+ *
+ * @type {string}
+ * @private
+ */
+ RemainingTimeDisplay.prototype.labelText_ = 'Remaining Time';
+
+ /**
+ * The text that should display over the `RemainingTimeDisplay`s controls. Added to for localization.
+ *
+ * @type {string}
+ * @protected
+ *
+ * @deprecated in v7; controlText_ is not used in non-active display Components
+ */
+ RemainingTimeDisplay.prototype.controlText_ = 'Remaining Time';
+ Component$1.registerComponent('RemainingTimeDisplay', RemainingTimeDisplay);
+
+ /**
+ * @file live-display.js
+ */
+
+ // TODO - Future make it click to snap to live
+
+ /**
+ * Displays the live indicator when duration is Infinity.
+ *
+ * @extends Component
+ */
+ class LiveDisplay extends Component$1 {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('./player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ */
+ constructor(player, options) {
+ super(player, options);
+ this.updateShowing();
+ this.on(this.player(), 'durationchange', e => this.updateShowing(e));
+ }
+
+ /**
+ * Create the `Component`'s DOM element
+ *
+ * @return {Element}
+ * The element that was created.
+ */
+ createEl() {
+ const el = super.createEl('div', {
+ className: 'vjs-live-control vjs-control'
+ });
+ this.contentEl_ = createEl('div', {
+ className: 'vjs-live-display'
+ }, {
+ 'aria-live': 'off'
+ });
+ this.contentEl_.appendChild(createEl('span', {
+ className: 'vjs-control-text',
+ textContent: `${this.localize('Stream Type')}\u00a0`
+ }));
+ this.contentEl_.appendChild(document.createTextNode(this.localize('LIVE')));
+ el.appendChild(this.contentEl_);
+ return el;
+ }
+ dispose() {
+ this.contentEl_ = null;
+ super.dispose();
+ }
+
+ /**
+ * Check the duration to see if the LiveDisplay should be showing or not. Then show/hide
+ * it accordingly
+ *
+ * @param {Event} [event]
+ * The {@link Player#durationchange} event that caused this function to run.
+ *
+ * @listens Player#durationchange
+ */
+ updateShowing(event) {
+ if (this.player().duration() === Infinity) {
+ this.show();
+ } else {
+ this.hide();
+ }
+ }
+ }
+ Component$1.registerComponent('LiveDisplay', LiveDisplay);
+
+ /**
+ * @file seek-to-live.js
+ */
+
+ /**
+ * Displays the live indicator when duration is Infinity.
+ *
+ * @extends Component
+ */
+ class SeekToLive extends Button {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('./player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ */
+ constructor(player, options) {
+ super(player, options);
+ this.updateLiveEdgeStatus();
+ if (this.player_.liveTracker) {
+ this.updateLiveEdgeStatusHandler_ = e => this.updateLiveEdgeStatus(e);
+ this.on(this.player_.liveTracker, 'liveedgechange', this.updateLiveEdgeStatusHandler_);
+ }
+ }
+
+ /**
+ * Create the `Component`'s DOM element
+ *
+ * @return {Element}
+ * The element that was created.
+ */
+ createEl() {
+ const el = super.createEl('button', {
+ className: 'vjs-seek-to-live-control vjs-control'
+ });
+ this.setIcon('circle', el);
+ this.textEl_ = createEl('span', {
+ className: 'vjs-seek-to-live-text',
+ textContent: this.localize('LIVE')
+ }, {
+ 'aria-hidden': 'true'
+ });
+ el.appendChild(this.textEl_);
+ return el;
+ }
+
+ /**
+ * Update the state of this button if we are at the live edge
+ * or not
+ */
+ updateLiveEdgeStatus() {
+ // default to live edge
+ if (!this.player_.liveTracker || this.player_.liveTracker.atLiveEdge()) {
+ this.setAttribute('aria-disabled', true);
+ this.addClass('vjs-at-live-edge');
+ this.controlText('Seek to live, currently playing live');
+ } else {
+ this.setAttribute('aria-disabled', false);
+ this.removeClass('vjs-at-live-edge');
+ this.controlText('Seek to live, currently behind live');
+ }
+ }
+
+ /**
+ * On click bring us as near to the live point as possible.
+ * This requires that we wait for the next `live-seekable-change`
+ * event which will happen every segment length seconds.
+ */
+ handleClick() {
+ this.player_.liveTracker.seekToLiveEdge();
+ }
+
+ /**
+ * Dispose of the element and stop tracking
+ */
+ dispose() {
+ if (this.player_.liveTracker) {
+ this.off(this.player_.liveTracker, 'liveedgechange', this.updateLiveEdgeStatusHandler_);
+ }
+ this.textEl_ = null;
+ super.dispose();
+ }
+ }
+ /**
+ * The text that should display over the `SeekToLive`s control. Added for localization.
+ *
+ * @type {string}
+ * @protected
+ */
+ SeekToLive.prototype.controlText_ = 'Seek to live, currently playing live';
+ Component$1.registerComponent('SeekToLive', SeekToLive);
+
+ /**
+ * @file num.js
+ * @module num
+ */
+
+ /**
+ * Keep a number between a min and a max value
+ *
+ * @param {number} number
+ * The number to clamp
+ *
+ * @param {number} min
+ * The minimum value
+ * @param {number} max
+ * The maximum value
+ *
+ * @return {number}
+ * the clamped number
+ */
+ function clamp(number, min, max) {
+ number = Number(number);
+ return Math.min(max, Math.max(min, isNaN(number) ? min : number));
+ }
+
+ var Num = /*#__PURE__*/Object.freeze({
+ __proto__: null,
+ clamp: clamp
+ });
+
+ /**
+ * @file slider.js
+ */
+
+ /**
+ * The base functionality for a slider. Can be vertical or horizontal.
+ * For instance the volume bar or the seek bar on a video is a slider.
+ *
+ * @extends Component
+ */
+ class Slider extends Component$1 {
+ /**
+ * Create an instance of this class
+ *
+ * @param { import('../player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ */
+ constructor(player, options) {
+ super(player, options);
+ this.handleMouseDown_ = e => this.handleMouseDown(e);
+ this.handleMouseUp_ = e => this.handleMouseUp(e);
+ this.handleKeyDown_ = e => this.handleKeyDown(e);
+ this.handleClick_ = e => this.handleClick(e);
+ this.handleMouseMove_ = e => this.handleMouseMove(e);
+ this.update_ = e => this.update(e);
+
+ // Set property names to bar to match with the child Slider class is looking for
+ this.bar = this.getChild(this.options_.barName);
+
+ // Set a horizontal or vertical class on the slider depending on the slider type
+ this.vertical(!!this.options_.vertical);
+ this.enable();
+ }
+
+ /**
+ * Are controls are currently enabled for this slider or not.
+ *
+ * @return {boolean}
+ * true if controls are enabled, false otherwise
+ */
+ enabled() {
+ return this.enabled_;
+ }
+
+ /**
+ * Enable controls for this slider if they are disabled
+ */
+ enable() {
+ if (this.enabled()) {
+ return;
+ }
+ this.on('mousedown', this.handleMouseDown_);
+ this.on('touchstart', this.handleMouseDown_);
+ this.on('keydown', this.handleKeyDown_);
+ this.on('click', this.handleClick_);
+
+ // TODO: deprecated, controlsvisible does not seem to be fired
+ this.on(this.player_, 'controlsvisible', this.update);
+ if (this.playerEvent) {
+ this.on(this.player_, this.playerEvent, this.update);
+ }
+ this.removeClass('disabled');
+ this.setAttribute('tabindex', 0);
+ this.enabled_ = true;
+ }
+
+ /**
+ * Disable controls for this slider if they are enabled
+ */
+ disable() {
+ if (!this.enabled()) {
+ return;
+ }
+ const doc = this.bar.el_.ownerDocument;
+ this.off('mousedown', this.handleMouseDown_);
+ this.off('touchstart', this.handleMouseDown_);
+ this.off('keydown', this.handleKeyDown_);
+ this.off('click', this.handleClick_);
+ this.off(this.player_, 'controlsvisible', this.update_);
+ this.off(doc, 'mousemove', this.handleMouseMove_);
+ this.off(doc, 'mouseup', this.handleMouseUp_);
+ this.off(doc, 'touchmove', this.handleMouseMove_);
+ this.off(doc, 'touchend', this.handleMouseUp_);
+ this.removeAttribute('tabindex');
+ this.addClass('disabled');
+ if (this.playerEvent) {
+ this.off(this.player_, this.playerEvent, this.update);
+ }
+ this.enabled_ = false;
+ }
+
+ /**
+ * Create the `Slider`s DOM element.
+ *
+ * @param {string} type
+ * Type of element to create.
+ *
+ * @param {Object} [props={}]
+ * List of properties in Object form.
+ *
+ * @param {Object} [attributes={}]
+ * list of attributes in Object form.
+ *
+ * @return {Element}
+ * The element that gets created.
+ */
+ createEl(type, props = {}, attributes = {}) {
+ // Add the slider element class to all sub classes
+ props.className = props.className + ' vjs-slider';
+ props = Object.assign({
+ tabIndex: 0
+ }, props);
+ attributes = Object.assign({
+ 'role': 'slider',
+ 'aria-valuenow': 0,
+ 'aria-valuemin': 0,
+ 'aria-valuemax': 100
+ }, attributes);
+ return super.createEl(type, props, attributes);
+ }
+
+ /**
+ * Handle `mousedown` or `touchstart` events on the `Slider`.
+ *
+ * @param {MouseEvent} event
+ * `mousedown` or `touchstart` event that triggered this function
+ *
+ * @listens mousedown
+ * @listens touchstart
+ * @fires Slider#slideractive
+ */
+ handleMouseDown(event) {
+ const doc = this.bar.el_.ownerDocument;
+ if (event.type === 'mousedown') {
+ event.preventDefault();
+ }
+ // Do not call preventDefault() on touchstart in Chrome
+ // to avoid console warnings. Use a 'touch-action: none' style
+ // instead to prevent unintended scrolling.
+ // https://developers.google.com/web/updates/2017/01/scrolling-intervention
+ if (event.type === 'touchstart' && !IS_CHROME) {
+ event.preventDefault();
+ }
+ blockTextSelection();
+ this.addClass('vjs-sliding');
+ /**
+ * Triggered when the slider is in an active state
+ *
+ * @event Slider#slideractive
+ * @type {MouseEvent}
+ */
+ this.trigger('slideractive');
+ this.on(doc, 'mousemove', this.handleMouseMove_);
+ this.on(doc, 'mouseup', this.handleMouseUp_);
+ this.on(doc, 'touchmove', this.handleMouseMove_);
+ this.on(doc, 'touchend', this.handleMouseUp_);
+ this.handleMouseMove(event, true);
+ }
+
+ /**
+ * Handle the `mousemove`, `touchmove`, and `mousedown` events on this `Slider`.
+ * The `mousemove` and `touchmove` events will only only trigger this function during
+ * `mousedown` and `touchstart`. This is due to {@link Slider#handleMouseDown} and
+ * {@link Slider#handleMouseUp}.
+ *
+ * @param {MouseEvent} event
+ * `mousedown`, `mousemove`, `touchstart`, or `touchmove` event that triggered
+ * this function
+ * @param {boolean} mouseDown this is a flag that should be set to true if `handleMouseMove` is called directly. It allows us to skip things that should not happen if coming from mouse down but should happen on regular mouse move handler. Defaults to false.
+ *
+ * @listens mousemove
+ * @listens touchmove
+ */
+ handleMouseMove(event) {}
+
+ /**
+ * Handle `mouseup` or `touchend` events on the `Slider`.
+ *
+ * @param {MouseEvent} event
+ * `mouseup` or `touchend` event that triggered this function.
+ *
+ * @listens touchend
+ * @listens mouseup
+ * @fires Slider#sliderinactive
+ */
+ handleMouseUp(event) {
+ const doc = this.bar.el_.ownerDocument;
+ unblockTextSelection();
+ this.removeClass('vjs-sliding');
+ /**
+ * Triggered when the slider is no longer in an active state.
+ *
+ * @event Slider#sliderinactive
+ * @type {Event}
+ */
+ this.trigger('sliderinactive');
+ this.off(doc, 'mousemove', this.handleMouseMove_);
+ this.off(doc, 'mouseup', this.handleMouseUp_);
+ this.off(doc, 'touchmove', this.handleMouseMove_);
+ this.off(doc, 'touchend', this.handleMouseUp_);
+ this.update();
+ }
+
+ /**
+ * Update the progress bar of the `Slider`.
+ *
+ * @return {number}
+ * The percentage of progress the progress bar represents as a
+ * number from 0 to 1.
+ */
+ update() {
+ // In VolumeBar init we have a setTimeout for update that pops and update
+ // to the end of the execution stack. The player is destroyed before then
+ // update will cause an error
+ // If there's no bar...
+ if (!this.el_ || !this.bar) {
+ return;
+ }
+
+ // clamp progress between 0 and 1
+ // and only round to four decimal places, as we round to two below
+ const progress = this.getProgress();
+ if (progress === this.progress_) {
+ return progress;
+ }
+ this.progress_ = progress;
+ this.requestNamedAnimationFrame('Slider#update', () => {
+ // Set the new bar width or height
+ const sizeKey = this.vertical() ? 'height' : 'width';
+
+ // Convert to a percentage for css value
+ this.bar.el().style[sizeKey] = (progress * 100).toFixed(2) + '%';
+ });
+ return progress;
+ }
+
+ /**
+ * Get the percentage of the bar that should be filled
+ * but clamped and rounded.
+ *
+ * @return {number}
+ * percentage filled that the slider is
+ */
+ getProgress() {
+ return Number(clamp(this.getPercent(), 0, 1).toFixed(4));
+ }
+
+ /**
+ * Calculate distance for slider
+ *
+ * @param {Event} event
+ * The event that caused this function to run.
+ *
+ * @return {number}
+ * The current position of the Slider.
+ * - position.x for vertical `Slider`s
+ * - position.y for horizontal `Slider`s
+ */
+ calculateDistance(event) {
+ const position = getPointerPosition(this.el_, event);
+ if (this.vertical()) {
+ return position.y;
+ }
+ return position.x;
+ }
+
+ /**
+ * Handle a `keydown` event on the `Slider`. Watches for left, right, up, and down
+ * arrow keys. This function will only be called when the slider has focus. See
+ * {@link Slider#handleFocus} and {@link Slider#handleBlur}.
+ *
+ * @param {KeyboardEvent} event
+ * the `keydown` event that caused this function to run.
+ *
+ * @listens keydown
+ */
+ handleKeyDown(event) {
+ // Left and Down Arrows
+ if (keycode.isEventKey(event, 'Left') || keycode.isEventKey(event, 'Down')) {
+ event.preventDefault();
+ event.stopPropagation();
+ this.stepBack();
+
+ // Up and Right Arrows
+ } else if (keycode.isEventKey(event, 'Right') || keycode.isEventKey(event, 'Up')) {
+ event.preventDefault();
+ event.stopPropagation();
+ this.stepForward();
+ } else {
+ // Pass keydown handling up for unsupported keys
+ super.handleKeyDown(event);
+ }
+ }
+
+ /**
+ * Listener for click events on slider, used to prevent clicks
+ * from bubbling up to parent elements like button menus.
+ *
+ * @param {Object} event
+ * Event that caused this object to run
+ */
+ handleClick(event) {
+ event.stopPropagation();
+ event.preventDefault();
+ }
+
+ /**
+ * Get/set if slider is horizontal for vertical
+ *
+ * @param {boolean} [bool]
+ * - true if slider is vertical,
+ * - false is horizontal
+ *
+ * @return {boolean}
+ * - true if slider is vertical, and getting
+ * - false if the slider is horizontal, and getting
+ */
+ vertical(bool) {
+ if (bool === undefined) {
+ return this.vertical_ || false;
+ }
+ this.vertical_ = !!bool;
+ if (this.vertical_) {
+ this.addClass('vjs-slider-vertical');
+ } else {
+ this.addClass('vjs-slider-horizontal');
+ }
+ }
+ }
+ Component$1.registerComponent('Slider', Slider);
+
+ /**
+ * @file load-progress-bar.js
+ */
+
+ // get the percent width of a time compared to the total end
+ const percentify = (time, end) => clamp(time / end * 100, 0, 100).toFixed(2) + '%';
+
+ /**
+ * Shows loading progress
+ *
+ * @extends Component
+ */
+ class LoadProgressBar extends Component$1 {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('../../player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ */
+ constructor(player, options) {
+ super(player, options);
+ this.partEls_ = [];
+ this.on(player, 'progress', e => this.update(e));
+ }
+
+ /**
+ * Create the `Component`'s DOM element
+ *
+ * @return {Element}
+ * The element that was created.
+ */
+ createEl() {
+ const el = super.createEl('div', {
+ className: 'vjs-load-progress'
+ });
+ const wrapper = createEl('span', {
+ className: 'vjs-control-text'
+ });
+ const loadedText = createEl('span', {
+ textContent: this.localize('Loaded')
+ });
+ const separator = document.createTextNode(': ');
+ this.percentageEl_ = createEl('span', {
+ className: 'vjs-control-text-loaded-percentage',
+ textContent: '0%'
+ });
+ el.appendChild(wrapper);
+ wrapper.appendChild(loadedText);
+ wrapper.appendChild(separator);
+ wrapper.appendChild(this.percentageEl_);
+ return el;
+ }
+ dispose() {
+ this.partEls_ = null;
+ this.percentageEl_ = null;
+ super.dispose();
+ }
+
+ /**
+ * Update progress bar
+ *
+ * @param {Event} [event]
+ * The `progress` event that caused this function to run.
+ *
+ * @listens Player#progress
+ */
+ update(event) {
+ this.requestNamedAnimationFrame('LoadProgressBar#update', () => {
+ const liveTracker = this.player_.liveTracker;
+ const buffered = this.player_.buffered();
+ const duration = liveTracker && liveTracker.isLive() ? liveTracker.seekableEnd() : this.player_.duration();
+ const bufferedEnd = this.player_.bufferedEnd();
+ const children = this.partEls_;
+ const percent = percentify(bufferedEnd, duration);
+ if (this.percent_ !== percent) {
+ // update the width of the progress bar
+ this.el_.style.width = percent;
+ // update the control-text
+ textContent(this.percentageEl_, percent);
+ this.percent_ = percent;
+ }
+
+ // add child elements to represent the individual buffered time ranges
+ for (let i = 0; i < buffered.length; i++) {
+ const start = buffered.start(i);
+ const end = buffered.end(i);
+ let part = children[i];
+ if (!part) {
+ part = this.el_.appendChild(createEl());
+ children[i] = part;
+ }
+
+ // only update if changed
+ if (part.dataset.start === start && part.dataset.end === end) {
+ continue;
+ }
+ part.dataset.start = start;
+ part.dataset.end = end;
+
+ // set the percent based on the width of the progress bar (bufferedEnd)
+ part.style.left = percentify(start, bufferedEnd);
+ part.style.width = percentify(end - start, bufferedEnd);
+ }
+
+ // remove unused buffered range elements
+ for (let i = children.length; i > buffered.length; i--) {
+ this.el_.removeChild(children[i - 1]);
+ }
+ children.length = buffered.length;
+ });
+ }
+ }
+ Component$1.registerComponent('LoadProgressBar', LoadProgressBar);
+
+ /**
+ * @file time-tooltip.js
+ */
+
+ /**
+ * Time tooltips display a time above the progress bar.
+ *
+ * @extends Component
+ */
+ class TimeTooltip extends Component$1 {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('../../player').default } player
+ * The {@link Player} that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ */
+ constructor(player, options) {
+ super(player, options);
+ this.update = throttle(bind_(this, this.update), UPDATE_REFRESH_INTERVAL);
+ }
+
+ /**
+ * Create the time tooltip DOM element
+ *
+ * @return {Element}
+ * The element that was created.
+ */
+ createEl() {
+ return super.createEl('div', {
+ className: 'vjs-time-tooltip'
+ }, {
+ 'aria-hidden': 'true'
+ });
+ }
+
+ /**
+ * Updates the position of the time tooltip relative to the `SeekBar`.
+ *
+ * @param {Object} seekBarRect
+ * The `ClientRect` for the {@link SeekBar} element.
+ *
+ * @param {number} seekBarPoint
+ * A number from 0 to 1, representing a horizontal reference point
+ * from the left edge of the {@link SeekBar}
+ */
+ update(seekBarRect, seekBarPoint, content) {
+ const tooltipRect = findPosition(this.el_);
+ const playerRect = getBoundingClientRect(this.player_.el());
+ const seekBarPointPx = seekBarRect.width * seekBarPoint;
+
+ // do nothing if either rect isn't available
+ // for example, if the player isn't in the DOM for testing
+ if (!playerRect || !tooltipRect) {
+ return;
+ }
+
+ // This is the space left of the `seekBarPoint` available within the bounds
+ // of the player. We calculate any gap between the left edge of the player
+ // and the left edge of the `SeekBar` and add the number of pixels in the
+ // `SeekBar` before hitting the `seekBarPoint`
+ let spaceLeftOfPoint = seekBarRect.left - playerRect.left + seekBarPointPx;
+
+ // This is the space right of the `seekBarPoint` available within the bounds
+ // of the player. We calculate the number of pixels from the `seekBarPoint`
+ // to the right edge of the `SeekBar` and add to that any gap between the
+ // right edge of the `SeekBar` and the player.
+ let spaceRightOfPoint = seekBarRect.width - seekBarPointPx + (playerRect.right - seekBarRect.right);
+
+ // spaceRightOfPoint is always NaN for mouse time display
+ // because the seekbarRect does not have a right property. This causes
+ // the mouse tool tip to be truncated when it's close to the right edge of the player.
+ // In such cases, we ignore the `playerRect.right - seekBarRect.right` value when calculating.
+ // For the sake of consistency, we ignore seekBarRect.left - playerRect.left for the left edge.
+ if (!spaceRightOfPoint) {
+ spaceRightOfPoint = seekBarRect.width - seekBarPointPx;
+ spaceLeftOfPoint = seekBarPointPx;
+ }
+ // This is the number of pixels by which the tooltip will need to be pulled
+ // further to the right to center it over the `seekBarPoint`.
+ let pullTooltipBy = tooltipRect.width / 2;
+
+ // Adjust the `pullTooltipBy` distance to the left or right depending on
+ // the results of the space calculations above.
+ if (spaceLeftOfPoint < pullTooltipBy) {
+ pullTooltipBy += pullTooltipBy - spaceLeftOfPoint;
+ } else if (spaceRightOfPoint < pullTooltipBy) {
+ pullTooltipBy = spaceRightOfPoint;
+ }
+
+ // Due to the imprecision of decimal/ratio based calculations and varying
+ // rounding behaviors, there are cases where the spacing adjustment is off
+ // by a pixel or two. This adds insurance to these calculations.
+ if (pullTooltipBy < 0) {
+ pullTooltipBy = 0;
+ } else if (pullTooltipBy > tooltipRect.width) {
+ pullTooltipBy = tooltipRect.width;
+ }
+
+ // prevent small width fluctuations within 0.4px from
+ // changing the value below.
+ // This really helps for live to prevent the play
+ // progress time tooltip from jittering
+ pullTooltipBy = Math.round(pullTooltipBy);
+ this.el_.style.right = `-${pullTooltipBy}px`;
+ this.write(content);
+ }
+
+ /**
+ * Write the time to the tooltip DOM element.
+ *
+ * @param {string} content
+ * The formatted time for the tooltip.
+ */
+ write(content) {
+ textContent(this.el_, content);
+ }
+
+ /**
+ * Updates the position of the time tooltip relative to the `SeekBar`.
+ *
+ * @param {Object} seekBarRect
+ * The `ClientRect` for the {@link SeekBar} element.
+ *
+ * @param {number} seekBarPoint
+ * A number from 0 to 1, representing a horizontal reference point
+ * from the left edge of the {@link SeekBar}
+ *
+ * @param {number} time
+ * The time to update the tooltip to, not used during live playback
+ *
+ * @param {Function} cb
+ * A function that will be called during the request animation frame
+ * for tooltips that need to do additional animations from the default
+ */
+ updateTime(seekBarRect, seekBarPoint, time, cb) {
+ this.requestNamedAnimationFrame('TimeTooltip#updateTime', () => {
+ let content;
+ const duration = this.player_.duration();
+ if (this.player_.liveTracker && this.player_.liveTracker.isLive()) {
+ const liveWindow = this.player_.liveTracker.liveWindow();
+ const secondsBehind = liveWindow - seekBarPoint * liveWindow;
+ content = (secondsBehind < 1 ? '' : '-') + formatTime(secondsBehind, liveWindow);
+ } else {
+ content = formatTime(time, duration);
+ }
+ this.update(seekBarRect, seekBarPoint, content);
+ if (cb) {
+ cb();
+ }
+ });
+ }
+ }
+ Component$1.registerComponent('TimeTooltip', TimeTooltip);
+
+ /**
+ * @file play-progress-bar.js
+ */
+
+ /**
+ * Used by {@link SeekBar} to display media playback progress as part of the
+ * {@link ProgressControl}.
+ *
+ * @extends Component
+ */
+ class PlayProgressBar extends Component$1 {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('../../player').default } player
+ * The {@link Player} that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ */
+ constructor(player, options) {
+ super(player, options);
+ this.setIcon('circle');
+ this.update = throttle(bind_(this, this.update), UPDATE_REFRESH_INTERVAL);
+ }
+
+ /**
+ * Create the the DOM element for this class.
+ *
+ * @return {Element}
+ * The element that was created.
+ */
+ createEl() {
+ return super.createEl('div', {
+ className: 'vjs-play-progress vjs-slider-bar'
+ }, {
+ 'aria-hidden': 'true'
+ });
+ }
+
+ /**
+ * Enqueues updates to its own DOM as well as the DOM of its
+ * {@link TimeTooltip} child.
+ *
+ * @param {Object} seekBarRect
+ * The `ClientRect` for the {@link SeekBar} element.
+ *
+ * @param {number} seekBarPoint
+ * A number from 0 to 1, representing a horizontal reference point
+ * from the left edge of the {@link SeekBar}
+ */
+ update(seekBarRect, seekBarPoint) {
+ const timeTooltip = this.getChild('timeTooltip');
+ if (!timeTooltip) {
+ return;
+ }
+ const time = this.player_.scrubbing() ? this.player_.getCache().currentTime : this.player_.currentTime();
+ timeTooltip.updateTime(seekBarRect, seekBarPoint, time);
+ }
+ }
+
+ /**
+ * Default options for {@link PlayProgressBar}.
+ *
+ * @type {Object}
+ * @private
+ */
+ PlayProgressBar.prototype.options_ = {
+ children: []
+ };
+
+ // Time tooltips should not be added to a player on mobile devices
+ if (!IS_IOS && !IS_ANDROID) {
+ PlayProgressBar.prototype.options_.children.push('timeTooltip');
+ }
+ Component$1.registerComponent('PlayProgressBar', PlayProgressBar);
+
+ /**
+ * @file mouse-time-display.js
+ */
+
+ /**
+ * The {@link MouseTimeDisplay} component tracks mouse movement over the
+ * {@link ProgressControl}. It displays an indicator and a {@link TimeTooltip}
+ * indicating the time which is represented by a given point in the
+ * {@link ProgressControl}.
+ *
+ * @extends Component
+ */
+ class MouseTimeDisplay extends Component$1 {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('../../player').default } player
+ * The {@link Player} that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ */
+ constructor(player, options) {
+ super(player, options);
+ this.update = throttle(bind_(this, this.update), UPDATE_REFRESH_INTERVAL);
+ }
+
+ /**
+ * Create the DOM element for this class.
+ *
+ * @return {Element}
+ * The element that was created.
+ */
+ createEl() {
+ return super.createEl('div', {
+ className: 'vjs-mouse-display'
+ });
+ }
+
+ /**
+ * Enqueues updates to its own DOM as well as the DOM of its
+ * {@link TimeTooltip} child.
+ *
+ * @param {Object} seekBarRect
+ * The `ClientRect` for the {@link SeekBar} element.
+ *
+ * @param {number} seekBarPoint
+ * A number from 0 to 1, representing a horizontal reference point
+ * from the left edge of the {@link SeekBar}
+ */
+ update(seekBarRect, seekBarPoint) {
+ const time = seekBarPoint * this.player_.duration();
+ this.getChild('timeTooltip').updateTime(seekBarRect, seekBarPoint, time, () => {
+ this.el_.style.left = `${seekBarRect.width * seekBarPoint}px`;
+ });
+ }
+ }
+
+ /**
+ * Default options for `MouseTimeDisplay`
+ *
+ * @type {Object}
+ * @private
+ */
+ MouseTimeDisplay.prototype.options_ = {
+ children: ['timeTooltip']
+ };
+ Component$1.registerComponent('MouseTimeDisplay', MouseTimeDisplay);
+
+ /**
+ * @file seek-bar.js
+ */
+
+ // The number of seconds the `step*` functions move the timeline.
+ const STEP_SECONDS = 5;
+
+ // The multiplier of STEP_SECONDS that PgUp/PgDown move the timeline.
+ const PAGE_KEY_MULTIPLIER = 12;
+
+ /**
+ * Seek bar and container for the progress bars. Uses {@link PlayProgressBar}
+ * as its `bar`.
+ *
+ * @extends Slider
+ */
+ class SeekBar extends Slider {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('../../player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ */
+ constructor(player, options) {
+ super(player, options);
+ this.setEventHandlers_();
+ }
+
+ /**
+ * Sets the event handlers
+ *
+ * @private
+ */
+ setEventHandlers_() {
+ this.update_ = bind_(this, this.update);
+ this.update = throttle(this.update_, UPDATE_REFRESH_INTERVAL);
+ this.on(this.player_, ['ended', 'durationchange', 'timeupdate'], this.update);
+ if (this.player_.liveTracker) {
+ this.on(this.player_.liveTracker, 'liveedgechange', this.update);
+ }
+
+ // when playing, let's ensure we smoothly update the play progress bar
+ // via an interval
+ this.updateInterval = null;
+ this.enableIntervalHandler_ = e => this.enableInterval_(e);
+ this.disableIntervalHandler_ = e => this.disableInterval_(e);
+ this.on(this.player_, ['playing'], this.enableIntervalHandler_);
+ this.on(this.player_, ['ended', 'pause', 'waiting'], this.disableIntervalHandler_);
+
+ // we don't need to update the play progress if the document is hidden,
+ // also, this causes the CPU to spike and eventually crash the page on IE11.
+ if ('hidden' in document && 'visibilityState' in document) {
+ this.on(document, 'visibilitychange', this.toggleVisibility_);
+ }
+ }
+ toggleVisibility_(e) {
+ if (document.visibilityState === 'hidden') {
+ this.cancelNamedAnimationFrame('SeekBar#update');
+ this.cancelNamedAnimationFrame('Slider#update');
+ this.disableInterval_(e);
+ } else {
+ if (!this.player_.ended() && !this.player_.paused()) {
+ this.enableInterval_();
+ }
+
+ // we just switched back to the page and someone may be looking, so, update ASAP
+ this.update();
+ }
+ }
+ enableInterval_() {
+ if (this.updateInterval) {
+ return;
+ }
+ this.updateInterval = this.setInterval(this.update, UPDATE_REFRESH_INTERVAL);
+ }
+ disableInterval_(e) {
+ if (this.player_.liveTracker && this.player_.liveTracker.isLive() && e && e.type !== 'ended') {
+ return;
+ }
+ if (!this.updateInterval) {
+ return;
+ }
+ this.clearInterval(this.updateInterval);
+ this.updateInterval = null;
+ }
+
+ /**
+ * Create the `Component`'s DOM element
+ *
+ * @return {Element}
+ * The element that was created.
+ */
+ createEl() {
+ return super.createEl('div', {
+ className: 'vjs-progress-holder'
+ }, {
+ 'aria-label': this.localize('Progress Bar')
+ });
+ }
+
+ /**
+ * This function updates the play progress bar and accessibility
+ * attributes to whatever is passed in.
+ *
+ * @param {Event} [event]
+ * The `timeupdate` or `ended` event that caused this to run.
+ *
+ * @listens Player#timeupdate
+ *
+ * @return {number}
+ * The current percent at a number from 0-1
+ */
+ update(event) {
+ // ignore updates while the tab is hidden
+ if (document.visibilityState === 'hidden') {
+ return;
+ }
+ const percent = super.update();
+ this.requestNamedAnimationFrame('SeekBar#update', () => {
+ const currentTime = this.player_.ended() ? this.player_.duration() : this.getCurrentTime_();
+ const liveTracker = this.player_.liveTracker;
+ let duration = this.player_.duration();
+ if (liveTracker && liveTracker.isLive()) {
+ duration = this.player_.liveTracker.liveCurrentTime();
+ }
+ if (this.percent_ !== percent) {
+ // machine readable value of progress bar (percentage complete)
+ this.el_.setAttribute('aria-valuenow', (percent * 100).toFixed(2));
+ this.percent_ = percent;
+ }
+ if (this.currentTime_ !== currentTime || this.duration_ !== duration) {
+ // human readable value of progress bar (time complete)
+ this.el_.setAttribute('aria-valuetext', this.localize('progress bar timing: currentTime={1} duration={2}', [formatTime(currentTime, duration), formatTime(duration, duration)], '{1} of {2}'));
+ this.currentTime_ = currentTime;
+ this.duration_ = duration;
+ }
+
+ // update the progress bar time tooltip with the current time
+ if (this.bar) {
+ this.bar.update(getBoundingClientRect(this.el()), this.getProgress());
+ }
+ });
+ return percent;
+ }
+
+ /**
+ * Prevent liveThreshold from causing seeks to seem like they
+ * are not happening from a user perspective.
+ *
+ * @param {number} ct
+ * current time to seek to
+ */
+ userSeek_(ct) {
+ if (this.player_.liveTracker && this.player_.liveTracker.isLive()) {
+ this.player_.liveTracker.nextSeekedFromUser();
+ }
+ this.player_.currentTime(ct);
+ }
+
+ /**
+ * Get the value of current time but allows for smooth scrubbing,
+ * when player can't keep up.
+ *
+ * @return {number}
+ * The current time value to display
+ *
+ * @private
+ */
+ getCurrentTime_() {
+ return this.player_.scrubbing() ? this.player_.getCache().currentTime : this.player_.currentTime();
+ }
+
+ /**
+ * Get the percentage of media played so far.
+ *
+ * @return {number}
+ * The percentage of media played so far (0 to 1).
+ */
+ getPercent() {
+ const currentTime = this.getCurrentTime_();
+ let percent;
+ const liveTracker = this.player_.liveTracker;
+ if (liveTracker && liveTracker.isLive()) {
+ percent = (currentTime - liveTracker.seekableStart()) / liveTracker.liveWindow();
+
+ // prevent the percent from changing at the live edge
+ if (liveTracker.atLiveEdge()) {
+ percent = 1;
+ }
+ } else {
+ percent = currentTime / this.player_.duration();
+ }
+ return percent;
+ }
+
+ /**
+ * Handle mouse down on seek bar
+ *
+ * @param {MouseEvent} event
+ * The `mousedown` event that caused this to run.
+ *
+ * @listens mousedown
+ */
+ handleMouseDown(event) {
+ if (!isSingleLeftClick(event)) {
+ return;
+ }
+
+ // Stop event propagation to prevent double fire in progress-control.js
+ event.stopPropagation();
+ this.videoWasPlaying = !this.player_.paused();
+ this.player_.pause();
+ super.handleMouseDown(event);
+ }
+
+ /**
+ * Handle mouse move on seek bar
+ *
+ * @param {MouseEvent} event
+ * The `mousemove` event that caused this to run.
+ * @param {boolean} mouseDown this is a flag that should be set to true if `handleMouseMove` is called directly. It allows us to skip things that should not happen if coming from mouse down but should happen on regular mouse move handler. Defaults to false
+ *
+ * @listens mousemove
+ */
+ handleMouseMove(event, mouseDown = false) {
+ if (!isSingleLeftClick(event) || isNaN(this.player_.duration())) {
+ return;
+ }
+ if (!mouseDown && !this.player_.scrubbing()) {
+ this.player_.scrubbing(true);
+ }
+ let newTime;
+ const distance = this.calculateDistance(event);
+ const liveTracker = this.player_.liveTracker;
+ if (!liveTracker || !liveTracker.isLive()) {
+ newTime = distance * this.player_.duration();
+
+ // Don't let video end while scrubbing.
+ if (newTime === this.player_.duration()) {
+ newTime = newTime - 0.1;
+ }
+ } else {
+ if (distance >= 0.99) {
+ liveTracker.seekToLiveEdge();
+ return;
+ }
+ const seekableStart = liveTracker.seekableStart();
+ const seekableEnd = liveTracker.liveCurrentTime();
+ newTime = seekableStart + distance * liveTracker.liveWindow();
+
+ // Don't let video end while scrubbing.
+ if (newTime >= seekableEnd) {
+ newTime = seekableEnd;
+ }
+
+ // Compensate for precision differences so that currentTime is not less
+ // than seekable start
+ if (newTime <= seekableStart) {
+ newTime = seekableStart + 0.1;
+ }
+
+ // On android seekableEnd can be Infinity sometimes,
+ // this will cause newTime to be Infinity, which is
+ // not a valid currentTime.
+ if (newTime === Infinity) {
+ return;
+ }
+ }
+
+ // Set new time (tell player to seek to new time)
+ this.userSeek_(newTime);
+ if (this.player_.options_.enableSmoothSeeking) {
+ this.update();
+ }
+ }
+ enable() {
+ super.enable();
+ const mouseTimeDisplay = this.getChild('mouseTimeDisplay');
+ if (!mouseTimeDisplay) {
+ return;
+ }
+ mouseTimeDisplay.show();
+ }
+ disable() {
+ super.disable();
+ const mouseTimeDisplay = this.getChild('mouseTimeDisplay');
+ if (!mouseTimeDisplay) {
+ return;
+ }
+ mouseTimeDisplay.hide();
+ }
+
+ /**
+ * Handle mouse up on seek bar
+ *
+ * @param {MouseEvent} event
+ * The `mouseup` event that caused this to run.
+ *
+ * @listens mouseup
+ */
+ handleMouseUp(event) {
+ super.handleMouseUp(event);
+
+ // Stop event propagation to prevent double fire in progress-control.js
+ if (event) {
+ event.stopPropagation();
+ }
+ this.player_.scrubbing(false);
+
+ /**
+ * Trigger timeupdate because we're done seeking and the time has changed.
+ * This is particularly useful for if the player is paused to time the time displays.
+ *
+ * @event Tech#timeupdate
+ * @type {Event}
+ */
+ this.player_.trigger({
+ type: 'timeupdate',
+ target: this,
+ manuallyTriggered: true
+ });
+ if (this.videoWasPlaying) {
+ silencePromise(this.player_.play());
+ } else {
+ // We're done seeking and the time has changed.
+ // If the player is paused, make sure we display the correct time on the seek bar.
+ this.update_();
+ }
+ }
+
+ /**
+ * Move more quickly fast forward for keyboard-only users
+ */
+ stepForward() {
+ this.userSeek_(this.player_.currentTime() + STEP_SECONDS);
+ }
+
+ /**
+ * Move more quickly rewind for keyboard-only users
+ */
+ stepBack() {
+ this.userSeek_(this.player_.currentTime() - STEP_SECONDS);
+ }
+
+ /**
+ * Toggles the playback state of the player
+ * This gets called when enter or space is used on the seekbar
+ *
+ * @param {KeyboardEvent} event
+ * The `keydown` event that caused this function to be called
+ *
+ */
+ handleAction(event) {
+ if (this.player_.paused()) {
+ this.player_.play();
+ } else {
+ this.player_.pause();
+ }
+ }
+
+ /**
+ * Called when this SeekBar has focus and a key gets pressed down.
+ * Supports the following keys:
+ *
+ * Space or Enter key fire a click event
+ * Home key moves to start of the timeline
+ * End key moves to end of the timeline
+ * Digit "0" through "9" keys move to 0%, 10% ... 80%, 90% of the timeline
+ * PageDown key moves back a larger step than ArrowDown
+ * PageUp key moves forward a large step
+ *
+ * @param {KeyboardEvent} event
+ * The `keydown` event that caused this function to be called.
+ *
+ * @listens keydown
+ */
+ handleKeyDown(event) {
+ const liveTracker = this.player_.liveTracker;
+ if (keycode.isEventKey(event, 'Space') || keycode.isEventKey(event, 'Enter')) {
+ event.preventDefault();
+ event.stopPropagation();
+ this.handleAction(event);
+ } else if (keycode.isEventKey(event, 'Home')) {
+ event.preventDefault();
+ event.stopPropagation();
+ this.userSeek_(0);
+ } else if (keycode.isEventKey(event, 'End')) {
+ event.preventDefault();
+ event.stopPropagation();
+ if (liveTracker && liveTracker.isLive()) {
+ this.userSeek_(liveTracker.liveCurrentTime());
+ } else {
+ this.userSeek_(this.player_.duration());
+ }
+ } else if (/^[0-9]$/.test(keycode(event))) {
+ event.preventDefault();
+ event.stopPropagation();
+ const gotoFraction = (keycode.codes[keycode(event)] - keycode.codes['0']) * 10.0 / 100.0;
+ if (liveTracker && liveTracker.isLive()) {
+ this.userSeek_(liveTracker.seekableStart() + liveTracker.liveWindow() * gotoFraction);
+ } else {
+ this.userSeek_(this.player_.duration() * gotoFraction);
+ }
+ } else if (keycode.isEventKey(event, 'PgDn')) {
+ event.preventDefault();
+ event.stopPropagation();
+ this.userSeek_(this.player_.currentTime() - STEP_SECONDS * PAGE_KEY_MULTIPLIER);
+ } else if (keycode.isEventKey(event, 'PgUp')) {
+ event.preventDefault();
+ event.stopPropagation();
+ this.userSeek_(this.player_.currentTime() + STEP_SECONDS * PAGE_KEY_MULTIPLIER);
+ } else {
+ // Pass keydown handling up for unsupported keys
+ super.handleKeyDown(event);
+ }
+ }
+ dispose() {
+ this.disableInterval_();
+ this.off(this.player_, ['ended', 'durationchange', 'timeupdate'], this.update);
+ if (this.player_.liveTracker) {
+ this.off(this.player_.liveTracker, 'liveedgechange', this.update);
+ }
+ this.off(this.player_, ['playing'], this.enableIntervalHandler_);
+ this.off(this.player_, ['ended', 'pause', 'waiting'], this.disableIntervalHandler_);
+
+ // we don't need to update the play progress if the document is hidden,
+ // also, this causes the CPU to spike and eventually crash the page on IE11.
+ if ('hidden' in document && 'visibilityState' in document) {
+ this.off(document, 'visibilitychange', this.toggleVisibility_);
+ }
+ super.dispose();
+ }
+ }
+
+ /**
+ * Default options for the `SeekBar`
+ *
+ * @type {Object}
+ * @private
+ */
+ SeekBar.prototype.options_ = {
+ children: ['loadProgressBar', 'playProgressBar'],
+ barName: 'playProgressBar'
+ };
+
+ // MouseTimeDisplay tooltips should not be added to a player on mobile devices
+ if (!IS_IOS && !IS_ANDROID) {
+ SeekBar.prototype.options_.children.splice(1, 0, 'mouseTimeDisplay');
+ }
+ Component$1.registerComponent('SeekBar', SeekBar);
+
+ /**
+ * @file progress-control.js
+ */
+
+ /**
+ * The Progress Control component contains the seek bar, load progress,
+ * and play progress.
+ *
+ * @extends Component
+ */
+ class ProgressControl extends Component$1 {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('../../player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ */
+ constructor(player, options) {
+ super(player, options);
+ this.handleMouseMove = throttle(bind_(this, this.handleMouseMove), UPDATE_REFRESH_INTERVAL);
+ this.throttledHandleMouseSeek = throttle(bind_(this, this.handleMouseSeek), UPDATE_REFRESH_INTERVAL);
+ this.handleMouseUpHandler_ = e => this.handleMouseUp(e);
+ this.handleMouseDownHandler_ = e => this.handleMouseDown(e);
+ this.enable();
+ }
+
+ /**
+ * Create the `Component`'s DOM element
+ *
+ * @return {Element}
+ * The element that was created.
+ */
+ createEl() {
+ return super.createEl('div', {
+ className: 'vjs-progress-control vjs-control'
+ });
+ }
+
+ /**
+ * When the mouse moves over the `ProgressControl`, the pointer position
+ * gets passed down to the `MouseTimeDisplay` component.
+ *
+ * @param {Event} event
+ * The `mousemove` event that caused this function to run.
+ *
+ * @listen mousemove
+ */
+ handleMouseMove(event) {
+ const seekBar = this.getChild('seekBar');
+ if (!seekBar) {
+ return;
+ }
+ const playProgressBar = seekBar.getChild('playProgressBar');
+ const mouseTimeDisplay = seekBar.getChild('mouseTimeDisplay');
+ if (!playProgressBar && !mouseTimeDisplay) {
+ return;
+ }
+ const seekBarEl = seekBar.el();
+ const seekBarRect = findPosition(seekBarEl);
+ let seekBarPoint = getPointerPosition(seekBarEl, event).x;
+
+ // The default skin has a gap on either side of the `SeekBar`. This means
+ // that it's possible to trigger this behavior outside the boundaries of
+ // the `SeekBar`. This ensures we stay within it at all times.
+ seekBarPoint = clamp(seekBarPoint, 0, 1);
+ if (mouseTimeDisplay) {
+ mouseTimeDisplay.update(seekBarRect, seekBarPoint);
+ }
+ if (playProgressBar) {
+ playProgressBar.update(seekBarRect, seekBar.getProgress());
+ }
+ }
+
+ /**
+ * A throttled version of the {@link ProgressControl#handleMouseSeek} listener.
+ *
+ * @method ProgressControl#throttledHandleMouseSeek
+ * @param {Event} event
+ * The `mousemove` event that caused this function to run.
+ *
+ * @listen mousemove
+ * @listen touchmove
+ */
+
+ /**
+ * Handle `mousemove` or `touchmove` events on the `ProgressControl`.
+ *
+ * @param {Event} event
+ * `mousedown` or `touchstart` event that triggered this function
+ *
+ * @listens mousemove
+ * @listens touchmove
+ */
+ handleMouseSeek(event) {
+ const seekBar = this.getChild('seekBar');
+ if (seekBar) {
+ seekBar.handleMouseMove(event);
+ }
+ }
+
+ /**
+ * Are controls are currently enabled for this progress control.
+ *
+ * @return {boolean}
+ * true if controls are enabled, false otherwise
+ */
+ enabled() {
+ return this.enabled_;
+ }
+
+ /**
+ * Disable all controls on the progress control and its children
+ */
+ disable() {
+ this.children().forEach(child => child.disable && child.disable());
+ if (!this.enabled()) {
+ return;
+ }
+ this.off(['mousedown', 'touchstart'], this.handleMouseDownHandler_);
+ this.off(this.el_, 'mousemove', this.handleMouseMove);
+ this.removeListenersAddedOnMousedownAndTouchstart();
+ this.addClass('disabled');
+ this.enabled_ = false;
+
+ // Restore normal playback state if controls are disabled while scrubbing
+ if (this.player_.scrubbing()) {
+ const seekBar = this.getChild('seekBar');
+ this.player_.scrubbing(false);
+ if (seekBar.videoWasPlaying) {
+ silencePromise(this.player_.play());
+ }
+ }
+ }
+
+ /**
+ * Enable all controls on the progress control and its children
+ */
+ enable() {
+ this.children().forEach(child => child.enable && child.enable());
+ if (this.enabled()) {
+ return;
+ }
+ this.on(['mousedown', 'touchstart'], this.handleMouseDownHandler_);
+ this.on(this.el_, 'mousemove', this.handleMouseMove);
+ this.removeClass('disabled');
+ this.enabled_ = true;
+ }
+
+ /**
+ * Cleanup listeners after the user finishes interacting with the progress controls
+ */
+ removeListenersAddedOnMousedownAndTouchstart() {
+ const doc = this.el_.ownerDocument;
+ this.off(doc, 'mousemove', this.throttledHandleMouseSeek);
+ this.off(doc, 'touchmove', this.throttledHandleMouseSeek);
+ this.off(doc, 'mouseup', this.handleMouseUpHandler_);
+ this.off(doc, 'touchend', this.handleMouseUpHandler_);
+ }
+
+ /**
+ * Handle `mousedown` or `touchstart` events on the `ProgressControl`.
+ *
+ * @param {Event} event
+ * `mousedown` or `touchstart` event that triggered this function
+ *
+ * @listens mousedown
+ * @listens touchstart
+ */
+ handleMouseDown(event) {
+ const doc = this.el_.ownerDocument;
+ const seekBar = this.getChild('seekBar');
+ if (seekBar) {
+ seekBar.handleMouseDown(event);
+ }
+ this.on(doc, 'mousemove', this.throttledHandleMouseSeek);
+ this.on(doc, 'touchmove', this.throttledHandleMouseSeek);
+ this.on(doc, 'mouseup', this.handleMouseUpHandler_);
+ this.on(doc, 'touchend', this.handleMouseUpHandler_);
+ }
+
+ /**
+ * Handle `mouseup` or `touchend` events on the `ProgressControl`.
+ *
+ * @param {Event} event
+ * `mouseup` or `touchend` event that triggered this function.
+ *
+ * @listens touchend
+ * @listens mouseup
+ */
+ handleMouseUp(event) {
+ const seekBar = this.getChild('seekBar');
+ if (seekBar) {
+ seekBar.handleMouseUp(event);
+ }
+ this.removeListenersAddedOnMousedownAndTouchstart();
+ }
+ }
+
+ /**
+ * Default options for `ProgressControl`
+ *
+ * @type {Object}
+ * @private
+ */
+ ProgressControl.prototype.options_ = {
+ children: ['seekBar']
+ };
+ Component$1.registerComponent('ProgressControl', ProgressControl);
+
+ /**
+ * @file picture-in-picture-toggle.js
+ */
+
+ /**
+ * Toggle Picture-in-Picture mode
+ *
+ * @extends Button
+ */
+ class PictureInPictureToggle extends Button {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('./player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ *
+ * @listens Player#enterpictureinpicture
+ * @listens Player#leavepictureinpicture
+ */
+ constructor(player, options) {
+ super(player, options);
+ this.setIcon('picture-in-picture-enter');
+ this.on(player, ['enterpictureinpicture', 'leavepictureinpicture'], e => this.handlePictureInPictureChange(e));
+ this.on(player, ['disablepictureinpicturechanged', 'loadedmetadata'], e => this.handlePictureInPictureEnabledChange(e));
+ this.on(player, ['loadedmetadata', 'audioonlymodechange', 'audiopostermodechange'], () => this.handlePictureInPictureAudioModeChange());
+
+ // TODO: Deactivate button on player emptied event.
+ this.disable();
+ }
+
+ /**
+ * Builds the default DOM `className`.
+ *
+ * @return {string}
+ * The DOM `className` for this object.
+ */
+ buildCSSClass() {
+ return `vjs-picture-in-picture-control vjs-hidden ${super.buildCSSClass()}`;
+ }
+
+ /**
+ * Displays or hides the button depending on the audio mode detection.
+ * Exits picture-in-picture if it is enabled when switching to audio mode.
+ */
+ handlePictureInPictureAudioModeChange() {
+ // This audio detection will not detect HLS or DASH audio-only streams because there was no reliable way to detect them at the time
+ const isSourceAudio = this.player_.currentType().substring(0, 5) === 'audio';
+ const isAudioMode = isSourceAudio || this.player_.audioPosterMode() || this.player_.audioOnlyMode();
+ if (!isAudioMode) {
+ this.show();
+ return;
+ }
+ if (this.player_.isInPictureInPicture()) {
+ this.player_.exitPictureInPicture();
+ }
+ this.hide();
+ }
+
+ /**
+ * Enables or disables button based on availability of a Picture-In-Picture mode.
+ *
+ * Enabled if
+ * - `player.options().enableDocumentPictureInPicture` is true and
+ * window.documentPictureInPicture is available; or
+ * - `player.disablePictureInPicture()` is false and
+ * element.requestPictureInPicture is available
+ */
+ handlePictureInPictureEnabledChange() {
+ if (document.pictureInPictureEnabled && this.player_.disablePictureInPicture() === false || this.player_.options_.enableDocumentPictureInPicture && 'documentPictureInPicture' in window) {
+ this.enable();
+ } else {
+ this.disable();
+ }
+ }
+
+ /**
+ * Handles enterpictureinpicture and leavepictureinpicture on the player and change control text accordingly.
+ *
+ * @param {Event} [event]
+ * The {@link Player#enterpictureinpicture} or {@link Player#leavepictureinpicture} event that caused this function to be
+ * called.
+ *
+ * @listens Player#enterpictureinpicture
+ * @listens Player#leavepictureinpicture
+ */
+ handlePictureInPictureChange(event) {
+ if (this.player_.isInPictureInPicture()) {
+ this.setIcon('picture-in-picture-exit');
+ this.controlText('Exit Picture-in-Picture');
+ } else {
+ this.setIcon('picture-in-picture-enter');
+ this.controlText('Picture-in-Picture');
+ }
+ this.handlePictureInPictureEnabledChange();
+ }
+
+ /**
+ * This gets called when an `PictureInPictureToggle` is "clicked". See
+ * {@link ClickableComponent} for more detailed information on what a click can be.
+ *
+ * @param {Event} [event]
+ * The `keydown`, `tap`, or `click` event that caused this function to be
+ * called.
+ *
+ * @listens tap
+ * @listens click
+ */
+ handleClick(event) {
+ if (!this.player_.isInPictureInPicture()) {
+ this.player_.requestPictureInPicture();
+ } else {
+ this.player_.exitPictureInPicture();
+ }
+ }
+
+ /**
+ * Show the `Component`s element if it is hidden by removing the
+ * 'vjs-hidden' class name from it only in browsers that support the Picture-in-Picture API.
+ */
+ show() {
+ // Does not allow to display the pictureInPictureToggle in browsers that do not support the Picture-in-Picture API, e.g. Firefox.
+ if (typeof document.exitPictureInPicture !== 'function') {
+ return;
+ }
+ super.show();
+ }
+ }
+
+ /**
+ * The text that should display over the `PictureInPictureToggle`s controls. Added for localization.
+ *
+ * @type {string}
+ * @protected
+ */
+ PictureInPictureToggle.prototype.controlText_ = 'Picture-in-Picture';
+ Component$1.registerComponent('PictureInPictureToggle', PictureInPictureToggle);
+
+ /**
+ * @file fullscreen-toggle.js
+ */
+
+ /**
+ * Toggle fullscreen video
+ *
+ * @extends Button
+ */
+ class FullscreenToggle extends Button {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('./player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ */
+ constructor(player, options) {
+ super(player, options);
+ this.setIcon('fullscreen-enter');
+ this.on(player, 'fullscreenchange', e => this.handleFullscreenChange(e));
+ if (document[player.fsApi_.fullscreenEnabled] === false) {
+ this.disable();
+ }
+ }
+
+ /**
+ * Builds the default DOM `className`.
+ *
+ * @return {string}
+ * The DOM `className` for this object.
+ */
+ buildCSSClass() {
+ return `vjs-fullscreen-control ${super.buildCSSClass()}`;
+ }
+
+ /**
+ * Handles fullscreenchange on the player and change control text accordingly.
+ *
+ * @param {Event} [event]
+ * The {@link Player#fullscreenchange} event that caused this function to be
+ * called.
+ *
+ * @listens Player#fullscreenchange
+ */
+ handleFullscreenChange(event) {
+ if (this.player_.isFullscreen()) {
+ this.controlText('Exit Fullscreen');
+ this.setIcon('fullscreen-exit');
+ } else {
+ this.controlText('Fullscreen');
+ this.setIcon('fullscreen-enter');
+ }
+ }
+
+ /**
+ * This gets called when an `FullscreenToggle` is "clicked". See
+ * {@link ClickableComponent} for more detailed information on what a click can be.
+ *
+ * @param {Event} [event]
+ * The `keydown`, `tap`, or `click` event that caused this function to be
+ * called.
+ *
+ * @listens tap
+ * @listens click
+ */
+ handleClick(event) {
+ if (!this.player_.isFullscreen()) {
+ this.player_.requestFullscreen();
+ } else {
+ this.player_.exitFullscreen();
+ }
+ }
+ }
+
+ /**
+ * The text that should display over the `FullscreenToggle`s controls. Added for localization.
+ *
+ * @type {string}
+ * @protected
+ */
+ FullscreenToggle.prototype.controlText_ = 'Fullscreen';
+ Component$1.registerComponent('FullscreenToggle', FullscreenToggle);
+
+ /**
+ * Check if volume control is supported and if it isn't hide the
+ * `Component` that was passed using the `vjs-hidden` class.
+ *
+ * @param { import('../../component').default } self
+ * The component that should be hidden if volume is unsupported
+ *
+ * @param { import('../../player').default } player
+ * A reference to the player
+ *
+ * @private
+ */
+ const checkVolumeSupport = function (self, player) {
+ // hide volume controls when they're not supported by the current tech
+ if (player.tech_ && !player.tech_.featuresVolumeControl) {
+ self.addClass('vjs-hidden');
+ }
+ self.on(player, 'loadstart', function () {
+ if (!player.tech_.featuresVolumeControl) {
+ self.addClass('vjs-hidden');
+ } else {
+ self.removeClass('vjs-hidden');
+ }
+ });
+ };
+
+ /**
+ * @file volume-level.js
+ */
+
+ /**
+ * Shows volume level
+ *
+ * @extends Component
+ */
+ class VolumeLevel extends Component$1 {
+ /**
+ * Create the `Component`'s DOM element
+ *
+ * @return {Element}
+ * The element that was created.
+ */
+ createEl() {
+ const el = super.createEl('div', {
+ className: 'vjs-volume-level'
+ });
+ this.setIcon('circle', el);
+ el.appendChild(super.createEl('span', {
+ className: 'vjs-control-text'
+ }));
+ return el;
+ }
+ }
+ Component$1.registerComponent('VolumeLevel', VolumeLevel);
+
+ /**
+ * @file volume-level-tooltip.js
+ */
+
+ /**
+ * Volume level tooltips display a volume above or side by side the volume bar.
+ *
+ * @extends Component
+ */
+ class VolumeLevelTooltip extends Component$1 {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('../../player').default } player
+ * The {@link Player} that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ */
+ constructor(player, options) {
+ super(player, options);
+ this.update = throttle(bind_(this, this.update), UPDATE_REFRESH_INTERVAL);
+ }
+
+ /**
+ * Create the volume tooltip DOM element
+ *
+ * @return {Element}
+ * The element that was created.
+ */
+ createEl() {
+ return super.createEl('div', {
+ className: 'vjs-volume-tooltip'
+ }, {
+ 'aria-hidden': 'true'
+ });
+ }
+
+ /**
+ * Updates the position of the tooltip relative to the `VolumeBar` and
+ * its content text.
+ *
+ * @param {Object} rangeBarRect
+ * The `ClientRect` for the {@link VolumeBar} element.
+ *
+ * @param {number} rangeBarPoint
+ * A number from 0 to 1, representing a horizontal/vertical reference point
+ * from the left edge of the {@link VolumeBar}
+ *
+ * @param {boolean} vertical
+ * Referees to the Volume control position
+ * in the control bar{@link VolumeControl}
+ *
+ */
+ update(rangeBarRect, rangeBarPoint, vertical, content) {
+ if (!vertical) {
+ const tooltipRect = getBoundingClientRect(this.el_);
+ const playerRect = getBoundingClientRect(this.player_.el());
+ const volumeBarPointPx = rangeBarRect.width * rangeBarPoint;
+ if (!playerRect || !tooltipRect) {
+ return;
+ }
+ const spaceLeftOfPoint = rangeBarRect.left - playerRect.left + volumeBarPointPx;
+ const spaceRightOfPoint = rangeBarRect.width - volumeBarPointPx + (playerRect.right - rangeBarRect.right);
+ let pullTooltipBy = tooltipRect.width / 2;
+ if (spaceLeftOfPoint < pullTooltipBy) {
+ pullTooltipBy += pullTooltipBy - spaceLeftOfPoint;
+ } else if (spaceRightOfPoint < pullTooltipBy) {
+ pullTooltipBy = spaceRightOfPoint;
+ }
+ if (pullTooltipBy < 0) {
+ pullTooltipBy = 0;
+ } else if (pullTooltipBy > tooltipRect.width) {
+ pullTooltipBy = tooltipRect.width;
+ }
+ this.el_.style.right = `-${pullTooltipBy}px`;
+ }
+ this.write(`${content}%`);
+ }
+
+ /**
+ * Write the volume to the tooltip DOM element.
+ *
+ * @param {string} content
+ * The formatted volume for the tooltip.
+ */
+ write(content) {
+ textContent(this.el_, content);
+ }
+
+ /**
+ * Updates the position of the volume tooltip relative to the `VolumeBar`.
+ *
+ * @param {Object} rangeBarRect
+ * The `ClientRect` for the {@link VolumeBar} element.
+ *
+ * @param {number} rangeBarPoint
+ * A number from 0 to 1, representing a horizontal/vertical reference point
+ * from the left edge of the {@link VolumeBar}
+ *
+ * @param {boolean} vertical
+ * Referees to the Volume control position
+ * in the control bar{@link VolumeControl}
+ *
+ * @param {number} volume
+ * The volume level to update the tooltip to
+ *
+ * @param {Function} cb
+ * A function that will be called during the request animation frame
+ * for tooltips that need to do additional animations from the default
+ */
+ updateVolume(rangeBarRect, rangeBarPoint, vertical, volume, cb) {
+ this.requestNamedAnimationFrame('VolumeLevelTooltip#updateVolume', () => {
+ this.update(rangeBarRect, rangeBarPoint, vertical, volume.toFixed(0));
+ if (cb) {
+ cb();
+ }
+ });
+ }
+ }
+ Component$1.registerComponent('VolumeLevelTooltip', VolumeLevelTooltip);
+
+ /**
+ * @file mouse-volume-level-display.js
+ */
+
+ /**
+ * The {@link MouseVolumeLevelDisplay} component tracks mouse movement over the
+ * {@link VolumeControl}. It displays an indicator and a {@link VolumeLevelTooltip}
+ * indicating the volume level which is represented by a given point in the
+ * {@link VolumeBar}.
+ *
+ * @extends Component
+ */
+ class MouseVolumeLevelDisplay extends Component$1 {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('../../player').default } player
+ * The {@link Player} that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ */
+ constructor(player, options) {
+ super(player, options);
+ this.update = throttle(bind_(this, this.update), UPDATE_REFRESH_INTERVAL);
+ }
+
+ /**
+ * Create the DOM element for this class.
+ *
+ * @return {Element}
+ * The element that was created.
+ */
+ createEl() {
+ return super.createEl('div', {
+ className: 'vjs-mouse-display'
+ });
+ }
+
+ /**
+ * Enquires updates to its own DOM as well as the DOM of its
+ * {@link VolumeLevelTooltip} child.
+ *
+ * @param {Object} rangeBarRect
+ * The `ClientRect` for the {@link VolumeBar} element.
+ *
+ * @param {number} rangeBarPoint
+ * A number from 0 to 1, representing a horizontal/vertical reference point
+ * from the left edge of the {@link VolumeBar}
+ *
+ * @param {boolean} vertical
+ * Referees to the Volume control position
+ * in the control bar{@link VolumeControl}
+ *
+ */
+ update(rangeBarRect, rangeBarPoint, vertical) {
+ const volume = 100 * rangeBarPoint;
+ this.getChild('volumeLevelTooltip').updateVolume(rangeBarRect, rangeBarPoint, vertical, volume, () => {
+ if (vertical) {
+ this.el_.style.bottom = `${rangeBarRect.height * rangeBarPoint}px`;
+ } else {
+ this.el_.style.left = `${rangeBarRect.width * rangeBarPoint}px`;
+ }
+ });
+ }
+ }
+
+ /**
+ * Default options for `MouseVolumeLevelDisplay`
+ *
+ * @type {Object}
+ * @private
+ */
+ MouseVolumeLevelDisplay.prototype.options_ = {
+ children: ['volumeLevelTooltip']
+ };
+ Component$1.registerComponent('MouseVolumeLevelDisplay', MouseVolumeLevelDisplay);
+
+ /**
+ * @file volume-bar.js
+ */
+
+ /**
+ * The bar that contains the volume level and can be clicked on to adjust the level
+ *
+ * @extends Slider
+ */
+ class VolumeBar extends Slider {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('../../player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ */
+ constructor(player, options) {
+ super(player, options);
+ this.on('slideractive', e => this.updateLastVolume_(e));
+ this.on(player, 'volumechange', e => this.updateARIAAttributes(e));
+ player.ready(() => this.updateARIAAttributes());
+ }
+
+ /**
+ * Create the `Component`'s DOM element
+ *
+ * @return {Element}
+ * The element that was created.
+ */
+ createEl() {
+ return super.createEl('div', {
+ className: 'vjs-volume-bar vjs-slider-bar'
+ }, {
+ 'aria-label': this.localize('Volume Level'),
+ 'aria-live': 'polite'
+ });
+ }
+
+ /**
+ * Handle mouse down on volume bar
+ *
+ * @param {Event} event
+ * The `mousedown` event that caused this to run.
+ *
+ * @listens mousedown
+ */
+ handleMouseDown(event) {
+ if (!isSingleLeftClick(event)) {
+ return;
+ }
+ super.handleMouseDown(event);
+ }
+
+ /**
+ * Handle movement events on the {@link VolumeMenuButton}.
+ *
+ * @param {Event} event
+ * The event that caused this function to run.
+ *
+ * @listens mousemove
+ */
+ handleMouseMove(event) {
+ const mouseVolumeLevelDisplay = this.getChild('mouseVolumeLevelDisplay');
+ if (mouseVolumeLevelDisplay) {
+ const volumeBarEl = this.el();
+ const volumeBarRect = getBoundingClientRect(volumeBarEl);
+ const vertical = this.vertical();
+ let volumeBarPoint = getPointerPosition(volumeBarEl, event);
+ volumeBarPoint = vertical ? volumeBarPoint.y : volumeBarPoint.x;
+ // The default skin has a gap on either side of the `VolumeBar`. This means
+ // that it's possible to trigger this behavior outside the boundaries of
+ // the `VolumeBar`. This ensures we stay within it at all times.
+ volumeBarPoint = clamp(volumeBarPoint, 0, 1);
+ mouseVolumeLevelDisplay.update(volumeBarRect, volumeBarPoint, vertical);
+ }
+ if (!isSingleLeftClick(event)) {
+ return;
+ }
+ this.checkMuted();
+ this.player_.volume(this.calculateDistance(event));
+ }
+
+ /**
+ * If the player is muted unmute it.
+ */
+ checkMuted() {
+ if (this.player_.muted()) {
+ this.player_.muted(false);
+ }
+ }
+
+ /**
+ * Get percent of volume level
+ *
+ * @return {number}
+ * Volume level percent as a decimal number.
+ */
+ getPercent() {
+ if (this.player_.muted()) {
+ return 0;
+ }
+ return this.player_.volume();
+ }
+
+ /**
+ * Increase volume level for keyboard users
+ */
+ stepForward() {
+ this.checkMuted();
+ this.player_.volume(this.player_.volume() + 0.1);
+ }
+
+ /**
+ * Decrease volume level for keyboard users
+ */
+ stepBack() {
+ this.checkMuted();
+ this.player_.volume(this.player_.volume() - 0.1);
+ }
+
+ /**
+ * Update ARIA accessibility attributes
+ *
+ * @param {Event} [event]
+ * The `volumechange` event that caused this function to run.
+ *
+ * @listens Player#volumechange
+ */
+ updateARIAAttributes(event) {
+ const ariaValue = this.player_.muted() ? 0 : this.volumeAsPercentage_();
+ this.el_.setAttribute('aria-valuenow', ariaValue);
+ this.el_.setAttribute('aria-valuetext', ariaValue + '%');
+ }
+
+ /**
+ * Returns the current value of the player volume as a percentage
+ *
+ * @private
+ */
+ volumeAsPercentage_() {
+ return Math.round(this.player_.volume() * 100);
+ }
+
+ /**
+ * When user starts dragging the VolumeBar, store the volume and listen for
+ * the end of the drag. When the drag ends, if the volume was set to zero,
+ * set lastVolume to the stored volume.
+ *
+ * @listens slideractive
+ * @private
+ */
+ updateLastVolume_() {
+ const volumeBeforeDrag = this.player_.volume();
+ this.one('sliderinactive', () => {
+ if (this.player_.volume() === 0) {
+ this.player_.lastVolume_(volumeBeforeDrag);
+ }
+ });
+ }
+ }
+
+ /**
+ * Default options for the `VolumeBar`
+ *
+ * @type {Object}
+ * @private
+ */
+ VolumeBar.prototype.options_ = {
+ children: ['volumeLevel'],
+ barName: 'volumeLevel'
+ };
+
+ // MouseVolumeLevelDisplay tooltip should not be added to a player on mobile devices
+ if (!IS_IOS && !IS_ANDROID) {
+ VolumeBar.prototype.options_.children.splice(0, 0, 'mouseVolumeLevelDisplay');
+ }
+
+ /**
+ * Call the update event for this Slider when this event happens on the player.
+ *
+ * @type {string}
+ */
+ VolumeBar.prototype.playerEvent = 'volumechange';
+ Component$1.registerComponent('VolumeBar', VolumeBar);
+
+ /**
+ * @file volume-control.js
+ */
+
+ /**
+ * The component for controlling the volume level
+ *
+ * @extends Component
+ */
+ class VolumeControl extends Component$1 {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('../../player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options={}]
+ * The key/value store of player options.
+ */
+ constructor(player, options = {}) {
+ options.vertical = options.vertical || false;
+
+ // Pass the vertical option down to the VolumeBar if
+ // the VolumeBar is turned on.
+ if (typeof options.volumeBar === 'undefined' || isPlain(options.volumeBar)) {
+ options.volumeBar = options.volumeBar || {};
+ options.volumeBar.vertical = options.vertical;
+ }
+ super(player, options);
+
+ // hide this control if volume support is missing
+ checkVolumeSupport(this, player);
+ this.throttledHandleMouseMove = throttle(bind_(this, this.handleMouseMove), UPDATE_REFRESH_INTERVAL);
+ this.handleMouseUpHandler_ = e => this.handleMouseUp(e);
+ this.on('mousedown', e => this.handleMouseDown(e));
+ this.on('touchstart', e => this.handleMouseDown(e));
+ this.on('mousemove', e => this.handleMouseMove(e));
+
+ // while the slider is active (the mouse has been pressed down and
+ // is dragging) or in focus we do not want to hide the VolumeBar
+ this.on(this.volumeBar, ['focus', 'slideractive'], () => {
+ this.volumeBar.addClass('vjs-slider-active');
+ this.addClass('vjs-slider-active');
+ this.trigger('slideractive');
+ });
+ this.on(this.volumeBar, ['blur', 'sliderinactive'], () => {
+ this.volumeBar.removeClass('vjs-slider-active');
+ this.removeClass('vjs-slider-active');
+ this.trigger('sliderinactive');
+ });
+ }
+
+ /**
+ * Create the `Component`'s DOM element
+ *
+ * @return {Element}
+ * The element that was created.
+ */
+ createEl() {
+ let orientationClass = 'vjs-volume-horizontal';
+ if (this.options_.vertical) {
+ orientationClass = 'vjs-volume-vertical';
+ }
+ return super.createEl('div', {
+ className: `vjs-volume-control vjs-control ${orientationClass}`
+ });
+ }
+
+ /**
+ * Handle `mousedown` or `touchstart` events on the `VolumeControl`.
+ *
+ * @param {Event} event
+ * `mousedown` or `touchstart` event that triggered this function
+ *
+ * @listens mousedown
+ * @listens touchstart
+ */
+ handleMouseDown(event) {
+ const doc = this.el_.ownerDocument;
+ this.on(doc, 'mousemove', this.throttledHandleMouseMove);
+ this.on(doc, 'touchmove', this.throttledHandleMouseMove);
+ this.on(doc, 'mouseup', this.handleMouseUpHandler_);
+ this.on(doc, 'touchend', this.handleMouseUpHandler_);
+ }
+
+ /**
+ * Handle `mouseup` or `touchend` events on the `VolumeControl`.
+ *
+ * @param {Event} event
+ * `mouseup` or `touchend` event that triggered this function.
+ *
+ * @listens touchend
+ * @listens mouseup
+ */
+ handleMouseUp(event) {
+ const doc = this.el_.ownerDocument;
+ this.off(doc, 'mousemove', this.throttledHandleMouseMove);
+ this.off(doc, 'touchmove', this.throttledHandleMouseMove);
+ this.off(doc, 'mouseup', this.handleMouseUpHandler_);
+ this.off(doc, 'touchend', this.handleMouseUpHandler_);
+ }
+
+ /**
+ * Handle `mousedown` or `touchstart` events on the `VolumeControl`.
+ *
+ * @param {Event} event
+ * `mousedown` or `touchstart` event that triggered this function
+ *
+ * @listens mousedown
+ * @listens touchstart
+ */
+ handleMouseMove(event) {
+ this.volumeBar.handleMouseMove(event);
+ }
+ }
+
+ /**
+ * Default options for the `VolumeControl`
+ *
+ * @type {Object}
+ * @private
+ */
+ VolumeControl.prototype.options_ = {
+ children: ['volumeBar']
+ };
+ Component$1.registerComponent('VolumeControl', VolumeControl);
+
+ /**
+ * Check if muting volume is supported and if it isn't hide the mute toggle
+ * button.
+ *
+ * @param { import('../../component').default } self
+ * A reference to the mute toggle button
+ *
+ * @param { import('../../player').default } player
+ * A reference to the player
+ *
+ * @private
+ */
+ const checkMuteSupport = function (self, player) {
+ // hide mute toggle button if it's not supported by the current tech
+ if (player.tech_ && !player.tech_.featuresMuteControl) {
+ self.addClass('vjs-hidden');
+ }
+ self.on(player, 'loadstart', function () {
+ if (!player.tech_.featuresMuteControl) {
+ self.addClass('vjs-hidden');
+ } else {
+ self.removeClass('vjs-hidden');
+ }
+ });
+ };
+
+ /**
+ * @file mute-toggle.js
+ */
+
+ /**
+ * A button component for muting the audio.
+ *
+ * @extends Button
+ */
+ class MuteToggle extends Button {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('./player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ */
+ constructor(player, options) {
+ super(player, options);
+
+ // hide this control if volume support is missing
+ checkMuteSupport(this, player);
+ this.on(player, ['loadstart', 'volumechange'], e => this.update(e));
+ }
+
+ /**
+ * Builds the default DOM `className`.
+ *
+ * @return {string}
+ * The DOM `className` for this object.
+ */
+ buildCSSClass() {
+ return `vjs-mute-control ${super.buildCSSClass()}`;
+ }
+
+ /**
+ * This gets called when an `MuteToggle` is "clicked". See
+ * {@link ClickableComponent} for more detailed information on what a click can be.
+ *
+ * @param {Event} [event]
+ * The `keydown`, `tap`, or `click` event that caused this function to be
+ * called.
+ *
+ * @listens tap
+ * @listens click
+ */
+ handleClick(event) {
+ const vol = this.player_.volume();
+ const lastVolume = this.player_.lastVolume_();
+ if (vol === 0) {
+ const volumeToSet = lastVolume < 0.1 ? 0.1 : lastVolume;
+ this.player_.volume(volumeToSet);
+ this.player_.muted(false);
+ } else {
+ this.player_.muted(this.player_.muted() ? false : true);
+ }
+ }
+
+ /**
+ * Update the `MuteToggle` button based on the state of `volume` and `muted`
+ * on the player.
+ *
+ * @param {Event} [event]
+ * The {@link Player#loadstart} event if this function was called
+ * through an event.
+ *
+ * @listens Player#loadstart
+ * @listens Player#volumechange
+ */
+ update(event) {
+ this.updateIcon_();
+ this.updateControlText_();
+ }
+
+ /**
+ * Update the appearance of the `MuteToggle` icon.
+ *
+ * Possible states (given `level` variable below):
+ * - 0: crossed out
+ * - 1: zero bars of volume
+ * - 2: one bar of volume
+ * - 3: two bars of volume
+ *
+ * @private
+ */
+ updateIcon_() {
+ const vol = this.player_.volume();
+ let level = 3;
+ this.setIcon('volume-high');
+
+ // in iOS when a player is loaded with muted attribute
+ // and volume is changed with a native mute button
+ // we want to make sure muted state is updated
+ if (IS_IOS && this.player_.tech_ && this.player_.tech_.el_) {
+ this.player_.muted(this.player_.tech_.el_.muted);
+ }
+ if (vol === 0 || this.player_.muted()) {
+ this.setIcon('volume-mute');
+ level = 0;
+ } else if (vol < 0.33) {
+ this.setIcon('volume-low');
+ level = 1;
+ } else if (vol < 0.67) {
+ this.setIcon('volume-medium');
+ level = 2;
+ }
+ removeClass(this.el_, [0, 1, 2, 3].reduce((str, i) => str + `${i ? ' ' : ''}vjs-vol-${i}`, ''));
+ addClass(this.el_, `vjs-vol-${level}`);
+ }
+
+ /**
+ * If `muted` has changed on the player, update the control text
+ * (`title` attribute on `vjs-mute-control` element and content of
+ * `vjs-control-text` element).
+ *
+ * @private
+ */
+ updateControlText_() {
+ const soundOff = this.player_.muted() || this.player_.volume() === 0;
+ const text = soundOff ? 'Unmute' : 'Mute';
+ if (this.controlText() !== text) {
+ this.controlText(text);
+ }
+ }
+ }
+
+ /**
+ * The text that should display over the `MuteToggle`s controls. Added for localization.
+ *
+ * @type {string}
+ * @protected
+ */
+ MuteToggle.prototype.controlText_ = 'Mute';
+ Component$1.registerComponent('MuteToggle', MuteToggle);
+
+ /**
+ * @file volume-control.js
+ */
+
+ /**
+ * A Component to contain the MuteToggle and VolumeControl so that
+ * they can work together.
+ *
+ * @extends Component
+ */
+ class VolumePanel extends Component$1 {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('./player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options={}]
+ * The key/value store of player options.
+ */
+ constructor(player, options = {}) {
+ if (typeof options.inline !== 'undefined') {
+ options.inline = options.inline;
+ } else {
+ options.inline = true;
+ }
+
+ // pass the inline option down to the VolumeControl as vertical if
+ // the VolumeControl is on.
+ if (typeof options.volumeControl === 'undefined' || isPlain(options.volumeControl)) {
+ options.volumeControl = options.volumeControl || {};
+ options.volumeControl.vertical = !options.inline;
+ }
+ super(player, options);
+
+ // this handler is used by mouse handler methods below
+ this.handleKeyPressHandler_ = e => this.handleKeyPress(e);
+ this.on(player, ['loadstart'], e => this.volumePanelState_(e));
+ this.on(this.muteToggle, 'keyup', e => this.handleKeyPress(e));
+ this.on(this.volumeControl, 'keyup', e => this.handleVolumeControlKeyUp(e));
+ this.on('keydown', e => this.handleKeyPress(e));
+ this.on('mouseover', e => this.handleMouseOver(e));
+ this.on('mouseout', e => this.handleMouseOut(e));
+
+ // while the slider is active (the mouse has been pressed down and
+ // is dragging) we do not want to hide the VolumeBar
+ this.on(this.volumeControl, ['slideractive'], this.sliderActive_);
+ this.on(this.volumeControl, ['sliderinactive'], this.sliderInactive_);
+ }
+
+ /**
+ * Add vjs-slider-active class to the VolumePanel
+ *
+ * @listens VolumeControl#slideractive
+ * @private
+ */
+ sliderActive_() {
+ this.addClass('vjs-slider-active');
+ }
+
+ /**
+ * Removes vjs-slider-active class to the VolumePanel
+ *
+ * @listens VolumeControl#sliderinactive
+ * @private
+ */
+ sliderInactive_() {
+ this.removeClass('vjs-slider-active');
+ }
+
+ /**
+ * Adds vjs-hidden or vjs-mute-toggle-only to the VolumePanel
+ * depending on MuteToggle and VolumeControl state
+ *
+ * @listens Player#loadstart
+ * @private
+ */
+ volumePanelState_() {
+ // hide volume panel if neither volume control or mute toggle
+ // are displayed
+ if (this.volumeControl.hasClass('vjs-hidden') && this.muteToggle.hasClass('vjs-hidden')) {
+ this.addClass('vjs-hidden');
+ }
+
+ // if only mute toggle is visible we don't want
+ // volume panel expanding when hovered or active
+ if (this.volumeControl.hasClass('vjs-hidden') && !this.muteToggle.hasClass('vjs-hidden')) {
+ this.addClass('vjs-mute-toggle-only');
+ }
+ }
+
+ /**
+ * Create the `Component`'s DOM element
+ *
+ * @return {Element}
+ * The element that was created.
+ */
+ createEl() {
+ let orientationClass = 'vjs-volume-panel-horizontal';
+ if (!this.options_.inline) {
+ orientationClass = 'vjs-volume-panel-vertical';
+ }
+ return super.createEl('div', {
+ className: `vjs-volume-panel vjs-control ${orientationClass}`
+ });
+ }
+
+ /**
+ * Dispose of the `volume-panel` and all child components.
+ */
+ dispose() {
+ this.handleMouseOut();
+ super.dispose();
+ }
+
+ /**
+ * Handles `keyup` events on the `VolumeControl`, looking for ESC, which closes
+ * the volume panel and sets focus on `MuteToggle`.
+ *
+ * @param {Event} event
+ * The `keyup` event that caused this function to be called.
+ *
+ * @listens keyup
+ */
+ handleVolumeControlKeyUp(event) {
+ if (keycode.isEventKey(event, 'Esc')) {
+ this.muteToggle.focus();
+ }
+ }
+
+ /**
+ * This gets called when a `VolumePanel` gains hover via a `mouseover` event.
+ * Turns on listening for `mouseover` event. When they happen it
+ * calls `this.handleMouseOver`.
+ *
+ * @param {Event} event
+ * The `mouseover` event that caused this function to be called.
+ *
+ * @listens mouseover
+ */
+ handleMouseOver(event) {
+ this.addClass('vjs-hover');
+ on(document, 'keyup', this.handleKeyPressHandler_);
+ }
+
+ /**
+ * This gets called when a `VolumePanel` gains hover via a `mouseout` event.
+ * Turns on listening for `mouseout` event. When they happen it
+ * calls `this.handleMouseOut`.
+ *
+ * @param {Event} event
+ * The `mouseout` event that caused this function to be called.
+ *
+ * @listens mouseout
+ */
+ handleMouseOut(event) {
+ this.removeClass('vjs-hover');
+ off(document, 'keyup', this.handleKeyPressHandler_);
+ }
+
+ /**
+ * Handles `keyup` event on the document or `keydown` event on the `VolumePanel`,
+ * looking for ESC, which hides the `VolumeControl`.
+ *
+ * @param {Event} event
+ * The keypress that triggered this event.
+ *
+ * @listens keydown | keyup
+ */
+ handleKeyPress(event) {
+ if (keycode.isEventKey(event, 'Esc')) {
+ this.handleMouseOut();
+ }
+ }
+ }
+
+ /**
+ * Default options for the `VolumeControl`
+ *
+ * @type {Object}
+ * @private
+ */
+ VolumePanel.prototype.options_ = {
+ children: ['muteToggle', 'volumeControl']
+ };
+ Component$1.registerComponent('VolumePanel', VolumePanel);
+
+ /**
+ * Button to skip forward a configurable amount of time
+ * through a video. Renders in the control bar.
+ *
+ * e.g. options: {controlBar: {skipButtons: forward: 5}}
+ *
+ * @extends Button
+ */
+ class SkipForward extends Button {
+ constructor(player, options) {
+ super(player, options);
+ this.validOptions = [5, 10, 30];
+ this.skipTime = this.getSkipForwardTime();
+ if (this.skipTime && this.validOptions.includes(this.skipTime)) {
+ this.setIcon(`forward-${this.skipTime}`);
+ this.controlText(this.localize('Skip forward {1} seconds', [this.skipTime.toLocaleString(player.language())]));
+ this.show();
+ } else {
+ this.hide();
+ }
+ }
+ getSkipForwardTime() {
+ const playerOptions = this.options_.playerOptions;
+ return playerOptions.controlBar && playerOptions.controlBar.skipButtons && playerOptions.controlBar.skipButtons.forward;
+ }
+ buildCSSClass() {
+ return `vjs-skip-forward-${this.getSkipForwardTime()} ${super.buildCSSClass()}`;
+ }
+
+ /**
+ * On click, skips forward in the duration/seekable range by a configurable amount of seconds.
+ * If the time left in the duration/seekable range is less than the configured 'skip forward' time,
+ * skips to end of duration/seekable range.
+ *
+ * Handle a click on a `SkipForward` button
+ *
+ * @param {EventTarget~Event} event
+ * The `click` event that caused this function
+ * to be called
+ */
+ handleClick(event) {
+ if (isNaN(this.player_.duration())) {
+ return;
+ }
+ const currentVideoTime = this.player_.currentTime();
+ const liveTracker = this.player_.liveTracker;
+ const duration = liveTracker && liveTracker.isLive() ? liveTracker.seekableEnd() : this.player_.duration();
+ let newTime;
+ if (currentVideoTime + this.skipTime <= duration) {
+ newTime = currentVideoTime + this.skipTime;
+ } else {
+ newTime = duration;
+ }
+ this.player_.currentTime(newTime);
+ }
+
+ /**
+ * Update control text on languagechange
+ */
+ handleLanguagechange() {
+ this.controlText(this.localize('Skip forward {1} seconds', [this.skipTime]));
+ }
+ }
+ SkipForward.prototype.controlText_ = 'Skip Forward';
+ Component$1.registerComponent('SkipForward', SkipForward);
+
+ /**
+ * Button to skip backward a configurable amount of time
+ * through a video. Renders in the control bar.
+ *
+ * * e.g. options: {controlBar: {skipButtons: backward: 5}}
+ *
+ * @extends Button
+ */
+ class SkipBackward extends Button {
+ constructor(player, options) {
+ super(player, options);
+ this.validOptions = [5, 10, 30];
+ this.skipTime = this.getSkipBackwardTime();
+ if (this.skipTime && this.validOptions.includes(this.skipTime)) {
+ this.setIcon(`replay-${this.skipTime}`);
+ this.controlText(this.localize('Skip backward {1} seconds', [this.skipTime.toLocaleString(player.language())]));
+ this.show();
+ } else {
+ this.hide();
+ }
+ }
+ getSkipBackwardTime() {
+ const playerOptions = this.options_.playerOptions;
+ return playerOptions.controlBar && playerOptions.controlBar.skipButtons && playerOptions.controlBar.skipButtons.backward;
+ }
+ buildCSSClass() {
+ return `vjs-skip-backward-${this.getSkipBackwardTime()} ${super.buildCSSClass()}`;
+ }
+
+ /**
+ * On click, skips backward in the video by a configurable amount of seconds.
+ * If the current time in the video is less than the configured 'skip backward' time,
+ * skips to beginning of video or seekable range.
+ *
+ * Handle a click on a `SkipBackward` button
+ *
+ * @param {EventTarget~Event} event
+ * The `click` event that caused this function
+ * to be called
+ */
+ handleClick(event) {
+ const currentVideoTime = this.player_.currentTime();
+ const liveTracker = this.player_.liveTracker;
+ const seekableStart = liveTracker && liveTracker.isLive() && liveTracker.seekableStart();
+ let newTime;
+ if (seekableStart && currentVideoTime - this.skipTime <= seekableStart) {
+ newTime = seekableStart;
+ } else if (currentVideoTime >= this.skipTime) {
+ newTime = currentVideoTime - this.skipTime;
+ } else {
+ newTime = 0;
+ }
+ this.player_.currentTime(newTime);
+ }
+
+ /**
+ * Update control text on languagechange
+ */
+ handleLanguagechange() {
+ this.controlText(this.localize('Skip backward {1} seconds', [this.skipTime]));
+ }
+ }
+ SkipBackward.prototype.controlText_ = 'Skip Backward';
+ Component$1.registerComponent('SkipBackward', SkipBackward);
+
+ /**
+ * @file menu.js
+ */
+
+ /**
+ * The Menu component is used to build popup menus, including subtitle and
+ * captions selection menus.
+ *
+ * @extends Component
+ */
+ class Menu extends Component$1 {
+ /**
+ * Create an instance of this class.
+ *
+ * @param { import('../player').default } player
+ * the player that this component should attach to
+ *
+ * @param {Object} [options]
+ * Object of option names and values
+ *
+ */
+ constructor(player, options) {
+ super(player, options);
+ if (options) {
+ this.menuButton_ = options.menuButton;
+ }
+ this.focusedChild_ = -1;
+ this.on('keydown', e => this.handleKeyDown(e));
+
+ // All the menu item instances share the same blur handler provided by the menu container.
+ this.boundHandleBlur_ = e => this.handleBlur(e);
+ this.boundHandleTapClick_ = e => this.handleTapClick(e);
+ }
+
+ /**
+ * Add event listeners to the {@link MenuItem}.
+ *
+ * @param {Object} component
+ * The instance of the `MenuItem` to add listeners to.
+ *
+ */
+ addEventListenerForItem(component) {
+ if (!(component instanceof Component$1)) {
+ return;
+ }
+ this.on(component, 'blur', this.boundHandleBlur_);
+ this.on(component, ['tap', 'click'], this.boundHandleTapClick_);
+ }
+
+ /**
+ * Remove event listeners from the {@link MenuItem}.
+ *
+ * @param {Object} component
+ * The instance of the `MenuItem` to remove listeners.
+ *
+ */
+ removeEventListenerForItem(component) {
+ if (!(component instanceof Component$1)) {
+ return;
+ }
+ this.off(component, 'blur', this.boundHandleBlur_);
+ this.off(component, ['tap', 'click'], this.boundHandleTapClick_);
+ }
+
+ /**
+ * This method will be called indirectly when the component has been added
+ * before the component adds to the new menu instance by `addItem`.
+ * In this case, the original menu instance will remove the component
+ * by calling `removeChild`.
+ *
+ * @param {Object} component
+ * The instance of the `MenuItem`
+ */
+ removeChild(component) {
+ if (typeof component === 'string') {
+ component = this.getChild(component);
+ }
+ this.removeEventListenerForItem(component);
+ super.removeChild(component);
+ }
+
+ /**
+ * Add a {@link MenuItem} to the menu.
+ *
+ * @param {Object|string} component
+ * The name or instance of the `MenuItem` to add.
+ *
+ */
+ addItem(component) {
+ const childComponent = this.addChild(component);
+ if (childComponent) {
+ this.addEventListenerForItem(childComponent);
+ }
+ }
+
+ /**
+ * Create the `Menu`s DOM element.
+ *
+ * @return {Element}
+ * the element that was created
+ */
+ createEl() {
+ const contentElType = this.options_.contentElType || 'ul';
+ this.contentEl_ = createEl(contentElType, {
+ className: 'vjs-menu-content'
+ });
+ this.contentEl_.setAttribute('role', 'menu');
+ const el = super.createEl('div', {
+ append: this.contentEl_,
+ className: 'vjs-menu'
+ });
+ el.appendChild(this.contentEl_);
+
+ // Prevent clicks from bubbling up. Needed for Menu Buttons,
+ // where a click on the parent is significant
+ on(el, 'click', function (event) {
+ event.preventDefault();
+ event.stopImmediatePropagation();
+ });
+ return el;
+ }
+ dispose() {
+ this.contentEl_ = null;
+ this.boundHandleBlur_ = null;
+ this.boundHandleTapClick_ = null;
+ super.dispose();
+ }
+
+ /**
+ * Called when a `MenuItem` loses focus.
+ *
+ * @param {Event} event
+ * The `blur` event that caused this function to be called.
+ *
+ * @listens blur
+ */
+ handleBlur(event) {
+ const relatedTarget = event.relatedTarget || document.activeElement;
+
+ // Close menu popup when a user clicks outside the menu
+ if (!this.children().some(element => {
+ return element.el() === relatedTarget;
+ })) {
+ const btn = this.menuButton_;
+ if (btn && btn.buttonPressed_ && relatedTarget !== btn.el().firstChild) {
+ btn.unpressButton();
+ }
+ }
+ }
+
+ /**
+ * Called when a `MenuItem` gets clicked or tapped.
+ *
+ * @param {Event} event
+ * The `click` or `tap` event that caused this function to be called.
+ *
+ * @listens click,tap
+ */
+ handleTapClick(event) {
+ // Unpress the associated MenuButton, and move focus back to it
+ if (this.menuButton_) {
+ this.menuButton_.unpressButton();
+ const childComponents = this.children();
+ if (!Array.isArray(childComponents)) {
+ return;
+ }
+ const foundComponent = childComponents.filter(component => component.el() === event.target)[0];
+ if (!foundComponent) {
+ return;
+ }
+
+ // don't focus menu button if item is a caption settings item
+ // because focus will move elsewhere
+ if (foundComponent.name() !== 'CaptionSettingsMenuItem') {
+ this.menuButton_.focus();
+ }
+ }
+ }
+
+ /**
+ * Handle a `keydown` event on this menu. This listener is added in the constructor.
+ *
+ * @param {KeyboardEvent} event
+ * A `keydown` event that happened on the menu.
+ *
+ * @listens keydown
+ */
+ handleKeyDown(event) {
+ // Left and Down Arrows
+ if (keycode.isEventKey(event, 'Left') || keycode.isEventKey(event, 'Down')) {
+ event.preventDefault();
+ event.stopPropagation();
+ this.stepForward();
+
+ // Up and Right Arrows
+ } else if (keycode.isEventKey(event, 'Right') || keycode.isEventKey(event, 'Up')) {
+ event.preventDefault();
+ event.stopPropagation();
+ this.stepBack();
+ }
+ }
+
+ /**
+ * Move to next (lower) menu item for keyboard users.
+ */
+ stepForward() {
+ let stepChild = 0;
+ if (this.focusedChild_ !== undefined) {
+ stepChild = this.focusedChild_ + 1;
+ }
+ this.focus(stepChild);
+ }
+
+ /**
+ * Move to previous (higher) menu item for keyboard users.
+ */
+ stepBack() {
+ let stepChild = 0;
+ if (this.focusedChild_ !== undefined) {
+ stepChild = this.focusedChild_ - 1;
+ }
+ this.focus(stepChild);
+ }
+
+ /**
+ * Set focus on a {@link MenuItem} in the `Menu`.
+ *
+ * @param {Object|string} [item=0]
+ * Index of child item set focus on.
+ */
+ focus(item = 0) {
+ const children = this.children().slice();
+ const haveTitle = children.length && children[0].hasClass('vjs-menu-title');
+ if (haveTitle) {
+ children.shift();
+ }
+ if (children.length > 0) {
+ if (item < 0) {
+ item = 0;
+ } else if (item >= children.length) {
+ item = children.length - 1;
+ }
+ this.focusedChild_ = item;
+ children[item].el_.focus();
+ }
+ }
+ }
+ Component$1.registerComponent('Menu', Menu);
+
+ /**
+ * @file menu-button.js
+ */
+
+ /**
+ * A `MenuButton` class for any popup {@link Menu}.
+ *
+ * @extends Component
+ */
+ class MenuButton extends Component$1 {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('../player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options={}]
+ * The key/value store of player options.
+ */
+ constructor(player, options = {}) {
+ super(player, options);
+ this.menuButton_ = new Button(player, options);
+ this.menuButton_.controlText(this.controlText_);
+ this.menuButton_.el_.setAttribute('aria-haspopup', 'true');
+
+ // Add buildCSSClass values to the button, not the wrapper
+ const buttonClass = Button.prototype.buildCSSClass();
+ this.menuButton_.el_.className = this.buildCSSClass() + ' ' + buttonClass;
+ this.menuButton_.removeClass('vjs-control');
+ this.addChild(this.menuButton_);
+ this.update();
+ this.enabled_ = true;
+ const handleClick = e => this.handleClick(e);
+ this.handleMenuKeyUp_ = e => this.handleMenuKeyUp(e);
+ this.on(this.menuButton_, 'tap', handleClick);
+ this.on(this.menuButton_, 'click', handleClick);
+ this.on(this.menuButton_, 'keydown', e => this.handleKeyDown(e));
+ this.on(this.menuButton_, 'mouseenter', () => {
+ this.addClass('vjs-hover');
+ this.menu.show();
+ on(document, 'keyup', this.handleMenuKeyUp_);
+ });
+ this.on('mouseleave', e => this.handleMouseLeave(e));
+ this.on('keydown', e => this.handleSubmenuKeyDown(e));
+ }
+
+ /**
+ * Update the menu based on the current state of its items.
+ */
+ update() {
+ const menu = this.createMenu();
+ if (this.menu) {
+ this.menu.dispose();
+ this.removeChild(this.menu);
+ }
+ this.menu = menu;
+ this.addChild(menu);
+
+ /**
+ * Track the state of the menu button
+ *
+ * @type {Boolean}
+ * @private
+ */
+ this.buttonPressed_ = false;
+ this.menuButton_.el_.setAttribute('aria-expanded', 'false');
+ if (this.items && this.items.length <= this.hideThreshold_) {
+ this.hide();
+ this.menu.contentEl_.removeAttribute('role');
+ } else {
+ this.show();
+ this.menu.contentEl_.setAttribute('role', 'menu');
+ }
+ }
+
+ /**
+ * Create the menu and add all items to it.
+ *
+ * @return {Menu}
+ * The constructed menu
+ */
+ createMenu() {
+ const menu = new Menu(this.player_, {
+ menuButton: this
+ });
+
+ /**
+ * Hide the menu if the number of items is less than or equal to this threshold. This defaults
+ * to 0 and whenever we add items which can be hidden to the menu we'll increment it. We list
+ * it here because every time we run `createMenu` we need to reset the value.
+ *
+ * @protected
+ * @type {Number}
+ */
+ this.hideThreshold_ = 0;
+
+ // Add a title list item to the top
+ if (this.options_.title) {
+ const titleEl = createEl('li', {
+ className: 'vjs-menu-title',
+ textContent: toTitleCase$1(this.options_.title),
+ tabIndex: -1
+ });
+ const titleComponent = new Component$1(this.player_, {
+ el: titleEl
+ });
+ menu.addItem(titleComponent);
+ }
+ this.items = this.createItems();
+ if (this.items) {
+ // Add menu items to the menu
+ for (let i = 0; i < this.items.length; i++) {
+ menu.addItem(this.items[i]);
+ }
+ }
+ return menu;
+ }
+
+ /**
+ * Create the list of menu items. Specific to each subclass.
+ *
+ * @abstract
+ */
+ createItems() {}
+
+ /**
+ * Create the `MenuButtons`s DOM element.
+ *
+ * @return {Element}
+ * The element that gets created.
+ */
+ createEl() {
+ return super.createEl('div', {
+ className: this.buildWrapperCSSClass()
+ }, {});
+ }
+
+ /**
+ * Overwrites the `setIcon` method from `Component`.
+ * In this case, we want the icon to be appended to the menuButton.
+ *
+ * @param {string} name
+ * The icon name to be added.
+ */
+ setIcon(name) {
+ super.setIcon(name, this.menuButton_.el_);
+ }
+
+ /**
+ * Allow sub components to stack CSS class names for the wrapper element
+ *
+ * @return {string}
+ * The constructed wrapper DOM `className`
+ */
+ buildWrapperCSSClass() {
+ let menuButtonClass = 'vjs-menu-button';
+
+ // If the inline option is passed, we want to use different styles altogether.
+ if (this.options_.inline === true) {
+ menuButtonClass += '-inline';
+ } else {
+ menuButtonClass += '-popup';
+ }
+
+ // TODO: Fix the CSS so that this isn't necessary
+ const buttonClass = Button.prototype.buildCSSClass();
+ return `vjs-menu-button ${menuButtonClass} ${buttonClass} ${super.buildCSSClass()}`;
+ }
+
+ /**
+ * Builds the default DOM `className`.
+ *
+ * @return {string}
+ * The DOM `className` for this object.
+ */
+ buildCSSClass() {
+ let menuButtonClass = 'vjs-menu-button';
+
+ // If the inline option is passed, we want to use different styles altogether.
+ if (this.options_.inline === true) {
+ menuButtonClass += '-inline';
+ } else {
+ menuButtonClass += '-popup';
+ }
+ return `vjs-menu-button ${menuButtonClass} ${super.buildCSSClass()}`;
+ }
+
+ /**
+ * Get or set the localized control text that will be used for accessibility.
+ *
+ * > NOTE: This will come from the internal `menuButton_` element.
+ *
+ * @param {string} [text]
+ * Control text for element.
+ *
+ * @param {Element} [el=this.menuButton_.el()]
+ * Element to set the title on.
+ *
+ * @return {string}
+ * - The control text when getting
+ */
+ controlText(text, el = this.menuButton_.el()) {
+ return this.menuButton_.controlText(text, el);
+ }
+
+ /**
+ * Dispose of the `menu-button` and all child components.
+ */
+ dispose() {
+ this.handleMouseLeave();
+ super.dispose();
+ }
+
+ /**
+ * Handle a click on a `MenuButton`.
+ * See {@link ClickableComponent#handleClick} for instances where this is called.
+ *
+ * @param {Event} event
+ * The `keydown`, `tap`, or `click` event that caused this function to be
+ * called.
+ *
+ * @listens tap
+ * @listens click
+ */
+ handleClick(event) {
+ if (this.buttonPressed_) {
+ this.unpressButton();
+ } else {
+ this.pressButton();
+ }
+ }
+
+ /**
+ * Handle `mouseleave` for `MenuButton`.
+ *
+ * @param {Event} event
+ * The `mouseleave` event that caused this function to be called.
+ *
+ * @listens mouseleave
+ */
+ handleMouseLeave(event) {
+ this.removeClass('vjs-hover');
+ off(document, 'keyup', this.handleMenuKeyUp_);
+ }
+
+ /**
+ * Set the focus to the actual button, not to this element
+ */
+ focus() {
+ this.menuButton_.focus();
+ }
+
+ /**
+ * Remove the focus from the actual button, not this element
+ */
+ blur() {
+ this.menuButton_.blur();
+ }
+
+ /**
+ * Handle tab, escape, down arrow, and up arrow keys for `MenuButton`. See
+ * {@link ClickableComponent#handleKeyDown} for instances where this is called.
+ *
+ * @param {Event} event
+ * The `keydown` event that caused this function to be called.
+ *
+ * @listens keydown
+ */
+ handleKeyDown(event) {
+ // Escape or Tab unpress the 'button'
+ if (keycode.isEventKey(event, 'Esc') || keycode.isEventKey(event, 'Tab')) {
+ if (this.buttonPressed_) {
+ this.unpressButton();
+ }
+
+ // Don't preventDefault for Tab key - we still want to lose focus
+ if (!keycode.isEventKey(event, 'Tab')) {
+ event.preventDefault();
+ // Set focus back to the menu button's button
+ this.menuButton_.focus();
+ }
+ // Up Arrow or Down Arrow also 'press' the button to open the menu
+ } else if (keycode.isEventKey(event, 'Up') || keycode.isEventKey(event, 'Down')) {
+ if (!this.buttonPressed_) {
+ event.preventDefault();
+ this.pressButton();
+ }
+ }
+ }
+
+ /**
+ * Handle a `keyup` event on a `MenuButton`. The listener for this is added in
+ * the constructor.
+ *
+ * @param {Event} event
+ * Key press event
+ *
+ * @listens keyup
+ */
+ handleMenuKeyUp(event) {
+ // Escape hides popup menu
+ if (keycode.isEventKey(event, 'Esc') || keycode.isEventKey(event, 'Tab')) {
+ this.removeClass('vjs-hover');
+ }
+ }
+
+ /**
+ * This method name now delegates to `handleSubmenuKeyDown`. This means
+ * anyone calling `handleSubmenuKeyPress` will not see their method calls
+ * stop working.
+ *
+ * @param {Event} event
+ * The event that caused this function to be called.
+ */
+ handleSubmenuKeyPress(event) {
+ this.handleSubmenuKeyDown(event);
+ }
+
+ /**
+ * Handle a `keydown` event on a sub-menu. The listener for this is added in
+ * the constructor.
+ *
+ * @param {Event} event
+ * Key press event
+ *
+ * @listens keydown
+ */
+ handleSubmenuKeyDown(event) {
+ // Escape or Tab unpress the 'button'
+ if (keycode.isEventKey(event, 'Esc') || keycode.isEventKey(event, 'Tab')) {
+ if (this.buttonPressed_) {
+ this.unpressButton();
+ }
+ // Don't preventDefault for Tab key - we still want to lose focus
+ if (!keycode.isEventKey(event, 'Tab')) {
+ event.preventDefault();
+ // Set focus back to the menu button's button
+ this.menuButton_.focus();
+ }
+ }
+ }
+
+ /**
+ * Put the current `MenuButton` into a pressed state.
+ */
+ pressButton() {
+ if (this.enabled_) {
+ this.buttonPressed_ = true;
+ this.menu.show();
+ this.menu.lockShowing();
+ this.menuButton_.el_.setAttribute('aria-expanded', 'true');
+
+ // set the focus into the submenu, except on iOS where it is resulting in
+ // undesired scrolling behavior when the player is in an iframe
+ if (IS_IOS && isInFrame()) {
+ // Return early so that the menu isn't focused
+ return;
+ }
+ this.menu.focus();
+ }
+ }
+
+ /**
+ * Take the current `MenuButton` out of a pressed state.
+ */
+ unpressButton() {
+ if (this.enabled_) {
+ this.buttonPressed_ = false;
+ this.menu.unlockShowing();
+ this.menu.hide();
+ this.menuButton_.el_.setAttribute('aria-expanded', 'false');
+ }
+ }
+
+ /**
+ * Disable the `MenuButton`. Don't allow it to be clicked.
+ */
+ disable() {
+ this.unpressButton();
+ this.enabled_ = false;
+ this.addClass('vjs-disabled');
+ this.menuButton_.disable();
+ }
+
+ /**
+ * Enable the `MenuButton`. Allow it to be clicked.
+ */
+ enable() {
+ this.enabled_ = true;
+ this.removeClass('vjs-disabled');
+ this.menuButton_.enable();
+ }
+ }
+ Component$1.registerComponent('MenuButton', MenuButton);
+
+ /**
+ * @file track-button.js
+ */
+
+ /**
+ * The base class for buttons that toggle specific track types (e.g. subtitles).
+ *
+ * @extends MenuButton
+ */
+ class TrackButton extends MenuButton {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('./player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ */
+ constructor(player, options) {
+ const tracks = options.tracks;
+ super(player, options);
+ if (this.items.length <= 1) {
+ this.hide();
+ }
+ if (!tracks) {
+ return;
+ }
+ const updateHandler = bind_(this, this.update);
+ tracks.addEventListener('removetrack', updateHandler);
+ tracks.addEventListener('addtrack', updateHandler);
+ tracks.addEventListener('labelchange', updateHandler);
+ this.player_.on('ready', updateHandler);
+ this.player_.on('dispose', function () {
+ tracks.removeEventListener('removetrack', updateHandler);
+ tracks.removeEventListener('addtrack', updateHandler);
+ tracks.removeEventListener('labelchange', updateHandler);
+ });
+ }
+ }
+ Component$1.registerComponent('TrackButton', TrackButton);
+
+ /**
+ * @file menu-keys.js
+ */
+
+ /**
+ * All keys used for operation of a menu (`MenuButton`, `Menu`, and `MenuItem`)
+ * Note that 'Enter' and 'Space' are not included here (otherwise they would
+ * prevent the `MenuButton` and `MenuItem` from being keyboard-clickable)
+ *
+ * @typedef MenuKeys
+ * @array
+ */
+ const MenuKeys = ['Tab', 'Esc', 'Up', 'Down', 'Right', 'Left'];
+
+ /**
+ * @file menu-item.js
+ */
+
+ /**
+ * The component for a menu item. `<li>`
+ *
+ * @extends ClickableComponent
+ */
+ class MenuItem extends ClickableComponent {
+ /**
+ * Creates an instance of the this class.
+ *
+ * @param { import('../player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options={}]
+ * The key/value store of player options.
+ *
+ */
+ constructor(player, options) {
+ super(player, options);
+ this.selectable = options.selectable;
+ this.isSelected_ = options.selected || false;
+ this.multiSelectable = options.multiSelectable;
+ this.selected(this.isSelected_);
+ if (this.selectable) {
+ if (this.multiSelectable) {
+ this.el_.setAttribute('role', 'menuitemcheckbox');
+ } else {
+ this.el_.setAttribute('role', 'menuitemradio');
+ }
+ } else {
+ this.el_.setAttribute('role', 'menuitem');
+ }
+ }
+
+ /**
+ * Create the `MenuItem's DOM element
+ *
+ * @param {string} [type=li]
+ * Element's node type, not actually used, always set to `li`.
+ *
+ * @param {Object} [props={}]
+ * An object of properties that should be set on the element
+ *
+ * @param {Object} [attrs={}]
+ * An object of attributes that should be set on the element
+ *
+ * @return {Element}
+ * The element that gets created.
+ */
+ createEl(type, props, attrs) {
+ // The control is textual, not just an icon
+ this.nonIconControl = true;
+ const el = super.createEl('li', Object.assign({
+ className: 'vjs-menu-item',
+ tabIndex: -1
+ }, props), attrs);
+
+ // swap icon with menu item text.
+ const menuItemEl = createEl('span', {
+ className: 'vjs-menu-item-text',
+ textContent: this.localize(this.options_.label)
+ });
+
+ // If using SVG icons, the element with vjs-icon-placeholder will be added separately.
+ if (this.player_.options_.experimentalSvgIcons) {
+ el.appendChild(menuItemEl);
+ } else {
+ el.replaceChild(menuItemEl, el.querySelector('.vjs-icon-placeholder'));
+ }
+ return el;
+ }
+
+ /**
+ * Ignore keys which are used by the menu, but pass any other ones up. See
+ * {@link ClickableComponent#handleKeyDown} for instances where this is called.
+ *
+ * @param {KeyboardEvent} event
+ * The `keydown` event that caused this function to be called.
+ *
+ * @listens keydown
+ */
+ handleKeyDown(event) {
+ if (!MenuKeys.some(key => keycode.isEventKey(event, key))) {
+ // Pass keydown handling up for unused keys
+ super.handleKeyDown(event);
+ }
+ }
+
+ /**
+ * Any click on a `MenuItem` puts it into the selected state.
+ * See {@link ClickableComponent#handleClick} for instances where this is called.
+ *
+ * @param {Event} event
+ * The `keydown`, `tap`, or `click` event that caused this function to be
+ * called.
+ *
+ * @listens tap
+ * @listens click
+ */
+ handleClick(event) {
+ this.selected(true);
+ }
+
+ /**
+ * Set the state for this menu item as selected or not.
+ *
+ * @param {boolean} selected
+ * if the menu item is selected or not
+ */
+ selected(selected) {
+ if (this.selectable) {
+ if (selected) {
+ this.addClass('vjs-selected');
+ this.el_.setAttribute('aria-checked', 'true');
+ // aria-checked isn't fully supported by browsers/screen readers,
+ // so indicate selected state to screen reader in the control text.
+ this.controlText(', selected');
+ this.isSelected_ = true;
+ } else {
+ this.removeClass('vjs-selected');
+ this.el_.setAttribute('aria-checked', 'false');
+ // Indicate un-selected state to screen reader
+ this.controlText('');
+ this.isSelected_ = false;
+ }
+ }
+ }
+ }
+ Component$1.registerComponent('MenuItem', MenuItem);
+
+ /**
+ * @file text-track-menu-item.js
+ */
+
+ /**
+ * The specific menu item type for selecting a language within a text track kind
+ *
+ * @extends MenuItem
+ */
+ class TextTrackMenuItem extends MenuItem {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('../../player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ */
+ constructor(player, options) {
+ const track = options.track;
+ const tracks = player.textTracks();
+
+ // Modify options for parent MenuItem class's init.
+ options.label = track.label || track.language || 'Unknown';
+ options.selected = track.mode === 'showing';
+ super(player, options);
+ this.track = track;
+ // Determine the relevant kind(s) of tracks for this component and filter
+ // out empty kinds.
+ this.kinds = (options.kinds || [options.kind || this.track.kind]).filter(Boolean);
+ const changeHandler = (...args) => {
+ this.handleTracksChange.apply(this, args);
+ };
+ const selectedLanguageChangeHandler = (...args) => {
+ this.handleSelectedLanguageChange.apply(this, args);
+ };
+ player.on(['loadstart', 'texttrackchange'], changeHandler);
+ tracks.addEventListener('change', changeHandler);
+ tracks.addEventListener('selectedlanguagechange', selectedLanguageChangeHandler);
+ this.on('dispose', function () {
+ player.off(['loadstart', 'texttrackchange'], changeHandler);
+ tracks.removeEventListener('change', changeHandler);
+ tracks.removeEventListener('selectedlanguagechange', selectedLanguageChangeHandler);
+ });
+
+ // iOS7 doesn't dispatch change events to TextTrackLists when an
+ // associated track's mode changes. Without something like
+ // Object.observe() (also not present on iOS7), it's not
+ // possible to detect changes to the mode attribute and polyfill
+ // the change event. As a poor substitute, we manually dispatch
+ // change events whenever the controls modify the mode.
+ if (tracks.onchange === undefined) {
+ let event;
+ this.on(['tap', 'click'], function () {
+ if (typeof window.Event !== 'object') {
+ // Android 2.3 throws an Illegal Constructor error for window.Event
+ try {
+ event = new window.Event('change');
+ } catch (err) {
+ // continue regardless of error
+ }
+ }
+ if (!event) {
+ event = document.createEvent('Event');
+ event.initEvent('change', true, true);
+ }
+ tracks.dispatchEvent(event);
+ });
+ }
+
+ // set the default state based on current tracks
+ this.handleTracksChange();
+ }
+
+ /**
+ * This gets called when an `TextTrackMenuItem` is "clicked". See
+ * {@link ClickableComponent} for more detailed information on what a click can be.
+ *
+ * @param {Event} event
+ * The `keydown`, `tap`, or `click` event that caused this function to be
+ * called.
+ *
+ * @listens tap
+ * @listens click
+ */
+ handleClick(event) {
+ const referenceTrack = this.track;
+ const tracks = this.player_.textTracks();
+ super.handleClick(event);
+ if (!tracks) {
+ return;
+ }
+ for (let i = 0; i < tracks.length; i++) {
+ const track = tracks[i];
+
+ // If the track from the text tracks list is not of the right kind,
+ // skip it. We do not want to affect tracks of incompatible kind(s).
+ if (this.kinds.indexOf(track.kind) === -1) {
+ continue;
+ }
+
+ // If this text track is the component's track and it is not showing,
+ // set it to showing.
+ if (track === referenceTrack) {
+ if (track.mode !== 'showing') {
+ track.mode = 'showing';
+ }
+
+ // If this text track is not the component's track and it is not
+ // disabled, set it to disabled.
+ } else if (track.mode !== 'disabled') {
+ track.mode = 'disabled';
+ }
+ }
+ }
+
+ /**
+ * Handle text track list change
+ *
+ * @param {Event} event
+ * The `change` event that caused this function to be called.
+ *
+ * @listens TextTrackList#change
+ */
+ handleTracksChange(event) {
+ const shouldBeSelected = this.track.mode === 'showing';
+
+ // Prevent redundant selected() calls because they may cause
+ // screen readers to read the appended control text unnecessarily
+ if (shouldBeSelected !== this.isSelected_) {
+ this.selected(shouldBeSelected);
+ }
+ }
+ handleSelectedLanguageChange(event) {
+ if (this.track.mode === 'showing') {
+ const selectedLanguage = this.player_.cache_.selectedLanguage;
+
+ // Don't replace the kind of track across the same language
+ if (selectedLanguage && selectedLanguage.enabled && selectedLanguage.language === this.track.language && selectedLanguage.kind !== this.track.kind) {
+ return;
+ }
+ this.player_.cache_.selectedLanguage = {
+ enabled: true,
+ language: this.track.language,
+ kind: this.track.kind
+ };
+ }
+ }
+ dispose() {
+ // remove reference to track object on dispose
+ this.track = null;
+ super.dispose();
+ }
+ }
+ Component$1.registerComponent('TextTrackMenuItem', TextTrackMenuItem);
+
+ /**
+ * @file off-text-track-menu-item.js
+ */
+
+ /**
+ * A special menu item for turning off a specific type of text track
+ *
+ * @extends TextTrackMenuItem
+ */
+ class OffTextTrackMenuItem extends TextTrackMenuItem {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('../../player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ */
+ constructor(player, options) {
+ // Create pseudo track info
+ // Requires options['kind']
+ options.track = {
+ player,
+ // it is no longer necessary to store `kind` or `kinds` on the track itself
+ // since they are now stored in the `kinds` property of all instances of
+ // TextTrackMenuItem, but this will remain for backwards compatibility
+ kind: options.kind,
+ kinds: options.kinds,
+ default: false,
+ mode: 'disabled'
+ };
+ if (!options.kinds) {
+ options.kinds = [options.kind];
+ }
+ if (options.label) {
+ options.track.label = options.label;
+ } else {
+ options.track.label = options.kinds.join(' and ') + ' off';
+ }
+
+ // MenuItem is selectable
+ options.selectable = true;
+ // MenuItem is NOT multiSelectable (i.e. only one can be marked "selected" at a time)
+ options.multiSelectable = false;
+ super(player, options);
+ }
+
+ /**
+ * Handle text track change
+ *
+ * @param {Event} event
+ * The event that caused this function to run
+ */
+ handleTracksChange(event) {
+ const tracks = this.player().textTracks();
+ let shouldBeSelected = true;
+ for (let i = 0, l = tracks.length; i < l; i++) {
+ const track = tracks[i];
+ if (this.options_.kinds.indexOf(track.kind) > -1 && track.mode === 'showing') {
+ shouldBeSelected = false;
+ break;
+ }
+ }
+
+ // Prevent redundant selected() calls because they may cause
+ // screen readers to read the appended control text unnecessarily
+ if (shouldBeSelected !== this.isSelected_) {
+ this.selected(shouldBeSelected);
+ }
+ }
+ handleSelectedLanguageChange(event) {
+ const tracks = this.player().textTracks();
+ let allHidden = true;
+ for (let i = 0, l = tracks.length; i < l; i++) {
+ const track = tracks[i];
+ if (['captions', 'descriptions', 'subtitles'].indexOf(track.kind) > -1 && track.mode === 'showing') {
+ allHidden = false;
+ break;
+ }
+ }
+ if (allHidden) {
+ this.player_.cache_.selectedLanguage = {
+ enabled: false
+ };
+ }
+ }
+
+ /**
+ * Update control text and label on languagechange
+ */
+ handleLanguagechange() {
+ this.$('.vjs-menu-item-text').textContent = this.player_.localize(this.options_.label);
+ super.handleLanguagechange();
+ }
+ }
+ Component$1.registerComponent('OffTextTrackMenuItem', OffTextTrackMenuItem);
+
+ /**
+ * @file text-track-button.js
+ */
+
+ /**
+ * The base class for buttons that toggle specific text track types (e.g. subtitles)
+ *
+ * @extends MenuButton
+ */
+ class TextTrackButton extends TrackButton {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('../../player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options={}]
+ * The key/value store of player options.
+ */
+ constructor(player, options = {}) {
+ options.tracks = player.textTracks();
+ super(player, options);
+ }
+
+ /**
+ * Create a menu item for each text track
+ *
+ * @param {TextTrackMenuItem[]} [items=[]]
+ * Existing array of items to use during creation
+ *
+ * @return {TextTrackMenuItem[]}
+ * Array of menu items that were created
+ */
+ createItems(items = [], TrackMenuItem = TextTrackMenuItem) {
+ // Label is an override for the [track] off label
+ // USed to localise captions/subtitles
+ let label;
+ if (this.label_) {
+ label = `${this.label_} off`;
+ }
+ // Add an OFF menu item to turn all tracks off
+ items.push(new OffTextTrackMenuItem(this.player_, {
+ kinds: this.kinds_,
+ kind: this.kind_,
+ label
+ }));
+ this.hideThreshold_ += 1;
+ const tracks = this.player_.textTracks();
+ if (!Array.isArray(this.kinds_)) {
+ this.kinds_ = [this.kind_];
+ }
+ for (let i = 0; i < tracks.length; i++) {
+ const track = tracks[i];
+
+ // only add tracks that are of an appropriate kind and have a label
+ if (this.kinds_.indexOf(track.kind) > -1) {
+ const item = new TrackMenuItem(this.player_, {
+ track,
+ kinds: this.kinds_,
+ kind: this.kind_,
+ // MenuItem is selectable
+ selectable: true,
+ // MenuItem is NOT multiSelectable (i.e. only one can be marked "selected" at a time)
+ multiSelectable: false
+ });
+ item.addClass(`vjs-${track.kind}-menu-item`);
+ items.push(item);
+ }
+ }
+ return items;
+ }
+ }
+ Component$1.registerComponent('TextTrackButton', TextTrackButton);
+
+ /**
+ * @file chapters-track-menu-item.js
+ */
+
+ /**
+ * The chapter track menu item
+ *
+ * @extends MenuItem
+ */
+ class ChaptersTrackMenuItem extends MenuItem {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('../../player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ */
+ constructor(player, options) {
+ const track = options.track;
+ const cue = options.cue;
+ const currentTime = player.currentTime();
+
+ // Modify options for parent MenuItem class's init.
+ options.selectable = true;
+ options.multiSelectable = false;
+ options.label = cue.text;
+ options.selected = cue.startTime <= currentTime && currentTime < cue.endTime;
+ super(player, options);
+ this.track = track;
+ this.cue = cue;
+ }
+
+ /**
+ * This gets called when an `ChaptersTrackMenuItem` is "clicked". See
+ * {@link ClickableComponent} for more detailed information on what a click can be.
+ *
+ * @param {Event} [event]
+ * The `keydown`, `tap`, or `click` event that caused this function to be
+ * called.
+ *
+ * @listens tap
+ * @listens click
+ */
+ handleClick(event) {
+ super.handleClick();
+ this.player_.currentTime(this.cue.startTime);
+ }
+ }
+ Component$1.registerComponent('ChaptersTrackMenuItem', ChaptersTrackMenuItem);
+
+ /**
+ * @file chapters-button.js
+ */
+
+ /**
+ * The button component for toggling and selecting chapters
+ * Chapters act much differently than other text tracks
+ * Cues are navigation vs. other tracks of alternative languages
+ *
+ * @extends TextTrackButton
+ */
+ class ChaptersButton extends TextTrackButton {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('../../player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ *
+ * @param {Function} [ready]
+ * The function to call when this function is ready.
+ */
+ constructor(player, options, ready) {
+ super(player, options, ready);
+ this.setIcon('chapters');
+ this.selectCurrentItem_ = () => {
+ this.items.forEach(item => {
+ item.selected(this.track_.activeCues[0] === item.cue);
+ });
+ };
+ }
+
+ /**
+ * Builds the default DOM `className`.
+ *
+ * @return {string}
+ * The DOM `className` for this object.
+ */
+ buildCSSClass() {
+ return `vjs-chapters-button ${super.buildCSSClass()}`;
+ }
+ buildWrapperCSSClass() {
+ return `vjs-chapters-button ${super.buildWrapperCSSClass()}`;
+ }
+
+ /**
+ * Update the menu based on the current state of its items.
+ *
+ * @param {Event} [event]
+ * An event that triggered this function to run.
+ *
+ * @listens TextTrackList#addtrack
+ * @listens TextTrackList#removetrack
+ * @listens TextTrackList#change
+ */
+ update(event) {
+ if (event && event.track && event.track.kind !== 'chapters') {
+ return;
+ }
+ const track = this.findChaptersTrack();
+ if (track !== this.track_) {
+ this.setTrack(track);
+ super.update();
+ } else if (!this.items || track && track.cues && track.cues.length !== this.items.length) {
+ // Update the menu initially or if the number of cues has changed since set
+ super.update();
+ }
+ }
+
+ /**
+ * Set the currently selected track for the chapters button.
+ *
+ * @param {TextTrack} track
+ * The new track to select. Nothing will change if this is the currently selected
+ * track.
+ */
+ setTrack(track) {
+ if (this.track_ === track) {
+ return;
+ }
+ if (!this.updateHandler_) {
+ this.updateHandler_ = this.update.bind(this);
+ }
+
+ // here this.track_ refers to the old track instance
+ if (this.track_) {
+ const remoteTextTrackEl = this.player_.remoteTextTrackEls().getTrackElementByTrack_(this.track_);
+ if (remoteTextTrackEl) {
+ remoteTextTrackEl.removeEventListener('load', this.updateHandler_);
+ }
+ this.track_.removeEventListener('cuechange', this.selectCurrentItem_);
+ this.track_ = null;
+ }
+ this.track_ = track;
+
+ // here this.track_ refers to the new track instance
+ if (this.track_) {
+ this.track_.mode = 'hidden';
+ const remoteTextTrackEl = this.player_.remoteTextTrackEls().getTrackElementByTrack_(this.track_);
+ if (remoteTextTrackEl) {
+ remoteTextTrackEl.addEventListener('load', this.updateHandler_);
+ }
+ this.track_.addEventListener('cuechange', this.selectCurrentItem_);
+ }
+ }
+
+ /**
+ * Find the track object that is currently in use by this ChaptersButton
+ *
+ * @return {TextTrack|undefined}
+ * The current track or undefined if none was found.
+ */
+ findChaptersTrack() {
+ const tracks = this.player_.textTracks() || [];
+ for (let i = tracks.length - 1; i >= 0; i--) {
+ // We will always choose the last track as our chaptersTrack
+ const track = tracks[i];
+ if (track.kind === this.kind_) {
+ return track;
+ }
+ }
+ }
+
+ /**
+ * Get the caption for the ChaptersButton based on the track label. This will also
+ * use the current tracks localized kind as a fallback if a label does not exist.
+ *
+ * @return {string}
+ * The tracks current label or the localized track kind.
+ */
+ getMenuCaption() {
+ if (this.track_ && this.track_.label) {
+ return this.track_.label;
+ }
+ return this.localize(toTitleCase$1(this.kind_));
+ }
+
+ /**
+ * Create menu from chapter track
+ *
+ * @return { import('../../menu/menu').default }
+ * New menu for the chapter buttons
+ */
+ createMenu() {
+ this.options_.title = this.getMenuCaption();
+ return super.createMenu();
+ }
+
+ /**
+ * Create a menu item for each text track
+ *
+ * @return { import('./text-track-menu-item').default[] }
+ * Array of menu items
+ */
+ createItems() {
+ const items = [];
+ if (!this.track_) {
+ return items;
+ }
+ const cues = this.track_.cues;
+ if (!cues) {
+ return items;
+ }
+ for (let i = 0, l = cues.length; i < l; i++) {
+ const cue = cues[i];
+ const mi = new ChaptersTrackMenuItem(this.player_, {
+ track: this.track_,
+ cue
+ });
+ items.push(mi);
+ }
+ return items;
+ }
+ }
+
+ /**
+ * `kind` of TextTrack to look for to associate it with this menu.
+ *
+ * @type {string}
+ * @private
+ */
+ ChaptersButton.prototype.kind_ = 'chapters';
+
+ /**
+ * The text that should display over the `ChaptersButton`s controls. Added for localization.
+ *
+ * @type {string}
+ * @protected
+ */
+ ChaptersButton.prototype.controlText_ = 'Chapters';
+ Component$1.registerComponent('ChaptersButton', ChaptersButton);
+
+ /**
+ * @file descriptions-button.js
+ */
+
+ /**
+ * The button component for toggling and selecting descriptions
+ *
+ * @extends TextTrackButton
+ */
+ class DescriptionsButton extends TextTrackButton {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('../../player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ *
+ * @param {Function} [ready]
+ * The function to call when this component is ready.
+ */
+ constructor(player, options, ready) {
+ super(player, options, ready);
+ this.setIcon('audio-description');
+ const tracks = player.textTracks();
+ const changeHandler = bind_(this, this.handleTracksChange);
+ tracks.addEventListener('change', changeHandler);
+ this.on('dispose', function () {
+ tracks.removeEventListener('change', changeHandler);
+ });
+ }
+
+ /**
+ * Handle text track change
+ *
+ * @param {Event} event
+ * The event that caused this function to run
+ *
+ * @listens TextTrackList#change
+ */
+ handleTracksChange(event) {
+ const tracks = this.player().textTracks();
+ let disabled = false;
+
+ // Check whether a track of a different kind is showing
+ for (let i = 0, l = tracks.length; i < l; i++) {
+ const track = tracks[i];
+ if (track.kind !== this.kind_ && track.mode === 'showing') {
+ disabled = true;
+ break;
+ }
+ }
+
+ // If another track is showing, disable this menu button
+ if (disabled) {
+ this.disable();
+ } else {
+ this.enable();
+ }
+ }
+
+ /**
+ * Builds the default DOM `className`.
+ *
+ * @return {string}
+ * The DOM `className` for this object.
+ */
+ buildCSSClass() {
+ return `vjs-descriptions-button ${super.buildCSSClass()}`;
+ }
+ buildWrapperCSSClass() {
+ return `vjs-descriptions-button ${super.buildWrapperCSSClass()}`;
+ }
+ }
+
+ /**
+ * `kind` of TextTrack to look for to associate it with this menu.
+ *
+ * @type {string}
+ * @private
+ */
+ DescriptionsButton.prototype.kind_ = 'descriptions';
+
+ /**
+ * The text that should display over the `DescriptionsButton`s controls. Added for localization.
+ *
+ * @type {string}
+ * @protected
+ */
+ DescriptionsButton.prototype.controlText_ = 'Descriptions';
+ Component$1.registerComponent('DescriptionsButton', DescriptionsButton);
+
+ /**
+ * @file subtitles-button.js
+ */
+
+ /**
+ * The button component for toggling and selecting subtitles
+ *
+ * @extends TextTrackButton
+ */
+ class SubtitlesButton extends TextTrackButton {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('../../player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ *
+ * @param {Function} [ready]
+ * The function to call when this component is ready.
+ */
+ constructor(player, options, ready) {
+ super(player, options, ready);
+ this.setIcon('subtitles');
+ }
+
+ /**
+ * Builds the default DOM `className`.
+ *
+ * @return {string}
+ * The DOM `className` for this object.
+ */
+ buildCSSClass() {
+ return `vjs-subtitles-button ${super.buildCSSClass()}`;
+ }
+ buildWrapperCSSClass() {
+ return `vjs-subtitles-button ${super.buildWrapperCSSClass()}`;
+ }
+ }
+
+ /**
+ * `kind` of TextTrack to look for to associate it with this menu.
+ *
+ * @type {string}
+ * @private
+ */
+ SubtitlesButton.prototype.kind_ = 'subtitles';
+
+ /**
+ * The text that should display over the `SubtitlesButton`s controls. Added for localization.
+ *
+ * @type {string}
+ * @protected
+ */
+ SubtitlesButton.prototype.controlText_ = 'Subtitles';
+ Component$1.registerComponent('SubtitlesButton', SubtitlesButton);
+
+ /**
+ * @file caption-settings-menu-item.js
+ */
+
+ /**
+ * The menu item for caption track settings menu
+ *
+ * @extends TextTrackMenuItem
+ */
+ class CaptionSettingsMenuItem extends TextTrackMenuItem {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('../../player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ */
+ constructor(player, options) {
+ options.track = {
+ player,
+ kind: options.kind,
+ label: options.kind + ' settings',
+ selectable: false,
+ default: false,
+ mode: 'disabled'
+ };
+
+ // CaptionSettingsMenuItem has no concept of 'selected'
+ options.selectable = false;
+ options.name = 'CaptionSettingsMenuItem';
+ super(player, options);
+ this.addClass('vjs-texttrack-settings');
+ this.controlText(', opens ' + options.kind + ' settings dialog');
+ }
+
+ /**
+ * This gets called when an `CaptionSettingsMenuItem` is "clicked". See
+ * {@link ClickableComponent} for more detailed information on what a click can be.
+ *
+ * @param {Event} [event]
+ * The `keydown`, `tap`, or `click` event that caused this function to be
+ * called.
+ *
+ * @listens tap
+ * @listens click
+ */
+ handleClick(event) {
+ this.player().getChild('textTrackSettings').open();
+ }
+
+ /**
+ * Update control text and label on languagechange
+ */
+ handleLanguagechange() {
+ this.$('.vjs-menu-item-text').textContent = this.player_.localize(this.options_.kind + ' settings');
+ super.handleLanguagechange();
+ }
+ }
+ Component$1.registerComponent('CaptionSettingsMenuItem', CaptionSettingsMenuItem);
+
+ /**
+ * @file captions-button.js
+ */
+
+ /**
+ * The button component for toggling and selecting captions
+ *
+ * @extends TextTrackButton
+ */
+ class CaptionsButton extends TextTrackButton {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('../../player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ *
+ * @param {Function} [ready]
+ * The function to call when this component is ready.
+ */
+ constructor(player, options, ready) {
+ super(player, options, ready);
+ this.setIcon('captions');
+ }
+
+ /**
+ * Builds the default DOM `className`.
+ *
+ * @return {string}
+ * The DOM `className` for this object.
+ */
+ buildCSSClass() {
+ return `vjs-captions-button ${super.buildCSSClass()}`;
+ }
+ buildWrapperCSSClass() {
+ return `vjs-captions-button ${super.buildWrapperCSSClass()}`;
+ }
+
+ /**
+ * Create caption menu items
+ *
+ * @return {CaptionSettingsMenuItem[]}
+ * The array of current menu items.
+ */
+ createItems() {
+ const items = [];
+ if (!(this.player().tech_ && this.player().tech_.featuresNativeTextTracks) && this.player().getChild('textTrackSettings')) {
+ items.push(new CaptionSettingsMenuItem(this.player_, {
+ kind: this.kind_
+ }));
+ this.hideThreshold_ += 1;
+ }
+ return super.createItems(items);
+ }
+ }
+
+ /**
+ * `kind` of TextTrack to look for to associate it with this menu.
+ *
+ * @type {string}
+ * @private
+ */
+ CaptionsButton.prototype.kind_ = 'captions';
+
+ /**
+ * The text that should display over the `CaptionsButton`s controls. Added for localization.
+ *
+ * @type {string}
+ * @protected
+ */
+ CaptionsButton.prototype.controlText_ = 'Captions';
+ Component$1.registerComponent('CaptionsButton', CaptionsButton);
+
+ /**
+ * @file subs-caps-menu-item.js
+ */
+
+ /**
+ * SubsCapsMenuItem has an [cc] icon to distinguish captions from subtitles
+ * in the SubsCapsMenu.
+ *
+ * @extends TextTrackMenuItem
+ */
+ class SubsCapsMenuItem extends TextTrackMenuItem {
+ createEl(type, props, attrs) {
+ const el = super.createEl(type, props, attrs);
+ const parentSpan = el.querySelector('.vjs-menu-item-text');
+ if (this.options_.track.kind === 'captions') {
+ if (this.player_.options_.experimentalSvgIcons) {
+ this.setIcon('captions', el);
+ } else {
+ parentSpan.appendChild(createEl('span', {
+ className: 'vjs-icon-placeholder'
+ }, {
+ 'aria-hidden': true
+ }));
+ }
+ parentSpan.appendChild(createEl('span', {
+ className: 'vjs-control-text',
+ // space added as the text will visually flow with the
+ // label
+ textContent: ` ${this.localize('Captions')}`
+ }));
+ }
+ return el;
+ }
+ }
+ Component$1.registerComponent('SubsCapsMenuItem', SubsCapsMenuItem);
+
+ /**
+ * @file sub-caps-button.js
+ */
+
+ /**
+ * The button component for toggling and selecting captions and/or subtitles
+ *
+ * @extends TextTrackButton
+ */
+ class SubsCapsButton extends TextTrackButton {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('../../player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ *
+ * @param {Function} [ready]
+ * The function to call when this component is ready.
+ */
+ constructor(player, options = {}) {
+ super(player, options);
+
+ // Although North America uses "captions" in most cases for
+ // "captions and subtitles" other locales use "subtitles"
+ this.label_ = 'subtitles';
+ this.setIcon('subtitles');
+ if (['en', 'en-us', 'en-ca', 'fr-ca'].indexOf(this.player_.language_) > -1) {
+ this.label_ = 'captions';
+ this.setIcon('captions');
+ }
+ this.menuButton_.controlText(toTitleCase$1(this.label_));
+ }
+
+ /**
+ * Builds the default DOM `className`.
+ *
+ * @return {string}
+ * The DOM `className` for this object.
+ */
+ buildCSSClass() {
+ return `vjs-subs-caps-button ${super.buildCSSClass()}`;
+ }
+ buildWrapperCSSClass() {
+ return `vjs-subs-caps-button ${super.buildWrapperCSSClass()}`;
+ }
+
+ /**
+ * Create caption/subtitles menu items
+ *
+ * @return {CaptionSettingsMenuItem[]}
+ * The array of current menu items.
+ */
+ createItems() {
+ let items = [];
+ if (!(this.player().tech_ && this.player().tech_.featuresNativeTextTracks) && this.player().getChild('textTrackSettings')) {
+ items.push(new CaptionSettingsMenuItem(this.player_, {
+ kind: this.label_
+ }));
+ this.hideThreshold_ += 1;
+ }
+ items = super.createItems(items, SubsCapsMenuItem);
+ return items;
+ }
+ }
+
+ /**
+ * `kind`s of TextTrack to look for to associate it with this menu.
+ *
+ * @type {array}
+ * @private
+ */
+ SubsCapsButton.prototype.kinds_ = ['captions', 'subtitles'];
+
+ /**
+ * The text that should display over the `SubsCapsButton`s controls.
+ *
+ *
+ * @type {string}
+ * @protected
+ */
+ SubsCapsButton.prototype.controlText_ = 'Subtitles';
+ Component$1.registerComponent('SubsCapsButton', SubsCapsButton);
+
+ /**
+ * @file audio-track-menu-item.js
+ */
+
+ /**
+ * An {@link AudioTrack} {@link MenuItem}
+ *
+ * @extends MenuItem
+ */
+ class AudioTrackMenuItem extends MenuItem {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('../../player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ */
+ constructor(player, options) {
+ const track = options.track;
+ const tracks = player.audioTracks();
+
+ // Modify options for parent MenuItem class's init.
+ options.label = track.label || track.language || 'Unknown';
+ options.selected = track.enabled;
+ super(player, options);
+ this.track = track;
+ this.addClass(`vjs-${track.kind}-menu-item`);
+ const changeHandler = (...args) => {
+ this.handleTracksChange.apply(this, args);
+ };
+ tracks.addEventListener('change', changeHandler);
+ this.on('dispose', () => {
+ tracks.removeEventListener('change', changeHandler);
+ });
+ }
+ createEl(type, props, attrs) {
+ const el = super.createEl(type, props, attrs);
+ const parentSpan = el.querySelector('.vjs-menu-item-text');
+ if (['main-desc', 'description'].indexOf(this.options_.track.kind) >= 0) {
+ parentSpan.appendChild(createEl('span', {
+ className: 'vjs-icon-placeholder'
+ }, {
+ 'aria-hidden': true
+ }));
+ parentSpan.appendChild(createEl('span', {
+ className: 'vjs-control-text',
+ textContent: ' ' + this.localize('Descriptions')
+ }));
+ }
+ return el;
+ }
+
+ /**
+ * This gets called when an `AudioTrackMenuItem is "clicked". See {@link ClickableComponent}
+ * for more detailed information on what a click can be.
+ *
+ * @param {Event} [event]
+ * The `keydown`, `tap`, or `click` event that caused this function to be
+ * called.
+ *
+ * @listens tap
+ * @listens click
+ */
+ handleClick(event) {
+ super.handleClick(event);
+
+ // the audio track list will automatically toggle other tracks
+ // off for us.
+ this.track.enabled = true;
+
+ // when native audio tracks are used, we want to make sure that other tracks are turned off
+ if (this.player_.tech_.featuresNativeAudioTracks) {
+ const tracks = this.player_.audioTracks();
+ for (let i = 0; i < tracks.length; i++) {
+ const track = tracks[i];
+
+ // skip the current track since we enabled it above
+ if (track === this.track) {
+ continue;
+ }
+ track.enabled = track === this.track;
+ }
+ }
+ }
+
+ /**
+ * Handle any {@link AudioTrack} change.
+ *
+ * @param {Event} [event]
+ * The {@link AudioTrackList#change} event that caused this to run.
+ *
+ * @listens AudioTrackList#change
+ */
+ handleTracksChange(event) {
+ this.selected(this.track.enabled);
+ }
+ }
+ Component$1.registerComponent('AudioTrackMenuItem', AudioTrackMenuItem);
+
+ /**
+ * @file audio-track-button.js
+ */
+
+ /**
+ * The base class for buttons that toggle specific {@link AudioTrack} types.
+ *
+ * @extends TrackButton
+ */
+ class AudioTrackButton extends TrackButton {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param {Player} player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options={}]
+ * The key/value store of player options.
+ */
+ constructor(player, options = {}) {
+ options.tracks = player.audioTracks();
+ super(player, options);
+ this.setIcon('audio');
+ }
+
+ /**
+ * Builds the default DOM `className`.
+ *
+ * @return {string}
+ * The DOM `className` for this object.
+ */
+ buildCSSClass() {
+ return `vjs-audio-button ${super.buildCSSClass()}`;
+ }
+ buildWrapperCSSClass() {
+ return `vjs-audio-button ${super.buildWrapperCSSClass()}`;
+ }
+
+ /**
+ * Create a menu item for each audio track
+ *
+ * @param {AudioTrackMenuItem[]} [items=[]]
+ * An array of existing menu items to use.
+ *
+ * @return {AudioTrackMenuItem[]}
+ * An array of menu items
+ */
+ createItems(items = []) {
+ // if there's only one audio track, there no point in showing it
+ this.hideThreshold_ = 1;
+ const tracks = this.player_.audioTracks();
+ for (let i = 0; i < tracks.length; i++) {
+ const track = tracks[i];
+ items.push(new AudioTrackMenuItem(this.player_, {
+ track,
+ // MenuItem is selectable
+ selectable: true,
+ // MenuItem is NOT multiSelectable (i.e. only one can be marked "selected" at a time)
+ multiSelectable: false
+ }));
+ }
+ return items;
+ }
+ }
+
+ /**
+ * The text that should display over the `AudioTrackButton`s controls. Added for localization.
+ *
+ * @type {string}
+ * @protected
+ */
+ AudioTrackButton.prototype.controlText_ = 'Audio Track';
+ Component$1.registerComponent('AudioTrackButton', AudioTrackButton);
+
+ /**
+ * @file playback-rate-menu-item.js
+ */
+
+ /**
+ * The specific menu item type for selecting a playback rate.
+ *
+ * @extends MenuItem
+ */
+ class PlaybackRateMenuItem extends MenuItem {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('../../player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ */
+ constructor(player, options) {
+ const label = options.rate;
+ const rate = parseFloat(label, 10);
+
+ // Modify options for parent MenuItem class's init.
+ options.label = label;
+ options.selected = rate === player.playbackRate();
+ options.selectable = true;
+ options.multiSelectable = false;
+ super(player, options);
+ this.label = label;
+ this.rate = rate;
+ this.on(player, 'ratechange', e => this.update(e));
+ }
+
+ /**
+ * This gets called when an `PlaybackRateMenuItem` is "clicked". See
+ * {@link ClickableComponent} for more detailed information on what a click can be.
+ *
+ * @param {Event} [event]
+ * The `keydown`, `tap`, or `click` event that caused this function to be
+ * called.
+ *
+ * @listens tap
+ * @listens click
+ */
+ handleClick(event) {
+ super.handleClick();
+ this.player().playbackRate(this.rate);
+ }
+
+ /**
+ * Update the PlaybackRateMenuItem when the playbackrate changes.
+ *
+ * @param {Event} [event]
+ * The `ratechange` event that caused this function to run.
+ *
+ * @listens Player#ratechange
+ */
+ update(event) {
+ this.selected(this.player().playbackRate() === this.rate);
+ }
+ }
+
+ /**
+ * The text that should display over the `PlaybackRateMenuItem`s controls. Added for localization.
+ *
+ * @type {string}
+ * @private
+ */
+ PlaybackRateMenuItem.prototype.contentElType = 'button';
+ Component$1.registerComponent('PlaybackRateMenuItem', PlaybackRateMenuItem);
+
+ /**
+ * @file playback-rate-menu-button.js
+ */
+
+ /**
+ * The component for controlling the playback rate.
+ *
+ * @extends MenuButton
+ */
+ class PlaybackRateMenuButton extends MenuButton {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('../../player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ */
+ constructor(player, options) {
+ super(player, options);
+ this.menuButton_.el_.setAttribute('aria-describedby', this.labelElId_);
+ this.updateVisibility();
+ this.updateLabel();
+ this.on(player, 'loadstart', e => this.updateVisibility(e));
+ this.on(player, 'ratechange', e => this.updateLabel(e));
+ this.on(player, 'playbackrateschange', e => this.handlePlaybackRateschange(e));
+ }
+
+ /**
+ * Create the `Component`'s DOM element
+ *
+ * @return {Element}
+ * The element that was created.
+ */
+ createEl() {
+ const el = super.createEl();
+ this.labelElId_ = 'vjs-playback-rate-value-label-' + this.id_;
+ this.labelEl_ = createEl('div', {
+ className: 'vjs-playback-rate-value',
+ id: this.labelElId_,
+ textContent: '1x'
+ });
+ el.appendChild(this.labelEl_);
+ return el;
+ }
+ dispose() {
+ this.labelEl_ = null;
+ super.dispose();
+ }
+
+ /**
+ * Builds the default DOM `className`.
+ *
+ * @return {string}
+ * The DOM `className` for this object.
+ */
+ buildCSSClass() {
+ return `vjs-playback-rate ${super.buildCSSClass()}`;
+ }
+ buildWrapperCSSClass() {
+ return `vjs-playback-rate ${super.buildWrapperCSSClass()}`;
+ }
+
+ /**
+ * Create the list of menu items. Specific to each subclass.
+ *
+ */
+ createItems() {
+ const rates = this.playbackRates();
+ const items = [];
+ for (let i = rates.length - 1; i >= 0; i--) {
+ items.push(new PlaybackRateMenuItem(this.player(), {
+ rate: rates[i] + 'x'
+ }));
+ }
+ return items;
+ }
+
+ /**
+ * On playbackrateschange, update the menu to account for the new items.
+ *
+ * @listens Player#playbackrateschange
+ */
+ handlePlaybackRateschange(event) {
+ this.update();
+ }
+
+ /**
+ * Get possible playback rates
+ *
+ * @return {Array}
+ * All possible playback rates
+ */
+ playbackRates() {
+ const player = this.player();
+ return player.playbackRates && player.playbackRates() || [];
+ }
+
+ /**
+ * Get whether playback rates is supported by the tech
+ * and an array of playback rates exists
+ *
+ * @return {boolean}
+ * Whether changing playback rate is supported
+ */
+ playbackRateSupported() {
+ return this.player().tech_ && this.player().tech_.featuresPlaybackRate && this.playbackRates() && this.playbackRates().length > 0;
+ }
+
+ /**
+ * Hide playback rate controls when they're no playback rate options to select
+ *
+ * @param {Event} [event]
+ * The event that caused this function to run.
+ *
+ * @listens Player#loadstart
+ */
+ updateVisibility(event) {
+ if (this.playbackRateSupported()) {
+ this.removeClass('vjs-hidden');
+ } else {
+ this.addClass('vjs-hidden');
+ }
+ }
+
+ /**
+ * Update button label when rate changed
+ *
+ * @param {Event} [event]
+ * The event that caused this function to run.
+ *
+ * @listens Player#ratechange
+ */
+ updateLabel(event) {
+ if (this.playbackRateSupported()) {
+ this.labelEl_.textContent = this.player().playbackRate() + 'x';
+ }
+ }
+ }
+
+ /**
+ * The text that should display over the `PlaybackRateMenuButton`s controls.
+ *
+ * Added for localization.
+ *
+ * @type {string}
+ * @protected
+ */
+ PlaybackRateMenuButton.prototype.controlText_ = 'Playback Rate';
+ Component$1.registerComponent('PlaybackRateMenuButton', PlaybackRateMenuButton);
+
+ /**
+ * @file spacer.js
+ */
+
+ /**
+ * Just an empty spacer element that can be used as an append point for plugins, etc.
+ * Also can be used to create space between elements when necessary.
+ *
+ * @extends Component
+ */
+ class Spacer extends Component$1 {
+ /**
+ * Builds the default DOM `className`.
+ *
+ * @return {string}
+ * The DOM `className` for this object.
+ */
+ buildCSSClass() {
+ return `vjs-spacer ${super.buildCSSClass()}`;
+ }
+
+ /**
+ * Create the `Component`'s DOM element
+ *
+ * @return {Element}
+ * The element that was created.
+ */
+ createEl(tag = 'div', props = {}, attributes = {}) {
+ if (!props.className) {
+ props.className = this.buildCSSClass();
+ }
+ return super.createEl(tag, props, attributes);
+ }
+ }
+ Component$1.registerComponent('Spacer', Spacer);
+
+ /**
+ * @file custom-control-spacer.js
+ */
+
+ /**
+ * Spacer specifically meant to be used as an insertion point for new plugins, etc.
+ *
+ * @extends Spacer
+ */
+ class CustomControlSpacer extends Spacer {
+ /**
+ * Builds the default DOM `className`.
+ *
+ * @return {string}
+ * The DOM `className` for this object.
+ */
+ buildCSSClass() {
+ return `vjs-custom-control-spacer ${super.buildCSSClass()}`;
+ }
+
+ /**
+ * Create the `Component`'s DOM element
+ *
+ * @return {Element}
+ * The element that was created.
+ */
+ createEl() {
+ return super.createEl('div', {
+ className: this.buildCSSClass(),
+ // No-flex/table-cell mode requires there be some content
+ // in the cell to fill the remaining space of the table.
+ textContent: '\u00a0'
+ });
+ }
+ }
+ Component$1.registerComponent('CustomControlSpacer', CustomControlSpacer);
+
+ /**
+ * @file control-bar.js
+ */
+
+ /**
+ * Container of main controls.
+ *
+ * @extends Component
+ */
+ class ControlBar extends Component$1 {
+ /**
+ * Create the `Component`'s DOM element
+ *
+ * @return {Element}
+ * The element that was created.
+ */
+ createEl() {
+ return super.createEl('div', {
+ className: 'vjs-control-bar',
+ dir: 'ltr'
+ });
+ }
+ }
+
+ /**
+ * Default options for `ControlBar`
+ *
+ * @type {Object}
+ * @private
+ */
+ ControlBar.prototype.options_ = {
+ children: ['playToggle', 'skipBackward', 'skipForward', 'volumePanel', 'currentTimeDisplay', 'timeDivider', 'durationDisplay', 'progressControl', 'liveDisplay', 'seekToLive', 'remainingTimeDisplay', 'customControlSpacer', 'playbackRateMenuButton', 'chaptersButton', 'descriptionsButton', 'subsCapsButton', 'audioTrackButton', 'pictureInPictureToggle', 'fullscreenToggle']
+ };
+ Component$1.registerComponent('ControlBar', ControlBar);
+
+ /**
+ * @file error-display.js
+ */
+
+ /**
+ * A display that indicates an error has occurred. This means that the video
+ * is unplayable.
+ *
+ * @extends ModalDialog
+ */
+ class ErrorDisplay extends ModalDialog {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('./player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ */
+ constructor(player, options) {
+ super(player, options);
+ this.on(player, 'error', e => {
+ this.open(e);
+ });
+ }
+
+ /**
+ * Builds the default DOM `className`.
+ *
+ * @return {string}
+ * The DOM `className` for this object.
+ *
+ * @deprecated Since version 5.
+ */
+ buildCSSClass() {
+ return `vjs-error-display ${super.buildCSSClass()}`;
+ }
+
+ /**
+ * Gets the localized error message based on the `Player`s error.
+ *
+ * @return {string}
+ * The `Player`s error message localized or an empty string.
+ */
+ content() {
+ const error = this.player().error();
+ return error ? this.localize(error.message) : '';
+ }
+ }
+
+ /**
+ * The default options for an `ErrorDisplay`.
+ *
+ * @private
+ */
+ ErrorDisplay.prototype.options_ = Object.assign({}, ModalDialog.prototype.options_, {
+ pauseOnOpen: false,
+ fillAlways: true,
+ temporary: false,
+ uncloseable: true
+ });
+ Component$1.registerComponent('ErrorDisplay', ErrorDisplay);
+
+ /**
+ * @file text-track-settings.js
+ */
+ const LOCAL_STORAGE_KEY$1 = 'vjs-text-track-settings';
+ const COLOR_BLACK = ['#000', 'Black'];
+ const COLOR_BLUE = ['#00F', 'Blue'];
+ const COLOR_CYAN = ['#0FF', 'Cyan'];
+ const COLOR_GREEN = ['#0F0', 'Green'];
+ const COLOR_MAGENTA = ['#F0F', 'Magenta'];
+ const COLOR_RED = ['#F00', 'Red'];
+ const COLOR_WHITE = ['#FFF', 'White'];
+ const COLOR_YELLOW = ['#FF0', 'Yellow'];
+ const OPACITY_OPAQUE = ['1', 'Opaque'];
+ const OPACITY_SEMI = ['0.5', 'Semi-Transparent'];
+ const OPACITY_TRANS = ['0', 'Transparent'];
+
+ // Configuration for the various <select> elements in the DOM of this component.
+ //
+ // Possible keys include:
+ //
+ // `default`:
+ // The default option index. Only needs to be provided if not zero.
+ // `parser`:
+ // A function which is used to parse the value from the selected option in
+ // a customized way.
+ // `selector`:
+ // The selector used to find the associated <select> element.
+ const selectConfigs = {
+ backgroundColor: {
+ selector: '.vjs-bg-color > select',
+ id: 'captions-background-color-%s',
+ label: 'Color',
+ options: [COLOR_BLACK, COLOR_WHITE, COLOR_RED, COLOR_GREEN, COLOR_BLUE, COLOR_YELLOW, COLOR_MAGENTA, COLOR_CYAN]
+ },
+ backgroundOpacity: {
+ selector: '.vjs-bg-opacity > select',
+ id: 'captions-background-opacity-%s',
+ label: 'Opacity',
+ options: [OPACITY_OPAQUE, OPACITY_SEMI, OPACITY_TRANS]
+ },
+ color: {
+ selector: '.vjs-text-color > select',
+ id: 'captions-foreground-color-%s',
+ label: 'Color',
+ options: [COLOR_WHITE, COLOR_BLACK, COLOR_RED, COLOR_GREEN, COLOR_BLUE, COLOR_YELLOW, COLOR_MAGENTA, COLOR_CYAN]
+ },
+ edgeStyle: {
+ selector: '.vjs-edge-style > select',
+ id: '%s',
+ label: 'Text Edge Style',
+ options: [['none', 'None'], ['raised', 'Raised'], ['depressed', 'Depressed'], ['uniform', 'Uniform'], ['dropshadow', 'Drop shadow']]
+ },
+ fontFamily: {
+ selector: '.vjs-font-family > select',
+ id: 'captions-font-family-%s',
+ label: 'Font Family',
+ options: [['proportionalSansSerif', 'Proportional Sans-Serif'], ['monospaceSansSerif', 'Monospace Sans-Serif'], ['proportionalSerif', 'Proportional Serif'], ['monospaceSerif', 'Monospace Serif'], ['casual', 'Casual'], ['script', 'Script'], ['small-caps', 'Small Caps']]
+ },
+ fontPercent: {
+ selector: '.vjs-font-percent > select',
+ id: 'captions-font-size-%s',
+ label: 'Font Size',
+ options: [['0.50', '50%'], ['0.75', '75%'], ['1.00', '100%'], ['1.25', '125%'], ['1.50', '150%'], ['1.75', '175%'], ['2.00', '200%'], ['3.00', '300%'], ['4.00', '400%']],
+ default: 2,
+ parser: v => v === '1.00' ? null : Number(v)
+ },
+ textOpacity: {
+ selector: '.vjs-text-opacity > select',
+ id: 'captions-foreground-opacity-%s',
+ label: 'Opacity',
+ options: [OPACITY_OPAQUE, OPACITY_SEMI]
+ },
+ // Options for this object are defined below.
+ windowColor: {
+ selector: '.vjs-window-color > select',
+ id: 'captions-window-color-%s',
+ label: 'Color'
+ },
+ // Options for this object are defined below.
+ windowOpacity: {
+ selector: '.vjs-window-opacity > select',
+ id: 'captions-window-opacity-%s',
+ label: 'Opacity',
+ options: [OPACITY_TRANS, OPACITY_SEMI, OPACITY_OPAQUE]
+ }
+ };
+ selectConfigs.windowColor.options = selectConfigs.backgroundColor.options;
+
+ /**
+ * Get the actual value of an option.
+ *
+ * @param {string} value
+ * The value to get
+ *
+ * @param {Function} [parser]
+ * Optional function to adjust the value.
+ *
+ * @return {*}
+ * - Will be `undefined` if no value exists
+ * - Will be `undefined` if the given value is "none".
+ * - Will be the actual value otherwise.
+ *
+ * @private
+ */
+ function parseOptionValue(value, parser) {
+ if (parser) {
+ value = parser(value);
+ }
+ if (value && value !== 'none') {
+ return value;
+ }
+ }
+
+ /**
+ * Gets the value of the selected <option> element within a <select> element.
+ *
+ * @param {Element} el
+ * the element to look in
+ *
+ * @param {Function} [parser]
+ * Optional function to adjust the value.
+ *
+ * @return {*}
+ * - Will be `undefined` if no value exists
+ * - Will be `undefined` if the given value is "none".
+ * - Will be the actual value otherwise.
+ *
+ * @private
+ */
+ function getSelectedOptionValue(el, parser) {
+ const value = el.options[el.options.selectedIndex].value;
+ return parseOptionValue(value, parser);
+ }
+
+ /**
+ * Sets the selected <option> element within a <select> element based on a
+ * given value.
+ *
+ * @param {Element} el
+ * The element to look in.
+ *
+ * @param {string} value
+ * the property to look on.
+ *
+ * @param {Function} [parser]
+ * Optional function to adjust the value before comparing.
+ *
+ * @private
+ */
+ function setSelectedOption(el, value, parser) {
+ if (!value) {
+ return;
+ }
+ for (let i = 0; i < el.options.length; i++) {
+ if (parseOptionValue(el.options[i].value, parser) === value) {
+ el.selectedIndex = i;
+ break;
+ }
+ }
+ }
+
+ /**
+ * Manipulate Text Tracks settings.
+ *
+ * @extends ModalDialog
+ */
+ class TextTrackSettings extends ModalDialog {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('../player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ */
+ constructor(player, options) {
+ options.temporary = false;
+ super(player, options);
+ this.updateDisplay = this.updateDisplay.bind(this);
+
+ // fill the modal and pretend we have opened it
+ this.fill();
+ this.hasBeenOpened_ = this.hasBeenFilled_ = true;
+ this.endDialog = createEl('p', {
+ className: 'vjs-control-text',
+ textContent: this.localize('End of dialog window.')
+ });
+ this.el().appendChild(this.endDialog);
+ this.setDefaults();
+
+ // Grab `persistTextTrackSettings` from the player options if not passed in child options
+ if (options.persistTextTrackSettings === undefined) {
+ this.options_.persistTextTrackSettings = this.options_.playerOptions.persistTextTrackSettings;
+ }
+ this.on(this.$('.vjs-done-button'), 'click', () => {
+ this.saveSettings();
+ this.close();
+ });
+ this.on(this.$('.vjs-default-button'), 'click', () => {
+ this.setDefaults();
+ this.updateDisplay();
+ });
+ each(selectConfigs, config => {
+ this.on(this.$(config.selector), 'change', this.updateDisplay);
+ });
+ if (this.options_.persistTextTrackSettings) {
+ this.restoreSettings();
+ }
+ }
+ dispose() {
+ this.endDialog = null;
+ super.dispose();
+ }
+
+ /**
+ * Create a <select> element with configured options.
+ *
+ * @param {string} key
+ * Configuration key to use during creation.
+ *
+ * @param {string} [legendId]
+ * Id of associated <legend>.
+ *
+ * @param {string} [type=label]
+ * Type of labelling element, `label` or `legend`
+ *
+ * @return {string}
+ * An HTML string.
+ *
+ * @private
+ */
+ createElSelect_(key, legendId = '', type = 'label') {
+ const config = selectConfigs[key];
+ const id = config.id.replace('%s', this.id_);
+ const selectLabelledbyIds = [legendId, id].join(' ').trim();
+ const guid = `vjs_select_${newGUID()}`;
+ return [`<${type} id="${id}"${type === 'label' ? ` for="${guid}" class="vjs-label"` : ''}>`, this.localize(config.label), `</${type}>`, `<select aria-labelledby="${selectLabelledbyIds}" id="${guid}">`].concat(config.options.map(o => {
+ const optionId = id + '-' + o[1].replace(/\W+/g, '');
+ return [`<option id="${optionId}" value="${o[0]}" `, `aria-labelledby="${selectLabelledbyIds} ${optionId}">`, this.localize(o[1]), '</option>'].join('');
+ })).concat('</select>').join('');
+ }
+
+ /**
+ * Create foreground color element for the component
+ *
+ * @return {string}
+ * An HTML string.
+ *
+ * @private
+ */
+ createElFgColor_() {
+ const legendId = `captions-text-legend-${this.id_}`;
+ return ['<fieldset class="vjs-fg vjs-track-setting">', `<legend id="${legendId}">`, this.localize('Text'), '</legend>', '<span class="vjs-text-color">', this.createElSelect_('color', legendId), '</span>', '<span class="vjs-text-opacity vjs-opacity">', this.createElSelect_('textOpacity', legendId), '</span>', '</fieldset>'].join('');
+ }
+
+ /**
+ * Create background color element for the component
+ *
+ * @return {string}
+ * An HTML string.
+ *
+ * @private
+ */
+ createElBgColor_() {
+ const legendId = `captions-background-${this.id_}`;
+ return ['<fieldset class="vjs-bg vjs-track-setting">', `<legend id="${legendId}">`, this.localize('Text Background'), '</legend>', '<span class="vjs-bg-color">', this.createElSelect_('backgroundColor', legendId), '</span>', '<span class="vjs-bg-opacity vjs-opacity">', this.createElSelect_('backgroundOpacity', legendId), '</span>', '</fieldset>'].join('');
+ }
+
+ /**
+ * Create window color element for the component
+ *
+ * @return {string}
+ * An HTML string.
+ *
+ * @private
+ */
+ createElWinColor_() {
+ const legendId = `captions-window-${this.id_}`;
+ return ['<fieldset class="vjs-window vjs-track-setting">', `<legend id="${legendId}">`, this.localize('Caption Area Background'), '</legend>', '<span class="vjs-window-color">', this.createElSelect_('windowColor', legendId), '</span>', '<span class="vjs-window-opacity vjs-opacity">', this.createElSelect_('windowOpacity', legendId), '</span>', '</fieldset>'].join('');
+ }
+
+ /**
+ * Create color elements for the component
+ *
+ * @return {Element}
+ * The element that was created
+ *
+ * @private
+ */
+ createElColors_() {
+ return createEl('div', {
+ className: 'vjs-track-settings-colors',
+ innerHTML: [this.createElFgColor_(), this.createElBgColor_(), this.createElWinColor_()].join('')
+ });
+ }
+
+ /**
+ * Create font elements for the component
+ *
+ * @return {Element}
+ * The element that was created.
+ *
+ * @private
+ */
+ createElFont_() {
+ return createEl('div', {
+ className: 'vjs-track-settings-font',
+ innerHTML: ['<fieldset class="vjs-font-percent vjs-track-setting">', this.createElSelect_('fontPercent', '', 'legend'), '</fieldset>', '<fieldset class="vjs-edge-style vjs-track-setting">', this.createElSelect_('edgeStyle', '', 'legend'), '</fieldset>', '<fieldset class="vjs-font-family vjs-track-setting">', this.createElSelect_('fontFamily', '', 'legend'), '</fieldset>'].join('')
+ });
+ }
+
+ /**
+ * Create controls for the component
+ *
+ * @return {Element}
+ * The element that was created.
+ *
+ * @private
+ */
+ createElControls_() {
+ const defaultsDescription = this.localize('restore all settings to the default values');
+ return createEl('div', {
+ className: 'vjs-track-settings-controls',
+ innerHTML: [`<button type="button" class="vjs-default-button" title="${defaultsDescription}">`, this.localize('Reset'), `<span class="vjs-control-text"> ${defaultsDescription}</span>`, '</button>', `<button type="button" class="vjs-done-button">${this.localize('Done')}</button>`].join('')
+ });
+ }
+ content() {
+ return [this.createElColors_(), this.createElFont_(), this.createElControls_()];
+ }
+ label() {
+ return this.localize('Caption Settings Dialog');
+ }
+ description() {
+ return this.localize('Beginning of dialog window. Escape will cancel and close the window.');
+ }
+ buildCSSClass() {
+ return super.buildCSSClass() + ' vjs-text-track-settings';
+ }
+
+ /**
+ * Gets an object of text track settings (or null).
+ *
+ * @return {Object}
+ * An object with config values parsed from the DOM or localStorage.
+ */
+ getValues() {
+ return reduce(selectConfigs, (accum, config, key) => {
+ const value = getSelectedOptionValue(this.$(config.selector), config.parser);
+ if (value !== undefined) {
+ accum[key] = value;
+ }
+ return accum;
+ }, {});
+ }
+
+ /**
+ * Sets text track settings from an object of values.
+ *
+ * @param {Object} values
+ * An object with config values parsed from the DOM or localStorage.
+ */
+ setValues(values) {
+ each(selectConfigs, (config, key) => {
+ setSelectedOption(this.$(config.selector), values[key], config.parser);
+ });
+ }
+
+ /**
+ * Sets all `<select>` elements to their default values.
+ */
+ setDefaults() {
+ each(selectConfigs, config => {
+ const index = config.hasOwnProperty('default') ? config.default : 0;
+ this.$(config.selector).selectedIndex = index;
+ });
+ }
+
+ /**
+ * Restore texttrack settings from localStorage
+ */
+ restoreSettings() {
+ let values;
+ try {
+ values = JSON.parse(window.localStorage.getItem(LOCAL_STORAGE_KEY$1));
+ } catch (err) {
+ log$1.warn(err);
+ }
+ if (values) {
+ this.setValues(values);
+ }
+ }
+
+ /**
+ * Save text track settings to localStorage
+ */
+ saveSettings() {
+ if (!this.options_.persistTextTrackSettings) {
+ return;
+ }
+ const values = this.getValues();
+ try {
+ if (Object.keys(values).length) {
+ window.localStorage.setItem(LOCAL_STORAGE_KEY$1, JSON.stringify(values));
+ } else {
+ window.localStorage.removeItem(LOCAL_STORAGE_KEY$1);
+ }
+ } catch (err) {
+ log$1.warn(err);
+ }
+ }
+
+ /**
+ * Update display of text track settings
+ */
+ updateDisplay() {
+ const ttDisplay = this.player_.getChild('textTrackDisplay');
+ if (ttDisplay) {
+ ttDisplay.updateDisplay();
+ }
+ }
+
+ /**
+ * conditionally blur the element and refocus the captions button
+ *
+ * @private
+ */
+ conditionalBlur_() {
+ this.previouslyActiveEl_ = null;
+ const cb = this.player_.controlBar;
+ const subsCapsBtn = cb && cb.subsCapsButton;
+ const ccBtn = cb && cb.captionsButton;
+ if (subsCapsBtn) {
+ subsCapsBtn.focus();
+ } else if (ccBtn) {
+ ccBtn.focus();
+ }
+ }
+
+ /**
+ * Repopulate dialog with new localizations on languagechange
+ */
+ handleLanguagechange() {
+ this.fill();
+ }
+ }
+ Component$1.registerComponent('TextTrackSettings', TextTrackSettings);
+
+ /**
+ * @file resize-manager.js
+ */
+
+ /**
+ * A Resize Manager. It is in charge of triggering `playerresize` on the player in the right conditions.
+ *
+ * It'll either create an iframe and use a debounced resize handler on it or use the new {@link https://wicg.github.io/ResizeObserver/|ResizeObserver}.
+ *
+ * If the ResizeObserver is available natively, it will be used. A polyfill can be passed in as an option.
+ * If a `playerresize` event is not needed, the ResizeManager component can be removed from the player, see the example below.
+ *
+ * @example <caption>How to disable the resize manager</caption>
+ * const player = videojs('#vid', {
+ * resizeManager: false
+ * });
+ *
+ * @see {@link https://wicg.github.io/ResizeObserver/|ResizeObserver specification}
+ *
+ * @extends Component
+ */
+ class ResizeManager extends Component$1 {
+ /**
+ * Create the ResizeManager.
+ *
+ * @param {Object} player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of ResizeManager options.
+ *
+ * @param {Object} [options.ResizeObserver]
+ * A polyfill for ResizeObserver can be passed in here.
+ * If this is set to null it will ignore the native ResizeObserver and fall back to the iframe fallback.
+ */
+ constructor(player, options) {
+ let RESIZE_OBSERVER_AVAILABLE = options.ResizeObserver || window.ResizeObserver;
+
+ // if `null` was passed, we want to disable the ResizeObserver
+ if (options.ResizeObserver === null) {
+ RESIZE_OBSERVER_AVAILABLE = false;
+ }
+
+ // Only create an element when ResizeObserver isn't available
+ const options_ = merge$2({
+ createEl: !RESIZE_OBSERVER_AVAILABLE,
+ reportTouchActivity: false
+ }, options);
+ super(player, options_);
+ this.ResizeObserver = options.ResizeObserver || window.ResizeObserver;
+ this.loadListener_ = null;
+ this.resizeObserver_ = null;
+ this.debouncedHandler_ = debounce(() => {
+ this.resizeHandler();
+ }, 100, false, this);
+ if (RESIZE_OBSERVER_AVAILABLE) {
+ this.resizeObserver_ = new this.ResizeObserver(this.debouncedHandler_);
+ this.resizeObserver_.observe(player.el());
+ } else {
+ this.loadListener_ = () => {
+ if (!this.el_ || !this.el_.contentWindow) {
+ return;
+ }
+ const debouncedHandler_ = this.debouncedHandler_;
+ let unloadListener_ = this.unloadListener_ = function () {
+ off(this, 'resize', debouncedHandler_);
+ off(this, 'unload', unloadListener_);
+ unloadListener_ = null;
+ };
+
+ // safari and edge can unload the iframe before resizemanager dispose
+ // we have to dispose of event handlers correctly before that happens
+ on(this.el_.contentWindow, 'unload', unloadListener_);
+ on(this.el_.contentWindow, 'resize', debouncedHandler_);
+ };
+ this.one('load', this.loadListener_);
+ }
+ }
+ createEl() {
+ return super.createEl('iframe', {
+ className: 'vjs-resize-manager',
+ tabIndex: -1,
+ title: this.localize('No content')
+ }, {
+ 'aria-hidden': 'true'
+ });
+ }
+
+ /**
+ * Called when a resize is triggered on the iframe or a resize is observed via the ResizeObserver
+ *
+ * @fires Player#playerresize
+ */
+ resizeHandler() {
+ /**
+ * Called when the player size has changed
+ *
+ * @event Player#playerresize
+ * @type {Event}
+ */
+ // make sure player is still around to trigger
+ // prevents this from causing an error after dispose
+ if (!this.player_ || !this.player_.trigger) {
+ return;
+ }
+ this.player_.trigger('playerresize');
+ }
+ dispose() {
+ if (this.debouncedHandler_) {
+ this.debouncedHandler_.cancel();
+ }
+ if (this.resizeObserver_) {
+ if (this.player_.el()) {
+ this.resizeObserver_.unobserve(this.player_.el());
+ }
+ this.resizeObserver_.disconnect();
+ }
+ if (this.loadListener_) {
+ this.off('load', this.loadListener_);
+ }
+ if (this.el_ && this.el_.contentWindow && this.unloadListener_) {
+ this.unloadListener_.call(this.el_.contentWindow);
+ }
+ this.ResizeObserver = null;
+ this.resizeObserver = null;
+ this.debouncedHandler_ = null;
+ this.loadListener_ = null;
+ super.dispose();
+ }
+ }
+ Component$1.registerComponent('ResizeManager', ResizeManager);
+
+ const defaults = {
+ trackingThreshold: 20,
+ liveTolerance: 15
+ };
+
+ /*
+ track when we are at the live edge, and other helpers for live playback */
+
+ /**
+ * A class for checking live current time and determining when the player
+ * is at or behind the live edge.
+ */
+ class LiveTracker extends Component$1 {
+ /**
+ * Creates an instance of this class.
+ *
+ * @param { import('./player').default } player
+ * The `Player` that this class should be attached to.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ *
+ * @param {number} [options.trackingThreshold=20]
+ * Number of seconds of live window (seekableEnd - seekableStart) that
+ * media needs to have before the liveui will be shown.
+ *
+ * @param {number} [options.liveTolerance=15]
+ * Number of seconds behind live that we have to be
+ * before we will be considered non-live. Note that this will only
+ * be used when playing at the live edge. This allows large seekable end
+ * changes to not effect whether we are live or not.
+ */
+ constructor(player, options) {
+ // LiveTracker does not need an element
+ const options_ = merge$2(defaults, options, {
+ createEl: false
+ });
+ super(player, options_);
+ this.trackLiveHandler_ = () => this.trackLive_();
+ this.handlePlay_ = e => this.handlePlay(e);
+ this.handleFirstTimeupdate_ = e => this.handleFirstTimeupdate(e);
+ this.handleSeeked_ = e => this.handleSeeked(e);
+ this.seekToLiveEdge_ = e => this.seekToLiveEdge(e);
+ this.reset_();
+ this.on(this.player_, 'durationchange', e => this.handleDurationchange(e));
+ // we should try to toggle tracking on canplay as native playback engines, like Safari
+ // may not have the proper values for things like seekableEnd until then
+ this.on(this.player_, 'canplay', () => this.toggleTracking());
+ }
+
+ /**
+ * all the functionality for tracking when seek end changes
+ * and for tracking how far past seek end we should be
+ */
+ trackLive_() {
+ const seekable = this.player_.seekable();
+
+ // skip undefined seekable
+ if (!seekable || !seekable.length) {
+ return;
+ }
+ const newTime = Number(window.performance.now().toFixed(4));
+ const deltaTime = this.lastTime_ === -1 ? 0 : (newTime - this.lastTime_) / 1000;
+ this.lastTime_ = newTime;
+ this.pastSeekEnd_ = this.pastSeekEnd() + deltaTime;
+ const liveCurrentTime = this.liveCurrentTime();
+ const currentTime = this.player_.currentTime();
+
+ // we are behind live if any are true
+ // 1. the player is paused
+ // 2. the user seeked to a location 2 seconds away from live
+ // 3. the difference between live and current time is greater
+ // liveTolerance which defaults to 15s
+ let isBehind = this.player_.paused() || this.seekedBehindLive_ || Math.abs(liveCurrentTime - currentTime) > this.options_.liveTolerance;
+
+ // we cannot be behind if
+ // 1. until we have not seen a timeupdate yet
+ // 2. liveCurrentTime is Infinity, which happens on Android and Native Safari
+ if (!this.timeupdateSeen_ || liveCurrentTime === Infinity) {
+ isBehind = false;
+ }
+ if (isBehind !== this.behindLiveEdge_) {
+ this.behindLiveEdge_ = isBehind;
+ this.trigger('liveedgechange');
+ }
+ }
+
+ /**
+ * handle a durationchange event on the player
+ * and start/stop tracking accordingly.
+ */
+ handleDurationchange() {
+ this.toggleTracking();
+ }
+
+ /**
+ * start/stop tracking
+ */
+ toggleTracking() {
+ if (this.player_.duration() === Infinity && this.liveWindow() >= this.options_.trackingThreshold) {
+ if (this.player_.options_.liveui) {
+ this.player_.addClass('vjs-liveui');
+ }
+ this.startTracking();
+ } else {
+ this.player_.removeClass('vjs-liveui');
+ this.stopTracking();
+ }
+ }
+
+ /**
+ * start tracking live playback
+ */
+ startTracking() {
+ if (this.isTracking()) {
+ return;
+ }
+
+ // If we haven't seen a timeupdate, we need to check whether playback
+ // began before this component started tracking. This can happen commonly
+ // when using autoplay.
+ if (!this.timeupdateSeen_) {
+ this.timeupdateSeen_ = this.player_.hasStarted();
+ }
+ this.trackingInterval_ = this.setInterval(this.trackLiveHandler_, UPDATE_REFRESH_INTERVAL);
+ this.trackLive_();
+ this.on(this.player_, ['play', 'pause'], this.trackLiveHandler_);
+ if (!this.timeupdateSeen_) {
+ this.one(this.player_, 'play', this.handlePlay_);
+ this.one(this.player_, 'timeupdate', this.handleFirstTimeupdate_);
+ } else {
+ this.on(this.player_, 'seeked', this.handleSeeked_);
+ }
+ }
+
+ /**
+ * handle the first timeupdate on the player if it wasn't already playing
+ * when live tracker started tracking.
+ */
+ handleFirstTimeupdate() {
+ this.timeupdateSeen_ = true;
+ this.on(this.player_, 'seeked', this.handleSeeked_);
+ }
+
+ /**
+ * Keep track of what time a seek starts, and listen for seeked
+ * to find where a seek ends.
+ */
+ handleSeeked() {
+ const timeDiff = Math.abs(this.liveCurrentTime() - this.player_.currentTime());
+ this.seekedBehindLive_ = this.nextSeekedFromUser_ && timeDiff > 2;
+ this.nextSeekedFromUser_ = false;
+ this.trackLive_();
+ }
+
+ /**
+ * handle the first play on the player, and make sure that we seek
+ * right to the live edge.
+ */
+ handlePlay() {
+ this.one(this.player_, 'timeupdate', this.seekToLiveEdge_);
+ }
+
+ /**
+ * Stop tracking, and set all internal variables to
+ * their initial value.
+ */
+ reset_() {
+ this.lastTime_ = -1;
+ this.pastSeekEnd_ = 0;
+ this.lastSeekEnd_ = -1;
+ this.behindLiveEdge_ = true;
+ this.timeupdateSeen_ = false;
+ this.seekedBehindLive_ = false;
+ this.nextSeekedFromUser_ = false;
+ this.clearInterval(this.trackingInterval_);
+ this.trackingInterval_ = null;
+ this.off(this.player_, ['play', 'pause'], this.trackLiveHandler_);
+ this.off(this.player_, 'seeked', this.handleSeeked_);
+ this.off(this.player_, 'play', this.handlePlay_);
+ this.off(this.player_, 'timeupdate', this.handleFirstTimeupdate_);
+ this.off(this.player_, 'timeupdate', this.seekToLiveEdge_);
+ }
+
+ /**
+ * The next seeked event is from the user. Meaning that any seek
+ * > 2s behind live will be considered behind live for real and
+ * liveTolerance will be ignored.
+ */
+ nextSeekedFromUser() {
+ this.nextSeekedFromUser_ = true;
+ }
+
+ /**
+ * stop tracking live playback
+ */
+ stopTracking() {
+ if (!this.isTracking()) {
+ return;
+ }
+ this.reset_();
+ this.trigger('liveedgechange');
+ }
+
+ /**
+ * A helper to get the player seekable end
+ * so that we don't have to null check everywhere
+ *
+ * @return {number}
+ * The furthest seekable end or Infinity.
+ */
+ seekableEnd() {
+ const seekable = this.player_.seekable();
+ const seekableEnds = [];
+ let i = seekable ? seekable.length : 0;
+ while (i--) {
+ seekableEnds.push(seekable.end(i));
+ }
+
+ // grab the furthest seekable end after sorting, or if there are none
+ // default to Infinity
+ return seekableEnds.length ? seekableEnds.sort()[seekableEnds.length - 1] : Infinity;
+ }
+
+ /**
+ * A helper to get the player seekable start
+ * so that we don't have to null check everywhere
+ *
+ * @return {number}
+ * The earliest seekable start or 0.
+ */
+ seekableStart() {
+ const seekable = this.player_.seekable();
+ const seekableStarts = [];
+ let i = seekable ? seekable.length : 0;
+ while (i--) {
+ seekableStarts.push(seekable.start(i));
+ }
+
+ // grab the first seekable start after sorting, or if there are none
+ // default to 0
+ return seekableStarts.length ? seekableStarts.sort()[0] : 0;
+ }
+
+ /**
+ * Get the live time window aka
+ * the amount of time between seekable start and
+ * live current time.
+ *
+ * @return {number}
+ * The amount of seconds that are seekable in
+ * the live video.
+ */
+ liveWindow() {
+ const liveCurrentTime = this.liveCurrentTime();
+
+ // if liveCurrenTime is Infinity then we don't have a liveWindow at all
+ if (liveCurrentTime === Infinity) {
+ return 0;
+ }
+ return liveCurrentTime - this.seekableStart();
+ }
+
+ /**
+ * Determines if the player is live, only checks if this component
+ * is tracking live playback or not
+ *
+ * @return {boolean}
+ * Whether liveTracker is tracking
+ */
+ isLive() {
+ return this.isTracking();
+ }
+
+ /**
+ * Determines if currentTime is at the live edge and won't fall behind
+ * on each seekableendchange
+ *
+ * @return {boolean}
+ * Whether playback is at the live edge
+ */
+ atLiveEdge() {
+ return !this.behindLiveEdge();
+ }
+
+ /**
+ * get what we expect the live current time to be
+ *
+ * @return {number}
+ * The expected live current time
+ */
+ liveCurrentTime() {
+ return this.pastSeekEnd() + this.seekableEnd();
+ }
+
+ /**
+ * The number of seconds that have occurred after seekable end
+ * changed. This will be reset to 0 once seekable end changes.
+ *
+ * @return {number}
+ * Seconds past the current seekable end
+ */
+ pastSeekEnd() {
+ const seekableEnd = this.seekableEnd();
+ if (this.lastSeekEnd_ !== -1 && seekableEnd !== this.lastSeekEnd_) {
+ this.pastSeekEnd_ = 0;
+ }
+ this.lastSeekEnd_ = seekableEnd;
+ return this.pastSeekEnd_;
+ }
+
+ /**
+ * If we are currently behind the live edge, aka currentTime will be
+ * behind on a seekableendchange
+ *
+ * @return {boolean}
+ * If we are behind the live edge
+ */
+ behindLiveEdge() {
+ return this.behindLiveEdge_;
+ }
+
+ /**
+ * Whether live tracker is currently tracking or not.
+ */
+ isTracking() {
+ return typeof this.trackingInterval_ === 'number';
+ }
+
+ /**
+ * Seek to the live edge if we are behind the live edge
+ */
+ seekToLiveEdge() {
+ this.seekedBehindLive_ = false;
+ if (this.atLiveEdge()) {
+ return;
+ }
+ this.nextSeekedFromUser_ = false;
+ this.player_.currentTime(this.liveCurrentTime());
+ }
+
+ /**
+ * Dispose of liveTracker
+ */
+ dispose() {
+ this.stopTracking();
+ super.dispose();
+ }
+ }
+ Component$1.registerComponent('LiveTracker', LiveTracker);
+
+ /**
+ * Displays an element over the player which contains an optional title and
+ * description for the current content.
+ *
+ * Much of the code for this component originated in the now obsolete
+ * videojs-dock plugin: https://github.com/brightcove/videojs-dock/
+ *
+ * @extends Component
+ */
+ class TitleBar extends Component$1 {
+ constructor(player, options) {
+ super(player, options);
+ this.on('statechanged', e => this.updateDom_());
+ this.updateDom_();
+ }
+
+ /**
+ * Create the `TitleBar`'s DOM element
+ *
+ * @return {Element}
+ * The element that was created.
+ */
+ createEl() {
+ this.els = {
+ title: createEl('div', {
+ className: 'vjs-title-bar-title',
+ id: `vjs-title-bar-title-${newGUID()}`
+ }),
+ description: createEl('div', {
+ className: 'vjs-title-bar-description',
+ id: `vjs-title-bar-description-${newGUID()}`
+ })
+ };
+ return createEl('div', {
+ className: 'vjs-title-bar'
+ }, {}, values$1(this.els));
+ }
+
+ /**
+ * Updates the DOM based on the component's state object.
+ */
+ updateDom_() {
+ const tech = this.player_.tech_;
+ const techEl = tech && tech.el_;
+ const techAriaAttrs = {
+ title: 'aria-labelledby',
+ description: 'aria-describedby'
+ };
+ ['title', 'description'].forEach(k => {
+ const value = this.state[k];
+ const el = this.els[k];
+ const techAriaAttr = techAriaAttrs[k];
+ emptyEl(el);
+ if (value) {
+ textContent(el, value);
+ }
+
+ // If there is a tech element available, update its ARIA attributes
+ // according to whether a title and/or description have been provided.
+ if (techEl) {
+ techEl.removeAttribute(techAriaAttr);
+ if (value) {
+ techEl.setAttribute(techAriaAttr, el.id);
+ }
+ }
+ });
+ if (this.state.title || this.state.description) {
+ this.show();
+ } else {
+ this.hide();
+ }
+ }
+
+ /**
+ * Update the contents of the title bar component with new title and
+ * description text.
+ *
+ * If both title and description are missing, the title bar will be hidden.
+ *
+ * If either title or description are present, the title bar will be visible.
+ *
+ * NOTE: Any previously set value will be preserved. To unset a previously
+ * set value, you must pass an empty string or null.
+ *
+ * For example:
+ *
+ * ```
+ * update({title: 'foo', description: 'bar'}) // title: 'foo', description: 'bar'
+ * update({description: 'bar2'}) // title: 'foo', description: 'bar2'
+ * update({title: ''}) // title: '', description: 'bar2'
+ * update({title: 'foo', description: null}) // title: 'foo', description: null
+ * ```
+ *
+ * @param {Object} [options={}]
+ * An options object. When empty, the title bar will be hidden.
+ *
+ * @param {string} [options.title]
+ * A title to display in the title bar.
+ *
+ * @param {string} [options.description]
+ * A description to display in the title bar.
+ */
+ update(options) {
+ this.setState(options);
+ }
+
+ /**
+ * Dispose the component.
+ */
+ dispose() {
+ const tech = this.player_.tech_;
+ const techEl = tech && tech.el_;
+ if (techEl) {
+ techEl.removeAttribute('aria-labelledby');
+ techEl.removeAttribute('aria-describedby');
+ }
+ super.dispose();
+ this.els = null;
+ }
+ }
+ Component$1.registerComponent('TitleBar', TitleBar);
+
+ /**
+ * This function is used to fire a sourceset when there is something
+ * similar to `mediaEl.load()` being called. It will try to find the source via
+ * the `src` attribute and then the `<source>` elements. It will then fire `sourceset`
+ * with the source that was found or empty string if we cannot know. If it cannot
+ * find a source then `sourceset` will not be fired.
+ *
+ * @param { import('./html5').default } tech
+ * The tech object that sourceset was setup on
+ *
+ * @return {boolean}
+ * returns false if the sourceset was not fired and true otherwise.
+ */
+ const sourcesetLoad = tech => {
+ const el = tech.el();
+
+ // if `el.src` is set, that source will be loaded.
+ if (el.hasAttribute('src')) {
+ tech.triggerSourceset(el.src);
+ return true;
+ }
+
+ /**
+ * Since there isn't a src property on the media element, source elements will be used for
+ * implementing the source selection algorithm. This happens asynchronously and
+ * for most cases were there is more than one source we cannot tell what source will
+ * be loaded, without re-implementing the source selection algorithm. At this time we are not
+ * going to do that. There are three special cases that we do handle here though:
+ *
+ * 1. If there are no sources, do not fire `sourceset`.
+ * 2. If there is only one `<source>` with a `src` property/attribute that is our `src`
+ * 3. If there is more than one `<source>` but all of them have the same `src` url.
+ * That will be our src.
+ */
+ const sources = tech.$$('source');
+ const srcUrls = [];
+ let src = '';
+
+ // if there are no sources, do not fire sourceset
+ if (!sources.length) {
+ return false;
+ }
+
+ // only count valid/non-duplicate source elements
+ for (let i = 0; i < sources.length; i++) {
+ const url = sources[i].src;
+ if (url && srcUrls.indexOf(url) === -1) {
+ srcUrls.push(url);
+ }
+ }
+
+ // there were no valid sources
+ if (!srcUrls.length) {
+ return false;
+ }
+
+ // there is only one valid source element url
+ // use that
+ if (srcUrls.length === 1) {
+ src = srcUrls[0];
+ }
+ tech.triggerSourceset(src);
+ return true;
+ };
+
+ /**
+ * our implementation of an `innerHTML` descriptor for browsers
+ * that do not have one.
+ */
+ const innerHTMLDescriptorPolyfill = Object.defineProperty({}, 'innerHTML', {
+ get() {
+ return this.cloneNode(true).innerHTML;
+ },
+ set(v) {
+ // make a dummy node to use innerHTML on
+ const dummy = document.createElement(this.nodeName.toLowerCase());
+
+ // set innerHTML to the value provided
+ dummy.innerHTML = v;
+
+ // make a document fragment to hold the nodes from dummy
+ const docFrag = document.createDocumentFragment();
+
+ // copy all of the nodes created by the innerHTML on dummy
+ // to the document fragment
+ while (dummy.childNodes.length) {
+ docFrag.appendChild(dummy.childNodes[0]);
+ }
+
+ // remove content
+ this.innerText = '';
+
+ // now we add all of that html in one by appending the
+ // document fragment. This is how innerHTML does it.
+ window.Element.prototype.appendChild.call(this, docFrag);
+
+ // then return the result that innerHTML's setter would
+ return this.innerHTML;
+ }
+ });
+
+ /**
+ * Get a property descriptor given a list of priorities and the
+ * property to get.
+ */
+ const getDescriptor = (priority, prop) => {
+ let descriptor = {};
+ for (let i = 0; i < priority.length; i++) {
+ descriptor = Object.getOwnPropertyDescriptor(priority[i], prop);
+ if (descriptor && descriptor.set && descriptor.get) {
+ break;
+ }
+ }
+ descriptor.enumerable = true;
+ descriptor.configurable = true;
+ return descriptor;
+ };
+ const getInnerHTMLDescriptor = tech => getDescriptor([tech.el(), window.HTMLMediaElement.prototype, window.Element.prototype, innerHTMLDescriptorPolyfill], 'innerHTML');
+
+ /**
+ * Patches browser internal functions so that we can tell synchronously
+ * if a `<source>` was appended to the media element. For some reason this
+ * causes a `sourceset` if the the media element is ready and has no source.
+ * This happens when:
+ * - The page has just loaded and the media element does not have a source.
+ * - The media element was emptied of all sources, then `load()` was called.
+ *
+ * It does this by patching the following functions/properties when they are supported:
+ *
+ * - `append()` - can be used to add a `<source>` element to the media element
+ * - `appendChild()` - can be used to add a `<source>` element to the media element
+ * - `insertAdjacentHTML()` - can be used to add a `<source>` element to the media element
+ * - `innerHTML` - can be used to add a `<source>` element to the media element
+ *
+ * @param {Html5} tech
+ * The tech object that sourceset is being setup on.
+ */
+ const firstSourceWatch = function (tech) {
+ const el = tech.el();
+
+ // make sure firstSourceWatch isn't setup twice.
+ if (el.resetSourceWatch_) {
+ return;
+ }
+ const old = {};
+ const innerDescriptor = getInnerHTMLDescriptor(tech);
+ const appendWrapper = appendFn => (...args) => {
+ const retval = appendFn.apply(el, args);
+ sourcesetLoad(tech);
+ return retval;
+ };
+ ['append', 'appendChild', 'insertAdjacentHTML'].forEach(k => {
+ if (!el[k]) {
+ return;
+ }
+
+ // store the old function
+ old[k] = el[k];
+
+ // call the old function with a sourceset if a source
+ // was loaded
+ el[k] = appendWrapper(old[k]);
+ });
+ Object.defineProperty(el, 'innerHTML', merge$2(innerDescriptor, {
+ set: appendWrapper(innerDescriptor.set)
+ }));
+ el.resetSourceWatch_ = () => {
+ el.resetSourceWatch_ = null;
+ Object.keys(old).forEach(k => {
+ el[k] = old[k];
+ });
+ Object.defineProperty(el, 'innerHTML', innerDescriptor);
+ };
+
+ // on the first sourceset, we need to revert our changes
+ tech.one('sourceset', el.resetSourceWatch_);
+ };
+
+ /**
+ * our implementation of a `src` descriptor for browsers
+ * that do not have one
+ */
+ const srcDescriptorPolyfill = Object.defineProperty({}, 'src', {
+ get() {
+ if (this.hasAttribute('src')) {
+ return getAbsoluteURL(window.Element.prototype.getAttribute.call(this, 'src'));
+ }
+ return '';
+ },
+ set(v) {
+ window.Element.prototype.setAttribute.call(this, 'src', v);
+ return v;
+ }
+ });
+ const getSrcDescriptor = tech => getDescriptor([tech.el(), window.HTMLMediaElement.prototype, srcDescriptorPolyfill], 'src');
+
+ /**
+ * setup `sourceset` handling on the `Html5` tech. This function
+ * patches the following element properties/functions:
+ *
+ * - `src` - to determine when `src` is set
+ * - `setAttribute()` - to determine when `src` is set
+ * - `load()` - this re-triggers the source selection algorithm, and can
+ * cause a sourceset.
+ *
+ * If there is no source when we are adding `sourceset` support or during a `load()`
+ * we also patch the functions listed in `firstSourceWatch`.
+ *
+ * @param {Html5} tech
+ * The tech to patch
+ */
+ const setupSourceset = function (tech) {
+ if (!tech.featuresSourceset) {
+ return;
+ }
+ const el = tech.el();
+
+ // make sure sourceset isn't setup twice.
+ if (el.resetSourceset_) {
+ return;
+ }
+ const srcDescriptor = getSrcDescriptor(tech);
+ const oldSetAttribute = el.setAttribute;
+ const oldLoad = el.load;
+ Object.defineProperty(el, 'src', merge$2(srcDescriptor, {
+ set: v => {
+ const retval = srcDescriptor.set.call(el, v);
+
+ // we use the getter here to get the actual value set on src
+ tech.triggerSourceset(el.src);
+ return retval;
+ }
+ }));
+ el.setAttribute = (n, v) => {
+ const retval = oldSetAttribute.call(el, n, v);
+ if (/src/i.test(n)) {
+ tech.triggerSourceset(el.src);
+ }
+ return retval;
+ };
+ el.load = () => {
+ const retval = oldLoad.call(el);
+
+ // if load was called, but there was no source to fire
+ // sourceset on. We have to watch for a source append
+ // as that can trigger a `sourceset` when the media element
+ // has no source
+ if (!sourcesetLoad(tech)) {
+ tech.triggerSourceset('');
+ firstSourceWatch(tech);
+ }
+ return retval;
+ };
+ if (el.currentSrc) {
+ tech.triggerSourceset(el.currentSrc);
+ } else if (!sourcesetLoad(tech)) {
+ firstSourceWatch(tech);
+ }
+ el.resetSourceset_ = () => {
+ el.resetSourceset_ = null;
+ el.load = oldLoad;
+ el.setAttribute = oldSetAttribute;
+ Object.defineProperty(el, 'src', srcDescriptor);
+ if (el.resetSourceWatch_) {
+ el.resetSourceWatch_();
+ }
+ };
+ };
+
+ /**
+ * @file html5.js
+ */
+
+ /**
+ * HTML5 Media Controller - Wrapper for HTML5 Media API
+ *
+ * @mixes Tech~SourceHandlerAdditions
+ * @extends Tech
+ */
+ class Html5 extends Tech {
+ /**
+ * Create an instance of this Tech.
+ *
+ * @param {Object} [options]
+ * The key/value store of player options.
+ *
+ * @param {Function} [ready]
+ * Callback function to call when the `HTML5` Tech is ready.
+ */
+ constructor(options, ready) {
+ super(options, ready);
+ const source = options.source;
+ let crossoriginTracks = false;
+ this.featuresVideoFrameCallback = this.featuresVideoFrameCallback && this.el_.tagName === 'VIDEO';
+
+ // Set the source if one is provided
+ // 1) Check if the source is new (if not, we want to keep the original so playback isn't interrupted)
+ // 2) Check to see if the network state of the tag was failed at init, and if so, reset the source
+ // anyway so the error gets fired.
+ if (source && (this.el_.currentSrc !== source.src || options.tag && options.tag.initNetworkState_ === 3)) {
+ this.setSource(source);
+ } else {
+ this.handleLateInit_(this.el_);
+ }
+
+ // setup sourceset after late sourceset/init
+ if (options.enableSourceset) {
+ this.setupSourcesetHandling_();
+ }
+ this.isScrubbing_ = false;
+ if (this.el_.hasChildNodes()) {
+ const nodes = this.el_.childNodes;
+ let nodesLength = nodes.length;
+ const removeNodes = [];
+ while (nodesLength--) {
+ const node = nodes[nodesLength];
+ const nodeName = node.nodeName.toLowerCase();
+ if (nodeName === 'track') {
+ if (!this.featuresNativeTextTracks) {
+ // Empty video tag tracks so the built-in player doesn't use them also.
+ // This may not be fast enough to stop HTML5 browsers from reading the tags
+ // so we'll need to turn off any default tracks if we're manually doing
+ // captions and subtitles. videoElement.textTracks
+ removeNodes.push(node);
+ } else {
+ // store HTMLTrackElement and TextTrack to remote list
+ this.remoteTextTrackEls().addTrackElement_(node);
+ this.remoteTextTracks().addTrack(node.track);
+ this.textTracks().addTrack(node.track);
+ if (!crossoriginTracks && !this.el_.hasAttribute('crossorigin') && isCrossOrigin(node.src)) {
+ crossoriginTracks = true;
+ }
+ }
+ }
+ }
+ for (let i = 0; i < removeNodes.length; i++) {
+ this.el_.removeChild(removeNodes[i]);
+ }
+ }
+ this.proxyNativeTracks_();
+ if (this.featuresNativeTextTracks && crossoriginTracks) {
+ log$1.warn('Text Tracks are being loaded from another origin but the crossorigin attribute isn\'t used.\n' + 'This may prevent text tracks from loading.');
+ }
+
+ // prevent iOS Safari from disabling metadata text tracks during native playback
+ this.restoreMetadataTracksInIOSNativePlayer_();
+
+ // Determine if native controls should be used
+ // Our goal should be to get the custom controls on mobile solid everywhere
+ // so we can remove this all together. Right now this will block custom
+ // controls on touch enabled laptops like the Chrome Pixel
+ if ((TOUCH_ENABLED || IS_IPHONE) && options.nativeControlsForTouch === true) {
+ this.setControls(true);
+ }
+
+ // on iOS, we want to proxy `webkitbeginfullscreen` and `webkitendfullscreen`
+ // into a `fullscreenchange` event
+ this.proxyWebkitFullscreen_();
+ this.triggerReady();
+ }
+
+ /**
+ * Dispose of `HTML5` media element and remove all tracks.
+ */
+ dispose() {
+ if (this.el_ && this.el_.resetSourceset_) {
+ this.el_.resetSourceset_();
+ }
+ Html5.disposeMediaElement(this.el_);
+ this.options_ = null;
+
+ // tech will handle clearing of the emulated track list
+ super.dispose();
+ }
+
+ /**
+ * Modify the media element so that we can detect when
+ * the source is changed. Fires `sourceset` just after the source has changed
+ */
+ setupSourcesetHandling_() {
+ setupSourceset(this);
+ }
+
+ /**
+ * When a captions track is enabled in the iOS Safari native player, all other
+ * tracks are disabled (including metadata tracks), which nulls all of their
+ * associated cue points. This will restore metadata tracks to their pre-fullscreen
+ * state in those cases so that cue points are not needlessly lost.
+ *
+ * @private
+ */
+ restoreMetadataTracksInIOSNativePlayer_() {
+ const textTracks = this.textTracks();
+ let metadataTracksPreFullscreenState;
+
+ // captures a snapshot of every metadata track's current state
+ const takeMetadataTrackSnapshot = () => {
+ metadataTracksPreFullscreenState = [];
+ for (let i = 0; i < textTracks.length; i++) {
+ const track = textTracks[i];
+ if (track.kind === 'metadata') {
+ metadataTracksPreFullscreenState.push({
+ track,
+ storedMode: track.mode
+ });
+ }
+ }
+ };
+
+ // snapshot each metadata track's initial state, and update the snapshot
+ // each time there is a track 'change' event
+ takeMetadataTrackSnapshot();
+ textTracks.addEventListener('change', takeMetadataTrackSnapshot);
+ this.on('dispose', () => textTracks.removeEventListener('change', takeMetadataTrackSnapshot));
+ const restoreTrackMode = () => {
+ for (let i = 0; i < metadataTracksPreFullscreenState.length; i++) {
+ const storedTrack = metadataTracksPreFullscreenState[i];
+ if (storedTrack.track.mode === 'disabled' && storedTrack.track.mode !== storedTrack.storedMode) {
+ storedTrack.track.mode = storedTrack.storedMode;
+ }
+ }
+ // we only want this handler to be executed on the first 'change' event
+ textTracks.removeEventListener('change', restoreTrackMode);
+ };
+
+ // when we enter fullscreen playback, stop updating the snapshot and
+ // restore all track modes to their pre-fullscreen state
+ this.on('webkitbeginfullscreen', () => {
+ textTracks.removeEventListener('change', takeMetadataTrackSnapshot);
+
+ // remove the listener before adding it just in case it wasn't previously removed
+ textTracks.removeEventListener('change', restoreTrackMode);
+ textTracks.addEventListener('change', restoreTrackMode);
+ });
+
+ // start updating the snapshot again after leaving fullscreen
+ this.on('webkitendfullscreen', () => {
+ // remove the listener before adding it just in case it wasn't previously removed
+ textTracks.removeEventListener('change', takeMetadataTrackSnapshot);
+ textTracks.addEventListener('change', takeMetadataTrackSnapshot);
+
+ // remove the restoreTrackMode handler in case it wasn't triggered during fullscreen playback
+ textTracks.removeEventListener('change', restoreTrackMode);
+ });
+ }
+
+ /**
+ * Attempt to force override of tracks for the given type
+ *
+ * @param {string} type - Track type to override, possible values include 'Audio',
+ * 'Video', and 'Text'.
+ * @param {boolean} override - If set to true native audio/video will be overridden,
+ * otherwise native audio/video will potentially be used.
+ * @private
+ */
+ overrideNative_(type, override) {
+ // If there is no behavioral change don't add/remove listeners
+ if (override !== this[`featuresNative${type}Tracks`]) {
+ return;
+ }
+ const lowerCaseType = type.toLowerCase();
+ if (this[`${lowerCaseType}TracksListeners_`]) {
+ Object.keys(this[`${lowerCaseType}TracksListeners_`]).forEach(eventName => {
+ const elTracks = this.el()[`${lowerCaseType}Tracks`];
+ elTracks.removeEventListener(eventName, this[`${lowerCaseType}TracksListeners_`][eventName]);
+ });
+ }
+ this[`featuresNative${type}Tracks`] = !override;
+ this[`${lowerCaseType}TracksListeners_`] = null;
+ this.proxyNativeTracksForType_(lowerCaseType);
+ }
+
+ /**
+ * Attempt to force override of native audio tracks.
+ *
+ * @param {boolean} override - If set to true native audio will be overridden,
+ * otherwise native audio will potentially be used.
+ */
+ overrideNativeAudioTracks(override) {
+ this.overrideNative_('Audio', override);
+ }
+
+ /**
+ * Attempt to force override of native video tracks.
+ *
+ * @param {boolean} override - If set to true native video will be overridden,
+ * otherwise native video will potentially be used.
+ */
+ overrideNativeVideoTracks(override) {
+ this.overrideNative_('Video', override);
+ }
+
+ /**
+ * Proxy native track list events for the given type to our track
+ * lists if the browser we are playing in supports that type of track list.
+ *
+ * @param {string} name - Track type; values include 'audio', 'video', and 'text'
+ * @private
+ */
+ proxyNativeTracksForType_(name) {
+ const props = NORMAL[name];
+ const elTracks = this.el()[props.getterName];
+ const techTracks = this[props.getterName]();
+ if (!this[`featuresNative${props.capitalName}Tracks`] || !elTracks || !elTracks.addEventListener) {
+ return;
+ }
+ const listeners = {
+ change: e => {
+ const event = {
+ type: 'change',
+ target: techTracks,
+ currentTarget: techTracks,
+ srcElement: techTracks
+ };
+ techTracks.trigger(event);
+
+ // if we are a text track change event, we should also notify the
+ // remote text track list. This can potentially cause a false positive
+ // if we were to get a change event on a non-remote track and
+ // we triggered the event on the remote text track list which doesn't
+ // contain that track. However, best practices mean looping through the
+ // list of tracks and searching for the appropriate mode value, so,
+ // this shouldn't pose an issue
+ if (name === 'text') {
+ this[REMOTE.remoteText.getterName]().trigger(event);
+ }
+ },
+ addtrack(e) {
+ techTracks.addTrack(e.track);
+ },
+ removetrack(e) {
+ techTracks.removeTrack(e.track);
+ }
+ };
+ const removeOldTracks = function () {
+ const removeTracks = [];
+ for (let i = 0; i < techTracks.length; i++) {
+ let found = false;
+ for (let j = 0; j < elTracks.length; j++) {
+ if (elTracks[j] === techTracks[i]) {
+ found = true;
+ break;
+ }
+ }
+ if (!found) {
+ removeTracks.push(techTracks[i]);
+ }
+ }
+ while (removeTracks.length) {
+ techTracks.removeTrack(removeTracks.shift());
+ }
+ };
+ this[props.getterName + 'Listeners_'] = listeners;
+ Object.keys(listeners).forEach(eventName => {
+ const listener = listeners[eventName];
+ elTracks.addEventListener(eventName, listener);
+ this.on('dispose', e => elTracks.removeEventListener(eventName, listener));
+ });
+
+ // Remove (native) tracks that are not used anymore
+ this.on('loadstart', removeOldTracks);
+ this.on('dispose', e => this.off('loadstart', removeOldTracks));
+ }
+
+ /**
+ * Proxy all native track list events to our track lists if the browser we are playing
+ * in supports that type of track list.
+ *
+ * @private
+ */
+ proxyNativeTracks_() {
+ NORMAL.names.forEach(name => {
+ this.proxyNativeTracksForType_(name);
+ });
+ }
+
+ /**
+ * Create the `Html5` Tech's DOM element.
+ *
+ * @return {Element}
+ * The element that gets created.
+ */
+ createEl() {
+ let el = this.options_.tag;
+
+ // Check if this browser supports moving the element into the box.
+ // On the iPhone video will break if you move the element,
+ // So we have to create a brand new element.
+ // If we ingested the player div, we do not need to move the media element.
+ if (!el || !(this.options_.playerElIngest || this.movingMediaElementInDOM)) {
+ // If the original tag is still there, clone and remove it.
+ if (el) {
+ const clone = el.cloneNode(true);
+ if (el.parentNode) {
+ el.parentNode.insertBefore(clone, el);
+ }
+ Html5.disposeMediaElement(el);
+ el = clone;
+ } else {
+ el = document.createElement('video');
+
+ // determine if native controls should be used
+ const tagAttributes = this.options_.tag && getAttributes(this.options_.tag);
+ const attributes = merge$2({}, tagAttributes);
+ if (!TOUCH_ENABLED || this.options_.nativeControlsForTouch !== true) {
+ delete attributes.controls;
+ }
+ setAttributes(el, Object.assign(attributes, {
+ id: this.options_.techId,
+ class: 'vjs-tech'
+ }));
+ }
+ el.playerId = this.options_.playerId;
+ }
+ if (typeof this.options_.preload !== 'undefined') {
+ setAttribute(el, 'preload', this.options_.preload);
+ }
+ if (this.options_.disablePictureInPicture !== undefined) {
+ el.disablePictureInPicture = this.options_.disablePictureInPicture;
+ }
+
+ // Update specific tag settings, in case they were overridden
+ // `autoplay` has to be *last* so that `muted` and `playsinline` are present
+ // when iOS/Safari or other browsers attempt to autoplay.
+ const settingsAttrs = ['loop', 'muted', 'playsinline', 'autoplay'];
+ for (let i = 0; i < settingsAttrs.length; i++) {
+ const attr = settingsAttrs[i];
+ const value = this.options_[attr];
+ if (typeof value !== 'undefined') {
+ if (value) {
+ setAttribute(el, attr, attr);
+ } else {
+ removeAttribute(el, attr);
+ }
+ el[attr] = value;
+ }
+ }
+ return el;
+ }
+
+ /**
+ * This will be triggered if the loadstart event has already fired, before videojs was
+ * ready. Two known examples of when this can happen are:
+ * 1. If we're loading the playback object after it has started loading
+ * 2. The media is already playing the (often with autoplay on) then
+ *
+ * This function will fire another loadstart so that videojs can catchup.
+ *
+ * @fires Tech#loadstart
+ *
+ * @return {undefined}
+ * returns nothing.
+ */
+ handleLateInit_(el) {
+ if (el.networkState === 0 || el.networkState === 3) {
+ // The video element hasn't started loading the source yet
+ // or didn't find a source
+ return;
+ }
+ if (el.readyState === 0) {
+ // NetworkState is set synchronously BUT loadstart is fired at the
+ // end of the current stack, usually before setInterval(fn, 0).
+ // So at this point we know loadstart may have already fired or is
+ // about to fire, and either way the player hasn't seen it yet.
+ // We don't want to fire loadstart prematurely here and cause a
+ // double loadstart so we'll wait and see if it happens between now
+ // and the next loop, and fire it if not.
+ // HOWEVER, we also want to make sure it fires before loadedmetadata
+ // which could also happen between now and the next loop, so we'll
+ // watch for that also.
+ let loadstartFired = false;
+ const setLoadstartFired = function () {
+ loadstartFired = true;
+ };
+ this.on('loadstart', setLoadstartFired);
+ const triggerLoadstart = function () {
+ // We did miss the original loadstart. Make sure the player
+ // sees loadstart before loadedmetadata
+ if (!loadstartFired) {
+ this.trigger('loadstart');
+ }
+ };
+ this.on('loadedmetadata', triggerLoadstart);
+ this.ready(function () {
+ this.off('loadstart', setLoadstartFired);
+ this.off('loadedmetadata', triggerLoadstart);
+ if (!loadstartFired) {
+ // We did miss the original native loadstart. Fire it now.
+ this.trigger('loadstart');
+ }
+ });
+ return;
+ }
+
+ // From here on we know that loadstart already fired and we missed it.
+ // The other readyState events aren't as much of a problem if we double
+ // them, so not going to go to as much trouble as loadstart to prevent
+ // that unless we find reason to.
+ const eventsToTrigger = ['loadstart'];
+
+ // loadedmetadata: newly equal to HAVE_METADATA (1) or greater
+ eventsToTrigger.push('loadedmetadata');
+
+ // loadeddata: newly increased to HAVE_CURRENT_DATA (2) or greater
+ if (el.readyState >= 2) {
+ eventsToTrigger.push('loadeddata');
+ }
+
+ // canplay: newly increased to HAVE_FUTURE_DATA (3) or greater
+ if (el.readyState >= 3) {
+ eventsToTrigger.push('canplay');
+ }
+
+ // canplaythrough: newly equal to HAVE_ENOUGH_DATA (4)
+ if (el.readyState >= 4) {
+ eventsToTrigger.push('canplaythrough');
+ }
+
+ // We still need to give the player time to add event listeners
+ this.ready(function () {
+ eventsToTrigger.forEach(function (type) {
+ this.trigger(type);
+ }, this);
+ });
+ }
+
+ /**
+ * Set whether we are scrubbing or not.
+ * This is used to decide whether we should use `fastSeek` or not.
+ * `fastSeek` is used to provide trick play on Safari browsers.
+ *
+ * @param {boolean} isScrubbing
+ * - true for we are currently scrubbing
+ * - false for we are no longer scrubbing
+ */
+ setScrubbing(isScrubbing) {
+ this.isScrubbing_ = isScrubbing;
+ }
+
+ /**
+ * Get whether we are scrubbing or not.
+ *
+ * @return {boolean} isScrubbing
+ * - true for we are currently scrubbing
+ * - false for we are no longer scrubbing
+ */
+ scrubbing() {
+ return this.isScrubbing_;
+ }
+
+ /**
+ * Set current time for the `HTML5` tech.
+ *
+ * @param {number} seconds
+ * Set the current time of the media to this.
+ */
+ setCurrentTime(seconds) {
+ try {
+ if (this.isScrubbing_ && this.el_.fastSeek && IS_ANY_SAFARI) {
+ this.el_.fastSeek(seconds);
+ } else {
+ this.el_.currentTime = seconds;
+ }
+ } catch (e) {
+ log$1(e, 'Video is not ready. (Video.js)');
+ // this.warning(VideoJS.warnings.videoNotReady);
+ }
+ }
+
+ /**
+ * Get the current duration of the HTML5 media element.
+ *
+ * @return {number}
+ * The duration of the media or 0 if there is no duration.
+ */
+ duration() {
+ // Android Chrome will report duration as Infinity for VOD HLS until after
+ // playback has started, which triggers the live display erroneously.
+ // Return NaN if playback has not started and trigger a durationupdate once
+ // the duration can be reliably known.
+ if (this.el_.duration === Infinity && IS_ANDROID && IS_CHROME && this.el_.currentTime === 0) {
+ // Wait for the first `timeupdate` with currentTime > 0 - there may be
+ // several with 0
+ const checkProgress = () => {
+ if (this.el_.currentTime > 0) {
+ // Trigger durationchange for genuinely live video
+ if (this.el_.duration === Infinity) {
+ this.trigger('durationchange');
+ }
+ this.off('timeupdate', checkProgress);
+ }
+ };
+ this.on('timeupdate', checkProgress);
+ return NaN;
+ }
+ return this.el_.duration || NaN;
+ }
+
+ /**
+ * Get the current width of the HTML5 media element.
+ *
+ * @return {number}
+ * The width of the HTML5 media element.
+ */
+ width() {
+ return this.el_.offsetWidth;
+ }
+
+ /**
+ * Get the current height of the HTML5 media element.
+ *
+ * @return {number}
+ * The height of the HTML5 media element.
+ */
+ height() {
+ return this.el_.offsetHeight;
+ }
+
+ /**
+ * Proxy iOS `webkitbeginfullscreen` and `webkitendfullscreen` into
+ * `fullscreenchange` event.
+ *
+ * @private
+ * @fires fullscreenchange
+ * @listens webkitendfullscreen
+ * @listens webkitbeginfullscreen
+ * @listens webkitbeginfullscreen
+ */
+ proxyWebkitFullscreen_() {
+ if (!('webkitDisplayingFullscreen' in this.el_)) {
+ return;
+ }
+ const endFn = function () {
+ this.trigger('fullscreenchange', {
+ isFullscreen: false
+ });
+ // Safari will sometimes set controls on the videoelement when existing fullscreen.
+ if (this.el_.controls && !this.options_.nativeControlsForTouch && this.controls()) {
+ this.el_.controls = false;
+ }
+ };
+ const beginFn = function () {
+ if ('webkitPresentationMode' in this.el_ && this.el_.webkitPresentationMode !== 'picture-in-picture') {
+ this.one('webkitendfullscreen', endFn);
+ this.trigger('fullscreenchange', {
+ isFullscreen: true,
+ // set a flag in case another tech triggers fullscreenchange
+ nativeIOSFullscreen: true
+ });
+ }
+ };
+ this.on('webkitbeginfullscreen', beginFn);
+ this.on('dispose', () => {
+ this.off('webkitbeginfullscreen', beginFn);
+ this.off('webkitendfullscreen', endFn);
+ });
+ }
+
+ /**
+ * Check if fullscreen is supported on the video el.
+ *
+ * @return {boolean}
+ * - True if fullscreen is supported.
+ * - False if fullscreen is not supported.
+ */
+ supportsFullScreen() {
+ return typeof this.el_.webkitEnterFullScreen === 'function';
+ }
+
+ /**
+ * Request that the `HTML5` Tech enter fullscreen.
+ */
+ enterFullScreen() {
+ const video = this.el_;
+ if (video.paused && video.networkState <= video.HAVE_METADATA) {
+ // attempt to prime the video element for programmatic access
+ // this isn't necessary on the desktop but shouldn't hurt
+ silencePromise(this.el_.play());
+
+ // playing and pausing synchronously during the transition to fullscreen
+ // can get iOS ~6.1 devices into a play/pause loop
+ this.setTimeout(function () {
+ video.pause();
+ try {
+ video.webkitEnterFullScreen();
+ } catch (e) {
+ this.trigger('fullscreenerror', e);
+ }
+ }, 0);
+ } else {
+ try {
+ video.webkitEnterFullScreen();
+ } catch (e) {
+ this.trigger('fullscreenerror', e);
+ }
+ }
+ }
+
+ /**
+ * Request that the `HTML5` Tech exit fullscreen.
+ */
+ exitFullScreen() {
+ if (!this.el_.webkitDisplayingFullscreen) {
+ this.trigger('fullscreenerror', new Error('The video is not fullscreen'));
+ return;
+ }
+ this.el_.webkitExitFullScreen();
+ }
+
+ /**
+ * Create a floating video window always on top of other windows so that users may
+ * continue consuming media while they interact with other content sites, or
+ * applications on their device.
+ *
+ * @see [Spec]{@link https://wicg.github.io/picture-in-picture}
+ *
+ * @return {Promise}
+ * A promise with a Picture-in-Picture window.
+ */
+ requestPictureInPicture() {
+ return this.el_.requestPictureInPicture();
+ }
+
+ /**
+ * Native requestVideoFrameCallback if supported by browser/tech, or fallback
+ * Don't use rVCF on Safari when DRM is playing, as it doesn't fire
+ * Needs to be checked later than the constructor
+ * This will be a false positive for clear sources loaded after a Fairplay source
+ *
+ * @param {function} cb function to call
+ * @return {number} id of request
+ */
+ requestVideoFrameCallback(cb) {
+ if (this.featuresVideoFrameCallback && !this.el_.webkitKeys) {
+ return this.el_.requestVideoFrameCallback(cb);
+ }
+ return super.requestVideoFrameCallback(cb);
+ }
+
+ /**
+ * Native or fallback requestVideoFrameCallback
+ *
+ * @param {number} id request id to cancel
+ */
+ cancelVideoFrameCallback(id) {
+ if (this.featuresVideoFrameCallback && !this.el_.webkitKeys) {
+ this.el_.cancelVideoFrameCallback(id);
+ } else {
+ super.cancelVideoFrameCallback(id);
+ }
+ }
+
+ /**
+ * A getter/setter for the `Html5` Tech's source object.
+ * > Note: Please use {@link Html5#setSource}
+ *
+ * @param {Tech~SourceObject} [src]
+ * The source object you want to set on the `HTML5` techs element.
+ *
+ * @return {Tech~SourceObject|undefined}
+ * - The current source object when a source is not passed in.
+ * - undefined when setting
+ *
+ * @deprecated Since version 5.
+ */
+ src(src) {
+ if (src === undefined) {
+ return this.el_.src;
+ }
+
+ // Setting src through `src` instead of `setSrc` will be deprecated
+ this.setSrc(src);
+ }
+
+ /**
+ * Reset the tech by removing all sources and then calling
+ * {@link Html5.resetMediaElement}.
+ */
+ reset() {
+ Html5.resetMediaElement(this.el_);
+ }
+
+ /**
+ * Get the current source on the `HTML5` Tech. Falls back to returning the source from
+ * the HTML5 media element.
+ *
+ * @return {Tech~SourceObject}
+ * The current source object from the HTML5 tech. With a fallback to the
+ * elements source.
+ */
+ currentSrc() {
+ if (this.currentSource_) {
+ return this.currentSource_.src;
+ }
+ return this.el_.currentSrc;
+ }
+
+ /**
+ * Set controls attribute for the HTML5 media Element.
+ *
+ * @param {string} val
+ * Value to set the controls attribute to
+ */
+ setControls(val) {
+ this.el_.controls = !!val;
+ }
+
+ /**
+ * Create and returns a remote {@link TextTrack} object.
+ *
+ * @param {string} kind
+ * `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata)
+ *
+ * @param {string} [label]
+ * Label to identify the text track
+ *
+ * @param {string} [language]
+ * Two letter language abbreviation
+ *
+ * @return {TextTrack}
+ * The TextTrack that gets created.
+ */
+ addTextTrack(kind, label, language) {
+ if (!this.featuresNativeTextTracks) {
+ return super.addTextTrack(kind, label, language);
+ }
+ return this.el_.addTextTrack(kind, label, language);
+ }
+
+ /**
+ * Creates either native TextTrack or an emulated TextTrack depending
+ * on the value of `featuresNativeTextTracks`
+ *
+ * @param {Object} options
+ * The object should contain the options to initialize the TextTrack with.
+ *
+ * @param {string} [options.kind]
+ * `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata).
+ *
+ * @param {string} [options.label]
+ * Label to identify the text track
+ *
+ * @param {string} [options.language]
+ * Two letter language abbreviation.
+ *
+ * @param {boolean} [options.default]
+ * Default this track to on.
+ *
+ * @param {string} [options.id]
+ * The internal id to assign this track.
+ *
+ * @param {string} [options.src]
+ * A source url for the track.
+ *
+ * @return {HTMLTrackElement}
+ * The track element that gets created.
+ */
+ createRemoteTextTrack(options) {
+ if (!this.featuresNativeTextTracks) {
+ return super.createRemoteTextTrack(options);
+ }
+ const htmlTrackElement = document.createElement('track');
+ if (options.kind) {
+ htmlTrackElement.kind = options.kind;
+ }
+ if (options.label) {
+ htmlTrackElement.label = options.label;
+ }
+ if (options.language || options.srclang) {
+ htmlTrackElement.srclang = options.language || options.srclang;
+ }
+ if (options.default) {
+ htmlTrackElement.default = options.default;
+ }
+ if (options.id) {
+ htmlTrackElement.id = options.id;
+ }
+ if (options.src) {
+ htmlTrackElement.src = options.src;
+ }
+ return htmlTrackElement;
+ }
+
+ /**
+ * Creates a remote text track object and returns an html track element.
+ *
+ * @param {Object} options The object should contain values for
+ * kind, language, label, and src (location of the WebVTT file)
+ * @param {boolean} [manualCleanup=false] if set to true, the TextTrack
+ * will not be removed from the TextTrackList and HtmlTrackElementList
+ * after a source change
+ * @return {HTMLTrackElement} An Html Track Element.
+ * This can be an emulated {@link HTMLTrackElement} or a native one.
+ *
+ */
+ addRemoteTextTrack(options, manualCleanup) {
+ const htmlTrackElement = super.addRemoteTextTrack(options, manualCleanup);
+ if (this.featuresNativeTextTracks) {
+ this.el().appendChild(htmlTrackElement);
+ }
+ return htmlTrackElement;
+ }
+
+ /**
+ * Remove remote `TextTrack` from `TextTrackList` object
+ *
+ * @param {TextTrack} track
+ * `TextTrack` object to remove
+ */
+ removeRemoteTextTrack(track) {
+ super.removeRemoteTextTrack(track);
+ if (this.featuresNativeTextTracks) {
+ const tracks = this.$$('track');
+ let i = tracks.length;
+ while (i--) {
+ if (track === tracks[i] || track === tracks[i].track) {
+ this.el().removeChild(tracks[i]);
+ }
+ }
+ }
+ }
+
+ /**
+ * Gets available media playback quality metrics as specified by the W3C's Media
+ * Playback Quality API.
+ *
+ * @see [Spec]{@link https://wicg.github.io/media-playback-quality}
+ *
+ * @return {Object}
+ * An object with supported media playback quality metrics
+ */
+ getVideoPlaybackQuality() {
+ if (typeof this.el().getVideoPlaybackQuality === 'function') {
+ return this.el().getVideoPlaybackQuality();
+ }
+ const videoPlaybackQuality = {};
+ if (typeof this.el().webkitDroppedFrameCount !== 'undefined' && typeof this.el().webkitDecodedFrameCount !== 'undefined') {
+ videoPlaybackQuality.droppedVideoFrames = this.el().webkitDroppedFrameCount;
+ videoPlaybackQuality.totalVideoFrames = this.el().webkitDecodedFrameCount;
+ }
+ if (window.performance) {
+ videoPlaybackQuality.creationTime = window.performance.now();
+ }
+ return videoPlaybackQuality;
+ }
+ }
+
+ /* HTML5 Support Testing ---------------------------------------------------- */
+
+ /**
+ * Element for testing browser HTML5 media capabilities
+ *
+ * @type {Element}
+ * @constant
+ * @private
+ */
+ defineLazyProperty(Html5, 'TEST_VID', function () {
+ if (!isReal()) {
+ return;
+ }
+ const video = document.createElement('video');
+ const track = document.createElement('track');
+ track.kind = 'captions';
+ track.srclang = 'en';
+ track.label = 'English';
+ video.appendChild(track);
+ return video;
+ });
+
+ /**
+ * Check if HTML5 media is supported by this browser/device.
+ *
+ * @return {boolean}
+ * - True if HTML5 media is supported.
+ * - False if HTML5 media is not supported.
+ */
+ Html5.isSupported = function () {
+ // IE with no Media Player is a LIAR! (#984)
+ try {
+ Html5.TEST_VID.volume = 0.5;
+ } catch (e) {
+ return false;
+ }
+ return !!(Html5.TEST_VID && Html5.TEST_VID.canPlayType);
+ };
+
+ /**
+ * Check if the tech can support the given type
+ *
+ * @param {string} type
+ * The mimetype to check
+ * @return {string} 'probably', 'maybe', or '' (empty string)
+ */
+ Html5.canPlayType = function (type) {
+ return Html5.TEST_VID.canPlayType(type);
+ };
+
+ /**
+ * Check if the tech can support the given source
+ *
+ * @param {Object} srcObj
+ * The source object
+ * @param {Object} options
+ * The options passed to the tech
+ * @return {string} 'probably', 'maybe', or '' (empty string)
+ */
+ Html5.canPlaySource = function (srcObj, options) {
+ return Html5.canPlayType(srcObj.type);
+ };
+
+ /**
+ * Check if the volume can be changed in this browser/device.
+ * Volume cannot be changed in a lot of mobile devices.
+ * Specifically, it can't be changed from 1 on iOS.
+ *
+ * @return {boolean}
+ * - True if volume can be controlled
+ * - False otherwise
+ */
+ Html5.canControlVolume = function () {
+ // IE will error if Windows Media Player not installed #3315
+ try {
+ const volume = Html5.TEST_VID.volume;
+ Html5.TEST_VID.volume = volume / 2 + 0.1;
+ const canControl = volume !== Html5.TEST_VID.volume;
+
+ // With the introduction of iOS 15, there are cases where the volume is read as
+ // changed but reverts back to its original state at the start of the next tick.
+ // To determine whether volume can be controlled on iOS,
+ // a timeout is set and the volume is checked asynchronously.
+ // Since `features` doesn't currently work asynchronously, the value is manually set.
+ if (canControl && IS_IOS) {
+ window.setTimeout(() => {
+ if (Html5 && Html5.prototype) {
+ Html5.prototype.featuresVolumeControl = volume !== Html5.TEST_VID.volume;
+ }
+ });
+
+ // default iOS to false, which will be updated in the timeout above.
+ return false;
+ }
+ return canControl;
+ } catch (e) {
+ return false;
+ }
+ };
+
+ /**
+ * Check if the volume can be muted in this browser/device.
+ * Some devices, e.g. iOS, don't allow changing volume
+ * but permits muting/unmuting.
+ *
+ * @return {boolean}
+ * - True if volume can be muted
+ * - False otherwise
+ */
+ Html5.canMuteVolume = function () {
+ try {
+ const muted = Html5.TEST_VID.muted;
+
+ // in some versions of iOS muted property doesn't always
+ // work, so we want to set both property and attribute
+ Html5.TEST_VID.muted = !muted;
+ if (Html5.TEST_VID.muted) {
+ setAttribute(Html5.TEST_VID, 'muted', 'muted');
+ } else {
+ removeAttribute(Html5.TEST_VID, 'muted', 'muted');
+ }
+ return muted !== Html5.TEST_VID.muted;
+ } catch (e) {
+ return false;
+ }
+ };
+
+ /**
+ * Check if the playback rate can be changed in this browser/device.
+ *
+ * @return {boolean}
+ * - True if playback rate can be controlled
+ * - False otherwise
+ */
+ Html5.canControlPlaybackRate = function () {
+ // Playback rate API is implemented in Android Chrome, but doesn't do anything
+ // https://github.com/videojs/video.js/issues/3180
+ if (IS_ANDROID && IS_CHROME && CHROME_VERSION < 58) {
+ return false;
+ }
+ // IE will error if Windows Media Player not installed #3315
+ try {
+ const playbackRate = Html5.TEST_VID.playbackRate;
+ Html5.TEST_VID.playbackRate = playbackRate / 2 + 0.1;
+ return playbackRate !== Html5.TEST_VID.playbackRate;
+ } catch (e) {
+ return false;
+ }
+ };
+
+ /**
+ * Check if we can override a video/audio elements attributes, with
+ * Object.defineProperty.
+ *
+ * @return {boolean}
+ * - True if builtin attributes can be overridden
+ * - False otherwise
+ */
+ Html5.canOverrideAttributes = function () {
+ // if we cannot overwrite the src/innerHTML property, there is no support
+ // iOS 7 safari for instance cannot do this.
+ try {
+ const noop = () => {};
+ Object.defineProperty(document.createElement('video'), 'src', {
+ get: noop,
+ set: noop
+ });
+ Object.defineProperty(document.createElement('audio'), 'src', {
+ get: noop,
+ set: noop
+ });
+ Object.defineProperty(document.createElement('video'), 'innerHTML', {
+ get: noop,
+ set: noop
+ });
+ Object.defineProperty(document.createElement('audio'), 'innerHTML', {
+ get: noop,
+ set: noop
+ });
+ } catch (e) {
+ return false;
+ }
+ return true;
+ };
+
+ /**
+ * Check to see if native `TextTrack`s are supported by this browser/device.
+ *
+ * @return {boolean}
+ * - True if native `TextTrack`s are supported.
+ * - False otherwise
+ */
+ Html5.supportsNativeTextTracks = function () {
+ return IS_ANY_SAFARI || IS_IOS && IS_CHROME;
+ };
+
+ /**
+ * Check to see if native `VideoTrack`s are supported by this browser/device
+ *
+ * @return {boolean}
+ * - True if native `VideoTrack`s are supported.
+ * - False otherwise
+ */
+ Html5.supportsNativeVideoTracks = function () {
+ return !!(Html5.TEST_VID && Html5.TEST_VID.videoTracks);
+ };
+
+ /**
+ * Check to see if native `AudioTrack`s are supported by this browser/device
+ *
+ * @return {boolean}
+ * - True if native `AudioTrack`s are supported.
+ * - False otherwise
+ */
+ Html5.supportsNativeAudioTracks = function () {
+ return !!(Html5.TEST_VID && Html5.TEST_VID.audioTracks);
+ };
+
+ /**
+ * An array of events available on the Html5 tech.
+ *
+ * @private
+ * @type {Array}
+ */
+ Html5.Events = ['loadstart', 'suspend', 'abort', 'error', 'emptied', 'stalled', 'loadedmetadata', 'loadeddata', 'canplay', 'canplaythrough', 'playing', 'waiting', 'seeking', 'seeked', 'ended', 'durationchange', 'timeupdate', 'progress', 'play', 'pause', 'ratechange', 'resize', 'volumechange'];
+
+ /**
+ * Boolean indicating whether the `Tech` supports volume control.
+ *
+ * @type {boolean}
+ * @default {@link Html5.canControlVolume}
+ */
+ /**
+ * Boolean indicating whether the `Tech` supports muting volume.
+ *
+ * @type {boolean}
+ * @default {@link Html5.canMuteVolume}
+ */
+
+ /**
+ * Boolean indicating whether the `Tech` supports changing the speed at which the media
+ * plays. Examples:
+ * - Set player to play 2x (twice) as fast
+ * - Set player to play 0.5x (half) as fast
+ *
+ * @type {boolean}
+ * @default {@link Html5.canControlPlaybackRate}
+ */
+
+ /**
+ * Boolean indicating whether the `Tech` supports the `sourceset` event.
+ *
+ * @type {boolean}
+ * @default
+ */
+ /**
+ * Boolean indicating whether the `HTML5` tech currently supports native `TextTrack`s.
+ *
+ * @type {boolean}
+ * @default {@link Html5.supportsNativeTextTracks}
+ */
+ /**
+ * Boolean indicating whether the `HTML5` tech currently supports native `VideoTrack`s.
+ *
+ * @type {boolean}
+ * @default {@link Html5.supportsNativeVideoTracks}
+ */
+ /**
+ * Boolean indicating whether the `HTML5` tech currently supports native `AudioTrack`s.
+ *
+ * @type {boolean}
+ * @default {@link Html5.supportsNativeAudioTracks}
+ */
+ [['featuresMuteControl', 'canMuteVolume'], ['featuresPlaybackRate', 'canControlPlaybackRate'], ['featuresSourceset', 'canOverrideAttributes'], ['featuresNativeTextTracks', 'supportsNativeTextTracks'], ['featuresNativeVideoTracks', 'supportsNativeVideoTracks'], ['featuresNativeAudioTracks', 'supportsNativeAudioTracks']].forEach(function ([key, fn]) {
+ defineLazyProperty(Html5.prototype, key, () => Html5[fn](), true);
+ });
+ Html5.prototype.featuresVolumeControl = Html5.canControlVolume();
+
+ /**
+ * Boolean indicating whether the `HTML5` tech currently supports the media element
+ * moving in the DOM. iOS breaks if you move the media element, so this is set this to
+ * false there. Everywhere else this should be true.
+ *
+ * @type {boolean}
+ * @default
+ */
+ Html5.prototype.movingMediaElementInDOM = !IS_IOS;
+
+ // TODO: Previous comment: No longer appears to be used. Can probably be removed.
+ // Is this true?
+ /**
+ * Boolean indicating whether the `HTML5` tech currently supports automatic media resize
+ * when going into fullscreen.
+ *
+ * @type {boolean}
+ * @default
+ */
+ Html5.prototype.featuresFullscreenResize = true;
+
+ /**
+ * Boolean indicating whether the `HTML5` tech currently supports the progress event.
+ * If this is false, manual `progress` events will be triggered instead.
+ *
+ * @type {boolean}
+ * @default
+ */
+ Html5.prototype.featuresProgressEvents = true;
+
+ /**
+ * Boolean indicating whether the `HTML5` tech currently supports the timeupdate event.
+ * If this is false, manual `timeupdate` events will be triggered instead.
+ *
+ * @default
+ */
+ Html5.prototype.featuresTimeupdateEvents = true;
+
+ /**
+ * Whether the HTML5 el supports `requestVideoFrameCallback`
+ *
+ * @type {boolean}
+ */
+ Html5.prototype.featuresVideoFrameCallback = !!(Html5.TEST_VID && Html5.TEST_VID.requestVideoFrameCallback);
+ Html5.disposeMediaElement = function (el) {
+ if (!el) {
+ return;
+ }
+ if (el.parentNode) {
+ el.parentNode.removeChild(el);
+ }
+
+ // remove any child track or source nodes to prevent their loading
+ while (el.hasChildNodes()) {
+ el.removeChild(el.firstChild);
+ }
+
+ // remove any src reference. not setting `src=''` because that causes a warning
+ // in firefox
+ el.removeAttribute('src');
+
+ // force the media element to update its loading state by calling load()
+ // however IE on Windows 7N has a bug that throws an error so need a try/catch (#793)
+ if (typeof el.load === 'function') {
+ // wrapping in an iife so it's not deoptimized (#1060#discussion_r10324473)
+ (function () {
+ try {
+ el.load();
+ } catch (e) {
+ // not supported
+ }
+ })();
+ }
+ };
+ Html5.resetMediaElement = function (el) {
+ if (!el) {
+ return;
+ }
+ const sources = el.querySelectorAll('source');
+ let i = sources.length;
+ while (i--) {
+ el.removeChild(sources[i]);
+ }
+
+ // remove any src reference.
+ // not setting `src=''` because that throws an error
+ el.removeAttribute('src');
+ if (typeof el.load === 'function') {
+ // wrapping in an iife so it's not deoptimized (#1060#discussion_r10324473)
+ (function () {
+ try {
+ el.load();
+ } catch (e) {
+ // satisfy linter
+ }
+ })();
+ }
+ };
+
+ /* Native HTML5 element property wrapping ----------------------------------- */
+ // Wrap native boolean attributes with getters that check both property and attribute
+ // The list is as followed:
+ // muted, defaultMuted, autoplay, controls, loop, playsinline
+ [
+ /**
+ * Get the value of `muted` from the media element. `muted` indicates
+ * that the volume for the media should be set to silent. This does not actually change
+ * the `volume` attribute.
+ *
+ * @method Html5#muted
+ * @return {boolean}
+ * - True if the value of `volume` should be ignored and the audio set to silent.
+ * - False if the value of `volume` should be used.
+ *
+ * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-muted}
+ */
+ 'muted',
+ /**
+ * Get the value of `defaultMuted` from the media element. `defaultMuted` indicates
+ * whether the media should start muted or not. Only changes the default state of the
+ * media. `muted` and `defaultMuted` can have different values. {@link Html5#muted} indicates the
+ * current state.
+ *
+ * @method Html5#defaultMuted
+ * @return {boolean}
+ * - The value of `defaultMuted` from the media element.
+ * - True indicates that the media should start muted.
+ * - False indicates that the media should not start muted
+ *
+ * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-defaultmuted}
+ */
+ 'defaultMuted',
+ /**
+ * Get the value of `autoplay` from the media element. `autoplay` indicates
+ * that the media should start to play as soon as the page is ready.
+ *
+ * @method Html5#autoplay
+ * @return {boolean}
+ * - The value of `autoplay` from the media element.
+ * - True indicates that the media should start as soon as the page loads.
+ * - False indicates that the media should not start as soon as the page loads.
+ *
+ * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-autoplay}
+ */
+ 'autoplay',
+ /**
+ * Get the value of `controls` from the media element. `controls` indicates
+ * whether the native media controls should be shown or hidden.
+ *
+ * @method Html5#controls
+ * @return {boolean}
+ * - The value of `controls` from the media element.
+ * - True indicates that native controls should be showing.
+ * - False indicates that native controls should be hidden.
+ *
+ * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-controls}
+ */
+ 'controls',
+ /**
+ * Get the value of `loop` from the media element. `loop` indicates
+ * that the media should return to the start of the media and continue playing once
+ * it reaches the end.
+ *
+ * @method Html5#loop
+ * @return {boolean}
+ * - The value of `loop` from the media element.
+ * - True indicates that playback should seek back to start once
+ * the end of a media is reached.
+ * - False indicates that playback should not loop back to the start when the
+ * end of the media is reached.
+ *
+ * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-loop}
+ */
+ 'loop',
+ /**
+ * Get the value of `playsinline` from the media element. `playsinline` indicates
+ * to the browser that non-fullscreen playback is preferred when fullscreen
+ * playback is the native default, such as in iOS Safari.
+ *
+ * @method Html5#playsinline
+ * @return {boolean}
+ * - The value of `playsinline` from the media element.
+ * - True indicates that the media should play inline.
+ * - False indicates that the media should not play inline.
+ *
+ * @see [Spec]{@link https://html.spec.whatwg.org/#attr-video-playsinline}
+ */
+ 'playsinline'].forEach(function (prop) {
+ Html5.prototype[prop] = function () {
+ return this.el_[prop] || this.el_.hasAttribute(prop);
+ };
+ });
+
+ // Wrap native boolean attributes with setters that set both property and attribute
+ // The list is as followed:
+ // setMuted, setDefaultMuted, setAutoplay, setLoop, setPlaysinline
+ // setControls is special-cased above
+ [
+ /**
+ * Set the value of `muted` on the media element. `muted` indicates that the current
+ * audio level should be silent.
+ *
+ * @method Html5#setMuted
+ * @param {boolean} muted
+ * - True if the audio should be set to silent
+ * - False otherwise
+ *
+ * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-muted}
+ */
+ 'muted',
+ /**
+ * Set the value of `defaultMuted` on the media element. `defaultMuted` indicates that the current
+ * audio level should be silent, but will only effect the muted level on initial playback..
+ *
+ * @method Html5.prototype.setDefaultMuted
+ * @param {boolean} defaultMuted
+ * - True if the audio should be set to silent
+ * - False otherwise
+ *
+ * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-defaultmuted}
+ */
+ 'defaultMuted',
+ /**
+ * Set the value of `autoplay` on the media element. `autoplay` indicates
+ * that the media should start to play as soon as the page is ready.
+ *
+ * @method Html5#setAutoplay
+ * @param {boolean} autoplay
+ * - True indicates that the media should start as soon as the page loads.
+ * - False indicates that the media should not start as soon as the page loads.
+ *
+ * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-autoplay}
+ */
+ 'autoplay',
+ /**
+ * Set the value of `loop` on the media element. `loop` indicates
+ * that the media should return to the start of the media and continue playing once
+ * it reaches the end.
+ *
+ * @method Html5#setLoop
+ * @param {boolean} loop
+ * - True indicates that playback should seek back to start once
+ * the end of a media is reached.
+ * - False indicates that playback should not loop back to the start when the
+ * end of the media is reached.
+ *
+ * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-loop}
+ */
+ 'loop',
+ /**
+ * Set the value of `playsinline` from the media element. `playsinline` indicates
+ * to the browser that non-fullscreen playback is preferred when fullscreen
+ * playback is the native default, such as in iOS Safari.
+ *
+ * @method Html5#setPlaysinline
+ * @param {boolean} playsinline
+ * - True indicates that the media should play inline.
+ * - False indicates that the media should not play inline.
+ *
+ * @see [Spec]{@link https://html.spec.whatwg.org/#attr-video-playsinline}
+ */
+ 'playsinline'].forEach(function (prop) {
+ Html5.prototype['set' + toTitleCase$1(prop)] = function (v) {
+ this.el_[prop] = v;
+ if (v) {
+ this.el_.setAttribute(prop, prop);
+ } else {
+ this.el_.removeAttribute(prop);
+ }
+ };
+ });
+
+ // Wrap native properties with a getter
+ // The list is as followed
+ // paused, currentTime, buffered, volume, poster, preload, error, seeking
+ // seekable, ended, playbackRate, defaultPlaybackRate, disablePictureInPicture
+ // played, networkState, readyState, videoWidth, videoHeight, crossOrigin
+ [
+ /**
+ * Get the value of `paused` from the media element. `paused` indicates whether the media element
+ * is currently paused or not.
+ *
+ * @method Html5#paused
+ * @return {boolean}
+ * The value of `paused` from the media element.
+ *
+ * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-paused}
+ */
+ 'paused',
+ /**
+ * Get the value of `currentTime` from the media element. `currentTime` indicates
+ * the current second that the media is at in playback.
+ *
+ * @method Html5#currentTime
+ * @return {number}
+ * The value of `currentTime` from the media element.
+ *
+ * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-currenttime}
+ */
+ 'currentTime',
+ /**
+ * Get the value of `buffered` from the media element. `buffered` is a `TimeRange`
+ * object that represents the parts of the media that are already downloaded and
+ * available for playback.
+ *
+ * @method Html5#buffered
+ * @return {TimeRange}
+ * The value of `buffered` from the media element.
+ *
+ * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-buffered}
+ */
+ 'buffered',
+ /**
+ * Get the value of `volume` from the media element. `volume` indicates
+ * the current playback volume of audio for a media. `volume` will be a value from 0
+ * (silent) to 1 (loudest and default).
+ *
+ * @method Html5#volume
+ * @return {number}
+ * The value of `volume` from the media element. Value will be between 0-1.
+ *
+ * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-a-volume}
+ */
+ 'volume',
+ /**
+ * Get the value of `poster` from the media element. `poster` indicates
+ * that the url of an image file that can/will be shown when no media data is available.
+ *
+ * @method Html5#poster
+ * @return {string}
+ * The value of `poster` from the media element. Value will be a url to an
+ * image.
+ *
+ * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-video-poster}
+ */
+ 'poster',
+ /**
+ * Get the value of `preload` from the media element. `preload` indicates
+ * what should download before the media is interacted with. It can have the following
+ * values:
+ * - none: nothing should be downloaded
+ * - metadata: poster and the first few frames of the media may be downloaded to get
+ * media dimensions and other metadata
+ * - auto: allow the media and metadata for the media to be downloaded before
+ * interaction
+ *
+ * @method Html5#preload
+ * @return {string}
+ * The value of `preload` from the media element. Will be 'none', 'metadata',
+ * or 'auto'.
+ *
+ * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-preload}
+ */
+ 'preload',
+ /**
+ * Get the value of the `error` from the media element. `error` indicates any
+ * MediaError that may have occurred during playback. If error returns null there is no
+ * current error.
+ *
+ * @method Html5#error
+ * @return {MediaError|null}
+ * The value of `error` from the media element. Will be `MediaError` if there
+ * is a current error and null otherwise.
+ *
+ * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-error}
+ */
+ 'error',
+ /**
+ * Get the value of `seeking` from the media element. `seeking` indicates whether the
+ * media is currently seeking to a new position or not.
+ *
+ * @method Html5#seeking
+ * @return {boolean}
+ * - The value of `seeking` from the media element.
+ * - True indicates that the media is currently seeking to a new position.
+ * - False indicates that the media is not seeking to a new position at this time.
+ *
+ * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-seeking}
+ */
+ 'seeking',
+ /**
+ * Get the value of `seekable` from the media element. `seekable` returns a
+ * `TimeRange` object indicating ranges of time that can currently be `seeked` to.
+ *
+ * @method Html5#seekable
+ * @return {TimeRange}
+ * The value of `seekable` from the media element. A `TimeRange` object
+ * indicating the current ranges of time that can be seeked to.
+ *
+ * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-seekable}
+ */
+ 'seekable',
+ /**
+ * Get the value of `ended` from the media element. `ended` indicates whether
+ * the media has reached the end or not.
+ *
+ * @method Html5#ended
+ * @return {boolean}
+ * - The value of `ended` from the media element.
+ * - True indicates that the media has ended.
+ * - False indicates that the media has not ended.
+ *
+ * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-ended}
+ */
+ 'ended',
+ /**
+ * Get the value of `playbackRate` from the media element. `playbackRate` indicates
+ * the rate at which the media is currently playing back. Examples:
+ * - if playbackRate is set to 2, media will play twice as fast.
+ * - if playbackRate is set to 0.5, media will play half as fast.
+ *
+ * @method Html5#playbackRate
+ * @return {number}
+ * The value of `playbackRate` from the media element. A number indicating
+ * the current playback speed of the media, where 1 is normal speed.
+ *
+ * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-playbackrate}
+ */
+ 'playbackRate',
+ /**
+ * Get the value of `defaultPlaybackRate` from the media element. `defaultPlaybackRate` indicates
+ * the rate at which the media is currently playing back. This value will not indicate the current
+ * `playbackRate` after playback has started, use {@link Html5#playbackRate} for that.
+ *
+ * Examples:
+ * - if defaultPlaybackRate is set to 2, media will play twice as fast.
+ * - if defaultPlaybackRate is set to 0.5, media will play half as fast.
+ *
+ * @method Html5.prototype.defaultPlaybackRate
+ * @return {number}
+ * The value of `defaultPlaybackRate` from the media element. A number indicating
+ * the current playback speed of the media, where 1 is normal speed.
+ *
+ * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-playbackrate}
+ */
+ 'defaultPlaybackRate',
+ /**
+ * Get the value of 'disablePictureInPicture' from the video element.
+ *
+ * @method Html5#disablePictureInPicture
+ * @return {boolean} value
+ * - The value of `disablePictureInPicture` from the video element.
+ * - True indicates that the video can't be played in Picture-In-Picture mode
+ * - False indicates that the video can be played in Picture-In-Picture mode
+ *
+ * @see [Spec]{@link https://w3c.github.io/picture-in-picture/#disable-pip}
+ */
+ 'disablePictureInPicture',
+ /**
+ * Get the value of `played` from the media element. `played` returns a `TimeRange`
+ * object representing points in the media timeline that have been played.
+ *
+ * @method Html5#played
+ * @return {TimeRange}
+ * The value of `played` from the media element. A `TimeRange` object indicating
+ * the ranges of time that have been played.
+ *
+ * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-played}
+ */
+ 'played',
+ /**
+ * Get the value of `networkState` from the media element. `networkState` indicates
+ * the current network state. It returns an enumeration from the following list:
+ * - 0: NETWORK_EMPTY
+ * - 1: NETWORK_IDLE
+ * - 2: NETWORK_LOADING
+ * - 3: NETWORK_NO_SOURCE
+ *
+ * @method Html5#networkState
+ * @return {number}
+ * The value of `networkState` from the media element. This will be a number
+ * from the list in the description.
+ *
+ * @see [Spec] {@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-networkstate}
+ */
+ 'networkState',
+ /**
+ * Get the value of `readyState` from the media element. `readyState` indicates
+ * the current state of the media element. It returns an enumeration from the
+ * following list:
+ * - 0: HAVE_NOTHING
+ * - 1: HAVE_METADATA
+ * - 2: HAVE_CURRENT_DATA
+ * - 3: HAVE_FUTURE_DATA
+ * - 4: HAVE_ENOUGH_DATA
+ *
+ * @method Html5#readyState
+ * @return {number}
+ * The value of `readyState` from the media element. This will be a number
+ * from the list in the description.
+ *
+ * @see [Spec] {@link https://www.w3.org/TR/html5/embedded-content-0.html#ready-states}
+ */
+ 'readyState',
+ /**
+ * Get the value of `videoWidth` from the video element. `videoWidth` indicates
+ * the current width of the video in css pixels.
+ *
+ * @method Html5#videoWidth
+ * @return {number}
+ * The value of `videoWidth` from the video element. This will be a number
+ * in css pixels.
+ *
+ * @see [Spec] {@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-video-videowidth}
+ */
+ 'videoWidth',
+ /**
+ * Get the value of `videoHeight` from the video element. `videoHeight` indicates
+ * the current height of the video in css pixels.
+ *
+ * @method Html5#videoHeight
+ * @return {number}
+ * The value of `videoHeight` from the video element. This will be a number
+ * in css pixels.
+ *
+ * @see [Spec] {@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-video-videowidth}
+ */
+ 'videoHeight',
+ /**
+ * Get the value of `crossOrigin` from the media element. `crossOrigin` indicates
+ * to the browser that should sent the cookies along with the requests for the
+ * different assets/playlists
+ *
+ * @method Html5#crossOrigin
+ * @return {string}
+ * - anonymous indicates that the media should not sent cookies.
+ * - use-credentials indicates that the media should sent cookies along the requests.
+ *
+ * @see [Spec]{@link https://html.spec.whatwg.org/#attr-media-crossorigin}
+ */
+ 'crossOrigin'].forEach(function (prop) {
+ Html5.prototype[prop] = function () {
+ return this.el_[prop];
+ };
+ });
+
+ // Wrap native properties with a setter in this format:
+ // set + toTitleCase(name)
+ // The list is as follows:
+ // setVolume, setSrc, setPoster, setPreload, setPlaybackRate, setDefaultPlaybackRate,
+ // setDisablePictureInPicture, setCrossOrigin
+ [
+ /**
+ * Set the value of `volume` on the media element. `volume` indicates the current
+ * audio level as a percentage in decimal form. This means that 1 is 100%, 0.5 is 50%, and
+ * so on.
+ *
+ * @method Html5#setVolume
+ * @param {number} percentAsDecimal
+ * The volume percent as a decimal. Valid range is from 0-1.
+ *
+ * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-a-volume}
+ */
+ 'volume',
+ /**
+ * Set the value of `src` on the media element. `src` indicates the current
+ * {@link Tech~SourceObject} for the media.
+ *
+ * @method Html5#setSrc
+ * @param {Tech~SourceObject} src
+ * The source object to set as the current source.
+ *
+ * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-src}
+ */
+ 'src',
+ /**
+ * Set the value of `poster` on the media element. `poster` is the url to
+ * an image file that can/will be shown when no media data is available.
+ *
+ * @method Html5#setPoster
+ * @param {string} poster
+ * The url to an image that should be used as the `poster` for the media
+ * element.
+ *
+ * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-poster}
+ */
+ 'poster',
+ /**
+ * Set the value of `preload` on the media element. `preload` indicates
+ * what should download before the media is interacted with. It can have the following
+ * values:
+ * - none: nothing should be downloaded
+ * - metadata: poster and the first few frames of the media may be downloaded to get
+ * media dimensions and other metadata
+ * - auto: allow the media and metadata for the media to be downloaded before
+ * interaction
+ *
+ * @method Html5#setPreload
+ * @param {string} preload
+ * The value of `preload` to set on the media element. Must be 'none', 'metadata',
+ * or 'auto'.
+ *
+ * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-preload}
+ */
+ 'preload',
+ /**
+ * Set the value of `playbackRate` on the media element. `playbackRate` indicates
+ * the rate at which the media should play back. Examples:
+ * - if playbackRate is set to 2, media will play twice as fast.
+ * - if playbackRate is set to 0.5, media will play half as fast.
+ *
+ * @method Html5#setPlaybackRate
+ * @return {number}
+ * The value of `playbackRate` from the media element. A number indicating
+ * the current playback speed of the media, where 1 is normal speed.
+ *
+ * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-playbackrate}
+ */
+ 'playbackRate',
+ /**
+ * Set the value of `defaultPlaybackRate` on the media element. `defaultPlaybackRate` indicates
+ * the rate at which the media should play back upon initial startup. Changing this value
+ * after a video has started will do nothing. Instead you should used {@link Html5#setPlaybackRate}.
+ *
+ * Example Values:
+ * - if playbackRate is set to 2, media will play twice as fast.
+ * - if playbackRate is set to 0.5, media will play half as fast.
+ *
+ * @method Html5.prototype.setDefaultPlaybackRate
+ * @return {number}
+ * The value of `defaultPlaybackRate` from the media element. A number indicating
+ * the current playback speed of the media, where 1 is normal speed.
+ *
+ * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-defaultplaybackrate}
+ */
+ 'defaultPlaybackRate',
+ /**
+ * Prevents the browser from suggesting a Picture-in-Picture context menu
+ * or to request Picture-in-Picture automatically in some cases.
+ *
+ * @method Html5#setDisablePictureInPicture
+ * @param {boolean} value
+ * The true value will disable Picture-in-Picture mode.
+ *
+ * @see [Spec]{@link https://w3c.github.io/picture-in-picture/#disable-pip}
+ */
+ 'disablePictureInPicture',
+ /**
+ * Set the value of `crossOrigin` from the media element. `crossOrigin` indicates
+ * to the browser that should sent the cookies along with the requests for the
+ * different assets/playlists
+ *
+ * @method Html5#setCrossOrigin
+ * @param {string} crossOrigin
+ * - anonymous indicates that the media should not sent cookies.
+ * - use-credentials indicates that the media should sent cookies along the requests.
+ *
+ * @see [Spec]{@link https://html.spec.whatwg.org/#attr-media-crossorigin}
+ */
+ 'crossOrigin'].forEach(function (prop) {
+ Html5.prototype['set' + toTitleCase$1(prop)] = function (v) {
+ this.el_[prop] = v;
+ };
+ });
+
+ // wrap native functions with a function
+ // The list is as follows:
+ // pause, load, play
+ [
+ /**
+ * A wrapper around the media elements `pause` function. This will call the `HTML5`
+ * media elements `pause` function.
+ *
+ * @method Html5#pause
+ * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-pause}
+ */
+ 'pause',
+ /**
+ * A wrapper around the media elements `load` function. This will call the `HTML5`s
+ * media element `load` function.
+ *
+ * @method Html5#load
+ * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-load}
+ */
+ 'load',
+ /**
+ * A wrapper around the media elements `play` function. This will call the `HTML5`s
+ * media element `play` function.
+ *
+ * @method Html5#play
+ * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-play}
+ */
+ 'play'].forEach(function (prop) {
+ Html5.prototype[prop] = function () {
+ return this.el_[prop]();
+ };
+ });
+ Tech.withSourceHandlers(Html5);
+
+ /**
+ * Native source handler for Html5, simply passes the source to the media element.
+ *
+ * @property {Tech~SourceObject} source
+ * The source object
+ *
+ * @property {Html5} tech
+ * The instance of the HTML5 tech.
+ */
+ Html5.nativeSourceHandler = {};
+
+ /**
+ * Check if the media element can play the given mime type.
+ *
+ * @param {string} type
+ * The mimetype to check
+ *
+ * @return {string}
+ * 'probably', 'maybe', or '' (empty string)
+ */
+ Html5.nativeSourceHandler.canPlayType = function (type) {
+ // IE without MediaPlayer throws an error (#519)
+ try {
+ return Html5.TEST_VID.canPlayType(type);
+ } catch (e) {
+ return '';
+ }
+ };
+
+ /**
+ * Check if the media element can handle a source natively.
+ *
+ * @param {Tech~SourceObject} source
+ * The source object
+ *
+ * @param {Object} [options]
+ * Options to be passed to the tech.
+ *
+ * @return {string}
+ * 'probably', 'maybe', or '' (empty string).
+ */
+ Html5.nativeSourceHandler.canHandleSource = function (source, options) {
+ // If a type was provided we should rely on that
+ if (source.type) {
+ return Html5.nativeSourceHandler.canPlayType(source.type);
+
+ // If no type, fall back to checking 'video/[EXTENSION]'
+ } else if (source.src) {
+ const ext = getFileExtension(source.src);
+ return Html5.nativeSourceHandler.canPlayType(`video/${ext}`);
+ }
+ return '';
+ };
+
+ /**
+ * Pass the source to the native media element.
+ *
+ * @param {Tech~SourceObject} source
+ * The source object
+ *
+ * @param {Html5} tech
+ * The instance of the Html5 tech
+ *
+ * @param {Object} [options]
+ * The options to pass to the source
+ */
+ Html5.nativeSourceHandler.handleSource = function (source, tech, options) {
+ tech.setSrc(source.src);
+ };
+
+ /**
+ * A noop for the native dispose function, as cleanup is not needed.
+ */
+ Html5.nativeSourceHandler.dispose = function () {};
+
+ // Register the native source handler
+ Html5.registerSourceHandler(Html5.nativeSourceHandler);
+ Tech.registerTech('Html5', Html5);
+
+ /**
+ * @file player.js
+ */
+
+ // The following tech events are simply re-triggered
+ // on the player when they happen
+ const TECH_EVENTS_RETRIGGER = [
+ /**
+ * Fired while the user agent is downloading media data.
+ *
+ * @event Player#progress
+ * @type {Event}
+ */
+ /**
+ * Retrigger the `progress` event that was triggered by the {@link Tech}.
+ *
+ * @private
+ * @method Player#handleTechProgress_
+ * @fires Player#progress
+ * @listens Tech#progress
+ */
+ 'progress',
+ /**
+ * Fires when the loading of an audio/video is aborted.
+ *
+ * @event Player#abort
+ * @type {Event}
+ */
+ /**
+ * Retrigger the `abort` event that was triggered by the {@link Tech}.
+ *
+ * @private
+ * @method Player#handleTechAbort_
+ * @fires Player#abort
+ * @listens Tech#abort
+ */
+ 'abort',
+ /**
+ * Fires when the browser is intentionally not getting media data.
+ *
+ * @event Player#suspend
+ * @type {Event}
+ */
+ /**
+ * Retrigger the `suspend` event that was triggered by the {@link Tech}.
+ *
+ * @private
+ * @method Player#handleTechSuspend_
+ * @fires Player#suspend
+ * @listens Tech#suspend
+ */
+ 'suspend',
+ /**
+ * Fires when the current playlist is empty.
+ *
+ * @event Player#emptied
+ * @type {Event}
+ */
+ /**
+ * Retrigger the `emptied` event that was triggered by the {@link Tech}.
+ *
+ * @private
+ * @method Player#handleTechEmptied_
+ * @fires Player#emptied
+ * @listens Tech#emptied
+ */
+ 'emptied',
+ /**
+ * Fires when the browser is trying to get media data, but data is not available.
+ *
+ * @event Player#stalled
+ * @type {Event}
+ */
+ /**
+ * Retrigger the `stalled` event that was triggered by the {@link Tech}.
+ *
+ * @private
+ * @method Player#handleTechStalled_
+ * @fires Player#stalled
+ * @listens Tech#stalled
+ */
+ 'stalled',
+ /**
+ * Fires when the browser has loaded meta data for the audio/video.
+ *
+ * @event Player#loadedmetadata
+ * @type {Event}
+ */
+ /**
+ * Retrigger the `loadedmetadata` event that was triggered by the {@link Tech}.
+ *
+ * @private
+ * @method Player#handleTechLoadedmetadata_
+ * @fires Player#loadedmetadata
+ * @listens Tech#loadedmetadata
+ */
+ 'loadedmetadata',
+ /**
+ * Fires when the browser has loaded the current frame of the audio/video.
+ *
+ * @event Player#loadeddata
+ * @type {event}
+ */
+ /**
+ * Retrigger the `loadeddata` event that was triggered by the {@link Tech}.
+ *
+ * @private
+ * @method Player#handleTechLoaddeddata_
+ * @fires Player#loadeddata
+ * @listens Tech#loadeddata
+ */
+ 'loadeddata',
+ /**
+ * Fires when the current playback position has changed.
+ *
+ * @event Player#timeupdate
+ * @type {event}
+ */
+ /**
+ * Retrigger the `timeupdate` event that was triggered by the {@link Tech}.
+ *
+ * @private
+ * @method Player#handleTechTimeUpdate_
+ * @fires Player#timeupdate
+ * @listens Tech#timeupdate
+ */
+ 'timeupdate',
+ /**
+ * Fires when the video's intrinsic dimensions change
+ *
+ * @event Player#resize
+ * @type {event}
+ */
+ /**
+ * Retrigger the `resize` event that was triggered by the {@link Tech}.
+ *
+ * @private
+ * @method Player#handleTechResize_
+ * @fires Player#resize
+ * @listens Tech#resize
+ */
+ 'resize',
+ /**
+ * Fires when the volume has been changed
+ *
+ * @event Player#volumechange
+ * @type {event}
+ */
+ /**
+ * Retrigger the `volumechange` event that was triggered by the {@link Tech}.
+ *
+ * @private
+ * @method Player#handleTechVolumechange_
+ * @fires Player#volumechange
+ * @listens Tech#volumechange
+ */
+ 'volumechange',
+ /**
+ * Fires when the text track has been changed
+ *
+ * @event Player#texttrackchange
+ * @type {event}
+ */
+ /**
+ * Retrigger the `texttrackchange` event that was triggered by the {@link Tech}.
+ *
+ * @private
+ * @method Player#handleTechTexttrackchange_
+ * @fires Player#texttrackchange
+ * @listens Tech#texttrackchange
+ */
+ 'texttrackchange'];
+
+ // events to queue when playback rate is zero
+ // this is a hash for the sole purpose of mapping non-camel-cased event names
+ // to camel-cased function names
+ const TECH_EVENTS_QUEUE = {
+ canplay: 'CanPlay',
+ canplaythrough: 'CanPlayThrough',
+ playing: 'Playing',
+ seeked: 'Seeked'
+ };
+ const BREAKPOINT_ORDER = ['tiny', 'xsmall', 'small', 'medium', 'large', 'xlarge', 'huge'];
+ const BREAKPOINT_CLASSES = {};
+
+ // grep: vjs-layout-tiny
+ // grep: vjs-layout-x-small
+ // grep: vjs-layout-small
+ // grep: vjs-layout-medium
+ // grep: vjs-layout-large
+ // grep: vjs-layout-x-large
+ // grep: vjs-layout-huge
+ BREAKPOINT_ORDER.forEach(k => {
+ const v = k.charAt(0) === 'x' ? `x-${k.substring(1)}` : k;
+ BREAKPOINT_CLASSES[k] = `vjs-layout-${v}`;
+ });
+ const DEFAULT_BREAKPOINTS = {
+ tiny: 210,
+ xsmall: 320,
+ small: 425,
+ medium: 768,
+ large: 1440,
+ xlarge: 2560,
+ huge: Infinity
+ };
+
+ /**
+ * An instance of the `Player` class is created when any of the Video.js setup methods
+ * are used to initialize a video.
+ *
+ * After an instance has been created it can be accessed globally in three ways:
+ * 1. By calling `videojs.getPlayer('example_video_1');`
+ * 2. By calling `videojs('example_video_1');` (not recommended)
+ * 2. By using it directly via `videojs.players.example_video_1;`
+ *
+ * @extends Component
+ * @global
+ */
+ class Player extends Component$1 {
+ /**
+ * Create an instance of this class.
+ *
+ * @param {Element} tag
+ * The original video DOM element used for configuring options.
+ *
+ * @param {Object} [options]
+ * Object of option names and values.
+ *
+ * @param {Function} [ready]
+ * Ready callback function.
+ */
+ constructor(tag, options, ready) {
+ // Make sure tag ID exists
+ // also here.. probably better
+ tag.id = tag.id || options.id || `vjs_video_${newGUID()}`;
+
+ // Set Options
+ // The options argument overrides options set in the video tag
+ // which overrides globally set options.
+ // This latter part coincides with the load order
+ // (tag must exist before Player)
+ options = Object.assign(Player.getTagSettings(tag), options);
+
+ // Delay the initialization of children because we need to set up
+ // player properties first, and can't use `this` before `super()`
+ options.initChildren = false;
+
+ // Same with creating the element
+ options.createEl = false;
+
+ // don't auto mixin the evented mixin
+ options.evented = false;
+
+ // we don't want the player to report touch activity on itself
+ // see enableTouchActivity in Component
+ options.reportTouchActivity = false;
+
+ // If language is not set, get the closest lang attribute
+ if (!options.language) {
+ const closest = tag.closest('[lang]');
+ if (closest) {
+ options.language = closest.getAttribute('lang');
+ }
+ }
+
+ // Run base component initializing with new options
+ super(null, options, ready);
+
+ // Create bound methods for document listeners.
+ this.boundDocumentFullscreenChange_ = e => this.documentFullscreenChange_(e);
+ this.boundFullWindowOnEscKey_ = e => this.fullWindowOnEscKey(e);
+ this.boundUpdateStyleEl_ = e => this.updateStyleEl_(e);
+ this.boundApplyInitTime_ = e => this.applyInitTime_(e);
+ this.boundUpdateCurrentBreakpoint_ = e => this.updateCurrentBreakpoint_(e);
+ this.boundHandleTechClick_ = e => this.handleTechClick_(e);
+ this.boundHandleTechDoubleClick_ = e => this.handleTechDoubleClick_(e);
+ this.boundHandleTechTouchStart_ = e => this.handleTechTouchStart_(e);
+ this.boundHandleTechTouchMove_ = e => this.handleTechTouchMove_(e);
+ this.boundHandleTechTouchEnd_ = e => this.handleTechTouchEnd_(e);
+ this.boundHandleTechTap_ = e => this.handleTechTap_(e);
+
+ // default isFullscreen_ to false
+ this.isFullscreen_ = false;
+
+ // create logger
+ this.log = createLogger(this.id_);
+
+ // Hold our own reference to fullscreen api so it can be mocked in tests
+ this.fsApi_ = FullscreenApi;
+
+ // Tracks when a tech changes the poster
+ this.isPosterFromTech_ = false;
+
+ // Holds callback info that gets queued when playback rate is zero
+ // and a seek is happening
+ this.queuedCallbacks_ = [];
+
+ // Turn off API access because we're loading a new tech that might load asynchronously
+ this.isReady_ = false;
+
+ // Init state hasStarted_
+ this.hasStarted_ = false;
+
+ // Init state userActive_
+ this.userActive_ = false;
+
+ // Init debugEnabled_
+ this.debugEnabled_ = false;
+
+ // Init state audioOnlyMode_
+ this.audioOnlyMode_ = false;
+
+ // Init state audioPosterMode_
+ this.audioPosterMode_ = false;
+
+ // Init state audioOnlyCache_
+ this.audioOnlyCache_ = {
+ playerHeight: null,
+ hiddenChildren: []
+ };
+
+ // if the global option object was accidentally blown away by
+ // someone, bail early with an informative error
+ if (!this.options_ || !this.options_.techOrder || !this.options_.techOrder.length) {
+ throw new Error('No techOrder specified. Did you overwrite ' + 'videojs.options instead of just changing the ' + 'properties you want to override?');
+ }
+
+ // Store the original tag used to set options
+ this.tag = tag;
+
+ // Store the tag attributes used to restore html5 element
+ this.tagAttributes = tag && getAttributes(tag);
+
+ // Update current language
+ this.language(this.options_.language);
+
+ // Update Supported Languages
+ if (options.languages) {
+ // Normalise player option languages to lowercase
+ const languagesToLower = {};
+ Object.getOwnPropertyNames(options.languages).forEach(function (name) {
+ languagesToLower[name.toLowerCase()] = options.languages[name];
+ });
+ this.languages_ = languagesToLower;
+ } else {
+ this.languages_ = Player.prototype.options_.languages;
+ }
+ this.resetCache_();
+
+ // Set poster
+ /** @type string */
+ this.poster_ = options.poster || '';
+
+ // Set controls
+ /** @type {boolean} */
+ this.controls_ = !!options.controls;
+
+ // Original tag settings stored in options
+ // now remove immediately so native controls don't flash.
+ // May be turned back on by HTML5 tech if nativeControlsForTouch is true
+ tag.controls = false;
+ tag.removeAttribute('controls');
+ this.changingSrc_ = false;
+ this.playCallbacks_ = [];
+ this.playTerminatedQueue_ = [];
+
+ // the attribute overrides the option
+ if (tag.hasAttribute('autoplay')) {
+ this.autoplay(true);
+ } else {
+ // otherwise use the setter to validate and
+ // set the correct value.
+ this.autoplay(this.options_.autoplay);
+ }
+
+ // check plugins
+ if (options.plugins) {
+ Object.keys(options.plugins).forEach(name => {
+ if (typeof this[name] !== 'function') {
+ throw new Error(`plugin "${name}" does not exist`);
+ }
+ });
+ }
+
+ /*
+ * Store the internal state of scrubbing
+ *
+ * @private
+ * @return {Boolean} True if the user is scrubbing
+ */
+ this.scrubbing_ = false;
+ this.el_ = this.createEl();
+
+ // Make this an evented object and use `el_` as its event bus.
+ evented(this, {
+ eventBusKey: 'el_'
+ });
+
+ // listen to document and player fullscreenchange handlers so we receive those events
+ // before a user can receive them so we can update isFullscreen appropriately.
+ // make sure that we listen to fullscreenchange events before everything else to make sure that
+ // our isFullscreen method is updated properly for internal components as well as external.
+ if (this.fsApi_.requestFullscreen) {
+ on(document, this.fsApi_.fullscreenchange, this.boundDocumentFullscreenChange_);
+ this.on(this.fsApi_.fullscreenchange, this.boundDocumentFullscreenChange_);
+ }
+ if (this.fluid_) {
+ this.on(['playerreset', 'resize'], this.boundUpdateStyleEl_);
+ }
+ // We also want to pass the original player options to each component and plugin
+ // as well so they don't need to reach back into the player for options later.
+ // We also need to do another copy of this.options_ so we don't end up with
+ // an infinite loop.
+ const playerOptionsCopy = merge$2(this.options_);
+
+ // Load plugins
+ if (options.plugins) {
+ Object.keys(options.plugins).forEach(name => {
+ this[name](options.plugins[name]);
+ });
+ }
+
+ // Enable debug mode to fire debugon event for all plugins.
+ if (options.debug) {
+ this.debug(true);
+ }
+ this.options_.playerOptions = playerOptionsCopy;
+ this.middleware_ = [];
+ this.playbackRates(options.playbackRates);
+ if (options.experimentalSvgIcons) {
+ // Add SVG Sprite to the DOM
+ const parser = new window.DOMParser();
+ const parsedSVG = parser.parseFromString(icons, 'image/svg+xml');
+ const errorNode = parsedSVG.querySelector('parsererror');
+ if (errorNode) {
+ log$1.warn('Failed to load SVG Icons. Falling back to Font Icons.');
+ this.options_.experimentalSvgIcons = null;
+ } else {
+ const sprite = parsedSVG.documentElement;
+ sprite.style.display = 'none';
+ this.el_.appendChild(sprite);
+ this.addClass('vjs-svg-icons-enabled');
+ }
+ }
+ this.initChildren();
+
+ // Set isAudio based on whether or not an audio tag was used
+ this.isAudio(tag.nodeName.toLowerCase() === 'audio');
+
+ // Update controls className. Can't do this when the controls are initially
+ // set because the element doesn't exist yet.
+ if (this.controls()) {
+ this.addClass('vjs-controls-enabled');
+ } else {
+ this.addClass('vjs-controls-disabled');
+ }
+
+ // Set ARIA label and region role depending on player type
+ this.el_.setAttribute('role', 'region');
+ if (this.isAudio()) {
+ this.el_.setAttribute('aria-label', this.localize('Audio Player'));
+ } else {
+ this.el_.setAttribute('aria-label', this.localize('Video Player'));
+ }
+ if (this.isAudio()) {
+ this.addClass('vjs-audio');
+ }
+
+ // TODO: Make this smarter. Toggle user state between touching/mousing
+ // using events, since devices can have both touch and mouse events.
+ // TODO: Make this check be performed again when the window switches between monitors
+ // (See https://github.com/videojs/video.js/issues/5683)
+ if (TOUCH_ENABLED) {
+ this.addClass('vjs-touch-enabled');
+ }
+
+ // iOS Safari has broken hover handling
+ if (!IS_IOS) {
+ this.addClass('vjs-workinghover');
+ }
+
+ // Make player easily findable by ID
+ Player.players[this.id_] = this;
+
+ // Add a major version class to aid css in plugins
+ const majorVersion = version$5.split('.')[0];
+ this.addClass(`vjs-v${majorVersion}`);
+
+ // When the player is first initialized, trigger activity so components
+ // like the control bar show themselves if needed
+ this.userActive(true);
+ this.reportUserActivity();
+ this.one('play', e => this.listenForUserActivity_(e));
+ this.on('keydown', e => this.handleKeyDown(e));
+ this.on('languagechange', e => this.handleLanguagechange(e));
+ this.breakpoints(this.options_.breakpoints);
+ this.responsive(this.options_.responsive);
+
+ // Calling both the audio mode methods after the player is fully
+ // setup to be able to listen to the events triggered by them
+ this.on('ready', () => {
+ // Calling the audioPosterMode method first so that
+ // the audioOnlyMode can take precedence when both options are set to true
+ this.audioPosterMode(this.options_.audioPosterMode);
+ this.audioOnlyMode(this.options_.audioOnlyMode);
+ });
+ }
+
+ /**
+ * Destroys the video player and does any necessary cleanup.
+ *
+ * This is especially helpful if you are dynamically adding and removing videos
+ * to/from the DOM.
+ *
+ * @fires Player#dispose
+ */
+ dispose() {
+ /**
+ * Called when the player is being disposed of.
+ *
+ * @event Player#dispose
+ * @type {Event}
+ */
+ this.trigger('dispose');
+ // prevent dispose from being called twice
+ this.off('dispose');
+
+ // Make sure all player-specific document listeners are unbound. This is
+ off(document, this.fsApi_.fullscreenchange, this.boundDocumentFullscreenChange_);
+ off(document, 'keydown', this.boundFullWindowOnEscKey_);
+ if (this.styleEl_ && this.styleEl_.parentNode) {
+ this.styleEl_.parentNode.removeChild(this.styleEl_);
+ this.styleEl_ = null;
+ }
+
+ // Kill reference to this player
+ Player.players[this.id_] = null;
+ if (this.tag && this.tag.player) {
+ this.tag.player = null;
+ }
+ if (this.el_ && this.el_.player) {
+ this.el_.player = null;
+ }
+ if (this.tech_) {
+ this.tech_.dispose();
+ this.isPosterFromTech_ = false;
+ this.poster_ = '';
+ }
+ if (this.playerElIngest_) {
+ this.playerElIngest_ = null;
+ }
+ if (this.tag) {
+ this.tag = null;
+ }
+ clearCacheForPlayer(this);
+
+ // remove all event handlers for track lists
+ // all tracks and track listeners are removed on
+ // tech dispose
+ ALL.names.forEach(name => {
+ const props = ALL[name];
+ const list = this[props.getterName]();
+
+ // if it is not a native list
+ // we have to manually remove event listeners
+ if (list && list.off) {
+ list.off();
+ }
+ });
+
+ // the actual .el_ is removed here, or replaced if
+ super.dispose({
+ restoreEl: this.options_.restoreEl
+ });
+ }
+
+ /**
+ * Create the `Player`'s DOM element.
+ *
+ * @return {Element}
+ * The DOM element that gets created.
+ */
+ createEl() {
+ let tag = this.tag;
+ let el;
+ let playerElIngest = this.playerElIngest_ = tag.parentNode && tag.parentNode.hasAttribute && tag.parentNode.hasAttribute('data-vjs-player');
+ const divEmbed = this.tag.tagName.toLowerCase() === 'video-js';
+ if (playerElIngest) {
+ el = this.el_ = tag.parentNode;
+ } else if (!divEmbed) {
+ el = this.el_ = super.createEl('div');
+ }
+
+ // Copy over all the attributes from the tag, including ID and class
+ // ID will now reference player box, not the video tag
+ const attrs = getAttributes(tag);
+ if (divEmbed) {
+ el = this.el_ = tag;
+ tag = this.tag = document.createElement('video');
+ while (el.children.length) {
+ tag.appendChild(el.firstChild);
+ }
+ if (!hasClass(el, 'video-js')) {
+ addClass(el, 'video-js');
+ }
+ el.appendChild(tag);
+ playerElIngest = this.playerElIngest_ = el;
+ // move properties over from our custom `video-js` element
+ // to our new `video` element. This will move things like
+ // `src` or `controls` that were set via js before the player
+ // was initialized.
+ Object.keys(el).forEach(k => {
+ try {
+ tag[k] = el[k];
+ } catch (e) {
+ // we got a a property like outerHTML which we can't actually copy, ignore it
+ }
+ });
+ }
+
+ // set tabindex to -1 to remove the video element from the focus order
+ tag.setAttribute('tabindex', '-1');
+ attrs.tabindex = '-1';
+
+ // Workaround for #4583 on Chrome (on Windows) with JAWS.
+ // See https://github.com/FreedomScientific/VFO-standards-support/issues/78
+ // Note that we can't detect if JAWS is being used, but this ARIA attribute
+ // doesn't change behavior of Chrome if JAWS is not being used
+ if (IS_CHROME && IS_WINDOWS) {
+ tag.setAttribute('role', 'application');
+ attrs.role = 'application';
+ }
+
+ // Remove width/height attrs from tag so CSS can make it 100% width/height
+ tag.removeAttribute('width');
+ tag.removeAttribute('height');
+ if ('width' in attrs) {
+ delete attrs.width;
+ }
+ if ('height' in attrs) {
+ delete attrs.height;
+ }
+ Object.getOwnPropertyNames(attrs).forEach(function (attr) {
+ // don't copy over the class attribute to the player element when we're in a div embed
+ // the class is already set up properly in the divEmbed case
+ // and we want to make sure that the `video-js` class doesn't get lost
+ if (!(divEmbed && attr === 'class')) {
+ el.setAttribute(attr, attrs[attr]);
+ }
+ if (divEmbed) {
+ tag.setAttribute(attr, attrs[attr]);
+ }
+ });
+
+ // Update tag id/class for use as HTML5 playback tech
+ // Might think we should do this after embedding in container so .vjs-tech class
+ // doesn't flash 100% width/height, but class only applies with .video-js parent
+ tag.playerId = tag.id;
+ tag.id += '_html5_api';
+ tag.className = 'vjs-tech';
+
+ // Make player findable on elements
+ tag.player = el.player = this;
+ // Default state of video is paused
+ this.addClass('vjs-paused');
+ const deviceClassNames = ['IS_SMART_TV', 'IS_TIZEN', 'IS_WEBOS', 'IS_ANDROID', 'IS_IPAD', 'IS_IPHONE'].filter(key => browser[key]).map(key => {
+ return 'vjs-device-' + key.substring(3).toLowerCase().replace(/\_/g, '-');
+ });
+ this.addClass(...deviceClassNames);
+
+ // Add a style element in the player that we'll use to set the width/height
+ // of the player in a way that's still overridable by CSS, just like the
+ // video element
+ if (window.VIDEOJS_NO_DYNAMIC_STYLE !== true) {
+ this.styleEl_ = createStyleElement('vjs-styles-dimensions');
+ const defaultsStyleEl = $('.vjs-styles-defaults');
+ const head = $('head');
+ head.insertBefore(this.styleEl_, defaultsStyleEl ? defaultsStyleEl.nextSibling : head.firstChild);
+ }
+ this.fill_ = false;
+ this.fluid_ = false;
+
+ // Pass in the width/height/aspectRatio options which will update the style el
+ this.width(this.options_.width);
+ this.height(this.options_.height);
+ this.fill(this.options_.fill);
+ this.fluid(this.options_.fluid);
+ this.aspectRatio(this.options_.aspectRatio);
+ // support both crossOrigin and crossorigin to reduce confusion and issues around the name
+ this.crossOrigin(this.options_.crossOrigin || this.options_.crossorigin);
+
+ // Hide any links within the video/audio tag,
+ // because IE doesn't hide them completely from screen readers.
+ const links = tag.getElementsByTagName('a');
+ for (let i = 0; i < links.length; i++) {
+ const linkEl = links.item(i);
+ addClass(linkEl, 'vjs-hidden');
+ linkEl.setAttribute('hidden', 'hidden');
+ }
+
+ // insertElFirst seems to cause the networkState to flicker from 3 to 2, so
+ // keep track of the original for later so we can know if the source originally failed
+ tag.initNetworkState_ = tag.networkState;
+
+ // Wrap video tag in div (el/box) container
+ if (tag.parentNode && !playerElIngest) {
+ tag.parentNode.insertBefore(el, tag);
+ }
+
+ // insert the tag as the first child of the player element
+ // then manually add it to the children array so that this.addChild
+ // will work properly for other components
+ //
+ // Breaks iPhone, fixed in HTML5 setup.
+ prependTo(tag, el);
+ this.children_.unshift(tag);
+
+ // Set lang attr on player to ensure CSS :lang() in consistent with player
+ // if it's been set to something different to the doc
+ this.el_.setAttribute('lang', this.language_);
+ this.el_.setAttribute('translate', 'no');
+ this.el_ = el;
+ return el;
+ }
+
+ /**
+ * Get or set the `Player`'s crossOrigin option. For the HTML5 player, this
+ * sets the `crossOrigin` property on the `<video>` tag to control the CORS
+ * behavior.
+ *
+ * @see [Video Element Attributes]{@link https://developer.mozilla.org/en-US/docs/Web/HTML/Element/video#attr-crossorigin}
+ *
+ * @param {string|null} [value]
+ * The value to set the `Player`'s crossOrigin to. If an argument is
+ * given, must be one of `'anonymous'` or `'use-credentials'`, or 'null'.
+ *
+ * @return {string|null|undefined}
+ * - The current crossOrigin value of the `Player` when getting.
+ * - undefined when setting
+ */
+ crossOrigin(value) {
+ // `null` can be set to unset a value
+ if (typeof value === 'undefined') {
+ return this.techGet_('crossOrigin');
+ }
+ if (value !== null && value !== 'anonymous' && value !== 'use-credentials') {
+ log$1.warn(`crossOrigin must be null, "anonymous" or "use-credentials", given "${value}"`);
+ return;
+ }
+ this.techCall_('setCrossOrigin', value);
+ if (this.posterImage) {
+ this.posterImage.crossOrigin(value);
+ }
+ return;
+ }
+
+ /**
+ * A getter/setter for the `Player`'s width. Returns the player's configured value.
+ * To get the current width use `currentWidth()`.
+ *
+ * @param {number|string} [value]
+ * CSS value to set the `Player`'s width to.
+ *
+ * @return {number|undefined}
+ * - The current width of the `Player` when getting.
+ * - Nothing when setting
+ */
+ width(value) {
+ return this.dimension('width', value);
+ }
+
+ /**
+ * A getter/setter for the `Player`'s height. Returns the player's configured value.
+ * To get the current height use `currentheight()`.
+ *
+ * @param {number|string} [value]
+ * CSS value to set the `Player`'s height to.
+ *
+ * @return {number|undefined}
+ * - The current height of the `Player` when getting.
+ * - Nothing when setting
+ */
+ height(value) {
+ return this.dimension('height', value);
+ }
+
+ /**
+ * A getter/setter for the `Player`'s width & height.
+ *
+ * @param {string} dimension
+ * This string can be:
+ * - 'width'
+ * - 'height'
+ *
+ * @param {number|string} [value]
+ * Value for dimension specified in the first argument.
+ *
+ * @return {number}
+ * The dimension arguments value when getting (width/height).
+ */
+ dimension(dimension, value) {
+ const privDimension = dimension + '_';
+ if (value === undefined) {
+ return this[privDimension] || 0;
+ }
+ if (value === '' || value === 'auto') {
+ // If an empty string is given, reset the dimension to be automatic
+ this[privDimension] = undefined;
+ this.updateStyleEl_();
+ return;
+ }
+ const parsedVal = parseFloat(value);
+ if (isNaN(parsedVal)) {
+ log$1.error(`Improper value "${value}" supplied for for ${dimension}`);
+ return;
+ }
+ this[privDimension] = parsedVal;
+ this.updateStyleEl_();
+ }
+
+ /**
+ * A getter/setter/toggler for the vjs-fluid `className` on the `Player`.
+ *
+ * Turning this on will turn off fill mode.
+ *
+ * @param {boolean} [bool]
+ * - A value of true adds the class.
+ * - A value of false removes the class.
+ * - No value will be a getter.
+ *
+ * @return {boolean|undefined}
+ * - The value of fluid when getting.
+ * - `undefined` when setting.
+ */
+ fluid(bool) {
+ if (bool === undefined) {
+ return !!this.fluid_;
+ }
+ this.fluid_ = !!bool;
+ if (isEvented(this)) {
+ this.off(['playerreset', 'resize'], this.boundUpdateStyleEl_);
+ }
+ if (bool) {
+ this.addClass('vjs-fluid');
+ this.fill(false);
+ addEventedCallback(this, () => {
+ this.on(['playerreset', 'resize'], this.boundUpdateStyleEl_);
+ });
+ } else {
+ this.removeClass('vjs-fluid');
+ }
+ this.updateStyleEl_();
+ }
+
+ /**
+ * A getter/setter/toggler for the vjs-fill `className` on the `Player`.
+ *
+ * Turning this on will turn off fluid mode.
+ *
+ * @param {boolean} [bool]
+ * - A value of true adds the class.
+ * - A value of false removes the class.
+ * - No value will be a getter.
+ *
+ * @return {boolean|undefined}
+ * - The value of fluid when getting.
+ * - `undefined` when setting.
+ */
+ fill(bool) {
+ if (bool === undefined) {
+ return !!this.fill_;
+ }
+ this.fill_ = !!bool;
+ if (bool) {
+ this.addClass('vjs-fill');
+ this.fluid(false);
+ } else {
+ this.removeClass('vjs-fill');
+ }
+ }
+
+ /**
+ * Get/Set the aspect ratio
+ *
+ * @param {string} [ratio]
+ * Aspect ratio for player
+ *
+ * @return {string|undefined}
+ * returns the current aspect ratio when getting
+ */
+
+ /**
+ * A getter/setter for the `Player`'s aspect ratio.
+ *
+ * @param {string} [ratio]
+ * The value to set the `Player`'s aspect ratio to.
+ *
+ * @return {string|undefined}
+ * - The current aspect ratio of the `Player` when getting.
+ * - undefined when setting
+ */
+ aspectRatio(ratio) {
+ if (ratio === undefined) {
+ return this.aspectRatio_;
+ }
+
+ // Check for width:height format
+ if (!/^\d+\:\d+$/.test(ratio)) {
+ throw new Error('Improper value supplied for aspect ratio. The format should be width:height, for example 16:9.');
+ }
+ this.aspectRatio_ = ratio;
+
+ // We're assuming if you set an aspect ratio you want fluid mode,
+ // because in fixed mode you could calculate width and height yourself.
+ this.fluid(true);
+ this.updateStyleEl_();
+ }
+
+ /**
+ * Update styles of the `Player` element (height, width and aspect ratio).
+ *
+ * @private
+ * @listens Tech#loadedmetadata
+ */
+ updateStyleEl_() {
+ if (window.VIDEOJS_NO_DYNAMIC_STYLE === true) {
+ const width = typeof this.width_ === 'number' ? this.width_ : this.options_.width;
+ const height = typeof this.height_ === 'number' ? this.height_ : this.options_.height;
+ const techEl = this.tech_ && this.tech_.el();
+ if (techEl) {
+ if (width >= 0) {
+ techEl.width = width;
+ }
+ if (height >= 0) {
+ techEl.height = height;
+ }
+ }
+ return;
+ }
+ let width;
+ let height;
+ let aspectRatio;
+ let idClass;
+
+ // The aspect ratio is either used directly or to calculate width and height.
+ if (this.aspectRatio_ !== undefined && this.aspectRatio_ !== 'auto') {
+ // Use any aspectRatio that's been specifically set
+ aspectRatio = this.aspectRatio_;
+ } else if (this.videoWidth() > 0) {
+ // Otherwise try to get the aspect ratio from the video metadata
+ aspectRatio = this.videoWidth() + ':' + this.videoHeight();
+ } else {
+ // Or use a default. The video element's is 2:1, but 16:9 is more common.
+ aspectRatio = '16:9';
+ }
+
+ // Get the ratio as a decimal we can use to calculate dimensions
+ const ratioParts = aspectRatio.split(':');
+ const ratioMultiplier = ratioParts[1] / ratioParts[0];
+ if (this.width_ !== undefined) {
+ // Use any width that's been specifically set
+ width = this.width_;
+ } else if (this.height_ !== undefined) {
+ // Or calculate the width from the aspect ratio if a height has been set
+ width = this.height_ / ratioMultiplier;
+ } else {
+ // Or use the video's metadata, or use the video el's default of 300
+ width = this.videoWidth() || 300;
+ }
+ if (this.height_ !== undefined) {
+ // Use any height that's been specifically set
+ height = this.height_;
+ } else {
+ // Otherwise calculate the height from the ratio and the width
+ height = width * ratioMultiplier;
+ }
+
+ // Ensure the CSS class is valid by starting with an alpha character
+ if (/^[^a-zA-Z]/.test(this.id())) {
+ idClass = 'dimensions-' + this.id();
+ } else {
+ idClass = this.id() + '-dimensions';
+ }
+
+ // Ensure the right class is still on the player for the style element
+ this.addClass(idClass);
+ setTextContent(this.styleEl_, `
+ .${idClass} {
+ width: ${width}px;
+ height: ${height}px;
+ }
+
+ .${idClass}.vjs-fluid:not(.vjs-audio-only-mode) {
+ padding-top: ${ratioMultiplier * 100}%;
+ }
+ `);
+ }
+
+ /**
+ * Load/Create an instance of playback {@link Tech} including element
+ * and API methods. Then append the `Tech` element in `Player` as a child.
+ *
+ * @param {string} techName
+ * name of the playback technology
+ *
+ * @param {string} source
+ * video source
+ *
+ * @private
+ */
+ loadTech_(techName, source) {
+ // Pause and remove current playback technology
+ if (this.tech_) {
+ this.unloadTech_();
+ }
+ const titleTechName = toTitleCase$1(techName);
+ const camelTechName = techName.charAt(0).toLowerCase() + techName.slice(1);
+
+ // get rid of the HTML5 video tag as soon as we are using another tech
+ if (titleTechName !== 'Html5' && this.tag) {
+ Tech.getTech('Html5').disposeMediaElement(this.tag);
+ this.tag.player = null;
+ this.tag = null;
+ }
+ this.techName_ = titleTechName;
+
+ // Turn off API access because we're loading a new tech that might load asynchronously
+ this.isReady_ = false;
+ let autoplay = this.autoplay();
+
+ // if autoplay is a string (or `true` with normalizeAutoplay: true) we pass false to the tech
+ // because the player is going to handle autoplay on `loadstart`
+ if (typeof this.autoplay() === 'string' || this.autoplay() === true && this.options_.normalizeAutoplay) {
+ autoplay = false;
+ }
+
+ // Grab tech-specific options from player options and add source and parent element to use.
+ const techOptions = {
+ source,
+ autoplay,
+ 'nativeControlsForTouch': this.options_.nativeControlsForTouch,
+ 'playerId': this.id(),
+ 'techId': `${this.id()}_${camelTechName}_api`,
+ 'playsinline': this.options_.playsinline,
+ 'preload': this.options_.preload,
+ 'loop': this.options_.loop,
+ 'disablePictureInPicture': this.options_.disablePictureInPicture,
+ 'muted': this.options_.muted,
+ 'poster': this.poster(),
+ 'language': this.language(),
+ 'playerElIngest': this.playerElIngest_ || false,
+ 'vtt.js': this.options_['vtt.js'],
+ 'canOverridePoster': !!this.options_.techCanOverridePoster,
+ 'enableSourceset': this.options_.enableSourceset
+ };
+ ALL.names.forEach(name => {
+ const props = ALL[name];
+ techOptions[props.getterName] = this[props.privateName];
+ });
+ Object.assign(techOptions, this.options_[titleTechName]);
+ Object.assign(techOptions, this.options_[camelTechName]);
+ Object.assign(techOptions, this.options_[techName.toLowerCase()]);
+ if (this.tag) {
+ techOptions.tag = this.tag;
+ }
+ if (source && source.src === this.cache_.src && this.cache_.currentTime > 0) {
+ techOptions.startTime = this.cache_.currentTime;
+ }
+
+ // Initialize tech instance
+ const TechClass = Tech.getTech(techName);
+ if (!TechClass) {
+ throw new Error(`No Tech named '${titleTechName}' exists! '${titleTechName}' should be registered using videojs.registerTech()'`);
+ }
+ this.tech_ = new TechClass(techOptions);
+
+ // player.triggerReady is always async, so don't need this to be async
+ this.tech_.ready(bind_(this, this.handleTechReady_), true);
+ textTrackConverter.jsonToTextTracks(this.textTracksJson_ || [], this.tech_);
+
+ // Listen to all HTML5-defined events and trigger them on the player
+ TECH_EVENTS_RETRIGGER.forEach(event => {
+ this.on(this.tech_, event, e => this[`handleTech${toTitleCase$1(event)}_`](e));
+ });
+ Object.keys(TECH_EVENTS_QUEUE).forEach(event => {
+ this.on(this.tech_, event, eventObj => {
+ if (this.tech_.playbackRate() === 0 && this.tech_.seeking()) {
+ this.queuedCallbacks_.push({
+ callback: this[`handleTech${TECH_EVENTS_QUEUE[event]}_`].bind(this),
+ event: eventObj
+ });
+ return;
+ }
+ this[`handleTech${TECH_EVENTS_QUEUE[event]}_`](eventObj);
+ });
+ });
+ this.on(this.tech_, 'loadstart', e => this.handleTechLoadStart_(e));
+ this.on(this.tech_, 'sourceset', e => this.handleTechSourceset_(e));
+ this.on(this.tech_, 'waiting', e => this.handleTechWaiting_(e));
+ this.on(this.tech_, 'ended', e => this.handleTechEnded_(e));
+ this.on(this.tech_, 'seeking', e => this.handleTechSeeking_(e));
+ this.on(this.tech_, 'play', e => this.handleTechPlay_(e));
+ this.on(this.tech_, 'pause', e => this.handleTechPause_(e));
+ this.on(this.tech_, 'durationchange', e => this.handleTechDurationChange_(e));
+ this.on(this.tech_, 'fullscreenchange', (e, data) => this.handleTechFullscreenChange_(e, data));
+ this.on(this.tech_, 'fullscreenerror', (e, err) => this.handleTechFullscreenError_(e, err));
+ this.on(this.tech_, 'enterpictureinpicture', e => this.handleTechEnterPictureInPicture_(e));
+ this.on(this.tech_, 'leavepictureinpicture', e => this.handleTechLeavePictureInPicture_(e));
+ this.on(this.tech_, 'error', e => this.handleTechError_(e));
+ this.on(this.tech_, 'posterchange', e => this.handleTechPosterChange_(e));
+ this.on(this.tech_, 'textdata', e => this.handleTechTextData_(e));
+ this.on(this.tech_, 'ratechange', e => this.handleTechRateChange_(e));
+ this.on(this.tech_, 'loadedmetadata', this.boundUpdateStyleEl_);
+ this.usingNativeControls(this.techGet_('controls'));
+ if (this.controls() && !this.usingNativeControls()) {
+ this.addTechControlsListeners_();
+ }
+
+ // Add the tech element in the DOM if it was not already there
+ // Make sure to not insert the original video element if using Html5
+ if (this.tech_.el().parentNode !== this.el() && (titleTechName !== 'Html5' || !this.tag)) {
+ prependTo(this.tech_.el(), this.el());
+ }
+
+ // Get rid of the original video tag reference after the first tech is loaded
+ if (this.tag) {
+ this.tag.player = null;
+ this.tag = null;
+ }
+ }
+
+ /**
+ * Unload and dispose of the current playback {@link Tech}.
+ *
+ * @private
+ */
+ unloadTech_() {
+ // Save the current text tracks so that we can reuse the same text tracks with the next tech
+ ALL.names.forEach(name => {
+ const props = ALL[name];
+ this[props.privateName] = this[props.getterName]();
+ });
+ this.textTracksJson_ = textTrackConverter.textTracksToJson(this.tech_);
+ this.isReady_ = false;
+ this.tech_.dispose();
+ this.tech_ = false;
+ if (this.isPosterFromTech_) {
+ this.poster_ = '';
+ this.trigger('posterchange');
+ }
+ this.isPosterFromTech_ = false;
+ }
+
+ /**
+ * Return a reference to the current {@link Tech}.
+ * It will print a warning by default about the danger of using the tech directly
+ * but any argument that is passed in will silence the warning.
+ *
+ * @param {*} [safety]
+ * Anything passed in to silence the warning
+ *
+ * @return {Tech}
+ * The Tech
+ */
+ tech(safety) {
+ if (safety === undefined) {
+ log$1.warn('Using the tech directly can be dangerous. I hope you know what you\'re doing.\n' + 'See https://github.com/videojs/video.js/issues/2617 for more info.\n');
+ }
+ return this.tech_;
+ }
+
+ /**
+ * An object that contains Video.js version.
+ *
+ * @typedef {Object} PlayerVersion
+ *
+ * @property {string} 'video.js' - Video.js version
+ */
+
+ /**
+ * Returns an object with Video.js version.
+ *
+ * @return {PlayerVersion}
+ * An object with Video.js version.
+ */
+ version() {
+ return {
+ 'video.js': version$5
+ };
+ }
+
+ /**
+ * Set up click and touch listeners for the playback element
+ *
+ * - On desktops: a click on the video itself will toggle playback
+ * - On mobile devices: a click on the video toggles controls
+ * which is done by toggling the user state between active and
+ * inactive
+ * - A tap can signal that a user has become active or has become inactive
+ * e.g. a quick tap on an iPhone movie should reveal the controls. Another
+ * quick tap should hide them again (signaling the user is in an inactive
+ * viewing state)
+ * - In addition to this, we still want the user to be considered inactive after
+ * a few seconds of inactivity.
+ *
+ * > Note: the only part of iOS interaction we can't mimic with this setup
+ * is a touch and hold on the video element counting as activity in order to
+ * keep the controls showing, but that shouldn't be an issue. A touch and hold
+ * on any controls will still keep the user active
+ *
+ * @private
+ */
+ addTechControlsListeners_() {
+ // Make sure to remove all the previous listeners in case we are called multiple times.
+ this.removeTechControlsListeners_();
+ this.on(this.tech_, 'click', this.boundHandleTechClick_);
+ this.on(this.tech_, 'dblclick', this.boundHandleTechDoubleClick_);
+
+ // If the controls were hidden we don't want that to change without a tap event
+ // so we'll check if the controls were already showing before reporting user
+ // activity
+ this.on(this.tech_, 'touchstart', this.boundHandleTechTouchStart_);
+ this.on(this.tech_, 'touchmove', this.boundHandleTechTouchMove_);
+ this.on(this.tech_, 'touchend', this.boundHandleTechTouchEnd_);
+
+ // The tap listener needs to come after the touchend listener because the tap
+ // listener cancels out any reportedUserActivity when setting userActive(false)
+ this.on(this.tech_, 'tap', this.boundHandleTechTap_);
+ }
+
+ /**
+ * Remove the listeners used for click and tap controls. This is needed for
+ * toggling to controls disabled, where a tap/touch should do nothing.
+ *
+ * @private
+ */
+ removeTechControlsListeners_() {
+ // We don't want to just use `this.off()` because there might be other needed
+ // listeners added by techs that extend this.
+ this.off(this.tech_, 'tap', this.boundHandleTechTap_);
+ this.off(this.tech_, 'touchstart', this.boundHandleTechTouchStart_);
+ this.off(this.tech_, 'touchmove', this.boundHandleTechTouchMove_);
+ this.off(this.tech_, 'touchend', this.boundHandleTechTouchEnd_);
+ this.off(this.tech_, 'click', this.boundHandleTechClick_);
+ this.off(this.tech_, 'dblclick', this.boundHandleTechDoubleClick_);
+ }
+
+ /**
+ * Player waits for the tech to be ready
+ *
+ * @private
+ */
+ handleTechReady_() {
+ this.triggerReady();
+
+ // Keep the same volume as before
+ if (this.cache_.volume) {
+ this.techCall_('setVolume', this.cache_.volume);
+ }
+
+ // Look if the tech found a higher resolution poster while loading
+ this.handleTechPosterChange_();
+
+ // Update the duration if available
+ this.handleTechDurationChange_();
+ }
+
+ /**
+ * Retrigger the `loadstart` event that was triggered by the {@link Tech}.
+ *
+ * @fires Player#loadstart
+ * @listens Tech#loadstart
+ * @private
+ */
+ handleTechLoadStart_() {
+ // TODO: Update to use `emptied` event instead. See #1277.
+
+ this.removeClass('vjs-ended', 'vjs-seeking');
+
+ // reset the error state
+ this.error(null);
+
+ // Update the duration
+ this.handleTechDurationChange_();
+ if (!this.paused()) {
+ /**
+ * Fired when the user agent begins looking for media data
+ *
+ * @event Player#loadstart
+ * @type {Event}
+ */
+ this.trigger('loadstart');
+ } else {
+ // reset the hasStarted state
+ this.hasStarted(false);
+ this.trigger('loadstart');
+ }
+
+ // autoplay happens after loadstart for the browser,
+ // so we mimic that behavior
+ this.manualAutoplay_(this.autoplay() === true && this.options_.normalizeAutoplay ? 'play' : this.autoplay());
+ }
+
+ /**
+ * Handle autoplay string values, rather than the typical boolean
+ * values that should be handled by the tech. Note that this is not
+ * part of any specification. Valid values and what they do can be
+ * found on the autoplay getter at Player#autoplay()
+ */
+ manualAutoplay_(type) {
+ if (!this.tech_ || typeof type !== 'string') {
+ return;
+ }
+
+ // Save original muted() value, set muted to true, and attempt to play().
+ // On promise rejection, restore muted from saved value
+ const resolveMuted = () => {
+ const previouslyMuted = this.muted();
+ this.muted(true);
+ const restoreMuted = () => {
+ this.muted(previouslyMuted);
+ };
+
+ // restore muted on play terminatation
+ this.playTerminatedQueue_.push(restoreMuted);
+ const mutedPromise = this.play();
+ if (!isPromise(mutedPromise)) {
+ return;
+ }
+ return mutedPromise.catch(err => {
+ restoreMuted();
+ throw new Error(`Rejection at manualAutoplay. Restoring muted value. ${err ? err : ''}`);
+ });
+ };
+ let promise;
+
+ // if muted defaults to true
+ // the only thing we can do is call play
+ if (type === 'any' && !this.muted()) {
+ promise = this.play();
+ if (isPromise(promise)) {
+ promise = promise.catch(resolveMuted);
+ }
+ } else if (type === 'muted' && !this.muted()) {
+ promise = resolveMuted();
+ } else {
+ promise = this.play();
+ }
+ if (!isPromise(promise)) {
+ return;
+ }
+ return promise.then(() => {
+ this.trigger({
+ type: 'autoplay-success',
+ autoplay: type
+ });
+ }).catch(() => {
+ this.trigger({
+ type: 'autoplay-failure',
+ autoplay: type
+ });
+ });
+ }
+
+ /**
+ * Update the internal source caches so that we return the correct source from
+ * `src()`, `currentSource()`, and `currentSources()`.
+ *
+ * > Note: `currentSources` will not be updated if the source that is passed in exists
+ * in the current `currentSources` cache.
+ *
+ *
+ * @param {Tech~SourceObject} srcObj
+ * A string or object source to update our caches to.
+ */
+ updateSourceCaches_(srcObj = '') {
+ let src = srcObj;
+ let type = '';
+ if (typeof src !== 'string') {
+ src = srcObj.src;
+ type = srcObj.type;
+ }
+
+ // make sure all the caches are set to default values
+ // to prevent null checking
+ this.cache_.source = this.cache_.source || {};
+ this.cache_.sources = this.cache_.sources || [];
+
+ // try to get the type of the src that was passed in
+ if (src && !type) {
+ type = findMimetype(this, src);
+ }
+
+ // update `currentSource` cache always
+ this.cache_.source = merge$2({}, srcObj, {
+ src,
+ type
+ });
+ const matchingSources = this.cache_.sources.filter(s => s.src && s.src === src);
+ const sourceElSources = [];
+ const sourceEls = this.$$('source');
+ const matchingSourceEls = [];
+ for (let i = 0; i < sourceEls.length; i++) {
+ const sourceObj = getAttributes(sourceEls[i]);
+ sourceElSources.push(sourceObj);
+ if (sourceObj.src && sourceObj.src === src) {
+ matchingSourceEls.push(sourceObj.src);
+ }
+ }
+
+ // if we have matching source els but not matching sources
+ // the current source cache is not up to date
+ if (matchingSourceEls.length && !matchingSources.length) {
+ this.cache_.sources = sourceElSources;
+ // if we don't have matching source or source els set the
+ // sources cache to the `currentSource` cache
+ } else if (!matchingSources.length) {
+ this.cache_.sources = [this.cache_.source];
+ }
+
+ // update the tech `src` cache
+ this.cache_.src = src;
+ }
+
+ /**
+ * *EXPERIMENTAL* Fired when the source is set or changed on the {@link Tech}
+ * causing the media element to reload.
+ *
+ * It will fire for the initial source and each subsequent source.
+ * This event is a custom event from Video.js and is triggered by the {@link Tech}.
+ *
+ * The event object for this event contains a `src` property that will contain the source
+ * that was available when the event was triggered. This is generally only necessary if Video.js
+ * is switching techs while the source was being changed.
+ *
+ * It is also fired when `load` is called on the player (or media element)
+ * because the {@link https://html.spec.whatwg.org/multipage/media.html#dom-media-load|specification for `load`}
+ * says that the resource selection algorithm needs to be aborted and restarted.
+ * In this case, it is very likely that the `src` property will be set to the
+ * empty string `""` to indicate we do not know what the source will be but
+ * that it is changing.
+ *
+ * *This event is currently still experimental and may change in minor releases.*
+ * __To use this, pass `enableSourceset` option to the player.__
+ *
+ * @event Player#sourceset
+ * @type {Event}
+ * @prop {string} src
+ * The source url available when the `sourceset` was triggered.
+ * It will be an empty string if we cannot know what the source is
+ * but know that the source will change.
+ */
+ /**
+ * Retrigger the `sourceset` event that was triggered by the {@link Tech}.
+ *
+ * @fires Player#sourceset
+ * @listens Tech#sourceset
+ * @private
+ */
+ handleTechSourceset_(event) {
+ // only update the source cache when the source
+ // was not updated using the player api
+ if (!this.changingSrc_) {
+ let updateSourceCaches = src => this.updateSourceCaches_(src);
+ const playerSrc = this.currentSource().src;
+ const eventSrc = event.src;
+
+ // if we have a playerSrc that is not a blob, and a tech src that is a blob
+ if (playerSrc && !/^blob:/.test(playerSrc) && /^blob:/.test(eventSrc)) {
+ // if both the tech source and the player source were updated we assume
+ // something like @videojs/http-streaming did the sourceset and skip updating the source cache.
+ if (!this.lastSource_ || this.lastSource_.tech !== eventSrc && this.lastSource_.player !== playerSrc) {
+ updateSourceCaches = () => {};
+ }
+ }
+
+ // update the source to the initial source right away
+ // in some cases this will be empty string
+ updateSourceCaches(eventSrc);
+
+ // if the `sourceset` `src` was an empty string
+ // wait for a `loadstart` to update the cache to `currentSrc`.
+ // If a sourceset happens before a `loadstart`, we reset the state
+ if (!event.src) {
+ this.tech_.any(['sourceset', 'loadstart'], e => {
+ // if a sourceset happens before a `loadstart` there
+ // is nothing to do as this `handleTechSourceset_`
+ // will be called again and this will be handled there.
+ if (e.type === 'sourceset') {
+ return;
+ }
+ const techSrc = this.techGet_('currentSrc');
+ this.lastSource_.tech = techSrc;
+ this.updateSourceCaches_(techSrc);
+ });
+ }
+ }
+ this.lastSource_ = {
+ player: this.currentSource().src,
+ tech: event.src
+ };
+ this.trigger({
+ src: event.src,
+ type: 'sourceset'
+ });
+ }
+
+ /**
+ * Add/remove the vjs-has-started class
+ *
+ *
+ * @param {boolean} request
+ * - true: adds the class
+ * - false: remove the class
+ *
+ * @return {boolean}
+ * the boolean value of hasStarted_
+ */
+ hasStarted(request) {
+ if (request === undefined) {
+ // act as getter, if we have no request to change
+ return this.hasStarted_;
+ }
+ if (request === this.hasStarted_) {
+ return;
+ }
+ this.hasStarted_ = request;
+ if (this.hasStarted_) {
+ this.addClass('vjs-has-started');
+ } else {
+ this.removeClass('vjs-has-started');
+ }
+ }
+
+ /**
+ * Fired whenever the media begins or resumes playback
+ *
+ * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#dom-media-play}
+ * @fires Player#play
+ * @listens Tech#play
+ * @private
+ */
+ handleTechPlay_() {
+ this.removeClass('vjs-ended', 'vjs-paused');
+ this.addClass('vjs-playing');
+
+ // hide the poster when the user hits play
+ this.hasStarted(true);
+ /**
+ * Triggered whenever an {@link Tech#play} event happens. Indicates that
+ * playback has started or resumed.
+ *
+ * @event Player#play
+ * @type {Event}
+ */
+ this.trigger('play');
+ }
+
+ /**
+ * Retrigger the `ratechange` event that was triggered by the {@link Tech}.
+ *
+ * If there were any events queued while the playback rate was zero, fire
+ * those events now.
+ *
+ * @private
+ * @method Player#handleTechRateChange_
+ * @fires Player#ratechange
+ * @listens Tech#ratechange
+ */
+ handleTechRateChange_() {
+ if (this.tech_.playbackRate() > 0 && this.cache_.lastPlaybackRate === 0) {
+ this.queuedCallbacks_.forEach(queued => queued.callback(queued.event));
+ this.queuedCallbacks_ = [];
+ }
+ this.cache_.lastPlaybackRate = this.tech_.playbackRate();
+ /**
+ * Fires when the playing speed of the audio/video is changed
+ *
+ * @event Player#ratechange
+ * @type {event}
+ */
+ this.trigger('ratechange');
+ }
+
+ /**
+ * Retrigger the `waiting` event that was triggered by the {@link Tech}.
+ *
+ * @fires Player#waiting
+ * @listens Tech#waiting
+ * @private
+ */
+ handleTechWaiting_() {
+ this.addClass('vjs-waiting');
+ /**
+ * A readyState change on the DOM element has caused playback to stop.
+ *
+ * @event Player#waiting
+ * @type {Event}
+ */
+ this.trigger('waiting');
+
+ // Browsers may emit a timeupdate event after a waiting event. In order to prevent
+ // premature removal of the waiting class, wait for the time to change.
+ const timeWhenWaiting = this.currentTime();
+ const timeUpdateListener = () => {
+ if (timeWhenWaiting !== this.currentTime()) {
+ this.removeClass('vjs-waiting');
+ this.off('timeupdate', timeUpdateListener);
+ }
+ };
+ this.on('timeupdate', timeUpdateListener);
+ }
+
+ /**
+ * Retrigger the `canplay` event that was triggered by the {@link Tech}.
+ * > Note: This is not consistent between browsers. See #1351
+ *
+ * @fires Player#canplay
+ * @listens Tech#canplay
+ * @private
+ */
+ handleTechCanPlay_() {
+ this.removeClass('vjs-waiting');
+ /**
+ * The media has a readyState of HAVE_FUTURE_DATA or greater.
+ *
+ * @event Player#canplay
+ * @type {Event}
+ */
+ this.trigger('canplay');
+ }
+
+ /**
+ * Retrigger the `canplaythrough` event that was triggered by the {@link Tech}.
+ *
+ * @fires Player#canplaythrough
+ * @listens Tech#canplaythrough
+ * @private
+ */
+ handleTechCanPlayThrough_() {
+ this.removeClass('vjs-waiting');
+ /**
+ * The media has a readyState of HAVE_ENOUGH_DATA or greater. This means that the
+ * entire media file can be played without buffering.
+ *
+ * @event Player#canplaythrough
+ * @type {Event}
+ */
+ this.trigger('canplaythrough');
+ }
+
+ /**
+ * Retrigger the `playing` event that was triggered by the {@link Tech}.
+ *
+ * @fires Player#playing
+ * @listens Tech#playing
+ * @private
+ */
+ handleTechPlaying_() {
+ this.removeClass('vjs-waiting');
+ /**
+ * The media is no longer blocked from playback, and has started playing.
+ *
+ * @event Player#playing
+ * @type {Event}
+ */
+ this.trigger('playing');
+ }
+
+ /**
+ * Retrigger the `seeking` event that was triggered by the {@link Tech}.
+ *
+ * @fires Player#seeking
+ * @listens Tech#seeking
+ * @private
+ */
+ handleTechSeeking_() {
+ this.addClass('vjs-seeking');
+ /**
+ * Fired whenever the player is jumping to a new time
+ *
+ * @event Player#seeking
+ * @type {Event}
+ */
+ this.trigger('seeking');
+ }
+
+ /**
+ * Retrigger the `seeked` event that was triggered by the {@link Tech}.
+ *
+ * @fires Player#seeked
+ * @listens Tech#seeked
+ * @private
+ */
+ handleTechSeeked_() {
+ this.removeClass('vjs-seeking', 'vjs-ended');
+ /**
+ * Fired when the player has finished jumping to a new time
+ *
+ * @event Player#seeked
+ * @type {Event}
+ */
+ this.trigger('seeked');
+ }
+
+ /**
+ * Retrigger the `pause` event that was triggered by the {@link Tech}.
+ *
+ * @fires Player#pause
+ * @listens Tech#pause
+ * @private
+ */
+ handleTechPause_() {
+ this.removeClass('vjs-playing');
+ this.addClass('vjs-paused');
+ /**
+ * Fired whenever the media has been paused
+ *
+ * @event Player#pause
+ * @type {Event}
+ */
+ this.trigger('pause');
+ }
+
+ /**
+ * Retrigger the `ended` event that was triggered by the {@link Tech}.
+ *
+ * @fires Player#ended
+ * @listens Tech#ended
+ * @private
+ */
+ handleTechEnded_() {
+ this.addClass('vjs-ended');
+ this.removeClass('vjs-waiting');
+ if (this.options_.loop) {
+ this.currentTime(0);
+ this.play();
+ } else if (!this.paused()) {
+ this.pause();
+ }
+
+ /**
+ * Fired when the end of the media resource is reached (currentTime == duration)
+ *
+ * @event Player#ended
+ * @type {Event}
+ */
+ this.trigger('ended');
+ }
+
+ /**
+ * Fired when the duration of the media resource is first known or changed
+ *
+ * @listens Tech#durationchange
+ * @private
+ */
+ handleTechDurationChange_() {
+ this.duration(this.techGet_('duration'));
+ }
+
+ /**
+ * Handle a click on the media element to play/pause
+ *
+ * @param {Event} event
+ * the event that caused this function to trigger
+ *
+ * @listens Tech#click
+ * @private
+ */
+ handleTechClick_(event) {
+ // When controls are disabled a click should not toggle playback because
+ // the click is considered a control
+ if (!this.controls_) {
+ return;
+ }
+ if (this.options_ === undefined || this.options_.userActions === undefined || this.options_.userActions.click === undefined || this.options_.userActions.click !== false) {
+ if (this.options_ !== undefined && this.options_.userActions !== undefined && typeof this.options_.userActions.click === 'function') {
+ this.options_.userActions.click.call(this, event);
+ } else if (this.paused()) {
+ silencePromise(this.play());
+ } else {
+ this.pause();
+ }
+ }
+ }
+
+ /**
+ * Handle a double-click on the media element to enter/exit fullscreen
+ *
+ * @param {Event} event
+ * the event that caused this function to trigger
+ *
+ * @listens Tech#dblclick
+ * @private
+ */
+ handleTechDoubleClick_(event) {
+ if (!this.controls_) {
+ return;
+ }
+
+ // we do not want to toggle fullscreen state
+ // when double-clicking inside a control bar or a modal
+ const inAllowedEls = Array.prototype.some.call(this.$$('.vjs-control-bar, .vjs-modal-dialog'), el => el.contains(event.target));
+ if (!inAllowedEls) {
+ /*
+ * options.userActions.doubleClick
+ *
+ * If `undefined` or `true`, double-click toggles fullscreen if controls are present
+ * Set to `false` to disable double-click handling
+ * Set to a function to substitute an external double-click handler
+ */
+ if (this.options_ === undefined || this.options_.userActions === undefined || this.options_.userActions.doubleClick === undefined || this.options_.userActions.doubleClick !== false) {
+ if (this.options_ !== undefined && this.options_.userActions !== undefined && typeof this.options_.userActions.doubleClick === 'function') {
+ this.options_.userActions.doubleClick.call(this, event);
+ } else if (this.isFullscreen()) {
+ this.exitFullscreen();
+ } else {
+ this.requestFullscreen();
+ }
+ }
+ }
+ }
+
+ /**
+ * Handle a tap on the media element. It will toggle the user
+ * activity state, which hides and shows the controls.
+ *
+ * @listens Tech#tap
+ * @private
+ */
+ handleTechTap_() {
+ this.userActive(!this.userActive());
+ }
+
+ /**
+ * Handle touch to start
+ *
+ * @listens Tech#touchstart
+ * @private
+ */
+ handleTechTouchStart_() {
+ this.userWasActive = this.userActive();
+ }
+
+ /**
+ * Handle touch to move
+ *
+ * @listens Tech#touchmove
+ * @private
+ */
+ handleTechTouchMove_() {
+ if (this.userWasActive) {
+ this.reportUserActivity();
+ }
+ }
+
+ /**
+ * Handle touch to end
+ *
+ * @param {Event} event
+ * the touchend event that triggered
+ * this function
+ *
+ * @listens Tech#touchend
+ * @private
+ */
+ handleTechTouchEnd_(event) {
+ // Stop the mouse events from also happening
+ if (event.cancelable) {
+ event.preventDefault();
+ }
+ }
+
+ /**
+ * @private
+ */
+ toggleFullscreenClass_() {
+ if (this.isFullscreen()) {
+ this.addClass('vjs-fullscreen');
+ } else {
+ this.removeClass('vjs-fullscreen');
+ }
+ }
+
+ /**
+ * when the document fschange event triggers it calls this
+ */
+ documentFullscreenChange_(e) {
+ const targetPlayer = e.target.player;
+
+ // if another player was fullscreen
+ // do a null check for targetPlayer because older firefox's would put document as e.target
+ if (targetPlayer && targetPlayer !== this) {
+ return;
+ }
+ const el = this.el();
+ let isFs = document[this.fsApi_.fullscreenElement] === el;
+ if (!isFs && el.matches) {
+ isFs = el.matches(':' + this.fsApi_.fullscreen);
+ }
+ this.isFullscreen(isFs);
+ }
+
+ /**
+ * Handle Tech Fullscreen Change
+ *
+ * @param {Event} event
+ * the fullscreenchange event that triggered this function
+ *
+ * @param {Object} data
+ * the data that was sent with the event
+ *
+ * @private
+ * @listens Tech#fullscreenchange
+ * @fires Player#fullscreenchange
+ */
+ handleTechFullscreenChange_(event, data) {
+ if (data) {
+ if (data.nativeIOSFullscreen) {
+ this.addClass('vjs-ios-native-fs');
+ this.tech_.one('webkitendfullscreen', () => {
+ this.removeClass('vjs-ios-native-fs');
+ });
+ }
+ this.isFullscreen(data.isFullscreen);
+ }
+ }
+ handleTechFullscreenError_(event, err) {
+ this.trigger('fullscreenerror', err);
+ }
+
+ /**
+ * @private
+ */
+ togglePictureInPictureClass_() {
+ if (this.isInPictureInPicture()) {
+ this.addClass('vjs-picture-in-picture');
+ } else {
+ this.removeClass('vjs-picture-in-picture');
+ }
+ }
+
+ /**
+ * Handle Tech Enter Picture-in-Picture.
+ *
+ * @param {Event} event
+ * the enterpictureinpicture event that triggered this function
+ *
+ * @private
+ * @listens Tech#enterpictureinpicture
+ */
+ handleTechEnterPictureInPicture_(event) {
+ this.isInPictureInPicture(true);
+ }
+
+ /**
+ * Handle Tech Leave Picture-in-Picture.
+ *
+ * @param {Event} event
+ * the leavepictureinpicture event that triggered this function
+ *
+ * @private
+ * @listens Tech#leavepictureinpicture
+ */
+ handleTechLeavePictureInPicture_(event) {
+ this.isInPictureInPicture(false);
+ }
+
+ /**
+ * Fires when an error occurred during the loading of an audio/video.
+ *
+ * @private
+ * @listens Tech#error
+ */
+ handleTechError_() {
+ const error = this.tech_.error();
+ if (error) {
+ this.error(error);
+ }
+ }
+
+ /**
+ * Retrigger the `textdata` event that was triggered by the {@link Tech}.
+ *
+ * @fires Player#textdata
+ * @listens Tech#textdata
+ * @private
+ */
+ handleTechTextData_() {
+ let data = null;
+ if (arguments.length > 1) {
+ data = arguments[1];
+ }
+
+ /**
+ * Fires when we get a textdata event from tech
+ *
+ * @event Player#textdata
+ * @type {Event}
+ */
+ this.trigger('textdata', data);
+ }
+
+ /**
+ * Get object for cached values.
+ *
+ * @return {Object}
+ * get the current object cache
+ */
+ getCache() {
+ return this.cache_;
+ }
+
+ /**
+ * Resets the internal cache object.
+ *
+ * Using this function outside the player constructor or reset method may
+ * have unintended side-effects.
+ *
+ * @private
+ */
+ resetCache_() {
+ this.cache_ = {
+ // Right now, the currentTime is not _really_ cached because it is always
+ // retrieved from the tech (see: currentTime). However, for completeness,
+ // we set it to zero here to ensure that if we do start actually caching
+ // it, we reset it along with everything else.
+ currentTime: 0,
+ initTime: 0,
+ inactivityTimeout: this.options_.inactivityTimeout,
+ duration: NaN,
+ lastVolume: 1,
+ lastPlaybackRate: this.defaultPlaybackRate(),
+ media: null,
+ src: '',
+ source: {},
+ sources: [],
+ playbackRates: [],
+ volume: 1
+ };
+ }
+
+ /**
+ * Pass values to the playback tech
+ *
+ * @param {string} [method]
+ * the method to call
+ *
+ * @param {Object} [arg]
+ * the argument to pass
+ *
+ * @private
+ */
+ techCall_(method, arg) {
+ // If it's not ready yet, call method when it is
+
+ this.ready(function () {
+ if (method in allowedSetters) {
+ return set(this.middleware_, this.tech_, method, arg);
+ } else if (method in allowedMediators) {
+ return mediate(this.middleware_, this.tech_, method, arg);
+ }
+ try {
+ if (this.tech_) {
+ this.tech_[method](arg);
+ }
+ } catch (e) {
+ log$1(e);
+ throw e;
+ }
+ }, true);
+ }
+
+ /**
+ * Mediate attempt to call playback tech method
+ * and return the value of the method called.
+ *
+ * @param {string} method
+ * Tech method
+ *
+ * @return {*}
+ * Value returned by the tech method called, undefined if tech
+ * is not ready or tech method is not present
+ *
+ * @private
+ */
+ techGet_(method) {
+ if (!this.tech_ || !this.tech_.isReady_) {
+ return;
+ }
+ if (method in allowedGetters) {
+ return get(this.middleware_, this.tech_, method);
+ } else if (method in allowedMediators) {
+ return mediate(this.middleware_, this.tech_, method);
+ }
+
+ // Log error when playback tech object is present but method
+ // is undefined or unavailable
+ try {
+ return this.tech_[method]();
+ } catch (e) {
+ // When building additional tech libs, an expected method may not be defined yet
+ if (this.tech_[method] === undefined) {
+ log$1(`Video.js: ${method} method not defined for ${this.techName_} playback technology.`, e);
+ throw e;
+ }
+
+ // When a method isn't available on the object it throws a TypeError
+ if (e.name === 'TypeError') {
+ log$1(`Video.js: ${method} unavailable on ${this.techName_} playback technology element.`, e);
+ this.tech_.isReady_ = false;
+ throw e;
+ }
+
+ // If error unknown, just log and throw
+ log$1(e);
+ throw e;
+ }
+ }
+
+ /**
+ * Attempt to begin playback at the first opportunity.
+ *
+ * @return {Promise|undefined}
+ * Returns a promise if the browser supports Promises (or one
+ * was passed in as an option). This promise will be resolved on
+ * the return value of play. If this is undefined it will fulfill the
+ * promise chain otherwise the promise chain will be fulfilled when
+ * the promise from play is fulfilled.
+ */
+ play() {
+ return new Promise(resolve => {
+ this.play_(resolve);
+ });
+ }
+
+ /**
+ * The actual logic for play, takes a callback that will be resolved on the
+ * return value of play. This allows us to resolve to the play promise if there
+ * is one on modern browsers.
+ *
+ * @private
+ * @param {Function} [callback]
+ * The callback that should be called when the techs play is actually called
+ */
+ play_(callback = silencePromise) {
+ this.playCallbacks_.push(callback);
+ const isSrcReady = Boolean(!this.changingSrc_ && (this.src() || this.currentSrc()));
+ const isSafariOrIOS = Boolean(IS_ANY_SAFARI || IS_IOS);
+
+ // treat calls to play_ somewhat like the `one` event function
+ if (this.waitToPlay_) {
+ this.off(['ready', 'loadstart'], this.waitToPlay_);
+ this.waitToPlay_ = null;
+ }
+
+ // if the player/tech is not ready or the src itself is not ready
+ // queue up a call to play on `ready` or `loadstart`
+ if (!this.isReady_ || !isSrcReady) {
+ this.waitToPlay_ = e => {
+ this.play_();
+ };
+ this.one(['ready', 'loadstart'], this.waitToPlay_);
+
+ // if we are in Safari, there is a high chance that loadstart will trigger after the gesture timeperiod
+ // in that case, we need to prime the video element by calling load so it'll be ready in time
+ if (!isSrcReady && isSafariOrIOS) {
+ this.load();
+ }
+ return;
+ }
+
+ // If the player/tech is ready and we have a source, we can attempt playback.
+ const val = this.techGet_('play');
+
+ // For native playback, reset the progress bar if we get a play call from a replay.
+ const isNativeReplay = isSafariOrIOS && this.hasClass('vjs-ended');
+ if (isNativeReplay) {
+ this.resetProgressBar_();
+ }
+ // play was terminated if the returned value is null
+ if (val === null) {
+ this.runPlayTerminatedQueue_();
+ } else {
+ this.runPlayCallbacks_(val);
+ }
+ }
+
+ /**
+ * These functions will be run when if play is terminated. If play
+ * runPlayCallbacks_ is run these function will not be run. This allows us
+ * to differentiate between a terminated play and an actual call to play.
+ */
+ runPlayTerminatedQueue_() {
+ const queue = this.playTerminatedQueue_.slice(0);
+ this.playTerminatedQueue_ = [];
+ queue.forEach(function (q) {
+ q();
+ });
+ }
+
+ /**
+ * When a callback to play is delayed we have to run these
+ * callbacks when play is actually called on the tech. This function
+ * runs the callbacks that were delayed and accepts the return value
+ * from the tech.
+ *
+ * @param {undefined|Promise} val
+ * The return value from the tech.
+ */
+ runPlayCallbacks_(val) {
+ const callbacks = this.playCallbacks_.slice(0);
+ this.playCallbacks_ = [];
+ // clear play terminatedQueue since we finished a real play
+ this.playTerminatedQueue_ = [];
+ callbacks.forEach(function (cb) {
+ cb(val);
+ });
+ }
+
+ /**
+ * Pause the video playback
+ */
+ pause() {
+ this.techCall_('pause');
+ }
+
+ /**
+ * Check if the player is paused or has yet to play
+ *
+ * @return {boolean}
+ * - false: if the media is currently playing
+ * - true: if media is not currently playing
+ */
+ paused() {
+ // The initial state of paused should be true (in Safari it's actually false)
+ return this.techGet_('paused') === false ? false : true;
+ }
+
+ /**
+ * Get a TimeRange object representing the current ranges of time that the user
+ * has played.
+ *
+ * @return { import('./utils/time').TimeRange }
+ * A time range object that represents all the increments of time that have
+ * been played.
+ */
+ played() {
+ return this.techGet_('played') || createTimeRanges$1(0, 0);
+ }
+
+ /**
+ * Sets or returns whether or not the user is "scrubbing". Scrubbing is
+ * when the user has clicked the progress bar handle and is
+ * dragging it along the progress bar.
+ *
+ * @param {boolean} [isScrubbing]
+ * whether the user is or is not scrubbing
+ *
+ * @return {boolean|undefined}
+ * - The value of scrubbing when getting
+ * - Nothing when setting
+ */
+ scrubbing(isScrubbing) {
+ if (typeof isScrubbing === 'undefined') {
+ return this.scrubbing_;
+ }
+ this.scrubbing_ = !!isScrubbing;
+ this.techCall_('setScrubbing', this.scrubbing_);
+ if (isScrubbing) {
+ this.addClass('vjs-scrubbing');
+ } else {
+ this.removeClass('vjs-scrubbing');
+ }
+ }
+
+ /**
+ * Get or set the current time (in seconds)
+ *
+ * @param {number|string} [seconds]
+ * The time to seek to in seconds
+ *
+ * @return {number|undefined}
+ * - the current time in seconds when getting
+ * - Nothing when setting
+ */
+ currentTime(seconds) {
+ if (seconds === undefined) {
+ // cache last currentTime and return. default to 0 seconds
+ //
+ // Caching the currentTime is meant to prevent a massive amount of reads on the tech's
+ // currentTime when scrubbing, but may not provide much performance benefit after all.
+ // Should be tested. Also something has to read the actual current time or the cache will
+ // never get updated.
+ this.cache_.currentTime = this.techGet_('currentTime') || 0;
+ return this.cache_.currentTime;
+ }
+ if (seconds < 0) {
+ seconds = 0;
+ }
+ if (!this.isReady_ || this.changingSrc_ || !this.tech_ || !this.tech_.isReady_) {
+ this.cache_.initTime = seconds;
+ this.off('canplay', this.boundApplyInitTime_);
+ this.one('canplay', this.boundApplyInitTime_);
+ return;
+ }
+ this.techCall_('setCurrentTime', seconds);
+ this.cache_.initTime = 0;
+ if (isFinite(seconds)) {
+ this.cache_.currentTime = Number(seconds);
+ }
+ }
+
+ /**
+ * Apply the value of initTime stored in cache as currentTime.
+ *
+ * @private
+ */
+ applyInitTime_() {
+ this.currentTime(this.cache_.initTime);
+ }
+
+ /**
+ * Normally gets the length in time of the video in seconds;
+ * in all but the rarest use cases an argument will NOT be passed to the method
+ *
+ * > **NOTE**: The video must have started loading before the duration can be
+ * known, and depending on preload behaviour may not be known until the video starts
+ * playing.
+ *
+ * @fires Player#durationchange
+ *
+ * @param {number} [seconds]
+ * The duration of the video to set in seconds
+ *
+ * @return {number|undefined}
+ * - The duration of the video in seconds when getting
+ * - Nothing when setting
+ */
+ duration(seconds) {
+ if (seconds === undefined) {
+ // return NaN if the duration is not known
+ return this.cache_.duration !== undefined ? this.cache_.duration : NaN;
+ }
+ seconds = parseFloat(seconds);
+
+ // Standardize on Infinity for signaling video is live
+ if (seconds < 0) {
+ seconds = Infinity;
+ }
+ if (seconds !== this.cache_.duration) {
+ // Cache the last set value for optimized scrubbing
+ this.cache_.duration = seconds;
+ if (seconds === Infinity) {
+ this.addClass('vjs-live');
+ } else {
+ this.removeClass('vjs-live');
+ }
+ if (!isNaN(seconds)) {
+ // Do not fire durationchange unless the duration value is known.
+ // @see [Spec]{@link https://www.w3.org/TR/2011/WD-html5-20110113/video.html#media-element-load-algorithm}
+
+ /**
+ * @event Player#durationchange
+ * @type {Event}
+ */
+ this.trigger('durationchange');
+ }
+ }
+ }
+
+ /**
+ * Calculates how much time is left in the video. Not part
+ * of the native video API.
+ *
+ * @return {number}
+ * The time remaining in seconds
+ */
+ remainingTime() {
+ return this.duration() - this.currentTime();
+ }
+
+ /**
+ * A remaining time function that is intended to be used when
+ * the time is to be displayed directly to the user.
+ *
+ * @return {number}
+ * The rounded time remaining in seconds
+ */
+ remainingTimeDisplay() {
+ return Math.floor(this.duration()) - Math.floor(this.currentTime());
+ }
+
+ //
+ // Kind of like an array of portions of the video that have been downloaded.
+
+ /**
+ * Get a TimeRange object with an array of the times of the video
+ * that have been downloaded. If you just want the percent of the
+ * video that's been downloaded, use bufferedPercent.
+ *
+ * @see [Buffered Spec]{@link http://dev.w3.org/html5/spec/video.html#dom-media-buffered}
+ *
+ * @return { import('./utils/time').TimeRange }
+ * A mock {@link TimeRanges} object (following HTML spec)
+ */
+ buffered() {
+ let buffered = this.techGet_('buffered');
+ if (!buffered || !buffered.length) {
+ buffered = createTimeRanges$1(0, 0);
+ }
+ return buffered;
+ }
+
+ /**
+ * Get the TimeRanges of the media that are currently available
+ * for seeking to.
+ *
+ * @see [Seekable Spec]{@link https://html.spec.whatwg.org/multipage/media.html#dom-media-seekable}
+ *
+ * @return { import('./utils/time').TimeRange }
+ * A mock {@link TimeRanges} object (following HTML spec)
+ */
+ seekable() {
+ let seekable = this.techGet_('seekable');
+ if (!seekable || !seekable.length) {
+ seekable = createTimeRanges$1(0, 0);
+ }
+ return seekable;
+ }
+
+ /**
+ * Returns whether the player is in the "seeking" state.
+ *
+ * @return {boolean} True if the player is in the seeking state, false if not.
+ */
+ seeking() {
+ return this.techGet_('seeking');
+ }
+
+ /**
+ * Returns whether the player is in the "ended" state.
+ *
+ * @return {boolean} True if the player is in the ended state, false if not.
+ */
+ ended() {
+ return this.techGet_('ended');
+ }
+
+ /**
+ * Returns the current state of network activity for the element, from
+ * the codes in the list below.
+ * - NETWORK_EMPTY (numeric value 0)
+ * The element has not yet been initialised. All attributes are in
+ * their initial states.
+ * - NETWORK_IDLE (numeric value 1)
+ * The element's resource selection algorithm is active and has
+ * selected a resource, but it is not actually using the network at
+ * this time.
+ * - NETWORK_LOADING (numeric value 2)
+ * The user agent is actively trying to download data.
+ * - NETWORK_NO_SOURCE (numeric value 3)
+ * The element's resource selection algorithm is active, but it has
+ * not yet found a resource to use.
+ *
+ * @see https://html.spec.whatwg.org/multipage/embedded-content.html#network-states
+ * @return {number} the current network activity state
+ */
+ networkState() {
+ return this.techGet_('networkState');
+ }
+
+ /**
+ * Returns a value that expresses the current state of the element
+ * with respect to rendering the current playback position, from the
+ * codes in the list below.
+ * - HAVE_NOTHING (numeric value 0)
+ * No information regarding the media resource is available.
+ * - HAVE_METADATA (numeric value 1)
+ * Enough of the resource has been obtained that the duration of the
+ * resource is available.
+ * - HAVE_CURRENT_DATA (numeric value 2)
+ * Data for the immediate current playback position is available.
+ * - HAVE_FUTURE_DATA (numeric value 3)
+ * Data for the immediate current playback position is available, as
+ * well as enough data for the user agent to advance the current
+ * playback position in the direction of playback.
+ * - HAVE_ENOUGH_DATA (numeric value 4)
+ * The user agent estimates that enough data is available for
+ * playback to proceed uninterrupted.
+ *
+ * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-media-readystate
+ * @return {number} the current playback rendering state
+ */
+ readyState() {
+ return this.techGet_('readyState');
+ }
+
+ /**
+ * Get the percent (as a decimal) of the video that's been downloaded.
+ * This method is not a part of the native HTML video API.
+ *
+ * @return {number}
+ * A decimal between 0 and 1 representing the percent
+ * that is buffered 0 being 0% and 1 being 100%
+ */
+ bufferedPercent() {
+ return bufferedPercent(this.buffered(), this.duration());
+ }
+
+ /**
+ * Get the ending time of the last buffered time range
+ * This is used in the progress bar to encapsulate all time ranges.
+ *
+ * @return {number}
+ * The end of the last buffered time range
+ */
+ bufferedEnd() {
+ const buffered = this.buffered();
+ const duration = this.duration();
+ let end = buffered.end(buffered.length - 1);
+ if (end > duration) {
+ end = duration;
+ }
+ return end;
+ }
+
+ /**
+ * Get or set the current volume of the media
+ *
+ * @param {number} [percentAsDecimal]
+ * The new volume as a decimal percent:
+ * - 0 is muted/0%/off
+ * - 1.0 is 100%/full
+ * - 0.5 is half volume or 50%
+ *
+ * @return {number|undefined}
+ * The current volume as a percent when getting
+ */
+ volume(percentAsDecimal) {
+ let vol;
+ if (percentAsDecimal !== undefined) {
+ // Force value to between 0 and 1
+ vol = Math.max(0, Math.min(1, percentAsDecimal));
+ this.cache_.volume = vol;
+ this.techCall_('setVolume', vol);
+ if (vol > 0) {
+ this.lastVolume_(vol);
+ }
+ return;
+ }
+
+ // Default to 1 when returning current volume.
+ vol = parseFloat(this.techGet_('volume'));
+ return isNaN(vol) ? 1 : vol;
+ }
+
+ /**
+ * Get the current muted state, or turn mute on or off
+ *
+ * @param {boolean} [muted]
+ * - true to mute
+ * - false to unmute
+ *
+ * @return {boolean|undefined}
+ * - true if mute is on and getting
+ * - false if mute is off and getting
+ * - nothing if setting
+ */
+ muted(muted) {
+ if (muted !== undefined) {
+ this.techCall_('setMuted', muted);
+ return;
+ }
+ return this.techGet_('muted') || false;
+ }
+
+ /**
+ * Get the current defaultMuted state, or turn defaultMuted on or off. defaultMuted
+ * indicates the state of muted on initial playback.
+ *
+ * ```js
+ * var myPlayer = videojs('some-player-id');
+ *
+ * myPlayer.src("http://www.example.com/path/to/video.mp4");
+ *
+ * // get, should be false
+ * console.log(myPlayer.defaultMuted());
+ * // set to true
+ * myPlayer.defaultMuted(true);
+ * // get should be true
+ * console.log(myPlayer.defaultMuted());
+ * ```
+ *
+ * @param {boolean} [defaultMuted]
+ * - true to mute
+ * - false to unmute
+ *
+ * @return {boolean|undefined}
+ * - true if defaultMuted is on and getting
+ * - false if defaultMuted is off and getting
+ * - Nothing when setting
+ */
+ defaultMuted(defaultMuted) {
+ if (defaultMuted !== undefined) {
+ this.techCall_('setDefaultMuted', defaultMuted);
+ }
+ return this.techGet_('defaultMuted') || false;
+ }
+
+ /**
+ * Get the last volume, or set it
+ *
+ * @param {number} [percentAsDecimal]
+ * The new last volume as a decimal percent:
+ * - 0 is muted/0%/off
+ * - 1.0 is 100%/full
+ * - 0.5 is half volume or 50%
+ *
+ * @return {number|undefined}
+ * - The current value of lastVolume as a percent when getting
+ * - Nothing when setting
+ *
+ * @private
+ */
+ lastVolume_(percentAsDecimal) {
+ if (percentAsDecimal !== undefined && percentAsDecimal !== 0) {
+ this.cache_.lastVolume = percentAsDecimal;
+ return;
+ }
+ return this.cache_.lastVolume;
+ }
+
+ /**
+ * Check if current tech can support native fullscreen
+ * (e.g. with built in controls like iOS)
+ *
+ * @return {boolean}
+ * if native fullscreen is supported
+ */
+ supportsFullScreen() {
+ return this.techGet_('supportsFullScreen') || false;
+ }
+
+ /**
+ * Check if the player is in fullscreen mode or tell the player that it
+ * is or is not in fullscreen mode.
+ *
+ * > NOTE: As of the latest HTML5 spec, isFullscreen is no longer an official
+ * property and instead document.fullscreenElement is used. But isFullscreen is
+ * still a valuable property for internal player workings.
+ *
+ * @param {boolean} [isFS]
+ * Set the players current fullscreen state
+ *
+ * @return {boolean|undefined}
+ * - true if fullscreen is on and getting
+ * - false if fullscreen is off and getting
+ * - Nothing when setting
+ */
+ isFullscreen(isFS) {
+ if (isFS !== undefined) {
+ const oldValue = this.isFullscreen_;
+ this.isFullscreen_ = Boolean(isFS);
+
+ // if we changed fullscreen state and we're in prefixed mode, trigger fullscreenchange
+ // this is the only place where we trigger fullscreenchange events for older browsers
+ // fullWindow mode is treated as a prefixed event and will get a fullscreenchange event as well
+ if (this.isFullscreen_ !== oldValue && this.fsApi_.prefixed) {
+ /**
+ * @event Player#fullscreenchange
+ * @type {Event}
+ */
+ this.trigger('fullscreenchange');
+ }
+ this.toggleFullscreenClass_();
+ return;
+ }
+ return this.isFullscreen_;
+ }
+
+ /**
+ * Increase the size of the video to full screen
+ * In some browsers, full screen is not supported natively, so it enters
+ * "full window mode", where the video fills the browser window.
+ * In browsers and devices that support native full screen, sometimes the
+ * browser's default controls will be shown, and not the Video.js custom skin.
+ * This includes most mobile devices (iOS, Android) and older versions of
+ * Safari.
+ *
+ * @param {Object} [fullscreenOptions]
+ * Override the player fullscreen options
+ *
+ * @fires Player#fullscreenchange
+ */
+ requestFullscreen(fullscreenOptions) {
+ if (this.isInPictureInPicture()) {
+ this.exitPictureInPicture();
+ }
+ const self = this;
+ return new Promise((resolve, reject) => {
+ function offHandler() {
+ self.off('fullscreenerror', errorHandler);
+ self.off('fullscreenchange', changeHandler);
+ }
+ function changeHandler() {
+ offHandler();
+ resolve();
+ }
+ function errorHandler(e, err) {
+ offHandler();
+ reject(err);
+ }
+ self.one('fullscreenchange', changeHandler);
+ self.one('fullscreenerror', errorHandler);
+ const promise = self.requestFullscreenHelper_(fullscreenOptions);
+ if (promise) {
+ promise.then(offHandler, offHandler);
+ promise.then(resolve, reject);
+ }
+ });
+ }
+ requestFullscreenHelper_(fullscreenOptions) {
+ let fsOptions;
+
+ // Only pass fullscreen options to requestFullscreen in spec-compliant browsers.
+ // Use defaults or player configured option unless passed directly to this method.
+ if (!this.fsApi_.prefixed) {
+ fsOptions = this.options_.fullscreen && this.options_.fullscreen.options || {};
+ if (fullscreenOptions !== undefined) {
+ fsOptions = fullscreenOptions;
+ }
+ }
+
+ // This method works as follows:
+ // 1. if a fullscreen api is available, use it
+ // 1. call requestFullscreen with potential options
+ // 2. if we got a promise from above, use it to update isFullscreen()
+ // 2. otherwise, if the tech supports fullscreen, call `enterFullScreen` on it.
+ // This is particularly used for iPhone, older iPads, and non-safari browser on iOS.
+ // 3. otherwise, use "fullWindow" mode
+ if (this.fsApi_.requestFullscreen) {
+ const promise = this.el_[this.fsApi_.requestFullscreen](fsOptions);
+
+ // Even on browsers with promise support this may not return a promise
+ if (promise) {
+ promise.then(() => this.isFullscreen(true), () => this.isFullscreen(false));
+ }
+ return promise;
+ } else if (this.tech_.supportsFullScreen() && !this.options_.preferFullWindow === true) {
+ // we can't take the video.js controls fullscreen but we can go fullscreen
+ // with native controls
+ this.techCall_('enterFullScreen');
+ } else {
+ // fullscreen isn't supported so we'll just stretch the video element to
+ // fill the viewport
+ this.enterFullWindow();
+ }
+ }
+
+ /**
+ * Return the video to its normal size after having been in full screen mode
+ *
+ * @fires Player#fullscreenchange
+ */
+ exitFullscreen() {
+ const self = this;
+ return new Promise((resolve, reject) => {
+ function offHandler() {
+ self.off('fullscreenerror', errorHandler);
+ self.off('fullscreenchange', changeHandler);
+ }
+ function changeHandler() {
+ offHandler();
+ resolve();
+ }
+ function errorHandler(e, err) {
+ offHandler();
+ reject(err);
+ }
+ self.one('fullscreenchange', changeHandler);
+ self.one('fullscreenerror', errorHandler);
+ const promise = self.exitFullscreenHelper_();
+ if (promise) {
+ promise.then(offHandler, offHandler);
+ // map the promise to our resolve/reject methods
+ promise.then(resolve, reject);
+ }
+ });
+ }
+ exitFullscreenHelper_() {
+ if (this.fsApi_.requestFullscreen) {
+ const promise = document[this.fsApi_.exitFullscreen]();
+
+ // Even on browsers with promise support this may not return a promise
+ if (promise) {
+ // we're splitting the promise here, so, we want to catch the
+ // potential error so that this chain doesn't have unhandled errors
+ silencePromise(promise.then(() => this.isFullscreen(false)));
+ }
+ return promise;
+ } else if (this.tech_.supportsFullScreen() && !this.options_.preferFullWindow === true) {
+ this.techCall_('exitFullScreen');
+ } else {
+ this.exitFullWindow();
+ }
+ }
+
+ /**
+ * When fullscreen isn't supported we can stretch the
+ * video container to as wide as the browser will let us.
+ *
+ * @fires Player#enterFullWindow
+ */
+ enterFullWindow() {
+ this.isFullscreen(true);
+ this.isFullWindow = true;
+
+ // Storing original doc overflow value to return to when fullscreen is off
+ this.docOrigOverflow = document.documentElement.style.overflow;
+
+ // Add listener for esc key to exit fullscreen
+ on(document, 'keydown', this.boundFullWindowOnEscKey_);
+
+ // Hide any scroll bars
+ document.documentElement.style.overflow = 'hidden';
+
+ // Apply fullscreen styles
+ addClass(document.body, 'vjs-full-window');
+
+ /**
+ * @event Player#enterFullWindow
+ * @type {Event}
+ */
+ this.trigger('enterFullWindow');
+ }
+
+ /**
+ * Check for call to either exit full window or
+ * full screen on ESC key
+ *
+ * @param {string} event
+ * Event to check for key press
+ */
+ fullWindowOnEscKey(event) {
+ if (keycode.isEventKey(event, 'Esc')) {
+ if (this.isFullscreen() === true) {
+ if (!this.isFullWindow) {
+ this.exitFullscreen();
+ } else {
+ this.exitFullWindow();
+ }
+ }
+ }
+ }
+
+ /**
+ * Exit full window
+ *
+ * @fires Player#exitFullWindow
+ */
+ exitFullWindow() {
+ this.isFullscreen(false);
+ this.isFullWindow = false;
+ off(document, 'keydown', this.boundFullWindowOnEscKey_);
+
+ // Unhide scroll bars.
+ document.documentElement.style.overflow = this.docOrigOverflow;
+
+ // Remove fullscreen styles
+ removeClass(document.body, 'vjs-full-window');
+
+ // Resize the box, controller, and poster to original sizes
+ // this.positionAll();
+ /**
+ * @event Player#exitFullWindow
+ * @type {Event}
+ */
+ this.trigger('exitFullWindow');
+ }
+
+ /**
+ * Get or set disable Picture-in-Picture mode.
+ *
+ * @param {boolean} [value]
+ * - true will disable Picture-in-Picture mode
+ * - false will enable Picture-in-Picture mode
+ */
+ disablePictureInPicture(value) {
+ if (value === undefined) {
+ return this.techGet_('disablePictureInPicture');
+ }
+ this.techCall_('setDisablePictureInPicture', value);
+ this.options_.disablePictureInPicture = value;
+ this.trigger('disablepictureinpicturechanged');
+ }
+
+ /**
+ * Check if the player is in Picture-in-Picture mode or tell the player that it
+ * is or is not in Picture-in-Picture mode.
+ *
+ * @param {boolean} [isPiP]
+ * Set the players current Picture-in-Picture state
+ *
+ * @return {boolean|undefined}
+ * - true if Picture-in-Picture is on and getting
+ * - false if Picture-in-Picture is off and getting
+ * - nothing if setting
+ */
+ isInPictureInPicture(isPiP) {
+ if (isPiP !== undefined) {
+ this.isInPictureInPicture_ = !!isPiP;
+ this.togglePictureInPictureClass_();
+ return;
+ }
+ return !!this.isInPictureInPicture_;
+ }
+
+ /**
+ * Create a floating video window always on top of other windows so that users may
+ * continue consuming media while they interact with other content sites, or
+ * applications on their device.
+ *
+ * This can use document picture-in-picture or element picture in picture
+ *
+ * Set `enableDocumentPictureInPicture` to `true` to use docPiP on a supported browser
+ * Else set `disablePictureInPicture` to `false` to disable elPiP on a supported browser
+ *
+ *
+ * @see [Spec]{@link https://w3c.github.io/picture-in-picture/}
+ * @see [Spec]{@link https://wicg.github.io/document-picture-in-picture/}
+ *
+ * @fires Player#enterpictureinpicture
+ *
+ * @return {Promise}
+ * A promise with a Picture-in-Picture window.
+ */
+ requestPictureInPicture() {
+ if (this.options_.enableDocumentPictureInPicture && window.documentPictureInPicture) {
+ const pipContainer = document.createElement(this.el().tagName);
+ pipContainer.classList = this.el().classList;
+ pipContainer.classList.add('vjs-pip-container');
+ if (this.posterImage) {
+ pipContainer.appendChild(this.posterImage.el().cloneNode(true));
+ }
+ if (this.titleBar) {
+ pipContainer.appendChild(this.titleBar.el().cloneNode(true));
+ }
+ pipContainer.appendChild(createEl('p', {
+ className: 'vjs-pip-text'
+ }, {}, this.localize('Playing in picture-in-picture')));
+ return window.documentPictureInPicture.requestWindow({
+ // The aspect ratio won't be correct, Chrome bug https://crbug.com/1407629
+ width: this.videoWidth(),
+ height: this.videoHeight()
+ }).then(pipWindow => {
+ copyStyleSheetsToWindow(pipWindow);
+ this.el_.parentNode.insertBefore(pipContainer, this.el_);
+ pipWindow.document.body.appendChild(this.el_);
+ pipWindow.document.body.classList.add('vjs-pip-window');
+ this.player_.isInPictureInPicture(true);
+ this.player_.trigger({
+ type: 'enterpictureinpicture',
+ pipWindow
+ });
+
+ // Listen for the PiP closing event to move the video back.
+ pipWindow.addEventListener('pagehide', event => {
+ const pipVideo = event.target.querySelector('.video-js');
+ pipContainer.parentNode.replaceChild(pipVideo, pipContainer);
+ this.player_.isInPictureInPicture(false);
+ this.player_.trigger('leavepictureinpicture');
+ });
+ return pipWindow;
+ });
+ }
+ if ('pictureInPictureEnabled' in document && this.disablePictureInPicture() === false) {
+ /**
+ * This event fires when the player enters picture in picture mode
+ *
+ * @event Player#enterpictureinpicture
+ * @type {Event}
+ */
+ return this.techGet_('requestPictureInPicture');
+ }
+ return Promise.reject('No PiP mode is available');
+ }
+
+ /**
+ * Exit Picture-in-Picture mode.
+ *
+ * @see [Spec]{@link https://wicg.github.io/picture-in-picture}
+ *
+ * @fires Player#leavepictureinpicture
+ *
+ * @return {Promise}
+ * A promise.
+ */
+ exitPictureInPicture() {
+ if (window.documentPictureInPicture && window.documentPictureInPicture.window) {
+ // With documentPictureInPicture, Player#leavepictureinpicture is fired in the pagehide handler
+ window.documentPictureInPicture.window.close();
+ return Promise.resolve();
+ }
+ if ('pictureInPictureEnabled' in document) {
+ /**
+ * This event fires when the player leaves picture in picture mode
+ *
+ * @event Player#leavepictureinpicture
+ * @type {Event}
+ */
+ return document.exitPictureInPicture();
+ }
+ }
+
+ /**
+ * Called when this Player has focus and a key gets pressed down, or when
+ * any Component of this player receives a key press that it doesn't handle.
+ * This allows player-wide hotkeys (either as defined below, or optionally
+ * by an external function).
+ *
+ * @param {KeyboardEvent} event
+ * The `keydown` event that caused this function to be called.
+ *
+ * @listens keydown
+ */
+ handleKeyDown(event) {
+ const {
+ userActions
+ } = this.options_;
+
+ // Bail out if hotkeys are not configured.
+ if (!userActions || !userActions.hotkeys) {
+ return;
+ }
+
+ // Function that determines whether or not to exclude an element from
+ // hotkeys handling.
+ const excludeElement = el => {
+ const tagName = el.tagName.toLowerCase();
+
+ // The first and easiest test is for `contenteditable` elements.
+ if (el.isContentEditable) {
+ return true;
+ }
+
+ // Inputs matching these types will still trigger hotkey handling as
+ // they are not text inputs.
+ const allowedInputTypes = ['button', 'checkbox', 'hidden', 'radio', 'reset', 'submit'];
+ if (tagName === 'input') {
+ return allowedInputTypes.indexOf(el.type) === -1;
+ }
+
+ // The final test is by tag name. These tags will be excluded entirely.
+ const excludedTags = ['textarea'];
+ return excludedTags.indexOf(tagName) !== -1;
+ };
+
+ // Bail out if the user is focused on an interactive form element.
+ if (excludeElement(this.el_.ownerDocument.activeElement)) {
+ return;
+ }
+ if (typeof userActions.hotkeys === 'function') {
+ userActions.hotkeys.call(this, event);
+ } else {
+ this.handleHotkeys(event);
+ }
+ }
+
+ /**
+ * Called when this Player receives a hotkey keydown event.
+ * Supported player-wide hotkeys are:
+ *
+ * f - toggle fullscreen
+ * m - toggle mute
+ * k or Space - toggle play/pause
+ *
+ * @param {Event} event
+ * The `keydown` event that caused this function to be called.
+ */
+ handleHotkeys(event) {
+ const hotkeys = this.options_.userActions ? this.options_.userActions.hotkeys : {};
+
+ // set fullscreenKey, muteKey, playPauseKey from `hotkeys`, use defaults if not set
+ const {
+ fullscreenKey = keydownEvent => keycode.isEventKey(keydownEvent, 'f'),
+ muteKey = keydownEvent => keycode.isEventKey(keydownEvent, 'm'),
+ playPauseKey = keydownEvent => keycode.isEventKey(keydownEvent, 'k') || keycode.isEventKey(keydownEvent, 'Space')
+ } = hotkeys;
+ if (fullscreenKey.call(this, event)) {
+ event.preventDefault();
+ event.stopPropagation();
+ const FSToggle = Component$1.getComponent('FullscreenToggle');
+ if (document[this.fsApi_.fullscreenEnabled] !== false) {
+ FSToggle.prototype.handleClick.call(this, event);
+ }
+ } else if (muteKey.call(this, event)) {
+ event.preventDefault();
+ event.stopPropagation();
+ const MuteToggle = Component$1.getComponent('MuteToggle');
+ MuteToggle.prototype.handleClick.call(this, event);
+ } else if (playPauseKey.call(this, event)) {
+ event.preventDefault();
+ event.stopPropagation();
+ const PlayToggle = Component$1.getComponent('PlayToggle');
+ PlayToggle.prototype.handleClick.call(this, event);
+ }
+ }
+
+ /**
+ * Check whether the player can play a given mimetype
+ *
+ * @see https://www.w3.org/TR/2011/WD-html5-20110113/video.html#dom-navigator-canplaytype
+ *
+ * @param {string} type
+ * The mimetype to check
+ *
+ * @return {string}
+ * 'probably', 'maybe', or '' (empty string)
+ */
+ canPlayType(type) {
+ let can;
+
+ // Loop through each playback technology in the options order
+ for (let i = 0, j = this.options_.techOrder; i < j.length; i++) {
+ const techName = j[i];
+ let tech = Tech.getTech(techName);
+
+ // Support old behavior of techs being registered as components.
+ // Remove once that deprecated behavior is removed.
+ if (!tech) {
+ tech = Component$1.getComponent(techName);
+ }
+
+ // Check if the current tech is defined before continuing
+ if (!tech) {
+ log$1.error(`The "${techName}" tech is undefined. Skipped browser support check for that tech.`);
+ continue;
+ }
+
+ // Check if the browser supports this technology
+ if (tech.isSupported()) {
+ can = tech.canPlayType(type);
+ if (can) {
+ return can;
+ }
+ }
+ }
+ return '';
+ }
+
+ /**
+ * Select source based on tech-order or source-order
+ * Uses source-order selection if `options.sourceOrder` is truthy. Otherwise,
+ * defaults to tech-order selection
+ *
+ * @param {Array} sources
+ * The sources for a media asset
+ *
+ * @return {Object|boolean}
+ * Object of source and tech order or false
+ */
+ selectSource(sources) {
+ // Get only the techs specified in `techOrder` that exist and are supported by the
+ // current platform
+ const techs = this.options_.techOrder.map(techName => {
+ return [techName, Tech.getTech(techName)];
+ }).filter(([techName, tech]) => {
+ // Check if the current tech is defined before continuing
+ if (tech) {
+ // Check if the browser supports this technology
+ return tech.isSupported();
+ }
+ log$1.error(`The "${techName}" tech is undefined. Skipped browser support check for that tech.`);
+ return false;
+ });
+
+ // Iterate over each `innerArray` element once per `outerArray` element and execute
+ // `tester` with both. If `tester` returns a non-falsy value, exit early and return
+ // that value.
+ const findFirstPassingTechSourcePair = function (outerArray, innerArray, tester) {
+ let found;
+ outerArray.some(outerChoice => {
+ return innerArray.some(innerChoice => {
+ found = tester(outerChoice, innerChoice);
+ if (found) {
+ return true;
+ }
+ });
+ });
+ return found;
+ };
+ let foundSourceAndTech;
+ const flip = fn => (a, b) => fn(b, a);
+ const finder = ([techName, tech], source) => {
+ if (tech.canPlaySource(source, this.options_[techName.toLowerCase()])) {
+ return {
+ source,
+ tech: techName
+ };
+ }
+ };
+
+ // Depending on the truthiness of `options.sourceOrder`, we swap the order of techs and sources
+ // to select from them based on their priority.
+ if (this.options_.sourceOrder) {
+ // Source-first ordering
+ foundSourceAndTech = findFirstPassingTechSourcePair(sources, techs, flip(finder));
+ } else {
+ // Tech-first ordering
+ foundSourceAndTech = findFirstPassingTechSourcePair(techs, sources, finder);
+ }
+ return foundSourceAndTech || false;
+ }
+
+ /**
+ * Executes source setting and getting logic
+ *
+ * @param {Tech~SourceObject|Tech~SourceObject[]|string} [source]
+ * A SourceObject, an array of SourceObjects, or a string referencing
+ * a URL to a media source. It is _highly recommended_ that an object
+ * or array of objects is used here, so that source selection
+ * algorithms can take the `type` into account.
+ *
+ * If not provided, this method acts as a getter.
+ * @param {boolean} [isRetry]
+ * Indicates whether this is being called internally as a result of a retry
+ *
+ * @return {string|undefined}
+ * If the `source` argument is missing, returns the current source
+ * URL. Otherwise, returns nothing/undefined.
+ */
+ handleSrc_(source, isRetry) {
+ // getter usage
+ if (typeof source === 'undefined') {
+ return this.cache_.src || '';
+ }
+
+ // Reset retry behavior for new source
+ if (this.resetRetryOnError_) {
+ this.resetRetryOnError_();
+ }
+
+ // filter out invalid sources and turn our source into
+ // an array of source objects
+ const sources = filterSource(source);
+
+ // if a source was passed in then it is invalid because
+ // it was filtered to a zero length Array. So we have to
+ // show an error
+ if (!sources.length) {
+ this.setTimeout(function () {
+ this.error({
+ code: 4,
+ message: this.options_.notSupportedMessage
+ });
+ }, 0);
+ return;
+ }
+
+ // initial sources
+ this.changingSrc_ = true;
+
+ // Only update the cached source list if we are not retrying a new source after error,
+ // since in that case we want to include the failed source(s) in the cache
+ if (!isRetry) {
+ this.cache_.sources = sources;
+ }
+ this.updateSourceCaches_(sources[0]);
+
+ // middlewareSource is the source after it has been changed by middleware
+ setSource(this, sources[0], (middlewareSource, mws) => {
+ this.middleware_ = mws;
+
+ // since sourceSet is async we have to update the cache again after we select a source since
+ // the source that is selected could be out of order from the cache update above this callback.
+ if (!isRetry) {
+ this.cache_.sources = sources;
+ }
+ this.updateSourceCaches_(middlewareSource);
+ const err = this.src_(middlewareSource);
+ if (err) {
+ if (sources.length > 1) {
+ return this.handleSrc_(sources.slice(1));
+ }
+ this.changingSrc_ = false;
+
+ // We need to wrap this in a timeout to give folks a chance to add error event handlers
+ this.setTimeout(function () {
+ this.error({
+ code: 4,
+ message: this.options_.notSupportedMessage
+ });
+ }, 0);
+
+ // we could not find an appropriate tech, but let's still notify the delegate that this is it
+ // this needs a better comment about why this is needed
+ this.triggerReady();
+ return;
+ }
+ setTech(mws, this.tech_);
+ });
+
+ // Try another available source if this one fails before playback.
+ if (sources.length > 1) {
+ const retry = () => {
+ // Remove the error modal
+ this.error(null);
+ this.handleSrc_(sources.slice(1), true);
+ };
+ const stopListeningForErrors = () => {
+ this.off('error', retry);
+ };
+ this.one('error', retry);
+ this.one('playing', stopListeningForErrors);
+ this.resetRetryOnError_ = () => {
+ this.off('error', retry);
+ this.off('playing', stopListeningForErrors);
+ };
+ }
+ }
+
+ /**
+ * Get or set the video source.
+ *
+ * @param {Tech~SourceObject|Tech~SourceObject[]|string} [source]
+ * A SourceObject, an array of SourceObjects, or a string referencing
+ * a URL to a media source. It is _highly recommended_ that an object
+ * or array of objects is used here, so that source selection
+ * algorithms can take the `type` into account.
+ *
+ * If not provided, this method acts as a getter.
+ *
+ * @return {string|undefined}
+ * If the `source` argument is missing, returns the current source
+ * URL. Otherwise, returns nothing/undefined.
+ */
+ src(source) {
+ return this.handleSrc_(source, false);
+ }
+
+ /**
+ * Set the source object on the tech, returns a boolean that indicates whether
+ * there is a tech that can play the source or not
+ *
+ * @param {Tech~SourceObject} source
+ * The source object to set on the Tech
+ *
+ * @return {boolean}
+ * - True if there is no Tech to playback this source
+ * - False otherwise
+ *
+ * @private
+ */
+ src_(source) {
+ const sourceTech = this.selectSource([source]);
+ if (!sourceTech) {
+ return true;
+ }
+ if (!titleCaseEquals(sourceTech.tech, this.techName_)) {
+ this.changingSrc_ = true;
+ // load this technology with the chosen source
+ this.loadTech_(sourceTech.tech, sourceTech.source);
+ this.tech_.ready(() => {
+ this.changingSrc_ = false;
+ });
+ return false;
+ }
+
+ // wait until the tech is ready to set the source
+ // and set it synchronously if possible (#2326)
+ this.ready(function () {
+ // The setSource tech method was added with source handlers
+ // so older techs won't support it
+ // We need to check the direct prototype for the case where subclasses
+ // of the tech do not support source handlers
+ if (this.tech_.constructor.prototype.hasOwnProperty('setSource')) {
+ this.techCall_('setSource', source);
+ } else {
+ this.techCall_('src', source.src);
+ }
+ this.changingSrc_ = false;
+ }, true);
+ return false;
+ }
+
+ /**
+ * Begin loading the src data.
+ */
+ load() {
+ // Workaround to use the load method with the VHS.
+ // Does not cover the case when the load method is called directly from the mediaElement.
+ if (this.tech_ && this.tech_.vhs) {
+ this.src(this.currentSource());
+ return;
+ }
+ this.techCall_('load');
+ }
+
+ /**
+ * Reset the player. Loads the first tech in the techOrder,
+ * removes all the text tracks in the existing `tech`,
+ * and calls `reset` on the `tech`.
+ */
+ reset() {
+ if (this.paused()) {
+ this.doReset_();
+ } else {
+ const playPromise = this.play();
+ silencePromise(playPromise.then(() => this.doReset_()));
+ }
+ }
+ doReset_() {
+ if (this.tech_) {
+ this.tech_.clearTracks('text');
+ }
+ this.removeClass('vjs-playing');
+ this.addClass('vjs-paused');
+ this.resetCache_();
+ this.poster('');
+ this.loadTech_(this.options_.techOrder[0], null);
+ this.techCall_('reset');
+ this.resetControlBarUI_();
+ this.error(null);
+ if (this.titleBar) {
+ this.titleBar.update({
+ title: undefined,
+ description: undefined
+ });
+ }
+ if (isEvented(this)) {
+ this.trigger('playerreset');
+ }
+ }
+
+ /**
+ * Reset Control Bar's UI by calling sub-methods that reset
+ * all of Control Bar's components
+ */
+ resetControlBarUI_() {
+ this.resetProgressBar_();
+ this.resetPlaybackRate_();
+ this.resetVolumeBar_();
+ }
+
+ /**
+ * Reset tech's progress so progress bar is reset in the UI
+ */
+ resetProgressBar_() {
+ this.currentTime(0);
+ const {
+ currentTimeDisplay,
+ durationDisplay,
+ progressControl,
+ remainingTimeDisplay
+ } = this.controlBar || {};
+ const {
+ seekBar
+ } = progressControl || {};
+ if (currentTimeDisplay) {
+ currentTimeDisplay.updateContent();
+ }
+ if (durationDisplay) {
+ durationDisplay.updateContent();
+ }
+ if (remainingTimeDisplay) {
+ remainingTimeDisplay.updateContent();
+ }
+ if (seekBar) {
+ seekBar.update();
+ if (seekBar.loadProgressBar) {
+ seekBar.loadProgressBar.update();
+ }
+ }
+ }
+
+ /**
+ * Reset Playback ratio
+ */
+ resetPlaybackRate_() {
+ this.playbackRate(this.defaultPlaybackRate());
+ this.handleTechRateChange_();
+ }
+
+ /**
+ * Reset Volume bar
+ */
+ resetVolumeBar_() {
+ this.volume(1.0);
+ this.trigger('volumechange');
+ }
+
+ /**
+ * Returns all of the current source objects.
+ *
+ * @return {Tech~SourceObject[]}
+ * The current source objects
+ */
+ currentSources() {
+ const source = this.currentSource();
+ const sources = [];
+
+ // assume `{}` or `{ src }`
+ if (Object.keys(source).length !== 0) {
+ sources.push(source);
+ }
+ return this.cache_.sources || sources;
+ }
+
+ /**
+ * Returns the current source object.
+ *
+ * @return {Tech~SourceObject}
+ * The current source object
+ */
+ currentSource() {
+ return this.cache_.source || {};
+ }
+
+ /**
+ * Returns the fully qualified URL of the current source value e.g. http://mysite.com/video.mp4
+ * Can be used in conjunction with `currentType` to assist in rebuilding the current source object.
+ *
+ * @return {string}
+ * The current source
+ */
+ currentSrc() {
+ return this.currentSource() && this.currentSource().src || '';
+ }
+
+ /**
+ * Get the current source type e.g. video/mp4
+ * This can allow you rebuild the current source object so that you could load the same
+ * source and tech later
+ *
+ * @return {string}
+ * The source MIME type
+ */
+ currentType() {
+ return this.currentSource() && this.currentSource().type || '';
+ }
+
+ /**
+ * Get or set the preload attribute
+ *
+ * @param {'none'|'auto'|'metadata'} [value]
+ * Preload mode to pass to tech
+ *
+ * @return {string|undefined}
+ * - The preload attribute value when getting
+ * - Nothing when setting
+ */
+ preload(value) {
+ if (value !== undefined) {
+ this.techCall_('setPreload', value);
+ this.options_.preload = value;
+ return;
+ }
+ return this.techGet_('preload');
+ }
+
+ /**
+ * Get or set the autoplay option. When this is a boolean it will
+ * modify the attribute on the tech. When this is a string the attribute on
+ * the tech will be removed and `Player` will handle autoplay on loadstarts.
+ *
+ * @param {boolean|'play'|'muted'|'any'} [value]
+ * - true: autoplay using the browser behavior
+ * - false: do not autoplay
+ * - 'play': call play() on every loadstart
+ * - 'muted': call muted() then play() on every loadstart
+ * - 'any': call play() on every loadstart. if that fails call muted() then play().
+ * - *: values other than those listed here will be set `autoplay` to true
+ *
+ * @return {boolean|string|undefined}
+ * - The current value of autoplay when getting
+ * - Nothing when setting
+ */
+ autoplay(value) {
+ // getter usage
+ if (value === undefined) {
+ return this.options_.autoplay || false;
+ }
+ let techAutoplay;
+
+ // if the value is a valid string set it to that, or normalize `true` to 'play', if need be
+ if (typeof value === 'string' && /(any|play|muted)/.test(value) || value === true && this.options_.normalizeAutoplay) {
+ this.options_.autoplay = value;
+ this.manualAutoplay_(typeof value === 'string' ? value : 'play');
+ techAutoplay = false;
+
+ // any falsy value sets autoplay to false in the browser,
+ // lets do the same
+ } else if (!value) {
+ this.options_.autoplay = false;
+
+ // any other value (ie truthy) sets autoplay to true
+ } else {
+ this.options_.autoplay = true;
+ }
+ techAutoplay = typeof techAutoplay === 'undefined' ? this.options_.autoplay : techAutoplay;
+
+ // if we don't have a tech then we do not queue up
+ // a setAutoplay call on tech ready. We do this because the
+ // autoplay option will be passed in the constructor and we
+ // do not need to set it twice
+ if (this.tech_) {
+ this.techCall_('setAutoplay', techAutoplay);
+ }
+ }
+
+ /**
+ * Set or unset the playsinline attribute.
+ * Playsinline tells the browser that non-fullscreen playback is preferred.
+ *
+ * @param {boolean} [value]
+ * - true means that we should try to play inline by default
+ * - false means that we should use the browser's default playback mode,
+ * which in most cases is inline. iOS Safari is a notable exception
+ * and plays fullscreen by default.
+ *
+ * @return {string|undefined}
+ * - the current value of playsinline
+ * - Nothing when setting
+ *
+ * @see [Spec]{@link https://html.spec.whatwg.org/#attr-video-playsinline}
+ */
+ playsinline(value) {
+ if (value !== undefined) {
+ this.techCall_('setPlaysinline', value);
+ this.options_.playsinline = value;
+ }
+ return this.techGet_('playsinline');
+ }
+
+ /**
+ * Get or set the loop attribute on the video element.
+ *
+ * @param {boolean} [value]
+ * - true means that we should loop the video
+ * - false means that we should not loop the video
+ *
+ * @return {boolean|undefined}
+ * - The current value of loop when getting
+ * - Nothing when setting
+ */
+ loop(value) {
+ if (value !== undefined) {
+ this.techCall_('setLoop', value);
+ this.options_.loop = value;
+ return;
+ }
+ return this.techGet_('loop');
+ }
+
+ /**
+ * Get or set the poster image source url
+ *
+ * @fires Player#posterchange
+ *
+ * @param {string} [src]
+ * Poster image source URL
+ *
+ * @return {string|undefined}
+ * - The current value of poster when getting
+ * - Nothing when setting
+ */
+ poster(src) {
+ if (src === undefined) {
+ return this.poster_;
+ }
+
+ // The correct way to remove a poster is to set as an empty string
+ // other falsey values will throw errors
+ if (!src) {
+ src = '';
+ }
+ if (src === this.poster_) {
+ return;
+ }
+
+ // update the internal poster variable
+ this.poster_ = src;
+
+ // update the tech's poster
+ this.techCall_('setPoster', src);
+ this.isPosterFromTech_ = false;
+
+ // alert components that the poster has been set
+ /**
+ * This event fires when the poster image is changed on the player.
+ *
+ * @event Player#posterchange
+ * @type {Event}
+ */
+ this.trigger('posterchange');
+ }
+
+ /**
+ * Some techs (e.g. YouTube) can provide a poster source in an
+ * asynchronous way. We want the poster component to use this
+ * poster source so that it covers up the tech's controls.
+ * (YouTube's play button). However we only want to use this
+ * source if the player user hasn't set a poster through
+ * the normal APIs.
+ *
+ * @fires Player#posterchange
+ * @listens Tech#posterchange
+ * @private
+ */
+ handleTechPosterChange_() {
+ if ((!this.poster_ || this.options_.techCanOverridePoster) && this.tech_ && this.tech_.poster) {
+ const newPoster = this.tech_.poster() || '';
+ if (newPoster !== this.poster_) {
+ this.poster_ = newPoster;
+ this.isPosterFromTech_ = true;
+
+ // Let components know the poster has changed
+ this.trigger('posterchange');
+ }
+ }
+ }
+
+ /**
+ * Get or set whether or not the controls are showing.
+ *
+ * @fires Player#controlsenabled
+ *
+ * @param {boolean} [bool]
+ * - true to turn controls on
+ * - false to turn controls off
+ *
+ * @return {boolean|undefined}
+ * - The current value of controls when getting
+ * - Nothing when setting
+ */
+ controls(bool) {
+ if (bool === undefined) {
+ return !!this.controls_;
+ }
+ bool = !!bool;
+
+ // Don't trigger a change event unless it actually changed
+ if (this.controls_ === bool) {
+ return;
+ }
+ this.controls_ = bool;
+ if (this.usingNativeControls()) {
+ this.techCall_('setControls', bool);
+ }
+ if (this.controls_) {
+ this.removeClass('vjs-controls-disabled');
+ this.addClass('vjs-controls-enabled');
+ /**
+ * @event Player#controlsenabled
+ * @type {Event}
+ */
+ this.trigger('controlsenabled');
+ if (!this.usingNativeControls()) {
+ this.addTechControlsListeners_();
+ }
+ } else {
+ this.removeClass('vjs-controls-enabled');
+ this.addClass('vjs-controls-disabled');
+ /**
+ * @event Player#controlsdisabled
+ * @type {Event}
+ */
+ this.trigger('controlsdisabled');
+ if (!this.usingNativeControls()) {
+ this.removeTechControlsListeners_();
+ }
+ }
+ }
+
+ /**
+ * Toggle native controls on/off. Native controls are the controls built into
+ * devices (e.g. default iPhone controls) or other techs
+ * (e.g. Vimeo Controls)
+ * **This should only be set by the current tech, because only the tech knows
+ * if it can support native controls**
+ *
+ * @fires Player#usingnativecontrols
+ * @fires Player#usingcustomcontrols
+ *
+ * @param {boolean} [bool]
+ * - true to turn native controls on
+ * - false to turn native controls off
+ *
+ * @return {boolean|undefined}
+ * - The current value of native controls when getting
+ * - Nothing when setting
+ */
+ usingNativeControls(bool) {
+ if (bool === undefined) {
+ return !!this.usingNativeControls_;
+ }
+ bool = !!bool;
+
+ // Don't trigger a change event unless it actually changed
+ if (this.usingNativeControls_ === bool) {
+ return;
+ }
+ this.usingNativeControls_ = bool;
+ if (this.usingNativeControls_) {
+ this.addClass('vjs-using-native-controls');
+
+ /**
+ * player is using the native device controls
+ *
+ * @event Player#usingnativecontrols
+ * @type {Event}
+ */
+ this.trigger('usingnativecontrols');
+ } else {
+ this.removeClass('vjs-using-native-controls');
+
+ /**
+ * player is using the custom HTML controls
+ *
+ * @event Player#usingcustomcontrols
+ * @type {Event}
+ */
+ this.trigger('usingcustomcontrols');
+ }
+ }
+
+ /**
+ * Set or get the current MediaError
+ *
+ * @fires Player#error
+ *
+ * @param {MediaError|string|number} [err]
+ * A MediaError or a string/number to be turned
+ * into a MediaError
+ *
+ * @return {MediaError|null|undefined}
+ * - The current MediaError when getting (or null)
+ * - Nothing when setting
+ */
+ error(err) {
+ if (err === undefined) {
+ return this.error_ || null;
+ }
+
+ // allow hooks to modify error object
+ hooks('beforeerror').forEach(hookFunction => {
+ const newErr = hookFunction(this, err);
+ if (!(isObject$1(newErr) && !Array.isArray(newErr) || typeof newErr === 'string' || typeof newErr === 'number' || newErr === null)) {
+ this.log.error('please return a value that MediaError expects in beforeerror hooks');
+ return;
+ }
+ err = newErr;
+ });
+
+ // Suppress the first error message for no compatible source until
+ // user interaction
+ if (this.options_.suppressNotSupportedError && err && err.code === 4) {
+ const triggerSuppressedError = function () {
+ this.error(err);
+ };
+ this.options_.suppressNotSupportedError = false;
+ this.any(['click', 'touchstart'], triggerSuppressedError);
+ this.one('loadstart', function () {
+ this.off(['click', 'touchstart'], triggerSuppressedError);
+ });
+ return;
+ }
+
+ // restoring to default
+ if (err === null) {
+ this.error_ = null;
+ this.removeClass('vjs-error');
+ if (this.errorDisplay) {
+ this.errorDisplay.close();
+ }
+ return;
+ }
+ this.error_ = new MediaError(err);
+
+ // add the vjs-error classname to the player
+ this.addClass('vjs-error');
+
+ // log the name of the error type and any message
+ // IE11 logs "[object object]" and required you to expand message to see error object
+ log$1.error(`(CODE:${this.error_.code} ${MediaError.errorTypes[this.error_.code]})`, this.error_.message, this.error_);
+
+ /**
+ * @event Player#error
+ * @type {Event}
+ */
+ this.trigger('error');
+
+ // notify hooks of the per player error
+ hooks('error').forEach(hookFunction => hookFunction(this, this.error_));
+ return;
+ }
+
+ /**
+ * Report user activity
+ *
+ * @param {Object} event
+ * Event object
+ */
+ reportUserActivity(event) {
+ this.userActivity_ = true;
+ }
+
+ /**
+ * Get/set if user is active
+ *
+ * @fires Player#useractive
+ * @fires Player#userinactive
+ *
+ * @param {boolean} [bool]
+ * - true if the user is active
+ * - false if the user is inactive
+ *
+ * @return {boolean|undefined}
+ * - The current value of userActive when getting
+ * - Nothing when setting
+ */
+ userActive(bool) {
+ if (bool === undefined) {
+ return this.userActive_;
+ }
+ bool = !!bool;
+ if (bool === this.userActive_) {
+ return;
+ }
+ this.userActive_ = bool;
+ if (this.userActive_) {
+ this.userActivity_ = true;
+ this.removeClass('vjs-user-inactive');
+ this.addClass('vjs-user-active');
+ /**
+ * @event Player#useractive
+ * @type {Event}
+ */
+ this.trigger('useractive');
+ return;
+ }
+
+ // Chrome/Safari/IE have bugs where when you change the cursor it can
+ // trigger a mousemove event. This causes an issue when you're hiding
+ // the cursor when the user is inactive, and a mousemove signals user
+ // activity. Making it impossible to go into inactive mode. Specifically
+ // this happens in fullscreen when we really need to hide the cursor.
+ //
+ // When this gets resolved in ALL browsers it can be removed
+ // https://code.google.com/p/chromium/issues/detail?id=103041
+ if (this.tech_) {
+ this.tech_.one('mousemove', function (e) {
+ e.stopPropagation();
+ e.preventDefault();
+ });
+ }
+ this.userActivity_ = false;
+ this.removeClass('vjs-user-active');
+ this.addClass('vjs-user-inactive');
+ /**
+ * @event Player#userinactive
+ * @type {Event}
+ */
+ this.trigger('userinactive');
+ }
+
+ /**
+ * Listen for user activity based on timeout value
+ *
+ * @private
+ */
+ listenForUserActivity_() {
+ let mouseInProgress;
+ let lastMoveX;
+ let lastMoveY;
+ const handleActivity = bind_(this, this.reportUserActivity);
+ const handleMouseMove = function (e) {
+ // #1068 - Prevent mousemove spamming
+ // Chrome Bug: https://code.google.com/p/chromium/issues/detail?id=366970
+ if (e.screenX !== lastMoveX || e.screenY !== lastMoveY) {
+ lastMoveX = e.screenX;
+ lastMoveY = e.screenY;
+ handleActivity();
+ }
+ };
+ const handleMouseDown = function () {
+ handleActivity();
+ // For as long as the they are touching the device or have their mouse down,
+ // we consider them active even if they're not moving their finger or mouse.
+ // So we want to continue to update that they are active
+ this.clearInterval(mouseInProgress);
+ // Setting userActivity=true now and setting the interval to the same time
+ // as the activityCheck interval (250) should ensure we never miss the
+ // next activityCheck
+ mouseInProgress = this.setInterval(handleActivity, 250);
+ };
+ const handleMouseUpAndMouseLeave = function (event) {
+ handleActivity();
+ // Stop the interval that maintains activity if the mouse/touch is down
+ this.clearInterval(mouseInProgress);
+ };
+
+ // Any mouse movement will be considered user activity
+ this.on('mousedown', handleMouseDown);
+ this.on('mousemove', handleMouseMove);
+ this.on('mouseup', handleMouseUpAndMouseLeave);
+ this.on('mouseleave', handleMouseUpAndMouseLeave);
+ const controlBar = this.getChild('controlBar');
+
+ // Fixes bug on Android & iOS where when tapping progressBar (when control bar is displayed)
+ // controlBar would no longer be hidden by default timeout.
+ if (controlBar && !IS_IOS && !IS_ANDROID) {
+ controlBar.on('mouseenter', function (event) {
+ if (this.player().options_.inactivityTimeout !== 0) {
+ this.player().cache_.inactivityTimeout = this.player().options_.inactivityTimeout;
+ }
+ this.player().options_.inactivityTimeout = 0;
+ });
+ controlBar.on('mouseleave', function (event) {
+ this.player().options_.inactivityTimeout = this.player().cache_.inactivityTimeout;
+ });
+ }
+
+ // Listen for keyboard navigation
+ // Shouldn't need to use inProgress interval because of key repeat
+ this.on('keydown', handleActivity);
+ this.on('keyup', handleActivity);
+
+ // Run an interval every 250 milliseconds instead of stuffing everything into
+ // the mousemove/touchmove function itself, to prevent performance degradation.
+ // `this.reportUserActivity` simply sets this.userActivity_ to true, which
+ // then gets picked up by this loop
+ // http://ejohn.org/blog/learning-from-twitter/
+ let inactivityTimeout;
+
+ /** @this Player */
+ const activityCheck = function () {
+ // Check to see if mouse/touch activity has happened
+ if (!this.userActivity_) {
+ return;
+ }
+
+ // Reset the activity tracker
+ this.userActivity_ = false;
+
+ // If the user state was inactive, set the state to active
+ this.userActive(true);
+
+ // Clear any existing inactivity timeout to start the timer over
+ this.clearTimeout(inactivityTimeout);
+ const timeout = this.options_.inactivityTimeout;
+ if (timeout <= 0) {
+ return;
+ }
+
+ // In <timeout> milliseconds, if no more activity has occurred the
+ // user will be considered inactive
+ inactivityTimeout = this.setTimeout(function () {
+ // Protect against the case where the inactivityTimeout can trigger just
+ // before the next user activity is picked up by the activity check loop
+ // causing a flicker
+ if (!this.userActivity_) {
+ this.userActive(false);
+ }
+ }, timeout);
+ };
+ this.setInterval(activityCheck, 250);
+ }
+
+ /**
+ * Gets or sets the current playback rate. A playback rate of
+ * 1.0 represents normal speed and 0.5 would indicate half-speed
+ * playback, for instance.
+ *
+ * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-media-playbackrate
+ *
+ * @param {number} [rate]
+ * New playback rate to set.
+ *
+ * @return {number|undefined}
+ * - The current playback rate when getting or 1.0
+ * - Nothing when setting
+ */
+ playbackRate(rate) {
+ if (rate !== undefined) {
+ // NOTE: this.cache_.lastPlaybackRate is set from the tech handler
+ // that is registered above
+ this.techCall_('setPlaybackRate', rate);
+ return;
+ }
+ if (this.tech_ && this.tech_.featuresPlaybackRate) {
+ return this.cache_.lastPlaybackRate || this.techGet_('playbackRate');
+ }
+ return 1.0;
+ }
+
+ /**
+ * Gets or sets the current default playback rate. A default playback rate of
+ * 1.0 represents normal speed and 0.5 would indicate half-speed playback, for instance.
+ * defaultPlaybackRate will only represent what the initial playbackRate of a video was, not
+ * not the current playbackRate.
+ *
+ * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-media-defaultplaybackrate
+ *
+ * @param {number} [rate]
+ * New default playback rate to set.
+ *
+ * @return {number|undefined}
+ * - The default playback rate when getting or 1.0
+ * - Nothing when setting
+ */
+ defaultPlaybackRate(rate) {
+ if (rate !== undefined) {
+ return this.techCall_('setDefaultPlaybackRate', rate);
+ }
+ if (this.tech_ && this.tech_.featuresPlaybackRate) {
+ return this.techGet_('defaultPlaybackRate');
+ }
+ return 1.0;
+ }
+
+ /**
+ * Gets or sets the audio flag
+ *
+ * @param {boolean} [bool]
+ * - true signals that this is an audio player
+ * - false signals that this is not an audio player
+ *
+ * @return {boolean|undefined}
+ * - The current value of isAudio when getting
+ * - Nothing when setting
+ */
+ isAudio(bool) {
+ if (bool !== undefined) {
+ this.isAudio_ = !!bool;
+ return;
+ }
+ return !!this.isAudio_;
+ }
+ enableAudioOnlyUI_() {
+ // Update styling immediately to show the control bar so we can get its height
+ this.addClass('vjs-audio-only-mode');
+ const playerChildren = this.children();
+ const controlBar = this.getChild('ControlBar');
+ const controlBarHeight = controlBar && controlBar.currentHeight();
+
+ // Hide all player components except the control bar. Control bar components
+ // needed only for video are hidden with CSS
+ playerChildren.forEach(child => {
+ if (child === controlBar) {
+ return;
+ }
+ if (child.el_ && !child.hasClass('vjs-hidden')) {
+ child.hide();
+ this.audioOnlyCache_.hiddenChildren.push(child);
+ }
+ });
+ this.audioOnlyCache_.playerHeight = this.currentHeight();
+
+ // Set the player height the same as the control bar
+ this.height(controlBarHeight);
+ this.trigger('audioonlymodechange');
+ }
+ disableAudioOnlyUI_() {
+ this.removeClass('vjs-audio-only-mode');
+
+ // Show player components that were previously hidden
+ this.audioOnlyCache_.hiddenChildren.forEach(child => child.show());
+
+ // Reset player height
+ this.height(this.audioOnlyCache_.playerHeight);
+ this.trigger('audioonlymodechange');
+ }
+
+ /**
+ * Get the current audioOnlyMode state or set audioOnlyMode to true or false.
+ *
+ * Setting this to `true` will hide all player components except the control bar,
+ * as well as control bar components needed only for video.
+ *
+ * @param {boolean} [value]
+ * The value to set audioOnlyMode to.
+ *
+ * @return {Promise|boolean}
+ * A Promise is returned when setting the state, and a boolean when getting
+ * the present state
+ */
+ audioOnlyMode(value) {
+ if (typeof value !== 'boolean' || value === this.audioOnlyMode_) {
+ return this.audioOnlyMode_;
+ }
+ this.audioOnlyMode_ = value;
+
+ // Enable Audio Only Mode
+ if (value) {
+ const exitPromises = [];
+
+ // Fullscreen and PiP are not supported in audioOnlyMode, so exit if we need to.
+ if (this.isInPictureInPicture()) {
+ exitPromises.push(this.exitPictureInPicture());
+ }
+ if (this.isFullscreen()) {
+ exitPromises.push(this.exitFullscreen());
+ }
+ if (this.audioPosterMode()) {
+ exitPromises.push(this.audioPosterMode(false));
+ }
+ return Promise.all(exitPromises).then(() => this.enableAudioOnlyUI_());
+ }
+
+ // Disable Audio Only Mode
+ return Promise.resolve().then(() => this.disableAudioOnlyUI_());
+ }
+ enablePosterModeUI_() {
+ // Hide the video element and show the poster image to enable posterModeUI
+ const tech = this.tech_ && this.tech_;
+ tech.hide();
+ this.addClass('vjs-audio-poster-mode');
+ this.trigger('audiopostermodechange');
+ }
+ disablePosterModeUI_() {
+ // Show the video element and hide the poster image to disable posterModeUI
+ const tech = this.tech_ && this.tech_;
+ tech.show();
+ this.removeClass('vjs-audio-poster-mode');
+ this.trigger('audiopostermodechange');
+ }
+
+ /**
+ * Get the current audioPosterMode state or set audioPosterMode to true or false
+ *
+ * @param {boolean} [value]
+ * The value to set audioPosterMode to.
+ *
+ * @return {Promise|boolean}
+ * A Promise is returned when setting the state, and a boolean when getting
+ * the present state
+ */
+ audioPosterMode(value) {
+ if (typeof value !== 'boolean' || value === this.audioPosterMode_) {
+ return this.audioPosterMode_;
+ }
+ this.audioPosterMode_ = value;
+ if (value) {
+ if (this.audioOnlyMode()) {
+ const audioOnlyModePromise = this.audioOnlyMode(false);
+ return audioOnlyModePromise.then(() => {
+ // enable audio poster mode after audio only mode is disabled
+ this.enablePosterModeUI_();
+ });
+ }
+ return Promise.resolve().then(() => {
+ // enable audio poster mode
+ this.enablePosterModeUI_();
+ });
+ }
+ return Promise.resolve().then(() => {
+ // disable audio poster mode
+ this.disablePosterModeUI_();
+ });
+ }
+
+ /**
+ * A helper method for adding a {@link TextTrack} to our
+ * {@link TextTrackList}.
+ *
+ * In addition to the W3C settings we allow adding additional info through options.
+ *
+ * @see http://www.w3.org/html/wg/drafts/html/master/embedded-content-0.html#dom-media-addtexttrack
+ *
+ * @param {string} [kind]
+ * the kind of TextTrack you are adding
+ *
+ * @param {string} [label]
+ * the label to give the TextTrack label
+ *
+ * @param {string} [language]
+ * the language to set on the TextTrack
+ *
+ * @return {TextTrack|undefined}
+ * the TextTrack that was added or undefined
+ * if there is no tech
+ */
+ addTextTrack(kind, label, language) {
+ if (this.tech_) {
+ return this.tech_.addTextTrack(kind, label, language);
+ }
+ }
+
+ /**
+ * Create a remote {@link TextTrack} and an {@link HTMLTrackElement}.
+ *
+ * @param {Object} options
+ * Options to pass to {@link HTMLTrackElement} during creation. See
+ * {@link HTMLTrackElement} for object properties that you should use.
+ *
+ * @param {boolean} [manualCleanup=false] if set to true, the TextTrack will not be removed
+ * from the TextTrackList and HtmlTrackElementList
+ * after a source change
+ *
+ * @return { import('./tracks/html-track-element').default }
+ * the HTMLTrackElement that was created and added
+ * to the HtmlTrackElementList and the remote
+ * TextTrackList
+ *
+ */
+ addRemoteTextTrack(options, manualCleanup) {
+ if (this.tech_) {
+ return this.tech_.addRemoteTextTrack(options, manualCleanup);
+ }
+ }
+
+ /**
+ * Remove a remote {@link TextTrack} from the respective
+ * {@link TextTrackList} and {@link HtmlTrackElementList}.
+ *
+ * @param {Object} track
+ * Remote {@link TextTrack} to remove
+ *
+ * @return {undefined}
+ * does not return anything
+ */
+ removeRemoteTextTrack(obj = {}) {
+ let {
+ track
+ } = obj;
+ if (!track) {
+ track = obj;
+ }
+
+ // destructure the input into an object with a track argument, defaulting to arguments[0]
+ // default the whole argument to an empty object if nothing was passed in
+
+ if (this.tech_) {
+ return this.tech_.removeRemoteTextTrack(track);
+ }
+ }
+
+ /**
+ * Gets available media playback quality metrics as specified by the W3C's Media
+ * Playback Quality API.
+ *
+ * @see [Spec]{@link https://wicg.github.io/media-playback-quality}
+ *
+ * @return {Object|undefined}
+ * An object with supported media playback quality metrics or undefined if there
+ * is no tech or the tech does not support it.
+ */
+ getVideoPlaybackQuality() {
+ return this.techGet_('getVideoPlaybackQuality');
+ }
+
+ /**
+ * Get video width
+ *
+ * @return {number}
+ * current video width
+ */
+ videoWidth() {
+ return this.tech_ && this.tech_.videoWidth && this.tech_.videoWidth() || 0;
+ }
+
+ /**
+ * Get video height
+ *
+ * @return {number}
+ * current video height
+ */
+ videoHeight() {
+ return this.tech_ && this.tech_.videoHeight && this.tech_.videoHeight() || 0;
+ }
+
+ /**
+ * Set or get the player's language code.
+ *
+ * Changing the language will trigger
+ * [languagechange]{@link Player#event:languagechange}
+ * which Components can use to update control text.
+ * ClickableComponent will update its control text by default on
+ * [languagechange]{@link Player#event:languagechange}.
+ *
+ * @fires Player#languagechange
+ *
+ * @param {string} [code]
+ * the language code to set the player to
+ *
+ * @return {string|undefined}
+ * - The current language code when getting
+ * - Nothing when setting
+ */
+ language(code) {
+ if (code === undefined) {
+ return this.language_;
+ }
+ if (this.language_ !== String(code).toLowerCase()) {
+ this.language_ = String(code).toLowerCase();
+
+ // during first init, it's possible some things won't be evented
+ if (isEvented(this)) {
+ /**
+ * fires when the player language change
+ *
+ * @event Player#languagechange
+ * @type {Event}
+ */
+ this.trigger('languagechange');
+ }
+ }
+ }
+
+ /**
+ * Get the player's language dictionary
+ * Merge every time, because a newly added plugin might call videojs.addLanguage() at any time
+ * Languages specified directly in the player options have precedence
+ *
+ * @return {Array}
+ * An array of of supported languages
+ */
+ languages() {
+ return merge$2(Player.prototype.options_.languages, this.languages_);
+ }
+
+ /**
+ * returns a JavaScript object representing the current track
+ * information. **DOES not return it as JSON**
+ *
+ * @return {Object}
+ * Object representing the current of track info
+ */
+ toJSON() {
+ const options = merge$2(this.options_);
+ const tracks = options.tracks;
+ options.tracks = [];
+ for (let i = 0; i < tracks.length; i++) {
+ let track = tracks[i];
+
+ // deep merge tracks and null out player so no circular references
+ track = merge$2(track);
+ track.player = undefined;
+ options.tracks[i] = track;
+ }
+ return options;
+ }
+
+ /**
+ * Creates a simple modal dialog (an instance of the {@link ModalDialog}
+ * component) that immediately overlays the player with arbitrary
+ * content and removes itself when closed.
+ *
+ * @param {string|Function|Element|Array|null} content
+ * Same as {@link ModalDialog#content}'s param of the same name.
+ * The most straight-forward usage is to provide a string or DOM
+ * element.
+ *
+ * @param {Object} [options]
+ * Extra options which will be passed on to the {@link ModalDialog}.
+ *
+ * @return {ModalDialog}
+ * the {@link ModalDialog} that was created
+ */
+ createModal(content, options) {
+ options = options || {};
+ options.content = content || '';
+ const modal = new ModalDialog(this, options);
+ this.addChild(modal);
+ modal.on('dispose', () => {
+ this.removeChild(modal);
+ });
+ modal.open();
+ return modal;
+ }
+
+ /**
+ * Change breakpoint classes when the player resizes.
+ *
+ * @private
+ */
+ updateCurrentBreakpoint_() {
+ if (!this.responsive()) {
+ return;
+ }
+ const currentBreakpoint = this.currentBreakpoint();
+ const currentWidth = this.currentWidth();
+ for (let i = 0; i < BREAKPOINT_ORDER.length; i++) {
+ const candidateBreakpoint = BREAKPOINT_ORDER[i];
+ const maxWidth = this.breakpoints_[candidateBreakpoint];
+ if (currentWidth <= maxWidth) {
+ // The current breakpoint did not change, nothing to do.
+ if (currentBreakpoint === candidateBreakpoint) {
+ return;
+ }
+
+ // Only remove a class if there is a current breakpoint.
+ if (currentBreakpoint) {
+ this.removeClass(BREAKPOINT_CLASSES[currentBreakpoint]);
+ }
+ this.addClass(BREAKPOINT_CLASSES[candidateBreakpoint]);
+ this.breakpoint_ = candidateBreakpoint;
+ break;
+ }
+ }
+ }
+
+ /**
+ * Removes the current breakpoint.
+ *
+ * @private
+ */
+ removeCurrentBreakpoint_() {
+ const className = this.currentBreakpointClass();
+ this.breakpoint_ = '';
+ if (className) {
+ this.removeClass(className);
+ }
+ }
+
+ /**
+ * Get or set breakpoints on the player.
+ *
+ * Calling this method with an object or `true` will remove any previous
+ * custom breakpoints and start from the defaults again.
+ *
+ * @param {Object|boolean} [breakpoints]
+ * If an object is given, it can be used to provide custom
+ * breakpoints. If `true` is given, will set default breakpoints.
+ * If this argument is not given, will simply return the current
+ * breakpoints.
+ *
+ * @param {number} [breakpoints.tiny]
+ * The maximum width for the "vjs-layout-tiny" class.
+ *
+ * @param {number} [breakpoints.xsmall]
+ * The maximum width for the "vjs-layout-x-small" class.
+ *
+ * @param {number} [breakpoints.small]
+ * The maximum width for the "vjs-layout-small" class.
+ *
+ * @param {number} [breakpoints.medium]
+ * The maximum width for the "vjs-layout-medium" class.
+ *
+ * @param {number} [breakpoints.large]
+ * The maximum width for the "vjs-layout-large" class.
+ *
+ * @param {number} [breakpoints.xlarge]
+ * The maximum width for the "vjs-layout-x-large" class.
+ *
+ * @param {number} [breakpoints.huge]
+ * The maximum width for the "vjs-layout-huge" class.
+ *
+ * @return {Object}
+ * An object mapping breakpoint names to maximum width values.
+ */
+ breakpoints(breakpoints) {
+ // Used as a getter.
+ if (breakpoints === undefined) {
+ return Object.assign(this.breakpoints_);
+ }
+ this.breakpoint_ = '';
+ this.breakpoints_ = Object.assign({}, DEFAULT_BREAKPOINTS, breakpoints);
+
+ // When breakpoint definitions change, we need to update the currently
+ // selected breakpoint.
+ this.updateCurrentBreakpoint_();
+
+ // Clone the breakpoints before returning.
+ return Object.assign(this.breakpoints_);
+ }
+
+ /**
+ * Get or set a flag indicating whether or not this player should adjust
+ * its UI based on its dimensions.
+ *
+ * @param {boolean} [value]
+ * Should be `true` if the player should adjust its UI based on its
+ * dimensions; otherwise, should be `false`.
+ *
+ * @return {boolean|undefined}
+ * Will be `true` if this player should adjust its UI based on its
+ * dimensions; otherwise, will be `false`.
+ * Nothing if setting
+ */
+ responsive(value) {
+ // Used as a getter.
+ if (value === undefined) {
+ return this.responsive_;
+ }
+ value = Boolean(value);
+ const current = this.responsive_;
+
+ // Nothing changed.
+ if (value === current) {
+ return;
+ }
+
+ // The value actually changed, set it.
+ this.responsive_ = value;
+
+ // Start listening for breakpoints and set the initial breakpoint if the
+ // player is now responsive.
+ if (value) {
+ this.on('playerresize', this.boundUpdateCurrentBreakpoint_);
+ this.updateCurrentBreakpoint_();
+
+ // Stop listening for breakpoints if the player is no longer responsive.
+ } else {
+ this.off('playerresize', this.boundUpdateCurrentBreakpoint_);
+ this.removeCurrentBreakpoint_();
+ }
+ return value;
+ }
+
+ /**
+ * Get current breakpoint name, if any.
+ *
+ * @return {string}
+ * If there is currently a breakpoint set, returns a the key from the
+ * breakpoints object matching it. Otherwise, returns an empty string.
+ */
+ currentBreakpoint() {
+ return this.breakpoint_;
+ }
+
+ /**
+ * Get the current breakpoint class name.
+ *
+ * @return {string}
+ * The matching class name (e.g. `"vjs-layout-tiny"` or
+ * `"vjs-layout-large"`) for the current breakpoint. Empty string if
+ * there is no current breakpoint.
+ */
+ currentBreakpointClass() {
+ return BREAKPOINT_CLASSES[this.breakpoint_] || '';
+ }
+
+ /**
+ * An object that describes a single piece of media.
+ *
+ * Properties that are not part of this type description will be retained; so,
+ * this can be viewed as a generic metadata storage mechanism as well.
+ *
+ * @see {@link https://wicg.github.io/mediasession/#the-mediametadata-interface}
+ * @typedef {Object} Player~MediaObject
+ *
+ * @property {string} [album]
+ * Unused, except if this object is passed to the `MediaSession`
+ * API.
+ *
+ * @property {string} [artist]
+ * Unused, except if this object is passed to the `MediaSession`
+ * API.
+ *
+ * @property {Object[]} [artwork]
+ * Unused, except if this object is passed to the `MediaSession`
+ * API. If not specified, will be populated via the `poster`, if
+ * available.
+ *
+ * @property {string} [poster]
+ * URL to an image that will display before playback.
+ *
+ * @property {Tech~SourceObject|Tech~SourceObject[]|string} [src]
+ * A single source object, an array of source objects, or a string
+ * referencing a URL to a media source. It is _highly recommended_
+ * that an object or array of objects is used here, so that source
+ * selection algorithms can take the `type` into account.
+ *
+ * @property {string} [title]
+ * Unused, except if this object is passed to the `MediaSession`
+ * API.
+ *
+ * @property {Object[]} [textTracks]
+ * An array of objects to be used to create text tracks, following
+ * the {@link https://www.w3.org/TR/html50/embedded-content-0.html#the-track-element|native track element format}.
+ * For ease of removal, these will be created as "remote" text
+ * tracks and set to automatically clean up on source changes.
+ *
+ * These objects may have properties like `src`, `kind`, `label`,
+ * and `language`, see {@link Tech#createRemoteTextTrack}.
+ */
+
+ /**
+ * Populate the player using a {@link Player~MediaObject|MediaObject}.
+ *
+ * @param {Player~MediaObject} media
+ * A media object.
+ *
+ * @param {Function} ready
+ * A callback to be called when the player is ready.
+ */
+ loadMedia(media, ready) {
+ if (!media || typeof media !== 'object') {
+ return;
+ }
+ const crossOrigin = this.crossOrigin();
+ this.reset();
+
+ // Clone the media object so it cannot be mutated from outside.
+ this.cache_.media = merge$2(media);
+ const {
+ artist,
+ artwork,
+ description,
+ poster,
+ src,
+ textTracks,
+ title
+ } = this.cache_.media;
+
+ // If `artwork` is not given, create it using `poster`.
+ if (!artwork && poster) {
+ this.cache_.media.artwork = [{
+ src: poster,
+ type: getMimetype(poster)
+ }];
+ }
+ if (crossOrigin) {
+ this.crossOrigin(crossOrigin);
+ }
+ if (src) {
+ this.src(src);
+ }
+ if (poster) {
+ this.poster(poster);
+ }
+ if (Array.isArray(textTracks)) {
+ textTracks.forEach(tt => this.addRemoteTextTrack(tt, false));
+ }
+ if (this.titleBar) {
+ this.titleBar.update({
+ title,
+ description: description || artist || ''
+ });
+ }
+ this.ready(ready);
+ }
+
+ /**
+ * Get a clone of the current {@link Player~MediaObject} for this player.
+ *
+ * If the `loadMedia` method has not been used, will attempt to return a
+ * {@link Player~MediaObject} based on the current state of the player.
+ *
+ * @return {Player~MediaObject}
+ */
+ getMedia() {
+ if (!this.cache_.media) {
+ const poster = this.poster();
+ const src = this.currentSources();
+ const textTracks = Array.prototype.map.call(this.remoteTextTracks(), tt => ({
+ kind: tt.kind,
+ label: tt.label,
+ language: tt.language,
+ src: tt.src
+ }));
+ const media = {
+ src,
+ textTracks
+ };
+ if (poster) {
+ media.poster = poster;
+ media.artwork = [{
+ src: media.poster,
+ type: getMimetype(media.poster)
+ }];
+ }
+ return media;
+ }
+ return merge$2(this.cache_.media);
+ }
+
+ /**
+ * Gets tag settings
+ *
+ * @param {Element} tag
+ * The player tag
+ *
+ * @return {Object}
+ * An object containing all of the settings
+ * for a player tag
+ */
+ static getTagSettings(tag) {
+ const baseOptions = {
+ sources: [],
+ tracks: []
+ };
+ const tagOptions = getAttributes(tag);
+ const dataSetup = tagOptions['data-setup'];
+ if (hasClass(tag, 'vjs-fill')) {
+ tagOptions.fill = true;
+ }
+ if (hasClass(tag, 'vjs-fluid')) {
+ tagOptions.fluid = true;
+ }
+
+ // Check if data-setup attr exists.
+ if (dataSetup !== null) {
+ // Parse options JSON
+ // If empty string, make it a parsable json object.
+ const [err, data] = tuple(dataSetup || '{}');
+ if (err) {
+ log$1.error(err);
+ }
+ Object.assign(tagOptions, data);
+ }
+ Object.assign(baseOptions, tagOptions);
+
+ // Get tag children settings
+ if (tag.hasChildNodes()) {
+ const children = tag.childNodes;
+ for (let i = 0, j = children.length; i < j; i++) {
+ const child = children[i];
+ // Change case needed: http://ejohn.org/blog/nodename-case-sensitivity/
+ const childName = child.nodeName.toLowerCase();
+ if (childName === 'source') {
+ baseOptions.sources.push(getAttributes(child));
+ } else if (childName === 'track') {
+ baseOptions.tracks.push(getAttributes(child));
+ }
+ }
+ }
+ return baseOptions;
+ }
+
+ /**
+ * Set debug mode to enable/disable logs at info level.
+ *
+ * @param {boolean} enabled
+ * @fires Player#debugon
+ * @fires Player#debugoff
+ * @return {boolean|undefined}
+ */
+ debug(enabled) {
+ if (enabled === undefined) {
+ return this.debugEnabled_;
+ }
+ if (enabled) {
+ this.trigger('debugon');
+ this.previousLogLevel_ = this.log.level;
+ this.log.level('debug');
+ this.debugEnabled_ = true;
+ } else {
+ this.trigger('debugoff');
+ this.log.level(this.previousLogLevel_);
+ this.previousLogLevel_ = undefined;
+ this.debugEnabled_ = false;
+ }
+ }
+
+ /**
+ * Set or get current playback rates.
+ * Takes an array and updates the playback rates menu with the new items.
+ * Pass in an empty array to hide the menu.
+ * Values other than arrays are ignored.
+ *
+ * @fires Player#playbackrateschange
+ * @param {number[]} [newRates]
+ * The new rates that the playback rates menu should update to.
+ * An empty array will hide the menu
+ * @return {number[]} When used as a getter will return the current playback rates
+ */
+ playbackRates(newRates) {
+ if (newRates === undefined) {
+ return this.cache_.playbackRates;
+ }
+
+ // ignore any value that isn't an array
+ if (!Array.isArray(newRates)) {
+ return;
+ }
+
+ // ignore any arrays that don't only contain numbers
+ if (!newRates.every(rate => typeof rate === 'number')) {
+ return;
+ }
+ this.cache_.playbackRates = newRates;
+
+ /**
+ * fires when the playback rates in a player are changed
+ *
+ * @event Player#playbackrateschange
+ * @type {Event}
+ */
+ this.trigger('playbackrateschange');
+ }
+ }
+
+ /**
+ * Get the {@link VideoTrackList}
+ *
+ * @link https://html.spec.whatwg.org/multipage/embedded-content.html#videotracklist
+ *
+ * @return {VideoTrackList}
+ * the current video track list
+ *
+ * @method Player.prototype.videoTracks
+ */
+
+ /**
+ * Get the {@link AudioTrackList}
+ *
+ * @link https://html.spec.whatwg.org/multipage/embedded-content.html#audiotracklist
+ *
+ * @return {AudioTrackList}
+ * the current audio track list
+ *
+ * @method Player.prototype.audioTracks
+ */
+
+ /**
+ * Get the {@link TextTrackList}
+ *
+ * @link http://www.w3.org/html/wg/drafts/html/master/embedded-content-0.html#dom-media-texttracks
+ *
+ * @return {TextTrackList}
+ * the current text track list
+ *
+ * @method Player.prototype.textTracks
+ */
+
+ /**
+ * Get the remote {@link TextTrackList}
+ *
+ * @return {TextTrackList}
+ * The current remote text track list
+ *
+ * @method Player.prototype.remoteTextTracks
+ */
+
+ /**
+ * Get the remote {@link HtmlTrackElementList} tracks.
+ *
+ * @return {HtmlTrackElementList}
+ * The current remote text track element list
+ *
+ * @method Player.prototype.remoteTextTrackEls
+ */
+
+ ALL.names.forEach(function (name) {
+ const props = ALL[name];
+ Player.prototype[props.getterName] = function () {
+ if (this.tech_) {
+ return this.tech_[props.getterName]();
+ }
+
+ // if we have not yet loadTech_, we create {video,audio,text}Tracks_
+ // these will be passed to the tech during loading
+ this[props.privateName] = this[props.privateName] || new props.ListClass();
+ return this[props.privateName];
+ };
+ });
+
+ /**
+ * Get or set the `Player`'s crossorigin option. For the HTML5 player, this
+ * sets the `crossOrigin` property on the `<video>` tag to control the CORS
+ * behavior.
+ *
+ * @see [Video Element Attributes]{@link https://developer.mozilla.org/en-US/docs/Web/HTML/Element/video#attr-crossorigin}
+ *
+ * @param {string} [value]
+ * The value to set the `Player`'s crossorigin to. If an argument is
+ * given, must be one of `anonymous` or `use-credentials`.
+ *
+ * @return {string|undefined}
+ * - The current crossorigin value of the `Player` when getting.
+ * - undefined when setting
+ */
+ Player.prototype.crossorigin = Player.prototype.crossOrigin;
+
+ /**
+ * Global enumeration of players.
+ *
+ * The keys are the player IDs and the values are either the {@link Player}
+ * instance or `null` for disposed players.
+ *
+ * @type {Object}
+ */
+ Player.players = {};
+ const navigator = window.navigator;
+
+ /*
+ * Player instance options, surfaced using options
+ * options = Player.prototype.options_
+ * Make changes in options, not here.
+ *
+ * @type {Object}
+ * @private
+ */
+ Player.prototype.options_ = {
+ // Default order of fallback technology
+ techOrder: Tech.defaultTechOrder_,
+ html5: {},
+ // enable sourceset by default
+ enableSourceset: true,
+ // default inactivity timeout
+ inactivityTimeout: 2000,
+ // default playback rates
+ playbackRates: [],
+ // Add playback rate selection by adding rates
+ // 'playbackRates': [0.5, 1, 1.5, 2],
+ liveui: false,
+ // Included control sets
+ children: ['mediaLoader', 'posterImage', 'titleBar', 'textTrackDisplay', 'loadingSpinner', 'bigPlayButton', 'liveTracker', 'controlBar', 'errorDisplay', 'textTrackSettings', 'resizeManager'],
+ language: navigator && (navigator.languages && navigator.languages[0] || navigator.userLanguage || navigator.language) || 'en',
+ // locales and their language translations
+ languages: {},
+ // Default message to show when a video cannot be played.
+ notSupportedMessage: 'No compatible source was found for this media.',
+ normalizeAutoplay: false,
+ fullscreen: {
+ options: {
+ navigationUI: 'hide'
+ }
+ },
+ breakpoints: {},
+ responsive: false,
+ audioOnlyMode: false,
+ audioPosterMode: false,
+ // Default smooth seeking to false
+ enableSmoothSeeking: false
+ };
+ TECH_EVENTS_RETRIGGER.forEach(function (event) {
+ Player.prototype[`handleTech${toTitleCase$1(event)}_`] = function () {
+ return this.trigger(event);
+ };
+ });
+
+ /**
+ * Fired when the player has initial duration and dimension information
+ *
+ * @event Player#loadedmetadata
+ * @type {Event}
+ */
+
+ /**
+ * Fired when the player has downloaded data at the current playback position
+ *
+ * @event Player#loadeddata
+ * @type {Event}
+ */
+
+ /**
+ * Fired when the current playback position has changed *
+ * During playback this is fired every 15-250 milliseconds, depending on the
+ * playback technology in use.
+ *
+ * @event Player#timeupdate
+ * @type {Event}
+ */
+
+ /**
+ * Fired when the volume changes
+ *
+ * @event Player#volumechange
+ * @type {Event}
+ */
+
+ /**
+ * Reports whether or not a player has a plugin available.
+ *
+ * This does not report whether or not the plugin has ever been initialized
+ * on this player. For that, [usingPlugin]{@link Player#usingPlugin}.
+ *
+ * @method Player#hasPlugin
+ * @param {string} name
+ * The name of a plugin.
+ *
+ * @return {boolean}
+ * Whether or not this player has the requested plugin available.
+ */
+
+ /**
+ * Reports whether or not a player is using a plugin by name.
+ *
+ * For basic plugins, this only reports whether the plugin has _ever_ been
+ * initialized on this player.
+ *
+ * @method Player#usingPlugin
+ * @param {string} name
+ * The name of a plugin.
+ *
+ * @return {boolean}
+ * Whether or not this player is using the requested plugin.
+ */
+
+ Component$1.registerComponent('Player', Player);
+
+ /**
+ * @file plugin.js
+ */
+
+ /**
+ * The base plugin name.
+ *
+ * @private
+ * @constant
+ * @type {string}
+ */
+ const BASE_PLUGIN_NAME = 'plugin';
+
+ /**
+ * The key on which a player's active plugins cache is stored.
+ *
+ * @private
+ * @constant
+ * @type {string}
+ */
+ const PLUGIN_CACHE_KEY = 'activePlugins_';
+
+ /**
+ * Stores registered plugins in a private space.
+ *
+ * @private
+ * @type {Object}
+ */
+ const pluginStorage = {};
+
+ /**
+ * Reports whether or not a plugin has been registered.
+ *
+ * @private
+ * @param {string} name
+ * The name of a plugin.
+ *
+ * @return {boolean}
+ * Whether or not the plugin has been registered.
+ */
+ const pluginExists = name => pluginStorage.hasOwnProperty(name);
+
+ /**
+ * Get a single registered plugin by name.
+ *
+ * @private
+ * @param {string} name
+ * The name of a plugin.
+ *
+ * @return {typeof Plugin|Function|undefined}
+ * The plugin (or undefined).
+ */
+ const getPlugin = name => pluginExists(name) ? pluginStorage[name] : undefined;
+
+ /**
+ * Marks a plugin as "active" on a player.
+ *
+ * Also, ensures that the player has an object for tracking active plugins.
+ *
+ * @private
+ * @param {Player} player
+ * A Video.js player instance.
+ *
+ * @param {string} name
+ * The name of a plugin.
+ */
+ const markPluginAsActive = (player, name) => {
+ player[PLUGIN_CACHE_KEY] = player[PLUGIN_CACHE_KEY] || {};
+ player[PLUGIN_CACHE_KEY][name] = true;
+ };
+
+ /**
+ * Triggers a pair of plugin setup events.
+ *
+ * @private
+ * @param {Player} player
+ * A Video.js player instance.
+ *
+ * @param {PluginEventHash} hash
+ * A plugin event hash.
+ *
+ * @param {boolean} [before]
+ * If true, prefixes the event name with "before". In other words,
+ * use this to trigger "beforepluginsetup" instead of "pluginsetup".
+ */
+ const triggerSetupEvent = (player, hash, before) => {
+ const eventName = (before ? 'before' : '') + 'pluginsetup';
+ player.trigger(eventName, hash);
+ player.trigger(eventName + ':' + hash.name, hash);
+ };
+
+ /**
+ * Takes a basic plugin function and returns a wrapper function which marks
+ * on the player that the plugin has been activated.
+ *
+ * @private
+ * @param {string} name
+ * The name of the plugin.
+ *
+ * @param {Function} plugin
+ * The basic plugin.
+ *
+ * @return {Function}
+ * A wrapper function for the given plugin.
+ */
+ const createBasicPlugin = function (name, plugin) {
+ const basicPluginWrapper = function () {
+ // We trigger the "beforepluginsetup" and "pluginsetup" events on the player
+ // regardless, but we want the hash to be consistent with the hash provided
+ // for advanced plugins.
+ //
+ // The only potentially counter-intuitive thing here is the `instance` in
+ // the "pluginsetup" event is the value returned by the `plugin` function.
+ triggerSetupEvent(this, {
+ name,
+ plugin,
+ instance: null
+ }, true);
+ const instance = plugin.apply(this, arguments);
+ markPluginAsActive(this, name);
+ triggerSetupEvent(this, {
+ name,
+ plugin,
+ instance
+ });
+ return instance;
+ };
+ Object.keys(plugin).forEach(function (prop) {
+ basicPluginWrapper[prop] = plugin[prop];
+ });
+ return basicPluginWrapper;
+ };
+
+ /**
+ * Takes a plugin sub-class and returns a factory function for generating
+ * instances of it.
+ *
+ * This factory function will replace itself with an instance of the requested
+ * sub-class of Plugin.
+ *
+ * @private
+ * @param {string} name
+ * The name of the plugin.
+ *
+ * @param {Plugin} PluginSubClass
+ * The advanced plugin.
+ *
+ * @return {Function}
+ */
+ const createPluginFactory = (name, PluginSubClass) => {
+ // Add a `name` property to the plugin prototype so that each plugin can
+ // refer to itself by name.
+ PluginSubClass.prototype.name = name;
+ return function (...args) {
+ triggerSetupEvent(this, {
+ name,
+ plugin: PluginSubClass,
+ instance: null
+ }, true);
+ const instance = new PluginSubClass(...[this, ...args]);
+
+ // The plugin is replaced by a function that returns the current instance.
+ this[name] = () => instance;
+ triggerSetupEvent(this, instance.getEventHash());
+ return instance;
+ };
+ };
+
+ /**
+ * Parent class for all advanced plugins.
+ *
+ * @mixes module:evented~EventedMixin
+ * @mixes module:stateful~StatefulMixin
+ * @fires Player#beforepluginsetup
+ * @fires Player#beforepluginsetup:$name
+ * @fires Player#pluginsetup
+ * @fires Player#pluginsetup:$name
+ * @listens Player#dispose
+ * @throws {Error}
+ * If attempting to instantiate the base {@link Plugin} class
+ * directly instead of via a sub-class.
+ */
+ class Plugin {
+ /**
+ * Creates an instance of this class.
+ *
+ * Sub-classes should call `super` to ensure plugins are properly initialized.
+ *
+ * @param {Player} player
+ * A Video.js player instance.
+ */
+ constructor(player) {
+ if (this.constructor === Plugin) {
+ throw new Error('Plugin must be sub-classed; not directly instantiated.');
+ }
+ this.player = player;
+ if (!this.log) {
+ this.log = this.player.log.createLogger(this.name);
+ }
+
+ // Make this object evented, but remove the added `trigger` method so we
+ // use the prototype version instead.
+ evented(this);
+ delete this.trigger;
+ stateful(this, this.constructor.defaultState);
+ markPluginAsActive(player, this.name);
+
+ // Auto-bind the dispose method so we can use it as a listener and unbind
+ // it later easily.
+ this.dispose = this.dispose.bind(this);
+
+ // If the player is disposed, dispose the plugin.
+ player.on('dispose', this.dispose);
+ }
+
+ /**
+ * Get the version of the plugin that was set on <pluginName>.VERSION
+ */
+ version() {
+ return this.constructor.VERSION;
+ }
+
+ /**
+ * Each event triggered by plugins includes a hash of additional data with
+ * conventional properties.
+ *
+ * This returns that object or mutates an existing hash.
+ *
+ * @param {Object} [hash={}]
+ * An object to be used as event an event hash.
+ *
+ * @return {PluginEventHash}
+ * An event hash object with provided properties mixed-in.
+ */
+ getEventHash(hash = {}) {
+ hash.name = this.name;
+ hash.plugin = this.constructor;
+ hash.instance = this;
+ return hash;
+ }
+
+ /**
+ * Triggers an event on the plugin object and overrides
+ * {@link module:evented~EventedMixin.trigger|EventedMixin.trigger}.
+ *
+ * @param {string|Object} event
+ * An event type or an object with a type property.
+ *
+ * @param {Object} [hash={}]
+ * Additional data hash to merge with a
+ * {@link PluginEventHash|PluginEventHash}.
+ *
+ * @return {boolean}
+ * Whether or not default was prevented.
+ */
+ trigger(event, hash = {}) {
+ return trigger(this.eventBusEl_, event, this.getEventHash(hash));
+ }
+
+ /**
+ * Handles "statechanged" events on the plugin. No-op by default, override by
+ * subclassing.
+ *
+ * @abstract
+ * @param {Event} e
+ * An event object provided by a "statechanged" event.
+ *
+ * @param {Object} e.changes
+ * An object describing changes that occurred with the "statechanged"
+ * event.
+ */
+ handleStateChanged(e) {}
+
+ /**
+ * Disposes a plugin.
+ *
+ * Subclasses can override this if they want, but for the sake of safety,
+ * it's probably best to subscribe the "dispose" event.
+ *
+ * @fires Plugin#dispose
+ */
+ dispose() {
+ const {
+ name,
+ player
+ } = this;
+
+ /**
+ * Signals that a advanced plugin is about to be disposed.
+ *
+ * @event Plugin#dispose
+ * @type {Event}
+ */
+ this.trigger('dispose');
+ this.off();
+ player.off('dispose', this.dispose);
+
+ // Eliminate any possible sources of leaking memory by clearing up
+ // references between the player and the plugin instance and nulling out
+ // the plugin's state and replacing methods with a function that throws.
+ player[PLUGIN_CACHE_KEY][name] = false;
+ this.player = this.state = null;
+
+ // Finally, replace the plugin name on the player with a new factory
+ // function, so that the plugin is ready to be set up again.
+ player[name] = createPluginFactory(name, pluginStorage[name]);
+ }
+
+ /**
+ * Determines if a plugin is a basic plugin (i.e. not a sub-class of `Plugin`).
+ *
+ * @param {string|Function} plugin
+ * If a string, matches the name of a plugin. If a function, will be
+ * tested directly.
+ *
+ * @return {boolean}
+ * Whether or not a plugin is a basic plugin.
+ */
+ static isBasic(plugin) {
+ const p = typeof plugin === 'string' ? getPlugin(plugin) : plugin;
+ return typeof p === 'function' && !Plugin.prototype.isPrototypeOf(p.prototype);
+ }
+
+ /**
+ * Register a Video.js plugin.
+ *
+ * @param {string} name
+ * The name of the plugin to be registered. Must be a string and
+ * must not match an existing plugin or a method on the `Player`
+ * prototype.
+ *
+ * @param {typeof Plugin|Function} plugin
+ * A sub-class of `Plugin` or a function for basic plugins.
+ *
+ * @return {typeof Plugin|Function}
+ * For advanced plugins, a factory function for that plugin. For
+ * basic plugins, a wrapper function that initializes the plugin.
+ */
+ static registerPlugin(name, plugin) {
+ if (typeof name !== 'string') {
+ throw new Error(`Illegal plugin name, "${name}", must be a string, was ${typeof name}.`);
+ }
+ if (pluginExists(name)) {
+ log$1.warn(`A plugin named "${name}" already exists. You may want to avoid re-registering plugins!`);
+ } else if (Player.prototype.hasOwnProperty(name)) {
+ throw new Error(`Illegal plugin name, "${name}", cannot share a name with an existing player method!`);
+ }
+ if (typeof plugin !== 'function') {
+ throw new Error(`Illegal plugin for "${name}", must be a function, was ${typeof plugin}.`);
+ }
+ pluginStorage[name] = plugin;
+
+ // Add a player prototype method for all sub-classed plugins (but not for
+ // the base Plugin class).
+ if (name !== BASE_PLUGIN_NAME) {
+ if (Plugin.isBasic(plugin)) {
+ Player.prototype[name] = createBasicPlugin(name, plugin);
+ } else {
+ Player.prototype[name] = createPluginFactory(name, plugin);
+ }
+ }
+ return plugin;
+ }
+
+ /**
+ * De-register a Video.js plugin.
+ *
+ * @param {string} name
+ * The name of the plugin to be de-registered. Must be a string that
+ * matches an existing plugin.
+ *
+ * @throws {Error}
+ * If an attempt is made to de-register the base plugin.
+ */
+ static deregisterPlugin(name) {
+ if (name === BASE_PLUGIN_NAME) {
+ throw new Error('Cannot de-register base plugin.');
+ }
+ if (pluginExists(name)) {
+ delete pluginStorage[name];
+ delete Player.prototype[name];
+ }
+ }
+
+ /**
+ * Gets an object containing multiple Video.js plugins.
+ *
+ * @param {Array} [names]
+ * If provided, should be an array of plugin names. Defaults to _all_
+ * plugin names.
+ *
+ * @return {Object|undefined}
+ * An object containing plugin(s) associated with their name(s) or
+ * `undefined` if no matching plugins exist).
+ */
+ static getPlugins(names = Object.keys(pluginStorage)) {
+ let result;
+ names.forEach(name => {
+ const plugin = getPlugin(name);
+ if (plugin) {
+ result = result || {};
+ result[name] = plugin;
+ }
+ });
+ return result;
+ }
+
+ /**
+ * Gets a plugin's version, if available
+ *
+ * @param {string} name
+ * The name of a plugin.
+ *
+ * @return {string}
+ * The plugin's version or an empty string.
+ */
+ static getPluginVersion(name) {
+ const plugin = getPlugin(name);
+ return plugin && plugin.VERSION || '';
+ }
+ }
+
+ /**
+ * Gets a plugin by name if it exists.
+ *
+ * @static
+ * @method getPlugin
+ * @memberOf Plugin
+ * @param {string} name
+ * The name of a plugin.
+ *
+ * @returns {typeof Plugin|Function|undefined}
+ * The plugin (or `undefined`).
+ */
+ Plugin.getPlugin = getPlugin;
+
+ /**
+ * The name of the base plugin class as it is registered.
+ *
+ * @type {string}
+ */
+ Plugin.BASE_PLUGIN_NAME = BASE_PLUGIN_NAME;
+ Plugin.registerPlugin(BASE_PLUGIN_NAME, Plugin);
+
+ /**
+ * Documented in player.js
+ *
+ * @ignore
+ */
+ Player.prototype.usingPlugin = function (name) {
+ return !!this[PLUGIN_CACHE_KEY] && this[PLUGIN_CACHE_KEY][name] === true;
+ };
+
+ /**
+ * Documented in player.js
+ *
+ * @ignore
+ */
+ Player.prototype.hasPlugin = function (name) {
+ return !!pluginExists(name);
+ };
+
+ /**
+ * Signals that a plugin is about to be set up on a player.
+ *
+ * @event Player#beforepluginsetup
+ * @type {PluginEventHash}
+ */
+
+ /**
+ * Signals that a plugin is about to be set up on a player - by name. The name
+ * is the name of the plugin.
+ *
+ * @event Player#beforepluginsetup:$name
+ * @type {PluginEventHash}
+ */
+
+ /**
+ * Signals that a plugin has just been set up on a player.
+ *
+ * @event Player#pluginsetup
+ * @type {PluginEventHash}
+ */
+
+ /**
+ * Signals that a plugin has just been set up on a player - by name. The name
+ * is the name of the plugin.
+ *
+ * @event Player#pluginsetup:$name
+ * @type {PluginEventHash}
+ */
+
+ /**
+ * @typedef {Object} PluginEventHash
+ *
+ * @property {string} instance
+ * For basic plugins, the return value of the plugin function. For
+ * advanced plugins, the plugin instance on which the event is fired.
+ *
+ * @property {string} name
+ * The name of the plugin.
+ *
+ * @property {string} plugin
+ * For basic plugins, the plugin function. For advanced plugins, the
+ * plugin class/constructor.
+ */
+
+ /**
+ * @file deprecate.js
+ * @module deprecate
+ */
+
+ /**
+ * Decorate a function with a deprecation message the first time it is called.
+ *
+ * @param {string} message
+ * A deprecation message to log the first time the returned function
+ * is called.
+ *
+ * @param {Function} fn
+ * The function to be deprecated.
+ *
+ * @return {Function}
+ * A wrapper function that will log a deprecation warning the first
+ * time it is called. The return value will be the return value of
+ * the wrapped function.
+ */
+ function deprecate(message, fn) {
+ let warned = false;
+ return function (...args) {
+ if (!warned) {
+ log$1.warn(message);
+ }
+ warned = true;
+ return fn.apply(this, args);
+ };
+ }
+
+ /**
+ * Internal function used to mark a function as deprecated in the next major
+ * version with consistent messaging.
+ *
+ * @param {number} major The major version where it will be removed
+ * @param {string} oldName The old function name
+ * @param {string} newName The new function name
+ * @param {Function} fn The function to deprecate
+ * @return {Function} The decorated function
+ */
+ function deprecateForMajor(major, oldName, newName, fn) {
+ return deprecate(`${oldName} is deprecated and will be removed in ${major}.0; please use ${newName} instead.`, fn);
+ }
+
+ var VjsErrors = {
+ UnsupportedSidxContainer: 'unsupported-sidx-container-error',
+ DashManifestSidxParsingError: 'dash-manifest-sidx-parsing-error',
+ HlsPlaylistRequestError: 'hls-playlist-request-error',
+ SegmentUnsupportedMediaFormat: 'segment-unsupported-media-format-error',
+ UnsupportedMediaInitialization: 'unsupported-media-initialization-error',
+ SegmentSwitchError: 'segment-switch-error',
+ SegmentExceedsSourceBufferQuota: 'segment-exceeds-source-buffer-quota-error',
+ SegmentAppendError: 'segment-append-error',
+ VttLoadError: 'vtt-load-error',
+ VttCueParsingError: 'vtt-cue-parsing-error',
+ // Errors used in contrib-ads:
+ AdsBeforePrerollError: 'ads-before-preroll-error',
+ AdsPrerollError: 'ads-preroll-error',
+ AdsMidrollError: 'ads-midroll-error',
+ AdsPostrollError: 'ads-postroll-error',
+ AdsMacroReplacementFailed: 'ads-macro-replacement-failed',
+ AdsResumeContentFailed: 'ads-resume-content-failed',
+ // Errors used in contrib-eme:
+ EMEFailedToRequestMediaKeySystemAccess: 'eme-failed-request-media-key-system-access',
+ EMEFailedToCreateMediaKeys: 'eme-failed-create-media-keys',
+ EMEFailedToAttachMediaKeysToVideoElement: 'eme-failed-attach-media-keys-to-video',
+ EMEFailedToCreateMediaKeySession: 'eme-failed-create-media-key-session',
+ EMEFailedToSetServerCertificate: 'eme-failed-set-server-certificate',
+ EMEFailedToGenerateLicenseRequest: 'eme-failed-generate-license-request',
+ EMEFailedToUpdateSessionWithReceivedLicenseKeys: 'eme-failed-update-session',
+ EMEFailedToCloseSession: 'eme-failed-close-session',
+ EMEFailedToRemoveKeysFromSession: 'eme-failed-remove-keys',
+ EMEFailedToLoadSessionBySessionId: 'eme-failed-load-session'
+ };
+
+ /**
+ * @file video.js
+ * @module videojs
+ */
+
+ /**
+ * Normalize an `id` value by trimming off a leading `#`
+ *
+ * @private
+ * @param {string} id
+ * A string, maybe with a leading `#`.
+ *
+ * @return {string}
+ * The string, without any leading `#`.
+ */
+ const normalizeId = id => id.indexOf('#') === 0 ? id.slice(1) : id;
+
+ /**
+ * A callback that is called when a component is ready. Does not have any
+ * parameters and any callback value will be ignored. See: {@link Component~ReadyCallback}
+ *
+ * @callback ReadyCallback
+ */
+
+ /**
+ * The `videojs()` function doubles as the main function for users to create a
+ * {@link Player} instance as well as the main library namespace.
+ *
+ * It can also be used as a getter for a pre-existing {@link Player} instance.
+ * However, we _strongly_ recommend using `videojs.getPlayer()` for this
+ * purpose because it avoids any potential for unintended initialization.
+ *
+ * Due to [limitations](https://github.com/jsdoc3/jsdoc/issues/955#issuecomment-313829149)
+ * of our JSDoc template, we cannot properly document this as both a function
+ * and a namespace, so its function signature is documented here.
+ *
+ * #### Arguments
+ * ##### id
+ * string|Element, **required**
+ *
+ * Video element or video element ID.
+ *
+ * ##### options
+ * Object, optional
+ *
+ * Options object for providing settings.
+ * See: [Options Guide](https://docs.videojs.com/tutorial-options.html).
+ *
+ * ##### ready
+ * {@link Component~ReadyCallback}, optional
+ *
+ * A function to be called when the {@link Player} and {@link Tech} are ready.
+ *
+ * #### Return Value
+ *
+ * The `videojs()` function returns a {@link Player} instance.
+ *
+ * @namespace
+ *
+ * @borrows AudioTrack as AudioTrack
+ * @borrows Component.getComponent as getComponent
+ * @borrows module:events.on as on
+ * @borrows module:events.one as one
+ * @borrows module:events.off as off
+ * @borrows module:events.trigger as trigger
+ * @borrows EventTarget as EventTarget
+ * @borrows module:middleware.use as use
+ * @borrows Player.players as players
+ * @borrows Plugin.registerPlugin as registerPlugin
+ * @borrows Plugin.deregisterPlugin as deregisterPlugin
+ * @borrows Plugin.getPlugins as getPlugins
+ * @borrows Plugin.getPlugin as getPlugin
+ * @borrows Plugin.getPluginVersion as getPluginVersion
+ * @borrows Tech.getTech as getTech
+ * @borrows Tech.registerTech as registerTech
+ * @borrows TextTrack as TextTrack
+ * @borrows VideoTrack as VideoTrack
+ *
+ * @param {string|Element} id
+ * Video element or video element ID.
+ *
+ * @param {Object} [options]
+ * Options object for providing settings.
+ * See: [Options Guide](https://docs.videojs.com/tutorial-options.html).
+ *
+ * @param {ReadyCallback} [ready]
+ * A function to be called when the {@link Player} and {@link Tech} are
+ * ready.
+ *
+ * @return {Player}
+ * The `videojs()` function returns a {@link Player|Player} instance.
+ */
+ function videojs(id, options, ready) {
+ let player = videojs.getPlayer(id);
+ if (player) {
+ if (options) {
+ log$1.warn(`Player "${id}" is already initialised. Options will not be applied.`);
+ }
+ if (ready) {
+ player.ready(ready);
+ }
+ return player;
+ }
+ const el = typeof id === 'string' ? $('#' + normalizeId(id)) : id;
+ if (!isEl(el)) {
+ throw new TypeError('The element or ID supplied is not valid. (videojs)');
+ }
+
+ // document.body.contains(el) will only check if el is contained within that one document.
+ // This causes problems for elements in iframes.
+ // Instead, use the element's ownerDocument instead of the global document.
+ // This will make sure that the element is indeed in the dom of that document.
+ // Additionally, check that the document in question has a default view.
+ // If the document is no longer attached to the dom, the defaultView of the document will be null.
+ // If element is inside Shadow DOM (e.g. is part of a Custom element), ownerDocument.body
+ // always returns false. Instead, use the Shadow DOM root.
+ const inShadowDom = 'getRootNode' in el ? el.getRootNode() instanceof window.ShadowRoot : false;
+ const rootNode = inShadowDom ? el.getRootNode() : el.ownerDocument.body;
+ if (!el.ownerDocument.defaultView || !rootNode.contains(el)) {
+ log$1.warn('The element supplied is not included in the DOM');
+ }
+ options = options || {};
+
+ // Store a copy of the el before modification, if it is to be restored in destroy()
+ // If div ingest, store the parent div
+ if (options.restoreEl === true) {
+ options.restoreEl = (el.parentNode && el.parentNode.hasAttribute('data-vjs-player') ? el.parentNode : el).cloneNode(true);
+ }
+ hooks('beforesetup').forEach(hookFunction => {
+ const opts = hookFunction(el, merge$2(options));
+ if (!isObject$1(opts) || Array.isArray(opts)) {
+ log$1.error('please return an object in beforesetup hooks');
+ return;
+ }
+ options = merge$2(options, opts);
+ });
+
+ // We get the current "Player" component here in case an integration has
+ // replaced it with a custom player.
+ const PlayerComponent = Component$1.getComponent('Player');
+ player = new PlayerComponent(el, options, ready);
+ hooks('setup').forEach(hookFunction => hookFunction(player));
+ return player;
+ }
+ videojs.hooks_ = hooks_;
+ videojs.hooks = hooks;
+ videojs.hook = hook;
+ videojs.hookOnce = hookOnce;
+ videojs.removeHook = removeHook;
+
+ // Add default styles
+ if (window.VIDEOJS_NO_DYNAMIC_STYLE !== true && isReal()) {
+ let style = $('.vjs-styles-defaults');
+ if (!style) {
+ style = createStyleElement('vjs-styles-defaults');
+ const head = $('head');
+ if (head) {
+ head.insertBefore(style, head.firstChild);
+ }
+ setTextContent(style, `
+ .video-js {
+ width: 300px;
+ height: 150px;
+ }
+
+ .vjs-fluid:not(.vjs-audio-only-mode) {
+ padding-top: 56.25%
+ }
+ `);
+ }
+ }
+
+ // Run Auto-load players
+ // You have to wait at least once in case this script is loaded after your
+ // video in the DOM (weird behavior only with minified version)
+ autoSetupTimeout(1, videojs);
+
+ /**
+ * Current Video.js version. Follows [semantic versioning](https://semver.org/).
+ *
+ * @type {string}
+ */
+ videojs.VERSION = version$5;
+
+ /**
+ * The global options object. These are the settings that take effect
+ * if no overrides are specified when the player is created.
+ *
+ * @type {Object}
+ */
+ videojs.options = Player.prototype.options_;
+
+ /**
+ * Get an object with the currently created players, keyed by player ID
+ *
+ * @return {Object}
+ * The created players
+ */
+ videojs.getPlayers = () => Player.players;
+
+ /**
+ * Get a single player based on an ID or DOM element.
+ *
+ * This is useful if you want to check if an element or ID has an associated
+ * Video.js player, but not create one if it doesn't.
+ *
+ * @param {string|Element} id
+ * An HTML element - `<video>`, `<audio>`, or `<video-js>` -
+ * or a string matching the `id` of such an element.
+ *
+ * @return {Player|undefined}
+ * A player instance or `undefined` if there is no player instance
+ * matching the argument.
+ */
+ videojs.getPlayer = id => {
+ const players = Player.players;
+ let tag;
+ if (typeof id === 'string') {
+ const nId = normalizeId(id);
+ const player = players[nId];
+ if (player) {
+ return player;
+ }
+ tag = $('#' + nId);
+ } else {
+ tag = id;
+ }
+ if (isEl(tag)) {
+ const {
+ player,
+ playerId
+ } = tag;
+
+ // Element may have a `player` property referring to an already created
+ // player instance. If so, return that.
+ if (player || players[playerId]) {
+ return player || players[playerId];
+ }
+ }
+ };
+
+ /**
+ * Returns an array of all current players.
+ *
+ * @return {Array}
+ * An array of all players. The array will be in the order that
+ * `Object.keys` provides, which could potentially vary between
+ * JavaScript engines.
+ *
+ */
+ videojs.getAllPlayers = () =>
+ // Disposed players leave a key with a `null` value, so we need to make sure
+ // we filter those out.
+ Object.keys(Player.players).map(k => Player.players[k]).filter(Boolean);
+ videojs.players = Player.players;
+ videojs.getComponent = Component$1.getComponent;
+
+ /**
+ * Register a component so it can referred to by name. Used when adding to other
+ * components, either through addChild `component.addChild('myComponent')` or through
+ * default children options `{ children: ['myComponent'] }`.
+ *
+ * > NOTE: You could also just initialize the component before adding.
+ * `component.addChild(new MyComponent());`
+ *
+ * @param {string} name
+ * The class name of the component
+ *
+ * @param {typeof Component} comp
+ * The component class
+ *
+ * @return {typeof Component}
+ * The newly registered component
+ */
+ videojs.registerComponent = (name, comp) => {
+ if (Tech.isTech(comp)) {
+ log$1.warn(`The ${name} tech was registered as a component. It should instead be registered using videojs.registerTech(name, tech)`);
+ }
+ return Component$1.registerComponent.call(Component$1, name, comp);
+ };
+ videojs.getTech = Tech.getTech;
+ videojs.registerTech = Tech.registerTech;
+ videojs.use = use;
+
+ /**
+ * An object that can be returned by a middleware to signify
+ * that the middleware is being terminated.
+ *
+ * @type {object}
+ * @property {object} middleware.TERMINATOR
+ */
+ Object.defineProperty(videojs, 'middleware', {
+ value: {},
+ writeable: false,
+ enumerable: true
+ });
+ Object.defineProperty(videojs.middleware, 'TERMINATOR', {
+ value: TERMINATOR,
+ writeable: false,
+ enumerable: true
+ });
+
+ /**
+ * A reference to the {@link module:browser|browser utility module} as an object.
+ *
+ * @type {Object}
+ * @see {@link module:browser|browser}
+ */
+ videojs.browser = browser;
+
+ /**
+ * A reference to the {@link module:obj|obj utility module} as an object.
+ *
+ * @type {Object}
+ * @see {@link module:obj|obj}
+ */
+ videojs.obj = Obj;
+
+ /**
+ * Deprecated reference to the {@link module:obj.merge|merge function}
+ *
+ * @type {Function}
+ * @see {@link module:obj.merge|merge}
+ * @deprecated Deprecated and will be removed in 9.0. Please use videojs.obj.merge instead.
+ */
+ videojs.mergeOptions = deprecateForMajor(9, 'videojs.mergeOptions', 'videojs.obj.merge', merge$2);
+
+ /**
+ * Deprecated reference to the {@link module:obj.defineLazyProperty|defineLazyProperty function}
+ *
+ * @type {Function}
+ * @see {@link module:obj.defineLazyProperty|defineLazyProperty}
+ * @deprecated Deprecated and will be removed in 9.0. Please use videojs.obj.defineLazyProperty instead.
+ */
+ videojs.defineLazyProperty = deprecateForMajor(9, 'videojs.defineLazyProperty', 'videojs.obj.defineLazyProperty', defineLazyProperty);
+
+ /**
+ * Deprecated reference to the {@link module:fn.bind_|fn.bind_ function}
+ *
+ * @type {Function}
+ * @see {@link module:fn.bind_|fn.bind_}
+ * @deprecated Deprecated and will be removed in 9.0. Please use native Function.prototype.bind instead.
+ */
+ videojs.bind = deprecateForMajor(9, 'videojs.bind', 'native Function.prototype.bind', bind_);
+ videojs.registerPlugin = Plugin.registerPlugin;
+ videojs.deregisterPlugin = Plugin.deregisterPlugin;
+
+ /**
+ * Deprecated method to register a plugin with Video.js
+ *
+ * @deprecated Deprecated and will be removed in 9.0. Use videojs.registerPlugin() instead.
+ *
+ * @param {string} name
+ * The plugin name
+ *
+ * @param {typeof Plugin|Function} plugin
+ * The plugin sub-class or function
+ *
+ * @return {typeof Plugin|Function}
+ */
+ videojs.plugin = (name, plugin) => {
+ log$1.warn('videojs.plugin() is deprecated; use videojs.registerPlugin() instead');
+ return Plugin.registerPlugin(name, plugin);
+ };
+ videojs.getPlugins = Plugin.getPlugins;
+ videojs.getPlugin = Plugin.getPlugin;
+ videojs.getPluginVersion = Plugin.getPluginVersion;
+
+ /**
+ * Adding languages so that they're available to all players.
+ * Example: `videojs.addLanguage('es', { 'Hello': 'Hola' });`
+ *
+ * @param {string} code
+ * The language code or dictionary property
+ *
+ * @param {Object} data
+ * The data values to be translated
+ *
+ * @return {Object}
+ * The resulting language dictionary object
+ */
+ videojs.addLanguage = function (code, data) {
+ code = ('' + code).toLowerCase();
+ videojs.options.languages = merge$2(videojs.options.languages, {
+ [code]: data
+ });
+ return videojs.options.languages[code];
+ };
+
+ /**
+ * A reference to the {@link module:log|log utility module} as an object.
+ *
+ * @type {Function}
+ * @see {@link module:log|log}
+ */
+ videojs.log = log$1;
+ videojs.createLogger = createLogger;
+
+ /**
+ * A reference to the {@link module:time|time utility module} as an object.
+ *
+ * @type {Object}
+ * @see {@link module:time|time}
+ */
+ videojs.time = Time;
+
+ /**
+ * Deprecated reference to the {@link module:time.createTimeRanges|createTimeRanges function}
+ *
+ * @type {Function}
+ * @see {@link module:time.createTimeRanges|createTimeRanges}
+ * @deprecated Deprecated and will be removed in 9.0. Please use videojs.time.createTimeRanges instead.
+ */
+ videojs.createTimeRange = deprecateForMajor(9, 'videojs.createTimeRange', 'videojs.time.createTimeRanges', createTimeRanges$1);
+
+ /**
+ * Deprecated reference to the {@link module:time.createTimeRanges|createTimeRanges function}
+ *
+ * @type {Function}
+ * @see {@link module:time.createTimeRanges|createTimeRanges}
+ * @deprecated Deprecated and will be removed in 9.0. Please use videojs.time.createTimeRanges instead.
+ */
+ videojs.createTimeRanges = deprecateForMajor(9, 'videojs.createTimeRanges', 'videojs.time.createTimeRanges', createTimeRanges$1);
+
+ /**
+ * Deprecated reference to the {@link module:time.formatTime|formatTime function}
+ *
+ * @type {Function}
+ * @see {@link module:time.formatTime|formatTime}
+ * @deprecated Deprecated and will be removed in 9.0. Please use videojs.time.format instead.
+ */
+ videojs.formatTime = deprecateForMajor(9, 'videojs.formatTime', 'videojs.time.formatTime', formatTime);
+
+ /**
+ * Deprecated reference to the {@link module:time.setFormatTime|setFormatTime function}
+ *
+ * @type {Function}
+ * @see {@link module:time.setFormatTime|setFormatTime}
+ * @deprecated Deprecated and will be removed in 9.0. Please use videojs.time.setFormat instead.
+ */
+ videojs.setFormatTime = deprecateForMajor(9, 'videojs.setFormatTime', 'videojs.time.setFormatTime', setFormatTime);
+
+ /**
+ * Deprecated reference to the {@link module:time.resetFormatTime|resetFormatTime function}
+ *
+ * @type {Function}
+ * @see {@link module:time.resetFormatTime|resetFormatTime}
+ * @deprecated Deprecated and will be removed in 9.0. Please use videojs.time.resetFormat instead.
+ */
+ videojs.resetFormatTime = deprecateForMajor(9, 'videojs.resetFormatTime', 'videojs.time.resetFormatTime', resetFormatTime);
+
+ /**
+ * Deprecated reference to the {@link module:url.parseUrl|Url.parseUrl function}
+ *
+ * @type {Function}
+ * @see {@link module:url.parseUrl|parseUrl}
+ * @deprecated Deprecated and will be removed in 9.0. Please use videojs.url.parseUrl instead.
+ */
+ videojs.parseUrl = deprecateForMajor(9, 'videojs.parseUrl', 'videojs.url.parseUrl', parseUrl);
+
+ /**
+ * Deprecated reference to the {@link module:url.isCrossOrigin|Url.isCrossOrigin function}
+ *
+ * @type {Function}
+ * @see {@link module:url.isCrossOrigin|isCrossOrigin}
+ * @deprecated Deprecated and will be removed in 9.0. Please use videojs.url.isCrossOrigin instead.
+ */
+ videojs.isCrossOrigin = deprecateForMajor(9, 'videojs.isCrossOrigin', 'videojs.url.isCrossOrigin', isCrossOrigin);
+ videojs.EventTarget = EventTarget$2;
+ videojs.any = any;
+ videojs.on = on;
+ videojs.one = one;
+ videojs.off = off;
+ videojs.trigger = trigger;
+
+ /**
+ * A cross-browser XMLHttpRequest wrapper.
+ *
+ * @function
+ * @param {Object} options
+ * Settings for the request.
+ *
+ * @return {XMLHttpRequest|XDomainRequest}
+ * The request object.
+ *
+ * @see https://github.com/Raynos/xhr
+ */
+ videojs.xhr = lib;
+ videojs.TextTrack = TextTrack;
+ videojs.AudioTrack = AudioTrack;
+ videojs.VideoTrack = VideoTrack;
+ ['isEl', 'isTextNode', 'createEl', 'hasClass', 'addClass', 'removeClass', 'toggleClass', 'setAttributes', 'getAttributes', 'emptyEl', 'appendContent', 'insertContent'].forEach(k => {
+ videojs[k] = function () {
+ log$1.warn(`videojs.${k}() is deprecated; use videojs.dom.${k}() instead`);
+ return Dom[k].apply(null, arguments);
+ };
+ });
+ videojs.computedStyle = deprecateForMajor(9, 'videojs.computedStyle', 'videojs.dom.computedStyle', computedStyle);
+
+ /**
+ * A reference to the {@link module:dom|DOM utility module} as an object.
+ *
+ * @type {Object}
+ * @see {@link module:dom|dom}
+ */
+ videojs.dom = Dom;
+
+ /**
+ * A reference to the {@link module:fn|fn utility module} as an object.
+ *
+ * @type {Object}
+ * @see {@link module:fn|fn}
+ */
+ videojs.fn = Fn;
+
+ /**
+ * A reference to the {@link module:num|num utility module} as an object.
+ *
+ * @type {Object}
+ * @see {@link module:num|num}
+ */
+ videojs.num = Num;
+
+ /**
+ * A reference to the {@link module:str|str utility module} as an object.
+ *
+ * @type {Object}
+ * @see {@link module:str|str}
+ */
+ videojs.str = Str;
+
+ /**
+ * A reference to the {@link module:url|URL utility module} as an object.
+ *
+ * @type {Object}
+ * @see {@link module:url|url}
+ */
+ videojs.url = Url;
+
+ // The list of possible error types to occur in video.js
+ videojs.Error = VjsErrors;
+
+ createCommonjsModule(function (module, exports) {
+ /*! @name videojs-contrib-quality-levels @version 4.1.0 @license Apache-2.0 */
+ (function (global, factory) {
+ module.exports = factory(videojs) ;
+ })(commonjsGlobal, function (videojs) {
+
+ function _interopDefaultLegacy(e) {
+ return e && typeof e === 'object' && 'default' in e ? e : {
+ 'default': e
+ };
+ }
+ var videojs__default = /*#__PURE__*/_interopDefaultLegacy(videojs);
+
+ /**
+ * A single QualityLevel.
+ *
+ * interface QualityLevel {
+ * readonly attribute DOMString id;
+ * attribute DOMString label;
+ * readonly attribute long width;
+ * readonly attribute long height;
+ * readonly attribute long bitrate;
+ * attribute boolean enabled;
+ * };
+ *
+ * @class QualityLevel
+ */
+ class QualityLevel {
+ /**
+ * Creates a QualityLevel
+ *
+ * @param {Representation|Object} representation The representation of the quality level
+ * @param {string} representation.id Unique id of the QualityLevel
+ * @param {number=} representation.width Resolution width of the QualityLevel
+ * @param {number=} representation.height Resolution height of the QualityLevel
+ * @param {number} representation.bandwidth Bitrate of the QualityLevel
+ * @param {number=} representation.frameRate Frame-rate of the QualityLevel
+ * @param {Function} representation.enabled Callback to enable/disable QualityLevel
+ */
+ constructor(representation) {
+ let level = this; // eslint-disable-line
+
+ level.id = representation.id;
+ level.label = level.id;
+ level.width = representation.width;
+ level.height = representation.height;
+ level.bitrate = representation.bandwidth;
+ level.frameRate = representation.frameRate;
+ level.enabled_ = representation.enabled;
+ Object.defineProperty(level, 'enabled', {
+ /**
+ * Get whether the QualityLevel is enabled.
+ *
+ * @return {boolean} True if the QualityLevel is enabled.
+ */
+ get() {
+ return level.enabled_();
+ },
+ /**
+ * Enable or disable the QualityLevel.
+ *
+ * @param {boolean} enable true to enable QualityLevel, false to disable.
+ */
+ set(enable) {
+ level.enabled_(enable);
+ }
+ });
+ return level;
+ }
+ }
+
+ /**
+ * A list of QualityLevels.
+ *
+ * interface QualityLevelList : EventTarget {
+ * getter QualityLevel (unsigned long index);
+ * readonly attribute unsigned long length;
+ * readonly attribute long selectedIndex;
+ *
+ * void addQualityLevel(QualityLevel qualityLevel)
+ * void removeQualityLevel(QualityLevel remove)
+ * QualityLevel? getQualityLevelById(DOMString id);
+ *
+ * attribute EventHandler onchange;
+ * attribute EventHandler onaddqualitylevel;
+ * attribute EventHandler onremovequalitylevel;
+ * };
+ *
+ * @extends videojs.EventTarget
+ * @class QualityLevelList
+ */
+ class QualityLevelList extends videojs__default["default"].EventTarget {
+ /**
+ * Creates a QualityLevelList.
+ */
+ constructor() {
+ super();
+ let list = this; // eslint-disable-line
+
+ list.levels_ = [];
+ list.selectedIndex_ = -1;
+
+ /**
+ * Get the index of the currently selected QualityLevel.
+ *
+ * @returns {number} The index of the selected QualityLevel. -1 if none selected.
+ * @readonly
+ */
+ Object.defineProperty(list, 'selectedIndex', {
+ get() {
+ return list.selectedIndex_;
+ }
+ });
+
+ /**
+ * Get the length of the list of QualityLevels.
+ *
+ * @returns {number} The length of the list.
+ * @readonly
+ */
+ Object.defineProperty(list, 'length', {
+ get() {
+ return list.levels_.length;
+ }
+ });
+ list[Symbol.iterator] = () => list.levels_.values();
+ return list;
+ }
+
+ /**
+ * Adds a quality level to the list.
+ *
+ * @param {Representation|Object} representation The representation of the quality level
+ * @param {string} representation.id Unique id of the QualityLevel
+ * @param {number=} representation.width Resolution width of the QualityLevel
+ * @param {number=} representation.height Resolution height of the QualityLevel
+ * @param {number} representation.bandwidth Bitrate of the QualityLevel
+ * @param {number=} representation.frameRate Frame-rate of the QualityLevel
+ * @param {Function} representation.enabled Callback to enable/disable QualityLevel
+ * @return {QualityLevel} the QualityLevel added to the list
+ * @method addQualityLevel
+ */
+ addQualityLevel(representation) {
+ let qualityLevel = this.getQualityLevelById(representation.id);
+
+ // Do not add duplicate quality levels
+ if (qualityLevel) {
+ return qualityLevel;
+ }
+ const index = this.levels_.length;
+ qualityLevel = new QualityLevel(representation);
+ if (!('' + index in this)) {
+ Object.defineProperty(this, index, {
+ get() {
+ return this.levels_[index];
+ }
+ });
+ }
+ this.levels_.push(qualityLevel);
+ this.trigger({
+ qualityLevel,
+ type: 'addqualitylevel'
+ });
+ return qualityLevel;
+ }
+
+ /**
+ * Removes a quality level from the list.
+ *
+ * @param {QualityLevel} qualityLevel The QualityLevel to remove from the list.
+ * @return {QualityLevel|null} the QualityLevel removed or null if nothing removed
+ * @method removeQualityLevel
+ */
+ removeQualityLevel(qualityLevel) {
+ let removed = null;
+ for (let i = 0, l = this.length; i < l; i++) {
+ if (this[i] === qualityLevel) {
+ removed = this.levels_.splice(i, 1)[0];
+ if (this.selectedIndex_ === i) {
+ this.selectedIndex_ = -1;
+ } else if (this.selectedIndex_ > i) {
+ this.selectedIndex_--;
+ }
+ break;
+ }
+ }
+ if (removed) {
+ this.trigger({
+ qualityLevel,
+ type: 'removequalitylevel'
+ });
+ }
+ return removed;
+ }
+
+ /**
+ * Searches for a QualityLevel with the given id.
+ *
+ * @param {string} id The id of the QualityLevel to find.
+ * @return {QualityLevel|null} The QualityLevel with id, or null if not found.
+ * @method getQualityLevelById
+ */
+ getQualityLevelById(id) {
+ for (let i = 0, l = this.length; i < l; i++) {
+ const level = this[i];
+ if (level.id === id) {
+ return level;
+ }
+ }
+ return null;
+ }
+
+ /**
+ * Resets the list of QualityLevels to empty
+ *
+ * @method dispose
+ */
+ dispose() {
+ this.selectedIndex_ = -1;
+ this.levels_.length = 0;
+ }
+ }
+
+ /**
+ * change - The selected QualityLevel has changed.
+ * addqualitylevel - A QualityLevel has been added to the QualityLevelList.
+ * removequalitylevel - A QualityLevel has been removed from the QualityLevelList.
+ */
+ QualityLevelList.prototype.allowedEvents_ = {
+ change: 'change',
+ addqualitylevel: 'addqualitylevel',
+ removequalitylevel: 'removequalitylevel'
+ };
+
+ // emulate attribute EventHandler support to allow for feature detection
+ for (const event in QualityLevelList.prototype.allowedEvents_) {
+ QualityLevelList.prototype['on' + event] = null;
+ }
+ var version = "4.1.0";
+
+ /**
+ * Initialization function for the qualityLevels plugin. Sets up the QualityLevelList and
+ * event handlers.
+ *
+ * @param {Player} player Player object.
+ * @param {Object} options Plugin options object.
+ * @return {QualityLevelList} a list of QualityLevels
+ */
+ const initPlugin = function (player, options) {
+ const originalPluginFn = player.qualityLevels;
+ const qualityLevelList = new QualityLevelList();
+ const disposeHandler = function () {
+ qualityLevelList.dispose();
+ player.qualityLevels = originalPluginFn;
+ player.off('dispose', disposeHandler);
+ };
+ player.on('dispose', disposeHandler);
+ player.qualityLevels = () => qualityLevelList;
+ player.qualityLevels.VERSION = version;
+ return qualityLevelList;
+ };
+
+ /**
+ * A video.js plugin.
+ *
+ * In the plugin function, the value of `this` is a video.js `Player`
+ * instance. You cannot rely on the player being in a "ready" state here,
+ * depending on how the plugin is invoked. This may or may not be important
+ * to you; if not, remove the wait for "ready"!
+ *
+ * @param {Object} options Plugin options object
+ * @return {QualityLevelList} a list of QualityLevels
+ */
+ const qualityLevels = function (options) {
+ return initPlugin(this, videojs__default["default"].obj.merge({}, options));
+ };
+
+ // Register the plugin with video.js.
+ videojs__default["default"].registerPlugin('qualityLevels', qualityLevels);
+
+ // Include the version number.
+ qualityLevels.VERSION = version;
+ return qualityLevels;
+ });
+ });
+
+ var urlToolkit = createCommonjsModule(function (module, exports) {
+ // see https://tools.ietf.org/html/rfc1808
+
+ (function (root) {
+ var URL_REGEX = /^(?=((?:[a-zA-Z0-9+\-.]+:)?))\1(?=((?:\/\/[^\/?#]*)?))\2(?=((?:(?:[^?#\/]*\/)*[^;?#\/]*)?))\3((?:;[^?#]*)?)(\?[^#]*)?(#[^]*)?$/;
+ var FIRST_SEGMENT_REGEX = /^(?=([^\/?#]*))\1([^]*)$/;
+ var SLASH_DOT_REGEX = /(?:\/|^)\.(?=\/)/g;
+ var SLASH_DOT_DOT_REGEX = /(?:\/|^)\.\.\/(?!\.\.\/)[^\/]*(?=\/)/g;
+ var URLToolkit = {
+ // If opts.alwaysNormalize is true then the path will always be normalized even when it starts with / or //
+ // E.g
+ // With opts.alwaysNormalize = false (default, spec compliant)
+ // http://a.com/b/cd + /e/f/../g => http://a.com/e/f/../g
+ // With opts.alwaysNormalize = true (not spec compliant)
+ // http://a.com/b/cd + /e/f/../g => http://a.com/e/g
+ buildAbsoluteURL: function (baseURL, relativeURL, opts) {
+ opts = opts || {};
+ // remove any remaining space and CRLF
+ baseURL = baseURL.trim();
+ relativeURL = relativeURL.trim();
+ if (!relativeURL) {
+ // 2a) If the embedded URL is entirely empty, it inherits the
+ // entire base URL (i.e., is set equal to the base URL)
+ // and we are done.
+ if (!opts.alwaysNormalize) {
+ return baseURL;
+ }
+ var basePartsForNormalise = URLToolkit.parseURL(baseURL);
+ if (!basePartsForNormalise) {
+ throw new Error('Error trying to parse base URL.');
+ }
+ basePartsForNormalise.path = URLToolkit.normalizePath(basePartsForNormalise.path);
+ return URLToolkit.buildURLFromParts(basePartsForNormalise);
+ }
+ var relativeParts = URLToolkit.parseURL(relativeURL);
+ if (!relativeParts) {
+ throw new Error('Error trying to parse relative URL.');
+ }
+ if (relativeParts.scheme) {
+ // 2b) If the embedded URL starts with a scheme name, it is
+ // interpreted as an absolute URL and we are done.
+ if (!opts.alwaysNormalize) {
+ return relativeURL;
+ }
+ relativeParts.path = URLToolkit.normalizePath(relativeParts.path);
+ return URLToolkit.buildURLFromParts(relativeParts);
+ }
+ var baseParts = URLToolkit.parseURL(baseURL);
+ if (!baseParts) {
+ throw new Error('Error trying to parse base URL.');
+ }
+ if (!baseParts.netLoc && baseParts.path && baseParts.path[0] !== '/') {
+ // If netLoc missing and path doesn't start with '/', assume everthing before the first '/' is the netLoc
+ // This causes 'example.com/a' to be handled as '//example.com/a' instead of '/example.com/a'
+ var pathParts = FIRST_SEGMENT_REGEX.exec(baseParts.path);
+ baseParts.netLoc = pathParts[1];
+ baseParts.path = pathParts[2];
+ }
+ if (baseParts.netLoc && !baseParts.path) {
+ baseParts.path = '/';
+ }
+ var builtParts = {
+ // 2c) Otherwise, the embedded URL inherits the scheme of
+ // the base URL.
+ scheme: baseParts.scheme,
+ netLoc: relativeParts.netLoc,
+ path: null,
+ params: relativeParts.params,
+ query: relativeParts.query,
+ fragment: relativeParts.fragment
+ };
+ if (!relativeParts.netLoc) {
+ // 3) If the embedded URL's <net_loc> is non-empty, we skip to
+ // Step 7. Otherwise, the embedded URL inherits the <net_loc>
+ // (if any) of the base URL.
+ builtParts.netLoc = baseParts.netLoc;
+ // 4) If the embedded URL path is preceded by a slash "/", the
+ // path is not relative and we skip to Step 7.
+ if (relativeParts.path[0] !== '/') {
+ if (!relativeParts.path) {
+ // 5) If the embedded URL path is empty (and not preceded by a
+ // slash), then the embedded URL inherits the base URL path
+ builtParts.path = baseParts.path;
+ // 5a) if the embedded URL's <params> is non-empty, we skip to
+ // step 7; otherwise, it inherits the <params> of the base
+ // URL (if any) and
+ if (!relativeParts.params) {
+ builtParts.params = baseParts.params;
+ // 5b) if the embedded URL's <query> is non-empty, we skip to
+ // step 7; otherwise, it inherits the <query> of the base
+ // URL (if any) and we skip to step 7.
+ if (!relativeParts.query) {
+ builtParts.query = baseParts.query;
+ }
+ }
+ } else {
+ // 6) The last segment of the base URL's path (anything
+ // following the rightmost slash "/", or the entire path if no
+ // slash is present) is removed and the embedded URL's path is
+ // appended in its place.
+ var baseURLPath = baseParts.path;
+ var newPath = baseURLPath.substring(0, baseURLPath.lastIndexOf('/') + 1) + relativeParts.path;
+ builtParts.path = URLToolkit.normalizePath(newPath);
+ }
+ }
+ }
+ if (builtParts.path === null) {
+ builtParts.path = opts.alwaysNormalize ? URLToolkit.normalizePath(relativeParts.path) : relativeParts.path;
+ }
+ return URLToolkit.buildURLFromParts(builtParts);
+ },
+ parseURL: function (url) {
+ var parts = URL_REGEX.exec(url);
+ if (!parts) {
+ return null;
+ }
+ return {
+ scheme: parts[1] || '',
+ netLoc: parts[2] || '',
+ path: parts[3] || '',
+ params: parts[4] || '',
+ query: parts[5] || '',
+ fragment: parts[6] || ''
+ };
+ },
+ normalizePath: function (path) {
+ // The following operations are
+ // then applied, in order, to the new path:
+ // 6a) All occurrences of "./", where "." is a complete path
+ // segment, are removed.
+ // 6b) If the path ends with "." as a complete path segment,
+ // that "." is removed.
+ path = path.split('').reverse().join('').replace(SLASH_DOT_REGEX, '');
+ // 6c) All occurrences of "<segment>/../", where <segment> is a
+ // complete path segment not equal to "..", are removed.
+ // Removal of these path segments is performed iteratively,
+ // removing the leftmost matching pattern on each iteration,
+ // until no matching pattern remains.
+ // 6d) If the path ends with "<segment>/..", where <segment> is a
+ // complete path segment not equal to "..", that
+ // "<segment>/.." is removed.
+ while (path.length !== (path = path.replace(SLASH_DOT_DOT_REGEX, '')).length) {}
+ return path.split('').reverse().join('');
+ },
+ buildURLFromParts: function (parts) {
+ return parts.scheme + parts.netLoc + parts.path + parts.params + parts.query + parts.fragment;
+ }
+ };
+ module.exports = URLToolkit;
+ })();
+ });
+
+ var DEFAULT_LOCATION = 'http://example.com';
+ var resolveUrl$1 = function resolveUrl(baseUrl, relativeUrl) {
+ // return early if we don't need to resolve
+ if (/^[a-z]+:/i.test(relativeUrl)) {
+ return relativeUrl;
+ } // if baseUrl is a data URI, ignore it and resolve everything relative to window.location
+
+ if (/^data:/.test(baseUrl)) {
+ baseUrl = window.location && window.location.href || '';
+ } // IE11 supports URL but not the URL constructor
+ // feature detect the behavior we want
+
+ var nativeURL = typeof window.URL === 'function';
+ var protocolLess = /^\/\//.test(baseUrl); // remove location if window.location isn't available (i.e. we're in node)
+ // and if baseUrl isn't an absolute url
+
+ var removeLocation = !window.location && !/\/\//i.test(baseUrl); // if the base URL is relative then combine with the current location
+
+ if (nativeURL) {
+ baseUrl = new window.URL(baseUrl, window.location || DEFAULT_LOCATION);
+ } else if (!/\/\//i.test(baseUrl)) {
+ baseUrl = urlToolkit.buildAbsoluteURL(window.location && window.location.href || '', baseUrl);
+ }
+ if (nativeURL) {
+ var newUrl = new URL(relativeUrl, baseUrl); // if we're a protocol-less url, remove the protocol
+ // and if we're location-less, remove the location
+ // otherwise, return the url unmodified
+
+ if (removeLocation) {
+ return newUrl.href.slice(DEFAULT_LOCATION.length);
+ } else if (protocolLess) {
+ return newUrl.href.slice(newUrl.protocol.length);
+ }
+ return newUrl.href;
+ }
+ return urlToolkit.buildAbsoluteURL(baseUrl, relativeUrl);
+ };
+
+ /**
+ * @file stream.js
+ */
+
+ /**
+ * A lightweight readable stream implemention that handles event dispatching.
+ *
+ * @class Stream
+ */
+ var Stream = /*#__PURE__*/function () {
+ function Stream() {
+ this.listeners = {};
+ }
+ /**
+ * Add a listener for a specified event type.
+ *
+ * @param {string} type the event name
+ * @param {Function} listener the callback to be invoked when an event of
+ * the specified type occurs
+ */
+
+ var _proto = Stream.prototype;
+ _proto.on = function on(type, listener) {
+ if (!this.listeners[type]) {
+ this.listeners[type] = [];
+ }
+ this.listeners[type].push(listener);
+ }
+ /**
+ * Remove a listener for a specified event type.
+ *
+ * @param {string} type the event name
+ * @param {Function} listener a function previously registered for this
+ * type of event through `on`
+ * @return {boolean} if we could turn it off or not
+ */;
+
+ _proto.off = function off(type, listener) {
+ if (!this.listeners[type]) {
+ return false;
+ }
+ var index = this.listeners[type].indexOf(listener); // TODO: which is better?
+ // In Video.js we slice listener functions
+ // on trigger so that it does not mess up the order
+ // while we loop through.
+ //
+ // Here we slice on off so that the loop in trigger
+ // can continue using it's old reference to loop without
+ // messing up the order.
+
+ this.listeners[type] = this.listeners[type].slice(0);
+ this.listeners[type].splice(index, 1);
+ return index > -1;
+ }
+ /**
+ * Trigger an event of the specified type on this stream. Any additional
+ * arguments to this function are passed as parameters to event listeners.
+ *
+ * @param {string} type the event name
+ */;
+
+ _proto.trigger = function trigger(type) {
+ var callbacks = this.listeners[type];
+ if (!callbacks) {
+ return;
+ } // Slicing the arguments on every invocation of this method
+ // can add a significant amount of overhead. Avoid the
+ // intermediate object creation for the common case of a
+ // single callback argument
+
+ if (arguments.length === 2) {
+ var length = callbacks.length;
+ for (var i = 0; i < length; ++i) {
+ callbacks[i].call(this, arguments[1]);
+ }
+ } else {
+ var args = Array.prototype.slice.call(arguments, 1);
+ var _length = callbacks.length;
+ for (var _i = 0; _i < _length; ++_i) {
+ callbacks[_i].apply(this, args);
+ }
+ }
+ }
+ /**
+ * Destroys the stream and cleans up.
+ */;
+
+ _proto.dispose = function dispose() {
+ this.listeners = {};
+ }
+ /**
+ * Forwards all `data` events on this stream to the destination stream. The
+ * destination stream should provide a method `push` to receive the data
+ * events as they arrive.
+ *
+ * @param {Stream} destination the stream that will receive all `data` events
+ * @see http://nodejs.org/api/stream.html#stream_readable_pipe_destination_options
+ */;
+
+ _proto.pipe = function pipe(destination) {
+ this.on('data', function (data) {
+ destination.push(data);
+ });
+ };
+ return Stream;
+ }();
+
+ var atob$1 = function atob(s) {
+ return window.atob ? window.atob(s) : Buffer.from(s, 'base64').toString('binary');
+ };
+ function decodeB64ToUint8Array$1(b64Text) {
+ var decodedString = atob$1(b64Text);
+ var array = new Uint8Array(decodedString.length);
+ for (var i = 0; i < decodedString.length; i++) {
+ array[i] = decodedString.charCodeAt(i);
+ }
+ return array;
+ }
+
+ /*! @name m3u8-parser @version 7.1.0 @license Apache-2.0 */
+
+ /**
+ * @file m3u8/line-stream.js
+ */
+ /**
+ * A stream that buffers string input and generates a `data` event for each
+ * line.
+ *
+ * @class LineStream
+ * @extends Stream
+ */
+
+ class LineStream extends Stream {
+ constructor() {
+ super();
+ this.buffer = '';
+ }
+ /**
+ * Add new data to be parsed.
+ *
+ * @param {string} data the text to process
+ */
+
+ push(data) {
+ let nextNewline;
+ this.buffer += data;
+ nextNewline = this.buffer.indexOf('\n');
+ for (; nextNewline > -1; nextNewline = this.buffer.indexOf('\n')) {
+ this.trigger('data', this.buffer.substring(0, nextNewline));
+ this.buffer = this.buffer.substring(nextNewline + 1);
+ }
+ }
+ }
+ const TAB = String.fromCharCode(0x09);
+ const parseByterange = function (byterangeString) {
+ // optionally match and capture 0+ digits before `@`
+ // optionally match and capture 0+ digits after `@`
+ const match = /([0-9.]*)?@?([0-9.]*)?/.exec(byterangeString || '');
+ const result = {};
+ if (match[1]) {
+ result.length = parseInt(match[1], 10);
+ }
+ if (match[2]) {
+ result.offset = parseInt(match[2], 10);
+ }
+ return result;
+ };
+ /**
+ * "forgiving" attribute list psuedo-grammar:
+ * attributes -> keyvalue (',' keyvalue)*
+ * keyvalue -> key '=' value
+ * key -> [^=]*
+ * value -> '"' [^"]* '"' | [^,]*
+ */
+
+ const attributeSeparator = function () {
+ const key = '[^=]*';
+ const value = '"[^"]*"|[^,]*';
+ const keyvalue = '(?:' + key + ')=(?:' + value + ')';
+ return new RegExp('(?:^|,)(' + keyvalue + ')');
+ };
+ /**
+ * Parse attributes from a line given the separator
+ *
+ * @param {string} attributes the attribute line to parse
+ */
+
+ const parseAttributes$1 = function (attributes) {
+ const result = {};
+ if (!attributes) {
+ return result;
+ } // split the string using attributes as the separator
+
+ const attrs = attributes.split(attributeSeparator());
+ let i = attrs.length;
+ let attr;
+ while (i--) {
+ // filter out unmatched portions of the string
+ if (attrs[i] === '') {
+ continue;
+ } // split the key and value
+
+ attr = /([^=]*)=(.*)/.exec(attrs[i]).slice(1); // trim whitespace and remove optional quotes around the value
+
+ attr[0] = attr[0].replace(/^\s+|\s+$/g, '');
+ attr[1] = attr[1].replace(/^\s+|\s+$/g, '');
+ attr[1] = attr[1].replace(/^['"](.*)['"]$/g, '$1');
+ result[attr[0]] = attr[1];
+ }
+ return result;
+ };
+ /**
+ * A line-level M3U8 parser event stream. It expects to receive input one
+ * line at a time and performs a context-free parse of its contents. A stream
+ * interpretation of a manifest can be useful if the manifest is expected to
+ * be too large to fit comfortably into memory or the entirety of the input
+ * is not immediately available. Otherwise, it's probably much easier to work
+ * with a regular `Parser` object.
+ *
+ * Produces `data` events with an object that captures the parser's
+ * interpretation of the input. That object has a property `tag` that is one
+ * of `uri`, `comment`, or `tag`. URIs only have a single additional
+ * property, `line`, which captures the entirety of the input without
+ * interpretation. Comments similarly have a single additional property
+ * `text` which is the input without the leading `#`.
+ *
+ * Tags always have a property `tagType` which is the lower-cased version of
+ * the M3U8 directive without the `#EXT` or `#EXT-X-` prefix. For instance,
+ * `#EXT-X-MEDIA-SEQUENCE` becomes `media-sequence` when parsed. Unrecognized
+ * tags are given the tag type `unknown` and a single additional property
+ * `data` with the remainder of the input.
+ *
+ * @class ParseStream
+ * @extends Stream
+ */
+
+ class ParseStream extends Stream {
+ constructor() {
+ super();
+ this.customParsers = [];
+ this.tagMappers = [];
+ }
+ /**
+ * Parses an additional line of input.
+ *
+ * @param {string} line a single line of an M3U8 file to parse
+ */
+
+ push(line) {
+ let match;
+ let event; // strip whitespace
+
+ line = line.trim();
+ if (line.length === 0) {
+ // ignore empty lines
+ return;
+ } // URIs
+
+ if (line[0] !== '#') {
+ this.trigger('data', {
+ type: 'uri',
+ uri: line
+ });
+ return;
+ } // map tags
+
+ const newLines = this.tagMappers.reduce((acc, mapper) => {
+ const mappedLine = mapper(line); // skip if unchanged
+
+ if (mappedLine === line) {
+ return acc;
+ }
+ return acc.concat([mappedLine]);
+ }, [line]);
+ newLines.forEach(newLine => {
+ for (let i = 0; i < this.customParsers.length; i++) {
+ if (this.customParsers[i].call(this, newLine)) {
+ return;
+ }
+ } // Comments
+
+ if (newLine.indexOf('#EXT') !== 0) {
+ this.trigger('data', {
+ type: 'comment',
+ text: newLine.slice(1)
+ });
+ return;
+ } // strip off any carriage returns here so the regex matching
+ // doesn't have to account for them.
+
+ newLine = newLine.replace('\r', ''); // Tags
+
+ match = /^#EXTM3U/.exec(newLine);
+ if (match) {
+ this.trigger('data', {
+ type: 'tag',
+ tagType: 'm3u'
+ });
+ return;
+ }
+ match = /^#EXTINF:([0-9\.]*)?,?(.*)?$/.exec(newLine);
+ if (match) {
+ event = {
+ type: 'tag',
+ tagType: 'inf'
+ };
+ if (match[1]) {
+ event.duration = parseFloat(match[1]);
+ }
+ if (match[2]) {
+ event.title = match[2];
+ }
+ this.trigger('data', event);
+ return;
+ }
+ match = /^#EXT-X-TARGETDURATION:([0-9.]*)?/.exec(newLine);
+ if (match) {
+ event = {
+ type: 'tag',
+ tagType: 'targetduration'
+ };
+ if (match[1]) {
+ event.duration = parseInt(match[1], 10);
+ }
+ this.trigger('data', event);
+ return;
+ }
+ match = /^#EXT-X-VERSION:([0-9.]*)?/.exec(newLine);
+ if (match) {
+ event = {
+ type: 'tag',
+ tagType: 'version'
+ };
+ if (match[1]) {
+ event.version = parseInt(match[1], 10);
+ }
+ this.trigger('data', event);
+ return;
+ }
+ match = /^#EXT-X-MEDIA-SEQUENCE:(\-?[0-9.]*)?/.exec(newLine);
+ if (match) {
+ event = {
+ type: 'tag',
+ tagType: 'media-sequence'
+ };
+ if (match[1]) {
+ event.number = parseInt(match[1], 10);
+ }
+ this.trigger('data', event);
+ return;
+ }
+ match = /^#EXT-X-DISCONTINUITY-SEQUENCE:(\-?[0-9.]*)?/.exec(newLine);
+ if (match) {
+ event = {
+ type: 'tag',
+ tagType: 'discontinuity-sequence'
+ };
+ if (match[1]) {
+ event.number = parseInt(match[1], 10);
+ }
+ this.trigger('data', event);
+ return;
+ }
+ match = /^#EXT-X-PLAYLIST-TYPE:(.*)?$/.exec(newLine);
+ if (match) {
+ event = {
+ type: 'tag',
+ tagType: 'playlist-type'
+ };
+ if (match[1]) {
+ event.playlistType = match[1];
+ }
+ this.trigger('data', event);
+ return;
+ }
+ match = /^#EXT-X-BYTERANGE:(.*)?$/.exec(newLine);
+ if (match) {
+ event = _extends$1(parseByterange(match[1]), {
+ type: 'tag',
+ tagType: 'byterange'
+ });
+ this.trigger('data', event);
+ return;
+ }
+ match = /^#EXT-X-ALLOW-CACHE:(YES|NO)?/.exec(newLine);
+ if (match) {
+ event = {
+ type: 'tag',
+ tagType: 'allow-cache'
+ };
+ if (match[1]) {
+ event.allowed = !/NO/.test(match[1]);
+ }
+ this.trigger('data', event);
+ return;
+ }
+ match = /^#EXT-X-MAP:(.*)$/.exec(newLine);
+ if (match) {
+ event = {
+ type: 'tag',
+ tagType: 'map'
+ };
+ if (match[1]) {
+ const attributes = parseAttributes$1(match[1]);
+ if (attributes.URI) {
+ event.uri = attributes.URI;
+ }
+ if (attributes.BYTERANGE) {
+ event.byterange = parseByterange(attributes.BYTERANGE);
+ }
+ }
+ this.trigger('data', event);
+ return;
+ }
+ match = /^#EXT-X-STREAM-INF:(.*)$/.exec(newLine);
+ if (match) {
+ event = {
+ type: 'tag',
+ tagType: 'stream-inf'
+ };
+ if (match[1]) {
+ event.attributes = parseAttributes$1(match[1]);
+ if (event.attributes.RESOLUTION) {
+ const split = event.attributes.RESOLUTION.split('x');
+ const resolution = {};
+ if (split[0]) {
+ resolution.width = parseInt(split[0], 10);
+ }
+ if (split[1]) {
+ resolution.height = parseInt(split[1], 10);
+ }
+ event.attributes.RESOLUTION = resolution;
+ }
+ if (event.attributes.BANDWIDTH) {
+ event.attributes.BANDWIDTH = parseInt(event.attributes.BANDWIDTH, 10);
+ }
+ if (event.attributes['FRAME-RATE']) {
+ event.attributes['FRAME-RATE'] = parseFloat(event.attributes['FRAME-RATE']);
+ }
+ if (event.attributes['PROGRAM-ID']) {
+ event.attributes['PROGRAM-ID'] = parseInt(event.attributes['PROGRAM-ID'], 10);
+ }
+ }
+ this.trigger('data', event);
+ return;
+ }
+ match = /^#EXT-X-MEDIA:(.*)$/.exec(newLine);
+ if (match) {
+ event = {
+ type: 'tag',
+ tagType: 'media'
+ };
+ if (match[1]) {
+ event.attributes = parseAttributes$1(match[1]);
+ }
+ this.trigger('data', event);
+ return;
+ }
+ match = /^#EXT-X-ENDLIST/.exec(newLine);
+ if (match) {
+ this.trigger('data', {
+ type: 'tag',
+ tagType: 'endlist'
+ });
+ return;
+ }
+ match = /^#EXT-X-DISCONTINUITY/.exec(newLine);
+ if (match) {
+ this.trigger('data', {
+ type: 'tag',
+ tagType: 'discontinuity'
+ });
+ return;
+ }
+ match = /^#EXT-X-PROGRAM-DATE-TIME:(.*)$/.exec(newLine);
+ if (match) {
+ event = {
+ type: 'tag',
+ tagType: 'program-date-time'
+ };
+ if (match[1]) {
+ event.dateTimeString = match[1];
+ event.dateTimeObject = new Date(match[1]);
+ }
+ this.trigger('data', event);
+ return;
+ }
+ match = /^#EXT-X-KEY:(.*)$/.exec(newLine);
+ if (match) {
+ event = {
+ type: 'tag',
+ tagType: 'key'
+ };
+ if (match[1]) {
+ event.attributes = parseAttributes$1(match[1]); // parse the IV string into a Uint32Array
+
+ if (event.attributes.IV) {
+ if (event.attributes.IV.substring(0, 2).toLowerCase() === '0x') {
+ event.attributes.IV = event.attributes.IV.substring(2);
+ }
+ event.attributes.IV = event.attributes.IV.match(/.{8}/g);
+ event.attributes.IV[0] = parseInt(event.attributes.IV[0], 16);
+ event.attributes.IV[1] = parseInt(event.attributes.IV[1], 16);
+ event.attributes.IV[2] = parseInt(event.attributes.IV[2], 16);
+ event.attributes.IV[3] = parseInt(event.attributes.IV[3], 16);
+ event.attributes.IV = new Uint32Array(event.attributes.IV);
+ }
+ }
+ this.trigger('data', event);
+ return;
+ }
+ match = /^#EXT-X-START:(.*)$/.exec(newLine);
+ if (match) {
+ event = {
+ type: 'tag',
+ tagType: 'start'
+ };
+ if (match[1]) {
+ event.attributes = parseAttributes$1(match[1]);
+ event.attributes['TIME-OFFSET'] = parseFloat(event.attributes['TIME-OFFSET']);
+ event.attributes.PRECISE = /YES/.test(event.attributes.PRECISE);
+ }
+ this.trigger('data', event);
+ return;
+ }
+ match = /^#EXT-X-CUE-OUT-CONT:(.*)?$/.exec(newLine);
+ if (match) {
+ event = {
+ type: 'tag',
+ tagType: 'cue-out-cont'
+ };
+ if (match[1]) {
+ event.data = match[1];
+ } else {
+ event.data = '';
+ }
+ this.trigger('data', event);
+ return;
+ }
+ match = /^#EXT-X-CUE-OUT:(.*)?$/.exec(newLine);
+ if (match) {
+ event = {
+ type: 'tag',
+ tagType: 'cue-out'
+ };
+ if (match[1]) {
+ event.data = match[1];
+ } else {
+ event.data = '';
+ }
+ this.trigger('data', event);
+ return;
+ }
+ match = /^#EXT-X-CUE-IN:(.*)?$/.exec(newLine);
+ if (match) {
+ event = {
+ type: 'tag',
+ tagType: 'cue-in'
+ };
+ if (match[1]) {
+ event.data = match[1];
+ } else {
+ event.data = '';
+ }
+ this.trigger('data', event);
+ return;
+ }
+ match = /^#EXT-X-SKIP:(.*)$/.exec(newLine);
+ if (match && match[1]) {
+ event = {
+ type: 'tag',
+ tagType: 'skip'
+ };
+ event.attributes = parseAttributes$1(match[1]);
+ if (event.attributes.hasOwnProperty('SKIPPED-SEGMENTS')) {
+ event.attributes['SKIPPED-SEGMENTS'] = parseInt(event.attributes['SKIPPED-SEGMENTS'], 10);
+ }
+ if (event.attributes.hasOwnProperty('RECENTLY-REMOVED-DATERANGES')) {
+ event.attributes['RECENTLY-REMOVED-DATERANGES'] = event.attributes['RECENTLY-REMOVED-DATERANGES'].split(TAB);
+ }
+ this.trigger('data', event);
+ return;
+ }
+ match = /^#EXT-X-PART:(.*)$/.exec(newLine);
+ if (match && match[1]) {
+ event = {
+ type: 'tag',
+ tagType: 'part'
+ };
+ event.attributes = parseAttributes$1(match[1]);
+ ['DURATION'].forEach(function (key) {
+ if (event.attributes.hasOwnProperty(key)) {
+ event.attributes[key] = parseFloat(event.attributes[key]);
+ }
+ });
+ ['INDEPENDENT', 'GAP'].forEach(function (key) {
+ if (event.attributes.hasOwnProperty(key)) {
+ event.attributes[key] = /YES/.test(event.attributes[key]);
+ }
+ });
+ if (event.attributes.hasOwnProperty('BYTERANGE')) {
+ event.attributes.byterange = parseByterange(event.attributes.BYTERANGE);
+ }
+ this.trigger('data', event);
+ return;
+ }
+ match = /^#EXT-X-SERVER-CONTROL:(.*)$/.exec(newLine);
+ if (match && match[1]) {
+ event = {
+ type: 'tag',
+ tagType: 'server-control'
+ };
+ event.attributes = parseAttributes$1(match[1]);
+ ['CAN-SKIP-UNTIL', 'PART-HOLD-BACK', 'HOLD-BACK'].forEach(function (key) {
+ if (event.attributes.hasOwnProperty(key)) {
+ event.attributes[key] = parseFloat(event.attributes[key]);
+ }
+ });
+ ['CAN-SKIP-DATERANGES', 'CAN-BLOCK-RELOAD'].forEach(function (key) {
+ if (event.attributes.hasOwnProperty(key)) {
+ event.attributes[key] = /YES/.test(event.attributes[key]);
+ }
+ });
+ this.trigger('data', event);
+ return;
+ }
+ match = /^#EXT-X-PART-INF:(.*)$/.exec(newLine);
+ if (match && match[1]) {
+ event = {
+ type: 'tag',
+ tagType: 'part-inf'
+ };
+ event.attributes = parseAttributes$1(match[1]);
+ ['PART-TARGET'].forEach(function (key) {
+ if (event.attributes.hasOwnProperty(key)) {
+ event.attributes[key] = parseFloat(event.attributes[key]);
+ }
+ });
+ this.trigger('data', event);
+ return;
+ }
+ match = /^#EXT-X-PRELOAD-HINT:(.*)$/.exec(newLine);
+ if (match && match[1]) {
+ event = {
+ type: 'tag',
+ tagType: 'preload-hint'
+ };
+ event.attributes = parseAttributes$1(match[1]);
+ ['BYTERANGE-START', 'BYTERANGE-LENGTH'].forEach(function (key) {
+ if (event.attributes.hasOwnProperty(key)) {
+ event.attributes[key] = parseInt(event.attributes[key], 10);
+ const subkey = key === 'BYTERANGE-LENGTH' ? 'length' : 'offset';
+ event.attributes.byterange = event.attributes.byterange || {};
+ event.attributes.byterange[subkey] = event.attributes[key]; // only keep the parsed byterange object.
+
+ delete event.attributes[key];
+ }
+ });
+ this.trigger('data', event);
+ return;
+ }
+ match = /^#EXT-X-RENDITION-REPORT:(.*)$/.exec(newLine);
+ if (match && match[1]) {
+ event = {
+ type: 'tag',
+ tagType: 'rendition-report'
+ };
+ event.attributes = parseAttributes$1(match[1]);
+ ['LAST-MSN', 'LAST-PART'].forEach(function (key) {
+ if (event.attributes.hasOwnProperty(key)) {
+ event.attributes[key] = parseInt(event.attributes[key], 10);
+ }
+ });
+ this.trigger('data', event);
+ return;
+ }
+ match = /^#EXT-X-DATERANGE:(.*)$/.exec(newLine);
+ if (match && match[1]) {
+ event = {
+ type: 'tag',
+ tagType: 'daterange'
+ };
+ event.attributes = parseAttributes$1(match[1]);
+ ['ID', 'CLASS'].forEach(function (key) {
+ if (event.attributes.hasOwnProperty(key)) {
+ event.attributes[key] = String(event.attributes[key]);
+ }
+ });
+ ['START-DATE', 'END-DATE'].forEach(function (key) {
+ if (event.attributes.hasOwnProperty(key)) {
+ event.attributes[key] = new Date(event.attributes[key]);
+ }
+ });
+ ['DURATION', 'PLANNED-DURATION'].forEach(function (key) {
+ if (event.attributes.hasOwnProperty(key)) {
+ event.attributes[key] = parseFloat(event.attributes[key]);
+ }
+ });
+ ['END-ON-NEXT'].forEach(function (key) {
+ if (event.attributes.hasOwnProperty(key)) {
+ event.attributes[key] = /YES/i.test(event.attributes[key]);
+ }
+ });
+ ['SCTE35-CMD', ' SCTE35-OUT', 'SCTE35-IN'].forEach(function (key) {
+ if (event.attributes.hasOwnProperty(key)) {
+ event.attributes[key] = event.attributes[key].toString(16);
+ }
+ });
+ const clientAttributePattern = /^X-([A-Z]+-)+[A-Z]+$/;
+ for (const key in event.attributes) {
+ if (!clientAttributePattern.test(key)) {
+ continue;
+ }
+ const isHexaDecimal = /[0-9A-Fa-f]{6}/g.test(event.attributes[key]);
+ const isDecimalFloating = /^\d+(\.\d+)?$/.test(event.attributes[key]);
+ event.attributes[key] = isHexaDecimal ? event.attributes[key].toString(16) : isDecimalFloating ? parseFloat(event.attributes[key]) : String(event.attributes[key]);
+ }
+ this.trigger('data', event);
+ return;
+ }
+ match = /^#EXT-X-INDEPENDENT-SEGMENTS/.exec(newLine);
+ if (match) {
+ this.trigger('data', {
+ type: 'tag',
+ tagType: 'independent-segments'
+ });
+ return;
+ }
+ match = /^#EXT-X-CONTENT-STEERING:(.*)$/.exec(newLine);
+ if (match) {
+ event = {
+ type: 'tag',
+ tagType: 'content-steering'
+ };
+ event.attributes = parseAttributes$1(match[1]);
+ this.trigger('data', event);
+ return;
+ } // unknown tag type
+
+ this.trigger('data', {
+ type: 'tag',
+ data: newLine.slice(4)
+ });
+ });
+ }
+ /**
+ * Add a parser for custom headers
+ *
+ * @param {Object} options a map of options for the added parser
+ * @param {RegExp} options.expression a regular expression to match the custom header
+ * @param {string} options.customType the custom type to register to the output
+ * @param {Function} [options.dataParser] function to parse the line into an object
+ * @param {boolean} [options.segment] should tag data be attached to the segment object
+ */
+
+ addParser({
+ expression,
+ customType,
+ dataParser,
+ segment
+ }) {
+ if (typeof dataParser !== 'function') {
+ dataParser = line => line;
+ }
+ this.customParsers.push(line => {
+ const match = expression.exec(line);
+ if (match) {
+ this.trigger('data', {
+ type: 'custom',
+ data: dataParser(line),
+ customType,
+ segment
+ });
+ return true;
+ }
+ });
+ }
+ /**
+ * Add a custom header mapper
+ *
+ * @param {Object} options
+ * @param {RegExp} options.expression a regular expression to match the custom header
+ * @param {Function} options.map function to translate tag into a different tag
+ */
+
+ addTagMapper({
+ expression,
+ map
+ }) {
+ const mapFn = line => {
+ if (expression.test(line)) {
+ return map(line);
+ }
+ return line;
+ };
+ this.tagMappers.push(mapFn);
+ }
+ }
+ const camelCase = str => str.toLowerCase().replace(/-(\w)/g, a => a[1].toUpperCase());
+ const camelCaseKeys = function (attributes) {
+ const result = {};
+ Object.keys(attributes).forEach(function (key) {
+ result[camelCase(key)] = attributes[key];
+ });
+ return result;
+ }; // set SERVER-CONTROL hold back based upon targetDuration and partTargetDuration
+ // we need this helper because defaults are based upon targetDuration and
+ // partTargetDuration being set, but they may not be if SERVER-CONTROL appears before
+ // target durations are set.
+
+ const setHoldBack = function (manifest) {
+ const {
+ serverControl,
+ targetDuration,
+ partTargetDuration
+ } = manifest;
+ if (!serverControl) {
+ return;
+ }
+ const tag = '#EXT-X-SERVER-CONTROL';
+ const hb = 'holdBack';
+ const phb = 'partHoldBack';
+ const minTargetDuration = targetDuration && targetDuration * 3;
+ const minPartDuration = partTargetDuration && partTargetDuration * 2;
+ if (targetDuration && !serverControl.hasOwnProperty(hb)) {
+ serverControl[hb] = minTargetDuration;
+ this.trigger('info', {
+ message: `${tag} defaulting HOLD-BACK to targetDuration * 3 (${minTargetDuration}).`
+ });
+ }
+ if (minTargetDuration && serverControl[hb] < minTargetDuration) {
+ this.trigger('warn', {
+ message: `${tag} clamping HOLD-BACK (${serverControl[hb]}) to targetDuration * 3 (${minTargetDuration})`
+ });
+ serverControl[hb] = minTargetDuration;
+ } // default no part hold back to part target duration * 3
+
+ if (partTargetDuration && !serverControl.hasOwnProperty(phb)) {
+ serverControl[phb] = partTargetDuration * 3;
+ this.trigger('info', {
+ message: `${tag} defaulting PART-HOLD-BACK to partTargetDuration * 3 (${serverControl[phb]}).`
+ });
+ } // if part hold back is too small default it to part target duration * 2
+
+ if (partTargetDuration && serverControl[phb] < minPartDuration) {
+ this.trigger('warn', {
+ message: `${tag} clamping PART-HOLD-BACK (${serverControl[phb]}) to partTargetDuration * 2 (${minPartDuration}).`
+ });
+ serverControl[phb] = minPartDuration;
+ }
+ };
+ /**
+ * A parser for M3U8 files. The current interpretation of the input is
+ * exposed as a property `manifest` on parser objects. It's just two lines to
+ * create and parse a manifest once you have the contents available as a string:
+ *
+ * ```js
+ * var parser = new m3u8.Parser();
+ * parser.push(xhr.responseText);
+ * ```
+ *
+ * New input can later be applied to update the manifest object by calling
+ * `push` again.
+ *
+ * The parser attempts to create a usable manifest object even if the
+ * underlying input is somewhat nonsensical. It emits `info` and `warning`
+ * events during the parse if it encounters input that seems invalid or
+ * requires some property of the manifest object to be defaulted.
+ *
+ * @class Parser
+ * @extends Stream
+ */
+
+ class Parser extends Stream {
+ constructor() {
+ super();
+ this.lineStream = new LineStream();
+ this.parseStream = new ParseStream();
+ this.lineStream.pipe(this.parseStream);
+ this.lastProgramDateTime = null;
+ /* eslint-disable consistent-this */
+
+ const self = this;
+ /* eslint-enable consistent-this */
+
+ const uris = [];
+ let currentUri = {}; // if specified, the active EXT-X-MAP definition
+
+ let currentMap; // if specified, the active decryption key
+
+ let key;
+ let hasParts = false;
+ const noop = function () {};
+ const defaultMediaGroups = {
+ 'AUDIO': {},
+ 'VIDEO': {},
+ 'CLOSED-CAPTIONS': {},
+ 'SUBTITLES': {}
+ }; // This is the Widevine UUID from DASH IF IOP. The same exact string is
+ // used in MPDs with Widevine encrypted streams.
+
+ const widevineUuid = 'urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed'; // group segments into numbered timelines delineated by discontinuities
+
+ let currentTimeline = 0; // the manifest is empty until the parse stream begins delivering data
+
+ this.manifest = {
+ allowCache: true,
+ discontinuityStarts: [],
+ dateRanges: [],
+ segments: []
+ }; // keep track of the last seen segment's byte range end, as segments are not required
+ // to provide the offset, in which case it defaults to the next byte after the
+ // previous segment
+
+ let lastByterangeEnd = 0; // keep track of the last seen part's byte range end.
+
+ let lastPartByterangeEnd = 0;
+ const dateRangeTags = {};
+ this.on('end', () => {
+ // only add preloadSegment if we don't yet have a uri for it.
+ // and we actually have parts/preloadHints
+ if (currentUri.uri || !currentUri.parts && !currentUri.preloadHints) {
+ return;
+ }
+ if (!currentUri.map && currentMap) {
+ currentUri.map = currentMap;
+ }
+ if (!currentUri.key && key) {
+ currentUri.key = key;
+ }
+ if (!currentUri.timeline && typeof currentTimeline === 'number') {
+ currentUri.timeline = currentTimeline;
+ }
+ this.manifest.preloadSegment = currentUri;
+ }); // update the manifest with the m3u8 entry from the parse stream
+
+ this.parseStream.on('data', function (entry) {
+ let mediaGroup;
+ let rendition;
+ ({
+ tag() {
+ // switch based on the tag type
+ (({
+ version() {
+ if (entry.version) {
+ this.manifest.version = entry.version;
+ }
+ },
+ 'allow-cache'() {
+ this.manifest.allowCache = entry.allowed;
+ if (!('allowed' in entry)) {
+ this.trigger('info', {
+ message: 'defaulting allowCache to YES'
+ });
+ this.manifest.allowCache = true;
+ }
+ },
+ byterange() {
+ const byterange = {};
+ if ('length' in entry) {
+ currentUri.byterange = byterange;
+ byterange.length = entry.length;
+ if (!('offset' in entry)) {
+ /*
+ * From the latest spec (as of this writing):
+ * https://tools.ietf.org/html/draft-pantos-http-live-streaming-23#section-4.3.2.2
+ *
+ * Same text since EXT-X-BYTERANGE's introduction in draft 7:
+ * https://tools.ietf.org/html/draft-pantos-http-live-streaming-07#section-3.3.1)
+ *
+ * "If o [offset] is not present, the sub-range begins at the next byte
+ * following the sub-range of the previous media segment."
+ */
+ entry.offset = lastByterangeEnd;
+ }
+ }
+ if ('offset' in entry) {
+ currentUri.byterange = byterange;
+ byterange.offset = entry.offset;
+ }
+ lastByterangeEnd = byterange.offset + byterange.length;
+ },
+ endlist() {
+ this.manifest.endList = true;
+ },
+ inf() {
+ if (!('mediaSequence' in this.manifest)) {
+ this.manifest.mediaSequence = 0;
+ this.trigger('info', {
+ message: 'defaulting media sequence to zero'
+ });
+ }
+ if (!('discontinuitySequence' in this.manifest)) {
+ this.manifest.discontinuitySequence = 0;
+ this.trigger('info', {
+ message: 'defaulting discontinuity sequence to zero'
+ });
+ }
+ if (entry.title) {
+ currentUri.title = entry.title;
+ }
+ if (entry.duration > 0) {
+ currentUri.duration = entry.duration;
+ }
+ if (entry.duration === 0) {
+ currentUri.duration = 0.01;
+ this.trigger('info', {
+ message: 'updating zero segment duration to a small value'
+ });
+ }
+ this.manifest.segments = uris;
+ },
+ key() {
+ if (!entry.attributes) {
+ this.trigger('warn', {
+ message: 'ignoring key declaration without attribute list'
+ });
+ return;
+ } // clear the active encryption key
+
+ if (entry.attributes.METHOD === 'NONE') {
+ key = null;
+ return;
+ }
+ if (!entry.attributes.URI) {
+ this.trigger('warn', {
+ message: 'ignoring key declaration without URI'
+ });
+ return;
+ }
+ if (entry.attributes.KEYFORMAT === 'com.apple.streamingkeydelivery') {
+ this.manifest.contentProtection = this.manifest.contentProtection || {}; // TODO: add full support for this.
+
+ this.manifest.contentProtection['com.apple.fps.1_0'] = {
+ attributes: entry.attributes
+ };
+ return;
+ }
+ if (entry.attributes.KEYFORMAT === 'com.microsoft.playready') {
+ this.manifest.contentProtection = this.manifest.contentProtection || {}; // TODO: add full support for this.
+
+ this.manifest.contentProtection['com.microsoft.playready'] = {
+ uri: entry.attributes.URI
+ };
+ return;
+ } // check if the content is encrypted for Widevine
+ // Widevine/HLS spec: https://storage.googleapis.com/wvdocs/Widevine_DRM_HLS.pdf
+
+ if (entry.attributes.KEYFORMAT === widevineUuid) {
+ const VALID_METHODS = ['SAMPLE-AES', 'SAMPLE-AES-CTR', 'SAMPLE-AES-CENC'];
+ if (VALID_METHODS.indexOf(entry.attributes.METHOD) === -1) {
+ this.trigger('warn', {
+ message: 'invalid key method provided for Widevine'
+ });
+ return;
+ }
+ if (entry.attributes.METHOD === 'SAMPLE-AES-CENC') {
+ this.trigger('warn', {
+ message: 'SAMPLE-AES-CENC is deprecated, please use SAMPLE-AES-CTR instead'
+ });
+ }
+ if (entry.attributes.URI.substring(0, 23) !== 'data:text/plain;base64,') {
+ this.trigger('warn', {
+ message: 'invalid key URI provided for Widevine'
+ });
+ return;
+ }
+ if (!(entry.attributes.KEYID && entry.attributes.KEYID.substring(0, 2) === '0x')) {
+ this.trigger('warn', {
+ message: 'invalid key ID provided for Widevine'
+ });
+ return;
+ } // if Widevine key attributes are valid, store them as `contentProtection`
+ // on the manifest to emulate Widevine tag structure in a DASH mpd
+
+ this.manifest.contentProtection = this.manifest.contentProtection || {};
+ this.manifest.contentProtection['com.widevine.alpha'] = {
+ attributes: {
+ schemeIdUri: entry.attributes.KEYFORMAT,
+ // remove '0x' from the key id string
+ keyId: entry.attributes.KEYID.substring(2)
+ },
+ // decode the base64-encoded PSSH box
+ pssh: decodeB64ToUint8Array$1(entry.attributes.URI.split(',')[1])
+ };
+ return;
+ }
+ if (!entry.attributes.METHOD) {
+ this.trigger('warn', {
+ message: 'defaulting key method to AES-128'
+ });
+ } // setup an encryption key for upcoming segments
+
+ key = {
+ method: entry.attributes.METHOD || 'AES-128',
+ uri: entry.attributes.URI
+ };
+ if (typeof entry.attributes.IV !== 'undefined') {
+ key.iv = entry.attributes.IV;
+ }
+ },
+ 'media-sequence'() {
+ if (!isFinite(entry.number)) {
+ this.trigger('warn', {
+ message: 'ignoring invalid media sequence: ' + entry.number
+ });
+ return;
+ }
+ this.manifest.mediaSequence = entry.number;
+ },
+ 'discontinuity-sequence'() {
+ if (!isFinite(entry.number)) {
+ this.trigger('warn', {
+ message: 'ignoring invalid discontinuity sequence: ' + entry.number
+ });
+ return;
+ }
+ this.manifest.discontinuitySequence = entry.number;
+ currentTimeline = entry.number;
+ },
+ 'playlist-type'() {
+ if (!/VOD|EVENT/.test(entry.playlistType)) {
+ this.trigger('warn', {
+ message: 'ignoring unknown playlist type: ' + entry.playlist
+ });
+ return;
+ }
+ this.manifest.playlistType = entry.playlistType;
+ },
+ map() {
+ currentMap = {};
+ if (entry.uri) {
+ currentMap.uri = entry.uri;
+ }
+ if (entry.byterange) {
+ currentMap.byterange = entry.byterange;
+ }
+ if (key) {
+ currentMap.key = key;
+ }
+ },
+ 'stream-inf'() {
+ this.manifest.playlists = uris;
+ this.manifest.mediaGroups = this.manifest.mediaGroups || defaultMediaGroups;
+ if (!entry.attributes) {
+ this.trigger('warn', {
+ message: 'ignoring empty stream-inf attributes'
+ });
+ return;
+ }
+ if (!currentUri.attributes) {
+ currentUri.attributes = {};
+ }
+ _extends$1(currentUri.attributes, entry.attributes);
+ },
+ media() {
+ this.manifest.mediaGroups = this.manifest.mediaGroups || defaultMediaGroups;
+ if (!(entry.attributes && entry.attributes.TYPE && entry.attributes['GROUP-ID'] && entry.attributes.NAME)) {
+ this.trigger('warn', {
+ message: 'ignoring incomplete or missing media group'
+ });
+ return;
+ } // find the media group, creating defaults as necessary
+
+ const mediaGroupType = this.manifest.mediaGroups[entry.attributes.TYPE];
+ mediaGroupType[entry.attributes['GROUP-ID']] = mediaGroupType[entry.attributes['GROUP-ID']] || {};
+ mediaGroup = mediaGroupType[entry.attributes['GROUP-ID']]; // collect the rendition metadata
+
+ rendition = {
+ default: /yes/i.test(entry.attributes.DEFAULT)
+ };
+ if (rendition.default) {
+ rendition.autoselect = true;
+ } else {
+ rendition.autoselect = /yes/i.test(entry.attributes.AUTOSELECT);
+ }
+ if (entry.attributes.LANGUAGE) {
+ rendition.language = entry.attributes.LANGUAGE;
+ }
+ if (entry.attributes.URI) {
+ rendition.uri = entry.attributes.URI;
+ }
+ if (entry.attributes['INSTREAM-ID']) {
+ rendition.instreamId = entry.attributes['INSTREAM-ID'];
+ }
+ if (entry.attributes.CHARACTERISTICS) {
+ rendition.characteristics = entry.attributes.CHARACTERISTICS;
+ }
+ if (entry.attributes.FORCED) {
+ rendition.forced = /yes/i.test(entry.attributes.FORCED);
+ } // insert the new rendition
+
+ mediaGroup[entry.attributes.NAME] = rendition;
+ },
+ discontinuity() {
+ currentTimeline += 1;
+ currentUri.discontinuity = true;
+ this.manifest.discontinuityStarts.push(uris.length);
+ },
+ 'program-date-time'() {
+ if (typeof this.manifest.dateTimeString === 'undefined') {
+ // PROGRAM-DATE-TIME is a media-segment tag, but for backwards
+ // compatibility, we add the first occurence of the PROGRAM-DATE-TIME tag
+ // to the manifest object
+ // TODO: Consider removing this in future major version
+ this.manifest.dateTimeString = entry.dateTimeString;
+ this.manifest.dateTimeObject = entry.dateTimeObject;
+ }
+ currentUri.dateTimeString = entry.dateTimeString;
+ currentUri.dateTimeObject = entry.dateTimeObject;
+ const {
+ lastProgramDateTime
+ } = this;
+ this.lastProgramDateTime = new Date(entry.dateTimeString).getTime(); // We should extrapolate Program Date Time backward only during first program date time occurrence.
+ // Once we have at least one program date time point, we can always extrapolate it forward using lastProgramDateTime reference.
+
+ if (lastProgramDateTime === null) {
+ // Extrapolate Program Date Time backward
+ // Since it is first program date time occurrence we're assuming that
+ // all this.manifest.segments have no program date time info
+ this.manifest.segments.reduceRight((programDateTime, segment) => {
+ segment.programDateTime = programDateTime - segment.duration * 1000;
+ return segment.programDateTime;
+ }, this.lastProgramDateTime);
+ }
+ },
+ targetduration() {
+ if (!isFinite(entry.duration) || entry.duration < 0) {
+ this.trigger('warn', {
+ message: 'ignoring invalid target duration: ' + entry.duration
+ });
+ return;
+ }
+ this.manifest.targetDuration = entry.duration;
+ setHoldBack.call(this, this.manifest);
+ },
+ start() {
+ if (!entry.attributes || isNaN(entry.attributes['TIME-OFFSET'])) {
+ this.trigger('warn', {
+ message: 'ignoring start declaration without appropriate attribute list'
+ });
+ return;
+ }
+ this.manifest.start = {
+ timeOffset: entry.attributes['TIME-OFFSET'],
+ precise: entry.attributes.PRECISE
+ };
+ },
+ 'cue-out'() {
+ currentUri.cueOut = entry.data;
+ },
+ 'cue-out-cont'() {
+ currentUri.cueOutCont = entry.data;
+ },
+ 'cue-in'() {
+ currentUri.cueIn = entry.data;
+ },
+ 'skip'() {
+ this.manifest.skip = camelCaseKeys(entry.attributes);
+ this.warnOnMissingAttributes_('#EXT-X-SKIP', entry.attributes, ['SKIPPED-SEGMENTS']);
+ },
+ 'part'() {
+ hasParts = true; // parts are always specifed before a segment
+
+ const segmentIndex = this.manifest.segments.length;
+ const part = camelCaseKeys(entry.attributes);
+ currentUri.parts = currentUri.parts || [];
+ currentUri.parts.push(part);
+ if (part.byterange) {
+ if (!part.byterange.hasOwnProperty('offset')) {
+ part.byterange.offset = lastPartByterangeEnd;
+ }
+ lastPartByterangeEnd = part.byterange.offset + part.byterange.length;
+ }
+ const partIndex = currentUri.parts.length - 1;
+ this.warnOnMissingAttributes_(`#EXT-X-PART #${partIndex} for segment #${segmentIndex}`, entry.attributes, ['URI', 'DURATION']);
+ if (this.manifest.renditionReports) {
+ this.manifest.renditionReports.forEach((r, i) => {
+ if (!r.hasOwnProperty('lastPart')) {
+ this.trigger('warn', {
+ message: `#EXT-X-RENDITION-REPORT #${i} lacks required attribute(s): LAST-PART`
+ });
+ }
+ });
+ }
+ },
+ 'server-control'() {
+ const attrs = this.manifest.serverControl = camelCaseKeys(entry.attributes);
+ if (!attrs.hasOwnProperty('canBlockReload')) {
+ attrs.canBlockReload = false;
+ this.trigger('info', {
+ message: '#EXT-X-SERVER-CONTROL defaulting CAN-BLOCK-RELOAD to false'
+ });
+ }
+ setHoldBack.call(this, this.manifest);
+ if (attrs.canSkipDateranges && !attrs.hasOwnProperty('canSkipUntil')) {
+ this.trigger('warn', {
+ message: '#EXT-X-SERVER-CONTROL lacks required attribute CAN-SKIP-UNTIL which is required when CAN-SKIP-DATERANGES is set'
+ });
+ }
+ },
+ 'preload-hint'() {
+ // parts are always specifed before a segment
+ const segmentIndex = this.manifest.segments.length;
+ const hint = camelCaseKeys(entry.attributes);
+ const isPart = hint.type && hint.type === 'PART';
+ currentUri.preloadHints = currentUri.preloadHints || [];
+ currentUri.preloadHints.push(hint);
+ if (hint.byterange) {
+ if (!hint.byterange.hasOwnProperty('offset')) {
+ // use last part byterange end or zero if not a part.
+ hint.byterange.offset = isPart ? lastPartByterangeEnd : 0;
+ if (isPart) {
+ lastPartByterangeEnd = hint.byterange.offset + hint.byterange.length;
+ }
+ }
+ }
+ const index = currentUri.preloadHints.length - 1;
+ this.warnOnMissingAttributes_(`#EXT-X-PRELOAD-HINT #${index} for segment #${segmentIndex}`, entry.attributes, ['TYPE', 'URI']);
+ if (!hint.type) {
+ return;
+ } // search through all preload hints except for the current one for
+ // a duplicate type.
+
+ for (let i = 0; i < currentUri.preloadHints.length - 1; i++) {
+ const otherHint = currentUri.preloadHints[i];
+ if (!otherHint.type) {
+ continue;
+ }
+ if (otherHint.type === hint.type) {
+ this.trigger('warn', {
+ message: `#EXT-X-PRELOAD-HINT #${index} for segment #${segmentIndex} has the same TYPE ${hint.type} as preload hint #${i}`
+ });
+ }
+ }
+ },
+ 'rendition-report'() {
+ const report = camelCaseKeys(entry.attributes);
+ this.manifest.renditionReports = this.manifest.renditionReports || [];
+ this.manifest.renditionReports.push(report);
+ const index = this.manifest.renditionReports.length - 1;
+ const required = ['LAST-MSN', 'URI'];
+ if (hasParts) {
+ required.push('LAST-PART');
+ }
+ this.warnOnMissingAttributes_(`#EXT-X-RENDITION-REPORT #${index}`, entry.attributes, required);
+ },
+ 'part-inf'() {
+ this.manifest.partInf = camelCaseKeys(entry.attributes);
+ this.warnOnMissingAttributes_('#EXT-X-PART-INF', entry.attributes, ['PART-TARGET']);
+ if (this.manifest.partInf.partTarget) {
+ this.manifest.partTargetDuration = this.manifest.partInf.partTarget;
+ }
+ setHoldBack.call(this, this.manifest);
+ },
+ 'daterange'() {
+ this.manifest.dateRanges.push(camelCaseKeys(entry.attributes));
+ const index = this.manifest.dateRanges.length - 1;
+ this.warnOnMissingAttributes_(`#EXT-X-DATERANGE #${index}`, entry.attributes, ['ID', 'START-DATE']);
+ const dateRange = this.manifest.dateRanges[index];
+ if (dateRange.endDate && dateRange.startDate && new Date(dateRange.endDate) < new Date(dateRange.startDate)) {
+ this.trigger('warn', {
+ message: 'EXT-X-DATERANGE END-DATE must be equal to or later than the value of the START-DATE'
+ });
+ }
+ if (dateRange.duration && dateRange.duration < 0) {
+ this.trigger('warn', {
+ message: 'EXT-X-DATERANGE DURATION must not be negative'
+ });
+ }
+ if (dateRange.plannedDuration && dateRange.plannedDuration < 0) {
+ this.trigger('warn', {
+ message: 'EXT-X-DATERANGE PLANNED-DURATION must not be negative'
+ });
+ }
+ const endOnNextYes = !!dateRange.endOnNext;
+ if (endOnNextYes && !dateRange.class) {
+ this.trigger('warn', {
+ message: 'EXT-X-DATERANGE with an END-ON-NEXT=YES attribute must have a CLASS attribute'
+ });
+ }
+ if (endOnNextYes && (dateRange.duration || dateRange.endDate)) {
+ this.trigger('warn', {
+ message: 'EXT-X-DATERANGE with an END-ON-NEXT=YES attribute must not contain DURATION or END-DATE attributes'
+ });
+ }
+ if (dateRange.duration && dateRange.endDate) {
+ const startDate = dateRange.startDate;
+ const newDateInSeconds = startDate.getTime() + dateRange.duration * 1000;
+ this.manifest.dateRanges[index].endDate = new Date(newDateInSeconds);
+ }
+ if (!dateRangeTags[dateRange.id]) {
+ dateRangeTags[dateRange.id] = dateRange;
+ } else {
+ for (const attribute in dateRangeTags[dateRange.id]) {
+ if (!!dateRange[attribute] && JSON.stringify(dateRangeTags[dateRange.id][attribute]) !== JSON.stringify(dateRange[attribute])) {
+ this.trigger('warn', {
+ message: 'EXT-X-DATERANGE tags with the same ID in a playlist must have the same attributes values'
+ });
+ break;
+ }
+ } // if tags with the same ID do not have conflicting attributes, merge them
+
+ const dateRangeWithSameId = this.manifest.dateRanges.findIndex(dateRangeToFind => dateRangeToFind.id === dateRange.id);
+ this.manifest.dateRanges[dateRangeWithSameId] = _extends$1(this.manifest.dateRanges[dateRangeWithSameId], dateRange);
+ dateRangeTags[dateRange.id] = _extends$1(dateRangeTags[dateRange.id], dateRange); // after merging, delete the duplicate dateRange that was added last
+
+ this.manifest.dateRanges.pop();
+ }
+ },
+ 'independent-segments'() {
+ this.manifest.independentSegments = true;
+ },
+ 'content-steering'() {
+ this.manifest.contentSteering = camelCaseKeys(entry.attributes);
+ this.warnOnMissingAttributes_('#EXT-X-CONTENT-STEERING', entry.attributes, ['SERVER-URI']);
+ }
+ })[entry.tagType] || noop).call(self);
+ },
+ uri() {
+ currentUri.uri = entry.uri;
+ uris.push(currentUri); // if no explicit duration was declared, use the target duration
+
+ if (this.manifest.targetDuration && !('duration' in currentUri)) {
+ this.trigger('warn', {
+ message: 'defaulting segment duration to the target duration'
+ });
+ currentUri.duration = this.manifest.targetDuration;
+ } // annotate with encryption information, if necessary
+
+ if (key) {
+ currentUri.key = key;
+ }
+ currentUri.timeline = currentTimeline; // annotate with initialization segment information, if necessary
+
+ if (currentMap) {
+ currentUri.map = currentMap;
+ } // reset the last byterange end as it needs to be 0 between parts
+
+ lastPartByterangeEnd = 0; // Once we have at least one program date time we can always extrapolate it forward
+
+ if (this.lastProgramDateTime !== null) {
+ currentUri.programDateTime = this.lastProgramDateTime;
+ this.lastProgramDateTime += currentUri.duration * 1000;
+ } // prepare for the next URI
+
+ currentUri = {};
+ },
+ comment() {// comments are not important for playback
+ },
+ custom() {
+ // if this is segment-level data attach the output to the segment
+ if (entry.segment) {
+ currentUri.custom = currentUri.custom || {};
+ currentUri.custom[entry.customType] = entry.data; // if this is manifest-level data attach to the top level manifest object
+ } else {
+ this.manifest.custom = this.manifest.custom || {};
+ this.manifest.custom[entry.customType] = entry.data;
+ }
+ }
+ })[entry.type].call(self);
+ });
+ }
+ warnOnMissingAttributes_(identifier, attributes, required) {
+ const missing = [];
+ required.forEach(function (key) {
+ if (!attributes.hasOwnProperty(key)) {
+ missing.push(key);
+ }
+ });
+ if (missing.length) {
+ this.trigger('warn', {
+ message: `${identifier} lacks required attribute(s): ${missing.join(', ')}`
+ });
+ }
+ }
+ /**
+ * Parse the input string and update the manifest object.
+ *
+ * @param {string} chunk a potentially incomplete portion of the manifest
+ */
+
+ push(chunk) {
+ this.lineStream.push(chunk);
+ }
+ /**
+ * Flush any remaining input. This can be handy if the last line of an M3U8
+ * manifest did not contain a trailing newline but the file has been
+ * completely received.
+ */
+
+ end() {
+ // flush any buffered input
+ this.lineStream.push('\n');
+ if (this.manifest.dateRanges.length && this.lastProgramDateTime === null) {
+ this.trigger('warn', {
+ message: 'A playlist with EXT-X-DATERANGE tag must contain atleast one EXT-X-PROGRAM-DATE-TIME tag'
+ });
+ }
+ this.lastProgramDateTime = null;
+ this.trigger('end');
+ }
+ /**
+ * Add an additional parser for non-standard tags
+ *
+ * @param {Object} options a map of options for the added parser
+ * @param {RegExp} options.expression a regular expression to match the custom header
+ * @param {string} options.customType the custom type to register to the output
+ * @param {Function} [options.dataParser] function to parse the line into an object
+ * @param {boolean} [options.segment] should tag data be attached to the segment object
+ */
+
+ addParser(options) {
+ this.parseStream.addParser(options);
+ }
+ /**
+ * Add a custom header mapper
+ *
+ * @param {Object} options
+ * @param {RegExp} options.expression a regular expression to match the custom header
+ * @param {Function} options.map function to translate tag into a different tag
+ */
+
+ addTagMapper(options) {
+ this.parseStream.addTagMapper(options);
+ }
+ }
+
+ var regexs = {
+ // to determine mime types
+ mp4: /^(av0?1|avc0?[1234]|vp0?9|flac|opus|mp3|mp4a|mp4v|stpp.ttml.im1t)/,
+ webm: /^(vp0?[89]|av0?1|opus|vorbis)/,
+ ogg: /^(vp0?[89]|theora|flac|opus|vorbis)/,
+ // to determine if a codec is audio or video
+ video: /^(av0?1|avc0?[1234]|vp0?[89]|hvc1|hev1|theora|mp4v)/,
+ audio: /^(mp4a|flac|vorbis|opus|ac-[34]|ec-3|alac|mp3|speex|aac)/,
+ text: /^(stpp.ttml.im1t)/,
+ // mux.js support regex
+ muxerVideo: /^(avc0?1)/,
+ muxerAudio: /^(mp4a)/,
+ // match nothing as muxer does not support text right now.
+ // there cannot never be a character before the start of a string
+ // so this matches nothing.
+ muxerText: /a^/
+ };
+ var mediaTypes = ['video', 'audio', 'text'];
+ var upperMediaTypes = ['Video', 'Audio', 'Text'];
+ /**
+ * Replace the old apple-style `avc1.<dd>.<dd>` codec string with the standard
+ * `avc1.<hhhhhh>`
+ *
+ * @param {string} codec
+ * Codec string to translate
+ * @return {string}
+ * The translated codec string
+ */
+
+ var translateLegacyCodec = function translateLegacyCodec(codec) {
+ if (!codec) {
+ return codec;
+ }
+ return codec.replace(/avc1\.(\d+)\.(\d+)/i, function (orig, profile, avcLevel) {
+ var profileHex = ('00' + Number(profile).toString(16)).slice(-2);
+ var avcLevelHex = ('00' + Number(avcLevel).toString(16)).slice(-2);
+ return 'avc1.' + profileHex + '00' + avcLevelHex;
+ });
+ };
+ /**
+ * @typedef {Object} ParsedCodecInfo
+ * @property {number} codecCount
+ * Number of codecs parsed
+ * @property {string} [videoCodec]
+ * Parsed video codec (if found)
+ * @property {string} [videoObjectTypeIndicator]
+ * Video object type indicator (if found)
+ * @property {string|null} audioProfile
+ * Audio profile
+ */
+
+ /**
+ * Parses a codec string to retrieve the number of codecs specified, the video codec and
+ * object type indicator, and the audio profile.
+ *
+ * @param {string} [codecString]
+ * The codec string to parse
+ * @return {ParsedCodecInfo}
+ * Parsed codec info
+ */
+
+ var parseCodecs = function parseCodecs(codecString) {
+ if (codecString === void 0) {
+ codecString = '';
+ }
+ var codecs = codecString.split(',');
+ var result = [];
+ codecs.forEach(function (codec) {
+ codec = codec.trim();
+ var codecType;
+ mediaTypes.forEach(function (name) {
+ var match = regexs[name].exec(codec.toLowerCase());
+ if (!match || match.length <= 1) {
+ return;
+ }
+ codecType = name; // maintain codec case
+
+ var type = codec.substring(0, match[1].length);
+ var details = codec.replace(type, '');
+ result.push({
+ type: type,
+ details: details,
+ mediaType: name
+ });
+ });
+ if (!codecType) {
+ result.push({
+ type: codec,
+ details: '',
+ mediaType: 'unknown'
+ });
+ }
+ });
+ return result;
+ };
+ /**
+ * Returns a ParsedCodecInfo object for the default alternate audio playlist if there is
+ * a default alternate audio playlist for the provided audio group.
+ *
+ * @param {Object} master
+ * The master playlist
+ * @param {string} audioGroupId
+ * ID of the audio group for which to find the default codec info
+ * @return {ParsedCodecInfo}
+ * Parsed codec info
+ */
+
+ var codecsFromDefault = function codecsFromDefault(master, audioGroupId) {
+ if (!master.mediaGroups.AUDIO || !audioGroupId) {
+ return null;
+ }
+ var audioGroup = master.mediaGroups.AUDIO[audioGroupId];
+ if (!audioGroup) {
+ return null;
+ }
+ for (var name in audioGroup) {
+ var audioType = audioGroup[name];
+ if (audioType.default && audioType.playlists) {
+ // codec should be the same for all playlists within the audio type
+ return parseCodecs(audioType.playlists[0].attributes.CODECS);
+ }
+ }
+ return null;
+ };
+ var isAudioCodec = function isAudioCodec(codec) {
+ if (codec === void 0) {
+ codec = '';
+ }
+ return regexs.audio.test(codec.trim().toLowerCase());
+ };
+ var isTextCodec = function isTextCodec(codec) {
+ if (codec === void 0) {
+ codec = '';
+ }
+ return regexs.text.test(codec.trim().toLowerCase());
+ };
+ var getMimeForCodec = function getMimeForCodec(codecString) {
+ if (!codecString || typeof codecString !== 'string') {
+ return;
+ }
+ var codecs = codecString.toLowerCase().split(',').map(function (c) {
+ return translateLegacyCodec(c.trim());
+ }); // default to video type
+
+ var type = 'video'; // only change to audio type if the only codec we have is
+ // audio
+
+ if (codecs.length === 1 && isAudioCodec(codecs[0])) {
+ type = 'audio';
+ } else if (codecs.length === 1 && isTextCodec(codecs[0])) {
+ // text uses application/<container> for now
+ type = 'application';
+ } // default the container to mp4
+
+ var container = 'mp4'; // every codec must be able to go into the container
+ // for that container to be the correct one
+
+ if (codecs.every(function (c) {
+ return regexs.mp4.test(c);
+ })) {
+ container = 'mp4';
+ } else if (codecs.every(function (c) {
+ return regexs.webm.test(c);
+ })) {
+ container = 'webm';
+ } else if (codecs.every(function (c) {
+ return regexs.ogg.test(c);
+ })) {
+ container = 'ogg';
+ }
+ return type + "/" + container + ";codecs=\"" + codecString + "\"";
+ };
+ var browserSupportsCodec = function browserSupportsCodec(codecString) {
+ if (codecString === void 0) {
+ codecString = '';
+ }
+ return window.MediaSource && window.MediaSource.isTypeSupported && window.MediaSource.isTypeSupported(getMimeForCodec(codecString)) || false;
+ };
+ var muxerSupportsCodec = function muxerSupportsCodec(codecString) {
+ if (codecString === void 0) {
+ codecString = '';
+ }
+ return codecString.toLowerCase().split(',').every(function (codec) {
+ codec = codec.trim(); // any match is supported.
+
+ for (var i = 0; i < upperMediaTypes.length; i++) {
+ var type = upperMediaTypes[i];
+ if (regexs["muxer" + type].test(codec)) {
+ return true;
+ }
+ }
+ return false;
+ });
+ };
+ var DEFAULT_AUDIO_CODEC = 'mp4a.40.2';
+ var DEFAULT_VIDEO_CODEC = 'avc1.4d400d';
+
+ var MPEGURL_REGEX = /^(audio|video|application)\/(x-|vnd\.apple\.)?mpegurl/i;
+ var DASH_REGEX = /^application\/dash\+xml/i;
+ /**
+ * Returns a string that describes the type of source based on a video source object's
+ * media type.
+ *
+ * @see {@link https://dev.w3.org/html5/pf-summary/video.html#dom-source-type|Source Type}
+ *
+ * @param {string} type
+ * Video source object media type
+ * @return {('hls'|'dash'|'vhs-json'|null)}
+ * VHS source type string
+ */
+
+ var simpleTypeFromSourceType = function simpleTypeFromSourceType(type) {
+ if (MPEGURL_REGEX.test(type)) {
+ return 'hls';
+ }
+ if (DASH_REGEX.test(type)) {
+ return 'dash';
+ } // Denotes the special case of a manifest object passed to http-streaming instead of a
+ // source URL.
+ //
+ // See https://en.wikipedia.org/wiki/Media_type for details on specifying media types.
+ //
+ // In this case, vnd stands for vendor, video.js for the organization, VHS for this
+ // project, and the +json suffix identifies the structure of the media type.
+
+ if (type === 'application/vnd.videojs.vhs+json') {
+ return 'vhs-json';
+ }
+ return null;
+ };
+
+ // const log2 = Math.log2 ? Math.log2 : (x) => (Math.log(x) / Math.log(2));
+ // we used to do this with log2 but BigInt does not support builtin math
+ // Math.ceil(log2(x));
+
+ var countBits = function countBits(x) {
+ return x.toString(2).length;
+ }; // count the number of whole bytes it would take to represent a number
+
+ var countBytes = function countBytes(x) {
+ return Math.ceil(countBits(x) / 8);
+ };
+ var isArrayBufferView = function isArrayBufferView(obj) {
+ if (ArrayBuffer.isView === 'function') {
+ return ArrayBuffer.isView(obj);
+ }
+ return obj && obj.buffer instanceof ArrayBuffer;
+ };
+ var isTypedArray = function isTypedArray(obj) {
+ return isArrayBufferView(obj);
+ };
+ var toUint8 = function toUint8(bytes) {
+ if (bytes instanceof Uint8Array) {
+ return bytes;
+ }
+ if (!Array.isArray(bytes) && !isTypedArray(bytes) && !(bytes instanceof ArrayBuffer)) {
+ // any non-number or NaN leads to empty uint8array
+ // eslint-disable-next-line
+ if (typeof bytes !== 'number' || typeof bytes === 'number' && bytes !== bytes) {
+ bytes = 0;
+ } else {
+ bytes = [bytes];
+ }
+ }
+ return new Uint8Array(bytes && bytes.buffer || bytes, bytes && bytes.byteOffset || 0, bytes && bytes.byteLength || 0);
+ };
+ var BigInt = window.BigInt || Number;
+ var BYTE_TABLE = [BigInt('0x1'), BigInt('0x100'), BigInt('0x10000'), BigInt('0x1000000'), BigInt('0x100000000'), BigInt('0x10000000000'), BigInt('0x1000000000000'), BigInt('0x100000000000000'), BigInt('0x10000000000000000')];
+ (function () {
+ var a = new Uint16Array([0xFFCC]);
+ var b = new Uint8Array(a.buffer, a.byteOffset, a.byteLength);
+ if (b[0] === 0xFF) {
+ return 'big';
+ }
+ if (b[0] === 0xCC) {
+ return 'little';
+ }
+ return 'unknown';
+ })();
+ var bytesToNumber = function bytesToNumber(bytes, _temp) {
+ var _ref = _temp === void 0 ? {} : _temp,
+ _ref$signed = _ref.signed,
+ signed = _ref$signed === void 0 ? false : _ref$signed,
+ _ref$le = _ref.le,
+ le = _ref$le === void 0 ? false : _ref$le;
+ bytes = toUint8(bytes);
+ var fn = le ? 'reduce' : 'reduceRight';
+ var obj = bytes[fn] ? bytes[fn] : Array.prototype[fn];
+ var number = obj.call(bytes, function (total, byte, i) {
+ var exponent = le ? i : Math.abs(i + 1 - bytes.length);
+ return total + BigInt(byte) * BYTE_TABLE[exponent];
+ }, BigInt(0));
+ if (signed) {
+ var max = BYTE_TABLE[bytes.length] / BigInt(2) - BigInt(1);
+ number = BigInt(number);
+ if (number > max) {
+ number -= max;
+ number -= max;
+ number -= BigInt(2);
+ }
+ }
+ return Number(number);
+ };
+ var numberToBytes = function numberToBytes(number, _temp2) {
+ var _ref2 = _temp2 === void 0 ? {} : _temp2,
+ _ref2$le = _ref2.le,
+ le = _ref2$le === void 0 ? false : _ref2$le;
+
+ // eslint-disable-next-line
+ if (typeof number !== 'bigint' && typeof number !== 'number' || typeof number === 'number' && number !== number) {
+ number = 0;
+ }
+ number = BigInt(number);
+ var byteCount = countBytes(number);
+ var bytes = new Uint8Array(new ArrayBuffer(byteCount));
+ for (var i = 0; i < byteCount; i++) {
+ var byteIndex = le ? i : Math.abs(i + 1 - bytes.length);
+ bytes[byteIndex] = Number(number / BYTE_TABLE[i] & BigInt(0xFF));
+ if (number < 0) {
+ bytes[byteIndex] = Math.abs(~bytes[byteIndex]);
+ bytes[byteIndex] -= i === 0 ? 1 : 2;
+ }
+ }
+ return bytes;
+ };
+ var stringToBytes = function stringToBytes(string, stringIsBytes) {
+ if (typeof string !== 'string' && string && typeof string.toString === 'function') {
+ string = string.toString();
+ }
+ if (typeof string !== 'string') {
+ return new Uint8Array();
+ } // If the string already is bytes, we don't have to do this
+ // otherwise we do this so that we split multi length characters
+ // into individual bytes
+
+ if (!stringIsBytes) {
+ string = unescape(encodeURIComponent(string));
+ }
+ var view = new Uint8Array(string.length);
+ for (var i = 0; i < string.length; i++) {
+ view[i] = string.charCodeAt(i);
+ }
+ return view;
+ };
+ var concatTypedArrays = function concatTypedArrays() {
+ for (var _len = arguments.length, buffers = new Array(_len), _key = 0; _key < _len; _key++) {
+ buffers[_key] = arguments[_key];
+ }
+ buffers = buffers.filter(function (b) {
+ return b && (b.byteLength || b.length) && typeof b !== 'string';
+ });
+ if (buffers.length <= 1) {
+ // for 0 length we will return empty uint8
+ // for 1 length we return the first uint8
+ return toUint8(buffers[0]);
+ }
+ var totalLen = buffers.reduce(function (total, buf, i) {
+ return total + (buf.byteLength || buf.length);
+ }, 0);
+ var tempBuffer = new Uint8Array(totalLen);
+ var offset = 0;
+ buffers.forEach(function (buf) {
+ buf = toUint8(buf);
+ tempBuffer.set(buf, offset);
+ offset += buf.byteLength;
+ });
+ return tempBuffer;
+ };
+ /**
+ * Check if the bytes "b" are contained within bytes "a".
+ *
+ * @param {Uint8Array|Array} a
+ * Bytes to check in
+ *
+ * @param {Uint8Array|Array} b
+ * Bytes to check for
+ *
+ * @param {Object} options
+ * options
+ *
+ * @param {Array|Uint8Array} [offset=0]
+ * offset to use when looking at bytes in a
+ *
+ * @param {Array|Uint8Array} [mask=[]]
+ * mask to use on bytes before comparison.
+ *
+ * @return {boolean}
+ * If all bytes in b are inside of a, taking into account
+ * bit masks.
+ */
+
+ var bytesMatch = function bytesMatch(a, b, _temp3) {
+ var _ref3 = _temp3 === void 0 ? {} : _temp3,
+ _ref3$offset = _ref3.offset,
+ offset = _ref3$offset === void 0 ? 0 : _ref3$offset,
+ _ref3$mask = _ref3.mask,
+ mask = _ref3$mask === void 0 ? [] : _ref3$mask;
+ a = toUint8(a);
+ b = toUint8(b); // ie 11 does not support uint8 every
+
+ var fn = b.every ? b.every : Array.prototype.every;
+ return b.length && a.length - offset >= b.length &&
+ // ie 11 doesn't support every on uin8
+ fn.call(b, function (bByte, i) {
+ var aByte = mask[i] ? mask[i] & a[offset + i] : a[offset + i];
+ return bByte === aByte;
+ });
+ };
+
+ /**
+ * Loops through all supported media groups in master and calls the provided
+ * callback for each group
+ *
+ * @param {Object} master
+ * The parsed master manifest object
+ * @param {string[]} groups
+ * The media groups to call the callback for
+ * @param {Function} callback
+ * Callback to call for each media group
+ */
+ var forEachMediaGroup$1 = function forEachMediaGroup(master, groups, callback) {
+ groups.forEach(function (mediaType) {
+ for (var groupKey in master.mediaGroups[mediaType]) {
+ for (var labelKey in master.mediaGroups[mediaType][groupKey]) {
+ var mediaProperties = master.mediaGroups[mediaType][groupKey][labelKey];
+ callback(mediaProperties, mediaType, groupKey, labelKey);
+ }
+ }
+ });
+ };
+
+ var atob = function atob(s) {
+ return window.atob ? window.atob(s) : Buffer.from(s, 'base64').toString('binary');
+ };
+ function decodeB64ToUint8Array(b64Text) {
+ var decodedString = atob(b64Text);
+ var array = new Uint8Array(decodedString.length);
+ for (var i = 0; i < decodedString.length; i++) {
+ array[i] = decodedString.charCodeAt(i);
+ }
+ return array;
+ }
+
+ /**
+ * Ponyfill for `Array.prototype.find` which is only available in ES6 runtimes.
+ *
+ * Works with anything that has a `length` property and index access properties, including NodeList.
+ *
+ * @template {unknown} T
+ * @param {Array<T> | ({length:number, [number]: T})} list
+ * @param {function (item: T, index: number, list:Array<T> | ({length:number, [number]: T})):boolean} predicate
+ * @param {Partial<Pick<ArrayConstructor['prototype'], 'find'>>?} ac `Array.prototype` by default,
+ * allows injecting a custom implementation in tests
+ * @returns {T | undefined}
+ *
+ * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/find
+ * @see https://tc39.es/ecma262/multipage/indexed-collections.html#sec-array.prototype.find
+ */
+ function find$1(list, predicate, ac) {
+ if (ac === undefined) {
+ ac = Array.prototype;
+ }
+ if (list && typeof ac.find === 'function') {
+ return ac.find.call(list, predicate);
+ }
+ for (var i = 0; i < list.length; i++) {
+ if (Object.prototype.hasOwnProperty.call(list, i)) {
+ var item = list[i];
+ if (predicate.call(undefined, item, i, list)) {
+ return item;
+ }
+ }
+ }
+ }
+
+ /**
+ * "Shallow freezes" an object to render it immutable.
+ * Uses `Object.freeze` if available,
+ * otherwise the immutability is only in the type.
+ *
+ * Is used to create "enum like" objects.
+ *
+ * @template T
+ * @param {T} object the object to freeze
+ * @param {Pick<ObjectConstructor, 'freeze'> = Object} oc `Object` by default,
+ * allows to inject custom object constructor for tests
+ * @returns {Readonly<T>}
+ *
+ * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/freeze
+ */
+ function freeze(object, oc) {
+ if (oc === undefined) {
+ oc = Object;
+ }
+ return oc && typeof oc.freeze === 'function' ? oc.freeze(object) : object;
+ }
+
+ /**
+ * Since we can not rely on `Object.assign` we provide a simplified version
+ * that is sufficient for our needs.
+ *
+ * @param {Object} target
+ * @param {Object | null | undefined} source
+ *
+ * @returns {Object} target
+ * @throws TypeError if target is not an object
+ *
+ * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign
+ * @see https://tc39.es/ecma262/multipage/fundamental-objects.html#sec-object.assign
+ */
+ function assign(target, source) {
+ if (target === null || typeof target !== 'object') {
+ throw new TypeError('target is not an object');
+ }
+ for (var key in source) {
+ if (Object.prototype.hasOwnProperty.call(source, key)) {
+ target[key] = source[key];
+ }
+ }
+ return target;
+ }
+
+ /**
+ * All mime types that are allowed as input to `DOMParser.parseFromString`
+ *
+ * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMParser/parseFromString#Argument02 MDN
+ * @see https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#domparsersupportedtype WHATWG HTML Spec
+ * @see DOMParser.prototype.parseFromString
+ */
+ var MIME_TYPE = freeze({
+ /**
+ * `text/html`, the only mime type that triggers treating an XML document as HTML.
+ *
+ * @see DOMParser.SupportedType.isHTML
+ * @see https://www.iana.org/assignments/media-types/text/html IANA MimeType registration
+ * @see https://en.wikipedia.org/wiki/HTML Wikipedia
+ * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMParser/parseFromString MDN
+ * @see https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#dom-domparser-parsefromstring WHATWG HTML Spec
+ */
+ HTML: 'text/html',
+ /**
+ * Helper method to check a mime type if it indicates an HTML document
+ *
+ * @param {string} [value]
+ * @returns {boolean}
+ *
+ * @see https://www.iana.org/assignments/media-types/text/html IANA MimeType registration
+ * @see https://en.wikipedia.org/wiki/HTML Wikipedia
+ * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMParser/parseFromString MDN
+ * @see https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#dom-domparser-parsefromstring */
+ isHTML: function (value) {
+ return value === MIME_TYPE.HTML;
+ },
+ /**
+ * `application/xml`, the standard mime type for XML documents.
+ *
+ * @see https://www.iana.org/assignments/media-types/application/xml IANA MimeType registration
+ * @see https://tools.ietf.org/html/rfc7303#section-9.1 RFC 7303
+ * @see https://en.wikipedia.org/wiki/XML_and_MIME Wikipedia
+ */
+ XML_APPLICATION: 'application/xml',
+ /**
+ * `text/html`, an alias for `application/xml`.
+ *
+ * @see https://tools.ietf.org/html/rfc7303#section-9.2 RFC 7303
+ * @see https://www.iana.org/assignments/media-types/text/xml IANA MimeType registration
+ * @see https://en.wikipedia.org/wiki/XML_and_MIME Wikipedia
+ */
+ XML_TEXT: 'text/xml',
+ /**
+ * `application/xhtml+xml`, indicates an XML document that has the default HTML namespace,
+ * but is parsed as an XML document.
+ *
+ * @see https://www.iana.org/assignments/media-types/application/xhtml+xml IANA MimeType registration
+ * @see https://dom.spec.whatwg.org/#dom-domimplementation-createdocument WHATWG DOM Spec
+ * @see https://en.wikipedia.org/wiki/XHTML Wikipedia
+ */
+ XML_XHTML_APPLICATION: 'application/xhtml+xml',
+ /**
+ * `image/svg+xml`,
+ *
+ * @see https://www.iana.org/assignments/media-types/image/svg+xml IANA MimeType registration
+ * @see https://www.w3.org/TR/SVG11/ W3C SVG 1.1
+ * @see https://en.wikipedia.org/wiki/Scalable_Vector_Graphics Wikipedia
+ */
+ XML_SVG_IMAGE: 'image/svg+xml'
+ });
+
+ /**
+ * Namespaces that are used in this code base.
+ *
+ * @see http://www.w3.org/TR/REC-xml-names
+ */
+ var NAMESPACE$3 = freeze({
+ /**
+ * The XHTML namespace.
+ *
+ * @see http://www.w3.org/1999/xhtml
+ */
+ HTML: 'http://www.w3.org/1999/xhtml',
+ /**
+ * Checks if `uri` equals `NAMESPACE.HTML`.
+ *
+ * @param {string} [uri]
+ *
+ * @see NAMESPACE.HTML
+ */
+ isHTML: function (uri) {
+ return uri === NAMESPACE$3.HTML;
+ },
+ /**
+ * The SVG namespace.
+ *
+ * @see http://www.w3.org/2000/svg
+ */
+ SVG: 'http://www.w3.org/2000/svg',
+ /**
+ * The `xml:` namespace.
+ *
+ * @see http://www.w3.org/XML/1998/namespace
+ */
+ XML: 'http://www.w3.org/XML/1998/namespace',
+ /**
+ * The `xmlns:` namespace
+ *
+ * @see https://www.w3.org/2000/xmlns/
+ */
+ XMLNS: 'http://www.w3.org/2000/xmlns/'
+ });
+ var assign_1 = assign;
+ var find_1 = find$1;
+ var freeze_1 = freeze;
+ var MIME_TYPE_1 = MIME_TYPE;
+ var NAMESPACE_1 = NAMESPACE$3;
+ var conventions = {
+ assign: assign_1,
+ find: find_1,
+ freeze: freeze_1,
+ MIME_TYPE: MIME_TYPE_1,
+ NAMESPACE: NAMESPACE_1
+ };
+
+ var find = conventions.find;
+ var NAMESPACE$2 = conventions.NAMESPACE;
+
+ /**
+ * A prerequisite for `[].filter`, to drop elements that are empty
+ * @param {string} input
+ * @returns {boolean}
+ */
+ function notEmptyString(input) {
+ return input !== '';
+ }
+ /**
+ * @see https://infra.spec.whatwg.org/#split-on-ascii-whitespace
+ * @see https://infra.spec.whatwg.org/#ascii-whitespace
+ *
+ * @param {string} input
+ * @returns {string[]} (can be empty)
+ */
+ function splitOnASCIIWhitespace(input) {
+ // U+0009 TAB, U+000A LF, U+000C FF, U+000D CR, U+0020 SPACE
+ return input ? input.split(/[\t\n\f\r ]+/).filter(notEmptyString) : [];
+ }
+
+ /**
+ * Adds element as a key to current if it is not already present.
+ *
+ * @param {Record<string, boolean | undefined>} current
+ * @param {string} element
+ * @returns {Record<string, boolean | undefined>}
+ */
+ function orderedSetReducer(current, element) {
+ if (!current.hasOwnProperty(element)) {
+ current[element] = true;
+ }
+ return current;
+ }
+
+ /**
+ * @see https://infra.spec.whatwg.org/#ordered-set
+ * @param {string} input
+ * @returns {string[]}
+ */
+ function toOrderedSet(input) {
+ if (!input) return [];
+ var list = splitOnASCIIWhitespace(input);
+ return Object.keys(list.reduce(orderedSetReducer, {}));
+ }
+
+ /**
+ * Uses `list.indexOf` to implement something like `Array.prototype.includes`,
+ * which we can not rely on being available.
+ *
+ * @param {any[]} list
+ * @returns {function(any): boolean}
+ */
+ function arrayIncludes(list) {
+ return function (element) {
+ return list && list.indexOf(element) !== -1;
+ };
+ }
+ function copy(src, dest) {
+ for (var p in src) {
+ if (Object.prototype.hasOwnProperty.call(src, p)) {
+ dest[p] = src[p];
+ }
+ }
+ }
+
+ /**
+ ^\w+\.prototype\.([_\w]+)\s*=\s*((?:.*\{\s*?[\r\n][\s\S]*?^})|\S.*?(?=[;\r\n]));?
+ ^\w+\.prototype\.([_\w]+)\s*=\s*(\S.*?(?=[;\r\n]));?
+ */
+ function _extends(Class, Super) {
+ var pt = Class.prototype;
+ if (!(pt instanceof Super)) {
+ function t() {}
+ t.prototype = Super.prototype;
+ t = new t();
+ copy(pt, t);
+ Class.prototype = pt = t;
+ }
+ if (pt.constructor != Class) {
+ if (typeof Class != 'function') {
+ console.error("unknown Class:" + Class);
+ }
+ pt.constructor = Class;
+ }
+ }
+
+ // Node Types
+ var NodeType = {};
+ var ELEMENT_NODE = NodeType.ELEMENT_NODE = 1;
+ var ATTRIBUTE_NODE = NodeType.ATTRIBUTE_NODE = 2;
+ var TEXT_NODE = NodeType.TEXT_NODE = 3;
+ var CDATA_SECTION_NODE = NodeType.CDATA_SECTION_NODE = 4;
+ var ENTITY_REFERENCE_NODE = NodeType.ENTITY_REFERENCE_NODE = 5;
+ var ENTITY_NODE = NodeType.ENTITY_NODE = 6;
+ var PROCESSING_INSTRUCTION_NODE = NodeType.PROCESSING_INSTRUCTION_NODE = 7;
+ var COMMENT_NODE = NodeType.COMMENT_NODE = 8;
+ var DOCUMENT_NODE = NodeType.DOCUMENT_NODE = 9;
+ var DOCUMENT_TYPE_NODE = NodeType.DOCUMENT_TYPE_NODE = 10;
+ var DOCUMENT_FRAGMENT_NODE = NodeType.DOCUMENT_FRAGMENT_NODE = 11;
+ var NOTATION_NODE = NodeType.NOTATION_NODE = 12;
+
+ // ExceptionCode
+ var ExceptionCode = {};
+ var ExceptionMessage = {};
+ ExceptionCode.INDEX_SIZE_ERR = (ExceptionMessage[1] = "Index size error", 1);
+ ExceptionCode.DOMSTRING_SIZE_ERR = (ExceptionMessage[2] = "DOMString size error", 2);
+ var HIERARCHY_REQUEST_ERR = ExceptionCode.HIERARCHY_REQUEST_ERR = (ExceptionMessage[3] = "Hierarchy request error", 3);
+ ExceptionCode.WRONG_DOCUMENT_ERR = (ExceptionMessage[4] = "Wrong document", 4);
+ ExceptionCode.INVALID_CHARACTER_ERR = (ExceptionMessage[5] = "Invalid character", 5);
+ ExceptionCode.NO_DATA_ALLOWED_ERR = (ExceptionMessage[6] = "No data allowed", 6);
+ ExceptionCode.NO_MODIFICATION_ALLOWED_ERR = (ExceptionMessage[7] = "No modification allowed", 7);
+ var NOT_FOUND_ERR = ExceptionCode.NOT_FOUND_ERR = (ExceptionMessage[8] = "Not found", 8);
+ ExceptionCode.NOT_SUPPORTED_ERR = (ExceptionMessage[9] = "Not supported", 9);
+ var INUSE_ATTRIBUTE_ERR = ExceptionCode.INUSE_ATTRIBUTE_ERR = (ExceptionMessage[10] = "Attribute in use", 10);
+ //level2
+ ExceptionCode.INVALID_STATE_ERR = (ExceptionMessage[11] = "Invalid state", 11);
+ ExceptionCode.SYNTAX_ERR = (ExceptionMessage[12] = "Syntax error", 12);
+ ExceptionCode.INVALID_MODIFICATION_ERR = (ExceptionMessage[13] = "Invalid modification", 13);
+ ExceptionCode.NAMESPACE_ERR = (ExceptionMessage[14] = "Invalid namespace", 14);
+ ExceptionCode.INVALID_ACCESS_ERR = (ExceptionMessage[15] = "Invalid access", 15);
+
+ /**
+ * DOM Level 2
+ * Object DOMException
+ * @see http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/ecma-script-binding.html
+ * @see http://www.w3.org/TR/REC-DOM-Level-1/ecma-script-language-binding.html
+ */
+ function DOMException(code, message) {
+ if (message instanceof Error) {
+ var error = message;
+ } else {
+ error = this;
+ Error.call(this, ExceptionMessage[code]);
+ this.message = ExceptionMessage[code];
+ if (Error.captureStackTrace) Error.captureStackTrace(this, DOMException);
+ }
+ error.code = code;
+ if (message) this.message = this.message + ": " + message;
+ return error;
+ }
+ DOMException.prototype = Error.prototype;
+ copy(ExceptionCode, DOMException);
+
+ /**
+ * @see http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/core.html#ID-536297177
+ * The NodeList interface provides the abstraction of an ordered collection of nodes, without defining or constraining how this collection is implemented. NodeList objects in the DOM are live.
+ * The items in the NodeList are accessible via an integral index, starting from 0.
+ */
+ function NodeList() {}
+ NodeList.prototype = {
+ /**
+ * The number of nodes in the list. The range of valid child node indices is 0 to length-1 inclusive.
+ * @standard level1
+ */
+ length: 0,
+ /**
+ * Returns the indexth item in the collection. If index is greater than or equal to the number of nodes in the list, this returns null.
+ * @standard level1
+ * @param index unsigned long
+ * Index into the collection.
+ * @return Node
+ * The node at the indexth position in the NodeList, or null if that is not a valid index.
+ */
+ item: function (index) {
+ return index >= 0 && index < this.length ? this[index] : null;
+ },
+ toString: function (isHTML, nodeFilter) {
+ for (var buf = [], i = 0; i < this.length; i++) {
+ serializeToString(this[i], buf, isHTML, nodeFilter);
+ }
+ return buf.join('');
+ },
+ /**
+ * @private
+ * @param {function (Node):boolean} predicate
+ * @returns {Node[]}
+ */
+ filter: function (predicate) {
+ return Array.prototype.filter.call(this, predicate);
+ },
+ /**
+ * @private
+ * @param {Node} item
+ * @returns {number}
+ */
+ indexOf: function (item) {
+ return Array.prototype.indexOf.call(this, item);
+ }
+ };
+ function LiveNodeList(node, refresh) {
+ this._node = node;
+ this._refresh = refresh;
+ _updateLiveList(this);
+ }
+ function _updateLiveList(list) {
+ var inc = list._node._inc || list._node.ownerDocument._inc;
+ if (list._inc !== inc) {
+ var ls = list._refresh(list._node);
+ __set__(list, 'length', ls.length);
+ if (!list.$$length || ls.length < list.$$length) {
+ for (var i = ls.length; (i in list); i++) {
+ if (Object.prototype.hasOwnProperty.call(list, i)) {
+ delete list[i];
+ }
+ }
+ }
+ copy(ls, list);
+ list._inc = inc;
+ }
+ }
+ LiveNodeList.prototype.item = function (i) {
+ _updateLiveList(this);
+ return this[i] || null;
+ };
+ _extends(LiveNodeList, NodeList);
+
+ /**
+ * Objects implementing the NamedNodeMap interface are used
+ * to represent collections of nodes that can be accessed by name.
+ * Note that NamedNodeMap does not inherit from NodeList;
+ * NamedNodeMaps are not maintained in any particular order.
+ * Objects contained in an object implementing NamedNodeMap may also be accessed by an ordinal index,
+ * but this is simply to allow convenient enumeration of the contents of a NamedNodeMap,
+ * and does not imply that the DOM specifies an order to these Nodes.
+ * NamedNodeMap objects in the DOM are live.
+ * used for attributes or DocumentType entities
+ */
+ function NamedNodeMap() {}
+ function _findNodeIndex(list, node) {
+ var i = list.length;
+ while (i--) {
+ if (list[i] === node) {
+ return i;
+ }
+ }
+ }
+ function _addNamedNode(el, list, newAttr, oldAttr) {
+ if (oldAttr) {
+ list[_findNodeIndex(list, oldAttr)] = newAttr;
+ } else {
+ list[list.length++] = newAttr;
+ }
+ if (el) {
+ newAttr.ownerElement = el;
+ var doc = el.ownerDocument;
+ if (doc) {
+ oldAttr && _onRemoveAttribute(doc, el, oldAttr);
+ _onAddAttribute(doc, el, newAttr);
+ }
+ }
+ }
+ function _removeNamedNode(el, list, attr) {
+ //console.log('remove attr:'+attr)
+ var i = _findNodeIndex(list, attr);
+ if (i >= 0) {
+ var lastIndex = list.length - 1;
+ while (i < lastIndex) {
+ list[i] = list[++i];
+ }
+ list.length = lastIndex;
+ if (el) {
+ var doc = el.ownerDocument;
+ if (doc) {
+ _onRemoveAttribute(doc, el, attr);
+ attr.ownerElement = null;
+ }
+ }
+ } else {
+ throw new DOMException(NOT_FOUND_ERR, new Error(el.tagName + '@' + attr));
+ }
+ }
+ NamedNodeMap.prototype = {
+ length: 0,
+ item: NodeList.prototype.item,
+ getNamedItem: function (key) {
+ // if(key.indexOf(':')>0 || key == 'xmlns'){
+ // return null;
+ // }
+ //console.log()
+ var i = this.length;
+ while (i--) {
+ var attr = this[i];
+ //console.log(attr.nodeName,key)
+ if (attr.nodeName == key) {
+ return attr;
+ }
+ }
+ },
+ setNamedItem: function (attr) {
+ var el = attr.ownerElement;
+ if (el && el != this._ownerElement) {
+ throw new DOMException(INUSE_ATTRIBUTE_ERR);
+ }
+ var oldAttr = this.getNamedItem(attr.nodeName);
+ _addNamedNode(this._ownerElement, this, attr, oldAttr);
+ return oldAttr;
+ },
+ /* returns Node */
+ setNamedItemNS: function (attr) {
+ // raises: WRONG_DOCUMENT_ERR,NO_MODIFICATION_ALLOWED_ERR,INUSE_ATTRIBUTE_ERR
+ var el = attr.ownerElement,
+ oldAttr;
+ if (el && el != this._ownerElement) {
+ throw new DOMException(INUSE_ATTRIBUTE_ERR);
+ }
+ oldAttr = this.getNamedItemNS(attr.namespaceURI, attr.localName);
+ _addNamedNode(this._ownerElement, this, attr, oldAttr);
+ return oldAttr;
+ },
+ /* returns Node */
+ removeNamedItem: function (key) {
+ var attr = this.getNamedItem(key);
+ _removeNamedNode(this._ownerElement, this, attr);
+ return attr;
+ },
+ // raises: NOT_FOUND_ERR,NO_MODIFICATION_ALLOWED_ERR
+
+ //for level2
+ removeNamedItemNS: function (namespaceURI, localName) {
+ var attr = this.getNamedItemNS(namespaceURI, localName);
+ _removeNamedNode(this._ownerElement, this, attr);
+ return attr;
+ },
+ getNamedItemNS: function (namespaceURI, localName) {
+ var i = this.length;
+ while (i--) {
+ var node = this[i];
+ if (node.localName == localName && node.namespaceURI == namespaceURI) {
+ return node;
+ }
+ }
+ return null;
+ }
+ };
+
+ /**
+ * The DOMImplementation interface represents an object providing methods
+ * which are not dependent on any particular document.
+ * Such an object is returned by the `Document.implementation` property.
+ *
+ * __The individual methods describe the differences compared to the specs.__
+ *
+ * @constructor
+ *
+ * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMImplementation MDN
+ * @see https://www.w3.org/TR/REC-DOM-Level-1/level-one-core.html#ID-102161490 DOM Level 1 Core (Initial)
+ * @see https://www.w3.org/TR/DOM-Level-2-Core/core.html#ID-102161490 DOM Level 2 Core
+ * @see https://www.w3.org/TR/DOM-Level-3-Core/core.html#ID-102161490 DOM Level 3 Core
+ * @see https://dom.spec.whatwg.org/#domimplementation DOM Living Standard
+ */
+ function DOMImplementation$1() {}
+ DOMImplementation$1.prototype = {
+ /**
+ * The DOMImplementation.hasFeature() method returns a Boolean flag indicating if a given feature is supported.
+ * The different implementations fairly diverged in what kind of features were reported.
+ * The latest version of the spec settled to force this method to always return true, where the functionality was accurate and in use.
+ *
+ * @deprecated It is deprecated and modern browsers return true in all cases.
+ *
+ * @param {string} feature
+ * @param {string} [version]
+ * @returns {boolean} always true
+ *
+ * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMImplementation/hasFeature MDN
+ * @see https://www.w3.org/TR/REC-DOM-Level-1/level-one-core.html#ID-5CED94D7 DOM Level 1 Core
+ * @see https://dom.spec.whatwg.org/#dom-domimplementation-hasfeature DOM Living Standard
+ */
+ hasFeature: function (feature, version) {
+ return true;
+ },
+ /**
+ * Creates an XML Document object of the specified type with its document element.
+ *
+ * __It behaves slightly different from the description in the living standard__:
+ * - There is no interface/class `XMLDocument`, it returns a `Document` instance.
+ * - `contentType`, `encoding`, `mode`, `origin`, `url` fields are currently not declared.
+ * - this implementation is not validating names or qualified names
+ * (when parsing XML strings, the SAX parser takes care of that)
+ *
+ * @param {string|null} namespaceURI
+ * @param {string} qualifiedName
+ * @param {DocumentType=null} doctype
+ * @returns {Document}
+ *
+ * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMImplementation/createDocument MDN
+ * @see https://www.w3.org/TR/DOM-Level-2-Core/core.html#Level-2-Core-DOM-createDocument DOM Level 2 Core (initial)
+ * @see https://dom.spec.whatwg.org/#dom-domimplementation-createdocument DOM Level 2 Core
+ *
+ * @see https://dom.spec.whatwg.org/#validate-and-extract DOM: Validate and extract
+ * @see https://www.w3.org/TR/xml/#NT-NameStartChar XML Spec: Names
+ * @see https://www.w3.org/TR/xml-names/#ns-qualnames XML Namespaces: Qualified names
+ */
+ createDocument: function (namespaceURI, qualifiedName, doctype) {
+ var doc = new Document();
+ doc.implementation = this;
+ doc.childNodes = new NodeList();
+ doc.doctype = doctype || null;
+ if (doctype) {
+ doc.appendChild(doctype);
+ }
+ if (qualifiedName) {
+ var root = doc.createElementNS(namespaceURI, qualifiedName);
+ doc.appendChild(root);
+ }
+ return doc;
+ },
+ /**
+ * Returns a doctype, with the given `qualifiedName`, `publicId`, and `systemId`.
+ *
+ * __This behavior is slightly different from the in the specs__:
+ * - this implementation is not validating names or qualified names
+ * (when parsing XML strings, the SAX parser takes care of that)
+ *
+ * @param {string} qualifiedName
+ * @param {string} [publicId]
+ * @param {string} [systemId]
+ * @returns {DocumentType} which can either be used with `DOMImplementation.createDocument` upon document creation
+ * or can be put into the document via methods like `Node.insertBefore()` or `Node.replaceChild()`
+ *
+ * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMImplementation/createDocumentType MDN
+ * @see https://www.w3.org/TR/DOM-Level-2-Core/core.html#Level-2-Core-DOM-createDocType DOM Level 2 Core
+ * @see https://dom.spec.whatwg.org/#dom-domimplementation-createdocumenttype DOM Living Standard
+ *
+ * @see https://dom.spec.whatwg.org/#validate-and-extract DOM: Validate and extract
+ * @see https://www.w3.org/TR/xml/#NT-NameStartChar XML Spec: Names
+ * @see https://www.w3.org/TR/xml-names/#ns-qualnames XML Namespaces: Qualified names
+ */
+ createDocumentType: function (qualifiedName, publicId, systemId) {
+ var node = new DocumentType();
+ node.name = qualifiedName;
+ node.nodeName = qualifiedName;
+ node.publicId = publicId || '';
+ node.systemId = systemId || '';
+ return node;
+ }
+ };
+
+ /**
+ * @see http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/core.html#ID-1950641247
+ */
+
+ function Node() {}
+ Node.prototype = {
+ firstChild: null,
+ lastChild: null,
+ previousSibling: null,
+ nextSibling: null,
+ attributes: null,
+ parentNode: null,
+ childNodes: null,
+ ownerDocument: null,
+ nodeValue: null,
+ namespaceURI: null,
+ prefix: null,
+ localName: null,
+ // Modified in DOM Level 2:
+ insertBefore: function (newChild, refChild) {
+ //raises
+ return _insertBefore(this, newChild, refChild);
+ },
+ replaceChild: function (newChild, oldChild) {
+ //raises
+ _insertBefore(this, newChild, oldChild, assertPreReplacementValidityInDocument);
+ if (oldChild) {
+ this.removeChild(oldChild);
+ }
+ },
+ removeChild: function (oldChild) {
+ return _removeChild(this, oldChild);
+ },
+ appendChild: function (newChild) {
+ return this.insertBefore(newChild, null);
+ },
+ hasChildNodes: function () {
+ return this.firstChild != null;
+ },
+ cloneNode: function (deep) {
+ return cloneNode(this.ownerDocument || this, this, deep);
+ },
+ // Modified in DOM Level 2:
+ normalize: function () {
+ var child = this.firstChild;
+ while (child) {
+ var next = child.nextSibling;
+ if (next && next.nodeType == TEXT_NODE && child.nodeType == TEXT_NODE) {
+ this.removeChild(next);
+ child.appendData(next.data);
+ } else {
+ child.normalize();
+ child = next;
+ }
+ }
+ },
+ // Introduced in DOM Level 2:
+ isSupported: function (feature, version) {
+ return this.ownerDocument.implementation.hasFeature(feature, version);
+ },
+ // Introduced in DOM Level 2:
+ hasAttributes: function () {
+ return this.attributes.length > 0;
+ },
+ /**
+ * Look up the prefix associated to the given namespace URI, starting from this node.
+ * **The default namespace declarations are ignored by this method.**
+ * See Namespace Prefix Lookup for details on the algorithm used by this method.
+ *
+ * _Note: The implementation seems to be incomplete when compared to the algorithm described in the specs._
+ *
+ * @param {string | null} namespaceURI
+ * @returns {string | null}
+ * @see https://www.w3.org/TR/DOM-Level-3-Core/core.html#Node3-lookupNamespacePrefix
+ * @see https://www.w3.org/TR/DOM-Level-3-Core/namespaces-algorithms.html#lookupNamespacePrefixAlgo
+ * @see https://dom.spec.whatwg.org/#dom-node-lookupprefix
+ * @see https://github.com/xmldom/xmldom/issues/322
+ */
+ lookupPrefix: function (namespaceURI) {
+ var el = this;
+ while (el) {
+ var map = el._nsMap;
+ //console.dir(map)
+ if (map) {
+ for (var n in map) {
+ if (Object.prototype.hasOwnProperty.call(map, n) && map[n] === namespaceURI) {
+ return n;
+ }
+ }
+ }
+ el = el.nodeType == ATTRIBUTE_NODE ? el.ownerDocument : el.parentNode;
+ }
+ return null;
+ },
+ // Introduced in DOM Level 3:
+ lookupNamespaceURI: function (prefix) {
+ var el = this;
+ while (el) {
+ var map = el._nsMap;
+ //console.dir(map)
+ if (map) {
+ if (Object.prototype.hasOwnProperty.call(map, prefix)) {
+ return map[prefix];
+ }
+ }
+ el = el.nodeType == ATTRIBUTE_NODE ? el.ownerDocument : el.parentNode;
+ }
+ return null;
+ },
+ // Introduced in DOM Level 3:
+ isDefaultNamespace: function (namespaceURI) {
+ var prefix = this.lookupPrefix(namespaceURI);
+ return prefix == null;
+ }
+ };
+ function _xmlEncoder(c) {
+ return c == '<' && '&lt;' || c == '>' && '&gt;' || c == '&' && '&amp;' || c == '"' && '&quot;' || '&#' + c.charCodeAt() + ';';
+ }
+ copy(NodeType, Node);
+ copy(NodeType, Node.prototype);
+
+ /**
+ * @param callback return true for continue,false for break
+ * @return boolean true: break visit;
+ */
+ function _visitNode(node, callback) {
+ if (callback(node)) {
+ return true;
+ }
+ if (node = node.firstChild) {
+ do {
+ if (_visitNode(node, callback)) {
+ return true;
+ }
+ } while (node = node.nextSibling);
+ }
+ }
+ function Document() {
+ this.ownerDocument = this;
+ }
+ function _onAddAttribute(doc, el, newAttr) {
+ doc && doc._inc++;
+ var ns = newAttr.namespaceURI;
+ if (ns === NAMESPACE$2.XMLNS) {
+ //update namespace
+ el._nsMap[newAttr.prefix ? newAttr.localName : ''] = newAttr.value;
+ }
+ }
+ function _onRemoveAttribute(doc, el, newAttr, remove) {
+ doc && doc._inc++;
+ var ns = newAttr.namespaceURI;
+ if (ns === NAMESPACE$2.XMLNS) {
+ //update namespace
+ delete el._nsMap[newAttr.prefix ? newAttr.localName : ''];
+ }
+ }
+
+ /**
+ * Updates `el.childNodes`, updating the indexed items and it's `length`.
+ * Passing `newChild` means it will be appended.
+ * Otherwise it's assumed that an item has been removed,
+ * and `el.firstNode` and it's `.nextSibling` are used
+ * to walk the current list of child nodes.
+ *
+ * @param {Document} doc
+ * @param {Node} el
+ * @param {Node} [newChild]
+ * @private
+ */
+ function _onUpdateChild(doc, el, newChild) {
+ if (doc && doc._inc) {
+ doc._inc++;
+ //update childNodes
+ var cs = el.childNodes;
+ if (newChild) {
+ cs[cs.length++] = newChild;
+ } else {
+ var child = el.firstChild;
+ var i = 0;
+ while (child) {
+ cs[i++] = child;
+ child = child.nextSibling;
+ }
+ cs.length = i;
+ delete cs[cs.length];
+ }
+ }
+ }
+
+ /**
+ * Removes the connections between `parentNode` and `child`
+ * and any existing `child.previousSibling` or `child.nextSibling`.
+ *
+ * @see https://github.com/xmldom/xmldom/issues/135
+ * @see https://github.com/xmldom/xmldom/issues/145
+ *
+ * @param {Node} parentNode
+ * @param {Node} child
+ * @returns {Node} the child that was removed.
+ * @private
+ */
+ function _removeChild(parentNode, child) {
+ var previous = child.previousSibling;
+ var next = child.nextSibling;
+ if (previous) {
+ previous.nextSibling = next;
+ } else {
+ parentNode.firstChild = next;
+ }
+ if (next) {
+ next.previousSibling = previous;
+ } else {
+ parentNode.lastChild = previous;
+ }
+ child.parentNode = null;
+ child.previousSibling = null;
+ child.nextSibling = null;
+ _onUpdateChild(parentNode.ownerDocument, parentNode);
+ return child;
+ }
+
+ /**
+ * Returns `true` if `node` can be a parent for insertion.
+ * @param {Node} node
+ * @returns {boolean}
+ */
+ function hasValidParentNodeType(node) {
+ return node && (node.nodeType === Node.DOCUMENT_NODE || node.nodeType === Node.DOCUMENT_FRAGMENT_NODE || node.nodeType === Node.ELEMENT_NODE);
+ }
+
+ /**
+ * Returns `true` if `node` can be inserted according to it's `nodeType`.
+ * @param {Node} node
+ * @returns {boolean}
+ */
+ function hasInsertableNodeType(node) {
+ return node && (isElementNode(node) || isTextNode(node) || isDocTypeNode(node) || node.nodeType === Node.DOCUMENT_FRAGMENT_NODE || node.nodeType === Node.COMMENT_NODE || node.nodeType === Node.PROCESSING_INSTRUCTION_NODE);
+ }
+
+ /**
+ * Returns true if `node` is a DOCTYPE node
+ * @param {Node} node
+ * @returns {boolean}
+ */
+ function isDocTypeNode(node) {
+ return node && node.nodeType === Node.DOCUMENT_TYPE_NODE;
+ }
+
+ /**
+ * Returns true if the node is an element
+ * @param {Node} node
+ * @returns {boolean}
+ */
+ function isElementNode(node) {
+ return node && node.nodeType === Node.ELEMENT_NODE;
+ }
+ /**
+ * Returns true if `node` is a text node
+ * @param {Node} node
+ * @returns {boolean}
+ */
+ function isTextNode(node) {
+ return node && node.nodeType === Node.TEXT_NODE;
+ }
+
+ /**
+ * Check if en element node can be inserted before `child`, or at the end if child is falsy,
+ * according to the presence and position of a doctype node on the same level.
+ *
+ * @param {Document} doc The document node
+ * @param {Node} child the node that would become the nextSibling if the element would be inserted
+ * @returns {boolean} `true` if an element can be inserted before child
+ * @private
+ * https://dom.spec.whatwg.org/#concept-node-ensure-pre-insertion-validity
+ */
+ function isElementInsertionPossible(doc, child) {
+ var parentChildNodes = doc.childNodes || [];
+ if (find(parentChildNodes, isElementNode) || isDocTypeNode(child)) {
+ return false;
+ }
+ var docTypeNode = find(parentChildNodes, isDocTypeNode);
+ return !(child && docTypeNode && parentChildNodes.indexOf(docTypeNode) > parentChildNodes.indexOf(child));
+ }
+
+ /**
+ * Check if en element node can be inserted before `child`, or at the end if child is falsy,
+ * according to the presence and position of a doctype node on the same level.
+ *
+ * @param {Node} doc The document node
+ * @param {Node} child the node that would become the nextSibling if the element would be inserted
+ * @returns {boolean} `true` if an element can be inserted before child
+ * @private
+ * https://dom.spec.whatwg.org/#concept-node-ensure-pre-insertion-validity
+ */
+ function isElementReplacementPossible(doc, child) {
+ var parentChildNodes = doc.childNodes || [];
+ function hasElementChildThatIsNotChild(node) {
+ return isElementNode(node) && node !== child;
+ }
+ if (find(parentChildNodes, hasElementChildThatIsNotChild)) {
+ return false;
+ }
+ var docTypeNode = find(parentChildNodes, isDocTypeNode);
+ return !(child && docTypeNode && parentChildNodes.indexOf(docTypeNode) > parentChildNodes.indexOf(child));
+ }
+
+ /**
+ * @private
+ * Steps 1-5 of the checks before inserting and before replacing a child are the same.
+ *
+ * @param {Node} parent the parent node to insert `node` into
+ * @param {Node} node the node to insert
+ * @param {Node=} child the node that should become the `nextSibling` of `node`
+ * @returns {Node}
+ * @throws DOMException for several node combinations that would create a DOM that is not well-formed.
+ * @throws DOMException if `child` is provided but is not a child of `parent`.
+ * @see https://dom.spec.whatwg.org/#concept-node-ensure-pre-insertion-validity
+ * @see https://dom.spec.whatwg.org/#concept-node-replace
+ */
+ function assertPreInsertionValidity1to5(parent, node, child) {
+ // 1. If `parent` is not a Document, DocumentFragment, or Element node, then throw a "HierarchyRequestError" DOMException.
+ if (!hasValidParentNodeType(parent)) {
+ throw new DOMException(HIERARCHY_REQUEST_ERR, 'Unexpected parent node type ' + parent.nodeType);
+ }
+ // 2. If `node` is a host-including inclusive ancestor of `parent`, then throw a "HierarchyRequestError" DOMException.
+ // not implemented!
+ // 3. If `child` is non-null and its parent is not `parent`, then throw a "NotFoundError" DOMException.
+ if (child && child.parentNode !== parent) {
+ throw new DOMException(NOT_FOUND_ERR, 'child not in parent');
+ }
+ if (
+ // 4. If `node` is not a DocumentFragment, DocumentType, Element, or CharacterData node, then throw a "HierarchyRequestError" DOMException.
+ !hasInsertableNodeType(node) ||
+ // 5. If either `node` is a Text node and `parent` is a document,
+ // the sax parser currently adds top level text nodes, this will be fixed in 0.9.0
+ // || (node.nodeType === Node.TEXT_NODE && parent.nodeType === Node.DOCUMENT_NODE)
+ // or `node` is a doctype and `parent` is not a document, then throw a "HierarchyRequestError" DOMException.
+ isDocTypeNode(node) && parent.nodeType !== Node.DOCUMENT_NODE) {
+ throw new DOMException(HIERARCHY_REQUEST_ERR, 'Unexpected node type ' + node.nodeType + ' for parent node type ' + parent.nodeType);
+ }
+ }
+
+ /**
+ * @private
+ * Step 6 of the checks before inserting and before replacing a child are different.
+ *
+ * @param {Document} parent the parent node to insert `node` into
+ * @param {Node} node the node to insert
+ * @param {Node | undefined} child the node that should become the `nextSibling` of `node`
+ * @returns {Node}
+ * @throws DOMException for several node combinations that would create a DOM that is not well-formed.
+ * @throws DOMException if `child` is provided but is not a child of `parent`.
+ * @see https://dom.spec.whatwg.org/#concept-node-ensure-pre-insertion-validity
+ * @see https://dom.spec.whatwg.org/#concept-node-replace
+ */
+ function assertPreInsertionValidityInDocument(parent, node, child) {
+ var parentChildNodes = parent.childNodes || [];
+ var nodeChildNodes = node.childNodes || [];
+
+ // DocumentFragment
+ if (node.nodeType === Node.DOCUMENT_FRAGMENT_NODE) {
+ var nodeChildElements = nodeChildNodes.filter(isElementNode);
+ // If node has more than one element child or has a Text node child.
+ if (nodeChildElements.length > 1 || find(nodeChildNodes, isTextNode)) {
+ throw new DOMException(HIERARCHY_REQUEST_ERR, 'More than one element or text in fragment');
+ }
+ // Otherwise, if `node` has one element child and either `parent` has an element child,
+ // `child` is a doctype, or `child` is non-null and a doctype is following `child`.
+ if (nodeChildElements.length === 1 && !isElementInsertionPossible(parent, child)) {
+ throw new DOMException(HIERARCHY_REQUEST_ERR, 'Element in fragment can not be inserted before doctype');
+ }
+ }
+ // Element
+ if (isElementNode(node)) {
+ // `parent` has an element child, `child` is a doctype,
+ // or `child` is non-null and a doctype is following `child`.
+ if (!isElementInsertionPossible(parent, child)) {
+ throw new DOMException(HIERARCHY_REQUEST_ERR, 'Only one element can be added and only after doctype');
+ }
+ }
+ // DocumentType
+ if (isDocTypeNode(node)) {
+ // `parent` has a doctype child,
+ if (find(parentChildNodes, isDocTypeNode)) {
+ throw new DOMException(HIERARCHY_REQUEST_ERR, 'Only one doctype is allowed');
+ }
+ var parentElementChild = find(parentChildNodes, isElementNode);
+ // `child` is non-null and an element is preceding `child`,
+ if (child && parentChildNodes.indexOf(parentElementChild) < parentChildNodes.indexOf(child)) {
+ throw new DOMException(HIERARCHY_REQUEST_ERR, 'Doctype can only be inserted before an element');
+ }
+ // or `child` is null and `parent` has an element child.
+ if (!child && parentElementChild) {
+ throw new DOMException(HIERARCHY_REQUEST_ERR, 'Doctype can not be appended since element is present');
+ }
+ }
+ }
+
+ /**
+ * @private
+ * Step 6 of the checks before inserting and before replacing a child are different.
+ *
+ * @param {Document} parent the parent node to insert `node` into
+ * @param {Node} node the node to insert
+ * @param {Node | undefined} child the node that should become the `nextSibling` of `node`
+ * @returns {Node}
+ * @throws DOMException for several node combinations that would create a DOM that is not well-formed.
+ * @throws DOMException if `child` is provided but is not a child of `parent`.
+ * @see https://dom.spec.whatwg.org/#concept-node-ensure-pre-insertion-validity
+ * @see https://dom.spec.whatwg.org/#concept-node-replace
+ */
+ function assertPreReplacementValidityInDocument(parent, node, child) {
+ var parentChildNodes = parent.childNodes || [];
+ var nodeChildNodes = node.childNodes || [];
+
+ // DocumentFragment
+ if (node.nodeType === Node.DOCUMENT_FRAGMENT_NODE) {
+ var nodeChildElements = nodeChildNodes.filter(isElementNode);
+ // If `node` has more than one element child or has a Text node child.
+ if (nodeChildElements.length > 1 || find(nodeChildNodes, isTextNode)) {
+ throw new DOMException(HIERARCHY_REQUEST_ERR, 'More than one element or text in fragment');
+ }
+ // Otherwise, if `node` has one element child and either `parent` has an element child that is not `child` or a doctype is following `child`.
+ if (nodeChildElements.length === 1 && !isElementReplacementPossible(parent, child)) {
+ throw new DOMException(HIERARCHY_REQUEST_ERR, 'Element in fragment can not be inserted before doctype');
+ }
+ }
+ // Element
+ if (isElementNode(node)) {
+ // `parent` has an element child that is not `child` or a doctype is following `child`.
+ if (!isElementReplacementPossible(parent, child)) {
+ throw new DOMException(HIERARCHY_REQUEST_ERR, 'Only one element can be added and only after doctype');
+ }
+ }
+ // DocumentType
+ if (isDocTypeNode(node)) {
+ function hasDoctypeChildThatIsNotChild(node) {
+ return isDocTypeNode(node) && node !== child;
+ }
+
+ // `parent` has a doctype child that is not `child`,
+ if (find(parentChildNodes, hasDoctypeChildThatIsNotChild)) {
+ throw new DOMException(HIERARCHY_REQUEST_ERR, 'Only one doctype is allowed');
+ }
+ var parentElementChild = find(parentChildNodes, isElementNode);
+ // or an element is preceding `child`.
+ if (child && parentChildNodes.indexOf(parentElementChild) < parentChildNodes.indexOf(child)) {
+ throw new DOMException(HIERARCHY_REQUEST_ERR, 'Doctype can only be inserted before an element');
+ }
+ }
+ }
+
+ /**
+ * @private
+ * @param {Node} parent the parent node to insert `node` into
+ * @param {Node} node the node to insert
+ * @param {Node=} child the node that should become the `nextSibling` of `node`
+ * @returns {Node}
+ * @throws DOMException for several node combinations that would create a DOM that is not well-formed.
+ * @throws DOMException if `child` is provided but is not a child of `parent`.
+ * @see https://dom.spec.whatwg.org/#concept-node-ensure-pre-insertion-validity
+ */
+ function _insertBefore(parent, node, child, _inDocumentAssertion) {
+ // To ensure pre-insertion validity of a node into a parent before a child, run these steps:
+ assertPreInsertionValidity1to5(parent, node, child);
+
+ // If parent is a document, and any of the statements below, switched on the interface node implements,
+ // are true, then throw a "HierarchyRequestError" DOMException.
+ if (parent.nodeType === Node.DOCUMENT_NODE) {
+ (_inDocumentAssertion || assertPreInsertionValidityInDocument)(parent, node, child);
+ }
+ var cp = node.parentNode;
+ if (cp) {
+ cp.removeChild(node); //remove and update
+ }
+
+ if (node.nodeType === DOCUMENT_FRAGMENT_NODE) {
+ var newFirst = node.firstChild;
+ if (newFirst == null) {
+ return node;
+ }
+ var newLast = node.lastChild;
+ } else {
+ newFirst = newLast = node;
+ }
+ var pre = child ? child.previousSibling : parent.lastChild;
+ newFirst.previousSibling = pre;
+ newLast.nextSibling = child;
+ if (pre) {
+ pre.nextSibling = newFirst;
+ } else {
+ parent.firstChild = newFirst;
+ }
+ if (child == null) {
+ parent.lastChild = newLast;
+ } else {
+ child.previousSibling = newLast;
+ }
+ do {
+ newFirst.parentNode = parent;
+ } while (newFirst !== newLast && (newFirst = newFirst.nextSibling));
+ _onUpdateChild(parent.ownerDocument || parent, parent);
+ //console.log(parent.lastChild.nextSibling == null)
+ if (node.nodeType == DOCUMENT_FRAGMENT_NODE) {
+ node.firstChild = node.lastChild = null;
+ }
+ return node;
+ }
+
+ /**
+ * Appends `newChild` to `parentNode`.
+ * If `newChild` is already connected to a `parentNode` it is first removed from it.
+ *
+ * @see https://github.com/xmldom/xmldom/issues/135
+ * @see https://github.com/xmldom/xmldom/issues/145
+ * @param {Node} parentNode
+ * @param {Node} newChild
+ * @returns {Node}
+ * @private
+ */
+ function _appendSingleChild(parentNode, newChild) {
+ if (newChild.parentNode) {
+ newChild.parentNode.removeChild(newChild);
+ }
+ newChild.parentNode = parentNode;
+ newChild.previousSibling = parentNode.lastChild;
+ newChild.nextSibling = null;
+ if (newChild.previousSibling) {
+ newChild.previousSibling.nextSibling = newChild;
+ } else {
+ parentNode.firstChild = newChild;
+ }
+ parentNode.lastChild = newChild;
+ _onUpdateChild(parentNode.ownerDocument, parentNode, newChild);
+ return newChild;
+ }
+ Document.prototype = {
+ //implementation : null,
+ nodeName: '#document',
+ nodeType: DOCUMENT_NODE,
+ /**
+ * The DocumentType node of the document.
+ *
+ * @readonly
+ * @type DocumentType
+ */
+ doctype: null,
+ documentElement: null,
+ _inc: 1,
+ insertBefore: function (newChild, refChild) {
+ //raises
+ if (newChild.nodeType == DOCUMENT_FRAGMENT_NODE) {
+ var child = newChild.firstChild;
+ while (child) {
+ var next = child.nextSibling;
+ this.insertBefore(child, refChild);
+ child = next;
+ }
+ return newChild;
+ }
+ _insertBefore(this, newChild, refChild);
+ newChild.ownerDocument = this;
+ if (this.documentElement === null && newChild.nodeType === ELEMENT_NODE) {
+ this.documentElement = newChild;
+ }
+ return newChild;
+ },
+ removeChild: function (oldChild) {
+ if (this.documentElement == oldChild) {
+ this.documentElement = null;
+ }
+ return _removeChild(this, oldChild);
+ },
+ replaceChild: function (newChild, oldChild) {
+ //raises
+ _insertBefore(this, newChild, oldChild, assertPreReplacementValidityInDocument);
+ newChild.ownerDocument = this;
+ if (oldChild) {
+ this.removeChild(oldChild);
+ }
+ if (isElementNode(newChild)) {
+ this.documentElement = newChild;
+ }
+ },
+ // Introduced in DOM Level 2:
+ importNode: function (importedNode, deep) {
+ return importNode(this, importedNode, deep);
+ },
+ // Introduced in DOM Level 2:
+ getElementById: function (id) {
+ var rtv = null;
+ _visitNode(this.documentElement, function (node) {
+ if (node.nodeType == ELEMENT_NODE) {
+ if (node.getAttribute('id') == id) {
+ rtv = node;
+ return true;
+ }
+ }
+ });
+ return rtv;
+ },
+ /**
+ * The `getElementsByClassName` method of `Document` interface returns an array-like object
+ * of all child elements which have **all** of the given class name(s).
+ *
+ * Returns an empty list if `classeNames` is an empty string or only contains HTML white space characters.
+ *
+ *
+ * Warning: This is a live LiveNodeList.
+ * Changes in the DOM will reflect in the array as the changes occur.
+ * If an element selected by this array no longer qualifies for the selector,
+ * it will automatically be removed. Be aware of this for iteration purposes.
+ *
+ * @param {string} classNames is a string representing the class name(s) to match; multiple class names are separated by (ASCII-)whitespace
+ *
+ * @see https://developer.mozilla.org/en-US/docs/Web/API/Document/getElementsByClassName
+ * @see https://dom.spec.whatwg.org/#concept-getelementsbyclassname
+ */
+ getElementsByClassName: function (classNames) {
+ var classNamesSet = toOrderedSet(classNames);
+ return new LiveNodeList(this, function (base) {
+ var ls = [];
+ if (classNamesSet.length > 0) {
+ _visitNode(base.documentElement, function (node) {
+ if (node !== base && node.nodeType === ELEMENT_NODE) {
+ var nodeClassNames = node.getAttribute('class');
+ // can be null if the attribute does not exist
+ if (nodeClassNames) {
+ // before splitting and iterating just compare them for the most common case
+ var matches = classNames === nodeClassNames;
+ if (!matches) {
+ var nodeClassNamesSet = toOrderedSet(nodeClassNames);
+ matches = classNamesSet.every(arrayIncludes(nodeClassNamesSet));
+ }
+ if (matches) {
+ ls.push(node);
+ }
+ }
+ }
+ });
+ }
+ return ls;
+ });
+ },
+ //document factory method:
+ createElement: function (tagName) {
+ var node = new Element();
+ node.ownerDocument = this;
+ node.nodeName = tagName;
+ node.tagName = tagName;
+ node.localName = tagName;
+ node.childNodes = new NodeList();
+ var attrs = node.attributes = new NamedNodeMap();
+ attrs._ownerElement = node;
+ return node;
+ },
+ createDocumentFragment: function () {
+ var node = new DocumentFragment();
+ node.ownerDocument = this;
+ node.childNodes = new NodeList();
+ return node;
+ },
+ createTextNode: function (data) {
+ var node = new Text();
+ node.ownerDocument = this;
+ node.appendData(data);
+ return node;
+ },
+ createComment: function (data) {
+ var node = new Comment();
+ node.ownerDocument = this;
+ node.appendData(data);
+ return node;
+ },
+ createCDATASection: function (data) {
+ var node = new CDATASection();
+ node.ownerDocument = this;
+ node.appendData(data);
+ return node;
+ },
+ createProcessingInstruction: function (target, data) {
+ var node = new ProcessingInstruction();
+ node.ownerDocument = this;
+ node.tagName = node.nodeName = node.target = target;
+ node.nodeValue = node.data = data;
+ return node;
+ },
+ createAttribute: function (name) {
+ var node = new Attr();
+ node.ownerDocument = this;
+ node.name = name;
+ node.nodeName = name;
+ node.localName = name;
+ node.specified = true;
+ return node;
+ },
+ createEntityReference: function (name) {
+ var node = new EntityReference();
+ node.ownerDocument = this;
+ node.nodeName = name;
+ return node;
+ },
+ // Introduced in DOM Level 2:
+ createElementNS: function (namespaceURI, qualifiedName) {
+ var node = new Element();
+ var pl = qualifiedName.split(':');
+ var attrs = node.attributes = new NamedNodeMap();
+ node.childNodes = new NodeList();
+ node.ownerDocument = this;
+ node.nodeName = qualifiedName;
+ node.tagName = qualifiedName;
+ node.namespaceURI = namespaceURI;
+ if (pl.length == 2) {
+ node.prefix = pl[0];
+ node.localName = pl[1];
+ } else {
+ //el.prefix = null;
+ node.localName = qualifiedName;
+ }
+ attrs._ownerElement = node;
+ return node;
+ },
+ // Introduced in DOM Level 2:
+ createAttributeNS: function (namespaceURI, qualifiedName) {
+ var node = new Attr();
+ var pl = qualifiedName.split(':');
+ node.ownerDocument = this;
+ node.nodeName = qualifiedName;
+ node.name = qualifiedName;
+ node.namespaceURI = namespaceURI;
+ node.specified = true;
+ if (pl.length == 2) {
+ node.prefix = pl[0];
+ node.localName = pl[1];
+ } else {
+ //el.prefix = null;
+ node.localName = qualifiedName;
+ }
+ return node;
+ }
+ };
+ _extends(Document, Node);
+ function Element() {
+ this._nsMap = {};
+ }
+ Element.prototype = {
+ nodeType: ELEMENT_NODE,
+ hasAttribute: function (name) {
+ return this.getAttributeNode(name) != null;
+ },
+ getAttribute: function (name) {
+ var attr = this.getAttributeNode(name);
+ return attr && attr.value || '';
+ },
+ getAttributeNode: function (name) {
+ return this.attributes.getNamedItem(name);
+ },
+ setAttribute: function (name, value) {
+ var attr = this.ownerDocument.createAttribute(name);
+ attr.value = attr.nodeValue = "" + value;
+ this.setAttributeNode(attr);
+ },
+ removeAttribute: function (name) {
+ var attr = this.getAttributeNode(name);
+ attr && this.removeAttributeNode(attr);
+ },
+ //four real opeartion method
+ appendChild: function (newChild) {
+ if (newChild.nodeType === DOCUMENT_FRAGMENT_NODE) {
+ return this.insertBefore(newChild, null);
+ } else {
+ return _appendSingleChild(this, newChild);
+ }
+ },
+ setAttributeNode: function (newAttr) {
+ return this.attributes.setNamedItem(newAttr);
+ },
+ setAttributeNodeNS: function (newAttr) {
+ return this.attributes.setNamedItemNS(newAttr);
+ },
+ removeAttributeNode: function (oldAttr) {
+ //console.log(this == oldAttr.ownerElement)
+ return this.attributes.removeNamedItem(oldAttr.nodeName);
+ },
+ //get real attribute name,and remove it by removeAttributeNode
+ removeAttributeNS: function (namespaceURI, localName) {
+ var old = this.getAttributeNodeNS(namespaceURI, localName);
+ old && this.removeAttributeNode(old);
+ },
+ hasAttributeNS: function (namespaceURI, localName) {
+ return this.getAttributeNodeNS(namespaceURI, localName) != null;
+ },
+ getAttributeNS: function (namespaceURI, localName) {
+ var attr = this.getAttributeNodeNS(namespaceURI, localName);
+ return attr && attr.value || '';
+ },
+ setAttributeNS: function (namespaceURI, qualifiedName, value) {
+ var attr = this.ownerDocument.createAttributeNS(namespaceURI, qualifiedName);
+ attr.value = attr.nodeValue = "" + value;
+ this.setAttributeNode(attr);
+ },
+ getAttributeNodeNS: function (namespaceURI, localName) {
+ return this.attributes.getNamedItemNS(namespaceURI, localName);
+ },
+ getElementsByTagName: function (tagName) {
+ return new LiveNodeList(this, function (base) {
+ var ls = [];
+ _visitNode(base, function (node) {
+ if (node !== base && node.nodeType == ELEMENT_NODE && (tagName === '*' || node.tagName == tagName)) {
+ ls.push(node);
+ }
+ });
+ return ls;
+ });
+ },
+ getElementsByTagNameNS: function (namespaceURI, localName) {
+ return new LiveNodeList(this, function (base) {
+ var ls = [];
+ _visitNode(base, function (node) {
+ if (node !== base && node.nodeType === ELEMENT_NODE && (namespaceURI === '*' || node.namespaceURI === namespaceURI) && (localName === '*' || node.localName == localName)) {
+ ls.push(node);
+ }
+ });
+ return ls;
+ });
+ }
+ };
+ Document.prototype.getElementsByTagName = Element.prototype.getElementsByTagName;
+ Document.prototype.getElementsByTagNameNS = Element.prototype.getElementsByTagNameNS;
+ _extends(Element, Node);
+ function Attr() {}
+ Attr.prototype.nodeType = ATTRIBUTE_NODE;
+ _extends(Attr, Node);
+ function CharacterData() {}
+ CharacterData.prototype = {
+ data: '',
+ substringData: function (offset, count) {
+ return this.data.substring(offset, offset + count);
+ },
+ appendData: function (text) {
+ text = this.data + text;
+ this.nodeValue = this.data = text;
+ this.length = text.length;
+ },
+ insertData: function (offset, text) {
+ this.replaceData(offset, 0, text);
+ },
+ appendChild: function (newChild) {
+ throw new Error(ExceptionMessage[HIERARCHY_REQUEST_ERR]);
+ },
+ deleteData: function (offset, count) {
+ this.replaceData(offset, count, "");
+ },
+ replaceData: function (offset, count, text) {
+ var start = this.data.substring(0, offset);
+ var end = this.data.substring(offset + count);
+ text = start + text + end;
+ this.nodeValue = this.data = text;
+ this.length = text.length;
+ }
+ };
+ _extends(CharacterData, Node);
+ function Text() {}
+ Text.prototype = {
+ nodeName: "#text",
+ nodeType: TEXT_NODE,
+ splitText: function (offset) {
+ var text = this.data;
+ var newText = text.substring(offset);
+ text = text.substring(0, offset);
+ this.data = this.nodeValue = text;
+ this.length = text.length;
+ var newNode = this.ownerDocument.createTextNode(newText);
+ if (this.parentNode) {
+ this.parentNode.insertBefore(newNode, this.nextSibling);
+ }
+ return newNode;
+ }
+ };
+ _extends(Text, CharacterData);
+ function Comment() {}
+ Comment.prototype = {
+ nodeName: "#comment",
+ nodeType: COMMENT_NODE
+ };
+ _extends(Comment, CharacterData);
+ function CDATASection() {}
+ CDATASection.prototype = {
+ nodeName: "#cdata-section",
+ nodeType: CDATA_SECTION_NODE
+ };
+ _extends(CDATASection, CharacterData);
+ function DocumentType() {}
+ DocumentType.prototype.nodeType = DOCUMENT_TYPE_NODE;
+ _extends(DocumentType, Node);
+ function Notation() {}
+ Notation.prototype.nodeType = NOTATION_NODE;
+ _extends(Notation, Node);
+ function Entity() {}
+ Entity.prototype.nodeType = ENTITY_NODE;
+ _extends(Entity, Node);
+ function EntityReference() {}
+ EntityReference.prototype.nodeType = ENTITY_REFERENCE_NODE;
+ _extends(EntityReference, Node);
+ function DocumentFragment() {}
+ DocumentFragment.prototype.nodeName = "#document-fragment";
+ DocumentFragment.prototype.nodeType = DOCUMENT_FRAGMENT_NODE;
+ _extends(DocumentFragment, Node);
+ function ProcessingInstruction() {}
+ ProcessingInstruction.prototype.nodeType = PROCESSING_INSTRUCTION_NODE;
+ _extends(ProcessingInstruction, Node);
+ function XMLSerializer() {}
+ XMLSerializer.prototype.serializeToString = function (node, isHtml, nodeFilter) {
+ return nodeSerializeToString.call(node, isHtml, nodeFilter);
+ };
+ Node.prototype.toString = nodeSerializeToString;
+ function nodeSerializeToString(isHtml, nodeFilter) {
+ var buf = [];
+ var refNode = this.nodeType == 9 && this.documentElement || this;
+ var prefix = refNode.prefix;
+ var uri = refNode.namespaceURI;
+ if (uri && prefix == null) {
+ //console.log(prefix)
+ var prefix = refNode.lookupPrefix(uri);
+ if (prefix == null) {
+ //isHTML = true;
+ var visibleNamespaces = [{
+ namespace: uri,
+ prefix: null
+ }
+ //{namespace:uri,prefix:''}
+ ];
+ }
+ }
+
+ serializeToString(this, buf, isHtml, nodeFilter, visibleNamespaces);
+ //console.log('###',this.nodeType,uri,prefix,buf.join(''))
+ return buf.join('');
+ }
+ function needNamespaceDefine(node, isHTML, visibleNamespaces) {
+ var prefix = node.prefix || '';
+ var uri = node.namespaceURI;
+ // According to [Namespaces in XML 1.0](https://www.w3.org/TR/REC-xml-names/#ns-using) ,
+ // and more specifically https://www.w3.org/TR/REC-xml-names/#nsc-NoPrefixUndecl :
+ // > In a namespace declaration for a prefix [...], the attribute value MUST NOT be empty.
+ // in a similar manner [Namespaces in XML 1.1](https://www.w3.org/TR/xml-names11/#ns-using)
+ // and more specifically https://www.w3.org/TR/xml-names11/#nsc-NSDeclared :
+ // > [...] Furthermore, the attribute value [...] must not be an empty string.
+ // so serializing empty namespace value like xmlns:ds="" would produce an invalid XML document.
+ if (!uri) {
+ return false;
+ }
+ if (prefix === "xml" && uri === NAMESPACE$2.XML || uri === NAMESPACE$2.XMLNS) {
+ return false;
+ }
+ var i = visibleNamespaces.length;
+ while (i--) {
+ var ns = visibleNamespaces[i];
+ // get namespace prefix
+ if (ns.prefix === prefix) {
+ return ns.namespace !== uri;
+ }
+ }
+ return true;
+ }
+ /**
+ * Well-formed constraint: No < in Attribute Values
+ * > The replacement text of any entity referred to directly or indirectly
+ * > in an attribute value must not contain a <.
+ * @see https://www.w3.org/TR/xml11/#CleanAttrVals
+ * @see https://www.w3.org/TR/xml11/#NT-AttValue
+ *
+ * Literal whitespace other than space that appear in attribute values
+ * are serialized as their entity references, so they will be preserved.
+ * (In contrast to whitespace literals in the input which are normalized to spaces)
+ * @see https://www.w3.org/TR/xml11/#AVNormalize
+ * @see https://w3c.github.io/DOM-Parsing/#serializing-an-element-s-attributes
+ */
+ function addSerializedAttribute(buf, qualifiedName, value) {
+ buf.push(' ', qualifiedName, '="', value.replace(/[<>&"\t\n\r]/g, _xmlEncoder), '"');
+ }
+ function serializeToString(node, buf, isHTML, nodeFilter, visibleNamespaces) {
+ if (!visibleNamespaces) {
+ visibleNamespaces = [];
+ }
+ if (nodeFilter) {
+ node = nodeFilter(node);
+ if (node) {
+ if (typeof node == 'string') {
+ buf.push(node);
+ return;
+ }
+ } else {
+ return;
+ }
+ //buf.sort.apply(attrs, attributeSorter);
+ }
+
+ switch (node.nodeType) {
+ case ELEMENT_NODE:
+ var attrs = node.attributes;
+ var len = attrs.length;
+ var child = node.firstChild;
+ var nodeName = node.tagName;
+ isHTML = NAMESPACE$2.isHTML(node.namespaceURI) || isHTML;
+ var prefixedNodeName = nodeName;
+ if (!isHTML && !node.prefix && node.namespaceURI) {
+ var defaultNS;
+ // lookup current default ns from `xmlns` attribute
+ for (var ai = 0; ai < attrs.length; ai++) {
+ if (attrs.item(ai).name === 'xmlns') {
+ defaultNS = attrs.item(ai).value;
+ break;
+ }
+ }
+ if (!defaultNS) {
+ // lookup current default ns in visibleNamespaces
+ for (var nsi = visibleNamespaces.length - 1; nsi >= 0; nsi--) {
+ var namespace = visibleNamespaces[nsi];
+ if (namespace.prefix === '' && namespace.namespace === node.namespaceURI) {
+ defaultNS = namespace.namespace;
+ break;
+ }
+ }
+ }
+ if (defaultNS !== node.namespaceURI) {
+ for (var nsi = visibleNamespaces.length - 1; nsi >= 0; nsi--) {
+ var namespace = visibleNamespaces[nsi];
+ if (namespace.namespace === node.namespaceURI) {
+ if (namespace.prefix) {
+ prefixedNodeName = namespace.prefix + ':' + nodeName;
+ }
+ break;
+ }
+ }
+ }
+ }
+ buf.push('<', prefixedNodeName);
+ for (var i = 0; i < len; i++) {
+ // add namespaces for attributes
+ var attr = attrs.item(i);
+ if (attr.prefix == 'xmlns') {
+ visibleNamespaces.push({
+ prefix: attr.localName,
+ namespace: attr.value
+ });
+ } else if (attr.nodeName == 'xmlns') {
+ visibleNamespaces.push({
+ prefix: '',
+ namespace: attr.value
+ });
+ }
+ }
+ for (var i = 0; i < len; i++) {
+ var attr = attrs.item(i);
+ if (needNamespaceDefine(attr, isHTML, visibleNamespaces)) {
+ var prefix = attr.prefix || '';
+ var uri = attr.namespaceURI;
+ addSerializedAttribute(buf, prefix ? 'xmlns:' + prefix : "xmlns", uri);
+ visibleNamespaces.push({
+ prefix: prefix,
+ namespace: uri
+ });
+ }
+ serializeToString(attr, buf, isHTML, nodeFilter, visibleNamespaces);
+ }
+
+ // add namespace for current node
+ if (nodeName === prefixedNodeName && needNamespaceDefine(node, isHTML, visibleNamespaces)) {
+ var prefix = node.prefix || '';
+ var uri = node.namespaceURI;
+ addSerializedAttribute(buf, prefix ? 'xmlns:' + prefix : "xmlns", uri);
+ visibleNamespaces.push({
+ prefix: prefix,
+ namespace: uri
+ });
+ }
+ if (child || isHTML && !/^(?:meta|link|img|br|hr|input)$/i.test(nodeName)) {
+ buf.push('>');
+ //if is cdata child node
+ if (isHTML && /^script$/i.test(nodeName)) {
+ while (child) {
+ if (child.data) {
+ buf.push(child.data);
+ } else {
+ serializeToString(child, buf, isHTML, nodeFilter, visibleNamespaces.slice());
+ }
+ child = child.nextSibling;
+ }
+ } else {
+ while (child) {
+ serializeToString(child, buf, isHTML, nodeFilter, visibleNamespaces.slice());
+ child = child.nextSibling;
+ }
+ }
+ buf.push('</', prefixedNodeName, '>');
+ } else {
+ buf.push('/>');
+ }
+ // remove added visible namespaces
+ //visibleNamespaces.length = startVisibleNamespaces;
+ return;
+ case DOCUMENT_NODE:
+ case DOCUMENT_FRAGMENT_NODE:
+ var child = node.firstChild;
+ while (child) {
+ serializeToString(child, buf, isHTML, nodeFilter, visibleNamespaces.slice());
+ child = child.nextSibling;
+ }
+ return;
+ case ATTRIBUTE_NODE:
+ return addSerializedAttribute(buf, node.name, node.value);
+ case TEXT_NODE:
+ /**
+ * The ampersand character (&) and the left angle bracket (<) must not appear in their literal form,
+ * except when used as markup delimiters, or within a comment, a processing instruction, or a CDATA section.
+ * If they are needed elsewhere, they must be escaped using either numeric character references or the strings
+ * `&amp;` and `&lt;` respectively.
+ * The right angle bracket (>) may be represented using the string " &gt; ", and must, for compatibility,
+ * be escaped using either `&gt;` or a character reference when it appears in the string `]]>` in content,
+ * when that string is not marking the end of a CDATA section.
+ *
+ * In the content of elements, character data is any string of characters
+ * which does not contain the start-delimiter of any markup
+ * and does not include the CDATA-section-close delimiter, `]]>`.
+ *
+ * @see https://www.w3.org/TR/xml/#NT-CharData
+ * @see https://w3c.github.io/DOM-Parsing/#xml-serializing-a-text-node
+ */
+ return buf.push(node.data.replace(/[<&>]/g, _xmlEncoder));
+ case CDATA_SECTION_NODE:
+ return buf.push('<![CDATA[', node.data, ']]>');
+ case COMMENT_NODE:
+ return buf.push("<!--", node.data, "-->");
+ case DOCUMENT_TYPE_NODE:
+ var pubid = node.publicId;
+ var sysid = node.systemId;
+ buf.push('<!DOCTYPE ', node.name);
+ if (pubid) {
+ buf.push(' PUBLIC ', pubid);
+ if (sysid && sysid != '.') {
+ buf.push(' ', sysid);
+ }
+ buf.push('>');
+ } else if (sysid && sysid != '.') {
+ buf.push(' SYSTEM ', sysid, '>');
+ } else {
+ var sub = node.internalSubset;
+ if (sub) {
+ buf.push(" [", sub, "]");
+ }
+ buf.push(">");
+ }
+ return;
+ case PROCESSING_INSTRUCTION_NODE:
+ return buf.push("<?", node.target, " ", node.data, "?>");
+ case ENTITY_REFERENCE_NODE:
+ return buf.push('&', node.nodeName, ';');
+ //case ENTITY_NODE:
+ //case NOTATION_NODE:
+ default:
+ buf.push('??', node.nodeName);
+ }
+ }
+ function importNode(doc, node, deep) {
+ var node2;
+ switch (node.nodeType) {
+ case ELEMENT_NODE:
+ node2 = node.cloneNode(false);
+ node2.ownerDocument = doc;
+ //var attrs = node2.attributes;
+ //var len = attrs.length;
+ //for(var i=0;i<len;i++){
+ //node2.setAttributeNodeNS(importNode(doc,attrs.item(i),deep));
+ //}
+ case DOCUMENT_FRAGMENT_NODE:
+ break;
+ case ATTRIBUTE_NODE:
+ deep = true;
+ break;
+ //case ENTITY_REFERENCE_NODE:
+ //case PROCESSING_INSTRUCTION_NODE:
+ ////case TEXT_NODE:
+ //case CDATA_SECTION_NODE:
+ //case COMMENT_NODE:
+ // deep = false;
+ // break;
+ //case DOCUMENT_NODE:
+ //case DOCUMENT_TYPE_NODE:
+ //cannot be imported.
+ //case ENTITY_NODE:
+ //case NOTATION_NODE：
+ //can not hit in level3
+ //default:throw e;
+ }
+
+ if (!node2) {
+ node2 = node.cloneNode(false); //false
+ }
+
+ node2.ownerDocument = doc;
+ node2.parentNode = null;
+ if (deep) {
+ var child = node.firstChild;
+ while (child) {
+ node2.appendChild(importNode(doc, child, deep));
+ child = child.nextSibling;
+ }
+ }
+ return node2;
+ }
+ //
+ //var _relationMap = {firstChild:1,lastChild:1,previousSibling:1,nextSibling:1,
+ // attributes:1,childNodes:1,parentNode:1,documentElement:1,doctype,};
+ function cloneNode(doc, node, deep) {
+ var node2 = new node.constructor();
+ for (var n in node) {
+ if (Object.prototype.hasOwnProperty.call(node, n)) {
+ var v = node[n];
+ if (typeof v != "object") {
+ if (v != node2[n]) {
+ node2[n] = v;
+ }
+ }
+ }
+ }
+ if (node.childNodes) {
+ node2.childNodes = new NodeList();
+ }
+ node2.ownerDocument = doc;
+ switch (node2.nodeType) {
+ case ELEMENT_NODE:
+ var attrs = node.attributes;
+ var attrs2 = node2.attributes = new NamedNodeMap();
+ var len = attrs.length;
+ attrs2._ownerElement = node2;
+ for (var i = 0; i < len; i++) {
+ node2.setAttributeNode(cloneNode(doc, attrs.item(i), true));
+ }
+ break;
+ case ATTRIBUTE_NODE:
+ deep = true;
+ }
+ if (deep) {
+ var child = node.firstChild;
+ while (child) {
+ node2.appendChild(cloneNode(doc, child, deep));
+ child = child.nextSibling;
+ }
+ }
+ return node2;
+ }
+ function __set__(object, key, value) {
+ object[key] = value;
+ }
+ //do dynamic
+ try {
+ if (Object.defineProperty) {
+ Object.defineProperty(LiveNodeList.prototype, 'length', {
+ get: function () {
+ _updateLiveList(this);
+ return this.$$length;
+ }
+ });
+ Object.defineProperty(Node.prototype, 'textContent', {
+ get: function () {
+ return getTextContent(this);
+ },
+ set: function (data) {
+ switch (this.nodeType) {
+ case ELEMENT_NODE:
+ case DOCUMENT_FRAGMENT_NODE:
+ while (this.firstChild) {
+ this.removeChild(this.firstChild);
+ }
+ if (data || String(data)) {
+ this.appendChild(this.ownerDocument.createTextNode(data));
+ }
+ break;
+ default:
+ this.data = data;
+ this.value = data;
+ this.nodeValue = data;
+ }
+ }
+ });
+ function getTextContent(node) {
+ switch (node.nodeType) {
+ case ELEMENT_NODE:
+ case DOCUMENT_FRAGMENT_NODE:
+ var buf = [];
+ node = node.firstChild;
+ while (node) {
+ if (node.nodeType !== 7 && node.nodeType !== 8) {
+ buf.push(getTextContent(node));
+ }
+ node = node.nextSibling;
+ }
+ return buf.join('');
+ default:
+ return node.nodeValue;
+ }
+ }
+ __set__ = function (object, key, value) {
+ //console.log(value)
+ object['$$' + key] = value;
+ };
+ }
+ } catch (e) {//ie8
+ }
+
+ //if(typeof require == 'function'){
+ var DocumentType_1 = DocumentType;
+ var DOMException_1 = DOMException;
+ var DOMImplementation_1 = DOMImplementation$1;
+ var Element_1 = Element;
+ var Node_1 = Node;
+ var NodeList_1 = NodeList;
+ var XMLSerializer_1 = XMLSerializer;
+ //}
+
+ var dom = {
+ DocumentType: DocumentType_1,
+ DOMException: DOMException_1,
+ DOMImplementation: DOMImplementation_1,
+ Element: Element_1,
+ Node: Node_1,
+ NodeList: NodeList_1,
+ XMLSerializer: XMLSerializer_1
+ };
+
+ var entities = createCommonjsModule(function (module, exports) {
+
+ var freeze = conventions.freeze;
+
+ /**
+ * The entities that are predefined in every XML document.
+ *
+ * @see https://www.w3.org/TR/2006/REC-xml11-20060816/#sec-predefined-ent W3C XML 1.1
+ * @see https://www.w3.org/TR/2008/REC-xml-20081126/#sec-predefined-ent W3C XML 1.0
+ * @see https://en.wikipedia.org/wiki/List_of_XML_and_HTML_character_entity_references#Predefined_entities_in_XML Wikipedia
+ */
+ exports.XML_ENTITIES = freeze({
+ amp: '&',
+ apos: "'",
+ gt: '>',
+ lt: '<',
+ quot: '"'
+ });
+
+ /**
+ * A map of all entities that are detected in an HTML document.
+ * They contain all entries from `XML_ENTITIES`.
+ *
+ * @see XML_ENTITIES
+ * @see DOMParser.parseFromString
+ * @see DOMImplementation.prototype.createHTMLDocument
+ * @see https://html.spec.whatwg.org/#named-character-references WHATWG HTML(5) Spec
+ * @see https://html.spec.whatwg.org/entities.json JSON
+ * @see https://www.w3.org/TR/xml-entity-names/ W3C XML Entity Names
+ * @see https://www.w3.org/TR/html4/sgml/entities.html W3C HTML4/SGML
+ * @see https://en.wikipedia.org/wiki/List_of_XML_and_HTML_character_entity_references#Character_entity_references_in_HTML Wikipedia (HTML)
+ * @see https://en.wikipedia.org/wiki/List_of_XML_and_HTML_character_entity_references#Entities_representing_special_characters_in_XHTML Wikpedia (XHTML)
+ */
+ exports.HTML_ENTITIES = freeze({
+ Aacute: '\u00C1',
+ aacute: '\u00E1',
+ Abreve: '\u0102',
+ abreve: '\u0103',
+ ac: '\u223E',
+ acd: '\u223F',
+ acE: '\u223E\u0333',
+ Acirc: '\u00C2',
+ acirc: '\u00E2',
+ acute: '\u00B4',
+ Acy: '\u0410',
+ acy: '\u0430',
+ AElig: '\u00C6',
+ aelig: '\u00E6',
+ af: '\u2061',
+ Afr: '\uD835\uDD04',
+ afr: '\uD835\uDD1E',
+ Agrave: '\u00C0',
+ agrave: '\u00E0',
+ alefsym: '\u2135',
+ aleph: '\u2135',
+ Alpha: '\u0391',
+ alpha: '\u03B1',
+ Amacr: '\u0100',
+ amacr: '\u0101',
+ amalg: '\u2A3F',
+ AMP: '\u0026',
+ amp: '\u0026',
+ And: '\u2A53',
+ and: '\u2227',
+ andand: '\u2A55',
+ andd: '\u2A5C',
+ andslope: '\u2A58',
+ andv: '\u2A5A',
+ ang: '\u2220',
+ ange: '\u29A4',
+ angle: '\u2220',
+ angmsd: '\u2221',
+ angmsdaa: '\u29A8',
+ angmsdab: '\u29A9',
+ angmsdac: '\u29AA',
+ angmsdad: '\u29AB',
+ angmsdae: '\u29AC',
+ angmsdaf: '\u29AD',
+ angmsdag: '\u29AE',
+ angmsdah: '\u29AF',
+ angrt: '\u221F',
+ angrtvb: '\u22BE',
+ angrtvbd: '\u299D',
+ angsph: '\u2222',
+ angst: '\u00C5',
+ angzarr: '\u237C',
+ Aogon: '\u0104',
+ aogon: '\u0105',
+ Aopf: '\uD835\uDD38',
+ aopf: '\uD835\uDD52',
+ ap: '\u2248',
+ apacir: '\u2A6F',
+ apE: '\u2A70',
+ ape: '\u224A',
+ apid: '\u224B',
+ apos: '\u0027',
+ ApplyFunction: '\u2061',
+ approx: '\u2248',
+ approxeq: '\u224A',
+ Aring: '\u00C5',
+ aring: '\u00E5',
+ Ascr: '\uD835\uDC9C',
+ ascr: '\uD835\uDCB6',
+ Assign: '\u2254',
+ ast: '\u002A',
+ asymp: '\u2248',
+ asympeq: '\u224D',
+ Atilde: '\u00C3',
+ atilde: '\u00E3',
+ Auml: '\u00C4',
+ auml: '\u00E4',
+ awconint: '\u2233',
+ awint: '\u2A11',
+ backcong: '\u224C',
+ backepsilon: '\u03F6',
+ backprime: '\u2035',
+ backsim: '\u223D',
+ backsimeq: '\u22CD',
+ Backslash: '\u2216',
+ Barv: '\u2AE7',
+ barvee: '\u22BD',
+ Barwed: '\u2306',
+ barwed: '\u2305',
+ barwedge: '\u2305',
+ bbrk: '\u23B5',
+ bbrktbrk: '\u23B6',
+ bcong: '\u224C',
+ Bcy: '\u0411',
+ bcy: '\u0431',
+ bdquo: '\u201E',
+ becaus: '\u2235',
+ Because: '\u2235',
+ because: '\u2235',
+ bemptyv: '\u29B0',
+ bepsi: '\u03F6',
+ bernou: '\u212C',
+ Bernoullis: '\u212C',
+ Beta: '\u0392',
+ beta: '\u03B2',
+ beth: '\u2136',
+ between: '\u226C',
+ Bfr: '\uD835\uDD05',
+ bfr: '\uD835\uDD1F',
+ bigcap: '\u22C2',
+ bigcirc: '\u25EF',
+ bigcup: '\u22C3',
+ bigodot: '\u2A00',
+ bigoplus: '\u2A01',
+ bigotimes: '\u2A02',
+ bigsqcup: '\u2A06',
+ bigstar: '\u2605',
+ bigtriangledown: '\u25BD',
+ bigtriangleup: '\u25B3',
+ biguplus: '\u2A04',
+ bigvee: '\u22C1',
+ bigwedge: '\u22C0',
+ bkarow: '\u290D',
+ blacklozenge: '\u29EB',
+ blacksquare: '\u25AA',
+ blacktriangle: '\u25B4',
+ blacktriangledown: '\u25BE',
+ blacktriangleleft: '\u25C2',
+ blacktriangleright: '\u25B8',
+ blank: '\u2423',
+ blk12: '\u2592',
+ blk14: '\u2591',
+ blk34: '\u2593',
+ block: '\u2588',
+ bne: '\u003D\u20E5',
+ bnequiv: '\u2261\u20E5',
+ bNot: '\u2AED',
+ bnot: '\u2310',
+ Bopf: '\uD835\uDD39',
+ bopf: '\uD835\uDD53',
+ bot: '\u22A5',
+ bottom: '\u22A5',
+ bowtie: '\u22C8',
+ boxbox: '\u29C9',
+ boxDL: '\u2557',
+ boxDl: '\u2556',
+ boxdL: '\u2555',
+ boxdl: '\u2510',
+ boxDR: '\u2554',
+ boxDr: '\u2553',
+ boxdR: '\u2552',
+ boxdr: '\u250C',
+ boxH: '\u2550',
+ boxh: '\u2500',
+ boxHD: '\u2566',
+ boxHd: '\u2564',
+ boxhD: '\u2565',
+ boxhd: '\u252C',
+ boxHU: '\u2569',
+ boxHu: '\u2567',
+ boxhU: '\u2568',
+ boxhu: '\u2534',
+ boxminus: '\u229F',
+ boxplus: '\u229E',
+ boxtimes: '\u22A0',
+ boxUL: '\u255D',
+ boxUl: '\u255C',
+ boxuL: '\u255B',
+ boxul: '\u2518',
+ boxUR: '\u255A',
+ boxUr: '\u2559',
+ boxuR: '\u2558',
+ boxur: '\u2514',
+ boxV: '\u2551',
+ boxv: '\u2502',
+ boxVH: '\u256C',
+ boxVh: '\u256B',
+ boxvH: '\u256A',
+ boxvh: '\u253C',
+ boxVL: '\u2563',
+ boxVl: '\u2562',
+ boxvL: '\u2561',
+ boxvl: '\u2524',
+ boxVR: '\u2560',
+ boxVr: '\u255F',
+ boxvR: '\u255E',
+ boxvr: '\u251C',
+ bprime: '\u2035',
+ Breve: '\u02D8',
+ breve: '\u02D8',
+ brvbar: '\u00A6',
+ Bscr: '\u212C',
+ bscr: '\uD835\uDCB7',
+ bsemi: '\u204F',
+ bsim: '\u223D',
+ bsime: '\u22CD',
+ bsol: '\u005C',
+ bsolb: '\u29C5',
+ bsolhsub: '\u27C8',
+ bull: '\u2022',
+ bullet: '\u2022',
+ bump: '\u224E',
+ bumpE: '\u2AAE',
+ bumpe: '\u224F',
+ Bumpeq: '\u224E',
+ bumpeq: '\u224F',
+ Cacute: '\u0106',
+ cacute: '\u0107',
+ Cap: '\u22D2',
+ cap: '\u2229',
+ capand: '\u2A44',
+ capbrcup: '\u2A49',
+ capcap: '\u2A4B',
+ capcup: '\u2A47',
+ capdot: '\u2A40',
+ CapitalDifferentialD: '\u2145',
+ caps: '\u2229\uFE00',
+ caret: '\u2041',
+ caron: '\u02C7',
+ Cayleys: '\u212D',
+ ccaps: '\u2A4D',
+ Ccaron: '\u010C',
+ ccaron: '\u010D',
+ Ccedil: '\u00C7',
+ ccedil: '\u00E7',
+ Ccirc: '\u0108',
+ ccirc: '\u0109',
+ Cconint: '\u2230',
+ ccups: '\u2A4C',
+ ccupssm: '\u2A50',
+ Cdot: '\u010A',
+ cdot: '\u010B',
+ cedil: '\u00B8',
+ Cedilla: '\u00B8',
+ cemptyv: '\u29B2',
+ cent: '\u00A2',
+ CenterDot: '\u00B7',
+ centerdot: '\u00B7',
+ Cfr: '\u212D',
+ cfr: '\uD835\uDD20',
+ CHcy: '\u0427',
+ chcy: '\u0447',
+ check: '\u2713',
+ checkmark: '\u2713',
+ Chi: '\u03A7',
+ chi: '\u03C7',
+ cir: '\u25CB',
+ circ: '\u02C6',
+ circeq: '\u2257',
+ circlearrowleft: '\u21BA',
+ circlearrowright: '\u21BB',
+ circledast: '\u229B',
+ circledcirc: '\u229A',
+ circleddash: '\u229D',
+ CircleDot: '\u2299',
+ circledR: '\u00AE',
+ circledS: '\u24C8',
+ CircleMinus: '\u2296',
+ CirclePlus: '\u2295',
+ CircleTimes: '\u2297',
+ cirE: '\u29C3',
+ cire: '\u2257',
+ cirfnint: '\u2A10',
+ cirmid: '\u2AEF',
+ cirscir: '\u29C2',
+ ClockwiseContourIntegral: '\u2232',
+ CloseCurlyDoubleQuote: '\u201D',
+ CloseCurlyQuote: '\u2019',
+ clubs: '\u2663',
+ clubsuit: '\u2663',
+ Colon: '\u2237',
+ colon: '\u003A',
+ Colone: '\u2A74',
+ colone: '\u2254',
+ coloneq: '\u2254',
+ comma: '\u002C',
+ commat: '\u0040',
+ comp: '\u2201',
+ compfn: '\u2218',
+ complement: '\u2201',
+ complexes: '\u2102',
+ cong: '\u2245',
+ congdot: '\u2A6D',
+ Congruent: '\u2261',
+ Conint: '\u222F',
+ conint: '\u222E',
+ ContourIntegral: '\u222E',
+ Copf: '\u2102',
+ copf: '\uD835\uDD54',
+ coprod: '\u2210',
+ Coproduct: '\u2210',
+ COPY: '\u00A9',
+ copy: '\u00A9',
+ copysr: '\u2117',
+ CounterClockwiseContourIntegral: '\u2233',
+ crarr: '\u21B5',
+ Cross: '\u2A2F',
+ cross: '\u2717',
+ Cscr: '\uD835\uDC9E',
+ cscr: '\uD835\uDCB8',
+ csub: '\u2ACF',
+ csube: '\u2AD1',
+ csup: '\u2AD0',
+ csupe: '\u2AD2',
+ ctdot: '\u22EF',
+ cudarrl: '\u2938',
+ cudarrr: '\u2935',
+ cuepr: '\u22DE',
+ cuesc: '\u22DF',
+ cularr: '\u21B6',
+ cularrp: '\u293D',
+ Cup: '\u22D3',
+ cup: '\u222A',
+ cupbrcap: '\u2A48',
+ CupCap: '\u224D',
+ cupcap: '\u2A46',
+ cupcup: '\u2A4A',
+ cupdot: '\u228D',
+ cupor: '\u2A45',
+ cups: '\u222A\uFE00',
+ curarr: '\u21B7',
+ curarrm: '\u293C',
+ curlyeqprec: '\u22DE',
+ curlyeqsucc: '\u22DF',
+ curlyvee: '\u22CE',
+ curlywedge: '\u22CF',
+ curren: '\u00A4',
+ curvearrowleft: '\u21B6',
+ curvearrowright: '\u21B7',
+ cuvee: '\u22CE',
+ cuwed: '\u22CF',
+ cwconint: '\u2232',
+ cwint: '\u2231',
+ cylcty: '\u232D',
+ Dagger: '\u2021',
+ dagger: '\u2020',
+ daleth: '\u2138',
+ Darr: '\u21A1',
+ dArr: '\u21D3',
+ darr: '\u2193',
+ dash: '\u2010',
+ Dashv: '\u2AE4',
+ dashv: '\u22A3',
+ dbkarow: '\u290F',
+ dblac: '\u02DD',
+ Dcaron: '\u010E',
+ dcaron: '\u010F',
+ Dcy: '\u0414',
+ dcy: '\u0434',
+ DD: '\u2145',
+ dd: '\u2146',
+ ddagger: '\u2021',
+ ddarr: '\u21CA',
+ DDotrahd: '\u2911',
+ ddotseq: '\u2A77',
+ deg: '\u00B0',
+ Del: '\u2207',
+ Delta: '\u0394',
+ delta: '\u03B4',
+ demptyv: '\u29B1',
+ dfisht: '\u297F',
+ Dfr: '\uD835\uDD07',
+ dfr: '\uD835\uDD21',
+ dHar: '\u2965',
+ dharl: '\u21C3',
+ dharr: '\u21C2',
+ DiacriticalAcute: '\u00B4',
+ DiacriticalDot: '\u02D9',
+ DiacriticalDoubleAcute: '\u02DD',
+ DiacriticalGrave: '\u0060',
+ DiacriticalTilde: '\u02DC',
+ diam: '\u22C4',
+ Diamond: '\u22C4',
+ diamond: '\u22C4',
+ diamondsuit: '\u2666',
+ diams: '\u2666',
+ die: '\u00A8',
+ DifferentialD: '\u2146',
+ digamma: '\u03DD',
+ disin: '\u22F2',
+ div: '\u00F7',
+ divide: '\u00F7',
+ divideontimes: '\u22C7',
+ divonx: '\u22C7',
+ DJcy: '\u0402',
+ djcy: '\u0452',
+ dlcorn: '\u231E',
+ dlcrop: '\u230D',
+ dollar: '\u0024',
+ Dopf: '\uD835\uDD3B',
+ dopf: '\uD835\uDD55',
+ Dot: '\u00A8',
+ dot: '\u02D9',
+ DotDot: '\u20DC',
+ doteq: '\u2250',
+ doteqdot: '\u2251',
+ DotEqual: '\u2250',
+ dotminus: '\u2238',
+ dotplus: '\u2214',
+ dotsquare: '\u22A1',
+ doublebarwedge: '\u2306',
+ DoubleContourIntegral: '\u222F',
+ DoubleDot: '\u00A8',
+ DoubleDownArrow: '\u21D3',
+ DoubleLeftArrow: '\u21D0',
+ DoubleLeftRightArrow: '\u21D4',
+ DoubleLeftTee: '\u2AE4',
+ DoubleLongLeftArrow: '\u27F8',
+ DoubleLongLeftRightArrow: '\u27FA',
+ DoubleLongRightArrow: '\u27F9',
+ DoubleRightArrow: '\u21D2',
+ DoubleRightTee: '\u22A8',
+ DoubleUpArrow: '\u21D1',
+ DoubleUpDownArrow: '\u21D5',
+ DoubleVerticalBar: '\u2225',
+ DownArrow: '\u2193',
+ Downarrow: '\u21D3',
+ downarrow: '\u2193',
+ DownArrowBar: '\u2913',
+ DownArrowUpArrow: '\u21F5',
+ DownBreve: '\u0311',
+ downdownarrows: '\u21CA',
+ downharpoonleft: '\u21C3',
+ downharpoonright: '\u21C2',
+ DownLeftRightVector: '\u2950',
+ DownLeftTeeVector: '\u295E',
+ DownLeftVector: '\u21BD',
+ DownLeftVectorBar: '\u2956',
+ DownRightTeeVector: '\u295F',
+ DownRightVector: '\u21C1',
+ DownRightVectorBar: '\u2957',
+ DownTee: '\u22A4',
+ DownTeeArrow: '\u21A7',
+ drbkarow: '\u2910',
+ drcorn: '\u231F',
+ drcrop: '\u230C',
+ Dscr: '\uD835\uDC9F',
+ dscr: '\uD835\uDCB9',
+ DScy: '\u0405',
+ dscy: '\u0455',
+ dsol: '\u29F6',
+ Dstrok: '\u0110',
+ dstrok: '\u0111',
+ dtdot: '\u22F1',
+ dtri: '\u25BF',
+ dtrif: '\u25BE',
+ duarr: '\u21F5',
+ duhar: '\u296F',
+ dwangle: '\u29A6',
+ DZcy: '\u040F',
+ dzcy: '\u045F',
+ dzigrarr: '\u27FF',
+ Eacute: '\u00C9',
+ eacute: '\u00E9',
+ easter: '\u2A6E',
+ Ecaron: '\u011A',
+ ecaron: '\u011B',
+ ecir: '\u2256',
+ Ecirc: '\u00CA',
+ ecirc: '\u00EA',
+ ecolon: '\u2255',
+ Ecy: '\u042D',
+ ecy: '\u044D',
+ eDDot: '\u2A77',
+ Edot: '\u0116',
+ eDot: '\u2251',
+ edot: '\u0117',
+ ee: '\u2147',
+ efDot: '\u2252',
+ Efr: '\uD835\uDD08',
+ efr: '\uD835\uDD22',
+ eg: '\u2A9A',
+ Egrave: '\u00C8',
+ egrave: '\u00E8',
+ egs: '\u2A96',
+ egsdot: '\u2A98',
+ el: '\u2A99',
+ Element: '\u2208',
+ elinters: '\u23E7',
+ ell: '\u2113',
+ els: '\u2A95',
+ elsdot: '\u2A97',
+ Emacr: '\u0112',
+ emacr: '\u0113',
+ empty: '\u2205',
+ emptyset: '\u2205',
+ EmptySmallSquare: '\u25FB',
+ emptyv: '\u2205',
+ EmptyVerySmallSquare: '\u25AB',
+ emsp: '\u2003',
+ emsp13: '\u2004',
+ emsp14: '\u2005',
+ ENG: '\u014A',
+ eng: '\u014B',
+ ensp: '\u2002',
+ Eogon: '\u0118',
+ eogon: '\u0119',
+ Eopf: '\uD835\uDD3C',
+ eopf: '\uD835\uDD56',
+ epar: '\u22D5',
+ eparsl: '\u29E3',
+ eplus: '\u2A71',
+ epsi: '\u03B5',
+ Epsilon: '\u0395',
+ epsilon: '\u03B5',
+ epsiv: '\u03F5',
+ eqcirc: '\u2256',
+ eqcolon: '\u2255',
+ eqsim: '\u2242',
+ eqslantgtr: '\u2A96',
+ eqslantless: '\u2A95',
+ Equal: '\u2A75',
+ equals: '\u003D',
+ EqualTilde: '\u2242',
+ equest: '\u225F',
+ Equilibrium: '\u21CC',
+ equiv: '\u2261',
+ equivDD: '\u2A78',
+ eqvparsl: '\u29E5',
+ erarr: '\u2971',
+ erDot: '\u2253',
+ Escr: '\u2130',
+ escr: '\u212F',
+ esdot: '\u2250',
+ Esim: '\u2A73',
+ esim: '\u2242',
+ Eta: '\u0397',
+ eta: '\u03B7',
+ ETH: '\u00D0',
+ eth: '\u00F0',
+ Euml: '\u00CB',
+ euml: '\u00EB',
+ euro: '\u20AC',
+ excl: '\u0021',
+ exist: '\u2203',
+ Exists: '\u2203',
+ expectation: '\u2130',
+ ExponentialE: '\u2147',
+ exponentiale: '\u2147',
+ fallingdotseq: '\u2252',
+ Fcy: '\u0424',
+ fcy: '\u0444',
+ female: '\u2640',
+ ffilig: '\uFB03',
+ fflig: '\uFB00',
+ ffllig: '\uFB04',
+ Ffr: '\uD835\uDD09',
+ ffr: '\uD835\uDD23',
+ filig: '\uFB01',
+ FilledSmallSquare: '\u25FC',
+ FilledVerySmallSquare: '\u25AA',
+ fjlig: '\u0066\u006A',
+ flat: '\u266D',
+ fllig: '\uFB02',
+ fltns: '\u25B1',
+ fnof: '\u0192',
+ Fopf: '\uD835\uDD3D',
+ fopf: '\uD835\uDD57',
+ ForAll: '\u2200',
+ forall: '\u2200',
+ fork: '\u22D4',
+ forkv: '\u2AD9',
+ Fouriertrf: '\u2131',
+ fpartint: '\u2A0D',
+ frac12: '\u00BD',
+ frac13: '\u2153',
+ frac14: '\u00BC',
+ frac15: '\u2155',
+ frac16: '\u2159',
+ frac18: '\u215B',
+ frac23: '\u2154',
+ frac25: '\u2156',
+ frac34: '\u00BE',
+ frac35: '\u2157',
+ frac38: '\u215C',
+ frac45: '\u2158',
+ frac56: '\u215A',
+ frac58: '\u215D',
+ frac78: '\u215E',
+ frasl: '\u2044',
+ frown: '\u2322',
+ Fscr: '\u2131',
+ fscr: '\uD835\uDCBB',
+ gacute: '\u01F5',
+ Gamma: '\u0393',
+ gamma: '\u03B3',
+ Gammad: '\u03DC',
+ gammad: '\u03DD',
+ gap: '\u2A86',
+ Gbreve: '\u011E',
+ gbreve: '\u011F',
+ Gcedil: '\u0122',
+ Gcirc: '\u011C',
+ gcirc: '\u011D',
+ Gcy: '\u0413',
+ gcy: '\u0433',
+ Gdot: '\u0120',
+ gdot: '\u0121',
+ gE: '\u2267',
+ ge: '\u2265',
+ gEl: '\u2A8C',
+ gel: '\u22DB',
+ geq: '\u2265',
+ geqq: '\u2267',
+ geqslant: '\u2A7E',
+ ges: '\u2A7E',
+ gescc: '\u2AA9',
+ gesdot: '\u2A80',
+ gesdoto: '\u2A82',
+ gesdotol: '\u2A84',
+ gesl: '\u22DB\uFE00',
+ gesles: '\u2A94',
+ Gfr: '\uD835\uDD0A',
+ gfr: '\uD835\uDD24',
+ Gg: '\u22D9',
+ gg: '\u226B',
+ ggg: '\u22D9',
+ gimel: '\u2137',
+ GJcy: '\u0403',
+ gjcy: '\u0453',
+ gl: '\u2277',
+ gla: '\u2AA5',
+ glE: '\u2A92',
+ glj: '\u2AA4',
+ gnap: '\u2A8A',
+ gnapprox: '\u2A8A',
+ gnE: '\u2269',
+ gne: '\u2A88',
+ gneq: '\u2A88',
+ gneqq: '\u2269',
+ gnsim: '\u22E7',
+ Gopf: '\uD835\uDD3E',
+ gopf: '\uD835\uDD58',
+ grave: '\u0060',
+ GreaterEqual: '\u2265',
+ GreaterEqualLess: '\u22DB',
+ GreaterFullEqual: '\u2267',
+ GreaterGreater: '\u2AA2',
+ GreaterLess: '\u2277',
+ GreaterSlantEqual: '\u2A7E',
+ GreaterTilde: '\u2273',
+ Gscr: '\uD835\uDCA2',
+ gscr: '\u210A',
+ gsim: '\u2273',
+ gsime: '\u2A8E',
+ gsiml: '\u2A90',
+ Gt: '\u226B',
+ GT: '\u003E',
+ gt: '\u003E',
+ gtcc: '\u2AA7',
+ gtcir: '\u2A7A',
+ gtdot: '\u22D7',
+ gtlPar: '\u2995',
+ gtquest: '\u2A7C',
+ gtrapprox: '\u2A86',
+ gtrarr: '\u2978',
+ gtrdot: '\u22D7',
+ gtreqless: '\u22DB',
+ gtreqqless: '\u2A8C',
+ gtrless: '\u2277',
+ gtrsim: '\u2273',
+ gvertneqq: '\u2269\uFE00',
+ gvnE: '\u2269\uFE00',
+ Hacek: '\u02C7',
+ hairsp: '\u200A',
+ half: '\u00BD',
+ hamilt: '\u210B',
+ HARDcy: '\u042A',
+ hardcy: '\u044A',
+ hArr: '\u21D4',
+ harr: '\u2194',
+ harrcir: '\u2948',
+ harrw: '\u21AD',
+ Hat: '\u005E',
+ hbar: '\u210F',
+ Hcirc: '\u0124',
+ hcirc: '\u0125',
+ hearts: '\u2665',
+ heartsuit: '\u2665',
+ hellip: '\u2026',
+ hercon: '\u22B9',
+ Hfr: '\u210C',
+ hfr: '\uD835\uDD25',
+ HilbertSpace: '\u210B',
+ hksearow: '\u2925',
+ hkswarow: '\u2926',
+ hoarr: '\u21FF',
+ homtht: '\u223B',
+ hookleftarrow: '\u21A9',
+ hookrightarrow: '\u21AA',
+ Hopf: '\u210D',
+ hopf: '\uD835\uDD59',
+ horbar: '\u2015',
+ HorizontalLine: '\u2500',
+ Hscr: '\u210B',
+ hscr: '\uD835\uDCBD',
+ hslash: '\u210F',
+ Hstrok: '\u0126',
+ hstrok: '\u0127',
+ HumpDownHump: '\u224E',
+ HumpEqual: '\u224F',
+ hybull: '\u2043',
+ hyphen: '\u2010',
+ Iacute: '\u00CD',
+ iacute: '\u00ED',
+ ic: '\u2063',
+ Icirc: '\u00CE',
+ icirc: '\u00EE',
+ Icy: '\u0418',
+ icy: '\u0438',
+ Idot: '\u0130',
+ IEcy: '\u0415',
+ iecy: '\u0435',
+ iexcl: '\u00A1',
+ iff: '\u21D4',
+ Ifr: '\u2111',
+ ifr: '\uD835\uDD26',
+ Igrave: '\u00CC',
+ igrave: '\u00EC',
+ ii: '\u2148',
+ iiiint: '\u2A0C',
+ iiint: '\u222D',
+ iinfin: '\u29DC',
+ iiota: '\u2129',
+ IJlig: '\u0132',
+ ijlig: '\u0133',
+ Im: '\u2111',
+ Imacr: '\u012A',
+ imacr: '\u012B',
+ image: '\u2111',
+ ImaginaryI: '\u2148',
+ imagline: '\u2110',
+ imagpart: '\u2111',
+ imath: '\u0131',
+ imof: '\u22B7',
+ imped: '\u01B5',
+ Implies: '\u21D2',
+ in: '\u2208',
+ incare: '\u2105',
+ infin: '\u221E',
+ infintie: '\u29DD',
+ inodot: '\u0131',
+ Int: '\u222C',
+ int: '\u222B',
+ intcal: '\u22BA',
+ integers: '\u2124',
+ Integral: '\u222B',
+ intercal: '\u22BA',
+ Intersection: '\u22C2',
+ intlarhk: '\u2A17',
+ intprod: '\u2A3C',
+ InvisibleComma: '\u2063',
+ InvisibleTimes: '\u2062',
+ IOcy: '\u0401',
+ iocy: '\u0451',
+ Iogon: '\u012E',
+ iogon: '\u012F',
+ Iopf: '\uD835\uDD40',
+ iopf: '\uD835\uDD5A',
+ Iota: '\u0399',
+ iota: '\u03B9',
+ iprod: '\u2A3C',
+ iquest: '\u00BF',
+ Iscr: '\u2110',
+ iscr: '\uD835\uDCBE',
+ isin: '\u2208',
+ isindot: '\u22F5',
+ isinE: '\u22F9',
+ isins: '\u22F4',
+ isinsv: '\u22F3',
+ isinv: '\u2208',
+ it: '\u2062',
+ Itilde: '\u0128',
+ itilde: '\u0129',
+ Iukcy: '\u0406',
+ iukcy: '\u0456',
+ Iuml: '\u00CF',
+ iuml: '\u00EF',
+ Jcirc: '\u0134',
+ jcirc: '\u0135',
+ Jcy: '\u0419',
+ jcy: '\u0439',
+ Jfr: '\uD835\uDD0D',
+ jfr: '\uD835\uDD27',
+ jmath: '\u0237',
+ Jopf: '\uD835\uDD41',
+ jopf: '\uD835\uDD5B',
+ Jscr: '\uD835\uDCA5',
+ jscr: '\uD835\uDCBF',
+ Jsercy: '\u0408',
+ jsercy: '\u0458',
+ Jukcy: '\u0404',
+ jukcy: '\u0454',
+ Kappa: '\u039A',
+ kappa: '\u03BA',
+ kappav: '\u03F0',
+ Kcedil: '\u0136',
+ kcedil: '\u0137',
+ Kcy: '\u041A',
+ kcy: '\u043A',
+ Kfr: '\uD835\uDD0E',
+ kfr: '\uD835\uDD28',
+ kgreen: '\u0138',
+ KHcy: '\u0425',
+ khcy: '\u0445',
+ KJcy: '\u040C',
+ kjcy: '\u045C',
+ Kopf: '\uD835\uDD42',
+ kopf: '\uD835\uDD5C',
+ Kscr: '\uD835\uDCA6',
+ kscr: '\uD835\uDCC0',
+ lAarr: '\u21DA',
+ Lacute: '\u0139',
+ lacute: '\u013A',
+ laemptyv: '\u29B4',
+ lagran: '\u2112',
+ Lambda: '\u039B',
+ lambda: '\u03BB',
+ Lang: '\u27EA',
+ lang: '\u27E8',
+ langd: '\u2991',
+ langle: '\u27E8',
+ lap: '\u2A85',
+ Laplacetrf: '\u2112',
+ laquo: '\u00AB',
+ Larr: '\u219E',
+ lArr: '\u21D0',
+ larr: '\u2190',
+ larrb: '\u21E4',
+ larrbfs: '\u291F',
+ larrfs: '\u291D',
+ larrhk: '\u21A9',
+ larrlp: '\u21AB',
+ larrpl: '\u2939',
+ larrsim: '\u2973',
+ larrtl: '\u21A2',
+ lat: '\u2AAB',
+ lAtail: '\u291B',
+ latail: '\u2919',
+ late: '\u2AAD',
+ lates: '\u2AAD\uFE00',
+ lBarr: '\u290E',
+ lbarr: '\u290C',
+ lbbrk: '\u2772',
+ lbrace: '\u007B',
+ lbrack: '\u005B',
+ lbrke: '\u298B',
+ lbrksld: '\u298F',
+ lbrkslu: '\u298D',
+ Lcaron: '\u013D',
+ lcaron: '\u013E',
+ Lcedil: '\u013B',
+ lcedil: '\u013C',
+ lceil: '\u2308',
+ lcub: '\u007B',
+ Lcy: '\u041B',
+ lcy: '\u043B',
+ ldca: '\u2936',
+ ldquo: '\u201C',
+ ldquor: '\u201E',
+ ldrdhar: '\u2967',
+ ldrushar: '\u294B',
+ ldsh: '\u21B2',
+ lE: '\u2266',
+ le: '\u2264',
+ LeftAngleBracket: '\u27E8',
+ LeftArrow: '\u2190',
+ Leftarrow: '\u21D0',
+ leftarrow: '\u2190',
+ LeftArrowBar: '\u21E4',
+ LeftArrowRightArrow: '\u21C6',
+ leftarrowtail: '\u21A2',
+ LeftCeiling: '\u2308',
+ LeftDoubleBracket: '\u27E6',
+ LeftDownTeeVector: '\u2961',
+ LeftDownVector: '\u21C3',
+ LeftDownVectorBar: '\u2959',
+ LeftFloor: '\u230A',
+ leftharpoondown: '\u21BD',
+ leftharpoonup: '\u21BC',
+ leftleftarrows: '\u21C7',
+ LeftRightArrow: '\u2194',
+ Leftrightarrow: '\u21D4',
+ leftrightarrow: '\u2194',
+ leftrightarrows: '\u21C6',
+ leftrightharpoons: '\u21CB',
+ leftrightsquigarrow: '\u21AD',
+ LeftRightVector: '\u294E',
+ LeftTee: '\u22A3',
+ LeftTeeArrow: '\u21A4',
+ LeftTeeVector: '\u295A',
+ leftthreetimes: '\u22CB',
+ LeftTriangle: '\u22B2',
+ LeftTriangleBar: '\u29CF',
+ LeftTriangleEqual: '\u22B4',
+ LeftUpDownVector: '\u2951',
+ LeftUpTeeVector: '\u2960',
+ LeftUpVector: '\u21BF',
+ LeftUpVectorBar: '\u2958',
+ LeftVector: '\u21BC',
+ LeftVectorBar: '\u2952',
+ lEg: '\u2A8B',
+ leg: '\u22DA',
+ leq: '\u2264',
+ leqq: '\u2266',
+ leqslant: '\u2A7D',
+ les: '\u2A7D',
+ lescc: '\u2AA8',
+ lesdot: '\u2A7F',
+ lesdoto: '\u2A81',
+ lesdotor: '\u2A83',
+ lesg: '\u22DA\uFE00',
+ lesges: '\u2A93',
+ lessapprox: '\u2A85',
+ lessdot: '\u22D6',
+ lesseqgtr: '\u22DA',
+ lesseqqgtr: '\u2A8B',
+ LessEqualGreater: '\u22DA',
+ LessFullEqual: '\u2266',
+ LessGreater: '\u2276',
+ lessgtr: '\u2276',
+ LessLess: '\u2AA1',
+ lesssim: '\u2272',
+ LessSlantEqual: '\u2A7D',
+ LessTilde: '\u2272',
+ lfisht: '\u297C',
+ lfloor: '\u230A',
+ Lfr: '\uD835\uDD0F',
+ lfr: '\uD835\uDD29',
+ lg: '\u2276',
+ lgE: '\u2A91',
+ lHar: '\u2962',
+ lhard: '\u21BD',
+ lharu: '\u21BC',
+ lharul: '\u296A',
+ lhblk: '\u2584',
+ LJcy: '\u0409',
+ ljcy: '\u0459',
+ Ll: '\u22D8',
+ ll: '\u226A',
+ llarr: '\u21C7',
+ llcorner: '\u231E',
+ Lleftarrow: '\u21DA',
+ llhard: '\u296B',
+ lltri: '\u25FA',
+ Lmidot: '\u013F',
+ lmidot: '\u0140',
+ lmoust: '\u23B0',
+ lmoustache: '\u23B0',
+ lnap: '\u2A89',
+ lnapprox: '\u2A89',
+ lnE: '\u2268',
+ lne: '\u2A87',
+ lneq: '\u2A87',
+ lneqq: '\u2268',
+ lnsim: '\u22E6',
+ loang: '\u27EC',
+ loarr: '\u21FD',
+ lobrk: '\u27E6',
+ LongLeftArrow: '\u27F5',
+ Longleftarrow: '\u27F8',
+ longleftarrow: '\u27F5',
+ LongLeftRightArrow: '\u27F7',
+ Longleftrightarrow: '\u27FA',
+ longleftrightarrow: '\u27F7',
+ longmapsto: '\u27FC',
+ LongRightArrow: '\u27F6',
+ Longrightarrow: '\u27F9',
+ longrightarrow: '\u27F6',
+ looparrowleft: '\u21AB',
+ looparrowright: '\u21AC',
+ lopar: '\u2985',
+ Lopf: '\uD835\uDD43',
+ lopf: '\uD835\uDD5D',
+ loplus: '\u2A2D',
+ lotimes: '\u2A34',
+ lowast: '\u2217',
+ lowbar: '\u005F',
+ LowerLeftArrow: '\u2199',
+ LowerRightArrow: '\u2198',
+ loz: '\u25CA',
+ lozenge: '\u25CA',
+ lozf: '\u29EB',
+ lpar: '\u0028',
+ lparlt: '\u2993',
+ lrarr: '\u21C6',
+ lrcorner: '\u231F',
+ lrhar: '\u21CB',
+ lrhard: '\u296D',
+ lrm: '\u200E',
+ lrtri: '\u22BF',
+ lsaquo: '\u2039',
+ Lscr: '\u2112',
+ lscr: '\uD835\uDCC1',
+ Lsh: '\u21B0',
+ lsh: '\u21B0',
+ lsim: '\u2272',
+ lsime: '\u2A8D',
+ lsimg: '\u2A8F',
+ lsqb: '\u005B',
+ lsquo: '\u2018',
+ lsquor: '\u201A',
+ Lstrok: '\u0141',
+ lstrok: '\u0142',
+ Lt: '\u226A',
+ LT: '\u003C',
+ lt: '\u003C',
+ ltcc: '\u2AA6',
+ ltcir: '\u2A79',
+ ltdot: '\u22D6',
+ lthree: '\u22CB',
+ ltimes: '\u22C9',
+ ltlarr: '\u2976',
+ ltquest: '\u2A7B',
+ ltri: '\u25C3',
+ ltrie: '\u22B4',
+ ltrif: '\u25C2',
+ ltrPar: '\u2996',
+ lurdshar: '\u294A',
+ luruhar: '\u2966',
+ lvertneqq: '\u2268\uFE00',
+ lvnE: '\u2268\uFE00',
+ macr: '\u00AF',
+ male: '\u2642',
+ malt: '\u2720',
+ maltese: '\u2720',
+ Map: '\u2905',
+ map: '\u21A6',
+ mapsto: '\u21A6',
+ mapstodown: '\u21A7',
+ mapstoleft: '\u21A4',
+ mapstoup: '\u21A5',
+ marker: '\u25AE',
+ mcomma: '\u2A29',
+ Mcy: '\u041C',
+ mcy: '\u043C',
+ mdash: '\u2014',
+ mDDot: '\u223A',
+ measuredangle: '\u2221',
+ MediumSpace: '\u205F',
+ Mellintrf: '\u2133',
+ Mfr: '\uD835\uDD10',
+ mfr: '\uD835\uDD2A',
+ mho: '\u2127',
+ micro: '\u00B5',
+ mid: '\u2223',
+ midast: '\u002A',
+ midcir: '\u2AF0',
+ middot: '\u00B7',
+ minus: '\u2212',
+ minusb: '\u229F',
+ minusd: '\u2238',
+ minusdu: '\u2A2A',
+ MinusPlus: '\u2213',
+ mlcp: '\u2ADB',
+ mldr: '\u2026',
+ mnplus: '\u2213',
+ models: '\u22A7',
+ Mopf: '\uD835\uDD44',
+ mopf: '\uD835\uDD5E',
+ mp: '\u2213',
+ Mscr: '\u2133',
+ mscr: '\uD835\uDCC2',
+ mstpos: '\u223E',
+ Mu: '\u039C',
+ mu: '\u03BC',
+ multimap: '\u22B8',
+ mumap: '\u22B8',
+ nabla: '\u2207',
+ Nacute: '\u0143',
+ nacute: '\u0144',
+ nang: '\u2220\u20D2',
+ nap: '\u2249',
+ napE: '\u2A70\u0338',
+ napid: '\u224B\u0338',
+ napos: '\u0149',
+ napprox: '\u2249',
+ natur: '\u266E',
+ natural: '\u266E',
+ naturals: '\u2115',
+ nbsp: '\u00A0',
+ nbump: '\u224E\u0338',
+ nbumpe: '\u224F\u0338',
+ ncap: '\u2A43',
+ Ncaron: '\u0147',
+ ncaron: '\u0148',
+ Ncedil: '\u0145',
+ ncedil: '\u0146',
+ ncong: '\u2247',
+ ncongdot: '\u2A6D\u0338',
+ ncup: '\u2A42',
+ Ncy: '\u041D',
+ ncy: '\u043D',
+ ndash: '\u2013',
+ ne: '\u2260',
+ nearhk: '\u2924',
+ neArr: '\u21D7',
+ nearr: '\u2197',
+ nearrow: '\u2197',
+ nedot: '\u2250\u0338',
+ NegativeMediumSpace: '\u200B',
+ NegativeThickSpace: '\u200B',
+ NegativeThinSpace: '\u200B',
+ NegativeVeryThinSpace: '\u200B',
+ nequiv: '\u2262',
+ nesear: '\u2928',
+ nesim: '\u2242\u0338',
+ NestedGreaterGreater: '\u226B',
+ NestedLessLess: '\u226A',
+ NewLine: '\u000A',
+ nexist: '\u2204',
+ nexists: '\u2204',
+ Nfr: '\uD835\uDD11',
+ nfr: '\uD835\uDD2B',
+ ngE: '\u2267\u0338',
+ nge: '\u2271',
+ ngeq: '\u2271',
+ ngeqq: '\u2267\u0338',
+ ngeqslant: '\u2A7E\u0338',
+ nges: '\u2A7E\u0338',
+ nGg: '\u22D9\u0338',
+ ngsim: '\u2275',
+ nGt: '\u226B\u20D2',
+ ngt: '\u226F',
+ ngtr: '\u226F',
+ nGtv: '\u226B\u0338',
+ nhArr: '\u21CE',
+ nharr: '\u21AE',
+ nhpar: '\u2AF2',
+ ni: '\u220B',
+ nis: '\u22FC',
+ nisd: '\u22FA',
+ niv: '\u220B',
+ NJcy: '\u040A',
+ njcy: '\u045A',
+ nlArr: '\u21CD',
+ nlarr: '\u219A',
+ nldr: '\u2025',
+ nlE: '\u2266\u0338',
+ nle: '\u2270',
+ nLeftarrow: '\u21CD',
+ nleftarrow: '\u219A',
+ nLeftrightarrow: '\u21CE',
+ nleftrightarrow: '\u21AE',
+ nleq: '\u2270',
+ nleqq: '\u2266\u0338',
+ nleqslant: '\u2A7D\u0338',
+ nles: '\u2A7D\u0338',
+ nless: '\u226E',
+ nLl: '\u22D8\u0338',
+ nlsim: '\u2274',
+ nLt: '\u226A\u20D2',
+ nlt: '\u226E',
+ nltri: '\u22EA',
+ nltrie: '\u22EC',
+ nLtv: '\u226A\u0338',
+ nmid: '\u2224',
+ NoBreak: '\u2060',
+ NonBreakingSpace: '\u00A0',
+ Nopf: '\u2115',
+ nopf: '\uD835\uDD5F',
+ Not: '\u2AEC',
+ not: '\u00AC',
+ NotCongruent: '\u2262',
+ NotCupCap: '\u226D',
+ NotDoubleVerticalBar: '\u2226',
+ NotElement: '\u2209',
+ NotEqual: '\u2260',
+ NotEqualTilde: '\u2242\u0338',
+ NotExists: '\u2204',
+ NotGreater: '\u226F',
+ NotGreaterEqual: '\u2271',
+ NotGreaterFullEqual: '\u2267\u0338',
+ NotGreaterGreater: '\u226B\u0338',
+ NotGreaterLess: '\u2279',
+ NotGreaterSlantEqual: '\u2A7E\u0338',
+ NotGreaterTilde: '\u2275',
+ NotHumpDownHump: '\u224E\u0338',
+ NotHumpEqual: '\u224F\u0338',
+ notin: '\u2209',
+ notindot: '\u22F5\u0338',
+ notinE: '\u22F9\u0338',
+ notinva: '\u2209',
+ notinvb: '\u22F7',
+ notinvc: '\u22F6',
+ NotLeftTriangle: '\u22EA',
+ NotLeftTriangleBar: '\u29CF\u0338',
+ NotLeftTriangleEqual: '\u22EC',
+ NotLess: '\u226E',
+ NotLessEqual: '\u2270',
+ NotLessGreater: '\u2278',
+ NotLessLess: '\u226A\u0338',
+ NotLessSlantEqual: '\u2A7D\u0338',
+ NotLessTilde: '\u2274',
+ NotNestedGreaterGreater: '\u2AA2\u0338',
+ NotNestedLessLess: '\u2AA1\u0338',
+ notni: '\u220C',
+ notniva: '\u220C',
+ notnivb: '\u22FE',
+ notnivc: '\u22FD',
+ NotPrecedes: '\u2280',
+ NotPrecedesEqual: '\u2AAF\u0338',
+ NotPrecedesSlantEqual: '\u22E0',
+ NotReverseElement: '\u220C',
+ NotRightTriangle: '\u22EB',
+ NotRightTriangleBar: '\u29D0\u0338',
+ NotRightTriangleEqual: '\u22ED',
+ NotSquareSubset: '\u228F\u0338',
+ NotSquareSubsetEqual: '\u22E2',
+ NotSquareSuperset: '\u2290\u0338',
+ NotSquareSupersetEqual: '\u22E3',
+ NotSubset: '\u2282\u20D2',
+ NotSubsetEqual: '\u2288',
+ NotSucceeds: '\u2281',
+ NotSucceedsEqual: '\u2AB0\u0338',
+ NotSucceedsSlantEqual: '\u22E1',
+ NotSucceedsTilde: '\u227F\u0338',
+ NotSuperset: '\u2283\u20D2',
+ NotSupersetEqual: '\u2289',
+ NotTilde: '\u2241',
+ NotTildeEqual: '\u2244',
+ NotTildeFullEqual: '\u2247',
+ NotTildeTilde: '\u2249',
+ NotVerticalBar: '\u2224',
+ npar: '\u2226',
+ nparallel: '\u2226',
+ nparsl: '\u2AFD\u20E5',
+ npart: '\u2202\u0338',
+ npolint: '\u2A14',
+ npr: '\u2280',
+ nprcue: '\u22E0',
+ npre: '\u2AAF\u0338',
+ nprec: '\u2280',
+ npreceq: '\u2AAF\u0338',
+ nrArr: '\u21CF',
+ nrarr: '\u219B',
+ nrarrc: '\u2933\u0338',
+ nrarrw: '\u219D\u0338',
+ nRightarrow: '\u21CF',
+ nrightarrow: '\u219B',
+ nrtri: '\u22EB',
+ nrtrie: '\u22ED',
+ nsc: '\u2281',
+ nsccue: '\u22E1',
+ nsce: '\u2AB0\u0338',
+ Nscr: '\uD835\uDCA9',
+ nscr: '\uD835\uDCC3',
+ nshortmid: '\u2224',
+ nshortparallel: '\u2226',
+ nsim: '\u2241',
+ nsime: '\u2244',
+ nsimeq: '\u2244',
+ nsmid: '\u2224',
+ nspar: '\u2226',
+ nsqsube: '\u22E2',
+ nsqsupe: '\u22E3',
+ nsub: '\u2284',
+ nsubE: '\u2AC5\u0338',
+ nsube: '\u2288',
+ nsubset: '\u2282\u20D2',
+ nsubseteq: '\u2288',
+ nsubseteqq: '\u2AC5\u0338',
+ nsucc: '\u2281',
+ nsucceq: '\u2AB0\u0338',
+ nsup: '\u2285',
+ nsupE: '\u2AC6\u0338',
+ nsupe: '\u2289',
+ nsupset: '\u2283\u20D2',
+ nsupseteq: '\u2289',
+ nsupseteqq: '\u2AC6\u0338',
+ ntgl: '\u2279',
+ Ntilde: '\u00D1',
+ ntilde: '\u00F1',
+ ntlg: '\u2278',
+ ntriangleleft: '\u22EA',
+ ntrianglelefteq: '\u22EC',
+ ntriangleright: '\u22EB',
+ ntrianglerighteq: '\u22ED',
+ Nu: '\u039D',
+ nu: '\u03BD',
+ num: '\u0023',
+ numero: '\u2116',
+ numsp: '\u2007',
+ nvap: '\u224D\u20D2',
+ nVDash: '\u22AF',
+ nVdash: '\u22AE',
+ nvDash: '\u22AD',
+ nvdash: '\u22AC',
+ nvge: '\u2265\u20D2',
+ nvgt: '\u003E\u20D2',
+ nvHarr: '\u2904',
+ nvinfin: '\u29DE',
+ nvlArr: '\u2902',
+ nvle: '\u2264\u20D2',
+ nvlt: '\u003C\u20D2',
+ nvltrie: '\u22B4\u20D2',
+ nvrArr: '\u2903',
+ nvrtrie: '\u22B5\u20D2',
+ nvsim: '\u223C\u20D2',
+ nwarhk: '\u2923',
+ nwArr: '\u21D6',
+ nwarr: '\u2196',
+ nwarrow: '\u2196',
+ nwnear: '\u2927',
+ Oacute: '\u00D3',
+ oacute: '\u00F3',
+ oast: '\u229B',
+ ocir: '\u229A',
+ Ocirc: '\u00D4',
+ ocirc: '\u00F4',
+ Ocy: '\u041E',
+ ocy: '\u043E',
+ odash: '\u229D',
+ Odblac: '\u0150',
+ odblac: '\u0151',
+ odiv: '\u2A38',
+ odot: '\u2299',
+ odsold: '\u29BC',
+ OElig: '\u0152',
+ oelig: '\u0153',
+ ofcir: '\u29BF',
+ Ofr: '\uD835\uDD12',
+ ofr: '\uD835\uDD2C',
+ ogon: '\u02DB',
+ Ograve: '\u00D2',
+ ograve: '\u00F2',
+ ogt: '\u29C1',
+ ohbar: '\u29B5',
+ ohm: '\u03A9',
+ oint: '\u222E',
+ olarr: '\u21BA',
+ olcir: '\u29BE',
+ olcross: '\u29BB',
+ oline: '\u203E',
+ olt: '\u29C0',
+ Omacr: '\u014C',
+ omacr: '\u014D',
+ Omega: '\u03A9',
+ omega: '\u03C9',
+ Omicron: '\u039F',
+ omicron: '\u03BF',
+ omid: '\u29B6',
+ ominus: '\u2296',
+ Oopf: '\uD835\uDD46',
+ oopf: '\uD835\uDD60',
+ opar: '\u29B7',
+ OpenCurlyDoubleQuote: '\u201C',
+ OpenCurlyQuote: '\u2018',
+ operp: '\u29B9',
+ oplus: '\u2295',
+ Or: '\u2A54',
+ or: '\u2228',
+ orarr: '\u21BB',
+ ord: '\u2A5D',
+ order: '\u2134',
+ orderof: '\u2134',
+ ordf: '\u00AA',
+ ordm: '\u00BA',
+ origof: '\u22B6',
+ oror: '\u2A56',
+ orslope: '\u2A57',
+ orv: '\u2A5B',
+ oS: '\u24C8',
+ Oscr: '\uD835\uDCAA',
+ oscr: '\u2134',
+ Oslash: '\u00D8',
+ oslash: '\u00F8',
+ osol: '\u2298',
+ Otilde: '\u00D5',
+ otilde: '\u00F5',
+ Otimes: '\u2A37',
+ otimes: '\u2297',
+ otimesas: '\u2A36',
+ Ouml: '\u00D6',
+ ouml: '\u00F6',
+ ovbar: '\u233D',
+ OverBar: '\u203E',
+ OverBrace: '\u23DE',
+ OverBracket: '\u23B4',
+ OverParenthesis: '\u23DC',
+ par: '\u2225',
+ para: '\u00B6',
+ parallel: '\u2225',
+ parsim: '\u2AF3',
+ parsl: '\u2AFD',
+ part: '\u2202',
+ PartialD: '\u2202',
+ Pcy: '\u041F',
+ pcy: '\u043F',
+ percnt: '\u0025',
+ period: '\u002E',
+ permil: '\u2030',
+ perp: '\u22A5',
+ pertenk: '\u2031',
+ Pfr: '\uD835\uDD13',
+ pfr: '\uD835\uDD2D',
+ Phi: '\u03A6',
+ phi: '\u03C6',
+ phiv: '\u03D5',
+ phmmat: '\u2133',
+ phone: '\u260E',
+ Pi: '\u03A0',
+ pi: '\u03C0',
+ pitchfork: '\u22D4',
+ piv: '\u03D6',
+ planck: '\u210F',
+ planckh: '\u210E',
+ plankv: '\u210F',
+ plus: '\u002B',
+ plusacir: '\u2A23',
+ plusb: '\u229E',
+ pluscir: '\u2A22',
+ plusdo: '\u2214',
+ plusdu: '\u2A25',
+ pluse: '\u2A72',
+ PlusMinus: '\u00B1',
+ plusmn: '\u00B1',
+ plussim: '\u2A26',
+ plustwo: '\u2A27',
+ pm: '\u00B1',
+ Poincareplane: '\u210C',
+ pointint: '\u2A15',
+ Popf: '\u2119',
+ popf: '\uD835\uDD61',
+ pound: '\u00A3',
+ Pr: '\u2ABB',
+ pr: '\u227A',
+ prap: '\u2AB7',
+ prcue: '\u227C',
+ prE: '\u2AB3',
+ pre: '\u2AAF',
+ prec: '\u227A',
+ precapprox: '\u2AB7',
+ preccurlyeq: '\u227C',
+ Precedes: '\u227A',
+ PrecedesEqual: '\u2AAF',
+ PrecedesSlantEqual: '\u227C',
+ PrecedesTilde: '\u227E',
+ preceq: '\u2AAF',
+ precnapprox: '\u2AB9',
+ precneqq: '\u2AB5',
+ precnsim: '\u22E8',
+ precsim: '\u227E',
+ Prime: '\u2033',
+ prime: '\u2032',
+ primes: '\u2119',
+ prnap: '\u2AB9',
+ prnE: '\u2AB5',
+ prnsim: '\u22E8',
+ prod: '\u220F',
+ Product: '\u220F',
+ profalar: '\u232E',
+ profline: '\u2312',
+ profsurf: '\u2313',
+ prop: '\u221D',
+ Proportion: '\u2237',
+ Proportional: '\u221D',
+ propto: '\u221D',
+ prsim: '\u227E',
+ prurel: '\u22B0',
+ Pscr: '\uD835\uDCAB',
+ pscr: '\uD835\uDCC5',
+ Psi: '\u03A8',
+ psi: '\u03C8',
+ puncsp: '\u2008',
+ Qfr: '\uD835\uDD14',
+ qfr: '\uD835\uDD2E',
+ qint: '\u2A0C',
+ Qopf: '\u211A',
+ qopf: '\uD835\uDD62',
+ qprime: '\u2057',
+ Qscr: '\uD835\uDCAC',
+ qscr: '\uD835\uDCC6',
+ quaternions: '\u210D',
+ quatint: '\u2A16',
+ quest: '\u003F',
+ questeq: '\u225F',
+ QUOT: '\u0022',
+ quot: '\u0022',
+ rAarr: '\u21DB',
+ race: '\u223D\u0331',
+ Racute: '\u0154',
+ racute: '\u0155',
+ radic: '\u221A',
+ raemptyv: '\u29B3',
+ Rang: '\u27EB',
+ rang: '\u27E9',
+ rangd: '\u2992',
+ range: '\u29A5',
+ rangle: '\u27E9',
+ raquo: '\u00BB',
+ Rarr: '\u21A0',
+ rArr: '\u21D2',
+ rarr: '\u2192',
+ rarrap: '\u2975',
+ rarrb: '\u21E5',
+ rarrbfs: '\u2920',
+ rarrc: '\u2933',
+ rarrfs: '\u291E',
+ rarrhk: '\u21AA',
+ rarrlp: '\u21AC',
+ rarrpl: '\u2945',
+ rarrsim: '\u2974',
+ Rarrtl: '\u2916',
+ rarrtl: '\u21A3',
+ rarrw: '\u219D',
+ rAtail: '\u291C',
+ ratail: '\u291A',
+ ratio: '\u2236',
+ rationals: '\u211A',
+ RBarr: '\u2910',
+ rBarr: '\u290F',
+ rbarr: '\u290D',
+ rbbrk: '\u2773',
+ rbrace: '\u007D',
+ rbrack: '\u005D',
+ rbrke: '\u298C',
+ rbrksld: '\u298E',
+ rbrkslu: '\u2990',
+ Rcaron: '\u0158',
+ rcaron: '\u0159',
+ Rcedil: '\u0156',
+ rcedil: '\u0157',
+ rceil: '\u2309',
+ rcub: '\u007D',
+ Rcy: '\u0420',
+ rcy: '\u0440',
+ rdca: '\u2937',
+ rdldhar: '\u2969',
+ rdquo: '\u201D',
+ rdquor: '\u201D',
+ rdsh: '\u21B3',
+ Re: '\u211C',
+ real: '\u211C',
+ realine: '\u211B',
+ realpart: '\u211C',
+ reals: '\u211D',
+ rect: '\u25AD',
+ REG: '\u00AE',
+ reg: '\u00AE',
+ ReverseElement: '\u220B',
+ ReverseEquilibrium: '\u21CB',
+ ReverseUpEquilibrium: '\u296F',
+ rfisht: '\u297D',
+ rfloor: '\u230B',
+ Rfr: '\u211C',
+ rfr: '\uD835\uDD2F',
+ rHar: '\u2964',
+ rhard: '\u21C1',
+ rharu: '\u21C0',
+ rharul: '\u296C',
+ Rho: '\u03A1',
+ rho: '\u03C1',
+ rhov: '\u03F1',
+ RightAngleBracket: '\u27E9',
+ RightArrow: '\u2192',
+ Rightarrow: '\u21D2',
+ rightarrow: '\u2192',
+ RightArrowBar: '\u21E5',
+ RightArrowLeftArrow: '\u21C4',
+ rightarrowtail: '\u21A3',
+ RightCeiling: '\u2309',
+ RightDoubleBracket: '\u27E7',
+ RightDownTeeVector: '\u295D',
+ RightDownVector: '\u21C2',
+ RightDownVectorBar: '\u2955',
+ RightFloor: '\u230B',
+ rightharpoondown: '\u21C1',
+ rightharpoonup: '\u21C0',
+ rightleftarrows: '\u21C4',
+ rightleftharpoons: '\u21CC',
+ rightrightarrows: '\u21C9',
+ rightsquigarrow: '\u219D',
+ RightTee: '\u22A2',
+ RightTeeArrow: '\u21A6',
+ RightTeeVector: '\u295B',
+ rightthreetimes: '\u22CC',
+ RightTriangle: '\u22B3',
+ RightTriangleBar: '\u29D0',
+ RightTriangleEqual: '\u22B5',
+ RightUpDownVector: '\u294F',
+ RightUpTeeVector: '\u295C',
+ RightUpVector: '\u21BE',
+ RightUpVectorBar: '\u2954',
+ RightVector: '\u21C0',
+ RightVectorBar: '\u2953',
+ ring: '\u02DA',
+ risingdotseq: '\u2253',
+ rlarr: '\u21C4',
+ rlhar: '\u21CC',
+ rlm: '\u200F',
+ rmoust: '\u23B1',
+ rmoustache: '\u23B1',
+ rnmid: '\u2AEE',
+ roang: '\u27ED',
+ roarr: '\u21FE',
+ robrk: '\u27E7',
+ ropar: '\u2986',
+ Ropf: '\u211D',
+ ropf: '\uD835\uDD63',
+ roplus: '\u2A2E',
+ rotimes: '\u2A35',
+ RoundImplies: '\u2970',
+ rpar: '\u0029',
+ rpargt: '\u2994',
+ rppolint: '\u2A12',
+ rrarr: '\u21C9',
+ Rrightarrow: '\u21DB',
+ rsaquo: '\u203A',
+ Rscr: '\u211B',
+ rscr: '\uD835\uDCC7',
+ Rsh: '\u21B1',
+ rsh: '\u21B1',
+ rsqb: '\u005D',
+ rsquo: '\u2019',
+ rsquor: '\u2019',
+ rthree: '\u22CC',
+ rtimes: '\u22CA',
+ rtri: '\u25B9',
+ rtrie: '\u22B5',
+ rtrif: '\u25B8',
+ rtriltri: '\u29CE',
+ RuleDelayed: '\u29F4',
+ ruluhar: '\u2968',
+ rx: '\u211E',
+ Sacute: '\u015A',
+ sacute: '\u015B',
+ sbquo: '\u201A',
+ Sc: '\u2ABC',
+ sc: '\u227B',
+ scap: '\u2AB8',
+ Scaron: '\u0160',
+ scaron: '\u0161',
+ sccue: '\u227D',
+ scE: '\u2AB4',
+ sce: '\u2AB0',
+ Scedil: '\u015E',
+ scedil: '\u015F',
+ Scirc: '\u015C',
+ scirc: '\u015D',
+ scnap: '\u2ABA',
+ scnE: '\u2AB6',
+ scnsim: '\u22E9',
+ scpolint: '\u2A13',
+ scsim: '\u227F',
+ Scy: '\u0421',
+ scy: '\u0441',
+ sdot: '\u22C5',
+ sdotb: '\u22A1',
+ sdote: '\u2A66',
+ searhk: '\u2925',
+ seArr: '\u21D8',
+ searr: '\u2198',
+ searrow: '\u2198',
+ sect: '\u00A7',
+ semi: '\u003B',
+ seswar: '\u2929',
+ setminus: '\u2216',
+ setmn: '\u2216',
+ sext: '\u2736',
+ Sfr: '\uD835\uDD16',
+ sfr: '\uD835\uDD30',
+ sfrown: '\u2322',
+ sharp: '\u266F',
+ SHCHcy: '\u0429',
+ shchcy: '\u0449',
+ SHcy: '\u0428',
+ shcy: '\u0448',
+ ShortDownArrow: '\u2193',
+ ShortLeftArrow: '\u2190',
+ shortmid: '\u2223',
+ shortparallel: '\u2225',
+ ShortRightArrow: '\u2192',
+ ShortUpArrow: '\u2191',
+ shy: '\u00AD',
+ Sigma: '\u03A3',
+ sigma: '\u03C3',
+ sigmaf: '\u03C2',
+ sigmav: '\u03C2',
+ sim: '\u223C',
+ simdot: '\u2A6A',
+ sime: '\u2243',
+ simeq: '\u2243',
+ simg: '\u2A9E',
+ simgE: '\u2AA0',
+ siml: '\u2A9D',
+ simlE: '\u2A9F',
+ simne: '\u2246',
+ simplus: '\u2A24',
+ simrarr: '\u2972',
+ slarr: '\u2190',
+ SmallCircle: '\u2218',
+ smallsetminus: '\u2216',
+ smashp: '\u2A33',
+ smeparsl: '\u29E4',
+ smid: '\u2223',
+ smile: '\u2323',
+ smt: '\u2AAA',
+ smte: '\u2AAC',
+ smtes: '\u2AAC\uFE00',
+ SOFTcy: '\u042C',
+ softcy: '\u044C',
+ sol: '\u002F',
+ solb: '\u29C4',
+ solbar: '\u233F',
+ Sopf: '\uD835\uDD4A',
+ sopf: '\uD835\uDD64',
+ spades: '\u2660',
+ spadesuit: '\u2660',
+ spar: '\u2225',
+ sqcap: '\u2293',
+ sqcaps: '\u2293\uFE00',
+ sqcup: '\u2294',
+ sqcups: '\u2294\uFE00',
+ Sqrt: '\u221A',
+ sqsub: '\u228F',
+ sqsube: '\u2291',
+ sqsubset: '\u228F',
+ sqsubseteq: '\u2291',
+ sqsup: '\u2290',
+ sqsupe: '\u2292',
+ sqsupset: '\u2290',
+ sqsupseteq: '\u2292',
+ squ: '\u25A1',
+ Square: '\u25A1',
+ square: '\u25A1',
+ SquareIntersection: '\u2293',
+ SquareSubset: '\u228F',
+ SquareSubsetEqual: '\u2291',
+ SquareSuperset: '\u2290',
+ SquareSupersetEqual: '\u2292',
+ SquareUnion: '\u2294',
+ squarf: '\u25AA',
+ squf: '\u25AA',
+ srarr: '\u2192',
+ Sscr: '\uD835\uDCAE',
+ sscr: '\uD835\uDCC8',
+ ssetmn: '\u2216',
+ ssmile: '\u2323',
+ sstarf: '\u22C6',
+ Star: '\u22C6',
+ star: '\u2606',
+ starf: '\u2605',
+ straightepsilon: '\u03F5',
+ straightphi: '\u03D5',
+ strns: '\u00AF',
+ Sub: '\u22D0',
+ sub: '\u2282',
+ subdot: '\u2ABD',
+ subE: '\u2AC5',
+ sube: '\u2286',
+ subedot: '\u2AC3',
+ submult: '\u2AC1',
+ subnE: '\u2ACB',
+ subne: '\u228A',
+ subplus: '\u2ABF',
+ subrarr: '\u2979',
+ Subset: '\u22D0',
+ subset: '\u2282',
+ subseteq: '\u2286',
+ subseteqq: '\u2AC5',
+ SubsetEqual: '\u2286',
+ subsetneq: '\u228A',
+ subsetneqq: '\u2ACB',
+ subsim: '\u2AC7',
+ subsub: '\u2AD5',
+ subsup: '\u2AD3',
+ succ: '\u227B',
+ succapprox: '\u2AB8',
+ succcurlyeq: '\u227D',
+ Succeeds: '\u227B',
+ SucceedsEqual: '\u2AB0',
+ SucceedsSlantEqual: '\u227D',
+ SucceedsTilde: '\u227F',
+ succeq: '\u2AB0',
+ succnapprox: '\u2ABA',
+ succneqq: '\u2AB6',
+ succnsim: '\u22E9',
+ succsim: '\u227F',
+ SuchThat: '\u220B',
+ Sum: '\u2211',
+ sum: '\u2211',
+ sung: '\u266A',
+ Sup: '\u22D1',
+ sup: '\u2283',
+ sup1: '\u00B9',
+ sup2: '\u00B2',
+ sup3: '\u00B3',
+ supdot: '\u2ABE',
+ supdsub: '\u2AD8',
+ supE: '\u2AC6',
+ supe: '\u2287',
+ supedot: '\u2AC4',
+ Superset: '\u2283',
+ SupersetEqual: '\u2287',
+ suphsol: '\u27C9',
+ suphsub: '\u2AD7',
+ suplarr: '\u297B',
+ supmult: '\u2AC2',
+ supnE: '\u2ACC',
+ supne: '\u228B',
+ supplus: '\u2AC0',
+ Supset: '\u22D1',
+ supset: '\u2283',
+ supseteq: '\u2287',
+ supseteqq: '\u2AC6',
+ supsetneq: '\u228B',
+ supsetneqq: '\u2ACC',
+ supsim: '\u2AC8',
+ supsub: '\u2AD4',
+ supsup: '\u2AD6',
+ swarhk: '\u2926',
+ swArr: '\u21D9',
+ swarr: '\u2199',
+ swarrow: '\u2199',
+ swnwar: '\u292A',
+ szlig: '\u00DF',
+ Tab: '\u0009',
+ target: '\u2316',
+ Tau: '\u03A4',
+ tau: '\u03C4',
+ tbrk: '\u23B4',
+ Tcaron: '\u0164',
+ tcaron: '\u0165',
+ Tcedil: '\u0162',
+ tcedil: '\u0163',
+ Tcy: '\u0422',
+ tcy: '\u0442',
+ tdot: '\u20DB',
+ telrec: '\u2315',
+ Tfr: '\uD835\uDD17',
+ tfr: '\uD835\uDD31',
+ there4: '\u2234',
+ Therefore: '\u2234',
+ therefore: '\u2234',
+ Theta: '\u0398',
+ theta: '\u03B8',
+ thetasym: '\u03D1',
+ thetav: '\u03D1',
+ thickapprox: '\u2248',
+ thicksim: '\u223C',
+ ThickSpace: '\u205F\u200A',
+ thinsp: '\u2009',
+ ThinSpace: '\u2009',
+ thkap: '\u2248',
+ thksim: '\u223C',
+ THORN: '\u00DE',
+ thorn: '\u00FE',
+ Tilde: '\u223C',
+ tilde: '\u02DC',
+ TildeEqual: '\u2243',
+ TildeFullEqual: '\u2245',
+ TildeTilde: '\u2248',
+ times: '\u00D7',
+ timesb: '\u22A0',
+ timesbar: '\u2A31',
+ timesd: '\u2A30',
+ tint: '\u222D',
+ toea: '\u2928',
+ top: '\u22A4',
+ topbot: '\u2336',
+ topcir: '\u2AF1',
+ Topf: '\uD835\uDD4B',
+ topf: '\uD835\uDD65',
+ topfork: '\u2ADA',
+ tosa: '\u2929',
+ tprime: '\u2034',
+ TRADE: '\u2122',
+ trade: '\u2122',
+ triangle: '\u25B5',
+ triangledown: '\u25BF',
+ triangleleft: '\u25C3',
+ trianglelefteq: '\u22B4',
+ triangleq: '\u225C',
+ triangleright: '\u25B9',
+ trianglerighteq: '\u22B5',
+ tridot: '\u25EC',
+ trie: '\u225C',
+ triminus: '\u2A3A',
+ TripleDot: '\u20DB',
+ triplus: '\u2A39',
+ trisb: '\u29CD',
+ tritime: '\u2A3B',
+ trpezium: '\u23E2',
+ Tscr: '\uD835\uDCAF',
+ tscr: '\uD835\uDCC9',
+ TScy: '\u0426',
+ tscy: '\u0446',
+ TSHcy: '\u040B',
+ tshcy: '\u045B',
+ Tstrok: '\u0166',
+ tstrok: '\u0167',
+ twixt: '\u226C',
+ twoheadleftarrow: '\u219E',
+ twoheadrightarrow: '\u21A0',
+ Uacute: '\u00DA',
+ uacute: '\u00FA',
+ Uarr: '\u219F',
+ uArr: '\u21D1',
+ uarr: '\u2191',
+ Uarrocir: '\u2949',
+ Ubrcy: '\u040E',
+ ubrcy: '\u045E',
+ Ubreve: '\u016C',
+ ubreve: '\u016D',
+ Ucirc: '\u00DB',
+ ucirc: '\u00FB',
+ Ucy: '\u0423',
+ ucy: '\u0443',
+ udarr: '\u21C5',
+ Udblac: '\u0170',
+ udblac: '\u0171',
+ udhar: '\u296E',
+ ufisht: '\u297E',
+ Ufr: '\uD835\uDD18',
+ ufr: '\uD835\uDD32',
+ Ugrave: '\u00D9',
+ ugrave: '\u00F9',
+ uHar: '\u2963',
+ uharl: '\u21BF',
+ uharr: '\u21BE',
+ uhblk: '\u2580',
+ ulcorn: '\u231C',
+ ulcorner: '\u231C',
+ ulcrop: '\u230F',
+ ultri: '\u25F8',
+ Umacr: '\u016A',
+ umacr: '\u016B',
+ uml: '\u00A8',
+ UnderBar: '\u005F',
+ UnderBrace: '\u23DF',
+ UnderBracket: '\u23B5',
+ UnderParenthesis: '\u23DD',
+ Union: '\u22C3',
+ UnionPlus: '\u228E',
+ Uogon: '\u0172',
+ uogon: '\u0173',
+ Uopf: '\uD835\uDD4C',
+ uopf: '\uD835\uDD66',
+ UpArrow: '\u2191',
+ Uparrow: '\u21D1',
+ uparrow: '\u2191',
+ UpArrowBar: '\u2912',
+ UpArrowDownArrow: '\u21C5',
+ UpDownArrow: '\u2195',
+ Updownarrow: '\u21D5',
+ updownarrow: '\u2195',
+ UpEquilibrium: '\u296E',
+ upharpoonleft: '\u21BF',
+ upharpoonright: '\u21BE',
+ uplus: '\u228E',
+ UpperLeftArrow: '\u2196',
+ UpperRightArrow: '\u2197',
+ Upsi: '\u03D2',
+ upsi: '\u03C5',
+ upsih: '\u03D2',
+ Upsilon: '\u03A5',
+ upsilon: '\u03C5',
+ UpTee: '\u22A5',
+ UpTeeArrow: '\u21A5',
+ upuparrows: '\u21C8',
+ urcorn: '\u231D',
+ urcorner: '\u231D',
+ urcrop: '\u230E',
+ Uring: '\u016E',
+ uring: '\u016F',
+ urtri: '\u25F9',
+ Uscr: '\uD835\uDCB0',
+ uscr: '\uD835\uDCCA',
+ utdot: '\u22F0',
+ Utilde: '\u0168',
+ utilde: '\u0169',
+ utri: '\u25B5',
+ utrif: '\u25B4',
+ uuarr: '\u21C8',
+ Uuml: '\u00DC',
+ uuml: '\u00FC',
+ uwangle: '\u29A7',
+ vangrt: '\u299C',
+ varepsilon: '\u03F5',
+ varkappa: '\u03F0',
+ varnothing: '\u2205',
+ varphi: '\u03D5',
+ varpi: '\u03D6',
+ varpropto: '\u221D',
+ vArr: '\u21D5',
+ varr: '\u2195',
+ varrho: '\u03F1',
+ varsigma: '\u03C2',
+ varsubsetneq: '\u228A\uFE00',
+ varsubsetneqq: '\u2ACB\uFE00',
+ varsupsetneq: '\u228B\uFE00',
+ varsupsetneqq: '\u2ACC\uFE00',
+ vartheta: '\u03D1',
+ vartriangleleft: '\u22B2',
+ vartriangleright: '\u22B3',
+ Vbar: '\u2AEB',
+ vBar: '\u2AE8',
+ vBarv: '\u2AE9',
+ Vcy: '\u0412',
+ vcy: '\u0432',
+ VDash: '\u22AB',
+ Vdash: '\u22A9',
+ vDash: '\u22A8',
+ vdash: '\u22A2',
+ Vdashl: '\u2AE6',
+ Vee: '\u22C1',
+ vee: '\u2228',
+ veebar: '\u22BB',
+ veeeq: '\u225A',
+ vellip: '\u22EE',
+ Verbar: '\u2016',
+ verbar: '\u007C',
+ Vert: '\u2016',
+ vert: '\u007C',
+ VerticalBar: '\u2223',
+ VerticalLine: '\u007C',
+ VerticalSeparator: '\u2758',
+ VerticalTilde: '\u2240',
+ VeryThinSpace: '\u200A',
+ Vfr: '\uD835\uDD19',
+ vfr: '\uD835\uDD33',
+ vltri: '\u22B2',
+ vnsub: '\u2282\u20D2',
+ vnsup: '\u2283\u20D2',
+ Vopf: '\uD835\uDD4D',
+ vopf: '\uD835\uDD67',
+ vprop: '\u221D',
+ vrtri: '\u22B3',
+ Vscr: '\uD835\uDCB1',
+ vscr: '\uD835\uDCCB',
+ vsubnE: '\u2ACB\uFE00',
+ vsubne: '\u228A\uFE00',
+ vsupnE: '\u2ACC\uFE00',
+ vsupne: '\u228B\uFE00',
+ Vvdash: '\u22AA',
+ vzigzag: '\u299A',
+ Wcirc: '\u0174',
+ wcirc: '\u0175',
+ wedbar: '\u2A5F',
+ Wedge: '\u22C0',
+ wedge: '\u2227',
+ wedgeq: '\u2259',
+ weierp: '\u2118',
+ Wfr: '\uD835\uDD1A',
+ wfr: '\uD835\uDD34',
+ Wopf: '\uD835\uDD4E',
+ wopf: '\uD835\uDD68',
+ wp: '\u2118',
+ wr: '\u2240',
+ wreath: '\u2240',
+ Wscr: '\uD835\uDCB2',
+ wscr: '\uD835\uDCCC',
+ xcap: '\u22C2',
+ xcirc: '\u25EF',
+ xcup: '\u22C3',
+ xdtri: '\u25BD',
+ Xfr: '\uD835\uDD1B',
+ xfr: '\uD835\uDD35',
+ xhArr: '\u27FA',
+ xharr: '\u27F7',
+ Xi: '\u039E',
+ xi: '\u03BE',
+ xlArr: '\u27F8',
+ xlarr: '\u27F5',
+ xmap: '\u27FC',
+ xnis: '\u22FB',
+ xodot: '\u2A00',
+ Xopf: '\uD835\uDD4F',
+ xopf: '\uD835\uDD69',
+ xoplus: '\u2A01',
+ xotime: '\u2A02',
+ xrArr: '\u27F9',
+ xrarr: '\u27F6',
+ Xscr: '\uD835\uDCB3',
+ xscr: '\uD835\uDCCD',
+ xsqcup: '\u2A06',
+ xuplus: '\u2A04',
+ xutri: '\u25B3',
+ xvee: '\u22C1',
+ xwedge: '\u22C0',
+ Yacute: '\u00DD',
+ yacute: '\u00FD',
+ YAcy: '\u042F',
+ yacy: '\u044F',
+ Ycirc: '\u0176',
+ ycirc: '\u0177',
+ Ycy: '\u042B',
+ ycy: '\u044B',
+ yen: '\u00A5',
+ Yfr: '\uD835\uDD1C',
+ yfr: '\uD835\uDD36',
+ YIcy: '\u0407',
+ yicy: '\u0457',
+ Yopf: '\uD835\uDD50',
+ yopf: '\uD835\uDD6A',
+ Yscr: '\uD835\uDCB4',
+ yscr: '\uD835\uDCCE',
+ YUcy: '\u042E',
+ yucy: '\u044E',
+ Yuml: '\u0178',
+ yuml: '\u00FF',
+ Zacute: '\u0179',
+ zacute: '\u017A',
+ Zcaron: '\u017D',
+ zcaron: '\u017E',
+ Zcy: '\u0417',
+ zcy: '\u0437',
+ Zdot: '\u017B',
+ zdot: '\u017C',
+ zeetrf: '\u2128',
+ ZeroWidthSpace: '\u200B',
+ Zeta: '\u0396',
+ zeta: '\u03B6',
+ Zfr: '\u2128',
+ zfr: '\uD835\uDD37',
+ ZHcy: '\u0416',
+ zhcy: '\u0436',
+ zigrarr: '\u21DD',
+ Zopf: '\u2124',
+ zopf: '\uD835\uDD6B',
+ Zscr: '\uD835\uDCB5',
+ zscr: '\uD835\uDCCF',
+ zwj: '\u200D',
+ zwnj: '\u200C'
+ });
+
+ /**
+ * @deprecated use `HTML_ENTITIES` instead
+ * @see HTML_ENTITIES
+ */
+ exports.entityMap = exports.HTML_ENTITIES;
+ });
+ entities.XML_ENTITIES;
+ entities.HTML_ENTITIES;
+ entities.entityMap;
+
+ var NAMESPACE$1 = conventions.NAMESPACE;
+
+ //[4] NameStartChar ::= ":" | [A-Z] | "_" | [a-z] | [#xC0-#xD6] | [#xD8-#xF6] | [#xF8-#x2FF] | [#x370-#x37D] | [#x37F-#x1FFF] | [#x200C-#x200D] | [#x2070-#x218F] | [#x2C00-#x2FEF] | [#x3001-#xD7FF] | [#xF900-#xFDCF] | [#xFDF0-#xFFFD] | [#x10000-#xEFFFF]
+ //[4a] NameChar ::= NameStartChar | "-" | "." | [0-9] | #xB7 | [#x0300-#x036F] | [#x203F-#x2040]
+ //[5] Name ::= NameStartChar (NameChar)*
+ var nameStartChar = /[A-Z_a-z\xC0-\xD6\xD8-\xF6\u00F8-\u02FF\u0370-\u037D\u037F-\u1FFF\u200C-\u200D\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD]/; //\u10000-\uEFFFF
+ var nameChar = new RegExp("[\\-\\.0-9" + nameStartChar.source.slice(1, -1) + "\\u00B7\\u0300-\\u036F\\u203F-\\u2040]");
+ var tagNamePattern = new RegExp('^' + nameStartChar.source + nameChar.source + '*(?:\:' + nameStartChar.source + nameChar.source + '*)?$');
+ //var tagNamePattern = /^[a-zA-Z_][\w\-\.]*(?:\:[a-zA-Z_][\w\-\.]*)?$/
+ //var handlers = 'resolveEntity,getExternalSubset,characters,endDocument,endElement,endPrefixMapping,ignorableWhitespace,processingInstruction,setDocumentLocator,skippedEntity,startDocument,startElement,startPrefixMapping,notationDecl,unparsedEntityDecl,error,fatalError,warning,attributeDecl,elementDecl,externalEntityDecl,internalEntityDecl,comment,endCDATA,endDTD,endEntity,startCDATA,startDTD,startEntity'.split(',')
+
+ //S_TAG, S_ATTR, S_EQ, S_ATTR_NOQUOT_VALUE
+ //S_ATTR_SPACE, S_ATTR_END, S_TAG_SPACE, S_TAG_CLOSE
+ var S_TAG = 0; //tag name offerring
+ var S_ATTR = 1; //attr name offerring
+ var S_ATTR_SPACE = 2; //attr name end and space offer
+ var S_EQ = 3; //=space?
+ var S_ATTR_NOQUOT_VALUE = 4; //attr value(no quot value only)
+ var S_ATTR_END = 5; //attr value end and no space(quot end)
+ var S_TAG_SPACE = 6; //(attr value end || tag end ) && (space offer)
+ var S_TAG_CLOSE = 7; //closed el<el />
+
+ /**
+ * Creates an error that will not be caught by XMLReader aka the SAX parser.
+ *
+ * @param {string} message
+ * @param {any?} locator Optional, can provide details about the location in the source
+ * @constructor
+ */
+ function ParseError$1(message, locator) {
+ this.message = message;
+ this.locator = locator;
+ if (Error.captureStackTrace) Error.captureStackTrace(this, ParseError$1);
+ }
+ ParseError$1.prototype = new Error();
+ ParseError$1.prototype.name = ParseError$1.name;
+ function XMLReader$1() {}
+ XMLReader$1.prototype = {
+ parse: function (source, defaultNSMap, entityMap) {
+ var domBuilder = this.domBuilder;
+ domBuilder.startDocument();
+ _copy(defaultNSMap, defaultNSMap = {});
+ parse$1(source, defaultNSMap, entityMap, domBuilder, this.errorHandler);
+ domBuilder.endDocument();
+ }
+ };
+ function parse$1(source, defaultNSMapCopy, entityMap, domBuilder, errorHandler) {
+ function fixedFromCharCode(code) {
+ // String.prototype.fromCharCode does not supports
+ // > 2 bytes unicode chars directly
+ if (code > 0xffff) {
+ code -= 0x10000;
+ var surrogate1 = 0xd800 + (code >> 10),
+ surrogate2 = 0xdc00 + (code & 0x3ff);
+ return String.fromCharCode(surrogate1, surrogate2);
+ } else {
+ return String.fromCharCode(code);
+ }
+ }
+ function entityReplacer(a) {
+ var k = a.slice(1, -1);
+ if (Object.hasOwnProperty.call(entityMap, k)) {
+ return entityMap[k];
+ } else if (k.charAt(0) === '#') {
+ return fixedFromCharCode(parseInt(k.substr(1).replace('x', '0x')));
+ } else {
+ errorHandler.error('entity not found:' + a);
+ return a;
+ }
+ }
+ function appendText(end) {
+ //has some bugs
+ if (end > start) {
+ var xt = source.substring(start, end).replace(/&#?\w+;/g, entityReplacer);
+ locator && position(start);
+ domBuilder.characters(xt, 0, end - start);
+ start = end;
+ }
+ }
+ function position(p, m) {
+ while (p >= lineEnd && (m = linePattern.exec(source))) {
+ lineStart = m.index;
+ lineEnd = lineStart + m[0].length;
+ locator.lineNumber++;
+ //console.log('line++:',locator,startPos,endPos)
+ }
+
+ locator.columnNumber = p - lineStart + 1;
+ }
+ var lineStart = 0;
+ var lineEnd = 0;
+ var linePattern = /.*(?:\r\n?|\n)|.*$/g;
+ var locator = domBuilder.locator;
+ var parseStack = [{
+ currentNSMap: defaultNSMapCopy
+ }];
+ var closeMap = {};
+ var start = 0;
+ while (true) {
+ try {
+ var tagStart = source.indexOf('<', start);
+ if (tagStart < 0) {
+ if (!source.substr(start).match(/^\s*$/)) {
+ var doc = domBuilder.doc;
+ var text = doc.createTextNode(source.substr(start));
+ doc.appendChild(text);
+ domBuilder.currentElement = text;
+ }
+ return;
+ }
+ if (tagStart > start) {
+ appendText(tagStart);
+ }
+ switch (source.charAt(tagStart + 1)) {
+ case '/':
+ var end = source.indexOf('>', tagStart + 3);
+ var tagName = source.substring(tagStart + 2, end).replace(/[ \t\n\r]+$/g, '');
+ var config = parseStack.pop();
+ if (end < 0) {
+ tagName = source.substring(tagStart + 2).replace(/[\s<].*/, '');
+ errorHandler.error("end tag name: " + tagName + ' is not complete:' + config.tagName);
+ end = tagStart + 1 + tagName.length;
+ } else if (tagName.match(/\s</)) {
+ tagName = tagName.replace(/[\s<].*/, '');
+ errorHandler.error("end tag name: " + tagName + ' maybe not complete');
+ end = tagStart + 1 + tagName.length;
+ }
+ var localNSMap = config.localNSMap;
+ var endMatch = config.tagName == tagName;
+ var endIgnoreCaseMach = endMatch || config.tagName && config.tagName.toLowerCase() == tagName.toLowerCase();
+ if (endIgnoreCaseMach) {
+ domBuilder.endElement(config.uri, config.localName, tagName);
+ if (localNSMap) {
+ for (var prefix in localNSMap) {
+ if (Object.prototype.hasOwnProperty.call(localNSMap, prefix)) {
+ domBuilder.endPrefixMapping(prefix);
+ }
+ }
+ }
+ if (!endMatch) {
+ errorHandler.fatalError("end tag name: " + tagName + ' is not match the current start tagName:' + config.tagName); // No known test case
+ }
+ } else {
+ parseStack.push(config);
+ }
+ end++;
+ break;
+ // end elment
+ case '?':
+ // <?...?>
+ locator && position(tagStart);
+ end = parseInstruction(source, tagStart, domBuilder);
+ break;
+ case '!':
+ // <!doctype,<![CDATA,<!--
+ locator && position(tagStart);
+ end = parseDCC(source, tagStart, domBuilder, errorHandler);
+ break;
+ default:
+ locator && position(tagStart);
+ var el = new ElementAttributes();
+ var currentNSMap = parseStack[parseStack.length - 1].currentNSMap;
+ //elStartEnd
+ var end = parseElementStartPart(source, tagStart, el, currentNSMap, entityReplacer, errorHandler);
+ var len = el.length;
+ if (!el.closed && fixSelfClosed(source, end, el.tagName, closeMap)) {
+ el.closed = true;
+ if (!entityMap.nbsp) {
+ errorHandler.warning('unclosed xml attribute');
+ }
+ }
+ if (locator && len) {
+ var locator2 = copyLocator(locator, {});
+ //try{//attribute position fixed
+ for (var i = 0; i < len; i++) {
+ var a = el[i];
+ position(a.offset);
+ a.locator = copyLocator(locator, {});
+ }
+ domBuilder.locator = locator2;
+ if (appendElement$1(el, domBuilder, currentNSMap)) {
+ parseStack.push(el);
+ }
+ domBuilder.locator = locator;
+ } else {
+ if (appendElement$1(el, domBuilder, currentNSMap)) {
+ parseStack.push(el);
+ }
+ }
+ if (NAMESPACE$1.isHTML(el.uri) && !el.closed) {
+ end = parseHtmlSpecialContent(source, end, el.tagName, entityReplacer, domBuilder);
+ } else {
+ end++;
+ }
+ }
+ } catch (e) {
+ if (e instanceof ParseError$1) {
+ throw e;
+ }
+ errorHandler.error('element parse error: ' + e);
+ end = -1;
+ }
+ if (end > start) {
+ start = end;
+ } else {
+ //TODO: 这里有可能sax回退，有位置错误风险
+ appendText(Math.max(tagStart, start) + 1);
+ }
+ }
+ }
+ function copyLocator(f, t) {
+ t.lineNumber = f.lineNumber;
+ t.columnNumber = f.columnNumber;
+ return t;
+ }
+
+ /**
+ * @see #appendElement(source,elStartEnd,el,selfClosed,entityReplacer,domBuilder,parseStack);
+ * @return end of the elementStartPart(end of elementEndPart for selfClosed el)
+ */
+ function parseElementStartPart(source, start, el, currentNSMap, entityReplacer, errorHandler) {
+ /**
+ * @param {string} qname
+ * @param {string} value
+ * @param {number} startIndex
+ */
+ function addAttribute(qname, value, startIndex) {
+ if (el.attributeNames.hasOwnProperty(qname)) {
+ errorHandler.fatalError('Attribute ' + qname + ' redefined');
+ }
+ el.addValue(qname,
+ // @see https://www.w3.org/TR/xml/#AVNormalize
+ // since the xmldom sax parser does not "interpret" DTD the following is not implemented:
+ // - recursive replacement of (DTD) entity references
+ // - trimming and collapsing multiple spaces into a single one for attributes that are not of type CDATA
+ value.replace(/[\t\n\r]/g, ' ').replace(/&#?\w+;/g, entityReplacer), startIndex);
+ }
+ var attrName;
+ var value;
+ var p = ++start;
+ var s = S_TAG; //status
+ while (true) {
+ var c = source.charAt(p);
+ switch (c) {
+ case '=':
+ if (s === S_ATTR) {
+ //attrName
+ attrName = source.slice(start, p);
+ s = S_EQ;
+ } else if (s === S_ATTR_SPACE) {
+ s = S_EQ;
+ } else {
+ //fatalError: equal must after attrName or space after attrName
+ throw new Error('attribute equal must after attrName'); // No known test case
+ }
+
+ break;
+ case '\'':
+ case '"':
+ if (s === S_EQ || s === S_ATTR //|| s == S_ATTR_SPACE
+ ) {
+ //equal
+ if (s === S_ATTR) {
+ errorHandler.warning('attribute value must after "="');
+ attrName = source.slice(start, p);
+ }
+ start = p + 1;
+ p = source.indexOf(c, start);
+ if (p > 0) {
+ value = source.slice(start, p);
+ addAttribute(attrName, value, start - 1);
+ s = S_ATTR_END;
+ } else {
+ //fatalError: no end quot match
+ throw new Error('attribute value no end \'' + c + '\' match');
+ }
+ } else if (s == S_ATTR_NOQUOT_VALUE) {
+ value = source.slice(start, p);
+ addAttribute(attrName, value, start);
+ errorHandler.warning('attribute "' + attrName + '" missed start quot(' + c + ')!!');
+ start = p + 1;
+ s = S_ATTR_END;
+ } else {
+ //fatalError: no equal before
+ throw new Error('attribute value must after "="'); // No known test case
+ }
+
+ break;
+ case '/':
+ switch (s) {
+ case S_TAG:
+ el.setTagName(source.slice(start, p));
+ case S_ATTR_END:
+ case S_TAG_SPACE:
+ case S_TAG_CLOSE:
+ s = S_TAG_CLOSE;
+ el.closed = true;
+ case S_ATTR_NOQUOT_VALUE:
+ case S_ATTR:
+ break;
+ case S_ATTR_SPACE:
+ el.closed = true;
+ break;
+ //case S_EQ:
+ default:
+ throw new Error("attribute invalid close char('/')");
+ // No known test case
+ }
+
+ break;
+ case '':
+ //end document
+ errorHandler.error('unexpected end of input');
+ if (s == S_TAG) {
+ el.setTagName(source.slice(start, p));
+ }
+ return p;
+ case '>':
+ switch (s) {
+ case S_TAG:
+ el.setTagName(source.slice(start, p));
+ case S_ATTR_END:
+ case S_TAG_SPACE:
+ case S_TAG_CLOSE:
+ break;
+ //normal
+ case S_ATTR_NOQUOT_VALUE: //Compatible state
+ case S_ATTR:
+ value = source.slice(start, p);
+ if (value.slice(-1) === '/') {
+ el.closed = true;
+ value = value.slice(0, -1);
+ }
+ case S_ATTR_SPACE:
+ if (s === S_ATTR_SPACE) {
+ value = attrName;
+ }
+ if (s == S_ATTR_NOQUOT_VALUE) {
+ errorHandler.warning('attribute "' + value + '" missed quot(")!');
+ addAttribute(attrName, value, start);
+ } else {
+ if (!NAMESPACE$1.isHTML(currentNSMap['']) || !value.match(/^(?:disabled|checked|selected)$/i)) {
+ errorHandler.warning('attribute "' + value + '" missed value!! "' + value + '" instead!!');
+ }
+ addAttribute(value, value, start);
+ }
+ break;
+ case S_EQ:
+ throw new Error('attribute value missed!!');
+ }
+ // console.log(tagName,tagNamePattern,tagNamePattern.test(tagName))
+ return p;
+ /*xml space '\x20' | #x9 | #xD | #xA; */
+ case '\u0080':
+ c = ' ';
+ default:
+ if (c <= ' ') {
+ //space
+ switch (s) {
+ case S_TAG:
+ el.setTagName(source.slice(start, p)); //tagName
+ s = S_TAG_SPACE;
+ break;
+ case S_ATTR:
+ attrName = source.slice(start, p);
+ s = S_ATTR_SPACE;
+ break;
+ case S_ATTR_NOQUOT_VALUE:
+ var value = source.slice(start, p);
+ errorHandler.warning('attribute "' + value + '" missed quot(")!!');
+ addAttribute(attrName, value, start);
+ case S_ATTR_END:
+ s = S_TAG_SPACE;
+ break;
+ //case S_TAG_SPACE:
+ //case S_EQ:
+ //case S_ATTR_SPACE:
+ // void();break;
+ //case S_TAG_CLOSE:
+ //ignore warning
+ }
+ } else {
+ //not space
+ //S_TAG, S_ATTR, S_EQ, S_ATTR_NOQUOT_VALUE
+ //S_ATTR_SPACE, S_ATTR_END, S_TAG_SPACE, S_TAG_CLOSE
+ switch (s) {
+ //case S_TAG:void();break;
+ //case S_ATTR:void();break;
+ //case S_ATTR_NOQUOT_VALUE:void();break;
+ case S_ATTR_SPACE:
+ el.tagName;
+ if (!NAMESPACE$1.isHTML(currentNSMap['']) || !attrName.match(/^(?:disabled|checked|selected)$/i)) {
+ errorHandler.warning('attribute "' + attrName + '" missed value!! "' + attrName + '" instead2!!');
+ }
+ addAttribute(attrName, attrName, start);
+ start = p;
+ s = S_ATTR;
+ break;
+ case S_ATTR_END:
+ errorHandler.warning('attribute space is required"' + attrName + '"!!');
+ case S_TAG_SPACE:
+ s = S_ATTR;
+ start = p;
+ break;
+ case S_EQ:
+ s = S_ATTR_NOQUOT_VALUE;
+ start = p;
+ break;
+ case S_TAG_CLOSE:
+ throw new Error("elements closed character '/' and '>' must be connected to");
+ }
+ }
+ } //end outer switch
+ //console.log('p++',p)
+ p++;
+ }
+ }
+ /**
+ * @return true if has new namespace define
+ */
+ function appendElement$1(el, domBuilder, currentNSMap) {
+ var tagName = el.tagName;
+ var localNSMap = null;
+ //var currentNSMap = parseStack[parseStack.length-1].currentNSMap;
+ var i = el.length;
+ while (i--) {
+ var a = el[i];
+ var qName = a.qName;
+ var value = a.value;
+ var nsp = qName.indexOf(':');
+ if (nsp > 0) {
+ var prefix = a.prefix = qName.slice(0, nsp);
+ var localName = qName.slice(nsp + 1);
+ var nsPrefix = prefix === 'xmlns' && localName;
+ } else {
+ localName = qName;
+ prefix = null;
+ nsPrefix = qName === 'xmlns' && '';
+ }
+ //can not set prefix,because prefix !== ''
+ a.localName = localName;
+ //prefix == null for no ns prefix attribute
+ if (nsPrefix !== false) {
+ //hack!!
+ if (localNSMap == null) {
+ localNSMap = {};
+ //console.log(currentNSMap,0)
+ _copy(currentNSMap, currentNSMap = {});
+ //console.log(currentNSMap,1)
+ }
+
+ currentNSMap[nsPrefix] = localNSMap[nsPrefix] = value;
+ a.uri = NAMESPACE$1.XMLNS;
+ domBuilder.startPrefixMapping(nsPrefix, value);
+ }
+ }
+ var i = el.length;
+ while (i--) {
+ a = el[i];
+ var prefix = a.prefix;
+ if (prefix) {
+ //no prefix attribute has no namespace
+ if (prefix === 'xml') {
+ a.uri = NAMESPACE$1.XML;
+ }
+ if (prefix !== 'xmlns') {
+ a.uri = currentNSMap[prefix || ''];
+
+ //{console.log('###'+a.qName,domBuilder.locator.systemId+'',currentNSMap,a.uri)}
+ }
+ }
+ }
+
+ var nsp = tagName.indexOf(':');
+ if (nsp > 0) {
+ prefix = el.prefix = tagName.slice(0, nsp);
+ localName = el.localName = tagName.slice(nsp + 1);
+ } else {
+ prefix = null; //important!!
+ localName = el.localName = tagName;
+ }
+ //no prefix element has default namespace
+ var ns = el.uri = currentNSMap[prefix || ''];
+ domBuilder.startElement(ns, localName, tagName, el);
+ //endPrefixMapping and startPrefixMapping have not any help for dom builder
+ //localNSMap = null
+ if (el.closed) {
+ domBuilder.endElement(ns, localName, tagName);
+ if (localNSMap) {
+ for (prefix in localNSMap) {
+ if (Object.prototype.hasOwnProperty.call(localNSMap, prefix)) {
+ domBuilder.endPrefixMapping(prefix);
+ }
+ }
+ }
+ } else {
+ el.currentNSMap = currentNSMap;
+ el.localNSMap = localNSMap;
+ //parseStack.push(el);
+ return true;
+ }
+ }
+ function parseHtmlSpecialContent(source, elStartEnd, tagName, entityReplacer, domBuilder) {
+ if (/^(?:script|textarea)$/i.test(tagName)) {
+ var elEndStart = source.indexOf('</' + tagName + '>', elStartEnd);
+ var text = source.substring(elStartEnd + 1, elEndStart);
+ if (/[&<]/.test(text)) {
+ if (/^script$/i.test(tagName)) {
+ //if(!/\]\]>/.test(text)){
+ //lexHandler.startCDATA();
+ domBuilder.characters(text, 0, text.length);
+ //lexHandler.endCDATA();
+ return elEndStart;
+ //}
+ } //}else{//text area
+ text = text.replace(/&#?\w+;/g, entityReplacer);
+ domBuilder.characters(text, 0, text.length);
+ return elEndStart;
+ //}
+ }
+ }
+
+ return elStartEnd + 1;
+ }
+ function fixSelfClosed(source, elStartEnd, tagName, closeMap) {
+ //if(tagName in closeMap){
+ var pos = closeMap[tagName];
+ if (pos == null) {
+ //console.log(tagName)
+ pos = source.lastIndexOf('</' + tagName + '>');
+ if (pos < elStartEnd) {
+ //忘记闭合
+ pos = source.lastIndexOf('</' + tagName);
+ }
+ closeMap[tagName] = pos;
+ }
+ return pos < elStartEnd;
+ //}
+ }
+
+ function _copy(source, target) {
+ for (var n in source) {
+ if (Object.prototype.hasOwnProperty.call(source, n)) {
+ target[n] = source[n];
+ }
+ }
+ }
+ function parseDCC(source, start, domBuilder, errorHandler) {
+ //sure start with '<!'
+ var next = source.charAt(start + 2);
+ switch (next) {
+ case '-':
+ if (source.charAt(start + 3) === '-') {
+ var end = source.indexOf('-->', start + 4);
+ //append comment source.substring(4,end)//<!--
+ if (end > start) {
+ domBuilder.comment(source, start + 4, end - start - 4);
+ return end + 3;
+ } else {
+ errorHandler.error("Unclosed comment");
+ return -1;
+ }
+ } else {
+ //error
+ return -1;
+ }
+ default:
+ if (source.substr(start + 3, 6) == 'CDATA[') {
+ var end = source.indexOf(']]>', start + 9);
+ domBuilder.startCDATA();
+ domBuilder.characters(source, start + 9, end - start - 9);
+ domBuilder.endCDATA();
+ return end + 3;
+ }
+ //<!DOCTYPE
+ //startDTD(java.lang.String name, java.lang.String publicId, java.lang.String systemId)
+ var matchs = split(source, start);
+ var len = matchs.length;
+ if (len > 1 && /!doctype/i.test(matchs[0][0])) {
+ var name = matchs[1][0];
+ var pubid = false;
+ var sysid = false;
+ if (len > 3) {
+ if (/^public$/i.test(matchs[2][0])) {
+ pubid = matchs[3][0];
+ sysid = len > 4 && matchs[4][0];
+ } else if (/^system$/i.test(matchs[2][0])) {
+ sysid = matchs[3][0];
+ }
+ }
+ var lastMatch = matchs[len - 1];
+ domBuilder.startDTD(name, pubid, sysid);
+ domBuilder.endDTD();
+ return lastMatch.index + lastMatch[0].length;
+ }
+ }
+ return -1;
+ }
+ function parseInstruction(source, start, domBuilder) {
+ var end = source.indexOf('?>', start);
+ if (end) {
+ var match = source.substring(start, end).match(/^<\?(\S*)\s*([\s\S]*?)\s*$/);
+ if (match) {
+ match[0].length;
+ domBuilder.processingInstruction(match[1], match[2]);
+ return end + 2;
+ } else {
+ //error
+ return -1;
+ }
+ }
+ return -1;
+ }
+ function ElementAttributes() {
+ this.attributeNames = {};
+ }
+ ElementAttributes.prototype = {
+ setTagName: function (tagName) {
+ if (!tagNamePattern.test(tagName)) {
+ throw new Error('invalid tagName:' + tagName);
+ }
+ this.tagName = tagName;
+ },
+ addValue: function (qName, value, offset) {
+ if (!tagNamePattern.test(qName)) {
+ throw new Error('invalid attribute:' + qName);
+ }
+ this.attributeNames[qName] = this.length;
+ this[this.length++] = {
+ qName: qName,
+ value: value,
+ offset: offset
+ };
+ },
+ length: 0,
+ getLocalName: function (i) {
+ return this[i].localName;
+ },
+ getLocator: function (i) {
+ return this[i].locator;
+ },
+ getQName: function (i) {
+ return this[i].qName;
+ },
+ getURI: function (i) {
+ return this[i].uri;
+ },
+ getValue: function (i) {
+ return this[i].value;
+ }
+ // ,getIndex:function(uri, localName)){
+ // if(localName){
+ //
+ // }else{
+ // var qName = uri
+ // }
+ // },
+ // getValue:function(){return this.getValue(this.getIndex.apply(this,arguments))},
+ // getType:function(uri,localName){}
+ // getType:function(i){},
+ };
+
+ function split(source, start) {
+ var match;
+ var buf = [];
+ var reg = /'[^']+'|"[^"]+"|[^\s<>\/=]+=?|(\/?\s*>|<)/g;
+ reg.lastIndex = start;
+ reg.exec(source); //skip <
+ while (match = reg.exec(source)) {
+ buf.push(match);
+ if (match[1]) return buf;
+ }
+ }
+ var XMLReader_1 = XMLReader$1;
+ var ParseError_1 = ParseError$1;
+ var sax = {
+ XMLReader: XMLReader_1,
+ ParseError: ParseError_1
+ };
+
+ var DOMImplementation = dom.DOMImplementation;
+ var NAMESPACE = conventions.NAMESPACE;
+ var ParseError = sax.ParseError;
+ var XMLReader = sax.XMLReader;
+
+ /**
+ * Normalizes line ending according to https://www.w3.org/TR/xml11/#sec-line-ends:
+ *
+ * > XML parsed entities are often stored in computer files which,
+ * > for editing convenience, are organized into lines.
+ * > These lines are typically separated by some combination
+ * > of the characters CARRIAGE RETURN (#xD) and LINE FEED (#xA).
+ * >
+ * > To simplify the tasks of applications, the XML processor must behave
+ * > as if it normalized all line breaks in external parsed entities (including the document entity)
+ * > on input, before parsing, by translating all of the following to a single #xA character:
+ * >
+ * > 1. the two-character sequence #xD #xA
+ * > 2. the two-character sequence #xD #x85
+ * > 3. the single character #x85
+ * > 4. the single character #x2028
+ * > 5. any #xD character that is not immediately followed by #xA or #x85.
+ *
+ * @param {string} input
+ * @returns {string}
+ */
+ function normalizeLineEndings(input) {
+ return input.replace(/\r[\n\u0085]/g, '\n').replace(/[\r\u0085\u2028]/g, '\n');
+ }
+
+ /**
+ * @typedef Locator
+ * @property {number} [columnNumber]
+ * @property {number} [lineNumber]
+ */
+
+ /**
+ * @typedef DOMParserOptions
+ * @property {DOMHandler} [domBuilder]
+ * @property {Function} [errorHandler]
+ * @property {(string) => string} [normalizeLineEndings] used to replace line endings before parsing
+ * defaults to `normalizeLineEndings`
+ * @property {Locator} [locator]
+ * @property {Record<string, string>} [xmlns]
+ *
+ * @see normalizeLineEndings
+ */
+
+ /**
+ * The DOMParser interface provides the ability to parse XML or HTML source code
+ * from a string into a DOM `Document`.
+ *
+ * _xmldom is different from the spec in that it allows an `options` parameter,
+ * to override the default behavior._
+ *
+ * @param {DOMParserOptions} [options]
+ * @constructor
+ *
+ * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMParser
+ * @see https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#dom-parsing-and-serialization
+ */
+ function DOMParser$1(options) {
+ this.options = options || {
+ locator: {}
+ };
+ }
+ DOMParser$1.prototype.parseFromString = function (source, mimeType) {
+ var options = this.options;
+ var sax = new XMLReader();
+ var domBuilder = options.domBuilder || new DOMHandler(); //contentHandler and LexicalHandler
+ var errorHandler = options.errorHandler;
+ var locator = options.locator;
+ var defaultNSMap = options.xmlns || {};
+ var isHTML = /\/x?html?$/.test(mimeType); //mimeType.toLowerCase().indexOf('html') > -1;
+ var entityMap = isHTML ? entities.HTML_ENTITIES : entities.XML_ENTITIES;
+ if (locator) {
+ domBuilder.setDocumentLocator(locator);
+ }
+ sax.errorHandler = buildErrorHandler(errorHandler, domBuilder, locator);
+ sax.domBuilder = options.domBuilder || domBuilder;
+ if (isHTML) {
+ defaultNSMap[''] = NAMESPACE.HTML;
+ }
+ defaultNSMap.xml = defaultNSMap.xml || NAMESPACE.XML;
+ var normalize = options.normalizeLineEndings || normalizeLineEndings;
+ if (source && typeof source === 'string') {
+ sax.parse(normalize(source), defaultNSMap, entityMap);
+ } else {
+ sax.errorHandler.error('invalid doc source');
+ }
+ return domBuilder.doc;
+ };
+ function buildErrorHandler(errorImpl, domBuilder, locator) {
+ if (!errorImpl) {
+ if (domBuilder instanceof DOMHandler) {
+ return domBuilder;
+ }
+ errorImpl = domBuilder;
+ }
+ var errorHandler = {};
+ var isCallback = errorImpl instanceof Function;
+ locator = locator || {};
+ function build(key) {
+ var fn = errorImpl[key];
+ if (!fn && isCallback) {
+ fn = errorImpl.length == 2 ? function (msg) {
+ errorImpl(key, msg);
+ } : errorImpl;
+ }
+ errorHandler[key] = fn && function (msg) {
+ fn('[xmldom ' + key + ']\t' + msg + _locator(locator));
+ } || function () {};
+ }
+ build('warning');
+ build('error');
+ build('fatalError');
+ return errorHandler;
+ }
+
+ //console.log('#\n\n\n\n\n\n\n####')
+ /**
+ * +ContentHandler+ErrorHandler
+ * +LexicalHandler+EntityResolver2
+ * -DeclHandler-DTDHandler
+ *
+ * DefaultHandler:EntityResolver, DTDHandler, ContentHandler, ErrorHandler
+ * DefaultHandler2:DefaultHandler,LexicalHandler, DeclHandler, EntityResolver2
+ * @link http://www.saxproject.org/apidoc/org/xml/sax/helpers/DefaultHandler.html
+ */
+ function DOMHandler() {
+ this.cdata = false;
+ }
+ function position(locator, node) {
+ node.lineNumber = locator.lineNumber;
+ node.columnNumber = locator.columnNumber;
+ }
+ /**
+ * @see org.xml.sax.ContentHandler#startDocument
+ * @link http://www.saxproject.org/apidoc/org/xml/sax/ContentHandler.html
+ */
+ DOMHandler.prototype = {
+ startDocument: function () {
+ this.doc = new DOMImplementation().createDocument(null, null, null);
+ if (this.locator) {
+ this.doc.documentURI = this.locator.systemId;
+ }
+ },
+ startElement: function (namespaceURI, localName, qName, attrs) {
+ var doc = this.doc;
+ var el = doc.createElementNS(namespaceURI, qName || localName);
+ var len = attrs.length;
+ appendElement(this, el);
+ this.currentElement = el;
+ this.locator && position(this.locator, el);
+ for (var i = 0; i < len; i++) {
+ var namespaceURI = attrs.getURI(i);
+ var value = attrs.getValue(i);
+ var qName = attrs.getQName(i);
+ var attr = doc.createAttributeNS(namespaceURI, qName);
+ this.locator && position(attrs.getLocator(i), attr);
+ attr.value = attr.nodeValue = value;
+ el.setAttributeNode(attr);
+ }
+ },
+ endElement: function (namespaceURI, localName, qName) {
+ var current = this.currentElement;
+ current.tagName;
+ this.currentElement = current.parentNode;
+ },
+ startPrefixMapping: function (prefix, uri) {},
+ endPrefixMapping: function (prefix) {},
+ processingInstruction: function (target, data) {
+ var ins = this.doc.createProcessingInstruction(target, data);
+ this.locator && position(this.locator, ins);
+ appendElement(this, ins);
+ },
+ ignorableWhitespace: function (ch, start, length) {},
+ characters: function (chars, start, length) {
+ chars = _toString.apply(this, arguments);
+ //console.log(chars)
+ if (chars) {
+ if (this.cdata) {
+ var charNode = this.doc.createCDATASection(chars);
+ } else {
+ var charNode = this.doc.createTextNode(chars);
+ }
+ if (this.currentElement) {
+ this.currentElement.appendChild(charNode);
+ } else if (/^\s*$/.test(chars)) {
+ this.doc.appendChild(charNode);
+ //process xml
+ }
+
+ this.locator && position(this.locator, charNode);
+ }
+ },
+ skippedEntity: function (name) {},
+ endDocument: function () {
+ this.doc.normalize();
+ },
+ setDocumentLocator: function (locator) {
+ if (this.locator = locator) {
+ // && !('lineNumber' in locator)){
+ locator.lineNumber = 0;
+ }
+ },
+ //LexicalHandler
+ comment: function (chars, start, length) {
+ chars = _toString.apply(this, arguments);
+ var comm = this.doc.createComment(chars);
+ this.locator && position(this.locator, comm);
+ appendElement(this, comm);
+ },
+ startCDATA: function () {
+ //used in characters() methods
+ this.cdata = true;
+ },
+ endCDATA: function () {
+ this.cdata = false;
+ },
+ startDTD: function (name, publicId, systemId) {
+ var impl = this.doc.implementation;
+ if (impl && impl.createDocumentType) {
+ var dt = impl.createDocumentType(name, publicId, systemId);
+ this.locator && position(this.locator, dt);
+ appendElement(this, dt);
+ this.doc.doctype = dt;
+ }
+ },
+ /**
+ * @see org.xml.sax.ErrorHandler
+ * @link http://www.saxproject.org/apidoc/org/xml/sax/ErrorHandler.html
+ */
+ warning: function (error) {
+ console.warn('[xmldom warning]\t' + error, _locator(this.locator));
+ },
+ error: function (error) {
+ console.error('[xmldom error]\t' + error, _locator(this.locator));
+ },
+ fatalError: function (error) {
+ throw new ParseError(error, this.locator);
+ }
+ };
+ function _locator(l) {
+ if (l) {
+ return '\n@' + (l.systemId || '') + '#[line:' + l.lineNumber + ',col:' + l.columnNumber + ']';
+ }
+ }
+ function _toString(chars, start, length) {
+ if (typeof chars == 'string') {
+ return chars.substr(start, length);
+ } else {
+ //java sax connect width xmldom on rhino(what about: "? && !(chars instanceof String)")
+ if (chars.length >= start + length || start) {
+ return new java.lang.String(chars, start, length) + '';
+ }
+ return chars;
+ }
+ }
+
+ /*
+ * @link http://www.saxproject.org/apidoc/org/xml/sax/ext/LexicalHandler.html
+ * used method of org.xml.sax.ext.LexicalHandler:
+ * #comment(chars, start, length)
+ * #startCDATA()
+ * #endCDATA()
+ * #startDTD(name, publicId, systemId)
+ *
+ *
+ * IGNORED method of org.xml.sax.ext.LexicalHandler:
+ * #endDTD()
+ * #startEntity(name)
+ * #endEntity(name)
+ *
+ *
+ * @link http://www.saxproject.org/apidoc/org/xml/sax/ext/DeclHandler.html
+ * IGNORED method of org.xml.sax.ext.DeclHandler
+ * #attributeDecl(eName, aName, type, mode, value)
+ * #elementDecl(name, model)
+ * #externalEntityDecl(name, publicId, systemId)
+ * #internalEntityDecl(name, value)
+ * @link http://www.saxproject.org/apidoc/org/xml/sax/ext/EntityResolver2.html
+ * IGNORED method of org.xml.sax.EntityResolver2
+ * #resolveEntity(String name,String publicId,String baseURI,String systemId)
+ * #resolveEntity(publicId, systemId)
+ * #getExternalSubset(name, baseURI)
+ * @link http://www.saxproject.org/apidoc/org/xml/sax/DTDHandler.html
+ * IGNORED method of org.xml.sax.DTDHandler
+ * #notationDecl(name, publicId, systemId) {};
+ * #unparsedEntityDecl(name, publicId, systemId, notationName) {};
+ */
+ "endDTD,startEntity,endEntity,attributeDecl,elementDecl,externalEntityDecl,internalEntityDecl,resolveEntity,getExternalSubset,notationDecl,unparsedEntityDecl".replace(/\w+/g, function (key) {
+ DOMHandler.prototype[key] = function () {
+ return null;
+ };
+ });
+
+ /* Private static helpers treated below as private instance methods, so don't need to add these to the public API; we might use a Relator to also get rid of non-standard public properties */
+ function appendElement(hander, node) {
+ if (!hander.currentElement) {
+ hander.doc.appendChild(node);
+ } else {
+ hander.currentElement.appendChild(node);
+ }
+ } //appendChild and setAttributeNS are preformance key
+
+ var __DOMHandler = DOMHandler;
+ var normalizeLineEndings_1 = normalizeLineEndings;
+ var DOMParser_1 = DOMParser$1;
+ var domParser = {
+ __DOMHandler: __DOMHandler,
+ normalizeLineEndings: normalizeLineEndings_1,
+ DOMParser: DOMParser_1
+ };
+
+ var DOMParser = domParser.DOMParser;
+
+ /*! @name mpd-parser @version 1.3.0 @license Apache-2.0 */
+ const isObject = obj => {
+ return !!obj && typeof obj === 'object';
+ };
+ const merge$1 = (...objects) => {
+ return objects.reduce((result, source) => {
+ if (typeof source !== 'object') {
+ return result;
+ }
+ Object.keys(source).forEach(key => {
+ if (Array.isArray(result[key]) && Array.isArray(source[key])) {
+ result[key] = result[key].concat(source[key]);
+ } else if (isObject(result[key]) && isObject(source[key])) {
+ result[key] = merge$1(result[key], source[key]);
+ } else {
+ result[key] = source[key];
+ }
+ });
+ return result;
+ }, {});
+ };
+ const values = o => Object.keys(o).map(k => o[k]);
+ const range = (start, end) => {
+ const result = [];
+ for (let i = start; i < end; i++) {
+ result.push(i);
+ }
+ return result;
+ };
+ const flatten = lists => lists.reduce((x, y) => x.concat(y), []);
+ const from = list => {
+ if (!list.length) {
+ return [];
+ }
+ const result = [];
+ for (let i = 0; i < list.length; i++) {
+ result.push(list[i]);
+ }
+ return result;
+ };
+ const findIndexes = (l, key) => l.reduce((a, e, i) => {
+ if (e[key]) {
+ a.push(i);
+ }
+ return a;
+ }, []);
+ /**
+ * Returns a union of the included lists provided each element can be identified by a key.
+ *
+ * @param {Array} list - list of lists to get the union of
+ * @param {Function} keyFunction - the function to use as a key for each element
+ *
+ * @return {Array} the union of the arrays
+ */
+
+ const union = (lists, keyFunction) => {
+ return values(lists.reduce((acc, list) => {
+ list.forEach(el => {
+ acc[keyFunction(el)] = el;
+ });
+ return acc;
+ }, {}));
+ };
+ var errors = {
+ INVALID_NUMBER_OF_PERIOD: 'INVALID_NUMBER_OF_PERIOD',
+ INVALID_NUMBER_OF_CONTENT_STEERING: 'INVALID_NUMBER_OF_CONTENT_STEERING',
+ DASH_EMPTY_MANIFEST: 'DASH_EMPTY_MANIFEST',
+ DASH_INVALID_XML: 'DASH_INVALID_XML',
+ NO_BASE_URL: 'NO_BASE_URL',
+ MISSING_SEGMENT_INFORMATION: 'MISSING_SEGMENT_INFORMATION',
+ SEGMENT_TIME_UNSPECIFIED: 'SEGMENT_TIME_UNSPECIFIED',
+ UNSUPPORTED_UTC_TIMING_SCHEME: 'UNSUPPORTED_UTC_TIMING_SCHEME'
+ };
+
+ /**
+ * @typedef {Object} SingleUri
+ * @property {string} uri - relative location of segment
+ * @property {string} resolvedUri - resolved location of segment
+ * @property {Object} byterange - Object containing information on how to make byte range
+ * requests following byte-range-spec per RFC2616.
+ * @property {String} byterange.length - length of range request
+ * @property {String} byterange.offset - byte offset of range request
+ *
+ * @see https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.35.1
+ */
+
+ /**
+ * Converts a URLType node (5.3.9.2.3 Table 13) to a segment object
+ * that conforms to how m3u8-parser is structured
+ *
+ * @see https://github.com/videojs/m3u8-parser
+ *
+ * @param {string} baseUrl - baseUrl provided by <BaseUrl> nodes
+ * @param {string} source - source url for segment
+ * @param {string} range - optional range used for range calls,
+ * follows RFC 2616, Clause 14.35.1
+ * @return {SingleUri} full segment information transformed into a format similar
+ * to m3u8-parser
+ */
+
+ const urlTypeToSegment = ({
+ baseUrl = '',
+ source = '',
+ range = '',
+ indexRange = ''
+ }) => {
+ const segment = {
+ uri: source,
+ resolvedUri: resolveUrl$1(baseUrl || '', source)
+ };
+ if (range || indexRange) {
+ const rangeStr = range ? range : indexRange;
+ const ranges = rangeStr.split('-'); // default to parsing this as a BigInt if possible
+
+ let startRange = window.BigInt ? window.BigInt(ranges[0]) : parseInt(ranges[0], 10);
+ let endRange = window.BigInt ? window.BigInt(ranges[1]) : parseInt(ranges[1], 10); // convert back to a number if less than MAX_SAFE_INTEGER
+
+ if (startRange < Number.MAX_SAFE_INTEGER && typeof startRange === 'bigint') {
+ startRange = Number(startRange);
+ }
+ if (endRange < Number.MAX_SAFE_INTEGER && typeof endRange === 'bigint') {
+ endRange = Number(endRange);
+ }
+ let length;
+ if (typeof endRange === 'bigint' || typeof startRange === 'bigint') {
+ length = window.BigInt(endRange) - window.BigInt(startRange) + window.BigInt(1);
+ } else {
+ length = endRange - startRange + 1;
+ }
+ if (typeof length === 'bigint' && length < Number.MAX_SAFE_INTEGER) {
+ length = Number(length);
+ } // byterange should be inclusive according to
+ // RFC 2616, Clause 14.35.1
+
+ segment.byterange = {
+ length,
+ offset: startRange
+ };
+ }
+ return segment;
+ };
+ const byteRangeToString = byterange => {
+ // `endRange` is one less than `offset + length` because the HTTP range
+ // header uses inclusive ranges
+ let endRange;
+ if (typeof byterange.offset === 'bigint' || typeof byterange.length === 'bigint') {
+ endRange = window.BigInt(byterange.offset) + window.BigInt(byterange.length) - window.BigInt(1);
+ } else {
+ endRange = byterange.offset + byterange.length - 1;
+ }
+ return `${byterange.offset}-${endRange}`;
+ };
+
+ /**
+ * parse the end number attribue that can be a string
+ * number, or undefined.
+ *
+ * @param {string|number|undefined} endNumber
+ * The end number attribute.
+ *
+ * @return {number|null}
+ * The result of parsing the end number.
+ */
+
+ const parseEndNumber = endNumber => {
+ if (endNumber && typeof endNumber !== 'number') {
+ endNumber = parseInt(endNumber, 10);
+ }
+ if (isNaN(endNumber)) {
+ return null;
+ }
+ return endNumber;
+ };
+ /**
+ * Functions for calculating the range of available segments in static and dynamic
+ * manifests.
+ */
+
+ const segmentRange = {
+ /**
+ * Returns the entire range of available segments for a static MPD
+ *
+ * @param {Object} attributes
+ * Inheritied MPD attributes
+ * @return {{ start: number, end: number }}
+ * The start and end numbers for available segments
+ */
+ static(attributes) {
+ const {
+ duration,
+ timescale = 1,
+ sourceDuration,
+ periodDuration
+ } = attributes;
+ const endNumber = parseEndNumber(attributes.endNumber);
+ const segmentDuration = duration / timescale;
+ if (typeof endNumber === 'number') {
+ return {
+ start: 0,
+ end: endNumber
+ };
+ }
+ if (typeof periodDuration === 'number') {
+ return {
+ start: 0,
+ end: periodDuration / segmentDuration
+ };
+ }
+ return {
+ start: 0,
+ end: sourceDuration / segmentDuration
+ };
+ },
+ /**
+ * Returns the current live window range of available segments for a dynamic MPD
+ *
+ * @param {Object} attributes
+ * Inheritied MPD attributes
+ * @return {{ start: number, end: number }}
+ * The start and end numbers for available segments
+ */
+ dynamic(attributes) {
+ const {
+ NOW,
+ clientOffset,
+ availabilityStartTime,
+ timescale = 1,
+ duration,
+ periodStart = 0,
+ minimumUpdatePeriod = 0,
+ timeShiftBufferDepth = Infinity
+ } = attributes;
+ const endNumber = parseEndNumber(attributes.endNumber); // clientOffset is passed in at the top level of mpd-parser and is an offset calculated
+ // after retrieving UTC server time.
+
+ const now = (NOW + clientOffset) / 1000; // WC stands for Wall Clock.
+ // Convert the period start time to EPOCH.
+
+ const periodStartWC = availabilityStartTime + periodStart; // Period end in EPOCH is manifest's retrieval time + time until next update.
+
+ const periodEndWC = now + minimumUpdatePeriod;
+ const periodDuration = periodEndWC - periodStartWC;
+ const segmentCount = Math.ceil(periodDuration * timescale / duration);
+ const availableStart = Math.floor((now - periodStartWC - timeShiftBufferDepth) * timescale / duration);
+ const availableEnd = Math.floor((now - periodStartWC) * timescale / duration);
+ return {
+ start: Math.max(0, availableStart),
+ end: typeof endNumber === 'number' ? endNumber : Math.min(segmentCount, availableEnd)
+ };
+ }
+ };
+ /**
+ * Maps a range of numbers to objects with information needed to build the corresponding
+ * segment list
+ *
+ * @name toSegmentsCallback
+ * @function
+ * @param {number} number
+ * Number of the segment
+ * @param {number} index
+ * Index of the number in the range list
+ * @return {{ number: Number, duration: Number, timeline: Number, time: Number }}
+ * Object with segment timing and duration info
+ */
+
+ /**
+ * Returns a callback for Array.prototype.map for mapping a range of numbers to
+ * information needed to build the segment list.
+ *
+ * @param {Object} attributes
+ * Inherited MPD attributes
+ * @return {toSegmentsCallback}
+ * Callback map function
+ */
+
+ const toSegments = attributes => number => {
+ const {
+ duration,
+ timescale = 1,
+ periodStart,
+ startNumber = 1
+ } = attributes;
+ return {
+ number: startNumber + number,
+ duration: duration / timescale,
+ timeline: periodStart,
+ time: number * duration
+ };
+ };
+ /**
+ * Returns a list of objects containing segment timing and duration info used for
+ * building the list of segments. This uses the @duration attribute specified
+ * in the MPD manifest to derive the range of segments.
+ *
+ * @param {Object} attributes
+ * Inherited MPD attributes
+ * @return {{number: number, duration: number, time: number, timeline: number}[]}
+ * List of Objects with segment timing and duration info
+ */
+
+ const parseByDuration = attributes => {
+ const {
+ type,
+ duration,
+ timescale = 1,
+ periodDuration,
+ sourceDuration
+ } = attributes;
+ const {
+ start,
+ end
+ } = segmentRange[type](attributes);
+ const segments = range(start, end).map(toSegments(attributes));
+ if (type === 'static') {
+ const index = segments.length - 1; // section is either a period or the full source
+
+ const sectionDuration = typeof periodDuration === 'number' ? periodDuration : sourceDuration; // final segment may be less than full segment duration
+
+ segments[index].duration = sectionDuration - duration / timescale * index;
+ }
+ return segments;
+ };
+
+ /**
+ * Translates SegmentBase into a set of segments.
+ * (DASH SPEC Section 5.3.9.3.2) contains a set of <SegmentURL> nodes. Each
+ * node should be translated into segment.
+ *
+ * @param {Object} attributes
+ * Object containing all inherited attributes from parent elements with attribute
+ * names as keys
+ * @return {Object.<Array>} list of segments
+ */
+
+ const segmentsFromBase = attributes => {
+ const {
+ baseUrl,
+ initialization = {},
+ sourceDuration,
+ indexRange = '',
+ periodStart,
+ presentationTime,
+ number = 0,
+ duration
+ } = attributes; // base url is required for SegmentBase to work, per spec (Section 5.3.9.2.1)
+
+ if (!baseUrl) {
+ throw new Error(errors.NO_BASE_URL);
+ }
+ const initSegment = urlTypeToSegment({
+ baseUrl,
+ source: initialization.sourceURL,
+ range: initialization.range
+ });
+ const segment = urlTypeToSegment({
+ baseUrl,
+ source: baseUrl,
+ indexRange
+ });
+ segment.map = initSegment; // If there is a duration, use it, otherwise use the given duration of the source
+ // (since SegmentBase is only for one total segment)
+
+ if (duration) {
+ const segmentTimeInfo = parseByDuration(attributes);
+ if (segmentTimeInfo.length) {
+ segment.duration = segmentTimeInfo[0].duration;
+ segment.timeline = segmentTimeInfo[0].timeline;
+ }
+ } else if (sourceDuration) {
+ segment.duration = sourceDuration;
+ segment.timeline = periodStart;
+ } // If presentation time is provided, these segments are being generated by SIDX
+ // references, and should use the time provided. For the general case of SegmentBase,
+ // there should only be one segment in the period, so its presentation time is the same
+ // as its period start.
+
+ segment.presentationTime = presentationTime || periodStart;
+ segment.number = number;
+ return [segment];
+ };
+ /**
+ * Given a playlist, a sidx box, and a baseUrl, update the segment list of the playlist
+ * according to the sidx information given.
+ *
+ * playlist.sidx has metadadata about the sidx where-as the sidx param
+ * is the parsed sidx box itself.
+ *
+ * @param {Object} playlist the playlist to update the sidx information for
+ * @param {Object} sidx the parsed sidx box
+ * @return {Object} the playlist object with the updated sidx information
+ */
+
+ const addSidxSegmentsToPlaylist$1 = (playlist, sidx, baseUrl) => {
+ // Retain init segment information
+ const initSegment = playlist.sidx.map ? playlist.sidx.map : null; // Retain source duration from initial main manifest parsing
+
+ const sourceDuration = playlist.sidx.duration; // Retain source timeline
+
+ const timeline = playlist.timeline || 0;
+ const sidxByteRange = playlist.sidx.byterange;
+ const sidxEnd = sidxByteRange.offset + sidxByteRange.length; // Retain timescale of the parsed sidx
+
+ const timescale = sidx.timescale; // referenceType 1 refers to other sidx boxes
+
+ const mediaReferences = sidx.references.filter(r => r.referenceType !== 1);
+ const segments = [];
+ const type = playlist.endList ? 'static' : 'dynamic';
+ const periodStart = playlist.sidx.timeline;
+ let presentationTime = periodStart;
+ let number = playlist.mediaSequence || 0; // firstOffset is the offset from the end of the sidx box
+
+ let startIndex; // eslint-disable-next-line
+
+ if (typeof sidx.firstOffset === 'bigint') {
+ startIndex = window.BigInt(sidxEnd) + sidx.firstOffset;
+ } else {
+ startIndex = sidxEnd + sidx.firstOffset;
+ }
+ for (let i = 0; i < mediaReferences.length; i++) {
+ const reference = sidx.references[i]; // size of the referenced (sub)segment
+
+ const size = reference.referencedSize; // duration of the referenced (sub)segment, in the timescale
+ // this will be converted to seconds when generating segments
+
+ const duration = reference.subsegmentDuration; // should be an inclusive range
+
+ let endIndex; // eslint-disable-next-line
+
+ if (typeof startIndex === 'bigint') {
+ endIndex = startIndex + window.BigInt(size) - window.BigInt(1);
+ } else {
+ endIndex = startIndex + size - 1;
+ }
+ const indexRange = `${startIndex}-${endIndex}`;
+ const attributes = {
+ baseUrl,
+ timescale,
+ timeline,
+ periodStart,
+ presentationTime,
+ number,
+ duration,
+ sourceDuration,
+ indexRange,
+ type
+ };
+ const segment = segmentsFromBase(attributes)[0];
+ if (initSegment) {
+ segment.map = initSegment;
+ }
+ segments.push(segment);
+ if (typeof startIndex === 'bigint') {
+ startIndex += window.BigInt(size);
+ } else {
+ startIndex += size;
+ }
+ presentationTime += duration / timescale;
+ number++;
+ }
+ playlist.segments = segments;
+ return playlist;
+ };
+ const SUPPORTED_MEDIA_TYPES = ['AUDIO', 'SUBTITLES']; // allow one 60fps frame as leniency (arbitrarily chosen)
+
+ const TIME_FUDGE = 1 / 60;
+ /**
+ * Given a list of timelineStarts, combines, dedupes, and sorts them.
+ *
+ * @param {TimelineStart[]} timelineStarts - list of timeline starts
+ *
+ * @return {TimelineStart[]} the combined and deduped timeline starts
+ */
+
+ const getUniqueTimelineStarts = timelineStarts => {
+ return union(timelineStarts, ({
+ timeline
+ }) => timeline).sort((a, b) => a.timeline > b.timeline ? 1 : -1);
+ };
+ /**
+ * Finds the playlist with the matching NAME attribute.
+ *
+ * @param {Array} playlists - playlists to search through
+ * @param {string} name - the NAME attribute to search for
+ *
+ * @return {Object|null} the matching playlist object, or null
+ */
+
+ const findPlaylistWithName = (playlists, name) => {
+ for (let i = 0; i < playlists.length; i++) {
+ if (playlists[i].attributes.NAME === name) {
+ return playlists[i];
+ }
+ }
+ return null;
+ };
+ /**
+ * Gets a flattened array of media group playlists.
+ *
+ * @param {Object} manifest - the main manifest object
+ *
+ * @return {Array} the media group playlists
+ */
+
+ const getMediaGroupPlaylists = manifest => {
+ let mediaGroupPlaylists = [];
+ forEachMediaGroup$1(manifest, SUPPORTED_MEDIA_TYPES, (properties, type, group, label) => {
+ mediaGroupPlaylists = mediaGroupPlaylists.concat(properties.playlists || []);
+ });
+ return mediaGroupPlaylists;
+ };
+ /**
+ * Updates the playlist's media sequence numbers.
+ *
+ * @param {Object} config - options object
+ * @param {Object} config.playlist - the playlist to update
+ * @param {number} config.mediaSequence - the mediaSequence number to start with
+ */
+
+ const updateMediaSequenceForPlaylist = ({
+ playlist,
+ mediaSequence
+ }) => {
+ playlist.mediaSequence = mediaSequence;
+ playlist.segments.forEach((segment, index) => {
+ segment.number = playlist.mediaSequence + index;
+ });
+ };
+ /**
+ * Updates the media and discontinuity sequence numbers of newPlaylists given oldPlaylists
+ * and a complete list of timeline starts.
+ *
+ * If no matching playlist is found, only the discontinuity sequence number of the playlist
+ * will be updated.
+ *
+ * Since early available timelines are not supported, at least one segment must be present.
+ *
+ * @param {Object} config - options object
+ * @param {Object[]} oldPlaylists - the old playlists to use as a reference
+ * @param {Object[]} newPlaylists - the new playlists to update
+ * @param {Object} timelineStarts - all timelineStarts seen in the stream to this point
+ */
+
+ const updateSequenceNumbers = ({
+ oldPlaylists,
+ newPlaylists,
+ timelineStarts
+ }) => {
+ newPlaylists.forEach(playlist => {
+ playlist.discontinuitySequence = timelineStarts.findIndex(function ({
+ timeline
+ }) {
+ return timeline === playlist.timeline;
+ }); // Playlists NAMEs come from DASH Representation IDs, which are mandatory
+ // (see ISO_23009-1-2012 5.3.5.2).
+ //
+ // If the same Representation existed in a prior Period, it will retain the same NAME.
+
+ const oldPlaylist = findPlaylistWithName(oldPlaylists, playlist.attributes.NAME);
+ if (!oldPlaylist) {
+ // Since this is a new playlist, the media sequence values can start from 0 without
+ // consequence.
+ return;
+ } // TODO better support for live SIDX
+ //
+ // As of this writing, mpd-parser does not support multiperiod SIDX (in live or VOD).
+ // This is evident by a playlist only having a single SIDX reference. In a multiperiod
+ // playlist there would need to be multiple SIDX references. In addition, live SIDX is
+ // not supported when the SIDX properties change on refreshes.
+ //
+ // In the future, if support needs to be added, the merging logic here can be called
+ // after SIDX references are resolved. For now, exit early to prevent exceptions being
+ // thrown due to undefined references.
+
+ if (playlist.sidx) {
+ return;
+ } // Since we don't yet support early available timelines, we don't need to support
+ // playlists with no segments.
+
+ const firstNewSegment = playlist.segments[0];
+ const oldMatchingSegmentIndex = oldPlaylist.segments.findIndex(function (oldSegment) {
+ return Math.abs(oldSegment.presentationTime - firstNewSegment.presentationTime) < TIME_FUDGE;
+ }); // No matching segment from the old playlist means the entire playlist was refreshed.
+ // In this case the media sequence should account for this update, and the new segments
+ // should be marked as discontinuous from the prior content, since the last prior
+ // timeline was removed.
+
+ if (oldMatchingSegmentIndex === -1) {
+ updateMediaSequenceForPlaylist({
+ playlist,
+ mediaSequence: oldPlaylist.mediaSequence + oldPlaylist.segments.length
+ });
+ playlist.segments[0].discontinuity = true;
+ playlist.discontinuityStarts.unshift(0); // No matching segment does not necessarily mean there's missing content.
+ //
+ // If the new playlist's timeline is the same as the last seen segment's timeline,
+ // then a discontinuity can be added to identify that there's potentially missing
+ // content. If there's no missing content, the discontinuity should still be rather
+ // harmless. It's possible that if segment durations are accurate enough, that the
+ // existence of a gap can be determined using the presentation times and durations,
+ // but if the segment timing info is off, it may introduce more problems than simply
+ // adding the discontinuity.
+ //
+ // If the new playlist's timeline is different from the last seen segment's timeline,
+ // then a discontinuity can be added to identify that this is the first seen segment
+ // of a new timeline. However, the logic at the start of this function that
+ // determined the disconinuity sequence by timeline index is now off by one (the
+ // discontinuity of the newest timeline hasn't yet fallen off the manifest...since
+ // we added it), so the disconinuity sequence must be decremented.
+ //
+ // A period may also have a duration of zero, so the case of no segments is handled
+ // here even though we don't yet support early available periods.
+
+ if (!oldPlaylist.segments.length && playlist.timeline > oldPlaylist.timeline || oldPlaylist.segments.length && playlist.timeline > oldPlaylist.segments[oldPlaylist.segments.length - 1].timeline) {
+ playlist.discontinuitySequence--;
+ }
+ return;
+ } // If the first segment matched with a prior segment on a discontinuity (it's matching
+ // on the first segment of a period), then the discontinuitySequence shouldn't be the
+ // timeline's matching one, but instead should be the one prior, and the first segment
+ // of the new manifest should be marked with a discontinuity.
+ //
+ // The reason for this special case is that discontinuity sequence shows how many
+ // discontinuities have fallen off of the playlist, and discontinuities are marked on
+ // the first segment of a new "timeline." Because of this, while DASH will retain that
+ // Period while the "timeline" exists, HLS keeps track of it via the discontinuity
+ // sequence, and that first segment is an indicator, but can be removed before that
+ // timeline is gone.
+
+ const oldMatchingSegment = oldPlaylist.segments[oldMatchingSegmentIndex];
+ if (oldMatchingSegment.discontinuity && !firstNewSegment.discontinuity) {
+ firstNewSegment.discontinuity = true;
+ playlist.discontinuityStarts.unshift(0);
+ playlist.discontinuitySequence--;
+ }
+ updateMediaSequenceForPlaylist({
+ playlist,
+ mediaSequence: oldPlaylist.segments[oldMatchingSegmentIndex].number
+ });
+ });
+ };
+ /**
+ * Given an old parsed manifest object and a new parsed manifest object, updates the
+ * sequence and timing values within the new manifest to ensure that it lines up with the
+ * old.
+ *
+ * @param {Array} oldManifest - the old main manifest object
+ * @param {Array} newManifest - the new main manifest object
+ *
+ * @return {Object} the updated new manifest object
+ */
+
+ const positionManifestOnTimeline = ({
+ oldManifest,
+ newManifest
+ }) => {
+ // Starting from v4.1.2 of the IOP, section 4.4.3.3 states:
+ //
+ // "MPD@availabilityStartTime and Period@start shall not be changed over MPD updates."
+ //
+ // This was added from https://github.com/Dash-Industry-Forum/DASH-IF-IOP/issues/160
+ //
+ // Because of this change, and the difficulty of supporting periods with changing start
+ // times, periods with changing start times are not supported. This makes the logic much
+ // simpler, since periods with the same start time can be considerred the same period
+ // across refreshes.
+ //
+ // To give an example as to the difficulty of handling periods where the start time may
+ // change, if a single period manifest is refreshed with another manifest with a single
+ // period, and both the start and end times are increased, then the only way to determine
+ // if it's a new period or an old one that has changed is to look through the segments of
+ // each playlist and determine the presentation time bounds to find a match. In addition,
+ // if the period start changed to exceed the old period end, then there would be no
+ // match, and it would not be possible to determine whether the refreshed period is a new
+ // one or the old one.
+ const oldPlaylists = oldManifest.playlists.concat(getMediaGroupPlaylists(oldManifest));
+ const newPlaylists = newManifest.playlists.concat(getMediaGroupPlaylists(newManifest)); // Save all seen timelineStarts to the new manifest. Although this potentially means that
+ // there's a "memory leak" in that it will never stop growing, in reality, only a couple
+ // of properties are saved for each seen Period. Even long running live streams won't
+ // generate too many Periods, unless the stream is watched for decades. In the future,
+ // this can be optimized by mapping to discontinuity sequence numbers for each timeline,
+ // but it may not become an issue, and the additional info can be useful for debugging.
+
+ newManifest.timelineStarts = getUniqueTimelineStarts([oldManifest.timelineStarts, newManifest.timelineStarts]);
+ updateSequenceNumbers({
+ oldPlaylists,
+ newPlaylists,
+ timelineStarts: newManifest.timelineStarts
+ });
+ return newManifest;
+ };
+ const generateSidxKey = sidx => sidx && sidx.uri + '-' + byteRangeToString(sidx.byterange);
+ const mergeDiscontiguousPlaylists = playlists => {
+ // Break out playlists into groups based on their baseUrl
+ const playlistsByBaseUrl = playlists.reduce(function (acc, cur) {
+ if (!acc[cur.attributes.baseUrl]) {
+ acc[cur.attributes.baseUrl] = [];
+ }
+ acc[cur.attributes.baseUrl].push(cur);
+ return acc;
+ }, {});
+ let allPlaylists = [];
+ Object.values(playlistsByBaseUrl).forEach(playlistGroup => {
+ const mergedPlaylists = values(playlistGroup.reduce((acc, playlist) => {
+ // assuming playlist IDs are the same across periods
+ // TODO: handle multiperiod where representation sets are not the same
+ // across periods
+ const name = playlist.attributes.id + (playlist.attributes.lang || '');
+ if (!acc[name]) {
+ // First Period
+ acc[name] = playlist;
+ acc[name].attributes.timelineStarts = [];
+ } else {
+ // Subsequent Periods
+ if (playlist.segments) {
+ // first segment of subsequent periods signal a discontinuity
+ if (playlist.segments[0]) {
+ playlist.segments[0].discontinuity = true;
+ }
+ acc[name].segments.push(...playlist.segments);
+ } // bubble up contentProtection, this assumes all DRM content
+ // has the same contentProtection
+
+ if (playlist.attributes.contentProtection) {
+ acc[name].attributes.contentProtection = playlist.attributes.contentProtection;
+ }
+ }
+ acc[name].attributes.timelineStarts.push({
+ // Although they represent the same number, it's important to have both to make it
+ // compatible with HLS potentially having a similar attribute.
+ start: playlist.attributes.periodStart,
+ timeline: playlist.attributes.periodStart
+ });
+ return acc;
+ }, {}));
+ allPlaylists = allPlaylists.concat(mergedPlaylists);
+ });
+ return allPlaylists.map(playlist => {
+ playlist.discontinuityStarts = findIndexes(playlist.segments || [], 'discontinuity');
+ return playlist;
+ });
+ };
+ const addSidxSegmentsToPlaylist = (playlist, sidxMapping) => {
+ const sidxKey = generateSidxKey(playlist.sidx);
+ const sidxMatch = sidxKey && sidxMapping[sidxKey] && sidxMapping[sidxKey].sidx;
+ if (sidxMatch) {
+ addSidxSegmentsToPlaylist$1(playlist, sidxMatch, playlist.sidx.resolvedUri);
+ }
+ return playlist;
+ };
+ const addSidxSegmentsToPlaylists = (playlists, sidxMapping = {}) => {
+ if (!Object.keys(sidxMapping).length) {
+ return playlists;
+ }
+ for (const i in playlists) {
+ playlists[i] = addSidxSegmentsToPlaylist(playlists[i], sidxMapping);
+ }
+ return playlists;
+ };
+ const formatAudioPlaylist = ({
+ attributes,
+ segments,
+ sidx,
+ mediaSequence,
+ discontinuitySequence,
+ discontinuityStarts
+ }, isAudioOnly) => {
+ const playlist = {
+ attributes: {
+ NAME: attributes.id,
+ BANDWIDTH: attributes.bandwidth,
+ CODECS: attributes.codecs,
+ ['PROGRAM-ID']: 1
+ },
+ uri: '',
+ endList: attributes.type === 'static',
+ timeline: attributes.periodStart,
+ resolvedUri: attributes.baseUrl || '',
+ targetDuration: attributes.duration,
+ discontinuitySequence,
+ discontinuityStarts,
+ timelineStarts: attributes.timelineStarts,
+ mediaSequence,
+ segments
+ };
+ if (attributes.contentProtection) {
+ playlist.contentProtection = attributes.contentProtection;
+ }
+ if (attributes.serviceLocation) {
+ playlist.attributes.serviceLocation = attributes.serviceLocation;
+ }
+ if (sidx) {
+ playlist.sidx = sidx;
+ }
+ if (isAudioOnly) {
+ playlist.attributes.AUDIO = 'audio';
+ playlist.attributes.SUBTITLES = 'subs';
+ }
+ return playlist;
+ };
+ const formatVttPlaylist = ({
+ attributes,
+ segments,
+ mediaSequence,
+ discontinuityStarts,
+ discontinuitySequence
+ }) => {
+ if (typeof segments === 'undefined') {
+ // vtt tracks may use single file in BaseURL
+ segments = [{
+ uri: attributes.baseUrl,
+ timeline: attributes.periodStart,
+ resolvedUri: attributes.baseUrl || '',
+ duration: attributes.sourceDuration,
+ number: 0
+ }]; // targetDuration should be the same duration as the only segment
+
+ attributes.duration = attributes.sourceDuration;
+ }
+ const m3u8Attributes = {
+ NAME: attributes.id,
+ BANDWIDTH: attributes.bandwidth,
+ ['PROGRAM-ID']: 1
+ };
+ if (attributes.codecs) {
+ m3u8Attributes.CODECS = attributes.codecs;
+ }
+ const vttPlaylist = {
+ attributes: m3u8Attributes,
+ uri: '',
+ endList: attributes.type === 'static',
+ timeline: attributes.periodStart,
+ resolvedUri: attributes.baseUrl || '',
+ targetDuration: attributes.duration,
+ timelineStarts: attributes.timelineStarts,
+ discontinuityStarts,
+ discontinuitySequence,
+ mediaSequence,
+ segments
+ };
+ if (attributes.serviceLocation) {
+ vttPlaylist.attributes.serviceLocation = attributes.serviceLocation;
+ }
+ return vttPlaylist;
+ };
+ const organizeAudioPlaylists = (playlists, sidxMapping = {}, isAudioOnly = false) => {
+ let mainPlaylist;
+ const formattedPlaylists = playlists.reduce((a, playlist) => {
+ const role = playlist.attributes.role && playlist.attributes.role.value || '';
+ const language = playlist.attributes.lang || '';
+ let label = playlist.attributes.label || 'main';
+ if (language && !playlist.attributes.label) {
+ const roleLabel = role ? ` (${role})` : '';
+ label = `${playlist.attributes.lang}${roleLabel}`;
+ }
+ if (!a[label]) {
+ a[label] = {
+ language,
+ autoselect: true,
+ default: role === 'main',
+ playlists: [],
+ uri: ''
+ };
+ }
+ const formatted = addSidxSegmentsToPlaylist(formatAudioPlaylist(playlist, isAudioOnly), sidxMapping);
+ a[label].playlists.push(formatted);
+ if (typeof mainPlaylist === 'undefined' && role === 'main') {
+ mainPlaylist = playlist;
+ mainPlaylist.default = true;
+ }
+ return a;
+ }, {}); // if no playlists have role "main", mark the first as main
+
+ if (!mainPlaylist) {
+ const firstLabel = Object.keys(formattedPlaylists)[0];
+ formattedPlaylists[firstLabel].default = true;
+ }
+ return formattedPlaylists;
+ };
+ const organizeVttPlaylists = (playlists, sidxMapping = {}) => {
+ return playlists.reduce((a, playlist) => {
+ const label = playlist.attributes.label || playlist.attributes.lang || 'text';
+ if (!a[label]) {
+ a[label] = {
+ language: label,
+ default: false,
+ autoselect: false,
+ playlists: [],
+ uri: ''
+ };
+ }
+ a[label].playlists.push(addSidxSegmentsToPlaylist(formatVttPlaylist(playlist), sidxMapping));
+ return a;
+ }, {});
+ };
+ const organizeCaptionServices = captionServices => captionServices.reduce((svcObj, svc) => {
+ if (!svc) {
+ return svcObj;
+ }
+ svc.forEach(service => {
+ const {
+ channel,
+ language
+ } = service;
+ svcObj[language] = {
+ autoselect: false,
+ default: false,
+ instreamId: channel,
+ language
+ };
+ if (service.hasOwnProperty('aspectRatio')) {
+ svcObj[language].aspectRatio = service.aspectRatio;
+ }
+ if (service.hasOwnProperty('easyReader')) {
+ svcObj[language].easyReader = service.easyReader;
+ }
+ if (service.hasOwnProperty('3D')) {
+ svcObj[language]['3D'] = service['3D'];
+ }
+ });
+ return svcObj;
+ }, {});
+ const formatVideoPlaylist = ({
+ attributes,
+ segments,
+ sidx,
+ discontinuityStarts
+ }) => {
+ const playlist = {
+ attributes: {
+ NAME: attributes.id,
+ AUDIO: 'audio',
+ SUBTITLES: 'subs',
+ RESOLUTION: {
+ width: attributes.width,
+ height: attributes.height
+ },
+ CODECS: attributes.codecs,
+ BANDWIDTH: attributes.bandwidth,
+ ['PROGRAM-ID']: 1
+ },
+ uri: '',
+ endList: attributes.type === 'static',
+ timeline: attributes.periodStart,
+ resolvedUri: attributes.baseUrl || '',
+ targetDuration: attributes.duration,
+ discontinuityStarts,
+ timelineStarts: attributes.timelineStarts,
+ segments
+ };
+ if (attributes.frameRate) {
+ playlist.attributes['FRAME-RATE'] = attributes.frameRate;
+ }
+ if (attributes.contentProtection) {
+ playlist.contentProtection = attributes.contentProtection;
+ }
+ if (attributes.serviceLocation) {
+ playlist.attributes.serviceLocation = attributes.serviceLocation;
+ }
+ if (sidx) {
+ playlist.sidx = sidx;
+ }
+ return playlist;
+ };
+ const videoOnly = ({
+ attributes
+ }) => attributes.mimeType === 'video/mp4' || attributes.mimeType === 'video/webm' || attributes.contentType === 'video';
+ const audioOnly = ({
+ attributes
+ }) => attributes.mimeType === 'audio/mp4' || attributes.mimeType === 'audio/webm' || attributes.contentType === 'audio';
+ const vttOnly = ({
+ attributes
+ }) => attributes.mimeType === 'text/vtt' || attributes.contentType === 'text';
+ /**
+ * Contains start and timeline properties denoting a timeline start. For DASH, these will
+ * be the same number.
+ *
+ * @typedef {Object} TimelineStart
+ * @property {number} start - the start time of the timeline
+ * @property {number} timeline - the timeline number
+ */
+
+ /**
+ * Adds appropriate media and discontinuity sequence values to the segments and playlists.
+ *
+ * Throughout mpd-parser, the `number` attribute is used in relation to `startNumber`, a
+ * DASH specific attribute used in constructing segment URI's from templates. However, from
+ * an HLS perspective, the `number` attribute on a segment would be its `mediaSequence`
+ * value, which should start at the original media sequence value (or 0) and increment by 1
+ * for each segment thereafter. Since DASH's `startNumber` values are independent per
+ * period, it doesn't make sense to use it for `number`. Instead, assume everything starts
+ * from a 0 mediaSequence value and increment from there.
+ *
+ * Note that VHS currently doesn't use the `number` property, but it can be helpful for
+ * debugging and making sense of the manifest.
+ *
+ * For live playlists, to account for values increasing in manifests when periods are
+ * removed on refreshes, merging logic should be used to update the numbers to their
+ * appropriate values (to ensure they're sequential and increasing).
+ *
+ * @param {Object[]} playlists - the playlists to update
+ * @param {TimelineStart[]} timelineStarts - the timeline starts for the manifest
+ */
+
+ const addMediaSequenceValues = (playlists, timelineStarts) => {
+ // increment all segments sequentially
+ playlists.forEach(playlist => {
+ playlist.mediaSequence = 0;
+ playlist.discontinuitySequence = timelineStarts.findIndex(function ({
+ timeline
+ }) {
+ return timeline === playlist.timeline;
+ });
+ if (!playlist.segments) {
+ return;
+ }
+ playlist.segments.forEach((segment, index) => {
+ segment.number = index;
+ });
+ });
+ };
+ /**
+ * Given a media group object, flattens all playlists within the media group into a single
+ * array.
+ *
+ * @param {Object} mediaGroupObject - the media group object
+ *
+ * @return {Object[]}
+ * The media group playlists
+ */
+
+ const flattenMediaGroupPlaylists = mediaGroupObject => {
+ if (!mediaGroupObject) {
+ return [];
+ }
+ return Object.keys(mediaGroupObject).reduce((acc, label) => {
+ const labelContents = mediaGroupObject[label];
+ return acc.concat(labelContents.playlists);
+ }, []);
+ };
+ const toM3u8 = ({
+ dashPlaylists,
+ locations,
+ contentSteering,
+ sidxMapping = {},
+ previousManifest,
+ eventStream
+ }) => {
+ if (!dashPlaylists.length) {
+ return {};
+ } // grab all main manifest attributes
+
+ const {
+ sourceDuration: duration,
+ type,
+ suggestedPresentationDelay,
+ minimumUpdatePeriod
+ } = dashPlaylists[0].attributes;
+ const videoPlaylists = mergeDiscontiguousPlaylists(dashPlaylists.filter(videoOnly)).map(formatVideoPlaylist);
+ const audioPlaylists = mergeDiscontiguousPlaylists(dashPlaylists.filter(audioOnly));
+ const vttPlaylists = mergeDiscontiguousPlaylists(dashPlaylists.filter(vttOnly));
+ const captions = dashPlaylists.map(playlist => playlist.attributes.captionServices).filter(Boolean);
+ const manifest = {
+ allowCache: true,
+ discontinuityStarts: [],
+ segments: [],
+ endList: true,
+ mediaGroups: {
+ AUDIO: {},
+ VIDEO: {},
+ ['CLOSED-CAPTIONS']: {},
+ SUBTITLES: {}
+ },
+ uri: '',
+ duration,
+ playlists: addSidxSegmentsToPlaylists(videoPlaylists, sidxMapping)
+ };
+ if (minimumUpdatePeriod >= 0) {
+ manifest.minimumUpdatePeriod = minimumUpdatePeriod * 1000;
+ }
+ if (locations) {
+ manifest.locations = locations;
+ }
+ if (contentSteering) {
+ manifest.contentSteering = contentSteering;
+ }
+ if (type === 'dynamic') {
+ manifest.suggestedPresentationDelay = suggestedPresentationDelay;
+ }
+ if (eventStream && eventStream.length > 0) {
+ manifest.eventStream = eventStream;
+ }
+ const isAudioOnly = manifest.playlists.length === 0;
+ const organizedAudioGroup = audioPlaylists.length ? organizeAudioPlaylists(audioPlaylists, sidxMapping, isAudioOnly) : null;
+ const organizedVttGroup = vttPlaylists.length ? organizeVttPlaylists(vttPlaylists, sidxMapping) : null;
+ const formattedPlaylists = videoPlaylists.concat(flattenMediaGroupPlaylists(organizedAudioGroup), flattenMediaGroupPlaylists(organizedVttGroup));
+ const playlistTimelineStarts = formattedPlaylists.map(({
+ timelineStarts
+ }) => timelineStarts);
+ manifest.timelineStarts = getUniqueTimelineStarts(playlistTimelineStarts);
+ addMediaSequenceValues(formattedPlaylists, manifest.timelineStarts);
+ if (organizedAudioGroup) {
+ manifest.mediaGroups.AUDIO.audio = organizedAudioGroup;
+ }
+ if (organizedVttGroup) {
+ manifest.mediaGroups.SUBTITLES.subs = organizedVttGroup;
+ }
+ if (captions.length) {
+ manifest.mediaGroups['CLOSED-CAPTIONS'].cc = organizeCaptionServices(captions);
+ }
+ if (previousManifest) {
+ return positionManifestOnTimeline({
+ oldManifest: previousManifest,
+ newManifest: manifest
+ });
+ }
+ return manifest;
+ };
+
+ /**
+ * Calculates the R (repetition) value for a live stream (for the final segment
+ * in a manifest where the r value is negative 1)
+ *
+ * @param {Object} attributes
+ * Object containing all inherited attributes from parent elements with attribute
+ * names as keys
+ * @param {number} time
+ * current time (typically the total time up until the final segment)
+ * @param {number} duration
+ * duration property for the given <S />
+ *
+ * @return {number}
+ * R value to reach the end of the given period
+ */
+ const getLiveRValue = (attributes, time, duration) => {
+ const {
+ NOW,
+ clientOffset,
+ availabilityStartTime,
+ timescale = 1,
+ periodStart = 0,
+ minimumUpdatePeriod = 0
+ } = attributes;
+ const now = (NOW + clientOffset) / 1000;
+ const periodStartWC = availabilityStartTime + periodStart;
+ const periodEndWC = now + minimumUpdatePeriod;
+ const periodDuration = periodEndWC - periodStartWC;
+ return Math.ceil((periodDuration * timescale - time) / duration);
+ };
+ /**
+ * Uses information provided by SegmentTemplate.SegmentTimeline to determine segment
+ * timing and duration
+ *
+ * @param {Object} attributes
+ * Object containing all inherited attributes from parent elements with attribute
+ * names as keys
+ * @param {Object[]} segmentTimeline
+ * List of objects representing the attributes of each S element contained within
+ *
+ * @return {{number: number, duration: number, time: number, timeline: number}[]}
+ * List of Objects with segment timing and duration info
+ */
+
+ const parseByTimeline = (attributes, segmentTimeline) => {
+ const {
+ type,
+ minimumUpdatePeriod = 0,
+ media = '',
+ sourceDuration,
+ timescale = 1,
+ startNumber = 1,
+ periodStart: timeline
+ } = attributes;
+ const segments = [];
+ let time = -1;
+ for (let sIndex = 0; sIndex < segmentTimeline.length; sIndex++) {
+ const S = segmentTimeline[sIndex];
+ const duration = S.d;
+ const repeat = S.r || 0;
+ const segmentTime = S.t || 0;
+ if (time < 0) {
+ // first segment
+ time = segmentTime;
+ }
+ if (segmentTime && segmentTime > time) {
+ // discontinuity
+ // TODO: How to handle this type of discontinuity
+ // timeline++ here would treat it like HLS discontuity and content would
+ // get appended without gap
+ // E.G.
+ // <S t="0" d="1" />
+ // <S d="1" />
+ // <S d="1" />
+ // <S t="5" d="1" />
+ // would have $Time$ values of [0, 1, 2, 5]
+ // should this be appened at time positions [0, 1, 2, 3],(#EXT-X-DISCONTINUITY)
+ // or [0, 1, 2, gap, gap, 5]? (#EXT-X-GAP)
+ // does the value of sourceDuration consider this when calculating arbitrary
+ // negative @r repeat value?
+ // E.G. Same elements as above with this added at the end
+ // <S d="1" r="-1" />
+ // with a sourceDuration of 10
+ // Would the 2 gaps be included in the time duration calculations resulting in
+ // 8 segments with $Time$ values of [0, 1, 2, 5, 6, 7, 8, 9] or 10 segments
+ // with $Time$ values of [0, 1, 2, 5, 6, 7, 8, 9, 10, 11] ?
+ time = segmentTime;
+ }
+ let count;
+ if (repeat < 0) {
+ const nextS = sIndex + 1;
+ if (nextS === segmentTimeline.length) {
+ // last segment
+ if (type === 'dynamic' && minimumUpdatePeriod > 0 && media.indexOf('$Number$') > 0) {
+ count = getLiveRValue(attributes, time, duration);
+ } else {
+ // TODO: This may be incorrect depending on conclusion of TODO above
+ count = (sourceDuration * timescale - time) / duration;
+ }
+ } else {
+ count = (segmentTimeline[nextS].t - time) / duration;
+ }
+ } else {
+ count = repeat + 1;
+ }
+ const end = startNumber + segments.length + count;
+ let number = startNumber + segments.length;
+ while (number < end) {
+ segments.push({
+ number,
+ duration: duration / timescale,
+ time,
+ timeline
+ });
+ time += duration;
+ number++;
+ }
+ }
+ return segments;
+ };
+ const identifierPattern = /\$([A-z]*)(?:(%0)([0-9]+)d)?\$/g;
+ /**
+ * Replaces template identifiers with corresponding values. To be used as the callback
+ * for String.prototype.replace
+ *
+ * @name replaceCallback
+ * @function
+ * @param {string} match
+ * Entire match of identifier
+ * @param {string} identifier
+ * Name of matched identifier
+ * @param {string} format
+ * Format tag string. Its presence indicates that padding is expected
+ * @param {string} width
+ * Desired length of the replaced value. Values less than this width shall be left
+ * zero padded
+ * @return {string}
+ * Replacement for the matched identifier
+ */
+
+ /**
+ * Returns a function to be used as a callback for String.prototype.replace to replace
+ * template identifiers
+ *
+ * @param {Obect} values
+ * Object containing values that shall be used to replace known identifiers
+ * @param {number} values.RepresentationID
+ * Value of the Representation@id attribute
+ * @param {number} values.Number
+ * Number of the corresponding segment
+ * @param {number} values.Bandwidth
+ * Value of the Representation@bandwidth attribute.
+ * @param {number} values.Time
+ * Timestamp value of the corresponding segment
+ * @return {replaceCallback}
+ * Callback to be used with String.prototype.replace to replace identifiers
+ */
+
+ const identifierReplacement = values => (match, identifier, format, width) => {
+ if (match === '$$') {
+ // escape sequence
+ return '$';
+ }
+ if (typeof values[identifier] === 'undefined') {
+ return match;
+ }
+ const value = '' + values[identifier];
+ if (identifier === 'RepresentationID') {
+ // Format tag shall not be present with RepresentationID
+ return value;
+ }
+ if (!format) {
+ width = 1;
+ } else {
+ width = parseInt(width, 10);
+ }
+ if (value.length >= width) {
+ return value;
+ }
+ return `${new Array(width - value.length + 1).join('0')}${value}`;
+ };
+ /**
+ * Constructs a segment url from a template string
+ *
+ * @param {string} url
+ * Template string to construct url from
+ * @param {Obect} values
+ * Object containing values that shall be used to replace known identifiers
+ * @param {number} values.RepresentationID
+ * Value of the Representation@id attribute
+ * @param {number} values.Number
+ * Number of the corresponding segment
+ * @param {number} values.Bandwidth
+ * Value of the Representation@bandwidth attribute.
+ * @param {number} values.Time
+ * Timestamp value of the corresponding segment
+ * @return {string}
+ * Segment url with identifiers replaced
+ */
+
+ const constructTemplateUrl = (url, values) => url.replace(identifierPattern, identifierReplacement(values));
+ /**
+ * Generates a list of objects containing timing and duration information about each
+ * segment needed to generate segment uris and the complete segment object
+ *
+ * @param {Object} attributes
+ * Object containing all inherited attributes from parent elements with attribute
+ * names as keys
+ * @param {Object[]|undefined} segmentTimeline
+ * List of objects representing the attributes of each S element contained within
+ * the SegmentTimeline element
+ * @return {{number: number, duration: number, time: number, timeline: number}[]}
+ * List of Objects with segment timing and duration info
+ */
+
+ const parseTemplateInfo = (attributes, segmentTimeline) => {
+ if (!attributes.duration && !segmentTimeline) {
+ // if neither @duration or SegmentTimeline are present, then there shall be exactly
+ // one media segment
+ return [{
+ number: attributes.startNumber || 1,
+ duration: attributes.sourceDuration,
+ time: 0,
+ timeline: attributes.periodStart
+ }];
+ }
+ if (attributes.duration) {
+ return parseByDuration(attributes);
+ }
+ return parseByTimeline(attributes, segmentTimeline);
+ };
+ /**
+ * Generates a list of segments using information provided by the SegmentTemplate element
+ *
+ * @param {Object} attributes
+ * Object containing all inherited attributes from parent elements with attribute
+ * names as keys
+ * @param {Object[]|undefined} segmentTimeline
+ * List of objects representing the attributes of each S element contained within
+ * the SegmentTimeline element
+ * @return {Object[]}
+ * List of segment objects
+ */
+
+ const segmentsFromTemplate = (attributes, segmentTimeline) => {
+ const templateValues = {
+ RepresentationID: attributes.id,
+ Bandwidth: attributes.bandwidth || 0
+ };
+ const {
+ initialization = {
+ sourceURL: '',
+ range: ''
+ }
+ } = attributes;
+ const mapSegment = urlTypeToSegment({
+ baseUrl: attributes.baseUrl,
+ source: constructTemplateUrl(initialization.sourceURL, templateValues),
+ range: initialization.range
+ });
+ const segments = parseTemplateInfo(attributes, segmentTimeline);
+ return segments.map(segment => {
+ templateValues.Number = segment.number;
+ templateValues.Time = segment.time;
+ const uri = constructTemplateUrl(attributes.media || '', templateValues); // See DASH spec section 5.3.9.2.2
+ // - if timescale isn't present on any level, default to 1.
+
+ const timescale = attributes.timescale || 1; // - if presentationTimeOffset isn't present on any level, default to 0
+
+ const presentationTimeOffset = attributes.presentationTimeOffset || 0;
+ const presentationTime =
+ // Even if the @t attribute is not specified for the segment, segment.time is
+ // calculated in mpd-parser prior to this, so it's assumed to be available.
+ attributes.periodStart + (segment.time - presentationTimeOffset) / timescale;
+ const map = {
+ uri,
+ timeline: segment.timeline,
+ duration: segment.duration,
+ resolvedUri: resolveUrl$1(attributes.baseUrl || '', uri),
+ map: mapSegment,
+ number: segment.number,
+ presentationTime
+ };
+ return map;
+ });
+ };
+
+ /**
+ * Converts a <SegmentUrl> (of type URLType from the DASH spec 5.3.9.2 Table 14)
+ * to an object that matches the output of a segment in videojs/mpd-parser
+ *
+ * @param {Object} attributes
+ * Object containing all inherited attributes from parent elements with attribute
+ * names as keys
+ * @param {Object} segmentUrl
+ * <SegmentURL> node to translate into a segment object
+ * @return {Object} translated segment object
+ */
+
+ const SegmentURLToSegmentObject = (attributes, segmentUrl) => {
+ const {
+ baseUrl,
+ initialization = {}
+ } = attributes;
+ const initSegment = urlTypeToSegment({
+ baseUrl,
+ source: initialization.sourceURL,
+ range: initialization.range
+ });
+ const segment = urlTypeToSegment({
+ baseUrl,
+ source: segmentUrl.media,
+ range: segmentUrl.mediaRange
+ });
+ segment.map = initSegment;
+ return segment;
+ };
+ /**
+ * Generates a list of segments using information provided by the SegmentList element
+ * SegmentList (DASH SPEC Section 5.3.9.3.2) contains a set of <SegmentURL> nodes. Each
+ * node should be translated into segment.
+ *
+ * @param {Object} attributes
+ * Object containing all inherited attributes from parent elements with attribute
+ * names as keys
+ * @param {Object[]|undefined} segmentTimeline
+ * List of objects representing the attributes of each S element contained within
+ * the SegmentTimeline element
+ * @return {Object.<Array>} list of segments
+ */
+
+ const segmentsFromList = (attributes, segmentTimeline) => {
+ const {
+ duration,
+ segmentUrls = [],
+ periodStart
+ } = attributes; // Per spec (5.3.9.2.1) no way to determine segment duration OR
+ // if both SegmentTimeline and @duration are defined, it is outside of spec.
+
+ if (!duration && !segmentTimeline || duration && segmentTimeline) {
+ throw new Error(errors.SEGMENT_TIME_UNSPECIFIED);
+ }
+ const segmentUrlMap = segmentUrls.map(segmentUrlObject => SegmentURLToSegmentObject(attributes, segmentUrlObject));
+ let segmentTimeInfo;
+ if (duration) {
+ segmentTimeInfo = parseByDuration(attributes);
+ }
+ if (segmentTimeline) {
+ segmentTimeInfo = parseByTimeline(attributes, segmentTimeline);
+ }
+ const segments = segmentTimeInfo.map((segmentTime, index) => {
+ if (segmentUrlMap[index]) {
+ const segment = segmentUrlMap[index]; // See DASH spec section 5.3.9.2.2
+ // - if timescale isn't present on any level, default to 1.
+
+ const timescale = attributes.timescale || 1; // - if presentationTimeOffset isn't present on any level, default to 0
+
+ const presentationTimeOffset = attributes.presentationTimeOffset || 0;
+ segment.timeline = segmentTime.timeline;
+ segment.duration = segmentTime.duration;
+ segment.number = segmentTime.number;
+ segment.presentationTime = periodStart + (segmentTime.time - presentationTimeOffset) / timescale;
+ return segment;
+ } // Since we're mapping we should get rid of any blank segments (in case
+ // the given SegmentTimeline is handling for more elements than we have
+ // SegmentURLs for).
+ }).filter(segment => segment);
+ return segments;
+ };
+ const generateSegments = ({
+ attributes,
+ segmentInfo
+ }) => {
+ let segmentAttributes;
+ let segmentsFn;
+ if (segmentInfo.template) {
+ segmentsFn = segmentsFromTemplate;
+ segmentAttributes = merge$1(attributes, segmentInfo.template);
+ } else if (segmentInfo.base) {
+ segmentsFn = segmentsFromBase;
+ segmentAttributes = merge$1(attributes, segmentInfo.base);
+ } else if (segmentInfo.list) {
+ segmentsFn = segmentsFromList;
+ segmentAttributes = merge$1(attributes, segmentInfo.list);
+ }
+ const segmentsInfo = {
+ attributes
+ };
+ if (!segmentsFn) {
+ return segmentsInfo;
+ }
+ const segments = segmentsFn(segmentAttributes, segmentInfo.segmentTimeline); // The @duration attribute will be used to determin the playlist's targetDuration which
+ // must be in seconds. Since we've generated the segment list, we no longer need
+ // @duration to be in @timescale units, so we can convert it here.
+
+ if (segmentAttributes.duration) {
+ const {
+ duration,
+ timescale = 1
+ } = segmentAttributes;
+ segmentAttributes.duration = duration / timescale;
+ } else if (segments.length) {
+ // if there is no @duration attribute, use the largest segment duration as
+ // as target duration
+ segmentAttributes.duration = segments.reduce((max, segment) => {
+ return Math.max(max, Math.ceil(segment.duration));
+ }, 0);
+ } else {
+ segmentAttributes.duration = 0;
+ }
+ segmentsInfo.attributes = segmentAttributes;
+ segmentsInfo.segments = segments; // This is a sidx box without actual segment information
+
+ if (segmentInfo.base && segmentAttributes.indexRange) {
+ segmentsInfo.sidx = segments[0];
+ segmentsInfo.segments = [];
+ }
+ return segmentsInfo;
+ };
+ const toPlaylists = representations => representations.map(generateSegments);
+ const findChildren = (element, name) => from(element.childNodes).filter(({
+ tagName
+ }) => tagName === name);
+ const getContent = element => element.textContent.trim();
+
+ /**
+ * Converts the provided string that may contain a division operation to a number.
+ *
+ * @param {string} value - the provided string value
+ *
+ * @return {number} the parsed string value
+ */
+ const parseDivisionValue = value => {
+ return parseFloat(value.split('/').reduce((prev, current) => prev / current));
+ };
+ const parseDuration = str => {
+ const SECONDS_IN_YEAR = 365 * 24 * 60 * 60;
+ const SECONDS_IN_MONTH = 30 * 24 * 60 * 60;
+ const SECONDS_IN_DAY = 24 * 60 * 60;
+ const SECONDS_IN_HOUR = 60 * 60;
+ const SECONDS_IN_MIN = 60; // P10Y10M10DT10H10M10.1S
+
+ const durationRegex = /P(?:(\d*)Y)?(?:(\d*)M)?(?:(\d*)D)?(?:T(?:(\d*)H)?(?:(\d*)M)?(?:([\d.]*)S)?)?/;
+ const match = durationRegex.exec(str);
+ if (!match) {
+ return 0;
+ }
+ const [year, month, day, hour, minute, second] = match.slice(1);
+ return parseFloat(year || 0) * SECONDS_IN_YEAR + parseFloat(month || 0) * SECONDS_IN_MONTH + parseFloat(day || 0) * SECONDS_IN_DAY + parseFloat(hour || 0) * SECONDS_IN_HOUR + parseFloat(minute || 0) * SECONDS_IN_MIN + parseFloat(second || 0);
+ };
+ const parseDate = str => {
+ // Date format without timezone according to ISO 8601
+ // YYY-MM-DDThh:mm:ss.ssssss
+ const dateRegex = /^\d+-\d+-\d+T\d+:\d+:\d+(\.\d+)?$/; // If the date string does not specifiy a timezone, we must specifiy UTC. This is
+ // expressed by ending with 'Z'
+
+ if (dateRegex.test(str)) {
+ str += 'Z';
+ }
+ return Date.parse(str);
+ };
+ const parsers = {
+ /**
+ * Specifies the duration of the entire Media Presentation. Format is a duration string
+ * as specified in ISO 8601
+ *
+ * @param {string} value
+ * value of attribute as a string
+ * @return {number}
+ * The duration in seconds
+ */
+ mediaPresentationDuration(value) {
+ return parseDuration(value);
+ },
+ /**
+ * Specifies the Segment availability start time for all Segments referred to in this
+ * MPD. For a dynamic manifest, it specifies the anchor for the earliest availability
+ * time. Format is a date string as specified in ISO 8601
+ *
+ * @param {string} value
+ * value of attribute as a string
+ * @return {number}
+ * The date as seconds from unix epoch
+ */
+ availabilityStartTime(value) {
+ return parseDate(value) / 1000;
+ },
+ /**
+ * Specifies the smallest period between potential changes to the MPD. Format is a
+ * duration string as specified in ISO 8601
+ *
+ * @param {string} value
+ * value of attribute as a string
+ * @return {number}
+ * The duration in seconds
+ */
+ minimumUpdatePeriod(value) {
+ return parseDuration(value);
+ },
+ /**
+ * Specifies the suggested presentation delay. Format is a
+ * duration string as specified in ISO 8601
+ *
+ * @param {string} value
+ * value of attribute as a string
+ * @return {number}
+ * The duration in seconds
+ */
+ suggestedPresentationDelay(value) {
+ return parseDuration(value);
+ },
+ /**
+ * specifices the type of mpd. Can be either "static" or "dynamic"
+ *
+ * @param {string} value
+ * value of attribute as a string
+ *
+ * @return {string}
+ * The type as a string
+ */
+ type(value) {
+ return value;
+ },
+ /**
+ * Specifies the duration of the smallest time shifting buffer for any Representation
+ * in the MPD. Format is a duration string as specified in ISO 8601
+ *
+ * @param {string} value
+ * value of attribute as a string
+ * @return {number}
+ * The duration in seconds
+ */
+ timeShiftBufferDepth(value) {
+ return parseDuration(value);
+ },
+ /**
+ * Specifies the PeriodStart time of the Period relative to the availabilityStarttime.
+ * Format is a duration string as specified in ISO 8601
+ *
+ * @param {string} value
+ * value of attribute as a string
+ * @return {number}
+ * The duration in seconds
+ */
+ start(value) {
+ return parseDuration(value);
+ },
+ /**
+ * Specifies the width of the visual presentation
+ *
+ * @param {string} value
+ * value of attribute as a string
+ * @return {number}
+ * The parsed width
+ */
+ width(value) {
+ return parseInt(value, 10);
+ },
+ /**
+ * Specifies the height of the visual presentation
+ *
+ * @param {string} value
+ * value of attribute as a string
+ * @return {number}
+ * The parsed height
+ */
+ height(value) {
+ return parseInt(value, 10);
+ },
+ /**
+ * Specifies the bitrate of the representation
+ *
+ * @param {string} value
+ * value of attribute as a string
+ * @return {number}
+ * The parsed bandwidth
+ */
+ bandwidth(value) {
+ return parseInt(value, 10);
+ },
+ /**
+ * Specifies the frame rate of the representation
+ *
+ * @param {string} value
+ * value of attribute as a string
+ * @return {number}
+ * The parsed frame rate
+ */
+ frameRate(value) {
+ return parseDivisionValue(value);
+ },
+ /**
+ * Specifies the number of the first Media Segment in this Representation in the Period
+ *
+ * @param {string} value
+ * value of attribute as a string
+ * @return {number}
+ * The parsed number
+ */
+ startNumber(value) {
+ return parseInt(value, 10);
+ },
+ /**
+ * Specifies the timescale in units per seconds
+ *
+ * @param {string} value
+ * value of attribute as a string
+ * @return {number}
+ * The parsed timescale
+ */
+ timescale(value) {
+ return parseInt(value, 10);
+ },
+ /**
+ * Specifies the presentationTimeOffset.
+ *
+ * @param {string} value
+ * value of the attribute as a string
+ *
+ * @return {number}
+ * The parsed presentationTimeOffset
+ */
+ presentationTimeOffset(value) {
+ return parseInt(value, 10);
+ },
+ /**
+ * Specifies the constant approximate Segment duration
+ * NOTE: The <Period> element also contains an @duration attribute. This duration
+ * specifies the duration of the Period. This attribute is currently not
+ * supported by the rest of the parser, however we still check for it to prevent
+ * errors.
+ *
+ * @param {string} value
+ * value of attribute as a string
+ * @return {number}
+ * The parsed duration
+ */
+ duration(value) {
+ const parsedValue = parseInt(value, 10);
+ if (isNaN(parsedValue)) {
+ return parseDuration(value);
+ }
+ return parsedValue;
+ },
+ /**
+ * Specifies the Segment duration, in units of the value of the @timescale.
+ *
+ * @param {string} value
+ * value of attribute as a string
+ * @return {number}
+ * The parsed duration
+ */
+ d(value) {
+ return parseInt(value, 10);
+ },
+ /**
+ * Specifies the MPD start time, in @timescale units, the first Segment in the series
+ * starts relative to the beginning of the Period
+ *
+ * @param {string} value
+ * value of attribute as a string
+ * @return {number}
+ * The parsed time
+ */
+ t(value) {
+ return parseInt(value, 10);
+ },
+ /**
+ * Specifies the repeat count of the number of following contiguous Segments with the
+ * same duration expressed by the value of @d
+ *
+ * @param {string} value
+ * value of attribute as a string
+ * @return {number}
+ * The parsed number
+ */
+ r(value) {
+ return parseInt(value, 10);
+ },
+ /**
+ * Specifies the presentationTime.
+ *
+ * @param {string} value
+ * value of the attribute as a string
+ *
+ * @return {number}
+ * The parsed presentationTime
+ */
+ presentationTime(value) {
+ return parseInt(value, 10);
+ },
+ /**
+ * Default parser for all other attributes. Acts as a no-op and just returns the value
+ * as a string
+ *
+ * @param {string} value
+ * value of attribute as a string
+ * @return {string}
+ * Unparsed value
+ */
+ DEFAULT(value) {
+ return value;
+ }
+ };
+ /**
+ * Gets all the attributes and values of the provided node, parses attributes with known
+ * types, and returns an object with attribute names mapped to values.
+ *
+ * @param {Node} el
+ * The node to parse attributes from
+ * @return {Object}
+ * Object with all attributes of el parsed
+ */
+
+ const parseAttributes = el => {
+ if (!(el && el.attributes)) {
+ return {};
+ }
+ return from(el.attributes).reduce((a, e) => {
+ const parseFn = parsers[e.name] || parsers.DEFAULT;
+ a[e.name] = parseFn(e.value);
+ return a;
+ }, {});
+ };
+ const keySystemsMap = {
+ 'urn:uuid:1077efec-c0b2-4d02-ace3-3c1e52e2fb4b': 'org.w3.clearkey',
+ 'urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed': 'com.widevine.alpha',
+ 'urn:uuid:9a04f079-9840-4286-ab92-e65be0885f95': 'com.microsoft.playready',
+ 'urn:uuid:f239e769-efa3-4850-9c16-a903c6932efb': 'com.adobe.primetime',
+ // ISO_IEC 23009-1_2022 5.8.5.2.2 The mp4 Protection Scheme
+ 'urn:mpeg:dash:mp4protection:2011': 'mp4protection'
+ };
+ /**
+ * Builds a list of urls that is the product of the reference urls and BaseURL values
+ *
+ * @param {Object[]} references
+ * List of objects containing the reference URL as well as its attributes
+ * @param {Node[]} baseUrlElements
+ * List of BaseURL nodes from the mpd
+ * @return {Object[]}
+ * List of objects with resolved urls and attributes
+ */
+
+ const buildBaseUrls = (references, baseUrlElements) => {
+ if (!baseUrlElements.length) {
+ return references;
+ }
+ return flatten(references.map(function (reference) {
+ return baseUrlElements.map(function (baseUrlElement) {
+ const initialBaseUrl = getContent(baseUrlElement);
+ const resolvedBaseUrl = resolveUrl$1(reference.baseUrl, initialBaseUrl);
+ const finalBaseUrl = merge$1(parseAttributes(baseUrlElement), {
+ baseUrl: resolvedBaseUrl
+ }); // If the URL is resolved, we want to get the serviceLocation from the reference
+ // assuming there is no serviceLocation on the initialBaseUrl
+
+ if (resolvedBaseUrl !== initialBaseUrl && !finalBaseUrl.serviceLocation && reference.serviceLocation) {
+ finalBaseUrl.serviceLocation = reference.serviceLocation;
+ }
+ return finalBaseUrl;
+ });
+ }));
+ };
+ /**
+ * Contains all Segment information for its containing AdaptationSet
+ *
+ * @typedef {Object} SegmentInformation
+ * @property {Object|undefined} template
+ * Contains the attributes for the SegmentTemplate node
+ * @property {Object[]|undefined} segmentTimeline
+ * Contains a list of atrributes for each S node within the SegmentTimeline node
+ * @property {Object|undefined} list
+ * Contains the attributes for the SegmentList node
+ * @property {Object|undefined} base
+ * Contains the attributes for the SegmentBase node
+ */
+
+ /**
+ * Returns all available Segment information contained within the AdaptationSet node
+ *
+ * @param {Node} adaptationSet
+ * The AdaptationSet node to get Segment information from
+ * @return {SegmentInformation}
+ * The Segment information contained within the provided AdaptationSet
+ */
+
+ const getSegmentInformation = adaptationSet => {
+ const segmentTemplate = findChildren(adaptationSet, 'SegmentTemplate')[0];
+ const segmentList = findChildren(adaptationSet, 'SegmentList')[0];
+ const segmentUrls = segmentList && findChildren(segmentList, 'SegmentURL').map(s => merge$1({
+ tag: 'SegmentURL'
+ }, parseAttributes(s)));
+ const segmentBase = findChildren(adaptationSet, 'SegmentBase')[0];
+ const segmentTimelineParentNode = segmentList || segmentTemplate;
+ const segmentTimeline = segmentTimelineParentNode && findChildren(segmentTimelineParentNode, 'SegmentTimeline')[0];
+ const segmentInitializationParentNode = segmentList || segmentBase || segmentTemplate;
+ const segmentInitialization = segmentInitializationParentNode && findChildren(segmentInitializationParentNode, 'Initialization')[0]; // SegmentTemplate is handled slightly differently, since it can have both
+ // @initialization and an <Initialization> node. @initialization can be templated,
+ // while the node can have a url and range specified. If the <SegmentTemplate> has
+ // both @initialization and an <Initialization> subelement we opt to override with
+ // the node, as this interaction is not defined in the spec.
+
+ const template = segmentTemplate && parseAttributes(segmentTemplate);
+ if (template && segmentInitialization) {
+ template.initialization = segmentInitialization && parseAttributes(segmentInitialization);
+ } else if (template && template.initialization) {
+ // If it is @initialization we convert it to an object since this is the format that
+ // later functions will rely on for the initialization segment. This is only valid
+ // for <SegmentTemplate>
+ template.initialization = {
+ sourceURL: template.initialization
+ };
+ }
+ const segmentInfo = {
+ template,
+ segmentTimeline: segmentTimeline && findChildren(segmentTimeline, 'S').map(s => parseAttributes(s)),
+ list: segmentList && merge$1(parseAttributes(segmentList), {
+ segmentUrls,
+ initialization: parseAttributes(segmentInitialization)
+ }),
+ base: segmentBase && merge$1(parseAttributes(segmentBase), {
+ initialization: parseAttributes(segmentInitialization)
+ })
+ };
+ Object.keys(segmentInfo).forEach(key => {
+ if (!segmentInfo[key]) {
+ delete segmentInfo[key];
+ }
+ });
+ return segmentInfo;
+ };
+ /**
+ * Contains Segment information and attributes needed to construct a Playlist object
+ * from a Representation
+ *
+ * @typedef {Object} RepresentationInformation
+ * @property {SegmentInformation} segmentInfo
+ * Segment information for this Representation
+ * @property {Object} attributes
+ * Inherited attributes for this Representation
+ */
+
+ /**
+ * Maps a Representation node to an object containing Segment information and attributes
+ *
+ * @name inheritBaseUrlsCallback
+ * @function
+ * @param {Node} representation
+ * Representation node from the mpd
+ * @return {RepresentationInformation}
+ * Representation information needed to construct a Playlist object
+ */
+
+ /**
+ * Returns a callback for Array.prototype.map for mapping Representation nodes to
+ * Segment information and attributes using inherited BaseURL nodes.
+ *
+ * @param {Object} adaptationSetAttributes
+ * Contains attributes inherited by the AdaptationSet
+ * @param {Object[]} adaptationSetBaseUrls
+ * List of objects containing resolved base URLs and attributes
+ * inherited by the AdaptationSet
+ * @param {SegmentInformation} adaptationSetSegmentInfo
+ * Contains Segment information for the AdaptationSet
+ * @return {inheritBaseUrlsCallback}
+ * Callback map function
+ */
+
+ const inheritBaseUrls = (adaptationSetAttributes, adaptationSetBaseUrls, adaptationSetSegmentInfo) => representation => {
+ const repBaseUrlElements = findChildren(representation, 'BaseURL');
+ const repBaseUrls = buildBaseUrls(adaptationSetBaseUrls, repBaseUrlElements);
+ const attributes = merge$1(adaptationSetAttributes, parseAttributes(representation));
+ const representationSegmentInfo = getSegmentInformation(representation);
+ return repBaseUrls.map(baseUrl => {
+ return {
+ segmentInfo: merge$1(adaptationSetSegmentInfo, representationSegmentInfo),
+ attributes: merge$1(attributes, baseUrl)
+ };
+ });
+ };
+ /**
+ * Tranforms a series of content protection nodes to
+ * an object containing pssh data by key system
+ *
+ * @param {Node[]} contentProtectionNodes
+ * Content protection nodes
+ * @return {Object}
+ * Object containing pssh data by key system
+ */
+
+ const generateKeySystemInformation = contentProtectionNodes => {
+ return contentProtectionNodes.reduce((acc, node) => {
+ const attributes = parseAttributes(node); // Although it could be argued that according to the UUID RFC spec the UUID string (a-f chars) should be generated
+ // as a lowercase string it also mentions it should be treated as case-insensitive on input. Since the key system
+ // UUIDs in the keySystemsMap are hardcoded as lowercase in the codebase there isn't any reason not to do
+ // .toLowerCase() on the input UUID string from the manifest (at least I could not think of one).
+
+ if (attributes.schemeIdUri) {
+ attributes.schemeIdUri = attributes.schemeIdUri.toLowerCase();
+ }
+ const keySystem = keySystemsMap[attributes.schemeIdUri];
+ if (keySystem) {
+ acc[keySystem] = {
+ attributes
+ };
+ const psshNode = findChildren(node, 'cenc:pssh')[0];
+ if (psshNode) {
+ const pssh = getContent(psshNode);
+ acc[keySystem].pssh = pssh && decodeB64ToUint8Array(pssh);
+ }
+ }
+ return acc;
+ }, {});
+ }; // defined in ANSI_SCTE 214-1 2016
+
+ const parseCaptionServiceMetadata = service => {
+ // 608 captions
+ if (service.schemeIdUri === 'urn:scte:dash:cc:cea-608:2015') {
+ const values = typeof service.value !== 'string' ? [] : service.value.split(';');
+ return values.map(value => {
+ let channel;
+ let language; // default language to value
+
+ language = value;
+ if (/^CC\d=/.test(value)) {
+ [channel, language] = value.split('=');
+ } else if (/^CC\d$/.test(value)) {
+ channel = value;
+ }
+ return {
+ channel,
+ language
+ };
+ });
+ } else if (service.schemeIdUri === 'urn:scte:dash:cc:cea-708:2015') {
+ const values = typeof service.value !== 'string' ? [] : service.value.split(';');
+ return values.map(value => {
+ const flags = {
+ // service or channel number 1-63
+ 'channel': undefined,
+ // language is a 3ALPHA per ISO 639.2/B
+ // field is required
+ 'language': undefined,
+ // BIT 1/0 or ?
+ // default value is 1, meaning 16:9 aspect ratio, 0 is 4:3, ? is unknown
+ 'aspectRatio': 1,
+ // BIT 1/0
+ // easy reader flag indicated the text is tailed to the needs of beginning readers
+ // default 0, or off
+ 'easyReader': 0,
+ // BIT 1/0
+ // If 3d metadata is present (CEA-708.1) then 1
+ // default 0
+ '3D': 0
+ };
+ if (/=/.test(value)) {
+ const [channel, opts = ''] = value.split('=');
+ flags.channel = channel;
+ flags.language = value;
+ opts.split(',').forEach(opt => {
+ const [name, val] = opt.split(':');
+ if (name === 'lang') {
+ flags.language = val; // er for easyReadery
+ } else if (name === 'er') {
+ flags.easyReader = Number(val); // war for wide aspect ratio
+ } else if (name === 'war') {
+ flags.aspectRatio = Number(val);
+ } else if (name === '3D') {
+ flags['3D'] = Number(val);
+ }
+ });
+ } else {
+ flags.language = value;
+ }
+ if (flags.channel) {
+ flags.channel = 'SERVICE' + flags.channel;
+ }
+ return flags;
+ });
+ }
+ };
+ /**
+ * A map callback that will parse all event stream data for a collection of periods
+ * DASH ISO_IEC_23009 5.10.2.2
+ * https://dashif-documents.azurewebsites.net/Events/master/event.html#mpd-event-timing
+ *
+ * @param {PeriodInformation} period object containing necessary period information
+ * @return a collection of parsed eventstream event objects
+ */
+
+ const toEventStream = period => {
+ // get and flatten all EventStreams tags and parse attributes and children
+ return flatten(findChildren(period.node, 'EventStream').map(eventStream => {
+ const eventStreamAttributes = parseAttributes(eventStream);
+ const schemeIdUri = eventStreamAttributes.schemeIdUri; // find all Events per EventStream tag and map to return objects
+
+ return findChildren(eventStream, 'Event').map(event => {
+ const eventAttributes = parseAttributes(event);
+ const presentationTime = eventAttributes.presentationTime || 0;
+ const timescale = eventStreamAttributes.timescale || 1;
+ const duration = eventAttributes.duration || 0;
+ const start = presentationTime / timescale + period.attributes.start;
+ return {
+ schemeIdUri,
+ value: eventStreamAttributes.value,
+ id: eventAttributes.id,
+ start,
+ end: start + duration / timescale,
+ messageData: getContent(event) || eventAttributes.messageData,
+ contentEncoding: eventStreamAttributes.contentEncoding,
+ presentationTimeOffset: eventStreamAttributes.presentationTimeOffset || 0
+ };
+ });
+ }));
+ };
+ /**
+ * Maps an AdaptationSet node to a list of Representation information objects
+ *
+ * @name toRepresentationsCallback
+ * @function
+ * @param {Node} adaptationSet
+ * AdaptationSet node from the mpd
+ * @return {RepresentationInformation[]}
+ * List of objects containing Representaion information
+ */
+
+ /**
+ * Returns a callback for Array.prototype.map for mapping AdaptationSet nodes to a list of
+ * Representation information objects
+ *
+ * @param {Object} periodAttributes
+ * Contains attributes inherited by the Period
+ * @param {Object[]} periodBaseUrls
+ * Contains list of objects with resolved base urls and attributes
+ * inherited by the Period
+ * @param {string[]} periodSegmentInfo
+ * Contains Segment Information at the period level
+ * @return {toRepresentationsCallback}
+ * Callback map function
+ */
+
+ const toRepresentations = (periodAttributes, periodBaseUrls, periodSegmentInfo) => adaptationSet => {
+ const adaptationSetAttributes = parseAttributes(adaptationSet);
+ const adaptationSetBaseUrls = buildBaseUrls(periodBaseUrls, findChildren(adaptationSet, 'BaseURL'));
+ const role = findChildren(adaptationSet, 'Role')[0];
+ const roleAttributes = {
+ role: parseAttributes(role)
+ };
+ let attrs = merge$1(periodAttributes, adaptationSetAttributes, roleAttributes);
+ const accessibility = findChildren(adaptationSet, 'Accessibility')[0];
+ const captionServices = parseCaptionServiceMetadata(parseAttributes(accessibility));
+ if (captionServices) {
+ attrs = merge$1(attrs, {
+ captionServices
+ });
+ }
+ const label = findChildren(adaptationSet, 'Label')[0];
+ if (label && label.childNodes.length) {
+ const labelVal = label.childNodes[0].nodeValue.trim();
+ attrs = merge$1(attrs, {
+ label: labelVal
+ });
+ }
+ const contentProtection = generateKeySystemInformation(findChildren(adaptationSet, 'ContentProtection'));
+ if (Object.keys(contentProtection).length) {
+ attrs = merge$1(attrs, {
+ contentProtection
+ });
+ }
+ const segmentInfo = getSegmentInformation(adaptationSet);
+ const representations = findChildren(adaptationSet, 'Representation');
+ const adaptationSetSegmentInfo = merge$1(periodSegmentInfo, segmentInfo);
+ return flatten(representations.map(inheritBaseUrls(attrs, adaptationSetBaseUrls, adaptationSetSegmentInfo)));
+ };
+ /**
+ * Contains all period information for mapping nodes onto adaptation sets.
+ *
+ * @typedef {Object} PeriodInformation
+ * @property {Node} period.node
+ * Period node from the mpd
+ * @property {Object} period.attributes
+ * Parsed period attributes from node plus any added
+ */
+
+ /**
+ * Maps a PeriodInformation object to a list of Representation information objects for all
+ * AdaptationSet nodes contained within the Period.
+ *
+ * @name toAdaptationSetsCallback
+ * @function
+ * @param {PeriodInformation} period
+ * Period object containing necessary period information
+ * @param {number} periodStart
+ * Start time of the Period within the mpd
+ * @return {RepresentationInformation[]}
+ * List of objects containing Representaion information
+ */
+
+ /**
+ * Returns a callback for Array.prototype.map for mapping Period nodes to a list of
+ * Representation information objects
+ *
+ * @param {Object} mpdAttributes
+ * Contains attributes inherited by the mpd
+ * @param {Object[]} mpdBaseUrls
+ * Contains list of objects with resolved base urls and attributes
+ * inherited by the mpd
+ * @return {toAdaptationSetsCallback}
+ * Callback map function
+ */
+
+ const toAdaptationSets = (mpdAttributes, mpdBaseUrls) => (period, index) => {
+ const periodBaseUrls = buildBaseUrls(mpdBaseUrls, findChildren(period.node, 'BaseURL'));
+ const periodAttributes = merge$1(mpdAttributes, {
+ periodStart: period.attributes.start
+ });
+ if (typeof period.attributes.duration === 'number') {
+ periodAttributes.periodDuration = period.attributes.duration;
+ }
+ const adaptationSets = findChildren(period.node, 'AdaptationSet');
+ const periodSegmentInfo = getSegmentInformation(period.node);
+ return flatten(adaptationSets.map(toRepresentations(periodAttributes, periodBaseUrls, periodSegmentInfo)));
+ };
+ /**
+ * Tranforms an array of content steering nodes into an object
+ * containing CDN content steering information from the MPD manifest.
+ *
+ * For more information on the DASH spec for Content Steering parsing, see:
+ * https://dashif.org/docs/DASH-IF-CTS-00XX-Content-Steering-Community-Review.pdf
+ *
+ * @param {Node[]} contentSteeringNodes
+ * Content steering nodes
+ * @param {Function} eventHandler
+ * The event handler passed into the parser options to handle warnings
+ * @return {Object}
+ * Object containing content steering data
+ */
+
+ const generateContentSteeringInformation = (contentSteeringNodes, eventHandler) => {
+ // If there are more than one ContentSteering tags, throw an error
+ if (contentSteeringNodes.length > 1) {
+ eventHandler({
+ type: 'warn',
+ message: 'The MPD manifest should contain no more than one ContentSteering tag'
+ });
+ } // Return a null value if there are no ContentSteering tags
+
+ if (!contentSteeringNodes.length) {
+ return null;
+ }
+ const infoFromContentSteeringTag = merge$1({
+ serverURL: getContent(contentSteeringNodes[0])
+ }, parseAttributes(contentSteeringNodes[0])); // Converts `queryBeforeStart` to a boolean, as well as setting the default value
+ // to `false` if it doesn't exist
+
+ infoFromContentSteeringTag.queryBeforeStart = infoFromContentSteeringTag.queryBeforeStart === 'true';
+ return infoFromContentSteeringTag;
+ };
+ /**
+ * Gets Period@start property for a given period.
+ *
+ * @param {Object} options
+ * Options object
+ * @param {Object} options.attributes
+ * Period attributes
+ * @param {Object} [options.priorPeriodAttributes]
+ * Prior period attributes (if prior period is available)
+ * @param {string} options.mpdType
+ * The MPD@type these periods came from
+ * @return {number|null}
+ * The period start, or null if it's an early available period or error
+ */
+
+ const getPeriodStart = ({
+ attributes,
+ priorPeriodAttributes,
+ mpdType
+ }) => {
+ // Summary of period start time calculation from DASH spec section 5.3.2.1
+ //
+ // A period's start is the first period's start + time elapsed after playing all
+ // prior periods to this one. Periods continue one after the other in time (without
+ // gaps) until the end of the presentation.
+ //
+ // The value of Period@start should be:
+ // 1. if Period@start is present: value of Period@start
+ // 2. if previous period exists and it has @duration: previous Period@start +
+ // previous Period@duration
+ // 3. if this is first period and MPD@type is 'static': 0
+ // 4. in all other cases, consider the period an "early available period" (note: not
+ // currently supported)
+ // (1)
+ if (typeof attributes.start === 'number') {
+ return attributes.start;
+ } // (2)
+
+ if (priorPeriodAttributes && typeof priorPeriodAttributes.start === 'number' && typeof priorPeriodAttributes.duration === 'number') {
+ return priorPeriodAttributes.start + priorPeriodAttributes.duration;
+ } // (3)
+
+ if (!priorPeriodAttributes && mpdType === 'static') {
+ return 0;
+ } // (4)
+ // There is currently no logic for calculating the Period@start value if there is
+ // no Period@start or prior Period@start and Period@duration available. This is not made
+ // explicit by the DASH interop guidelines or the DASH spec, however, since there's
+ // nothing about any other resolution strategies, it's implied. Thus, this case should
+ // be considered an early available period, or error, and null should suffice for both
+ // of those cases.
+
+ return null;
+ };
+ /**
+ * Traverses the mpd xml tree to generate a list of Representation information objects
+ * that have inherited attributes from parent nodes
+ *
+ * @param {Node} mpd
+ * The root node of the mpd
+ * @param {Object} options
+ * Available options for inheritAttributes
+ * @param {string} options.manifestUri
+ * The uri source of the mpd
+ * @param {number} options.NOW
+ * Current time per DASH IOP. Default is current time in ms since epoch
+ * @param {number} options.clientOffset
+ * Client time difference from NOW (in milliseconds)
+ * @return {RepresentationInformation[]}
+ * List of objects containing Representation information
+ */
+
+ const inheritAttributes = (mpd, options = {}) => {
+ const {
+ manifestUri = '',
+ NOW = Date.now(),
+ clientOffset = 0,
+ // TODO: For now, we are expecting an eventHandler callback function
+ // to be passed into the mpd parser as an option.
+ // In the future, we should enable stream parsing by using the Stream class from vhs-utils.
+ // This will support new features including a standardized event handler.
+ // See the m3u8 parser for examples of how stream parsing is currently used for HLS parsing.
+ // https://github.com/videojs/vhs-utils/blob/88d6e10c631e57a5af02c5a62bc7376cd456b4f5/src/stream.js#L9
+ eventHandler = function () {}
+ } = options;
+ const periodNodes = findChildren(mpd, 'Period');
+ if (!periodNodes.length) {
+ throw new Error(errors.INVALID_NUMBER_OF_PERIOD);
+ }
+ const locations = findChildren(mpd, 'Location');
+ const mpdAttributes = parseAttributes(mpd);
+ const mpdBaseUrls = buildBaseUrls([{
+ baseUrl: manifestUri
+ }], findChildren(mpd, 'BaseURL'));
+ const contentSteeringNodes = findChildren(mpd, 'ContentSteering'); // See DASH spec section 5.3.1.2, Semantics of MPD element. Default type to 'static'.
+
+ mpdAttributes.type = mpdAttributes.type || 'static';
+ mpdAttributes.sourceDuration = mpdAttributes.mediaPresentationDuration || 0;
+ mpdAttributes.NOW = NOW;
+ mpdAttributes.clientOffset = clientOffset;
+ if (locations.length) {
+ mpdAttributes.locations = locations.map(getContent);
+ }
+ const periods = []; // Since toAdaptationSets acts on individual periods right now, the simplest approach to
+ // adding properties that require looking at prior periods is to parse attributes and add
+ // missing ones before toAdaptationSets is called. If more such properties are added, it
+ // may be better to refactor toAdaptationSets.
+
+ periodNodes.forEach((node, index) => {
+ const attributes = parseAttributes(node); // Use the last modified prior period, as it may contain added information necessary
+ // for this period.
+
+ const priorPeriod = periods[index - 1];
+ attributes.start = getPeriodStart({
+ attributes,
+ priorPeriodAttributes: priorPeriod ? priorPeriod.attributes : null,
+ mpdType: mpdAttributes.type
+ });
+ periods.push({
+ node,
+ attributes
+ });
+ });
+ return {
+ locations: mpdAttributes.locations,
+ contentSteeringInfo: generateContentSteeringInformation(contentSteeringNodes, eventHandler),
+ // TODO: There are occurences where this `representationInfo` array contains undesired
+ // duplicates. This generally occurs when there are multiple BaseURL nodes that are
+ // direct children of the MPD node. When we attempt to resolve URLs from a combination of the
+ // parent BaseURL and a child BaseURL, and the value does not resolve,
+ // we end up returning the child BaseURL multiple times.
+ // We need to determine a way to remove these duplicates in a safe way.
+ // See: https://github.com/videojs/mpd-parser/pull/17#discussion_r162750527
+ representationInfo: flatten(periods.map(toAdaptationSets(mpdAttributes, mpdBaseUrls))),
+ eventStream: flatten(periods.map(toEventStream))
+ };
+ };
+ const stringToMpdXml = manifestString => {
+ if (manifestString === '') {
+ throw new Error(errors.DASH_EMPTY_MANIFEST);
+ }
+ const parser = new DOMParser();
+ let xml;
+ let mpd;
+ try {
+ xml = parser.parseFromString(manifestString, 'application/xml');
+ mpd = xml && xml.documentElement.tagName === 'MPD' ? xml.documentElement : null;
+ } catch (e) {// ie 11 throws on invalid xml
+ }
+ if (!mpd || mpd && mpd.getElementsByTagName('parsererror').length > 0) {
+ throw new Error(errors.DASH_INVALID_XML);
+ }
+ return mpd;
+ };
+
+ /**
+ * Parses the manifest for a UTCTiming node, returning the nodes attributes if found
+ *
+ * @param {string} mpd
+ * XML string of the MPD manifest
+ * @return {Object|null}
+ * Attributes of UTCTiming node specified in the manifest. Null if none found
+ */
+
+ const parseUTCTimingScheme = mpd => {
+ const UTCTimingNode = findChildren(mpd, 'UTCTiming')[0];
+ if (!UTCTimingNode) {
+ return null;
+ }
+ const attributes = parseAttributes(UTCTimingNode);
+ switch (attributes.schemeIdUri) {
+ case 'urn:mpeg:dash:utc:http-head:2014':
+ case 'urn:mpeg:dash:utc:http-head:2012':
+ attributes.method = 'HEAD';
+ break;
+ case 'urn:mpeg:dash:utc:http-xsdate:2014':
+ case 'urn:mpeg:dash:utc:http-iso:2014':
+ case 'urn:mpeg:dash:utc:http-xsdate:2012':
+ case 'urn:mpeg:dash:utc:http-iso:2012':
+ attributes.method = 'GET';
+ break;
+ case 'urn:mpeg:dash:utc:direct:2014':
+ case 'urn:mpeg:dash:utc:direct:2012':
+ attributes.method = 'DIRECT';
+ attributes.value = Date.parse(attributes.value);
+ break;
+ case 'urn:mpeg:dash:utc:http-ntp:2014':
+ case 'urn:mpeg:dash:utc:ntp:2014':
+ case 'urn:mpeg:dash:utc:sntp:2014':
+ default:
+ throw new Error(errors.UNSUPPORTED_UTC_TIMING_SCHEME);
+ }
+ return attributes;
+ };
+ /*
+ * Given a DASH manifest string and options, parses the DASH manifest into an object in the
+ * form outputed by m3u8-parser and accepted by videojs/http-streaming.
+ *
+ * For live DASH manifests, if `previousManifest` is provided in options, then the newly
+ * parsed DASH manifest will have its media sequence and discontinuity sequence values
+ * updated to reflect its position relative to the prior manifest.
+ *
+ * @param {string} manifestString - the DASH manifest as a string
+ * @param {options} [options] - any options
+ *
+ * @return {Object} the manifest object
+ */
+
+ const parse = (manifestString, options = {}) => {
+ const parsedManifestInfo = inheritAttributes(stringToMpdXml(manifestString), options);
+ const playlists = toPlaylists(parsedManifestInfo.representationInfo);
+ return toM3u8({
+ dashPlaylists: playlists,
+ locations: parsedManifestInfo.locations,
+ contentSteering: parsedManifestInfo.contentSteeringInfo,
+ sidxMapping: options.sidxMapping,
+ previousManifest: options.previousManifest,
+ eventStream: parsedManifestInfo.eventStream
+ });
+ };
+ /**
+ * Parses the manifest for a UTCTiming node, returning the nodes attributes if found
+ *
+ * @param {string} manifestString
+ * XML string of the MPD manifest
+ * @return {Object|null}
+ * Attributes of UTCTiming node specified in the manifest. Null if none found
+ */
+
+ const parseUTCTiming = manifestString => parseUTCTimingScheme(stringToMpdXml(manifestString));
+
+ var MAX_UINT32 = Math.pow(2, 32);
+ var getUint64$1 = function (uint8) {
+ var dv = new DataView(uint8.buffer, uint8.byteOffset, uint8.byteLength);
+ var value;
+ if (dv.getBigUint64) {
+ value = dv.getBigUint64(0);
+ if (value < Number.MAX_SAFE_INTEGER) {
+ return Number(value);
+ }
+ return value;
+ }
+ return dv.getUint32(0) * MAX_UINT32 + dv.getUint32(4);
+ };
+ var numbers = {
+ getUint64: getUint64$1,
+ MAX_UINT32: MAX_UINT32
+ };
+
+ var getUint64 = numbers.getUint64;
+ var parseSidx = function (data) {
+ var view = new DataView(data.buffer, data.byteOffset, data.byteLength),
+ result = {
+ version: data[0],
+ flags: new Uint8Array(data.subarray(1, 4)),
+ references: [],
+ referenceId: view.getUint32(4),
+ timescale: view.getUint32(8)
+ },
+ i = 12;
+ if (result.version === 0) {
+ result.earliestPresentationTime = view.getUint32(i);
+ result.firstOffset = view.getUint32(i + 4);
+ i += 8;
+ } else {
+ // read 64 bits
+ result.earliestPresentationTime = getUint64(data.subarray(i));
+ result.firstOffset = getUint64(data.subarray(i + 8));
+ i += 16;
+ }
+ i += 2; // reserved
+
+ var referenceCount = view.getUint16(i);
+ i += 2; // start of references
+
+ for (; referenceCount > 0; i += 12, referenceCount--) {
+ result.references.push({
+ referenceType: (data[i] & 0x80) >>> 7,
+ referencedSize: view.getUint32(i) & 0x7FFFFFFF,
+ subsegmentDuration: view.getUint32(i + 4),
+ startsWithSap: !!(data[i + 8] & 0x80),
+ sapType: (data[i + 8] & 0x70) >>> 4,
+ sapDeltaTime: view.getUint32(i + 8) & 0x0FFFFFFF
+ });
+ }
+ return result;
+ };
+ var parseSidx_1 = parseSidx;
+
+ var ID3 = toUint8([0x49, 0x44, 0x33]);
+ var getId3Size = function getId3Size(bytes, offset) {
+ if (offset === void 0) {
+ offset = 0;
+ }
+ bytes = toUint8(bytes);
+ var flags = bytes[offset + 5];
+ var returnSize = bytes[offset + 6] << 21 | bytes[offset + 7] << 14 | bytes[offset + 8] << 7 | bytes[offset + 9];
+ var footerPresent = (flags & 16) >> 4;
+ if (footerPresent) {
+ return returnSize + 20;
+ }
+ return returnSize + 10;
+ };
+ var getId3Offset = function getId3Offset(bytes, offset) {
+ if (offset === void 0) {
+ offset = 0;
+ }
+ bytes = toUint8(bytes);
+ if (bytes.length - offset < 10 || !bytesMatch(bytes, ID3, {
+ offset: offset
+ })) {
+ return offset;
+ }
+ offset += getId3Size(bytes, offset); // recursive check for id3 tags as some files
+ // have multiple ID3 tag sections even though
+ // they should not.
+
+ return getId3Offset(bytes, offset);
+ };
+
+ var normalizePath$1 = function normalizePath(path) {
+ if (typeof path === 'string') {
+ return stringToBytes(path);
+ }
+ if (typeof path === 'number') {
+ return path;
+ }
+ return path;
+ };
+ var normalizePaths$1 = function normalizePaths(paths) {
+ if (!Array.isArray(paths)) {
+ return [normalizePath$1(paths)];
+ }
+ return paths.map(function (p) {
+ return normalizePath$1(p);
+ });
+ };
+ /**
+ * find any number of boxes by name given a path to it in an iso bmff
+ * such as mp4.
+ *
+ * @param {TypedArray} bytes
+ * bytes for the iso bmff to search for boxes in
+ *
+ * @param {Uint8Array[]|string[]|string|Uint8Array} name
+ * An array of paths or a single path representing the name
+ * of boxes to search through in bytes. Paths may be
+ * uint8 (character codes) or strings.
+ *
+ * @param {boolean} [complete=false]
+ * Should we search only for complete boxes on the final path.
+ * This is very useful when you do not want to get back partial boxes
+ * in the case of streaming files.
+ *
+ * @return {Uint8Array[]}
+ * An array of the end paths that we found.
+ */
+
+ var findBox = function findBox(bytes, paths, complete) {
+ if (complete === void 0) {
+ complete = false;
+ }
+ paths = normalizePaths$1(paths);
+ bytes = toUint8(bytes);
+ var results = [];
+ if (!paths.length) {
+ // short-circuit the search for empty paths
+ return results;
+ }
+ var i = 0;
+ while (i < bytes.length) {
+ var size = (bytes[i] << 24 | bytes[i + 1] << 16 | bytes[i + 2] << 8 | bytes[i + 3]) >>> 0;
+ var type = bytes.subarray(i + 4, i + 8); // invalid box format.
+
+ if (size === 0) {
+ break;
+ }
+ var end = i + size;
+ if (end > bytes.length) {
+ // this box is bigger than the number of bytes we have
+ // and complete is set, we cannot find any more boxes.
+ if (complete) {
+ break;
+ }
+ end = bytes.length;
+ }
+ var data = bytes.subarray(i + 8, end);
+ if (bytesMatch(type, paths[0])) {
+ if (paths.length === 1) {
+ // this is the end of the path and we've found the box we were
+ // looking for
+ results.push(data);
+ } else {
+ // recursively search for the next box along the path
+ results.push.apply(results, findBox(data, paths.slice(1), complete));
+ }
+ }
+ i = end;
+ } // we've finished searching all of bytes
+
+ return results;
+ };
+
+ // https://matroska-org.github.io/libebml/specs.html
+ // https://www.matroska.org/technical/elements.html
+ // https://www.webmproject.org/docs/container/
+
+ var EBML_TAGS = {
+ EBML: toUint8([0x1A, 0x45, 0xDF, 0xA3]),
+ DocType: toUint8([0x42, 0x82]),
+ Segment: toUint8([0x18, 0x53, 0x80, 0x67]),
+ SegmentInfo: toUint8([0x15, 0x49, 0xA9, 0x66]),
+ Tracks: toUint8([0x16, 0x54, 0xAE, 0x6B]),
+ Track: toUint8([0xAE]),
+ TrackNumber: toUint8([0xd7]),
+ DefaultDuration: toUint8([0x23, 0xe3, 0x83]),
+ TrackEntry: toUint8([0xAE]),
+ TrackType: toUint8([0x83]),
+ FlagDefault: toUint8([0x88]),
+ CodecID: toUint8([0x86]),
+ CodecPrivate: toUint8([0x63, 0xA2]),
+ VideoTrack: toUint8([0xe0]),
+ AudioTrack: toUint8([0xe1]),
+ // Not used yet, but will be used for live webm/mkv
+ // see https://www.matroska.org/technical/basics.html#block-structure
+ // see https://www.matroska.org/technical/basics.html#simpleblock-structure
+ Cluster: toUint8([0x1F, 0x43, 0xB6, 0x75]),
+ Timestamp: toUint8([0xE7]),
+ TimestampScale: toUint8([0x2A, 0xD7, 0xB1]),
+ BlockGroup: toUint8([0xA0]),
+ BlockDuration: toUint8([0x9B]),
+ Block: toUint8([0xA1]),
+ SimpleBlock: toUint8([0xA3])
+ };
+ /**
+ * This is a simple table to determine the length
+ * of things in ebml. The length is one based (starts at 1,
+ * rather than zero) and for every zero bit before a one bit
+ * we add one to length. We also need this table because in some
+ * case we have to xor all the length bits from another value.
+ */
+
+ var LENGTH_TABLE = [128, 64, 32, 16, 8, 4, 2, 1];
+ var getLength = function getLength(byte) {
+ var len = 1;
+ for (var i = 0; i < LENGTH_TABLE.length; i++) {
+ if (byte & LENGTH_TABLE[i]) {
+ break;
+ }
+ len++;
+ }
+ return len;
+ }; // length in ebml is stored in the first 4 to 8 bits
+ // of the first byte. 4 for the id length and 8 for the
+ // data size length. Length is measured by converting the number to binary
+ // then 1 + the number of zeros before a 1 is encountered starting
+ // from the left.
+
+ var getvint = function getvint(bytes, offset, removeLength, signed) {
+ if (removeLength === void 0) {
+ removeLength = true;
+ }
+ if (signed === void 0) {
+ signed = false;
+ }
+ var length = getLength(bytes[offset]);
+ var valueBytes = bytes.subarray(offset, offset + length); // NOTE that we do **not** subarray here because we need to copy these bytes
+ // as they will be modified below to remove the dataSizeLen bits and we do not
+ // want to modify the original data. normally we could just call slice on
+ // uint8array but ie 11 does not support that...
+
+ if (removeLength) {
+ valueBytes = Array.prototype.slice.call(bytes, offset, offset + length);
+ valueBytes[0] ^= LENGTH_TABLE[length - 1];
+ }
+ return {
+ length: length,
+ value: bytesToNumber(valueBytes, {
+ signed: signed
+ }),
+ bytes: valueBytes
+ };
+ };
+ var normalizePath = function normalizePath(path) {
+ if (typeof path === 'string') {
+ return path.match(/.{1,2}/g).map(function (p) {
+ return normalizePath(p);
+ });
+ }
+ if (typeof path === 'number') {
+ return numberToBytes(path);
+ }
+ return path;
+ };
+ var normalizePaths = function normalizePaths(paths) {
+ if (!Array.isArray(paths)) {
+ return [normalizePath(paths)];
+ }
+ return paths.map(function (p) {
+ return normalizePath(p);
+ });
+ };
+ var getInfinityDataSize = function getInfinityDataSize(id, bytes, offset) {
+ if (offset >= bytes.length) {
+ return bytes.length;
+ }
+ var innerid = getvint(bytes, offset, false);
+ if (bytesMatch(id.bytes, innerid.bytes)) {
+ return offset;
+ }
+ var dataHeader = getvint(bytes, offset + innerid.length);
+ return getInfinityDataSize(id, bytes, offset + dataHeader.length + dataHeader.value + innerid.length);
+ };
+ /**
+ * Notes on the EBLM format.
+ *
+ * EBLM uses "vints" tags. Every vint tag contains
+ * two parts
+ *
+ * 1. The length from the first byte. You get this by
+ * converting the byte to binary and counting the zeros
+ * before a 1. Then you add 1 to that. Examples
+ * 00011111 = length 4 because there are 3 zeros before a 1.
+ * 00100000 = length 3 because there are 2 zeros before a 1.
+ * 00000011 = length 7 because there are 6 zeros before a 1.
+ *
+ * 2. The bits used for length are removed from the first byte
+ * Then all the bytes are merged into a value. NOTE: this
+ * is not the case for id ebml tags as there id includes
+ * length bits.
+ *
+ */
+
+ var findEbml = function findEbml(bytes, paths) {
+ paths = normalizePaths(paths);
+ bytes = toUint8(bytes);
+ var results = [];
+ if (!paths.length) {
+ return results;
+ }
+ var i = 0;
+ while (i < bytes.length) {
+ var id = getvint(bytes, i, false);
+ var dataHeader = getvint(bytes, i + id.length);
+ var dataStart = i + id.length + dataHeader.length; // dataSize is unknown or this is a live stream
+
+ if (dataHeader.value === 0x7f) {
+ dataHeader.value = getInfinityDataSize(id, bytes, dataStart);
+ if (dataHeader.value !== bytes.length) {
+ dataHeader.value -= dataStart;
+ }
+ }
+ var dataEnd = dataStart + dataHeader.value > bytes.length ? bytes.length : dataStart + dataHeader.value;
+ var data = bytes.subarray(dataStart, dataEnd);
+ if (bytesMatch(paths[0], id.bytes)) {
+ if (paths.length === 1) {
+ // this is the end of the paths and we've found the tag we were
+ // looking for
+ results.push(data);
+ } else {
+ // recursively search for the next tag inside of the data
+ // of this one
+ results = results.concat(findEbml(data, paths.slice(1)));
+ }
+ }
+ var totalLength = id.length + dataHeader.length + data.length; // move past this tag entirely, we are not looking for it
+
+ i += totalLength;
+ }
+ return results;
+ }; // see https://www.matroska.org/technical/basics.html#block-structure
+
+ var NAL_TYPE_ONE = toUint8([0x00, 0x00, 0x00, 0x01]);
+ var NAL_TYPE_TWO = toUint8([0x00, 0x00, 0x01]);
+ var EMULATION_PREVENTION = toUint8([0x00, 0x00, 0x03]);
+ /**
+ * Expunge any "Emulation Prevention" bytes from a "Raw Byte
+ * Sequence Payload"
+ *
+ * @param data {Uint8Array} the bytes of a RBSP from a NAL
+ * unit
+ * @return {Uint8Array} the RBSP without any Emulation
+ * Prevention Bytes
+ */
+
+ var discardEmulationPreventionBytes = function discardEmulationPreventionBytes(bytes) {
+ var positions = [];
+ var i = 1; // Find all `Emulation Prevention Bytes`
+
+ while (i < bytes.length - 2) {
+ if (bytesMatch(bytes.subarray(i, i + 3), EMULATION_PREVENTION)) {
+ positions.push(i + 2);
+ i++;
+ }
+ i++;
+ } // If no Emulation Prevention Bytes were found just return the original
+ // array
+
+ if (positions.length === 0) {
+ return bytes;
+ } // Create a new array to hold the NAL unit data
+
+ var newLength = bytes.length - positions.length;
+ var newData = new Uint8Array(newLength);
+ var sourceIndex = 0;
+ for (i = 0; i < newLength; sourceIndex++, i++) {
+ if (sourceIndex === positions[0]) {
+ // Skip this byte
+ sourceIndex++; // Remove this position index
+
+ positions.shift();
+ }
+ newData[i] = bytes[sourceIndex];
+ }
+ return newData;
+ };
+ var findNal = function findNal(bytes, dataType, types, nalLimit) {
+ if (nalLimit === void 0) {
+ nalLimit = Infinity;
+ }
+ bytes = toUint8(bytes);
+ types = [].concat(types);
+ var i = 0;
+ var nalStart;
+ var nalsFound = 0; // keep searching until:
+ // we reach the end of bytes
+ // we reach the maximum number of nals they want to seach
+ // NOTE: that we disregard nalLimit when we have found the start
+ // of the nal we want so that we can find the end of the nal we want.
+
+ while (i < bytes.length && (nalsFound < nalLimit || nalStart)) {
+ var nalOffset = void 0;
+ if (bytesMatch(bytes.subarray(i), NAL_TYPE_ONE)) {
+ nalOffset = 4;
+ } else if (bytesMatch(bytes.subarray(i), NAL_TYPE_TWO)) {
+ nalOffset = 3;
+ } // we are unsynced,
+ // find the next nal unit
+
+ if (!nalOffset) {
+ i++;
+ continue;
+ }
+ nalsFound++;
+ if (nalStart) {
+ return discardEmulationPreventionBytes(bytes.subarray(nalStart, i));
+ }
+ var nalType = void 0;
+ if (dataType === 'h264') {
+ nalType = bytes[i + nalOffset] & 0x1f;
+ } else if (dataType === 'h265') {
+ nalType = bytes[i + nalOffset] >> 1 & 0x3f;
+ }
+ if (types.indexOf(nalType) !== -1) {
+ nalStart = i + nalOffset;
+ } // nal header is 1 length for h264, and 2 for h265
+
+ i += nalOffset + (dataType === 'h264' ? 1 : 2);
+ }
+ return bytes.subarray(0, 0);
+ };
+ var findH264Nal = function findH264Nal(bytes, type, nalLimit) {
+ return findNal(bytes, 'h264', type, nalLimit);
+ };
+ var findH265Nal = function findH265Nal(bytes, type, nalLimit) {
+ return findNal(bytes, 'h265', type, nalLimit);
+ };
+
+ var CONSTANTS = {
+ // "webm" string literal in hex
+ 'webm': toUint8([0x77, 0x65, 0x62, 0x6d]),
+ // "matroska" string literal in hex
+ 'matroska': toUint8([0x6d, 0x61, 0x74, 0x72, 0x6f, 0x73, 0x6b, 0x61]),
+ // "fLaC" string literal in hex
+ 'flac': toUint8([0x66, 0x4c, 0x61, 0x43]),
+ // "OggS" string literal in hex
+ 'ogg': toUint8([0x4f, 0x67, 0x67, 0x53]),
+ // ac-3 sync byte, also works for ec-3 as that is simply a codec
+ // of ac-3
+ 'ac3': toUint8([0x0b, 0x77]),
+ // "RIFF" string literal in hex used for wav and avi
+ 'riff': toUint8([0x52, 0x49, 0x46, 0x46]),
+ // "AVI" string literal in hex
+ 'avi': toUint8([0x41, 0x56, 0x49]),
+ // "WAVE" string literal in hex
+ 'wav': toUint8([0x57, 0x41, 0x56, 0x45]),
+ // "ftyp3g" string literal in hex
+ '3gp': toUint8([0x66, 0x74, 0x79, 0x70, 0x33, 0x67]),
+ // "ftyp" string literal in hex
+ 'mp4': toUint8([0x66, 0x74, 0x79, 0x70]),
+ // "styp" string literal in hex
+ 'fmp4': toUint8([0x73, 0x74, 0x79, 0x70]),
+ // "ftypqt" string literal in hex
+ 'mov': toUint8([0x66, 0x74, 0x79, 0x70, 0x71, 0x74]),
+ // moov string literal in hex
+ 'moov': toUint8([0x6D, 0x6F, 0x6F, 0x76]),
+ // moof string literal in hex
+ 'moof': toUint8([0x6D, 0x6F, 0x6F, 0x66])
+ };
+ var _isLikely = {
+ aac: function aac(bytes) {
+ var offset = getId3Offset(bytes);
+ return bytesMatch(bytes, [0xFF, 0x10], {
+ offset: offset,
+ mask: [0xFF, 0x16]
+ });
+ },
+ mp3: function mp3(bytes) {
+ var offset = getId3Offset(bytes);
+ return bytesMatch(bytes, [0xFF, 0x02], {
+ offset: offset,
+ mask: [0xFF, 0x06]
+ });
+ },
+ webm: function webm(bytes) {
+ var docType = findEbml(bytes, [EBML_TAGS.EBML, EBML_TAGS.DocType])[0]; // check if DocType EBML tag is webm
+
+ return bytesMatch(docType, CONSTANTS.webm);
+ },
+ mkv: function mkv(bytes) {
+ var docType = findEbml(bytes, [EBML_TAGS.EBML, EBML_TAGS.DocType])[0]; // check if DocType EBML tag is matroska
+
+ return bytesMatch(docType, CONSTANTS.matroska);
+ },
+ mp4: function mp4(bytes) {
+ // if this file is another base media file format, it is not mp4
+ if (_isLikely['3gp'](bytes) || _isLikely.mov(bytes)) {
+ return false;
+ } // if this file starts with a ftyp or styp box its mp4
+
+ if (bytesMatch(bytes, CONSTANTS.mp4, {
+ offset: 4
+ }) || bytesMatch(bytes, CONSTANTS.fmp4, {
+ offset: 4
+ })) {
+ return true;
+ } // if this file starts with a moof/moov box its mp4
+
+ if (bytesMatch(bytes, CONSTANTS.moof, {
+ offset: 4
+ }) || bytesMatch(bytes, CONSTANTS.moov, {
+ offset: 4
+ })) {
+ return true;
+ }
+ },
+ mov: function mov(bytes) {
+ return bytesMatch(bytes, CONSTANTS.mov, {
+ offset: 4
+ });
+ },
+ '3gp': function gp(bytes) {
+ return bytesMatch(bytes, CONSTANTS['3gp'], {
+ offset: 4
+ });
+ },
+ ac3: function ac3(bytes) {
+ var offset = getId3Offset(bytes);
+ return bytesMatch(bytes, CONSTANTS.ac3, {
+ offset: offset
+ });
+ },
+ ts: function ts(bytes) {
+ if (bytes.length < 189 && bytes.length >= 1) {
+ return bytes[0] === 0x47;
+ }
+ var i = 0; // check the first 376 bytes for two matching sync bytes
+
+ while (i + 188 < bytes.length && i < 188) {
+ if (bytes[i] === 0x47 && bytes[i + 188] === 0x47) {
+ return true;
+ }
+ i += 1;
+ }
+ return false;
+ },
+ flac: function flac(bytes) {
+ var offset = getId3Offset(bytes);
+ return bytesMatch(bytes, CONSTANTS.flac, {
+ offset: offset
+ });
+ },
+ ogg: function ogg(bytes) {
+ return bytesMatch(bytes, CONSTANTS.ogg);
+ },
+ avi: function avi(bytes) {
+ return bytesMatch(bytes, CONSTANTS.riff) && bytesMatch(bytes, CONSTANTS.avi, {
+ offset: 8
+ });
+ },
+ wav: function wav(bytes) {
+ return bytesMatch(bytes, CONSTANTS.riff) && bytesMatch(bytes, CONSTANTS.wav, {
+ offset: 8
+ });
+ },
+ 'h264': function h264(bytes) {
+ // find seq_parameter_set_rbsp
+ return findH264Nal(bytes, 7, 3).length;
+ },
+ 'h265': function h265(bytes) {
+ // find video_parameter_set_rbsp or seq_parameter_set_rbsp
+ return findH265Nal(bytes, [32, 33], 3).length;
+ }
+ }; // get all the isLikely functions
+ // but make sure 'ts' is above h264 and h265
+ // but below everything else as it is the least specific
+
+ var isLikelyTypes = Object.keys(_isLikely) // remove ts, h264, h265
+ .filter(function (t) {
+ return t !== 'ts' && t !== 'h264' && t !== 'h265';
+ }) // add it back to the bottom
+ .concat(['ts', 'h264', 'h265']); // make sure we are dealing with uint8 data.
+
+ isLikelyTypes.forEach(function (type) {
+ var isLikelyFn = _isLikely[type];
+ _isLikely[type] = function (bytes) {
+ return isLikelyFn(toUint8(bytes));
+ };
+ }); // export after wrapping
+
+ var isLikely = _isLikely; // A useful list of file signatures can be found here
+ // https://en.wikipedia.org/wiki/List_of_file_signatures
+
+ var detectContainerForBytes = function detectContainerForBytes(bytes) {
+ bytes = toUint8(bytes);
+ for (var i = 0; i < isLikelyTypes.length; i++) {
+ var type = isLikelyTypes[i];
+ if (isLikely[type](bytes)) {
+ return type;
+ }
+ }
+ return '';
+ }; // fmp4 is not a container
+
+ var isLikelyFmp4MediaSegment = function isLikelyFmp4MediaSegment(bytes) {
+ return findBox(bytes, ['moof']).length > 0;
+ };
+
+ /**
+ * mux.js
+ *
+ * Copyright (c) Brightcove
+ * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
+ */
+ var ONE_SECOND_IN_TS = 90000,
+ // 90kHz clock
+ secondsToVideoTs,
+ secondsToAudioTs,
+ videoTsToSeconds,
+ audioTsToSeconds,
+ audioTsToVideoTs,
+ videoTsToAudioTs,
+ metadataTsToSeconds;
+ secondsToVideoTs = function (seconds) {
+ return seconds * ONE_SECOND_IN_TS;
+ };
+ secondsToAudioTs = function (seconds, sampleRate) {
+ return seconds * sampleRate;
+ };
+ videoTsToSeconds = function (timestamp) {
+ return timestamp / ONE_SECOND_IN_TS;
+ };
+ audioTsToSeconds = function (timestamp, sampleRate) {
+ return timestamp / sampleRate;
+ };
+ audioTsToVideoTs = function (timestamp, sampleRate) {
+ return secondsToVideoTs(audioTsToSeconds(timestamp, sampleRate));
+ };
+ videoTsToAudioTs = function (timestamp, sampleRate) {
+ return secondsToAudioTs(videoTsToSeconds(timestamp), sampleRate);
+ };
+
+ /**
+ * Adjust ID3 tag or caption timing information by the timeline pts values
+ * (if keepOriginalTimestamps is false) and convert to seconds
+ */
+ metadataTsToSeconds = function (timestamp, timelineStartPts, keepOriginalTimestamps) {
+ return videoTsToSeconds(keepOriginalTimestamps ? timestamp : timestamp - timelineStartPts);
+ };
+ var clock = {
+ ONE_SECOND_IN_TS: ONE_SECOND_IN_TS,
+ secondsToVideoTs: secondsToVideoTs,
+ secondsToAudioTs: secondsToAudioTs,
+ videoTsToSeconds: videoTsToSeconds,
+ audioTsToSeconds: audioTsToSeconds,
+ audioTsToVideoTs: audioTsToVideoTs,
+ videoTsToAudioTs: videoTsToAudioTs,
+ metadataTsToSeconds: metadataTsToSeconds
+ };
+ var clock_1 = clock.ONE_SECOND_IN_TS;
+
+ /*! @name @videojs/http-streaming @version 3.12.1 @license Apache-2.0 */
+
+ /**
+ * @file resolve-url.js - Handling how URLs are resolved and manipulated
+ */
+ const resolveUrl = resolveUrl$1;
+ /**
+ * If the xhr request was redirected, return the responseURL, otherwise,
+ * return the original url.
+ *
+ * @api private
+ *
+ * @param {string} url - an url being requested
+ * @param {XMLHttpRequest} req - xhr request result
+ *
+ * @return {string}
+ */
+
+ const resolveManifestRedirect = (url, req) => {
+ // To understand how the responseURL below is set and generated:
+ // - https://fetch.spec.whatwg.org/#concept-response-url
+ // - https://fetch.spec.whatwg.org/#atomic-http-redirect-handling
+ if (req && req.responseURL && url !== req.responseURL) {
+ return req.responseURL;
+ }
+ return url;
+ };
+ const logger = source => {
+ if (videojs.log.debug) {
+ return videojs.log.debug.bind(videojs, 'VHS:', `${source} >`);
+ }
+ return function () {};
+ };
+
+ /**
+ * Provides a compatibility layer between Video.js 7 and 8 API changes for VHS.
+ */
+ /**
+ * Delegates to videojs.obj.merge (Video.js 8) or
+ * videojs.mergeOptions (Video.js 7).
+ */
+
+ function merge(...args) {
+ const context = videojs.obj || videojs;
+ const fn = context.merge || context.mergeOptions;
+ return fn.apply(context, args);
+ }
+ /**
+ * Delegates to videojs.time.createTimeRanges (Video.js 8) or
+ * videojs.createTimeRanges (Video.js 7).
+ */
+
+ function createTimeRanges(...args) {
+ const context = videojs.time || videojs;
+ const fn = context.createTimeRanges || context.createTimeRanges;
+ return fn.apply(context, args);
+ }
+ /**
+ * Converts provided buffered ranges to a descriptive string
+ *
+ * @param {TimeRanges} buffered - received buffered time ranges
+ *
+ * @return {string} - descriptive string
+ */
+
+ function bufferedRangesToString(buffered) {
+ if (buffered.length === 0) {
+ return 'Buffered Ranges are empty';
+ }
+ let bufferedRangesStr = 'Buffered Ranges: \n';
+ for (let i = 0; i < buffered.length; i++) {
+ const start = buffered.start(i);
+ const end = buffered.end(i);
+ bufferedRangesStr += `${start} --> ${end}. Duration (${end - start})\n`;
+ }
+ return bufferedRangesStr;
+ }
+
+ /**
+ * ranges
+ *
+ * Utilities for working with TimeRanges.
+ *
+ */
+
+ const TIME_FUDGE_FACTOR = 1 / 30; // Comparisons between time values such as current time and the end of the buffered range
+ // can be misleading because of precision differences or when the current media has poorly
+ // aligned audio and video, which can cause values to be slightly off from what you would
+ // expect. This value is what we consider to be safe to use in such comparisons to account
+ // for these scenarios.
+
+ const SAFE_TIME_DELTA = TIME_FUDGE_FACTOR * 3;
+ const filterRanges = function (timeRanges, predicate) {
+ const results = [];
+ let i;
+ if (timeRanges && timeRanges.length) {
+ // Search for ranges that match the predicate
+ for (i = 0; i < timeRanges.length; i++) {
+ if (predicate(timeRanges.start(i), timeRanges.end(i))) {
+ results.push([timeRanges.start(i), timeRanges.end(i)]);
+ }
+ }
+ }
+ return createTimeRanges(results);
+ };
+ /**
+ * Attempts to find the buffered TimeRange that contains the specified
+ * time.
+ *
+ * @param {TimeRanges} buffered - the TimeRanges object to query
+ * @param {number} time - the time to filter on.
+ * @return {TimeRanges} a new TimeRanges object
+ */
+
+ const findRange = function (buffered, time) {
+ return filterRanges(buffered, function (start, end) {
+ return start - SAFE_TIME_DELTA <= time && end + SAFE_TIME_DELTA >= time;
+ });
+ };
+ /**
+ * Returns the TimeRanges that begin later than the specified time.
+ *
+ * @param {TimeRanges} timeRanges - the TimeRanges object to query
+ * @param {number} time - the time to filter on.
+ * @return {TimeRanges} a new TimeRanges object.
+ */
+
+ const findNextRange = function (timeRanges, time) {
+ return filterRanges(timeRanges, function (start) {
+ return start - TIME_FUDGE_FACTOR >= time;
+ });
+ };
+ /**
+ * Returns gaps within a list of TimeRanges
+ *
+ * @param {TimeRanges} buffered - the TimeRanges object
+ * @return {TimeRanges} a TimeRanges object of gaps
+ */
+
+ const findGaps = function (buffered) {
+ if (buffered.length < 2) {
+ return createTimeRanges();
+ }
+ const ranges = [];
+ for (let i = 1; i < buffered.length; i++) {
+ const start = buffered.end(i - 1);
+ const end = buffered.start(i);
+ ranges.push([start, end]);
+ }
+ return createTimeRanges(ranges);
+ };
+ /**
+ * Calculate the intersection of two TimeRanges
+ *
+ * @param {TimeRanges} bufferA
+ * @param {TimeRanges} bufferB
+ * @return {TimeRanges} The interesection of `bufferA` with `bufferB`
+ */
+
+ const bufferIntersection = function (bufferA, bufferB) {
+ let start = null;
+ let end = null;
+ let arity = 0;
+ const extents = [];
+ const ranges = [];
+ if (!bufferA || !bufferA.length || !bufferB || !bufferB.length) {
+ return createTimeRanges();
+ } // Handle the case where we have both buffers and create an
+ // intersection of the two
+
+ let count = bufferA.length; // A) Gather up all start and end times
+
+ while (count--) {
+ extents.push({
+ time: bufferA.start(count),
+ type: 'start'
+ });
+ extents.push({
+ time: bufferA.end(count),
+ type: 'end'
+ });
+ }
+ count = bufferB.length;
+ while (count--) {
+ extents.push({
+ time: bufferB.start(count),
+ type: 'start'
+ });
+ extents.push({
+ time: bufferB.end(count),
+ type: 'end'
+ });
+ } // B) Sort them by time
+
+ extents.sort(function (a, b) {
+ return a.time - b.time;
+ }); // C) Go along one by one incrementing arity for start and decrementing
+ // arity for ends
+
+ for (count = 0; count < extents.length; count++) {
+ if (extents[count].type === 'start') {
+ arity++; // D) If arity is ever incremented to 2 we are entering an
+ // overlapping range
+
+ if (arity === 2) {
+ start = extents[count].time;
+ }
+ } else if (extents[count].type === 'end') {
+ arity--; // E) If arity is ever decremented to 1 we leaving an
+ // overlapping range
+
+ if (arity === 1) {
+ end = extents[count].time;
+ }
+ } // F) Record overlapping ranges
+
+ if (start !== null && end !== null) {
+ ranges.push([start, end]);
+ start = null;
+ end = null;
+ }
+ }
+ return createTimeRanges(ranges);
+ };
+ /**
+ * Gets a human readable string for a TimeRange
+ *
+ * @param {TimeRange} range
+ * @return {string} a human readable string
+ */
+
+ const printableRange = range => {
+ const strArr = [];
+ if (!range || !range.length) {
+ return '';
+ }
+ for (let i = 0; i < range.length; i++) {
+ strArr.push(range.start(i) + ' => ' + range.end(i));
+ }
+ return strArr.join(', ');
+ };
+ /**
+ * Calculates the amount of time left in seconds until the player hits the end of the
+ * buffer and causes a rebuffer
+ *
+ * @param {TimeRange} buffered
+ * The state of the buffer
+ * @param {Numnber} currentTime
+ * The current time of the player
+ * @param {number} playbackRate
+ * The current playback rate of the player. Defaults to 1.
+ * @return {number}
+ * Time until the player has to start rebuffering in seconds.
+ * @function timeUntilRebuffer
+ */
+
+ const timeUntilRebuffer = function (buffered, currentTime, playbackRate = 1) {
+ const bufferedEnd = buffered.length ? buffered.end(buffered.length - 1) : 0;
+ return (bufferedEnd - currentTime) / playbackRate;
+ };
+ /**
+ * Converts a TimeRanges object into an array representation
+ *
+ * @param {TimeRanges} timeRanges
+ * @return {Array}
+ */
+
+ const timeRangesToArray = timeRanges => {
+ const timeRangesList = [];
+ for (let i = 0; i < timeRanges.length; i++) {
+ timeRangesList.push({
+ start: timeRanges.start(i),
+ end: timeRanges.end(i)
+ });
+ }
+ return timeRangesList;
+ };
+ /**
+ * Determines if two time range objects are different.
+ *
+ * @param {TimeRange} a
+ * the first time range object to check
+ *
+ * @param {TimeRange} b
+ * the second time range object to check
+ *
+ * @return {Boolean}
+ * Whether the time range objects differ
+ */
+
+ const isRangeDifferent = function (a, b) {
+ // same object
+ if (a === b) {
+ return false;
+ } // one or the other is undefined
+
+ if (!a && b || !b && a) {
+ return true;
+ } // length is different
+
+ if (a.length !== b.length) {
+ return true;
+ } // see if any start/end pair is different
+
+ for (let i = 0; i < a.length; i++) {
+ if (a.start(i) !== b.start(i) || a.end(i) !== b.end(i)) {
+ return true;
+ }
+ } // if the length and every pair is the same
+ // this is the same time range
+
+ return false;
+ };
+ const lastBufferedEnd = function (a) {
+ if (!a || !a.length || !a.end) {
+ return;
+ }
+ return a.end(a.length - 1);
+ };
+ /**
+ * A utility function to add up the amount of time in a timeRange
+ * after a specified startTime.
+ * ie:[[0, 10], [20, 40], [50, 60]] with a startTime 0
+ * would return 40 as there are 40s seconds after 0 in the timeRange
+ *
+ * @param {TimeRange} range
+ * The range to check against
+ * @param {number} startTime
+ * The time in the time range that you should start counting from
+ *
+ * @return {number}
+ * The number of seconds in the buffer passed the specified time.
+ */
+
+ const timeAheadOf = function (range, startTime) {
+ let time = 0;
+ if (!range || !range.length) {
+ return time;
+ }
+ for (let i = 0; i < range.length; i++) {
+ const start = range.start(i);
+ const end = range.end(i); // startTime is after this range entirely
+
+ if (startTime > end) {
+ continue;
+ } // startTime is within this range
+
+ if (startTime > start && startTime <= end) {
+ time += end - startTime;
+ continue;
+ } // startTime is before this range.
+
+ time += end - start;
+ }
+ return time;
+ };
+
+ /**
+ * @file playlist.js
+ *
+ * Playlist related utilities.
+ */
+ /**
+ * Get the duration of a segment, with special cases for
+ * llhls segments that do not have a duration yet.
+ *
+ * @param {Object} playlist
+ * the playlist that the segment belongs to.
+ * @param {Object} segment
+ * the segment to get a duration for.
+ *
+ * @return {number}
+ * the segment duration
+ */
+
+ const segmentDurationWithParts = (playlist, segment) => {
+ // if this isn't a preload segment
+ // then we will have a segment duration that is accurate.
+ if (!segment.preload) {
+ return segment.duration;
+ } // otherwise we have to add up parts and preload hints
+ // to get an up to date duration.
+
+ let result = 0;
+ (segment.parts || []).forEach(function (p) {
+ result += p.duration;
+ }); // for preload hints we have to use partTargetDuration
+ // as they won't even have a duration yet.
+
+ (segment.preloadHints || []).forEach(function (p) {
+ if (p.type === 'PART') {
+ result += playlist.partTargetDuration;
+ }
+ });
+ return result;
+ };
+ /**
+ * A function to get a combined list of parts and segments with durations
+ * and indexes.
+ *
+ * @param {Playlist} playlist the playlist to get the list for.
+ *
+ * @return {Array} The part/segment list.
+ */
+
+ const getPartsAndSegments = playlist => (playlist.segments || []).reduce((acc, segment, si) => {
+ if (segment.parts) {
+ segment.parts.forEach(function (part, pi) {
+ acc.push({
+ duration: part.duration,
+ segmentIndex: si,
+ partIndex: pi,
+ part,
+ segment
+ });
+ });
+ } else {
+ acc.push({
+ duration: segment.duration,
+ segmentIndex: si,
+ partIndex: null,
+ segment,
+ part: null
+ });
+ }
+ return acc;
+ }, []);
+ const getLastParts = media => {
+ const lastSegment = media.segments && media.segments.length && media.segments[media.segments.length - 1];
+ return lastSegment && lastSegment.parts || [];
+ };
+ const getKnownPartCount = ({
+ preloadSegment
+ }) => {
+ if (!preloadSegment) {
+ return;
+ }
+ const {
+ parts,
+ preloadHints
+ } = preloadSegment;
+ let partCount = (preloadHints || []).reduce((count, hint) => count + (hint.type === 'PART' ? 1 : 0), 0);
+ partCount += parts && parts.length ? parts.length : 0;
+ return partCount;
+ };
+ /**
+ * Get the number of seconds to delay from the end of a
+ * live playlist.
+ *
+ * @param {Playlist} main the main playlist
+ * @param {Playlist} media the media playlist
+ * @return {number} the hold back in seconds.
+ */
+
+ const liveEdgeDelay = (main, media) => {
+ if (media.endList) {
+ return 0;
+ } // dash suggestedPresentationDelay trumps everything
+
+ if (main && main.suggestedPresentationDelay) {
+ return main.suggestedPresentationDelay;
+ }
+ const hasParts = getLastParts(media).length > 0; // look for "part" delays from ll-hls first
+
+ if (hasParts && media.serverControl && media.serverControl.partHoldBack) {
+ return media.serverControl.partHoldBack;
+ } else if (hasParts && media.partTargetDuration) {
+ return media.partTargetDuration * 3; // finally look for full segment delays
+ } else if (media.serverControl && media.serverControl.holdBack) {
+ return media.serverControl.holdBack;
+ } else if (media.targetDuration) {
+ return media.targetDuration * 3;
+ }
+ return 0;
+ };
+ /**
+ * walk backward until we find a duration we can use
+ * or return a failure
+ *
+ * @param {Playlist} playlist the playlist to walk through
+ * @param {Number} endSequence the mediaSequence to stop walking on
+ */
+
+ const backwardDuration = function (playlist, endSequence) {
+ let result = 0;
+ let i = endSequence - playlist.mediaSequence; // if a start time is available for segment immediately following
+ // the interval, use it
+
+ let segment = playlist.segments[i]; // Walk backward until we find the latest segment with timeline
+ // information that is earlier than endSequence
+
+ if (segment) {
+ if (typeof segment.start !== 'undefined') {
+ return {
+ result: segment.start,
+ precise: true
+ };
+ }
+ if (typeof segment.end !== 'undefined') {
+ return {
+ result: segment.end - segment.duration,
+ precise: true
+ };
+ }
+ }
+ while (i--) {
+ segment = playlist.segments[i];
+ if (typeof segment.end !== 'undefined') {
+ return {
+ result: result + segment.end,
+ precise: true
+ };
+ }
+ result += segmentDurationWithParts(playlist, segment);
+ if (typeof segment.start !== 'undefined') {
+ return {
+ result: result + segment.start,
+ precise: true
+ };
+ }
+ }
+ return {
+ result,
+ precise: false
+ };
+ };
+ /**
+ * walk forward until we find a duration we can use
+ * or return a failure
+ *
+ * @param {Playlist} playlist the playlist to walk through
+ * @param {number} endSequence the mediaSequence to stop walking on
+ */
+
+ const forwardDuration = function (playlist, endSequence) {
+ let result = 0;
+ let segment;
+ let i = endSequence - playlist.mediaSequence; // Walk forward until we find the earliest segment with timeline
+ // information
+
+ for (; i < playlist.segments.length; i++) {
+ segment = playlist.segments[i];
+ if (typeof segment.start !== 'undefined') {
+ return {
+ result: segment.start - result,
+ precise: true
+ };
+ }
+ result += segmentDurationWithParts(playlist, segment);
+ if (typeof segment.end !== 'undefined') {
+ return {
+ result: segment.end - result,
+ precise: true
+ };
+ }
+ } // indicate we didn't find a useful duration estimate
+
+ return {
+ result: -1,
+ precise: false
+ };
+ };
+ /**
+ * Calculate the media duration from the segments associated with a
+ * playlist. The duration of a subinterval of the available segments
+ * may be calculated by specifying an end index.
+ *
+ * @param {Object} playlist a media playlist object
+ * @param {number=} endSequence an exclusive upper boundary
+ * for the playlist. Defaults to playlist length.
+ * @param {number} expired the amount of time that has dropped
+ * off the front of the playlist in a live scenario
+ * @return {number} the duration between the first available segment
+ * and end index.
+ */
+
+ const intervalDuration = function (playlist, endSequence, expired) {
+ if (typeof endSequence === 'undefined') {
+ endSequence = playlist.mediaSequence + playlist.segments.length;
+ }
+ if (endSequence < playlist.mediaSequence) {
+ return 0;
+ } // do a backward walk to estimate the duration
+
+ const backward = backwardDuration(playlist, endSequence);
+ if (backward.precise) {
+ // if we were able to base our duration estimate on timing
+ // information provided directly from the Media Source, return
+ // it
+ return backward.result;
+ } // walk forward to see if a precise duration estimate can be made
+ // that way
+
+ const forward = forwardDuration(playlist, endSequence);
+ if (forward.precise) {
+ // we found a segment that has been buffered and so it's
+ // position is known precisely
+ return forward.result;
+ } // return the less-precise, playlist-based duration estimate
+
+ return backward.result + expired;
+ };
+ /**
+ * Calculates the duration of a playlist. If a start and end index
+ * are specified, the duration will be for the subset of the media
+ * timeline between those two indices. The total duration for live
+ * playlists is always Infinity.
+ *
+ * @param {Object} playlist a media playlist object
+ * @param {number=} endSequence an exclusive upper
+ * boundary for the playlist. Defaults to the playlist media
+ * sequence number plus its length.
+ * @param {number=} expired the amount of time that has
+ * dropped off the front of the playlist in a live scenario
+ * @return {number} the duration between the start index and end
+ * index.
+ */
+
+ const duration = function (playlist, endSequence, expired) {
+ if (!playlist) {
+ return 0;
+ }
+ if (typeof expired !== 'number') {
+ expired = 0;
+ } // if a slice of the total duration is not requested, use
+ // playlist-level duration indicators when they're present
+
+ if (typeof endSequence === 'undefined') {
+ // if present, use the duration specified in the playlist
+ if (playlist.totalDuration) {
+ return playlist.totalDuration;
+ } // duration should be Infinity for live playlists
+
+ if (!playlist.endList) {
+ return window.Infinity;
+ }
+ } // calculate the total duration based on the segment durations
+
+ return intervalDuration(playlist, endSequence, expired);
+ };
+ /**
+ * Calculate the time between two indexes in the current playlist
+ * neight the start- nor the end-index need to be within the current
+ * playlist in which case, the targetDuration of the playlist is used
+ * to approximate the durations of the segments
+ *
+ * @param {Array} options.durationList list to iterate over for durations.
+ * @param {number} options.defaultDuration duration to use for elements before or after the durationList
+ * @param {number} options.startIndex partsAndSegments index to start
+ * @param {number} options.endIndex partsAndSegments index to end.
+ * @return {number} the number of seconds between startIndex and endIndex
+ */
+
+ const sumDurations = function ({
+ defaultDuration,
+ durationList,
+ startIndex,
+ endIndex
+ }) {
+ let durations = 0;
+ if (startIndex > endIndex) {
+ [startIndex, endIndex] = [endIndex, startIndex];
+ }
+ if (startIndex < 0) {
+ for (let i = startIndex; i < Math.min(0, endIndex); i++) {
+ durations += defaultDuration;
+ }
+ startIndex = 0;
+ }
+ for (let i = startIndex; i < endIndex; i++) {
+ durations += durationList[i].duration;
+ }
+ return durations;
+ };
+ /**
+ * Calculates the playlist end time
+ *
+ * @param {Object} playlist a media playlist object
+ * @param {number=} expired the amount of time that has
+ * dropped off the front of the playlist in a live scenario
+ * @param {boolean|false} useSafeLiveEnd a boolean value indicating whether or not the
+ * playlist end calculation should consider the safe live end
+ * (truncate the playlist end by three segments). This is normally
+ * used for calculating the end of the playlist's seekable range.
+ * This takes into account the value of liveEdgePadding.
+ * Setting liveEdgePadding to 0 is equivalent to setting this to false.
+ * @param {number} liveEdgePadding a number indicating how far from the end of the playlist we should be in seconds.
+ * If this is provided, it is used in the safe live end calculation.
+ * Setting useSafeLiveEnd=false or liveEdgePadding=0 are equivalent.
+ * Corresponds to suggestedPresentationDelay in DASH manifests.
+ * @return {number} the end time of playlist
+ * @function playlistEnd
+ */
+
+ const playlistEnd = function (playlist, expired, useSafeLiveEnd, liveEdgePadding) {
+ if (!playlist || !playlist.segments) {
+ return null;
+ }
+ if (playlist.endList) {
+ return duration(playlist);
+ }
+ if (expired === null) {
+ return null;
+ }
+ expired = expired || 0;
+ let lastSegmentEndTime = intervalDuration(playlist, playlist.mediaSequence + playlist.segments.length, expired);
+ if (useSafeLiveEnd) {
+ liveEdgePadding = typeof liveEdgePadding === 'number' ? liveEdgePadding : liveEdgeDelay(null, playlist);
+ lastSegmentEndTime -= liveEdgePadding;
+ } // don't return a time less than zero
+
+ return Math.max(0, lastSegmentEndTime);
+ };
+ /**
+ * Calculates the interval of time that is currently seekable in a
+ * playlist. The returned time ranges are relative to the earliest
+ * moment in the specified playlist that is still available. A full
+ * seekable implementation for live streams would need to offset
+ * these values by the duration of content that has expired from the
+ * stream.
+ *
+ * @param {Object} playlist a media playlist object
+ * dropped off the front of the playlist in a live scenario
+ * @param {number=} expired the amount of time that has
+ * dropped off the front of the playlist in a live scenario
+ * @param {number} liveEdgePadding how far from the end of the playlist we should be in seconds.
+ * Corresponds to suggestedPresentationDelay in DASH manifests.
+ * @return {TimeRanges} the periods of time that are valid targets
+ * for seeking
+ */
+
+ const seekable = function (playlist, expired, liveEdgePadding) {
+ const useSafeLiveEnd = true;
+ const seekableStart = expired || 0;
+ let seekableEnd = playlistEnd(playlist, expired, useSafeLiveEnd, liveEdgePadding);
+ if (seekableEnd === null) {
+ return createTimeRanges();
+ } // Clamp seekable end since it can not be less than the seekable start
+
+ if (seekableEnd < seekableStart) {
+ seekableEnd = seekableStart;
+ }
+ return createTimeRanges(seekableStart, seekableEnd);
+ };
+ /**
+ * Determine the index and estimated starting time of the segment that
+ * contains a specified playback position in a media playlist.
+ *
+ * @param {Object} options.playlist the media playlist to query
+ * @param {number} options.currentTime The number of seconds since the earliest
+ * possible position to determine the containing segment for
+ * @param {number} options.startTime the time when the segment/part starts
+ * @param {number} options.startingSegmentIndex the segment index to start looking at.
+ * @param {number?} [options.startingPartIndex] the part index to look at within the segment.
+ *
+ * @return {Object} an object with partIndex, segmentIndex, and startTime.
+ */
+
+ const getMediaInfoForTime = function ({
+ playlist,
+ currentTime,
+ startingSegmentIndex,
+ startingPartIndex,
+ startTime,
+ exactManifestTimings
+ }) {
+ let time = currentTime - startTime;
+ const partsAndSegments = getPartsAndSegments(playlist);
+ let startIndex = 0;
+ for (let i = 0; i < partsAndSegments.length; i++) {
+ const partAndSegment = partsAndSegments[i];
+ if (startingSegmentIndex !== partAndSegment.segmentIndex) {
+ continue;
+ } // skip this if part index does not match.
+
+ if (typeof startingPartIndex === 'number' && typeof partAndSegment.partIndex === 'number' && startingPartIndex !== partAndSegment.partIndex) {
+ continue;
+ }
+ startIndex = i;
+ break;
+ }
+ if (time < 0) {
+ // Walk backward from startIndex in the playlist, adding durations
+ // until we find a segment that contains `time` and return it
+ if (startIndex > 0) {
+ for (let i = startIndex - 1; i >= 0; i--) {
+ const partAndSegment = partsAndSegments[i];
+ time += partAndSegment.duration;
+ if (exactManifestTimings) {
+ if (time < 0) {
+ continue;
+ }
+ } else if (time + TIME_FUDGE_FACTOR <= 0) {
+ continue;
+ }
+ return {
+ partIndex: partAndSegment.partIndex,
+ segmentIndex: partAndSegment.segmentIndex,
+ startTime: startTime - sumDurations({
+ defaultDuration: playlist.targetDuration,
+ durationList: partsAndSegments,
+ startIndex,
+ endIndex: i
+ })
+ };
+ }
+ } // We were unable to find a good segment within the playlist
+ // so select the first segment
+
+ return {
+ partIndex: partsAndSegments[0] && partsAndSegments[0].partIndex || null,
+ segmentIndex: partsAndSegments[0] && partsAndSegments[0].segmentIndex || 0,
+ startTime: currentTime
+ };
+ } // When startIndex is negative, we first walk forward to first segment
+ // adding target durations. If we "run out of time" before getting to
+ // the first segment, return the first segment
+
+ if (startIndex < 0) {
+ for (let i = startIndex; i < 0; i++) {
+ time -= playlist.targetDuration;
+ if (time < 0) {
+ return {
+ partIndex: partsAndSegments[0] && partsAndSegments[0].partIndex || null,
+ segmentIndex: partsAndSegments[0] && partsAndSegments[0].segmentIndex || 0,
+ startTime: currentTime
+ };
+ }
+ }
+ startIndex = 0;
+ } // Walk forward from startIndex in the playlist, subtracting durations
+ // until we find a segment that contains `time` and return it
+
+ for (let i = startIndex; i < partsAndSegments.length; i++) {
+ const partAndSegment = partsAndSegments[i];
+ time -= partAndSegment.duration;
+ const canUseFudgeFactor = partAndSegment.duration > TIME_FUDGE_FACTOR;
+ const isExactlyAtTheEnd = time === 0;
+ const isExtremelyCloseToTheEnd = canUseFudgeFactor && time + TIME_FUDGE_FACTOR >= 0;
+ if (isExactlyAtTheEnd || isExtremelyCloseToTheEnd) {
+ // 1) We are exactly at the end of the current segment.
+ // 2) We are extremely close to the end of the current segment (The difference is less than 1 / 30).
+ // We may encounter this situation when
+ // we don't have exact match between segment duration info in the manifest and the actual duration of the segment
+ // For example:
+ // We appended 3 segments 10 seconds each, meaning we should have 30 sec buffered,
+ // but we the actual buffered is 29.99999
+ //
+ // In both cases:
+ // if we passed current time -> it means that we already played current segment
+ // if we passed buffered.end -> it means that this segment is already loaded and buffered
+ // we should select the next segment if we have one:
+ if (i !== partsAndSegments.length - 1) {
+ continue;
+ }
+ }
+ if (exactManifestTimings) {
+ if (time > 0) {
+ continue;
+ }
+ } else if (time - TIME_FUDGE_FACTOR >= 0) {
+ continue;
+ }
+ return {
+ partIndex: partAndSegment.partIndex,
+ segmentIndex: partAndSegment.segmentIndex,
+ startTime: startTime + sumDurations({
+ defaultDuration: playlist.targetDuration,
+ durationList: partsAndSegments,
+ startIndex,
+ endIndex: i
+ })
+ };
+ } // We are out of possible candidates so load the last one...
+
+ return {
+ segmentIndex: partsAndSegments[partsAndSegments.length - 1].segmentIndex,
+ partIndex: partsAndSegments[partsAndSegments.length - 1].partIndex,
+ startTime: currentTime
+ };
+ };
+ /**
+ * Check whether the playlist is excluded or not.
+ *
+ * @param {Object} playlist the media playlist object
+ * @return {boolean} whether the playlist is excluded or not
+ * @function isExcluded
+ */
+
+ const isExcluded = function (playlist) {
+ return playlist.excludeUntil && playlist.excludeUntil > Date.now();
+ };
+ /**
+ * Check whether the playlist is compatible with current playback configuration or has
+ * been excluded permanently for being incompatible.
+ *
+ * @param {Object} playlist the media playlist object
+ * @return {boolean} whether the playlist is incompatible or not
+ * @function isIncompatible
+ */
+
+ const isIncompatible = function (playlist) {
+ return playlist.excludeUntil && playlist.excludeUntil === Infinity;
+ };
+ /**
+ * Check whether the playlist is enabled or not.
+ *
+ * @param {Object} playlist the media playlist object
+ * @return {boolean} whether the playlist is enabled or not
+ * @function isEnabled
+ */
+
+ const isEnabled = function (playlist) {
+ const excluded = isExcluded(playlist);
+ return !playlist.disabled && !excluded;
+ };
+ /**
+ * Check whether the playlist has been manually disabled through the representations api.
+ *
+ * @param {Object} playlist the media playlist object
+ * @return {boolean} whether the playlist is disabled manually or not
+ * @function isDisabled
+ */
+
+ const isDisabled = function (playlist) {
+ return playlist.disabled;
+ };
+ /**
+ * Returns whether the current playlist is an AES encrypted HLS stream
+ *
+ * @return {boolean} true if it's an AES encrypted HLS stream
+ */
+
+ const isAes = function (media) {
+ for (let i = 0; i < media.segments.length; i++) {
+ if (media.segments[i].key) {
+ return true;
+ }
+ }
+ return false;
+ };
+ /**
+ * Checks if the playlist has a value for the specified attribute
+ *
+ * @param {string} attr
+ * Attribute to check for
+ * @param {Object} playlist
+ * The media playlist object
+ * @return {boolean}
+ * Whether the playlist contains a value for the attribute or not
+ * @function hasAttribute
+ */
+
+ const hasAttribute = function (attr, playlist) {
+ return playlist.attributes && playlist.attributes[attr];
+ };
+ /**
+ * Estimates the time required to complete a segment download from the specified playlist
+ *
+ * @param {number} segmentDuration
+ * Duration of requested segment
+ * @param {number} bandwidth
+ * Current measured bandwidth of the player
+ * @param {Object} playlist
+ * The media playlist object
+ * @param {number=} bytesReceived
+ * Number of bytes already received for the request. Defaults to 0
+ * @return {number|NaN}
+ * The estimated time to request the segment. NaN if bandwidth information for
+ * the given playlist is unavailable
+ * @function estimateSegmentRequestTime
+ */
+
+ const estimateSegmentRequestTime = function (segmentDuration, bandwidth, playlist, bytesReceived = 0) {
+ if (!hasAttribute('BANDWIDTH', playlist)) {
+ return NaN;
+ }
+ const size = segmentDuration * playlist.attributes.BANDWIDTH;
+ return (size - bytesReceived * 8) / bandwidth;
+ };
+ /*
+ * Returns whether the current playlist is the lowest rendition
+ *
+ * @return {Boolean} true if on lowest rendition
+ */
+
+ const isLowestEnabledRendition = (main, media) => {
+ if (main.playlists.length === 1) {
+ return true;
+ }
+ const currentBandwidth = media.attributes.BANDWIDTH || Number.MAX_VALUE;
+ return main.playlists.filter(playlist => {
+ if (!isEnabled(playlist)) {
+ return false;
+ }
+ return (playlist.attributes.BANDWIDTH || 0) < currentBandwidth;
+ }).length === 0;
+ };
+ const playlistMatch = (a, b) => {
+ // both playlits are null
+ // or only one playlist is non-null
+ // no match
+ if (!a && !b || !a && b || a && !b) {
+ return false;
+ } // playlist objects are the same, match
+
+ if (a === b) {
+ return true;
+ } // first try to use id as it should be the most
+ // accurate
+
+ if (a.id && b.id && a.id === b.id) {
+ return true;
+ } // next try to use reslovedUri as it should be the
+ // second most accurate.
+
+ if (a.resolvedUri && b.resolvedUri && a.resolvedUri === b.resolvedUri) {
+ return true;
+ } // finally try to use uri as it should be accurate
+ // but might miss a few cases for relative uris
+
+ if (a.uri && b.uri && a.uri === b.uri) {
+ return true;
+ }
+ return false;
+ };
+ const someAudioVariant = function (main, callback) {
+ const AUDIO = main && main.mediaGroups && main.mediaGroups.AUDIO || {};
+ let found = false;
+ for (const groupName in AUDIO) {
+ for (const label in AUDIO[groupName]) {
+ found = callback(AUDIO[groupName][label]);
+ if (found) {
+ break;
+ }
+ }
+ if (found) {
+ break;
+ }
+ }
+ return !!found;
+ };
+ const isAudioOnly = main => {
+ // we are audio only if we have no main playlists but do
+ // have media group playlists.
+ if (!main || !main.playlists || !main.playlists.length) {
+ // without audio variants or playlists this
+ // is not an audio only main.
+ const found = someAudioVariant(main, variant => variant.playlists && variant.playlists.length || variant.uri);
+ return found;
+ } // if every playlist has only an audio codec it is audio only
+
+ for (let i = 0; i < main.playlists.length; i++) {
+ const playlist = main.playlists[i];
+ const CODECS = playlist.attributes && playlist.attributes.CODECS; // all codecs are audio, this is an audio playlist.
+
+ if (CODECS && CODECS.split(',').every(c => isAudioCodec(c))) {
+ continue;
+ } // playlist is in an audio group it is audio only
+
+ const found = someAudioVariant(main, variant => playlistMatch(playlist, variant));
+ if (found) {
+ continue;
+ } // if we make it here this playlist isn't audio and we
+ // are not audio only
+
+ return false;
+ } // if we make it past every playlist without returning, then
+ // this is an audio only playlist.
+
+ return true;
+ }; // exports
+
+ var Playlist = {
+ liveEdgeDelay,
+ duration,
+ seekable,
+ getMediaInfoForTime,
+ isEnabled,
+ isDisabled,
+ isExcluded,
+ isIncompatible,
+ playlistEnd,
+ isAes,
+ hasAttribute,
+ estimateSegmentRequestTime,
+ isLowestEnabledRendition,
+ isAudioOnly,
+ playlistMatch,
+ segmentDurationWithParts
+ };
+ const {
+ log
+ } = videojs;
+ const createPlaylistID = (index, uri) => {
+ return `${index}-${uri}`;
+ }; // default function for creating a group id
+
+ const groupID = (type, group, label) => {
+ return `placeholder-uri-${type}-${group}-${label}`;
+ };
+ /**
+ * Parses a given m3u8 playlist
+ *
+ * @param {Function} [onwarn]
+ * a function to call when the parser triggers a warning event.
+ * @param {Function} [oninfo]
+ * a function to call when the parser triggers an info event.
+ * @param {string} manifestString
+ * The downloaded manifest string
+ * @param {Object[]} [customTagParsers]
+ * An array of custom tag parsers for the m3u8-parser instance
+ * @param {Object[]} [customTagMappers]
+ * An array of custom tag mappers for the m3u8-parser instance
+ * @param {boolean} [llhls]
+ * Whether to keep ll-hls features in the manifest after parsing.
+ * @return {Object}
+ * The manifest object
+ */
+
+ const parseManifest = ({
+ onwarn,
+ oninfo,
+ manifestString,
+ customTagParsers = [],
+ customTagMappers = [],
+ llhls
+ }) => {
+ const parser = new Parser();
+ if (onwarn) {
+ parser.on('warn', onwarn);
+ }
+ if (oninfo) {
+ parser.on('info', oninfo);
+ }
+ customTagParsers.forEach(customParser => parser.addParser(customParser));
+ customTagMappers.forEach(mapper => parser.addTagMapper(mapper));
+ parser.push(manifestString);
+ parser.end();
+ const manifest = parser.manifest; // remove llhls features from the parsed manifest
+ // if we don't want llhls support.
+
+ if (!llhls) {
+ ['preloadSegment', 'skip', 'serverControl', 'renditionReports', 'partInf', 'partTargetDuration'].forEach(function (k) {
+ if (manifest.hasOwnProperty(k)) {
+ delete manifest[k];
+ }
+ });
+ if (manifest.segments) {
+ manifest.segments.forEach(function (segment) {
+ ['parts', 'preloadHints'].forEach(function (k) {
+ if (segment.hasOwnProperty(k)) {
+ delete segment[k];
+ }
+ });
+ });
+ }
+ }
+ if (!manifest.targetDuration) {
+ let targetDuration = 10;
+ if (manifest.segments && manifest.segments.length) {
+ targetDuration = manifest.segments.reduce((acc, s) => Math.max(acc, s.duration), 0);
+ }
+ if (onwarn) {
+ onwarn({
+ message: `manifest has no targetDuration defaulting to ${targetDuration}`
+ });
+ }
+ manifest.targetDuration = targetDuration;
+ }
+ const parts = getLastParts(manifest);
+ if (parts.length && !manifest.partTargetDuration) {
+ const partTargetDuration = parts.reduce((acc, p) => Math.max(acc, p.duration), 0);
+ if (onwarn) {
+ onwarn({
+ message: `manifest has no partTargetDuration defaulting to ${partTargetDuration}`
+ });
+ log.error('LL-HLS manifest has parts but lacks required #EXT-X-PART-INF:PART-TARGET value. See https://datatracker.ietf.org/doc/html/draft-pantos-hls-rfc8216bis-09#section-4.4.3.7. Playback is not guaranteed.');
+ }
+ manifest.partTargetDuration = partTargetDuration;
+ }
+ return manifest;
+ };
+ /**
+ * Loops through all supported media groups in main and calls the provided
+ * callback for each group
+ *
+ * @param {Object} main
+ * The parsed main manifest object
+ * @param {Function} callback
+ * Callback to call for each media group
+ */
+
+ const forEachMediaGroup = (main, callback) => {
+ if (!main.mediaGroups) {
+ return;
+ }
+ ['AUDIO', 'SUBTITLES'].forEach(mediaType => {
+ if (!main.mediaGroups[mediaType]) {
+ return;
+ }
+ for (const groupKey in main.mediaGroups[mediaType]) {
+ for (const labelKey in main.mediaGroups[mediaType][groupKey]) {
+ const mediaProperties = main.mediaGroups[mediaType][groupKey][labelKey];
+ callback(mediaProperties, mediaType, groupKey, labelKey);
+ }
+ }
+ });
+ };
+ /**
+ * Adds properties and attributes to the playlist to keep consistent functionality for
+ * playlists throughout VHS.
+ *
+ * @param {Object} config
+ * Arguments object
+ * @param {Object} config.playlist
+ * The media playlist
+ * @param {string} [config.uri]
+ * The uri to the media playlist (if media playlist is not from within a main
+ * playlist)
+ * @param {string} id
+ * ID to use for the playlist
+ */
+
+ const setupMediaPlaylist = ({
+ playlist,
+ uri,
+ id
+ }) => {
+ playlist.id = id;
+ playlist.playlistErrors_ = 0;
+ if (uri) {
+ // For media playlists, m3u8-parser does not have access to a URI, as HLS media
+ // playlists do not contain their own source URI, but one is needed for consistency in
+ // VHS.
+ playlist.uri = uri;
+ } // For HLS main playlists, even though certain attributes MUST be defined, the
+ // stream may still be played without them.
+ // For HLS media playlists, m3u8-parser does not attach an attributes object to the
+ // manifest.
+ //
+ // To avoid undefined reference errors through the project, and make the code easier
+ // to write/read, add an empty attributes object for these cases.
+
+ playlist.attributes = playlist.attributes || {};
+ };
+ /**
+ * Adds ID, resolvedUri, and attributes properties to each playlist of the main, where
+ * necessary. In addition, creates playlist IDs for each playlist and adds playlist ID to
+ * playlist references to the playlists array.
+ *
+ * @param {Object} main
+ * The main playlist
+ */
+
+ const setupMediaPlaylists = main => {
+ let i = main.playlists.length;
+ while (i--) {
+ const playlist = main.playlists[i];
+ setupMediaPlaylist({
+ playlist,
+ id: createPlaylistID(i, playlist.uri)
+ });
+ playlist.resolvedUri = resolveUrl(main.uri, playlist.uri);
+ main.playlists[playlist.id] = playlist; // URI reference added for backwards compatibility
+
+ main.playlists[playlist.uri] = playlist; // Although the spec states an #EXT-X-STREAM-INF tag MUST have a BANDWIDTH attribute,
+ // the stream can be played without it. Although an attributes property may have been
+ // added to the playlist to prevent undefined references, issue a warning to fix the
+ // manifest.
+
+ if (!playlist.attributes.BANDWIDTH) {
+ log.warn('Invalid playlist STREAM-INF detected. Missing BANDWIDTH attribute.');
+ }
+ }
+ };
+ /**
+ * Adds resolvedUri properties to each media group.
+ *
+ * @param {Object} main
+ * The main playlist
+ */
+
+ const resolveMediaGroupUris = main => {
+ forEachMediaGroup(main, properties => {
+ if (properties.uri) {
+ properties.resolvedUri = resolveUrl(main.uri, properties.uri);
+ }
+ });
+ };
+ /**
+ * Creates a main playlist wrapper to insert a sole media playlist into.
+ *
+ * @param {Object} media
+ * Media playlist
+ * @param {string} uri
+ * The media URI
+ *
+ * @return {Object}
+ * main playlist
+ */
+
+ const mainForMedia = (media, uri) => {
+ const id = createPlaylistID(0, uri);
+ const main = {
+ mediaGroups: {
+ 'AUDIO': {},
+ 'VIDEO': {},
+ 'CLOSED-CAPTIONS': {},
+ 'SUBTITLES': {}
+ },
+ uri: window.location.href,
+ resolvedUri: window.location.href,
+ playlists: [{
+ uri,
+ id,
+ resolvedUri: uri,
+ // m3u8-parser does not attach an attributes property to media playlists so make
+ // sure that the property is attached to avoid undefined reference errors
+ attributes: {}
+ }]
+ }; // set up ID reference
+
+ main.playlists[id] = main.playlists[0]; // URI reference added for backwards compatibility
+
+ main.playlists[uri] = main.playlists[0];
+ return main;
+ };
+ /**
+ * Does an in-place update of the main manifest to add updated playlist URI references
+ * as well as other properties needed by VHS that aren't included by the parser.
+ *
+ * @param {Object} main
+ * main manifest object
+ * @param {string} uri
+ * The source URI
+ * @param {function} createGroupID
+ * A function to determine how to create the groupID for mediaGroups
+ */
+
+ const addPropertiesToMain = (main, uri, createGroupID = groupID) => {
+ main.uri = uri;
+ for (let i = 0; i < main.playlists.length; i++) {
+ if (!main.playlists[i].uri) {
+ // Set up phony URIs for the playlists since playlists are referenced by their URIs
+ // throughout VHS, but some formats (e.g., DASH) don't have external URIs
+ // TODO: consider adding dummy URIs in mpd-parser
+ const phonyUri = `placeholder-uri-${i}`;
+ main.playlists[i].uri = phonyUri;
+ }
+ }
+ const audioOnlyMain = isAudioOnly(main);
+ forEachMediaGroup(main, (properties, mediaType, groupKey, labelKey) => {
+ // add a playlist array under properties
+ if (!properties.playlists || !properties.playlists.length) {
+ // If the manifest is audio only and this media group does not have a uri, check
+ // if the media group is located in the main list of playlists. If it is, don't add
+ // placeholder properties as it shouldn't be considered an alternate audio track.
+ if (audioOnlyMain && mediaType === 'AUDIO' && !properties.uri) {
+ for (let i = 0; i < main.playlists.length; i++) {
+ const p = main.playlists[i];
+ if (p.attributes && p.attributes.AUDIO && p.attributes.AUDIO === groupKey) {
+ return;
+ }
+ }
+ }
+ properties.playlists = [_extends$1({}, properties)];
+ }
+ properties.playlists.forEach(function (p, i) {
+ const groupId = createGroupID(mediaType, groupKey, labelKey, p);
+ const id = createPlaylistID(i, groupId);
+ if (p.uri) {
+ p.resolvedUri = p.resolvedUri || resolveUrl(main.uri, p.uri);
+ } else {
+ // DEPRECATED, this has been added to prevent a breaking change.
+ // previously we only ever had a single media group playlist, so
+ // we mark the first playlist uri without prepending the index as we used to
+ // ideally we would do all of the playlists the same way.
+ p.uri = i === 0 ? groupId : id; // don't resolve a placeholder uri to an absolute url, just use
+ // the placeholder again
+
+ p.resolvedUri = p.uri;
+ }
+ p.id = p.id || id; // add an empty attributes object, all playlists are
+ // expected to have this.
+
+ p.attributes = p.attributes || {}; // setup ID and URI references (URI for backwards compatibility)
+
+ main.playlists[p.id] = p;
+ main.playlists[p.uri] = p;
+ });
+ });
+ setupMediaPlaylists(main);
+ resolveMediaGroupUris(main);
+ };
+ class DateRangesStorage {
+ constructor() {
+ this.offset_ = null;
+ this.pendingDateRanges_ = new Map();
+ this.processedDateRanges_ = new Map();
+ }
+ setOffset(segments = []) {
+ // already set
+ if (this.offset_ !== null) {
+ return;
+ } // no segment to process
+
+ if (!segments.length) {
+ return;
+ }
+ const [firstSegment] = segments; // no program date time
+
+ if (firstSegment.programDateTime === undefined) {
+ return;
+ } // Set offset as ProgramDateTime for the very first segment of the very first playlist load:
+
+ this.offset_ = firstSegment.programDateTime / 1000;
+ }
+ setPendingDateRanges(dateRanges = []) {
+ if (!dateRanges.length) {
+ return;
+ }
+ const [dateRange] = dateRanges;
+ const startTime = dateRange.startDate.getTime();
+ this.trimProcessedDateRanges_(startTime);
+ this.pendingDateRanges_ = dateRanges.reduce((map, pendingDateRange) => {
+ map.set(pendingDateRange.id, pendingDateRange);
+ return map;
+ }, new Map());
+ }
+ processDateRange(dateRange) {
+ this.pendingDateRanges_.delete(dateRange.id);
+ this.processedDateRanges_.set(dateRange.id, dateRange);
+ }
+ getDateRangesToProcess() {
+ if (this.offset_ === null) {
+ return [];
+ }
+ const dateRangeClasses = {};
+ const dateRangesToProcess = [];
+ this.pendingDateRanges_.forEach((dateRange, id) => {
+ if (this.processedDateRanges_.has(id)) {
+ return;
+ }
+ dateRange.startTime = dateRange.startDate.getTime() / 1000 - this.offset_;
+ dateRange.processDateRange = () => this.processDateRange(dateRange);
+ dateRangesToProcess.push(dateRange);
+ if (!dateRange.class) {
+ return;
+ }
+ if (dateRangeClasses[dateRange.class]) {
+ const length = dateRangeClasses[dateRange.class].push(dateRange);
+ dateRange.classListIndex = length - 1;
+ } else {
+ dateRangeClasses[dateRange.class] = [dateRange];
+ dateRange.classListIndex = 0;
+ }
+ });
+ for (const dateRange of dateRangesToProcess) {
+ const classList = dateRangeClasses[dateRange.class] || [];
+ if (dateRange.endDate) {
+ dateRange.endTime = dateRange.endDate.getTime() / 1000 - this.offset_;
+ } else if (dateRange.endOnNext && classList[dateRange.classListIndex + 1]) {
+ dateRange.endTime = classList[dateRange.classListIndex + 1].startTime;
+ } else if (dateRange.duration) {
+ dateRange.endTime = dateRange.startTime + dateRange.duration;
+ } else if (dateRange.plannedDuration) {
+ dateRange.endTime = dateRange.startTime + dateRange.plannedDuration;
+ } else {
+ dateRange.endTime = dateRange.startTime;
+ }
+ }
+ return dateRangesToProcess;
+ }
+ trimProcessedDateRanges_(startTime) {
+ const copy = new Map(this.processedDateRanges_);
+ copy.forEach((dateRange, id) => {
+ if (dateRange.startDate.getTime() < startTime) {
+ this.processedDateRanges_.delete(id);
+ }
+ });
+ }
+ }
+ const {
+ EventTarget: EventTarget$1
+ } = videojs;
+ const addLLHLSQueryDirectives = (uri, media) => {
+ if (media.endList || !media.serverControl) {
+ return uri;
+ }
+ const parameters = {};
+ if (media.serverControl.canBlockReload) {
+ const {
+ preloadSegment
+ } = media; // next msn is a zero based value, length is not.
+
+ let nextMSN = media.mediaSequence + media.segments.length; // If preload segment has parts then it is likely
+ // that we are going to request a part of that preload segment.
+ // the logic below is used to determine that.
+
+ if (preloadSegment) {
+ const parts = preloadSegment.parts || []; // _HLS_part is a zero based index
+
+ const nextPart = getKnownPartCount(media) - 1; // if nextPart is > -1 and not equal to just the
+ // length of parts, then we know we had part preload hints
+ // and we need to add the _HLS_part= query
+
+ if (nextPart > -1 && nextPart !== parts.length - 1) {
+ // add existing parts to our preload hints
+ // eslint-disable-next-line
+ parameters._HLS_part = nextPart;
+ } // this if statement makes sure that we request the msn
+ // of the preload segment if:
+ // 1. the preload segment had parts (and was not yet a full segment)
+ // but was added to our segments array
+ // 2. the preload segment had preload hints for parts that are not in
+ // the manifest yet.
+ // in all other cases we want the segment after the preload segment
+ // which will be given by using media.segments.length because it is 1 based
+ // rather than 0 based.
+
+ if (nextPart > -1 || parts.length) {
+ nextMSN--;
+ }
+ } // add _HLS_msn= in front of any _HLS_part query
+ // eslint-disable-next-line
+
+ parameters._HLS_msn = nextMSN;
+ }
+ if (media.serverControl && media.serverControl.canSkipUntil) {
+ // add _HLS_skip= infront of all other queries.
+ // eslint-disable-next-line
+ parameters._HLS_skip = media.serverControl.canSkipDateranges ? 'v2' : 'YES';
+ }
+ if (Object.keys(parameters).length) {
+ const parsedUri = new window.URL(uri);
+ ['_HLS_skip', '_HLS_msn', '_HLS_part'].forEach(function (name) {
+ if (!parameters.hasOwnProperty(name)) {
+ return;
+ }
+ parsedUri.searchParams.set(name, parameters[name]);
+ });
+ uri = parsedUri.toString();
+ }
+ return uri;
+ };
+ /**
+ * Returns a new segment object with properties and
+ * the parts array merged.
+ *
+ * @param {Object} a the old segment
+ * @param {Object} b the new segment
+ *
+ * @return {Object} the merged segment
+ */
+
+ const updateSegment = (a, b) => {
+ if (!a) {
+ return b;
+ }
+ const result = merge(a, b); // if only the old segment has preload hints
+ // and the new one does not, remove preload hints.
+
+ if (a.preloadHints && !b.preloadHints) {
+ delete result.preloadHints;
+ } // if only the old segment has parts
+ // then the parts are no longer valid
+
+ if (a.parts && !b.parts) {
+ delete result.parts; // if both segments have parts
+ // copy part propeties from the old segment
+ // to the new one.
+ } else if (a.parts && b.parts) {
+ for (let i = 0; i < b.parts.length; i++) {
+ if (a.parts && a.parts[i]) {
+ result.parts[i] = merge(a.parts[i], b.parts[i]);
+ }
+ }
+ } // set skipped to false for segments that have
+ // have had information merged from the old segment.
+
+ if (!a.skipped && b.skipped) {
+ result.skipped = false;
+ } // set preload to false for segments that have
+ // had information added in the new segment.
+
+ if (a.preload && !b.preload) {
+ result.preload = false;
+ }
+ return result;
+ };
+ /**
+ * Returns a new array of segments that is the result of merging
+ * properties from an older list of segments onto an updated
+ * list. No properties on the updated playlist will be ovewritten.
+ *
+ * @param {Array} original the outdated list of segments
+ * @param {Array} update the updated list of segments
+ * @param {number=} offset the index of the first update
+ * segment in the original segment list. For non-live playlists,
+ * this should always be zero and does not need to be
+ * specified. For live playlists, it should be the difference
+ * between the media sequence numbers in the original and updated
+ * playlists.
+ * @return {Array} a list of merged segment objects
+ */
+
+ const updateSegments = (original, update, offset) => {
+ const oldSegments = original.slice();
+ const newSegments = update.slice();
+ offset = offset || 0;
+ const result = [];
+ let currentMap;
+ for (let newIndex = 0; newIndex < newSegments.length; newIndex++) {
+ const oldSegment = oldSegments[newIndex + offset];
+ const newSegment = newSegments[newIndex];
+ if (oldSegment) {
+ currentMap = oldSegment.map || currentMap;
+ result.push(updateSegment(oldSegment, newSegment));
+ } else {
+ // carry over map to new segment if it is missing
+ if (currentMap && !newSegment.map) {
+ newSegment.map = currentMap;
+ }
+ result.push(newSegment);
+ }
+ }
+ return result;
+ };
+ const resolveSegmentUris = (segment, baseUri) => {
+ // preloadSegment will not have a uri at all
+ // as the segment isn't actually in the manifest yet, only parts
+ if (!segment.resolvedUri && segment.uri) {
+ segment.resolvedUri = resolveUrl(baseUri, segment.uri);
+ }
+ if (segment.key && !segment.key.resolvedUri) {
+ segment.key.resolvedUri = resolveUrl(baseUri, segment.key.uri);
+ }
+ if (segment.map && !segment.map.resolvedUri) {
+ segment.map.resolvedUri = resolveUrl(baseUri, segment.map.uri);
+ }
+ if (segment.map && segment.map.key && !segment.map.key.resolvedUri) {
+ segment.map.key.resolvedUri = resolveUrl(baseUri, segment.map.key.uri);
+ }
+ if (segment.parts && segment.parts.length) {
+ segment.parts.forEach(p => {
+ if (p.resolvedUri) {
+ return;
+ }
+ p.resolvedUri = resolveUrl(baseUri, p.uri);
+ });
+ }
+ if (segment.preloadHints && segment.preloadHints.length) {
+ segment.preloadHints.forEach(p => {
+ if (p.resolvedUri) {
+ return;
+ }
+ p.resolvedUri = resolveUrl(baseUri, p.uri);
+ });
+ }
+ };
+ const getAllSegments = function (media) {
+ const segments = media.segments || [];
+ const preloadSegment = media.preloadSegment; // a preloadSegment with only preloadHints is not currently
+ // a usable segment, only include a preloadSegment that has
+ // parts.
+
+ if (preloadSegment && preloadSegment.parts && preloadSegment.parts.length) {
+ // if preloadHints has a MAP that means that the
+ // init segment is going to change. We cannot use any of the parts
+ // from this preload segment.
+ if (preloadSegment.preloadHints) {
+ for (let i = 0; i < preloadSegment.preloadHints.length; i++) {
+ if (preloadSegment.preloadHints[i].type === 'MAP') {
+ return segments;
+ }
+ }
+ } // set the duration for our preload segment to target duration.
+
+ preloadSegment.duration = media.targetDuration;
+ preloadSegment.preload = true;
+ segments.push(preloadSegment);
+ }
+ return segments;
+ }; // consider the playlist unchanged if the playlist object is the same or
+ // the number of segments is equal, the media sequence number is unchanged,
+ // and this playlist hasn't become the end of the playlist
+
+ const isPlaylistUnchanged = (a, b) => a === b || a.segments && b.segments && a.segments.length === b.segments.length && a.endList === b.endList && a.mediaSequence === b.mediaSequence && a.preloadSegment === b.preloadSegment;
+ /**
+ * Returns a new main playlist that is the result of merging an
+ * updated media playlist into the original version. If the
+ * updated media playlist does not match any of the playlist
+ * entries in the original main playlist, null is returned.
+ *
+ * @param {Object} main a parsed main M3U8 object
+ * @param {Object} media a parsed media M3U8 object
+ * @return {Object} a new object that represents the original
+ * main playlist with the updated media playlist merged in, or
+ * null if the merge produced no change.
+ */
+
+ const updateMain$1 = (main, newMedia, unchangedCheck = isPlaylistUnchanged) => {
+ const result = merge(main, {});
+ const oldMedia = result.playlists[newMedia.id];
+ if (!oldMedia) {
+ return null;
+ }
+ if (unchangedCheck(oldMedia, newMedia)) {
+ return null;
+ }
+ newMedia.segments = getAllSegments(newMedia);
+ const mergedPlaylist = merge(oldMedia, newMedia); // always use the new media's preload segment
+
+ if (mergedPlaylist.preloadSegment && !newMedia.preloadSegment) {
+ delete mergedPlaylist.preloadSegment;
+ } // if the update could overlap existing segment information, merge the two segment lists
+
+ if (oldMedia.segments) {
+ if (newMedia.skip) {
+ newMedia.segments = newMedia.segments || []; // add back in objects for skipped segments, so that we merge
+ // old properties into the new segments
+
+ for (let i = 0; i < newMedia.skip.skippedSegments; i++) {
+ newMedia.segments.unshift({
+ skipped: true
+ });
+ }
+ }
+ mergedPlaylist.segments = updateSegments(oldMedia.segments, newMedia.segments, newMedia.mediaSequence - oldMedia.mediaSequence);
+ } // resolve any segment URIs to prevent us from having to do it later
+
+ mergedPlaylist.segments.forEach(segment => {
+ resolveSegmentUris(segment, mergedPlaylist.resolvedUri);
+ }); // TODO Right now in the playlists array there are two references to each playlist, one
+ // that is referenced by index, and one by URI. The index reference may no longer be
+ // necessary.
+
+ for (let i = 0; i < result.playlists.length; i++) {
+ if (result.playlists[i].id === newMedia.id) {
+ result.playlists[i] = mergedPlaylist;
+ }
+ }
+ result.playlists[newMedia.id] = mergedPlaylist; // URI reference added for backwards compatibility
+
+ result.playlists[newMedia.uri] = mergedPlaylist; // update media group playlist references.
+
+ forEachMediaGroup(main, (properties, mediaType, groupKey, labelKey) => {
+ if (!properties.playlists) {
+ return;
+ }
+ for (let i = 0; i < properties.playlists.length; i++) {
+ if (newMedia.id === properties.playlists[i].id) {
+ properties.playlists[i] = mergedPlaylist;
+ }
+ }
+ });
+ return result;
+ };
+ /**
+ * Calculates the time to wait before refreshing a live playlist
+ *
+ * @param {Object} media
+ * The current media
+ * @param {boolean} update
+ * True if there were any updates from the last refresh, false otherwise
+ * @return {number}
+ * The time in ms to wait before refreshing the live playlist
+ */
+
+ const refreshDelay = (media, update) => {
+ const segments = media.segments || [];
+ const lastSegment = segments[segments.length - 1];
+ const lastPart = lastSegment && lastSegment.parts && lastSegment.parts[lastSegment.parts.length - 1];
+ const lastDuration = lastPart && lastPart.duration || lastSegment && lastSegment.duration;
+ if (update && lastDuration) {
+ return lastDuration * 1000;
+ } // if the playlist is unchanged since the last reload or last segment duration
+ // cannot be determined, try again after half the target duration
+
+ return (media.partTargetDuration || media.targetDuration || 10) * 500;
+ };
+ /**
+ * Load a playlist from a remote location
+ *
+ * @class PlaylistLoader
+ * @extends Stream
+ * @param {string|Object} src url or object of manifest
+ * @param {boolean} withCredentials the withCredentials xhr option
+ * @class
+ */
+
+ class PlaylistLoader extends EventTarget$1 {
+ constructor(src, vhs, options = {}) {
+ super();
+ if (!src) {
+ throw new Error('A non-empty playlist URL or object is required');
+ }
+ this.logger_ = logger('PlaylistLoader');
+ const {
+ withCredentials = false
+ } = options;
+ this.src = src;
+ this.vhs_ = vhs;
+ this.withCredentials = withCredentials;
+ this.addDateRangesToTextTrack_ = options.addDateRangesToTextTrack;
+ const vhsOptions = vhs.options_;
+ this.customTagParsers = vhsOptions && vhsOptions.customTagParsers || [];
+ this.customTagMappers = vhsOptions && vhsOptions.customTagMappers || [];
+ this.llhls = vhsOptions && vhsOptions.llhls;
+ this.dateRangesStorage_ = new DateRangesStorage(); // initialize the loader state
+
+ this.state = 'HAVE_NOTHING'; // live playlist staleness timeout
+
+ this.handleMediaupdatetimeout_ = this.handleMediaupdatetimeout_.bind(this);
+ this.on('mediaupdatetimeout', this.handleMediaupdatetimeout_);
+ this.on('loadedplaylist', this.handleLoadedPlaylist_.bind(this));
+ }
+ handleLoadedPlaylist_() {
+ const mediaPlaylist = this.media();
+ if (!mediaPlaylist) {
+ return;
+ }
+ this.dateRangesStorage_.setOffset(mediaPlaylist.segments);
+ this.dateRangesStorage_.setPendingDateRanges(mediaPlaylist.dateRanges);
+ const availableDateRanges = this.dateRangesStorage_.getDateRangesToProcess();
+ if (!availableDateRanges.length || !this.addDateRangesToTextTrack_) {
+ return;
+ }
+ this.addDateRangesToTextTrack_(availableDateRanges);
+ }
+ handleMediaupdatetimeout_() {
+ if (this.state !== 'HAVE_METADATA') {
+ // only refresh the media playlist if no other activity is going on
+ return;
+ }
+ const media = this.media();
+ let uri = resolveUrl(this.main.uri, media.uri);
+ if (this.llhls) {
+ uri = addLLHLSQueryDirectives(uri, media);
+ }
+ this.state = 'HAVE_CURRENT_METADATA';
+ this.request = this.vhs_.xhr({
+ uri,
+ withCredentials: this.withCredentials,
+ requestType: 'hls-playlist'
+ }, (error, req) => {
+ // disposed
+ if (!this.request) {
+ return;
+ }
+ if (error) {
+ return this.playlistRequestError(this.request, this.media(), 'HAVE_METADATA');
+ }
+ this.haveMetadata({
+ playlistString: this.request.responseText,
+ url: this.media().uri,
+ id: this.media().id
+ });
+ });
+ }
+ playlistRequestError(xhr, playlist, startingState) {
+ const {
+ uri,
+ id
+ } = playlist; // any in-flight request is now finished
+
+ this.request = null;
+ if (startingState) {
+ this.state = startingState;
+ }
+ this.error = {
+ playlist: this.main.playlists[id],
+ status: xhr.status,
+ message: `HLS playlist request error at URL: ${uri}.`,
+ responseText: xhr.responseText,
+ code: xhr.status >= 500 ? 4 : 2,
+ metadata: {
+ errorType: videojs.Error.HlsPlaylistRequestError
+ }
+ };
+ this.trigger('error');
+ }
+ parseManifest_({
+ url,
+ manifestString
+ }) {
+ return parseManifest({
+ onwarn: ({
+ message
+ }) => this.logger_(`m3u8-parser warn for ${url}: ${message}`),
+ oninfo: ({
+ message
+ }) => this.logger_(`m3u8-parser info for ${url}: ${message}`),
+ manifestString,
+ customTagParsers: this.customTagParsers,
+ customTagMappers: this.customTagMappers,
+ llhls: this.llhls
+ });
+ }
+ /**
+ * Update the playlist loader's state in response to a new or updated playlist.
+ *
+ * @param {string} [playlistString]
+ * Playlist string (if playlistObject is not provided)
+ * @param {Object} [playlistObject]
+ * Playlist object (if playlistString is not provided)
+ * @param {string} url
+ * URL of playlist
+ * @param {string} id
+ * ID to use for playlist
+ */
+
+ haveMetadata({
+ playlistString,
+ playlistObject,
+ url,
+ id
+ }) {
+ // any in-flight request is now finished
+ this.request = null;
+ this.state = 'HAVE_METADATA';
+ const playlist = playlistObject || this.parseManifest_({
+ url,
+ manifestString: playlistString
+ });
+ playlist.lastRequest = Date.now();
+ setupMediaPlaylist({
+ playlist,
+ uri: url,
+ id
+ }); // merge this playlist into the main manifest
+
+ const update = updateMain$1(this.main, playlist);
+ this.targetDuration = playlist.partTargetDuration || playlist.targetDuration;
+ this.pendingMedia_ = null;
+ if (update) {
+ this.main = update;
+ this.media_ = this.main.playlists[id];
+ } else {
+ this.trigger('playlistunchanged');
+ }
+ this.updateMediaUpdateTimeout_(refreshDelay(this.media(), !!update));
+ this.trigger('loadedplaylist');
+ }
+ /**
+ * Abort any outstanding work and clean up.
+ */
+
+ dispose() {
+ this.trigger('dispose');
+ this.stopRequest();
+ window.clearTimeout(this.mediaUpdateTimeout);
+ window.clearTimeout(this.finalRenditionTimeout);
+ this.dateRangesStorage_ = new DateRangesStorage();
+ this.off();
+ }
+ stopRequest() {
+ if (this.request) {
+ const oldRequest = this.request;
+ this.request = null;
+ oldRequest.onreadystatechange = null;
+ oldRequest.abort();
+ }
+ }
+ /**
+ * When called without any arguments, returns the currently
+ * active media playlist. When called with a single argument,
+ * triggers the playlist loader to asynchronously switch to the
+ * specified media playlist. Calling this method while the
+ * loader is in the HAVE_NOTHING causes an error to be emitted
+ * but otherwise has no effect.
+ *
+ * @param {Object=} playlist the parsed media playlist
+ * object to switch to
+ * @param {boolean=} shouldDelay whether we should delay the request by half target duration
+ *
+ * @return {Playlist} the current loaded media
+ */
+
+ media(playlist, shouldDelay) {
+ // getter
+ if (!playlist) {
+ return this.media_;
+ } // setter
+
+ if (this.state === 'HAVE_NOTHING') {
+ throw new Error('Cannot switch media playlist from ' + this.state);
+ } // find the playlist object if the target playlist has been
+ // specified by URI
+
+ if (typeof playlist === 'string') {
+ if (!this.main.playlists[playlist]) {
+ throw new Error('Unknown playlist URI: ' + playlist);
+ }
+ playlist = this.main.playlists[playlist];
+ }
+ window.clearTimeout(this.finalRenditionTimeout);
+ if (shouldDelay) {
+ const delay = (playlist.partTargetDuration || playlist.targetDuration) / 2 * 1000 || 5 * 1000;
+ this.finalRenditionTimeout = window.setTimeout(this.media.bind(this, playlist, false), delay);
+ return;
+ }
+ const startingState = this.state;
+ const mediaChange = !this.media_ || playlist.id !== this.media_.id;
+ const mainPlaylistRef = this.main.playlists[playlist.id]; // switch to fully loaded playlists immediately
+
+ if (mainPlaylistRef && mainPlaylistRef.endList ||
+ // handle the case of a playlist object (e.g., if using vhs-json with a resolved
+ // media playlist or, for the case of demuxed audio, a resolved audio media group)
+ playlist.endList && playlist.segments.length) {
+ // abort outstanding playlist requests
+ if (this.request) {
+ this.request.onreadystatechange = null;
+ this.request.abort();
+ this.request = null;
+ }
+ this.state = 'HAVE_METADATA';
+ this.media_ = playlist; // trigger media change if the active media has been updated
+
+ if (mediaChange) {
+ this.trigger('mediachanging');
+ if (startingState === 'HAVE_MAIN_MANIFEST') {
+ // The initial playlist was a main manifest, and the first media selected was
+ // also provided (in the form of a resolved playlist object) as part of the
+ // source object (rather than just a URL). Therefore, since the media playlist
+ // doesn't need to be requested, loadedmetadata won't trigger as part of the
+ // normal flow, and needs an explicit trigger here.
+ this.trigger('loadedmetadata');
+ } else {
+ this.trigger('mediachange');
+ }
+ }
+ return;
+ } // We update/set the timeout here so that live playlists
+ // that are not a media change will "start" the loader as expected.
+ // We expect that this function will start the media update timeout
+ // cycle again. This also prevents a playlist switch failure from
+ // causing us to stall during live.
+
+ this.updateMediaUpdateTimeout_(refreshDelay(playlist, true)); // switching to the active playlist is a no-op
+
+ if (!mediaChange) {
+ return;
+ }
+ this.state = 'SWITCHING_MEDIA'; // there is already an outstanding playlist request
+
+ if (this.request) {
+ if (playlist.resolvedUri === this.request.url) {
+ // requesting to switch to the same playlist multiple times
+ // has no effect after the first
+ return;
+ }
+ this.request.onreadystatechange = null;
+ this.request.abort();
+ this.request = null;
+ } // request the new playlist
+
+ if (this.media_) {
+ this.trigger('mediachanging');
+ }
+ this.pendingMedia_ = playlist;
+ this.request = this.vhs_.xhr({
+ uri: playlist.resolvedUri,
+ withCredentials: this.withCredentials,
+ requestType: 'hls-playlist'
+ }, (error, req) => {
+ // disposed
+ if (!this.request) {
+ return;
+ }
+ playlist.lastRequest = Date.now();
+ playlist.resolvedUri = resolveManifestRedirect(playlist.resolvedUri, req);
+ if (error) {
+ return this.playlistRequestError(this.request, playlist, startingState);
+ }
+ this.haveMetadata({
+ playlistString: req.responseText,
+ url: playlist.uri,
+ id: playlist.id
+ }); // fire loadedmetadata the first time a media playlist is loaded
+
+ if (startingState === 'HAVE_MAIN_MANIFEST') {
+ this.trigger('loadedmetadata');
+ } else {
+ this.trigger('mediachange');
+ }
+ });
+ }
+ /**
+ * pause loading of the playlist
+ */
+
+ pause() {
+ if (this.mediaUpdateTimeout) {
+ window.clearTimeout(this.mediaUpdateTimeout);
+ this.mediaUpdateTimeout = null;
+ }
+ this.stopRequest();
+ if (this.state === 'HAVE_NOTHING') {
+ // If we pause the loader before any data has been retrieved, its as if we never
+ // started, so reset to an unstarted state.
+ this.started = false;
+ } // Need to restore state now that no activity is happening
+
+ if (this.state === 'SWITCHING_MEDIA') {
+ // if the loader was in the process of switching media, it should either return to
+ // HAVE_MAIN_MANIFEST or HAVE_METADATA depending on if the loader has loaded a media
+ // playlist yet. This is determined by the existence of loader.media_
+ if (this.media_) {
+ this.state = 'HAVE_METADATA';
+ } else {
+ this.state = 'HAVE_MAIN_MANIFEST';
+ }
+ } else if (this.state === 'HAVE_CURRENT_METADATA') {
+ this.state = 'HAVE_METADATA';
+ }
+ }
+ /**
+ * start loading of the playlist
+ */
+
+ load(shouldDelay) {
+ if (this.mediaUpdateTimeout) {
+ window.clearTimeout(this.mediaUpdateTimeout);
+ this.mediaUpdateTimeout = null;
+ }
+ const media = this.media();
+ if (shouldDelay) {
+ const delay = media ? (media.partTargetDuration || media.targetDuration) / 2 * 1000 : 5 * 1000;
+ this.mediaUpdateTimeout = window.setTimeout(() => {
+ this.mediaUpdateTimeout = null;
+ this.load();
+ }, delay);
+ return;
+ }
+ if (!this.started) {
+ this.start();
+ return;
+ }
+ if (media && !media.endList) {
+ this.trigger('mediaupdatetimeout');
+ } else {
+ this.trigger('loadedplaylist');
+ }
+ }
+ updateMediaUpdateTimeout_(delay) {
+ if (this.mediaUpdateTimeout) {
+ window.clearTimeout(this.mediaUpdateTimeout);
+ this.mediaUpdateTimeout = null;
+ } // we only have use mediaupdatetimeout for live playlists.
+
+ if (!this.media() || this.media().endList) {
+ return;
+ }
+ this.mediaUpdateTimeout = window.setTimeout(() => {
+ this.mediaUpdateTimeout = null;
+ this.trigger('mediaupdatetimeout');
+ this.updateMediaUpdateTimeout_(delay);
+ }, delay);
+ }
+ /**
+ * start loading of the playlist
+ */
+
+ start() {
+ this.started = true;
+ if (typeof this.src === 'object') {
+ // in the case of an entirely constructed manifest object (meaning there's no actual
+ // manifest on a server), default the uri to the page's href
+ if (!this.src.uri) {
+ this.src.uri = window.location.href;
+ } // resolvedUri is added on internally after the initial request. Since there's no
+ // request for pre-resolved manifests, add on resolvedUri here.
+
+ this.src.resolvedUri = this.src.uri; // Since a manifest object was passed in as the source (instead of a URL), the first
+ // request can be skipped (since the top level of the manifest, at a minimum, is
+ // already available as a parsed manifest object). However, if the manifest object
+ // represents a main playlist, some media playlists may need to be resolved before
+ // the starting segment list is available. Therefore, go directly to setup of the
+ // initial playlist, and let the normal flow continue from there.
+ //
+ // Note that the call to setup is asynchronous, as other sections of VHS may assume
+ // that the first request is asynchronous.
+
+ setTimeout(() => {
+ this.setupInitialPlaylist(this.src);
+ }, 0);
+ return;
+ } // request the specified URL
+
+ this.request = this.vhs_.xhr({
+ uri: this.src,
+ withCredentials: this.withCredentials,
+ requestType: 'hls-playlist'
+ }, (error, req) => {
+ // disposed
+ if (!this.request) {
+ return;
+ } // clear the loader's request reference
+
+ this.request = null;
+ if (error) {
+ this.error = {
+ status: req.status,
+ message: `HLS playlist request error at URL: ${this.src}.`,
+ responseText: req.responseText,
+ // MEDIA_ERR_NETWORK
+ code: 2,
+ metadata: {
+ errorType: videojs.Error.HlsPlaylistRequestError
+ }
+ };
+ if (this.state === 'HAVE_NOTHING') {
+ this.started = false;
+ }
+ return this.trigger('error');
+ }
+ this.src = resolveManifestRedirect(this.src, req);
+ const manifest = this.parseManifest_({
+ manifestString: req.responseText,
+ url: this.src
+ });
+ this.setupInitialPlaylist(manifest);
+ });
+ }
+ srcUri() {
+ return typeof this.src === 'string' ? this.src : this.src.uri;
+ }
+ /**
+ * Given a manifest object that's either a main or media playlist, trigger the proper
+ * events and set the state of the playlist loader.
+ *
+ * If the manifest object represents a main playlist, `loadedplaylist` will be
+ * triggered to allow listeners to select a playlist. If none is selected, the loader
+ * will default to the first one in the playlists array.
+ *
+ * If the manifest object represents a media playlist, `loadedplaylist` will be
+ * triggered followed by `loadedmetadata`, as the only available playlist is loaded.
+ *
+ * In the case of a media playlist, a main playlist object wrapper with one playlist
+ * will be created so that all logic can handle playlists in the same fashion (as an
+ * assumed manifest object schema).
+ *
+ * @param {Object} manifest
+ * The parsed manifest object
+ */
+
+ setupInitialPlaylist(manifest) {
+ this.state = 'HAVE_MAIN_MANIFEST';
+ if (manifest.playlists) {
+ this.main = manifest;
+ addPropertiesToMain(this.main, this.srcUri()); // If the initial main playlist has playlists wtih segments already resolved,
+ // then resolve URIs in advance, as they are usually done after a playlist request,
+ // which may not happen if the playlist is resolved.
+
+ manifest.playlists.forEach(playlist => {
+ playlist.segments = getAllSegments(playlist);
+ playlist.segments.forEach(segment => {
+ resolveSegmentUris(segment, playlist.resolvedUri);
+ });
+ });
+ this.trigger('loadedplaylist');
+ if (!this.request) {
+ // no media playlist was specifically selected so start
+ // from the first listed one
+ this.media(this.main.playlists[0]);
+ }
+ return;
+ } // In order to support media playlists passed in as vhs-json, the case where the uri
+ // is not provided as part of the manifest should be considered, and an appropriate
+ // default used.
+
+ const uri = this.srcUri() || window.location.href;
+ this.main = mainForMedia(manifest, uri);
+ this.haveMetadata({
+ playlistObject: manifest,
+ url: uri,
+ id: this.main.playlists[0].id
+ });
+ this.trigger('loadedmetadata');
+ }
+ /**
+ * Updates or deletes a preexisting pathway clone.
+ * Ensures that all playlists related to the old pathway clone are
+ * either updated or deleted.
+ *
+ * @param {Object} clone On update, the pathway clone object for the newly updated pathway clone.
+ * On delete, the old pathway clone object to be deleted.
+ * @param {boolean} isUpdate True if the pathway is to be updated,
+ * false if it is meant to be deleted.
+ */
+
+ updateOrDeleteClone(clone, isUpdate) {
+ const main = this.main;
+ const pathway = clone.ID;
+ let i = main.playlists.length; // Iterate backwards through the playlist so we can remove playlists if necessary.
+
+ while (i--) {
+ const p = main.playlists[i];
+ if (p.attributes['PATHWAY-ID'] === pathway) {
+ const oldPlaylistUri = p.resolvedUri;
+ const oldPlaylistId = p.id; // update the indexed playlist and add new playlists by ID and URI
+
+ if (isUpdate) {
+ const newPlaylistUri = this.createCloneURI_(p.resolvedUri, clone);
+ const newPlaylistId = createPlaylistID(pathway, newPlaylistUri);
+ const attributes = this.createCloneAttributes_(pathway, p.attributes);
+ const updatedPlaylist = this.createClonePlaylist_(p, newPlaylistId, clone, attributes);
+ main.playlists[i] = updatedPlaylist;
+ main.playlists[newPlaylistId] = updatedPlaylist;
+ main.playlists[newPlaylistUri] = updatedPlaylist;
+ } else {
+ // Remove the indexed playlist.
+ main.playlists.splice(i, 1);
+ } // Remove playlists by the old ID and URI.
+
+ delete main.playlists[oldPlaylistId];
+ delete main.playlists[oldPlaylistUri];
+ }
+ }
+ this.updateOrDeleteCloneMedia(clone, isUpdate);
+ }
+ /**
+ * Updates or deletes media data based on the pathway clone object.
+ * Due to the complexity of the media groups and playlists, in all cases
+ * we remove all of the old media groups and playlists.
+ * On updates, we then create new media groups and playlists based on the
+ * new pathway clone object.
+ *
+ * @param {Object} clone The pathway clone object for the newly updated pathway clone.
+ * @param {boolean} isUpdate True if the pathway is to be updated,
+ * false if it is meant to be deleted.
+ */
+
+ updateOrDeleteCloneMedia(clone, isUpdate) {
+ const main = this.main;
+ const id = clone.ID;
+ ['AUDIO', 'SUBTITLES', 'CLOSED-CAPTIONS'].forEach(mediaType => {
+ if (!main.mediaGroups[mediaType] || !main.mediaGroups[mediaType][id]) {
+ return;
+ }
+ for (const groupKey in main.mediaGroups[mediaType]) {
+ // Remove all media playlists for the media group for this pathway clone.
+ if (groupKey === id) {
+ for (const labelKey in main.mediaGroups[mediaType][groupKey]) {
+ const oldMedia = main.mediaGroups[mediaType][groupKey][labelKey];
+ oldMedia.playlists.forEach((p, i) => {
+ const oldMediaPlaylist = main.playlists[p.id];
+ const oldPlaylistId = oldMediaPlaylist.id;
+ const oldPlaylistUri = oldMediaPlaylist.resolvedUri;
+ delete main.playlists[oldPlaylistId];
+ delete main.playlists[oldPlaylistUri];
+ });
+ } // Delete the old media group.
+
+ delete main.mediaGroups[mediaType][groupKey];
+ }
+ }
+ }); // Create the new media groups and playlists if there is an update.
+
+ if (isUpdate) {
+ this.createClonedMediaGroups_(clone);
+ }
+ }
+ /**
+ * Given a pathway clone object, clones all necessary playlists.
+ *
+ * @param {Object} clone The pathway clone object.
+ * @param {Object} basePlaylist The original playlist to clone from.
+ */
+
+ addClonePathway(clone, basePlaylist = {}) {
+ const main = this.main;
+ const index = main.playlists.length;
+ const uri = this.createCloneURI_(basePlaylist.resolvedUri, clone);
+ const playlistId = createPlaylistID(clone.ID, uri);
+ const attributes = this.createCloneAttributes_(clone.ID, basePlaylist.attributes);
+ const playlist = this.createClonePlaylist_(basePlaylist, playlistId, clone, attributes);
+ main.playlists[index] = playlist; // add playlist by ID and URI
+
+ main.playlists[playlistId] = playlist;
+ main.playlists[uri] = playlist;
+ this.createClonedMediaGroups_(clone);
+ }
+ /**
+ * Given a pathway clone object we create clones of all media.
+ * In this function, all necessary information and updated playlists
+ * are added to the `mediaGroup` object.
+ * Playlists are also added to the `playlists` array so the media groups
+ * will be properly linked.
+ *
+ * @param {Object} clone The pathway clone object.
+ */
+
+ createClonedMediaGroups_(clone) {
+ const id = clone.ID;
+ const baseID = clone['BASE-ID'];
+ const main = this.main;
+ ['AUDIO', 'SUBTITLES', 'CLOSED-CAPTIONS'].forEach(mediaType => {
+ // If the media type doesn't exist, or there is already a clone, skip
+ // to the next media type.
+ if (!main.mediaGroups[mediaType] || main.mediaGroups[mediaType][id]) {
+ return;
+ }
+ for (const groupKey in main.mediaGroups[mediaType]) {
+ if (groupKey === baseID) {
+ // Create the group.
+ main.mediaGroups[mediaType][id] = {};
+ } else {
+ // There is no need to iterate over label keys in this case.
+ continue;
+ }
+ for (const labelKey in main.mediaGroups[mediaType][groupKey]) {
+ const oldMedia = main.mediaGroups[mediaType][groupKey][labelKey];
+ main.mediaGroups[mediaType][id][labelKey] = _extends$1({}, oldMedia);
+ const newMedia = main.mediaGroups[mediaType][id][labelKey]; // update URIs on the media
+
+ const newUri = this.createCloneURI_(oldMedia.resolvedUri, clone);
+ newMedia.resolvedUri = newUri;
+ newMedia.uri = newUri; // Reset playlists in the new media group.
+
+ newMedia.playlists = []; // Create new playlists in the newly cloned media group.
+
+ oldMedia.playlists.forEach((p, i) => {
+ const oldMediaPlaylist = main.playlists[p.id];
+ const group = groupID(mediaType, id, labelKey);
+ const newPlaylistID = createPlaylistID(id, group); // Check to see if it already exists
+
+ if (oldMediaPlaylist && !main.playlists[newPlaylistID]) {
+ const newMediaPlaylist = this.createClonePlaylist_(oldMediaPlaylist, newPlaylistID, clone);
+ const newPlaylistUri = newMediaPlaylist.resolvedUri;
+ main.playlists[newPlaylistID] = newMediaPlaylist;
+ main.playlists[newPlaylistUri] = newMediaPlaylist;
+ }
+ newMedia.playlists[i] = this.createClonePlaylist_(p, newPlaylistID, clone);
+ });
+ }
+ }
+ });
+ }
+ /**
+ * Using the original playlist to be cloned, and the pathway clone object
+ * information, we create a new playlist.
+ *
+ * @param {Object} basePlaylist The original playlist to be cloned from.
+ * @param {string} id The desired id of the newly cloned playlist.
+ * @param {Object} clone The pathway clone object.
+ * @param {Object} attributes An optional object to populate the `attributes` property in the playlist.
+ *
+ * @return {Object} The combined cloned playlist.
+ */
+
+ createClonePlaylist_(basePlaylist, id, clone, attributes) {
+ const uri = this.createCloneURI_(basePlaylist.resolvedUri, clone);
+ const newProps = {
+ resolvedUri: uri,
+ uri,
+ id
+ }; // Remove all segments from previous playlist in the clone.
+
+ if (basePlaylist.segments) {
+ newProps.segments = [];
+ }
+ if (attributes) {
+ newProps.attributes = attributes;
+ }
+ return merge(basePlaylist, newProps);
+ }
+ /**
+ * Generates an updated URI for a cloned pathway based on the original
+ * pathway's URI and the paramaters from the pathway clone object in the
+ * content steering server response.
+ *
+ * @param {string} baseUri URI to be updated in the cloned pathway.
+ * @param {Object} clone The pathway clone object.
+ *
+ * @return {string} The updated URI for the cloned pathway.
+ */
+
+ createCloneURI_(baseURI, clone) {
+ const uri = new URL(baseURI);
+ uri.hostname = clone['URI-REPLACEMENT'].HOST;
+ const params = clone['URI-REPLACEMENT'].PARAMS; // Add params to the cloned URL.
+
+ for (const key of Object.keys(params)) {
+ uri.searchParams.set(key, params[key]);
+ }
+ return uri.href;
+ }
+ /**
+ * Helper function to create the attributes needed for the new clone.
+ * This mainly adds the necessary media attributes.
+ *
+ * @param {string} id The pathway clone object ID.
+ * @param {Object} oldAttributes The old attributes to compare to.
+ * @return {Object} The new attributes to add to the playlist.
+ */
+
+ createCloneAttributes_(id, oldAttributes) {
+ const attributes = {
+ ['PATHWAY-ID']: id
+ };
+ ['AUDIO', 'SUBTITLES', 'CLOSED-CAPTIONS'].forEach(mediaType => {
+ if (oldAttributes[mediaType]) {
+ attributes[mediaType] = id;
+ }
+ });
+ return attributes;
+ }
+ /**
+ * Returns the key ID set from a playlist
+ *
+ * @param {playlist} playlist to fetch the key ID set from.
+ * @return a Set of 32 digit hex strings that represent the unique keyIds for that playlist.
+ */
+
+ getKeyIdSet(playlist) {
+ if (playlist.contentProtection) {
+ const keyIds = new Set();
+ for (const keysystem in playlist.contentProtection) {
+ const keyId = playlist.contentProtection[keysystem].attributes.keyId;
+ if (keyId) {
+ keyIds.add(keyId.toLowerCase());
+ }
+ }
+ return keyIds;
+ }
+ }
+ }
+
+ /**
+ * @file xhr.js
+ */
+
+ const callbackWrapper = function (request, error, response, callback) {
+ const reqResponse = request.responseType === 'arraybuffer' ? request.response : request.responseText;
+ if (!error && reqResponse) {
+ request.responseTime = Date.now();
+ request.roundTripTime = request.responseTime - request.requestTime;
+ request.bytesReceived = reqResponse.byteLength || reqResponse.length;
+ if (!request.bandwidth) {
+ request.bandwidth = Math.floor(request.bytesReceived / request.roundTripTime * 8 * 1000);
+ }
+ }
+ if (response.headers) {
+ request.responseHeaders = response.headers;
+ } // videojs.xhr now uses a specific code on the error
+ // object to signal that a request has timed out instead
+ // of setting a boolean on the request object
+
+ if (error && error.code === 'ETIMEDOUT') {
+ request.timedout = true;
+ } // videojs.xhr no longer considers status codes outside of 200 and 0
+ // (for file uris) to be errors, but the old XHR did, so emulate that
+ // behavior. Status 206 may be used in response to byterange requests.
+
+ if (!error && !request.aborted && response.statusCode !== 200 && response.statusCode !== 206 && response.statusCode !== 0) {
+ error = new Error('XHR Failed with a response of: ' + (request && (reqResponse || request.responseText)));
+ }
+ callback(error, request);
+ };
+ /**
+ * Iterates over the request hooks Set and calls them in order
+ *
+ * @param {Set} hooks the hook Set to iterate over
+ * @param {Object} options the request options to pass to the xhr wrapper
+ * @return the callback hook function return value, the modified or new options Object.
+ */
+
+ const callAllRequestHooks = (requestSet, options) => {
+ if (!requestSet || !requestSet.size) {
+ return;
+ }
+ let newOptions = options;
+ requestSet.forEach(requestCallback => {
+ newOptions = requestCallback(newOptions);
+ });
+ return newOptions;
+ };
+ /**
+ * Iterates over the response hooks Set and calls them in order.
+ *
+ * @param {Set} hooks the hook Set to iterate over
+ * @param {Object} request the xhr request object
+ * @param {Object} error the xhr error object
+ * @param {Object} response the xhr response object
+ */
+
+ const callAllResponseHooks = (responseSet, request, error, response) => {
+ if (!responseSet || !responseSet.size) {
+ return;
+ }
+ responseSet.forEach(responseCallback => {
+ responseCallback(request, error, response);
+ });
+ };
+ const xhrFactory = function () {
+ const xhr = function XhrFunction(options, callback) {
+ // Add a default timeout
+ options = merge({
+ timeout: 45e3
+ }, options); // Allow an optional user-specified function to modify the option
+ // object before we construct the xhr request
+ // TODO: Remove beforeRequest in the next major release.
+
+ const beforeRequest = XhrFunction.beforeRequest || videojs.Vhs.xhr.beforeRequest; // onRequest and onResponse hooks as a Set, at either the player or global level.
+ // TODO: new Set added here for beforeRequest alias. Remove this when beforeRequest is removed.
+
+ const _requestCallbackSet = XhrFunction._requestCallbackSet || videojs.Vhs.xhr._requestCallbackSet || new Set();
+ const _responseCallbackSet = XhrFunction._responseCallbackSet || videojs.Vhs.xhr._responseCallbackSet;
+ if (beforeRequest && typeof beforeRequest === 'function') {
+ videojs.log.warn('beforeRequest is deprecated, use onRequest instead.');
+ _requestCallbackSet.add(beforeRequest);
+ } // Use the standard videojs.xhr() method unless `videojs.Vhs.xhr` has been overriden
+ // TODO: switch back to videojs.Vhs.xhr.name === 'XhrFunction' when we drop IE11
+
+ const xhrMethod = videojs.Vhs.xhr.original === true ? videojs.xhr : videojs.Vhs.xhr; // call all registered onRequest hooks, assign new options.
+
+ const beforeRequestOptions = callAllRequestHooks(_requestCallbackSet, options); // Remove the beforeRequest function from the hooks set so stale beforeRequest functions are not called.
+
+ _requestCallbackSet.delete(beforeRequest); // xhrMethod will call XMLHttpRequest.open and XMLHttpRequest.send
+
+ const request = xhrMethod(beforeRequestOptions || options, function (error, response) {
+ // call all registered onResponse hooks
+ callAllResponseHooks(_responseCallbackSet, request, error, response);
+ return callbackWrapper(request, error, response, callback);
+ });
+ const originalAbort = request.abort;
+ request.abort = function () {
+ request.aborted = true;
+ return originalAbort.apply(request, arguments);
+ };
+ request.uri = options.uri;
+ request.requestTime = Date.now();
+ return request;
+ };
+ xhr.original = true;
+ return xhr;
+ };
+ /**
+ * Turns segment byterange into a string suitable for use in
+ * HTTP Range requests
+ *
+ * @param {Object} byterange - an object with two values defining the start and end
+ * of a byte-range
+ */
+
+ const byterangeStr = function (byterange) {
+ // `byterangeEnd` is one less than `offset + length` because the HTTP range
+ // header uses inclusive ranges
+ let byterangeEnd;
+ const byterangeStart = byterange.offset;
+ if (typeof byterange.offset === 'bigint' || typeof byterange.length === 'bigint') {
+ byterangeEnd = window.BigInt(byterange.offset) + window.BigInt(byterange.length) - window.BigInt(1);
+ } else {
+ byterangeEnd = byterange.offset + byterange.length - 1;
+ }
+ return 'bytes=' + byterangeStart + '-' + byterangeEnd;
+ };
+ /**
+ * Defines headers for use in the xhr request for a particular segment.
+ *
+ * @param {Object} segment - a simplified copy of the segmentInfo object
+ * from SegmentLoader
+ */
+
+ const segmentXhrHeaders = function (segment) {
+ const headers = {};
+ if (segment.byterange) {
+ headers.Range = byterangeStr(segment.byterange);
+ }
+ return headers;
+ };
+
+ /**
+ * @file bin-utils.js
+ */
+
+ /**
+ * convert a TimeRange to text
+ *
+ * @param {TimeRange} range the timerange to use for conversion
+ * @param {number} i the iterator on the range to convert
+ * @return {string} the range in string format
+ */
+
+ const textRange = function (range, i) {
+ return range.start(i) + '-' + range.end(i);
+ };
+ /**
+ * format a number as hex string
+ *
+ * @param {number} e The number
+ * @param {number} i the iterator
+ * @return {string} the hex formatted number as a string
+ */
+
+ const formatHexString = function (e, i) {
+ const value = e.toString(16);
+ return '00'.substring(0, 2 - value.length) + value + (i % 2 ? ' ' : '');
+ };
+ const formatAsciiString = function (e) {
+ if (e >= 0x20 && e < 0x7e) {
+ return String.fromCharCode(e);
+ }
+ return '.';
+ };
+ /**
+ * Creates an object for sending to a web worker modifying properties that are TypedArrays
+ * into a new object with seperated properties for the buffer, byteOffset, and byteLength.
+ *
+ * @param {Object} message
+ * Object of properties and values to send to the web worker
+ * @return {Object}
+ * Modified message with TypedArray values expanded
+ * @function createTransferableMessage
+ */
+
+ const createTransferableMessage = function (message) {
+ const transferable = {};
+ Object.keys(message).forEach(key => {
+ const value = message[key];
+ if (isArrayBufferView(value)) {
+ transferable[key] = {
+ bytes: value.buffer,
+ byteOffset: value.byteOffset,
+ byteLength: value.byteLength
+ };
+ } else {
+ transferable[key] = value;
+ }
+ });
+ return transferable;
+ };
+ /**
+ * Returns a unique string identifier for a media initialization
+ * segment.
+ *
+ * @param {Object} initSegment
+ * the init segment object.
+ *
+ * @return {string} the generated init segment id
+ */
+
+ const initSegmentId = function (initSegment) {
+ const byterange = initSegment.byterange || {
+ length: Infinity,
+ offset: 0
+ };
+ return [byterange.length, byterange.offset, initSegment.resolvedUri].join(',');
+ };
+ /**
+ * Returns a unique string identifier for a media segment key.
+ *
+ * @param {Object} key the encryption key
+ * @return {string} the unique id for the media segment key.
+ */
+
+ const segmentKeyId = function (key) {
+ return key.resolvedUri;
+ };
+ /**
+ * utils to help dump binary data to the console
+ *
+ * @param {Array|TypedArray} data
+ * data to dump to a string
+ *
+ * @return {string} the data as a hex string.
+ */
+
+ const hexDump = data => {
+ const bytes = Array.prototype.slice.call(data);
+ const step = 16;
+ let result = '';
+ let hex;
+ let ascii;
+ for (let j = 0; j < bytes.length / step; j++) {
+ hex = bytes.slice(j * step, j * step + step).map(formatHexString).join('');
+ ascii = bytes.slice(j * step, j * step + step).map(formatAsciiString).join('');
+ result += hex + ' ' + ascii + '\n';
+ }
+ return result;
+ };
+ const tagDump = ({
+ bytes
+ }) => hexDump(bytes);
+ const textRanges = ranges => {
+ let result = '';
+ let i;
+ for (i = 0; i < ranges.length; i++) {
+ result += textRange(ranges, i) + ' ';
+ }
+ return result;
+ };
+ var utils = /*#__PURE__*/Object.freeze({
+ __proto__: null,
+ createTransferableMessage: createTransferableMessage,
+ initSegmentId: initSegmentId,
+ segmentKeyId: segmentKeyId,
+ hexDump: hexDump,
+ tagDump: tagDump,
+ textRanges: textRanges
+ });
+
+ // TODO handle fmp4 case where the timing info is accurate and doesn't involve transmux
+ // 25% was arbitrarily chosen, and may need to be refined over time.
+
+ const SEGMENT_END_FUDGE_PERCENT = 0.25;
+ /**
+ * Converts a player time (any time that can be gotten/set from player.currentTime(),
+ * e.g., any time within player.seekable().start(0) to player.seekable().end(0)) to a
+ * program time (any time referencing the real world (e.g., EXT-X-PROGRAM-DATE-TIME)).
+ *
+ * The containing segment is required as the EXT-X-PROGRAM-DATE-TIME serves as an "anchor
+ * point" (a point where we have a mapping from program time to player time, with player
+ * time being the post transmux start of the segment).
+ *
+ * For more details, see [this doc](../../docs/program-time-from-player-time.md).
+ *
+ * @param {number} playerTime the player time
+ * @param {Object} segment the segment which contains the player time
+ * @return {Date} program time
+ */
+
+ const playerTimeToProgramTime = (playerTime, segment) => {
+ if (!segment.dateTimeObject) {
+ // Can't convert without an "anchor point" for the program time (i.e., a time that can
+ // be used to map the start of a segment with a real world time).
+ return null;
+ }
+ const transmuxerPrependedSeconds = segment.videoTimingInfo.transmuxerPrependedSeconds;
+ const transmuxedStart = segment.videoTimingInfo.transmuxedPresentationStart; // get the start of the content from before old content is prepended
+
+ const startOfSegment = transmuxedStart + transmuxerPrependedSeconds;
+ const offsetFromSegmentStart = playerTime - startOfSegment;
+ return new Date(segment.dateTimeObject.getTime() + offsetFromSegmentStart * 1000);
+ };
+ const originalSegmentVideoDuration = videoTimingInfo => {
+ return videoTimingInfo.transmuxedPresentationEnd - videoTimingInfo.transmuxedPresentationStart - videoTimingInfo.transmuxerPrependedSeconds;
+ };
+ /**
+ * Finds a segment that contains the time requested given as an ISO-8601 string. The
+ * returned segment might be an estimate or an accurate match.
+ *
+ * @param {string} programTime The ISO-8601 programTime to find a match for
+ * @param {Object} playlist A playlist object to search within
+ */
+
+ const findSegmentForProgramTime = (programTime, playlist) => {
+ // Assumptions:
+ // - verifyProgramDateTimeTags has already been run
+ // - live streams have been started
+ let dateTimeObject;
+ try {
+ dateTimeObject = new Date(programTime);
+ } catch (e) {
+ return null;
+ }
+ if (!playlist || !playlist.segments || playlist.segments.length === 0) {
+ return null;
+ }
+ let segment = playlist.segments[0];
+ if (dateTimeObject < new Date(segment.dateTimeObject)) {
+ // Requested time is before stream start.
+ return null;
+ }
+ for (let i = 0; i < playlist.segments.length - 1; i++) {
+ segment = playlist.segments[i];
+ const nextSegmentStart = new Date(playlist.segments[i + 1].dateTimeObject);
+ if (dateTimeObject < nextSegmentStart) {
+ break;
+ }
+ }
+ const lastSegment = playlist.segments[playlist.segments.length - 1];
+ const lastSegmentStart = lastSegment.dateTimeObject;
+ const lastSegmentDuration = lastSegment.videoTimingInfo ? originalSegmentVideoDuration(lastSegment.videoTimingInfo) : lastSegment.duration + lastSegment.duration * SEGMENT_END_FUDGE_PERCENT;
+ const lastSegmentEnd = new Date(lastSegmentStart.getTime() + lastSegmentDuration * 1000);
+ if (dateTimeObject > lastSegmentEnd) {
+ // Beyond the end of the stream, or our best guess of the end of the stream.
+ return null;
+ }
+ if (dateTimeObject > new Date(lastSegmentStart)) {
+ segment = lastSegment;
+ }
+ return {
+ segment,
+ estimatedStart: segment.videoTimingInfo ? segment.videoTimingInfo.transmuxedPresentationStart : Playlist.duration(playlist, playlist.mediaSequence + playlist.segments.indexOf(segment)),
+ // Although, given that all segments have accurate date time objects, the segment
+ // selected should be accurate, unless the video has been transmuxed at some point
+ // (determined by the presence of the videoTimingInfo object), the segment's "player
+ // time" (the start time in the player) can't be considered accurate.
+ type: segment.videoTimingInfo ? 'accurate' : 'estimate'
+ };
+ };
+ /**
+ * Finds a segment that contains the given player time(in seconds).
+ *
+ * @param {number} time The player time to find a match for
+ * @param {Object} playlist A playlist object to search within
+ */
+
+ const findSegmentForPlayerTime = (time, playlist) => {
+ // Assumptions:
+ // - there will always be a segment.duration
+ // - we can start from zero
+ // - segments are in time order
+ if (!playlist || !playlist.segments || playlist.segments.length === 0) {
+ return null;
+ }
+ let segmentEnd = 0;
+ let segment;
+ for (let i = 0; i < playlist.segments.length; i++) {
+ segment = playlist.segments[i]; // videoTimingInfo is set after the segment is downloaded and transmuxed, and
+ // should contain the most accurate values we have for the segment's player times.
+ //
+ // Use the accurate transmuxedPresentationEnd value if it is available, otherwise fall
+ // back to an estimate based on the manifest derived (inaccurate) segment.duration, to
+ // calculate an end value.
+
+ segmentEnd = segment.videoTimingInfo ? segment.videoTimingInfo.transmuxedPresentationEnd : segmentEnd + segment.duration;
+ if (time <= segmentEnd) {
+ break;
+ }
+ }
+ const lastSegment = playlist.segments[playlist.segments.length - 1];
+ if (lastSegment.videoTimingInfo && lastSegment.videoTimingInfo.transmuxedPresentationEnd < time) {
+ // The time requested is beyond the stream end.
+ return null;
+ }
+ if (time > segmentEnd) {
+ // The time is within or beyond the last segment.
+ //
+ // Check to see if the time is beyond a reasonable guess of the end of the stream.
+ if (time > segmentEnd + lastSegment.duration * SEGMENT_END_FUDGE_PERCENT) {
+ // Technically, because the duration value is only an estimate, the time may still
+ // exist in the last segment, however, there isn't enough information to make even
+ // a reasonable estimate.
+ return null;
+ }
+ segment = lastSegment;
+ }
+ return {
+ segment,
+ estimatedStart: segment.videoTimingInfo ? segment.videoTimingInfo.transmuxedPresentationStart : segmentEnd - segment.duration,
+ // Because videoTimingInfo is only set after transmux, it is the only way to get
+ // accurate timing values.
+ type: segment.videoTimingInfo ? 'accurate' : 'estimate'
+ };
+ };
+ /**
+ * Gives the offset of the comparisonTimestamp from the programTime timestamp in seconds.
+ * If the offset returned is positive, the programTime occurs after the
+ * comparisonTimestamp.
+ * If the offset is negative, the programTime occurs before the comparisonTimestamp.
+ *
+ * @param {string} comparisonTimeStamp An ISO-8601 timestamp to compare against
+ * @param {string} programTime The programTime as an ISO-8601 string
+ * @return {number} offset
+ */
+
+ const getOffsetFromTimestamp = (comparisonTimeStamp, programTime) => {
+ let segmentDateTime;
+ let programDateTime;
+ try {
+ segmentDateTime = new Date(comparisonTimeStamp);
+ programDateTime = new Date(programTime);
+ } catch (e) {// TODO handle error
+ }
+ const segmentTimeEpoch = segmentDateTime.getTime();
+ const programTimeEpoch = programDateTime.getTime();
+ return (programTimeEpoch - segmentTimeEpoch) / 1000;
+ };
+ /**
+ * Checks that all segments in this playlist have programDateTime tags.
+ *
+ * @param {Object} playlist A playlist object
+ */
+
+ const verifyProgramDateTimeTags = playlist => {
+ if (!playlist.segments || playlist.segments.length === 0) {
+ return false;
+ }
+ for (let i = 0; i < playlist.segments.length; i++) {
+ const segment = playlist.segments[i];
+ if (!segment.dateTimeObject) {
+ return false;
+ }
+ }
+ return true;
+ };
+ /**
+ * Returns the programTime of the media given a playlist and a playerTime.
+ * The playlist must have programDateTime tags for a programDateTime tag to be returned.
+ * If the segments containing the time requested have not been buffered yet, an estimate
+ * may be returned to the callback.
+ *
+ * @param {Object} args
+ * @param {Object} args.playlist A playlist object to search within
+ * @param {number} time A playerTime in seconds
+ * @param {Function} callback(err, programTime)
+ * @return {string} err.message A detailed error message
+ * @return {Object} programTime
+ * @return {number} programTime.mediaSeconds The streamTime in seconds
+ * @return {string} programTime.programDateTime The programTime as an ISO-8601 String
+ */
+
+ const getProgramTime = ({
+ playlist,
+ time = undefined,
+ callback
+ }) => {
+ if (!callback) {
+ throw new Error('getProgramTime: callback must be provided');
+ }
+ if (!playlist || time === undefined) {
+ return callback({
+ message: 'getProgramTime: playlist and time must be provided'
+ });
+ }
+ const matchedSegment = findSegmentForPlayerTime(time, playlist);
+ if (!matchedSegment) {
+ return callback({
+ message: 'valid programTime was not found'
+ });
+ }
+ if (matchedSegment.type === 'estimate') {
+ return callback({
+ message: 'Accurate programTime could not be determined.' + ' Please seek to e.seekTime and try again',
+ seekTime: matchedSegment.estimatedStart
+ });
+ }
+ const programTimeObject = {
+ mediaSeconds: time
+ };
+ const programTime = playerTimeToProgramTime(time, matchedSegment.segment);
+ if (programTime) {
+ programTimeObject.programDateTime = programTime.toISOString();
+ }
+ return callback(null, programTimeObject);
+ };
+ /**
+ * Seeks in the player to a time that matches the given programTime ISO-8601 string.
+ *
+ * @param {Object} args
+ * @param {string} args.programTime A programTime to seek to as an ISO-8601 String
+ * @param {Object} args.playlist A playlist to look within
+ * @param {number} args.retryCount The number of times to try for an accurate seek. Default is 2.
+ * @param {Function} args.seekTo A method to perform a seek
+ * @param {boolean} args.pauseAfterSeek Whether to end in a paused state after seeking. Default is true.
+ * @param {Object} args.tech The tech to seek on
+ * @param {Function} args.callback(err, newTime) A callback to return the new time to
+ * @return {string} err.message A detailed error message
+ * @return {number} newTime The exact time that was seeked to in seconds
+ */
+
+ const seekToProgramTime = ({
+ programTime,
+ playlist,
+ retryCount = 2,
+ seekTo,
+ pauseAfterSeek = true,
+ tech,
+ callback
+ }) => {
+ if (!callback) {
+ throw new Error('seekToProgramTime: callback must be provided');
+ }
+ if (typeof programTime === 'undefined' || !playlist || !seekTo) {
+ return callback({
+ message: 'seekToProgramTime: programTime, seekTo and playlist must be provided'
+ });
+ }
+ if (!playlist.endList && !tech.hasStarted_) {
+ return callback({
+ message: 'player must be playing a live stream to start buffering'
+ });
+ }
+ if (!verifyProgramDateTimeTags(playlist)) {
+ return callback({
+ message: 'programDateTime tags must be provided in the manifest ' + playlist.resolvedUri
+ });
+ }
+ const matchedSegment = findSegmentForProgramTime(programTime, playlist); // no match
+
+ if (!matchedSegment) {
+ return callback({
+ message: `${programTime} was not found in the stream`
+ });
+ }
+ const segment = matchedSegment.segment;
+ const mediaOffset = getOffsetFromTimestamp(segment.dateTimeObject, programTime);
+ if (matchedSegment.type === 'estimate') {
+ // we've run out of retries
+ if (retryCount === 0) {
+ return callback({
+ message: `${programTime} is not buffered yet. Try again`
+ });
+ }
+ seekTo(matchedSegment.estimatedStart + mediaOffset);
+ tech.one('seeked', () => {
+ seekToProgramTime({
+ programTime,
+ playlist,
+ retryCount: retryCount - 1,
+ seekTo,
+ pauseAfterSeek,
+ tech,
+ callback
+ });
+ });
+ return;
+ } // Since the segment.start value is determined from the buffered end or ending time
+ // of the prior segment, the seekToTime doesn't need to account for any transmuxer
+ // modifications.
+
+ const seekToTime = segment.start + mediaOffset;
+ const seekedCallback = () => {
+ return callback(null, tech.currentTime());
+ }; // listen for seeked event
+
+ tech.one('seeked', seekedCallback); // pause before seeking as video.js will restore this state
+
+ if (pauseAfterSeek) {
+ tech.pause();
+ }
+ seekTo(seekToTime);
+ };
+
+ // which will only happen if the request is complete.
+
+ const callbackOnCompleted = (request, cb) => {
+ if (request.readyState === 4) {
+ return cb();
+ }
+ return;
+ };
+ const containerRequest = (uri, xhr, cb) => {
+ let bytes = [];
+ let id3Offset;
+ let finished = false;
+ const endRequestAndCallback = function (err, req, type, _bytes) {
+ req.abort();
+ finished = true;
+ return cb(err, req, type, _bytes);
+ };
+ const progressListener = function (error, request) {
+ if (finished) {
+ return;
+ }
+ if (error) {
+ return endRequestAndCallback(error, request, '', bytes);
+ } // grap the new part of content that was just downloaded
+
+ const newPart = request.responseText.substring(bytes && bytes.byteLength || 0, request.responseText.length); // add that onto bytes
+
+ bytes = concatTypedArrays(bytes, stringToBytes(newPart, true));
+ id3Offset = id3Offset || getId3Offset(bytes); // we need at least 10 bytes to determine a type
+ // or we need at least two bytes after an id3Offset
+
+ if (bytes.length < 10 || id3Offset && bytes.length < id3Offset + 2) {
+ return callbackOnCompleted(request, () => endRequestAndCallback(error, request, '', bytes));
+ }
+ const type = detectContainerForBytes(bytes); // if this looks like a ts segment but we don't have enough data
+ // to see the second sync byte, wait until we have enough data
+ // before declaring it ts
+
+ if (type === 'ts' && bytes.length < 188) {
+ return callbackOnCompleted(request, () => endRequestAndCallback(error, request, '', bytes));
+ } // this may be an unsynced ts segment
+ // wait for 376 bytes before detecting no container
+
+ if (!type && bytes.length < 376) {
+ return callbackOnCompleted(request, () => endRequestAndCallback(error, request, '', bytes));
+ }
+ return endRequestAndCallback(null, request, type, bytes);
+ };
+ const options = {
+ uri,
+ beforeSend(request) {
+ // this forces the browser to pass the bytes to us unprocessed
+ request.overrideMimeType('text/plain; charset=x-user-defined');
+ request.addEventListener('progress', function ({
+ total,
+ loaded
+ }) {
+ return callbackWrapper(request, null, {
+ statusCode: request.status
+ }, progressListener);
+ });
+ }
+ };
+ const request = xhr(options, function (error, response) {
+ return callbackWrapper(request, error, response, progressListener);
+ });
+ return request;
+ };
+ const {
+ EventTarget
+ } = videojs;
+ const dashPlaylistUnchanged = function (a, b) {
+ if (!isPlaylistUnchanged(a, b)) {
+ return false;
+ } // for dash the above check will often return true in scenarios where
+ // the playlist actually has changed because mediaSequence isn't a
+ // dash thing, and we often set it to 1. So if the playlists have the same amount
+ // of segments we return true.
+ // So for dash we need to make sure that the underlying segments are different.
+ // if sidx changed then the playlists are different.
+
+ if (a.sidx && b.sidx && (a.sidx.offset !== b.sidx.offset || a.sidx.length !== b.sidx.length)) {
+ return false;
+ } else if (!a.sidx && b.sidx || a.sidx && !b.sidx) {
+ return false;
+ } // one or the other does not have segments
+ // there was a change.
+
+ if (a.segments && !b.segments || !a.segments && b.segments) {
+ return false;
+ } // neither has segments nothing changed
+
+ if (!a.segments && !b.segments) {
+ return true;
+ } // check segments themselves
+
+ for (let i = 0; i < a.segments.length; i++) {
+ const aSegment = a.segments[i];
+ const bSegment = b.segments[i]; // if uris are different between segments there was a change
+
+ if (aSegment.uri !== bSegment.uri) {
+ return false;
+ } // neither segment has a byterange, there will be no byterange change.
+
+ if (!aSegment.byterange && !bSegment.byterange) {
+ continue;
+ }
+ const aByterange = aSegment.byterange;
+ const bByterange = bSegment.byterange; // if byterange only exists on one of the segments, there was a change.
+
+ if (aByterange && !bByterange || !aByterange && bByterange) {
+ return false;
+ } // if both segments have byterange with different offsets, there was a change.
+
+ if (aByterange.offset !== bByterange.offset || aByterange.length !== bByterange.length) {
+ return false;
+ }
+ } // if everything was the same with segments, this is the same playlist.
+
+ return true;
+ };
+ /**
+ * Use the representation IDs from the mpd object to create groupIDs, the NAME is set to mandatory representation
+ * ID in the parser. This allows for continuous playout across periods with the same representation IDs
+ * (continuous periods as defined in DASH-IF 3.2.12). This is assumed in the mpd-parser as well. If we want to support
+ * periods without continuous playback this function may need modification as well as the parser.
+ */
+
+ const dashGroupId = (type, group, label, playlist) => {
+ // If the manifest somehow does not have an ID (non-dash compliant), use the label.
+ const playlistId = playlist.attributes.NAME || label;
+ return `placeholder-uri-${type}-${group}-${playlistId}`;
+ };
+ /**
+ * Parses the main XML string and updates playlist URI references.
+ *
+ * @param {Object} config
+ * Object of arguments
+ * @param {string} config.mainXml
+ * The mpd XML
+ * @param {string} config.srcUrl
+ * The mpd URL
+ * @param {Date} config.clientOffset
+ * A time difference between server and client
+ * @param {Object} config.sidxMapping
+ * SIDX mappings for moof/mdat URIs and byte ranges
+ * @return {Object}
+ * The parsed mpd manifest object
+ */
+
+ const parseMainXml = ({
+ mainXml,
+ srcUrl,
+ clientOffset,
+ sidxMapping,
+ previousManifest
+ }) => {
+ const manifest = parse(mainXml, {
+ manifestUri: srcUrl,
+ clientOffset,
+ sidxMapping,
+ previousManifest
+ });
+ addPropertiesToMain(manifest, srcUrl, dashGroupId);
+ return manifest;
+ };
+ /**
+ * Removes any mediaGroup labels that no longer exist in the newMain
+ *
+ * @param {Object} update
+ * The previous mpd object being updated
+ * @param {Object} newMain
+ * The new mpd object
+ */
+
+ const removeOldMediaGroupLabels = (update, newMain) => {
+ forEachMediaGroup(update, (properties, type, group, label) => {
+ if (!(label in newMain.mediaGroups[type][group])) {
+ delete update.mediaGroups[type][group][label];
+ }
+ });
+ };
+ /**
+ * Returns a new main manifest that is the result of merging an updated main manifest
+ * into the original version.
+ *
+ * @param {Object} oldMain
+ * The old parsed mpd object
+ * @param {Object} newMain
+ * The updated parsed mpd object
+ * @return {Object}
+ * A new object representing the original main manifest with the updated media
+ * playlists merged in
+ */
+
+ const updateMain = (oldMain, newMain, sidxMapping) => {
+ let noChanges = true;
+ let update = merge(oldMain, {
+ // These are top level properties that can be updated
+ duration: newMain.duration,
+ minimumUpdatePeriod: newMain.minimumUpdatePeriod,
+ timelineStarts: newMain.timelineStarts
+ }); // First update the playlists in playlist list
+
+ for (let i = 0; i < newMain.playlists.length; i++) {
+ const playlist = newMain.playlists[i];
+ if (playlist.sidx) {
+ const sidxKey = generateSidxKey(playlist.sidx); // add sidx segments to the playlist if we have all the sidx info already
+
+ if (sidxMapping && sidxMapping[sidxKey] && sidxMapping[sidxKey].sidx) {
+ addSidxSegmentsToPlaylist$1(playlist, sidxMapping[sidxKey].sidx, playlist.sidx.resolvedUri);
+ }
+ }
+ const playlistUpdate = updateMain$1(update, playlist, dashPlaylistUnchanged);
+ if (playlistUpdate) {
+ update = playlistUpdate;
+ noChanges = false;
+ }
+ } // Then update media group playlists
+
+ forEachMediaGroup(newMain, (properties, type, group, label) => {
+ if (properties.playlists && properties.playlists.length) {
+ const id = properties.playlists[0].id;
+ const playlistUpdate = updateMain$1(update, properties.playlists[0], dashPlaylistUnchanged);
+ if (playlistUpdate) {
+ update = playlistUpdate; // add new mediaGroup label if it doesn't exist and assign the new mediaGroup.
+
+ if (!(label in update.mediaGroups[type][group])) {
+ update.mediaGroups[type][group][label] = properties;
+ } // update the playlist reference within media groups
+
+ update.mediaGroups[type][group][label].playlists[0] = update.playlists[id];
+ noChanges = false;
+ }
+ }
+ }); // remove mediaGroup labels and references that no longer exist in the newMain
+
+ removeOldMediaGroupLabels(update, newMain);
+ if (newMain.minimumUpdatePeriod !== oldMain.minimumUpdatePeriod) {
+ noChanges = false;
+ }
+ if (noChanges) {
+ return null;
+ }
+ return update;
+ }; // SIDX should be equivalent if the URI and byteranges of the SIDX match.
+ // If the SIDXs have maps, the two maps should match,
+ // both `a` and `b` missing SIDXs is considered matching.
+ // If `a` or `b` but not both have a map, they aren't matching.
+
+ const equivalentSidx = (a, b) => {
+ const neitherMap = Boolean(!a.map && !b.map);
+ const equivalentMap = neitherMap || Boolean(a.map && b.map && a.map.byterange.offset === b.map.byterange.offset && a.map.byterange.length === b.map.byterange.length);
+ return equivalentMap && a.uri === b.uri && a.byterange.offset === b.byterange.offset && a.byterange.length === b.byterange.length;
+ }; // exported for testing
+
+ const compareSidxEntry = (playlists, oldSidxMapping) => {
+ const newSidxMapping = {};
+ for (const id in playlists) {
+ const playlist = playlists[id];
+ const currentSidxInfo = playlist.sidx;
+ if (currentSidxInfo) {
+ const key = generateSidxKey(currentSidxInfo);
+ if (!oldSidxMapping[key]) {
+ break;
+ }
+ const savedSidxInfo = oldSidxMapping[key].sidxInfo;
+ if (equivalentSidx(savedSidxInfo, currentSidxInfo)) {
+ newSidxMapping[key] = oldSidxMapping[key];
+ }
+ }
+ }
+ return newSidxMapping;
+ };
+ /**
+ * A function that filters out changed items as they need to be requested separately.
+ *
+ * The method is exported for testing
+ *
+ * @param {Object} main the parsed mpd XML returned via mpd-parser
+ * @param {Object} oldSidxMapping the SIDX to compare against
+ */
+
+ const filterChangedSidxMappings = (main, oldSidxMapping) => {
+ const videoSidx = compareSidxEntry(main.playlists, oldSidxMapping);
+ let mediaGroupSidx = videoSidx;
+ forEachMediaGroup(main, (properties, mediaType, groupKey, labelKey) => {
+ if (properties.playlists && properties.playlists.length) {
+ const playlists = properties.playlists;
+ mediaGroupSidx = merge(mediaGroupSidx, compareSidxEntry(playlists, oldSidxMapping));
+ }
+ });
+ return mediaGroupSidx;
+ };
+ class DashPlaylistLoader extends EventTarget {
+ // DashPlaylistLoader must accept either a src url or a playlist because subsequent
+ // playlist loader setups from media groups will expect to be able to pass a playlist
+ // (since there aren't external URLs to media playlists with DASH)
+ constructor(srcUrlOrPlaylist, vhs, options = {}, mainPlaylistLoader) {
+ super();
+ this.mainPlaylistLoader_ = mainPlaylistLoader || this;
+ if (!mainPlaylistLoader) {
+ this.isMain_ = true;
+ }
+ const {
+ withCredentials = false
+ } = options;
+ this.vhs_ = vhs;
+ this.withCredentials = withCredentials;
+ this.addMetadataToTextTrack = options.addMetadataToTextTrack;
+ if (!srcUrlOrPlaylist) {
+ throw new Error('A non-empty playlist URL or object is required');
+ } // event naming?
+
+ this.on('minimumUpdatePeriod', () => {
+ this.refreshXml_();
+ }); // live playlist staleness timeout
+
+ this.on('mediaupdatetimeout', () => {
+ this.refreshMedia_(this.media().id);
+ });
+ this.state = 'HAVE_NOTHING';
+ this.loadedPlaylists_ = {};
+ this.logger_ = logger('DashPlaylistLoader'); // initialize the loader state
+ // The mainPlaylistLoader will be created with a string
+
+ if (this.isMain_) {
+ this.mainPlaylistLoader_.srcUrl = srcUrlOrPlaylist; // TODO: reset sidxMapping between period changes
+ // once multi-period is refactored
+
+ this.mainPlaylistLoader_.sidxMapping_ = {};
+ } else {
+ this.childPlaylist_ = srcUrlOrPlaylist;
+ }
+ }
+ requestErrored_(err, request, startingState) {
+ // disposed
+ if (!this.request) {
+ return true;
+ } // pending request is cleared
+
+ this.request = null;
+ if (err) {
+ // use the provided error object or create one
+ // based on the request/response
+ this.error = typeof err === 'object' && !(err instanceof Error) ? err : {
+ status: request.status,
+ message: 'DASH request error at URL: ' + request.uri,
+ response: request.response,
+ // MEDIA_ERR_NETWORK
+ code: 2,
+ metadata: err.metadata
+ };
+ if (startingState) {
+ this.state = startingState;
+ }
+ this.trigger('error');
+ return true;
+ }
+ }
+ /**
+ * Verify that the container of the sidx segment can be parsed
+ * and if it can, get and parse that segment.
+ */
+
+ addSidxSegments_(playlist, startingState, cb) {
+ const sidxKey = playlist.sidx && generateSidxKey(playlist.sidx); // playlist lacks sidx or sidx segments were added to this playlist already.
+
+ if (!playlist.sidx || !sidxKey || this.mainPlaylistLoader_.sidxMapping_[sidxKey]) {
+ // keep this function async
+ this.mediaRequest_ = window.setTimeout(() => cb(false), 0);
+ return;
+ } // resolve the segment URL relative to the playlist
+
+ const uri = resolveManifestRedirect(playlist.sidx.resolvedUri);
+ const fin = (err, request) => {
+ // TODO: add error metdata here once we create an error type in video.js
+ if (this.requestErrored_(err, request, startingState)) {
+ return;
+ }
+ const sidxMapping = this.mainPlaylistLoader_.sidxMapping_;
+ let sidx;
+ try {
+ sidx = parseSidx_1(toUint8(request.response).subarray(8));
+ } catch (e) {
+ e.metadata = {
+ errorType: videojs.Error.DashManifestSidxParsingError
+ }; // sidx parsing failed.
+
+ this.requestErrored_(e, request, startingState);
+ return;
+ }
+ sidxMapping[sidxKey] = {
+ sidxInfo: playlist.sidx,
+ sidx
+ };
+ addSidxSegmentsToPlaylist$1(playlist, sidx, playlist.sidx.resolvedUri);
+ return cb(true);
+ };
+ this.request = containerRequest(uri, this.vhs_.xhr, (err, request, container, bytes) => {
+ if (err) {
+ return fin(err, request);
+ }
+ if (!container || container !== 'mp4') {
+ const sidxContainer = container || 'unknown';
+ return fin({
+ status: request.status,
+ message: `Unsupported ${sidxContainer} container type for sidx segment at URL: ${uri}`,
+ // response is just bytes in this case
+ // but we really don't want to return that.
+ response: '',
+ playlist,
+ internal: true,
+ playlistExclusionDuration: Infinity,
+ // MEDIA_ERR_NETWORK
+ code: 2,
+ metadata: {
+ errorType: videojs.Error.UnsupportedSidxContainer,
+ sidxContainer
+ }
+ }, request);
+ } // if we already downloaded the sidx bytes in the container request, use them
+
+ const {
+ offset,
+ length
+ } = playlist.sidx.byterange;
+ if (bytes.length >= length + offset) {
+ return fin(err, {
+ response: bytes.subarray(offset, offset + length),
+ status: request.status,
+ uri: request.uri
+ });
+ } // otherwise request sidx bytes
+
+ this.request = this.vhs_.xhr({
+ uri,
+ responseType: 'arraybuffer',
+ headers: segmentXhrHeaders({
+ byterange: playlist.sidx.byterange
+ })
+ }, fin);
+ });
+ }
+ dispose() {
+ this.trigger('dispose');
+ this.stopRequest();
+ this.loadedPlaylists_ = {};
+ window.clearTimeout(this.minimumUpdatePeriodTimeout_);
+ window.clearTimeout(this.mediaRequest_);
+ window.clearTimeout(this.mediaUpdateTimeout);
+ this.mediaUpdateTimeout = null;
+ this.mediaRequest_ = null;
+ this.minimumUpdatePeriodTimeout_ = null;
+ if (this.mainPlaylistLoader_.createMupOnMedia_) {
+ this.off('loadedmetadata', this.mainPlaylistLoader_.createMupOnMedia_);
+ this.mainPlaylistLoader_.createMupOnMedia_ = null;
+ }
+ this.off();
+ }
+ hasPendingRequest() {
+ return this.request || this.mediaRequest_;
+ }
+ stopRequest() {
+ if (this.request) {
+ const oldRequest = this.request;
+ this.request = null;
+ oldRequest.onreadystatechange = null;
+ oldRequest.abort();
+ }
+ }
+ media(playlist) {
+ // getter
+ if (!playlist) {
+ return this.media_;
+ } // setter
+
+ if (this.state === 'HAVE_NOTHING') {
+ throw new Error('Cannot switch media playlist from ' + this.state);
+ }
+ const startingState = this.state; // find the playlist object if the target playlist has been specified by URI
+
+ if (typeof playlist === 'string') {
+ if (!this.mainPlaylistLoader_.main.playlists[playlist]) {
+ throw new Error('Unknown playlist URI: ' + playlist);
+ }
+ playlist = this.mainPlaylistLoader_.main.playlists[playlist];
+ }
+ const mediaChange = !this.media_ || playlist.id !== this.media_.id; // switch to previously loaded playlists immediately
+
+ if (mediaChange && this.loadedPlaylists_[playlist.id] && this.loadedPlaylists_[playlist.id].endList) {
+ this.state = 'HAVE_METADATA';
+ this.media_ = playlist; // trigger media change if the active media has been updated
+
+ if (mediaChange) {
+ this.trigger('mediachanging');
+ this.trigger('mediachange');
+ }
+ return;
+ } // switching to the active playlist is a no-op
+
+ if (!mediaChange) {
+ return;
+ } // switching from an already loaded playlist
+
+ if (this.media_) {
+ this.trigger('mediachanging');
+ }
+ this.addSidxSegments_(playlist, startingState, sidxChanged => {
+ // everything is ready just continue to haveMetadata
+ this.haveMetadata({
+ startingState,
+ playlist
+ });
+ });
+ }
+ haveMetadata({
+ startingState,
+ playlist
+ }) {
+ this.state = 'HAVE_METADATA';
+ this.loadedPlaylists_[playlist.id] = playlist;
+ this.mediaRequest_ = null; // This will trigger loadedplaylist
+
+ this.refreshMedia_(playlist.id); // fire loadedmetadata the first time a media playlist is loaded
+ // to resolve setup of media groups
+
+ if (startingState === 'HAVE_MAIN_MANIFEST') {
+ this.trigger('loadedmetadata');
+ } else {
+ // trigger media change if the active media has been updated
+ this.trigger('mediachange');
+ }
+ }
+ pause() {
+ if (this.mainPlaylistLoader_.createMupOnMedia_) {
+ this.off('loadedmetadata', this.mainPlaylistLoader_.createMupOnMedia_);
+ this.mainPlaylistLoader_.createMupOnMedia_ = null;
+ }
+ this.stopRequest();
+ window.clearTimeout(this.mediaUpdateTimeout);
+ this.mediaUpdateTimeout = null;
+ if (this.isMain_) {
+ window.clearTimeout(this.mainPlaylistLoader_.minimumUpdatePeriodTimeout_);
+ this.mainPlaylistLoader_.minimumUpdatePeriodTimeout_ = null;
+ }
+ if (this.state === 'HAVE_NOTHING') {
+ // If we pause the loader before any data has been retrieved, its as if we never
+ // started, so reset to an unstarted state.
+ this.started = false;
+ }
+ }
+ load(isFinalRendition) {
+ window.clearTimeout(this.mediaUpdateTimeout);
+ this.mediaUpdateTimeout = null;
+ const media = this.media();
+ if (isFinalRendition) {
+ const delay = media ? media.targetDuration / 2 * 1000 : 5 * 1000;
+ this.mediaUpdateTimeout = window.setTimeout(() => this.load(), delay);
+ return;
+ } // because the playlists are internal to the manifest, load should either load the
+ // main manifest, or do nothing but trigger an event
+
+ if (!this.started) {
+ this.start();
+ return;
+ }
+ if (media && !media.endList) {
+ // Check to see if this is the main loader and the MUP was cleared (this happens
+ // when the loader was paused). `media` should be set at this point since one is always
+ // set during `start()`.
+ if (this.isMain_ && !this.minimumUpdatePeriodTimeout_) {
+ // Trigger minimumUpdatePeriod to refresh the main manifest
+ this.trigger('minimumUpdatePeriod'); // Since there was no prior minimumUpdatePeriodTimeout it should be recreated
+
+ this.updateMinimumUpdatePeriodTimeout_();
+ }
+ this.trigger('mediaupdatetimeout');
+ } else {
+ this.trigger('loadedplaylist');
+ }
+ }
+ start() {
+ this.started = true; // We don't need to request the main manifest again
+ // Call this asynchronously to match the xhr request behavior below
+
+ if (!this.isMain_) {
+ this.mediaRequest_ = window.setTimeout(() => this.haveMain_(), 0);
+ return;
+ }
+ this.requestMain_((req, mainChanged) => {
+ this.haveMain_();
+ if (!this.hasPendingRequest() && !this.media_) {
+ this.media(this.mainPlaylistLoader_.main.playlists[0]);
+ }
+ });
+ }
+ requestMain_(cb) {
+ this.request = this.vhs_.xhr({
+ uri: this.mainPlaylistLoader_.srcUrl,
+ withCredentials: this.withCredentials,
+ requestType: 'dash-manifest'
+ }, (error, req) => {
+ if (this.requestErrored_(error, req)) {
+ if (this.state === 'HAVE_NOTHING') {
+ this.started = false;
+ }
+ return;
+ }
+ const mainChanged = req.responseText !== this.mainPlaylistLoader_.mainXml_;
+ this.mainPlaylistLoader_.mainXml_ = req.responseText;
+ if (req.responseHeaders && req.responseHeaders.date) {
+ this.mainLoaded_ = Date.parse(req.responseHeaders.date);
+ } else {
+ this.mainLoaded_ = Date.now();
+ }
+ this.mainPlaylistLoader_.srcUrl = resolveManifestRedirect(this.mainPlaylistLoader_.srcUrl, req);
+ if (mainChanged) {
+ this.handleMain_();
+ this.syncClientServerClock_(() => {
+ return cb(req, mainChanged);
+ });
+ return;
+ }
+ return cb(req, mainChanged);
+ });
+ }
+ /**
+ * Parses the main xml for UTCTiming node to sync the client clock to the server
+ * clock. If the UTCTiming node requires a HEAD or GET request, that request is made.
+ *
+ * @param {Function} done
+ * Function to call when clock sync has completed
+ */
+
+ syncClientServerClock_(done) {
+ const utcTiming = parseUTCTiming(this.mainPlaylistLoader_.mainXml_); // No UTCTiming element found in the mpd. Use Date header from mpd request as the
+ // server clock
+
+ if (utcTiming === null) {
+ this.mainPlaylistLoader_.clientOffset_ = this.mainLoaded_ - Date.now();
+ return done();
+ }
+ if (utcTiming.method === 'DIRECT') {
+ this.mainPlaylistLoader_.clientOffset_ = utcTiming.value - Date.now();
+ return done();
+ }
+ this.request = this.vhs_.xhr({
+ uri: resolveUrl(this.mainPlaylistLoader_.srcUrl, utcTiming.value),
+ method: utcTiming.method,
+ withCredentials: this.withCredentials,
+ requestType: 'dash-clock-sync'
+ }, (error, req) => {
+ // disposed
+ if (!this.request) {
+ return;
+ }
+ if (error) {
+ // sync request failed, fall back to using date header from mpd
+ // TODO: log warning
+ this.mainPlaylistLoader_.clientOffset_ = this.mainLoaded_ - Date.now();
+ return done();
+ }
+ let serverTime;
+ if (utcTiming.method === 'HEAD') {
+ if (!req.responseHeaders || !req.responseHeaders.date) {
+ // expected date header not preset, fall back to using date header from mpd
+ // TODO: log warning
+ serverTime = this.mainLoaded_;
+ } else {
+ serverTime = Date.parse(req.responseHeaders.date);
+ }
+ } else {
+ serverTime = Date.parse(req.responseText);
+ }
+ this.mainPlaylistLoader_.clientOffset_ = serverTime - Date.now();
+ done();
+ });
+ }
+ haveMain_() {
+ this.state = 'HAVE_MAIN_MANIFEST';
+ if (this.isMain_) {
+ // We have the main playlist at this point, so
+ // trigger this to allow PlaylistController
+ // to make an initial playlist selection
+ this.trigger('loadedplaylist');
+ } else if (!this.media_) {
+ // no media playlist was specifically selected so select
+ // the one the child playlist loader was created with
+ this.media(this.childPlaylist_);
+ }
+ }
+ handleMain_() {
+ // clear media request
+ this.mediaRequest_ = null;
+ const oldMain = this.mainPlaylistLoader_.main;
+ let newMain = parseMainXml({
+ mainXml: this.mainPlaylistLoader_.mainXml_,
+ srcUrl: this.mainPlaylistLoader_.srcUrl,
+ clientOffset: this.mainPlaylistLoader_.clientOffset_,
+ sidxMapping: this.mainPlaylistLoader_.sidxMapping_,
+ previousManifest: oldMain
+ }); // if we have an old main to compare the new main against
+
+ if (oldMain) {
+ newMain = updateMain(oldMain, newMain, this.mainPlaylistLoader_.sidxMapping_);
+ } // only update main if we have a new main
+
+ this.mainPlaylistLoader_.main = newMain ? newMain : oldMain;
+ const location = this.mainPlaylistLoader_.main.locations && this.mainPlaylistLoader_.main.locations[0];
+ if (location && location !== this.mainPlaylistLoader_.srcUrl) {
+ this.mainPlaylistLoader_.srcUrl = location;
+ }
+ if (!oldMain || newMain && newMain.minimumUpdatePeriod !== oldMain.minimumUpdatePeriod) {
+ this.updateMinimumUpdatePeriodTimeout_();
+ }
+ this.addEventStreamToMetadataTrack_(newMain);
+ return Boolean(newMain);
+ }
+ updateMinimumUpdatePeriodTimeout_() {
+ const mpl = this.mainPlaylistLoader_; // cancel any pending creation of mup on media
+ // a new one will be added if needed.
+
+ if (mpl.createMupOnMedia_) {
+ mpl.off('loadedmetadata', mpl.createMupOnMedia_);
+ mpl.createMupOnMedia_ = null;
+ } // clear any pending timeouts
+
+ if (mpl.minimumUpdatePeriodTimeout_) {
+ window.clearTimeout(mpl.minimumUpdatePeriodTimeout_);
+ mpl.minimumUpdatePeriodTimeout_ = null;
+ }
+ let mup = mpl.main && mpl.main.minimumUpdatePeriod; // If the minimumUpdatePeriod has a value of 0, that indicates that the current
+ // MPD has no future validity, so a new one will need to be acquired when new
+ // media segments are to be made available. Thus, we use the target duration
+ // in this case
+
+ if (mup === 0) {
+ if (mpl.media()) {
+ mup = mpl.media().targetDuration * 1000;
+ } else {
+ mpl.createMupOnMedia_ = mpl.updateMinimumUpdatePeriodTimeout_;
+ mpl.one('loadedmetadata', mpl.createMupOnMedia_);
+ }
+ } // if minimumUpdatePeriod is invalid or <= zero, which
+ // can happen when a live video becomes VOD. skip timeout
+ // creation.
+
+ if (typeof mup !== 'number' || mup <= 0) {
+ if (mup < 0) {
+ this.logger_(`found invalid minimumUpdatePeriod of ${mup}, not setting a timeout`);
+ }
+ return;
+ }
+ this.createMUPTimeout_(mup);
+ }
+ createMUPTimeout_(mup) {
+ const mpl = this.mainPlaylistLoader_;
+ mpl.minimumUpdatePeriodTimeout_ = window.setTimeout(() => {
+ mpl.minimumUpdatePeriodTimeout_ = null;
+ mpl.trigger('minimumUpdatePeriod');
+ mpl.createMUPTimeout_(mup);
+ }, mup);
+ }
+ /**
+ * Sends request to refresh the main xml and updates the parsed main manifest
+ */
+
+ refreshXml_() {
+ this.requestMain_((req, mainChanged) => {
+ if (!mainChanged) {
+ return;
+ }
+ if (this.media_) {
+ this.media_ = this.mainPlaylistLoader_.main.playlists[this.media_.id];
+ } // This will filter out updated sidx info from the mapping
+
+ this.mainPlaylistLoader_.sidxMapping_ = filterChangedSidxMappings(this.mainPlaylistLoader_.main, this.mainPlaylistLoader_.sidxMapping_);
+ this.addSidxSegments_(this.media(), this.state, sidxChanged => {
+ // TODO: do we need to reload the current playlist?
+ this.refreshMedia_(this.media().id);
+ });
+ });
+ }
+ /**
+ * Refreshes the media playlist by re-parsing the main xml and updating playlist
+ * references. If this is an alternate loader, the updated parsed manifest is retrieved
+ * from the main loader.
+ */
+
+ refreshMedia_(mediaID) {
+ if (!mediaID) {
+ throw new Error('refreshMedia_ must take a media id');
+ } // for main we have to reparse the main xml
+ // to re-create segments based on current timing values
+ // which may change media. We only skip updating the main manifest
+ // if this is the first time this.media_ is being set.
+ // as main was just parsed in that case.
+
+ if (this.media_ && this.isMain_) {
+ this.handleMain_();
+ }
+ const playlists = this.mainPlaylistLoader_.main.playlists;
+ const mediaChanged = !this.media_ || this.media_ !== playlists[mediaID];
+ if (mediaChanged) {
+ this.media_ = playlists[mediaID];
+ } else {
+ this.trigger('playlistunchanged');
+ }
+ if (!this.mediaUpdateTimeout) {
+ const createMediaUpdateTimeout = () => {
+ if (this.media().endList) {
+ return;
+ }
+ this.mediaUpdateTimeout = window.setTimeout(() => {
+ this.trigger('mediaupdatetimeout');
+ createMediaUpdateTimeout();
+ }, refreshDelay(this.media(), Boolean(mediaChanged)));
+ };
+ createMediaUpdateTimeout();
+ }
+ this.trigger('loadedplaylist');
+ }
+ /**
+ * Takes eventstream data from a parsed DASH manifest and adds it to the metadata text track.
+ *
+ * @param {manifest} newMain the newly parsed manifest
+ */
+
+ addEventStreamToMetadataTrack_(newMain) {
+ // Only add new event stream metadata if we have a new manifest.
+ if (newMain && this.mainPlaylistLoader_.main.eventStream) {
+ // convert EventStream to ID3-like data.
+ const metadataArray = this.mainPlaylistLoader_.main.eventStream.map(eventStreamNode => {
+ return {
+ cueTime: eventStreamNode.start,
+ frames: [{
+ data: eventStreamNode.messageData
+ }]
+ };
+ });
+ this.addMetadataToTextTrack('EventStream', metadataArray, this.mainPlaylistLoader_.main.duration);
+ }
+ }
+ /**
+ * Returns the key ID set from a playlist
+ *
+ * @param {playlist} playlist to fetch the key ID set from.
+ * @return a Set of 32 digit hex strings that represent the unique keyIds for that playlist.
+ */
+
+ getKeyIdSet(playlist) {
+ if (playlist.contentProtection) {
+ const keyIds = new Set();
+ for (const keysystem in playlist.contentProtection) {
+ const defaultKID = playlist.contentProtection[keysystem].attributes['cenc:default_KID'];
+ if (defaultKID) {
+ // DASH keyIds are separated by dashes.
+ keyIds.add(defaultKID.replace(/-/g, '').toLowerCase());
+ }
+ }
+ return keyIds;
+ }
+ }
+ }
+ var Config = {
+ GOAL_BUFFER_LENGTH: 30,
+ MAX_GOAL_BUFFER_LENGTH: 60,
+ BACK_BUFFER_LENGTH: 30,
+ GOAL_BUFFER_LENGTH_RATE: 1,
+ // 0.5 MB/s
+ INITIAL_BANDWIDTH: 4194304,
+ // A fudge factor to apply to advertised playlist bitrates to account for
+ // temporary flucations in client bandwidth
+ BANDWIDTH_VARIANCE: 1.2,
+ // How much of the buffer must be filled before we consider upswitching
+ BUFFER_LOW_WATER_LINE: 0,
+ MAX_BUFFER_LOW_WATER_LINE: 30,
+ // TODO: Remove this when experimentalBufferBasedABR is removed
+ EXPERIMENTAL_MAX_BUFFER_LOW_WATER_LINE: 16,
+ BUFFER_LOW_WATER_LINE_RATE: 1,
+ // If the buffer is greater than the high water line, we won't switch down
+ BUFFER_HIGH_WATER_LINE: 30
+ };
+ const stringToArrayBuffer = string => {
+ const view = new Uint8Array(new ArrayBuffer(string.length));
+ for (let i = 0; i < string.length; i++) {
+ view[i] = string.charCodeAt(i);
+ }
+ return view.buffer;
+ };
+
+ /* global Blob, BlobBuilder, Worker */
+ // unify worker interface
+ const browserWorkerPolyFill = function (workerObj) {
+ // node only supports on/off
+ workerObj.on = workerObj.addEventListener;
+ workerObj.off = workerObj.removeEventListener;
+ return workerObj;
+ };
+ const createObjectURL = function (str) {
+ try {
+ return URL.createObjectURL(new Blob([str], {
+ type: 'application/javascript'
+ }));
+ } catch (e) {
+ const blob = new BlobBuilder();
+ blob.append(str);
+ return URL.createObjectURL(blob.getBlob());
+ }
+ };
+ const factory = function (code) {
+ return function () {
+ const objectUrl = createObjectURL(code);
+ const worker = browserWorkerPolyFill(new Worker(objectUrl));
+ worker.objURL = objectUrl;
+ const terminate = worker.terminate;
+ worker.on = worker.addEventListener;
+ worker.off = worker.removeEventListener;
+ worker.terminate = function () {
+ URL.revokeObjectURL(objectUrl);
+ return terminate.call(this);
+ };
+ return worker;
+ };
+ };
+ const transform = function (code) {
+ return `var browserWorkerPolyFill = ${browserWorkerPolyFill.toString()};\n` + 'browserWorkerPolyFill(self);\n' + code;
+ };
+ const getWorkerString = function (fn) {
+ return fn.toString().replace(/^function.+?{/, '').slice(0, -1);
+ };
+
+ /* rollup-plugin-worker-factory start for worker!/home/runner/work/http-streaming/http-streaming/src/transmuxer-worker.js */
+ const workerCode$1 = transform(getWorkerString(function () {
+ var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};
+ /**
+ * mux.js
+ *
+ * Copyright (c) Brightcove
+ * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
+ *
+ * A lightweight readable stream implemention that handles event dispatching.
+ * Objects that inherit from streams should call init in their constructors.
+ */
+
+ var Stream$8 = function () {
+ this.init = function () {
+ var listeners = {};
+ /**
+ * Add a listener for a specified event type.
+ * @param type {string} the event name
+ * @param listener {function} the callback to be invoked when an event of
+ * the specified type occurs
+ */
+
+ this.on = function (type, listener) {
+ if (!listeners[type]) {
+ listeners[type] = [];
+ }
+ listeners[type] = listeners[type].concat(listener);
+ };
+ /**
+ * Remove a listener for a specified event type.
+ * @param type {string} the event name
+ * @param listener {function} a function previously registered for this
+ * type of event through `on`
+ */
+
+ this.off = function (type, listener) {
+ var index;
+ if (!listeners[type]) {
+ return false;
+ }
+ index = listeners[type].indexOf(listener);
+ listeners[type] = listeners[type].slice();
+ listeners[type].splice(index, 1);
+ return index > -1;
+ };
+ /**
+ * Trigger an event of the specified type on this stream. Any additional
+ * arguments to this function are passed as parameters to event listeners.
+ * @param type {string} the event name
+ */
+
+ this.trigger = function (type) {
+ var callbacks, i, length, args;
+ callbacks = listeners[type];
+ if (!callbacks) {
+ return;
+ } // Slicing the arguments on every invocation of this method
+ // can add a significant amount of overhead. Avoid the
+ // intermediate object creation for the common case of a
+ // single callback argument
+
+ if (arguments.length === 2) {
+ length = callbacks.length;
+ for (i = 0; i < length; ++i) {
+ callbacks[i].call(this, arguments[1]);
+ }
+ } else {
+ args = [];
+ i = arguments.length;
+ for (i = 1; i < arguments.length; ++i) {
+ args.push(arguments[i]);
+ }
+ length = callbacks.length;
+ for (i = 0; i < length; ++i) {
+ callbacks[i].apply(this, args);
+ }
+ }
+ };
+ /**
+ * Destroys the stream and cleans up.
+ */
+
+ this.dispose = function () {
+ listeners = {};
+ };
+ };
+ };
+ /**
+ * Forwards all `data` events on this stream to the destination stream. The
+ * destination stream should provide a method `push` to receive the data
+ * events as they arrive.
+ * @param destination {stream} the stream that will receive all `data` events
+ * @param autoFlush {boolean} if false, we will not call `flush` on the destination
+ * when the current stream emits a 'done' event
+ * @see http://nodejs.org/api/stream.html#stream_readable_pipe_destination_options
+ */
+
+ Stream$8.prototype.pipe = function (destination) {
+ this.on('data', function (data) {
+ destination.push(data);
+ });
+ this.on('done', function (flushSource) {
+ destination.flush(flushSource);
+ });
+ this.on('partialdone', function (flushSource) {
+ destination.partialFlush(flushSource);
+ });
+ this.on('endedtimeline', function (flushSource) {
+ destination.endTimeline(flushSource);
+ });
+ this.on('reset', function (flushSource) {
+ destination.reset(flushSource);
+ });
+ return destination;
+ }; // Default stream functions that are expected to be overridden to perform
+ // actual work. These are provided by the prototype as a sort of no-op
+ // implementation so that we don't have to check for their existence in the
+ // `pipe` function above.
+
+ Stream$8.prototype.push = function (data) {
+ this.trigger('data', data);
+ };
+ Stream$8.prototype.flush = function (flushSource) {
+ this.trigger('done', flushSource);
+ };
+ Stream$8.prototype.partialFlush = function (flushSource) {
+ this.trigger('partialdone', flushSource);
+ };
+ Stream$8.prototype.endTimeline = function (flushSource) {
+ this.trigger('endedtimeline', flushSource);
+ };
+ Stream$8.prototype.reset = function (flushSource) {
+ this.trigger('reset', flushSource);
+ };
+ var stream = Stream$8;
+ var MAX_UINT32$1 = Math.pow(2, 32);
+ var getUint64$3 = function (uint8) {
+ var dv = new DataView(uint8.buffer, uint8.byteOffset, uint8.byteLength);
+ var value;
+ if (dv.getBigUint64) {
+ value = dv.getBigUint64(0);
+ if (value < Number.MAX_SAFE_INTEGER) {
+ return Number(value);
+ }
+ return value;
+ }
+ return dv.getUint32(0) * MAX_UINT32$1 + dv.getUint32(4);
+ };
+ var numbers = {
+ getUint64: getUint64$3,
+ MAX_UINT32: MAX_UINT32$1
+ };
+ /**
+ * mux.js
+ *
+ * Copyright (c) Brightcove
+ * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
+ *
+ * Functions that generate fragmented MP4s suitable for use with Media
+ * Source Extensions.
+ */
+
+ var MAX_UINT32 = numbers.MAX_UINT32;
+ var box, dinf, esds, ftyp, mdat, mfhd, minf, moof, moov, mvex, mvhd, trak, tkhd, mdia, mdhd, hdlr, sdtp, stbl, stsd, traf, trex, trun$1, types, MAJOR_BRAND, MINOR_VERSION, AVC1_BRAND, VIDEO_HDLR, AUDIO_HDLR, HDLR_TYPES, VMHD, SMHD, DREF, STCO, STSC, STSZ, STTS; // pre-calculate constants
+
+ (function () {
+ var i;
+ types = {
+ avc1: [],
+ // codingname
+ avcC: [],
+ btrt: [],
+ dinf: [],
+ dref: [],
+ esds: [],
+ ftyp: [],
+ hdlr: [],
+ mdat: [],
+ mdhd: [],
+ mdia: [],
+ mfhd: [],
+ minf: [],
+ moof: [],
+ moov: [],
+ mp4a: [],
+ // codingname
+ mvex: [],
+ mvhd: [],
+ pasp: [],
+ sdtp: [],
+ smhd: [],
+ stbl: [],
+ stco: [],
+ stsc: [],
+ stsd: [],
+ stsz: [],
+ stts: [],
+ styp: [],
+ tfdt: [],
+ tfhd: [],
+ traf: [],
+ trak: [],
+ trun: [],
+ trex: [],
+ tkhd: [],
+ vmhd: []
+ }; // In environments where Uint8Array is undefined (e.g., IE8), skip set up so that we
+ // don't throw an error
+
+ if (typeof Uint8Array === 'undefined') {
+ return;
+ }
+ for (i in types) {
+ if (types.hasOwnProperty(i)) {
+ types[i] = [i.charCodeAt(0), i.charCodeAt(1), i.charCodeAt(2), i.charCodeAt(3)];
+ }
+ }
+ MAJOR_BRAND = new Uint8Array(['i'.charCodeAt(0), 's'.charCodeAt(0), 'o'.charCodeAt(0), 'm'.charCodeAt(0)]);
+ AVC1_BRAND = new Uint8Array(['a'.charCodeAt(0), 'v'.charCodeAt(0), 'c'.charCodeAt(0), '1'.charCodeAt(0)]);
+ MINOR_VERSION = new Uint8Array([0, 0, 0, 1]);
+ VIDEO_HDLR = new Uint8Array([0x00,
+ // version 0
+ 0x00, 0x00, 0x00,
+ // flags
+ 0x00, 0x00, 0x00, 0x00,
+ // pre_defined
+ 0x76, 0x69, 0x64, 0x65,
+ // handler_type: 'vide'
+ 0x00, 0x00, 0x00, 0x00,
+ // reserved
+ 0x00, 0x00, 0x00, 0x00,
+ // reserved
+ 0x00, 0x00, 0x00, 0x00,
+ // reserved
+ 0x56, 0x69, 0x64, 0x65, 0x6f, 0x48, 0x61, 0x6e, 0x64, 0x6c, 0x65, 0x72, 0x00 // name: 'VideoHandler'
+ ]);
+
+ AUDIO_HDLR = new Uint8Array([0x00,
+ // version 0
+ 0x00, 0x00, 0x00,
+ // flags
+ 0x00, 0x00, 0x00, 0x00,
+ // pre_defined
+ 0x73, 0x6f, 0x75, 0x6e,
+ // handler_type: 'soun'
+ 0x00, 0x00, 0x00, 0x00,
+ // reserved
+ 0x00, 0x00, 0x00, 0x00,
+ // reserved
+ 0x00, 0x00, 0x00, 0x00,
+ // reserved
+ 0x53, 0x6f, 0x75, 0x6e, 0x64, 0x48, 0x61, 0x6e, 0x64, 0x6c, 0x65, 0x72, 0x00 // name: 'SoundHandler'
+ ]);
+
+ HDLR_TYPES = {
+ video: VIDEO_HDLR,
+ audio: AUDIO_HDLR
+ };
+ DREF = new Uint8Array([0x00,
+ // version 0
+ 0x00, 0x00, 0x00,
+ // flags
+ 0x00, 0x00, 0x00, 0x01,
+ // entry_count
+ 0x00, 0x00, 0x00, 0x0c,
+ // entry_size
+ 0x75, 0x72, 0x6c, 0x20,
+ // 'url' type
+ 0x00,
+ // version 0
+ 0x00, 0x00, 0x01 // entry_flags
+ ]);
+
+ SMHD = new Uint8Array([0x00,
+ // version
+ 0x00, 0x00, 0x00,
+ // flags
+ 0x00, 0x00,
+ // balance, 0 means centered
+ 0x00, 0x00 // reserved
+ ]);
+
+ STCO = new Uint8Array([0x00,
+ // version
+ 0x00, 0x00, 0x00,
+ // flags
+ 0x00, 0x00, 0x00, 0x00 // entry_count
+ ]);
+
+ STSC = STCO;
+ STSZ = new Uint8Array([0x00,
+ // version
+ 0x00, 0x00, 0x00,
+ // flags
+ 0x00, 0x00, 0x00, 0x00,
+ // sample_size
+ 0x00, 0x00, 0x00, 0x00 // sample_count
+ ]);
+
+ STTS = STCO;
+ VMHD = new Uint8Array([0x00,
+ // version
+ 0x00, 0x00, 0x01,
+ // flags
+ 0x00, 0x00,
+ // graphicsmode
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 // opcolor
+ ]);
+ })();
+
+ box = function (type) {
+ var payload = [],
+ size = 0,
+ i,
+ result,
+ view;
+ for (i = 1; i < arguments.length; i++) {
+ payload.push(arguments[i]);
+ }
+ i = payload.length; // calculate the total size we need to allocate
+
+ while (i--) {
+ size += payload[i].byteLength;
+ }
+ result = new Uint8Array(size + 8);
+ view = new DataView(result.buffer, result.byteOffset, result.byteLength);
+ view.setUint32(0, result.byteLength);
+ result.set(type, 4); // copy the payload into the result
+
+ for (i = 0, size = 8; i < payload.length; i++) {
+ result.set(payload[i], size);
+ size += payload[i].byteLength;
+ }
+ return result;
+ };
+ dinf = function () {
+ return box(types.dinf, box(types.dref, DREF));
+ };
+ esds = function (track) {
+ return box(types.esds, new Uint8Array([0x00,
+ // version
+ 0x00, 0x00, 0x00,
+ // flags
+ // ES_Descriptor
+ 0x03,
+ // tag, ES_DescrTag
+ 0x19,
+ // length
+ 0x00, 0x00,
+ // ES_ID
+ 0x00,
+ // streamDependenceFlag, URL_flag, reserved, streamPriority
+ // DecoderConfigDescriptor
+ 0x04,
+ // tag, DecoderConfigDescrTag
+ 0x11,
+ // length
+ 0x40,
+ // object type
+ 0x15,
+ // streamType
+ 0x00, 0x06, 0x00,
+ // bufferSizeDB
+ 0x00, 0x00, 0xda, 0xc0,
+ // maxBitrate
+ 0x00, 0x00, 0xda, 0xc0,
+ // avgBitrate
+ // DecoderSpecificInfo
+ 0x05,
+ // tag, DecoderSpecificInfoTag
+ 0x02,
+ // length
+ // ISO/IEC 14496-3, AudioSpecificConfig
+ // for samplingFrequencyIndex see ISO/IEC 13818-7:2006, 8.1.3.2.2, Table 35
+ track.audioobjecttype << 3 | track.samplingfrequencyindex >>> 1, track.samplingfrequencyindex << 7 | track.channelcount << 3, 0x06, 0x01, 0x02 // GASpecificConfig
+ ]));
+ };
+
+ ftyp = function () {
+ return box(types.ftyp, MAJOR_BRAND, MINOR_VERSION, MAJOR_BRAND, AVC1_BRAND);
+ };
+ hdlr = function (type) {
+ return box(types.hdlr, HDLR_TYPES[type]);
+ };
+ mdat = function (data) {
+ return box(types.mdat, data);
+ };
+ mdhd = function (track) {
+ var result = new Uint8Array([0x00,
+ // version 0
+ 0x00, 0x00, 0x00,
+ // flags
+ 0x00, 0x00, 0x00, 0x02,
+ // creation_time
+ 0x00, 0x00, 0x00, 0x03,
+ // modification_time
+ 0x00, 0x01, 0x5f, 0x90,
+ // timescale, 90,000 "ticks" per second
+ track.duration >>> 24 & 0xFF, track.duration >>> 16 & 0xFF, track.duration >>> 8 & 0xFF, track.duration & 0xFF,
+ // duration
+ 0x55, 0xc4,
+ // 'und' language (undetermined)
+ 0x00, 0x00]); // Use the sample rate from the track metadata, when it is
+ // defined. The sample rate can be parsed out of an ADTS header, for
+ // instance.
+
+ if (track.samplerate) {
+ result[12] = track.samplerate >>> 24 & 0xFF;
+ result[13] = track.samplerate >>> 16 & 0xFF;
+ result[14] = track.samplerate >>> 8 & 0xFF;
+ result[15] = track.samplerate & 0xFF;
+ }
+ return box(types.mdhd, result);
+ };
+ mdia = function (track) {
+ return box(types.mdia, mdhd(track), hdlr(track.type), minf(track));
+ };
+ mfhd = function (sequenceNumber) {
+ return box(types.mfhd, new Uint8Array([0x00, 0x00, 0x00, 0x00,
+ // flags
+ (sequenceNumber & 0xFF000000) >> 24, (sequenceNumber & 0xFF0000) >> 16, (sequenceNumber & 0xFF00) >> 8, sequenceNumber & 0xFF // sequence_number
+ ]));
+ };
+
+ minf = function (track) {
+ return box(types.minf, track.type === 'video' ? box(types.vmhd, VMHD) : box(types.smhd, SMHD), dinf(), stbl(track));
+ };
+ moof = function (sequenceNumber, tracks) {
+ var trackFragments = [],
+ i = tracks.length; // build traf boxes for each track fragment
+
+ while (i--) {
+ trackFragments[i] = traf(tracks[i]);
+ }
+ return box.apply(null, [types.moof, mfhd(sequenceNumber)].concat(trackFragments));
+ };
+ /**
+ * Returns a movie box.
+ * @param tracks {array} the tracks associated with this movie
+ * @see ISO/IEC 14496-12:2012(E), section 8.2.1
+ */
+
+ moov = function (tracks) {
+ var i = tracks.length,
+ boxes = [];
+ while (i--) {
+ boxes[i] = trak(tracks[i]);
+ }
+ return box.apply(null, [types.moov, mvhd(0xffffffff)].concat(boxes).concat(mvex(tracks)));
+ };
+ mvex = function (tracks) {
+ var i = tracks.length,
+ boxes = [];
+ while (i--) {
+ boxes[i] = trex(tracks[i]);
+ }
+ return box.apply(null, [types.mvex].concat(boxes));
+ };
+ mvhd = function (duration) {
+ var bytes = new Uint8Array([0x00,
+ // version 0
+ 0x00, 0x00, 0x00,
+ // flags
+ 0x00, 0x00, 0x00, 0x01,
+ // creation_time
+ 0x00, 0x00, 0x00, 0x02,
+ // modification_time
+ 0x00, 0x01, 0x5f, 0x90,
+ // timescale, 90,000 "ticks" per second
+ (duration & 0xFF000000) >> 24, (duration & 0xFF0000) >> 16, (duration & 0xFF00) >> 8, duration & 0xFF,
+ // duration
+ 0x00, 0x01, 0x00, 0x00,
+ // 1.0 rate
+ 0x01, 0x00,
+ // 1.0 volume
+ 0x00, 0x00,
+ // reserved
+ 0x00, 0x00, 0x00, 0x00,
+ // reserved
+ 0x00, 0x00, 0x00, 0x00,
+ // reserved
+ 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00,
+ // transformation: unity matrix
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ // pre_defined
+ 0xff, 0xff, 0xff, 0xff // next_track_ID
+ ]);
+
+ return box(types.mvhd, bytes);
+ };
+ sdtp = function (track) {
+ var samples = track.samples || [],
+ bytes = new Uint8Array(4 + samples.length),
+ flags,
+ i; // leave the full box header (4 bytes) all zero
+ // write the sample table
+
+ for (i = 0; i < samples.length; i++) {
+ flags = samples[i].flags;
+ bytes[i + 4] = flags.dependsOn << 4 | flags.isDependedOn << 2 | flags.hasRedundancy;
+ }
+ return box(types.sdtp, bytes);
+ };
+ stbl = function (track) {
+ return box(types.stbl, stsd(track), box(types.stts, STTS), box(types.stsc, STSC), box(types.stsz, STSZ), box(types.stco, STCO));
+ };
+ (function () {
+ var videoSample, audioSample;
+ stsd = function (track) {
+ return box(types.stsd, new Uint8Array([0x00,
+ // version 0
+ 0x00, 0x00, 0x00,
+ // flags
+ 0x00, 0x00, 0x00, 0x01]), track.type === 'video' ? videoSample(track) : audioSample(track));
+ };
+ videoSample = function (track) {
+ var sps = track.sps || [],
+ pps = track.pps || [],
+ sequenceParameterSets = [],
+ pictureParameterSets = [],
+ i,
+ avc1Box; // assemble the SPSs
+
+ for (i = 0; i < sps.length; i++) {
+ sequenceParameterSets.push((sps[i].byteLength & 0xFF00) >>> 8);
+ sequenceParameterSets.push(sps[i].byteLength & 0xFF); // sequenceParameterSetLength
+
+ sequenceParameterSets = sequenceParameterSets.concat(Array.prototype.slice.call(sps[i])); // SPS
+ } // assemble the PPSs
+
+ for (i = 0; i < pps.length; i++) {
+ pictureParameterSets.push((pps[i].byteLength & 0xFF00) >>> 8);
+ pictureParameterSets.push(pps[i].byteLength & 0xFF);
+ pictureParameterSets = pictureParameterSets.concat(Array.prototype.slice.call(pps[i]));
+ }
+ avc1Box = [types.avc1, new Uint8Array([0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ // reserved
+ 0x00, 0x01,
+ // data_reference_index
+ 0x00, 0x00,
+ // pre_defined
+ 0x00, 0x00,
+ // reserved
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ // pre_defined
+ (track.width & 0xff00) >> 8, track.width & 0xff,
+ // width
+ (track.height & 0xff00) >> 8, track.height & 0xff,
+ // height
+ 0x00, 0x48, 0x00, 0x00,
+ // horizresolution
+ 0x00, 0x48, 0x00, 0x00,
+ // vertresolution
+ 0x00, 0x00, 0x00, 0x00,
+ // reserved
+ 0x00, 0x01,
+ // frame_count
+ 0x13, 0x76, 0x69, 0x64, 0x65, 0x6f, 0x6a, 0x73, 0x2d, 0x63, 0x6f, 0x6e, 0x74, 0x72, 0x69, 0x62, 0x2d, 0x68, 0x6c, 0x73, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ // compressorname
+ 0x00, 0x18,
+ // depth = 24
+ 0x11, 0x11 // pre_defined = -1
+ ]), box(types.avcC, new Uint8Array([0x01,
+ // configurationVersion
+ track.profileIdc,
+ // AVCProfileIndication
+ track.profileCompatibility,
+ // profile_compatibility
+ track.levelIdc,
+ // AVCLevelIndication
+ 0xff // lengthSizeMinusOne, hard-coded to 4 bytes
+ ].concat([sps.length],
+ // numOfSequenceParameterSets
+ sequenceParameterSets,
+ // "SPS"
+ [pps.length],
+ // numOfPictureParameterSets
+ pictureParameterSets // "PPS"
+ ))), box(types.btrt, new Uint8Array([0x00, 0x1c, 0x9c, 0x80,
+ // bufferSizeDB
+ 0x00, 0x2d, 0xc6, 0xc0,
+ // maxBitrate
+ 0x00, 0x2d, 0xc6, 0xc0 // avgBitrate
+ ]))];
+
+ if (track.sarRatio) {
+ var hSpacing = track.sarRatio[0],
+ vSpacing = track.sarRatio[1];
+ avc1Box.push(box(types.pasp, new Uint8Array([(hSpacing & 0xFF000000) >> 24, (hSpacing & 0xFF0000) >> 16, (hSpacing & 0xFF00) >> 8, hSpacing & 0xFF, (vSpacing & 0xFF000000) >> 24, (vSpacing & 0xFF0000) >> 16, (vSpacing & 0xFF00) >> 8, vSpacing & 0xFF])));
+ }
+ return box.apply(null, avc1Box);
+ };
+ audioSample = function (track) {
+ return box(types.mp4a, new Uint8Array([
+ // SampleEntry, ISO/IEC 14496-12
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ // reserved
+ 0x00, 0x01,
+ // data_reference_index
+ // AudioSampleEntry, ISO/IEC 14496-12
+ 0x00, 0x00, 0x00, 0x00,
+ // reserved
+ 0x00, 0x00, 0x00, 0x00,
+ // reserved
+ (track.channelcount & 0xff00) >> 8, track.channelcount & 0xff,
+ // channelcount
+ (track.samplesize & 0xff00) >> 8, track.samplesize & 0xff,
+ // samplesize
+ 0x00, 0x00,
+ // pre_defined
+ 0x00, 0x00,
+ // reserved
+ (track.samplerate & 0xff00) >> 8, track.samplerate & 0xff, 0x00, 0x00 // samplerate, 16.16
+ // MP4AudioSampleEntry, ISO/IEC 14496-14
+ ]), esds(track));
+ };
+ })();
+ tkhd = function (track) {
+ var result = new Uint8Array([0x00,
+ // version 0
+ 0x00, 0x00, 0x07,
+ // flags
+ 0x00, 0x00, 0x00, 0x00,
+ // creation_time
+ 0x00, 0x00, 0x00, 0x00,
+ // modification_time
+ (track.id & 0xFF000000) >> 24, (track.id & 0xFF0000) >> 16, (track.id & 0xFF00) >> 8, track.id & 0xFF,
+ // track_ID
+ 0x00, 0x00, 0x00, 0x00,
+ // reserved
+ (track.duration & 0xFF000000) >> 24, (track.duration & 0xFF0000) >> 16, (track.duration & 0xFF00) >> 8, track.duration & 0xFF,
+ // duration
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ // reserved
+ 0x00, 0x00,
+ // layer
+ 0x00, 0x00,
+ // alternate_group
+ 0x01, 0x00,
+ // non-audio track volume
+ 0x00, 0x00,
+ // reserved
+ 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00,
+ // transformation: unity matrix
+ (track.width & 0xFF00) >> 8, track.width & 0xFF, 0x00, 0x00,
+ // width
+ (track.height & 0xFF00) >> 8, track.height & 0xFF, 0x00, 0x00 // height
+ ]);
+
+ return box(types.tkhd, result);
+ };
+ /**
+ * Generate a track fragment (traf) box. A traf box collects metadata
+ * about tracks in a movie fragment (moof) box.
+ */
+
+ traf = function (track) {
+ var trackFragmentHeader, trackFragmentDecodeTime, trackFragmentRun, sampleDependencyTable, dataOffset, upperWordBaseMediaDecodeTime, lowerWordBaseMediaDecodeTime;
+ trackFragmentHeader = box(types.tfhd, new Uint8Array([0x00,
+ // version 0
+ 0x00, 0x00, 0x3a,
+ // flags
+ (track.id & 0xFF000000) >> 24, (track.id & 0xFF0000) >> 16, (track.id & 0xFF00) >> 8, track.id & 0xFF,
+ // track_ID
+ 0x00, 0x00, 0x00, 0x01,
+ // sample_description_index
+ 0x00, 0x00, 0x00, 0x00,
+ // default_sample_duration
+ 0x00, 0x00, 0x00, 0x00,
+ // default_sample_size
+ 0x00, 0x00, 0x00, 0x00 // default_sample_flags
+ ]));
+
+ upperWordBaseMediaDecodeTime = Math.floor(track.baseMediaDecodeTime / MAX_UINT32);
+ lowerWordBaseMediaDecodeTime = Math.floor(track.baseMediaDecodeTime % MAX_UINT32);
+ trackFragmentDecodeTime = box(types.tfdt, new Uint8Array([0x01,
+ // version 1
+ 0x00, 0x00, 0x00,
+ // flags
+ // baseMediaDecodeTime
+ upperWordBaseMediaDecodeTime >>> 24 & 0xFF, upperWordBaseMediaDecodeTime >>> 16 & 0xFF, upperWordBaseMediaDecodeTime >>> 8 & 0xFF, upperWordBaseMediaDecodeTime & 0xFF, lowerWordBaseMediaDecodeTime >>> 24 & 0xFF, lowerWordBaseMediaDecodeTime >>> 16 & 0xFF, lowerWordBaseMediaDecodeTime >>> 8 & 0xFF, lowerWordBaseMediaDecodeTime & 0xFF])); // the data offset specifies the number of bytes from the start of
+ // the containing moof to the first payload byte of the associated
+ // mdat
+
+ dataOffset = 32 +
+ // tfhd
+ 20 +
+ // tfdt
+ 8 +
+ // traf header
+ 16 +
+ // mfhd
+ 8 +
+ // moof header
+ 8; // mdat header
+ // audio tracks require less metadata
+
+ if (track.type === 'audio') {
+ trackFragmentRun = trun$1(track, dataOffset);
+ return box(types.traf, trackFragmentHeader, trackFragmentDecodeTime, trackFragmentRun);
+ } // video tracks should contain an independent and disposable samples
+ // box (sdtp)
+ // generate one and adjust offsets to match
+
+ sampleDependencyTable = sdtp(track);
+ trackFragmentRun = trun$1(track, sampleDependencyTable.length + dataOffset);
+ return box(types.traf, trackFragmentHeader, trackFragmentDecodeTime, trackFragmentRun, sampleDependencyTable);
+ };
+ /**
+ * Generate a track box.
+ * @param track {object} a track definition
+ * @return {Uint8Array} the track box
+ */
+
+ trak = function (track) {
+ track.duration = track.duration || 0xffffffff;
+ return box(types.trak, tkhd(track), mdia(track));
+ };
+ trex = function (track) {
+ var result = new Uint8Array([0x00,
+ // version 0
+ 0x00, 0x00, 0x00,
+ // flags
+ (track.id & 0xFF000000) >> 24, (track.id & 0xFF0000) >> 16, (track.id & 0xFF00) >> 8, track.id & 0xFF,
+ // track_ID
+ 0x00, 0x00, 0x00, 0x01,
+ // default_sample_description_index
+ 0x00, 0x00, 0x00, 0x00,
+ // default_sample_duration
+ 0x00, 0x00, 0x00, 0x00,
+ // default_sample_size
+ 0x00, 0x01, 0x00, 0x01 // default_sample_flags
+ ]); // the last two bytes of default_sample_flags is the sample
+ // degradation priority, a hint about the importance of this sample
+ // relative to others. Lower the degradation priority for all sample
+ // types other than video.
+
+ if (track.type !== 'video') {
+ result[result.length - 1] = 0x00;
+ }
+ return box(types.trex, result);
+ };
+ (function () {
+ var audioTrun, videoTrun, trunHeader; // This method assumes all samples are uniform. That is, if a
+ // duration is present for the first sample, it will be present for
+ // all subsequent samples.
+ // see ISO/IEC 14496-12:2012, Section 8.8.8.1
+
+ trunHeader = function (samples, offset) {
+ var durationPresent = 0,
+ sizePresent = 0,
+ flagsPresent = 0,
+ compositionTimeOffset = 0; // trun flag constants
+
+ if (samples.length) {
+ if (samples[0].duration !== undefined) {
+ durationPresent = 0x1;
+ }
+ if (samples[0].size !== undefined) {
+ sizePresent = 0x2;
+ }
+ if (samples[0].flags !== undefined) {
+ flagsPresent = 0x4;
+ }
+ if (samples[0].compositionTimeOffset !== undefined) {
+ compositionTimeOffset = 0x8;
+ }
+ }
+ return [0x00,
+ // version 0
+ 0x00, durationPresent | sizePresent | flagsPresent | compositionTimeOffset, 0x01,
+ // flags
+ (samples.length & 0xFF000000) >>> 24, (samples.length & 0xFF0000) >>> 16, (samples.length & 0xFF00) >>> 8, samples.length & 0xFF,
+ // sample_count
+ (offset & 0xFF000000) >>> 24, (offset & 0xFF0000) >>> 16, (offset & 0xFF00) >>> 8, offset & 0xFF // data_offset
+ ];
+ };
+
+ videoTrun = function (track, offset) {
+ var bytesOffest, bytes, header, samples, sample, i;
+ samples = track.samples || [];
+ offset += 8 + 12 + 16 * samples.length;
+ header = trunHeader(samples, offset);
+ bytes = new Uint8Array(header.length + samples.length * 16);
+ bytes.set(header);
+ bytesOffest = header.length;
+ for (i = 0; i < samples.length; i++) {
+ sample = samples[i];
+ bytes[bytesOffest++] = (sample.duration & 0xFF000000) >>> 24;
+ bytes[bytesOffest++] = (sample.duration & 0xFF0000) >>> 16;
+ bytes[bytesOffest++] = (sample.duration & 0xFF00) >>> 8;
+ bytes[bytesOffest++] = sample.duration & 0xFF; // sample_duration
+
+ bytes[bytesOffest++] = (sample.size & 0xFF000000) >>> 24;
+ bytes[bytesOffest++] = (sample.size & 0xFF0000) >>> 16;
+ bytes[bytesOffest++] = (sample.size & 0xFF00) >>> 8;
+ bytes[bytesOffest++] = sample.size & 0xFF; // sample_size
+
+ bytes[bytesOffest++] = sample.flags.isLeading << 2 | sample.flags.dependsOn;
+ bytes[bytesOffest++] = sample.flags.isDependedOn << 6 | sample.flags.hasRedundancy << 4 | sample.flags.paddingValue << 1 | sample.flags.isNonSyncSample;
+ bytes[bytesOffest++] = sample.flags.degradationPriority & 0xF0 << 8;
+ bytes[bytesOffest++] = sample.flags.degradationPriority & 0x0F; // sample_flags
+
+ bytes[bytesOffest++] = (sample.compositionTimeOffset & 0xFF000000) >>> 24;
+ bytes[bytesOffest++] = (sample.compositionTimeOffset & 0xFF0000) >>> 16;
+ bytes[bytesOffest++] = (sample.compositionTimeOffset & 0xFF00) >>> 8;
+ bytes[bytesOffest++] = sample.compositionTimeOffset & 0xFF; // sample_composition_time_offset
+ }
+
+ return box(types.trun, bytes);
+ };
+ audioTrun = function (track, offset) {
+ var bytes, bytesOffest, header, samples, sample, i;
+ samples = track.samples || [];
+ offset += 8 + 12 + 8 * samples.length;
+ header = trunHeader(samples, offset);
+ bytes = new Uint8Array(header.length + samples.length * 8);
+ bytes.set(header);
+ bytesOffest = header.length;
+ for (i = 0; i < samples.length; i++) {
+ sample = samples[i];
+ bytes[bytesOffest++] = (sample.duration & 0xFF000000) >>> 24;
+ bytes[bytesOffest++] = (sample.duration & 0xFF0000) >>> 16;
+ bytes[bytesOffest++] = (sample.duration & 0xFF00) >>> 8;
+ bytes[bytesOffest++] = sample.duration & 0xFF; // sample_duration
+
+ bytes[bytesOffest++] = (sample.size & 0xFF000000) >>> 24;
+ bytes[bytesOffest++] = (sample.size & 0xFF0000) >>> 16;
+ bytes[bytesOffest++] = (sample.size & 0xFF00) >>> 8;
+ bytes[bytesOffest++] = sample.size & 0xFF; // sample_size
+ }
+
+ return box(types.trun, bytes);
+ };
+ trun$1 = function (track, offset) {
+ if (track.type === 'audio') {
+ return audioTrun(track, offset);
+ }
+ return videoTrun(track, offset);
+ };
+ })();
+ var mp4Generator = {
+ ftyp: ftyp,
+ mdat: mdat,
+ moof: moof,
+ moov: moov,
+ initSegment: function (tracks) {
+ var fileType = ftyp(),
+ movie = moov(tracks),
+ result;
+ result = new Uint8Array(fileType.byteLength + movie.byteLength);
+ result.set(fileType);
+ result.set(movie, fileType.byteLength);
+ return result;
+ }
+ };
+ /**
+ * mux.js
+ *
+ * Copyright (c) Brightcove
+ * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
+ */
+ // composed of the nal units that make up that frame
+ // Also keep track of cummulative data about the frame from the nal units such
+ // as the frame duration, starting pts, etc.
+
+ var groupNalsIntoFrames = function (nalUnits) {
+ var i,
+ currentNal,
+ currentFrame = [],
+ frames = []; // TODO added for LHLS, make sure this is OK
+
+ frames.byteLength = 0;
+ frames.nalCount = 0;
+ frames.duration = 0;
+ currentFrame.byteLength = 0;
+ for (i = 0; i < nalUnits.length; i++) {
+ currentNal = nalUnits[i]; // Split on 'aud'-type nal units
+
+ if (currentNal.nalUnitType === 'access_unit_delimiter_rbsp') {
+ // Since the very first nal unit is expected to be an AUD
+ // only push to the frames array when currentFrame is not empty
+ if (currentFrame.length) {
+ currentFrame.duration = currentNal.dts - currentFrame.dts; // TODO added for LHLS, make sure this is OK
+
+ frames.byteLength += currentFrame.byteLength;
+ frames.nalCount += currentFrame.length;
+ frames.duration += currentFrame.duration;
+ frames.push(currentFrame);
+ }
+ currentFrame = [currentNal];
+ currentFrame.byteLength = currentNal.data.byteLength;
+ currentFrame.pts = currentNal.pts;
+ currentFrame.dts = currentNal.dts;
+ } else {
+ // Specifically flag key frames for ease of use later
+ if (currentNal.nalUnitType === 'slice_layer_without_partitioning_rbsp_idr') {
+ currentFrame.keyFrame = true;
+ }
+ currentFrame.duration = currentNal.dts - currentFrame.dts;
+ currentFrame.byteLength += currentNal.data.byteLength;
+ currentFrame.push(currentNal);
+ }
+ } // For the last frame, use the duration of the previous frame if we
+ // have nothing better to go on
+
+ if (frames.length && (!currentFrame.duration || currentFrame.duration <= 0)) {
+ currentFrame.duration = frames[frames.length - 1].duration;
+ } // Push the final frame
+ // TODO added for LHLS, make sure this is OK
+
+ frames.byteLength += currentFrame.byteLength;
+ frames.nalCount += currentFrame.length;
+ frames.duration += currentFrame.duration;
+ frames.push(currentFrame);
+ return frames;
+ }; // Convert an array of frames into an array of Gop with each Gop being composed
+ // of the frames that make up that Gop
+ // Also keep track of cummulative data about the Gop from the frames such as the
+ // Gop duration, starting pts, etc.
+
+ var groupFramesIntoGops = function (frames) {
+ var i,
+ currentFrame,
+ currentGop = [],
+ gops = []; // We must pre-set some of the values on the Gop since we
+ // keep running totals of these values
+
+ currentGop.byteLength = 0;
+ currentGop.nalCount = 0;
+ currentGop.duration = 0;
+ currentGop.pts = frames[0].pts;
+ currentGop.dts = frames[0].dts; // store some metadata about all the Gops
+
+ gops.byteLength = 0;
+ gops.nalCount = 0;
+ gops.duration = 0;
+ gops.pts = frames[0].pts;
+ gops.dts = frames[0].dts;
+ for (i = 0; i < frames.length; i++) {
+ currentFrame = frames[i];
+ if (currentFrame.keyFrame) {
+ // Since the very first frame is expected to be an keyframe
+ // only push to the gops array when currentGop is not empty
+ if (currentGop.length) {
+ gops.push(currentGop);
+ gops.byteLength += currentGop.byteLength;
+ gops.nalCount += currentGop.nalCount;
+ gops.duration += currentGop.duration;
+ }
+ currentGop = [currentFrame];
+ currentGop.nalCount = currentFrame.length;
+ currentGop.byteLength = currentFrame.byteLength;
+ currentGop.pts = currentFrame.pts;
+ currentGop.dts = currentFrame.dts;
+ currentGop.duration = currentFrame.duration;
+ } else {
+ currentGop.duration += currentFrame.duration;
+ currentGop.nalCount += currentFrame.length;
+ currentGop.byteLength += currentFrame.byteLength;
+ currentGop.push(currentFrame);
+ }
+ }
+ if (gops.length && currentGop.duration <= 0) {
+ currentGop.duration = gops[gops.length - 1].duration;
+ }
+ gops.byteLength += currentGop.byteLength;
+ gops.nalCount += currentGop.nalCount;
+ gops.duration += currentGop.duration; // push the final Gop
+
+ gops.push(currentGop);
+ return gops;
+ };
+ /*
+ * Search for the first keyframe in the GOPs and throw away all frames
+ * until that keyframe. Then extend the duration of the pulled keyframe
+ * and pull the PTS and DTS of the keyframe so that it covers the time
+ * range of the frames that were disposed.
+ *
+ * @param {Array} gops video GOPs
+ * @returns {Array} modified video GOPs
+ */
+
+ var extendFirstKeyFrame = function (gops) {
+ var currentGop;
+ if (!gops[0][0].keyFrame && gops.length > 1) {
+ // Remove the first GOP
+ currentGop = gops.shift();
+ gops.byteLength -= currentGop.byteLength;
+ gops.nalCount -= currentGop.nalCount; // Extend the first frame of what is now the
+ // first gop to cover the time period of the
+ // frames we just removed
+
+ gops[0][0].dts = currentGop.dts;
+ gops[0][0].pts = currentGop.pts;
+ gops[0][0].duration += currentGop.duration;
+ }
+ return gops;
+ };
+ /**
+ * Default sample object
+ * see ISO/IEC 14496-12:2012, section 8.6.4.3
+ */
+
+ var createDefaultSample = function () {
+ return {
+ size: 0,
+ flags: {
+ isLeading: 0,
+ dependsOn: 1,
+ isDependedOn: 0,
+ hasRedundancy: 0,
+ degradationPriority: 0,
+ isNonSyncSample: 1
+ }
+ };
+ };
+ /*
+ * Collates information from a video frame into an object for eventual
+ * entry into an MP4 sample table.
+ *
+ * @param {Object} frame the video frame
+ * @param {Number} dataOffset the byte offset to position the sample
+ * @return {Object} object containing sample table info for a frame
+ */
+
+ var sampleForFrame = function (frame, dataOffset) {
+ var sample = createDefaultSample();
+ sample.dataOffset = dataOffset;
+ sample.compositionTimeOffset = frame.pts - frame.dts;
+ sample.duration = frame.duration;
+ sample.size = 4 * frame.length; // Space for nal unit size
+
+ sample.size += frame.byteLength;
+ if (frame.keyFrame) {
+ sample.flags.dependsOn = 2;
+ sample.flags.isNonSyncSample = 0;
+ }
+ return sample;
+ }; // generate the track's sample table from an array of gops
+
+ var generateSampleTable$1 = function (gops, baseDataOffset) {
+ var h,
+ i,
+ sample,
+ currentGop,
+ currentFrame,
+ dataOffset = baseDataOffset || 0,
+ samples = [];
+ for (h = 0; h < gops.length; h++) {
+ currentGop = gops[h];
+ for (i = 0; i < currentGop.length; i++) {
+ currentFrame = currentGop[i];
+ sample = sampleForFrame(currentFrame, dataOffset);
+ dataOffset += sample.size;
+ samples.push(sample);
+ }
+ }
+ return samples;
+ }; // generate the track's raw mdat data from an array of gops
+
+ var concatenateNalData = function (gops) {
+ var h,
+ i,
+ j,
+ currentGop,
+ currentFrame,
+ currentNal,
+ dataOffset = 0,
+ nalsByteLength = gops.byteLength,
+ numberOfNals = gops.nalCount,
+ totalByteLength = nalsByteLength + 4 * numberOfNals,
+ data = new Uint8Array(totalByteLength),
+ view = new DataView(data.buffer); // For each Gop..
+
+ for (h = 0; h < gops.length; h++) {
+ currentGop = gops[h]; // For each Frame..
+
+ for (i = 0; i < currentGop.length; i++) {
+ currentFrame = currentGop[i]; // For each NAL..
+
+ for (j = 0; j < currentFrame.length; j++) {
+ currentNal = currentFrame[j];
+ view.setUint32(dataOffset, currentNal.data.byteLength);
+ dataOffset += 4;
+ data.set(currentNal.data, dataOffset);
+ dataOffset += currentNal.data.byteLength;
+ }
+ }
+ }
+ return data;
+ }; // generate the track's sample table from a frame
+
+ var generateSampleTableForFrame = function (frame, baseDataOffset) {
+ var sample,
+ dataOffset = baseDataOffset || 0,
+ samples = [];
+ sample = sampleForFrame(frame, dataOffset);
+ samples.push(sample);
+ return samples;
+ }; // generate the track's raw mdat data from a frame
+
+ var concatenateNalDataForFrame = function (frame) {
+ var i,
+ currentNal,
+ dataOffset = 0,
+ nalsByteLength = frame.byteLength,
+ numberOfNals = frame.length,
+ totalByteLength = nalsByteLength + 4 * numberOfNals,
+ data = new Uint8Array(totalByteLength),
+ view = new DataView(data.buffer); // For each NAL..
+
+ for (i = 0; i < frame.length; i++) {
+ currentNal = frame[i];
+ view.setUint32(dataOffset, currentNal.data.byteLength);
+ dataOffset += 4;
+ data.set(currentNal.data, dataOffset);
+ dataOffset += currentNal.data.byteLength;
+ }
+ return data;
+ };
+ var frameUtils$1 = {
+ groupNalsIntoFrames: groupNalsIntoFrames,
+ groupFramesIntoGops: groupFramesIntoGops,
+ extendFirstKeyFrame: extendFirstKeyFrame,
+ generateSampleTable: generateSampleTable$1,
+ concatenateNalData: concatenateNalData,
+ generateSampleTableForFrame: generateSampleTableForFrame,
+ concatenateNalDataForFrame: concatenateNalDataForFrame
+ };
+ /**
+ * mux.js
+ *
+ * Copyright (c) Brightcove
+ * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
+ */
+
+ var highPrefix = [33, 16, 5, 32, 164, 27];
+ var lowPrefix = [33, 65, 108, 84, 1, 2, 4, 8, 168, 2, 4, 8, 17, 191, 252];
+ var zeroFill = function (count) {
+ var a = [];
+ while (count--) {
+ a.push(0);
+ }
+ return a;
+ };
+ var makeTable = function (metaTable) {
+ return Object.keys(metaTable).reduce(function (obj, key) {
+ obj[key] = new Uint8Array(metaTable[key].reduce(function (arr, part) {
+ return arr.concat(part);
+ }, []));
+ return obj;
+ }, {});
+ };
+ var silence;
+ var silence_1 = function () {
+ if (!silence) {
+ // Frames-of-silence to use for filling in missing AAC frames
+ var coneOfSilence = {
+ 96000: [highPrefix, [227, 64], zeroFill(154), [56]],
+ 88200: [highPrefix, [231], zeroFill(170), [56]],
+ 64000: [highPrefix, [248, 192], zeroFill(240), [56]],
+ 48000: [highPrefix, [255, 192], zeroFill(268), [55, 148, 128], zeroFill(54), [112]],
+ 44100: [highPrefix, [255, 192], zeroFill(268), [55, 163, 128], zeroFill(84), [112]],
+ 32000: [highPrefix, [255, 192], zeroFill(268), [55, 234], zeroFill(226), [112]],
+ 24000: [highPrefix, [255, 192], zeroFill(268), [55, 255, 128], zeroFill(268), [111, 112], zeroFill(126), [224]],
+ 16000: [highPrefix, [255, 192], zeroFill(268), [55, 255, 128], zeroFill(268), [111, 255], zeroFill(269), [223, 108], zeroFill(195), [1, 192]],
+ 12000: [lowPrefix, zeroFill(268), [3, 127, 248], zeroFill(268), [6, 255, 240], zeroFill(268), [13, 255, 224], zeroFill(268), [27, 253, 128], zeroFill(259), [56]],
+ 11025: [lowPrefix, zeroFill(268), [3, 127, 248], zeroFill(268), [6, 255, 240], zeroFill(268), [13, 255, 224], zeroFill(268), [27, 255, 192], zeroFill(268), [55, 175, 128], zeroFill(108), [112]],
+ 8000: [lowPrefix, zeroFill(268), [3, 121, 16], zeroFill(47), [7]]
+ };
+ silence = makeTable(coneOfSilence);
+ }
+ return silence;
+ };
+ /**
+ * mux.js
+ *
+ * Copyright (c) Brightcove
+ * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
+ */
+
+ var ONE_SECOND_IN_TS$4 = 90000,
+ // 90kHz clock
+ secondsToVideoTs,
+ secondsToAudioTs,
+ videoTsToSeconds,
+ audioTsToSeconds,
+ audioTsToVideoTs,
+ videoTsToAudioTs,
+ metadataTsToSeconds;
+ secondsToVideoTs = function (seconds) {
+ return seconds * ONE_SECOND_IN_TS$4;
+ };
+ secondsToAudioTs = function (seconds, sampleRate) {
+ return seconds * sampleRate;
+ };
+ videoTsToSeconds = function (timestamp) {
+ return timestamp / ONE_SECOND_IN_TS$4;
+ };
+ audioTsToSeconds = function (timestamp, sampleRate) {
+ return timestamp / sampleRate;
+ };
+ audioTsToVideoTs = function (timestamp, sampleRate) {
+ return secondsToVideoTs(audioTsToSeconds(timestamp, sampleRate));
+ };
+ videoTsToAudioTs = function (timestamp, sampleRate) {
+ return secondsToAudioTs(videoTsToSeconds(timestamp), sampleRate);
+ };
+ /**
+ * Adjust ID3 tag or caption timing information by the timeline pts values
+ * (if keepOriginalTimestamps is false) and convert to seconds
+ */
+
+ metadataTsToSeconds = function (timestamp, timelineStartPts, keepOriginalTimestamps) {
+ return videoTsToSeconds(keepOriginalTimestamps ? timestamp : timestamp - timelineStartPts);
+ };
+ var clock$2 = {
+ ONE_SECOND_IN_TS: ONE_SECOND_IN_TS$4,
+ secondsToVideoTs: secondsToVideoTs,
+ secondsToAudioTs: secondsToAudioTs,
+ videoTsToSeconds: videoTsToSeconds,
+ audioTsToSeconds: audioTsToSeconds,
+ audioTsToVideoTs: audioTsToVideoTs,
+ videoTsToAudioTs: videoTsToAudioTs,
+ metadataTsToSeconds: metadataTsToSeconds
+ };
+ /**
+ * mux.js
+ *
+ * Copyright (c) Brightcove
+ * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
+ */
+
+ var coneOfSilence = silence_1;
+ var clock$1 = clock$2;
+ /**
+ * Sum the `byteLength` properties of the data in each AAC frame
+ */
+
+ var sumFrameByteLengths = function (array) {
+ var i,
+ currentObj,
+ sum = 0; // sum the byteLength's all each nal unit in the frame
+
+ for (i = 0; i < array.length; i++) {
+ currentObj = array[i];
+ sum += currentObj.data.byteLength;
+ }
+ return sum;
+ }; // Possibly pad (prefix) the audio track with silence if appending this track
+ // would lead to the introduction of a gap in the audio buffer
+
+ var prefixWithSilence = function (track, frames, audioAppendStartTs, videoBaseMediaDecodeTime) {
+ var baseMediaDecodeTimeTs,
+ frameDuration = 0,
+ audioGapDuration = 0,
+ audioFillFrameCount = 0,
+ audioFillDuration = 0,
+ silentFrame,
+ i,
+ firstFrame;
+ if (!frames.length) {
+ return;
+ }
+ baseMediaDecodeTimeTs = clock$1.audioTsToVideoTs(track.baseMediaDecodeTime, track.samplerate); // determine frame clock duration based on sample rate, round up to avoid overfills
+
+ frameDuration = Math.ceil(clock$1.ONE_SECOND_IN_TS / (track.samplerate / 1024));
+ if (audioAppendStartTs && videoBaseMediaDecodeTime) {
+ // insert the shortest possible amount (audio gap or audio to video gap)
+ audioGapDuration = baseMediaDecodeTimeTs - Math.max(audioAppendStartTs, videoBaseMediaDecodeTime); // number of full frames in the audio gap
+
+ audioFillFrameCount = Math.floor(audioGapDuration / frameDuration);
+ audioFillDuration = audioFillFrameCount * frameDuration;
+ } // don't attempt to fill gaps smaller than a single frame or larger
+ // than a half second
+
+ if (audioFillFrameCount < 1 || audioFillDuration > clock$1.ONE_SECOND_IN_TS / 2) {
+ return;
+ }
+ silentFrame = coneOfSilence()[track.samplerate];
+ if (!silentFrame) {
+ // we don't have a silent frame pregenerated for the sample rate, so use a frame
+ // from the content instead
+ silentFrame = frames[0].data;
+ }
+ for (i = 0; i < audioFillFrameCount; i++) {
+ firstFrame = frames[0];
+ frames.splice(0, 0, {
+ data: silentFrame,
+ dts: firstFrame.dts - frameDuration,
+ pts: firstFrame.pts - frameDuration
+ });
+ }
+ track.baseMediaDecodeTime -= Math.floor(clock$1.videoTsToAudioTs(audioFillDuration, track.samplerate));
+ return audioFillDuration;
+ }; // If the audio segment extends before the earliest allowed dts
+ // value, remove AAC frames until starts at or after the earliest
+ // allowed DTS so that we don't end up with a negative baseMedia-
+ // DecodeTime for the audio track
+
+ var trimAdtsFramesByEarliestDts = function (adtsFrames, track, earliestAllowedDts) {
+ if (track.minSegmentDts >= earliestAllowedDts) {
+ return adtsFrames;
+ } // We will need to recalculate the earliest segment Dts
+
+ track.minSegmentDts = Infinity;
+ return adtsFrames.filter(function (currentFrame) {
+ // If this is an allowed frame, keep it and record it's Dts
+ if (currentFrame.dts >= earliestAllowedDts) {
+ track.minSegmentDts = Math.min(track.minSegmentDts, currentFrame.dts);
+ track.minSegmentPts = track.minSegmentDts;
+ return true;
+ } // Otherwise, discard it
+
+ return false;
+ });
+ }; // generate the track's raw mdat data from an array of frames
+
+ var generateSampleTable = function (frames) {
+ var i,
+ currentFrame,
+ samples = [];
+ for (i = 0; i < frames.length; i++) {
+ currentFrame = frames[i];
+ samples.push({
+ size: currentFrame.data.byteLength,
+ duration: 1024 // For AAC audio, all samples contain 1024 samples
+ });
+ }
+
+ return samples;
+ }; // generate the track's sample table from an array of frames
+
+ var concatenateFrameData = function (frames) {
+ var i,
+ currentFrame,
+ dataOffset = 0,
+ data = new Uint8Array(sumFrameByteLengths(frames));
+ for (i = 0; i < frames.length; i++) {
+ currentFrame = frames[i];
+ data.set(currentFrame.data, dataOffset);
+ dataOffset += currentFrame.data.byteLength;
+ }
+ return data;
+ };
+ var audioFrameUtils$1 = {
+ prefixWithSilence: prefixWithSilence,
+ trimAdtsFramesByEarliestDts: trimAdtsFramesByEarliestDts,
+ generateSampleTable: generateSampleTable,
+ concatenateFrameData: concatenateFrameData
+ };
+ /**
+ * mux.js
+ *
+ * Copyright (c) Brightcove
+ * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
+ */
+
+ var ONE_SECOND_IN_TS$3 = clock$2.ONE_SECOND_IN_TS;
+ /**
+ * Store information about the start and end of the track and the
+ * duration for each frame/sample we process in order to calculate
+ * the baseMediaDecodeTime
+ */
+
+ var collectDtsInfo = function (track, data) {
+ if (typeof data.pts === 'number') {
+ if (track.timelineStartInfo.pts === undefined) {
+ track.timelineStartInfo.pts = data.pts;
+ }
+ if (track.minSegmentPts === undefined) {
+ track.minSegmentPts = data.pts;
+ } else {
+ track.minSegmentPts = Math.min(track.minSegmentPts, data.pts);
+ }
+ if (track.maxSegmentPts === undefined) {
+ track.maxSegmentPts = data.pts;
+ } else {
+ track.maxSegmentPts = Math.max(track.maxSegmentPts, data.pts);
+ }
+ }
+ if (typeof data.dts === 'number') {
+ if (track.timelineStartInfo.dts === undefined) {
+ track.timelineStartInfo.dts = data.dts;
+ }
+ if (track.minSegmentDts === undefined) {
+ track.minSegmentDts = data.dts;
+ } else {
+ track.minSegmentDts = Math.min(track.minSegmentDts, data.dts);
+ }
+ if (track.maxSegmentDts === undefined) {
+ track.maxSegmentDts = data.dts;
+ } else {
+ track.maxSegmentDts = Math.max(track.maxSegmentDts, data.dts);
+ }
+ }
+ };
+ /**
+ * Clear values used to calculate the baseMediaDecodeTime between
+ * tracks
+ */
+
+ var clearDtsInfo = function (track) {
+ delete track.minSegmentDts;
+ delete track.maxSegmentDts;
+ delete track.minSegmentPts;
+ delete track.maxSegmentPts;
+ };
+ /**
+ * Calculate the track's baseMediaDecodeTime based on the earliest
+ * DTS the transmuxer has ever seen and the minimum DTS for the
+ * current track
+ * @param track {object} track metadata configuration
+ * @param keepOriginalTimestamps {boolean} If true, keep the timestamps
+ * in the source; false to adjust the first segment to start at 0.
+ */
+
+ var calculateTrackBaseMediaDecodeTime = function (track, keepOriginalTimestamps) {
+ var baseMediaDecodeTime,
+ scale,
+ minSegmentDts = track.minSegmentDts; // Optionally adjust the time so the first segment starts at zero.
+
+ if (!keepOriginalTimestamps) {
+ minSegmentDts -= track.timelineStartInfo.dts;
+ } // track.timelineStartInfo.baseMediaDecodeTime is the location, in time, where
+ // we want the start of the first segment to be placed
+
+ baseMediaDecodeTime = track.timelineStartInfo.baseMediaDecodeTime; // Add to that the distance this segment is from the very first
+
+ baseMediaDecodeTime += minSegmentDts; // baseMediaDecodeTime must not become negative
+
+ baseMediaDecodeTime = Math.max(0, baseMediaDecodeTime);
+ if (track.type === 'audio') {
+ // Audio has a different clock equal to the sampling_rate so we need to
+ // scale the PTS values into the clock rate of the track
+ scale = track.samplerate / ONE_SECOND_IN_TS$3;
+ baseMediaDecodeTime *= scale;
+ baseMediaDecodeTime = Math.floor(baseMediaDecodeTime);
+ }
+ return baseMediaDecodeTime;
+ };
+ var trackDecodeInfo$1 = {
+ clearDtsInfo: clearDtsInfo,
+ calculateTrackBaseMediaDecodeTime: calculateTrackBaseMediaDecodeTime,
+ collectDtsInfo: collectDtsInfo
+ };
+ /**
+ * mux.js
+ *
+ * Copyright (c) Brightcove
+ * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
+ *
+ * Reads in-band caption information from a video elementary
+ * stream. Captions must follow the CEA-708 standard for injection
+ * into an MPEG-2 transport streams.
+ * @see https://en.wikipedia.org/wiki/CEA-708
+ * @see https://www.gpo.gov/fdsys/pkg/CFR-2007-title47-vol1/pdf/CFR-2007-title47-vol1-sec15-119.pdf
+ */
+ // payload type field to indicate how they are to be
+ // interpreted. CEAS-708 caption content is always transmitted with
+ // payload type 0x04.
+
+ var USER_DATA_REGISTERED_ITU_T_T35 = 4,
+ RBSP_TRAILING_BITS = 128;
+ /**
+ * Parse a supplemental enhancement information (SEI) NAL unit.
+ * Stops parsing once a message of type ITU T T35 has been found.
+ *
+ * @param bytes {Uint8Array} the bytes of a SEI NAL unit
+ * @return {object} the parsed SEI payload
+ * @see Rec. ITU-T H.264, 7.3.2.3.1
+ */
+
+ var parseSei = function (bytes) {
+ var i = 0,
+ result = {
+ payloadType: -1,
+ payloadSize: 0
+ },
+ payloadType = 0,
+ payloadSize = 0; // go through the sei_rbsp parsing each each individual sei_message
+
+ while (i < bytes.byteLength) {
+ // stop once we have hit the end of the sei_rbsp
+ if (bytes[i] === RBSP_TRAILING_BITS) {
+ break;
+ } // Parse payload type
+
+ while (bytes[i] === 0xFF) {
+ payloadType += 255;
+ i++;
+ }
+ payloadType += bytes[i++]; // Parse payload size
+
+ while (bytes[i] === 0xFF) {
+ payloadSize += 255;
+ i++;
+ }
+ payloadSize += bytes[i++]; // this sei_message is a 608/708 caption so save it and break
+ // there can only ever be one caption message in a frame's sei
+
+ if (!result.payload && payloadType === USER_DATA_REGISTERED_ITU_T_T35) {
+ var userIdentifier = String.fromCharCode(bytes[i + 3], bytes[i + 4], bytes[i + 5], bytes[i + 6]);
+ if (userIdentifier === 'GA94') {
+ result.payloadType = payloadType;
+ result.payloadSize = payloadSize;
+ result.payload = bytes.subarray(i, i + payloadSize);
+ break;
+ } else {
+ result.payload = void 0;
+ }
+ } // skip the payload and parse the next message
+
+ i += payloadSize;
+ payloadType = 0;
+ payloadSize = 0;
+ }
+ return result;
+ }; // see ANSI/SCTE 128-1 (2013), section 8.1
+
+ var parseUserData = function (sei) {
+ // itu_t_t35_contry_code must be 181 (United States) for
+ // captions
+ if (sei.payload[0] !== 181) {
+ return null;
+ } // itu_t_t35_provider_code should be 49 (ATSC) for captions
+
+ if ((sei.payload[1] << 8 | sei.payload[2]) !== 49) {
+ return null;
+ } // the user_identifier should be "GA94" to indicate ATSC1 data
+
+ if (String.fromCharCode(sei.payload[3], sei.payload[4], sei.payload[5], sei.payload[6]) !== 'GA94') {
+ return null;
+ } // finally, user_data_type_code should be 0x03 for caption data
+
+ if (sei.payload[7] !== 0x03) {
+ return null;
+ } // return the user_data_type_structure and strip the trailing
+ // marker bits
+
+ return sei.payload.subarray(8, sei.payload.length - 1);
+ }; // see CEA-708-D, section 4.4
+
+ var parseCaptionPackets = function (pts, userData) {
+ var results = [],
+ i,
+ count,
+ offset,
+ data; // if this is just filler, return immediately
+
+ if (!(userData[0] & 0x40)) {
+ return results;
+ } // parse out the cc_data_1 and cc_data_2 fields
+
+ count = userData[0] & 0x1f;
+ for (i = 0; i < count; i++) {
+ offset = i * 3;
+ data = {
+ type: userData[offset + 2] & 0x03,
+ pts: pts
+ }; // capture cc data when cc_valid is 1
+
+ if (userData[offset + 2] & 0x04) {
+ data.ccData = userData[offset + 3] << 8 | userData[offset + 4];
+ results.push(data);
+ }
+ }
+ return results;
+ };
+ var discardEmulationPreventionBytes$1 = function (data) {
+ var length = data.byteLength,
+ emulationPreventionBytesPositions = [],
+ i = 1,
+ newLength,
+ newData; // Find all `Emulation Prevention Bytes`
+
+ while (i < length - 2) {
+ if (data[i] === 0 && data[i + 1] === 0 && data[i + 2] === 0x03) {
+ emulationPreventionBytesPositions.push(i + 2);
+ i += 2;
+ } else {
+ i++;
+ }
+ } // If no Emulation Prevention Bytes were found just return the original
+ // array
+
+ if (emulationPreventionBytesPositions.length === 0) {
+ return data;
+ } // Create a new array to hold the NAL unit data
+
+ newLength = length - emulationPreventionBytesPositions.length;
+ newData = new Uint8Array(newLength);
+ var sourceIndex = 0;
+ for (i = 0; i < newLength; sourceIndex++, i++) {
+ if (sourceIndex === emulationPreventionBytesPositions[0]) {
+ // Skip this byte
+ sourceIndex++; // Remove this position index
+
+ emulationPreventionBytesPositions.shift();
+ }
+ newData[i] = data[sourceIndex];
+ }
+ return newData;
+ }; // exports
+
+ var captionPacketParser = {
+ parseSei: parseSei,
+ parseUserData: parseUserData,
+ parseCaptionPackets: parseCaptionPackets,
+ discardEmulationPreventionBytes: discardEmulationPreventionBytes$1,
+ USER_DATA_REGISTERED_ITU_T_T35: USER_DATA_REGISTERED_ITU_T_T35
+ };
+ /**
+ * mux.js
+ *
+ * Copyright (c) Brightcove
+ * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
+ *
+ * Reads in-band caption information from a video elementary
+ * stream. Captions must follow the CEA-708 standard for injection
+ * into an MPEG-2 transport streams.
+ * @see https://en.wikipedia.org/wiki/CEA-708
+ * @see https://www.gpo.gov/fdsys/pkg/CFR-2007-title47-vol1/pdf/CFR-2007-title47-vol1-sec15-119.pdf
+ */
+ // Link To Transport
+ // -----------------
+
+ var Stream$7 = stream;
+ var cea708Parser = captionPacketParser;
+ var CaptionStream$2 = function (options) {
+ options = options || {};
+ CaptionStream$2.prototype.init.call(this); // parse708captions flag, default to true
+
+ this.parse708captions_ = typeof options.parse708captions === 'boolean' ? options.parse708captions : true;
+ this.captionPackets_ = [];
+ this.ccStreams_ = [new Cea608Stream(0, 0),
+ // eslint-disable-line no-use-before-define
+ new Cea608Stream(0, 1),
+ // eslint-disable-line no-use-before-define
+ new Cea608Stream(1, 0),
+ // eslint-disable-line no-use-before-define
+ new Cea608Stream(1, 1) // eslint-disable-line no-use-before-define
+ ];
+
+ if (this.parse708captions_) {
+ this.cc708Stream_ = new Cea708Stream({
+ captionServices: options.captionServices
+ }); // eslint-disable-line no-use-before-define
+ }
+
+ this.reset(); // forward data and done events from CCs to this CaptionStream
+
+ this.ccStreams_.forEach(function (cc) {
+ cc.on('data', this.trigger.bind(this, 'data'));
+ cc.on('partialdone', this.trigger.bind(this, 'partialdone'));
+ cc.on('done', this.trigger.bind(this, 'done'));
+ }, this);
+ if (this.parse708captions_) {
+ this.cc708Stream_.on('data', this.trigger.bind(this, 'data'));
+ this.cc708Stream_.on('partialdone', this.trigger.bind(this, 'partialdone'));
+ this.cc708Stream_.on('done', this.trigger.bind(this, 'done'));
+ }
+ };
+ CaptionStream$2.prototype = new Stream$7();
+ CaptionStream$2.prototype.push = function (event) {
+ var sei, userData, newCaptionPackets; // only examine SEI NALs
+
+ if (event.nalUnitType !== 'sei_rbsp') {
+ return;
+ } // parse the sei
+
+ sei = cea708Parser.parseSei(event.escapedRBSP); // no payload data, skip
+
+ if (!sei.payload) {
+ return;
+ } // ignore everything but user_data_registered_itu_t_t35
+
+ if (sei.payloadType !== cea708Parser.USER_DATA_REGISTERED_ITU_T_T35) {
+ return;
+ } // parse out the user data payload
+
+ userData = cea708Parser.parseUserData(sei); // ignore unrecognized userData
+
+ if (!userData) {
+ return;
+ } // Sometimes, the same segment # will be downloaded twice. To stop the
+ // caption data from being processed twice, we track the latest dts we've
+ // received and ignore everything with a dts before that. However, since
+ // data for a specific dts can be split across packets on either side of
+ // a segment boundary, we need to make sure we *don't* ignore the packets
+ // from the *next* segment that have dts === this.latestDts_. By constantly
+ // tracking the number of packets received with dts === this.latestDts_, we
+ // know how many should be ignored once we start receiving duplicates.
+
+ if (event.dts < this.latestDts_) {
+ // We've started getting older data, so set the flag.
+ this.ignoreNextEqualDts_ = true;
+ return;
+ } else if (event.dts === this.latestDts_ && this.ignoreNextEqualDts_) {
+ this.numSameDts_--;
+ if (!this.numSameDts_) {
+ // We've received the last duplicate packet, time to start processing again
+ this.ignoreNextEqualDts_ = false;
+ }
+ return;
+ } // parse out CC data packets and save them for later
+
+ newCaptionPackets = cea708Parser.parseCaptionPackets(event.pts, userData);
+ this.captionPackets_ = this.captionPackets_.concat(newCaptionPackets);
+ if (this.latestDts_ !== event.dts) {
+ this.numSameDts_ = 0;
+ }
+ this.numSameDts_++;
+ this.latestDts_ = event.dts;
+ };
+ CaptionStream$2.prototype.flushCCStreams = function (flushType) {
+ this.ccStreams_.forEach(function (cc) {
+ return flushType === 'flush' ? cc.flush() : cc.partialFlush();
+ }, this);
+ };
+ CaptionStream$2.prototype.flushStream = function (flushType) {
+ // make sure we actually parsed captions before proceeding
+ if (!this.captionPackets_.length) {
+ this.flushCCStreams(flushType);
+ return;
+ } // In Chrome, the Array#sort function is not stable so add a
+ // presortIndex that we can use to ensure we get a stable-sort
+
+ this.captionPackets_.forEach(function (elem, idx) {
+ elem.presortIndex = idx;
+ }); // sort caption byte-pairs based on their PTS values
+
+ this.captionPackets_.sort(function (a, b) {
+ if (a.pts === b.pts) {
+ return a.presortIndex - b.presortIndex;
+ }
+ return a.pts - b.pts;
+ });
+ this.captionPackets_.forEach(function (packet) {
+ if (packet.type < 2) {
+ // Dispatch packet to the right Cea608Stream
+ this.dispatchCea608Packet(packet);
+ } else {
+ // Dispatch packet to the Cea708Stream
+ this.dispatchCea708Packet(packet);
+ }
+ }, this);
+ this.captionPackets_.length = 0;
+ this.flushCCStreams(flushType);
+ };
+ CaptionStream$2.prototype.flush = function () {
+ return this.flushStream('flush');
+ }; // Only called if handling partial data
+
+ CaptionStream$2.prototype.partialFlush = function () {
+ return this.flushStream('partialFlush');
+ };
+ CaptionStream$2.prototype.reset = function () {
+ this.latestDts_ = null;
+ this.ignoreNextEqualDts_ = false;
+ this.numSameDts_ = 0;
+ this.activeCea608Channel_ = [null, null];
+ this.ccStreams_.forEach(function (ccStream) {
+ ccStream.reset();
+ });
+ }; // From the CEA-608 spec:
+
+ /*
+ * When XDS sub-packets are interleaved with other services, the end of each sub-packet shall be followed
+ * by a control pair to change to a different service. When any of the control codes from 0x10 to 0x1F is
+ * used to begin a control code pair, it indicates the return to captioning or Text data. The control code pair
+ * and subsequent data should then be processed according to the FCC rules. It may be necessary for the
+ * line 21 data encoder to automatically insert a control code pair (i.e. RCL, RU2, RU3, RU4, RDC, or RTD)
+ * to switch to captioning or Text.
+ */
+ // With that in mind, we ignore any data between an XDS control code and a
+ // subsequent closed-captioning control code.
+
+ CaptionStream$2.prototype.dispatchCea608Packet = function (packet) {
+ // NOTE: packet.type is the CEA608 field
+ if (this.setsTextOrXDSActive(packet)) {
+ this.activeCea608Channel_[packet.type] = null;
+ } else if (this.setsChannel1Active(packet)) {
+ this.activeCea608Channel_[packet.type] = 0;
+ } else if (this.setsChannel2Active(packet)) {
+ this.activeCea608Channel_[packet.type] = 1;
+ }
+ if (this.activeCea608Channel_[packet.type] === null) {
+ // If we haven't received anything to set the active channel, or the
+ // packets are Text/XDS data, discard the data; we don't want jumbled
+ // captions
+ return;
+ }
+ this.ccStreams_[(packet.type << 1) + this.activeCea608Channel_[packet.type]].push(packet);
+ };
+ CaptionStream$2.prototype.setsChannel1Active = function (packet) {
+ return (packet.ccData & 0x7800) === 0x1000;
+ };
+ CaptionStream$2.prototype.setsChannel2Active = function (packet) {
+ return (packet.ccData & 0x7800) === 0x1800;
+ };
+ CaptionStream$2.prototype.setsTextOrXDSActive = function (packet) {
+ return (packet.ccData & 0x7100) === 0x0100 || (packet.ccData & 0x78fe) === 0x102a || (packet.ccData & 0x78fe) === 0x182a;
+ };
+ CaptionStream$2.prototype.dispatchCea708Packet = function (packet) {
+ if (this.parse708captions_) {
+ this.cc708Stream_.push(packet);
+ }
+ }; // ----------------------
+ // Session to Application
+ // ----------------------
+ // This hash maps special and extended character codes to their
+ // proper Unicode equivalent. The first one-byte key is just a
+ // non-standard character code. The two-byte keys that follow are
+ // the extended CEA708 character codes, along with the preceding
+ // 0x10 extended character byte to distinguish these codes from
+ // non-extended character codes. Every CEA708 character code that
+ // is not in this object maps directly to a standard unicode
+ // character code.
+ // The transparent space and non-breaking transparent space are
+ // technically not fully supported since there is no code to
+ // make them transparent, so they have normal non-transparent
+ // stand-ins.
+ // The special closed caption (CC) character isn't a standard
+ // unicode character, so a fairly similar unicode character was
+ // chosen in it's place.
+
+ var CHARACTER_TRANSLATION_708 = {
+ 0x7f: 0x266a,
+ // ♪
+ 0x1020: 0x20,
+ // Transparent Space
+ 0x1021: 0xa0,
+ // Nob-breaking Transparent Space
+ 0x1025: 0x2026,
+ // …
+ 0x102a: 0x0160,
+ // Š
+ 0x102c: 0x0152,
+ // Œ
+ 0x1030: 0x2588,
+ // █
+ 0x1031: 0x2018,
+ // ‘
+ 0x1032: 0x2019,
+ // ’
+ 0x1033: 0x201c,
+ // “
+ 0x1034: 0x201d,
+ // ”
+ 0x1035: 0x2022,
+ // •
+ 0x1039: 0x2122,
+ // ™
+ 0x103a: 0x0161,
+ // š
+ 0x103c: 0x0153,
+ // œ
+ 0x103d: 0x2120,
+ // ℠
+ 0x103f: 0x0178,
+ // Ÿ
+ 0x1076: 0x215b,
+ // ⅛
+ 0x1077: 0x215c,
+ // ⅜
+ 0x1078: 0x215d,
+ // ⅝
+ 0x1079: 0x215e,
+ // ⅞
+ 0x107a: 0x23d0,
+ // ⏐
+ 0x107b: 0x23a4,
+ // ⎤
+ 0x107c: 0x23a3,
+ // ⎣
+ 0x107d: 0x23af,
+ // ⎯
+ 0x107e: 0x23a6,
+ // ⎦
+ 0x107f: 0x23a1,
+ // ⎡
+ 0x10a0: 0x3138 // ㄸ (CC char)
+ };
+
+ var get708CharFromCode = function (code) {
+ var newCode = CHARACTER_TRANSLATION_708[code] || code;
+ if (code & 0x1000 && code === newCode) {
+ // Invalid extended code
+ return '';
+ }
+ return String.fromCharCode(newCode);
+ };
+ var within708TextBlock = function (b) {
+ return 0x20 <= b && b <= 0x7f || 0xa0 <= b && b <= 0xff;
+ };
+ var Cea708Window = function (windowNum) {
+ this.windowNum = windowNum;
+ this.reset();
+ };
+ Cea708Window.prototype.reset = function () {
+ this.clearText();
+ this.pendingNewLine = false;
+ this.winAttr = {};
+ this.penAttr = {};
+ this.penLoc = {};
+ this.penColor = {}; // These default values are arbitrary,
+ // defineWindow will usually override them
+
+ this.visible = 0;
+ this.rowLock = 0;
+ this.columnLock = 0;
+ this.priority = 0;
+ this.relativePositioning = 0;
+ this.anchorVertical = 0;
+ this.anchorHorizontal = 0;
+ this.anchorPoint = 0;
+ this.rowCount = 1;
+ this.virtualRowCount = this.rowCount + 1;
+ this.columnCount = 41;
+ this.windowStyle = 0;
+ this.penStyle = 0;
+ };
+ Cea708Window.prototype.getText = function () {
+ return this.rows.join('\n');
+ };
+ Cea708Window.prototype.clearText = function () {
+ this.rows = [''];
+ this.rowIdx = 0;
+ };
+ Cea708Window.prototype.newLine = function (pts) {
+ if (this.rows.length >= this.virtualRowCount && typeof this.beforeRowOverflow === 'function') {
+ this.beforeRowOverflow(pts);
+ }
+ if (this.rows.length > 0) {
+ this.rows.push('');
+ this.rowIdx++;
+ } // Show all virtual rows since there's no visible scrolling
+
+ while (this.rows.length > this.virtualRowCount) {
+ this.rows.shift();
+ this.rowIdx--;
+ }
+ };
+ Cea708Window.prototype.isEmpty = function () {
+ if (this.rows.length === 0) {
+ return true;
+ } else if (this.rows.length === 1) {
+ return this.rows[0] === '';
+ }
+ return false;
+ };
+ Cea708Window.prototype.addText = function (text) {
+ this.rows[this.rowIdx] += text;
+ };
+ Cea708Window.prototype.backspace = function () {
+ if (!this.isEmpty()) {
+ var row = this.rows[this.rowIdx];
+ this.rows[this.rowIdx] = row.substr(0, row.length - 1);
+ }
+ };
+ var Cea708Service = function (serviceNum, encoding, stream) {
+ this.serviceNum = serviceNum;
+ this.text = '';
+ this.currentWindow = new Cea708Window(-1);
+ this.windows = [];
+ this.stream = stream; // Try to setup a TextDecoder if an `encoding` value was provided
+
+ if (typeof encoding === 'string') {
+ this.createTextDecoder(encoding);
+ }
+ };
+ /**
+ * Initialize service windows
+ * Must be run before service use
+ *
+ * @param {Integer} pts PTS value
+ * @param {Function} beforeRowOverflow Function to execute before row overflow of a window
+ */
+
+ Cea708Service.prototype.init = function (pts, beforeRowOverflow) {
+ this.startPts = pts;
+ for (var win = 0; win < 8; win++) {
+ this.windows[win] = new Cea708Window(win);
+ if (typeof beforeRowOverflow === 'function') {
+ this.windows[win].beforeRowOverflow = beforeRowOverflow;
+ }
+ }
+ };
+ /**
+ * Set current window of service to be affected by commands
+ *
+ * @param {Integer} windowNum Window number
+ */
+
+ Cea708Service.prototype.setCurrentWindow = function (windowNum) {
+ this.currentWindow = this.windows[windowNum];
+ };
+ /**
+ * Try to create a TextDecoder if it is natively supported
+ */
+
+ Cea708Service.prototype.createTextDecoder = function (encoding) {
+ if (typeof TextDecoder === 'undefined') {
+ this.stream.trigger('log', {
+ level: 'warn',
+ message: 'The `encoding` option is unsupported without TextDecoder support'
+ });
+ } else {
+ try {
+ this.textDecoder_ = new TextDecoder(encoding);
+ } catch (error) {
+ this.stream.trigger('log', {
+ level: 'warn',
+ message: 'TextDecoder could not be created with ' + encoding + ' encoding. ' + error
+ });
+ }
+ }
+ };
+ var Cea708Stream = function (options) {
+ options = options || {};
+ Cea708Stream.prototype.init.call(this);
+ var self = this;
+ var captionServices = options.captionServices || {};
+ var captionServiceEncodings = {};
+ var serviceProps; // Get service encodings from captionServices option block
+
+ Object.keys(captionServices).forEach(serviceName => {
+ serviceProps = captionServices[serviceName];
+ if (/^SERVICE/.test(serviceName)) {
+ captionServiceEncodings[serviceName] = serviceProps.encoding;
+ }
+ });
+ this.serviceEncodings = captionServiceEncodings;
+ this.current708Packet = null;
+ this.services = {};
+ this.push = function (packet) {
+ if (packet.type === 3) {
+ // 708 packet start
+ self.new708Packet();
+ self.add708Bytes(packet);
+ } else {
+ if (self.current708Packet === null) {
+ // This should only happen at the start of a file if there's no packet start.
+ self.new708Packet();
+ }
+ self.add708Bytes(packet);
+ }
+ };
+ };
+ Cea708Stream.prototype = new Stream$7();
+ /**
+ * Push current 708 packet, create new 708 packet.
+ */
+
+ Cea708Stream.prototype.new708Packet = function () {
+ if (this.current708Packet !== null) {
+ this.push708Packet();
+ }
+ this.current708Packet = {
+ data: [],
+ ptsVals: []
+ };
+ };
+ /**
+ * Add pts and both bytes from packet into current 708 packet.
+ */
+
+ Cea708Stream.prototype.add708Bytes = function (packet) {
+ var data = packet.ccData;
+ var byte0 = data >>> 8;
+ var byte1 = data & 0xff; // I would just keep a list of packets instead of bytes, but it isn't clear in the spec
+ // that service blocks will always line up with byte pairs.
+
+ this.current708Packet.ptsVals.push(packet.pts);
+ this.current708Packet.data.push(byte0);
+ this.current708Packet.data.push(byte1);
+ };
+ /**
+ * Parse completed 708 packet into service blocks and push each service block.
+ */
+
+ Cea708Stream.prototype.push708Packet = function () {
+ var packet708 = this.current708Packet;
+ var packetData = packet708.data;
+ var serviceNum = null;
+ var blockSize = null;
+ var i = 0;
+ var b = packetData[i++];
+ packet708.seq = b >> 6;
+ packet708.sizeCode = b & 0x3f; // 0b00111111;
+
+ for (; i < packetData.length; i++) {
+ b = packetData[i++];
+ serviceNum = b >> 5;
+ blockSize = b & 0x1f; // 0b00011111
+
+ if (serviceNum === 7 && blockSize > 0) {
+ // Extended service num
+ b = packetData[i++];
+ serviceNum = b;
+ }
+ this.pushServiceBlock(serviceNum, i, blockSize);
+ if (blockSize > 0) {
+ i += blockSize - 1;
+ }
+ }
+ };
+ /**
+ * Parse service block, execute commands, read text.
+ *
+ * Note: While many of these commands serve important purposes,
+ * many others just parse out the parameters or attributes, but
+ * nothing is done with them because this is not a full and complete
+ * implementation of the entire 708 spec.
+ *
+ * @param {Integer} serviceNum Service number
+ * @param {Integer} start Start index of the 708 packet data
+ * @param {Integer} size Block size
+ */
+
+ Cea708Stream.prototype.pushServiceBlock = function (serviceNum, start, size) {
+ var b;
+ var i = start;
+ var packetData = this.current708Packet.data;
+ var service = this.services[serviceNum];
+ if (!service) {
+ service = this.initService(serviceNum, i);
+ }
+ for (; i < start + size && i < packetData.length; i++) {
+ b = packetData[i];
+ if (within708TextBlock(b)) {
+ i = this.handleText(i, service);
+ } else if (b === 0x18) {
+ i = this.multiByteCharacter(i, service);
+ } else if (b === 0x10) {
+ i = this.extendedCommands(i, service);
+ } else if (0x80 <= b && b <= 0x87) {
+ i = this.setCurrentWindow(i, service);
+ } else if (0x98 <= b && b <= 0x9f) {
+ i = this.defineWindow(i, service);
+ } else if (b === 0x88) {
+ i = this.clearWindows(i, service);
+ } else if (b === 0x8c) {
+ i = this.deleteWindows(i, service);
+ } else if (b === 0x89) {
+ i = this.displayWindows(i, service);
+ } else if (b === 0x8a) {
+ i = this.hideWindows(i, service);
+ } else if (b === 0x8b) {
+ i = this.toggleWindows(i, service);
+ } else if (b === 0x97) {
+ i = this.setWindowAttributes(i, service);
+ } else if (b === 0x90) {
+ i = this.setPenAttributes(i, service);
+ } else if (b === 0x91) {
+ i = this.setPenColor(i, service);
+ } else if (b === 0x92) {
+ i = this.setPenLocation(i, service);
+ } else if (b === 0x8f) {
+ service = this.reset(i, service);
+ } else if (b === 0x08) {
+ // BS: Backspace
+ service.currentWindow.backspace();
+ } else if (b === 0x0c) {
+ // FF: Form feed
+ service.currentWindow.clearText();
+ } else if (b === 0x0d) {
+ // CR: Carriage return
+ service.currentWindow.pendingNewLine = true;
+ } else if (b === 0x0e) {
+ // HCR: Horizontal carriage return
+ service.currentWindow.clearText();
+ } else if (b === 0x8d) {
+ // DLY: Delay, nothing to do
+ i++;
+ } else ;
+ }
+ };
+ /**
+ * Execute an extended command
+ *
+ * @param {Integer} i Current index in the 708 packet
+ * @param {Service} service The service object to be affected
+ * @return {Integer} New index after parsing
+ */
+
+ Cea708Stream.prototype.extendedCommands = function (i, service) {
+ var packetData = this.current708Packet.data;
+ var b = packetData[++i];
+ if (within708TextBlock(b)) {
+ i = this.handleText(i, service, {
+ isExtended: true
+ });
+ }
+ return i;
+ };
+ /**
+ * Get PTS value of a given byte index
+ *
+ * @param {Integer} byteIndex Index of the byte
+ * @return {Integer} PTS
+ */
+
+ Cea708Stream.prototype.getPts = function (byteIndex) {
+ // There's 1 pts value per 2 bytes
+ return this.current708Packet.ptsVals[Math.floor(byteIndex / 2)];
+ };
+ /**
+ * Initializes a service
+ *
+ * @param {Integer} serviceNum Service number
+ * @return {Service} Initialized service object
+ */
+
+ Cea708Stream.prototype.initService = function (serviceNum, i) {
+ var serviceName = 'SERVICE' + serviceNum;
+ var self = this;
+ var serviceName;
+ var encoding;
+ if (serviceName in this.serviceEncodings) {
+ encoding = this.serviceEncodings[serviceName];
+ }
+ this.services[serviceNum] = new Cea708Service(serviceNum, encoding, self);
+ this.services[serviceNum].init(this.getPts(i), function (pts) {
+ self.flushDisplayed(pts, self.services[serviceNum]);
+ });
+ return this.services[serviceNum];
+ };
+ /**
+ * Execute text writing to current window
+ *
+ * @param {Integer} i Current index in the 708 packet
+ * @param {Service} service The service object to be affected
+ * @return {Integer} New index after parsing
+ */
+
+ Cea708Stream.prototype.handleText = function (i, service, options) {
+ var isExtended = options && options.isExtended;
+ var isMultiByte = options && options.isMultiByte;
+ var packetData = this.current708Packet.data;
+ var extended = isExtended ? 0x1000 : 0x0000;
+ var currentByte = packetData[i];
+ var nextByte = packetData[i + 1];
+ var win = service.currentWindow;
+ var char;
+ var charCodeArray; // Converts an array of bytes to a unicode hex string.
+
+ function toHexString(byteArray) {
+ return byteArray.map(byte => {
+ return ('0' + (byte & 0xFF).toString(16)).slice(-2);
+ }).join('');
+ }
+ if (isMultiByte) {
+ charCodeArray = [currentByte, nextByte];
+ i++;
+ } else {
+ charCodeArray = [currentByte];
+ } // Use the TextDecoder if one was created for this service
+
+ if (service.textDecoder_ && !isExtended) {
+ char = service.textDecoder_.decode(new Uint8Array(charCodeArray));
+ } else {
+ // We assume any multi-byte char without a decoder is unicode.
+ if (isMultiByte) {
+ const unicode = toHexString(charCodeArray); // Takes a unicode hex string and creates a single character.
+
+ char = String.fromCharCode(parseInt(unicode, 16));
+ } else {
+ char = get708CharFromCode(extended | currentByte);
+ }
+ }
+ if (win.pendingNewLine && !win.isEmpty()) {
+ win.newLine(this.getPts(i));
+ }
+ win.pendingNewLine = false;
+ win.addText(char);
+ return i;
+ };
+ /**
+ * Handle decoding of multibyte character
+ *
+ * @param {Integer} i Current index in the 708 packet
+ * @param {Service} service The service object to be affected
+ * @return {Integer} New index after parsing
+ */
+
+ Cea708Stream.prototype.multiByteCharacter = function (i, service) {
+ var packetData = this.current708Packet.data;
+ var firstByte = packetData[i + 1];
+ var secondByte = packetData[i + 2];
+ if (within708TextBlock(firstByte) && within708TextBlock(secondByte)) {
+ i = this.handleText(++i, service, {
+ isMultiByte: true
+ });
+ }
+ return i;
+ };
+ /**
+ * Parse and execute the CW# command.
+ *
+ * Set the current window.
+ *
+ * @param {Integer} i Current index in the 708 packet
+ * @param {Service} service The service object to be affected
+ * @return {Integer} New index after parsing
+ */
+
+ Cea708Stream.prototype.setCurrentWindow = function (i, service) {
+ var packetData = this.current708Packet.data;
+ var b = packetData[i];
+ var windowNum = b & 0x07;
+ service.setCurrentWindow(windowNum);
+ return i;
+ };
+ /**
+ * Parse and execute the DF# command.
+ *
+ * Define a window and set it as the current window.
+ *
+ * @param {Integer} i Current index in the 708 packet
+ * @param {Service} service The service object to be affected
+ * @return {Integer} New index after parsing
+ */
+
+ Cea708Stream.prototype.defineWindow = function (i, service) {
+ var packetData = this.current708Packet.data;
+ var b = packetData[i];
+ var windowNum = b & 0x07;
+ service.setCurrentWindow(windowNum);
+ var win = service.currentWindow;
+ b = packetData[++i];
+ win.visible = (b & 0x20) >> 5; // v
+
+ win.rowLock = (b & 0x10) >> 4; // rl
+
+ win.columnLock = (b & 0x08) >> 3; // cl
+
+ win.priority = b & 0x07; // p
+
+ b = packetData[++i];
+ win.relativePositioning = (b & 0x80) >> 7; // rp
+
+ win.anchorVertical = b & 0x7f; // av
+
+ b = packetData[++i];
+ win.anchorHorizontal = b; // ah
+
+ b = packetData[++i];
+ win.anchorPoint = (b & 0xf0) >> 4; // ap
+
+ win.rowCount = b & 0x0f; // rc
+
+ b = packetData[++i];
+ win.columnCount = b & 0x3f; // cc
+
+ b = packetData[++i];
+ win.windowStyle = (b & 0x38) >> 3; // ws
+
+ win.penStyle = b & 0x07; // ps
+ // The spec says there are (rowCount+1) "virtual rows"
+
+ win.virtualRowCount = win.rowCount + 1;
+ return i;
+ };
+ /**
+ * Parse and execute the SWA command.
+ *
+ * Set attributes of the current window.
+ *
+ * @param {Integer} i Current index in the 708 packet
+ * @param {Service} service The service object to be affected
+ * @return {Integer} New index after parsing
+ */
+
+ Cea708Stream.prototype.setWindowAttributes = function (i, service) {
+ var packetData = this.current708Packet.data;
+ var b = packetData[i];
+ var winAttr = service.currentWindow.winAttr;
+ b = packetData[++i];
+ winAttr.fillOpacity = (b & 0xc0) >> 6; // fo
+
+ winAttr.fillRed = (b & 0x30) >> 4; // fr
+
+ winAttr.fillGreen = (b & 0x0c) >> 2; // fg
+
+ winAttr.fillBlue = b & 0x03; // fb
+
+ b = packetData[++i];
+ winAttr.borderType = (b & 0xc0) >> 6; // bt
+
+ winAttr.borderRed = (b & 0x30) >> 4; // br
+
+ winAttr.borderGreen = (b & 0x0c) >> 2; // bg
+
+ winAttr.borderBlue = b & 0x03; // bb
+
+ b = packetData[++i];
+ winAttr.borderType += (b & 0x80) >> 5; // bt
+
+ winAttr.wordWrap = (b & 0x40) >> 6; // ww
+
+ winAttr.printDirection = (b & 0x30) >> 4; // pd
+
+ winAttr.scrollDirection = (b & 0x0c) >> 2; // sd
+
+ winAttr.justify = b & 0x03; // j
+
+ b = packetData[++i];
+ winAttr.effectSpeed = (b & 0xf0) >> 4; // es
+
+ winAttr.effectDirection = (b & 0x0c) >> 2; // ed
+
+ winAttr.displayEffect = b & 0x03; // de
+
+ return i;
+ };
+ /**
+ * Gather text from all displayed windows and push a caption to output.
+ *
+ * @param {Integer} i Current index in the 708 packet
+ * @param {Service} service The service object to be affected
+ */
+
+ Cea708Stream.prototype.flushDisplayed = function (pts, service) {
+ var displayedText = []; // TODO: Positioning not supported, displaying multiple windows will not necessarily
+ // display text in the correct order, but sample files so far have not shown any issue.
+
+ for (var winId = 0; winId < 8; winId++) {
+ if (service.windows[winId].visible && !service.windows[winId].isEmpty()) {
+ displayedText.push(service.windows[winId].getText());
+ }
+ }
+ service.endPts = pts;
+ service.text = displayedText.join('\n\n');
+ this.pushCaption(service);
+ service.startPts = pts;
+ };
+ /**
+ * Push a caption to output if the caption contains text.
+ *
+ * @param {Service} service The service object to be affected
+ */
+
+ Cea708Stream.prototype.pushCaption = function (service) {
+ if (service.text !== '') {
+ this.trigger('data', {
+ startPts: service.startPts,
+ endPts: service.endPts,
+ text: service.text,
+ stream: 'cc708_' + service.serviceNum
+ });
+ service.text = '';
+ service.startPts = service.endPts;
+ }
+ };
+ /**
+ * Parse and execute the DSW command.
+ *
+ * Set visible property of windows based on the parsed bitmask.
+ *
+ * @param {Integer} i Current index in the 708 packet
+ * @param {Service} service The service object to be affected
+ * @return {Integer} New index after parsing
+ */
+
+ Cea708Stream.prototype.displayWindows = function (i, service) {
+ var packetData = this.current708Packet.data;
+ var b = packetData[++i];
+ var pts = this.getPts(i);
+ this.flushDisplayed(pts, service);
+ for (var winId = 0; winId < 8; winId++) {
+ if (b & 0x01 << winId) {
+ service.windows[winId].visible = 1;
+ }
+ }
+ return i;
+ };
+ /**
+ * Parse and execute the HDW command.
+ *
+ * Set visible property of windows based on the parsed bitmask.
+ *
+ * @param {Integer} i Current index in the 708 packet
+ * @param {Service} service The service object to be affected
+ * @return {Integer} New index after parsing
+ */
+
+ Cea708Stream.prototype.hideWindows = function (i, service) {
+ var packetData = this.current708Packet.data;
+ var b = packetData[++i];
+ var pts = this.getPts(i);
+ this.flushDisplayed(pts, service);
+ for (var winId = 0; winId < 8; winId++) {
+ if (b & 0x01 << winId) {
+ service.windows[winId].visible = 0;
+ }
+ }
+ return i;
+ };
+ /**
+ * Parse and execute the TGW command.
+ *
+ * Set visible property of windows based on the parsed bitmask.
+ *
+ * @param {Integer} i Current index in the 708 packet
+ * @param {Service} service The service object to be affected
+ * @return {Integer} New index after parsing
+ */
+
+ Cea708Stream.prototype.toggleWindows = function (i, service) {
+ var packetData = this.current708Packet.data;
+ var b = packetData[++i];
+ var pts = this.getPts(i);
+ this.flushDisplayed(pts, service);
+ for (var winId = 0; winId < 8; winId++) {
+ if (b & 0x01 << winId) {
+ service.windows[winId].visible ^= 1;
+ }
+ }
+ return i;
+ };
+ /**
+ * Parse and execute the CLW command.
+ *
+ * Clear text of windows based on the parsed bitmask.
+ *
+ * @param {Integer} i Current index in the 708 packet
+ * @param {Service} service The service object to be affected
+ * @return {Integer} New index after parsing
+ */
+
+ Cea708Stream.prototype.clearWindows = function (i, service) {
+ var packetData = this.current708Packet.data;
+ var b = packetData[++i];
+ var pts = this.getPts(i);
+ this.flushDisplayed(pts, service);
+ for (var winId = 0; winId < 8; winId++) {
+ if (b & 0x01 << winId) {
+ service.windows[winId].clearText();
+ }
+ }
+ return i;
+ };
+ /**
+ * Parse and execute the DLW command.
+ *
+ * Re-initialize windows based on the parsed bitmask.
+ *
+ * @param {Integer} i Current index in the 708 packet
+ * @param {Service} service The service object to be affected
+ * @return {Integer} New index after parsing
+ */
+
+ Cea708Stream.prototype.deleteWindows = function (i, service) {
+ var packetData = this.current708Packet.data;
+ var b = packetData[++i];
+ var pts = this.getPts(i);
+ this.flushDisplayed(pts, service);
+ for (var winId = 0; winId < 8; winId++) {
+ if (b & 0x01 << winId) {
+ service.windows[winId].reset();
+ }
+ }
+ return i;
+ };
+ /**
+ * Parse and execute the SPA command.
+ *
+ * Set pen attributes of the current window.
+ *
+ * @param {Integer} i Current index in the 708 packet
+ * @param {Service} service The service object to be affected
+ * @return {Integer} New index after parsing
+ */
+
+ Cea708Stream.prototype.setPenAttributes = function (i, service) {
+ var packetData = this.current708Packet.data;
+ var b = packetData[i];
+ var penAttr = service.currentWindow.penAttr;
+ b = packetData[++i];
+ penAttr.textTag = (b & 0xf0) >> 4; // tt
+
+ penAttr.offset = (b & 0x0c) >> 2; // o
+
+ penAttr.penSize = b & 0x03; // s
+
+ b = packetData[++i];
+ penAttr.italics = (b & 0x80) >> 7; // i
+
+ penAttr.underline = (b & 0x40) >> 6; // u
+
+ penAttr.edgeType = (b & 0x38) >> 3; // et
+
+ penAttr.fontStyle = b & 0x07; // fs
+
+ return i;
+ };
+ /**
+ * Parse and execute the SPC command.
+ *
+ * Set pen color of the current window.
+ *
+ * @param {Integer} i Current index in the 708 packet
+ * @param {Service} service The service object to be affected
+ * @return {Integer} New index after parsing
+ */
+
+ Cea708Stream.prototype.setPenColor = function (i, service) {
+ var packetData = this.current708Packet.data;
+ var b = packetData[i];
+ var penColor = service.currentWindow.penColor;
+ b = packetData[++i];
+ penColor.fgOpacity = (b & 0xc0) >> 6; // fo
+
+ penColor.fgRed = (b & 0x30) >> 4; // fr
+
+ penColor.fgGreen = (b & 0x0c) >> 2; // fg
+
+ penColor.fgBlue = b & 0x03; // fb
+
+ b = packetData[++i];
+ penColor.bgOpacity = (b & 0xc0) >> 6; // bo
+
+ penColor.bgRed = (b & 0x30) >> 4; // br
+
+ penColor.bgGreen = (b & 0x0c) >> 2; // bg
+
+ penColor.bgBlue = b & 0x03; // bb
+
+ b = packetData[++i];
+ penColor.edgeRed = (b & 0x30) >> 4; // er
+
+ penColor.edgeGreen = (b & 0x0c) >> 2; // eg
+
+ penColor.edgeBlue = b & 0x03; // eb
+
+ return i;
+ };
+ /**
+ * Parse and execute the SPL command.
+ *
+ * Set pen location of the current window.
+ *
+ * @param {Integer} i Current index in the 708 packet
+ * @param {Service} service The service object to be affected
+ * @return {Integer} New index after parsing
+ */
+
+ Cea708Stream.prototype.setPenLocation = function (i, service) {
+ var packetData = this.current708Packet.data;
+ var b = packetData[i];
+ var penLoc = service.currentWindow.penLoc; // Positioning isn't really supported at the moment, so this essentially just inserts a linebreak
+
+ service.currentWindow.pendingNewLine = true;
+ b = packetData[++i];
+ penLoc.row = b & 0x0f; // r
+
+ b = packetData[++i];
+ penLoc.column = b & 0x3f; // c
+
+ return i;
+ };
+ /**
+ * Execute the RST command.
+ *
+ * Reset service to a clean slate. Re-initialize.
+ *
+ * @param {Integer} i Current index in the 708 packet
+ * @param {Service} service The service object to be affected
+ * @return {Service} Re-initialized service
+ */
+
+ Cea708Stream.prototype.reset = function (i, service) {
+ var pts = this.getPts(i);
+ this.flushDisplayed(pts, service);
+ return this.initService(service.serviceNum, i);
+ }; // This hash maps non-ASCII, special, and extended character codes to their
+ // proper Unicode equivalent. The first keys that are only a single byte
+ // are the non-standard ASCII characters, which simply map the CEA608 byte
+ // to the standard ASCII/Unicode. The two-byte keys that follow are the CEA608
+ // character codes, but have their MSB bitmasked with 0x03 so that a lookup
+ // can be performed regardless of the field and data channel on which the
+ // character code was received.
+
+ var CHARACTER_TRANSLATION = {
+ 0x2a: 0xe1,
+ // á
+ 0x5c: 0xe9,
+ // é
+ 0x5e: 0xed,
+ // í
+ 0x5f: 0xf3,
+ // ó
+ 0x60: 0xfa,
+ // ú
+ 0x7b: 0xe7,
+ // ç
+ 0x7c: 0xf7,
+ // ÷
+ 0x7d: 0xd1,
+ // Ñ
+ 0x7e: 0xf1,
+ // ñ
+ 0x7f: 0x2588,
+ // █
+ 0x0130: 0xae,
+ // ®
+ 0x0131: 0xb0,
+ // °
+ 0x0132: 0xbd,
+ // ½
+ 0x0133: 0xbf,
+ // ¿
+ 0x0134: 0x2122,
+ // ™
+ 0x0135: 0xa2,
+ // ¢
+ 0x0136: 0xa3,
+ // £
+ 0x0137: 0x266a,
+ // ♪
+ 0x0138: 0xe0,
+ // à
+ 0x0139: 0xa0,
+ //
+ 0x013a: 0xe8,
+ // è
+ 0x013b: 0xe2,
+ // â
+ 0x013c: 0xea,
+ // ê
+ 0x013d: 0xee,
+ // î
+ 0x013e: 0xf4,
+ // ô
+ 0x013f: 0xfb,
+ // û
+ 0x0220: 0xc1,
+ // Á
+ 0x0221: 0xc9,
+ // É
+ 0x0222: 0xd3,
+ // Ó
+ 0x0223: 0xda,
+ // Ú
+ 0x0224: 0xdc,
+ // Ü
+ 0x0225: 0xfc,
+ // ü
+ 0x0226: 0x2018,
+ // ‘
+ 0x0227: 0xa1,
+ // ¡
+ 0x0228: 0x2a,
+ // *
+ 0x0229: 0x27,
+ // '
+ 0x022a: 0x2014,
+ // —
+ 0x022b: 0xa9,
+ // ©
+ 0x022c: 0x2120,
+ // ℠
+ 0x022d: 0x2022,
+ // •
+ 0x022e: 0x201c,
+ // “
+ 0x022f: 0x201d,
+ // ”
+ 0x0230: 0xc0,
+ // À
+ 0x0231: 0xc2,
+ // Â
+ 0x0232: 0xc7,
+ // Ç
+ 0x0233: 0xc8,
+ // È
+ 0x0234: 0xca,
+ // Ê
+ 0x0235: 0xcb,
+ // Ë
+ 0x0236: 0xeb,
+ // ë
+ 0x0237: 0xce,
+ // Î
+ 0x0238: 0xcf,
+ // Ï
+ 0x0239: 0xef,
+ // ï
+ 0x023a: 0xd4,
+ // Ô
+ 0x023b: 0xd9,
+ // Ù
+ 0x023c: 0xf9,
+ // ù
+ 0x023d: 0xdb,
+ // Û
+ 0x023e: 0xab,
+ // «
+ 0x023f: 0xbb,
+ // »
+ 0x0320: 0xc3,
+ // Ã
+ 0x0321: 0xe3,
+ // ã
+ 0x0322: 0xcd,
+ // Í
+ 0x0323: 0xcc,
+ // Ì
+ 0x0324: 0xec,
+ // ì
+ 0x0325: 0xd2,
+ // Ò
+ 0x0326: 0xf2,
+ // ò
+ 0x0327: 0xd5,
+ // Õ
+ 0x0328: 0xf5,
+ // õ
+ 0x0329: 0x7b,
+ // {
+ 0x032a: 0x7d,
+ // }
+ 0x032b: 0x5c,
+ // \
+ 0x032c: 0x5e,
+ // ^
+ 0x032d: 0x5f,
+ // _
+ 0x032e: 0x7c,
+ // |
+ 0x032f: 0x7e,
+ // ~
+ 0x0330: 0xc4,
+ // Ä
+ 0x0331: 0xe4,
+ // ä
+ 0x0332: 0xd6,
+ // Ö
+ 0x0333: 0xf6,
+ // ö
+ 0x0334: 0xdf,
+ // ß
+ 0x0335: 0xa5,
+ // ¥
+ 0x0336: 0xa4,
+ // ¤
+ 0x0337: 0x2502,
+ // │
+ 0x0338: 0xc5,
+ // Å
+ 0x0339: 0xe5,
+ // å
+ 0x033a: 0xd8,
+ // Ø
+ 0x033b: 0xf8,
+ // ø
+ 0x033c: 0x250c,
+ // ┌
+ 0x033d: 0x2510,
+ // ┐
+ 0x033e: 0x2514,
+ // └
+ 0x033f: 0x2518 // ┘
+ };
+
+ var getCharFromCode = function (code) {
+ if (code === null) {
+ return '';
+ }
+ code = CHARACTER_TRANSLATION[code] || code;
+ return String.fromCharCode(code);
+ }; // the index of the last row in a CEA-608 display buffer
+
+ var BOTTOM_ROW = 14; // This array is used for mapping PACs -> row #, since there's no way of
+ // getting it through bit logic.
+
+ var ROWS = [0x1100, 0x1120, 0x1200, 0x1220, 0x1500, 0x1520, 0x1600, 0x1620, 0x1700, 0x1720, 0x1000, 0x1300, 0x1320, 0x1400, 0x1420]; // CEA-608 captions are rendered onto a 34x15 matrix of character
+ // cells. The "bottom" row is the last element in the outer array.
+ // We keep track of positioning information as we go by storing the
+ // number of indentations and the tab offset in this buffer.
+
+ var createDisplayBuffer = function () {
+ var result = [],
+ i = BOTTOM_ROW + 1;
+ while (i--) {
+ result.push({
+ text: '',
+ indent: 0,
+ offset: 0
+ });
+ }
+ return result;
+ };
+ var Cea608Stream = function (field, dataChannel) {
+ Cea608Stream.prototype.init.call(this);
+ this.field_ = field || 0;
+ this.dataChannel_ = dataChannel || 0;
+ this.name_ = 'CC' + ((this.field_ << 1 | this.dataChannel_) + 1);
+ this.setConstants();
+ this.reset();
+ this.push = function (packet) {
+ var data, swap, char0, char1, text; // remove the parity bits
+
+ data = packet.ccData & 0x7f7f; // ignore duplicate control codes; the spec demands they're sent twice
+
+ if (data === this.lastControlCode_) {
+ this.lastControlCode_ = null;
+ return;
+ } // Store control codes
+
+ if ((data & 0xf000) === 0x1000) {
+ this.lastControlCode_ = data;
+ } else if (data !== this.PADDING_) {
+ this.lastControlCode_ = null;
+ }
+ char0 = data >>> 8;
+ char1 = data & 0xff;
+ if (data === this.PADDING_) {
+ return;
+ } else if (data === this.RESUME_CAPTION_LOADING_) {
+ this.mode_ = 'popOn';
+ } else if (data === this.END_OF_CAPTION_) {
+ // If an EOC is received while in paint-on mode, the displayed caption
+ // text should be swapped to non-displayed memory as if it was a pop-on
+ // caption. Because of that, we should explicitly switch back to pop-on
+ // mode
+ this.mode_ = 'popOn';
+ this.clearFormatting(packet.pts); // if a caption was being displayed, it's gone now
+
+ this.flushDisplayed(packet.pts); // flip memory
+
+ swap = this.displayed_;
+ this.displayed_ = this.nonDisplayed_;
+ this.nonDisplayed_ = swap; // start measuring the time to display the caption
+
+ this.startPts_ = packet.pts;
+ } else if (data === this.ROLL_UP_2_ROWS_) {
+ this.rollUpRows_ = 2;
+ this.setRollUp(packet.pts);
+ } else if (data === this.ROLL_UP_3_ROWS_) {
+ this.rollUpRows_ = 3;
+ this.setRollUp(packet.pts);
+ } else if (data === this.ROLL_UP_4_ROWS_) {
+ this.rollUpRows_ = 4;
+ this.setRollUp(packet.pts);
+ } else if (data === this.CARRIAGE_RETURN_) {
+ this.clearFormatting(packet.pts);
+ this.flushDisplayed(packet.pts);
+ this.shiftRowsUp_();
+ this.startPts_ = packet.pts;
+ } else if (data === this.BACKSPACE_) {
+ if (this.mode_ === 'popOn') {
+ this.nonDisplayed_[this.row_].text = this.nonDisplayed_[this.row_].text.slice(0, -1);
+ } else {
+ this.displayed_[this.row_].text = this.displayed_[this.row_].text.slice(0, -1);
+ }
+ } else if (data === this.ERASE_DISPLAYED_MEMORY_) {
+ this.flushDisplayed(packet.pts);
+ this.displayed_ = createDisplayBuffer();
+ } else if (data === this.ERASE_NON_DISPLAYED_MEMORY_) {
+ this.nonDisplayed_ = createDisplayBuffer();
+ } else if (data === this.RESUME_DIRECT_CAPTIONING_) {
+ if (this.mode_ !== 'paintOn') {
+ // NOTE: This should be removed when proper caption positioning is
+ // implemented
+ this.flushDisplayed(packet.pts);
+ this.displayed_ = createDisplayBuffer();
+ }
+ this.mode_ = 'paintOn';
+ this.startPts_ = packet.pts; // Append special characters to caption text
+ } else if (this.isSpecialCharacter(char0, char1)) {
+ // Bitmask char0 so that we can apply character transformations
+ // regardless of field and data channel.
+ // Then byte-shift to the left and OR with char1 so we can pass the
+ // entire character code to `getCharFromCode`.
+ char0 = (char0 & 0x03) << 8;
+ text = getCharFromCode(char0 | char1);
+ this[this.mode_](packet.pts, text);
+ this.column_++; // Append extended characters to caption text
+ } else if (this.isExtCharacter(char0, char1)) {
+ // Extended characters always follow their "non-extended" equivalents.
+ // IE if a "è" is desired, you'll always receive "eè"; non-compliant
+ // decoders are supposed to drop the "è", while compliant decoders
+ // backspace the "e" and insert "è".
+ // Delete the previous character
+ if (this.mode_ === 'popOn') {
+ this.nonDisplayed_[this.row_].text = this.nonDisplayed_[this.row_].text.slice(0, -1);
+ } else {
+ this.displayed_[this.row_].text = this.displayed_[this.row_].text.slice(0, -1);
+ } // Bitmask char0 so that we can apply character transformations
+ // regardless of field and data channel.
+ // Then byte-shift to the left and OR with char1 so we can pass the
+ // entire character code to `getCharFromCode`.
+
+ char0 = (char0 & 0x03) << 8;
+ text = getCharFromCode(char0 | char1);
+ this[this.mode_](packet.pts, text);
+ this.column_++; // Process mid-row codes
+ } else if (this.isMidRowCode(char0, char1)) {
+ // Attributes are not additive, so clear all formatting
+ this.clearFormatting(packet.pts); // According to the standard, mid-row codes
+ // should be replaced with spaces, so add one now
+
+ this[this.mode_](packet.pts, ' ');
+ this.column_++;
+ if ((char1 & 0xe) === 0xe) {
+ this.addFormatting(packet.pts, ['i']);
+ }
+ if ((char1 & 0x1) === 0x1) {
+ this.addFormatting(packet.pts, ['u']);
+ } // Detect offset control codes and adjust cursor
+ } else if (this.isOffsetControlCode(char0, char1)) {
+ // Cursor position is set by indent PAC (see below) in 4-column
+ // increments, with an additional offset code of 1-3 to reach any
+ // of the 32 columns specified by CEA-608. So all we need to do
+ // here is increment the column cursor by the given offset.
+ const offset = char1 & 0x03; // For an offest value 1-3, set the offset for that caption
+ // in the non-displayed array.
+
+ this.nonDisplayed_[this.row_].offset = offset;
+ this.column_ += offset; // Detect PACs (Preamble Address Codes)
+ } else if (this.isPAC(char0, char1)) {
+ // There's no logic for PAC -> row mapping, so we have to just
+ // find the row code in an array and use its index :(
+ var row = ROWS.indexOf(data & 0x1f20); // Configure the caption window if we're in roll-up mode
+
+ if (this.mode_ === 'rollUp') {
+ // This implies that the base row is incorrectly set.
+ // As per the recommendation in CEA-608(Base Row Implementation), defer to the number
+ // of roll-up rows set.
+ if (row - this.rollUpRows_ + 1 < 0) {
+ row = this.rollUpRows_ - 1;
+ }
+ this.setRollUp(packet.pts, row);
+ } // Ensure the row is between 0 and 14, otherwise use the most
+ // recent or default row.
+
+ if (row !== this.row_ && row >= 0 && row <= 14) {
+ // formatting is only persistent for current row
+ this.clearFormatting(packet.pts);
+ this.row_ = row;
+ } // All PACs can apply underline, so detect and apply
+ // (All odd-numbered second bytes set underline)
+
+ if (char1 & 0x1 && this.formatting_.indexOf('u') === -1) {
+ this.addFormatting(packet.pts, ['u']);
+ }
+ if ((data & 0x10) === 0x10) {
+ // We've got an indent level code. Each successive even number
+ // increments the column cursor by 4, so we can get the desired
+ // column position by bit-shifting to the right (to get n/2)
+ // and multiplying by 4.
+ const indentations = (data & 0xe) >> 1;
+ this.column_ = indentations * 4; // add to the number of indentations for positioning
+
+ this.nonDisplayed_[this.row_].indent += indentations;
+ }
+ if (this.isColorPAC(char1)) {
+ // it's a color code, though we only support white, which
+ // can be either normal or italicized. white italics can be
+ // either 0x4e or 0x6e depending on the row, so we just
+ // bitwise-and with 0xe to see if italics should be turned on
+ if ((char1 & 0xe) === 0xe) {
+ this.addFormatting(packet.pts, ['i']);
+ }
+ } // We have a normal character in char0, and possibly one in char1
+ } else if (this.isNormalChar(char0)) {
+ if (char1 === 0x00) {
+ char1 = null;
+ }
+ text = getCharFromCode(char0);
+ text += getCharFromCode(char1);
+ this[this.mode_](packet.pts, text);
+ this.column_ += text.length;
+ } // finish data processing
+ };
+ };
+
+ Cea608Stream.prototype = new Stream$7(); // Trigger a cue point that captures the current state of the
+ // display buffer
+
+ Cea608Stream.prototype.flushDisplayed = function (pts) {
+ const logWarning = index => {
+ this.trigger('log', {
+ level: 'warn',
+ message: 'Skipping a malformed 608 caption at index ' + index + '.'
+ });
+ };
+ const content = [];
+ this.displayed_.forEach((row, i) => {
+ if (row && row.text && row.text.length) {
+ try {
+ // remove spaces from the start and end of the string
+ row.text = row.text.trim();
+ } catch (e) {
+ // Ordinarily, this shouldn't happen. However, caption
+ // parsing errors should not throw exceptions and
+ // break playback.
+ logWarning(i);
+ } // See the below link for more details on the following fields:
+ // https://dvcs.w3.org/hg/text-tracks/raw-file/default/608toVTT/608toVTT.html#positioning-in-cea-608
+
+ if (row.text.length) {
+ content.push({
+ // The text to be displayed in the caption from this specific row, with whitespace removed.
+ text: row.text,
+ // Value between 1 and 15 representing the PAC row used to calculate line height.
+ line: i + 1,
+ // A number representing the indent position by percentage (CEA-608 PAC indent code).
+ // The value will be a number between 10 and 80. Offset is used to add an aditional
+ // value to the position if necessary.
+ position: 10 + Math.min(70, row.indent * 10) + row.offset * 2.5
+ });
+ }
+ } else if (row === undefined || row === null) {
+ logWarning(i);
+ }
+ });
+ if (content.length) {
+ this.trigger('data', {
+ startPts: this.startPts_,
+ endPts: pts,
+ content,
+ stream: this.name_
+ });
+ }
+ };
+ /**
+ * Zero out the data, used for startup and on seek
+ */
+
+ Cea608Stream.prototype.reset = function () {
+ this.mode_ = 'popOn'; // When in roll-up mode, the index of the last row that will
+ // actually display captions. If a caption is shifted to a row
+ // with a lower index than this, it is cleared from the display
+ // buffer
+
+ this.topRow_ = 0;
+ this.startPts_ = 0;
+ this.displayed_ = createDisplayBuffer();
+ this.nonDisplayed_ = createDisplayBuffer();
+ this.lastControlCode_ = null; // Track row and column for proper line-breaking and spacing
+
+ this.column_ = 0;
+ this.row_ = BOTTOM_ROW;
+ this.rollUpRows_ = 2; // This variable holds currently-applied formatting
+
+ this.formatting_ = [];
+ };
+ /**
+ * Sets up control code and related constants for this instance
+ */
+
+ Cea608Stream.prototype.setConstants = function () {
+ // The following attributes have these uses:
+ // ext_ : char0 for mid-row codes, and the base for extended
+ // chars (ext_+0, ext_+1, and ext_+2 are char0s for
+ // extended codes)
+ // control_: char0 for control codes, except byte-shifted to the
+ // left so that we can do this.control_ | CONTROL_CODE
+ // offset_: char0 for tab offset codes
+ //
+ // It's also worth noting that control codes, and _only_ control codes,
+ // differ between field 1 and field2. Field 2 control codes are always
+ // their field 1 value plus 1. That's why there's the "| field" on the
+ // control value.
+ if (this.dataChannel_ === 0) {
+ this.BASE_ = 0x10;
+ this.EXT_ = 0x11;
+ this.CONTROL_ = (0x14 | this.field_) << 8;
+ this.OFFSET_ = 0x17;
+ } else if (this.dataChannel_ === 1) {
+ this.BASE_ = 0x18;
+ this.EXT_ = 0x19;
+ this.CONTROL_ = (0x1c | this.field_) << 8;
+ this.OFFSET_ = 0x1f;
+ } // Constants for the LSByte command codes recognized by Cea608Stream. This
+ // list is not exhaustive. For a more comprehensive listing and semantics see
+ // http://www.gpo.gov/fdsys/pkg/CFR-2010-title47-vol1/pdf/CFR-2010-title47-vol1-sec15-119.pdf
+ // Padding
+
+ this.PADDING_ = 0x0000; // Pop-on Mode
+
+ this.RESUME_CAPTION_LOADING_ = this.CONTROL_ | 0x20;
+ this.END_OF_CAPTION_ = this.CONTROL_ | 0x2f; // Roll-up Mode
+
+ this.ROLL_UP_2_ROWS_ = this.CONTROL_ | 0x25;
+ this.ROLL_UP_3_ROWS_ = this.CONTROL_ | 0x26;
+ this.ROLL_UP_4_ROWS_ = this.CONTROL_ | 0x27;
+ this.CARRIAGE_RETURN_ = this.CONTROL_ | 0x2d; // paint-on mode
+
+ this.RESUME_DIRECT_CAPTIONING_ = this.CONTROL_ | 0x29; // Erasure
+
+ this.BACKSPACE_ = this.CONTROL_ | 0x21;
+ this.ERASE_DISPLAYED_MEMORY_ = this.CONTROL_ | 0x2c;
+ this.ERASE_NON_DISPLAYED_MEMORY_ = this.CONTROL_ | 0x2e;
+ };
+ /**
+ * Detects if the 2-byte packet data is a special character
+ *
+ * Special characters have a second byte in the range 0x30 to 0x3f,
+ * with the first byte being 0x11 (for data channel 1) or 0x19 (for
+ * data channel 2).
+ *
+ * @param {Integer} char0 The first byte
+ * @param {Integer} char1 The second byte
+ * @return {Boolean} Whether the 2 bytes are an special character
+ */
+
+ Cea608Stream.prototype.isSpecialCharacter = function (char0, char1) {
+ return char0 === this.EXT_ && char1 >= 0x30 && char1 <= 0x3f;
+ };
+ /**
+ * Detects if the 2-byte packet data is an extended character
+ *
+ * Extended characters have a second byte in the range 0x20 to 0x3f,
+ * with the first byte being 0x12 or 0x13 (for data channel 1) or
+ * 0x1a or 0x1b (for data channel 2).
+ *
+ * @param {Integer} char0 The first byte
+ * @param {Integer} char1 The second byte
+ * @return {Boolean} Whether the 2 bytes are an extended character
+ */
+
+ Cea608Stream.prototype.isExtCharacter = function (char0, char1) {
+ return (char0 === this.EXT_ + 1 || char0 === this.EXT_ + 2) && char1 >= 0x20 && char1 <= 0x3f;
+ };
+ /**
+ * Detects if the 2-byte packet is a mid-row code
+ *
+ * Mid-row codes have a second byte in the range 0x20 to 0x2f, with
+ * the first byte being 0x11 (for data channel 1) or 0x19 (for data
+ * channel 2).
+ *
+ * @param {Integer} char0 The first byte
+ * @param {Integer} char1 The second byte
+ * @return {Boolean} Whether the 2 bytes are a mid-row code
+ */
+
+ Cea608Stream.prototype.isMidRowCode = function (char0, char1) {
+ return char0 === this.EXT_ && char1 >= 0x20 && char1 <= 0x2f;
+ };
+ /**
+ * Detects if the 2-byte packet is an offset control code
+ *
+ * Offset control codes have a second byte in the range 0x21 to 0x23,
+ * with the first byte being 0x17 (for data channel 1) or 0x1f (for
+ * data channel 2).
+ *
+ * @param {Integer} char0 The first byte
+ * @param {Integer} char1 The second byte
+ * @return {Boolean} Whether the 2 bytes are an offset control code
+ */
+
+ Cea608Stream.prototype.isOffsetControlCode = function (char0, char1) {
+ return char0 === this.OFFSET_ && char1 >= 0x21 && char1 <= 0x23;
+ };
+ /**
+ * Detects if the 2-byte packet is a Preamble Address Code
+ *
+ * PACs have a first byte in the range 0x10 to 0x17 (for data channel 1)
+ * or 0x18 to 0x1f (for data channel 2), with the second byte in the
+ * range 0x40 to 0x7f.
+ *
+ * @param {Integer} char0 The first byte
+ * @param {Integer} char1 The second byte
+ * @return {Boolean} Whether the 2 bytes are a PAC
+ */
+
+ Cea608Stream.prototype.isPAC = function (char0, char1) {
+ return char0 >= this.BASE_ && char0 < this.BASE_ + 8 && char1 >= 0x40 && char1 <= 0x7f;
+ };
+ /**
+ * Detects if a packet's second byte is in the range of a PAC color code
+ *
+ * PAC color codes have the second byte be in the range 0x40 to 0x4f, or
+ * 0x60 to 0x6f.
+ *
+ * @param {Integer} char1 The second byte
+ * @return {Boolean} Whether the byte is a color PAC
+ */
+
+ Cea608Stream.prototype.isColorPAC = function (char1) {
+ return char1 >= 0x40 && char1 <= 0x4f || char1 >= 0x60 && char1 <= 0x7f;
+ };
+ /**
+ * Detects if a single byte is in the range of a normal character
+ *
+ * Normal text bytes are in the range 0x20 to 0x7f.
+ *
+ * @param {Integer} char The byte
+ * @return {Boolean} Whether the byte is a normal character
+ */
+
+ Cea608Stream.prototype.isNormalChar = function (char) {
+ return char >= 0x20 && char <= 0x7f;
+ };
+ /**
+ * Configures roll-up
+ *
+ * @param {Integer} pts Current PTS
+ * @param {Integer} newBaseRow Used by PACs to slide the current window to
+ * a new position
+ */
+
+ Cea608Stream.prototype.setRollUp = function (pts, newBaseRow) {
+ // Reset the base row to the bottom row when switching modes
+ if (this.mode_ !== 'rollUp') {
+ this.row_ = BOTTOM_ROW;
+ this.mode_ = 'rollUp'; // Spec says to wipe memories when switching to roll-up
+
+ this.flushDisplayed(pts);
+ this.nonDisplayed_ = createDisplayBuffer();
+ this.displayed_ = createDisplayBuffer();
+ }
+ if (newBaseRow !== undefined && newBaseRow !== this.row_) {
+ // move currently displayed captions (up or down) to the new base row
+ for (var i = 0; i < this.rollUpRows_; i++) {
+ this.displayed_[newBaseRow - i] = this.displayed_[this.row_ - i];
+ this.displayed_[this.row_ - i] = {
+ text: '',
+ indent: 0,
+ offset: 0
+ };
+ }
+ }
+ if (newBaseRow === undefined) {
+ newBaseRow = this.row_;
+ }
+ this.topRow_ = newBaseRow - this.rollUpRows_ + 1;
+ }; // Adds the opening HTML tag for the passed character to the caption text,
+ // and keeps track of it for later closing
+
+ Cea608Stream.prototype.addFormatting = function (pts, format) {
+ this.formatting_ = this.formatting_.concat(format);
+ var text = format.reduce(function (text, format) {
+ return text + '<' + format + '>';
+ }, '');
+ this[this.mode_](pts, text);
+ }; // Adds HTML closing tags for current formatting to caption text and
+ // clears remembered formatting
+
+ Cea608Stream.prototype.clearFormatting = function (pts) {
+ if (!this.formatting_.length) {
+ return;
+ }
+ var text = this.formatting_.reverse().reduce(function (text, format) {
+ return text + '</' + format + '>';
+ }, '');
+ this.formatting_ = [];
+ this[this.mode_](pts, text);
+ }; // Mode Implementations
+
+ Cea608Stream.prototype.popOn = function (pts, text) {
+ var baseRow = this.nonDisplayed_[this.row_].text; // buffer characters
+
+ baseRow += text;
+ this.nonDisplayed_[this.row_].text = baseRow;
+ };
+ Cea608Stream.prototype.rollUp = function (pts, text) {
+ var baseRow = this.displayed_[this.row_].text;
+ baseRow += text;
+ this.displayed_[this.row_].text = baseRow;
+ };
+ Cea608Stream.prototype.shiftRowsUp_ = function () {
+ var i; // clear out inactive rows
+
+ for (i = 0; i < this.topRow_; i++) {
+ this.displayed_[i] = {
+ text: '',
+ indent: 0,
+ offset: 0
+ };
+ }
+ for (i = this.row_ + 1; i < BOTTOM_ROW + 1; i++) {
+ this.displayed_[i] = {
+ text: '',
+ indent: 0,
+ offset: 0
+ };
+ } // shift displayed rows up
+
+ for (i = this.topRow_; i < this.row_; i++) {
+ this.displayed_[i] = this.displayed_[i + 1];
+ } // clear out the bottom row
+
+ this.displayed_[this.row_] = {
+ text: '',
+ indent: 0,
+ offset: 0
+ };
+ };
+ Cea608Stream.prototype.paintOn = function (pts, text) {
+ var baseRow = this.displayed_[this.row_].text;
+ baseRow += text;
+ this.displayed_[this.row_].text = baseRow;
+ }; // exports
+
+ var captionStream = {
+ CaptionStream: CaptionStream$2,
+ Cea608Stream: Cea608Stream,
+ Cea708Stream: Cea708Stream
+ };
+ /**
+ * mux.js
+ *
+ * Copyright (c) Brightcove
+ * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
+ */
+
+ var streamTypes = {
+ H264_STREAM_TYPE: 0x1B,
+ ADTS_STREAM_TYPE: 0x0F,
+ METADATA_STREAM_TYPE: 0x15
+ };
+ /**
+ * mux.js
+ *
+ * Copyright (c) Brightcove
+ * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
+ *
+ * Accepts program elementary stream (PES) data events and corrects
+ * decode and presentation time stamps to account for a rollover
+ * of the 33 bit value.
+ */
+
+ var Stream$6 = stream;
+ var MAX_TS = 8589934592;
+ var RO_THRESH = 4294967296;
+ var TYPE_SHARED = 'shared';
+ var handleRollover$1 = function (value, reference) {
+ var direction = 1;
+ if (value > reference) {
+ // If the current timestamp value is greater than our reference timestamp and we detect a
+ // timestamp rollover, this means the roll over is happening in the opposite direction.
+ // Example scenario: Enter a long stream/video just after a rollover occurred. The reference
+ // point will be set to a small number, e.g. 1. The user then seeks backwards over the
+ // rollover point. In loading this segment, the timestamp values will be very large,
+ // e.g. 2^33 - 1. Since this comes before the data we loaded previously, we want to adjust
+ // the time stamp to be `value - 2^33`.
+ direction = -1;
+ } // Note: A seek forwards or back that is greater than the RO_THRESH (2^32, ~13 hours) will
+ // cause an incorrect adjustment.
+
+ while (Math.abs(reference - value) > RO_THRESH) {
+ value += direction * MAX_TS;
+ }
+ return value;
+ };
+ var TimestampRolloverStream$1 = function (type) {
+ var lastDTS, referenceDTS;
+ TimestampRolloverStream$1.prototype.init.call(this); // The "shared" type is used in cases where a stream will contain muxed
+ // video and audio. We could use `undefined` here, but having a string
+ // makes debugging a little clearer.
+
+ this.type_ = type || TYPE_SHARED;
+ this.push = function (data) {
+ /**
+ * Rollover stream expects data from elementary stream.
+ * Elementary stream can push forward 2 types of data
+ * - Parsed Video/Audio/Timed-metadata PES (packetized elementary stream) packets
+ * - Tracks metadata from PMT (Program Map Table)
+ * Rollover stream expects pts/dts info to be available, since it stores lastDTS
+ * We should ignore non-PES packets since they may override lastDTS to undefined.
+ * lastDTS is important to signal the next segments
+ * about rollover from the previous segments.
+ */
+ if (data.type === 'metadata') {
+ this.trigger('data', data);
+ return;
+ } // Any "shared" rollover streams will accept _all_ data. Otherwise,
+ // streams will only accept data that matches their type.
+
+ if (this.type_ !== TYPE_SHARED && data.type !== this.type_) {
+ return;
+ }
+ if (referenceDTS === undefined) {
+ referenceDTS = data.dts;
+ }
+ data.dts = handleRollover$1(data.dts, referenceDTS);
+ data.pts = handleRollover$1(data.pts, referenceDTS);
+ lastDTS = data.dts;
+ this.trigger('data', data);
+ };
+ this.flush = function () {
+ referenceDTS = lastDTS;
+ this.trigger('done');
+ };
+ this.endTimeline = function () {
+ this.flush();
+ this.trigger('endedtimeline');
+ };
+ this.discontinuity = function () {
+ referenceDTS = void 0;
+ lastDTS = void 0;
+ };
+ this.reset = function () {
+ this.discontinuity();
+ this.trigger('reset');
+ };
+ };
+ TimestampRolloverStream$1.prototype = new Stream$6();
+ var timestampRolloverStream = {
+ TimestampRolloverStream: TimestampRolloverStream$1,
+ handleRollover: handleRollover$1
+ }; // Once IE11 support is dropped, this function should be removed.
+
+ var typedArrayIndexOf$1 = (typedArray, element, fromIndex) => {
+ if (!typedArray) {
+ return -1;
+ }
+ var currentIndex = fromIndex;
+ for (; currentIndex < typedArray.length; currentIndex++) {
+ if (typedArray[currentIndex] === element) {
+ return currentIndex;
+ }
+ }
+ return -1;
+ };
+ var typedArray = {
+ typedArrayIndexOf: typedArrayIndexOf$1
+ };
+ /**
+ * mux.js
+ *
+ * Copyright (c) Brightcove
+ * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
+ *
+ * Tools for parsing ID3 frame data
+ * @see http://id3.org/id3v2.3.0
+ */
+
+ var typedArrayIndexOf = typedArray.typedArrayIndexOf,
+ // Frames that allow different types of text encoding contain a text
+ // encoding description byte [ID3v2.4.0 section 4.]
+ textEncodingDescriptionByte = {
+ Iso88591: 0x00,
+ // ISO-8859-1, terminated with \0.
+ Utf16: 0x01,
+ // UTF-16 encoded Unicode BOM, terminated with \0\0
+ Utf16be: 0x02,
+ // UTF-16BE encoded Unicode, without BOM, terminated with \0\0
+ Utf8: 0x03 // UTF-8 encoded Unicode, terminated with \0
+ },
+ // return a percent-encoded representation of the specified byte range
+ // @see http://en.wikipedia.org/wiki/Percent-encoding
+ percentEncode$1 = function (bytes, start, end) {
+ var i,
+ result = '';
+ for (i = start; i < end; i++) {
+ result += '%' + ('00' + bytes[i].toString(16)).slice(-2);
+ }
+ return result;
+ },
+ // return the string representation of the specified byte range,
+ // interpreted as UTf-8.
+ parseUtf8 = function (bytes, start, end) {
+ return decodeURIComponent(percentEncode$1(bytes, start, end));
+ },
+ // return the string representation of the specified byte range,
+ // interpreted as ISO-8859-1.
+ parseIso88591$1 = function (bytes, start, end) {
+ return unescape(percentEncode$1(bytes, start, end)); // jshint ignore:line
+ },
+ parseSyncSafeInteger$1 = function (data) {
+ return data[0] << 21 | data[1] << 14 | data[2] << 7 | data[3];
+ },
+ frameParsers = {
+ 'APIC': function (frame) {
+ var i = 1,
+ mimeTypeEndIndex,
+ descriptionEndIndex,
+ LINK_MIME_TYPE = '-->';
+ if (frame.data[0] !== textEncodingDescriptionByte.Utf8) {
+ // ignore frames with unrecognized character encodings
+ return;
+ } // parsing fields [ID3v2.4.0 section 4.14.]
+
+ mimeTypeEndIndex = typedArrayIndexOf(frame.data, 0, i);
+ if (mimeTypeEndIndex < 0) {
+ // malformed frame
+ return;
+ } // parsing Mime type field (terminated with \0)
+
+ frame.mimeType = parseIso88591$1(frame.data, i, mimeTypeEndIndex);
+ i = mimeTypeEndIndex + 1; // parsing 1-byte Picture Type field
+
+ frame.pictureType = frame.data[i];
+ i++;
+ descriptionEndIndex = typedArrayIndexOf(frame.data, 0, i);
+ if (descriptionEndIndex < 0) {
+ // malformed frame
+ return;
+ } // parsing Description field (terminated with \0)
+
+ frame.description = parseUtf8(frame.data, i, descriptionEndIndex);
+ i = descriptionEndIndex + 1;
+ if (frame.mimeType === LINK_MIME_TYPE) {
+ // parsing Picture Data field as URL (always represented as ISO-8859-1 [ID3v2.4.0 section 4.])
+ frame.url = parseIso88591$1(frame.data, i, frame.data.length);
+ } else {
+ // parsing Picture Data field as binary data
+ frame.pictureData = frame.data.subarray(i, frame.data.length);
+ }
+ },
+ 'T*': function (frame) {
+ if (frame.data[0] !== textEncodingDescriptionByte.Utf8) {
+ // ignore frames with unrecognized character encodings
+ return;
+ } // parse text field, do not include null terminator in the frame value
+ // frames that allow different types of encoding contain terminated text [ID3v2.4.0 section 4.]
+
+ frame.value = parseUtf8(frame.data, 1, frame.data.length).replace(/\0*$/, ''); // text information frames supports multiple strings, stored as a terminator separated list [ID3v2.4.0 section 4.2.]
+
+ frame.values = frame.value.split('\0');
+ },
+ 'TXXX': function (frame) {
+ var descriptionEndIndex;
+ if (frame.data[0] !== textEncodingDescriptionByte.Utf8) {
+ // ignore frames with unrecognized character encodings
+ return;
+ }
+ descriptionEndIndex = typedArrayIndexOf(frame.data, 0, 1);
+ if (descriptionEndIndex === -1) {
+ return;
+ } // parse the text fields
+
+ frame.description = parseUtf8(frame.data, 1, descriptionEndIndex); // do not include the null terminator in the tag value
+ // frames that allow different types of encoding contain terminated text
+ // [ID3v2.4.0 section 4.]
+
+ frame.value = parseUtf8(frame.data, descriptionEndIndex + 1, frame.data.length).replace(/\0*$/, '');
+ frame.data = frame.value;
+ },
+ 'W*': function (frame) {
+ // parse URL field; URL fields are always represented as ISO-8859-1 [ID3v2.4.0 section 4.]
+ // if the value is followed by a string termination all the following information should be ignored [ID3v2.4.0 section 4.3]
+ frame.url = parseIso88591$1(frame.data, 0, frame.data.length).replace(/\0.*$/, '');
+ },
+ 'WXXX': function (frame) {
+ var descriptionEndIndex;
+ if (frame.data[0] !== textEncodingDescriptionByte.Utf8) {
+ // ignore frames with unrecognized character encodings
+ return;
+ }
+ descriptionEndIndex = typedArrayIndexOf(frame.data, 0, 1);
+ if (descriptionEndIndex === -1) {
+ return;
+ } // parse the description and URL fields
+
+ frame.description = parseUtf8(frame.data, 1, descriptionEndIndex); // URL fields are always represented as ISO-8859-1 [ID3v2.4.0 section 4.]
+ // if the value is followed by a string termination all the following information
+ // should be ignored [ID3v2.4.0 section 4.3]
+
+ frame.url = parseIso88591$1(frame.data, descriptionEndIndex + 1, frame.data.length).replace(/\0.*$/, '');
+ },
+ 'PRIV': function (frame) {
+ var i;
+ for (i = 0; i < frame.data.length; i++) {
+ if (frame.data[i] === 0) {
+ // parse the description and URL fields
+ frame.owner = parseIso88591$1(frame.data, 0, i);
+ break;
+ }
+ }
+ frame.privateData = frame.data.subarray(i + 1);
+ frame.data = frame.privateData;
+ }
+ };
+ var parseId3Frames$1 = function (data) {
+ var frameSize,
+ frameHeader,
+ frameStart = 10,
+ tagSize = 0,
+ frames = []; // If we don't have enough data for a header, 10 bytes,
+ // or 'ID3' in the first 3 bytes this is not a valid ID3 tag.
+
+ if (data.length < 10 || data[0] !== 'I'.charCodeAt(0) || data[1] !== 'D'.charCodeAt(0) || data[2] !== '3'.charCodeAt(0)) {
+ return;
+ } // the frame size is transmitted as a 28-bit integer in the
+ // last four bytes of the ID3 header.
+ // The most significant bit of each byte is dropped and the
+ // results concatenated to recover the actual value.
+
+ tagSize = parseSyncSafeInteger$1(data.subarray(6, 10)); // ID3 reports the tag size excluding the header but it's more
+ // convenient for our comparisons to include it
+
+ tagSize += 10; // check bit 6 of byte 5 for the extended header flag.
+
+ var hasExtendedHeader = data[5] & 0x40;
+ if (hasExtendedHeader) {
+ // advance the frame start past the extended header
+ frameStart += 4; // header size field
+
+ frameStart += parseSyncSafeInteger$1(data.subarray(10, 14));
+ tagSize -= parseSyncSafeInteger$1(data.subarray(16, 20)); // clip any padding off the end
+ } // parse one or more ID3 frames
+ // http://id3.org/id3v2.3.0#ID3v2_frame_overview
+
+ do {
+ // determine the number of bytes in this frame
+ frameSize = parseSyncSafeInteger$1(data.subarray(frameStart + 4, frameStart + 8));
+ if (frameSize < 1) {
+ break;
+ }
+ frameHeader = String.fromCharCode(data[frameStart], data[frameStart + 1], data[frameStart + 2], data[frameStart + 3]);
+ var frame = {
+ id: frameHeader,
+ data: data.subarray(frameStart + 10, frameStart + frameSize + 10)
+ };
+ frame.key = frame.id; // parse frame values
+
+ if (frameParsers[frame.id]) {
+ // use frame specific parser
+ frameParsers[frame.id](frame);
+ } else if (frame.id[0] === 'T') {
+ // use text frame generic parser
+ frameParsers['T*'](frame);
+ } else if (frame.id[0] === 'W') {
+ // use URL link frame generic parser
+ frameParsers['W*'](frame);
+ }
+ frames.push(frame);
+ frameStart += 10; // advance past the frame header
+
+ frameStart += frameSize; // advance past the frame body
+ } while (frameStart < tagSize);
+ return frames;
+ };
+ var parseId3 = {
+ parseId3Frames: parseId3Frames$1,
+ parseSyncSafeInteger: parseSyncSafeInteger$1,
+ frameParsers: frameParsers
+ };
+ /**
+ * mux.js
+ *
+ * Copyright (c) Brightcove
+ * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
+ *
+ * Accepts program elementary stream (PES) data events and parses out
+ * ID3 metadata from them, if present.
+ * @see http://id3.org/id3v2.3.0
+ */
+
+ var Stream$5 = stream,
+ StreamTypes$3 = streamTypes,
+ id3 = parseId3,
+ MetadataStream;
+ MetadataStream = function (options) {
+ var settings = {
+ // the bytes of the program-level descriptor field in MP2T
+ // see ISO/IEC 13818-1:2013 (E), section 2.6 "Program and
+ // program element descriptors"
+ descriptor: options && options.descriptor
+ },
+ // the total size in bytes of the ID3 tag being parsed
+ tagSize = 0,
+ // tag data that is not complete enough to be parsed
+ buffer = [],
+ // the total number of bytes currently in the buffer
+ bufferSize = 0,
+ i;
+ MetadataStream.prototype.init.call(this); // calculate the text track in-band metadata track dispatch type
+ // https://html.spec.whatwg.org/multipage/embedded-content.html#steps-to-expose-a-media-resource-specific-text-track
+
+ this.dispatchType = StreamTypes$3.METADATA_STREAM_TYPE.toString(16);
+ if (settings.descriptor) {
+ for (i = 0; i < settings.descriptor.length; i++) {
+ this.dispatchType += ('00' + settings.descriptor[i].toString(16)).slice(-2);
+ }
+ }
+ this.push = function (chunk) {
+ var tag, frameStart, frameSize, frame, i, frameHeader;
+ if (chunk.type !== 'timed-metadata') {
+ return;
+ } // if data_alignment_indicator is set in the PES header,
+ // we must have the start of a new ID3 tag. Assume anything
+ // remaining in the buffer was malformed and throw it out
+
+ if (chunk.dataAlignmentIndicator) {
+ bufferSize = 0;
+ buffer.length = 0;
+ } // ignore events that don't look like ID3 data
+
+ if (buffer.length === 0 && (chunk.data.length < 10 || chunk.data[0] !== 'I'.charCodeAt(0) || chunk.data[1] !== 'D'.charCodeAt(0) || chunk.data[2] !== '3'.charCodeAt(0))) {
+ this.trigger('log', {
+ level: 'warn',
+ message: 'Skipping unrecognized metadata packet'
+ });
+ return;
+ } // add this chunk to the data we've collected so far
+
+ buffer.push(chunk);
+ bufferSize += chunk.data.byteLength; // grab the size of the entire frame from the ID3 header
+
+ if (buffer.length === 1) {
+ // the frame size is transmitted as a 28-bit integer in the
+ // last four bytes of the ID3 header.
+ // The most significant bit of each byte is dropped and the
+ // results concatenated to recover the actual value.
+ tagSize = id3.parseSyncSafeInteger(chunk.data.subarray(6, 10)); // ID3 reports the tag size excluding the header but it's more
+ // convenient for our comparisons to include it
+
+ tagSize += 10;
+ } // if the entire frame has not arrived, wait for more data
+
+ if (bufferSize < tagSize) {
+ return;
+ } // collect the entire frame so it can be parsed
+
+ tag = {
+ data: new Uint8Array(tagSize),
+ frames: [],
+ pts: buffer[0].pts,
+ dts: buffer[0].dts
+ };
+ for (i = 0; i < tagSize;) {
+ tag.data.set(buffer[0].data.subarray(0, tagSize - i), i);
+ i += buffer[0].data.byteLength;
+ bufferSize -= buffer[0].data.byteLength;
+ buffer.shift();
+ } // find the start of the first frame and the end of the tag
+
+ frameStart = 10;
+ if (tag.data[5] & 0x40) {
+ // advance the frame start past the extended header
+ frameStart += 4; // header size field
+
+ frameStart += id3.parseSyncSafeInteger(tag.data.subarray(10, 14)); // clip any padding off the end
+
+ tagSize -= id3.parseSyncSafeInteger(tag.data.subarray(16, 20));
+ } // parse one or more ID3 frames
+ // http://id3.org/id3v2.3.0#ID3v2_frame_overview
+
+ do {
+ // determine the number of bytes in this frame
+ frameSize = id3.parseSyncSafeInteger(tag.data.subarray(frameStart + 4, frameStart + 8));
+ if (frameSize < 1) {
+ this.trigger('log', {
+ level: 'warn',
+ message: 'Malformed ID3 frame encountered. Skipping remaining metadata parsing.'
+ }); // If the frame is malformed, don't parse any further frames but allow previous valid parsed frames
+ // to be sent along.
+
+ break;
+ }
+ frameHeader = String.fromCharCode(tag.data[frameStart], tag.data[frameStart + 1], tag.data[frameStart + 2], tag.data[frameStart + 3]);
+ frame = {
+ id: frameHeader,
+ data: tag.data.subarray(frameStart + 10, frameStart + frameSize + 10)
+ };
+ frame.key = frame.id; // parse frame values
+
+ if (id3.frameParsers[frame.id]) {
+ // use frame specific parser
+ id3.frameParsers[frame.id](frame);
+ } else if (frame.id[0] === 'T') {
+ // use text frame generic parser
+ id3.frameParsers['T*'](frame);
+ } else if (frame.id[0] === 'W') {
+ // use URL link frame generic parser
+ id3.frameParsers['W*'](frame);
+ } // handle the special PRIV frame used to indicate the start
+ // time for raw AAC data
+
+ if (frame.owner === 'com.apple.streaming.transportStreamTimestamp') {
+ var d = frame.data,
+ size = (d[3] & 0x01) << 30 | d[4] << 22 | d[5] << 14 | d[6] << 6 | d[7] >>> 2;
+ size *= 4;
+ size += d[7] & 0x03;
+ frame.timeStamp = size; // in raw AAC, all subsequent data will be timestamped based
+ // on the value of this frame
+ // we couldn't have known the appropriate pts and dts before
+ // parsing this ID3 tag so set those values now
+
+ if (tag.pts === undefined && tag.dts === undefined) {
+ tag.pts = frame.timeStamp;
+ tag.dts = frame.timeStamp;
+ }
+ this.trigger('timestamp', frame);
+ }
+ tag.frames.push(frame);
+ frameStart += 10; // advance past the frame header
+
+ frameStart += frameSize; // advance past the frame body
+ } while (frameStart < tagSize);
+ this.trigger('data', tag);
+ };
+ };
+ MetadataStream.prototype = new Stream$5();
+ var metadataStream = MetadataStream;
+ /**
+ * mux.js
+ *
+ * Copyright (c) Brightcove
+ * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
+ *
+ * A stream-based mp2t to mp4 converter. This utility can be used to
+ * deliver mp4s to a SourceBuffer on platforms that support native
+ * Media Source Extensions.
+ */
+
+ var Stream$4 = stream,
+ CaptionStream$1 = captionStream,
+ StreamTypes$2 = streamTypes,
+ TimestampRolloverStream = timestampRolloverStream.TimestampRolloverStream; // object types
+
+ var TransportPacketStream, TransportParseStream, ElementaryStream; // constants
+
+ var MP2T_PACKET_LENGTH$1 = 188,
+ // bytes
+ SYNC_BYTE$1 = 0x47;
+ /**
+ * Splits an incoming stream of binary data into MPEG-2 Transport
+ * Stream packets.
+ */
+
+ TransportPacketStream = function () {
+ var buffer = new Uint8Array(MP2T_PACKET_LENGTH$1),
+ bytesInBuffer = 0;
+ TransportPacketStream.prototype.init.call(this); // Deliver new bytes to the stream.
+
+ /**
+ * Split a stream of data into M2TS packets
+ **/
+
+ this.push = function (bytes) {
+ var startIndex = 0,
+ endIndex = MP2T_PACKET_LENGTH$1,
+ everything; // If there are bytes remaining from the last segment, prepend them to the
+ // bytes that were pushed in
+
+ if (bytesInBuffer) {
+ everything = new Uint8Array(bytes.byteLength + bytesInBuffer);
+ everything.set(buffer.subarray(0, bytesInBuffer));
+ everything.set(bytes, bytesInBuffer);
+ bytesInBuffer = 0;
+ } else {
+ everything = bytes;
+ } // While we have enough data for a packet
+
+ while (endIndex < everything.byteLength) {
+ // Look for a pair of start and end sync bytes in the data..
+ if (everything[startIndex] === SYNC_BYTE$1 && everything[endIndex] === SYNC_BYTE$1) {
+ // We found a packet so emit it and jump one whole packet forward in
+ // the stream
+ this.trigger('data', everything.subarray(startIndex, endIndex));
+ startIndex += MP2T_PACKET_LENGTH$1;
+ endIndex += MP2T_PACKET_LENGTH$1;
+ continue;
+ } // If we get here, we have somehow become de-synchronized and we need to step
+ // forward one byte at a time until we find a pair of sync bytes that denote
+ // a packet
+
+ startIndex++;
+ endIndex++;
+ } // If there was some data left over at the end of the segment that couldn't
+ // possibly be a whole packet, keep it because it might be the start of a packet
+ // that continues in the next segment
+
+ if (startIndex < everything.byteLength) {
+ buffer.set(everything.subarray(startIndex), 0);
+ bytesInBuffer = everything.byteLength - startIndex;
+ }
+ };
+ /**
+ * Passes identified M2TS packets to the TransportParseStream to be parsed
+ **/
+
+ this.flush = function () {
+ // If the buffer contains a whole packet when we are being flushed, emit it
+ // and empty the buffer. Otherwise hold onto the data because it may be
+ // important for decoding the next segment
+ if (bytesInBuffer === MP2T_PACKET_LENGTH$1 && buffer[0] === SYNC_BYTE$1) {
+ this.trigger('data', buffer);
+ bytesInBuffer = 0;
+ }
+ this.trigger('done');
+ };
+ this.endTimeline = function () {
+ this.flush();
+ this.trigger('endedtimeline');
+ };
+ this.reset = function () {
+ bytesInBuffer = 0;
+ this.trigger('reset');
+ };
+ };
+ TransportPacketStream.prototype = new Stream$4();
+ /**
+ * Accepts an MP2T TransportPacketStream and emits data events with parsed
+ * forms of the individual transport stream packets.
+ */
+
+ TransportParseStream = function () {
+ var parsePsi, parsePat, parsePmt, self;
+ TransportParseStream.prototype.init.call(this);
+ self = this;
+ this.packetsWaitingForPmt = [];
+ this.programMapTable = undefined;
+ parsePsi = function (payload, psi) {
+ var offset = 0; // PSI packets may be split into multiple sections and those
+ // sections may be split into multiple packets. If a PSI
+ // section starts in this packet, the payload_unit_start_indicator
+ // will be true and the first byte of the payload will indicate
+ // the offset from the current position to the start of the
+ // section.
+
+ if (psi.payloadUnitStartIndicator) {
+ offset += payload[offset] + 1;
+ }
+ if (psi.type === 'pat') {
+ parsePat(payload.subarray(offset), psi);
+ } else {
+ parsePmt(payload.subarray(offset), psi);
+ }
+ };
+ parsePat = function (payload, pat) {
+ pat.section_number = payload[7]; // eslint-disable-line camelcase
+
+ pat.last_section_number = payload[8]; // eslint-disable-line camelcase
+ // skip the PSI header and parse the first PMT entry
+
+ self.pmtPid = (payload[10] & 0x1F) << 8 | payload[11];
+ pat.pmtPid = self.pmtPid;
+ };
+ /**
+ * Parse out the relevant fields of a Program Map Table (PMT).
+ * @param payload {Uint8Array} the PMT-specific portion of an MP2T
+ * packet. The first byte in this array should be the table_id
+ * field.
+ * @param pmt {object} the object that should be decorated with
+ * fields parsed from the PMT.
+ */
+
+ parsePmt = function (payload, pmt) {
+ var sectionLength, tableEnd, programInfoLength, offset; // PMTs can be sent ahead of the time when they should actually
+ // take effect. We don't believe this should ever be the case
+ // for HLS but we'll ignore "forward" PMT declarations if we see
+ // them. Future PMT declarations have the current_next_indicator
+ // set to zero.
+
+ if (!(payload[5] & 0x01)) {
+ return;
+ } // overwrite any existing program map table
+
+ self.programMapTable = {
+ video: null,
+ audio: null,
+ 'timed-metadata': {}
+ }; // the mapping table ends at the end of the current section
+
+ sectionLength = (payload[1] & 0x0f) << 8 | payload[2];
+ tableEnd = 3 + sectionLength - 4; // to determine where the table is, we have to figure out how
+ // long the program info descriptors are
+
+ programInfoLength = (payload[10] & 0x0f) << 8 | payload[11]; // advance the offset to the first entry in the mapping table
+
+ offset = 12 + programInfoLength;
+ while (offset < tableEnd) {
+ var streamType = payload[offset];
+ var pid = (payload[offset + 1] & 0x1F) << 8 | payload[offset + 2]; // only map a single elementary_pid for audio and video stream types
+ // TODO: should this be done for metadata too? for now maintain behavior of
+ // multiple metadata streams
+
+ if (streamType === StreamTypes$2.H264_STREAM_TYPE && self.programMapTable.video === null) {
+ self.programMapTable.video = pid;
+ } else if (streamType === StreamTypes$2.ADTS_STREAM_TYPE && self.programMapTable.audio === null) {
+ self.programMapTable.audio = pid;
+ } else if (streamType === StreamTypes$2.METADATA_STREAM_TYPE) {
+ // map pid to stream type for metadata streams
+ self.programMapTable['timed-metadata'][pid] = streamType;
+ } // move to the next table entry
+ // skip past the elementary stream descriptors, if present
+
+ offset += ((payload[offset + 3] & 0x0F) << 8 | payload[offset + 4]) + 5;
+ } // record the map on the packet as well
+
+ pmt.programMapTable = self.programMapTable;
+ };
+ /**
+ * Deliver a new MP2T packet to the next stream in the pipeline.
+ */
+
+ this.push = function (packet) {
+ var result = {},
+ offset = 4;
+ result.payloadUnitStartIndicator = !!(packet[1] & 0x40); // pid is a 13-bit field starting at the last bit of packet[1]
+
+ result.pid = packet[1] & 0x1f;
+ result.pid <<= 8;
+ result.pid |= packet[2]; // if an adaption field is present, its length is specified by the
+ // fifth byte of the TS packet header. The adaptation field is
+ // used to add stuffing to PES packets that don't fill a complete
+ // TS packet, and to specify some forms of timing and control data
+ // that we do not currently use.
+
+ if ((packet[3] & 0x30) >>> 4 > 0x01) {
+ offset += packet[offset] + 1;
+ } // parse the rest of the packet based on the type
+
+ if (result.pid === 0) {
+ result.type = 'pat';
+ parsePsi(packet.subarray(offset), result);
+ this.trigger('data', result);
+ } else if (result.pid === this.pmtPid) {
+ result.type = 'pmt';
+ parsePsi(packet.subarray(offset), result);
+ this.trigger('data', result); // if there are any packets waiting for a PMT to be found, process them now
+
+ while (this.packetsWaitingForPmt.length) {
+ this.processPes_.apply(this, this.packetsWaitingForPmt.shift());
+ }
+ } else if (this.programMapTable === undefined) {
+ // When we have not seen a PMT yet, defer further processing of
+ // PES packets until one has been parsed
+ this.packetsWaitingForPmt.push([packet, offset, result]);
+ } else {
+ this.processPes_(packet, offset, result);
+ }
+ };
+ this.processPes_ = function (packet, offset, result) {
+ // set the appropriate stream type
+ if (result.pid === this.programMapTable.video) {
+ result.streamType = StreamTypes$2.H264_STREAM_TYPE;
+ } else if (result.pid === this.programMapTable.audio) {
+ result.streamType = StreamTypes$2.ADTS_STREAM_TYPE;
+ } else {
+ // if not video or audio, it is timed-metadata or unknown
+ // if unknown, streamType will be undefined
+ result.streamType = this.programMapTable['timed-metadata'][result.pid];
+ }
+ result.type = 'pes';
+ result.data = packet.subarray(offset);
+ this.trigger('data', result);
+ };
+ };
+ TransportParseStream.prototype = new Stream$4();
+ TransportParseStream.STREAM_TYPES = {
+ h264: 0x1b,
+ adts: 0x0f
+ };
+ /**
+ * Reconsistutes program elementary stream (PES) packets from parsed
+ * transport stream packets. That is, if you pipe an
+ * mp2t.TransportParseStream into a mp2t.ElementaryStream, the output
+ * events will be events which capture the bytes for individual PES
+ * packets plus relevant metadata that has been extracted from the
+ * container.
+ */
+
+ ElementaryStream = function () {
+ var self = this,
+ segmentHadPmt = false,
+ // PES packet fragments
+ video = {
+ data: [],
+ size: 0
+ },
+ audio = {
+ data: [],
+ size: 0
+ },
+ timedMetadata = {
+ data: [],
+ size: 0
+ },
+ programMapTable,
+ parsePes = function (payload, pes) {
+ var ptsDtsFlags;
+ const startPrefix = payload[0] << 16 | payload[1] << 8 | payload[2]; // default to an empty array
+
+ pes.data = new Uint8Array(); // In certain live streams, the start of a TS fragment has ts packets
+ // that are frame data that is continuing from the previous fragment. This
+ // is to check that the pes data is the start of a new pes payload
+
+ if (startPrefix !== 1) {
+ return;
+ } // get the packet length, this will be 0 for video
+
+ pes.packetLength = 6 + (payload[4] << 8 | payload[5]); // find out if this packets starts a new keyframe
+
+ pes.dataAlignmentIndicator = (payload[6] & 0x04) !== 0; // PES packets may be annotated with a PTS value, or a PTS value
+ // and a DTS value. Determine what combination of values is
+ // available to work with.
+
+ ptsDtsFlags = payload[7]; // PTS and DTS are normally stored as a 33-bit number. Javascript
+ // performs all bitwise operations on 32-bit integers but javascript
+ // supports a much greater range (52-bits) of integer using standard
+ // mathematical operations.
+ // We construct a 31-bit value using bitwise operators over the 31
+ // most significant bits and then multiply by 4 (equal to a left-shift
+ // of 2) before we add the final 2 least significant bits of the
+ // timestamp (equal to an OR.)
+
+ if (ptsDtsFlags & 0xC0) {
+ // the PTS and DTS are not written out directly. For information
+ // on how they are encoded, see
+ // http://dvd.sourceforge.net/dvdinfo/pes-hdr.html
+ pes.pts = (payload[9] & 0x0E) << 27 | (payload[10] & 0xFF) << 20 | (payload[11] & 0xFE) << 12 | (payload[12] & 0xFF) << 5 | (payload[13] & 0xFE) >>> 3;
+ pes.pts *= 4; // Left shift by 2
+
+ pes.pts += (payload[13] & 0x06) >>> 1; // OR by the two LSBs
+
+ pes.dts = pes.pts;
+ if (ptsDtsFlags & 0x40) {
+ pes.dts = (payload[14] & 0x0E) << 27 | (payload[15] & 0xFF) << 20 | (payload[16] & 0xFE) << 12 | (payload[17] & 0xFF) << 5 | (payload[18] & 0xFE) >>> 3;
+ pes.dts *= 4; // Left shift by 2
+
+ pes.dts += (payload[18] & 0x06) >>> 1; // OR by the two LSBs
+ }
+ } // the data section starts immediately after the PES header.
+ // pes_header_data_length specifies the number of header bytes
+ // that follow the last byte of the field.
+
+ pes.data = payload.subarray(9 + payload[8]);
+ },
+ /**
+ * Pass completely parsed PES packets to the next stream in the pipeline
+ **/
+ flushStream = function (stream, type, forceFlush) {
+ var packetData = new Uint8Array(stream.size),
+ event = {
+ type: type
+ },
+ i = 0,
+ offset = 0,
+ packetFlushable = false,
+ fragment; // do nothing if there is not enough buffered data for a complete
+ // PES header
+
+ if (!stream.data.length || stream.size < 9) {
+ return;
+ }
+ event.trackId = stream.data[0].pid; // reassemble the packet
+
+ for (i = 0; i < stream.data.length; i++) {
+ fragment = stream.data[i];
+ packetData.set(fragment.data, offset);
+ offset += fragment.data.byteLength;
+ } // parse assembled packet's PES header
+
+ parsePes(packetData, event); // non-video PES packets MUST have a non-zero PES_packet_length
+ // check that there is enough stream data to fill the packet
+
+ packetFlushable = type === 'video' || event.packetLength <= stream.size; // flush pending packets if the conditions are right
+
+ if (forceFlush || packetFlushable) {
+ stream.size = 0;
+ stream.data.length = 0;
+ } // only emit packets that are complete. this is to avoid assembling
+ // incomplete PES packets due to poor segmentation
+
+ if (packetFlushable) {
+ self.trigger('data', event);
+ }
+ };
+ ElementaryStream.prototype.init.call(this);
+ /**
+ * Identifies M2TS packet types and parses PES packets using metadata
+ * parsed from the PMT
+ **/
+
+ this.push = function (data) {
+ ({
+ pat: function () {// we have to wait for the PMT to arrive as well before we
+ // have any meaningful metadata
+ },
+ pes: function () {
+ var stream, streamType;
+ switch (data.streamType) {
+ case StreamTypes$2.H264_STREAM_TYPE:
+ stream = video;
+ streamType = 'video';
+ break;
+ case StreamTypes$2.ADTS_STREAM_TYPE:
+ stream = audio;
+ streamType = 'audio';
+ break;
+ case StreamTypes$2.METADATA_STREAM_TYPE:
+ stream = timedMetadata;
+ streamType = 'timed-metadata';
+ break;
+ default:
+ // ignore unknown stream types
+ return;
+ } // if a new packet is starting, we can flush the completed
+ // packet
+
+ if (data.payloadUnitStartIndicator) {
+ flushStream(stream, streamType, true);
+ } // buffer this fragment until we are sure we've received the
+ // complete payload
+
+ stream.data.push(data);
+ stream.size += data.data.byteLength;
+ },
+ pmt: function () {
+ var event = {
+ type: 'metadata',
+ tracks: []
+ };
+ programMapTable = data.programMapTable; // translate audio and video streams to tracks
+
+ if (programMapTable.video !== null) {
+ event.tracks.push({
+ timelineStartInfo: {
+ baseMediaDecodeTime: 0
+ },
+ id: +programMapTable.video,
+ codec: 'avc',
+ type: 'video'
+ });
+ }
+ if (programMapTable.audio !== null) {
+ event.tracks.push({
+ timelineStartInfo: {
+ baseMediaDecodeTime: 0
+ },
+ id: +programMapTable.audio,
+ codec: 'adts',
+ type: 'audio'
+ });
+ }
+ segmentHadPmt = true;
+ self.trigger('data', event);
+ }
+ })[data.type]();
+ };
+ this.reset = function () {
+ video.size = 0;
+ video.data.length = 0;
+ audio.size = 0;
+ audio.data.length = 0;
+ this.trigger('reset');
+ };
+ /**
+ * Flush any remaining input. Video PES packets may be of variable
+ * length. Normally, the start of a new video packet can trigger the
+ * finalization of the previous packet. That is not possible if no
+ * more video is forthcoming, however. In that case, some other
+ * mechanism (like the end of the file) has to be employed. When it is
+ * clear that no additional data is forthcoming, calling this method
+ * will flush the buffered packets.
+ */
+
+ this.flushStreams_ = function () {
+ // !!THIS ORDER IS IMPORTANT!!
+ // video first then audio
+ flushStream(video, 'video');
+ flushStream(audio, 'audio');
+ flushStream(timedMetadata, 'timed-metadata');
+ };
+ this.flush = function () {
+ // if on flush we haven't had a pmt emitted
+ // and we have a pmt to emit. emit the pmt
+ // so that we trigger a trackinfo downstream.
+ if (!segmentHadPmt && programMapTable) {
+ var pmt = {
+ type: 'metadata',
+ tracks: []
+ }; // translate audio and video streams to tracks
+
+ if (programMapTable.video !== null) {
+ pmt.tracks.push({
+ timelineStartInfo: {
+ baseMediaDecodeTime: 0
+ },
+ id: +programMapTable.video,
+ codec: 'avc',
+ type: 'video'
+ });
+ }
+ if (programMapTable.audio !== null) {
+ pmt.tracks.push({
+ timelineStartInfo: {
+ baseMediaDecodeTime: 0
+ },
+ id: +programMapTable.audio,
+ codec: 'adts',
+ type: 'audio'
+ });
+ }
+ self.trigger('data', pmt);
+ }
+ segmentHadPmt = false;
+ this.flushStreams_();
+ this.trigger('done');
+ };
+ };
+ ElementaryStream.prototype = new Stream$4();
+ var m2ts$1 = {
+ PAT_PID: 0x0000,
+ MP2T_PACKET_LENGTH: MP2T_PACKET_LENGTH$1,
+ TransportPacketStream: TransportPacketStream,
+ TransportParseStream: TransportParseStream,
+ ElementaryStream: ElementaryStream,
+ TimestampRolloverStream: TimestampRolloverStream,
+ CaptionStream: CaptionStream$1.CaptionStream,
+ Cea608Stream: CaptionStream$1.Cea608Stream,
+ Cea708Stream: CaptionStream$1.Cea708Stream,
+ MetadataStream: metadataStream
+ };
+ for (var type in StreamTypes$2) {
+ if (StreamTypes$2.hasOwnProperty(type)) {
+ m2ts$1[type] = StreamTypes$2[type];
+ }
+ }
+ var m2ts_1 = m2ts$1;
+ /**
+ * mux.js
+ *
+ * Copyright (c) Brightcove
+ * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
+ */
+
+ var Stream$3 = stream;
+ var ONE_SECOND_IN_TS$2 = clock$2.ONE_SECOND_IN_TS;
+ var AdtsStream$1;
+ var ADTS_SAMPLING_FREQUENCIES$1 = [96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000, 7350];
+ /*
+ * Accepts a ElementaryStream and emits data events with parsed
+ * AAC Audio Frames of the individual packets. Input audio in ADTS
+ * format is unpacked and re-emitted as AAC frames.
+ *
+ * @see http://wiki.multimedia.cx/index.php?title=ADTS
+ * @see http://wiki.multimedia.cx/?title=Understanding_AAC
+ */
+
+ AdtsStream$1 = function (handlePartialSegments) {
+ var buffer,
+ frameNum = 0;
+ AdtsStream$1.prototype.init.call(this);
+ this.skipWarn_ = function (start, end) {
+ this.trigger('log', {
+ level: 'warn',
+ message: `adts skiping bytes ${start} to ${end} in frame ${frameNum} outside syncword`
+ });
+ };
+ this.push = function (packet) {
+ var i = 0,
+ frameLength,
+ protectionSkipBytes,
+ oldBuffer,
+ sampleCount,
+ adtsFrameDuration;
+ if (!handlePartialSegments) {
+ frameNum = 0;
+ }
+ if (packet.type !== 'audio') {
+ // ignore non-audio data
+ return;
+ } // Prepend any data in the buffer to the input data so that we can parse
+ // aac frames the cross a PES packet boundary
+
+ if (buffer && buffer.length) {
+ oldBuffer = buffer;
+ buffer = new Uint8Array(oldBuffer.byteLength + packet.data.byteLength);
+ buffer.set(oldBuffer);
+ buffer.set(packet.data, oldBuffer.byteLength);
+ } else {
+ buffer = packet.data;
+ } // unpack any ADTS frames which have been fully received
+ // for details on the ADTS header, see http://wiki.multimedia.cx/index.php?title=ADTS
+
+ var skip; // We use i + 7 here because we want to be able to parse the entire header.
+ // If we don't have enough bytes to do that, then we definitely won't have a full frame.
+
+ while (i + 7 < buffer.length) {
+ // Look for the start of an ADTS header..
+ if (buffer[i] !== 0xFF || (buffer[i + 1] & 0xF6) !== 0xF0) {
+ if (typeof skip !== 'number') {
+ skip = i;
+ } // If a valid header was not found, jump one forward and attempt to
+ // find a valid ADTS header starting at the next byte
+
+ i++;
+ continue;
+ }
+ if (typeof skip === 'number') {
+ this.skipWarn_(skip, i);
+ skip = null;
+ } // The protection skip bit tells us if we have 2 bytes of CRC data at the
+ // end of the ADTS header
+
+ protectionSkipBytes = (~buffer[i + 1] & 0x01) * 2; // Frame length is a 13 bit integer starting 16 bits from the
+ // end of the sync sequence
+ // NOTE: frame length includes the size of the header
+
+ frameLength = (buffer[i + 3] & 0x03) << 11 | buffer[i + 4] << 3 | (buffer[i + 5] & 0xe0) >> 5;
+ sampleCount = ((buffer[i + 6] & 0x03) + 1) * 1024;
+ adtsFrameDuration = sampleCount * ONE_SECOND_IN_TS$2 / ADTS_SAMPLING_FREQUENCIES$1[(buffer[i + 2] & 0x3c) >>> 2]; // If we don't have enough data to actually finish this ADTS frame,
+ // then we have to wait for more data
+
+ if (buffer.byteLength - i < frameLength) {
+ break;
+ } // Otherwise, deliver the complete AAC frame
+
+ this.trigger('data', {
+ pts: packet.pts + frameNum * adtsFrameDuration,
+ dts: packet.dts + frameNum * adtsFrameDuration,
+ sampleCount: sampleCount,
+ audioobjecttype: (buffer[i + 2] >>> 6 & 0x03) + 1,
+ channelcount: (buffer[i + 2] & 1) << 2 | (buffer[i + 3] & 0xc0) >>> 6,
+ samplerate: ADTS_SAMPLING_FREQUENCIES$1[(buffer[i + 2] & 0x3c) >>> 2],
+ samplingfrequencyindex: (buffer[i + 2] & 0x3c) >>> 2,
+ // assume ISO/IEC 14496-12 AudioSampleEntry default of 16
+ samplesize: 16,
+ // data is the frame without it's header
+ data: buffer.subarray(i + 7 + protectionSkipBytes, i + frameLength)
+ });
+ frameNum++;
+ i += frameLength;
+ }
+ if (typeof skip === 'number') {
+ this.skipWarn_(skip, i);
+ skip = null;
+ } // remove processed bytes from the buffer.
+
+ buffer = buffer.subarray(i);
+ };
+ this.flush = function () {
+ frameNum = 0;
+ this.trigger('done');
+ };
+ this.reset = function () {
+ buffer = void 0;
+ this.trigger('reset');
+ };
+ this.endTimeline = function () {
+ buffer = void 0;
+ this.trigger('endedtimeline');
+ };
+ };
+ AdtsStream$1.prototype = new Stream$3();
+ var adts = AdtsStream$1;
+ /**
+ * mux.js
+ *
+ * Copyright (c) Brightcove
+ * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
+ */
+
+ var ExpGolomb$1;
+ /**
+ * Parser for exponential Golomb codes, a variable-bitwidth number encoding
+ * scheme used by h264.
+ */
+
+ ExpGolomb$1 = function (workingData) {
+ var
+ // the number of bytes left to examine in workingData
+ workingBytesAvailable = workingData.byteLength,
+ // the current word being examined
+ workingWord = 0,
+ // :uint
+ // the number of bits left to examine in the current word
+ workingBitsAvailable = 0; // :uint;
+ // ():uint
+
+ this.length = function () {
+ return 8 * workingBytesAvailable;
+ }; // ():uint
+
+ this.bitsAvailable = function () {
+ return 8 * workingBytesAvailable + workingBitsAvailable;
+ }; // ():void
+
+ this.loadWord = function () {
+ var position = workingData.byteLength - workingBytesAvailable,
+ workingBytes = new Uint8Array(4),
+ availableBytes = Math.min(4, workingBytesAvailable);
+ if (availableBytes === 0) {
+ throw new Error('no bytes available');
+ }
+ workingBytes.set(workingData.subarray(position, position + availableBytes));
+ workingWord = new DataView(workingBytes.buffer).getUint32(0); // track the amount of workingData that has been processed
+
+ workingBitsAvailable = availableBytes * 8;
+ workingBytesAvailable -= availableBytes;
+ }; // (count:int):void
+
+ this.skipBits = function (count) {
+ var skipBytes; // :int
+
+ if (workingBitsAvailable > count) {
+ workingWord <<= count;
+ workingBitsAvailable -= count;
+ } else {
+ count -= workingBitsAvailable;
+ skipBytes = Math.floor(count / 8);
+ count -= skipBytes * 8;
+ workingBytesAvailable -= skipBytes;
+ this.loadWord();
+ workingWord <<= count;
+ workingBitsAvailable -= count;
+ }
+ }; // (size:int):uint
+
+ this.readBits = function (size) {
+ var bits = Math.min(workingBitsAvailable, size),
+ // :uint
+ valu = workingWord >>> 32 - bits; // :uint
+ // if size > 31, handle error
+
+ workingBitsAvailable -= bits;
+ if (workingBitsAvailable > 0) {
+ workingWord <<= bits;
+ } else if (workingBytesAvailable > 0) {
+ this.loadWord();
+ }
+ bits = size - bits;
+ if (bits > 0) {
+ return valu << bits | this.readBits(bits);
+ }
+ return valu;
+ }; // ():uint
+
+ this.skipLeadingZeros = function () {
+ var leadingZeroCount; // :uint
+
+ for (leadingZeroCount = 0; leadingZeroCount < workingBitsAvailable; ++leadingZeroCount) {
+ if ((workingWord & 0x80000000 >>> leadingZeroCount) !== 0) {
+ // the first bit of working word is 1
+ workingWord <<= leadingZeroCount;
+ workingBitsAvailable -= leadingZeroCount;
+ return leadingZeroCount;
+ }
+ } // we exhausted workingWord and still have not found a 1
+
+ this.loadWord();
+ return leadingZeroCount + this.skipLeadingZeros();
+ }; // ():void
+
+ this.skipUnsignedExpGolomb = function () {
+ this.skipBits(1 + this.skipLeadingZeros());
+ }; // ():void
+
+ this.skipExpGolomb = function () {
+ this.skipBits(1 + this.skipLeadingZeros());
+ }; // ():uint
+
+ this.readUnsignedExpGolomb = function () {
+ var clz = this.skipLeadingZeros(); // :uint
+
+ return this.readBits(clz + 1) - 1;
+ }; // ():int
+
+ this.readExpGolomb = function () {
+ var valu = this.readUnsignedExpGolomb(); // :int
+
+ if (0x01 & valu) {
+ // the number is odd if the low order bit is set
+ return 1 + valu >>> 1; // add 1 to make it even, and divide by 2
+ }
+
+ return -1 * (valu >>> 1); // divide by two then make it negative
+ }; // Some convenience functions
+ // :Boolean
+
+ this.readBoolean = function () {
+ return this.readBits(1) === 1;
+ }; // ():int
+
+ this.readUnsignedByte = function () {
+ return this.readBits(8);
+ };
+ this.loadWord();
+ };
+ var expGolomb = ExpGolomb$1;
+ /**
+ * mux.js
+ *
+ * Copyright (c) Brightcove
+ * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
+ */
+
+ var Stream$2 = stream;
+ var ExpGolomb = expGolomb;
+ var H264Stream$1, NalByteStream;
+ var PROFILES_WITH_OPTIONAL_SPS_DATA;
+ /**
+ * Accepts a NAL unit byte stream and unpacks the embedded NAL units.
+ */
+
+ NalByteStream = function () {
+ var syncPoint = 0,
+ i,
+ buffer;
+ NalByteStream.prototype.init.call(this);
+ /*
+ * Scans a byte stream and triggers a data event with the NAL units found.
+ * @param {Object} data Event received from H264Stream
+ * @param {Uint8Array} data.data The h264 byte stream to be scanned
+ *
+ * @see H264Stream.push
+ */
+
+ this.push = function (data) {
+ var swapBuffer;
+ if (!buffer) {
+ buffer = data.data;
+ } else {
+ swapBuffer = new Uint8Array(buffer.byteLength + data.data.byteLength);
+ swapBuffer.set(buffer);
+ swapBuffer.set(data.data, buffer.byteLength);
+ buffer = swapBuffer;
+ }
+ var len = buffer.byteLength; // Rec. ITU-T H.264, Annex B
+ // scan for NAL unit boundaries
+ // a match looks like this:
+ // 0 0 1 .. NAL .. 0 0 1
+ // ^ sync point ^ i
+ // or this:
+ // 0 0 1 .. NAL .. 0 0 0
+ // ^ sync point ^ i
+ // advance the sync point to a NAL start, if necessary
+
+ for (; syncPoint < len - 3; syncPoint++) {
+ if (buffer[syncPoint + 2] === 1) {
+ // the sync point is properly aligned
+ i = syncPoint + 5;
+ break;
+ }
+ }
+ while (i < len) {
+ // look at the current byte to determine if we've hit the end of
+ // a NAL unit boundary
+ switch (buffer[i]) {
+ case 0:
+ // skip past non-sync sequences
+ if (buffer[i - 1] !== 0) {
+ i += 2;
+ break;
+ } else if (buffer[i - 2] !== 0) {
+ i++;
+ break;
+ } // deliver the NAL unit if it isn't empty
+
+ if (syncPoint + 3 !== i - 2) {
+ this.trigger('data', buffer.subarray(syncPoint + 3, i - 2));
+ } // drop trailing zeroes
+
+ do {
+ i++;
+ } while (buffer[i] !== 1 && i < len);
+ syncPoint = i - 2;
+ i += 3;
+ break;
+ case 1:
+ // skip past non-sync sequences
+ if (buffer[i - 1] !== 0 || buffer[i - 2] !== 0) {
+ i += 3;
+ break;
+ } // deliver the NAL unit
+
+ this.trigger('data', buffer.subarray(syncPoint + 3, i - 2));
+ syncPoint = i - 2;
+ i += 3;
+ break;
+ default:
+ // the current byte isn't a one or zero, so it cannot be part
+ // of a sync sequence
+ i += 3;
+ break;
+ }
+ } // filter out the NAL units that were delivered
+
+ buffer = buffer.subarray(syncPoint);
+ i -= syncPoint;
+ syncPoint = 0;
+ };
+ this.reset = function () {
+ buffer = null;
+ syncPoint = 0;
+ this.trigger('reset');
+ };
+ this.flush = function () {
+ // deliver the last buffered NAL unit
+ if (buffer && buffer.byteLength > 3) {
+ this.trigger('data', buffer.subarray(syncPoint + 3));
+ } // reset the stream state
+
+ buffer = null;
+ syncPoint = 0;
+ this.trigger('done');
+ };
+ this.endTimeline = function () {
+ this.flush();
+ this.trigger('endedtimeline');
+ };
+ };
+ NalByteStream.prototype = new Stream$2(); // values of profile_idc that indicate additional fields are included in the SPS
+ // see Recommendation ITU-T H.264 (4/2013),
+ // 7.3.2.1.1 Sequence parameter set data syntax
+
+ PROFILES_WITH_OPTIONAL_SPS_DATA = {
+ 100: true,
+ 110: true,
+ 122: true,
+ 244: true,
+ 44: true,
+ 83: true,
+ 86: true,
+ 118: true,
+ 128: true,
+ // TODO: the three profiles below don't
+ // appear to have sps data in the specificiation anymore?
+ 138: true,
+ 139: true,
+ 134: true
+ };
+ /**
+ * Accepts input from a ElementaryStream and produces H.264 NAL unit data
+ * events.
+ */
+
+ H264Stream$1 = function () {
+ var nalByteStream = new NalByteStream(),
+ self,
+ trackId,
+ currentPts,
+ currentDts,
+ discardEmulationPreventionBytes,
+ readSequenceParameterSet,
+ skipScalingList;
+ H264Stream$1.prototype.init.call(this);
+ self = this;
+ /*
+ * Pushes a packet from a stream onto the NalByteStream
+ *
+ * @param {Object} packet - A packet received from a stream
+ * @param {Uint8Array} packet.data - The raw bytes of the packet
+ * @param {Number} packet.dts - Decode timestamp of the packet
+ * @param {Number} packet.pts - Presentation timestamp of the packet
+ * @param {Number} packet.trackId - The id of the h264 track this packet came from
+ * @param {('video'|'audio')} packet.type - The type of packet
+ *
+ */
+
+ this.push = function (packet) {
+ if (packet.type !== 'video') {
+ return;
+ }
+ trackId = packet.trackId;
+ currentPts = packet.pts;
+ currentDts = packet.dts;
+ nalByteStream.push(packet);
+ };
+ /*
+ * Identify NAL unit types and pass on the NALU, trackId, presentation and decode timestamps
+ * for the NALUs to the next stream component.
+ * Also, preprocess caption and sequence parameter NALUs.
+ *
+ * @param {Uint8Array} data - A NAL unit identified by `NalByteStream.push`
+ * @see NalByteStream.push
+ */
+
+ nalByteStream.on('data', function (data) {
+ var event = {
+ trackId: trackId,
+ pts: currentPts,
+ dts: currentDts,
+ data: data,
+ nalUnitTypeCode: data[0] & 0x1f
+ };
+ switch (event.nalUnitTypeCode) {
+ case 0x05:
+ event.nalUnitType = 'slice_layer_without_partitioning_rbsp_idr';
+ break;
+ case 0x06:
+ event.nalUnitType = 'sei_rbsp';
+ event.escapedRBSP = discardEmulationPreventionBytes(data.subarray(1));
+ break;
+ case 0x07:
+ event.nalUnitType = 'seq_parameter_set_rbsp';
+ event.escapedRBSP = discardEmulationPreventionBytes(data.subarray(1));
+ event.config = readSequenceParameterSet(event.escapedRBSP);
+ break;
+ case 0x08:
+ event.nalUnitType = 'pic_parameter_set_rbsp';
+ break;
+ case 0x09:
+ event.nalUnitType = 'access_unit_delimiter_rbsp';
+ break;
+ } // This triggers data on the H264Stream
+
+ self.trigger('data', event);
+ });
+ nalByteStream.on('done', function () {
+ self.trigger('done');
+ });
+ nalByteStream.on('partialdone', function () {
+ self.trigger('partialdone');
+ });
+ nalByteStream.on('reset', function () {
+ self.trigger('reset');
+ });
+ nalByteStream.on('endedtimeline', function () {
+ self.trigger('endedtimeline');
+ });
+ this.flush = function () {
+ nalByteStream.flush();
+ };
+ this.partialFlush = function () {
+ nalByteStream.partialFlush();
+ };
+ this.reset = function () {
+ nalByteStream.reset();
+ };
+ this.endTimeline = function () {
+ nalByteStream.endTimeline();
+ };
+ /**
+ * Advance the ExpGolomb decoder past a scaling list. The scaling
+ * list is optionally transmitted as part of a sequence parameter
+ * set and is not relevant to transmuxing.
+ * @param count {number} the number of entries in this scaling list
+ * @param expGolombDecoder {object} an ExpGolomb pointed to the
+ * start of a scaling list
+ * @see Recommendation ITU-T H.264, Section 7.3.2.1.1.1
+ */
+
+ skipScalingList = function (count, expGolombDecoder) {
+ var lastScale = 8,
+ nextScale = 8,
+ j,
+ deltaScale;
+ for (j = 0; j < count; j++) {
+ if (nextScale !== 0) {
+ deltaScale = expGolombDecoder.readExpGolomb();
+ nextScale = (lastScale + deltaScale + 256) % 256;
+ }
+ lastScale = nextScale === 0 ? lastScale : nextScale;
+ }
+ };
+ /**
+ * Expunge any "Emulation Prevention" bytes from a "Raw Byte
+ * Sequence Payload"
+ * @param data {Uint8Array} the bytes of a RBSP from a NAL
+ * unit
+ * @return {Uint8Array} the RBSP without any Emulation
+ * Prevention Bytes
+ */
+
+ discardEmulationPreventionBytes = function (data) {
+ var length = data.byteLength,
+ emulationPreventionBytesPositions = [],
+ i = 1,
+ newLength,
+ newData; // Find all `Emulation Prevention Bytes`
+
+ while (i < length - 2) {
+ if (data[i] === 0 && data[i + 1] === 0 && data[i + 2] === 0x03) {
+ emulationPreventionBytesPositions.push(i + 2);
+ i += 2;
+ } else {
+ i++;
+ }
+ } // If no Emulation Prevention Bytes were found just return the original
+ // array
+
+ if (emulationPreventionBytesPositions.length === 0) {
+ return data;
+ } // Create a new array to hold the NAL unit data
+
+ newLength = length - emulationPreventionBytesPositions.length;
+ newData = new Uint8Array(newLength);
+ var sourceIndex = 0;
+ for (i = 0; i < newLength; sourceIndex++, i++) {
+ if (sourceIndex === emulationPreventionBytesPositions[0]) {
+ // Skip this byte
+ sourceIndex++; // Remove this position index
+
+ emulationPreventionBytesPositions.shift();
+ }
+ newData[i] = data[sourceIndex];
+ }
+ return newData;
+ };
+ /**
+ * Read a sequence parameter set and return some interesting video
+ * properties. A sequence parameter set is the H264 metadata that
+ * describes the properties of upcoming video frames.
+ * @param data {Uint8Array} the bytes of a sequence parameter set
+ * @return {object} an object with configuration parsed from the
+ * sequence parameter set, including the dimensions of the
+ * associated video frames.
+ */
+
+ readSequenceParameterSet = function (data) {
+ var frameCropLeftOffset = 0,
+ frameCropRightOffset = 0,
+ frameCropTopOffset = 0,
+ frameCropBottomOffset = 0,
+ expGolombDecoder,
+ profileIdc,
+ levelIdc,
+ profileCompatibility,
+ chromaFormatIdc,
+ picOrderCntType,
+ numRefFramesInPicOrderCntCycle,
+ picWidthInMbsMinus1,
+ picHeightInMapUnitsMinus1,
+ frameMbsOnlyFlag,
+ scalingListCount,
+ sarRatio = [1, 1],
+ aspectRatioIdc,
+ i;
+ expGolombDecoder = new ExpGolomb(data);
+ profileIdc = expGolombDecoder.readUnsignedByte(); // profile_idc
+
+ profileCompatibility = expGolombDecoder.readUnsignedByte(); // constraint_set[0-5]_flag
+
+ levelIdc = expGolombDecoder.readUnsignedByte(); // level_idc u(8)
+
+ expGolombDecoder.skipUnsignedExpGolomb(); // seq_parameter_set_id
+ // some profiles have more optional data we don't need
+
+ if (PROFILES_WITH_OPTIONAL_SPS_DATA[profileIdc]) {
+ chromaFormatIdc = expGolombDecoder.readUnsignedExpGolomb();
+ if (chromaFormatIdc === 3) {
+ expGolombDecoder.skipBits(1); // separate_colour_plane_flag
+ }
+
+ expGolombDecoder.skipUnsignedExpGolomb(); // bit_depth_luma_minus8
+
+ expGolombDecoder.skipUnsignedExpGolomb(); // bit_depth_chroma_minus8
+
+ expGolombDecoder.skipBits(1); // qpprime_y_zero_transform_bypass_flag
+
+ if (expGolombDecoder.readBoolean()) {
+ // seq_scaling_matrix_present_flag
+ scalingListCount = chromaFormatIdc !== 3 ? 8 : 12;
+ for (i = 0; i < scalingListCount; i++) {
+ if (expGolombDecoder.readBoolean()) {
+ // seq_scaling_list_present_flag[ i ]
+ if (i < 6) {
+ skipScalingList(16, expGolombDecoder);
+ } else {
+ skipScalingList(64, expGolombDecoder);
+ }
+ }
+ }
+ }
+ }
+ expGolombDecoder.skipUnsignedExpGolomb(); // log2_max_frame_num_minus4
+
+ picOrderCntType = expGolombDecoder.readUnsignedExpGolomb();
+ if (picOrderCntType === 0) {
+ expGolombDecoder.readUnsignedExpGolomb(); // log2_max_pic_order_cnt_lsb_minus4
+ } else if (picOrderCntType === 1) {
+ expGolombDecoder.skipBits(1); // delta_pic_order_always_zero_flag
+
+ expGolombDecoder.skipExpGolomb(); // offset_for_non_ref_pic
+
+ expGolombDecoder.skipExpGolomb(); // offset_for_top_to_bottom_field
+
+ numRefFramesInPicOrderCntCycle = expGolombDecoder.readUnsignedExpGolomb();
+ for (i = 0; i < numRefFramesInPicOrderCntCycle; i++) {
+ expGolombDecoder.skipExpGolomb(); // offset_for_ref_frame[ i ]
+ }
+ }
+
+ expGolombDecoder.skipUnsignedExpGolomb(); // max_num_ref_frames
+
+ expGolombDecoder.skipBits(1); // gaps_in_frame_num_value_allowed_flag
+
+ picWidthInMbsMinus1 = expGolombDecoder.readUnsignedExpGolomb();
+ picHeightInMapUnitsMinus1 = expGolombDecoder.readUnsignedExpGolomb();
+ frameMbsOnlyFlag = expGolombDecoder.readBits(1);
+ if (frameMbsOnlyFlag === 0) {
+ expGolombDecoder.skipBits(1); // mb_adaptive_frame_field_flag
+ }
+
+ expGolombDecoder.skipBits(1); // direct_8x8_inference_flag
+
+ if (expGolombDecoder.readBoolean()) {
+ // frame_cropping_flag
+ frameCropLeftOffset = expGolombDecoder.readUnsignedExpGolomb();
+ frameCropRightOffset = expGolombDecoder.readUnsignedExpGolomb();
+ frameCropTopOffset = expGolombDecoder.readUnsignedExpGolomb();
+ frameCropBottomOffset = expGolombDecoder.readUnsignedExpGolomb();
+ }
+ if (expGolombDecoder.readBoolean()) {
+ // vui_parameters_present_flag
+ if (expGolombDecoder.readBoolean()) {
+ // aspect_ratio_info_present_flag
+ aspectRatioIdc = expGolombDecoder.readUnsignedByte();
+ switch (aspectRatioIdc) {
+ case 1:
+ sarRatio = [1, 1];
+ break;
+ case 2:
+ sarRatio = [12, 11];
+ break;
+ case 3:
+ sarRatio = [10, 11];
+ break;
+ case 4:
+ sarRatio = [16, 11];
+ break;
+ case 5:
+ sarRatio = [40, 33];
+ break;
+ case 6:
+ sarRatio = [24, 11];
+ break;
+ case 7:
+ sarRatio = [20, 11];
+ break;
+ case 8:
+ sarRatio = [32, 11];
+ break;
+ case 9:
+ sarRatio = [80, 33];
+ break;
+ case 10:
+ sarRatio = [18, 11];
+ break;
+ case 11:
+ sarRatio = [15, 11];
+ break;
+ case 12:
+ sarRatio = [64, 33];
+ break;
+ case 13:
+ sarRatio = [160, 99];
+ break;
+ case 14:
+ sarRatio = [4, 3];
+ break;
+ case 15:
+ sarRatio = [3, 2];
+ break;
+ case 16:
+ sarRatio = [2, 1];
+ break;
+ case 255:
+ {
+ sarRatio = [expGolombDecoder.readUnsignedByte() << 8 | expGolombDecoder.readUnsignedByte(), expGolombDecoder.readUnsignedByte() << 8 | expGolombDecoder.readUnsignedByte()];
+ break;
+ }
+ }
+ if (sarRatio) {
+ sarRatio[0] / sarRatio[1];
+ }
+ }
+ }
+ return {
+ profileIdc: profileIdc,
+ levelIdc: levelIdc,
+ profileCompatibility: profileCompatibility,
+ width: (picWidthInMbsMinus1 + 1) * 16 - frameCropLeftOffset * 2 - frameCropRightOffset * 2,
+ height: (2 - frameMbsOnlyFlag) * (picHeightInMapUnitsMinus1 + 1) * 16 - frameCropTopOffset * 2 - frameCropBottomOffset * 2,
+ // sar is sample aspect ratio
+ sarRatio: sarRatio
+ };
+ };
+ };
+ H264Stream$1.prototype = new Stream$2();
+ var h264 = {
+ H264Stream: H264Stream$1,
+ NalByteStream: NalByteStream
+ };
+ /**
+ * mux.js
+ *
+ * Copyright (c) Brightcove
+ * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
+ *
+ * Utilities to detect basic properties and metadata about Aac data.
+ */
+
+ var ADTS_SAMPLING_FREQUENCIES = [96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000, 7350];
+ var parseId3TagSize = function (header, byteIndex) {
+ var returnSize = header[byteIndex + 6] << 21 | header[byteIndex + 7] << 14 | header[byteIndex + 8] << 7 | header[byteIndex + 9],
+ flags = header[byteIndex + 5],
+ footerPresent = (flags & 16) >> 4; // if we get a negative returnSize clamp it to 0
+
+ returnSize = returnSize >= 0 ? returnSize : 0;
+ if (footerPresent) {
+ return returnSize + 20;
+ }
+ return returnSize + 10;
+ };
+ var getId3Offset = function (data, offset) {
+ if (data.length - offset < 10 || data[offset] !== 'I'.charCodeAt(0) || data[offset + 1] !== 'D'.charCodeAt(0) || data[offset + 2] !== '3'.charCodeAt(0)) {
+ return offset;
+ }
+ offset += parseId3TagSize(data, offset);
+ return getId3Offset(data, offset);
+ }; // TODO: use vhs-utils
+
+ var isLikelyAacData$1 = function (data) {
+ var offset = getId3Offset(data, 0);
+ return data.length >= offset + 2 && (data[offset] & 0xFF) === 0xFF && (data[offset + 1] & 0xF0) === 0xF0 &&
+ // verify that the 2 layer bits are 0, aka this
+ // is not mp3 data but aac data.
+ (data[offset + 1] & 0x16) === 0x10;
+ };
+ var parseSyncSafeInteger = function (data) {
+ return data[0] << 21 | data[1] << 14 | data[2] << 7 | data[3];
+ }; // return a percent-encoded representation of the specified byte range
+ // @see http://en.wikipedia.org/wiki/Percent-encoding
+
+ var percentEncode = function (bytes, start, end) {
+ var i,
+ result = '';
+ for (i = start; i < end; i++) {
+ result += '%' + ('00' + bytes[i].toString(16)).slice(-2);
+ }
+ return result;
+ }; // return the string representation of the specified byte range,
+ // interpreted as ISO-8859-1.
+
+ var parseIso88591 = function (bytes, start, end) {
+ return unescape(percentEncode(bytes, start, end)); // jshint ignore:line
+ };
+
+ var parseAdtsSize = function (header, byteIndex) {
+ var lowThree = (header[byteIndex + 5] & 0xE0) >> 5,
+ middle = header[byteIndex + 4] << 3,
+ highTwo = header[byteIndex + 3] & 0x3 << 11;
+ return highTwo | middle | lowThree;
+ };
+ var parseType$4 = function (header, byteIndex) {
+ if (header[byteIndex] === 'I'.charCodeAt(0) && header[byteIndex + 1] === 'D'.charCodeAt(0) && header[byteIndex + 2] === '3'.charCodeAt(0)) {
+ return 'timed-metadata';
+ } else if (header[byteIndex] & 0xff === 0xff && (header[byteIndex + 1] & 0xf0) === 0xf0) {
+ return 'audio';
+ }
+ return null;
+ };
+ var parseSampleRate = function (packet) {
+ var i = 0;
+ while (i + 5 < packet.length) {
+ if (packet[i] !== 0xFF || (packet[i + 1] & 0xF6) !== 0xF0) {
+ // If a valid header was not found, jump one forward and attempt to
+ // find a valid ADTS header starting at the next byte
+ i++;
+ continue;
+ }
+ return ADTS_SAMPLING_FREQUENCIES[(packet[i + 2] & 0x3c) >>> 2];
+ }
+ return null;
+ };
+ var parseAacTimestamp = function (packet) {
+ var frameStart, frameSize, frame, frameHeader; // find the start of the first frame and the end of the tag
+
+ frameStart = 10;
+ if (packet[5] & 0x40) {
+ // advance the frame start past the extended header
+ frameStart += 4; // header size field
+
+ frameStart += parseSyncSafeInteger(packet.subarray(10, 14));
+ } // parse one or more ID3 frames
+ // http://id3.org/id3v2.3.0#ID3v2_frame_overview
+
+ do {
+ // determine the number of bytes in this frame
+ frameSize = parseSyncSafeInteger(packet.subarray(frameStart + 4, frameStart + 8));
+ if (frameSize < 1) {
+ return null;
+ }
+ frameHeader = String.fromCharCode(packet[frameStart], packet[frameStart + 1], packet[frameStart + 2], packet[frameStart + 3]);
+ if (frameHeader === 'PRIV') {
+ frame = packet.subarray(frameStart + 10, frameStart + frameSize + 10);
+ for (var i = 0; i < frame.byteLength; i++) {
+ if (frame[i] === 0) {
+ var owner = parseIso88591(frame, 0, i);
+ if (owner === 'com.apple.streaming.transportStreamTimestamp') {
+ var d = frame.subarray(i + 1);
+ var size = (d[3] & 0x01) << 30 | d[4] << 22 | d[5] << 14 | d[6] << 6 | d[7] >>> 2;
+ size *= 4;
+ size += d[7] & 0x03;
+ return size;
+ }
+ break;
+ }
+ }
+ }
+ frameStart += 10; // advance past the frame header
+
+ frameStart += frameSize; // advance past the frame body
+ } while (frameStart < packet.byteLength);
+ return null;
+ };
+ var utils = {
+ isLikelyAacData: isLikelyAacData$1,
+ parseId3TagSize: parseId3TagSize,
+ parseAdtsSize: parseAdtsSize,
+ parseType: parseType$4,
+ parseSampleRate: parseSampleRate,
+ parseAacTimestamp: parseAacTimestamp
+ };
+ /**
+ * mux.js
+ *
+ * Copyright (c) Brightcove
+ * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
+ *
+ * A stream-based aac to mp4 converter. This utility can be used to
+ * deliver mp4s to a SourceBuffer on platforms that support native
+ * Media Source Extensions.
+ */
+
+ var Stream$1 = stream;
+ var aacUtils = utils; // Constants
+
+ var AacStream$1;
+ /**
+ * Splits an incoming stream of binary data into ADTS and ID3 Frames.
+ */
+
+ AacStream$1 = function () {
+ var everything = new Uint8Array(),
+ timeStamp = 0;
+ AacStream$1.prototype.init.call(this);
+ this.setTimestamp = function (timestamp) {
+ timeStamp = timestamp;
+ };
+ this.push = function (bytes) {
+ var frameSize = 0,
+ byteIndex = 0,
+ bytesLeft,
+ chunk,
+ packet,
+ tempLength; // If there are bytes remaining from the last segment, prepend them to the
+ // bytes that were pushed in
+
+ if (everything.length) {
+ tempLength = everything.length;
+ everything = new Uint8Array(bytes.byteLength + tempLength);
+ everything.set(everything.subarray(0, tempLength));
+ everything.set(bytes, tempLength);
+ } else {
+ everything = bytes;
+ }
+ while (everything.length - byteIndex >= 3) {
+ if (everything[byteIndex] === 'I'.charCodeAt(0) && everything[byteIndex + 1] === 'D'.charCodeAt(0) && everything[byteIndex + 2] === '3'.charCodeAt(0)) {
+ // Exit early because we don't have enough to parse
+ // the ID3 tag header
+ if (everything.length - byteIndex < 10) {
+ break;
+ } // check framesize
+
+ frameSize = aacUtils.parseId3TagSize(everything, byteIndex); // Exit early if we don't have enough in the buffer
+ // to emit a full packet
+ // Add to byteIndex to support multiple ID3 tags in sequence
+
+ if (byteIndex + frameSize > everything.length) {
+ break;
+ }
+ chunk = {
+ type: 'timed-metadata',
+ data: everything.subarray(byteIndex, byteIndex + frameSize)
+ };
+ this.trigger('data', chunk);
+ byteIndex += frameSize;
+ continue;
+ } else if ((everything[byteIndex] & 0xff) === 0xff && (everything[byteIndex + 1] & 0xf0) === 0xf0) {
+ // Exit early because we don't have enough to parse
+ // the ADTS frame header
+ if (everything.length - byteIndex < 7) {
+ break;
+ }
+ frameSize = aacUtils.parseAdtsSize(everything, byteIndex); // Exit early if we don't have enough in the buffer
+ // to emit a full packet
+
+ if (byteIndex + frameSize > everything.length) {
+ break;
+ }
+ packet = {
+ type: 'audio',
+ data: everything.subarray(byteIndex, byteIndex + frameSize),
+ pts: timeStamp,
+ dts: timeStamp
+ };
+ this.trigger('data', packet);
+ byteIndex += frameSize;
+ continue;
+ }
+ byteIndex++;
+ }
+ bytesLeft = everything.length - byteIndex;
+ if (bytesLeft > 0) {
+ everything = everything.subarray(byteIndex);
+ } else {
+ everything = new Uint8Array();
+ }
+ };
+ this.reset = function () {
+ everything = new Uint8Array();
+ this.trigger('reset');
+ };
+ this.endTimeline = function () {
+ everything = new Uint8Array();
+ this.trigger('endedtimeline');
+ };
+ };
+ AacStream$1.prototype = new Stream$1();
+ var aac = AacStream$1;
+ var AUDIO_PROPERTIES$1 = ['audioobjecttype', 'channelcount', 'samplerate', 'samplingfrequencyindex', 'samplesize'];
+ var audioProperties = AUDIO_PROPERTIES$1;
+ var VIDEO_PROPERTIES$1 = ['width', 'height', 'profileIdc', 'levelIdc', 'profileCompatibility', 'sarRatio'];
+ var videoProperties = VIDEO_PROPERTIES$1;
+ /**
+ * mux.js
+ *
+ * Copyright (c) Brightcove
+ * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
+ *
+ * A stream-based mp2t to mp4 converter. This utility can be used to
+ * deliver mp4s to a SourceBuffer on platforms that support native
+ * Media Source Extensions.
+ */
+
+ var Stream = stream;
+ var mp4 = mp4Generator;
+ var frameUtils = frameUtils$1;
+ var audioFrameUtils = audioFrameUtils$1;
+ var trackDecodeInfo = trackDecodeInfo$1;
+ var m2ts = m2ts_1;
+ var clock = clock$2;
+ var AdtsStream = adts;
+ var H264Stream = h264.H264Stream;
+ var AacStream = aac;
+ var isLikelyAacData = utils.isLikelyAacData;
+ var ONE_SECOND_IN_TS$1 = clock$2.ONE_SECOND_IN_TS;
+ var AUDIO_PROPERTIES = audioProperties;
+ var VIDEO_PROPERTIES = videoProperties; // object types
+
+ var VideoSegmentStream, AudioSegmentStream, Transmuxer, CoalesceStream;
+ var retriggerForStream = function (key, event) {
+ event.stream = key;
+ this.trigger('log', event);
+ };
+ var addPipelineLogRetriggers = function (transmuxer, pipeline) {
+ var keys = Object.keys(pipeline);
+ for (var i = 0; i < keys.length; i++) {
+ var key = keys[i]; // skip non-stream keys and headOfPipeline
+ // which is just a duplicate
+
+ if (key === 'headOfPipeline' || !pipeline[key].on) {
+ continue;
+ }
+ pipeline[key].on('log', retriggerForStream.bind(transmuxer, key));
+ }
+ };
+ /**
+ * Compare two arrays (even typed) for same-ness
+ */
+
+ var arrayEquals = function (a, b) {
+ var i;
+ if (a.length !== b.length) {
+ return false;
+ } // compare the value of each element in the array
+
+ for (i = 0; i < a.length; i++) {
+ if (a[i] !== b[i]) {
+ return false;
+ }
+ }
+ return true;
+ };
+ var generateSegmentTimingInfo = function (baseMediaDecodeTime, startDts, startPts, endDts, endPts, prependedContentDuration) {
+ var ptsOffsetFromDts = startPts - startDts,
+ decodeDuration = endDts - startDts,
+ presentationDuration = endPts - startPts; // The PTS and DTS values are based on the actual stream times from the segment,
+ // however, the player time values will reflect a start from the baseMediaDecodeTime.
+ // In order to provide relevant values for the player times, base timing info on the
+ // baseMediaDecodeTime and the DTS and PTS durations of the segment.
+
+ return {
+ start: {
+ dts: baseMediaDecodeTime,
+ pts: baseMediaDecodeTime + ptsOffsetFromDts
+ },
+ end: {
+ dts: baseMediaDecodeTime + decodeDuration,
+ pts: baseMediaDecodeTime + presentationDuration
+ },
+ prependedContentDuration: prependedContentDuration,
+ baseMediaDecodeTime: baseMediaDecodeTime
+ };
+ };
+ /**
+ * Constructs a single-track, ISO BMFF media segment from AAC data
+ * events. The output of this stream can be fed to a SourceBuffer
+ * configured with a suitable initialization segment.
+ * @param track {object} track metadata configuration
+ * @param options {object} transmuxer options object
+ * @param options.keepOriginalTimestamps {boolean} If true, keep the timestamps
+ * in the source; false to adjust the first segment to start at 0.
+ */
+
+ AudioSegmentStream = function (track, options) {
+ var adtsFrames = [],
+ sequenceNumber,
+ earliestAllowedDts = 0,
+ audioAppendStartTs = 0,
+ videoBaseMediaDecodeTime = Infinity;
+ options = options || {};
+ sequenceNumber = options.firstSequenceNumber || 0;
+ AudioSegmentStream.prototype.init.call(this);
+ this.push = function (data) {
+ trackDecodeInfo.collectDtsInfo(track, data);
+ if (track) {
+ AUDIO_PROPERTIES.forEach(function (prop) {
+ track[prop] = data[prop];
+ });
+ } // buffer audio data until end() is called
+
+ adtsFrames.push(data);
+ };
+ this.setEarliestDts = function (earliestDts) {
+ earliestAllowedDts = earliestDts;
+ };
+ this.setVideoBaseMediaDecodeTime = function (baseMediaDecodeTime) {
+ videoBaseMediaDecodeTime = baseMediaDecodeTime;
+ };
+ this.setAudioAppendStart = function (timestamp) {
+ audioAppendStartTs = timestamp;
+ };
+ this.flush = function () {
+ var frames, moof, mdat, boxes, frameDuration, segmentDuration, videoClockCyclesOfSilencePrefixed; // return early if no audio data has been observed
+
+ if (adtsFrames.length === 0) {
+ this.trigger('done', 'AudioSegmentStream');
+ return;
+ }
+ frames = audioFrameUtils.trimAdtsFramesByEarliestDts(adtsFrames, track, earliestAllowedDts);
+ track.baseMediaDecodeTime = trackDecodeInfo.calculateTrackBaseMediaDecodeTime(track, options.keepOriginalTimestamps); // amount of audio filled but the value is in video clock rather than audio clock
+
+ videoClockCyclesOfSilencePrefixed = audioFrameUtils.prefixWithSilence(track, frames, audioAppendStartTs, videoBaseMediaDecodeTime); // we have to build the index from byte locations to
+ // samples (that is, adts frames) in the audio data
+
+ track.samples = audioFrameUtils.generateSampleTable(frames); // concatenate the audio data to constuct the mdat
+
+ mdat = mp4.mdat(audioFrameUtils.concatenateFrameData(frames));
+ adtsFrames = [];
+ moof = mp4.moof(sequenceNumber, [track]);
+ boxes = new Uint8Array(moof.byteLength + mdat.byteLength); // bump the sequence number for next time
+
+ sequenceNumber++;
+ boxes.set(moof);
+ boxes.set(mdat, moof.byteLength);
+ trackDecodeInfo.clearDtsInfo(track);
+ frameDuration = Math.ceil(ONE_SECOND_IN_TS$1 * 1024 / track.samplerate); // TODO this check was added to maintain backwards compatibility (particularly with
+ // tests) on adding the timingInfo event. However, it seems unlikely that there's a
+ // valid use-case where an init segment/data should be triggered without associated
+ // frames. Leaving for now, but should be looked into.
+
+ if (frames.length) {
+ segmentDuration = frames.length * frameDuration;
+ this.trigger('segmentTimingInfo', generateSegmentTimingInfo(
+ // The audio track's baseMediaDecodeTime is in audio clock cycles, but the
+ // frame info is in video clock cycles. Convert to match expectation of
+ // listeners (that all timestamps will be based on video clock cycles).
+ clock.audioTsToVideoTs(track.baseMediaDecodeTime, track.samplerate),
+ // frame times are already in video clock, as is segment duration
+ frames[0].dts, frames[0].pts, frames[0].dts + segmentDuration, frames[0].pts + segmentDuration, videoClockCyclesOfSilencePrefixed || 0));
+ this.trigger('timingInfo', {
+ start: frames[0].pts,
+ end: frames[0].pts + segmentDuration
+ });
+ }
+ this.trigger('data', {
+ track: track,
+ boxes: boxes
+ });
+ this.trigger('done', 'AudioSegmentStream');
+ };
+ this.reset = function () {
+ trackDecodeInfo.clearDtsInfo(track);
+ adtsFrames = [];
+ this.trigger('reset');
+ };
+ };
+ AudioSegmentStream.prototype = new Stream();
+ /**
+ * Constructs a single-track, ISO BMFF media segment from H264 data
+ * events. The output of this stream can be fed to a SourceBuffer
+ * configured with a suitable initialization segment.
+ * @param track {object} track metadata configuration
+ * @param options {object} transmuxer options object
+ * @param options.alignGopsAtEnd {boolean} If true, start from the end of the
+ * gopsToAlignWith list when attempting to align gop pts
+ * @param options.keepOriginalTimestamps {boolean} If true, keep the timestamps
+ * in the source; false to adjust the first segment to start at 0.
+ */
+
+ VideoSegmentStream = function (track, options) {
+ var sequenceNumber,
+ nalUnits = [],
+ gopsToAlignWith = [],
+ config,
+ pps;
+ options = options || {};
+ sequenceNumber = options.firstSequenceNumber || 0;
+ VideoSegmentStream.prototype.init.call(this);
+ delete track.minPTS;
+ this.gopCache_ = [];
+ /**
+ * Constructs a ISO BMFF segment given H264 nalUnits
+ * @param {Object} nalUnit A data event representing a nalUnit
+ * @param {String} nalUnit.nalUnitType
+ * @param {Object} nalUnit.config Properties for a mp4 track
+ * @param {Uint8Array} nalUnit.data The nalUnit bytes
+ * @see lib/codecs/h264.js
+ **/
+
+ this.push = function (nalUnit) {
+ trackDecodeInfo.collectDtsInfo(track, nalUnit); // record the track config
+
+ if (nalUnit.nalUnitType === 'seq_parameter_set_rbsp' && !config) {
+ config = nalUnit.config;
+ track.sps = [nalUnit.data];
+ VIDEO_PROPERTIES.forEach(function (prop) {
+ track[prop] = config[prop];
+ }, this);
+ }
+ if (nalUnit.nalUnitType === 'pic_parameter_set_rbsp' && !pps) {
+ pps = nalUnit.data;
+ track.pps = [nalUnit.data];
+ } // buffer video until flush() is called
+
+ nalUnits.push(nalUnit);
+ };
+ /**
+ * Pass constructed ISO BMFF track and boxes on to the
+ * next stream in the pipeline
+ **/
+
+ this.flush = function () {
+ var frames,
+ gopForFusion,
+ gops,
+ moof,
+ mdat,
+ boxes,
+ prependedContentDuration = 0,
+ firstGop,
+ lastGop; // Throw away nalUnits at the start of the byte stream until
+ // we find the first AUD
+
+ while (nalUnits.length) {
+ if (nalUnits[0].nalUnitType === 'access_unit_delimiter_rbsp') {
+ break;
+ }
+ nalUnits.shift();
+ } // Return early if no video data has been observed
+
+ if (nalUnits.length === 0) {
+ this.resetStream_();
+ this.trigger('done', 'VideoSegmentStream');
+ return;
+ } // Organize the raw nal-units into arrays that represent
+ // higher-level constructs such as frames and gops
+ // (group-of-pictures)
+
+ frames = frameUtils.groupNalsIntoFrames(nalUnits);
+ gops = frameUtils.groupFramesIntoGops(frames); // If the first frame of this fragment is not a keyframe we have
+ // a problem since MSE (on Chrome) requires a leading keyframe.
+ //
+ // We have two approaches to repairing this situation:
+ // 1) GOP-FUSION:
+ // This is where we keep track of the GOPS (group-of-pictures)
+ // from previous fragments and attempt to find one that we can
+ // prepend to the current fragment in order to create a valid
+ // fragment.
+ // 2) KEYFRAME-PULLING:
+ // Here we search for the first keyframe in the fragment and
+ // throw away all the frames between the start of the fragment
+ // and that keyframe. We then extend the duration and pull the
+ // PTS of the keyframe forward so that it covers the time range
+ // of the frames that were disposed of.
+ //
+ // #1 is far prefereable over #2 which can cause "stuttering" but
+ // requires more things to be just right.
+
+ if (!gops[0][0].keyFrame) {
+ // Search for a gop for fusion from our gopCache
+ gopForFusion = this.getGopForFusion_(nalUnits[0], track);
+ if (gopForFusion) {
+ // in order to provide more accurate timing information about the segment, save
+ // the number of seconds prepended to the original segment due to GOP fusion
+ prependedContentDuration = gopForFusion.duration;
+ gops.unshift(gopForFusion); // Adjust Gops' metadata to account for the inclusion of the
+ // new gop at the beginning
+
+ gops.byteLength += gopForFusion.byteLength;
+ gops.nalCount += gopForFusion.nalCount;
+ gops.pts = gopForFusion.pts;
+ gops.dts = gopForFusion.dts;
+ gops.duration += gopForFusion.duration;
+ } else {
+ // If we didn't find a candidate gop fall back to keyframe-pulling
+ gops = frameUtils.extendFirstKeyFrame(gops);
+ }
+ } // Trim gops to align with gopsToAlignWith
+
+ if (gopsToAlignWith.length) {
+ var alignedGops;
+ if (options.alignGopsAtEnd) {
+ alignedGops = this.alignGopsAtEnd_(gops);
+ } else {
+ alignedGops = this.alignGopsAtStart_(gops);
+ }
+ if (!alignedGops) {
+ // save all the nals in the last GOP into the gop cache
+ this.gopCache_.unshift({
+ gop: gops.pop(),
+ pps: track.pps,
+ sps: track.sps
+ }); // Keep a maximum of 6 GOPs in the cache
+
+ this.gopCache_.length = Math.min(6, this.gopCache_.length); // Clear nalUnits
+
+ nalUnits = []; // return early no gops can be aligned with desired gopsToAlignWith
+
+ this.resetStream_();
+ this.trigger('done', 'VideoSegmentStream');
+ return;
+ } // Some gops were trimmed. clear dts info so minSegmentDts and pts are correct
+ // when recalculated before sending off to CoalesceStream
+
+ trackDecodeInfo.clearDtsInfo(track);
+ gops = alignedGops;
+ }
+ trackDecodeInfo.collectDtsInfo(track, gops); // First, we have to build the index from byte locations to
+ // samples (that is, frames) in the video data
+
+ track.samples = frameUtils.generateSampleTable(gops); // Concatenate the video data and construct the mdat
+
+ mdat = mp4.mdat(frameUtils.concatenateNalData(gops));
+ track.baseMediaDecodeTime = trackDecodeInfo.calculateTrackBaseMediaDecodeTime(track, options.keepOriginalTimestamps);
+ this.trigger('processedGopsInfo', gops.map(function (gop) {
+ return {
+ pts: gop.pts,
+ dts: gop.dts,
+ byteLength: gop.byteLength
+ };
+ }));
+ firstGop = gops[0];
+ lastGop = gops[gops.length - 1];
+ this.trigger('segmentTimingInfo', generateSegmentTimingInfo(track.baseMediaDecodeTime, firstGop.dts, firstGop.pts, lastGop.dts + lastGop.duration, lastGop.pts + lastGop.duration, prependedContentDuration));
+ this.trigger('timingInfo', {
+ start: gops[0].pts,
+ end: gops[gops.length - 1].pts + gops[gops.length - 1].duration
+ }); // save all the nals in the last GOP into the gop cache
+
+ this.gopCache_.unshift({
+ gop: gops.pop(),
+ pps: track.pps,
+ sps: track.sps
+ }); // Keep a maximum of 6 GOPs in the cache
+
+ this.gopCache_.length = Math.min(6, this.gopCache_.length); // Clear nalUnits
+
+ nalUnits = [];
+ this.trigger('baseMediaDecodeTime', track.baseMediaDecodeTime);
+ this.trigger('timelineStartInfo', track.timelineStartInfo);
+ moof = mp4.moof(sequenceNumber, [track]); // it would be great to allocate this array up front instead of
+ // throwing away hundreds of media segment fragments
+
+ boxes = new Uint8Array(moof.byteLength + mdat.byteLength); // Bump the sequence number for next time
+
+ sequenceNumber++;
+ boxes.set(moof);
+ boxes.set(mdat, moof.byteLength);
+ this.trigger('data', {
+ track: track,
+ boxes: boxes
+ });
+ this.resetStream_(); // Continue with the flush process now
+
+ this.trigger('done', 'VideoSegmentStream');
+ };
+ this.reset = function () {
+ this.resetStream_();
+ nalUnits = [];
+ this.gopCache_.length = 0;
+ gopsToAlignWith.length = 0;
+ this.trigger('reset');
+ };
+ this.resetStream_ = function () {
+ trackDecodeInfo.clearDtsInfo(track); // reset config and pps because they may differ across segments
+ // for instance, when we are rendition switching
+
+ config = undefined;
+ pps = undefined;
+ }; // Search for a candidate Gop for gop-fusion from the gop cache and
+ // return it or return null if no good candidate was found
+
+ this.getGopForFusion_ = function (nalUnit) {
+ var halfSecond = 45000,
+ // Half-a-second in a 90khz clock
+ allowableOverlap = 10000,
+ // About 3 frames @ 30fps
+ nearestDistance = Infinity,
+ dtsDistance,
+ nearestGopObj,
+ currentGop,
+ currentGopObj,
+ i; // Search for the GOP nearest to the beginning of this nal unit
+
+ for (i = 0; i < this.gopCache_.length; i++) {
+ currentGopObj = this.gopCache_[i];
+ currentGop = currentGopObj.gop; // Reject Gops with different SPS or PPS
+
+ if (!(track.pps && arrayEquals(track.pps[0], currentGopObj.pps[0])) || !(track.sps && arrayEquals(track.sps[0], currentGopObj.sps[0]))) {
+ continue;
+ } // Reject Gops that would require a negative baseMediaDecodeTime
+
+ if (currentGop.dts < track.timelineStartInfo.dts) {
+ continue;
+ } // The distance between the end of the gop and the start of the nalUnit
+
+ dtsDistance = nalUnit.dts - currentGop.dts - currentGop.duration; // Only consider GOPS that start before the nal unit and end within
+ // a half-second of the nal unit
+
+ if (dtsDistance >= -allowableOverlap && dtsDistance <= halfSecond) {
+ // Always use the closest GOP we found if there is more than
+ // one candidate
+ if (!nearestGopObj || nearestDistance > dtsDistance) {
+ nearestGopObj = currentGopObj;
+ nearestDistance = dtsDistance;
+ }
+ }
+ }
+ if (nearestGopObj) {
+ return nearestGopObj.gop;
+ }
+ return null;
+ }; // trim gop list to the first gop found that has a matching pts with a gop in the list
+ // of gopsToAlignWith starting from the START of the list
+
+ this.alignGopsAtStart_ = function (gops) {
+ var alignIndex, gopIndex, align, gop, byteLength, nalCount, duration, alignedGops;
+ byteLength = gops.byteLength;
+ nalCount = gops.nalCount;
+ duration = gops.duration;
+ alignIndex = gopIndex = 0;
+ while (alignIndex < gopsToAlignWith.length && gopIndex < gops.length) {
+ align = gopsToAlignWith[alignIndex];
+ gop = gops[gopIndex];
+ if (align.pts === gop.pts) {
+ break;
+ }
+ if (gop.pts > align.pts) {
+ // this current gop starts after the current gop we want to align on, so increment
+ // align index
+ alignIndex++;
+ continue;
+ } // current gop starts before the current gop we want to align on. so increment gop
+ // index
+
+ gopIndex++;
+ byteLength -= gop.byteLength;
+ nalCount -= gop.nalCount;
+ duration -= gop.duration;
+ }
+ if (gopIndex === 0) {
+ // no gops to trim
+ return gops;
+ }
+ if (gopIndex === gops.length) {
+ // all gops trimmed, skip appending all gops
+ return null;
+ }
+ alignedGops = gops.slice(gopIndex);
+ alignedGops.byteLength = byteLength;
+ alignedGops.duration = duration;
+ alignedGops.nalCount = nalCount;
+ alignedGops.pts = alignedGops[0].pts;
+ alignedGops.dts = alignedGops[0].dts;
+ return alignedGops;
+ }; // trim gop list to the first gop found that has a matching pts with a gop in the list
+ // of gopsToAlignWith starting from the END of the list
+
+ this.alignGopsAtEnd_ = function (gops) {
+ var alignIndex, gopIndex, align, gop, alignEndIndex, matchFound;
+ alignIndex = gopsToAlignWith.length - 1;
+ gopIndex = gops.length - 1;
+ alignEndIndex = null;
+ matchFound = false;
+ while (alignIndex >= 0 && gopIndex >= 0) {
+ align = gopsToAlignWith[alignIndex];
+ gop = gops[gopIndex];
+ if (align.pts === gop.pts) {
+ matchFound = true;
+ break;
+ }
+ if (align.pts > gop.pts) {
+ alignIndex--;
+ continue;
+ }
+ if (alignIndex === gopsToAlignWith.length - 1) {
+ // gop.pts is greater than the last alignment candidate. If no match is found
+ // by the end of this loop, we still want to append gops that come after this
+ // point
+ alignEndIndex = gopIndex;
+ }
+ gopIndex--;
+ }
+ if (!matchFound && alignEndIndex === null) {
+ return null;
+ }
+ var trimIndex;
+ if (matchFound) {
+ trimIndex = gopIndex;
+ } else {
+ trimIndex = alignEndIndex;
+ }
+ if (trimIndex === 0) {
+ return gops;
+ }
+ var alignedGops = gops.slice(trimIndex);
+ var metadata = alignedGops.reduce(function (total, gop) {
+ total.byteLength += gop.byteLength;
+ total.duration += gop.duration;
+ total.nalCount += gop.nalCount;
+ return total;
+ }, {
+ byteLength: 0,
+ duration: 0,
+ nalCount: 0
+ });
+ alignedGops.byteLength = metadata.byteLength;
+ alignedGops.duration = metadata.duration;
+ alignedGops.nalCount = metadata.nalCount;
+ alignedGops.pts = alignedGops[0].pts;
+ alignedGops.dts = alignedGops[0].dts;
+ return alignedGops;
+ };
+ this.alignGopsWith = function (newGopsToAlignWith) {
+ gopsToAlignWith = newGopsToAlignWith;
+ };
+ };
+ VideoSegmentStream.prototype = new Stream();
+ /**
+ * A Stream that can combine multiple streams (ie. audio & video)
+ * into a single output segment for MSE. Also supports audio-only
+ * and video-only streams.
+ * @param options {object} transmuxer options object
+ * @param options.keepOriginalTimestamps {boolean} If true, keep the timestamps
+ * in the source; false to adjust the first segment to start at media timeline start.
+ */
+
+ CoalesceStream = function (options, metadataStream) {
+ // Number of Tracks per output segment
+ // If greater than 1, we combine multiple
+ // tracks into a single segment
+ this.numberOfTracks = 0;
+ this.metadataStream = metadataStream;
+ options = options || {};
+ if (typeof options.remux !== 'undefined') {
+ this.remuxTracks = !!options.remux;
+ } else {
+ this.remuxTracks = true;
+ }
+ if (typeof options.keepOriginalTimestamps === 'boolean') {
+ this.keepOriginalTimestamps = options.keepOriginalTimestamps;
+ } else {
+ this.keepOriginalTimestamps = false;
+ }
+ this.pendingTracks = [];
+ this.videoTrack = null;
+ this.pendingBoxes = [];
+ this.pendingCaptions = [];
+ this.pendingMetadata = [];
+ this.pendingBytes = 0;
+ this.emittedTracks = 0;
+ CoalesceStream.prototype.init.call(this); // Take output from multiple
+
+ this.push = function (output) {
+ // buffer incoming captions until the associated video segment
+ // finishes
+ if (output.content || output.text) {
+ return this.pendingCaptions.push(output);
+ } // buffer incoming id3 tags until the final flush
+
+ if (output.frames) {
+ return this.pendingMetadata.push(output);
+ } // Add this track to the list of pending tracks and store
+ // important information required for the construction of
+ // the final segment
+
+ this.pendingTracks.push(output.track);
+ this.pendingBytes += output.boxes.byteLength; // TODO: is there an issue for this against chrome?
+ // We unshift audio and push video because
+ // as of Chrome 75 when switching from
+ // one init segment to another if the video
+ // mdat does not appear after the audio mdat
+ // only audio will play for the duration of our transmux.
+
+ if (output.track.type === 'video') {
+ this.videoTrack = output.track;
+ this.pendingBoxes.push(output.boxes);
+ }
+ if (output.track.type === 'audio') {
+ this.audioTrack = output.track;
+ this.pendingBoxes.unshift(output.boxes);
+ }
+ };
+ };
+ CoalesceStream.prototype = new Stream();
+ CoalesceStream.prototype.flush = function (flushSource) {
+ var offset = 0,
+ event = {
+ captions: [],
+ captionStreams: {},
+ metadata: [],
+ info: {}
+ },
+ caption,
+ id3,
+ initSegment,
+ timelineStartPts = 0,
+ i;
+ if (this.pendingTracks.length < this.numberOfTracks) {
+ if (flushSource !== 'VideoSegmentStream' && flushSource !== 'AudioSegmentStream') {
+ // Return because we haven't received a flush from a data-generating
+ // portion of the segment (meaning that we have only recieved meta-data
+ // or captions.)
+ return;
+ } else if (this.remuxTracks) {
+ // Return until we have enough tracks from the pipeline to remux (if we
+ // are remuxing audio and video into a single MP4)
+ return;
+ } else if (this.pendingTracks.length === 0) {
+ // In the case where we receive a flush without any data having been
+ // received we consider it an emitted track for the purposes of coalescing
+ // `done` events.
+ // We do this for the case where there is an audio and video track in the
+ // segment but no audio data. (seen in several playlists with alternate
+ // audio tracks and no audio present in the main TS segments.)
+ this.emittedTracks++;
+ if (this.emittedTracks >= this.numberOfTracks) {
+ this.trigger('done');
+ this.emittedTracks = 0;
+ }
+ return;
+ }
+ }
+ if (this.videoTrack) {
+ timelineStartPts = this.videoTrack.timelineStartInfo.pts;
+ VIDEO_PROPERTIES.forEach(function (prop) {
+ event.info[prop] = this.videoTrack[prop];
+ }, this);
+ } else if (this.audioTrack) {
+ timelineStartPts = this.audioTrack.timelineStartInfo.pts;
+ AUDIO_PROPERTIES.forEach(function (prop) {
+ event.info[prop] = this.audioTrack[prop];
+ }, this);
+ }
+ if (this.videoTrack || this.audioTrack) {
+ if (this.pendingTracks.length === 1) {
+ event.type = this.pendingTracks[0].type;
+ } else {
+ event.type = 'combined';
+ }
+ this.emittedTracks += this.pendingTracks.length;
+ initSegment = mp4.initSegment(this.pendingTracks); // Create a new typed array to hold the init segment
+
+ event.initSegment = new Uint8Array(initSegment.byteLength); // Create an init segment containing a moov
+ // and track definitions
+
+ event.initSegment.set(initSegment); // Create a new typed array to hold the moof+mdats
+
+ event.data = new Uint8Array(this.pendingBytes); // Append each moof+mdat (one per track) together
+
+ for (i = 0; i < this.pendingBoxes.length; i++) {
+ event.data.set(this.pendingBoxes[i], offset);
+ offset += this.pendingBoxes[i].byteLength;
+ } // Translate caption PTS times into second offsets to match the
+ // video timeline for the segment, and add track info
+
+ for (i = 0; i < this.pendingCaptions.length; i++) {
+ caption = this.pendingCaptions[i];
+ caption.startTime = clock.metadataTsToSeconds(caption.startPts, timelineStartPts, this.keepOriginalTimestamps);
+ caption.endTime = clock.metadataTsToSeconds(caption.endPts, timelineStartPts, this.keepOriginalTimestamps);
+ event.captionStreams[caption.stream] = true;
+ event.captions.push(caption);
+ } // Translate ID3 frame PTS times into second offsets to match the
+ // video timeline for the segment
+
+ for (i = 0; i < this.pendingMetadata.length; i++) {
+ id3 = this.pendingMetadata[i];
+ id3.cueTime = clock.metadataTsToSeconds(id3.pts, timelineStartPts, this.keepOriginalTimestamps);
+ event.metadata.push(id3);
+ } // We add this to every single emitted segment even though we only need
+ // it for the first
+
+ event.metadata.dispatchType = this.metadataStream.dispatchType; // Reset stream state
+
+ this.pendingTracks.length = 0;
+ this.videoTrack = null;
+ this.pendingBoxes.length = 0;
+ this.pendingCaptions.length = 0;
+ this.pendingBytes = 0;
+ this.pendingMetadata.length = 0; // Emit the built segment
+ // We include captions and ID3 tags for backwards compatibility,
+ // ideally we should send only video and audio in the data event
+
+ this.trigger('data', event); // Emit each caption to the outside world
+ // Ideally, this would happen immediately on parsing captions,
+ // but we need to ensure that video data is sent back first
+ // so that caption timing can be adjusted to match video timing
+
+ for (i = 0; i < event.captions.length; i++) {
+ caption = event.captions[i];
+ this.trigger('caption', caption);
+ } // Emit each id3 tag to the outside world
+ // Ideally, this would happen immediately on parsing the tag,
+ // but we need to ensure that video data is sent back first
+ // so that ID3 frame timing can be adjusted to match video timing
+
+ for (i = 0; i < event.metadata.length; i++) {
+ id3 = event.metadata[i];
+ this.trigger('id3Frame', id3);
+ }
+ } // Only emit `done` if all tracks have been flushed and emitted
+
+ if (this.emittedTracks >= this.numberOfTracks) {
+ this.trigger('done');
+ this.emittedTracks = 0;
+ }
+ };
+ CoalesceStream.prototype.setRemux = function (val) {
+ this.remuxTracks = val;
+ };
+ /**
+ * A Stream that expects MP2T binary data as input and produces
+ * corresponding media segments, suitable for use with Media Source
+ * Extension (MSE) implementations that support the ISO BMFF byte
+ * stream format, like Chrome.
+ */
+
+ Transmuxer = function (options) {
+ var self = this,
+ hasFlushed = true,
+ videoTrack,
+ audioTrack;
+ Transmuxer.prototype.init.call(this);
+ options = options || {};
+ this.baseMediaDecodeTime = options.baseMediaDecodeTime || 0;
+ this.transmuxPipeline_ = {};
+ this.setupAacPipeline = function () {
+ var pipeline = {};
+ this.transmuxPipeline_ = pipeline;
+ pipeline.type = 'aac';
+ pipeline.metadataStream = new m2ts.MetadataStream(); // set up the parsing pipeline
+
+ pipeline.aacStream = new AacStream();
+ pipeline.audioTimestampRolloverStream = new m2ts.TimestampRolloverStream('audio');
+ pipeline.timedMetadataTimestampRolloverStream = new m2ts.TimestampRolloverStream('timed-metadata');
+ pipeline.adtsStream = new AdtsStream();
+ pipeline.coalesceStream = new CoalesceStream(options, pipeline.metadataStream);
+ pipeline.headOfPipeline = pipeline.aacStream;
+ pipeline.aacStream.pipe(pipeline.audioTimestampRolloverStream).pipe(pipeline.adtsStream);
+ pipeline.aacStream.pipe(pipeline.timedMetadataTimestampRolloverStream).pipe(pipeline.metadataStream).pipe(pipeline.coalesceStream);
+ pipeline.metadataStream.on('timestamp', function (frame) {
+ pipeline.aacStream.setTimestamp(frame.timeStamp);
+ });
+ pipeline.aacStream.on('data', function (data) {
+ if (data.type !== 'timed-metadata' && data.type !== 'audio' || pipeline.audioSegmentStream) {
+ return;
+ }
+ audioTrack = audioTrack || {
+ timelineStartInfo: {
+ baseMediaDecodeTime: self.baseMediaDecodeTime
+ },
+ codec: 'adts',
+ type: 'audio'
+ }; // hook up the audio segment stream to the first track with aac data
+
+ pipeline.coalesceStream.numberOfTracks++;
+ pipeline.audioSegmentStream = new AudioSegmentStream(audioTrack, options);
+ pipeline.audioSegmentStream.on('log', self.getLogTrigger_('audioSegmentStream'));
+ pipeline.audioSegmentStream.on('timingInfo', self.trigger.bind(self, 'audioTimingInfo')); // Set up the final part of the audio pipeline
+
+ pipeline.adtsStream.pipe(pipeline.audioSegmentStream).pipe(pipeline.coalesceStream); // emit pmt info
+
+ self.trigger('trackinfo', {
+ hasAudio: !!audioTrack,
+ hasVideo: !!videoTrack
+ });
+ }); // Re-emit any data coming from the coalesce stream to the outside world
+
+ pipeline.coalesceStream.on('data', this.trigger.bind(this, 'data')); // Let the consumer know we have finished flushing the entire pipeline
+
+ pipeline.coalesceStream.on('done', this.trigger.bind(this, 'done'));
+ addPipelineLogRetriggers(this, pipeline);
+ };
+ this.setupTsPipeline = function () {
+ var pipeline = {};
+ this.transmuxPipeline_ = pipeline;
+ pipeline.type = 'ts';
+ pipeline.metadataStream = new m2ts.MetadataStream(); // set up the parsing pipeline
+
+ pipeline.packetStream = new m2ts.TransportPacketStream();
+ pipeline.parseStream = new m2ts.TransportParseStream();
+ pipeline.elementaryStream = new m2ts.ElementaryStream();
+ pipeline.timestampRolloverStream = new m2ts.TimestampRolloverStream();
+ pipeline.adtsStream = new AdtsStream();
+ pipeline.h264Stream = new H264Stream();
+ pipeline.captionStream = new m2ts.CaptionStream(options);
+ pipeline.coalesceStream = new CoalesceStream(options, pipeline.metadataStream);
+ pipeline.headOfPipeline = pipeline.packetStream; // disassemble MPEG2-TS packets into elementary streams
+
+ pipeline.packetStream.pipe(pipeline.parseStream).pipe(pipeline.elementaryStream).pipe(pipeline.timestampRolloverStream); // !!THIS ORDER IS IMPORTANT!!
+ // demux the streams
+
+ pipeline.timestampRolloverStream.pipe(pipeline.h264Stream);
+ pipeline.timestampRolloverStream.pipe(pipeline.adtsStream);
+ pipeline.timestampRolloverStream.pipe(pipeline.metadataStream).pipe(pipeline.coalesceStream); // Hook up CEA-608/708 caption stream
+
+ pipeline.h264Stream.pipe(pipeline.captionStream).pipe(pipeline.coalesceStream);
+ pipeline.elementaryStream.on('data', function (data) {
+ var i;
+ if (data.type === 'metadata') {
+ i = data.tracks.length; // scan the tracks listed in the metadata
+
+ while (i--) {
+ if (!videoTrack && data.tracks[i].type === 'video') {
+ videoTrack = data.tracks[i];
+ videoTrack.timelineStartInfo.baseMediaDecodeTime = self.baseMediaDecodeTime;
+ } else if (!audioTrack && data.tracks[i].type === 'audio') {
+ audioTrack = data.tracks[i];
+ audioTrack.timelineStartInfo.baseMediaDecodeTime = self.baseMediaDecodeTime;
+ }
+ } // hook up the video segment stream to the first track with h264 data
+
+ if (videoTrack && !pipeline.videoSegmentStream) {
+ pipeline.coalesceStream.numberOfTracks++;
+ pipeline.videoSegmentStream = new VideoSegmentStream(videoTrack, options);
+ pipeline.videoSegmentStream.on('log', self.getLogTrigger_('videoSegmentStream'));
+ pipeline.videoSegmentStream.on('timelineStartInfo', function (timelineStartInfo) {
+ // When video emits timelineStartInfo data after a flush, we forward that
+ // info to the AudioSegmentStream, if it exists, because video timeline
+ // data takes precedence. Do not do this if keepOriginalTimestamps is set,
+ // because this is a particularly subtle form of timestamp alteration.
+ if (audioTrack && !options.keepOriginalTimestamps) {
+ audioTrack.timelineStartInfo = timelineStartInfo; // On the first segment we trim AAC frames that exist before the
+ // very earliest DTS we have seen in video because Chrome will
+ // interpret any video track with a baseMediaDecodeTime that is
+ // non-zero as a gap.
+
+ pipeline.audioSegmentStream.setEarliestDts(timelineStartInfo.dts - self.baseMediaDecodeTime);
+ }
+ });
+ pipeline.videoSegmentStream.on('processedGopsInfo', self.trigger.bind(self, 'gopInfo'));
+ pipeline.videoSegmentStream.on('segmentTimingInfo', self.trigger.bind(self, 'videoSegmentTimingInfo'));
+ pipeline.videoSegmentStream.on('baseMediaDecodeTime', function (baseMediaDecodeTime) {
+ if (audioTrack) {
+ pipeline.audioSegmentStream.setVideoBaseMediaDecodeTime(baseMediaDecodeTime);
+ }
+ });
+ pipeline.videoSegmentStream.on('timingInfo', self.trigger.bind(self, 'videoTimingInfo')); // Set up the final part of the video pipeline
+
+ pipeline.h264Stream.pipe(pipeline.videoSegmentStream).pipe(pipeline.coalesceStream);
+ }
+ if (audioTrack && !pipeline.audioSegmentStream) {
+ // hook up the audio segment stream to the first track with aac data
+ pipeline.coalesceStream.numberOfTracks++;
+ pipeline.audioSegmentStream = new AudioSegmentStream(audioTrack, options);
+ pipeline.audioSegmentStream.on('log', self.getLogTrigger_('audioSegmentStream'));
+ pipeline.audioSegmentStream.on('timingInfo', self.trigger.bind(self, 'audioTimingInfo'));
+ pipeline.audioSegmentStream.on('segmentTimingInfo', self.trigger.bind(self, 'audioSegmentTimingInfo')); // Set up the final part of the audio pipeline
+
+ pipeline.adtsStream.pipe(pipeline.audioSegmentStream).pipe(pipeline.coalesceStream);
+ } // emit pmt info
+
+ self.trigger('trackinfo', {
+ hasAudio: !!audioTrack,
+ hasVideo: !!videoTrack
+ });
+ }
+ }); // Re-emit any data coming from the coalesce stream to the outside world
+
+ pipeline.coalesceStream.on('data', this.trigger.bind(this, 'data'));
+ pipeline.coalesceStream.on('id3Frame', function (id3Frame) {
+ id3Frame.dispatchType = pipeline.metadataStream.dispatchType;
+ self.trigger('id3Frame', id3Frame);
+ });
+ pipeline.coalesceStream.on('caption', this.trigger.bind(this, 'caption')); // Let the consumer know we have finished flushing the entire pipeline
+
+ pipeline.coalesceStream.on('done', this.trigger.bind(this, 'done'));
+ addPipelineLogRetriggers(this, pipeline);
+ }; // hook up the segment streams once track metadata is delivered
+
+ this.setBaseMediaDecodeTime = function (baseMediaDecodeTime) {
+ var pipeline = this.transmuxPipeline_;
+ if (!options.keepOriginalTimestamps) {
+ this.baseMediaDecodeTime = baseMediaDecodeTime;
+ }
+ if (audioTrack) {
+ audioTrack.timelineStartInfo.dts = undefined;
+ audioTrack.timelineStartInfo.pts = undefined;
+ trackDecodeInfo.clearDtsInfo(audioTrack);
+ if (pipeline.audioTimestampRolloverStream) {
+ pipeline.audioTimestampRolloverStream.discontinuity();
+ }
+ }
+ if (videoTrack) {
+ if (pipeline.videoSegmentStream) {
+ pipeline.videoSegmentStream.gopCache_ = [];
+ }
+ videoTrack.timelineStartInfo.dts = undefined;
+ videoTrack.timelineStartInfo.pts = undefined;
+ trackDecodeInfo.clearDtsInfo(videoTrack);
+ pipeline.captionStream.reset();
+ }
+ if (pipeline.timestampRolloverStream) {
+ pipeline.timestampRolloverStream.discontinuity();
+ }
+ };
+ this.setAudioAppendStart = function (timestamp) {
+ if (audioTrack) {
+ this.transmuxPipeline_.audioSegmentStream.setAudioAppendStart(timestamp);
+ }
+ };
+ this.setRemux = function (val) {
+ var pipeline = this.transmuxPipeline_;
+ options.remux = val;
+ if (pipeline && pipeline.coalesceStream) {
+ pipeline.coalesceStream.setRemux(val);
+ }
+ };
+ this.alignGopsWith = function (gopsToAlignWith) {
+ if (videoTrack && this.transmuxPipeline_.videoSegmentStream) {
+ this.transmuxPipeline_.videoSegmentStream.alignGopsWith(gopsToAlignWith);
+ }
+ };
+ this.getLogTrigger_ = function (key) {
+ var self = this;
+ return function (event) {
+ event.stream = key;
+ self.trigger('log', event);
+ };
+ }; // feed incoming data to the front of the parsing pipeline
+
+ this.push = function (data) {
+ if (hasFlushed) {
+ var isAac = isLikelyAacData(data);
+ if (isAac && this.transmuxPipeline_.type !== 'aac') {
+ this.setupAacPipeline();
+ } else if (!isAac && this.transmuxPipeline_.type !== 'ts') {
+ this.setupTsPipeline();
+ }
+ hasFlushed = false;
+ }
+ this.transmuxPipeline_.headOfPipeline.push(data);
+ }; // flush any buffered data
+
+ this.flush = function () {
+ hasFlushed = true; // Start at the top of the pipeline and flush all pending work
+
+ this.transmuxPipeline_.headOfPipeline.flush();
+ };
+ this.endTimeline = function () {
+ this.transmuxPipeline_.headOfPipeline.endTimeline();
+ };
+ this.reset = function () {
+ if (this.transmuxPipeline_.headOfPipeline) {
+ this.transmuxPipeline_.headOfPipeline.reset();
+ }
+ }; // Caption data has to be reset when seeking outside buffered range
+
+ this.resetCaptions = function () {
+ if (this.transmuxPipeline_.captionStream) {
+ this.transmuxPipeline_.captionStream.reset();
+ }
+ };
+ };
+ Transmuxer.prototype = new Stream();
+ var transmuxer = {
+ Transmuxer: Transmuxer,
+ VideoSegmentStream: VideoSegmentStream,
+ AudioSegmentStream: AudioSegmentStream,
+ AUDIO_PROPERTIES: AUDIO_PROPERTIES,
+ VIDEO_PROPERTIES: VIDEO_PROPERTIES,
+ // exported for testing
+ generateSegmentTimingInfo: generateSegmentTimingInfo
+ };
+ /**
+ * mux.js
+ *
+ * Copyright (c) Brightcove
+ * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
+ */
+
+ var toUnsigned$3 = function (value) {
+ return value >>> 0;
+ };
+ var toHexString$1 = function (value) {
+ return ('00' + value.toString(16)).slice(-2);
+ };
+ var bin = {
+ toUnsigned: toUnsigned$3,
+ toHexString: toHexString$1
+ };
+ var parseType$3 = function (buffer) {
+ var result = '';
+ result += String.fromCharCode(buffer[0]);
+ result += String.fromCharCode(buffer[1]);
+ result += String.fromCharCode(buffer[2]);
+ result += String.fromCharCode(buffer[3]);
+ return result;
+ };
+ var parseType_1 = parseType$3;
+ var toUnsigned$2 = bin.toUnsigned;
+ var parseType$2 = parseType_1;
+ var findBox$2 = function (data, path) {
+ var results = [],
+ i,
+ size,
+ type,
+ end,
+ subresults;
+ if (!path.length) {
+ // short-circuit the search for empty paths
+ return null;
+ }
+ for (i = 0; i < data.byteLength;) {
+ size = toUnsigned$2(data[i] << 24 | data[i + 1] << 16 | data[i + 2] << 8 | data[i + 3]);
+ type = parseType$2(data.subarray(i + 4, i + 8));
+ end = size > 1 ? i + size : data.byteLength;
+ if (type === path[0]) {
+ if (path.length === 1) {
+ // this is the end of the path and we've found the box we were
+ // looking for
+ results.push(data.subarray(i + 8, end));
+ } else {
+ // recursively search for the next box along the path
+ subresults = findBox$2(data.subarray(i + 8, end), path.slice(1));
+ if (subresults.length) {
+ results = results.concat(subresults);
+ }
+ }
+ }
+ i = end;
+ } // we've finished searching all of data
+
+ return results;
+ };
+ var findBox_1 = findBox$2;
+ var toUnsigned$1 = bin.toUnsigned;
+ var getUint64$2 = numbers.getUint64;
+ var tfdt = function (data) {
+ var result = {
+ version: data[0],
+ flags: new Uint8Array(data.subarray(1, 4))
+ };
+ if (result.version === 1) {
+ result.baseMediaDecodeTime = getUint64$2(data.subarray(4));
+ } else {
+ result.baseMediaDecodeTime = toUnsigned$1(data[4] << 24 | data[5] << 16 | data[6] << 8 | data[7]);
+ }
+ return result;
+ };
+ var parseTfdt$2 = tfdt;
+ var parseSampleFlags$1 = function (flags) {
+ return {
+ isLeading: (flags[0] & 0x0c) >>> 2,
+ dependsOn: flags[0] & 0x03,
+ isDependedOn: (flags[1] & 0xc0) >>> 6,
+ hasRedundancy: (flags[1] & 0x30) >>> 4,
+ paddingValue: (flags[1] & 0x0e) >>> 1,
+ isNonSyncSample: flags[1] & 0x01,
+ degradationPriority: flags[2] << 8 | flags[3]
+ };
+ };
+ var parseSampleFlags_1 = parseSampleFlags$1;
+ var parseSampleFlags = parseSampleFlags_1;
+ var trun = function (data) {
+ var result = {
+ version: data[0],
+ flags: new Uint8Array(data.subarray(1, 4)),
+ samples: []
+ },
+ view = new DataView(data.buffer, data.byteOffset, data.byteLength),
+ // Flag interpretation
+ dataOffsetPresent = result.flags[2] & 0x01,
+ // compare with 2nd byte of 0x1
+ firstSampleFlagsPresent = result.flags[2] & 0x04,
+ // compare with 2nd byte of 0x4
+ sampleDurationPresent = result.flags[1] & 0x01,
+ // compare with 2nd byte of 0x100
+ sampleSizePresent = result.flags[1] & 0x02,
+ // compare with 2nd byte of 0x200
+ sampleFlagsPresent = result.flags[1] & 0x04,
+ // compare with 2nd byte of 0x400
+ sampleCompositionTimeOffsetPresent = result.flags[1] & 0x08,
+ // compare with 2nd byte of 0x800
+ sampleCount = view.getUint32(4),
+ offset = 8,
+ sample;
+ if (dataOffsetPresent) {
+ // 32 bit signed integer
+ result.dataOffset = view.getInt32(offset);
+ offset += 4;
+ } // Overrides the flags for the first sample only. The order of
+ // optional values will be: duration, size, compositionTimeOffset
+
+ if (firstSampleFlagsPresent && sampleCount) {
+ sample = {
+ flags: parseSampleFlags(data.subarray(offset, offset + 4))
+ };
+ offset += 4;
+ if (sampleDurationPresent) {
+ sample.duration = view.getUint32(offset);
+ offset += 4;
+ }
+ if (sampleSizePresent) {
+ sample.size = view.getUint32(offset);
+ offset += 4;
+ }
+ if (sampleCompositionTimeOffsetPresent) {
+ if (result.version === 1) {
+ sample.compositionTimeOffset = view.getInt32(offset);
+ } else {
+ sample.compositionTimeOffset = view.getUint32(offset);
+ }
+ offset += 4;
+ }
+ result.samples.push(sample);
+ sampleCount--;
+ }
+ while (sampleCount--) {
+ sample = {};
+ if (sampleDurationPresent) {
+ sample.duration = view.getUint32(offset);
+ offset += 4;
+ }
+ if (sampleSizePresent) {
+ sample.size = view.getUint32(offset);
+ offset += 4;
+ }
+ if (sampleFlagsPresent) {
+ sample.flags = parseSampleFlags(data.subarray(offset, offset + 4));
+ offset += 4;
+ }
+ if (sampleCompositionTimeOffsetPresent) {
+ if (result.version === 1) {
+ sample.compositionTimeOffset = view.getInt32(offset);
+ } else {
+ sample.compositionTimeOffset = view.getUint32(offset);
+ }
+ offset += 4;
+ }
+ result.samples.push(sample);
+ }
+ return result;
+ };
+ var parseTrun$2 = trun;
+ var tfhd = function (data) {
+ var view = new DataView(data.buffer, data.byteOffset, data.byteLength),
+ result = {
+ version: data[0],
+ flags: new Uint8Array(data.subarray(1, 4)),
+ trackId: view.getUint32(4)
+ },
+ baseDataOffsetPresent = result.flags[2] & 0x01,
+ sampleDescriptionIndexPresent = result.flags[2] & 0x02,
+ defaultSampleDurationPresent = result.flags[2] & 0x08,
+ defaultSampleSizePresent = result.flags[2] & 0x10,
+ defaultSampleFlagsPresent = result.flags[2] & 0x20,
+ durationIsEmpty = result.flags[0] & 0x010000,
+ defaultBaseIsMoof = result.flags[0] & 0x020000,
+ i;
+ i = 8;
+ if (baseDataOffsetPresent) {
+ i += 4; // truncate top 4 bytes
+ // FIXME: should we read the full 64 bits?
+
+ result.baseDataOffset = view.getUint32(12);
+ i += 4;
+ }
+ if (sampleDescriptionIndexPresent) {
+ result.sampleDescriptionIndex = view.getUint32(i);
+ i += 4;
+ }
+ if (defaultSampleDurationPresent) {
+ result.defaultSampleDuration = view.getUint32(i);
+ i += 4;
+ }
+ if (defaultSampleSizePresent) {
+ result.defaultSampleSize = view.getUint32(i);
+ i += 4;
+ }
+ if (defaultSampleFlagsPresent) {
+ result.defaultSampleFlags = view.getUint32(i);
+ }
+ if (durationIsEmpty) {
+ result.durationIsEmpty = true;
+ }
+ if (!baseDataOffsetPresent && defaultBaseIsMoof) {
+ result.baseDataOffsetIsMoof = true;
+ }
+ return result;
+ };
+ var parseTfhd$2 = tfhd;
+ var win;
+ if (typeof window !== "undefined") {
+ win = window;
+ } else if (typeof commonjsGlobal !== "undefined") {
+ win = commonjsGlobal;
+ } else if (typeof self !== "undefined") {
+ win = self;
+ } else {
+ win = {};
+ }
+ var window_1 = win;
+ /**
+ * mux.js
+ *
+ * Copyright (c) Brightcove
+ * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
+ *
+ * Reads in-band CEA-708 captions out of FMP4 segments.
+ * @see https://en.wikipedia.org/wiki/CEA-708
+ */
+
+ var discardEmulationPreventionBytes = captionPacketParser.discardEmulationPreventionBytes;
+ var CaptionStream = captionStream.CaptionStream;
+ var findBox$1 = findBox_1;
+ var parseTfdt$1 = parseTfdt$2;
+ var parseTrun$1 = parseTrun$2;
+ var parseTfhd$1 = parseTfhd$2;
+ var window$2 = window_1;
+ /**
+ * Maps an offset in the mdat to a sample based on the the size of the samples.
+ * Assumes that `parseSamples` has been called first.
+ *
+ * @param {Number} offset - The offset into the mdat
+ * @param {Object[]} samples - An array of samples, parsed using `parseSamples`
+ * @return {?Object} The matching sample, or null if no match was found.
+ *
+ * @see ISO-BMFF-12/2015, Section 8.8.8
+ **/
+
+ var mapToSample = function (offset, samples) {
+ var approximateOffset = offset;
+ for (var i = 0; i < samples.length; i++) {
+ var sample = samples[i];
+ if (approximateOffset < sample.size) {
+ return sample;
+ }
+ approximateOffset -= sample.size;
+ }
+ return null;
+ };
+ /**
+ * Finds SEI nal units contained in a Media Data Box.
+ * Assumes that `parseSamples` has been called first.
+ *
+ * @param {Uint8Array} avcStream - The bytes of the mdat
+ * @param {Object[]} samples - The samples parsed out by `parseSamples`
+ * @param {Number} trackId - The trackId of this video track
+ * @return {Object[]} seiNals - the parsed SEI NALUs found.
+ * The contents of the seiNal should match what is expected by
+ * CaptionStream.push (nalUnitType, size, data, escapedRBSP, pts, dts)
+ *
+ * @see ISO-BMFF-12/2015, Section 8.1.1
+ * @see Rec. ITU-T H.264, 7.3.2.3.1
+ **/
+
+ var findSeiNals = function (avcStream, samples, trackId) {
+ var avcView = new DataView(avcStream.buffer, avcStream.byteOffset, avcStream.byteLength),
+ result = {
+ logs: [],
+ seiNals: []
+ },
+ seiNal,
+ i,
+ length,
+ lastMatchedSample;
+ for (i = 0; i + 4 < avcStream.length; i += length) {
+ length = avcView.getUint32(i);
+ i += 4; // Bail if this doesn't appear to be an H264 stream
+
+ if (length <= 0) {
+ continue;
+ }
+ switch (avcStream[i] & 0x1F) {
+ case 0x06:
+ var data = avcStream.subarray(i + 1, i + 1 + length);
+ var matchingSample = mapToSample(i, samples);
+ seiNal = {
+ nalUnitType: 'sei_rbsp',
+ size: length,
+ data: data,
+ escapedRBSP: discardEmulationPreventionBytes(data),
+ trackId: trackId
+ };
+ if (matchingSample) {
+ seiNal.pts = matchingSample.pts;
+ seiNal.dts = matchingSample.dts;
+ lastMatchedSample = matchingSample;
+ } else if (lastMatchedSample) {
+ // If a matching sample cannot be found, use the last
+ // sample's values as they should be as close as possible
+ seiNal.pts = lastMatchedSample.pts;
+ seiNal.dts = lastMatchedSample.dts;
+ } else {
+ result.logs.push({
+ level: 'warn',
+ message: 'We\'ve encountered a nal unit without data at ' + i + ' for trackId ' + trackId + '. See mux.js#223.'
+ });
+ break;
+ }
+ result.seiNals.push(seiNal);
+ break;
+ }
+ }
+ return result;
+ };
+ /**
+ * Parses sample information out of Track Run Boxes and calculates
+ * the absolute presentation and decode timestamps of each sample.
+ *
+ * @param {Array<Uint8Array>} truns - The Trun Run boxes to be parsed
+ * @param {Number|BigInt} baseMediaDecodeTime - base media decode time from tfdt
+ @see ISO-BMFF-12/2015, Section 8.8.12
+ * @param {Object} tfhd - The parsed Track Fragment Header
+ * @see inspect.parseTfhd
+ * @return {Object[]} the parsed samples
+ *
+ * @see ISO-BMFF-12/2015, Section 8.8.8
+ **/
+
+ var parseSamples = function (truns, baseMediaDecodeTime, tfhd) {
+ var currentDts = baseMediaDecodeTime;
+ var defaultSampleDuration = tfhd.defaultSampleDuration || 0;
+ var defaultSampleSize = tfhd.defaultSampleSize || 0;
+ var trackId = tfhd.trackId;
+ var allSamples = [];
+ truns.forEach(function (trun) {
+ // Note: We currently do not parse the sample table as well
+ // as the trun. It's possible some sources will require this.
+ // moov > trak > mdia > minf > stbl
+ var trackRun = parseTrun$1(trun);
+ var samples = trackRun.samples;
+ samples.forEach(function (sample) {
+ if (sample.duration === undefined) {
+ sample.duration = defaultSampleDuration;
+ }
+ if (sample.size === undefined) {
+ sample.size = defaultSampleSize;
+ }
+ sample.trackId = trackId;
+ sample.dts = currentDts;
+ if (sample.compositionTimeOffset === undefined) {
+ sample.compositionTimeOffset = 0;
+ }
+ if (typeof currentDts === 'bigint') {
+ sample.pts = currentDts + window$2.BigInt(sample.compositionTimeOffset);
+ currentDts += window$2.BigInt(sample.duration);
+ } else {
+ sample.pts = currentDts + sample.compositionTimeOffset;
+ currentDts += sample.duration;
+ }
+ });
+ allSamples = allSamples.concat(samples);
+ });
+ return allSamples;
+ };
+ /**
+ * Parses out caption nals from an FMP4 segment's video tracks.
+ *
+ * @param {Uint8Array} segment - The bytes of a single segment
+ * @param {Number} videoTrackId - The trackId of a video track in the segment
+ * @return {Object.<Number, Object[]>} A mapping of video trackId to
+ * a list of seiNals found in that track
+ **/
+
+ var parseCaptionNals = function (segment, videoTrackId) {
+ // To get the samples
+ var trafs = findBox$1(segment, ['moof', 'traf']); // To get SEI NAL units
+
+ var mdats = findBox$1(segment, ['mdat']);
+ var captionNals = {};
+ var mdatTrafPairs = []; // Pair up each traf with a mdat as moofs and mdats are in pairs
+
+ mdats.forEach(function (mdat, index) {
+ var matchingTraf = trafs[index];
+ mdatTrafPairs.push({
+ mdat: mdat,
+ traf: matchingTraf
+ });
+ });
+ mdatTrafPairs.forEach(function (pair) {
+ var mdat = pair.mdat;
+ var traf = pair.traf;
+ var tfhd = findBox$1(traf, ['tfhd']); // Exactly 1 tfhd per traf
+
+ var headerInfo = parseTfhd$1(tfhd[0]);
+ var trackId = headerInfo.trackId;
+ var tfdt = findBox$1(traf, ['tfdt']); // Either 0 or 1 tfdt per traf
+
+ var baseMediaDecodeTime = tfdt.length > 0 ? parseTfdt$1(tfdt[0]).baseMediaDecodeTime : 0;
+ var truns = findBox$1(traf, ['trun']);
+ var samples;
+ var result; // Only parse video data for the chosen video track
+
+ if (videoTrackId === trackId && truns.length > 0) {
+ samples = parseSamples(truns, baseMediaDecodeTime, headerInfo);
+ result = findSeiNals(mdat, samples, trackId);
+ if (!captionNals[trackId]) {
+ captionNals[trackId] = {
+ seiNals: [],
+ logs: []
+ };
+ }
+ captionNals[trackId].seiNals = captionNals[trackId].seiNals.concat(result.seiNals);
+ captionNals[trackId].logs = captionNals[trackId].logs.concat(result.logs);
+ }
+ });
+ return captionNals;
+ };
+ /**
+ * Parses out inband captions from an MP4 container and returns
+ * caption objects that can be used by WebVTT and the TextTrack API.
+ * @see https://developer.mozilla.org/en-US/docs/Web/API/VTTCue
+ * @see https://developer.mozilla.org/en-US/docs/Web/API/TextTrack
+ * Assumes that `probe.getVideoTrackIds` and `probe.timescale` have been called first
+ *
+ * @param {Uint8Array} segment - The fmp4 segment containing embedded captions
+ * @param {Number} trackId - The id of the video track to parse
+ * @param {Number} timescale - The timescale for the video track from the init segment
+ *
+ * @return {?Object[]} parsedCaptions - A list of captions or null if no video tracks
+ * @return {Number} parsedCaptions[].startTime - The time to show the caption in seconds
+ * @return {Number} parsedCaptions[].endTime - The time to stop showing the caption in seconds
+ * @return {Object[]} parsedCaptions[].content - A list of individual caption segments
+ * @return {String} parsedCaptions[].content.text - The visible content of the caption segment
+ * @return {Number} parsedCaptions[].content.line - The line height from 1-15 for positioning of the caption segment
+ * @return {Number} parsedCaptions[].content.position - The column indent percentage for cue positioning from 10-80
+ **/
+
+ var parseEmbeddedCaptions = function (segment, trackId, timescale) {
+ var captionNals; // the ISO-BMFF spec says that trackId can't be zero, but there's some broken content out there
+
+ if (trackId === null) {
+ return null;
+ }
+ captionNals = parseCaptionNals(segment, trackId);
+ var trackNals = captionNals[trackId] || {};
+ return {
+ seiNals: trackNals.seiNals,
+ logs: trackNals.logs,
+ timescale: timescale
+ };
+ };
+ /**
+ * Converts SEI NALUs into captions that can be used by video.js
+ **/
+
+ var CaptionParser = function () {
+ var isInitialized = false;
+ var captionStream; // Stores segments seen before trackId and timescale are set
+
+ var segmentCache; // Stores video track ID of the track being parsed
+
+ var trackId; // Stores the timescale of the track being parsed
+
+ var timescale; // Stores captions parsed so far
+
+ var parsedCaptions; // Stores whether we are receiving partial data or not
+
+ var parsingPartial;
+ /**
+ * A method to indicate whether a CaptionParser has been initalized
+ * @returns {Boolean}
+ **/
+
+ this.isInitialized = function () {
+ return isInitialized;
+ };
+ /**
+ * Initializes the underlying CaptionStream, SEI NAL parsing
+ * and management, and caption collection
+ **/
+
+ this.init = function (options) {
+ captionStream = new CaptionStream();
+ isInitialized = true;
+ parsingPartial = options ? options.isPartial : false; // Collect dispatched captions
+
+ captionStream.on('data', function (event) {
+ // Convert to seconds in the source's timescale
+ event.startTime = event.startPts / timescale;
+ event.endTime = event.endPts / timescale;
+ parsedCaptions.captions.push(event);
+ parsedCaptions.captionStreams[event.stream] = true;
+ });
+ captionStream.on('log', function (log) {
+ parsedCaptions.logs.push(log);
+ });
+ };
+ /**
+ * Determines if a new video track will be selected
+ * or if the timescale changed
+ * @return {Boolean}
+ **/
+
+ this.isNewInit = function (videoTrackIds, timescales) {
+ if (videoTrackIds && videoTrackIds.length === 0 || timescales && typeof timescales === 'object' && Object.keys(timescales).length === 0) {
+ return false;
+ }
+ return trackId !== videoTrackIds[0] || timescale !== timescales[trackId];
+ };
+ /**
+ * Parses out SEI captions and interacts with underlying
+ * CaptionStream to return dispatched captions
+ *
+ * @param {Uint8Array} segment - The fmp4 segment containing embedded captions
+ * @param {Number[]} videoTrackIds - A list of video tracks found in the init segment
+ * @param {Object.<Number, Number>} timescales - The timescales found in the init segment
+ * @see parseEmbeddedCaptions
+ * @see m2ts/caption-stream.js
+ **/
+
+ this.parse = function (segment, videoTrackIds, timescales) {
+ var parsedData;
+ if (!this.isInitialized()) {
+ return null; // This is not likely to be a video segment
+ } else if (!videoTrackIds || !timescales) {
+ return null;
+ } else if (this.isNewInit(videoTrackIds, timescales)) {
+ // Use the first video track only as there is no
+ // mechanism to switch to other video tracks
+ trackId = videoTrackIds[0];
+ timescale = timescales[trackId]; // If an init segment has not been seen yet, hold onto segment
+ // data until we have one.
+ // the ISO-BMFF spec says that trackId can't be zero, but there's some broken content out there
+ } else if (trackId === null || !timescale) {
+ segmentCache.push(segment);
+ return null;
+ } // Now that a timescale and trackId is set, parse cached segments
+
+ while (segmentCache.length > 0) {
+ var cachedSegment = segmentCache.shift();
+ this.parse(cachedSegment, videoTrackIds, timescales);
+ }
+ parsedData = parseEmbeddedCaptions(segment, trackId, timescale);
+ if (parsedData && parsedData.logs) {
+ parsedCaptions.logs = parsedCaptions.logs.concat(parsedData.logs);
+ }
+ if (parsedData === null || !parsedData.seiNals) {
+ if (parsedCaptions.logs.length) {
+ return {
+ logs: parsedCaptions.logs,
+ captions: [],
+ captionStreams: []
+ };
+ }
+ return null;
+ }
+ this.pushNals(parsedData.seiNals); // Force the parsed captions to be dispatched
+
+ this.flushStream();
+ return parsedCaptions;
+ };
+ /**
+ * Pushes SEI NALUs onto CaptionStream
+ * @param {Object[]} nals - A list of SEI nals parsed using `parseCaptionNals`
+ * Assumes that `parseCaptionNals` has been called first
+ * @see m2ts/caption-stream.js
+ **/
+
+ this.pushNals = function (nals) {
+ if (!this.isInitialized() || !nals || nals.length === 0) {
+ return null;
+ }
+ nals.forEach(function (nal) {
+ captionStream.push(nal);
+ });
+ };
+ /**
+ * Flushes underlying CaptionStream to dispatch processed, displayable captions
+ * @see m2ts/caption-stream.js
+ **/
+
+ this.flushStream = function () {
+ if (!this.isInitialized()) {
+ return null;
+ }
+ if (!parsingPartial) {
+ captionStream.flush();
+ } else {
+ captionStream.partialFlush();
+ }
+ };
+ /**
+ * Reset caption buckets for new data
+ **/
+
+ this.clearParsedCaptions = function () {
+ parsedCaptions.captions = [];
+ parsedCaptions.captionStreams = {};
+ parsedCaptions.logs = [];
+ };
+ /**
+ * Resets underlying CaptionStream
+ * @see m2ts/caption-stream.js
+ **/
+
+ this.resetCaptionStream = function () {
+ if (!this.isInitialized()) {
+ return null;
+ }
+ captionStream.reset();
+ };
+ /**
+ * Convenience method to clear all captions flushed from the
+ * CaptionStream and still being parsed
+ * @see m2ts/caption-stream.js
+ **/
+
+ this.clearAllCaptions = function () {
+ this.clearParsedCaptions();
+ this.resetCaptionStream();
+ };
+ /**
+ * Reset caption parser
+ **/
+
+ this.reset = function () {
+ segmentCache = [];
+ trackId = null;
+ timescale = null;
+ if (!parsedCaptions) {
+ parsedCaptions = {
+ captions: [],
+ // CC1, CC2, CC3, CC4
+ captionStreams: {},
+ logs: []
+ };
+ } else {
+ this.clearParsedCaptions();
+ }
+ this.resetCaptionStream();
+ };
+ this.reset();
+ };
+ var captionParser = CaptionParser;
+ /**
+ * Returns the first string in the data array ending with a null char '\0'
+ * @param {UInt8} data
+ * @returns the string with the null char
+ */
+
+ var uint8ToCString$1 = function (data) {
+ var index = 0;
+ var curChar = String.fromCharCode(data[index]);
+ var retString = '';
+ while (curChar !== '\0') {
+ retString += curChar;
+ index++;
+ curChar = String.fromCharCode(data[index]);
+ } // Add nullChar
+
+ retString += curChar;
+ return retString;
+ };
+ var string = {
+ uint8ToCString: uint8ToCString$1
+ };
+ var uint8ToCString = string.uint8ToCString;
+ var getUint64$1 = numbers.getUint64;
+ /**
+ * Based on: ISO/IEC 23009 Section: 5.10.3.3
+ * References:
+ * https://dashif-documents.azurewebsites.net/Events/master/event.html#emsg-format
+ * https://aomediacodec.github.io/id3-emsg/
+ *
+ * Takes emsg box data as a uint8 array and returns a emsg box object
+ * @param {UInt8Array} boxData data from emsg box
+ * @returns A parsed emsg box object
+ */
+
+ var parseEmsgBox = function (boxData) {
+ // version + flags
+ var offset = 4;
+ var version = boxData[0];
+ var scheme_id_uri, value, timescale, presentation_time, presentation_time_delta, event_duration, id, message_data;
+ if (version === 0) {
+ scheme_id_uri = uint8ToCString(boxData.subarray(offset));
+ offset += scheme_id_uri.length;
+ value = uint8ToCString(boxData.subarray(offset));
+ offset += value.length;
+ var dv = new DataView(boxData.buffer);
+ timescale = dv.getUint32(offset);
+ offset += 4;
+ presentation_time_delta = dv.getUint32(offset);
+ offset += 4;
+ event_duration = dv.getUint32(offset);
+ offset += 4;
+ id = dv.getUint32(offset);
+ offset += 4;
+ } else if (version === 1) {
+ var dv = new DataView(boxData.buffer);
+ timescale = dv.getUint32(offset);
+ offset += 4;
+ presentation_time = getUint64$1(boxData.subarray(offset));
+ offset += 8;
+ event_duration = dv.getUint32(offset);
+ offset += 4;
+ id = dv.getUint32(offset);
+ offset += 4;
+ scheme_id_uri = uint8ToCString(boxData.subarray(offset));
+ offset += scheme_id_uri.length;
+ value = uint8ToCString(boxData.subarray(offset));
+ offset += value.length;
+ }
+ message_data = new Uint8Array(boxData.subarray(offset, boxData.byteLength));
+ var emsgBox = {
+ scheme_id_uri,
+ value,
+ // if timescale is undefined or 0 set to 1
+ timescale: timescale ? timescale : 1,
+ presentation_time,
+ presentation_time_delta,
+ event_duration,
+ id,
+ message_data
+ };
+ return isValidEmsgBox(version, emsgBox) ? emsgBox : undefined;
+ };
+ /**
+ * Scales a presentation time or time delta with an offset with a provided timescale
+ * @param {number} presentationTime
+ * @param {number} timescale
+ * @param {number} timeDelta
+ * @param {number} offset
+ * @returns the scaled time as a number
+ */
+
+ var scaleTime = function (presentationTime, timescale, timeDelta, offset) {
+ return presentationTime || presentationTime === 0 ? presentationTime / timescale : offset + timeDelta / timescale;
+ };
+ /**
+ * Checks the emsg box data for validity based on the version
+ * @param {number} version of the emsg box to validate
+ * @param {Object} emsg the emsg data to validate
+ * @returns if the box is valid as a boolean
+ */
+
+ var isValidEmsgBox = function (version, emsg) {
+ var hasScheme = emsg.scheme_id_uri !== '\0';
+ var isValidV0Box = version === 0 && isDefined(emsg.presentation_time_delta) && hasScheme;
+ var isValidV1Box = version === 1 && isDefined(emsg.presentation_time) && hasScheme; // Only valid versions of emsg are 0 and 1
+
+ return !(version > 1) && isValidV0Box || isValidV1Box;
+ }; // Utility function to check if an object is defined
+
+ var isDefined = function (data) {
+ return data !== undefined || data !== null;
+ };
+ var emsg$1 = {
+ parseEmsgBox: parseEmsgBox,
+ scaleTime: scaleTime
+ };
+ /**
+ * mux.js
+ *
+ * Copyright (c) Brightcove
+ * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
+ *
+ * Utilities to detect basic properties and metadata about MP4s.
+ */
+
+ var toUnsigned = bin.toUnsigned;
+ var toHexString = bin.toHexString;
+ var findBox = findBox_1;
+ var parseType$1 = parseType_1;
+ var emsg = emsg$1;
+ var parseTfhd = parseTfhd$2;
+ var parseTrun = parseTrun$2;
+ var parseTfdt = parseTfdt$2;
+ var getUint64 = numbers.getUint64;
+ var timescale, startTime, compositionStartTime, getVideoTrackIds, getTracks, getTimescaleFromMediaHeader, getEmsgID3;
+ var window$1 = window_1;
+ var parseId3Frames = parseId3.parseId3Frames;
+ /**
+ * Parses an MP4 initialization segment and extracts the timescale
+ * values for any declared tracks. Timescale values indicate the
+ * number of clock ticks per second to assume for time-based values
+ * elsewhere in the MP4.
+ *
+ * To determine the start time of an MP4, you need two pieces of
+ * information: the timescale unit and the earliest base media decode
+ * time. Multiple timescales can be specified within an MP4 but the
+ * base media decode time is always expressed in the timescale from
+ * the media header box for the track:
+ * ```
+ * moov > trak > mdia > mdhd.timescale
+ * ```
+ * @param init {Uint8Array} the bytes of the init segment
+ * @return {object} a hash of track ids to timescale values or null if
+ * the init segment is malformed.
+ */
+
+ timescale = function (init) {
+ var result = {},
+ traks = findBox(init, ['moov', 'trak']); // mdhd timescale
+
+ return traks.reduce(function (result, trak) {
+ var tkhd, version, index, id, mdhd;
+ tkhd = findBox(trak, ['tkhd'])[0];
+ if (!tkhd) {
+ return null;
+ }
+ version = tkhd[0];
+ index = version === 0 ? 12 : 20;
+ id = toUnsigned(tkhd[index] << 24 | tkhd[index + 1] << 16 | tkhd[index + 2] << 8 | tkhd[index + 3]);
+ mdhd = findBox(trak, ['mdia', 'mdhd'])[0];
+ if (!mdhd) {
+ return null;
+ }
+ version = mdhd[0];
+ index = version === 0 ? 12 : 20;
+ result[id] = toUnsigned(mdhd[index] << 24 | mdhd[index + 1] << 16 | mdhd[index + 2] << 8 | mdhd[index + 3]);
+ return result;
+ }, result);
+ };
+ /**
+ * Determine the base media decode start time, in seconds, for an MP4
+ * fragment. If multiple fragments are specified, the earliest time is
+ * returned.
+ *
+ * The base media decode time can be parsed from track fragment
+ * metadata:
+ * ```
+ * moof > traf > tfdt.baseMediaDecodeTime
+ * ```
+ * It requires the timescale value from the mdhd to interpret.
+ *
+ * @param timescale {object} a hash of track ids to timescale values.
+ * @return {number} the earliest base media decode start time for the
+ * fragment, in seconds
+ */
+
+ startTime = function (timescale, fragment) {
+ var trafs; // we need info from two childrend of each track fragment box
+
+ trafs = findBox(fragment, ['moof', 'traf']); // determine the start times for each track
+
+ var lowestTime = trafs.reduce(function (acc, traf) {
+ var tfhd = findBox(traf, ['tfhd'])[0]; // get the track id from the tfhd
+
+ var id = toUnsigned(tfhd[4] << 24 | tfhd[5] << 16 | tfhd[6] << 8 | tfhd[7]); // assume a 90kHz clock if no timescale was specified
+
+ var scale = timescale[id] || 90e3; // get the base media decode time from the tfdt
+
+ var tfdt = findBox(traf, ['tfdt'])[0];
+ var dv = new DataView(tfdt.buffer, tfdt.byteOffset, tfdt.byteLength);
+ var baseTime; // version 1 is 64 bit
+
+ if (tfdt[0] === 1) {
+ baseTime = getUint64(tfdt.subarray(4, 12));
+ } else {
+ baseTime = dv.getUint32(4);
+ } // convert base time to seconds if it is a valid number.
+
+ let seconds;
+ if (typeof baseTime === 'bigint') {
+ seconds = baseTime / window$1.BigInt(scale);
+ } else if (typeof baseTime === 'number' && !isNaN(baseTime)) {
+ seconds = baseTime / scale;
+ }
+ if (seconds < Number.MAX_SAFE_INTEGER) {
+ seconds = Number(seconds);
+ }
+ if (seconds < acc) {
+ acc = seconds;
+ }
+ return acc;
+ }, Infinity);
+ return typeof lowestTime === 'bigint' || isFinite(lowestTime) ? lowestTime : 0;
+ };
+ /**
+ * Determine the composition start, in seconds, for an MP4
+ * fragment.
+ *
+ * The composition start time of a fragment can be calculated using the base
+ * media decode time, composition time offset, and timescale, as follows:
+ *
+ * compositionStartTime = (baseMediaDecodeTime + compositionTimeOffset) / timescale
+ *
+ * All of the aforementioned information is contained within a media fragment's
+ * `traf` box, except for timescale info, which comes from the initialization
+ * segment, so a track id (also contained within a `traf`) is also necessary to
+ * associate it with a timescale
+ *
+ *
+ * @param timescales {object} - a hash of track ids to timescale values.
+ * @param fragment {Unit8Array} - the bytes of a media segment
+ * @return {number} the composition start time for the fragment, in seconds
+ **/
+
+ compositionStartTime = function (timescales, fragment) {
+ var trafBoxes = findBox(fragment, ['moof', 'traf']);
+ var baseMediaDecodeTime = 0;
+ var compositionTimeOffset = 0;
+ var trackId;
+ if (trafBoxes && trafBoxes.length) {
+ // The spec states that track run samples contained within a `traf` box are contiguous, but
+ // it does not explicitly state whether the `traf` boxes themselves are contiguous.
+ // We will assume that they are, so we only need the first to calculate start time.
+ var tfhd = findBox(trafBoxes[0], ['tfhd'])[0];
+ var trun = findBox(trafBoxes[0], ['trun'])[0];
+ var tfdt = findBox(trafBoxes[0], ['tfdt'])[0];
+ if (tfhd) {
+ var parsedTfhd = parseTfhd(tfhd);
+ trackId = parsedTfhd.trackId;
+ }
+ if (tfdt) {
+ var parsedTfdt = parseTfdt(tfdt);
+ baseMediaDecodeTime = parsedTfdt.baseMediaDecodeTime;
+ }
+ if (trun) {
+ var parsedTrun = parseTrun(trun);
+ if (parsedTrun.samples && parsedTrun.samples.length) {
+ compositionTimeOffset = parsedTrun.samples[0].compositionTimeOffset || 0;
+ }
+ }
+ } // Get timescale for this specific track. Assume a 90kHz clock if no timescale was
+ // specified.
+
+ var timescale = timescales[trackId] || 90e3; // return the composition start time, in seconds
+
+ if (typeof baseMediaDecodeTime === 'bigint') {
+ compositionTimeOffset = window$1.BigInt(compositionTimeOffset);
+ timescale = window$1.BigInt(timescale);
+ }
+ var result = (baseMediaDecodeTime + compositionTimeOffset) / timescale;
+ if (typeof result === 'bigint' && result < Number.MAX_SAFE_INTEGER) {
+ result = Number(result);
+ }
+ return result;
+ };
+ /**
+ * Find the trackIds of the video tracks in this source.
+ * Found by parsing the Handler Reference and Track Header Boxes:
+ * moov > trak > mdia > hdlr
+ * moov > trak > tkhd
+ *
+ * @param {Uint8Array} init - The bytes of the init segment for this source
+ * @return {Number[]} A list of trackIds
+ *
+ * @see ISO-BMFF-12/2015, Section 8.4.3
+ **/
+
+ getVideoTrackIds = function (init) {
+ var traks = findBox(init, ['moov', 'trak']);
+ var videoTrackIds = [];
+ traks.forEach(function (trak) {
+ var hdlrs = findBox(trak, ['mdia', 'hdlr']);
+ var tkhds = findBox(trak, ['tkhd']);
+ hdlrs.forEach(function (hdlr, index) {
+ var handlerType = parseType$1(hdlr.subarray(8, 12));
+ var tkhd = tkhds[index];
+ var view;
+ var version;
+ var trackId;
+ if (handlerType === 'vide') {
+ view = new DataView(tkhd.buffer, tkhd.byteOffset, tkhd.byteLength);
+ version = view.getUint8(0);
+ trackId = version === 0 ? view.getUint32(12) : view.getUint32(20);
+ videoTrackIds.push(trackId);
+ }
+ });
+ });
+ return videoTrackIds;
+ };
+ getTimescaleFromMediaHeader = function (mdhd) {
+ // mdhd is a FullBox, meaning it will have its own version as the first byte
+ var version = mdhd[0];
+ var index = version === 0 ? 12 : 20;
+ return toUnsigned(mdhd[index] << 24 | mdhd[index + 1] << 16 | mdhd[index + 2] << 8 | mdhd[index + 3]);
+ };
+ /**
+ * Get all the video, audio, and hint tracks from a non fragmented
+ * mp4 segment
+ */
+
+ getTracks = function (init) {
+ var traks = findBox(init, ['moov', 'trak']);
+ var tracks = [];
+ traks.forEach(function (trak) {
+ var track = {};
+ var tkhd = findBox(trak, ['tkhd'])[0];
+ var view, tkhdVersion; // id
+
+ if (tkhd) {
+ view = new DataView(tkhd.buffer, tkhd.byteOffset, tkhd.byteLength);
+ tkhdVersion = view.getUint8(0);
+ track.id = tkhdVersion === 0 ? view.getUint32(12) : view.getUint32(20);
+ }
+ var hdlr = findBox(trak, ['mdia', 'hdlr'])[0]; // type
+
+ if (hdlr) {
+ var type = parseType$1(hdlr.subarray(8, 12));
+ if (type === 'vide') {
+ track.type = 'video';
+ } else if (type === 'soun') {
+ track.type = 'audio';
+ } else {
+ track.type = type;
+ }
+ } // codec
+
+ var stsd = findBox(trak, ['mdia', 'minf', 'stbl', 'stsd'])[0];
+ if (stsd) {
+ var sampleDescriptions = stsd.subarray(8); // gives the codec type string
+
+ track.codec = parseType$1(sampleDescriptions.subarray(4, 8));
+ var codecBox = findBox(sampleDescriptions, [track.codec])[0];
+ var codecConfig, codecConfigType;
+ if (codecBox) {
+ // https://tools.ietf.org/html/rfc6381#section-3.3
+ if (/^[asm]vc[1-9]$/i.test(track.codec)) {
+ // we don't need anything but the "config" parameter of the
+ // avc1 codecBox
+ codecConfig = codecBox.subarray(78);
+ codecConfigType = parseType$1(codecConfig.subarray(4, 8));
+ if (codecConfigType === 'avcC' && codecConfig.length > 11) {
+ track.codec += '.'; // left padded with zeroes for single digit hex
+ // profile idc
+
+ track.codec += toHexString(codecConfig[9]); // the byte containing the constraint_set flags
+
+ track.codec += toHexString(codecConfig[10]); // level idc
+
+ track.codec += toHexString(codecConfig[11]);
+ } else {
+ // TODO: show a warning that we couldn't parse the codec
+ // and are using the default
+ track.codec = 'avc1.4d400d';
+ }
+ } else if (/^mp4[a,v]$/i.test(track.codec)) {
+ // we do not need anything but the streamDescriptor of the mp4a codecBox
+ codecConfig = codecBox.subarray(28);
+ codecConfigType = parseType$1(codecConfig.subarray(4, 8));
+ if (codecConfigType === 'esds' && codecConfig.length > 20 && codecConfig[19] !== 0) {
+ track.codec += '.' + toHexString(codecConfig[19]); // this value is only a single digit
+
+ track.codec += '.' + toHexString(codecConfig[20] >>> 2 & 0x3f).replace(/^0/, '');
+ } else {
+ // TODO: show a warning that we couldn't parse the codec
+ // and are using the default
+ track.codec = 'mp4a.40.2';
+ }
+ } else {
+ // flac, opus, etc
+ track.codec = track.codec.toLowerCase();
+ }
+ }
+ }
+ var mdhd = findBox(trak, ['mdia', 'mdhd'])[0];
+ if (mdhd) {
+ track.timescale = getTimescaleFromMediaHeader(mdhd);
+ }
+ tracks.push(track);
+ });
+ return tracks;
+ };
+ /**
+ * Returns an array of emsg ID3 data from the provided segmentData.
+ * An offset can also be provided as the Latest Arrival Time to calculate
+ * the Event Start Time of v0 EMSG boxes.
+ * See: https://dashif-documents.azurewebsites.net/Events/master/event.html#Inband-event-timing
+ *
+ * @param {Uint8Array} segmentData the segment byte array.
+ * @param {number} offset the segment start time or Latest Arrival Time,
+ * @return {Object[]} an array of ID3 parsed from EMSG boxes
+ */
+
+ getEmsgID3 = function (segmentData, offset = 0) {
+ var emsgBoxes = findBox(segmentData, ['emsg']);
+ return emsgBoxes.map(data => {
+ var parsedBox = emsg.parseEmsgBox(new Uint8Array(data));
+ var parsedId3Frames = parseId3Frames(parsedBox.message_data);
+ return {
+ cueTime: emsg.scaleTime(parsedBox.presentation_time, parsedBox.timescale, parsedBox.presentation_time_delta, offset),
+ duration: emsg.scaleTime(parsedBox.event_duration, parsedBox.timescale),
+ frames: parsedId3Frames
+ };
+ });
+ };
+ var probe$2 = {
+ // export mp4 inspector's findBox and parseType for backwards compatibility
+ findBox: findBox,
+ parseType: parseType$1,
+ timescale: timescale,
+ startTime: startTime,
+ compositionStartTime: compositionStartTime,
+ videoTrackIds: getVideoTrackIds,
+ tracks: getTracks,
+ getTimescaleFromMediaHeader: getTimescaleFromMediaHeader,
+ getEmsgID3: getEmsgID3
+ };
+ /**
+ * mux.js
+ *
+ * Copyright (c) Brightcove
+ * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
+ *
+ * Utilities to detect basic properties and metadata about TS Segments.
+ */
+
+ var StreamTypes$1 = streamTypes;
+ var parsePid = function (packet) {
+ var pid = packet[1] & 0x1f;
+ pid <<= 8;
+ pid |= packet[2];
+ return pid;
+ };
+ var parsePayloadUnitStartIndicator = function (packet) {
+ return !!(packet[1] & 0x40);
+ };
+ var parseAdaptionField = function (packet) {
+ var offset = 0; // if an adaption field is present, its length is specified by the
+ // fifth byte of the TS packet header. The adaptation field is
+ // used to add stuffing to PES packets that don't fill a complete
+ // TS packet, and to specify some forms of timing and control data
+ // that we do not currently use.
+
+ if ((packet[3] & 0x30) >>> 4 > 0x01) {
+ offset += packet[4] + 1;
+ }
+ return offset;
+ };
+ var parseType = function (packet, pmtPid) {
+ var pid = parsePid(packet);
+ if (pid === 0) {
+ return 'pat';
+ } else if (pid === pmtPid) {
+ return 'pmt';
+ } else if (pmtPid) {
+ return 'pes';
+ }
+ return null;
+ };
+ var parsePat = function (packet) {
+ var pusi = parsePayloadUnitStartIndicator(packet);
+ var offset = 4 + parseAdaptionField(packet);
+ if (pusi) {
+ offset += packet[offset] + 1;
+ }
+ return (packet[offset + 10] & 0x1f) << 8 | packet[offset + 11];
+ };
+ var parsePmt = function (packet) {
+ var programMapTable = {};
+ var pusi = parsePayloadUnitStartIndicator(packet);
+ var payloadOffset = 4 + parseAdaptionField(packet);
+ if (pusi) {
+ payloadOffset += packet[payloadOffset] + 1;
+ } // PMTs can be sent ahead of the time when they should actually
+ // take effect. We don't believe this should ever be the case
+ // for HLS but we'll ignore "forward" PMT declarations if we see
+ // them. Future PMT declarations have the current_next_indicator
+ // set to zero.
+
+ if (!(packet[payloadOffset + 5] & 0x01)) {
+ return;
+ }
+ var sectionLength, tableEnd, programInfoLength; // the mapping table ends at the end of the current section
+
+ sectionLength = (packet[payloadOffset + 1] & 0x0f) << 8 | packet[payloadOffset + 2];
+ tableEnd = 3 + sectionLength - 4; // to determine where the table is, we have to figure out how
+ // long the program info descriptors are
+
+ programInfoLength = (packet[payloadOffset + 10] & 0x0f) << 8 | packet[payloadOffset + 11]; // advance the offset to the first entry in the mapping table
+
+ var offset = 12 + programInfoLength;
+ while (offset < tableEnd) {
+ var i = payloadOffset + offset; // add an entry that maps the elementary_pid to the stream_type
+
+ programMapTable[(packet[i + 1] & 0x1F) << 8 | packet[i + 2]] = packet[i]; // move to the next table entry
+ // skip past the elementary stream descriptors, if present
+
+ offset += ((packet[i + 3] & 0x0F) << 8 | packet[i + 4]) + 5;
+ }
+ return programMapTable;
+ };
+ var parsePesType = function (packet, programMapTable) {
+ var pid = parsePid(packet);
+ var type = programMapTable[pid];
+ switch (type) {
+ case StreamTypes$1.H264_STREAM_TYPE:
+ return 'video';
+ case StreamTypes$1.ADTS_STREAM_TYPE:
+ return 'audio';
+ case StreamTypes$1.METADATA_STREAM_TYPE:
+ return 'timed-metadata';
+ default:
+ return null;
+ }
+ };
+ var parsePesTime = function (packet) {
+ var pusi = parsePayloadUnitStartIndicator(packet);
+ if (!pusi) {
+ return null;
+ }
+ var offset = 4 + parseAdaptionField(packet);
+ if (offset >= packet.byteLength) {
+ // From the H 222.0 MPEG-TS spec
+ // "For transport stream packets carrying PES packets, stuffing is needed when there
+ // is insufficient PES packet data to completely fill the transport stream packet
+ // payload bytes. Stuffing is accomplished by defining an adaptation field longer than
+ // the sum of the lengths of the data elements in it, so that the payload bytes
+ // remaining after the adaptation field exactly accommodates the available PES packet
+ // data."
+ //
+ // If the offset is >= the length of the packet, then the packet contains no data
+ // and instead is just adaption field stuffing bytes
+ return null;
+ }
+ var pes = null;
+ var ptsDtsFlags; // PES packets may be annotated with a PTS value, or a PTS value
+ // and a DTS value. Determine what combination of values is
+ // available to work with.
+
+ ptsDtsFlags = packet[offset + 7]; // PTS and DTS are normally stored as a 33-bit number. Javascript
+ // performs all bitwise operations on 32-bit integers but javascript
+ // supports a much greater range (52-bits) of integer using standard
+ // mathematical operations.
+ // We construct a 31-bit value using bitwise operators over the 31
+ // most significant bits and then multiply by 4 (equal to a left-shift
+ // of 2) before we add the final 2 least significant bits of the
+ // timestamp (equal to an OR.)
+
+ if (ptsDtsFlags & 0xC0) {
+ pes = {}; // the PTS and DTS are not written out directly. For information
+ // on how they are encoded, see
+ // http://dvd.sourceforge.net/dvdinfo/pes-hdr.html
+
+ pes.pts = (packet[offset + 9] & 0x0E) << 27 | (packet[offset + 10] & 0xFF) << 20 | (packet[offset + 11] & 0xFE) << 12 | (packet[offset + 12] & 0xFF) << 5 | (packet[offset + 13] & 0xFE) >>> 3;
+ pes.pts *= 4; // Left shift by 2
+
+ pes.pts += (packet[offset + 13] & 0x06) >>> 1; // OR by the two LSBs
+
+ pes.dts = pes.pts;
+ if (ptsDtsFlags & 0x40) {
+ pes.dts = (packet[offset + 14] & 0x0E) << 27 | (packet[offset + 15] & 0xFF) << 20 | (packet[offset + 16] & 0xFE) << 12 | (packet[offset + 17] & 0xFF) << 5 | (packet[offset + 18] & 0xFE) >>> 3;
+ pes.dts *= 4; // Left shift by 2
+
+ pes.dts += (packet[offset + 18] & 0x06) >>> 1; // OR by the two LSBs
+ }
+ }
+
+ return pes;
+ };
+ var parseNalUnitType = function (type) {
+ switch (type) {
+ case 0x05:
+ return 'slice_layer_without_partitioning_rbsp_idr';
+ case 0x06:
+ return 'sei_rbsp';
+ case 0x07:
+ return 'seq_parameter_set_rbsp';
+ case 0x08:
+ return 'pic_parameter_set_rbsp';
+ case 0x09:
+ return 'access_unit_delimiter_rbsp';
+ default:
+ return null;
+ }
+ };
+ var videoPacketContainsKeyFrame = function (packet) {
+ var offset = 4 + parseAdaptionField(packet);
+ var frameBuffer = packet.subarray(offset);
+ var frameI = 0;
+ var frameSyncPoint = 0;
+ var foundKeyFrame = false;
+ var nalType; // advance the sync point to a NAL start, if necessary
+
+ for (; frameSyncPoint < frameBuffer.byteLength - 3; frameSyncPoint++) {
+ if (frameBuffer[frameSyncPoint + 2] === 1) {
+ // the sync point is properly aligned
+ frameI = frameSyncPoint + 5;
+ break;
+ }
+ }
+ while (frameI < frameBuffer.byteLength) {
+ // look at the current byte to determine if we've hit the end of
+ // a NAL unit boundary
+ switch (frameBuffer[frameI]) {
+ case 0:
+ // skip past non-sync sequences
+ if (frameBuffer[frameI - 1] !== 0) {
+ frameI += 2;
+ break;
+ } else if (frameBuffer[frameI - 2] !== 0) {
+ frameI++;
+ break;
+ }
+ if (frameSyncPoint + 3 !== frameI - 2) {
+ nalType = parseNalUnitType(frameBuffer[frameSyncPoint + 3] & 0x1f);
+ if (nalType === 'slice_layer_without_partitioning_rbsp_idr') {
+ foundKeyFrame = true;
+ }
+ } // drop trailing zeroes
+
+ do {
+ frameI++;
+ } while (frameBuffer[frameI] !== 1 && frameI < frameBuffer.length);
+ frameSyncPoint = frameI - 2;
+ frameI += 3;
+ break;
+ case 1:
+ // skip past non-sync sequences
+ if (frameBuffer[frameI - 1] !== 0 || frameBuffer[frameI - 2] !== 0) {
+ frameI += 3;
+ break;
+ }
+ nalType = parseNalUnitType(frameBuffer[frameSyncPoint + 3] & 0x1f);
+ if (nalType === 'slice_layer_without_partitioning_rbsp_idr') {
+ foundKeyFrame = true;
+ }
+ frameSyncPoint = frameI - 2;
+ frameI += 3;
+ break;
+ default:
+ // the current byte isn't a one or zero, so it cannot be part
+ // of a sync sequence
+ frameI += 3;
+ break;
+ }
+ }
+ frameBuffer = frameBuffer.subarray(frameSyncPoint);
+ frameI -= frameSyncPoint;
+ frameSyncPoint = 0; // parse the final nal
+
+ if (frameBuffer && frameBuffer.byteLength > 3) {
+ nalType = parseNalUnitType(frameBuffer[frameSyncPoint + 3] & 0x1f);
+ if (nalType === 'slice_layer_without_partitioning_rbsp_idr') {
+ foundKeyFrame = true;
+ }
+ }
+ return foundKeyFrame;
+ };
+ var probe$1 = {
+ parseType: parseType,
+ parsePat: parsePat,
+ parsePmt: parsePmt,
+ parsePayloadUnitStartIndicator: parsePayloadUnitStartIndicator,
+ parsePesType: parsePesType,
+ parsePesTime: parsePesTime,
+ videoPacketContainsKeyFrame: videoPacketContainsKeyFrame
+ };
+ /**
+ * mux.js
+ *
+ * Copyright (c) Brightcove
+ * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
+ *
+ * Parse mpeg2 transport stream packets to extract basic timing information
+ */
+
+ var StreamTypes = streamTypes;
+ var handleRollover = timestampRolloverStream.handleRollover;
+ var probe = {};
+ probe.ts = probe$1;
+ probe.aac = utils;
+ var ONE_SECOND_IN_TS = clock$2.ONE_SECOND_IN_TS;
+ var MP2T_PACKET_LENGTH = 188,
+ // bytes
+ SYNC_BYTE = 0x47;
+ /**
+ * walks through segment data looking for pat and pmt packets to parse out
+ * program map table information
+ */
+
+ var parsePsi_ = function (bytes, pmt) {
+ var startIndex = 0,
+ endIndex = MP2T_PACKET_LENGTH,
+ packet,
+ type;
+ while (endIndex < bytes.byteLength) {
+ // Look for a pair of start and end sync bytes in the data..
+ if (bytes[startIndex] === SYNC_BYTE && bytes[endIndex] === SYNC_BYTE) {
+ // We found a packet
+ packet = bytes.subarray(startIndex, endIndex);
+ type = probe.ts.parseType(packet, pmt.pid);
+ switch (type) {
+ case 'pat':
+ pmt.pid = probe.ts.parsePat(packet);
+ break;
+ case 'pmt':
+ var table = probe.ts.parsePmt(packet);
+ pmt.table = pmt.table || {};
+ Object.keys(table).forEach(function (key) {
+ pmt.table[key] = table[key];
+ });
+ break;
+ }
+ startIndex += MP2T_PACKET_LENGTH;
+ endIndex += MP2T_PACKET_LENGTH;
+ continue;
+ } // If we get here, we have somehow become de-synchronized and we need to step
+ // forward one byte at a time until we find a pair of sync bytes that denote
+ // a packet
+
+ startIndex++;
+ endIndex++;
+ }
+ };
+ /**
+ * walks through the segment data from the start and end to get timing information
+ * for the first and last audio pes packets
+ */
+
+ var parseAudioPes_ = function (bytes, pmt, result) {
+ var startIndex = 0,
+ endIndex = MP2T_PACKET_LENGTH,
+ packet,
+ type,
+ pesType,
+ pusi,
+ parsed;
+ var endLoop = false; // Start walking from start of segment to get first audio packet
+
+ while (endIndex <= bytes.byteLength) {
+ // Look for a pair of start and end sync bytes in the data..
+ if (bytes[startIndex] === SYNC_BYTE && (bytes[endIndex] === SYNC_BYTE || endIndex === bytes.byteLength)) {
+ // We found a packet
+ packet = bytes.subarray(startIndex, endIndex);
+ type = probe.ts.parseType(packet, pmt.pid);
+ switch (type) {
+ case 'pes':
+ pesType = probe.ts.parsePesType(packet, pmt.table);
+ pusi = probe.ts.parsePayloadUnitStartIndicator(packet);
+ if (pesType === 'audio' && pusi) {
+ parsed = probe.ts.parsePesTime(packet);
+ if (parsed) {
+ parsed.type = 'audio';
+ result.audio.push(parsed);
+ endLoop = true;
+ }
+ }
+ break;
+ }
+ if (endLoop) {
+ break;
+ }
+ startIndex += MP2T_PACKET_LENGTH;
+ endIndex += MP2T_PACKET_LENGTH;
+ continue;
+ } // If we get here, we have somehow become de-synchronized and we need to step
+ // forward one byte at a time until we find a pair of sync bytes that denote
+ // a packet
+
+ startIndex++;
+ endIndex++;
+ } // Start walking from end of segment to get last audio packet
+
+ endIndex = bytes.byteLength;
+ startIndex = endIndex - MP2T_PACKET_LENGTH;
+ endLoop = false;
+ while (startIndex >= 0) {
+ // Look for a pair of start and end sync bytes in the data..
+ if (bytes[startIndex] === SYNC_BYTE && (bytes[endIndex] === SYNC_BYTE || endIndex === bytes.byteLength)) {
+ // We found a packet
+ packet = bytes.subarray(startIndex, endIndex);
+ type = probe.ts.parseType(packet, pmt.pid);
+ switch (type) {
+ case 'pes':
+ pesType = probe.ts.parsePesType(packet, pmt.table);
+ pusi = probe.ts.parsePayloadUnitStartIndicator(packet);
+ if (pesType === 'audio' && pusi) {
+ parsed = probe.ts.parsePesTime(packet);
+ if (parsed) {
+ parsed.type = 'audio';
+ result.audio.push(parsed);
+ endLoop = true;
+ }
+ }
+ break;
+ }
+ if (endLoop) {
+ break;
+ }
+ startIndex -= MP2T_PACKET_LENGTH;
+ endIndex -= MP2T_PACKET_LENGTH;
+ continue;
+ } // If we get here, we have somehow become de-synchronized and we need to step
+ // forward one byte at a time until we find a pair of sync bytes that denote
+ // a packet
+
+ startIndex--;
+ endIndex--;
+ }
+ };
+ /**
+ * walks through the segment data from the start and end to get timing information
+ * for the first and last video pes packets as well as timing information for the first
+ * key frame.
+ */
+
+ var parseVideoPes_ = function (bytes, pmt, result) {
+ var startIndex = 0,
+ endIndex = MP2T_PACKET_LENGTH,
+ packet,
+ type,
+ pesType,
+ pusi,
+ parsed,
+ frame,
+ i,
+ pes;
+ var endLoop = false;
+ var currentFrame = {
+ data: [],
+ size: 0
+ }; // Start walking from start of segment to get first video packet
+
+ while (endIndex < bytes.byteLength) {
+ // Look for a pair of start and end sync bytes in the data..
+ if (bytes[startIndex] === SYNC_BYTE && bytes[endIndex] === SYNC_BYTE) {
+ // We found a packet
+ packet = bytes.subarray(startIndex, endIndex);
+ type = probe.ts.parseType(packet, pmt.pid);
+ switch (type) {
+ case 'pes':
+ pesType = probe.ts.parsePesType(packet, pmt.table);
+ pusi = probe.ts.parsePayloadUnitStartIndicator(packet);
+ if (pesType === 'video') {
+ if (pusi && !endLoop) {
+ parsed = probe.ts.parsePesTime(packet);
+ if (parsed) {
+ parsed.type = 'video';
+ result.video.push(parsed);
+ endLoop = true;
+ }
+ }
+ if (!result.firstKeyFrame) {
+ if (pusi) {
+ if (currentFrame.size !== 0) {
+ frame = new Uint8Array(currentFrame.size);
+ i = 0;
+ while (currentFrame.data.length) {
+ pes = currentFrame.data.shift();
+ frame.set(pes, i);
+ i += pes.byteLength;
+ }
+ if (probe.ts.videoPacketContainsKeyFrame(frame)) {
+ var firstKeyFrame = probe.ts.parsePesTime(frame); // PTS/DTS may not be available. Simply *not* setting
+ // the keyframe seems to work fine with HLS playback
+ // and definitely preferable to a crash with TypeError...
+
+ if (firstKeyFrame) {
+ result.firstKeyFrame = firstKeyFrame;
+ result.firstKeyFrame.type = 'video';
+ } else {
+ // eslint-disable-next-line
+ console.warn('Failed to extract PTS/DTS from PES at first keyframe. ' + 'This could be an unusual TS segment, or else mux.js did not ' + 'parse your TS segment correctly. If you know your TS ' + 'segments do contain PTS/DTS on keyframes please file a bug ' + 'report! You can try ffprobe to double check for yourself.');
+ }
+ }
+ currentFrame.size = 0;
+ }
+ }
+ currentFrame.data.push(packet);
+ currentFrame.size += packet.byteLength;
+ }
+ }
+ break;
+ }
+ if (endLoop && result.firstKeyFrame) {
+ break;
+ }
+ startIndex += MP2T_PACKET_LENGTH;
+ endIndex += MP2T_PACKET_LENGTH;
+ continue;
+ } // If we get here, we have somehow become de-synchronized and we need to step
+ // forward one byte at a time until we find a pair of sync bytes that denote
+ // a packet
+
+ startIndex++;
+ endIndex++;
+ } // Start walking from end of segment to get last video packet
+
+ endIndex = bytes.byteLength;
+ startIndex = endIndex - MP2T_PACKET_LENGTH;
+ endLoop = false;
+ while (startIndex >= 0) {
+ // Look for a pair of start and end sync bytes in the data..
+ if (bytes[startIndex] === SYNC_BYTE && bytes[endIndex] === SYNC_BYTE) {
+ // We found a packet
+ packet = bytes.subarray(startIndex, endIndex);
+ type = probe.ts.parseType(packet, pmt.pid);
+ switch (type) {
+ case 'pes':
+ pesType = probe.ts.parsePesType(packet, pmt.table);
+ pusi = probe.ts.parsePayloadUnitStartIndicator(packet);
+ if (pesType === 'video' && pusi) {
+ parsed = probe.ts.parsePesTime(packet);
+ if (parsed) {
+ parsed.type = 'video';
+ result.video.push(parsed);
+ endLoop = true;
+ }
+ }
+ break;
+ }
+ if (endLoop) {
+ break;
+ }
+ startIndex -= MP2T_PACKET_LENGTH;
+ endIndex -= MP2T_PACKET_LENGTH;
+ continue;
+ } // If we get here, we have somehow become de-synchronized and we need to step
+ // forward one byte at a time until we find a pair of sync bytes that denote
+ // a packet
+
+ startIndex--;
+ endIndex--;
+ }
+ };
+ /**
+ * Adjusts the timestamp information for the segment to account for
+ * rollover and convert to seconds based on pes packet timescale (90khz clock)
+ */
+
+ var adjustTimestamp_ = function (segmentInfo, baseTimestamp) {
+ if (segmentInfo.audio && segmentInfo.audio.length) {
+ var audioBaseTimestamp = baseTimestamp;
+ if (typeof audioBaseTimestamp === 'undefined' || isNaN(audioBaseTimestamp)) {
+ audioBaseTimestamp = segmentInfo.audio[0].dts;
+ }
+ segmentInfo.audio.forEach(function (info) {
+ info.dts = handleRollover(info.dts, audioBaseTimestamp);
+ info.pts = handleRollover(info.pts, audioBaseTimestamp); // time in seconds
+
+ info.dtsTime = info.dts / ONE_SECOND_IN_TS;
+ info.ptsTime = info.pts / ONE_SECOND_IN_TS;
+ });
+ }
+ if (segmentInfo.video && segmentInfo.video.length) {
+ var videoBaseTimestamp = baseTimestamp;
+ if (typeof videoBaseTimestamp === 'undefined' || isNaN(videoBaseTimestamp)) {
+ videoBaseTimestamp = segmentInfo.video[0].dts;
+ }
+ segmentInfo.video.forEach(function (info) {
+ info.dts = handleRollover(info.dts, videoBaseTimestamp);
+ info.pts = handleRollover(info.pts, videoBaseTimestamp); // time in seconds
+
+ info.dtsTime = info.dts / ONE_SECOND_IN_TS;
+ info.ptsTime = info.pts / ONE_SECOND_IN_TS;
+ });
+ if (segmentInfo.firstKeyFrame) {
+ var frame = segmentInfo.firstKeyFrame;
+ frame.dts = handleRollover(frame.dts, videoBaseTimestamp);
+ frame.pts = handleRollover(frame.pts, videoBaseTimestamp); // time in seconds
+
+ frame.dtsTime = frame.dts / ONE_SECOND_IN_TS;
+ frame.ptsTime = frame.pts / ONE_SECOND_IN_TS;
+ }
+ }
+ };
+ /**
+ * inspects the aac data stream for start and end time information
+ */
+
+ var inspectAac_ = function (bytes) {
+ var endLoop = false,
+ audioCount = 0,
+ sampleRate = null,
+ timestamp = null,
+ frameSize = 0,
+ byteIndex = 0,
+ packet;
+ while (bytes.length - byteIndex >= 3) {
+ var type = probe.aac.parseType(bytes, byteIndex);
+ switch (type) {
+ case 'timed-metadata':
+ // Exit early because we don't have enough to parse
+ // the ID3 tag header
+ if (bytes.length - byteIndex < 10) {
+ endLoop = true;
+ break;
+ }
+ frameSize = probe.aac.parseId3TagSize(bytes, byteIndex); // Exit early if we don't have enough in the buffer
+ // to emit a full packet
+
+ if (frameSize > bytes.length) {
+ endLoop = true;
+ break;
+ }
+ if (timestamp === null) {
+ packet = bytes.subarray(byteIndex, byteIndex + frameSize);
+ timestamp = probe.aac.parseAacTimestamp(packet);
+ }
+ byteIndex += frameSize;
+ break;
+ case 'audio':
+ // Exit early because we don't have enough to parse
+ // the ADTS frame header
+ if (bytes.length - byteIndex < 7) {
+ endLoop = true;
+ break;
+ }
+ frameSize = probe.aac.parseAdtsSize(bytes, byteIndex); // Exit early if we don't have enough in the buffer
+ // to emit a full packet
+
+ if (frameSize > bytes.length) {
+ endLoop = true;
+ break;
+ }
+ if (sampleRate === null) {
+ packet = bytes.subarray(byteIndex, byteIndex + frameSize);
+ sampleRate = probe.aac.parseSampleRate(packet);
+ }
+ audioCount++;
+ byteIndex += frameSize;
+ break;
+ default:
+ byteIndex++;
+ break;
+ }
+ if (endLoop) {
+ return null;
+ }
+ }
+ if (sampleRate === null || timestamp === null) {
+ return null;
+ }
+ var audioTimescale = ONE_SECOND_IN_TS / sampleRate;
+ var result = {
+ audio: [{
+ type: 'audio',
+ dts: timestamp,
+ pts: timestamp
+ }, {
+ type: 'audio',
+ dts: timestamp + audioCount * 1024 * audioTimescale,
+ pts: timestamp + audioCount * 1024 * audioTimescale
+ }]
+ };
+ return result;
+ };
+ /**
+ * inspects the transport stream segment data for start and end time information
+ * of the audio and video tracks (when present) as well as the first key frame's
+ * start time.
+ */
+
+ var inspectTs_ = function (bytes) {
+ var pmt = {
+ pid: null,
+ table: null
+ };
+ var result = {};
+ parsePsi_(bytes, pmt);
+ for (var pid in pmt.table) {
+ if (pmt.table.hasOwnProperty(pid)) {
+ var type = pmt.table[pid];
+ switch (type) {
+ case StreamTypes.H264_STREAM_TYPE:
+ result.video = [];
+ parseVideoPes_(bytes, pmt, result);
+ if (result.video.length === 0) {
+ delete result.video;
+ }
+ break;
+ case StreamTypes.ADTS_STREAM_TYPE:
+ result.audio = [];
+ parseAudioPes_(bytes, pmt, result);
+ if (result.audio.length === 0) {
+ delete result.audio;
+ }
+ break;
+ }
+ }
+ }
+ return result;
+ };
+ /**
+ * Inspects segment byte data and returns an object with start and end timing information
+ *
+ * @param {Uint8Array} bytes The segment byte data
+ * @param {Number} baseTimestamp Relative reference timestamp used when adjusting frame
+ * timestamps for rollover. This value must be in 90khz clock.
+ * @return {Object} Object containing start and end frame timing info of segment.
+ */
+
+ var inspect = function (bytes, baseTimestamp) {
+ var isAacData = probe.aac.isLikelyAacData(bytes);
+ var result;
+ if (isAacData) {
+ result = inspectAac_(bytes);
+ } else {
+ result = inspectTs_(bytes);
+ }
+ if (!result || !result.audio && !result.video) {
+ return null;
+ }
+ adjustTimestamp_(result, baseTimestamp);
+ return result;
+ };
+ var tsInspector = {
+ inspect: inspect,
+ parseAudioPes_: parseAudioPes_
+ };
+ /* global self */
+
+ /**
+ * Re-emits transmuxer events by converting them into messages to the
+ * world outside the worker.
+ *
+ * @param {Object} transmuxer the transmuxer to wire events on
+ * @private
+ */
+
+ const wireTransmuxerEvents = function (self, transmuxer) {
+ transmuxer.on('data', function (segment) {
+ // transfer ownership of the underlying ArrayBuffer
+ // instead of doing a copy to save memory
+ // ArrayBuffers are transferable but generic TypedArrays are not
+ // @link https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Using_web_workers#Passing_data_by_transferring_ownership_(transferable_objects)
+ const initArray = segment.initSegment;
+ segment.initSegment = {
+ data: initArray.buffer,
+ byteOffset: initArray.byteOffset,
+ byteLength: initArray.byteLength
+ };
+ const typedArray = segment.data;
+ segment.data = typedArray.buffer;
+ self.postMessage({
+ action: 'data',
+ segment,
+ byteOffset: typedArray.byteOffset,
+ byteLength: typedArray.byteLength
+ }, [segment.data]);
+ });
+ transmuxer.on('done', function (data) {
+ self.postMessage({
+ action: 'done'
+ });
+ });
+ transmuxer.on('gopInfo', function (gopInfo) {
+ self.postMessage({
+ action: 'gopInfo',
+ gopInfo
+ });
+ });
+ transmuxer.on('videoSegmentTimingInfo', function (timingInfo) {
+ const videoSegmentTimingInfo = {
+ start: {
+ decode: clock$2.videoTsToSeconds(timingInfo.start.dts),
+ presentation: clock$2.videoTsToSeconds(timingInfo.start.pts)
+ },
+ end: {
+ decode: clock$2.videoTsToSeconds(timingInfo.end.dts),
+ presentation: clock$2.videoTsToSeconds(timingInfo.end.pts)
+ },
+ baseMediaDecodeTime: clock$2.videoTsToSeconds(timingInfo.baseMediaDecodeTime)
+ };
+ if (timingInfo.prependedContentDuration) {
+ videoSegmentTimingInfo.prependedContentDuration = clock$2.videoTsToSeconds(timingInfo.prependedContentDuration);
+ }
+ self.postMessage({
+ action: 'videoSegmentTimingInfo',
+ videoSegmentTimingInfo
+ });
+ });
+ transmuxer.on('audioSegmentTimingInfo', function (timingInfo) {
+ // Note that all times for [audio/video]SegmentTimingInfo events are in video clock
+ const audioSegmentTimingInfo = {
+ start: {
+ decode: clock$2.videoTsToSeconds(timingInfo.start.dts),
+ presentation: clock$2.videoTsToSeconds(timingInfo.start.pts)
+ },
+ end: {
+ decode: clock$2.videoTsToSeconds(timingInfo.end.dts),
+ presentation: clock$2.videoTsToSeconds(timingInfo.end.pts)
+ },
+ baseMediaDecodeTime: clock$2.videoTsToSeconds(timingInfo.baseMediaDecodeTime)
+ };
+ if (timingInfo.prependedContentDuration) {
+ audioSegmentTimingInfo.prependedContentDuration = clock$2.videoTsToSeconds(timingInfo.prependedContentDuration);
+ }
+ self.postMessage({
+ action: 'audioSegmentTimingInfo',
+ audioSegmentTimingInfo
+ });
+ });
+ transmuxer.on('id3Frame', function (id3Frame) {
+ self.postMessage({
+ action: 'id3Frame',
+ id3Frame
+ });
+ });
+ transmuxer.on('caption', function (caption) {
+ self.postMessage({
+ action: 'caption',
+ caption
+ });
+ });
+ transmuxer.on('trackinfo', function (trackInfo) {
+ self.postMessage({
+ action: 'trackinfo',
+ trackInfo
+ });
+ });
+ transmuxer.on('audioTimingInfo', function (audioTimingInfo) {
+ // convert to video TS since we prioritize video time over audio
+ self.postMessage({
+ action: 'audioTimingInfo',
+ audioTimingInfo: {
+ start: clock$2.videoTsToSeconds(audioTimingInfo.start),
+ end: clock$2.videoTsToSeconds(audioTimingInfo.end)
+ }
+ });
+ });
+ transmuxer.on('videoTimingInfo', function (videoTimingInfo) {
+ self.postMessage({
+ action: 'videoTimingInfo',
+ videoTimingInfo: {
+ start: clock$2.videoTsToSeconds(videoTimingInfo.start),
+ end: clock$2.videoTsToSeconds(videoTimingInfo.end)
+ }
+ });
+ });
+ transmuxer.on('log', function (log) {
+ self.postMessage({
+ action: 'log',
+ log
+ });
+ });
+ };
+ /**
+ * All incoming messages route through this hash. If no function exists
+ * to handle an incoming message, then we ignore the message.
+ *
+ * @class MessageHandlers
+ * @param {Object} options the options to initialize with
+ */
+
+ class MessageHandlers {
+ constructor(self, options) {
+ this.options = options || {};
+ this.self = self;
+ this.init();
+ }
+ /**
+ * initialize our web worker and wire all the events.
+ */
+
+ init() {
+ if (this.transmuxer) {
+ this.transmuxer.dispose();
+ }
+ this.transmuxer = new transmuxer.Transmuxer(this.options);
+ wireTransmuxerEvents(this.self, this.transmuxer);
+ }
+ pushMp4Captions(data) {
+ if (!this.captionParser) {
+ this.captionParser = new captionParser();
+ this.captionParser.init();
+ }
+ const segment = new Uint8Array(data.data, data.byteOffset, data.byteLength);
+ const parsed = this.captionParser.parse(segment, data.trackIds, data.timescales);
+ this.self.postMessage({
+ action: 'mp4Captions',
+ captions: parsed && parsed.captions || [],
+ logs: parsed && parsed.logs || [],
+ data: segment.buffer
+ }, [segment.buffer]);
+ }
+ probeMp4StartTime({
+ timescales,
+ data
+ }) {
+ const startTime = probe$2.startTime(timescales, data);
+ this.self.postMessage({
+ action: 'probeMp4StartTime',
+ startTime,
+ data
+ }, [data.buffer]);
+ }
+ probeMp4Tracks({
+ data
+ }) {
+ const tracks = probe$2.tracks(data);
+ this.self.postMessage({
+ action: 'probeMp4Tracks',
+ tracks,
+ data
+ }, [data.buffer]);
+ }
+ /**
+ * Probes an mp4 segment for EMSG boxes containing ID3 data.
+ * https://aomediacodec.github.io/id3-emsg/
+ *
+ * @param {Uint8Array} data segment data
+ * @param {number} offset segment start time
+ * @return {Object[]} an array of ID3 frames
+ */
+
+ probeEmsgID3({
+ data,
+ offset
+ }) {
+ const id3Frames = probe$2.getEmsgID3(data, offset);
+ this.self.postMessage({
+ action: 'probeEmsgID3',
+ id3Frames,
+ emsgData: data
+ }, [data.buffer]);
+ }
+ /**
+ * Probe an mpeg2-ts segment to determine the start time of the segment in it's
+ * internal "media time," as well as whether it contains video and/or audio.
+ *
+ * @private
+ * @param {Uint8Array} bytes - segment bytes
+ * @param {number} baseStartTime
+ * Relative reference timestamp used when adjusting frame timestamps for rollover.
+ * This value should be in seconds, as it's converted to a 90khz clock within the
+ * function body.
+ * @return {Object} The start time of the current segment in "media time" as well as
+ * whether it contains video and/or audio
+ */
+
+ probeTs({
+ data,
+ baseStartTime
+ }) {
+ const tsStartTime = typeof baseStartTime === 'number' && !isNaN(baseStartTime) ? baseStartTime * clock$2.ONE_SECOND_IN_TS : void 0;
+ const timeInfo = tsInspector.inspect(data, tsStartTime);
+ let result = null;
+ if (timeInfo) {
+ result = {
+ // each type's time info comes back as an array of 2 times, start and end
+ hasVideo: timeInfo.video && timeInfo.video.length === 2 || false,
+ hasAudio: timeInfo.audio && timeInfo.audio.length === 2 || false
+ };
+ if (result.hasVideo) {
+ result.videoStart = timeInfo.video[0].ptsTime;
+ }
+ if (result.hasAudio) {
+ result.audioStart = timeInfo.audio[0].ptsTime;
+ }
+ }
+ this.self.postMessage({
+ action: 'probeTs',
+ result,
+ data
+ }, [data.buffer]);
+ }
+ clearAllMp4Captions() {
+ if (this.captionParser) {
+ this.captionParser.clearAllCaptions();
+ }
+ }
+ clearParsedMp4Captions() {
+ if (this.captionParser) {
+ this.captionParser.clearParsedCaptions();
+ }
+ }
+ /**
+ * Adds data (a ts segment) to the start of the transmuxer pipeline for
+ * processing.
+ *
+ * @param {ArrayBuffer} data data to push into the muxer
+ */
+
+ push(data) {
+ // Cast array buffer to correct type for transmuxer
+ const segment = new Uint8Array(data.data, data.byteOffset, data.byteLength);
+ this.transmuxer.push(segment);
+ }
+ /**
+ * Recreate the transmuxer so that the next segment added via `push`
+ * start with a fresh transmuxer.
+ */
+
+ reset() {
+ this.transmuxer.reset();
+ }
+ /**
+ * Set the value that will be used as the `baseMediaDecodeTime` time for the
+ * next segment pushed in. Subsequent segments will have their `baseMediaDecodeTime`
+ * set relative to the first based on the PTS values.
+ *
+ * @param {Object} data used to set the timestamp offset in the muxer
+ */
+
+ setTimestampOffset(data) {
+ const timestampOffset = data.timestampOffset || 0;
+ this.transmuxer.setBaseMediaDecodeTime(Math.round(clock$2.secondsToVideoTs(timestampOffset)));
+ }
+ setAudioAppendStart(data) {
+ this.transmuxer.setAudioAppendStart(Math.ceil(clock$2.secondsToVideoTs(data.appendStart)));
+ }
+ setRemux(data) {
+ this.transmuxer.setRemux(data.remux);
+ }
+ /**
+ * Forces the pipeline to finish processing the last segment and emit it's
+ * results.
+ *
+ * @param {Object} data event data, not really used
+ */
+
+ flush(data) {
+ this.transmuxer.flush(); // transmuxed done action is fired after both audio/video pipelines are flushed
+
+ self.postMessage({
+ action: 'done',
+ type: 'transmuxed'
+ });
+ }
+ endTimeline() {
+ this.transmuxer.endTimeline(); // transmuxed endedtimeline action is fired after both audio/video pipelines end their
+ // timelines
+
+ self.postMessage({
+ action: 'endedtimeline',
+ type: 'transmuxed'
+ });
+ }
+ alignGopsWith(data) {
+ this.transmuxer.alignGopsWith(data.gopsToAlignWith.slice());
+ }
+ }
+ /**
+ * Our web worker interface so that things can talk to mux.js
+ * that will be running in a web worker. the scope is passed to this by
+ * webworkify.
+ *
+ * @param {Object} self the scope for the web worker
+ */
+
+ self.onmessage = function (event) {
+ if (event.data.action === 'init' && event.data.options) {
+ this.messageHandlers = new MessageHandlers(self, event.data.options);
+ return;
+ }
+ if (!this.messageHandlers) {
+ this.messageHandlers = new MessageHandlers(self);
+ }
+ if (event.data && event.data.action && event.data.action !== 'init') {
+ if (this.messageHandlers[event.data.action]) {
+ this.messageHandlers[event.data.action](event.data);
+ }
+ }
+ };
+ }));
+ var TransmuxWorker = factory(workerCode$1);
+ /* rollup-plugin-worker-factory end for worker!/home/runner/work/http-streaming/http-streaming/src/transmuxer-worker.js */
+
+ const handleData_ = (event, transmuxedData, callback) => {
+ const {
+ type,
+ initSegment,
+ captions,
+ captionStreams,
+ metadata,
+ videoFrameDtsTime,
+ videoFramePtsTime
+ } = event.data.segment;
+ transmuxedData.buffer.push({
+ captions,
+ captionStreams,
+ metadata
+ });
+ const boxes = event.data.segment.boxes || {
+ data: event.data.segment.data
+ };
+ const result = {
+ type,
+ // cast ArrayBuffer to TypedArray
+ data: new Uint8Array(boxes.data, boxes.data.byteOffset, boxes.data.byteLength),
+ initSegment: new Uint8Array(initSegment.data, initSegment.byteOffset, initSegment.byteLength)
+ };
+ if (typeof videoFrameDtsTime !== 'undefined') {
+ result.videoFrameDtsTime = videoFrameDtsTime;
+ }
+ if (typeof videoFramePtsTime !== 'undefined') {
+ result.videoFramePtsTime = videoFramePtsTime;
+ }
+ callback(result);
+ };
+ const handleDone_ = ({
+ transmuxedData,
+ callback
+ }) => {
+ // Previously we only returned data on data events,
+ // not on done events. Clear out the buffer to keep that consistent.
+ transmuxedData.buffer = []; // all buffers should have been flushed from the muxer, so start processing anything we
+ // have received
+
+ callback(transmuxedData);
+ };
+ const handleGopInfo_ = (event, transmuxedData) => {
+ transmuxedData.gopInfo = event.data.gopInfo;
+ };
+ const processTransmux = options => {
+ const {
+ transmuxer,
+ bytes,
+ audioAppendStart,
+ gopsToAlignWith,
+ remux,
+ onData,
+ onTrackInfo,
+ onAudioTimingInfo,
+ onVideoTimingInfo,
+ onVideoSegmentTimingInfo,
+ onAudioSegmentTimingInfo,
+ onId3,
+ onCaptions,
+ onDone,
+ onEndedTimeline,
+ onTransmuxerLog,
+ isEndOfTimeline
+ } = options;
+ const transmuxedData = {
+ buffer: []
+ };
+ let waitForEndedTimelineEvent = isEndOfTimeline;
+ const handleMessage = event => {
+ if (transmuxer.currentTransmux !== options) {
+ // disposed
+ return;
+ }
+ if (event.data.action === 'data') {
+ handleData_(event, transmuxedData, onData);
+ }
+ if (event.data.action === 'trackinfo') {
+ onTrackInfo(event.data.trackInfo);
+ }
+ if (event.data.action === 'gopInfo') {
+ handleGopInfo_(event, transmuxedData);
+ }
+ if (event.data.action === 'audioTimingInfo') {
+ onAudioTimingInfo(event.data.audioTimingInfo);
+ }
+ if (event.data.action === 'videoTimingInfo') {
+ onVideoTimingInfo(event.data.videoTimingInfo);
+ }
+ if (event.data.action === 'videoSegmentTimingInfo') {
+ onVideoSegmentTimingInfo(event.data.videoSegmentTimingInfo);
+ }
+ if (event.data.action === 'audioSegmentTimingInfo') {
+ onAudioSegmentTimingInfo(event.data.audioSegmentTimingInfo);
+ }
+ if (event.data.action === 'id3Frame') {
+ onId3([event.data.id3Frame], event.data.id3Frame.dispatchType);
+ }
+ if (event.data.action === 'caption') {
+ onCaptions(event.data.caption);
+ }
+ if (event.data.action === 'endedtimeline') {
+ waitForEndedTimelineEvent = false;
+ onEndedTimeline();
+ }
+ if (event.data.action === 'log') {
+ onTransmuxerLog(event.data.log);
+ } // wait for the transmuxed event since we may have audio and video
+
+ if (event.data.type !== 'transmuxed') {
+ return;
+ } // If the "endedtimeline" event has not yet fired, and this segment represents the end
+ // of a timeline, that means there may still be data events before the segment
+ // processing can be considerred complete. In that case, the final event should be
+ // an "endedtimeline" event with the type "transmuxed."
+
+ if (waitForEndedTimelineEvent) {
+ return;
+ }
+ transmuxer.onmessage = null;
+ handleDone_({
+ transmuxedData,
+ callback: onDone
+ });
+ /* eslint-disable no-use-before-define */
+
+ dequeue(transmuxer);
+ /* eslint-enable */
+ };
+
+ transmuxer.onmessage = handleMessage;
+ if (audioAppendStart) {
+ transmuxer.postMessage({
+ action: 'setAudioAppendStart',
+ appendStart: audioAppendStart
+ });
+ } // allow empty arrays to be passed to clear out GOPs
+
+ if (Array.isArray(gopsToAlignWith)) {
+ transmuxer.postMessage({
+ action: 'alignGopsWith',
+ gopsToAlignWith
+ });
+ }
+ if (typeof remux !== 'undefined') {
+ transmuxer.postMessage({
+ action: 'setRemux',
+ remux
+ });
+ }
+ if (bytes.byteLength) {
+ const buffer = bytes instanceof ArrayBuffer ? bytes : bytes.buffer;
+ const byteOffset = bytes instanceof ArrayBuffer ? 0 : bytes.byteOffset;
+ transmuxer.postMessage({
+ action: 'push',
+ // Send the typed-array of data as an ArrayBuffer so that
+ // it can be sent as a "Transferable" and avoid the costly
+ // memory copy
+ data: buffer,
+ // To recreate the original typed-array, we need information
+ // about what portion of the ArrayBuffer it was a view into
+ byteOffset,
+ byteLength: bytes.byteLength
+ }, [buffer]);
+ }
+ if (isEndOfTimeline) {
+ transmuxer.postMessage({
+ action: 'endTimeline'
+ });
+ } // even if we didn't push any bytes, we have to make sure we flush in case we reached
+ // the end of the segment
+
+ transmuxer.postMessage({
+ action: 'flush'
+ });
+ };
+ const dequeue = transmuxer => {
+ transmuxer.currentTransmux = null;
+ if (transmuxer.transmuxQueue.length) {
+ transmuxer.currentTransmux = transmuxer.transmuxQueue.shift();
+ if (typeof transmuxer.currentTransmux === 'function') {
+ transmuxer.currentTransmux();
+ } else {
+ processTransmux(transmuxer.currentTransmux);
+ }
+ }
+ };
+ const processAction = (transmuxer, action) => {
+ transmuxer.postMessage({
+ action
+ });
+ dequeue(transmuxer);
+ };
+ const enqueueAction = (action, transmuxer) => {
+ if (!transmuxer.currentTransmux) {
+ transmuxer.currentTransmux = action;
+ processAction(transmuxer, action);
+ return;
+ }
+ transmuxer.transmuxQueue.push(processAction.bind(null, transmuxer, action));
+ };
+ const reset = transmuxer => {
+ enqueueAction('reset', transmuxer);
+ };
+ const endTimeline = transmuxer => {
+ enqueueAction('endTimeline', transmuxer);
+ };
+ const transmux = options => {
+ if (!options.transmuxer.currentTransmux) {
+ options.transmuxer.currentTransmux = options;
+ processTransmux(options);
+ return;
+ }
+ options.transmuxer.transmuxQueue.push(options);
+ };
+ const createTransmuxer = options => {
+ const transmuxer = new TransmuxWorker();
+ transmuxer.currentTransmux = null;
+ transmuxer.transmuxQueue = [];
+ const term = transmuxer.terminate;
+ transmuxer.terminate = () => {
+ transmuxer.currentTransmux = null;
+ transmuxer.transmuxQueue.length = 0;
+ return term.call(transmuxer);
+ };
+ transmuxer.postMessage({
+ action: 'init',
+ options
+ });
+ return transmuxer;
+ };
+ var segmentTransmuxer = {
+ reset,
+ endTimeline,
+ transmux,
+ createTransmuxer
+ };
+ const workerCallback = function (options) {
+ const transmuxer = options.transmuxer;
+ const endAction = options.endAction || options.action;
+ const callback = options.callback;
+ const message = _extends$1({}, options, {
+ endAction: null,
+ transmuxer: null,
+ callback: null
+ });
+ const listenForEndEvent = event => {
+ if (event.data.action !== endAction) {
+ return;
+ }
+ transmuxer.removeEventListener('message', listenForEndEvent); // transfer ownership of bytes back to us.
+
+ if (event.data.data) {
+ event.data.data = new Uint8Array(event.data.data, options.byteOffset || 0, options.byteLength || event.data.data.byteLength);
+ if (options.data) {
+ options.data = event.data.data;
+ }
+ }
+ callback(event.data);
+ };
+ transmuxer.addEventListener('message', listenForEndEvent);
+ if (options.data) {
+ const isArrayBuffer = options.data instanceof ArrayBuffer;
+ message.byteOffset = isArrayBuffer ? 0 : options.data.byteOffset;
+ message.byteLength = options.data.byteLength;
+ const transfers = [isArrayBuffer ? options.data : options.data.buffer];
+ transmuxer.postMessage(message, transfers);
+ } else {
+ transmuxer.postMessage(message);
+ }
+ };
+ const REQUEST_ERRORS = {
+ FAILURE: 2,
+ TIMEOUT: -101,
+ ABORTED: -102
+ };
+ /**
+ * Abort all requests
+ *
+ * @param {Object} activeXhrs - an object that tracks all XHR requests
+ */
+
+ const abortAll = activeXhrs => {
+ activeXhrs.forEach(xhr => {
+ xhr.abort();
+ });
+ };
+ /**
+ * Gather important bandwidth stats once a request has completed
+ *
+ * @param {Object} request - the XHR request from which to gather stats
+ */
+
+ const getRequestStats = request => {
+ return {
+ bandwidth: request.bandwidth,
+ bytesReceived: request.bytesReceived || 0,
+ roundTripTime: request.roundTripTime || 0
+ };
+ };
+ /**
+ * If possible gather bandwidth stats as a request is in
+ * progress
+ *
+ * @param {Event} progressEvent - an event object from an XHR's progress event
+ */
+
+ const getProgressStats = progressEvent => {
+ const request = progressEvent.target;
+ const roundTripTime = Date.now() - request.requestTime;
+ const stats = {
+ bandwidth: Infinity,
+ bytesReceived: 0,
+ roundTripTime: roundTripTime || 0
+ };
+ stats.bytesReceived = progressEvent.loaded; // This can result in Infinity if stats.roundTripTime is 0 but that is ok
+ // because we should only use bandwidth stats on progress to determine when
+ // abort a request early due to insufficient bandwidth
+
+ stats.bandwidth = Math.floor(stats.bytesReceived / stats.roundTripTime * 8 * 1000);
+ return stats;
+ };
+ /**
+ * Handle all error conditions in one place and return an object
+ * with all the information
+ *
+ * @param {Error|null} error - if non-null signals an error occured with the XHR
+ * @param {Object} request - the XHR request that possibly generated the error
+ */
+
+ const handleErrors = (error, request) => {
+ if (request.timedout) {
+ return {
+ status: request.status,
+ message: 'HLS request timed-out at URL: ' + request.uri,
+ code: REQUEST_ERRORS.TIMEOUT,
+ xhr: request
+ };
+ }
+ if (request.aborted) {
+ return {
+ status: request.status,
+ message: 'HLS request aborted at URL: ' + request.uri,
+ code: REQUEST_ERRORS.ABORTED,
+ xhr: request
+ };
+ }
+ if (error) {
+ return {
+ status: request.status,
+ message: 'HLS request errored at URL: ' + request.uri,
+ code: REQUEST_ERRORS.FAILURE,
+ xhr: request
+ };
+ }
+ if (request.responseType === 'arraybuffer' && request.response.byteLength === 0) {
+ return {
+ status: request.status,
+ message: 'Empty HLS response at URL: ' + request.uri,
+ code: REQUEST_ERRORS.FAILURE,
+ xhr: request
+ };
+ }
+ return null;
+ };
+ /**
+ * Handle responses for key data and convert the key data to the correct format
+ * for the decryption step later
+ *
+ * @param {Object} segment - a simplified copy of the segmentInfo object
+ * from SegmentLoader
+ * @param {Array} objects - objects to add the key bytes to.
+ * @param {Function} finishProcessingFn - a callback to execute to continue processing
+ * this request
+ */
+
+ const handleKeyResponse = (segment, objects, finishProcessingFn) => (error, request) => {
+ const response = request.response;
+ const errorObj = handleErrors(error, request);
+ if (errorObj) {
+ return finishProcessingFn(errorObj, segment);
+ }
+ if (response.byteLength !== 16) {
+ return finishProcessingFn({
+ status: request.status,
+ message: 'Invalid HLS key at URL: ' + request.uri,
+ code: REQUEST_ERRORS.FAILURE,
+ xhr: request
+ }, segment);
+ }
+ const view = new DataView(response);
+ const bytes = new Uint32Array([view.getUint32(0), view.getUint32(4), view.getUint32(8), view.getUint32(12)]);
+ for (let i = 0; i < objects.length; i++) {
+ objects[i].bytes = bytes;
+ }
+ return finishProcessingFn(null, segment);
+ };
+ const parseInitSegment = (segment, callback) => {
+ const type = detectContainerForBytes(segment.map.bytes); // TODO: We should also handle ts init segments here, but we
+ // only know how to parse mp4 init segments at the moment
+
+ if (type !== 'mp4') {
+ const uri = segment.map.resolvedUri || segment.map.uri;
+ const mediaType = type || 'unknown';
+ return callback({
+ internal: true,
+ message: `Found unsupported ${mediaType} container for initialization segment at URL: ${uri}`,
+ code: REQUEST_ERRORS.FAILURE,
+ metadata: {
+ errorType: videojs.Error.UnsupportedMediaInitialization,
+ mediaType
+ }
+ });
+ }
+ workerCallback({
+ action: 'probeMp4Tracks',
+ data: segment.map.bytes,
+ transmuxer: segment.transmuxer,
+ callback: ({
+ tracks,
+ data
+ }) => {
+ // transfer bytes back to us
+ segment.map.bytes = data;
+ tracks.forEach(function (track) {
+ segment.map.tracks = segment.map.tracks || {}; // only support one track of each type for now
+
+ if (segment.map.tracks[track.type]) {
+ return;
+ }
+ segment.map.tracks[track.type] = track;
+ if (typeof track.id === 'number' && track.timescale) {
+ segment.map.timescales = segment.map.timescales || {};
+ segment.map.timescales[track.id] = track.timescale;
+ }
+ });
+ return callback(null);
+ }
+ });
+ };
+ /**
+ * Handle init-segment responses
+ *
+ * @param {Object} segment - a simplified copy of the segmentInfo object
+ * from SegmentLoader
+ * @param {Function} finishProcessingFn - a callback to execute to continue processing
+ * this request
+ */
+
+ const handleInitSegmentResponse = ({
+ segment,
+ finishProcessingFn
+ }) => (error, request) => {
+ const errorObj = handleErrors(error, request);
+ if (errorObj) {
+ return finishProcessingFn(errorObj, segment);
+ }
+ const bytes = new Uint8Array(request.response); // init segment is encypted, we will have to wait
+ // until the key request is done to decrypt.
+
+ if (segment.map.key) {
+ segment.map.encryptedBytes = bytes;
+ return finishProcessingFn(null, segment);
+ }
+ segment.map.bytes = bytes;
+ parseInitSegment(segment, function (parseError) {
+ if (parseError) {
+ parseError.xhr = request;
+ parseError.status = request.status;
+ return finishProcessingFn(parseError, segment);
+ }
+ finishProcessingFn(null, segment);
+ });
+ };
+ /**
+ * Response handler for segment-requests being sure to set the correct
+ * property depending on whether the segment is encryped or not
+ * Also records and keeps track of stats that are used for ABR purposes
+ *
+ * @param {Object} segment - a simplified copy of the segmentInfo object
+ * from SegmentLoader
+ * @param {Function} finishProcessingFn - a callback to execute to continue processing
+ * this request
+ */
+
+ const handleSegmentResponse = ({
+ segment,
+ finishProcessingFn,
+ responseType
+ }) => (error, request) => {
+ const errorObj = handleErrors(error, request);
+ if (errorObj) {
+ return finishProcessingFn(errorObj, segment);
+ }
+ const newBytes =
+ // although responseText "should" exist, this guard serves to prevent an error being
+ // thrown for two primary cases:
+ // 1. the mime type override stops working, or is not implemented for a specific
+ // browser
+ // 2. when using mock XHR libraries like sinon that do not allow the override behavior
+ responseType === 'arraybuffer' || !request.responseText ? request.response : stringToArrayBuffer(request.responseText.substring(segment.lastReachedChar || 0));
+ segment.stats = getRequestStats(request);
+ if (segment.key) {
+ segment.encryptedBytes = new Uint8Array(newBytes);
+ } else {
+ segment.bytes = new Uint8Array(newBytes);
+ }
+ return finishProcessingFn(null, segment);
+ };
+ const transmuxAndNotify = ({
+ segment,
+ bytes,
+ trackInfoFn,
+ timingInfoFn,
+ videoSegmentTimingInfoFn,
+ audioSegmentTimingInfoFn,
+ id3Fn,
+ captionsFn,
+ isEndOfTimeline,
+ endedTimelineFn,
+ dataFn,
+ doneFn,
+ onTransmuxerLog
+ }) => {
+ const fmp4Tracks = segment.map && segment.map.tracks || {};
+ const isMuxed = Boolean(fmp4Tracks.audio && fmp4Tracks.video); // Keep references to each function so we can null them out after we're done with them.
+ // One reason for this is that in the case of full segments, we want to trust start
+ // times from the probe, rather than the transmuxer.
+
+ let audioStartFn = timingInfoFn.bind(null, segment, 'audio', 'start');
+ const audioEndFn = timingInfoFn.bind(null, segment, 'audio', 'end');
+ let videoStartFn = timingInfoFn.bind(null, segment, 'video', 'start');
+ const videoEndFn = timingInfoFn.bind(null, segment, 'video', 'end');
+ const finish = () => transmux({
+ bytes,
+ transmuxer: segment.transmuxer,
+ audioAppendStart: segment.audioAppendStart,
+ gopsToAlignWith: segment.gopsToAlignWith,
+ remux: isMuxed,
+ onData: result => {
+ result.type = result.type === 'combined' ? 'video' : result.type;
+ dataFn(segment, result);
+ },
+ onTrackInfo: trackInfo => {
+ if (trackInfoFn) {
+ if (isMuxed) {
+ trackInfo.isMuxed = true;
+ }
+ trackInfoFn(segment, trackInfo);
+ }
+ },
+ onAudioTimingInfo: audioTimingInfo => {
+ // we only want the first start value we encounter
+ if (audioStartFn && typeof audioTimingInfo.start !== 'undefined') {
+ audioStartFn(audioTimingInfo.start);
+ audioStartFn = null;
+ } // we want to continually update the end time
+
+ if (audioEndFn && typeof audioTimingInfo.end !== 'undefined') {
+ audioEndFn(audioTimingInfo.end);
+ }
+ },
+ onVideoTimingInfo: videoTimingInfo => {
+ // we only want the first start value we encounter
+ if (videoStartFn && typeof videoTimingInfo.start !== 'undefined') {
+ videoStartFn(videoTimingInfo.start);
+ videoStartFn = null;
+ } // we want to continually update the end time
+
+ if (videoEndFn && typeof videoTimingInfo.end !== 'undefined') {
+ videoEndFn(videoTimingInfo.end);
+ }
+ },
+ onVideoSegmentTimingInfo: videoSegmentTimingInfo => {
+ videoSegmentTimingInfoFn(videoSegmentTimingInfo);
+ },
+ onAudioSegmentTimingInfo: audioSegmentTimingInfo => {
+ audioSegmentTimingInfoFn(audioSegmentTimingInfo);
+ },
+ onId3: (id3Frames, dispatchType) => {
+ id3Fn(segment, id3Frames, dispatchType);
+ },
+ onCaptions: captions => {
+ captionsFn(segment, [captions]);
+ },
+ isEndOfTimeline,
+ onEndedTimeline: () => {
+ endedTimelineFn();
+ },
+ onTransmuxerLog,
+ onDone: result => {
+ if (!doneFn) {
+ return;
+ }
+ result.type = result.type === 'combined' ? 'video' : result.type;
+ doneFn(null, segment, result);
+ }
+ }); // In the transmuxer, we don't yet have the ability to extract a "proper" start time.
+ // Meaning cached frame data may corrupt our notion of where this segment
+ // really starts. To get around this, probe for the info needed.
+
+ workerCallback({
+ action: 'probeTs',
+ transmuxer: segment.transmuxer,
+ data: bytes,
+ baseStartTime: segment.baseStartTime,
+ callback: data => {
+ segment.bytes = bytes = data.data;
+ const probeResult = data.result;
+ if (probeResult) {
+ trackInfoFn(segment, {
+ hasAudio: probeResult.hasAudio,
+ hasVideo: probeResult.hasVideo,
+ isMuxed
+ });
+ trackInfoFn = null;
+ }
+ finish();
+ }
+ });
+ };
+ const handleSegmentBytes = ({
+ segment,
+ bytes,
+ trackInfoFn,
+ timingInfoFn,
+ videoSegmentTimingInfoFn,
+ audioSegmentTimingInfoFn,
+ id3Fn,
+ captionsFn,
+ isEndOfTimeline,
+ endedTimelineFn,
+ dataFn,
+ doneFn,
+ onTransmuxerLog
+ }) => {
+ let bytesAsUint8Array = new Uint8Array(bytes); // TODO:
+ // We should have a handler that fetches the number of bytes required
+ // to check if something is fmp4. This will allow us to save bandwidth
+ // because we can only exclude a playlist and abort requests
+ // by codec after trackinfo triggers.
+
+ if (isLikelyFmp4MediaSegment(bytesAsUint8Array)) {
+ segment.isFmp4 = true;
+ const {
+ tracks
+ } = segment.map;
+ const trackInfo = {
+ isFmp4: true,
+ hasVideo: !!tracks.video,
+ hasAudio: !!tracks.audio
+ }; // if we have a audio track, with a codec that is not set to
+ // encrypted audio
+
+ if (tracks.audio && tracks.audio.codec && tracks.audio.codec !== 'enca') {
+ trackInfo.audioCodec = tracks.audio.codec;
+ } // if we have a video track, with a codec that is not set to
+ // encrypted video
+
+ if (tracks.video && tracks.video.codec && tracks.video.codec !== 'encv') {
+ trackInfo.videoCodec = tracks.video.codec;
+ }
+ if (tracks.video && tracks.audio) {
+ trackInfo.isMuxed = true;
+ } // since we don't support appending fmp4 data on progress, we know we have the full
+ // segment here
+
+ trackInfoFn(segment, trackInfo); // The probe doesn't provide the segment end time, so only callback with the start
+ // time. The end time can be roughly calculated by the receiver using the duration.
+ //
+ // Note that the start time returned by the probe reflects the baseMediaDecodeTime, as
+ // that is the true start of the segment (where the playback engine should begin
+ // decoding).
+
+ const finishLoading = (captions, id3Frames) => {
+ // if the track still has audio at this point it is only possible
+ // for it to be audio only. See `tracks.video && tracks.audio` if statement
+ // above.
+ // we make sure to use segment.bytes here as that
+ dataFn(segment, {
+ data: bytesAsUint8Array,
+ type: trackInfo.hasAudio && !trackInfo.isMuxed ? 'audio' : 'video'
+ });
+ if (id3Frames && id3Frames.length) {
+ id3Fn(segment, id3Frames);
+ }
+ if (captions && captions.length) {
+ captionsFn(segment, captions);
+ }
+ doneFn(null, segment, {});
+ };
+ workerCallback({
+ action: 'probeMp4StartTime',
+ timescales: segment.map.timescales,
+ data: bytesAsUint8Array,
+ transmuxer: segment.transmuxer,
+ callback: ({
+ data,
+ startTime
+ }) => {
+ // transfer bytes back to us
+ bytes = data.buffer;
+ segment.bytes = bytesAsUint8Array = data;
+ if (trackInfo.hasAudio && !trackInfo.isMuxed) {
+ timingInfoFn(segment, 'audio', 'start', startTime);
+ }
+ if (trackInfo.hasVideo) {
+ timingInfoFn(segment, 'video', 'start', startTime);
+ }
+ workerCallback({
+ action: 'probeEmsgID3',
+ data: bytesAsUint8Array,
+ transmuxer: segment.transmuxer,
+ offset: startTime,
+ callback: ({
+ emsgData,
+ id3Frames
+ }) => {
+ // transfer bytes back to us
+ bytes = emsgData.buffer;
+ segment.bytes = bytesAsUint8Array = emsgData; // Run through the CaptionParser in case there are captions.
+ // Initialize CaptionParser if it hasn't been yet
+
+ if (!tracks.video || !emsgData.byteLength || !segment.transmuxer) {
+ finishLoading(undefined, id3Frames);
+ return;
+ }
+ workerCallback({
+ action: 'pushMp4Captions',
+ endAction: 'mp4Captions',
+ transmuxer: segment.transmuxer,
+ data: bytesAsUint8Array,
+ timescales: segment.map.timescales,
+ trackIds: [tracks.video.id],
+ callback: message => {
+ // transfer bytes back to us
+ bytes = message.data.buffer;
+ segment.bytes = bytesAsUint8Array = message.data;
+ message.logs.forEach(function (log) {
+ onTransmuxerLog(merge(log, {
+ stream: 'mp4CaptionParser'
+ }));
+ });
+ finishLoading(message.captions, id3Frames);
+ }
+ });
+ }
+ });
+ }
+ });
+ return;
+ } // VTT or other segments that don't need processing
+
+ if (!segment.transmuxer) {
+ doneFn(null, segment, {});
+ return;
+ }
+ if (typeof segment.container === 'undefined') {
+ segment.container = detectContainerForBytes(bytesAsUint8Array);
+ }
+ if (segment.container !== 'ts' && segment.container !== 'aac') {
+ trackInfoFn(segment, {
+ hasAudio: false,
+ hasVideo: false
+ });
+ doneFn(null, segment, {});
+ return;
+ } // ts or aac
+
+ transmuxAndNotify({
+ segment,
+ bytes,
+ trackInfoFn,
+ timingInfoFn,
+ videoSegmentTimingInfoFn,
+ audioSegmentTimingInfoFn,
+ id3Fn,
+ captionsFn,
+ isEndOfTimeline,
+ endedTimelineFn,
+ dataFn,
+ doneFn,
+ onTransmuxerLog
+ });
+ };
+ const decrypt = function ({
+ id,
+ key,
+ encryptedBytes,
+ decryptionWorker
+ }, callback) {
+ const decryptionHandler = event => {
+ if (event.data.source === id) {
+ decryptionWorker.removeEventListener('message', decryptionHandler);
+ const decrypted = event.data.decrypted;
+ callback(new Uint8Array(decrypted.bytes, decrypted.byteOffset, decrypted.byteLength));
+ }
+ };
+ decryptionWorker.addEventListener('message', decryptionHandler);
+ let keyBytes;
+ if (key.bytes.slice) {
+ keyBytes = key.bytes.slice();
+ } else {
+ keyBytes = new Uint32Array(Array.prototype.slice.call(key.bytes));
+ } // incrementally decrypt the bytes
+
+ decryptionWorker.postMessage(createTransferableMessage({
+ source: id,
+ encrypted: encryptedBytes,
+ key: keyBytes,
+ iv: key.iv
+ }), [encryptedBytes.buffer, keyBytes.buffer]);
+ };
+ /**
+ * Decrypt the segment via the decryption web worker
+ *
+ * @param {WebWorker} decryptionWorker - a WebWorker interface to AES-128 decryption
+ * routines
+ * @param {Object} segment - a simplified copy of the segmentInfo object
+ * from SegmentLoader
+ * @param {Function} trackInfoFn - a callback that receives track info
+ * @param {Function} timingInfoFn - a callback that receives timing info
+ * @param {Function} videoSegmentTimingInfoFn
+ * a callback that receives video timing info based on media times and
+ * any adjustments made by the transmuxer
+ * @param {Function} audioSegmentTimingInfoFn
+ * a callback that receives audio timing info based on media times and
+ * any adjustments made by the transmuxer
+ * @param {boolean} isEndOfTimeline
+ * true if this segment represents the last segment in a timeline
+ * @param {Function} endedTimelineFn
+ * a callback made when a timeline is ended, will only be called if
+ * isEndOfTimeline is true
+ * @param {Function} dataFn - a callback that is executed when segment bytes are available
+ * and ready to use
+ * @param {Function} doneFn - a callback that is executed after decryption has completed
+ */
+
+ const decryptSegment = ({
+ decryptionWorker,
+ segment,
+ trackInfoFn,
+ timingInfoFn,
+ videoSegmentTimingInfoFn,
+ audioSegmentTimingInfoFn,
+ id3Fn,
+ captionsFn,
+ isEndOfTimeline,
+ endedTimelineFn,
+ dataFn,
+ doneFn,
+ onTransmuxerLog
+ }) => {
+ decrypt({
+ id: segment.requestId,
+ key: segment.key,
+ encryptedBytes: segment.encryptedBytes,
+ decryptionWorker
+ }, decryptedBytes => {
+ segment.bytes = decryptedBytes;
+ handleSegmentBytes({
+ segment,
+ bytes: segment.bytes,
+ trackInfoFn,
+ timingInfoFn,
+ videoSegmentTimingInfoFn,
+ audioSegmentTimingInfoFn,
+ id3Fn,
+ captionsFn,
+ isEndOfTimeline,
+ endedTimelineFn,
+ dataFn,
+ doneFn,
+ onTransmuxerLog
+ });
+ });
+ };
+ /**
+ * This function waits for all XHRs to finish (with either success or failure)
+ * before continueing processing via it's callback. The function gathers errors
+ * from each request into a single errors array so that the error status for
+ * each request can be examined later.
+ *
+ * @param {Object} activeXhrs - an object that tracks all XHR requests
+ * @param {WebWorker} decryptionWorker - a WebWorker interface to AES-128 decryption
+ * routines
+ * @param {Function} trackInfoFn - a callback that receives track info
+ * @param {Function} timingInfoFn - a callback that receives timing info
+ * @param {Function} videoSegmentTimingInfoFn
+ * a callback that receives video timing info based on media times and
+ * any adjustments made by the transmuxer
+ * @param {Function} audioSegmentTimingInfoFn
+ * a callback that receives audio timing info based on media times and
+ * any adjustments made by the transmuxer
+ * @param {Function} id3Fn - a callback that receives ID3 metadata
+ * @param {Function} captionsFn - a callback that receives captions
+ * @param {boolean} isEndOfTimeline
+ * true if this segment represents the last segment in a timeline
+ * @param {Function} endedTimelineFn
+ * a callback made when a timeline is ended, will only be called if
+ * isEndOfTimeline is true
+ * @param {Function} dataFn - a callback that is executed when segment bytes are available
+ * and ready to use
+ * @param {Function} doneFn - a callback that is executed after all resources have been
+ * downloaded and any decryption completed
+ */
+
+ const waitForCompletion = ({
+ activeXhrs,
+ decryptionWorker,
+ trackInfoFn,
+ timingInfoFn,
+ videoSegmentTimingInfoFn,
+ audioSegmentTimingInfoFn,
+ id3Fn,
+ captionsFn,
+ isEndOfTimeline,
+ endedTimelineFn,
+ dataFn,
+ doneFn,
+ onTransmuxerLog
+ }) => {
+ let count = 0;
+ let didError = false;
+ return (error, segment) => {
+ if (didError) {
+ return;
+ }
+ if (error) {
+ didError = true; // If there are errors, we have to abort any outstanding requests
+
+ abortAll(activeXhrs); // Even though the requests above are aborted, and in theory we could wait until we
+ // handle the aborted events from those requests, there are some cases where we may
+ // never get an aborted event. For instance, if the network connection is lost and
+ // there were two requests, the first may have triggered an error immediately, while
+ // the second request remains unsent. In that case, the aborted algorithm will not
+ // trigger an abort: see https://xhr.spec.whatwg.org/#the-abort()-method
+ //
+ // We also can't rely on the ready state of the XHR, since the request that
+ // triggered the connection error may also show as a ready state of 0 (unsent).
+ // Therefore, we have to finish this group of requests immediately after the first
+ // seen error.
+
+ return doneFn(error, segment);
+ }
+ count += 1;
+ if (count === activeXhrs.length) {
+ const segmentFinish = function () {
+ if (segment.encryptedBytes) {
+ return decryptSegment({
+ decryptionWorker,
+ segment,
+ trackInfoFn,
+ timingInfoFn,
+ videoSegmentTimingInfoFn,
+ audioSegmentTimingInfoFn,
+ id3Fn,
+ captionsFn,
+ isEndOfTimeline,
+ endedTimelineFn,
+ dataFn,
+ doneFn,
+ onTransmuxerLog
+ });
+ } // Otherwise, everything is ready just continue
+
+ handleSegmentBytes({
+ segment,
+ bytes: segment.bytes,
+ trackInfoFn,
+ timingInfoFn,
+ videoSegmentTimingInfoFn,
+ audioSegmentTimingInfoFn,
+ id3Fn,
+ captionsFn,
+ isEndOfTimeline,
+ endedTimelineFn,
+ dataFn,
+ doneFn,
+ onTransmuxerLog
+ });
+ }; // Keep track of when *all* of the requests have completed
+
+ segment.endOfAllRequests = Date.now();
+ if (segment.map && segment.map.encryptedBytes && !segment.map.bytes) {
+ return decrypt({
+ decryptionWorker,
+ // add -init to the "id" to differentiate between segment
+ // and init segment decryption, just in case they happen
+ // at the same time at some point in the future.
+ id: segment.requestId + '-init',
+ encryptedBytes: segment.map.encryptedBytes,
+ key: segment.map.key
+ }, decryptedBytes => {
+ segment.map.bytes = decryptedBytes;
+ parseInitSegment(segment, parseError => {
+ if (parseError) {
+ abortAll(activeXhrs);
+ return doneFn(parseError, segment);
+ }
+ segmentFinish();
+ });
+ });
+ }
+ segmentFinish();
+ }
+ };
+ };
+ /**
+ * Calls the abort callback if any request within the batch was aborted. Will only call
+ * the callback once per batch of requests, even if multiple were aborted.
+ *
+ * @param {Object} loadendState - state to check to see if the abort function was called
+ * @param {Function} abortFn - callback to call for abort
+ */
+
+ const handleLoadEnd = ({
+ loadendState,
+ abortFn
+ }) => event => {
+ const request = event.target;
+ if (request.aborted && abortFn && !loadendState.calledAbortFn) {
+ abortFn();
+ loadendState.calledAbortFn = true;
+ }
+ };
+ /**
+ * Simple progress event callback handler that gathers some stats before
+ * executing a provided callback with the `segment` object
+ *
+ * @param {Object} segment - a simplified copy of the segmentInfo object
+ * from SegmentLoader
+ * @param {Function} progressFn - a callback that is executed each time a progress event
+ * is received
+ * @param {Function} trackInfoFn - a callback that receives track info
+ * @param {Function} timingInfoFn - a callback that receives timing info
+ * @param {Function} videoSegmentTimingInfoFn
+ * a callback that receives video timing info based on media times and
+ * any adjustments made by the transmuxer
+ * @param {Function} audioSegmentTimingInfoFn
+ * a callback that receives audio timing info based on media times and
+ * any adjustments made by the transmuxer
+ * @param {boolean} isEndOfTimeline
+ * true if this segment represents the last segment in a timeline
+ * @param {Function} endedTimelineFn
+ * a callback made when a timeline is ended, will only be called if
+ * isEndOfTimeline is true
+ * @param {Function} dataFn - a callback that is executed when segment bytes are available
+ * and ready to use
+ * @param {Event} event - the progress event object from XMLHttpRequest
+ */
+
+ const handleProgress = ({
+ segment,
+ progressFn,
+ trackInfoFn,
+ timingInfoFn,
+ videoSegmentTimingInfoFn,
+ audioSegmentTimingInfoFn,
+ id3Fn,
+ captionsFn,
+ isEndOfTimeline,
+ endedTimelineFn,
+ dataFn
+ }) => event => {
+ const request = event.target;
+ if (request.aborted) {
+ return;
+ }
+ segment.stats = merge(segment.stats, getProgressStats(event)); // record the time that we receive the first byte of data
+
+ if (!segment.stats.firstBytesReceivedAt && segment.stats.bytesReceived) {
+ segment.stats.firstBytesReceivedAt = Date.now();
+ }
+ return progressFn(event, segment);
+ };
+ /**
+ * Load all resources and does any processing necessary for a media-segment
+ *
+ * Features:
+ * decrypts the media-segment if it has a key uri and an iv
+ * aborts *all* requests if *any* one request fails
+ *
+ * The segment object, at minimum, has the following format:
+ * {
+ * resolvedUri: String,
+ * [transmuxer]: Object,
+ * [byterange]: {
+ * offset: Number,
+ * length: Number
+ * },
+ * [key]: {
+ * resolvedUri: String
+ * [byterange]: {
+ * offset: Number,
+ * length: Number
+ * },
+ * iv: {
+ * bytes: Uint32Array
+ * }
+ * },
+ * [map]: {
+ * resolvedUri: String,
+ * [byterange]: {
+ * offset: Number,
+ * length: Number
+ * },
+ * [bytes]: Uint8Array
+ * }
+ * }
+ * ...where [name] denotes optional properties
+ *
+ * @param {Function} xhr - an instance of the xhr wrapper in xhr.js
+ * @param {Object} xhrOptions - the base options to provide to all xhr requests
+ * @param {WebWorker} decryptionWorker - a WebWorker interface to AES-128
+ * decryption routines
+ * @param {Object} segment - a simplified copy of the segmentInfo object
+ * from SegmentLoader
+ * @param {Function} abortFn - a callback called (only once) if any piece of a request was
+ * aborted
+ * @param {Function} progressFn - a callback that receives progress events from the main
+ * segment's xhr request
+ * @param {Function} trackInfoFn - a callback that receives track info
+ * @param {Function} timingInfoFn - a callback that receives timing info
+ * @param {Function} videoSegmentTimingInfoFn
+ * a callback that receives video timing info based on media times and
+ * any adjustments made by the transmuxer
+ * @param {Function} audioSegmentTimingInfoFn
+ * a callback that receives audio timing info based on media times and
+ * any adjustments made by the transmuxer
+ * @param {Function} id3Fn - a callback that receives ID3 metadata
+ * @param {Function} captionsFn - a callback that receives captions
+ * @param {boolean} isEndOfTimeline
+ * true if this segment represents the last segment in a timeline
+ * @param {Function} endedTimelineFn
+ * a callback made when a timeline is ended, will only be called if
+ * isEndOfTimeline is true
+ * @param {Function} dataFn - a callback that receives data from the main segment's xhr
+ * request, transmuxed if needed
+ * @param {Function} doneFn - a callback that is executed only once all requests have
+ * succeeded or failed
+ * @return {Function} a function that, when invoked, immediately aborts all
+ * outstanding requests
+ */
+
+ const mediaSegmentRequest = ({
+ xhr,
+ xhrOptions,
+ decryptionWorker,
+ segment,
+ abortFn,
+ progressFn,
+ trackInfoFn,
+ timingInfoFn,
+ videoSegmentTimingInfoFn,
+ audioSegmentTimingInfoFn,
+ id3Fn,
+ captionsFn,
+ isEndOfTimeline,
+ endedTimelineFn,
+ dataFn,
+ doneFn,
+ onTransmuxerLog
+ }) => {
+ const activeXhrs = [];
+ const finishProcessingFn = waitForCompletion({
+ activeXhrs,
+ decryptionWorker,
+ trackInfoFn,
+ timingInfoFn,
+ videoSegmentTimingInfoFn,
+ audioSegmentTimingInfoFn,
+ id3Fn,
+ captionsFn,
+ isEndOfTimeline,
+ endedTimelineFn,
+ dataFn,
+ doneFn,
+ onTransmuxerLog
+ }); // optionally, request the decryption key
+
+ if (segment.key && !segment.key.bytes) {
+ const objects = [segment.key];
+ if (segment.map && !segment.map.bytes && segment.map.key && segment.map.key.resolvedUri === segment.key.resolvedUri) {
+ objects.push(segment.map.key);
+ }
+ const keyRequestOptions = merge(xhrOptions, {
+ uri: segment.key.resolvedUri,
+ responseType: 'arraybuffer',
+ requestType: 'segment-key'
+ });
+ const keyRequestCallback = handleKeyResponse(segment, objects, finishProcessingFn);
+ const keyXhr = xhr(keyRequestOptions, keyRequestCallback);
+ activeXhrs.push(keyXhr);
+ } // optionally, request the associated media init segment
+
+ if (segment.map && !segment.map.bytes) {
+ const differentMapKey = segment.map.key && (!segment.key || segment.key.resolvedUri !== segment.map.key.resolvedUri);
+ if (differentMapKey) {
+ const mapKeyRequestOptions = merge(xhrOptions, {
+ uri: segment.map.key.resolvedUri,
+ responseType: 'arraybuffer',
+ requestType: 'segment-key'
+ });
+ const mapKeyRequestCallback = handleKeyResponse(segment, [segment.map.key], finishProcessingFn);
+ const mapKeyXhr = xhr(mapKeyRequestOptions, mapKeyRequestCallback);
+ activeXhrs.push(mapKeyXhr);
+ }
+ const initSegmentOptions = merge(xhrOptions, {
+ uri: segment.map.resolvedUri,
+ responseType: 'arraybuffer',
+ headers: segmentXhrHeaders(segment.map),
+ requestType: 'segment-media-initialization'
+ });
+ const initSegmentRequestCallback = handleInitSegmentResponse({
+ segment,
+ finishProcessingFn
+ });
+ const initSegmentXhr = xhr(initSegmentOptions, initSegmentRequestCallback);
+ activeXhrs.push(initSegmentXhr);
+ }
+ const segmentRequestOptions = merge(xhrOptions, {
+ uri: segment.part && segment.part.resolvedUri || segment.resolvedUri,
+ responseType: 'arraybuffer',
+ headers: segmentXhrHeaders(segment),
+ requestType: 'segment'
+ });
+ const segmentRequestCallback = handleSegmentResponse({
+ segment,
+ finishProcessingFn,
+ responseType: segmentRequestOptions.responseType
+ });
+ const segmentXhr = xhr(segmentRequestOptions, segmentRequestCallback);
+ segmentXhr.addEventListener('progress', handleProgress({
+ segment,
+ progressFn,
+ trackInfoFn,
+ timingInfoFn,
+ videoSegmentTimingInfoFn,
+ audioSegmentTimingInfoFn,
+ id3Fn,
+ captionsFn,
+ isEndOfTimeline,
+ endedTimelineFn,
+ dataFn
+ }));
+ activeXhrs.push(segmentXhr); // since all parts of the request must be considered, but should not make callbacks
+ // multiple times, provide a shared state object
+
+ const loadendState = {};
+ activeXhrs.forEach(activeXhr => {
+ activeXhr.addEventListener('loadend', handleLoadEnd({
+ loadendState,
+ abortFn
+ }));
+ });
+ return () => abortAll(activeXhrs);
+ };
+
+ /**
+ * @file - codecs.js - Handles tasks regarding codec strings such as translating them to
+ * codec strings, or translating codec strings into objects that can be examined.
+ */
+ const logFn$1 = logger('CodecUtils');
+ /**
+ * Returns a set of codec strings parsed from the playlist or the default
+ * codec strings if no codecs were specified in the playlist
+ *
+ * @param {Playlist} media the current media playlist
+ * @return {Object} an object with the video and audio codecs
+ */
+
+ const getCodecs = function (media) {
+ // if the codecs were explicitly specified, use them instead of the
+ // defaults
+ const mediaAttributes = media.attributes || {};
+ if (mediaAttributes.CODECS) {
+ return parseCodecs(mediaAttributes.CODECS);
+ }
+ };
+ const isMaat = (main, media) => {
+ const mediaAttributes = media.attributes || {};
+ return main && main.mediaGroups && main.mediaGroups.AUDIO && mediaAttributes.AUDIO && main.mediaGroups.AUDIO[mediaAttributes.AUDIO];
+ };
+ const isMuxed = (main, media) => {
+ if (!isMaat(main, media)) {
+ return true;
+ }
+ const mediaAttributes = media.attributes || {};
+ const audioGroup = main.mediaGroups.AUDIO[mediaAttributes.AUDIO];
+ for (const groupId in audioGroup) {
+ // If an audio group has a URI (the case for HLS, as HLS will use external playlists),
+ // or there are listed playlists (the case for DASH, as the manifest will have already
+ // provided all of the details necessary to generate the audio playlist, as opposed to
+ // HLS' externally requested playlists), then the content is demuxed.
+ if (!audioGroup[groupId].uri && !audioGroup[groupId].playlists) {
+ return true;
+ }
+ }
+ return false;
+ };
+ const unwrapCodecList = function (codecList) {
+ const codecs = {};
+ codecList.forEach(({
+ mediaType,
+ type,
+ details
+ }) => {
+ codecs[mediaType] = codecs[mediaType] || [];
+ codecs[mediaType].push(translateLegacyCodec(`${type}${details}`));
+ });
+ Object.keys(codecs).forEach(function (mediaType) {
+ if (codecs[mediaType].length > 1) {
+ logFn$1(`multiple ${mediaType} codecs found as attributes: ${codecs[mediaType].join(', ')}. Setting playlist codecs to null so that we wait for mux.js to probe segments for real codecs.`);
+ codecs[mediaType] = null;
+ return;
+ }
+ codecs[mediaType] = codecs[mediaType][0];
+ });
+ return codecs;
+ };
+ const codecCount = function (codecObj) {
+ let count = 0;
+ if (codecObj.audio) {
+ count++;
+ }
+ if (codecObj.video) {
+ count++;
+ }
+ return count;
+ };
+ /**
+ * Calculates the codec strings for a working configuration of
+ * SourceBuffers to play variant streams in a main playlist. If
+ * there is no possible working configuration, an empty object will be
+ * returned.
+ *
+ * @param main {Object} the m3u8 object for the main playlist
+ * @param media {Object} the m3u8 object for the variant playlist
+ * @return {Object} the codec strings.
+ *
+ * @private
+ */
+
+ const codecsForPlaylist = function (main, media) {
+ const mediaAttributes = media.attributes || {};
+ const codecInfo = unwrapCodecList(getCodecs(media) || []); // HLS with multiple-audio tracks must always get an audio codec.
+ // Put another way, there is no way to have a video-only multiple-audio HLS!
+
+ if (isMaat(main, media) && !codecInfo.audio) {
+ if (!isMuxed(main, media)) {
+ // It is possible for codecs to be specified on the audio media group playlist but
+ // not on the rendition playlist. This is mostly the case for DASH, where audio and
+ // video are always separate (and separately specified).
+ const defaultCodecs = unwrapCodecList(codecsFromDefault(main, mediaAttributes.AUDIO) || []);
+ if (defaultCodecs.audio) {
+ codecInfo.audio = defaultCodecs.audio;
+ }
+ }
+ }
+ return codecInfo;
+ };
+ const logFn = logger('PlaylistSelector');
+ const representationToString = function (representation) {
+ if (!representation || !representation.playlist) {
+ return;
+ }
+ const playlist = representation.playlist;
+ return JSON.stringify({
+ id: playlist.id,
+ bandwidth: representation.bandwidth,
+ width: representation.width,
+ height: representation.height,
+ codecs: playlist.attributes && playlist.attributes.CODECS || ''
+ });
+ }; // Utilities
+
+ /**
+ * Returns the CSS value for the specified property on an element
+ * using `getComputedStyle`. Firefox has a long-standing issue where
+ * getComputedStyle() may return null when running in an iframe with
+ * `display: none`.
+ *
+ * @see https://bugzilla.mozilla.org/show_bug.cgi?id=548397
+ * @param {HTMLElement} el the htmlelement to work on
+ * @param {string} the proprety to get the style for
+ */
+
+ const safeGetComputedStyle = function (el, property) {
+ if (!el) {
+ return '';
+ }
+ const result = window.getComputedStyle(el);
+ if (!result) {
+ return '';
+ }
+ return result[property];
+ };
+ /**
+ * Resuable stable sort function
+ *
+ * @param {Playlists} array
+ * @param {Function} sortFn Different comparators
+ * @function stableSort
+ */
+
+ const stableSort = function (array, sortFn) {
+ const newArray = array.slice();
+ array.sort(function (left, right) {
+ const cmp = sortFn(left, right);
+ if (cmp === 0) {
+ return newArray.indexOf(left) - newArray.indexOf(right);
+ }
+ return cmp;
+ });
+ };
+ /**
+ * A comparator function to sort two playlist object by bandwidth.
+ *
+ * @param {Object} left a media playlist object
+ * @param {Object} right a media playlist object
+ * @return {number} Greater than zero if the bandwidth attribute of
+ * left is greater than the corresponding attribute of right. Less
+ * than zero if the bandwidth of right is greater than left and
+ * exactly zero if the two are equal.
+ */
+
+ const comparePlaylistBandwidth = function (left, right) {
+ let leftBandwidth;
+ let rightBandwidth;
+ if (left.attributes.BANDWIDTH) {
+ leftBandwidth = left.attributes.BANDWIDTH;
+ }
+ leftBandwidth = leftBandwidth || window.Number.MAX_VALUE;
+ if (right.attributes.BANDWIDTH) {
+ rightBandwidth = right.attributes.BANDWIDTH;
+ }
+ rightBandwidth = rightBandwidth || window.Number.MAX_VALUE;
+ return leftBandwidth - rightBandwidth;
+ };
+ /**
+ * A comparator function to sort two playlist object by resolution (width).
+ *
+ * @param {Object} left a media playlist object
+ * @param {Object} right a media playlist object
+ * @return {number} Greater than zero if the resolution.width attribute of
+ * left is greater than the corresponding attribute of right. Less
+ * than zero if the resolution.width of right is greater than left and
+ * exactly zero if the two are equal.
+ */
+
+ const comparePlaylistResolution = function (left, right) {
+ let leftWidth;
+ let rightWidth;
+ if (left.attributes.RESOLUTION && left.attributes.RESOLUTION.width) {
+ leftWidth = left.attributes.RESOLUTION.width;
+ }
+ leftWidth = leftWidth || window.Number.MAX_VALUE;
+ if (right.attributes.RESOLUTION && right.attributes.RESOLUTION.width) {
+ rightWidth = right.attributes.RESOLUTION.width;
+ }
+ rightWidth = rightWidth || window.Number.MAX_VALUE; // NOTE - Fallback to bandwidth sort as appropriate in cases where multiple renditions
+ // have the same media dimensions/ resolution
+
+ if (leftWidth === rightWidth && left.attributes.BANDWIDTH && right.attributes.BANDWIDTH) {
+ return left.attributes.BANDWIDTH - right.attributes.BANDWIDTH;
+ }
+ return leftWidth - rightWidth;
+ };
+ /**
+ * Chooses the appropriate media playlist based on bandwidth and player size
+ *
+ * @param {Object} main
+ * Object representation of the main manifest
+ * @param {number} playerBandwidth
+ * Current calculated bandwidth of the player
+ * @param {number} playerWidth
+ * Current width of the player element (should account for the device pixel ratio)
+ * @param {number} playerHeight
+ * Current height of the player element (should account for the device pixel ratio)
+ * @param {boolean} limitRenditionByPlayerDimensions
+ * True if the player width and height should be used during the selection, false otherwise
+ * @param {Object} playlistController
+ * the current playlistController object
+ * @return {Playlist} the highest bitrate playlist less than the
+ * currently detected bandwidth, accounting for some amount of
+ * bandwidth variance
+ */
+
+ let simpleSelector = function (main, playerBandwidth, playerWidth, playerHeight, limitRenditionByPlayerDimensions, playlistController) {
+ // If we end up getting called before `main` is available, exit early
+ if (!main) {
+ return;
+ }
+ const options = {
+ bandwidth: playerBandwidth,
+ width: playerWidth,
+ height: playerHeight,
+ limitRenditionByPlayerDimensions
+ };
+ let playlists = main.playlists; // if playlist is audio only, select between currently active audio group playlists.
+
+ if (Playlist.isAudioOnly(main)) {
+ playlists = playlistController.getAudioTrackPlaylists_(); // add audioOnly to options so that we log audioOnly: true
+ // at the buttom of this function for debugging.
+
+ options.audioOnly = true;
+ } // convert the playlists to an intermediary representation to make comparisons easier
+
+ let sortedPlaylistReps = playlists.map(playlist => {
+ let bandwidth;
+ const width = playlist.attributes && playlist.attributes.RESOLUTION && playlist.attributes.RESOLUTION.width;
+ const height = playlist.attributes && playlist.attributes.RESOLUTION && playlist.attributes.RESOLUTION.height;
+ bandwidth = playlist.attributes && playlist.attributes.BANDWIDTH;
+ bandwidth = bandwidth || window.Number.MAX_VALUE;
+ return {
+ bandwidth,
+ width,
+ height,
+ playlist
+ };
+ });
+ stableSort(sortedPlaylistReps, (left, right) => left.bandwidth - right.bandwidth); // filter out any playlists that have been excluded due to
+ // incompatible configurations
+
+ sortedPlaylistReps = sortedPlaylistReps.filter(rep => !Playlist.isIncompatible(rep.playlist)); // filter out any playlists that have been disabled manually through the representations
+ // api or excluded temporarily due to playback errors.
+
+ let enabledPlaylistReps = sortedPlaylistReps.filter(rep => Playlist.isEnabled(rep.playlist));
+ if (!enabledPlaylistReps.length) {
+ // if there are no enabled playlists, then they have all been excluded or disabled
+ // by the user through the representations api. In this case, ignore exclusion and
+ // fallback to what the user wants by using playlists the user has not disabled.
+ enabledPlaylistReps = sortedPlaylistReps.filter(rep => !Playlist.isDisabled(rep.playlist));
+ } // filter out any variant that has greater effective bitrate
+ // than the current estimated bandwidth
+
+ const bandwidthPlaylistReps = enabledPlaylistReps.filter(rep => rep.bandwidth * Config.BANDWIDTH_VARIANCE < playerBandwidth);
+ let highestRemainingBandwidthRep = bandwidthPlaylistReps[bandwidthPlaylistReps.length - 1]; // get all of the renditions with the same (highest) bandwidth
+ // and then taking the very first element
+
+ const bandwidthBestRep = bandwidthPlaylistReps.filter(rep => rep.bandwidth === highestRemainingBandwidthRep.bandwidth)[0]; // if we're not going to limit renditions by player size, make an early decision.
+
+ if (limitRenditionByPlayerDimensions === false) {
+ const chosenRep = bandwidthBestRep || enabledPlaylistReps[0] || sortedPlaylistReps[0];
+ if (chosenRep && chosenRep.playlist) {
+ let type = 'sortedPlaylistReps';
+ if (bandwidthBestRep) {
+ type = 'bandwidthBestRep';
+ }
+ if (enabledPlaylistReps[0]) {
+ type = 'enabledPlaylistReps';
+ }
+ logFn(`choosing ${representationToString(chosenRep)} using ${type} with options`, options);
+ return chosenRep.playlist;
+ }
+ logFn('could not choose a playlist with options', options);
+ return null;
+ } // filter out playlists without resolution information
+
+ const haveResolution = bandwidthPlaylistReps.filter(rep => rep.width && rep.height); // sort variants by resolution
+
+ stableSort(haveResolution, (left, right) => left.width - right.width); // if we have the exact resolution as the player use it
+
+ const resolutionBestRepList = haveResolution.filter(rep => rep.width === playerWidth && rep.height === playerHeight);
+ highestRemainingBandwidthRep = resolutionBestRepList[resolutionBestRepList.length - 1]; // ensure that we pick the highest bandwidth variant that have exact resolution
+
+ const resolutionBestRep = resolutionBestRepList.filter(rep => rep.bandwidth === highestRemainingBandwidthRep.bandwidth)[0];
+ let resolutionPlusOneList;
+ let resolutionPlusOneSmallest;
+ let resolutionPlusOneRep; // find the smallest variant that is larger than the player
+ // if there is no match of exact resolution
+
+ if (!resolutionBestRep) {
+ resolutionPlusOneList = haveResolution.filter(rep => rep.width > playerWidth || rep.height > playerHeight); // find all the variants have the same smallest resolution
+
+ resolutionPlusOneSmallest = resolutionPlusOneList.filter(rep => rep.width === resolutionPlusOneList[0].width && rep.height === resolutionPlusOneList[0].height); // ensure that we also pick the highest bandwidth variant that
+ // is just-larger-than the video player
+
+ highestRemainingBandwidthRep = resolutionPlusOneSmallest[resolutionPlusOneSmallest.length - 1];
+ resolutionPlusOneRep = resolutionPlusOneSmallest.filter(rep => rep.bandwidth === highestRemainingBandwidthRep.bandwidth)[0];
+ }
+ let leastPixelDiffRep; // If this selector proves to be better than others,
+ // resolutionPlusOneRep and resolutionBestRep and all
+ // the code involving them should be removed.
+
+ if (playlistController.leastPixelDiffSelector) {
+ // find the variant that is closest to the player's pixel size
+ const leastPixelDiffList = haveResolution.map(rep => {
+ rep.pixelDiff = Math.abs(rep.width - playerWidth) + Math.abs(rep.height - playerHeight);
+ return rep;
+ }); // get the highest bandwidth, closest resolution playlist
+
+ stableSort(leastPixelDiffList, (left, right) => {
+ // sort by highest bandwidth if pixelDiff is the same
+ if (left.pixelDiff === right.pixelDiff) {
+ return right.bandwidth - left.bandwidth;
+ }
+ return left.pixelDiff - right.pixelDiff;
+ });
+ leastPixelDiffRep = leastPixelDiffList[0];
+ } // fallback chain of variants
+
+ const chosenRep = leastPixelDiffRep || resolutionPlusOneRep || resolutionBestRep || bandwidthBestRep || enabledPlaylistReps[0] || sortedPlaylistReps[0];
+ if (chosenRep && chosenRep.playlist) {
+ let type = 'sortedPlaylistReps';
+ if (leastPixelDiffRep) {
+ type = 'leastPixelDiffRep';
+ } else if (resolutionPlusOneRep) {
+ type = 'resolutionPlusOneRep';
+ } else if (resolutionBestRep) {
+ type = 'resolutionBestRep';
+ } else if (bandwidthBestRep) {
+ type = 'bandwidthBestRep';
+ } else if (enabledPlaylistReps[0]) {
+ type = 'enabledPlaylistReps';
+ }
+ logFn(`choosing ${representationToString(chosenRep)} using ${type} with options`, options);
+ return chosenRep.playlist;
+ }
+ logFn('could not choose a playlist with options', options);
+ return null;
+ };
+
+ /**
+ * Chooses the appropriate media playlist based on the most recent
+ * bandwidth estimate and the player size.
+ *
+ * Expects to be called within the context of an instance of VhsHandler
+ *
+ * @return {Playlist} the highest bitrate playlist less than the
+ * currently detected bandwidth, accounting for some amount of
+ * bandwidth variance
+ */
+
+ const lastBandwidthSelector = function () {
+ let pixelRatio = this.useDevicePixelRatio ? window.devicePixelRatio || 1 : 1;
+ if (!isNaN(this.customPixelRatio)) {
+ pixelRatio = this.customPixelRatio;
+ }
+ return simpleSelector(this.playlists.main, this.systemBandwidth, parseInt(safeGetComputedStyle(this.tech_.el(), 'width'), 10) * pixelRatio, parseInt(safeGetComputedStyle(this.tech_.el(), 'height'), 10) * pixelRatio, this.limitRenditionByPlayerDimensions, this.playlistController_);
+ };
+ /**
+ * Chooses the appropriate media playlist based on an
+ * exponential-weighted moving average of the bandwidth after
+ * filtering for player size.
+ *
+ * Expects to be called within the context of an instance of VhsHandler
+ *
+ * @param {number} decay - a number between 0 and 1. Higher values of
+ * this parameter will cause previous bandwidth estimates to lose
+ * significance more quickly.
+ * @return {Function} a function which can be invoked to create a new
+ * playlist selector function.
+ * @see https://en.wikipedia.org/wiki/Moving_average#Exponential_moving_average
+ */
+
+ const movingAverageBandwidthSelector = function (decay) {
+ let average = -1;
+ let lastSystemBandwidth = -1;
+ if (decay < 0 || decay > 1) {
+ throw new Error('Moving average bandwidth decay must be between 0 and 1.');
+ }
+ return function () {
+ let pixelRatio = this.useDevicePixelRatio ? window.devicePixelRatio || 1 : 1;
+ if (!isNaN(this.customPixelRatio)) {
+ pixelRatio = this.customPixelRatio;
+ }
+ if (average < 0) {
+ average = this.systemBandwidth;
+ lastSystemBandwidth = this.systemBandwidth;
+ } // stop the average value from decaying for every 250ms
+ // when the systemBandwidth is constant
+ // and
+ // stop average from setting to a very low value when the
+ // systemBandwidth becomes 0 in case of chunk cancellation
+
+ if (this.systemBandwidth > 0 && this.systemBandwidth !== lastSystemBandwidth) {
+ average = decay * this.systemBandwidth + (1 - decay) * average;
+ lastSystemBandwidth = this.systemBandwidth;
+ }
+ return simpleSelector(this.playlists.main, average, parseInt(safeGetComputedStyle(this.tech_.el(), 'width'), 10) * pixelRatio, parseInt(safeGetComputedStyle(this.tech_.el(), 'height'), 10) * pixelRatio, this.limitRenditionByPlayerDimensions, this.playlistController_);
+ };
+ };
+ /**
+ * Chooses the appropriate media playlist based on the potential to rebuffer
+ *
+ * @param {Object} settings
+ * Object of information required to use this selector
+ * @param {Object} settings.main
+ * Object representation of the main manifest
+ * @param {number} settings.currentTime
+ * The current time of the player
+ * @param {number} settings.bandwidth
+ * Current measured bandwidth
+ * @param {number} settings.duration
+ * Duration of the media
+ * @param {number} settings.segmentDuration
+ * Segment duration to be used in round trip time calculations
+ * @param {number} settings.timeUntilRebuffer
+ * Time left in seconds until the player has to rebuffer
+ * @param {number} settings.currentTimeline
+ * The current timeline segments are being loaded from
+ * @param {SyncController} settings.syncController
+ * SyncController for determining if we have a sync point for a given playlist
+ * @return {Object|null}
+ * {Object} return.playlist
+ * The highest bandwidth playlist with the least amount of rebuffering
+ * {Number} return.rebufferingImpact
+ * The amount of time in seconds switching to this playlist will rebuffer. A
+ * negative value means that switching will cause zero rebuffering.
+ */
+
+ const minRebufferMaxBandwidthSelector = function (settings) {
+ const {
+ main,
+ currentTime,
+ bandwidth,
+ duration,
+ segmentDuration,
+ timeUntilRebuffer,
+ currentTimeline,
+ syncController
+ } = settings; // filter out any playlists that have been excluded due to
+ // incompatible configurations
+
+ const compatiblePlaylists = main.playlists.filter(playlist => !Playlist.isIncompatible(playlist)); // filter out any playlists that have been disabled manually through the representations
+ // api or excluded temporarily due to playback errors.
+
+ let enabledPlaylists = compatiblePlaylists.filter(Playlist.isEnabled);
+ if (!enabledPlaylists.length) {
+ // if there are no enabled playlists, then they have all been excluded or disabled
+ // by the user through the representations api. In this case, ignore exclusion and
+ // fallback to what the user wants by using playlists the user has not disabled.
+ enabledPlaylists = compatiblePlaylists.filter(playlist => !Playlist.isDisabled(playlist));
+ }
+ const bandwidthPlaylists = enabledPlaylists.filter(Playlist.hasAttribute.bind(null, 'BANDWIDTH'));
+ const rebufferingEstimates = bandwidthPlaylists.map(playlist => {
+ const syncPoint = syncController.getSyncPoint(playlist, duration, currentTimeline, currentTime); // If there is no sync point for this playlist, switching to it will require a
+ // sync request first. This will double the request time
+
+ const numRequests = syncPoint ? 1 : 2;
+ const requestTimeEstimate = Playlist.estimateSegmentRequestTime(segmentDuration, bandwidth, playlist);
+ const rebufferingImpact = requestTimeEstimate * numRequests - timeUntilRebuffer;
+ return {
+ playlist,
+ rebufferingImpact
+ };
+ });
+ const noRebufferingPlaylists = rebufferingEstimates.filter(estimate => estimate.rebufferingImpact <= 0); // Sort by bandwidth DESC
+
+ stableSort(noRebufferingPlaylists, (a, b) => comparePlaylistBandwidth(b.playlist, a.playlist));
+ if (noRebufferingPlaylists.length) {
+ return noRebufferingPlaylists[0];
+ }
+ stableSort(rebufferingEstimates, (a, b) => a.rebufferingImpact - b.rebufferingImpact);
+ return rebufferingEstimates[0] || null;
+ };
+ /**
+ * Chooses the appropriate media playlist, which in this case is the lowest bitrate
+ * one with video. If no renditions with video exist, return the lowest audio rendition.
+ *
+ * Expects to be called within the context of an instance of VhsHandler
+ *
+ * @return {Object|null}
+ * {Object} return.playlist
+ * The lowest bitrate playlist that contains a video codec. If no such rendition
+ * exists pick the lowest audio rendition.
+ */
+
+ const lowestBitrateCompatibleVariantSelector = function () {
+ // filter out any playlists that have been excluded due to
+ // incompatible configurations or playback errors
+ const playlists = this.playlists.main.playlists.filter(Playlist.isEnabled); // Sort ascending by bitrate
+
+ stableSort(playlists, (a, b) => comparePlaylistBandwidth(a, b)); // Parse and assume that playlists with no video codec have no video
+ // (this is not necessarily true, although it is generally true).
+ //
+ // If an entire manifest has no valid videos everything will get filtered
+ // out.
+
+ const playlistsWithVideo = playlists.filter(playlist => !!codecsForPlaylist(this.playlists.main, playlist).video);
+ return playlistsWithVideo[0] || null;
+ };
+
+ /**
+ * Combine all segments into a single Uint8Array
+ *
+ * @param {Object} segmentObj
+ * @return {Uint8Array} concatenated bytes
+ * @private
+ */
+ const concatSegments = segmentObj => {
+ let offset = 0;
+ let tempBuffer;
+ if (segmentObj.bytes) {
+ tempBuffer = new Uint8Array(segmentObj.bytes); // combine the individual segments into one large typed-array
+
+ segmentObj.segments.forEach(segment => {
+ tempBuffer.set(segment, offset);
+ offset += segment.byteLength;
+ });
+ }
+ return tempBuffer;
+ };
+ /**
+ * Example:
+ * https://host.com/path1/path2/path3/segment.ts?arg1=val1
+ * -->
+ * path3/segment.ts
+ *
+ * @param resolvedUri
+ * @return {string}
+ */
+
+ function compactSegmentUrlDescription(resolvedUri) {
+ try {
+ return new URL(resolvedUri).pathname.split('/').slice(-2).join('/');
+ } catch (e) {
+ return '';
+ }
+ }
+
+ /**
+ * @file text-tracks.js
+ */
+ /**
+ * Create captions text tracks on video.js if they do not exist
+ *
+ * @param {Object} inbandTextTracks a reference to current inbandTextTracks
+ * @param {Object} tech the video.js tech
+ * @param {Object} captionStream the caption stream to create
+ * @private
+ */
+
+ const createCaptionsTrackIfNotExists = function (inbandTextTracks, tech, captionStream) {
+ if (!inbandTextTracks[captionStream]) {
+ tech.trigger({
+ type: 'usage',
+ name: 'vhs-608'
+ });
+ let instreamId = captionStream; // we need to translate SERVICEn for 708 to how mux.js currently labels them
+
+ if (/^cc708_/.test(captionStream)) {
+ instreamId = 'SERVICE' + captionStream.split('_')[1];
+ }
+ const track = tech.textTracks().getTrackById(instreamId);
+ if (track) {
+ // Resuse an existing track with a CC# id because this was
+ // very likely created by videojs-contrib-hls from information
+ // in the m3u8 for us to use
+ inbandTextTracks[captionStream] = track;
+ } else {
+ // This section gets called when we have caption services that aren't specified in the manifest.
+ // Manifest level caption services are handled in media-groups.js under CLOSED-CAPTIONS.
+ const captionServices = tech.options_.vhs && tech.options_.vhs.captionServices || {};
+ let label = captionStream;
+ let language = captionStream;
+ let def = false;
+ const captionService = captionServices[instreamId];
+ if (captionService) {
+ label = captionService.label;
+ language = captionService.language;
+ def = captionService.default;
+ } // Otherwise, create a track with the default `CC#` label and
+ // without a language
+
+ inbandTextTracks[captionStream] = tech.addRemoteTextTrack({
+ kind: 'captions',
+ id: instreamId,
+ // TODO: investigate why this doesn't seem to turn the caption on by default
+ default: def,
+ label,
+ language
+ }, false).track;
+ }
+ }
+ };
+ /**
+ * Add caption text track data to a source handler given an array of captions
+ *
+ * @param {Object}
+ * @param {Object} inbandTextTracks the inband text tracks
+ * @param {number} timestampOffset the timestamp offset of the source buffer
+ * @param {Array} captionArray an array of caption data
+ * @private
+ */
+
+ const addCaptionData = function ({
+ inbandTextTracks,
+ captionArray,
+ timestampOffset
+ }) {
+ if (!captionArray) {
+ return;
+ }
+ const Cue = window.WebKitDataCue || window.VTTCue;
+ captionArray.forEach(caption => {
+ const track = caption.stream; // in CEA 608 captions, video.js/mux.js sends a content array
+ // with positioning data
+
+ if (caption.content) {
+ caption.content.forEach(value => {
+ const cue = new Cue(caption.startTime + timestampOffset, caption.endTime + timestampOffset, value.text);
+ cue.line = value.line;
+ cue.align = 'left';
+ cue.position = value.position;
+ cue.positionAlign = 'line-left';
+ inbandTextTracks[track].addCue(cue);
+ });
+ } else {
+ // otherwise, a text value with combined captions is sent
+ inbandTextTracks[track].addCue(new Cue(caption.startTime + timestampOffset, caption.endTime + timestampOffset, caption.text));
+ }
+ });
+ };
+ /**
+ * Define properties on a cue for backwards compatability,
+ * but warn the user that the way that they are using it
+ * is depricated and will be removed at a later date.
+ *
+ * @param {Cue} cue the cue to add the properties on
+ * @private
+ */
+
+ const deprecateOldCue = function (cue) {
+ Object.defineProperties(cue.frame, {
+ id: {
+ get() {
+ videojs.log.warn('cue.frame.id is deprecated. Use cue.value.key instead.');
+ return cue.value.key;
+ }
+ },
+ value: {
+ get() {
+ videojs.log.warn('cue.frame.value is deprecated. Use cue.value.data instead.');
+ return cue.value.data;
+ }
+ },
+ privateData: {
+ get() {
+ videojs.log.warn('cue.frame.privateData is deprecated. Use cue.value.data instead.');
+ return cue.value.data;
+ }
+ }
+ });
+ };
+ /**
+ * Add metadata text track data to a source handler given an array of metadata
+ *
+ * @param {Object}
+ * @param {Object} inbandTextTracks the inband text tracks
+ * @param {Array} metadataArray an array of meta data
+ * @param {number} timestampOffset the timestamp offset of the source buffer
+ * @param {number} videoDuration the duration of the video
+ * @private
+ */
+
+ const addMetadata = ({
+ inbandTextTracks,
+ metadataArray,
+ timestampOffset,
+ videoDuration
+ }) => {
+ if (!metadataArray) {
+ return;
+ }
+ const Cue = window.WebKitDataCue || window.VTTCue;
+ const metadataTrack = inbandTextTracks.metadataTrack_;
+ if (!metadataTrack) {
+ return;
+ }
+ metadataArray.forEach(metadata => {
+ const time = metadata.cueTime + timestampOffset; // if time isn't a finite number between 0 and Infinity, like NaN,
+ // ignore this bit of metadata.
+ // This likely occurs when you have an non-timed ID3 tag like TIT2,
+ // which is the "Title/Songname/Content description" frame
+
+ if (typeof time !== 'number' || window.isNaN(time) || time < 0 || !(time < Infinity)) {
+ return;
+ } // If we have no frames, we can't create a cue.
+
+ if (!metadata.frames || !metadata.frames.length) {
+ return;
+ }
+ metadata.frames.forEach(frame => {
+ const cue = new Cue(time, time, frame.value || frame.url || frame.data || '');
+ cue.frame = frame;
+ cue.value = frame;
+ deprecateOldCue(cue);
+ metadataTrack.addCue(cue);
+ });
+ });
+ if (!metadataTrack.cues || !metadataTrack.cues.length) {
+ return;
+ } // Updating the metadeta cues so that
+ // the endTime of each cue is the startTime of the next cue
+ // the endTime of last cue is the duration of the video
+
+ const cues = metadataTrack.cues;
+ const cuesArray = []; // Create a copy of the TextTrackCueList...
+ // ...disregarding cues with a falsey value
+
+ for (let i = 0; i < cues.length; i++) {
+ if (cues[i]) {
+ cuesArray.push(cues[i]);
+ }
+ } // Group cues by their startTime value
+
+ const cuesGroupedByStartTime = cuesArray.reduce((obj, cue) => {
+ const timeSlot = obj[cue.startTime] || [];
+ timeSlot.push(cue);
+ obj[cue.startTime] = timeSlot;
+ return obj;
+ }, {}); // Sort startTimes by ascending order
+
+ const sortedStartTimes = Object.keys(cuesGroupedByStartTime).sort((a, b) => Number(a) - Number(b)); // Map each cue group's endTime to the next group's startTime
+
+ sortedStartTimes.forEach((startTime, idx) => {
+ const cueGroup = cuesGroupedByStartTime[startTime];
+ const finiteDuration = isFinite(videoDuration) ? videoDuration : startTime;
+ const nextTime = Number(sortedStartTimes[idx + 1]) || finiteDuration; // Map each cue's endTime the next group's startTime
+
+ cueGroup.forEach(cue => {
+ cue.endTime = nextTime;
+ });
+ });
+ }; // object for mapping daterange attributes
+
+ const dateRangeAttr = {
+ id: 'ID',
+ class: 'CLASS',
+ startDate: 'START-DATE',
+ duration: 'DURATION',
+ endDate: 'END-DATE',
+ endOnNext: 'END-ON-NEXT',
+ plannedDuration: 'PLANNED-DURATION',
+ scte35Out: 'SCTE35-OUT',
+ scte35In: 'SCTE35-IN'
+ };
+ const dateRangeKeysToOmit = new Set(['id', 'class', 'startDate', 'duration', 'endDate', 'endOnNext', 'startTime', 'endTime', 'processDateRange']);
+ /**
+ * Add DateRange metadata text track to a source handler given an array of metadata
+ *
+ * @param {Object}
+ * @param {Object} inbandTextTracks the inband text tracks
+ * @param {Array} dateRanges parsed media playlist
+ * @private
+ */
+
+ const addDateRangeMetadata = ({
+ inbandTextTracks,
+ dateRanges
+ }) => {
+ const metadataTrack = inbandTextTracks.metadataTrack_;
+ if (!metadataTrack) {
+ return;
+ }
+ const Cue = window.WebKitDataCue || window.VTTCue;
+ dateRanges.forEach(dateRange => {
+ // we generate multiple cues for each date range with different attributes
+ for (const key of Object.keys(dateRange)) {
+ if (dateRangeKeysToOmit.has(key)) {
+ continue;
+ }
+ const cue = new Cue(dateRange.startTime, dateRange.endTime, '');
+ cue.id = dateRange.id;
+ cue.type = 'com.apple.quicktime.HLS';
+ cue.value = {
+ key: dateRangeAttr[key],
+ data: dateRange[key]
+ };
+ if (key === 'scte35Out' || key === 'scte35In') {
+ cue.value.data = new Uint8Array(cue.value.data.match(/[\da-f]{2}/gi)).buffer;
+ }
+ metadataTrack.addCue(cue);
+ }
+ dateRange.processDateRange();
+ });
+ };
+ /**
+ * Create metadata text track on video.js if it does not exist
+ *
+ * @param {Object} inbandTextTracks a reference to current inbandTextTracks
+ * @param {string} dispatchType the inband metadata track dispatch type
+ * @param {Object} tech the video.js tech
+ * @private
+ */
+
+ const createMetadataTrackIfNotExists = (inbandTextTracks, dispatchType, tech) => {
+ if (inbandTextTracks.metadataTrack_) {
+ return;
+ }
+ inbandTextTracks.metadataTrack_ = tech.addRemoteTextTrack({
+ kind: 'metadata',
+ label: 'Timed Metadata'
+ }, false).track;
+ if (!videojs.browser.IS_ANY_SAFARI) {
+ inbandTextTracks.metadataTrack_.inBandMetadataTrackDispatchType = dispatchType;
+ }
+ };
+ /**
+ * Remove cues from a track on video.js.
+ *
+ * @param {Double} start start of where we should remove the cue
+ * @param {Double} end end of where the we should remove the cue
+ * @param {Object} track the text track to remove the cues from
+ * @private
+ */
+
+ const removeCuesFromTrack = function (start, end, track) {
+ let i;
+ let cue;
+ if (!track) {
+ return;
+ }
+ if (!track.cues) {
+ return;
+ }
+ i = track.cues.length;
+ while (i--) {
+ cue = track.cues[i]; // Remove any cue within the provided start and end time
+
+ if (cue.startTime >= start && cue.endTime <= end) {
+ track.removeCue(cue);
+ }
+ }
+ };
+ /**
+ * Remove duplicate cues from a track on video.js (a cue is considered a
+ * duplicate if it has the same time interval and text as another)
+ *
+ * @param {Object} track the text track to remove the duplicate cues from
+ * @private
+ */
+
+ const removeDuplicateCuesFromTrack = function (track) {
+ const cues = track.cues;
+ if (!cues) {
+ return;
+ }
+ const uniqueCues = {};
+ for (let i = cues.length - 1; i >= 0; i--) {
+ const cue = cues[i];
+ const cueKey = `${cue.startTime}-${cue.endTime}-${cue.text}`;
+ if (uniqueCues[cueKey]) {
+ track.removeCue(cue);
+ } else {
+ uniqueCues[cueKey] = cue;
+ }
+ }
+ };
+
+ /**
+ * Returns a list of gops in the buffer that have a pts value of 3 seconds or more in
+ * front of current time.
+ *
+ * @param {Array} buffer
+ * The current buffer of gop information
+ * @param {number} currentTime
+ * The current time
+ * @param {Double} mapping
+ * Offset to map display time to stream presentation time
+ * @return {Array}
+ * List of gops considered safe to append over
+ */
+
+ const gopsSafeToAlignWith = (buffer, currentTime, mapping) => {
+ if (typeof currentTime === 'undefined' || currentTime === null || !buffer.length) {
+ return [];
+ } // pts value for current time + 3 seconds to give a bit more wiggle room
+
+ const currentTimePts = Math.ceil((currentTime - mapping + 3) * clock_1);
+ let i;
+ for (i = 0; i < buffer.length; i++) {
+ if (buffer[i].pts > currentTimePts) {
+ break;
+ }
+ }
+ return buffer.slice(i);
+ };
+ /**
+ * Appends gop information (timing and byteLength) received by the transmuxer for the
+ * gops appended in the last call to appendBuffer
+ *
+ * @param {Array} buffer
+ * The current buffer of gop information
+ * @param {Array} gops
+ * List of new gop information
+ * @param {boolean} replace
+ * If true, replace the buffer with the new gop information. If false, append the
+ * new gop information to the buffer in the right location of time.
+ * @return {Array}
+ * Updated list of gop information
+ */
+
+ const updateGopBuffer = (buffer, gops, replace) => {
+ if (!gops.length) {
+ return buffer;
+ }
+ if (replace) {
+ // If we are in safe append mode, then completely overwrite the gop buffer
+ // with the most recent appeneded data. This will make sure that when appending
+ // future segments, we only try to align with gops that are both ahead of current
+ // time and in the last segment appended.
+ return gops.slice();
+ }
+ const start = gops[0].pts;
+ let i = 0;
+ for (i; i < buffer.length; i++) {
+ if (buffer[i].pts >= start) {
+ break;
+ }
+ }
+ return buffer.slice(0, i).concat(gops);
+ };
+ /**
+ * Removes gop information in buffer that overlaps with provided start and end
+ *
+ * @param {Array} buffer
+ * The current buffer of gop information
+ * @param {Double} start
+ * position to start the remove at
+ * @param {Double} end
+ * position to end the remove at
+ * @param {Double} mapping
+ * Offset to map display time to stream presentation time
+ */
+
+ const removeGopBuffer = (buffer, start, end, mapping) => {
+ const startPts = Math.ceil((start - mapping) * clock_1);
+ const endPts = Math.ceil((end - mapping) * clock_1);
+ const updatedBuffer = buffer.slice();
+ let i = buffer.length;
+ while (i--) {
+ if (buffer[i].pts <= endPts) {
+ break;
+ }
+ }
+ if (i === -1) {
+ // no removal because end of remove range is before start of buffer
+ return updatedBuffer;
+ }
+ let j = i + 1;
+ while (j--) {
+ if (buffer[j].pts <= startPts) {
+ break;
+ }
+ } // clamp remove range start to 0 index
+
+ j = Math.max(j, 0);
+ updatedBuffer.splice(j, i - j + 1);
+ return updatedBuffer;
+ };
+ const shallowEqual = function (a, b) {
+ // if both are undefined
+ // or one or the other is undefined
+ // they are not equal
+ if (!a && !b || !a && b || a && !b) {
+ return false;
+ } // they are the same object and thus, equal
+
+ if (a === b) {
+ return true;
+ } // sort keys so we can make sure they have
+ // all the same keys later.
+
+ const akeys = Object.keys(a).sort();
+ const bkeys = Object.keys(b).sort(); // different number of keys, not equal
+
+ if (akeys.length !== bkeys.length) {
+ return false;
+ }
+ for (let i = 0; i < akeys.length; i++) {
+ const key = akeys[i]; // different sorted keys, not equal
+
+ if (key !== bkeys[i]) {
+ return false;
+ } // different values, not equal
+
+ if (a[key] !== b[key]) {
+ return false;
+ }
+ }
+ return true;
+ };
+
+ // https://www.w3.org/TR/WebIDL-1/#quotaexceedederror
+ const QUOTA_EXCEEDED_ERR = 22;
+
+ /**
+ * The segment loader has no recourse except to fetch a segment in the
+ * current playlist and use the internal timestamps in that segment to
+ * generate a syncPoint. This function returns a good candidate index
+ * for that process.
+ *
+ * @param {Array} segments - the segments array from a playlist.
+ * @return {number} An index of a segment from the playlist to load
+ */
+
+ const getSyncSegmentCandidate = function (currentTimeline, segments, targetTime) {
+ segments = segments || [];
+ const timelineSegments = [];
+ let time = 0;
+ for (let i = 0; i < segments.length; i++) {
+ const segment = segments[i];
+ if (currentTimeline === segment.timeline) {
+ timelineSegments.push(i);
+ time += segment.duration;
+ if (time > targetTime) {
+ return i;
+ }
+ }
+ }
+ if (timelineSegments.length === 0) {
+ return 0;
+ } // default to the last timeline segment
+
+ return timelineSegments[timelineSegments.length - 1];
+ }; // In the event of a quota exceeded error, keep at least one second of back buffer. This
+ // number was arbitrarily chosen and may be updated in the future, but seemed reasonable
+ // as a start to prevent any potential issues with removing content too close to the
+ // playhead.
+
+ const MIN_BACK_BUFFER = 1; // in ms
+
+ const CHECK_BUFFER_DELAY = 500;
+ const finite = num => typeof num === 'number' && isFinite(num); // With most content hovering around 30fps, if a segment has a duration less than a half
+ // frame at 30fps or one frame at 60fps, the bandwidth and throughput calculations will
+ // not accurately reflect the rest of the content.
+
+ const MIN_SEGMENT_DURATION_TO_SAVE_STATS = 1 / 60;
+ const illegalMediaSwitch = (loaderType, startingMedia, trackInfo) => {
+ // Although these checks should most likely cover non 'main' types, for now it narrows
+ // the scope of our checks.
+ if (loaderType !== 'main' || !startingMedia || !trackInfo) {
+ return null;
+ }
+ if (!trackInfo.hasAudio && !trackInfo.hasVideo) {
+ return 'Neither audio nor video found in segment.';
+ }
+ if (startingMedia.hasVideo && !trackInfo.hasVideo) {
+ return 'Only audio found in segment when we expected video.' + ' We can\'t switch to audio only from a stream that had video.' + ' To get rid of this message, please add codec information to the manifest.';
+ }
+ if (!startingMedia.hasVideo && trackInfo.hasVideo) {
+ return 'Video found in segment when we expected only audio.' + ' We can\'t switch to a stream with video from an audio only stream.' + ' To get rid of this message, please add codec information to the manifest.';
+ }
+ return null;
+ };
+ /**
+ * Calculates a time value that is safe to remove from the back buffer without interrupting
+ * playback.
+ *
+ * @param {TimeRange} seekable
+ * The current seekable range
+ * @param {number} currentTime
+ * The current time of the player
+ * @param {number} targetDuration
+ * The target duration of the current playlist
+ * @return {number}
+ * Time that is safe to remove from the back buffer without interrupting playback
+ */
+
+ const safeBackBufferTrimTime = (seekable, currentTime, targetDuration) => {
+ // 30 seconds before the playhead provides a safe default for trimming.
+ //
+ // Choosing a reasonable default is particularly important for high bitrate content and
+ // VOD videos/live streams with large windows, as the buffer may end up overfilled and
+ // throw an APPEND_BUFFER_ERR.
+ let trimTime = currentTime - Config.BACK_BUFFER_LENGTH;
+ if (seekable.length) {
+ // Some live playlists may have a shorter window of content than the full allowed back
+ // buffer. For these playlists, don't save content that's no longer within the window.
+ trimTime = Math.max(trimTime, seekable.start(0));
+ } // Don't remove within target duration of the current time to avoid the possibility of
+ // removing the GOP currently being played, as removing it can cause playback stalls.
+
+ const maxTrimTime = currentTime - targetDuration;
+ return Math.min(maxTrimTime, trimTime);
+ };
+ const segmentInfoString = segmentInfo => {
+ const {
+ startOfSegment,
+ duration,
+ segment,
+ part,
+ playlist: {
+ mediaSequence: seq,
+ id,
+ segments = []
+ },
+ mediaIndex: index,
+ partIndex,
+ timeline
+ } = segmentInfo;
+ const segmentLen = segments.length - 1;
+ let selection = 'mediaIndex/partIndex increment';
+ if (segmentInfo.getMediaInfoForTime) {
+ selection = `getMediaInfoForTime (${segmentInfo.getMediaInfoForTime})`;
+ } else if (segmentInfo.isSyncRequest) {
+ selection = 'getSyncSegmentCandidate (isSyncRequest)';
+ }
+ if (segmentInfo.independent) {
+ selection += ` with independent ${segmentInfo.independent}`;
+ }
+ const hasPartIndex = typeof partIndex === 'number';
+ const name = segmentInfo.segment.uri ? 'segment' : 'pre-segment';
+ const zeroBasedPartCount = hasPartIndex ? getKnownPartCount({
+ preloadSegment: segment
+ }) - 1 : 0;
+ return `${name} [${seq + index}/${seq + segmentLen}]` + (hasPartIndex ? ` part [${partIndex}/${zeroBasedPartCount}]` : '') + ` segment start/end [${segment.start} => ${segment.end}]` + (hasPartIndex ? ` part start/end [${part.start} => ${part.end}]` : '') + ` startOfSegment [${startOfSegment}]` + ` duration [${duration}]` + ` timeline [${timeline}]` + ` selected by [${selection}]` + ` playlist [${id}]`;
+ };
+ const timingInfoPropertyForMedia = mediaType => `${mediaType}TimingInfo`;
+ /**
+ * Returns the timestamp offset to use for the segment.
+ *
+ * @param {number} segmentTimeline
+ * The timeline of the segment
+ * @param {number} currentTimeline
+ * The timeline currently being followed by the loader
+ * @param {number} startOfSegment
+ * The estimated segment start
+ * @param {TimeRange[]} buffered
+ * The loader's buffer
+ * @param {boolean} overrideCheck
+ * If true, no checks are made to see if the timestamp offset value should be set,
+ * but sets it directly to a value.
+ *
+ * @return {number|null}
+ * Either a number representing a new timestamp offset, or null if the segment is
+ * part of the same timeline
+ */
+
+ const timestampOffsetForSegment = ({
+ segmentTimeline,
+ currentTimeline,
+ startOfSegment,
+ buffered,
+ overrideCheck
+ }) => {
+ // Check to see if we are crossing a discontinuity to see if we need to set the
+ // timestamp offset on the transmuxer and source buffer.
+ //
+ // Previously, we changed the timestampOffset if the start of this segment was less than
+ // the currently set timestampOffset, but this isn't desirable as it can produce bad
+ // behavior, especially around long running live streams.
+ if (!overrideCheck && segmentTimeline === currentTimeline) {
+ return null;
+ } // When changing renditions, it's possible to request a segment on an older timeline. For
+ // instance, given two renditions with the following:
+ //
+ // #EXTINF:10
+ // segment1
+ // #EXT-X-DISCONTINUITY
+ // #EXTINF:10
+ // segment2
+ // #EXTINF:10
+ // segment3
+ //
+ // And the current player state:
+ //
+ // current time: 8
+ // buffer: 0 => 20
+ //
+ // The next segment on the current rendition would be segment3, filling the buffer from
+ // 20s onwards. However, if a rendition switch happens after segment2 was requested,
+ // then the next segment to be requested will be segment1 from the new rendition in
+ // order to fill time 8 and onwards. Using the buffered end would result in repeated
+ // content (since it would position segment1 of the new rendition starting at 20s). This
+ // case can be identified when the new segment's timeline is a prior value. Instead of
+ // using the buffered end, the startOfSegment can be used, which, hopefully, will be
+ // more accurate to the actual start time of the segment.
+
+ if (segmentTimeline < currentTimeline) {
+ return startOfSegment;
+ } // segmentInfo.startOfSegment used to be used as the timestamp offset, however, that
+ // value uses the end of the last segment if it is available. While this value
+ // should often be correct, it's better to rely on the buffered end, as the new
+ // content post discontinuity should line up with the buffered end as if it were
+ // time 0 for the new content.
+
+ return buffered.length ? buffered.end(buffered.length - 1) : startOfSegment;
+ };
+ /**
+ * Returns whether or not the loader should wait for a timeline change from the timeline
+ * change controller before processing the segment.
+ *
+ * Primary timing in VHS goes by video. This is different from most media players, as
+ * audio is more often used as the primary timing source. For the foreseeable future, VHS
+ * will continue to use video as the primary timing source, due to the current logic and
+ * expectations built around it.
+
+ * Since the timing follows video, in order to maintain sync, the video loader is
+ * responsible for setting both audio and video source buffer timestamp offsets.
+ *
+ * Setting different values for audio and video source buffers could lead to
+ * desyncing. The following examples demonstrate some of the situations where this
+ * distinction is important. Note that all of these cases involve demuxed content. When
+ * content is muxed, the audio and video are packaged together, therefore syncing
+ * separate media playlists is not an issue.
+ *
+ * CASE 1: Audio prepares to load a new timeline before video:
+ *
+ * Timeline: 0 1
+ * Audio Segments: 0 1 2 3 4 5 DISCO 6 7 8 9
+ * Audio Loader: ^
+ * Video Segments: 0 1 2 3 4 5 DISCO 6 7 8 9
+ * Video Loader ^
+ *
+ * In the above example, the audio loader is preparing to load the 6th segment, the first
+ * after a discontinuity, while the video loader is still loading the 5th segment, before
+ * the discontinuity.
+ *
+ * If the audio loader goes ahead and loads and appends the 6th segment before the video
+ * loader crosses the discontinuity, then when appended, the 6th audio segment will use
+ * the timestamp offset from timeline 0. This will likely lead to desyncing. In addition,
+ * the audio loader must provide the audioAppendStart value to trim the content in the
+ * transmuxer, and that value relies on the audio timestamp offset. Since the audio
+ * timestamp offset is set by the video (main) loader, the audio loader shouldn't load the
+ * segment until that value is provided.
+ *
+ * CASE 2: Video prepares to load a new timeline before audio:
+ *
+ * Timeline: 0 1
+ * Audio Segments: 0 1 2 3 4 5 DISCO 6 7 8 9
+ * Audio Loader: ^
+ * Video Segments: 0 1 2 3 4 5 DISCO 6 7 8 9
+ * Video Loader ^
+ *
+ * In the above example, the video loader is preparing to load the 6th segment, the first
+ * after a discontinuity, while the audio loader is still loading the 5th segment, before
+ * the discontinuity.
+ *
+ * If the video loader goes ahead and loads and appends the 6th segment, then once the
+ * segment is loaded and processed, both the video and audio timestamp offsets will be
+ * set, since video is used as the primary timing source. This is to ensure content lines
+ * up appropriately, as any modifications to the video timing are reflected by audio when
+ * the video loader sets the audio and video timestamp offsets to the same value. However,
+ * setting the timestamp offset for audio before audio has had a chance to change
+ * timelines will likely lead to desyncing, as the audio loader will append segment 5 with
+ * a timestamp intended to apply to segments from timeline 1 rather than timeline 0.
+ *
+ * CASE 3: When seeking, audio prepares to load a new timeline before video
+ *
+ * Timeline: 0 1
+ * Audio Segments: 0 1 2 3 4 5 DISCO 6 7 8 9
+ * Audio Loader: ^
+ * Video Segments: 0 1 2 3 4 5 DISCO 6 7 8 9
+ * Video Loader ^
+ *
+ * In the above example, both audio and video loaders are loading segments from timeline
+ * 0, but imagine that the seek originated from timeline 1.
+ *
+ * When seeking to a new timeline, the timestamp offset will be set based on the expected
+ * segment start of the loaded video segment. In order to maintain sync, the audio loader
+ * must wait for the video loader to load its segment and update both the audio and video
+ * timestamp offsets before it may load and append its own segment. This is the case
+ * whether the seek results in a mismatched segment request (e.g., the audio loader
+ * chooses to load segment 3 and the video loader chooses to load segment 4) or the
+ * loaders choose to load the same segment index from each playlist, as the segments may
+ * not be aligned perfectly, even for matching segment indexes.
+ *
+ * @param {Object} timelinechangeController
+ * @param {number} currentTimeline
+ * The timeline currently being followed by the loader
+ * @param {number} segmentTimeline
+ * The timeline of the segment being loaded
+ * @param {('main'|'audio')} loaderType
+ * The loader type
+ * @param {boolean} audioDisabled
+ * Whether the audio is disabled for the loader. This should only be true when the
+ * loader may have muxed audio in its segment, but should not append it, e.g., for
+ * the main loader when an alternate audio playlist is active.
+ *
+ * @return {boolean}
+ * Whether the loader should wait for a timeline change from the timeline change
+ * controller before processing the segment
+ */
+
+ const shouldWaitForTimelineChange = ({
+ timelineChangeController,
+ currentTimeline,
+ segmentTimeline,
+ loaderType,
+ audioDisabled
+ }) => {
+ if (currentTimeline === segmentTimeline) {
+ return false;
+ }
+ if (loaderType === 'audio') {
+ const lastMainTimelineChange = timelineChangeController.lastTimelineChange({
+ type: 'main'
+ }); // Audio loader should wait if:
+ //
+ // * main hasn't had a timeline change yet (thus has not loaded its first segment)
+ // * main hasn't yet changed to the timeline audio is looking to load
+
+ return !lastMainTimelineChange || lastMainTimelineChange.to !== segmentTimeline;
+ } // The main loader only needs to wait for timeline changes if there's demuxed audio.
+ // Otherwise, there's nothing to wait for, since audio would be muxed into the main
+ // loader's segments (or the content is audio/video only and handled by the main
+ // loader).
+
+ if (loaderType === 'main' && audioDisabled) {
+ const pendingAudioTimelineChange = timelineChangeController.pendingTimelineChange({
+ type: 'audio'
+ }); // Main loader should wait for the audio loader if audio is not pending a timeline
+ // change to the current timeline.
+ //
+ // Since the main loader is responsible for setting the timestamp offset for both
+ // audio and video, the main loader must wait for audio to be about to change to its
+ // timeline before setting the offset, otherwise, if audio is behind in loading,
+ // segments from the previous timeline would be adjusted by the new timestamp offset.
+ //
+ // This requirement means that video will not cross a timeline until the audio is
+ // about to cross to it, so that way audio and video will always cross the timeline
+ // together.
+ //
+ // In addition to normal timeline changes, these rules also apply to the start of a
+ // stream (going from a non-existent timeline, -1, to timeline 0). It's important
+ // that these rules apply to the first timeline change because if they did not, it's
+ // possible that the main loader will cross two timelines before the audio loader has
+ // crossed one. Logic may be implemented to handle the startup as a special case, but
+ // it's easier to simply treat all timeline changes the same.
+
+ if (pendingAudioTimelineChange && pendingAudioTimelineChange.to === segmentTimeline) {
+ return false;
+ }
+ return true;
+ }
+ return false;
+ };
+ const mediaDuration = timingInfos => {
+ let maxDuration = 0;
+ ['video', 'audio'].forEach(function (type) {
+ const typeTimingInfo = timingInfos[`${type}TimingInfo`];
+ if (!typeTimingInfo) {
+ return;
+ }
+ const {
+ start,
+ end
+ } = typeTimingInfo;
+ let duration;
+ if (typeof start === 'bigint' || typeof end === 'bigint') {
+ duration = window.BigInt(end) - window.BigInt(start);
+ } else if (typeof start === 'number' && typeof end === 'number') {
+ duration = end - start;
+ }
+ if (typeof duration !== 'undefined' && duration > maxDuration) {
+ maxDuration = duration;
+ }
+ }); // convert back to a number if it is lower than MAX_SAFE_INTEGER
+ // as we only need BigInt when we are above that.
+
+ if (typeof maxDuration === 'bigint' && maxDuration < Number.MAX_SAFE_INTEGER) {
+ maxDuration = Number(maxDuration);
+ }
+ return maxDuration;
+ };
+ const segmentTooLong = ({
+ segmentDuration,
+ maxDuration
+ }) => {
+ // 0 duration segments are most likely due to metadata only segments or a lack of
+ // information.
+ if (!segmentDuration) {
+ return false;
+ } // For HLS:
+ //
+ // https://tools.ietf.org/html/draft-pantos-http-live-streaming-23#section-4.3.3.1
+ // The EXTINF duration of each Media Segment in the Playlist
+ // file, when rounded to the nearest integer, MUST be less than or equal
+ // to the target duration; longer segments can trigger playback stalls
+ // or other errors.
+ //
+ // For DASH, the mpd-parser uses the largest reported segment duration as the target
+ // duration. Although that reported duration is occasionally approximate (i.e., not
+ // exact), a strict check may report that a segment is too long more often in DASH.
+
+ return Math.round(segmentDuration) > maxDuration + TIME_FUDGE_FACTOR;
+ };
+ const getTroublesomeSegmentDurationMessage = (segmentInfo, sourceType) => {
+ // Right now we aren't following DASH's timing model exactly, so only perform
+ // this check for HLS content.
+ if (sourceType !== 'hls') {
+ return null;
+ }
+ const segmentDuration = mediaDuration({
+ audioTimingInfo: segmentInfo.audioTimingInfo,
+ videoTimingInfo: segmentInfo.videoTimingInfo
+ }); // Don't report if we lack information.
+ //
+ // If the segment has a duration of 0 it is either a lack of information or a
+ // metadata only segment and shouldn't be reported here.
+
+ if (!segmentDuration) {
+ return null;
+ }
+ const targetDuration = segmentInfo.playlist.targetDuration;
+ const isSegmentWayTooLong = segmentTooLong({
+ segmentDuration,
+ maxDuration: targetDuration * 2
+ });
+ const isSegmentSlightlyTooLong = segmentTooLong({
+ segmentDuration,
+ maxDuration: targetDuration
+ });
+ const segmentTooLongMessage = `Segment with index ${segmentInfo.mediaIndex} ` + `from playlist ${segmentInfo.playlist.id} ` + `has a duration of ${segmentDuration} ` + `when the reported duration is ${segmentInfo.duration} ` + `and the target duration is ${targetDuration}. ` + 'For HLS content, a duration in excess of the target duration may result in ' + 'playback issues. See the HLS specification section on EXT-X-TARGETDURATION for ' + 'more details: ' + 'https://tools.ietf.org/html/draft-pantos-http-live-streaming-23#section-4.3.3.1';
+ if (isSegmentWayTooLong || isSegmentSlightlyTooLong) {
+ return {
+ severity: isSegmentWayTooLong ? 'warn' : 'info',
+ message: segmentTooLongMessage
+ };
+ }
+ return null;
+ };
+ /**
+ * An object that manages segment loading and appending.
+ *
+ * @class SegmentLoader
+ * @param {Object} options required and optional options
+ * @extends videojs.EventTarget
+ */
+
+ class SegmentLoader extends videojs.EventTarget {
+ constructor(settings, options = {}) {
+ super(); // check pre-conditions
+
+ if (!settings) {
+ throw new TypeError('Initialization settings are required');
+ }
+ if (typeof settings.currentTime !== 'function') {
+ throw new TypeError('No currentTime getter specified');
+ }
+ if (!settings.mediaSource) {
+ throw new TypeError('No MediaSource specified');
+ } // public properties
+
+ this.bandwidth = settings.bandwidth;
+ this.throughput = {
+ rate: 0,
+ count: 0
+ };
+ this.roundTrip = NaN;
+ this.resetStats_();
+ this.mediaIndex = null;
+ this.partIndex = null; // private settings
+
+ this.hasPlayed_ = settings.hasPlayed;
+ this.currentTime_ = settings.currentTime;
+ this.seekable_ = settings.seekable;
+ this.seeking_ = settings.seeking;
+ this.duration_ = settings.duration;
+ this.mediaSource_ = settings.mediaSource;
+ this.vhs_ = settings.vhs;
+ this.loaderType_ = settings.loaderType;
+ this.currentMediaInfo_ = void 0;
+ this.startingMediaInfo_ = void 0;
+ this.segmentMetadataTrack_ = settings.segmentMetadataTrack;
+ this.goalBufferLength_ = settings.goalBufferLength;
+ this.sourceType_ = settings.sourceType;
+ this.sourceUpdater_ = settings.sourceUpdater;
+ this.inbandTextTracks_ = settings.inbandTextTracks;
+ this.state_ = 'INIT';
+ this.timelineChangeController_ = settings.timelineChangeController;
+ this.shouldSaveSegmentTimingInfo_ = true;
+ this.parse708captions_ = settings.parse708captions;
+ this.useDtsForTimestampOffset_ = settings.useDtsForTimestampOffset;
+ this.captionServices_ = settings.captionServices;
+ this.exactManifestTimings = settings.exactManifestTimings;
+ this.addMetadataToTextTrack = settings.addMetadataToTextTrack; // private instance variables
+
+ this.checkBufferTimeout_ = null;
+ this.error_ = void 0;
+ this.currentTimeline_ = -1;
+ this.shouldForceTimestampOffsetAfterResync_ = false;
+ this.pendingSegment_ = null;
+ this.xhrOptions_ = null;
+ this.pendingSegments_ = [];
+ this.audioDisabled_ = false;
+ this.isPendingTimestampOffset_ = false; // TODO possibly move gopBuffer and timeMapping info to a separate controller
+
+ this.gopBuffer_ = [];
+ this.timeMapping_ = 0;
+ this.safeAppend_ = false;
+ this.appendInitSegment_ = {
+ audio: true,
+ video: true
+ };
+ this.playlistOfLastInitSegment_ = {
+ audio: null,
+ video: null
+ };
+ this.callQueue_ = []; // If the segment loader prepares to load a segment, but does not have enough
+ // information yet to start the loading process (e.g., if the audio loader wants to
+ // load a segment from the next timeline but the main loader hasn't yet crossed that
+ // timeline), then the load call will be added to the queue until it is ready to be
+ // processed.
+
+ this.loadQueue_ = [];
+ this.metadataQueue_ = {
+ id3: [],
+ caption: []
+ };
+ this.waitingOnRemove_ = false;
+ this.quotaExceededErrorRetryTimeout_ = null; // Fragmented mp4 playback
+
+ this.activeInitSegmentId_ = null;
+ this.initSegments_ = {}; // HLSe playback
+
+ this.cacheEncryptionKeys_ = settings.cacheEncryptionKeys;
+ this.keyCache_ = {};
+ this.decrypter_ = settings.decrypter; // Manages the tracking and generation of sync-points, mappings
+ // between a time in the display time and a segment index within
+ // a playlist
+
+ this.syncController_ = settings.syncController;
+ this.syncPoint_ = {
+ segmentIndex: 0,
+ time: 0
+ };
+ this.transmuxer_ = this.createTransmuxer_();
+ this.triggerSyncInfoUpdate_ = () => this.trigger('syncinfoupdate');
+ this.syncController_.on('syncinfoupdate', this.triggerSyncInfoUpdate_);
+ this.mediaSource_.addEventListener('sourceopen', () => {
+ if (!this.isEndOfStream_()) {
+ this.ended_ = false;
+ }
+ }); // ...for determining the fetch location
+
+ this.fetchAtBuffer_ = false;
+ this.logger_ = logger(`SegmentLoader[${this.loaderType_}]`);
+ Object.defineProperty(this, 'state', {
+ get() {
+ return this.state_;
+ },
+ set(newState) {
+ if (newState !== this.state_) {
+ this.logger_(`${this.state_} -> ${newState}`);
+ this.state_ = newState;
+ this.trigger('statechange');
+ }
+ }
+ });
+ this.sourceUpdater_.on('ready', () => {
+ if (this.hasEnoughInfoToAppend_()) {
+ this.processCallQueue_();
+ }
+ }); // Only the main loader needs to listen for pending timeline changes, as the main
+ // loader should wait for audio to be ready to change its timeline so that both main
+ // and audio timelines change together. For more details, see the
+ // shouldWaitForTimelineChange function.
+
+ if (this.loaderType_ === 'main') {
+ this.timelineChangeController_.on('pendingtimelinechange', () => {
+ if (this.hasEnoughInfoToAppend_()) {
+ this.processCallQueue_();
+ }
+ });
+ } // The main loader only listens on pending timeline changes, but the audio loader,
+ // since its loads follow main, needs to listen on timeline changes. For more details,
+ // see the shouldWaitForTimelineChange function.
+
+ if (this.loaderType_ === 'audio') {
+ this.timelineChangeController_.on('timelinechange', () => {
+ if (this.hasEnoughInfoToLoad_()) {
+ this.processLoadQueue_();
+ }
+ if (this.hasEnoughInfoToAppend_()) {
+ this.processCallQueue_();
+ }
+ });
+ }
+ }
+ /**
+ * TODO: Current sync controller consists of many hls-specific strategies
+ * media sequence sync is also hls-specific, and we would like to be protocol-agnostic on this level
+ * this should be a part of the sync-controller and sync controller should expect different strategy list based on the protocol.
+ *
+ * @return {MediaSequenceSync|null}
+ * @private
+ */
+
+ get mediaSequenceSync_() {
+ return this.syncController_.getMediaSequenceSync(this.loaderType_);
+ }
+ createTransmuxer_() {
+ return segmentTransmuxer.createTransmuxer({
+ remux: false,
+ alignGopsAtEnd: this.safeAppend_,
+ keepOriginalTimestamps: true,
+ parse708captions: this.parse708captions_,
+ captionServices: this.captionServices_
+ });
+ }
+ /**
+ * reset all of our media stats
+ *
+ * @private
+ */
+
+ resetStats_() {
+ this.mediaBytesTransferred = 0;
+ this.mediaRequests = 0;
+ this.mediaRequestsAborted = 0;
+ this.mediaRequestsTimedout = 0;
+ this.mediaRequestsErrored = 0;
+ this.mediaTransferDuration = 0;
+ this.mediaSecondsLoaded = 0;
+ this.mediaAppends = 0;
+ }
+ /**
+ * dispose of the SegmentLoader and reset to the default state
+ */
+
+ dispose() {
+ this.trigger('dispose');
+ this.state = 'DISPOSED';
+ this.pause();
+ this.abort_();
+ if (this.transmuxer_) {
+ this.transmuxer_.terminate();
+ }
+ this.resetStats_();
+ if (this.checkBufferTimeout_) {
+ window.clearTimeout(this.checkBufferTimeout_);
+ }
+ if (this.syncController_ && this.triggerSyncInfoUpdate_) {
+ this.syncController_.off('syncinfoupdate', this.triggerSyncInfoUpdate_);
+ }
+ this.off();
+ }
+ setAudio(enable) {
+ this.audioDisabled_ = !enable;
+ if (enable) {
+ this.appendInitSegment_.audio = true;
+ } else {
+ // remove current track audio if it gets disabled
+ this.sourceUpdater_.removeAudio(0, this.duration_());
+ }
+ }
+ /**
+ * abort anything that is currently doing on with the SegmentLoader
+ * and reset to a default state
+ */
+
+ abort() {
+ if (this.state !== 'WAITING') {
+ if (this.pendingSegment_) {
+ this.pendingSegment_ = null;
+ }
+ return;
+ }
+ this.abort_(); // We aborted the requests we were waiting on, so reset the loader's state to READY
+ // since we are no longer "waiting" on any requests. XHR callback is not always run
+ // when the request is aborted. This will prevent the loader from being stuck in the
+ // WAITING state indefinitely.
+
+ this.state = 'READY'; // don't wait for buffer check timeouts to begin fetching the
+ // next segment
+
+ if (!this.paused()) {
+ this.monitorBuffer_();
+ }
+ }
+ /**
+ * abort all pending xhr requests and null any pending segements
+ *
+ * @private
+ */
+
+ abort_() {
+ if (this.pendingSegment_ && this.pendingSegment_.abortRequests) {
+ this.pendingSegment_.abortRequests();
+ } // clear out the segment being processed
+
+ this.pendingSegment_ = null;
+ this.callQueue_ = [];
+ this.loadQueue_ = [];
+ this.metadataQueue_.id3 = [];
+ this.metadataQueue_.caption = [];
+ this.timelineChangeController_.clearPendingTimelineChange(this.loaderType_);
+ this.waitingOnRemove_ = false;
+ window.clearTimeout(this.quotaExceededErrorRetryTimeout_);
+ this.quotaExceededErrorRetryTimeout_ = null;
+ }
+ checkForAbort_(requestId) {
+ // If the state is APPENDING, then aborts will not modify the state, meaning the first
+ // callback that happens should reset the state to READY so that loading can continue.
+ if (this.state === 'APPENDING' && !this.pendingSegment_) {
+ this.state = 'READY';
+ return true;
+ }
+ if (!this.pendingSegment_ || this.pendingSegment_.requestId !== requestId) {
+ return true;
+ }
+ return false;
+ }
+ /**
+ * set an error on the segment loader and null out any pending segements
+ *
+ * @param {Error} error the error to set on the SegmentLoader
+ * @return {Error} the error that was set or that is currently set
+ */
+
+ error(error) {
+ if (typeof error !== 'undefined') {
+ this.logger_('error occurred:', error);
+ this.error_ = error;
+ }
+ this.pendingSegment_ = null;
+ return this.error_;
+ }
+ endOfStream() {
+ this.ended_ = true;
+ if (this.transmuxer_) {
+ // need to clear out any cached data to prepare for the new segment
+ segmentTransmuxer.reset(this.transmuxer_);
+ }
+ this.gopBuffer_.length = 0;
+ this.pause();
+ this.trigger('ended');
+ }
+ /**
+ * Indicates which time ranges are buffered
+ *
+ * @return {TimeRange}
+ * TimeRange object representing the current buffered ranges
+ */
+
+ buffered_() {
+ const trackInfo = this.getMediaInfo_();
+ if (!this.sourceUpdater_ || !trackInfo) {
+ return createTimeRanges();
+ }
+ if (this.loaderType_ === 'main') {
+ const {
+ hasAudio,
+ hasVideo,
+ isMuxed
+ } = trackInfo;
+ if (hasVideo && hasAudio && !this.audioDisabled_ && !isMuxed) {
+ return this.sourceUpdater_.buffered();
+ }
+ if (hasVideo) {
+ return this.sourceUpdater_.videoBuffered();
+ }
+ } // One case that can be ignored for now is audio only with alt audio,
+ // as we don't yet have proper support for that.
+
+ return this.sourceUpdater_.audioBuffered();
+ }
+ /**
+ * Gets and sets init segment for the provided map
+ *
+ * @param {Object} map
+ * The map object representing the init segment to get or set
+ * @param {boolean=} set
+ * If true, the init segment for the provided map should be saved
+ * @return {Object}
+ * map object for desired init segment
+ */
+
+ initSegmentForMap(map, set = false) {
+ if (!map) {
+ return null;
+ }
+ const id = initSegmentId(map);
+ let storedMap = this.initSegments_[id];
+ if (set && !storedMap && map.bytes) {
+ this.initSegments_[id] = storedMap = {
+ resolvedUri: map.resolvedUri,
+ byterange: map.byterange,
+ bytes: map.bytes,
+ tracks: map.tracks,
+ timescales: map.timescales
+ };
+ }
+ return storedMap || map;
+ }
+ /**
+ * Gets and sets key for the provided key
+ *
+ * @param {Object} key
+ * The key object representing the key to get or set
+ * @param {boolean=} set
+ * If true, the key for the provided key should be saved
+ * @return {Object}
+ * Key object for desired key
+ */
+
+ segmentKey(key, set = false) {
+ if (!key) {
+ return null;
+ }
+ const id = segmentKeyId(key);
+ let storedKey = this.keyCache_[id]; // TODO: We should use the HTTP Expires header to invalidate our cache per
+ // https://tools.ietf.org/html/draft-pantos-http-live-streaming-23#section-6.2.3
+
+ if (this.cacheEncryptionKeys_ && set && !storedKey && key.bytes) {
+ this.keyCache_[id] = storedKey = {
+ resolvedUri: key.resolvedUri,
+ bytes: key.bytes
+ };
+ }
+ const result = {
+ resolvedUri: (storedKey || key).resolvedUri
+ };
+ if (storedKey) {
+ result.bytes = storedKey.bytes;
+ }
+ return result;
+ }
+ /**
+ * Returns true if all configuration required for loading is present, otherwise false.
+ *
+ * @return {boolean} True if the all configuration is ready for loading
+ * @private
+ */
+
+ couldBeginLoading_() {
+ return this.playlist_ && !this.paused();
+ }
+ /**
+ * load a playlist and start to fill the buffer
+ */
+
+ load() {
+ // un-pause
+ this.monitorBuffer_(); // if we don't have a playlist yet, keep waiting for one to be
+ // specified
+
+ if (!this.playlist_) {
+ return;
+ } // if all the configuration is ready, initialize and begin loading
+
+ if (this.state === 'INIT' && this.couldBeginLoading_()) {
+ return this.init_();
+ } // if we're in the middle of processing a segment already, don't
+ // kick off an additional segment request
+
+ if (!this.couldBeginLoading_() || this.state !== 'READY' && this.state !== 'INIT') {
+ return;
+ }
+ this.state = 'READY';
+ }
+ /**
+ * Once all the starting parameters have been specified, begin
+ * operation. This method should only be invoked from the INIT
+ * state.
+ *
+ * @private
+ */
+
+ init_() {
+ this.state = 'READY'; // if this is the audio segment loader, and it hasn't been inited before, then any old
+ // audio data from the muxed content should be removed
+
+ this.resetEverything();
+ return this.monitorBuffer_();
+ }
+ /**
+ * set a playlist on the segment loader
+ *
+ * @param {PlaylistLoader} media the playlist to set on the segment loader
+ */
+
+ playlist(newPlaylist, options = {}) {
+ if (!newPlaylist) {
+ return;
+ }
+ const oldPlaylist = this.playlist_;
+ const segmentInfo = this.pendingSegment_;
+ this.playlist_ = newPlaylist;
+ this.xhrOptions_ = options; // when we haven't started playing yet, the start of a live playlist
+ // is always our zero-time so force a sync update each time the playlist
+ // is refreshed from the server
+ //
+ // Use the INIT state to determine if playback has started, as the playlist sync info
+ // should be fixed once requests begin (as sync points are generated based on sync
+ // info), but not before then.
+
+ if (this.state === 'INIT') {
+ newPlaylist.syncInfo = {
+ mediaSequence: newPlaylist.mediaSequence,
+ time: 0
+ }; // Setting the date time mapping means mapping the program date time (if available)
+ // to time 0 on the player's timeline. The playlist's syncInfo serves a similar
+ // purpose, mapping the initial mediaSequence to time zero. Since the syncInfo can
+ // be updated as the playlist is refreshed before the loader starts loading, the
+ // program date time mapping needs to be updated as well.
+ //
+ // This mapping is only done for the main loader because a program date time should
+ // map equivalently between playlists.
+
+ if (this.loaderType_ === 'main') {
+ this.syncController_.setDateTimeMappingForStart(newPlaylist);
+ }
+ }
+ let oldId = null;
+ if (oldPlaylist) {
+ if (oldPlaylist.id) {
+ oldId = oldPlaylist.id;
+ } else if (oldPlaylist.uri) {
+ oldId = oldPlaylist.uri;
+ }
+ }
+ this.logger_(`playlist update [${oldId} => ${newPlaylist.id || newPlaylist.uri}]`);
+ if (this.mediaSequenceSync_) {
+ this.mediaSequenceSync_.update(newPlaylist, this.currentTime_());
+ this.logger_(`Playlist update:
+currentTime: ${this.currentTime_()}
+bufferedEnd: ${lastBufferedEnd(this.buffered_())}
+`, this.mediaSequenceSync_.diagnostics);
+ } // in VOD, this is always a rendition switch (or we updated our syncInfo above)
+ // in LIVE, we always want to update with new playlists (including refreshes)
+
+ this.trigger('syncinfoupdate'); // if we were unpaused but waiting for a playlist, start
+ // buffering now
+
+ if (this.state === 'INIT' && this.couldBeginLoading_()) {
+ return this.init_();
+ }
+ if (!oldPlaylist || oldPlaylist.uri !== newPlaylist.uri) {
+ if (this.mediaIndex !== null) {
+ // we must reset/resync the segment loader when we switch renditions and
+ // the segment loader is already synced to the previous rendition
+ // We only want to reset the loader here for LLHLS playback, as resetLoader sets fetchAtBuffer_
+ // to false, resulting in fetching segments at currentTime and causing repeated
+ // same-segment requests on playlist change. This erroneously drives up the playback watcher
+ // stalled segment count, as re-requesting segments at the currentTime or browser cached segments
+ // will not change the buffer.
+ // Reference for LLHLS fixes: https://github.com/videojs/http-streaming/pull/1201
+ const isLLHLS = !newPlaylist.endList && typeof newPlaylist.partTargetDuration === 'number';
+ if (isLLHLS) {
+ this.resetLoader();
+ } else {
+ this.resyncLoader();
+ }
+ }
+ this.currentMediaInfo_ = void 0;
+ this.trigger('playlistupdate'); // the rest of this function depends on `oldPlaylist` being defined
+
+ return;
+ } // we reloaded the same playlist so we are in a live scenario
+ // and we will likely need to adjust the mediaIndex
+
+ const mediaSequenceDiff = newPlaylist.mediaSequence - oldPlaylist.mediaSequence;
+ this.logger_(`live window shift [${mediaSequenceDiff}]`); // update the mediaIndex on the SegmentLoader
+ // this is important because we can abort a request and this value must be
+ // equal to the last appended mediaIndex
+
+ if (this.mediaIndex !== null) {
+ this.mediaIndex -= mediaSequenceDiff; // this can happen if we are going to load the first segment, but get a playlist
+ // update during that. mediaIndex would go from 0 to -1 if mediaSequence in the
+ // new playlist was incremented by 1.
+
+ if (this.mediaIndex < 0) {
+ this.mediaIndex = null;
+ this.partIndex = null;
+ } else {
+ const segment = this.playlist_.segments[this.mediaIndex]; // partIndex should remain the same for the same segment
+ // unless parts fell off of the playlist for this segment.
+ // In that case we need to reset partIndex and resync
+
+ if (this.partIndex && (!segment.parts || !segment.parts.length || !segment.parts[this.partIndex])) {
+ const mediaIndex = this.mediaIndex;
+ this.logger_(`currently processing part (index ${this.partIndex}) no longer exists.`);
+ this.resetLoader(); // We want to throw away the partIndex and the data associated with it,
+ // as the part was dropped from our current playlists segment.
+ // The mediaIndex will still be valid so keep that around.
+
+ this.mediaIndex = mediaIndex;
+ }
+ }
+ } // update the mediaIndex on the SegmentInfo object
+ // this is important because we will update this.mediaIndex with this value
+ // in `handleAppendsDone_` after the segment has been successfully appended
+
+ if (segmentInfo) {
+ segmentInfo.mediaIndex -= mediaSequenceDiff;
+ if (segmentInfo.mediaIndex < 0) {
+ segmentInfo.mediaIndex = null;
+ segmentInfo.partIndex = null;
+ } else {
+ // we need to update the referenced segment so that timing information is
+ // saved for the new playlist's segment, however, if the segment fell off the
+ // playlist, we can leave the old reference and just lose the timing info
+ if (segmentInfo.mediaIndex >= 0) {
+ segmentInfo.segment = newPlaylist.segments[segmentInfo.mediaIndex];
+ }
+ if (segmentInfo.partIndex >= 0 && segmentInfo.segment.parts) {
+ segmentInfo.part = segmentInfo.segment.parts[segmentInfo.partIndex];
+ }
+ }
+ }
+ this.syncController_.saveExpiredSegmentInfo(oldPlaylist, newPlaylist);
+ }
+ /**
+ * Prevent the loader from fetching additional segments. If there
+ * is a segment request outstanding, it will finish processing
+ * before the loader halts. A segment loader can be unpaused by
+ * calling load().
+ */
+
+ pause() {
+ if (this.checkBufferTimeout_) {
+ window.clearTimeout(this.checkBufferTimeout_);
+ this.checkBufferTimeout_ = null;
+ }
+ }
+ /**
+ * Returns whether the segment loader is fetching additional
+ * segments when given the opportunity. This property can be
+ * modified through calls to pause() and load().
+ */
+
+ paused() {
+ return this.checkBufferTimeout_ === null;
+ }
+ /**
+ * Delete all the buffered data and reset the SegmentLoader
+ *
+ * @param {Function} [done] an optional callback to be executed when the remove
+ * operation is complete
+ */
+
+ resetEverything(done) {
+ this.ended_ = false;
+ this.activeInitSegmentId_ = null;
+ this.appendInitSegment_ = {
+ audio: true,
+ video: true
+ };
+ this.resetLoader(); // remove from 0, the earliest point, to Infinity, to signify removal of everything.
+ // VTT Segment Loader doesn't need to do anything but in the regular SegmentLoader,
+ // we then clamp the value to duration if necessary.
+
+ this.remove(0, Infinity, done); // clears fmp4 captions
+
+ if (this.transmuxer_) {
+ this.transmuxer_.postMessage({
+ action: 'clearAllMp4Captions'
+ }); // reset the cache in the transmuxer
+
+ this.transmuxer_.postMessage({
+ action: 'reset'
+ });
+ }
+ }
+ /**
+ * Force the SegmentLoader to resync and start loading around the currentTime instead
+ * of starting at the end of the buffer
+ *
+ * Useful for fast quality changes
+ */
+
+ resetLoader() {
+ this.fetchAtBuffer_ = false;
+ if (this.mediaSequenceSync_) {
+ this.mediaSequenceSync_.resetAppendedStatus();
+ }
+ this.resyncLoader();
+ }
+ /**
+ * Force the SegmentLoader to restart synchronization and make a conservative guess
+ * before returning to the simple walk-forward method
+ */
+
+ resyncLoader() {
+ if (this.transmuxer_) {
+ // need to clear out any cached data to prepare for the new segment
+ segmentTransmuxer.reset(this.transmuxer_);
+ }
+ this.mediaIndex = null;
+ this.partIndex = null;
+ this.syncPoint_ = null;
+ this.isPendingTimestampOffset_ = false; // this is mainly to sync timing-info when switching between renditions with and without timestamp-rollover,
+ // so we don't want it for DASH or fragmented mp4 segments.
+
+ const isFmp4 = this.currentMediaInfo_ && this.currentMediaInfo_.isFmp4;
+ const isHlsTs = this.sourceType_ === 'hls' && !isFmp4;
+ if (isHlsTs) {
+ this.shouldForceTimestampOffsetAfterResync_ = true;
+ }
+ this.callQueue_ = [];
+ this.loadQueue_ = [];
+ this.metadataQueue_.id3 = [];
+ this.metadataQueue_.caption = [];
+ this.abort();
+ if (this.transmuxer_) {
+ this.transmuxer_.postMessage({
+ action: 'clearParsedMp4Captions'
+ });
+ }
+ }
+ /**
+ * Remove any data in the source buffer between start and end times
+ *
+ * @param {number} start - the start time of the region to remove from the buffer
+ * @param {number} end - the end time of the region to remove from the buffer
+ * @param {Function} [done] - an optional callback to be executed when the remove
+ * @param {boolean} force - force all remove operations to happen
+ * operation is complete
+ */
+
+ remove(start, end, done = () => {}, force = false) {
+ // clamp end to duration if we need to remove everything.
+ // This is due to a browser bug that causes issues if we remove to Infinity.
+ // videojs/videojs-contrib-hls#1225
+ if (end === Infinity) {
+ end = this.duration_();
+ } // skip removes that would throw an error
+ // commonly happens during a rendition switch at the start of a video
+ // from start 0 to end 0
+
+ if (end <= start) {
+ this.logger_('skipping remove because end ${end} is <= start ${start}');
+ return;
+ }
+ if (!this.sourceUpdater_ || !this.getMediaInfo_()) {
+ this.logger_('skipping remove because no source updater or starting media info'); // nothing to remove if we haven't processed any media
+
+ return;
+ } // set it to one to complete this function's removes
+
+ let removesRemaining = 1;
+ const removeFinished = () => {
+ removesRemaining--;
+ if (removesRemaining === 0) {
+ done();
+ }
+ };
+ if (force || !this.audioDisabled_) {
+ removesRemaining++;
+ this.sourceUpdater_.removeAudio(start, end, removeFinished);
+ } // While it would be better to only remove video if the main loader has video, this
+ // should be safe with audio only as removeVideo will call back even if there's no
+ // video buffer.
+ //
+ // In theory we can check to see if there's video before calling the remove, but in
+ // the event that we're switching between renditions and from video to audio only
+ // (when we add support for that), we may need to clear the video contents despite
+ // what the new media will contain.
+
+ if (force || this.loaderType_ === 'main') {
+ this.gopBuffer_ = removeGopBuffer(this.gopBuffer_, start, end, this.timeMapping_);
+ removesRemaining++;
+ this.sourceUpdater_.removeVideo(start, end, removeFinished);
+ } // remove any captions and ID3 tags
+
+ for (const track in this.inbandTextTracks_) {
+ removeCuesFromTrack(start, end, this.inbandTextTracks_[track]);
+ }
+ removeCuesFromTrack(start, end, this.segmentMetadataTrack_); // finished this function's removes
+
+ removeFinished();
+ }
+ /**
+ * (re-)schedule monitorBufferTick_ to run as soon as possible
+ *
+ * @private
+ */
+
+ monitorBuffer_() {
+ if (this.checkBufferTimeout_) {
+ window.clearTimeout(this.checkBufferTimeout_);
+ }
+ this.checkBufferTimeout_ = window.setTimeout(this.monitorBufferTick_.bind(this), 1);
+ }
+ /**
+ * As long as the SegmentLoader is in the READY state, periodically
+ * invoke fillBuffer_().
+ *
+ * @private
+ */
+
+ monitorBufferTick_() {
+ if (this.state === 'READY') {
+ this.fillBuffer_();
+ }
+ if (this.checkBufferTimeout_) {
+ window.clearTimeout(this.checkBufferTimeout_);
+ }
+ this.checkBufferTimeout_ = window.setTimeout(this.monitorBufferTick_.bind(this), CHECK_BUFFER_DELAY);
+ }
+ /**
+ * fill the buffer with segements unless the sourceBuffers are
+ * currently updating
+ *
+ * Note: this function should only ever be called by monitorBuffer_
+ * and never directly
+ *
+ * @private
+ */
+
+ fillBuffer_() {
+ // TODO since the source buffer maintains a queue, and we shouldn't call this function
+ // except when we're ready for the next segment, this check can most likely be removed
+ if (this.sourceUpdater_.updating()) {
+ return;
+ } // see if we need to begin loading immediately
+
+ const segmentInfo = this.chooseNextRequest_();
+ if (!segmentInfo) {
+ return;
+ }
+ if (typeof segmentInfo.timestampOffset === 'number') {
+ this.isPendingTimestampOffset_ = false;
+ this.timelineChangeController_.pendingTimelineChange({
+ type: this.loaderType_,
+ from: this.currentTimeline_,
+ to: segmentInfo.timeline
+ });
+ }
+ this.loadSegment_(segmentInfo);
+ }
+ /**
+ * Determines if we should call endOfStream on the media source based
+ * on the state of the buffer or if appened segment was the final
+ * segment in the playlist.
+ *
+ * @param {number} [mediaIndex] the media index of segment we last appended
+ * @param {Object} [playlist] a media playlist object
+ * @return {boolean} do we need to call endOfStream on the MediaSource
+ */
+
+ isEndOfStream_(mediaIndex = this.mediaIndex, playlist = this.playlist_, partIndex = this.partIndex) {
+ if (!playlist || !this.mediaSource_) {
+ return false;
+ }
+ const segment = typeof mediaIndex === 'number' && playlist.segments[mediaIndex]; // mediaIndex is zero based but length is 1 based
+
+ const appendedLastSegment = mediaIndex + 1 === playlist.segments.length; // true if there are no parts, or this is the last part.
+
+ const appendedLastPart = !segment || !segment.parts || partIndex + 1 === segment.parts.length; // if we've buffered to the end of the video, we need to call endOfStream
+ // so that MediaSources can trigger the `ended` event when it runs out of
+ // buffered data instead of waiting for me
+
+ return playlist.endList && this.mediaSource_.readyState === 'open' && appendedLastSegment && appendedLastPart;
+ }
+ /**
+ * Determines what request should be made given current segment loader state.
+ *
+ * @return {Object} a request object that describes the segment/part to load
+ */
+
+ chooseNextRequest_() {
+ const buffered = this.buffered_();
+ const bufferedEnd = lastBufferedEnd(buffered) || 0;
+ const bufferedTime = timeAheadOf(buffered, this.currentTime_());
+ const preloaded = !this.hasPlayed_() && bufferedTime >= 1;
+ const haveEnoughBuffer = bufferedTime >= this.goalBufferLength_();
+ const segments = this.playlist_.segments; // return no segment if:
+ // 1. we don't have segments
+ // 2. The video has not yet played and we already downloaded a segment
+ // 3. we already have enough buffered time
+
+ if (!segments.length || preloaded || haveEnoughBuffer) {
+ return null;
+ }
+ this.syncPoint_ = this.syncPoint_ || this.syncController_.getSyncPoint(this.playlist_, this.duration_(), this.currentTimeline_, this.currentTime_(), this.loaderType_);
+ const next = {
+ partIndex: null,
+ mediaIndex: null,
+ startOfSegment: null,
+ playlist: this.playlist_,
+ isSyncRequest: Boolean(!this.syncPoint_)
+ };
+ if (next.isSyncRequest) {
+ next.mediaIndex = getSyncSegmentCandidate(this.currentTimeline_, segments, bufferedEnd);
+ this.logger_(`choose next request. Can not find sync point. Fallback to media Index: ${next.mediaIndex}`);
+ } else if (this.mediaIndex !== null) {
+ const segment = segments[this.mediaIndex];
+ const partIndex = typeof this.partIndex === 'number' ? this.partIndex : -1;
+ next.startOfSegment = segment.end ? segment.end : bufferedEnd;
+ if (segment.parts && segment.parts[partIndex + 1]) {
+ next.mediaIndex = this.mediaIndex;
+ next.partIndex = partIndex + 1;
+ } else {
+ next.mediaIndex = this.mediaIndex + 1;
+ }
+ } else {
+ let segmentIndex;
+ let partIndex;
+ let startTime;
+ const targetTime = this.fetchAtBuffer_ ? bufferedEnd : this.currentTime_();
+ if (this.mediaSequenceSync_) {
+ this.logger_(`chooseNextRequest_ request after Quality Switch:
+For TargetTime: ${targetTime}.
+CurrentTime: ${this.currentTime_()}
+BufferedEnd: ${bufferedEnd}
+Fetch At Buffer: ${this.fetchAtBuffer_}
+`, this.mediaSequenceSync_.diagnostics);
+ }
+ if (this.mediaSequenceSync_ && this.mediaSequenceSync_.isReliable) {
+ const syncInfo = this.getSyncInfoFromMediaSequenceSync_(targetTime);
+ if (!syncInfo) {
+ this.logger_('chooseNextRequest_ - no sync info found using media sequence sync'); // no match
+
+ return null;
+ }
+ this.logger_(`chooseNextRequest_ mediaSequence syncInfo (${syncInfo.start} --> ${syncInfo.end})`);
+ segmentIndex = syncInfo.segmentIndex;
+ partIndex = syncInfo.partIndex;
+ startTime = syncInfo.start;
+ } else {
+ this.logger_('chooseNextRequest_ - fallback to a regular segment selection algorithm, based on a syncPoint.'); // fallback
+
+ const mediaInfoForTime = Playlist.getMediaInfoForTime({
+ exactManifestTimings: this.exactManifestTimings,
+ playlist: this.playlist_,
+ currentTime: targetTime,
+ startingPartIndex: this.syncPoint_.partIndex,
+ startingSegmentIndex: this.syncPoint_.segmentIndex,
+ startTime: this.syncPoint_.time
+ });
+ segmentIndex = mediaInfoForTime.segmentIndex;
+ partIndex = mediaInfoForTime.partIndex;
+ startTime = mediaInfoForTime.startTime;
+ }
+ next.getMediaInfoForTime = this.fetchAtBuffer_ ? `bufferedEnd ${targetTime}` : `currentTime ${targetTime}`;
+ next.mediaIndex = segmentIndex;
+ next.startOfSegment = startTime;
+ next.partIndex = partIndex;
+ this.logger_(`choose next request. Playlist switched and we have a sync point. Media Index: ${next.mediaIndex} `);
+ }
+ const nextSegment = segments[next.mediaIndex];
+ let nextPart = nextSegment && typeof next.partIndex === 'number' && nextSegment.parts && nextSegment.parts[next.partIndex]; // if the next segment index is invalid or
+ // the next partIndex is invalid do not choose a next segment.
+
+ if (!nextSegment || typeof next.partIndex === 'number' && !nextPart) {
+ return null;
+ } // if the next segment has parts, and we don't have a partIndex.
+ // Set partIndex to 0
+
+ if (typeof next.partIndex !== 'number' && nextSegment.parts) {
+ next.partIndex = 0;
+ nextPart = nextSegment.parts[0];
+ } // independentSegments applies to every segment in a playlist. If independentSegments appears in a main playlist,
+ // it applies to each segment in each media playlist.
+ // https://datatracker.ietf.org/doc/html/draft-pantos-http-live-streaming-23#section-4.3.5.1
+
+ const hasIndependentSegments = this.vhs_.playlists && this.vhs_.playlists.main && this.vhs_.playlists.main.independentSegments || this.playlist_.independentSegments; // if we have no buffered data then we need to make sure
+ // that the next part we append is "independent" if possible.
+ // So we check if the previous part is independent, and request
+ // it if it is.
+
+ if (!bufferedTime && nextPart && !hasIndependentSegments && !nextPart.independent) {
+ if (next.partIndex === 0) {
+ const lastSegment = segments[next.mediaIndex - 1];
+ const lastSegmentLastPart = lastSegment.parts && lastSegment.parts.length && lastSegment.parts[lastSegment.parts.length - 1];
+ if (lastSegmentLastPart && lastSegmentLastPart.independent) {
+ next.mediaIndex -= 1;
+ next.partIndex = lastSegment.parts.length - 1;
+ next.independent = 'previous segment';
+ }
+ } else if (nextSegment.parts[next.partIndex - 1].independent) {
+ next.partIndex -= 1;
+ next.independent = 'previous part';
+ }
+ }
+ const ended = this.mediaSource_ && this.mediaSource_.readyState === 'ended'; // do not choose a next segment if all of the following:
+ // 1. this is the last segment in the playlist
+ // 2. end of stream has been called on the media source already
+ // 3. the player is not seeking
+
+ if (next.mediaIndex >= segments.length - 1 && ended && !this.seeking_()) {
+ return null;
+ }
+ if (this.shouldForceTimestampOffsetAfterResync_) {
+ this.shouldForceTimestampOffsetAfterResync_ = false;
+ next.forceTimestampOffset = true;
+ this.logger_('choose next request. Force timestamp offset after loader resync');
+ }
+ return this.generateSegmentInfo_(next);
+ }
+ getSyncInfoFromMediaSequenceSync_(targetTime) {
+ if (!this.mediaSequenceSync_) {
+ return null;
+ } // we should pull the target time to the least available time if we drop out of sync for any reason
+
+ const finalTargetTime = Math.max(targetTime, this.mediaSequenceSync_.start);
+ if (targetTime !== finalTargetTime) {
+ this.logger_(`getSyncInfoFromMediaSequenceSync_. Pulled target time from ${targetTime} to ${finalTargetTime}`);
+ }
+ const mediaSequenceSyncInfo = this.mediaSequenceSync_.getSyncInfoForTime(finalTargetTime);
+ if (!mediaSequenceSyncInfo) {
+ // no match at all
+ return null;
+ }
+ if (!mediaSequenceSyncInfo.isAppended) {
+ // has a perfect match
+ return mediaSequenceSyncInfo;
+ } // has match, but segment was already appended.
+ // attempt to auto-advance to the nearest next segment:
+
+ const nextMediaSequenceSyncInfo = this.mediaSequenceSync_.getSyncInfoForTime(mediaSequenceSyncInfo.end);
+ if (!nextMediaSequenceSyncInfo) {
+ // no match at all
+ return null;
+ }
+ if (nextMediaSequenceSyncInfo.isAppended) {
+ this.logger_('getSyncInfoFromMediaSequenceSync_: We encounter unexpected scenario where next media sequence sync info is also appended!');
+ } // got match with the nearest next segment
+
+ return nextMediaSequenceSyncInfo;
+ }
+ generateSegmentInfo_(options) {
+ const {
+ independent,
+ playlist,
+ mediaIndex,
+ startOfSegment,
+ isSyncRequest,
+ partIndex,
+ forceTimestampOffset,
+ getMediaInfoForTime
+ } = options;
+ const segment = playlist.segments[mediaIndex];
+ const part = typeof partIndex === 'number' && segment.parts[partIndex];
+ const segmentInfo = {
+ requestId: 'segment-loader-' + Math.random(),
+ // resolve the segment URL relative to the playlist
+ uri: part && part.resolvedUri || segment.resolvedUri,
+ // the segment's mediaIndex at the time it was requested
+ mediaIndex,
+ partIndex: part ? partIndex : null,
+ // whether or not to update the SegmentLoader's state with this
+ // segment's mediaIndex
+ isSyncRequest,
+ startOfSegment,
+ // the segment's playlist
+ playlist,
+ // unencrypted bytes of the segment
+ bytes: null,
+ // when a key is defined for this segment, the encrypted bytes
+ encryptedBytes: null,
+ // The target timestampOffset for this segment when we append it
+ // to the source buffer
+ timestampOffset: null,
+ // The timeline that the segment is in
+ timeline: segment.timeline,
+ // The expected duration of the segment in seconds
+ duration: part && part.duration || segment.duration,
+ // retain the segment in case the playlist updates while doing an async process
+ segment,
+ part,
+ byteLength: 0,
+ transmuxer: this.transmuxer_,
+ // type of getMediaInfoForTime that was used to get this segment
+ getMediaInfoForTime,
+ independent
+ };
+ const overrideCheck = typeof forceTimestampOffset !== 'undefined' ? forceTimestampOffset : this.isPendingTimestampOffset_;
+ segmentInfo.timestampOffset = this.timestampOffsetForSegment_({
+ segmentTimeline: segment.timeline,
+ currentTimeline: this.currentTimeline_,
+ startOfSegment,
+ buffered: this.buffered_(),
+ overrideCheck
+ });
+ const audioBufferedEnd = lastBufferedEnd(this.sourceUpdater_.audioBuffered());
+ if (typeof audioBufferedEnd === 'number') {
+ // since the transmuxer is using the actual timing values, but the buffer is
+ // adjusted by the timestamp offset, we must adjust the value here
+ segmentInfo.audioAppendStart = audioBufferedEnd - this.sourceUpdater_.audioTimestampOffset();
+ }
+ if (this.sourceUpdater_.videoBuffered().length) {
+ segmentInfo.gopsToAlignWith = gopsSafeToAlignWith(this.gopBuffer_,
+ // since the transmuxer is using the actual timing values, but the time is
+ // adjusted by the timestmap offset, we must adjust the value here
+ this.currentTime_() - this.sourceUpdater_.videoTimestampOffset(), this.timeMapping_);
+ }
+ return segmentInfo;
+ } // get the timestampoffset for a segment,
+ // added so that vtt segment loader can override and prevent
+ // adding timestamp offsets.
+
+ timestampOffsetForSegment_(options) {
+ return timestampOffsetForSegment(options);
+ }
+ /**
+ * Determines if the network has enough bandwidth to complete the current segment
+ * request in a timely manner. If not, the request will be aborted early and bandwidth
+ * updated to trigger a playlist switch.
+ *
+ * @param {Object} stats
+ * Object containing stats about the request timing and size
+ * @private
+ */
+
+ earlyAbortWhenNeeded_(stats) {
+ if (this.vhs_.tech_.paused() ||
+ // Don't abort if the current playlist is on the lowestEnabledRendition
+ // TODO: Replace using timeout with a boolean indicating whether this playlist is
+ // the lowestEnabledRendition.
+ !this.xhrOptions_.timeout ||
+ // Don't abort if we have no bandwidth information to estimate segment sizes
+ !this.playlist_.attributes.BANDWIDTH) {
+ return;
+ } // Wait at least 1 second since the first byte of data has been received before
+ // using the calculated bandwidth from the progress event to allow the bitrate
+ // to stabilize
+
+ if (Date.now() - (stats.firstBytesReceivedAt || Date.now()) < 1000) {
+ return;
+ }
+ const currentTime = this.currentTime_();
+ const measuredBandwidth = stats.bandwidth;
+ const segmentDuration = this.pendingSegment_.duration;
+ const requestTimeRemaining = Playlist.estimateSegmentRequestTime(segmentDuration, measuredBandwidth, this.playlist_, stats.bytesReceived); // Subtract 1 from the timeUntilRebuffer so we still consider an early abort
+ // if we are only left with less than 1 second when the request completes.
+ // A negative timeUntilRebuffering indicates we are already rebuffering
+
+ const timeUntilRebuffer$1 = timeUntilRebuffer(this.buffered_(), currentTime, this.vhs_.tech_.playbackRate()) - 1; // Only consider aborting early if the estimated time to finish the download
+ // is larger than the estimated time until the player runs out of forward buffer
+
+ if (requestTimeRemaining <= timeUntilRebuffer$1) {
+ return;
+ }
+ const switchCandidate = minRebufferMaxBandwidthSelector({
+ main: this.vhs_.playlists.main,
+ currentTime,
+ bandwidth: measuredBandwidth,
+ duration: this.duration_(),
+ segmentDuration,
+ timeUntilRebuffer: timeUntilRebuffer$1,
+ currentTimeline: this.currentTimeline_,
+ syncController: this.syncController_
+ });
+ if (!switchCandidate) {
+ return;
+ }
+ const rebufferingImpact = requestTimeRemaining - timeUntilRebuffer$1;
+ const timeSavedBySwitching = rebufferingImpact - switchCandidate.rebufferingImpact;
+ let minimumTimeSaving = 0.5; // If we are already rebuffering, increase the amount of variance we add to the
+ // potential round trip time of the new request so that we are not too aggressive
+ // with switching to a playlist that might save us a fraction of a second.
+
+ if (timeUntilRebuffer$1 <= TIME_FUDGE_FACTOR) {
+ minimumTimeSaving = 1;
+ }
+ if (!switchCandidate.playlist || switchCandidate.playlist.uri === this.playlist_.uri || timeSavedBySwitching < minimumTimeSaving) {
+ return;
+ } // set the bandwidth to that of the desired playlist being sure to scale by
+ // BANDWIDTH_VARIANCE and add one so the playlist selector does not exclude it
+ // don't trigger a bandwidthupdate as the bandwidth is artifial
+
+ this.bandwidth = switchCandidate.playlist.attributes.BANDWIDTH * Config.BANDWIDTH_VARIANCE + 1;
+ this.trigger('earlyabort');
+ }
+ handleAbort_(segmentInfo) {
+ this.logger_(`Aborting ${segmentInfoString(segmentInfo)}`);
+ this.mediaRequestsAborted += 1;
+ }
+ /**
+ * XHR `progress` event handler
+ *
+ * @param {Event}
+ * The XHR `progress` event
+ * @param {Object} simpleSegment
+ * A simplified segment object copy
+ * @private
+ */
+
+ handleProgress_(event, simpleSegment) {
+ this.earlyAbortWhenNeeded_(simpleSegment.stats);
+ if (this.checkForAbort_(simpleSegment.requestId)) {
+ return;
+ }
+ this.trigger('progress');
+ }
+ handleTrackInfo_(simpleSegment, trackInfo) {
+ this.earlyAbortWhenNeeded_(simpleSegment.stats);
+ if (this.checkForAbort_(simpleSegment.requestId)) {
+ return;
+ }
+ if (this.checkForIllegalMediaSwitch(trackInfo)) {
+ return;
+ }
+ trackInfo = trackInfo || {}; // When we have track info, determine what media types this loader is dealing with.
+ // Guard against cases where we're not getting track info at all until we are
+ // certain that all streams will provide it.
+
+ if (!shallowEqual(this.currentMediaInfo_, trackInfo)) {
+ this.appendInitSegment_ = {
+ audio: true,
+ video: true
+ };
+ this.startingMediaInfo_ = trackInfo;
+ this.currentMediaInfo_ = trackInfo;
+ this.logger_('trackinfo update', trackInfo);
+ this.trigger('trackinfo');
+ } // trackinfo may cause an abort if the trackinfo
+ // causes a codec change to an unsupported codec.
+
+ if (this.checkForAbort_(simpleSegment.requestId)) {
+ return;
+ } // set trackinfo on the pending segment so that
+ // it can append.
+
+ this.pendingSegment_.trackInfo = trackInfo; // check if any calls were waiting on the track info
+
+ if (this.hasEnoughInfoToAppend_()) {
+ this.processCallQueue_();
+ }
+ }
+ handleTimingInfo_(simpleSegment, mediaType, timeType, time) {
+ this.earlyAbortWhenNeeded_(simpleSegment.stats);
+ if (this.checkForAbort_(simpleSegment.requestId)) {
+ return;
+ }
+ const segmentInfo = this.pendingSegment_;
+ const timingInfoProperty = timingInfoPropertyForMedia(mediaType);
+ segmentInfo[timingInfoProperty] = segmentInfo[timingInfoProperty] || {};
+ segmentInfo[timingInfoProperty][timeType] = time;
+ this.logger_(`timinginfo: ${mediaType} - ${timeType} - ${time}`); // check if any calls were waiting on the timing info
+
+ if (this.hasEnoughInfoToAppend_()) {
+ this.processCallQueue_();
+ }
+ }
+ handleCaptions_(simpleSegment, captionData) {
+ this.earlyAbortWhenNeeded_(simpleSegment.stats);
+ if (this.checkForAbort_(simpleSegment.requestId)) {
+ return;
+ } // This could only happen with fmp4 segments, but
+ // should still not happen in general
+
+ if (captionData.length === 0) {
+ this.logger_('SegmentLoader received no captions from a caption event');
+ return;
+ }
+ const segmentInfo = this.pendingSegment_; // Wait until we have some video data so that caption timing
+ // can be adjusted by the timestamp offset
+
+ if (!segmentInfo.hasAppendedData_) {
+ this.metadataQueue_.caption.push(this.handleCaptions_.bind(this, simpleSegment, captionData));
+ return;
+ }
+ const timestampOffset = this.sourceUpdater_.videoTimestampOffset() === null ? this.sourceUpdater_.audioTimestampOffset() : this.sourceUpdater_.videoTimestampOffset();
+ const captionTracks = {}; // get total start/end and captions for each track/stream
+
+ captionData.forEach(caption => {
+ // caption.stream is actually a track name...
+ // set to the existing values in tracks or default values
+ captionTracks[caption.stream] = captionTracks[caption.stream] || {
+ // Infinity, as any other value will be less than this
+ startTime: Infinity,
+ captions: [],
+ // 0 as an other value will be more than this
+ endTime: 0
+ };
+ const captionTrack = captionTracks[caption.stream];
+ captionTrack.startTime = Math.min(captionTrack.startTime, caption.startTime + timestampOffset);
+ captionTrack.endTime = Math.max(captionTrack.endTime, caption.endTime + timestampOffset);
+ captionTrack.captions.push(caption);
+ });
+ Object.keys(captionTracks).forEach(trackName => {
+ const {
+ startTime,
+ endTime,
+ captions
+ } = captionTracks[trackName];
+ const inbandTextTracks = this.inbandTextTracks_;
+ this.logger_(`adding cues from ${startTime} -> ${endTime} for ${trackName}`);
+ createCaptionsTrackIfNotExists(inbandTextTracks, this.vhs_.tech_, trackName); // clear out any cues that start and end at the same time period for the same track.
+ // We do this because a rendition change that also changes the timescale for captions
+ // will result in captions being re-parsed for certain segments. If we add them again
+ // without clearing we will have two of the same captions visible.
+
+ removeCuesFromTrack(startTime, endTime, inbandTextTracks[trackName]);
+ addCaptionData({
+ captionArray: captions,
+ inbandTextTracks,
+ timestampOffset
+ });
+ }); // Reset stored captions since we added parsed
+ // captions to a text track at this point
+
+ if (this.transmuxer_) {
+ this.transmuxer_.postMessage({
+ action: 'clearParsedMp4Captions'
+ });
+ }
+ }
+ handleId3_(simpleSegment, id3Frames, dispatchType) {
+ this.earlyAbortWhenNeeded_(simpleSegment.stats);
+ if (this.checkForAbort_(simpleSegment.requestId)) {
+ return;
+ }
+ const segmentInfo = this.pendingSegment_; // we need to have appended data in order for the timestamp offset to be set
+
+ if (!segmentInfo.hasAppendedData_) {
+ this.metadataQueue_.id3.push(this.handleId3_.bind(this, simpleSegment, id3Frames, dispatchType));
+ return;
+ }
+ this.addMetadataToTextTrack(dispatchType, id3Frames, this.duration_());
+ }
+ processMetadataQueue_() {
+ this.metadataQueue_.id3.forEach(fn => fn());
+ this.metadataQueue_.caption.forEach(fn => fn());
+ this.metadataQueue_.id3 = [];
+ this.metadataQueue_.caption = [];
+ }
+ processCallQueue_() {
+ const callQueue = this.callQueue_; // Clear out the queue before the queued functions are run, since some of the
+ // functions may check the length of the load queue and default to pushing themselves
+ // back onto the queue.
+
+ this.callQueue_ = [];
+ callQueue.forEach(fun => fun());
+ }
+ processLoadQueue_() {
+ const loadQueue = this.loadQueue_; // Clear out the queue before the queued functions are run, since some of the
+ // functions may check the length of the load queue and default to pushing themselves
+ // back onto the queue.
+
+ this.loadQueue_ = [];
+ loadQueue.forEach(fun => fun());
+ }
+ /**
+ * Determines whether the loader has enough info to load the next segment.
+ *
+ * @return {boolean}
+ * Whether or not the loader has enough info to load the next segment
+ */
+
+ hasEnoughInfoToLoad_() {
+ // Since primary timing goes by video, only the audio loader potentially needs to wait
+ // to load.
+ if (this.loaderType_ !== 'audio') {
+ return true;
+ }
+ const segmentInfo = this.pendingSegment_; // A fill buffer must have already run to establish a pending segment before there's
+ // enough info to load.
+
+ if (!segmentInfo) {
+ return false;
+ } // The first segment can and should be loaded immediately so that source buffers are
+ // created together (before appending). Source buffer creation uses the presence of
+ // audio and video data to determine whether to create audio/video source buffers, and
+ // uses processed (transmuxed or parsed) media to determine the types required.
+
+ if (!this.getCurrentMediaInfo_()) {
+ return true;
+ }
+ if (
+ // Technically, instead of waiting to load a segment on timeline changes, a segment
+ // can be requested and downloaded and only wait before it is transmuxed or parsed.
+ // But in practice, there are a few reasons why it is better to wait until a loader
+ // is ready to append that segment before requesting and downloading:
+ //
+ // 1. Because audio and main loaders cross discontinuities together, if this loader
+ // is waiting for the other to catch up, then instead of requesting another
+ // segment and using up more bandwidth, by not yet loading, more bandwidth is
+ // allotted to the loader currently behind.
+ // 2. media-segment-request doesn't have to have logic to consider whether a segment
+ // is ready to be processed or not, isolating the queueing behavior to the loader.
+ // 3. The audio loader bases some of its segment properties on timing information
+ // provided by the main loader, meaning that, if the logic for waiting on
+ // processing was in media-segment-request, then it would also need to know how
+ // to re-generate the segment information after the main loader caught up.
+ shouldWaitForTimelineChange({
+ timelineChangeController: this.timelineChangeController_,
+ currentTimeline: this.currentTimeline_,
+ segmentTimeline: segmentInfo.timeline,
+ loaderType: this.loaderType_,
+ audioDisabled: this.audioDisabled_
+ })) {
+ return false;
+ }
+ return true;
+ }
+ getCurrentMediaInfo_(segmentInfo = this.pendingSegment_) {
+ return segmentInfo && segmentInfo.trackInfo || this.currentMediaInfo_;
+ }
+ getMediaInfo_(segmentInfo = this.pendingSegment_) {
+ return this.getCurrentMediaInfo_(segmentInfo) || this.startingMediaInfo_;
+ }
+ getPendingSegmentPlaylist() {
+ return this.pendingSegment_ ? this.pendingSegment_.playlist : null;
+ }
+ hasEnoughInfoToAppend_() {
+ if (!this.sourceUpdater_.ready()) {
+ return false;
+ } // If content needs to be removed or the loader is waiting on an append reattempt,
+ // then no additional content should be appended until the prior append is resolved.
+
+ if (this.waitingOnRemove_ || this.quotaExceededErrorRetryTimeout_) {
+ return false;
+ }
+ const segmentInfo = this.pendingSegment_;
+ const trackInfo = this.getCurrentMediaInfo_(); // no segment to append any data for or
+ // we do not have information on this specific
+ // segment yet
+
+ if (!segmentInfo || !trackInfo) {
+ return false;
+ }
+ const {
+ hasAudio,
+ hasVideo,
+ isMuxed
+ } = trackInfo;
+ if (hasVideo && !segmentInfo.videoTimingInfo) {
+ return false;
+ } // muxed content only relies on video timing information for now.
+
+ if (hasAudio && !this.audioDisabled_ && !isMuxed && !segmentInfo.audioTimingInfo) {
+ return false;
+ }
+ if (shouldWaitForTimelineChange({
+ timelineChangeController: this.timelineChangeController_,
+ currentTimeline: this.currentTimeline_,
+ segmentTimeline: segmentInfo.timeline,
+ loaderType: this.loaderType_,
+ audioDisabled: this.audioDisabled_
+ })) {
+ return false;
+ }
+ return true;
+ }
+ handleData_(simpleSegment, result) {
+ this.earlyAbortWhenNeeded_(simpleSegment.stats);
+ if (this.checkForAbort_(simpleSegment.requestId)) {
+ return;
+ } // If there's anything in the call queue, then this data came later and should be
+ // executed after the calls currently queued.
+
+ if (this.callQueue_.length || !this.hasEnoughInfoToAppend_()) {
+ this.callQueue_.push(this.handleData_.bind(this, simpleSegment, result));
+ return;
+ }
+ const segmentInfo = this.pendingSegment_; // update the time mapping so we can translate from display time to media time
+
+ this.setTimeMapping_(segmentInfo.timeline); // for tracking overall stats
+
+ this.updateMediaSecondsLoaded_(segmentInfo.part || segmentInfo.segment); // Note that the state isn't changed from loading to appending. This is because abort
+ // logic may change behavior depending on the state, and changing state too early may
+ // inflate our estimates of bandwidth. In the future this should be re-examined to
+ // note more granular states.
+ // don't process and append data if the mediaSource is closed
+
+ if (this.mediaSource_.readyState === 'closed') {
+ return;
+ } // if this request included an initialization segment, save that data
+ // to the initSegment cache
+
+ if (simpleSegment.map) {
+ simpleSegment.map = this.initSegmentForMap(simpleSegment.map, true); // move over init segment properties to media request
+
+ segmentInfo.segment.map = simpleSegment.map;
+ } // if this request included a segment key, save that data in the cache
+
+ if (simpleSegment.key) {
+ this.segmentKey(simpleSegment.key, true);
+ }
+ segmentInfo.isFmp4 = simpleSegment.isFmp4;
+ segmentInfo.timingInfo = segmentInfo.timingInfo || {};
+ if (segmentInfo.isFmp4) {
+ this.trigger('fmp4');
+ segmentInfo.timingInfo.start = segmentInfo[timingInfoPropertyForMedia(result.type)].start;
+ } else {
+ const trackInfo = this.getCurrentMediaInfo_();
+ const useVideoTimingInfo = this.loaderType_ === 'main' && trackInfo && trackInfo.hasVideo;
+ let firstVideoFrameTimeForData;
+ if (useVideoTimingInfo) {
+ firstVideoFrameTimeForData = segmentInfo.videoTimingInfo.start;
+ } // Segment loader knows more about segment timing than the transmuxer (in certain
+ // aspects), so make any changes required for a more accurate start time.
+ // Don't set the end time yet, as the segment may not be finished processing.
+
+ segmentInfo.timingInfo.start = this.trueSegmentStart_({
+ currentStart: segmentInfo.timingInfo.start,
+ playlist: segmentInfo.playlist,
+ mediaIndex: segmentInfo.mediaIndex,
+ currentVideoTimestampOffset: this.sourceUpdater_.videoTimestampOffset(),
+ useVideoTimingInfo,
+ firstVideoFrameTimeForData,
+ videoTimingInfo: segmentInfo.videoTimingInfo,
+ audioTimingInfo: segmentInfo.audioTimingInfo
+ });
+ } // Init segments for audio and video only need to be appended in certain cases. Now
+ // that data is about to be appended, we can check the final cases to determine
+ // whether we should append an init segment.
+
+ this.updateAppendInitSegmentStatus(segmentInfo, result.type); // Timestamp offset should be updated once we get new data and have its timing info,
+ // as we use the start of the segment to offset the best guess (playlist provided)
+ // timestamp offset.
+
+ this.updateSourceBufferTimestampOffset_(segmentInfo); // if this is a sync request we need to determine whether it should
+ // be appended or not.
+
+ if (segmentInfo.isSyncRequest) {
+ // first save/update our timing info for this segment.
+ // this is what allows us to choose an accurate segment
+ // and the main reason we make a sync request.
+ this.updateTimingInfoEnd_(segmentInfo);
+ this.syncController_.saveSegmentTimingInfo({
+ segmentInfo,
+ shouldSaveTimelineMapping: this.loaderType_ === 'main'
+ });
+ const next = this.chooseNextRequest_(); // If the sync request isn't the segment that would be requested next
+ // after taking into account its timing info, do not append it.
+
+ if (next.mediaIndex !== segmentInfo.mediaIndex || next.partIndex !== segmentInfo.partIndex) {
+ this.logger_('sync segment was incorrect, not appending');
+ return;
+ } // otherwise append it like any other segment as our guess was correct.
+
+ this.logger_('sync segment was correct, appending');
+ } // Save some state so that in the future anything waiting on first append (and/or
+ // timestamp offset(s)) can process immediately. While the extra state isn't optimal,
+ // we need some notion of whether the timestamp offset or other relevant information
+ // has had a chance to be set.
+
+ segmentInfo.hasAppendedData_ = true; // Now that the timestamp offset should be set, we can append any waiting ID3 tags.
+
+ this.processMetadataQueue_();
+ this.appendData_(segmentInfo, result);
+ }
+ updateAppendInitSegmentStatus(segmentInfo, type) {
+ // alt audio doesn't manage timestamp offset
+ if (this.loaderType_ === 'main' && typeof segmentInfo.timestampOffset === 'number' &&
+ // in the case that we're handling partial data, we don't want to append an init
+ // segment for each chunk
+ !segmentInfo.changedTimestampOffset) {
+ // if the timestamp offset changed, the timeline may have changed, so we have to re-
+ // append init segments
+ this.appendInitSegment_ = {
+ audio: true,
+ video: true
+ };
+ }
+ if (this.playlistOfLastInitSegment_[type] !== segmentInfo.playlist) {
+ // make sure we append init segment on playlist changes, in case the media config
+ // changed
+ this.appendInitSegment_[type] = true;
+ }
+ }
+ getInitSegmentAndUpdateState_({
+ type,
+ initSegment,
+ map,
+ playlist
+ }) {
+ // "The EXT-X-MAP tag specifies how to obtain the Media Initialization Section
+ // (Section 3) required to parse the applicable Media Segments. It applies to every
+ // Media Segment that appears after it in the Playlist until the next EXT-X-MAP tag
+ // or until the end of the playlist."
+ // https://tools.ietf.org/html/draft-pantos-http-live-streaming-23#section-4.3.2.5
+ if (map) {
+ const id = initSegmentId(map);
+ if (this.activeInitSegmentId_ === id) {
+ // don't need to re-append the init segment if the ID matches
+ return null;
+ } // a map-specified init segment takes priority over any transmuxed (or otherwise
+ // obtained) init segment
+ //
+ // this also caches the init segment for later use
+
+ initSegment = this.initSegmentForMap(map, true).bytes;
+ this.activeInitSegmentId_ = id;
+ } // We used to always prepend init segments for video, however, that shouldn't be
+ // necessary. Instead, we should only append on changes, similar to what we've always
+ // done for audio. This is more important (though may not be that important) for
+ // frame-by-frame appending for LHLS, simply because of the increased quantity of
+ // appends.
+
+ if (initSegment && this.appendInitSegment_[type]) {
+ // Make sure we track the playlist that we last used for the init segment, so that
+ // we can re-append the init segment in the event that we get data from a new
+ // playlist. Discontinuities and track changes are handled in other sections.
+ this.playlistOfLastInitSegment_[type] = playlist; // Disable future init segment appends for this type. Until a change is necessary.
+
+ this.appendInitSegment_[type] = false; // we need to clear out the fmp4 active init segment id, since
+ // we are appending the muxer init segment
+
+ this.activeInitSegmentId_ = null;
+ return initSegment;
+ }
+ return null;
+ }
+ handleQuotaExceededError_({
+ segmentInfo,
+ type,
+ bytes
+ }, error) {
+ const audioBuffered = this.sourceUpdater_.audioBuffered();
+ const videoBuffered = this.sourceUpdater_.videoBuffered(); // For now we're ignoring any notion of gaps in the buffer, but they, in theory,
+ // should be cleared out during the buffer removals. However, log in case it helps
+ // debug.
+
+ if (audioBuffered.length > 1) {
+ this.logger_('On QUOTA_EXCEEDED_ERR, found gaps in the audio buffer: ' + timeRangesToArray(audioBuffered).join(', '));
+ }
+ if (videoBuffered.length > 1) {
+ this.logger_('On QUOTA_EXCEEDED_ERR, found gaps in the video buffer: ' + timeRangesToArray(videoBuffered).join(', '));
+ }
+ const audioBufferStart = audioBuffered.length ? audioBuffered.start(0) : 0;
+ const audioBufferEnd = audioBuffered.length ? audioBuffered.end(audioBuffered.length - 1) : 0;
+ const videoBufferStart = videoBuffered.length ? videoBuffered.start(0) : 0;
+ const videoBufferEnd = videoBuffered.length ? videoBuffered.end(videoBuffered.length - 1) : 0;
+ if (audioBufferEnd - audioBufferStart <= MIN_BACK_BUFFER && videoBufferEnd - videoBufferStart <= MIN_BACK_BUFFER) {
+ // Can't remove enough buffer to make room for new segment (or the browser doesn't
+ // allow for appends of segments this size). In the future, it may be possible to
+ // split up the segment and append in pieces, but for now, error out this playlist
+ // in an attempt to switch to a more manageable rendition.
+ this.logger_('On QUOTA_EXCEEDED_ERR, single segment too large to append to ' + 'buffer, triggering an error. ' + `Appended byte length: ${bytes.byteLength}, ` + `audio buffer: ${timeRangesToArray(audioBuffered).join(', ')}, ` + `video buffer: ${timeRangesToArray(videoBuffered).join(', ')}, `);
+ this.error({
+ message: 'Quota exceeded error with append of a single segment of content',
+ excludeUntil: Infinity,
+ metadata: {
+ errorType: videojs.Error.SegmentExceedsSourceBufferQuota
+ }
+ });
+ this.trigger('error');
+ return;
+ } // To try to resolve the quota exceeded error, clear back buffer and retry. This means
+ // that the segment-loader should block on future events until this one is handled, so
+ // that it doesn't keep moving onto further segments. Adding the call to the call
+ // queue will prevent further appends until waitingOnRemove_ and
+ // quotaExceededErrorRetryTimeout_ are cleared.
+ //
+ // Note that this will only block the current loader. In the case of demuxed content,
+ // the other load may keep filling as fast as possible. In practice, this should be
+ // OK, as it is a rare case when either audio has a high enough bitrate to fill up a
+ // source buffer, or video fills without enough room for audio to append (and without
+ // the availability of clearing out seconds of back buffer to make room for audio).
+ // But it might still be good to handle this case in the future as a TODO.
+
+ this.waitingOnRemove_ = true;
+ this.callQueue_.push(this.appendToSourceBuffer_.bind(this, {
+ segmentInfo,
+ type,
+ bytes
+ }));
+ const currentTime = this.currentTime_(); // Try to remove as much audio and video as possible to make room for new content
+ // before retrying.
+
+ const timeToRemoveUntil = currentTime - MIN_BACK_BUFFER;
+ this.logger_(`On QUOTA_EXCEEDED_ERR, removing audio/video from 0 to ${timeToRemoveUntil}`);
+ this.remove(0, timeToRemoveUntil, () => {
+ this.logger_(`On QUOTA_EXCEEDED_ERR, retrying append in ${MIN_BACK_BUFFER}s`);
+ this.waitingOnRemove_ = false; // wait the length of time alotted in the back buffer to prevent wasted
+ // attempts (since we can't clear less than the minimum)
+
+ this.quotaExceededErrorRetryTimeout_ = window.setTimeout(() => {
+ this.logger_('On QUOTA_EXCEEDED_ERR, re-processing call queue');
+ this.quotaExceededErrorRetryTimeout_ = null;
+ this.processCallQueue_();
+ }, MIN_BACK_BUFFER * 1000);
+ }, true);
+ }
+ handleAppendError_({
+ segmentInfo,
+ type,
+ bytes
+ }, error) {
+ // if there's no error, nothing to do
+ if (!error) {
+ return;
+ }
+ if (error.code === QUOTA_EXCEEDED_ERR) {
+ this.handleQuotaExceededError_({
+ segmentInfo,
+ type,
+ bytes
+ }); // A quota exceeded error should be recoverable with a future re-append, so no need
+ // to trigger an append error.
+
+ return;
+ }
+ this.logger_('Received non QUOTA_EXCEEDED_ERR on append', error); // If an append errors, we often can't recover.
+ // (see https://w3c.github.io/media-source/#sourcebuffer-append-error).
+ //
+ // Trigger a special error so that it can be handled separately from normal,
+ // recoverable errors.
+
+ this.error({
+ message: `${type} append of ${bytes.length}b failed for segment ` + `#${segmentInfo.mediaIndex} in playlist ${segmentInfo.playlist.id}`,
+ metadata: {
+ errorType: videojs.Error.SegmentAppendError
+ }
+ });
+ this.trigger('appenderror');
+ }
+ appendToSourceBuffer_({
+ segmentInfo,
+ type,
+ initSegment,
+ data,
+ bytes
+ }) {
+ // If this is a re-append, bytes were already created and don't need to be recreated
+ if (!bytes) {
+ const segments = [data];
+ let byteLength = data.byteLength;
+ if (initSegment) {
+ // if the media initialization segment is changing, append it before the content
+ // segment
+ segments.unshift(initSegment);
+ byteLength += initSegment.byteLength;
+ } // Technically we should be OK appending the init segment separately, however, we
+ // haven't yet tested that, and prepending is how we have always done things.
+
+ bytes = concatSegments({
+ bytes: byteLength,
+ segments
+ });
+ }
+ this.sourceUpdater_.appendBuffer({
+ segmentInfo,
+ type,
+ bytes
+ }, this.handleAppendError_.bind(this, {
+ segmentInfo,
+ type,
+ bytes
+ }));
+ }
+ handleSegmentTimingInfo_(type, requestId, segmentTimingInfo) {
+ if (!this.pendingSegment_ || requestId !== this.pendingSegment_.requestId) {
+ return;
+ }
+ const segment = this.pendingSegment_.segment;
+ const timingInfoProperty = `${type}TimingInfo`;
+ if (!segment[timingInfoProperty]) {
+ segment[timingInfoProperty] = {};
+ }
+ segment[timingInfoProperty].transmuxerPrependedSeconds = segmentTimingInfo.prependedContentDuration || 0;
+ segment[timingInfoProperty].transmuxedPresentationStart = segmentTimingInfo.start.presentation;
+ segment[timingInfoProperty].transmuxedDecodeStart = segmentTimingInfo.start.decode;
+ segment[timingInfoProperty].transmuxedPresentationEnd = segmentTimingInfo.end.presentation;
+ segment[timingInfoProperty].transmuxedDecodeEnd = segmentTimingInfo.end.decode; // mainly used as a reference for debugging
+
+ segment[timingInfoProperty].baseMediaDecodeTime = segmentTimingInfo.baseMediaDecodeTime;
+ }
+ appendData_(segmentInfo, result) {
+ const {
+ type,
+ data
+ } = result;
+ if (!data || !data.byteLength) {
+ return;
+ }
+ if (type === 'audio' && this.audioDisabled_) {
+ return;
+ }
+ const initSegment = this.getInitSegmentAndUpdateState_({
+ type,
+ initSegment: result.initSegment,
+ playlist: segmentInfo.playlist,
+ map: segmentInfo.isFmp4 ? segmentInfo.segment.map : null
+ });
+ this.appendToSourceBuffer_({
+ segmentInfo,
+ type,
+ initSegment,
+ data
+ });
+ }
+ /**
+ * load a specific segment from a request into the buffer
+ *
+ * @private
+ */
+
+ loadSegment_(segmentInfo) {
+ this.state = 'WAITING';
+ this.pendingSegment_ = segmentInfo;
+ this.trimBackBuffer_(segmentInfo);
+ if (typeof segmentInfo.timestampOffset === 'number') {
+ if (this.transmuxer_) {
+ this.transmuxer_.postMessage({
+ action: 'clearAllMp4Captions'
+ });
+ }
+ }
+ if (!this.hasEnoughInfoToLoad_()) {
+ this.loadQueue_.push(() => {
+ // regenerate the audioAppendStart, timestampOffset, etc as they
+ // may have changed since this function was added to the queue.
+ const options = _extends$1({}, segmentInfo, {
+ forceTimestampOffset: true
+ });
+ _extends$1(segmentInfo, this.generateSegmentInfo_(options));
+ this.isPendingTimestampOffset_ = false;
+ this.updateTransmuxerAndRequestSegment_(segmentInfo);
+ });
+ return;
+ }
+ this.updateTransmuxerAndRequestSegment_(segmentInfo);
+ }
+ updateTransmuxerAndRequestSegment_(segmentInfo) {
+ // We'll update the source buffer's timestamp offset once we have transmuxed data, but
+ // the transmuxer still needs to be updated before then.
+ //
+ // Even though keepOriginalTimestamps is set to true for the transmuxer, timestamp
+ // offset must be passed to the transmuxer for stream correcting adjustments.
+ if (this.shouldUpdateTransmuxerTimestampOffset_(segmentInfo.timestampOffset)) {
+ this.gopBuffer_.length = 0; // gopsToAlignWith was set before the GOP buffer was cleared
+
+ segmentInfo.gopsToAlignWith = [];
+ this.timeMapping_ = 0; // reset values in the transmuxer since a discontinuity should start fresh
+
+ this.transmuxer_.postMessage({
+ action: 'reset'
+ });
+ this.transmuxer_.postMessage({
+ action: 'setTimestampOffset',
+ timestampOffset: segmentInfo.timestampOffset
+ });
+ }
+ const simpleSegment = this.createSimplifiedSegmentObj_(segmentInfo);
+ const isEndOfStream = this.isEndOfStream_(segmentInfo.mediaIndex, segmentInfo.playlist, segmentInfo.partIndex);
+ const isWalkingForward = this.mediaIndex !== null;
+ const isDiscontinuity = segmentInfo.timeline !== this.currentTimeline_ &&
+ // currentTimeline starts at -1, so we shouldn't end the timeline switching to 0,
+ // the first timeline
+ segmentInfo.timeline > 0;
+ const isEndOfTimeline = isEndOfStream || isWalkingForward && isDiscontinuity;
+ this.logger_(`Requesting
+${compactSegmentUrlDescription(segmentInfo.uri)}
+${segmentInfoString(segmentInfo)}`); // If there's an init segment associated with this segment, but it is not cached (identified by a lack of bytes),
+ // then this init segment has never been seen before and should be appended.
+ //
+ // At this point the content type (audio/video or both) is not yet known, but it should be safe to set
+ // both to true and leave the decision of whether to append the init segment to append time.
+
+ if (simpleSegment.map && !simpleSegment.map.bytes) {
+ this.logger_('going to request init segment.');
+ this.appendInitSegment_ = {
+ video: true,
+ audio: true
+ };
+ }
+ segmentInfo.abortRequests = mediaSegmentRequest({
+ xhr: this.vhs_.xhr,
+ xhrOptions: this.xhrOptions_,
+ decryptionWorker: this.decrypter_,
+ segment: simpleSegment,
+ abortFn: this.handleAbort_.bind(this, segmentInfo),
+ progressFn: this.handleProgress_.bind(this),
+ trackInfoFn: this.handleTrackInfo_.bind(this),
+ timingInfoFn: this.handleTimingInfo_.bind(this),
+ videoSegmentTimingInfoFn: this.handleSegmentTimingInfo_.bind(this, 'video', segmentInfo.requestId),
+ audioSegmentTimingInfoFn: this.handleSegmentTimingInfo_.bind(this, 'audio', segmentInfo.requestId),
+ captionsFn: this.handleCaptions_.bind(this),
+ isEndOfTimeline,
+ endedTimelineFn: () => {
+ this.logger_('received endedtimeline callback');
+ },
+ id3Fn: this.handleId3_.bind(this),
+ dataFn: this.handleData_.bind(this),
+ doneFn: this.segmentRequestFinished_.bind(this),
+ onTransmuxerLog: ({
+ message,
+ level,
+ stream
+ }) => {
+ this.logger_(`${segmentInfoString(segmentInfo)} logged from transmuxer stream ${stream} as a ${level}: ${message}`);
+ }
+ });
+ }
+ /**
+ * trim the back buffer so that we don't have too much data
+ * in the source buffer
+ *
+ * @private
+ *
+ * @param {Object} segmentInfo - the current segment
+ */
+
+ trimBackBuffer_(segmentInfo) {
+ const removeToTime = safeBackBufferTrimTime(this.seekable_(), this.currentTime_(), this.playlist_.targetDuration || 10); // Chrome has a hard limit of 150MB of
+ // buffer and a very conservative "garbage collector"
+ // We manually clear out the old buffer to ensure
+ // we don't trigger the QuotaExceeded error
+ // on the source buffer during subsequent appends
+
+ if (removeToTime > 0) {
+ this.remove(0, removeToTime);
+ }
+ }
+ /**
+ * created a simplified copy of the segment object with just the
+ * information necessary to perform the XHR and decryption
+ *
+ * @private
+ *
+ * @param {Object} segmentInfo - the current segment
+ * @return {Object} a simplified segment object copy
+ */
+
+ createSimplifiedSegmentObj_(segmentInfo) {
+ const segment = segmentInfo.segment;
+ const part = segmentInfo.part;
+ const simpleSegment = {
+ resolvedUri: part ? part.resolvedUri : segment.resolvedUri,
+ byterange: part ? part.byterange : segment.byterange,
+ requestId: segmentInfo.requestId,
+ transmuxer: segmentInfo.transmuxer,
+ audioAppendStart: segmentInfo.audioAppendStart,
+ gopsToAlignWith: segmentInfo.gopsToAlignWith,
+ part: segmentInfo.part
+ };
+ const previousSegment = segmentInfo.playlist.segments[segmentInfo.mediaIndex - 1];
+ if (previousSegment && previousSegment.timeline === segment.timeline) {
+ // The baseStartTime of a segment is used to handle rollover when probing the TS
+ // segment to retrieve timing information. Since the probe only looks at the media's
+ // times (e.g., PTS and DTS values of the segment), and doesn't consider the
+ // player's time (e.g., player.currentTime()), baseStartTime should reflect the
+ // media time as well. transmuxedDecodeEnd represents the end time of a segment, in
+ // seconds of media time, so should be used here. The previous segment is used since
+ // the end of the previous segment should represent the beginning of the current
+ // segment, so long as they are on the same timeline.
+ if (previousSegment.videoTimingInfo) {
+ simpleSegment.baseStartTime = previousSegment.videoTimingInfo.transmuxedDecodeEnd;
+ } else if (previousSegment.audioTimingInfo) {
+ simpleSegment.baseStartTime = previousSegment.audioTimingInfo.transmuxedDecodeEnd;
+ }
+ }
+ if (segment.key) {
+ // if the media sequence is greater than 2^32, the IV will be incorrect
+ // assuming 10s segments, that would be about 1300 years
+ const iv = segment.key.iv || new Uint32Array([0, 0, 0, segmentInfo.mediaIndex + segmentInfo.playlist.mediaSequence]);
+ simpleSegment.key = this.segmentKey(segment.key);
+ simpleSegment.key.iv = iv;
+ }
+ if (segment.map) {
+ simpleSegment.map = this.initSegmentForMap(segment.map);
+ }
+ return simpleSegment;
+ }
+ saveTransferStats_(stats) {
+ // every request counts as a media request even if it has been aborted
+ // or canceled due to a timeout
+ this.mediaRequests += 1;
+ if (stats) {
+ this.mediaBytesTransferred += stats.bytesReceived;
+ this.mediaTransferDuration += stats.roundTripTime;
+ }
+ }
+ saveBandwidthRelatedStats_(duration, stats) {
+ // byteLength will be used for throughput, and should be based on bytes receieved,
+ // which we only know at the end of the request and should reflect total bytes
+ // downloaded rather than just bytes processed from components of the segment
+ this.pendingSegment_.byteLength = stats.bytesReceived;
+ if (duration < MIN_SEGMENT_DURATION_TO_SAVE_STATS) {
+ this.logger_(`Ignoring segment's bandwidth because its duration of ${duration}` + ` is less than the min to record ${MIN_SEGMENT_DURATION_TO_SAVE_STATS}`);
+ return;
+ }
+ this.bandwidth = stats.bandwidth;
+ this.roundTrip = stats.roundTripTime;
+ }
+ handleTimeout_() {
+ // although the VTT segment loader bandwidth isn't really used, it's good to
+ // maintain functinality between segment loaders
+ this.mediaRequestsTimedout += 1;
+ this.bandwidth = 1;
+ this.roundTrip = NaN;
+ this.trigger('bandwidthupdate');
+ this.trigger('timeout');
+ }
+ /**
+ * Handle the callback from the segmentRequest function and set the
+ * associated SegmentLoader state and errors if necessary
+ *
+ * @private
+ */
+
+ segmentRequestFinished_(error, simpleSegment, result) {
+ // TODO handle special cases, e.g., muxed audio/video but only audio in the segment
+ // check the call queue directly since this function doesn't need to deal with any
+ // data, and can continue even if the source buffers are not set up and we didn't get
+ // any data from the segment
+ if (this.callQueue_.length) {
+ this.callQueue_.push(this.segmentRequestFinished_.bind(this, error, simpleSegment, result));
+ return;
+ }
+ this.saveTransferStats_(simpleSegment.stats); // The request was aborted and the SegmentLoader has already been reset
+
+ if (!this.pendingSegment_) {
+ return;
+ } // the request was aborted and the SegmentLoader has already started
+ // another request. this can happen when the timeout for an aborted
+ // request triggers due to a limitation in the XHR library
+ // do not count this as any sort of request or we risk double-counting
+
+ if (simpleSegment.requestId !== this.pendingSegment_.requestId) {
+ return;
+ } // an error occurred from the active pendingSegment_ so reset everything
+
+ if (error) {
+ this.pendingSegment_ = null;
+ this.state = 'READY'; // aborts are not a true error condition and nothing corrective needs to be done
+
+ if (error.code === REQUEST_ERRORS.ABORTED) {
+ return;
+ }
+ this.pause(); // the error is really just that at least one of the requests timed-out
+ // set the bandwidth to a very low value and trigger an ABR switch to
+ // take emergency action
+
+ if (error.code === REQUEST_ERRORS.TIMEOUT) {
+ this.handleTimeout_();
+ return;
+ } // if control-flow has arrived here, then the error is real
+ // emit an error event to exclude the current playlist
+
+ this.mediaRequestsErrored += 1;
+ this.error(error);
+ this.trigger('error');
+ return;
+ }
+ const segmentInfo = this.pendingSegment_; // the response was a success so set any bandwidth stats the request
+ // generated for ABR purposes
+
+ this.saveBandwidthRelatedStats_(segmentInfo.duration, simpleSegment.stats);
+ segmentInfo.endOfAllRequests = simpleSegment.endOfAllRequests;
+ if (result.gopInfo) {
+ this.gopBuffer_ = updateGopBuffer(this.gopBuffer_, result.gopInfo, this.safeAppend_);
+ } // Although we may have already started appending on progress, we shouldn't switch the
+ // state away from loading until we are officially done loading the segment data.
+
+ this.state = 'APPENDING'; // used for testing
+
+ this.trigger('appending');
+ this.waitForAppendsToComplete_(segmentInfo);
+ }
+ setTimeMapping_(timeline) {
+ const timelineMapping = this.syncController_.mappingForTimeline(timeline);
+ if (timelineMapping !== null) {
+ this.timeMapping_ = timelineMapping;
+ }
+ }
+ updateMediaSecondsLoaded_(segment) {
+ if (typeof segment.start === 'number' && typeof segment.end === 'number') {
+ this.mediaSecondsLoaded += segment.end - segment.start;
+ } else {
+ this.mediaSecondsLoaded += segment.duration;
+ }
+ }
+ shouldUpdateTransmuxerTimestampOffset_(timestampOffset) {
+ if (timestampOffset === null) {
+ return false;
+ } // note that we're potentially using the same timestamp offset for both video and
+ // audio
+
+ if (this.loaderType_ === 'main' && timestampOffset !== this.sourceUpdater_.videoTimestampOffset()) {
+ return true;
+ }
+ if (!this.audioDisabled_ && timestampOffset !== this.sourceUpdater_.audioTimestampOffset()) {
+ return true;
+ }
+ return false;
+ }
+ trueSegmentStart_({
+ currentStart,
+ playlist,
+ mediaIndex,
+ firstVideoFrameTimeForData,
+ currentVideoTimestampOffset,
+ useVideoTimingInfo,
+ videoTimingInfo,
+ audioTimingInfo
+ }) {
+ if (typeof currentStart !== 'undefined') {
+ // if start was set once, keep using it
+ return currentStart;
+ }
+ if (!useVideoTimingInfo) {
+ return audioTimingInfo.start;
+ }
+ const previousSegment = playlist.segments[mediaIndex - 1]; // The start of a segment should be the start of the first full frame contained
+ // within that segment. Since the transmuxer maintains a cache of incomplete data
+ // from and/or the last frame seen, the start time may reflect a frame that starts
+ // in the previous segment. Check for that case and ensure the start time is
+ // accurate for the segment.
+
+ if (mediaIndex === 0 || !previousSegment || typeof previousSegment.start === 'undefined' || previousSegment.end !== firstVideoFrameTimeForData + currentVideoTimestampOffset) {
+ return firstVideoFrameTimeForData;
+ }
+ return videoTimingInfo.start;
+ }
+ waitForAppendsToComplete_(segmentInfo) {
+ const trackInfo = this.getCurrentMediaInfo_(segmentInfo);
+ if (!trackInfo) {
+ this.error({
+ message: 'No starting media returned, likely due to an unsupported media format.',
+ playlistExclusionDuration: Infinity,
+ metadata: {
+ errorType: videojs.Error.SegmentUnsupportedMediaFormat
+ }
+ });
+ this.trigger('error');
+ return;
+ } // Although transmuxing is done, appends may not yet be finished. Throw a marker
+ // on each queue this loader is responsible for to ensure that the appends are
+ // complete.
+
+ const {
+ hasAudio,
+ hasVideo,
+ isMuxed
+ } = trackInfo;
+ const waitForVideo = this.loaderType_ === 'main' && hasVideo;
+ const waitForAudio = !this.audioDisabled_ && hasAudio && !isMuxed;
+ segmentInfo.waitingOnAppends = 0; // segments with no data
+
+ if (!segmentInfo.hasAppendedData_) {
+ if (!segmentInfo.timingInfo && typeof segmentInfo.timestampOffset === 'number') {
+ // When there's no audio or video data in the segment, there's no audio or video
+ // timing information.
+ //
+ // If there's no audio or video timing information, then the timestamp offset
+ // can't be adjusted to the appropriate value for the transmuxer and source
+ // buffers.
+ //
+ // Therefore, the next segment should be used to set the timestamp offset.
+ this.isPendingTimestampOffset_ = true;
+ } // override settings for metadata only segments
+
+ segmentInfo.timingInfo = {
+ start: 0
+ };
+ segmentInfo.waitingOnAppends++;
+ if (!this.isPendingTimestampOffset_) {
+ // update the timestampoffset
+ this.updateSourceBufferTimestampOffset_(segmentInfo); // make sure the metadata queue is processed even though we have
+ // no video/audio data.
+
+ this.processMetadataQueue_();
+ } // append is "done" instantly with no data.
+
+ this.checkAppendsDone_(segmentInfo);
+ return;
+ } // Since source updater could call back synchronously, do the increments first.
+
+ if (waitForVideo) {
+ segmentInfo.waitingOnAppends++;
+ }
+ if (waitForAudio) {
+ segmentInfo.waitingOnAppends++;
+ }
+ if (waitForVideo) {
+ this.sourceUpdater_.videoQueueCallback(this.checkAppendsDone_.bind(this, segmentInfo));
+ }
+ if (waitForAudio) {
+ this.sourceUpdater_.audioQueueCallback(this.checkAppendsDone_.bind(this, segmentInfo));
+ }
+ }
+ checkAppendsDone_(segmentInfo) {
+ if (this.checkForAbort_(segmentInfo.requestId)) {
+ return;
+ }
+ segmentInfo.waitingOnAppends--;
+ if (segmentInfo.waitingOnAppends === 0) {
+ this.handleAppendsDone_();
+ }
+ }
+ checkForIllegalMediaSwitch(trackInfo) {
+ const illegalMediaSwitchError = illegalMediaSwitch(this.loaderType_, this.getCurrentMediaInfo_(), trackInfo);
+ if (illegalMediaSwitchError) {
+ this.error({
+ message: illegalMediaSwitchError,
+ playlistExclusionDuration: Infinity,
+ metadata: {
+ errorType: videojs.Error.SegmentSwitchError
+ }
+ });
+ this.trigger('error');
+ return true;
+ }
+ return false;
+ }
+ updateSourceBufferTimestampOffset_(segmentInfo) {
+ if (segmentInfo.timestampOffset === null ||
+ // we don't yet have the start for whatever media type (video or audio) has
+ // priority, timing-wise, so we must wait
+ typeof segmentInfo.timingInfo.start !== 'number' ||
+ // already updated the timestamp offset for this segment
+ segmentInfo.changedTimestampOffset ||
+ // the alt audio loader should not be responsible for setting the timestamp offset
+ this.loaderType_ !== 'main') {
+ return;
+ }
+ let didChange = false; // Primary timing goes by video, and audio is trimmed in the transmuxer, meaning that
+ // the timing info here comes from video. In the event that the audio is longer than
+ // the video, this will trim the start of the audio.
+ // This also trims any offset from 0 at the beginning of the media
+
+ segmentInfo.timestampOffset -= this.getSegmentStartTimeForTimestampOffsetCalculation_({
+ videoTimingInfo: segmentInfo.segment.videoTimingInfo,
+ audioTimingInfo: segmentInfo.segment.audioTimingInfo,
+ timingInfo: segmentInfo.timingInfo
+ }); // In the event that there are part segment downloads, each will try to update the
+ // timestamp offset. Retaining this bit of state prevents us from updating in the
+ // future (within the same segment), however, there may be a better way to handle it.
+
+ segmentInfo.changedTimestampOffset = true;
+ if (segmentInfo.timestampOffset !== this.sourceUpdater_.videoTimestampOffset()) {
+ this.sourceUpdater_.videoTimestampOffset(segmentInfo.timestampOffset);
+ didChange = true;
+ }
+ if (segmentInfo.timestampOffset !== this.sourceUpdater_.audioTimestampOffset()) {
+ this.sourceUpdater_.audioTimestampOffset(segmentInfo.timestampOffset);
+ didChange = true;
+ }
+ if (didChange) {
+ this.trigger('timestampoffset');
+ }
+ }
+ getSegmentStartTimeForTimestampOffsetCalculation_({
+ videoTimingInfo,
+ audioTimingInfo,
+ timingInfo
+ }) {
+ if (!this.useDtsForTimestampOffset_) {
+ return timingInfo.start;
+ }
+ if (videoTimingInfo && typeof videoTimingInfo.transmuxedDecodeStart === 'number') {
+ return videoTimingInfo.transmuxedDecodeStart;
+ } // handle audio only
+
+ if (audioTimingInfo && typeof audioTimingInfo.transmuxedDecodeStart === 'number') {
+ return audioTimingInfo.transmuxedDecodeStart;
+ } // handle content not transmuxed (e.g., MP4)
+
+ return timingInfo.start;
+ }
+ updateTimingInfoEnd_(segmentInfo) {
+ segmentInfo.timingInfo = segmentInfo.timingInfo || {};
+ const trackInfo = this.getMediaInfo_();
+ const useVideoTimingInfo = this.loaderType_ === 'main' && trackInfo && trackInfo.hasVideo;
+ const prioritizedTimingInfo = useVideoTimingInfo && segmentInfo.videoTimingInfo ? segmentInfo.videoTimingInfo : segmentInfo.audioTimingInfo;
+ if (!prioritizedTimingInfo) {
+ return;
+ }
+ segmentInfo.timingInfo.end = typeof prioritizedTimingInfo.end === 'number' ?
+ // End time may not exist in a case where we aren't parsing the full segment (one
+ // current example is the case of fmp4), so use the rough duration to calculate an
+ // end time.
+ prioritizedTimingInfo.end : prioritizedTimingInfo.start + segmentInfo.duration;
+ }
+ /**
+ * callback to run when appendBuffer is finished. detects if we are
+ * in a good state to do things with the data we got, or if we need
+ * to wait for more
+ *
+ * @private
+ */
+
+ handleAppendsDone_() {
+ // appendsdone can cause an abort
+ if (this.pendingSegment_) {
+ this.trigger('appendsdone');
+ }
+ if (!this.pendingSegment_) {
+ this.state = 'READY'; // TODO should this move into this.checkForAbort to speed up requests post abort in
+ // all appending cases?
+
+ if (!this.paused()) {
+ this.monitorBuffer_();
+ }
+ return;
+ }
+ const segmentInfo = this.pendingSegment_;
+ if (segmentInfo.part && segmentInfo.part.syncInfo) {
+ // low-latency flow
+ segmentInfo.part.syncInfo.markAppended();
+ } else if (segmentInfo.segment.syncInfo) {
+ // normal flow
+ segmentInfo.segment.syncInfo.markAppended();
+ } // Now that the end of the segment has been reached, we can set the end time. It's
+ // best to wait until all appends are done so we're sure that the primary media is
+ // finished (and we have its end time).
+
+ this.updateTimingInfoEnd_(segmentInfo);
+ if (this.shouldSaveSegmentTimingInfo_) {
+ // Timeline mappings should only be saved for the main loader. This is for multiple
+ // reasons:
+ //
+ // 1) Only one mapping is saved per timeline, meaning that if both the audio loader
+ // and the main loader try to save the timeline mapping, whichever comes later
+ // will overwrite the first. In theory this is OK, as the mappings should be the
+ // same, however, it breaks for (2)
+ // 2) In the event of a live stream, the initial live point will make for a somewhat
+ // arbitrary mapping. If audio and video streams are not perfectly in-sync, then
+ // the mapping will be off for one of the streams, dependent on which one was
+ // first saved (see (1)).
+ // 3) Primary timing goes by video in VHS, so the mapping should be video.
+ //
+ // Since the audio loader will wait for the main loader to load the first segment,
+ // the main loader will save the first timeline mapping, and ensure that there won't
+ // be a case where audio loads two segments without saving a mapping (thus leading
+ // to missing segment timing info).
+ this.syncController_.saveSegmentTimingInfo({
+ segmentInfo,
+ shouldSaveTimelineMapping: this.loaderType_ === 'main'
+ });
+ }
+ const segmentDurationMessage = getTroublesomeSegmentDurationMessage(segmentInfo, this.sourceType_);
+ if (segmentDurationMessage) {
+ if (segmentDurationMessage.severity === 'warn') {
+ videojs.log.warn(segmentDurationMessage.message);
+ } else {
+ this.logger_(segmentDurationMessage.message);
+ }
+ }
+ this.recordThroughput_(segmentInfo);
+ this.pendingSegment_ = null;
+ this.state = 'READY';
+ if (segmentInfo.isSyncRequest) {
+ this.trigger('syncinfoupdate'); // if the sync request was not appended
+ // then it was not the correct segment.
+ // throw it away and use the data it gave us
+ // to get the correct one.
+
+ if (!segmentInfo.hasAppendedData_) {
+ this.logger_(`Throwing away un-appended sync request ${segmentInfoString(segmentInfo)}`);
+ return;
+ }
+ }
+ this.logger_(`Appended ${segmentInfoString(segmentInfo)}`);
+ this.addSegmentMetadataCue_(segmentInfo);
+ this.fetchAtBuffer_ = true;
+ if (this.currentTimeline_ !== segmentInfo.timeline) {
+ this.timelineChangeController_.lastTimelineChange({
+ type: this.loaderType_,
+ from: this.currentTimeline_,
+ to: segmentInfo.timeline
+ }); // If audio is not disabled, the main segment loader is responsible for updating
+ // the audio timeline as well. If the content is video only, this won't have any
+ // impact.
+
+ if (this.loaderType_ === 'main' && !this.audioDisabled_) {
+ this.timelineChangeController_.lastTimelineChange({
+ type: 'audio',
+ from: this.currentTimeline_,
+ to: segmentInfo.timeline
+ });
+ }
+ }
+ this.currentTimeline_ = segmentInfo.timeline; // We must update the syncinfo to recalculate the seekable range before
+ // the following conditional otherwise it may consider this a bad "guess"
+ // and attempt to resync when the post-update seekable window and live
+ // point would mean that this was the perfect segment to fetch
+
+ this.trigger('syncinfoupdate');
+ const segment = segmentInfo.segment;
+ const part = segmentInfo.part;
+ const badSegmentGuess = segment.end && this.currentTime_() - segment.end > segmentInfo.playlist.targetDuration * 3;
+ const badPartGuess = part && part.end && this.currentTime_() - part.end > segmentInfo.playlist.partTargetDuration * 3; // If we previously appended a segment/part that ends more than 3 part/targetDurations before
+ // the currentTime_ that means that our conservative guess was too conservative.
+ // In that case, reset the loader state so that we try to use any information gained
+ // from the previous request to create a new, more accurate, sync-point.
+
+ if (badSegmentGuess || badPartGuess) {
+ this.logger_(`bad ${badSegmentGuess ? 'segment' : 'part'} ${segmentInfoString(segmentInfo)}`);
+ this.resetEverything();
+ return;
+ }
+ const isWalkingForward = this.mediaIndex !== null; // Don't do a rendition switch unless we have enough time to get a sync segment
+ // and conservatively guess
+
+ if (isWalkingForward) {
+ this.trigger('bandwidthupdate');
+ }
+ this.trigger('progress');
+ this.mediaIndex = segmentInfo.mediaIndex;
+ this.partIndex = segmentInfo.partIndex; // any time an update finishes and the last segment is in the
+ // buffer, end the stream. this ensures the "ended" event will
+ // fire if playback reaches that point.
+
+ if (this.isEndOfStream_(segmentInfo.mediaIndex, segmentInfo.playlist, segmentInfo.partIndex)) {
+ this.endOfStream();
+ } // used for testing
+
+ this.trigger('appended');
+ if (segmentInfo.hasAppendedData_) {
+ this.mediaAppends++;
+ }
+ if (!this.paused()) {
+ this.monitorBuffer_();
+ }
+ }
+ /**
+ * Records the current throughput of the decrypt, transmux, and append
+ * portion of the semgment pipeline. `throughput.rate` is a the cumulative
+ * moving average of the throughput. `throughput.count` is the number of
+ * data points in the average.
+ *
+ * @private
+ * @param {Object} segmentInfo the object returned by loadSegment
+ */
+
+ recordThroughput_(segmentInfo) {
+ if (segmentInfo.duration < MIN_SEGMENT_DURATION_TO_SAVE_STATS) {
+ this.logger_(`Ignoring segment's throughput because its duration of ${segmentInfo.duration}` + ` is less than the min to record ${MIN_SEGMENT_DURATION_TO_SAVE_STATS}`);
+ return;
+ }
+ const rate = this.throughput.rate; // Add one to the time to ensure that we don't accidentally attempt to divide
+ // by zero in the case where the throughput is ridiculously high
+
+ const segmentProcessingTime = Date.now() - segmentInfo.endOfAllRequests + 1; // Multiply by 8000 to convert from bytes/millisecond to bits/second
+
+ const segmentProcessingThroughput = Math.floor(segmentInfo.byteLength / segmentProcessingTime * 8 * 1000); // This is just a cumulative moving average calculation:
+ // newAvg = oldAvg + (sample - oldAvg) / (sampleCount + 1)
+
+ this.throughput.rate += (segmentProcessingThroughput - rate) / ++this.throughput.count;
+ }
+ /**
+ * Adds a cue to the segment-metadata track with some metadata information about the
+ * segment
+ *
+ * @private
+ * @param {Object} segmentInfo
+ * the object returned by loadSegment
+ * @method addSegmentMetadataCue_
+ */
+
+ addSegmentMetadataCue_(segmentInfo) {
+ if (!this.segmentMetadataTrack_) {
+ return;
+ }
+ const segment = segmentInfo.segment;
+ const start = segment.start;
+ const end = segment.end; // Do not try adding the cue if the start and end times are invalid.
+
+ if (!finite(start) || !finite(end)) {
+ return;
+ }
+ removeCuesFromTrack(start, end, this.segmentMetadataTrack_);
+ const Cue = window.WebKitDataCue || window.VTTCue;
+ const value = {
+ custom: segment.custom,
+ dateTimeObject: segment.dateTimeObject,
+ dateTimeString: segment.dateTimeString,
+ programDateTime: segment.programDateTime,
+ bandwidth: segmentInfo.playlist.attributes.BANDWIDTH,
+ resolution: segmentInfo.playlist.attributes.RESOLUTION,
+ codecs: segmentInfo.playlist.attributes.CODECS,
+ byteLength: segmentInfo.byteLength,
+ uri: segmentInfo.uri,
+ timeline: segmentInfo.timeline,
+ playlist: segmentInfo.playlist.id,
+ start,
+ end
+ };
+ const data = JSON.stringify(value);
+ const cue = new Cue(start, end, data); // Attach the metadata to the value property of the cue to keep consistency between
+ // the differences of WebKitDataCue in safari and VTTCue in other browsers
+
+ cue.value = value;
+ this.segmentMetadataTrack_.addCue(cue);
+ }
+ }
+ function noop() {}
+ const toTitleCase = function (string) {
+ if (typeof string !== 'string') {
+ return string;
+ }
+ return string.replace(/./, w => w.toUpperCase());
+ };
+
+ /**
+ * @file source-updater.js
+ */
+ const bufferTypes = ['video', 'audio'];
+ const updating = (type, sourceUpdater) => {
+ const sourceBuffer = sourceUpdater[`${type}Buffer`];
+ return sourceBuffer && sourceBuffer.updating || sourceUpdater.queuePending[type];
+ };
+ const nextQueueIndexOfType = (type, queue) => {
+ for (let i = 0; i < queue.length; i++) {
+ const queueEntry = queue[i];
+ if (queueEntry.type === 'mediaSource') {
+ // If the next entry is a media source entry (uses multiple source buffers), block
+ // processing to allow it to go through first.
+ return null;
+ }
+ if (queueEntry.type === type) {
+ return i;
+ }
+ }
+ return null;
+ };
+ const shiftQueue = (type, sourceUpdater) => {
+ if (sourceUpdater.queue.length === 0) {
+ return;
+ }
+ let queueIndex = 0;
+ let queueEntry = sourceUpdater.queue[queueIndex];
+ if (queueEntry.type === 'mediaSource') {
+ if (!sourceUpdater.updating() && sourceUpdater.mediaSource.readyState !== 'closed') {
+ sourceUpdater.queue.shift();
+ queueEntry.action(sourceUpdater);
+ if (queueEntry.doneFn) {
+ queueEntry.doneFn();
+ } // Only specific source buffer actions must wait for async updateend events. Media
+ // Source actions process synchronously. Therefore, both audio and video source
+ // buffers are now clear to process the next queue entries.
+
+ shiftQueue('audio', sourceUpdater);
+ shiftQueue('video', sourceUpdater);
+ } // Media Source actions require both source buffers, so if the media source action
+ // couldn't process yet (because one or both source buffers are busy), block other
+ // queue actions until both are available and the media source action can process.
+
+ return;
+ }
+ if (type === 'mediaSource') {
+ // If the queue was shifted by a media source action (this happens when pushing a
+ // media source action onto the queue), then it wasn't from an updateend event from an
+ // audio or video source buffer, so there's no change from previous state, and no
+ // processing should be done.
+ return;
+ } // Media source queue entries don't need to consider whether the source updater is
+ // started (i.e., source buffers are created) as they don't need the source buffers, but
+ // source buffer queue entries do.
+
+ if (!sourceUpdater.ready() || sourceUpdater.mediaSource.readyState === 'closed' || updating(type, sourceUpdater)) {
+ return;
+ }
+ if (queueEntry.type !== type) {
+ queueIndex = nextQueueIndexOfType(type, sourceUpdater.queue);
+ if (queueIndex === null) {
+ // Either there's no queue entry that uses this source buffer type in the queue, or
+ // there's a media source queue entry before the next entry of this type, in which
+ // case wait for that action to process first.
+ return;
+ }
+ queueEntry = sourceUpdater.queue[queueIndex];
+ }
+ sourceUpdater.queue.splice(queueIndex, 1); // Keep a record that this source buffer type is in use.
+ //
+ // The queue pending operation must be set before the action is performed in the event
+ // that the action results in a synchronous event that is acted upon. For instance, if
+ // an exception is thrown that can be handled, it's possible that new actions will be
+ // appended to an empty queue and immediately executed, but would not have the correct
+ // pending information if this property was set after the action was performed.
+
+ sourceUpdater.queuePending[type] = queueEntry;
+ queueEntry.action(type, sourceUpdater);
+ if (!queueEntry.doneFn) {
+ // synchronous operation, process next entry
+ sourceUpdater.queuePending[type] = null;
+ shiftQueue(type, sourceUpdater);
+ return;
+ }
+ };
+ const cleanupBuffer = (type, sourceUpdater) => {
+ const buffer = sourceUpdater[`${type}Buffer`];
+ const titleType = toTitleCase(type);
+ if (!buffer) {
+ return;
+ }
+ buffer.removeEventListener('updateend', sourceUpdater[`on${titleType}UpdateEnd_`]);
+ buffer.removeEventListener('error', sourceUpdater[`on${titleType}Error_`]);
+ sourceUpdater.codecs[type] = null;
+ sourceUpdater[`${type}Buffer`] = null;
+ };
+ const inSourceBuffers = (mediaSource, sourceBuffer) => mediaSource && sourceBuffer && Array.prototype.indexOf.call(mediaSource.sourceBuffers, sourceBuffer) !== -1;
+ const actions = {
+ appendBuffer: (bytes, segmentInfo, onError) => (type, sourceUpdater) => {
+ const sourceBuffer = sourceUpdater[`${type}Buffer`]; // can't do anything if the media source / source buffer is null
+ // or the media source does not contain this source buffer.
+
+ if (!inSourceBuffers(sourceUpdater.mediaSource, sourceBuffer)) {
+ return;
+ }
+ sourceUpdater.logger_(`Appending segment ${segmentInfo.mediaIndex}'s ${bytes.length} bytes to ${type}Buffer`);
+ try {
+ sourceBuffer.appendBuffer(bytes);
+ } catch (e) {
+ sourceUpdater.logger_(`Error with code ${e.code} ` + (e.code === QUOTA_EXCEEDED_ERR ? '(QUOTA_EXCEEDED_ERR) ' : '') + `when appending segment ${segmentInfo.mediaIndex} to ${type}Buffer`);
+ sourceUpdater.queuePending[type] = null;
+ onError(e);
+ }
+ },
+ remove: (start, end) => (type, sourceUpdater) => {
+ const sourceBuffer = sourceUpdater[`${type}Buffer`]; // can't do anything if the media source / source buffer is null
+ // or the media source does not contain this source buffer.
+
+ if (!inSourceBuffers(sourceUpdater.mediaSource, sourceBuffer)) {
+ return;
+ }
+ sourceUpdater.logger_(`Removing ${start} to ${end} from ${type}Buffer`);
+ try {
+ sourceBuffer.remove(start, end);
+ } catch (e) {
+ sourceUpdater.logger_(`Remove ${start} to ${end} from ${type}Buffer failed`);
+ }
+ },
+ timestampOffset: offset => (type, sourceUpdater) => {
+ const sourceBuffer = sourceUpdater[`${type}Buffer`]; // can't do anything if the media source / source buffer is null
+ // or the media source does not contain this source buffer.
+
+ if (!inSourceBuffers(sourceUpdater.mediaSource, sourceBuffer)) {
+ return;
+ }
+ sourceUpdater.logger_(`Setting ${type}timestampOffset to ${offset}`);
+ sourceBuffer.timestampOffset = offset;
+ },
+ callback: callback => (type, sourceUpdater) => {
+ callback();
+ },
+ endOfStream: error => sourceUpdater => {
+ if (sourceUpdater.mediaSource.readyState !== 'open') {
+ return;
+ }
+ sourceUpdater.logger_(`Calling mediaSource endOfStream(${error || ''})`);
+ try {
+ sourceUpdater.mediaSource.endOfStream(error);
+ } catch (e) {
+ videojs.log.warn('Failed to call media source endOfStream', e);
+ }
+ },
+ duration: duration => sourceUpdater => {
+ sourceUpdater.logger_(`Setting mediaSource duration to ${duration}`);
+ try {
+ sourceUpdater.mediaSource.duration = duration;
+ } catch (e) {
+ videojs.log.warn('Failed to set media source duration', e);
+ }
+ },
+ abort: () => (type, sourceUpdater) => {
+ if (sourceUpdater.mediaSource.readyState !== 'open') {
+ return;
+ }
+ const sourceBuffer = sourceUpdater[`${type}Buffer`]; // can't do anything if the media source / source buffer is null
+ // or the media source does not contain this source buffer.
+
+ if (!inSourceBuffers(sourceUpdater.mediaSource, sourceBuffer)) {
+ return;
+ }
+ sourceUpdater.logger_(`calling abort on ${type}Buffer`);
+ try {
+ sourceBuffer.abort();
+ } catch (e) {
+ videojs.log.warn(`Failed to abort on ${type}Buffer`, e);
+ }
+ },
+ addSourceBuffer: (type, codec) => sourceUpdater => {
+ const titleType = toTitleCase(type);
+ const mime = getMimeForCodec(codec);
+ sourceUpdater.logger_(`Adding ${type}Buffer with codec ${codec} to mediaSource`);
+ const sourceBuffer = sourceUpdater.mediaSource.addSourceBuffer(mime);
+ sourceBuffer.addEventListener('updateend', sourceUpdater[`on${titleType}UpdateEnd_`]);
+ sourceBuffer.addEventListener('error', sourceUpdater[`on${titleType}Error_`]);
+ sourceUpdater.codecs[type] = codec;
+ sourceUpdater[`${type}Buffer`] = sourceBuffer;
+ },
+ removeSourceBuffer: type => sourceUpdater => {
+ const sourceBuffer = sourceUpdater[`${type}Buffer`];
+ cleanupBuffer(type, sourceUpdater); // can't do anything if the media source / source buffer is null
+ // or the media source does not contain this source buffer.
+
+ if (!inSourceBuffers(sourceUpdater.mediaSource, sourceBuffer)) {
+ return;
+ }
+ sourceUpdater.logger_(`Removing ${type}Buffer with codec ${sourceUpdater.codecs[type]} from mediaSource`);
+ try {
+ sourceUpdater.mediaSource.removeSourceBuffer(sourceBuffer);
+ } catch (e) {
+ videojs.log.warn(`Failed to removeSourceBuffer ${type}Buffer`, e);
+ }
+ },
+ changeType: codec => (type, sourceUpdater) => {
+ const sourceBuffer = sourceUpdater[`${type}Buffer`];
+ const mime = getMimeForCodec(codec); // can't do anything if the media source / source buffer is null
+ // or the media source does not contain this source buffer.
+
+ if (!inSourceBuffers(sourceUpdater.mediaSource, sourceBuffer)) {
+ return;
+ } // do not update codec if we don't need to.
+ // Only update if we change the codec base.
+ // For example, going from avc1.640028 to avc1.64001f does not require a changeType call.
+
+ const newCodecBase = codec.substring(0, codec.indexOf('.'));
+ const oldCodec = sourceUpdater.codecs[type];
+ const oldCodecBase = oldCodec.substring(0, oldCodec.indexOf('.'));
+ if (oldCodecBase === newCodecBase) {
+ return;
+ }
+ sourceUpdater.logger_(`changing ${type}Buffer codec from ${sourceUpdater.codecs[type]} to ${codec}`); // check if change to the provided type is supported
+
+ try {
+ sourceBuffer.changeType(mime);
+ sourceUpdater.codecs[type] = codec;
+ } catch (e) {
+ videojs.log.warn(`Failed to changeType on ${type}Buffer`, e);
+ }
+ }
+ };
+ const pushQueue = ({
+ type,
+ sourceUpdater,
+ action,
+ doneFn,
+ name
+ }) => {
+ sourceUpdater.queue.push({
+ type,
+ action,
+ doneFn,
+ name
+ });
+ shiftQueue(type, sourceUpdater);
+ };
+ const onUpdateend = (type, sourceUpdater) => e => {
+ // Although there should, in theory, be a pending action for any updateend receieved,
+ // there are some actions that may trigger updateend events without set definitions in
+ // the w3c spec. For instance, setting the duration on the media source may trigger
+ // updateend events on source buffers. This does not appear to be in the spec. As such,
+ // if we encounter an updateend without a corresponding pending action from our queue
+ // for that source buffer type, process the next action.
+ const bufferedRangesForType = sourceUpdater[`${type}Buffered`]();
+ const descriptiveString = bufferedRangesToString(bufferedRangesForType);
+ sourceUpdater.logger_(`received "updateend" event for ${type} Source Buffer: `, descriptiveString);
+ if (sourceUpdater.queuePending[type]) {
+ const doneFn = sourceUpdater.queuePending[type].doneFn;
+ sourceUpdater.queuePending[type] = null;
+ if (doneFn) {
+ // if there's an error, report it
+ doneFn(sourceUpdater[`${type}Error_`]);
+ }
+ }
+ shiftQueue(type, sourceUpdater);
+ };
+ /**
+ * A queue of callbacks to be serialized and applied when a
+ * MediaSource and its associated SourceBuffers are not in the
+ * updating state. It is used by the segment loader to update the
+ * underlying SourceBuffers when new data is loaded, for instance.
+ *
+ * @class SourceUpdater
+ * @param {MediaSource} mediaSource the MediaSource to create the SourceBuffer from
+ * @param {string} mimeType the desired MIME type of the underlying SourceBuffer
+ */
+
+ class SourceUpdater extends videojs.EventTarget {
+ constructor(mediaSource) {
+ super();
+ this.mediaSource = mediaSource;
+ this.sourceopenListener_ = () => shiftQueue('mediaSource', this);
+ this.mediaSource.addEventListener('sourceopen', this.sourceopenListener_);
+ this.logger_ = logger('SourceUpdater'); // initial timestamp offset is 0
+
+ this.audioTimestampOffset_ = 0;
+ this.videoTimestampOffset_ = 0;
+ this.queue = [];
+ this.queuePending = {
+ audio: null,
+ video: null
+ };
+ this.delayedAudioAppendQueue_ = [];
+ this.videoAppendQueued_ = false;
+ this.codecs = {};
+ this.onVideoUpdateEnd_ = onUpdateend('video', this);
+ this.onAudioUpdateEnd_ = onUpdateend('audio', this);
+ this.onVideoError_ = e => {
+ // used for debugging
+ this.videoError_ = e;
+ };
+ this.onAudioError_ = e => {
+ // used for debugging
+ this.audioError_ = e;
+ };
+ this.createdSourceBuffers_ = false;
+ this.initializedEme_ = false;
+ this.triggeredReady_ = false;
+ }
+ initializedEme() {
+ this.initializedEme_ = true;
+ this.triggerReady();
+ }
+ hasCreatedSourceBuffers() {
+ // if false, likely waiting on one of the segment loaders to get enough data to create
+ // source buffers
+ return this.createdSourceBuffers_;
+ }
+ hasInitializedAnyEme() {
+ return this.initializedEme_;
+ }
+ ready() {
+ return this.hasCreatedSourceBuffers() && this.hasInitializedAnyEme();
+ }
+ createSourceBuffers(codecs) {
+ if (this.hasCreatedSourceBuffers()) {
+ // already created them before
+ return;
+ } // the intial addOrChangeSourceBuffers will always be
+ // two add buffers.
+
+ this.addOrChangeSourceBuffers(codecs);
+ this.createdSourceBuffers_ = true;
+ this.trigger('createdsourcebuffers');
+ this.triggerReady();
+ }
+ triggerReady() {
+ // only allow ready to be triggered once, this prevents the case
+ // where:
+ // 1. we trigger createdsourcebuffers
+ // 2. ie 11 synchronously initializates eme
+ // 3. the synchronous initialization causes us to trigger ready
+ // 4. We go back to the ready check in createSourceBuffers and ready is triggered again.
+ if (this.ready() && !this.triggeredReady_) {
+ this.triggeredReady_ = true;
+ this.trigger('ready');
+ }
+ }
+ /**
+ * Add a type of source buffer to the media source.
+ *
+ * @param {string} type
+ * The type of source buffer to add.
+ *
+ * @param {string} codec
+ * The codec to add the source buffer with.
+ */
+
+ addSourceBuffer(type, codec) {
+ pushQueue({
+ type: 'mediaSource',
+ sourceUpdater: this,
+ action: actions.addSourceBuffer(type, codec),
+ name: 'addSourceBuffer'
+ });
+ }
+ /**
+ * call abort on a source buffer.
+ *
+ * @param {string} type
+ * The type of source buffer to call abort on.
+ */
+
+ abort(type) {
+ pushQueue({
+ type,
+ sourceUpdater: this,
+ action: actions.abort(type),
+ name: 'abort'
+ });
+ }
+ /**
+ * Call removeSourceBuffer and remove a specific type
+ * of source buffer on the mediaSource.
+ *
+ * @param {string} type
+ * The type of source buffer to remove.
+ */
+
+ removeSourceBuffer(type) {
+ if (!this.canRemoveSourceBuffer()) {
+ videojs.log.error('removeSourceBuffer is not supported!');
+ return;
+ }
+ pushQueue({
+ type: 'mediaSource',
+ sourceUpdater: this,
+ action: actions.removeSourceBuffer(type),
+ name: 'removeSourceBuffer'
+ });
+ }
+ /**
+ * Whether or not the removeSourceBuffer function is supported
+ * on the mediaSource.
+ *
+ * @return {boolean}
+ * if removeSourceBuffer can be called.
+ */
+
+ canRemoveSourceBuffer() {
+ // As of Firefox 83 removeSourceBuffer
+ // throws errors, so we report that it does not support this.
+ return !videojs.browser.IS_FIREFOX && window.MediaSource && window.MediaSource.prototype && typeof window.MediaSource.prototype.removeSourceBuffer === 'function';
+ }
+ /**
+ * Whether or not the changeType function is supported
+ * on our SourceBuffers.
+ *
+ * @return {boolean}
+ * if changeType can be called.
+ */
+
+ static canChangeType() {
+ return window.SourceBuffer && window.SourceBuffer.prototype && typeof window.SourceBuffer.prototype.changeType === 'function';
+ }
+ /**
+ * Whether or not the changeType function is supported
+ * on our SourceBuffers.
+ *
+ * @return {boolean}
+ * if changeType can be called.
+ */
+
+ canChangeType() {
+ return this.constructor.canChangeType();
+ }
+ /**
+ * Call the changeType function on a source buffer, given the code and type.
+ *
+ * @param {string} type
+ * The type of source buffer to call changeType on.
+ *
+ * @param {string} codec
+ * The codec string to change type with on the source buffer.
+ */
+
+ changeType(type, codec) {
+ if (!this.canChangeType()) {
+ videojs.log.error('changeType is not supported!');
+ return;
+ }
+ pushQueue({
+ type,
+ sourceUpdater: this,
+ action: actions.changeType(codec),
+ name: 'changeType'
+ });
+ }
+ /**
+ * Add source buffers with a codec or, if they are already created,
+ * call changeType on source buffers using changeType.
+ *
+ * @param {Object} codecs
+ * Codecs to switch to
+ */
+
+ addOrChangeSourceBuffers(codecs) {
+ if (!codecs || typeof codecs !== 'object' || Object.keys(codecs).length === 0) {
+ throw new Error('Cannot addOrChangeSourceBuffers to undefined codecs');
+ }
+ Object.keys(codecs).forEach(type => {
+ const codec = codecs[type];
+ if (!this.hasCreatedSourceBuffers()) {
+ return this.addSourceBuffer(type, codec);
+ }
+ if (this.canChangeType()) {
+ this.changeType(type, codec);
+ }
+ });
+ }
+ /**
+ * Queue an update to append an ArrayBuffer.
+ *
+ * @param {MediaObject} object containing audioBytes and/or videoBytes
+ * @param {Function} done the function to call when done
+ * @see http://www.w3.org/TR/media-source/#widl-SourceBuffer-appendBuffer-void-ArrayBuffer-data
+ */
+
+ appendBuffer(options, doneFn) {
+ const {
+ segmentInfo,
+ type,
+ bytes
+ } = options;
+ this.processedAppend_ = true;
+ if (type === 'audio' && this.videoBuffer && !this.videoAppendQueued_) {
+ this.delayedAudioAppendQueue_.push([options, doneFn]);
+ this.logger_(`delayed audio append of ${bytes.length} until video append`);
+ return;
+ } // In the case of certain errors, for instance, QUOTA_EXCEEDED_ERR, updateend will
+ // not be fired. This means that the queue will be blocked until the next action
+ // taken by the segment-loader. Provide a mechanism for segment-loader to handle
+ // these errors by calling the doneFn with the specific error.
+
+ const onError = doneFn;
+ pushQueue({
+ type,
+ sourceUpdater: this,
+ action: actions.appendBuffer(bytes, segmentInfo || {
+ mediaIndex: -1
+ }, onError),
+ doneFn,
+ name: 'appendBuffer'
+ });
+ if (type === 'video') {
+ this.videoAppendQueued_ = true;
+ if (!this.delayedAudioAppendQueue_.length) {
+ return;
+ }
+ const queue = this.delayedAudioAppendQueue_.slice();
+ this.logger_(`queuing delayed audio ${queue.length} appendBuffers`);
+ this.delayedAudioAppendQueue_.length = 0;
+ queue.forEach(que => {
+ this.appendBuffer.apply(this, que);
+ });
+ }
+ }
+ /**
+ * Get the audio buffer's buffered timerange.
+ *
+ * @return {TimeRange}
+ * The audio buffer's buffered time range
+ */
+
+ audioBuffered() {
+ // no media source/source buffer or it isn't in the media sources
+ // source buffer list
+ if (!inSourceBuffers(this.mediaSource, this.audioBuffer)) {
+ return createTimeRanges();
+ }
+ return this.audioBuffer.buffered ? this.audioBuffer.buffered : createTimeRanges();
+ }
+ /**
+ * Get the video buffer's buffered timerange.
+ *
+ * @return {TimeRange}
+ * The video buffer's buffered time range
+ */
+
+ videoBuffered() {
+ // no media source/source buffer or it isn't in the media sources
+ // source buffer list
+ if (!inSourceBuffers(this.mediaSource, this.videoBuffer)) {
+ return createTimeRanges();
+ }
+ return this.videoBuffer.buffered ? this.videoBuffer.buffered : createTimeRanges();
+ }
+ /**
+ * Get a combined video/audio buffer's buffered timerange.
+ *
+ * @return {TimeRange}
+ * the combined time range
+ */
+
+ buffered() {
+ const video = inSourceBuffers(this.mediaSource, this.videoBuffer) ? this.videoBuffer : null;
+ const audio = inSourceBuffers(this.mediaSource, this.audioBuffer) ? this.audioBuffer : null;
+ if (audio && !video) {
+ return this.audioBuffered();
+ }
+ if (video && !audio) {
+ return this.videoBuffered();
+ }
+ return bufferIntersection(this.audioBuffered(), this.videoBuffered());
+ }
+ /**
+ * Add a callback to the queue that will set duration on the mediaSource.
+ *
+ * @param {number} duration
+ * The duration to set
+ *
+ * @param {Function} [doneFn]
+ * function to run after duration has been set.
+ */
+
+ setDuration(duration, doneFn = noop) {
+ // In order to set the duration on the media source, it's necessary to wait for all
+ // source buffers to no longer be updating. "If the updating attribute equals true on
+ // any SourceBuffer in sourceBuffers, then throw an InvalidStateError exception and
+ // abort these steps." (source: https://www.w3.org/TR/media-source/#attributes).
+ pushQueue({
+ type: 'mediaSource',
+ sourceUpdater: this,
+ action: actions.duration(duration),
+ name: 'duration',
+ doneFn
+ });
+ }
+ /**
+ * Add a mediaSource endOfStream call to the queue
+ *
+ * @param {Error} [error]
+ * Call endOfStream with an error
+ *
+ * @param {Function} [doneFn]
+ * A function that should be called when the
+ * endOfStream call has finished.
+ */
+
+ endOfStream(error = null, doneFn = noop) {
+ if (typeof error !== 'string') {
+ error = undefined;
+ } // In order to set the duration on the media source, it's necessary to wait for all
+ // source buffers to no longer be updating. "If the updating attribute equals true on
+ // any SourceBuffer in sourceBuffers, then throw an InvalidStateError exception and
+ // abort these steps." (source: https://www.w3.org/TR/media-source/#attributes).
+
+ pushQueue({
+ type: 'mediaSource',
+ sourceUpdater: this,
+ action: actions.endOfStream(error),
+ name: 'endOfStream',
+ doneFn
+ });
+ }
+ /**
+ * Queue an update to remove a time range from the buffer.
+ *
+ * @param {number} start where to start the removal
+ * @param {number} end where to end the removal
+ * @param {Function} [done=noop] optional callback to be executed when the remove
+ * operation is complete
+ * @see http://www.w3.org/TR/media-source/#widl-SourceBuffer-remove-void-double-start-unrestricted-double-end
+ */
+
+ removeAudio(start, end, done = noop) {
+ if (!this.audioBuffered().length || this.audioBuffered().end(0) === 0) {
+ done();
+ return;
+ }
+ pushQueue({
+ type: 'audio',
+ sourceUpdater: this,
+ action: actions.remove(start, end),
+ doneFn: done,
+ name: 'remove'
+ });
+ }
+ /**
+ * Queue an update to remove a time range from the buffer.
+ *
+ * @param {number} start where to start the removal
+ * @param {number} end where to end the removal
+ * @param {Function} [done=noop] optional callback to be executed when the remove
+ * operation is complete
+ * @see http://www.w3.org/TR/media-source/#widl-SourceBuffer-remove-void-double-start-unrestricted-double-end
+ */
+
+ removeVideo(start, end, done = noop) {
+ if (!this.videoBuffered().length || this.videoBuffered().end(0) === 0) {
+ done();
+ return;
+ }
+ pushQueue({
+ type: 'video',
+ sourceUpdater: this,
+ action: actions.remove(start, end),
+ doneFn: done,
+ name: 'remove'
+ });
+ }
+ /**
+ * Whether the underlying sourceBuffer is updating or not
+ *
+ * @return {boolean} the updating status of the SourceBuffer
+ */
+
+ updating() {
+ // the audio/video source buffer is updating
+ if (updating('audio', this) || updating('video', this)) {
+ return true;
+ }
+ return false;
+ }
+ /**
+ * Set/get the timestampoffset on the audio SourceBuffer
+ *
+ * @return {number} the timestamp offset
+ */
+
+ audioTimestampOffset(offset) {
+ if (typeof offset !== 'undefined' && this.audioBuffer &&
+ // no point in updating if it's the same
+ this.audioTimestampOffset_ !== offset) {
+ pushQueue({
+ type: 'audio',
+ sourceUpdater: this,
+ action: actions.timestampOffset(offset),
+ name: 'timestampOffset'
+ });
+ this.audioTimestampOffset_ = offset;
+ }
+ return this.audioTimestampOffset_;
+ }
+ /**
+ * Set/get the timestampoffset on the video SourceBuffer
+ *
+ * @return {number} the timestamp offset
+ */
+
+ videoTimestampOffset(offset) {
+ if (typeof offset !== 'undefined' && this.videoBuffer &&
+ // no point in updating if it's the same
+ this.videoTimestampOffset !== offset) {
+ pushQueue({
+ type: 'video',
+ sourceUpdater: this,
+ action: actions.timestampOffset(offset),
+ name: 'timestampOffset'
+ });
+ this.videoTimestampOffset_ = offset;
+ }
+ return this.videoTimestampOffset_;
+ }
+ /**
+ * Add a function to the queue that will be called
+ * when it is its turn to run in the audio queue.
+ *
+ * @param {Function} callback
+ * The callback to queue.
+ */
+
+ audioQueueCallback(callback) {
+ if (!this.audioBuffer) {
+ return;
+ }
+ pushQueue({
+ type: 'audio',
+ sourceUpdater: this,
+ action: actions.callback(callback),
+ name: 'callback'
+ });
+ }
+ /**
+ * Add a function to the queue that will be called
+ * when it is its turn to run in the video queue.
+ *
+ * @param {Function} callback
+ * The callback to queue.
+ */
+
+ videoQueueCallback(callback) {
+ if (!this.videoBuffer) {
+ return;
+ }
+ pushQueue({
+ type: 'video',
+ sourceUpdater: this,
+ action: actions.callback(callback),
+ name: 'callback'
+ });
+ }
+ /**
+ * dispose of the source updater and the underlying sourceBuffer
+ */
+
+ dispose() {
+ this.trigger('dispose');
+ bufferTypes.forEach(type => {
+ this.abort(type);
+ if (this.canRemoveSourceBuffer()) {
+ this.removeSourceBuffer(type);
+ } else {
+ this[`${type}QueueCallback`](() => cleanupBuffer(type, this));
+ }
+ });
+ this.videoAppendQueued_ = false;
+ this.delayedAudioAppendQueue_.length = 0;
+ if (this.sourceopenListener_) {
+ this.mediaSource.removeEventListener('sourceopen', this.sourceopenListener_);
+ }
+ this.off();
+ }
+ }
+ const uint8ToUtf8 = uintArray => decodeURIComponent(escape(String.fromCharCode.apply(null, uintArray)));
+ const bufferToHexString = buffer => {
+ const uInt8Buffer = new Uint8Array(buffer);
+ return Array.from(uInt8Buffer).map(byte => byte.toString(16).padStart(2, '0')).join('');
+ };
+
+ /**
+ * @file vtt-segment-loader.js
+ */
+ const VTT_LINE_TERMINATORS = new Uint8Array('\n\n'.split('').map(char => char.charCodeAt(0)));
+ class NoVttJsError extends Error {
+ constructor() {
+ super('Trying to parse received VTT cues, but there is no WebVTT. Make sure vtt.js is loaded.');
+ }
+ }
+ /**
+ * An object that manages segment loading and appending.
+ *
+ * @class VTTSegmentLoader
+ * @param {Object} options required and optional options
+ * @extends videojs.EventTarget
+ */
+
+ class VTTSegmentLoader extends SegmentLoader {
+ constructor(settings, options = {}) {
+ super(settings, options); // SegmentLoader requires a MediaSource be specified or it will throw an error;
+ // however, VTTSegmentLoader has no need of a media source, so delete the reference
+
+ this.mediaSource_ = null;
+ this.subtitlesTrack_ = null;
+ this.featuresNativeTextTracks_ = settings.featuresNativeTextTracks;
+ this.loadVttJs = settings.loadVttJs; // The VTT segment will have its own time mappings. Saving VTT segment timing info in
+ // the sync controller leads to improper behavior.
+
+ this.shouldSaveSegmentTimingInfo_ = false;
+ }
+ createTransmuxer_() {
+ // don't need to transmux any subtitles
+ return null;
+ }
+ /**
+ * Indicates which time ranges are buffered
+ *
+ * @return {TimeRange}
+ * TimeRange object representing the current buffered ranges
+ */
+
+ buffered_() {
+ if (!this.subtitlesTrack_ || !this.subtitlesTrack_.cues || !this.subtitlesTrack_.cues.length) {
+ return createTimeRanges();
+ }
+ const cues = this.subtitlesTrack_.cues;
+ const start = cues[0].startTime;
+ const end = cues[cues.length - 1].startTime;
+ return createTimeRanges([[start, end]]);
+ }
+ /**
+ * Gets and sets init segment for the provided map
+ *
+ * @param {Object} map
+ * The map object representing the init segment to get or set
+ * @param {boolean=} set
+ * If true, the init segment for the provided map should be saved
+ * @return {Object}
+ * map object for desired init segment
+ */
+
+ initSegmentForMap(map, set = false) {
+ if (!map) {
+ return null;
+ }
+ const id = initSegmentId(map);
+ let storedMap = this.initSegments_[id];
+ if (set && !storedMap && map.bytes) {
+ // append WebVTT line terminators to the media initialization segment if it exists
+ // to follow the WebVTT spec (https://w3c.github.io/webvtt/#file-structure) that
+ // requires two or more WebVTT line terminators between the WebVTT header and the
+ // rest of the file
+ const combinedByteLength = VTT_LINE_TERMINATORS.byteLength + map.bytes.byteLength;
+ const combinedSegment = new Uint8Array(combinedByteLength);
+ combinedSegment.set(map.bytes);
+ combinedSegment.set(VTT_LINE_TERMINATORS, map.bytes.byteLength);
+ this.initSegments_[id] = storedMap = {
+ resolvedUri: map.resolvedUri,
+ byterange: map.byterange,
+ bytes: combinedSegment
+ };
+ }
+ return storedMap || map;
+ }
+ /**
+ * Returns true if all configuration required for loading is present, otherwise false.
+ *
+ * @return {boolean} True if the all configuration is ready for loading
+ * @private
+ */
+
+ couldBeginLoading_() {
+ return this.playlist_ && this.subtitlesTrack_ && !this.paused();
+ }
+ /**
+ * Once all the starting parameters have been specified, begin
+ * operation. This method should only be invoked from the INIT
+ * state.
+ *
+ * @private
+ */
+
+ init_() {
+ this.state = 'READY';
+ this.resetEverything();
+ return this.monitorBuffer_();
+ }
+ /**
+ * Set a subtitle track on the segment loader to add subtitles to
+ *
+ * @param {TextTrack=} track
+ * The text track to add loaded subtitles to
+ * @return {TextTrack}
+ * Returns the subtitles track
+ */
+
+ track(track) {
+ if (typeof track === 'undefined') {
+ return this.subtitlesTrack_;
+ }
+ this.subtitlesTrack_ = track; // if we were unpaused but waiting for a sourceUpdater, start
+ // buffering now
+
+ if (this.state === 'INIT' && this.couldBeginLoading_()) {
+ this.init_();
+ }
+ return this.subtitlesTrack_;
+ }
+ /**
+ * Remove any data in the source buffer between start and end times
+ *
+ * @param {number} start - the start time of the region to remove from the buffer
+ * @param {number} end - the end time of the region to remove from the buffer
+ */
+
+ remove(start, end) {
+ removeCuesFromTrack(start, end, this.subtitlesTrack_);
+ }
+ /**
+ * fill the buffer with segements unless the sourceBuffers are
+ * currently updating
+ *
+ * Note: this function should only ever be called by monitorBuffer_
+ * and never directly
+ *
+ * @private
+ */
+
+ fillBuffer_() {
+ // see if we need to begin loading immediately
+ const segmentInfo = this.chooseNextRequest_();
+ if (!segmentInfo) {
+ return;
+ }
+ if (this.syncController_.timestampOffsetForTimeline(segmentInfo.timeline) === null) {
+ // We don't have the timestamp offset that we need to sync subtitles.
+ // Rerun on a timestamp offset or user interaction.
+ const checkTimestampOffset = () => {
+ this.state = 'READY';
+ if (!this.paused()) {
+ // if not paused, queue a buffer check as soon as possible
+ this.monitorBuffer_();
+ }
+ };
+ this.syncController_.one('timestampoffset', checkTimestampOffset);
+ this.state = 'WAITING_ON_TIMELINE';
+ return;
+ }
+ this.loadSegment_(segmentInfo);
+ } // never set a timestamp offset for vtt segments.
+
+ timestampOffsetForSegment_() {
+ return null;
+ }
+ chooseNextRequest_() {
+ return this.skipEmptySegments_(super.chooseNextRequest_());
+ }
+ /**
+ * Prevents the segment loader from requesting segments we know contain no subtitles
+ * by walking forward until we find the next segment that we don't know whether it is
+ * empty or not.
+ *
+ * @param {Object} segmentInfo
+ * a segment info object that describes the current segment
+ * @return {Object}
+ * a segment info object that describes the current segment
+ */
+
+ skipEmptySegments_(segmentInfo) {
+ while (segmentInfo && segmentInfo.segment.empty) {
+ // stop at the last possible segmentInfo
+ if (segmentInfo.mediaIndex + 1 >= segmentInfo.playlist.segments.length) {
+ segmentInfo = null;
+ break;
+ }
+ segmentInfo = this.generateSegmentInfo_({
+ playlist: segmentInfo.playlist,
+ mediaIndex: segmentInfo.mediaIndex + 1,
+ startOfSegment: segmentInfo.startOfSegment + segmentInfo.duration,
+ isSyncRequest: segmentInfo.isSyncRequest
+ });
+ }
+ return segmentInfo;
+ }
+ stopForError(error) {
+ this.error(error);
+ this.state = 'READY';
+ this.pause();
+ this.trigger('error');
+ }
+ /**
+ * append a decrypted segement to the SourceBuffer through a SourceUpdater
+ *
+ * @private
+ */
+
+ segmentRequestFinished_(error, simpleSegment, result) {
+ if (!this.subtitlesTrack_) {
+ this.state = 'READY';
+ return;
+ }
+ this.saveTransferStats_(simpleSegment.stats); // the request was aborted
+
+ if (!this.pendingSegment_) {
+ this.state = 'READY';
+ this.mediaRequestsAborted += 1;
+ return;
+ }
+ if (error) {
+ if (error.code === REQUEST_ERRORS.TIMEOUT) {
+ this.handleTimeout_();
+ }
+ if (error.code === REQUEST_ERRORS.ABORTED) {
+ this.mediaRequestsAborted += 1;
+ } else {
+ this.mediaRequestsErrored += 1;
+ }
+ this.stopForError(error);
+ return;
+ }
+ const segmentInfo = this.pendingSegment_; // although the VTT segment loader bandwidth isn't really used, it's good to
+ // maintain functionality between segment loaders
+
+ this.saveBandwidthRelatedStats_(segmentInfo.duration, simpleSegment.stats); // if this request included a segment key, save that data in the cache
+
+ if (simpleSegment.key) {
+ this.segmentKey(simpleSegment.key, true);
+ }
+ this.state = 'APPENDING'; // used for tests
+
+ this.trigger('appending');
+ const segment = segmentInfo.segment;
+ if (segment.map) {
+ segment.map.bytes = simpleSegment.map.bytes;
+ }
+ segmentInfo.bytes = simpleSegment.bytes; // Make sure that vttjs has loaded, otherwise, load it and wait till it finished loading
+
+ if (typeof window.WebVTT !== 'function' && typeof this.loadVttJs === 'function') {
+ this.state = 'WAITING_ON_VTTJS'; // should be fine to call multiple times
+ // script will be loaded once but multiple listeners will be added to the queue, which is expected.
+
+ this.loadVttJs().then(() => this.segmentRequestFinished_(error, simpleSegment, result), () => this.stopForError({
+ message: 'Error loading vtt.js',
+ metadata: {
+ errorType: videojs.Error.VttLoadError
+ }
+ }));
+ return;
+ }
+ segment.requested = true;
+ try {
+ this.parseVTTCues_(segmentInfo);
+ } catch (e) {
+ this.stopForError({
+ message: e.message,
+ metadata: {
+ errorType: videojs.Error.VttCueParsingError
+ }
+ });
+ return;
+ }
+ this.updateTimeMapping_(segmentInfo, this.syncController_.timelines[segmentInfo.timeline], this.playlist_);
+ if (segmentInfo.cues.length) {
+ segmentInfo.timingInfo = {
+ start: segmentInfo.cues[0].startTime,
+ end: segmentInfo.cues[segmentInfo.cues.length - 1].endTime
+ };
+ } else {
+ segmentInfo.timingInfo = {
+ start: segmentInfo.startOfSegment,
+ end: segmentInfo.startOfSegment + segmentInfo.duration
+ };
+ }
+ if (segmentInfo.isSyncRequest) {
+ this.trigger('syncinfoupdate');
+ this.pendingSegment_ = null;
+ this.state = 'READY';
+ return;
+ }
+ segmentInfo.byteLength = segmentInfo.bytes.byteLength;
+ this.mediaSecondsLoaded += segment.duration; // Create VTTCue instances for each cue in the new segment and add them to
+ // the subtitle track
+
+ segmentInfo.cues.forEach(cue => {
+ this.subtitlesTrack_.addCue(this.featuresNativeTextTracks_ ? new window.VTTCue(cue.startTime, cue.endTime, cue.text) : cue);
+ }); // Remove any duplicate cues from the subtitle track. The WebVTT spec allows
+ // cues to have identical time-intervals, but if the text is also identical
+ // we can safely assume it is a duplicate that can be removed (ex. when a cue
+ // "overlaps" VTT segments)
+
+ removeDuplicateCuesFromTrack(this.subtitlesTrack_);
+ this.handleAppendsDone_();
+ }
+ handleData_() {// noop as we shouldn't be getting video/audio data captions
+ // that we do not support here.
+ }
+ updateTimingInfoEnd_() {// noop
+ }
+ /**
+ * Uses the WebVTT parser to parse the segment response
+ *
+ * @throws NoVttJsError
+ *
+ * @param {Object} segmentInfo
+ * a segment info object that describes the current segment
+ * @private
+ */
+
+ parseVTTCues_(segmentInfo) {
+ let decoder;
+ let decodeBytesToString = false;
+ if (typeof window.WebVTT !== 'function') {
+ // caller is responsible for exception handling.
+ throw new NoVttJsError();
+ }
+ if (typeof window.TextDecoder === 'function') {
+ decoder = new window.TextDecoder('utf8');
+ } else {
+ decoder = window.WebVTT.StringDecoder();
+ decodeBytesToString = true;
+ }
+ const parser = new window.WebVTT.Parser(window, window.vttjs, decoder);
+ segmentInfo.cues = [];
+ segmentInfo.timestampmap = {
+ MPEGTS: 0,
+ LOCAL: 0
+ };
+ parser.oncue = segmentInfo.cues.push.bind(segmentInfo.cues);
+ parser.ontimestampmap = map => {
+ segmentInfo.timestampmap = map;
+ };
+ parser.onparsingerror = error => {
+ videojs.log.warn('Error encountered when parsing cues: ' + error.message);
+ };
+ if (segmentInfo.segment.map) {
+ let mapData = segmentInfo.segment.map.bytes;
+ if (decodeBytesToString) {
+ mapData = uint8ToUtf8(mapData);
+ }
+ parser.parse(mapData);
+ }
+ let segmentData = segmentInfo.bytes;
+ if (decodeBytesToString) {
+ segmentData = uint8ToUtf8(segmentData);
+ }
+ parser.parse(segmentData);
+ parser.flush();
+ }
+ /**
+ * Updates the start and end times of any cues parsed by the WebVTT parser using
+ * the information parsed from the X-TIMESTAMP-MAP header and a TS to media time mapping
+ * from the SyncController
+ *
+ * @param {Object} segmentInfo
+ * a segment info object that describes the current segment
+ * @param {Object} mappingObj
+ * object containing a mapping from TS to media time
+ * @param {Object} playlist
+ * the playlist object containing the segment
+ * @private
+ */
+
+ updateTimeMapping_(segmentInfo, mappingObj, playlist) {
+ const segment = segmentInfo.segment;
+ if (!mappingObj) {
+ // If the sync controller does not have a mapping of TS to Media Time for the
+ // timeline, then we don't have enough information to update the cue
+ // start/end times
+ return;
+ }
+ if (!segmentInfo.cues.length) {
+ // If there are no cues, we also do not have enough information to figure out
+ // segment timing. Mark that the segment contains no cues so we don't re-request
+ // an empty segment.
+ segment.empty = true;
+ return;
+ }
+ const {
+ MPEGTS,
+ LOCAL
+ } = segmentInfo.timestampmap;
+ /**
+ * From the spec:
+ * The MPEGTS media timestamp MUST use a 90KHz timescale,
+ * even when non-WebVTT Media Segments use a different timescale.
+ */
+
+ const mpegTsInSeconds = MPEGTS / clock_1;
+ const diff = mpegTsInSeconds - LOCAL + mappingObj.mapping;
+ segmentInfo.cues.forEach(cue => {
+ const duration = cue.endTime - cue.startTime;
+ const startTime = MPEGTS === 0 ? cue.startTime + diff : this.handleRollover_(cue.startTime + diff, mappingObj.time);
+ cue.startTime = Math.max(startTime, 0);
+ cue.endTime = Math.max(startTime + duration, 0);
+ });
+ if (!playlist.syncInfo) {
+ const firstStart = segmentInfo.cues[0].startTime;
+ const lastStart = segmentInfo.cues[segmentInfo.cues.length - 1].startTime;
+ playlist.syncInfo = {
+ mediaSequence: playlist.mediaSequence + segmentInfo.mediaIndex,
+ time: Math.min(firstStart, lastStart - segment.duration)
+ };
+ }
+ }
+ /**
+ * MPEG-TS PES timestamps are limited to 2^33.
+ * Once they reach 2^33, they roll over to 0.
+ * mux.js handles PES timestamp rollover for the following scenarios:
+ * [forward rollover(right)] ->
+ * PES timestamps monotonically increase, and once they reach 2^33, they roll over to 0
+ * [backward rollover(left)] -->
+ * we seek back to position before rollover.
+ *
+ * According to the HLS SPEC:
+ * When synchronizing WebVTT with PES timestamps, clients SHOULD account
+ * for cases where the 33-bit PES timestamps have wrapped and the WebVTT
+ * cue times have not. When the PES timestamp wraps, the WebVTT Segment
+ * SHOULD have a X-TIMESTAMP-MAP header that maps the current WebVTT
+ * time to the new (low valued) PES timestamp.
+ *
+ * So we want to handle rollover here and align VTT Cue start/end time to the player's time.
+ */
+
+ handleRollover_(value, reference) {
+ if (reference === null) {
+ return value;
+ }
+ let valueIn90khz = value * clock_1;
+ const referenceIn90khz = reference * clock_1;
+ let offset;
+ if (referenceIn90khz < valueIn90khz) {
+ // - 2^33
+ offset = -8589934592;
+ } else {
+ // + 2^33
+ offset = 8589934592;
+ } // distance(value - reference) > 2^32
+
+ while (Math.abs(valueIn90khz - referenceIn90khz) > 4294967296) {
+ valueIn90khz += offset;
+ }
+ return valueIn90khz / clock_1;
+ }
+ }
+
+ /**
+ * @file ad-cue-tags.js
+ */
+ /**
+ * Searches for an ad cue that overlaps with the given mediaTime
+ *
+ * @param {Object} track
+ * the track to find the cue for
+ *
+ * @param {number} mediaTime
+ * the time to find the cue at
+ *
+ * @return {Object|null}
+ * the found cue or null
+ */
+
+ const findAdCue = function (track, mediaTime) {
+ const cues = track.cues;
+ for (let i = 0; i < cues.length; i++) {
+ const cue = cues[i];
+ if (mediaTime >= cue.adStartTime && mediaTime <= cue.adEndTime) {
+ return cue;
+ }
+ }
+ return null;
+ };
+ const updateAdCues = function (media, track, offset = 0) {
+ if (!media.segments) {
+ return;
+ }
+ let mediaTime = offset;
+ let cue;
+ for (let i = 0; i < media.segments.length; i++) {
+ const segment = media.segments[i];
+ if (!cue) {
+ // Since the cues will span for at least the segment duration, adding a fudge
+ // factor of half segment duration will prevent duplicate cues from being
+ // created when timing info is not exact (e.g. cue start time initialized
+ // at 10.006677, but next call mediaTime is 10.003332 )
+ cue = findAdCue(track, mediaTime + segment.duration / 2);
+ }
+ if (cue) {
+ if ('cueIn' in segment) {
+ // Found a CUE-IN so end the cue
+ cue.endTime = mediaTime;
+ cue.adEndTime = mediaTime;
+ mediaTime += segment.duration;
+ cue = null;
+ continue;
+ }
+ if (mediaTime < cue.endTime) {
+ // Already processed this mediaTime for this cue
+ mediaTime += segment.duration;
+ continue;
+ } // otherwise extend cue until a CUE-IN is found
+
+ cue.endTime += segment.duration;
+ } else {
+ if ('cueOut' in segment) {
+ cue = new window.VTTCue(mediaTime, mediaTime + segment.duration, segment.cueOut);
+ cue.adStartTime = mediaTime; // Assumes tag format to be
+ // #EXT-X-CUE-OUT:30
+
+ cue.adEndTime = mediaTime + parseFloat(segment.cueOut);
+ track.addCue(cue);
+ }
+ if ('cueOutCont' in segment) {
+ // Entered into the middle of an ad cue
+ // Assumes tag formate to be
+ // #EXT-X-CUE-OUT-CONT:10/30
+ const [adOffset, adTotal] = segment.cueOutCont.split('/').map(parseFloat);
+ cue = new window.VTTCue(mediaTime, mediaTime + segment.duration, '');
+ cue.adStartTime = mediaTime - adOffset;
+ cue.adEndTime = cue.adStartTime + adTotal;
+ track.addCue(cue);
+ }
+ }
+ mediaTime += segment.duration;
+ }
+ };
+ class SyncInfo {
+ /**
+ * @param {number} start - media sequence start
+ * @param {number} end - media sequence end
+ * @param {number} segmentIndex - index for associated segment
+ * @param {number|null} [partIndex] - index for associated part
+ * @param {boolean} [appended] - appended indicator
+ *
+ */
+ constructor({
+ start,
+ end,
+ segmentIndex,
+ partIndex = null,
+ appended = false
+ }) {
+ this.start_ = start;
+ this.end_ = end;
+ this.segmentIndex_ = segmentIndex;
+ this.partIndex_ = partIndex;
+ this.appended_ = appended;
+ }
+ isInRange(targetTime) {
+ return targetTime >= this.start && targetTime < this.end;
+ }
+ markAppended() {
+ this.appended_ = true;
+ }
+ resetAppendedStatus() {
+ this.appended_ = false;
+ }
+ get isAppended() {
+ return this.appended_;
+ }
+ get start() {
+ return this.start_;
+ }
+ get end() {
+ return this.end_;
+ }
+ get segmentIndex() {
+ return this.segmentIndex_;
+ }
+ get partIndex() {
+ return this.partIndex_;
+ }
+ }
+ class SyncInfoData {
+ /**
+ *
+ * @param {SyncInfo} segmentSyncInfo - sync info for a given segment
+ * @param {Array<SyncInfo>} [partsSyncInfo] - sync infos for a list of parts for a given segment
+ */
+ constructor(segmentSyncInfo, partsSyncInfo = []) {
+ this.segmentSyncInfo_ = segmentSyncInfo;
+ this.partsSyncInfo_ = partsSyncInfo;
+ }
+ get segmentSyncInfo() {
+ return this.segmentSyncInfo_;
+ }
+ get partsSyncInfo() {
+ return this.partsSyncInfo_;
+ }
+ get hasPartsSyncInfo() {
+ return this.partsSyncInfo_.length > 0;
+ }
+ resetAppendStatus() {
+ this.segmentSyncInfo_.resetAppendedStatus();
+ this.partsSyncInfo_.forEach(partSyncInfo => partSyncInfo.resetAppendedStatus());
+ }
+ }
+ class MediaSequenceSync {
+ constructor() {
+ /**
+ * @type {Map<number, SyncInfoData>}
+ * @private
+ */
+ this.storage_ = new Map();
+ this.diagnostics_ = '';
+ this.isReliable_ = false;
+ this.start_ = -Infinity;
+ this.end_ = Infinity;
+ }
+ get start() {
+ return this.start_;
+ }
+ get end() {
+ return this.end_;
+ }
+ get diagnostics() {
+ return this.diagnostics_;
+ }
+ get isReliable() {
+ return this.isReliable_;
+ }
+ resetAppendedStatus() {
+ this.storage_.forEach(syncInfoData => syncInfoData.resetAppendStatus());
+ }
+ /**
+ * update sync storage
+ *
+ * @param {Object} playlist
+ * @param {number} currentTime
+ *
+ * @return {void}
+ */
+
+ update(playlist, currentTime) {
+ const {
+ mediaSequence,
+ segments
+ } = playlist;
+ this.isReliable_ = this.isReliablePlaylist_(mediaSequence, segments);
+ if (!this.isReliable_) {
+ return;
+ }
+ return this.updateStorage_(segments, mediaSequence, this.calculateBaseTime_(mediaSequence, currentTime));
+ }
+ /**
+ * @param {number} targetTime
+ * @return {SyncInfo|null}
+ */
+
+ getSyncInfoForTime(targetTime) {
+ for (const {
+ segmentSyncInfo,
+ partsSyncInfo
+ } of this.storage_.values()) {
+ // Normal segment flow:
+ if (!partsSyncInfo.length) {
+ if (segmentSyncInfo.isInRange(targetTime)) {
+ return segmentSyncInfo;
+ }
+ } else {
+ // Low latency flow:
+ for (const partSyncInfo of partsSyncInfo) {
+ if (partSyncInfo.isInRange(targetTime)) {
+ return partSyncInfo;
+ }
+ }
+ }
+ }
+ return null;
+ }
+ updateStorage_(segments, startingMediaSequence, startingTime) {
+ const newStorage = new Map();
+ let newDiagnostics = '\n';
+ let currentStart = startingTime;
+ let currentMediaSequence = startingMediaSequence;
+ this.start_ = currentStart;
+ segments.forEach((segment, segmentIndex) => {
+ const prevSyncInfoData = this.storage_.get(currentMediaSequence);
+ const segmentStart = currentStart;
+ const segmentEnd = segmentStart + segment.duration;
+ const segmentIsAppended = Boolean(prevSyncInfoData && prevSyncInfoData.segmentSyncInfo && prevSyncInfoData.segmentSyncInfo.isAppended);
+ const segmentSyncInfo = new SyncInfo({
+ start: segmentStart,
+ end: segmentEnd,
+ appended: segmentIsAppended,
+ segmentIndex
+ });
+ segment.syncInfo = segmentSyncInfo;
+ let currentPartStart = currentStart;
+ const partsSyncInfo = (segment.parts || []).map((part, partIndex) => {
+ const partStart = currentPartStart;
+ const partEnd = currentPartStart + part.duration;
+ const partIsAppended = Boolean(prevSyncInfoData && prevSyncInfoData.partsSyncInfo && prevSyncInfoData.partsSyncInfo[partIndex] && prevSyncInfoData.partsSyncInfo[partIndex].isAppended);
+ const partSyncInfo = new SyncInfo({
+ start: partStart,
+ end: partEnd,
+ appended: partIsAppended,
+ segmentIndex,
+ partIndex
+ });
+ currentPartStart = partEnd;
+ newDiagnostics += `Media Sequence: ${currentMediaSequence}.${partIndex} | Range: ${partStart} --> ${partEnd} | Appended: ${partIsAppended}\n`;
+ part.syncInfo = partSyncInfo;
+ return partSyncInfo;
+ });
+ newStorage.set(currentMediaSequence, new SyncInfoData(segmentSyncInfo, partsSyncInfo));
+ newDiagnostics += `${compactSegmentUrlDescription(segment.resolvedUri)} | Media Sequence: ${currentMediaSequence} | Range: ${segmentStart} --> ${segmentEnd} | Appended: ${segmentIsAppended}\n`;
+ currentMediaSequence++;
+ currentStart = segmentEnd;
+ });
+ this.end_ = currentStart;
+ this.storage_ = newStorage;
+ this.diagnostics_ = newDiagnostics;
+ }
+ calculateBaseTime_(mediaSequence, fallback) {
+ if (!this.storage_.size) {
+ // Initial setup flow.
+ return 0;
+ }
+ if (this.storage_.has(mediaSequence)) {
+ // Normal flow.
+ return this.storage_.get(mediaSequence).segmentSyncInfo.start;
+ } // Fallback flow.
+ // There is a gap between last recorded playlist and a new one received.
+
+ return fallback;
+ }
+ isReliablePlaylist_(mediaSequence, segments) {
+ return mediaSequence !== undefined && mediaSequence !== null && Array.isArray(segments) && segments.length;
+ }
+ }
+
+ /**
+ * @file sync-controller.js
+ */
+ // synchronize expired playlist segments.
+ // the max media sequence diff is 48 hours of live stream
+ // content with two second segments. Anything larger than that
+ // will likely be invalid.
+
+ const MAX_MEDIA_SEQUENCE_DIFF_FOR_SYNC = 86400;
+ const syncPointStrategies = [
+ // Stategy "VOD": Handle the VOD-case where the sync-point is *always*
+ // the equivalence display-time 0 === segment-index 0
+ {
+ name: 'VOD',
+ run: (syncController, playlist, duration, currentTimeline, currentTime) => {
+ if (duration !== Infinity) {
+ const syncPoint = {
+ time: 0,
+ segmentIndex: 0,
+ partIndex: null
+ };
+ return syncPoint;
+ }
+ return null;
+ }
+ }, {
+ name: 'MediaSequence',
+ /**
+ * run media sequence strategy
+ *
+ * @param {SyncController} syncController
+ * @param {Object} playlist
+ * @param {number} duration
+ * @param {number} currentTimeline
+ * @param {number} currentTime
+ * @param {string} type
+ */
+ run: (syncController, playlist, duration, currentTimeline, currentTime, type) => {
+ const mediaSequenceSync = syncController.getMediaSequenceSync(type);
+ if (!mediaSequenceSync) {
+ return null;
+ }
+ if (!mediaSequenceSync.isReliable) {
+ return null;
+ }
+ const syncInfo = mediaSequenceSync.getSyncInfoForTime(currentTime);
+ if (!syncInfo) {
+ return null;
+ }
+ return {
+ time: syncInfo.start,
+ partIndex: syncInfo.partIndex,
+ segmentIndex: syncInfo.segmentIndex
+ };
+ }
+ },
+ // Stategy "ProgramDateTime": We have a program-date-time tag in this playlist
+ {
+ name: 'ProgramDateTime',
+ run: (syncController, playlist, duration, currentTimeline, currentTime) => {
+ if (!Object.keys(syncController.timelineToDatetimeMappings).length) {
+ return null;
+ }
+ let syncPoint = null;
+ let lastDistance = null;
+ const partsAndSegments = getPartsAndSegments(playlist);
+ currentTime = currentTime || 0;
+ for (let i = 0; i < partsAndSegments.length; i++) {
+ // start from the end and loop backwards for live
+ // or start from the front and loop forwards for non-live
+ const index = playlist.endList || currentTime === 0 ? i : partsAndSegments.length - (i + 1);
+ const partAndSegment = partsAndSegments[index];
+ const segment = partAndSegment.segment;
+ const datetimeMapping = syncController.timelineToDatetimeMappings[segment.timeline];
+ if (!datetimeMapping || !segment.dateTimeObject) {
+ continue;
+ }
+ const segmentTime = segment.dateTimeObject.getTime() / 1000;
+ let start = segmentTime + datetimeMapping; // take part duration into account.
+
+ if (segment.parts && typeof partAndSegment.partIndex === 'number') {
+ for (let z = 0; z < partAndSegment.partIndex; z++) {
+ start += segment.parts[z].duration;
+ }
+ }
+ const distance = Math.abs(currentTime - start); // Once the distance begins to increase, or if distance is 0, we have passed
+ // currentTime and can stop looking for better candidates
+
+ if (lastDistance !== null && (distance === 0 || lastDistance < distance)) {
+ break;
+ }
+ lastDistance = distance;
+ syncPoint = {
+ time: start,
+ segmentIndex: partAndSegment.segmentIndex,
+ partIndex: partAndSegment.partIndex
+ };
+ }
+ return syncPoint;
+ }
+ },
+ // Stategy "Segment": We have a known time mapping for a timeline and a
+ // segment in the current timeline with timing data
+ {
+ name: 'Segment',
+ run: (syncController, playlist, duration, currentTimeline, currentTime) => {
+ let syncPoint = null;
+ let lastDistance = null;
+ currentTime = currentTime || 0;
+ const partsAndSegments = getPartsAndSegments(playlist);
+ for (let i = 0; i < partsAndSegments.length; i++) {
+ // start from the end and loop backwards for live
+ // or start from the front and loop forwards for non-live
+ const index = playlist.endList || currentTime === 0 ? i : partsAndSegments.length - (i + 1);
+ const partAndSegment = partsAndSegments[index];
+ const segment = partAndSegment.segment;
+ const start = partAndSegment.part && partAndSegment.part.start || segment && segment.start;
+ if (segment.timeline === currentTimeline && typeof start !== 'undefined') {
+ const distance = Math.abs(currentTime - start); // Once the distance begins to increase, we have passed
+ // currentTime and can stop looking for better candidates
+
+ if (lastDistance !== null && lastDistance < distance) {
+ break;
+ }
+ if (!syncPoint || lastDistance === null || lastDistance >= distance) {
+ lastDistance = distance;
+ syncPoint = {
+ time: start,
+ segmentIndex: partAndSegment.segmentIndex,
+ partIndex: partAndSegment.partIndex
+ };
+ }
+ }
+ }
+ return syncPoint;
+ }
+ },
+ // Stategy "Discontinuity": We have a discontinuity with a known
+ // display-time
+ {
+ name: 'Discontinuity',
+ run: (syncController, playlist, duration, currentTimeline, currentTime) => {
+ let syncPoint = null;
+ currentTime = currentTime || 0;
+ if (playlist.discontinuityStarts && playlist.discontinuityStarts.length) {
+ let lastDistance = null;
+ for (let i = 0; i < playlist.discontinuityStarts.length; i++) {
+ const segmentIndex = playlist.discontinuityStarts[i];
+ const discontinuity = playlist.discontinuitySequence + i + 1;
+ const discontinuitySync = syncController.discontinuities[discontinuity];
+ if (discontinuitySync) {
+ const distance = Math.abs(currentTime - discontinuitySync.time); // Once the distance begins to increase, we have passed
+ // currentTime and can stop looking for better candidates
+
+ if (lastDistance !== null && lastDistance < distance) {
+ break;
+ }
+ if (!syncPoint || lastDistance === null || lastDistance >= distance) {
+ lastDistance = distance;
+ syncPoint = {
+ time: discontinuitySync.time,
+ segmentIndex,
+ partIndex: null
+ };
+ }
+ }
+ }
+ }
+ return syncPoint;
+ }
+ },
+ // Stategy "Playlist": We have a playlist with a known mapping of
+ // segment index to display time
+ {
+ name: 'Playlist',
+ run: (syncController, playlist, duration, currentTimeline, currentTime) => {
+ if (playlist.syncInfo) {
+ const syncPoint = {
+ time: playlist.syncInfo.time,
+ segmentIndex: playlist.syncInfo.mediaSequence - playlist.mediaSequence,
+ partIndex: null
+ };
+ return syncPoint;
+ }
+ return null;
+ }
+ }];
+ class SyncController extends videojs.EventTarget {
+ constructor(options = {}) {
+ super(); // ...for synching across variants
+
+ this.timelines = [];
+ this.discontinuities = [];
+ this.timelineToDatetimeMappings = {}; // TODO: this map should be only available for HLS. Since only HLS has MediaSequence.
+ // For some reason this map helps with syncing between quality switch for MPEG-DASH as well.
+ // Moreover if we disable this map for MPEG-DASH - quality switch will be broken.
+ // MPEG-DASH should have its own separate sync strategy
+
+ this.mediaSequenceStorage_ = {
+ main: new MediaSequenceSync(),
+ audio: new MediaSequenceSync(),
+ vtt: new MediaSequenceSync()
+ };
+ this.logger_ = logger('SyncController');
+ }
+ /**
+ *
+ * @param {string} loaderType
+ * @return {MediaSequenceSync|null}
+ */
+
+ getMediaSequenceSync(loaderType) {
+ return this.mediaSequenceStorage_[loaderType] || null;
+ }
+ /**
+ * Find a sync-point for the playlist specified
+ *
+ * A sync-point is defined as a known mapping from display-time to
+ * a segment-index in the current playlist.
+ *
+ * @param {Playlist} playlist
+ * The playlist that needs a sync-point
+ * @param {number} duration
+ * Duration of the MediaSource (Infinite if playing a live source)
+ * @param {number} currentTimeline
+ * The last timeline from which a segment was loaded
+ * @param {number} currentTime
+ * Current player's time
+ * @param {string} type
+ * Segment loader type
+ * @return {Object}
+ * A sync-point object
+ */
+
+ getSyncPoint(playlist, duration, currentTimeline, currentTime, type) {
+ // Always use VOD sync point for VOD
+ if (duration !== Infinity) {
+ const vodSyncPointStrategy = syncPointStrategies.find(({
+ name
+ }) => name === 'VOD');
+ return vodSyncPointStrategy.run(this, playlist, duration);
+ }
+ const syncPoints = this.runStrategies_(playlist, duration, currentTimeline, currentTime, type);
+ if (!syncPoints.length) {
+ // Signal that we need to attempt to get a sync-point manually
+ // by fetching a segment in the playlist and constructing
+ // a sync-point from that information
+ return null;
+ } // If we have exact match just return it instead of finding the nearest distance
+
+ for (const syncPointInfo of syncPoints) {
+ const {
+ syncPoint,
+ strategy
+ } = syncPointInfo;
+ const {
+ segmentIndex,
+ time
+ } = syncPoint;
+ if (segmentIndex < 0) {
+ continue;
+ }
+ const selectedSegment = playlist.segments[segmentIndex];
+ const start = time;
+ const end = start + selectedSegment.duration;
+ this.logger_(`Strategy: ${strategy}. Current time: ${currentTime}. selected segment: ${segmentIndex}. Time: [${start} -> ${end}]}`);
+ if (currentTime >= start && currentTime < end) {
+ this.logger_('Found sync point with exact match: ', syncPoint);
+ return syncPoint;
+ }
+ } // Now find the sync-point that is closest to the currentTime because
+ // that should result in the most accurate guess about which segment
+ // to fetch
+
+ return this.selectSyncPoint_(syncPoints, {
+ key: 'time',
+ value: currentTime
+ });
+ }
+ /**
+ * Calculate the amount of time that has expired off the playlist during playback
+ *
+ * @param {Playlist} playlist
+ * Playlist object to calculate expired from
+ * @param {number} duration
+ * Duration of the MediaSource (Infinity if playling a live source)
+ * @return {number|null}
+ * The amount of time that has expired off the playlist during playback. Null
+ * if no sync-points for the playlist can be found.
+ */
+
+ getExpiredTime(playlist, duration) {
+ if (!playlist || !playlist.segments) {
+ return null;
+ }
+ const syncPoints = this.runStrategies_(playlist, duration, playlist.discontinuitySequence, 0); // Without sync-points, there is not enough information to determine the expired time
+
+ if (!syncPoints.length) {
+ return null;
+ }
+ const syncPoint = this.selectSyncPoint_(syncPoints, {
+ key: 'segmentIndex',
+ value: 0
+ }); // If the sync-point is beyond the start of the playlist, we want to subtract the
+ // duration from index 0 to syncPoint.segmentIndex instead of adding.
+
+ if (syncPoint.segmentIndex > 0) {
+ syncPoint.time *= -1;
+ }
+ return Math.abs(syncPoint.time + sumDurations({
+ defaultDuration: playlist.targetDuration,
+ durationList: playlist.segments,
+ startIndex: syncPoint.segmentIndex,
+ endIndex: 0
+ }));
+ }
+ /**
+ * Runs each sync-point strategy and returns a list of sync-points returned by the
+ * strategies
+ *
+ * @private
+ * @param {Playlist} playlist
+ * The playlist that needs a sync-point
+ * @param {number} duration
+ * Duration of the MediaSource (Infinity if playing a live source)
+ * @param {number} currentTimeline
+ * The last timeline from which a segment was loaded
+ * @param {number} currentTime
+ * Current player's time
+ * @param {string} type
+ * Segment loader type
+ * @return {Array}
+ * A list of sync-point objects
+ */
+
+ runStrategies_(playlist, duration, currentTimeline, currentTime, type) {
+ const syncPoints = []; // Try to find a sync-point in by utilizing various strategies...
+
+ for (let i = 0; i < syncPointStrategies.length; i++) {
+ const strategy = syncPointStrategies[i];
+ const syncPoint = strategy.run(this, playlist, duration, currentTimeline, currentTime, type);
+ if (syncPoint) {
+ syncPoint.strategy = strategy.name;
+ syncPoints.push({
+ strategy: strategy.name,
+ syncPoint
+ });
+ }
+ }
+ return syncPoints;
+ }
+ /**
+ * Selects the sync-point nearest the specified target
+ *
+ * @private
+ * @param {Array} syncPoints
+ * List of sync-points to select from
+ * @param {Object} target
+ * Object specifying the property and value we are targeting
+ * @param {string} target.key
+ * Specifies the property to target. Must be either 'time' or 'segmentIndex'
+ * @param {number} target.value
+ * The value to target for the specified key.
+ * @return {Object}
+ * The sync-point nearest the target
+ */
+
+ selectSyncPoint_(syncPoints, target) {
+ let bestSyncPoint = syncPoints[0].syncPoint;
+ let bestDistance = Math.abs(syncPoints[0].syncPoint[target.key] - target.value);
+ let bestStrategy = syncPoints[0].strategy;
+ for (let i = 1; i < syncPoints.length; i++) {
+ const newDistance = Math.abs(syncPoints[i].syncPoint[target.key] - target.value);
+ if (newDistance < bestDistance) {
+ bestDistance = newDistance;
+ bestSyncPoint = syncPoints[i].syncPoint;
+ bestStrategy = syncPoints[i].strategy;
+ }
+ }
+ this.logger_(`syncPoint for [${target.key}: ${target.value}] chosen with strategy` + ` [${bestStrategy}]: [time:${bestSyncPoint.time},` + ` segmentIndex:${bestSyncPoint.segmentIndex}` + (typeof bestSyncPoint.partIndex === 'number' ? `,partIndex:${bestSyncPoint.partIndex}` : '') + ']');
+ return bestSyncPoint;
+ }
+ /**
+ * Save any meta-data present on the segments when segments leave
+ * the live window to the playlist to allow for synchronization at the
+ * playlist level later.
+ *
+ * @param {Playlist} oldPlaylist - The previous active playlist
+ * @param {Playlist} newPlaylist - The updated and most current playlist
+ */
+
+ saveExpiredSegmentInfo(oldPlaylist, newPlaylist) {
+ const mediaSequenceDiff = newPlaylist.mediaSequence - oldPlaylist.mediaSequence; // Ignore large media sequence gaps
+
+ if (mediaSequenceDiff > MAX_MEDIA_SEQUENCE_DIFF_FOR_SYNC) {
+ videojs.log.warn(`Not saving expired segment info. Media sequence gap ${mediaSequenceDiff} is too large.`);
+ return;
+ } // When a segment expires from the playlist and it has a start time
+ // save that information as a possible sync-point reference in future
+
+ for (let i = mediaSequenceDiff - 1; i >= 0; i--) {
+ const lastRemovedSegment = oldPlaylist.segments[i];
+ if (lastRemovedSegment && typeof lastRemovedSegment.start !== 'undefined') {
+ newPlaylist.syncInfo = {
+ mediaSequence: oldPlaylist.mediaSequence + i,
+ time: lastRemovedSegment.start
+ };
+ this.logger_(`playlist refresh sync: [time:${newPlaylist.syncInfo.time},` + ` mediaSequence: ${newPlaylist.syncInfo.mediaSequence}]`);
+ this.trigger('syncinfoupdate');
+ break;
+ }
+ }
+ }
+ /**
+ * Save the mapping from playlist's ProgramDateTime to display. This should only happen
+ * before segments start to load.
+ *
+ * @param {Playlist} playlist - The currently active playlist
+ */
+
+ setDateTimeMappingForStart(playlist) {
+ // It's possible for the playlist to be updated before playback starts, meaning time
+ // zero is not yet set. If, during these playlist refreshes, a discontinuity is
+ // crossed, then the old time zero mapping (for the prior timeline) would be retained
+ // unless the mappings are cleared.
+ this.timelineToDatetimeMappings = {};
+ if (playlist.segments && playlist.segments.length && playlist.segments[0].dateTimeObject) {
+ const firstSegment = playlist.segments[0];
+ const playlistTimestamp = firstSegment.dateTimeObject.getTime() / 1000;
+ this.timelineToDatetimeMappings[firstSegment.timeline] = -playlistTimestamp;
+ }
+ }
+ /**
+ * Calculates and saves timeline mappings, playlist sync info, and segment timing values
+ * based on the latest timing information.
+ *
+ * @param {Object} options
+ * Options object
+ * @param {SegmentInfo} options.segmentInfo
+ * The current active request information
+ * @param {boolean} options.shouldSaveTimelineMapping
+ * If there's a timeline change, determines if the timeline mapping should be
+ * saved for timeline mapping and program date time mappings.
+ */
+
+ saveSegmentTimingInfo({
+ segmentInfo,
+ shouldSaveTimelineMapping
+ }) {
+ const didCalculateSegmentTimeMapping = this.calculateSegmentTimeMapping_(segmentInfo, segmentInfo.timingInfo, shouldSaveTimelineMapping);
+ const segment = segmentInfo.segment;
+ if (didCalculateSegmentTimeMapping) {
+ this.saveDiscontinuitySyncInfo_(segmentInfo); // If the playlist does not have sync information yet, record that information
+ // now with segment timing information
+
+ if (!segmentInfo.playlist.syncInfo) {
+ segmentInfo.playlist.syncInfo = {
+ mediaSequence: segmentInfo.playlist.mediaSequence + segmentInfo.mediaIndex,
+ time: segment.start
+ };
+ }
+ }
+ const dateTime = segment.dateTimeObject;
+ if (segment.discontinuity && shouldSaveTimelineMapping && dateTime) {
+ this.timelineToDatetimeMappings[segment.timeline] = -(dateTime.getTime() / 1000);
+ }
+ }
+ timestampOffsetForTimeline(timeline) {
+ if (typeof this.timelines[timeline] === 'undefined') {
+ return null;
+ }
+ return this.timelines[timeline].time;
+ }
+ mappingForTimeline(timeline) {
+ if (typeof this.timelines[timeline] === 'undefined') {
+ return null;
+ }
+ return this.timelines[timeline].mapping;
+ }
+ /**
+ * Use the "media time" for a segment to generate a mapping to "display time" and
+ * save that display time to the segment.
+ *
+ * @private
+ * @param {SegmentInfo} segmentInfo
+ * The current active request information
+ * @param {Object} timingInfo
+ * The start and end time of the current segment in "media time"
+ * @param {boolean} shouldSaveTimelineMapping
+ * If there's a timeline change, determines if the timeline mapping should be
+ * saved in timelines.
+ * @return {boolean}
+ * Returns false if segment time mapping could not be calculated
+ */
+
+ calculateSegmentTimeMapping_(segmentInfo, timingInfo, shouldSaveTimelineMapping) {
+ // TODO: remove side effects
+ const segment = segmentInfo.segment;
+ const part = segmentInfo.part;
+ let mappingObj = this.timelines[segmentInfo.timeline];
+ let start;
+ let end;
+ if (typeof segmentInfo.timestampOffset === 'number') {
+ mappingObj = {
+ time: segmentInfo.startOfSegment,
+ mapping: segmentInfo.startOfSegment - timingInfo.start
+ };
+ if (shouldSaveTimelineMapping) {
+ this.timelines[segmentInfo.timeline] = mappingObj;
+ this.trigger('timestampoffset');
+ this.logger_(`time mapping for timeline ${segmentInfo.timeline}: ` + `[time: ${mappingObj.time}] [mapping: ${mappingObj.mapping}]`);
+ }
+ start = segmentInfo.startOfSegment;
+ end = timingInfo.end + mappingObj.mapping;
+ } else if (mappingObj) {
+ start = timingInfo.start + mappingObj.mapping;
+ end = timingInfo.end + mappingObj.mapping;
+ } else {
+ return false;
+ }
+ if (part) {
+ part.start = start;
+ part.end = end;
+ } // If we don't have a segment start yet or the start value we got
+ // is less than our current segment.start value, save a new start value.
+ // We have to do this because parts will have segment timing info saved
+ // multiple times and we want segment start to be the earliest part start
+ // value for that segment.
+
+ if (!segment.start || start < segment.start) {
+ segment.start = start;
+ }
+ segment.end = end;
+ return true;
+ }
+ /**
+ * Each time we have discontinuity in the playlist, attempt to calculate the location
+ * in display of the start of the discontinuity and save that. We also save an accuracy
+ * value so that we save values with the most accuracy (closest to 0.)
+ *
+ * @private
+ * @param {SegmentInfo} segmentInfo - The current active request information
+ */
+
+ saveDiscontinuitySyncInfo_(segmentInfo) {
+ const playlist = segmentInfo.playlist;
+ const segment = segmentInfo.segment; // If the current segment is a discontinuity then we know exactly where
+ // the start of the range and it's accuracy is 0 (greater accuracy values
+ // mean more approximation)
+
+ if (segment.discontinuity) {
+ this.discontinuities[segment.timeline] = {
+ time: segment.start,
+ accuracy: 0
+ };
+ } else if (playlist.discontinuityStarts && playlist.discontinuityStarts.length) {
+ // Search for future discontinuities that we can provide better timing
+ // information for and save that information for sync purposes
+ for (let i = 0; i < playlist.discontinuityStarts.length; i++) {
+ const segmentIndex = playlist.discontinuityStarts[i];
+ const discontinuity = playlist.discontinuitySequence + i + 1;
+ const mediaIndexDiff = segmentIndex - segmentInfo.mediaIndex;
+ const accuracy = Math.abs(mediaIndexDiff);
+ if (!this.discontinuities[discontinuity] || this.discontinuities[discontinuity].accuracy > accuracy) {
+ let time;
+ if (mediaIndexDiff < 0) {
+ time = segment.start - sumDurations({
+ defaultDuration: playlist.targetDuration,
+ durationList: playlist.segments,
+ startIndex: segmentInfo.mediaIndex,
+ endIndex: segmentIndex
+ });
+ } else {
+ time = segment.end + sumDurations({
+ defaultDuration: playlist.targetDuration,
+ durationList: playlist.segments,
+ startIndex: segmentInfo.mediaIndex + 1,
+ endIndex: segmentIndex
+ });
+ }
+ this.discontinuities[discontinuity] = {
+ time,
+ accuracy
+ };
+ }
+ }
+ }
+ }
+ dispose() {
+ this.trigger('dispose');
+ this.off();
+ }
+ }
+
+ /**
+ * The TimelineChangeController acts as a source for segment loaders to listen for and
+ * keep track of latest and pending timeline changes. This is useful to ensure proper
+ * sync, as each loader may need to make a consideration for what timeline the other
+ * loader is on before making changes which could impact the other loader's media.
+ *
+ * @class TimelineChangeController
+ * @extends videojs.EventTarget
+ */
+
+ class TimelineChangeController extends videojs.EventTarget {
+ constructor() {
+ super();
+ this.pendingTimelineChanges_ = {};
+ this.lastTimelineChanges_ = {};
+ }
+ clearPendingTimelineChange(type) {
+ this.pendingTimelineChanges_[type] = null;
+ this.trigger('pendingtimelinechange');
+ }
+ pendingTimelineChange({
+ type,
+ from,
+ to
+ }) {
+ if (typeof from === 'number' && typeof to === 'number') {
+ this.pendingTimelineChanges_[type] = {
+ type,
+ from,
+ to
+ };
+ this.trigger('pendingtimelinechange');
+ }
+ return this.pendingTimelineChanges_[type];
+ }
+ lastTimelineChange({
+ type,
+ from,
+ to
+ }) {
+ if (typeof from === 'number' && typeof to === 'number') {
+ this.lastTimelineChanges_[type] = {
+ type,
+ from,
+ to
+ };
+ delete this.pendingTimelineChanges_[type];
+ this.trigger('timelinechange');
+ }
+ return this.lastTimelineChanges_[type];
+ }
+ dispose() {
+ this.trigger('dispose');
+ this.pendingTimelineChanges_ = {};
+ this.lastTimelineChanges_ = {};
+ this.off();
+ }
+ }
+
+ /* rollup-plugin-worker-factory start for worker!/home/runner/work/http-streaming/http-streaming/src/decrypter-worker.js */
+ const workerCode = transform(getWorkerString(function () {
+ /**
+ * @file stream.js
+ */
+
+ /**
+ * A lightweight readable stream implemention that handles event dispatching.
+ *
+ * @class Stream
+ */
+
+ var Stream = /*#__PURE__*/function () {
+ function Stream() {
+ this.listeners = {};
+ }
+ /**
+ * Add a listener for a specified event type.
+ *
+ * @param {string} type the event name
+ * @param {Function} listener the callback to be invoked when an event of
+ * the specified type occurs
+ */
+
+ var _proto = Stream.prototype;
+ _proto.on = function on(type, listener) {
+ if (!this.listeners[type]) {
+ this.listeners[type] = [];
+ }
+ this.listeners[type].push(listener);
+ }
+ /**
+ * Remove a listener for a specified event type.
+ *
+ * @param {string} type the event name
+ * @param {Function} listener a function previously registered for this
+ * type of event through `on`
+ * @return {boolean} if we could turn it off or not
+ */;
+
+ _proto.off = function off(type, listener) {
+ if (!this.listeners[type]) {
+ return false;
+ }
+ var index = this.listeners[type].indexOf(listener); // TODO: which is better?
+ // In Video.js we slice listener functions
+ // on trigger so that it does not mess up the order
+ // while we loop through.
+ //
+ // Here we slice on off so that the loop in trigger
+ // can continue using it's old reference to loop without
+ // messing up the order.
+
+ this.listeners[type] = this.listeners[type].slice(0);
+ this.listeners[type].splice(index, 1);
+ return index > -1;
+ }
+ /**
+ * Trigger an event of the specified type on this stream. Any additional
+ * arguments to this function are passed as parameters to event listeners.
+ *
+ * @param {string} type the event name
+ */;
+
+ _proto.trigger = function trigger(type) {
+ var callbacks = this.listeners[type];
+ if (!callbacks) {
+ return;
+ } // Slicing the arguments on every invocation of this method
+ // can add a significant amount of overhead. Avoid the
+ // intermediate object creation for the common case of a
+ // single callback argument
+
+ if (arguments.length === 2) {
+ var length = callbacks.length;
+ for (var i = 0; i < length; ++i) {
+ callbacks[i].call(this, arguments[1]);
+ }
+ } else {
+ var args = Array.prototype.slice.call(arguments, 1);
+ var _length = callbacks.length;
+ for (var _i = 0; _i < _length; ++_i) {
+ callbacks[_i].apply(this, args);
+ }
+ }
+ }
+ /**
+ * Destroys the stream and cleans up.
+ */;
+
+ _proto.dispose = function dispose() {
+ this.listeners = {};
+ }
+ /**
+ * Forwards all `data` events on this stream to the destination stream. The
+ * destination stream should provide a method `push` to receive the data
+ * events as they arrive.
+ *
+ * @param {Stream} destination the stream that will receive all `data` events
+ * @see http://nodejs.org/api/stream.html#stream_readable_pipe_destination_options
+ */;
+
+ _proto.pipe = function pipe(destination) {
+ this.on('data', function (data) {
+ destination.push(data);
+ });
+ };
+ return Stream;
+ }();
+ /*! @name pkcs7 @version 1.0.4 @license Apache-2.0 */
+
+ /**
+ * Returns the subarray of a Uint8Array without PKCS#7 padding.
+ *
+ * @param padded {Uint8Array} unencrypted bytes that have been padded
+ * @return {Uint8Array} the unpadded bytes
+ * @see http://tools.ietf.org/html/rfc5652
+ */
+
+ function unpad(padded) {
+ return padded.subarray(0, padded.byteLength - padded[padded.byteLength - 1]);
+ }
+ /*! @name aes-decrypter @version 4.0.1 @license Apache-2.0 */
+
+ /**
+ * @file aes.js
+ *
+ * This file contains an adaptation of the AES decryption algorithm
+ * from the Standford Javascript Cryptography Library. That work is
+ * covered by the following copyright and permissions notice:
+ *
+ * Copyright 2009-2010 Emily Stark, Mike Hamburg, Dan Boneh.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation
+ * are those of the authors and should not be interpreted as representing
+ * official policies, either expressed or implied, of the authors.
+ */
+
+ /**
+ * Expand the S-box tables.
+ *
+ * @private
+ */
+
+ const precompute = function () {
+ const tables = [[[], [], [], [], []], [[], [], [], [], []]];
+ const encTable = tables[0];
+ const decTable = tables[1];
+ const sbox = encTable[4];
+ const sboxInv = decTable[4];
+ let i;
+ let x;
+ let xInv;
+ const d = [];
+ const th = [];
+ let x2;
+ let x4;
+ let x8;
+ let s;
+ let tEnc;
+ let tDec; // Compute double and third tables
+
+ for (i = 0; i < 256; i++) {
+ th[(d[i] = i << 1 ^ (i >> 7) * 283) ^ i] = i;
+ }
+ for (x = xInv = 0; !sbox[x]; x ^= x2 || 1, xInv = th[xInv] || 1) {
+ // Compute sbox
+ s = xInv ^ xInv << 1 ^ xInv << 2 ^ xInv << 3 ^ xInv << 4;
+ s = s >> 8 ^ s & 255 ^ 99;
+ sbox[x] = s;
+ sboxInv[s] = x; // Compute MixColumns
+
+ x8 = d[x4 = d[x2 = d[x]]];
+ tDec = x8 * 0x1010101 ^ x4 * 0x10001 ^ x2 * 0x101 ^ x * 0x1010100;
+ tEnc = d[s] * 0x101 ^ s * 0x1010100;
+ for (i = 0; i < 4; i++) {
+ encTable[i][x] = tEnc = tEnc << 24 ^ tEnc >>> 8;
+ decTable[i][s] = tDec = tDec << 24 ^ tDec >>> 8;
+ }
+ } // Compactify. Considerable speedup on Firefox.
+
+ for (i = 0; i < 5; i++) {
+ encTable[i] = encTable[i].slice(0);
+ decTable[i] = decTable[i].slice(0);
+ }
+ return tables;
+ };
+ let aesTables = null;
+ /**
+ * Schedule out an AES key for both encryption and decryption. This
+ * is a low-level class. Use a cipher mode to do bulk encryption.
+ *
+ * @class AES
+ * @param key {Array} The key as an array of 4, 6 or 8 words.
+ */
+
+ class AES {
+ constructor(key) {
+ /**
+ * The expanded S-box and inverse S-box tables. These will be computed
+ * on the client so that we don't have to send them down the wire.
+ *
+ * There are two tables, _tables[0] is for encryption and
+ * _tables[1] is for decryption.
+ *
+ * The first 4 sub-tables are the expanded S-box with MixColumns. The
+ * last (_tables[01][4]) is the S-box itself.
+ *
+ * @private
+ */
+ // if we have yet to precompute the S-box tables
+ // do so now
+ if (!aesTables) {
+ aesTables = precompute();
+ } // then make a copy of that object for use
+
+ this._tables = [[aesTables[0][0].slice(), aesTables[0][1].slice(), aesTables[0][2].slice(), aesTables[0][3].slice(), aesTables[0][4].slice()], [aesTables[1][0].slice(), aesTables[1][1].slice(), aesTables[1][2].slice(), aesTables[1][3].slice(), aesTables[1][4].slice()]];
+ let i;
+ let j;
+ let tmp;
+ const sbox = this._tables[0][4];
+ const decTable = this._tables[1];
+ const keyLen = key.length;
+ let rcon = 1;
+ if (keyLen !== 4 && keyLen !== 6 && keyLen !== 8) {
+ throw new Error('Invalid aes key size');
+ }
+ const encKey = key.slice(0);
+ const decKey = [];
+ this._key = [encKey, decKey]; // schedule encryption keys
+
+ for (i = keyLen; i < 4 * keyLen + 28; i++) {
+ tmp = encKey[i - 1]; // apply sbox
+
+ if (i % keyLen === 0 || keyLen === 8 && i % keyLen === 4) {
+ tmp = sbox[tmp >>> 24] << 24 ^ sbox[tmp >> 16 & 255] << 16 ^ sbox[tmp >> 8 & 255] << 8 ^ sbox[tmp & 255]; // shift rows and add rcon
+
+ if (i % keyLen === 0) {
+ tmp = tmp << 8 ^ tmp >>> 24 ^ rcon << 24;
+ rcon = rcon << 1 ^ (rcon >> 7) * 283;
+ }
+ }
+ encKey[i] = encKey[i - keyLen] ^ tmp;
+ } // schedule decryption keys
+
+ for (j = 0; i; j++, i--) {
+ tmp = encKey[j & 3 ? i : i - 4];
+ if (i <= 4 || j < 4) {
+ decKey[j] = tmp;
+ } else {
+ decKey[j] = decTable[0][sbox[tmp >>> 24]] ^ decTable[1][sbox[tmp >> 16 & 255]] ^ decTable[2][sbox[tmp >> 8 & 255]] ^ decTable[3][sbox[tmp & 255]];
+ }
+ }
+ }
+ /**
+ * Decrypt 16 bytes, specified as four 32-bit words.
+ *
+ * @param {number} encrypted0 the first word to decrypt
+ * @param {number} encrypted1 the second word to decrypt
+ * @param {number} encrypted2 the third word to decrypt
+ * @param {number} encrypted3 the fourth word to decrypt
+ * @param {Int32Array} out the array to write the decrypted words
+ * into
+ * @param {number} offset the offset into the output array to start
+ * writing results
+ * @return {Array} The plaintext.
+ */
+
+ decrypt(encrypted0, encrypted1, encrypted2, encrypted3, out, offset) {
+ const key = this._key[1]; // state variables a,b,c,d are loaded with pre-whitened data
+
+ let a = encrypted0 ^ key[0];
+ let b = encrypted3 ^ key[1];
+ let c = encrypted2 ^ key[2];
+ let d = encrypted1 ^ key[3];
+ let a2;
+ let b2;
+ let c2; // key.length === 2 ?
+
+ const nInnerRounds = key.length / 4 - 2;
+ let i;
+ let kIndex = 4;
+ const table = this._tables[1]; // load up the tables
+
+ const table0 = table[0];
+ const table1 = table[1];
+ const table2 = table[2];
+ const table3 = table[3];
+ const sbox = table[4]; // Inner rounds. Cribbed from OpenSSL.
+
+ for (i = 0; i < nInnerRounds; i++) {
+ a2 = table0[a >>> 24] ^ table1[b >> 16 & 255] ^ table2[c >> 8 & 255] ^ table3[d & 255] ^ key[kIndex];
+ b2 = table0[b >>> 24] ^ table1[c >> 16 & 255] ^ table2[d >> 8 & 255] ^ table3[a & 255] ^ key[kIndex + 1];
+ c2 = table0[c >>> 24] ^ table1[d >> 16 & 255] ^ table2[a >> 8 & 255] ^ table3[b & 255] ^ key[kIndex + 2];
+ d = table0[d >>> 24] ^ table1[a >> 16 & 255] ^ table2[b >> 8 & 255] ^ table3[c & 255] ^ key[kIndex + 3];
+ kIndex += 4;
+ a = a2;
+ b = b2;
+ c = c2;
+ } // Last round.
+
+ for (i = 0; i < 4; i++) {
+ out[(3 & -i) + offset] = sbox[a >>> 24] << 24 ^ sbox[b >> 16 & 255] << 16 ^ sbox[c >> 8 & 255] << 8 ^ sbox[d & 255] ^ key[kIndex++];
+ a2 = a;
+ a = b;
+ b = c;
+ c = d;
+ d = a2;
+ }
+ }
+ }
+ /**
+ * @file async-stream.js
+ */
+
+ /**
+ * A wrapper around the Stream class to use setTimeout
+ * and run stream "jobs" Asynchronously
+ *
+ * @class AsyncStream
+ * @extends Stream
+ */
+
+ class AsyncStream extends Stream {
+ constructor() {
+ super(Stream);
+ this.jobs = [];
+ this.delay = 1;
+ this.timeout_ = null;
+ }
+ /**
+ * process an async job
+ *
+ * @private
+ */
+
+ processJob_() {
+ this.jobs.shift()();
+ if (this.jobs.length) {
+ this.timeout_ = setTimeout(this.processJob_.bind(this), this.delay);
+ } else {
+ this.timeout_ = null;
+ }
+ }
+ /**
+ * push a job into the stream
+ *
+ * @param {Function} job the job to push into the stream
+ */
+
+ push(job) {
+ this.jobs.push(job);
+ if (!this.timeout_) {
+ this.timeout_ = setTimeout(this.processJob_.bind(this), this.delay);
+ }
+ }
+ }
+ /**
+ * @file decrypter.js
+ *
+ * An asynchronous implementation of AES-128 CBC decryption with
+ * PKCS#7 padding.
+ */
+
+ /**
+ * Convert network-order (big-endian) bytes into their little-endian
+ * representation.
+ */
+
+ const ntoh = function (word) {
+ return word << 24 | (word & 0xff00) << 8 | (word & 0xff0000) >> 8 | word >>> 24;
+ };
+ /**
+ * Decrypt bytes using AES-128 with CBC and PKCS#7 padding.
+ *
+ * @param {Uint8Array} encrypted the encrypted bytes
+ * @param {Uint32Array} key the bytes of the decryption key
+ * @param {Uint32Array} initVector the initialization vector (IV) to
+ * use for the first round of CBC.
+ * @return {Uint8Array} the decrypted bytes
+ *
+ * @see http://en.wikipedia.org/wiki/Advanced_Encryption_Standard
+ * @see http://en.wikipedia.org/wiki/Block_cipher_mode_of_operation#Cipher_Block_Chaining_.28CBC.29
+ * @see https://tools.ietf.org/html/rfc2315
+ */
+
+ const decrypt = function (encrypted, key, initVector) {
+ // word-level access to the encrypted bytes
+ const encrypted32 = new Int32Array(encrypted.buffer, encrypted.byteOffset, encrypted.byteLength >> 2);
+ const decipher = new AES(Array.prototype.slice.call(key)); // byte and word-level access for the decrypted output
+
+ const decrypted = new Uint8Array(encrypted.byteLength);
+ const decrypted32 = new Int32Array(decrypted.buffer); // temporary variables for working with the IV, encrypted, and
+ // decrypted data
+
+ let init0;
+ let init1;
+ let init2;
+ let init3;
+ let encrypted0;
+ let encrypted1;
+ let encrypted2;
+ let encrypted3; // iteration variable
+
+ let wordIx; // pull out the words of the IV to ensure we don't modify the
+ // passed-in reference and easier access
+
+ init0 = initVector[0];
+ init1 = initVector[1];
+ init2 = initVector[2];
+ init3 = initVector[3]; // decrypt four word sequences, applying cipher-block chaining (CBC)
+ // to each decrypted block
+
+ for (wordIx = 0; wordIx < encrypted32.length; wordIx += 4) {
+ // convert big-endian (network order) words into little-endian
+ // (javascript order)
+ encrypted0 = ntoh(encrypted32[wordIx]);
+ encrypted1 = ntoh(encrypted32[wordIx + 1]);
+ encrypted2 = ntoh(encrypted32[wordIx + 2]);
+ encrypted3 = ntoh(encrypted32[wordIx + 3]); // decrypt the block
+
+ decipher.decrypt(encrypted0, encrypted1, encrypted2, encrypted3, decrypted32, wordIx); // XOR with the IV, and restore network byte-order to obtain the
+ // plaintext
+
+ decrypted32[wordIx] = ntoh(decrypted32[wordIx] ^ init0);
+ decrypted32[wordIx + 1] = ntoh(decrypted32[wordIx + 1] ^ init1);
+ decrypted32[wordIx + 2] = ntoh(decrypted32[wordIx + 2] ^ init2);
+ decrypted32[wordIx + 3] = ntoh(decrypted32[wordIx + 3] ^ init3); // setup the IV for the next round
+
+ init0 = encrypted0;
+ init1 = encrypted1;
+ init2 = encrypted2;
+ init3 = encrypted3;
+ }
+ return decrypted;
+ };
+ /**
+ * The `Decrypter` class that manages decryption of AES
+ * data through `AsyncStream` objects and the `decrypt`
+ * function
+ *
+ * @param {Uint8Array} encrypted the encrypted bytes
+ * @param {Uint32Array} key the bytes of the decryption key
+ * @param {Uint32Array} initVector the initialization vector (IV) to
+ * @param {Function} done the function to run when done
+ * @class Decrypter
+ */
+
+ class Decrypter {
+ constructor(encrypted, key, initVector, done) {
+ const step = Decrypter.STEP;
+ const encrypted32 = new Int32Array(encrypted.buffer);
+ const decrypted = new Uint8Array(encrypted.byteLength);
+ let i = 0;
+ this.asyncStream_ = new AsyncStream(); // split up the encryption job and do the individual chunks asynchronously
+
+ this.asyncStream_.push(this.decryptChunk_(encrypted32.subarray(i, i + step), key, initVector, decrypted));
+ for (i = step; i < encrypted32.length; i += step) {
+ initVector = new Uint32Array([ntoh(encrypted32[i - 4]), ntoh(encrypted32[i - 3]), ntoh(encrypted32[i - 2]), ntoh(encrypted32[i - 1])]);
+ this.asyncStream_.push(this.decryptChunk_(encrypted32.subarray(i, i + step), key, initVector, decrypted));
+ } // invoke the done() callback when everything is finished
+
+ this.asyncStream_.push(function () {
+ // remove pkcs#7 padding from the decrypted bytes
+ done(null, unpad(decrypted));
+ });
+ }
+ /**
+ * a getter for step the maximum number of bytes to process at one time
+ *
+ * @return {number} the value of step 32000
+ */
+
+ static get STEP() {
+ // 4 * 8000;
+ return 32000;
+ }
+ /**
+ * @private
+ */
+
+ decryptChunk_(encrypted, key, initVector, decrypted) {
+ return function () {
+ const bytes = decrypt(encrypted, key, initVector);
+ decrypted.set(bytes, encrypted.byteOffset);
+ };
+ }
+ }
+ var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};
+ var win;
+ if (typeof window !== "undefined") {
+ win = window;
+ } else if (typeof commonjsGlobal !== "undefined") {
+ win = commonjsGlobal;
+ } else if (typeof self !== "undefined") {
+ win = self;
+ } else {
+ win = {};
+ }
+ var window_1 = win;
+ var isArrayBufferView = function isArrayBufferView(obj) {
+ if (ArrayBuffer.isView === 'function') {
+ return ArrayBuffer.isView(obj);
+ }
+ return obj && obj.buffer instanceof ArrayBuffer;
+ };
+ var BigInt = window_1.BigInt || Number;
+ [BigInt('0x1'), BigInt('0x100'), BigInt('0x10000'), BigInt('0x1000000'), BigInt('0x100000000'), BigInt('0x10000000000'), BigInt('0x1000000000000'), BigInt('0x100000000000000'), BigInt('0x10000000000000000')];
+ (function () {
+ var a = new Uint16Array([0xFFCC]);
+ var b = new Uint8Array(a.buffer, a.byteOffset, a.byteLength);
+ if (b[0] === 0xFF) {
+ return 'big';
+ }
+ if (b[0] === 0xCC) {
+ return 'little';
+ }
+ return 'unknown';
+ })();
+ /**
+ * Creates an object for sending to a web worker modifying properties that are TypedArrays
+ * into a new object with seperated properties for the buffer, byteOffset, and byteLength.
+ *
+ * @param {Object} message
+ * Object of properties and values to send to the web worker
+ * @return {Object}
+ * Modified message with TypedArray values expanded
+ * @function createTransferableMessage
+ */
+
+ const createTransferableMessage = function (message) {
+ const transferable = {};
+ Object.keys(message).forEach(key => {
+ const value = message[key];
+ if (isArrayBufferView(value)) {
+ transferable[key] = {
+ bytes: value.buffer,
+ byteOffset: value.byteOffset,
+ byteLength: value.byteLength
+ };
+ } else {
+ transferable[key] = value;
+ }
+ });
+ return transferable;
+ };
+ /* global self */
+
+ /**
+ * Our web worker interface so that things can talk to aes-decrypter
+ * that will be running in a web worker. the scope is passed to this by
+ * webworkify.
+ */
+
+ self.onmessage = function (event) {
+ const data = event.data;
+ const encrypted = new Uint8Array(data.encrypted.bytes, data.encrypted.byteOffset, data.encrypted.byteLength);
+ const key = new Uint32Array(data.key.bytes, data.key.byteOffset, data.key.byteLength / 4);
+ const iv = new Uint32Array(data.iv.bytes, data.iv.byteOffset, data.iv.byteLength / 4);
+ /* eslint-disable no-new, handle-callback-err */
+
+ new Decrypter(encrypted, key, iv, function (err, bytes) {
+ self.postMessage(createTransferableMessage({
+ source: data.source,
+ decrypted: bytes
+ }), [bytes.buffer]);
+ });
+ /* eslint-enable */
+ };
+ }));
+
+ var Decrypter = factory(workerCode);
+ /* rollup-plugin-worker-factory end for worker!/home/runner/work/http-streaming/http-streaming/src/decrypter-worker.js */
+
+ /**
+ * Convert the properties of an HLS track into an audioTrackKind.
+ *
+ * @private
+ */
+
+ const audioTrackKind_ = properties => {
+ let kind = properties.default ? 'main' : 'alternative';
+ if (properties.characteristics && properties.characteristics.indexOf('public.accessibility.describes-video') >= 0) {
+ kind = 'main-desc';
+ }
+ return kind;
+ };
+ /**
+ * Pause provided segment loader and playlist loader if active
+ *
+ * @param {SegmentLoader} segmentLoader
+ * SegmentLoader to pause
+ * @param {Object} mediaType
+ * Active media type
+ * @function stopLoaders
+ */
+
+ const stopLoaders = (segmentLoader, mediaType) => {
+ segmentLoader.abort();
+ segmentLoader.pause();
+ if (mediaType && mediaType.activePlaylistLoader) {
+ mediaType.activePlaylistLoader.pause();
+ mediaType.activePlaylistLoader = null;
+ }
+ };
+ /**
+ * Start loading provided segment loader and playlist loader
+ *
+ * @param {PlaylistLoader} playlistLoader
+ * PlaylistLoader to start loading
+ * @param {Object} mediaType
+ * Active media type
+ * @function startLoaders
+ */
+
+ const startLoaders = (playlistLoader, mediaType) => {
+ // Segment loader will be started after `loadedmetadata` or `loadedplaylist` from the
+ // playlist loader
+ mediaType.activePlaylistLoader = playlistLoader;
+ playlistLoader.load();
+ };
+ /**
+ * Returns a function to be called when the media group changes. It performs a
+ * non-destructive (preserve the buffer) resync of the SegmentLoader. This is because a
+ * change of group is merely a rendition switch of the same content at another encoding,
+ * rather than a change of content, such as switching audio from English to Spanish.
+ *
+ * @param {string} type
+ * MediaGroup type
+ * @param {Object} settings
+ * Object containing required information for media groups
+ * @return {Function}
+ * Handler for a non-destructive resync of SegmentLoader when the active media
+ * group changes.
+ * @function onGroupChanged
+ */
+
+ const onGroupChanged = (type, settings) => () => {
+ const {
+ segmentLoaders: {
+ [type]: segmentLoader,
+ main: mainSegmentLoader
+ },
+ mediaTypes: {
+ [type]: mediaType
+ }
+ } = settings;
+ const activeTrack = mediaType.activeTrack();
+ const activeGroup = mediaType.getActiveGroup();
+ const previousActiveLoader = mediaType.activePlaylistLoader;
+ const lastGroup = mediaType.lastGroup_; // the group did not change do nothing
+
+ if (activeGroup && lastGroup && activeGroup.id === lastGroup.id) {
+ return;
+ }
+ mediaType.lastGroup_ = activeGroup;
+ mediaType.lastTrack_ = activeTrack;
+ stopLoaders(segmentLoader, mediaType);
+ if (!activeGroup || activeGroup.isMainPlaylist) {
+ // there is no group active or active group is a main playlist and won't change
+ return;
+ }
+ if (!activeGroup.playlistLoader) {
+ if (previousActiveLoader) {
+ // The previous group had a playlist loader but the new active group does not
+ // this means we are switching from demuxed to muxed audio. In this case we want to
+ // do a destructive reset of the main segment loader and not restart the audio
+ // loaders.
+ mainSegmentLoader.resetEverything();
+ }
+ return;
+ } // Non-destructive resync
+
+ segmentLoader.resyncLoader();
+ startLoaders(activeGroup.playlistLoader, mediaType);
+ };
+ const onGroupChanging = (type, settings) => () => {
+ const {
+ segmentLoaders: {
+ [type]: segmentLoader
+ },
+ mediaTypes: {
+ [type]: mediaType
+ }
+ } = settings;
+ mediaType.lastGroup_ = null;
+ segmentLoader.abort();
+ segmentLoader.pause();
+ };
+ /**
+ * Returns a function to be called when the media track changes. It performs a
+ * destructive reset of the SegmentLoader to ensure we start loading as close to
+ * currentTime as possible.
+ *
+ * @param {string} type
+ * MediaGroup type
+ * @param {Object} settings
+ * Object containing required information for media groups
+ * @return {Function}
+ * Handler for a destructive reset of SegmentLoader when the active media
+ * track changes.
+ * @function onTrackChanged
+ */
+
+ const onTrackChanged = (type, settings) => () => {
+ const {
+ mainPlaylistLoader,
+ segmentLoaders: {
+ [type]: segmentLoader,
+ main: mainSegmentLoader
+ },
+ mediaTypes: {
+ [type]: mediaType
+ }
+ } = settings;
+ const activeTrack = mediaType.activeTrack();
+ const activeGroup = mediaType.getActiveGroup();
+ const previousActiveLoader = mediaType.activePlaylistLoader;
+ const lastTrack = mediaType.lastTrack_; // track did not change, do nothing
+
+ if (lastTrack && activeTrack && lastTrack.id === activeTrack.id) {
+ return;
+ }
+ mediaType.lastGroup_ = activeGroup;
+ mediaType.lastTrack_ = activeTrack;
+ stopLoaders(segmentLoader, mediaType);
+ if (!activeGroup) {
+ // there is no group active so we do not want to restart loaders
+ return;
+ }
+ if (activeGroup.isMainPlaylist) {
+ // track did not change, do nothing
+ if (!activeTrack || !lastTrack || activeTrack.id === lastTrack.id) {
+ return;
+ }
+ const pc = settings.vhs.playlistController_;
+ const newPlaylist = pc.selectPlaylist(); // media will not change do nothing
+
+ if (pc.media() === newPlaylist) {
+ return;
+ }
+ mediaType.logger_(`track change. Switching main audio from ${lastTrack.id} to ${activeTrack.id}`);
+ mainPlaylistLoader.pause();
+ mainSegmentLoader.resetEverything();
+ pc.fastQualityChange_(newPlaylist);
+ return;
+ }
+ if (type === 'AUDIO') {
+ if (!activeGroup.playlistLoader) {
+ // when switching from demuxed audio/video to muxed audio/video (noted by no
+ // playlist loader for the audio group), we want to do a destructive reset of the
+ // main segment loader and not restart the audio loaders
+ mainSegmentLoader.setAudio(true); // don't have to worry about disabling the audio of the audio segment loader since
+ // it should be stopped
+
+ mainSegmentLoader.resetEverything();
+ return;
+ } // although the segment loader is an audio segment loader, call the setAudio
+ // function to ensure it is prepared to re-append the init segment (or handle other
+ // config changes)
+
+ segmentLoader.setAudio(true);
+ mainSegmentLoader.setAudio(false);
+ }
+ if (previousActiveLoader === activeGroup.playlistLoader) {
+ // Nothing has actually changed. This can happen because track change events can fire
+ // multiple times for a "single" change. One for enabling the new active track, and
+ // one for disabling the track that was active
+ startLoaders(activeGroup.playlistLoader, mediaType);
+ return;
+ }
+ if (segmentLoader.track) {
+ // For WebVTT, set the new text track in the segmentloader
+ segmentLoader.track(activeTrack);
+ } // destructive reset
+
+ segmentLoader.resetEverything();
+ startLoaders(activeGroup.playlistLoader, mediaType);
+ };
+ const onError = {
+ /**
+ * Returns a function to be called when a SegmentLoader or PlaylistLoader encounters
+ * an error.
+ *
+ * @param {string} type
+ * MediaGroup type
+ * @param {Object} settings
+ * Object containing required information for media groups
+ * @return {Function}
+ * Error handler. Logs warning (or error if the playlist is excluded) to
+ * console and switches back to default audio track.
+ * @function onError.AUDIO
+ */
+ AUDIO: (type, settings) => () => {
+ const {
+ mediaTypes: {
+ [type]: mediaType
+ },
+ excludePlaylist
+ } = settings; // switch back to default audio track
+
+ const activeTrack = mediaType.activeTrack();
+ const activeGroup = mediaType.activeGroup();
+ const id = (activeGroup.filter(group => group.default)[0] || activeGroup[0]).id;
+ const defaultTrack = mediaType.tracks[id];
+ if (activeTrack === defaultTrack) {
+ // Default track encountered an error. All we can do now is exclude the current
+ // rendition and hope another will switch audio groups
+ excludePlaylist({
+ error: {
+ message: 'Problem encountered loading the default audio track.'
+ }
+ });
+ return;
+ }
+ videojs.log.warn('Problem encountered loading the alternate audio track.' + 'Switching back to default.');
+ for (const trackId in mediaType.tracks) {
+ mediaType.tracks[trackId].enabled = mediaType.tracks[trackId] === defaultTrack;
+ }
+ mediaType.onTrackChanged();
+ },
+ /**
+ * Returns a function to be called when a SegmentLoader or PlaylistLoader encounters
+ * an error.
+ *
+ * @param {string} type
+ * MediaGroup type
+ * @param {Object} settings
+ * Object containing required information for media groups
+ * @return {Function}
+ * Error handler. Logs warning to console and disables the active subtitle track
+ * @function onError.SUBTITLES
+ */
+ SUBTITLES: (type, settings) => () => {
+ const {
+ mediaTypes: {
+ [type]: mediaType
+ }
+ } = settings;
+ videojs.log.warn('Problem encountered loading the subtitle track.' + 'Disabling subtitle track.');
+ const track = mediaType.activeTrack();
+ if (track) {
+ track.mode = 'disabled';
+ }
+ mediaType.onTrackChanged();
+ }
+ };
+ const setupListeners = {
+ /**
+ * Setup event listeners for audio playlist loader
+ *
+ * @param {string} type
+ * MediaGroup type
+ * @param {PlaylistLoader|null} playlistLoader
+ * PlaylistLoader to register listeners on
+ * @param {Object} settings
+ * Object containing required information for media groups
+ * @function setupListeners.AUDIO
+ */
+ AUDIO: (type, playlistLoader, settings) => {
+ if (!playlistLoader) {
+ // no playlist loader means audio will be muxed with the video
+ return;
+ }
+ const {
+ tech,
+ requestOptions,
+ segmentLoaders: {
+ [type]: segmentLoader
+ }
+ } = settings;
+ playlistLoader.on('loadedmetadata', () => {
+ const media = playlistLoader.media();
+ segmentLoader.playlist(media, requestOptions); // if the video is already playing, or if this isn't a live video and preload
+ // permits, start downloading segments
+
+ if (!tech.paused() || media.endList && tech.preload() !== 'none') {
+ segmentLoader.load();
+ }
+ });
+ playlistLoader.on('loadedplaylist', () => {
+ segmentLoader.playlist(playlistLoader.media(), requestOptions); // If the player isn't paused, ensure that the segment loader is running
+
+ if (!tech.paused()) {
+ segmentLoader.load();
+ }
+ });
+ playlistLoader.on('error', onError[type](type, settings));
+ },
+ /**
+ * Setup event listeners for subtitle playlist loader
+ *
+ * @param {string} type
+ * MediaGroup type
+ * @param {PlaylistLoader|null} playlistLoader
+ * PlaylistLoader to register listeners on
+ * @param {Object} settings
+ * Object containing required information for media groups
+ * @function setupListeners.SUBTITLES
+ */
+ SUBTITLES: (type, playlistLoader, settings) => {
+ const {
+ tech,
+ requestOptions,
+ segmentLoaders: {
+ [type]: segmentLoader
+ },
+ mediaTypes: {
+ [type]: mediaType
+ }
+ } = settings;
+ playlistLoader.on('loadedmetadata', () => {
+ const media = playlistLoader.media();
+ segmentLoader.playlist(media, requestOptions);
+ segmentLoader.track(mediaType.activeTrack()); // if the video is already playing, or if this isn't a live video and preload
+ // permits, start downloading segments
+
+ if (!tech.paused() || media.endList && tech.preload() !== 'none') {
+ segmentLoader.load();
+ }
+ });
+ playlistLoader.on('loadedplaylist', () => {
+ segmentLoader.playlist(playlistLoader.media(), requestOptions); // If the player isn't paused, ensure that the segment loader is running
+
+ if (!tech.paused()) {
+ segmentLoader.load();
+ }
+ });
+ playlistLoader.on('error', onError[type](type, settings));
+ }
+ };
+ const initialize = {
+ /**
+ * Setup PlaylistLoaders and AudioTracks for the audio groups
+ *
+ * @param {string} type
+ * MediaGroup type
+ * @param {Object} settings
+ * Object containing required information for media groups
+ * @function initialize.AUDIO
+ */
+ 'AUDIO': (type, settings) => {
+ const {
+ vhs,
+ sourceType,
+ segmentLoaders: {
+ [type]: segmentLoader
+ },
+ requestOptions,
+ main: {
+ mediaGroups
+ },
+ mediaTypes: {
+ [type]: {
+ groups,
+ tracks,
+ logger_
+ }
+ },
+ mainPlaylistLoader
+ } = settings;
+ const audioOnlyMain = isAudioOnly(mainPlaylistLoader.main); // force a default if we have none
+
+ if (!mediaGroups[type] || Object.keys(mediaGroups[type]).length === 0) {
+ mediaGroups[type] = {
+ main: {
+ default: {
+ default: true
+ }
+ }
+ };
+ if (audioOnlyMain) {
+ mediaGroups[type].main.default.playlists = mainPlaylistLoader.main.playlists;
+ }
+ }
+ for (const groupId in mediaGroups[type]) {
+ if (!groups[groupId]) {
+ groups[groupId] = [];
+ }
+ for (const variantLabel in mediaGroups[type][groupId]) {
+ let properties = mediaGroups[type][groupId][variantLabel];
+ let playlistLoader;
+ if (audioOnlyMain) {
+ logger_(`AUDIO group '${groupId}' label '${variantLabel}' is a main playlist`);
+ properties.isMainPlaylist = true;
+ playlistLoader = null; // if vhs-json was provided as the source, and the media playlist was resolved,
+ // use the resolved media playlist object
+ } else if (sourceType === 'vhs-json' && properties.playlists) {
+ playlistLoader = new PlaylistLoader(properties.playlists[0], vhs, requestOptions);
+ } else if (properties.resolvedUri) {
+ playlistLoader = new PlaylistLoader(properties.resolvedUri, vhs, requestOptions); // TODO: dash isn't the only type with properties.playlists
+ // should we even have properties.playlists in this check.
+ } else if (properties.playlists && sourceType === 'dash') {
+ playlistLoader = new DashPlaylistLoader(properties.playlists[0], vhs, requestOptions, mainPlaylistLoader);
+ } else {
+ // no resolvedUri means the audio is muxed with the video when using this
+ // audio track
+ playlistLoader = null;
+ }
+ properties = merge({
+ id: variantLabel,
+ playlistLoader
+ }, properties);
+ setupListeners[type](type, properties.playlistLoader, settings);
+ groups[groupId].push(properties);
+ if (typeof tracks[variantLabel] === 'undefined') {
+ const track = new videojs.AudioTrack({
+ id: variantLabel,
+ kind: audioTrackKind_(properties),
+ enabled: false,
+ language: properties.language,
+ default: properties.default,
+ label: variantLabel
+ });
+ tracks[variantLabel] = track;
+ }
+ }
+ } // setup single error event handler for the segment loader
+
+ segmentLoader.on('error', onError[type](type, settings));
+ },
+ /**
+ * Setup PlaylistLoaders and TextTracks for the subtitle groups
+ *
+ * @param {string} type
+ * MediaGroup type
+ * @param {Object} settings
+ * Object containing required information for media groups
+ * @function initialize.SUBTITLES
+ */
+ 'SUBTITLES': (type, settings) => {
+ const {
+ tech,
+ vhs,
+ sourceType,
+ segmentLoaders: {
+ [type]: segmentLoader
+ },
+ requestOptions,
+ main: {
+ mediaGroups
+ },
+ mediaTypes: {
+ [type]: {
+ groups,
+ tracks
+ }
+ },
+ mainPlaylistLoader
+ } = settings;
+ for (const groupId in mediaGroups[type]) {
+ if (!groups[groupId]) {
+ groups[groupId] = [];
+ }
+ for (const variantLabel in mediaGroups[type][groupId]) {
+ if (!vhs.options_.useForcedSubtitles && mediaGroups[type][groupId][variantLabel].forced) {
+ // Subtitle playlists with the forced attribute are not selectable in Safari.
+ // According to Apple's HLS Authoring Specification:
+ // If content has forced subtitles and regular subtitles in a given language,
+ // the regular subtitles track in that language MUST contain both the forced
+ // subtitles and the regular subtitles for that language.
+ // Because of this requirement and that Safari does not add forced subtitles,
+ // forced subtitles are skipped here to maintain consistent experience across
+ // all platforms
+ continue;
+ }
+ let properties = mediaGroups[type][groupId][variantLabel];
+ let playlistLoader;
+ if (sourceType === 'hls') {
+ playlistLoader = new PlaylistLoader(properties.resolvedUri, vhs, requestOptions);
+ } else if (sourceType === 'dash') {
+ const playlists = properties.playlists.filter(p => p.excludeUntil !== Infinity);
+ if (!playlists.length) {
+ return;
+ }
+ playlistLoader = new DashPlaylistLoader(properties.playlists[0], vhs, requestOptions, mainPlaylistLoader);
+ } else if (sourceType === 'vhs-json') {
+ playlistLoader = new PlaylistLoader(
+ // if the vhs-json object included the media playlist, use the media playlist
+ // as provided, otherwise use the resolved URI to load the playlist
+ properties.playlists ? properties.playlists[0] : properties.resolvedUri, vhs, requestOptions);
+ }
+ properties = merge({
+ id: variantLabel,
+ playlistLoader
+ }, properties);
+ setupListeners[type](type, properties.playlistLoader, settings);
+ groups[groupId].push(properties);
+ if (typeof tracks[variantLabel] === 'undefined') {
+ const track = tech.addRemoteTextTrack({
+ id: variantLabel,
+ kind: 'subtitles',
+ default: properties.default && properties.autoselect,
+ language: properties.language,
+ label: variantLabel
+ }, false).track;
+ tracks[variantLabel] = track;
+ }
+ }
+ } // setup single error event handler for the segment loader
+
+ segmentLoader.on('error', onError[type](type, settings));
+ },
+ /**
+ * Setup TextTracks for the closed-caption groups
+ *
+ * @param {String} type
+ * MediaGroup type
+ * @param {Object} settings
+ * Object containing required information for media groups
+ * @function initialize['CLOSED-CAPTIONS']
+ */
+ 'CLOSED-CAPTIONS': (type, settings) => {
+ const {
+ tech,
+ main: {
+ mediaGroups
+ },
+ mediaTypes: {
+ [type]: {
+ groups,
+ tracks
+ }
+ }
+ } = settings;
+ for (const groupId in mediaGroups[type]) {
+ if (!groups[groupId]) {
+ groups[groupId] = [];
+ }
+ for (const variantLabel in mediaGroups[type][groupId]) {
+ const properties = mediaGroups[type][groupId][variantLabel]; // Look for either 608 (CCn) or 708 (SERVICEn) caption services
+
+ if (!/^(?:CC|SERVICE)/.test(properties.instreamId)) {
+ continue;
+ }
+ const captionServices = tech.options_.vhs && tech.options_.vhs.captionServices || {};
+ let newProps = {
+ label: variantLabel,
+ language: properties.language,
+ instreamId: properties.instreamId,
+ default: properties.default && properties.autoselect
+ };
+ if (captionServices[newProps.instreamId]) {
+ newProps = merge(newProps, captionServices[newProps.instreamId]);
+ }
+ if (newProps.default === undefined) {
+ delete newProps.default;
+ } // No PlaylistLoader is required for Closed-Captions because the captions are
+ // embedded within the video stream
+
+ groups[groupId].push(merge({
+ id: variantLabel
+ }, properties));
+ if (typeof tracks[variantLabel] === 'undefined') {
+ const track = tech.addRemoteTextTrack({
+ id: newProps.instreamId,
+ kind: 'captions',
+ default: newProps.default,
+ language: newProps.language,
+ label: newProps.label
+ }, false).track;
+ tracks[variantLabel] = track;
+ }
+ }
+ }
+ }
+ };
+ const groupMatch = (list, media) => {
+ for (let i = 0; i < list.length; i++) {
+ if (playlistMatch(media, list[i])) {
+ return true;
+ }
+ if (list[i].playlists && groupMatch(list[i].playlists, media)) {
+ return true;
+ }
+ }
+ return false;
+ };
+ /**
+ * Returns a function used to get the active group of the provided type
+ *
+ * @param {string} type
+ * MediaGroup type
+ * @param {Object} settings
+ * Object containing required information for media groups
+ * @return {Function}
+ * Function that returns the active media group for the provided type. Takes an
+ * optional parameter {TextTrack} track. If no track is provided, a list of all
+ * variants in the group, otherwise the variant corresponding to the provided
+ * track is returned.
+ * @function activeGroup
+ */
+
+ const activeGroup = (type, settings) => track => {
+ const {
+ mainPlaylistLoader,
+ mediaTypes: {
+ [type]: {
+ groups
+ }
+ }
+ } = settings;
+ const media = mainPlaylistLoader.media();
+ if (!media) {
+ return null;
+ }
+ let variants = null; // set to variants to main media active group
+
+ if (media.attributes[type]) {
+ variants = groups[media.attributes[type]];
+ }
+ const groupKeys = Object.keys(groups);
+ if (!variants) {
+ // find the mainPlaylistLoader media
+ // that is in a media group if we are dealing
+ // with audio only
+ if (type === 'AUDIO' && groupKeys.length > 1 && isAudioOnly(settings.main)) {
+ for (let i = 0; i < groupKeys.length; i++) {
+ const groupPropertyList = groups[groupKeys[i]];
+ if (groupMatch(groupPropertyList, media)) {
+ variants = groupPropertyList;
+ break;
+ }
+ } // use the main group if it exists
+ } else if (groups.main) {
+ variants = groups.main; // only one group, use that one
+ } else if (groupKeys.length === 1) {
+ variants = groups[groupKeys[0]];
+ }
+ }
+ if (typeof track === 'undefined') {
+ return variants;
+ }
+ if (track === null || !variants) {
+ // An active track was specified so a corresponding group is expected. track === null
+ // means no track is currently active so there is no corresponding group
+ return null;
+ }
+ return variants.filter(props => props.id === track.id)[0] || null;
+ };
+ const activeTrack = {
+ /**
+ * Returns a function used to get the active track of type provided
+ *
+ * @param {string} type
+ * MediaGroup type
+ * @param {Object} settings
+ * Object containing required information for media groups
+ * @return {Function}
+ * Function that returns the active media track for the provided type. Returns
+ * null if no track is active
+ * @function activeTrack.AUDIO
+ */
+ AUDIO: (type, settings) => () => {
+ const {
+ mediaTypes: {
+ [type]: {
+ tracks
+ }
+ }
+ } = settings;
+ for (const id in tracks) {
+ if (tracks[id].enabled) {
+ return tracks[id];
+ }
+ }
+ return null;
+ },
+ /**
+ * Returns a function used to get the active track of type provided
+ *
+ * @param {string} type
+ * MediaGroup type
+ * @param {Object} settings
+ * Object containing required information for media groups
+ * @return {Function}
+ * Function that returns the active media track for the provided type. Returns
+ * null if no track is active
+ * @function activeTrack.SUBTITLES
+ */
+ SUBTITLES: (type, settings) => () => {
+ const {
+ mediaTypes: {
+ [type]: {
+ tracks
+ }
+ }
+ } = settings;
+ for (const id in tracks) {
+ if (tracks[id].mode === 'showing' || tracks[id].mode === 'hidden') {
+ return tracks[id];
+ }
+ }
+ return null;
+ }
+ };
+ const getActiveGroup = (type, {
+ mediaTypes
+ }) => () => {
+ const activeTrack_ = mediaTypes[type].activeTrack();
+ if (!activeTrack_) {
+ return null;
+ }
+ return mediaTypes[type].activeGroup(activeTrack_);
+ };
+ /**
+ * Setup PlaylistLoaders and Tracks for media groups (Audio, Subtitles,
+ * Closed-Captions) specified in the main manifest.
+ *
+ * @param {Object} settings
+ * Object containing required information for setting up the media groups
+ * @param {Tech} settings.tech
+ * The tech of the player
+ * @param {Object} settings.requestOptions
+ * XHR request options used by the segment loaders
+ * @param {PlaylistLoader} settings.mainPlaylistLoader
+ * PlaylistLoader for the main source
+ * @param {VhsHandler} settings.vhs
+ * VHS SourceHandler
+ * @param {Object} settings.main
+ * The parsed main manifest
+ * @param {Object} settings.mediaTypes
+ * Object to store the loaders, tracks, and utility methods for each media type
+ * @param {Function} settings.excludePlaylist
+ * Excludes the current rendition and forces a rendition switch.
+ * @function setupMediaGroups
+ */
+
+ const setupMediaGroups = settings => {
+ ['AUDIO', 'SUBTITLES', 'CLOSED-CAPTIONS'].forEach(type => {
+ initialize[type](type, settings);
+ });
+ const {
+ mediaTypes,
+ mainPlaylistLoader,
+ tech,
+ vhs,
+ segmentLoaders: {
+ ['AUDIO']: audioSegmentLoader,
+ main: mainSegmentLoader
+ }
+ } = settings; // setup active group and track getters and change event handlers
+
+ ['AUDIO', 'SUBTITLES'].forEach(type => {
+ mediaTypes[type].activeGroup = activeGroup(type, settings);
+ mediaTypes[type].activeTrack = activeTrack[type](type, settings);
+ mediaTypes[type].onGroupChanged = onGroupChanged(type, settings);
+ mediaTypes[type].onGroupChanging = onGroupChanging(type, settings);
+ mediaTypes[type].onTrackChanged = onTrackChanged(type, settings);
+ mediaTypes[type].getActiveGroup = getActiveGroup(type, settings);
+ }); // DO NOT enable the default subtitle or caption track.
+ // DO enable the default audio track
+
+ const audioGroup = mediaTypes.AUDIO.activeGroup();
+ if (audioGroup) {
+ const groupId = (audioGroup.filter(group => group.default)[0] || audioGroup[0]).id;
+ mediaTypes.AUDIO.tracks[groupId].enabled = true;
+ mediaTypes.AUDIO.onGroupChanged();
+ mediaTypes.AUDIO.onTrackChanged();
+ const activeAudioGroup = mediaTypes.AUDIO.getActiveGroup(); // a similar check for handling setAudio on each loader is run again each time the
+ // track is changed, but needs to be handled here since the track may not be considered
+ // changed on the first call to onTrackChanged
+
+ if (!activeAudioGroup.playlistLoader) {
+ // either audio is muxed with video or the stream is audio only
+ mainSegmentLoader.setAudio(true);
+ } else {
+ // audio is demuxed
+ mainSegmentLoader.setAudio(false);
+ audioSegmentLoader.setAudio(true);
+ }
+ }
+ mainPlaylistLoader.on('mediachange', () => {
+ ['AUDIO', 'SUBTITLES'].forEach(type => mediaTypes[type].onGroupChanged());
+ });
+ mainPlaylistLoader.on('mediachanging', () => {
+ ['AUDIO', 'SUBTITLES'].forEach(type => mediaTypes[type].onGroupChanging());
+ }); // custom audio track change event handler for usage event
+
+ const onAudioTrackChanged = () => {
+ mediaTypes.AUDIO.onTrackChanged();
+ tech.trigger({
+ type: 'usage',
+ name: 'vhs-audio-change'
+ });
+ };
+ tech.audioTracks().addEventListener('change', onAudioTrackChanged);
+ tech.remoteTextTracks().addEventListener('change', mediaTypes.SUBTITLES.onTrackChanged);
+ vhs.on('dispose', () => {
+ tech.audioTracks().removeEventListener('change', onAudioTrackChanged);
+ tech.remoteTextTracks().removeEventListener('change', mediaTypes.SUBTITLES.onTrackChanged);
+ }); // clear existing audio tracks and add the ones we just created
+
+ tech.clearTracks('audio');
+ for (const id in mediaTypes.AUDIO.tracks) {
+ tech.audioTracks().addTrack(mediaTypes.AUDIO.tracks[id]);
+ }
+ };
+ /**
+ * Creates skeleton object used to store the loaders, tracks, and utility methods for each
+ * media type
+ *
+ * @return {Object}
+ * Object to store the loaders, tracks, and utility methods for each media type
+ * @function createMediaTypes
+ */
+
+ const createMediaTypes = () => {
+ const mediaTypes = {};
+ ['AUDIO', 'SUBTITLES', 'CLOSED-CAPTIONS'].forEach(type => {
+ mediaTypes[type] = {
+ groups: {},
+ tracks: {},
+ activePlaylistLoader: null,
+ activeGroup: noop,
+ activeTrack: noop,
+ getActiveGroup: noop,
+ onGroupChanged: noop,
+ onTrackChanged: noop,
+ lastTrack_: null,
+ logger_: logger(`MediaGroups[${type}]`)
+ };
+ });
+ return mediaTypes;
+ };
+
+ /**
+ * A utility class for setting properties and maintaining the state of the content steering manifest.
+ *
+ * Content Steering manifest format:
+ * VERSION: number (required) currently only version 1 is supported.
+ * TTL: number in seconds (optional) until the next content steering manifest reload.
+ * RELOAD-URI: string (optional) uri to fetch the next content steering manifest.
+ * SERVICE-LOCATION-PRIORITY or PATHWAY-PRIORITY a non empty array of unique string values.
+ * PATHWAY-CLONES: array (optional) (HLS only) pathway clone objects to copy from other playlists.
+ */
+
+ class SteeringManifest {
+ constructor() {
+ this.priority_ = [];
+ this.pathwayClones_ = new Map();
+ }
+ set version(number) {
+ // Only version 1 is currently supported for both DASH and HLS.
+ if (number === 1) {
+ this.version_ = number;
+ }
+ }
+ set ttl(seconds) {
+ // TTL = time-to-live, default = 300 seconds.
+ this.ttl_ = seconds || 300;
+ }
+ set reloadUri(uri) {
+ if (uri) {
+ // reload URI can be relative to the previous reloadUri.
+ this.reloadUri_ = resolveUrl(this.reloadUri_, uri);
+ }
+ }
+ set priority(array) {
+ // priority must be non-empty and unique values.
+ if (array && array.length) {
+ this.priority_ = array;
+ }
+ }
+ set pathwayClones(array) {
+ // pathwayClones must be non-empty.
+ if (array && array.length) {
+ this.pathwayClones_ = new Map(array.map(clone => [clone.ID, clone]));
+ }
+ }
+ get version() {
+ return this.version_;
+ }
+ get ttl() {
+ return this.ttl_;
+ }
+ get reloadUri() {
+ return this.reloadUri_;
+ }
+ get priority() {
+ return this.priority_;
+ }
+ get pathwayClones() {
+ return this.pathwayClones_;
+ }
+ }
+ /**
+ * This class represents a content steering manifest and associated state. See both HLS and DASH specifications.
+ * HLS: https://developer.apple.com/streaming/HLSContentSteeringSpecification.pdf and
+ * https://datatracker.ietf.org/doc/draft-pantos-hls-rfc8216bis/ section 4.4.6.6.
+ * DASH: https://dashif.org/docs/DASH-IF-CTS-00XX-Content-Steering-Community-Review.pdf
+ *
+ * @param {function} xhr for making a network request from the browser.
+ * @param {function} bandwidth for fetching the current bandwidth from the main segment loader.
+ */
+
+ class ContentSteeringController extends videojs.EventTarget {
+ constructor(xhr, bandwidth) {
+ super();
+ this.currentPathway = null;
+ this.defaultPathway = null;
+ this.queryBeforeStart = false;
+ this.availablePathways_ = new Set();
+ this.steeringManifest = new SteeringManifest();
+ this.proxyServerUrl_ = null;
+ this.manifestType_ = null;
+ this.ttlTimeout_ = null;
+ this.request_ = null;
+ this.currentPathwayClones = new Map();
+ this.nextPathwayClones = new Map();
+ this.excludedSteeringManifestURLs = new Set();
+ this.logger_ = logger('Content Steering');
+ this.xhr_ = xhr;
+ this.getBandwidth_ = bandwidth;
+ }
+ /**
+ * Assigns the content steering tag properties to the steering controller
+ *
+ * @param {string} baseUrl the baseURL from the main manifest for resolving the steering manifest url
+ * @param {Object} steeringTag the content steering tag from the main manifest
+ */
+
+ assignTagProperties(baseUrl, steeringTag) {
+ this.manifestType_ = steeringTag.serverUri ? 'HLS' : 'DASH'; // serverUri is HLS serverURL is DASH
+
+ const steeringUri = steeringTag.serverUri || steeringTag.serverURL;
+ if (!steeringUri) {
+ this.logger_(`steering manifest URL is ${steeringUri}, cannot request steering manifest.`);
+ this.trigger('error');
+ return;
+ } // Content steering manifests can be encoded as a data URI. We can decode, parse and return early if that's the case.
+
+ if (steeringUri.startsWith('data:')) {
+ this.decodeDataUriManifest_(steeringUri.substring(steeringUri.indexOf(',') + 1));
+ return;
+ } // reloadUri is the resolution of the main manifest URL and steering URL.
+
+ this.steeringManifest.reloadUri = resolveUrl(baseUrl, steeringUri); // pathwayId is HLS defaultServiceLocation is DASH
+
+ this.defaultPathway = steeringTag.pathwayId || steeringTag.defaultServiceLocation; // currently only DASH supports the following properties on <ContentSteering> tags.
+
+ this.queryBeforeStart = steeringTag.queryBeforeStart;
+ this.proxyServerUrl_ = steeringTag.proxyServerURL; // trigger a steering event if we have a pathway from the content steering tag.
+ // this tells VHS which segment pathway to start with.
+ // If queryBeforeStart is true we need to wait for the steering manifest response.
+
+ if (this.defaultPathway && !this.queryBeforeStart) {
+ this.trigger('content-steering');
+ }
+ }
+ /**
+ * Requests the content steering manifest and parse the response. This should only be called after
+ * assignTagProperties was called with a content steering tag.
+ *
+ * @param {string} initialUri The optional uri to make the request with.
+ * If set, the request should be made with exactly what is passed in this variable.
+ * This scenario should only happen once on initalization.
+ */
+
+ requestSteeringManifest(initial) {
+ const reloadUri = this.steeringManifest.reloadUri;
+ if (!reloadUri) {
+ return;
+ } // We currently don't support passing MPD query parameters directly to the content steering URL as this requires
+ // ExtUrlQueryInfo tag support. See the DASH content steering spec section 8.1.
+ // This request URI accounts for manifest URIs that have been excluded.
+
+ const uri = initial ? reloadUri : this.getRequestURI(reloadUri); // If there are no valid manifest URIs, we should stop content steering.
+
+ if (!uri) {
+ this.logger_('No valid content steering manifest URIs. Stopping content steering.');
+ this.trigger('error');
+ this.dispose();
+ return;
+ }
+ this.request_ = this.xhr_({
+ uri,
+ requestType: 'content-steering-manifest'
+ }, (error, errorInfo) => {
+ if (error) {
+ // If the client receives HTTP 410 Gone in response to a manifest request,
+ // it MUST NOT issue another request for that URI for the remainder of the
+ // playback session. It MAY continue to use the most-recently obtained set
+ // of Pathways.
+ if (errorInfo.status === 410) {
+ this.logger_(`manifest request 410 ${error}.`);
+ this.logger_(`There will be no more content steering requests to ${uri} this session.`);
+ this.excludedSteeringManifestURLs.add(uri);
+ return;
+ } // If the client receives HTTP 429 Too Many Requests with a Retry-After
+ // header in response to a manifest request, it SHOULD wait until the time
+ // specified by the Retry-After header to reissue the request.
+
+ if (errorInfo.status === 429) {
+ const retrySeconds = errorInfo.responseHeaders['retry-after'];
+ this.logger_(`manifest request 429 ${error}.`);
+ this.logger_(`content steering will retry in ${retrySeconds} seconds.`);
+ this.startTTLTimeout_(parseInt(retrySeconds, 10));
+ return;
+ } // If the Steering Manifest cannot be loaded and parsed correctly, the
+ // client SHOULD continue to use the previous values and attempt to reload
+ // it after waiting for the previously-specified TTL (or 5 minutes if
+ // none).
+
+ this.logger_(`manifest failed to load ${error}.`);
+ this.startTTLTimeout_();
+ return;
+ }
+ const steeringManifestJson = JSON.parse(this.request_.responseText);
+ this.assignSteeringProperties_(steeringManifestJson);
+ this.startTTLTimeout_();
+ });
+ }
+ /**
+ * Set the proxy server URL and add the steering manifest url as a URI encoded parameter.
+ *
+ * @param {string} steeringUrl the steering manifest url
+ * @return the steering manifest url to a proxy server with all parameters set
+ */
+
+ setProxyServerUrl_(steeringUrl) {
+ const steeringUrlObject = new window.URL(steeringUrl);
+ const proxyServerUrlObject = new window.URL(this.proxyServerUrl_);
+ proxyServerUrlObject.searchParams.set('url', encodeURI(steeringUrlObject.toString()));
+ return this.setSteeringParams_(proxyServerUrlObject.toString());
+ }
+ /**
+ * Decodes and parses the data uri encoded steering manifest
+ *
+ * @param {string} dataUri the data uri to be decoded and parsed.
+ */
+
+ decodeDataUriManifest_(dataUri) {
+ const steeringManifestJson = JSON.parse(window.atob(dataUri));
+ this.assignSteeringProperties_(steeringManifestJson);
+ }
+ /**
+ * Set the HLS or DASH content steering manifest request query parameters. For example:
+ * _HLS_pathway="<CURRENT-PATHWAY-ID>" and _HLS_throughput=<THROUGHPUT>
+ * _DASH_pathway and _DASH_throughput
+ *
+ * @param {string} uri to add content steering server parameters to.
+ * @return a new uri as a string with the added steering query parameters.
+ */
+
+ setSteeringParams_(url) {
+ const urlObject = new window.URL(url);
+ const path = this.getPathway();
+ const networkThroughput = this.getBandwidth_();
+ if (path) {
+ const pathwayKey = `_${this.manifestType_}_pathway`;
+ urlObject.searchParams.set(pathwayKey, path);
+ }
+ if (networkThroughput) {
+ const throughputKey = `_${this.manifestType_}_throughput`;
+ urlObject.searchParams.set(throughputKey, networkThroughput);
+ }
+ return urlObject.toString();
+ }
+ /**
+ * Assigns the current steering manifest properties and to the SteeringManifest object
+ *
+ * @param {Object} steeringJson the raw JSON steering manifest
+ */
+
+ assignSteeringProperties_(steeringJson) {
+ this.steeringManifest.version = steeringJson.VERSION;
+ if (!this.steeringManifest.version) {
+ this.logger_(`manifest version is ${steeringJson.VERSION}, which is not supported.`);
+ this.trigger('error');
+ return;
+ }
+ this.steeringManifest.ttl = steeringJson.TTL;
+ this.steeringManifest.reloadUri = steeringJson['RELOAD-URI']; // HLS = PATHWAY-PRIORITY required. DASH = SERVICE-LOCATION-PRIORITY optional
+
+ this.steeringManifest.priority = steeringJson['PATHWAY-PRIORITY'] || steeringJson['SERVICE-LOCATION-PRIORITY']; // Pathway clones to be created/updated in HLS.
+ // See section 7.2 https://datatracker.ietf.org/doc/draft-pantos-hls-rfc8216bis/
+
+ this.steeringManifest.pathwayClones = steeringJson['PATHWAY-CLONES'];
+ this.nextPathwayClones = this.steeringManifest.pathwayClones; // 1. apply first pathway from the array.
+ // 2. if first pathway doesn't exist in manifest, try next pathway.
+ // a. if all pathways are exhausted, ignore the steering manifest priority.
+ // 3. if segments fail from an established pathway, try all variants/renditions, then exclude the failed pathway.
+ // a. exclude a pathway for a minimum of the last TTL duration. Meaning, from the next steering response,
+ // the excluded pathway will be ignored.
+ // See excludePathway usage in excludePlaylist().
+ // If there are no available pathways, we need to stop content steering.
+
+ if (!this.availablePathways_.size) {
+ this.logger_('There are no available pathways for content steering. Ending content steering.');
+ this.trigger('error');
+ this.dispose();
+ }
+ const chooseNextPathway = pathwaysByPriority => {
+ for (const path of pathwaysByPriority) {
+ if (this.availablePathways_.has(path)) {
+ return path;
+ }
+ } // If no pathway matches, ignore the manifest and choose the first available.
+
+ return [...this.availablePathways_][0];
+ };
+ const nextPathway = chooseNextPathway(this.steeringManifest.priority);
+ if (this.currentPathway !== nextPathway) {
+ this.currentPathway = nextPathway;
+ this.trigger('content-steering');
+ }
+ }
+ /**
+ * Returns the pathway to use for steering decisions
+ *
+ * @return {string} returns the current pathway or the default
+ */
+
+ getPathway() {
+ return this.currentPathway || this.defaultPathway;
+ }
+ /**
+ * Chooses the manifest request URI based on proxy URIs and server URLs.
+ * Also accounts for exclusion on certain manifest URIs.
+ *
+ * @param {string} reloadUri the base uri before parameters
+ *
+ * @return {string} the final URI for the request to the manifest server.
+ */
+
+ getRequestURI(reloadUri) {
+ if (!reloadUri) {
+ return null;
+ }
+ const isExcluded = uri => this.excludedSteeringManifestURLs.has(uri);
+ if (this.proxyServerUrl_) {
+ const proxyURI = this.setProxyServerUrl_(reloadUri);
+ if (!isExcluded(proxyURI)) {
+ return proxyURI;
+ }
+ }
+ const steeringURI = this.setSteeringParams_(reloadUri);
+ if (!isExcluded(steeringURI)) {
+ return steeringURI;
+ } // Return nothing if all valid manifest URIs are excluded.
+
+ return null;
+ }
+ /**
+ * Start the timeout for re-requesting the steering manifest at the TTL interval.
+ *
+ * @param {number} ttl time in seconds of the timeout. Defaults to the
+ * ttl interval in the steering manifest
+ */
+
+ startTTLTimeout_(ttl = this.steeringManifest.ttl) {
+ // 300 (5 minutes) is the default value.
+ const ttlMS = ttl * 1000;
+ this.ttlTimeout_ = window.setTimeout(() => {
+ this.requestSteeringManifest();
+ }, ttlMS);
+ }
+ /**
+ * Clear the TTL timeout if necessary.
+ */
+
+ clearTTLTimeout_() {
+ window.clearTimeout(this.ttlTimeout_);
+ this.ttlTimeout_ = null;
+ }
+ /**
+ * aborts any current steering xhr and sets the current request object to null
+ */
+
+ abort() {
+ if (this.request_) {
+ this.request_.abort();
+ }
+ this.request_ = null;
+ }
+ /**
+ * aborts steering requests clears the ttl timeout and resets all properties.
+ */
+
+ dispose() {
+ this.off('content-steering');
+ this.off('error');
+ this.abort();
+ this.clearTTLTimeout_();
+ this.currentPathway = null;
+ this.defaultPathway = null;
+ this.queryBeforeStart = null;
+ this.proxyServerUrl_ = null;
+ this.manifestType_ = null;
+ this.ttlTimeout_ = null;
+ this.request_ = null;
+ this.excludedSteeringManifestURLs = new Set();
+ this.availablePathways_ = new Set();
+ this.steeringManifest = new SteeringManifest();
+ }
+ /**
+ * adds a pathway to the available pathways set
+ *
+ * @param {string} pathway the pathway string to add
+ */
+
+ addAvailablePathway(pathway) {
+ if (pathway) {
+ this.availablePathways_.add(pathway);
+ }
+ }
+ /**
+ * Clears all pathways from the available pathways set
+ */
+
+ clearAvailablePathways() {
+ this.availablePathways_.clear();
+ }
+ /**
+ * Removes a pathway from the available pathways set.
+ */
+
+ excludePathway(pathway) {
+ return this.availablePathways_.delete(pathway);
+ }
+ /**
+ * Checks the refreshed DASH manifest content steering tag for changes.
+ *
+ * @param {string} baseURL new steering tag on DASH manifest refresh
+ * @param {Object} newTag the new tag to check for changes
+ * @return a true or false whether the new tag has different values
+ */
+
+ didDASHTagChange(baseURL, newTag) {
+ return !newTag && this.steeringManifest.reloadUri || newTag && (resolveUrl(baseURL, newTag.serverURL) !== this.steeringManifest.reloadUri || newTag.defaultServiceLocation !== this.defaultPathway || newTag.queryBeforeStart !== this.queryBeforeStart || newTag.proxyServerURL !== this.proxyServerUrl_);
+ }
+ getAvailablePathways() {
+ return this.availablePathways_;
+ }
+ }
+
+ /**
+ * @file playlist-controller.js
+ */
+ const ABORT_EARLY_EXCLUSION_SECONDS = 10;
+ let Vhs$1; // SegmentLoader stats that need to have each loader's
+ // values summed to calculate the final value
+
+ const loaderStats = ['mediaRequests', 'mediaRequestsAborted', 'mediaRequestsTimedout', 'mediaRequestsErrored', 'mediaTransferDuration', 'mediaBytesTransferred', 'mediaAppends'];
+ const sumLoaderStat = function (stat) {
+ return this.audioSegmentLoader_[stat] + this.mainSegmentLoader_[stat];
+ };
+ const shouldSwitchToMedia = function ({
+ currentPlaylist,
+ buffered,
+ currentTime,
+ nextPlaylist,
+ bufferLowWaterLine,
+ bufferHighWaterLine,
+ duration,
+ bufferBasedABR,
+ log
+ }) {
+ // we have no other playlist to switch to
+ if (!nextPlaylist) {
+ videojs.log.warn('We received no playlist to switch to. Please check your stream.');
+ return false;
+ }
+ const sharedLogLine = `allowing switch ${currentPlaylist && currentPlaylist.id || 'null'} -> ${nextPlaylist.id}`;
+ if (!currentPlaylist) {
+ log(`${sharedLogLine} as current playlist is not set`);
+ return true;
+ } // no need to switch if playlist is the same
+
+ if (nextPlaylist.id === currentPlaylist.id) {
+ return false;
+ } // determine if current time is in a buffered range.
+
+ const isBuffered = Boolean(findRange(buffered, currentTime).length); // If the playlist is live, then we want to not take low water line into account.
+ // This is because in LIVE, the player plays 3 segments from the end of the
+ // playlist, and if `BUFFER_LOW_WATER_LINE` is greater than the duration availble
+ // in those segments, a viewer will never experience a rendition upswitch.
+
+ if (!currentPlaylist.endList) {
+ // For LLHLS live streams, don't switch renditions before playback has started, as it almost
+ // doubles the time to first playback.
+ if (!isBuffered && typeof currentPlaylist.partTargetDuration === 'number') {
+ log(`not ${sharedLogLine} as current playlist is live llhls, but currentTime isn't in buffered.`);
+ return false;
+ }
+ log(`${sharedLogLine} as current playlist is live`);
+ return true;
+ }
+ const forwardBuffer = timeAheadOf(buffered, currentTime);
+ const maxBufferLowWaterLine = bufferBasedABR ? Config.EXPERIMENTAL_MAX_BUFFER_LOW_WATER_LINE : Config.MAX_BUFFER_LOW_WATER_LINE; // For the same reason as LIVE, we ignore the low water line when the VOD
+ // duration is below the max potential low water line
+
+ if (duration < maxBufferLowWaterLine) {
+ log(`${sharedLogLine} as duration < max low water line (${duration} < ${maxBufferLowWaterLine})`);
+ return true;
+ }
+ const nextBandwidth = nextPlaylist.attributes.BANDWIDTH;
+ const currBandwidth = currentPlaylist.attributes.BANDWIDTH; // when switching down, if our buffer is lower than the high water line,
+ // we can switch down
+
+ if (nextBandwidth < currBandwidth && (!bufferBasedABR || forwardBuffer < bufferHighWaterLine)) {
+ let logLine = `${sharedLogLine} as next bandwidth < current bandwidth (${nextBandwidth} < ${currBandwidth})`;
+ if (bufferBasedABR) {
+ logLine += ` and forwardBuffer < bufferHighWaterLine (${forwardBuffer} < ${bufferHighWaterLine})`;
+ }
+ log(logLine);
+ return true;
+ } // and if our buffer is higher than the low water line,
+ // we can switch up
+
+ if ((!bufferBasedABR || nextBandwidth > currBandwidth) && forwardBuffer >= bufferLowWaterLine) {
+ let logLine = `${sharedLogLine} as forwardBuffer >= bufferLowWaterLine (${forwardBuffer} >= ${bufferLowWaterLine})`;
+ if (bufferBasedABR) {
+ logLine += ` and next bandwidth > current bandwidth (${nextBandwidth} > ${currBandwidth})`;
+ }
+ log(logLine);
+ return true;
+ }
+ log(`not ${sharedLogLine} as no switching criteria met`);
+ return false;
+ };
+ /**
+ * the main playlist controller controller all interactons
+ * between playlists and segmentloaders. At this time this mainly
+ * involves a main playlist and a series of audio playlists
+ * if they are available
+ *
+ * @class PlaylistController
+ * @extends videojs.EventTarget
+ */
+
+ class PlaylistController extends videojs.EventTarget {
+ constructor(options) {
+ super();
+ const {
+ src,
+ withCredentials,
+ tech,
+ bandwidth,
+ externVhs,
+ useCueTags,
+ playlistExclusionDuration,
+ enableLowInitialPlaylist,
+ sourceType,
+ cacheEncryptionKeys,
+ bufferBasedABR,
+ leastPixelDiffSelector,
+ captionServices
+ } = options;
+ if (!src) {
+ throw new Error('A non-empty playlist URL or JSON manifest string is required');
+ }
+ let {
+ maxPlaylistRetries
+ } = options;
+ if (maxPlaylistRetries === null || typeof maxPlaylistRetries === 'undefined') {
+ maxPlaylistRetries = Infinity;
+ }
+ Vhs$1 = externVhs;
+ this.bufferBasedABR = Boolean(bufferBasedABR);
+ this.leastPixelDiffSelector = Boolean(leastPixelDiffSelector);
+ this.withCredentials = withCredentials;
+ this.tech_ = tech;
+ this.vhs_ = tech.vhs;
+ this.sourceType_ = sourceType;
+ this.useCueTags_ = useCueTags;
+ this.playlistExclusionDuration = playlistExclusionDuration;
+ this.maxPlaylistRetries = maxPlaylistRetries;
+ this.enableLowInitialPlaylist = enableLowInitialPlaylist;
+ if (this.useCueTags_) {
+ this.cueTagsTrack_ = this.tech_.addTextTrack('metadata', 'ad-cues');
+ this.cueTagsTrack_.inBandMetadataTrackDispatchType = '';
+ }
+ this.requestOptions_ = {
+ withCredentials,
+ maxPlaylistRetries,
+ timeout: null
+ };
+ this.on('error', this.pauseLoading);
+ this.mediaTypes_ = createMediaTypes();
+ this.mediaSource = new window.MediaSource();
+ this.handleDurationChange_ = this.handleDurationChange_.bind(this);
+ this.handleSourceOpen_ = this.handleSourceOpen_.bind(this);
+ this.handleSourceEnded_ = this.handleSourceEnded_.bind(this);
+ this.mediaSource.addEventListener('durationchange', this.handleDurationChange_); // load the media source into the player
+
+ this.mediaSource.addEventListener('sourceopen', this.handleSourceOpen_);
+ this.mediaSource.addEventListener('sourceended', this.handleSourceEnded_); // we don't have to handle sourceclose since dispose will handle termination of
+ // everything, and the MediaSource should not be detached without a proper disposal
+
+ this.seekable_ = createTimeRanges();
+ this.hasPlayed_ = false;
+ this.syncController_ = new SyncController(options);
+ this.segmentMetadataTrack_ = tech.addRemoteTextTrack({
+ kind: 'metadata',
+ label: 'segment-metadata'
+ }, false).track;
+ this.decrypter_ = new Decrypter();
+ this.sourceUpdater_ = new SourceUpdater(this.mediaSource);
+ this.inbandTextTracks_ = {};
+ this.timelineChangeController_ = new TimelineChangeController();
+ this.keyStatusMap_ = new Map();
+ const segmentLoaderSettings = {
+ vhs: this.vhs_,
+ parse708captions: options.parse708captions,
+ useDtsForTimestampOffset: options.useDtsForTimestampOffset,
+ captionServices,
+ mediaSource: this.mediaSource,
+ currentTime: this.tech_.currentTime.bind(this.tech_),
+ seekable: () => this.seekable(),
+ seeking: () => this.tech_.seeking(),
+ duration: () => this.duration(),
+ hasPlayed: () => this.hasPlayed_,
+ goalBufferLength: () => this.goalBufferLength(),
+ bandwidth,
+ syncController: this.syncController_,
+ decrypter: this.decrypter_,
+ sourceType: this.sourceType_,
+ inbandTextTracks: this.inbandTextTracks_,
+ cacheEncryptionKeys,
+ sourceUpdater: this.sourceUpdater_,
+ timelineChangeController: this.timelineChangeController_,
+ exactManifestTimings: options.exactManifestTimings,
+ addMetadataToTextTrack: this.addMetadataToTextTrack.bind(this)
+ }; // The source type check not only determines whether a special DASH playlist loader
+ // should be used, but also covers the case where the provided src is a vhs-json
+ // manifest object (instead of a URL). In the case of vhs-json, the default
+ // PlaylistLoader should be used.
+
+ this.mainPlaylistLoader_ = this.sourceType_ === 'dash' ? new DashPlaylistLoader(src, this.vhs_, merge(this.requestOptions_, {
+ addMetadataToTextTrack: this.addMetadataToTextTrack.bind(this)
+ })) : new PlaylistLoader(src, this.vhs_, merge(this.requestOptions_, {
+ addDateRangesToTextTrack: this.addDateRangesToTextTrack_.bind(this)
+ }));
+ this.setupMainPlaylistLoaderListeners_(); // setup segment loaders
+ // combined audio/video or just video when alternate audio track is selected
+
+ this.mainSegmentLoader_ = new SegmentLoader(merge(segmentLoaderSettings, {
+ segmentMetadataTrack: this.segmentMetadataTrack_,
+ loaderType: 'main'
+ }), options); // alternate audio track
+
+ this.audioSegmentLoader_ = new SegmentLoader(merge(segmentLoaderSettings, {
+ loaderType: 'audio'
+ }), options);
+ this.subtitleSegmentLoader_ = new VTTSegmentLoader(merge(segmentLoaderSettings, {
+ loaderType: 'vtt',
+ featuresNativeTextTracks: this.tech_.featuresNativeTextTracks,
+ loadVttJs: () => new Promise((resolve, reject) => {
+ function onLoad() {
+ tech.off('vttjserror', onError);
+ resolve();
+ }
+ function onError() {
+ tech.off('vttjsloaded', onLoad);
+ reject();
+ }
+ tech.one('vttjsloaded', onLoad);
+ tech.one('vttjserror', onError); // safe to call multiple times, script will be loaded only once:
+
+ tech.addWebVttScript_();
+ })
+ }), options);
+ const getBandwidth = () => {
+ return this.mainSegmentLoader_.bandwidth;
+ };
+ this.contentSteeringController_ = new ContentSteeringController(this.vhs_.xhr, getBandwidth);
+ this.setupSegmentLoaderListeners_();
+ if (this.bufferBasedABR) {
+ this.mainPlaylistLoader_.one('loadedplaylist', () => this.startABRTimer_());
+ this.tech_.on('pause', () => this.stopABRTimer_());
+ this.tech_.on('play', () => this.startABRTimer_());
+ } // Create SegmentLoader stat-getters
+ // mediaRequests_
+ // mediaRequestsAborted_
+ // mediaRequestsTimedout_
+ // mediaRequestsErrored_
+ // mediaTransferDuration_
+ // mediaBytesTransferred_
+ // mediaAppends_
+
+ loaderStats.forEach(stat => {
+ this[stat + '_'] = sumLoaderStat.bind(this, stat);
+ });
+ this.logger_ = logger('pc');
+ this.triggeredFmp4Usage = false;
+ if (this.tech_.preload() === 'none') {
+ this.loadOnPlay_ = () => {
+ this.loadOnPlay_ = null;
+ this.mainPlaylistLoader_.load();
+ };
+ this.tech_.one('play', this.loadOnPlay_);
+ } else {
+ this.mainPlaylistLoader_.load();
+ }
+ this.timeToLoadedData__ = -1;
+ this.mainAppendsToLoadedData__ = -1;
+ this.audioAppendsToLoadedData__ = -1;
+ const event = this.tech_.preload() === 'none' ? 'play' : 'loadstart'; // start the first frame timer on loadstart or play (for preload none)
+
+ this.tech_.one(event, () => {
+ const timeToLoadedDataStart = Date.now();
+ this.tech_.one('loadeddata', () => {
+ this.timeToLoadedData__ = Date.now() - timeToLoadedDataStart;
+ this.mainAppendsToLoadedData__ = this.mainSegmentLoader_.mediaAppends;
+ this.audioAppendsToLoadedData__ = this.audioSegmentLoader_.mediaAppends;
+ });
+ });
+ }
+ mainAppendsToLoadedData_() {
+ return this.mainAppendsToLoadedData__;
+ }
+ audioAppendsToLoadedData_() {
+ return this.audioAppendsToLoadedData__;
+ }
+ appendsToLoadedData_() {
+ const main = this.mainAppendsToLoadedData_();
+ const audio = this.audioAppendsToLoadedData_();
+ if (main === -1 || audio === -1) {
+ return -1;
+ }
+ return main + audio;
+ }
+ timeToLoadedData_() {
+ return this.timeToLoadedData__;
+ }
+ /**
+ * Run selectPlaylist and switch to the new playlist if we should
+ *
+ * @param {string} [reason=abr] a reason for why the ABR check is made
+ * @private
+ */
+
+ checkABR_(reason = 'abr') {
+ const nextPlaylist = this.selectPlaylist();
+ if (nextPlaylist && this.shouldSwitchToMedia_(nextPlaylist)) {
+ this.switchMedia_(nextPlaylist, reason);
+ }
+ }
+ switchMedia_(playlist, cause, delay) {
+ const oldMedia = this.media();
+ const oldId = oldMedia && (oldMedia.id || oldMedia.uri);
+ const newId = playlist && (playlist.id || playlist.uri);
+ if (oldId && oldId !== newId) {
+ this.logger_(`switch media ${oldId} -> ${newId} from ${cause}`);
+ this.tech_.trigger({
+ type: 'usage',
+ name: `vhs-rendition-change-${cause}`
+ });
+ }
+ this.mainPlaylistLoader_.media(playlist, delay);
+ }
+ /**
+ * A function that ensures we switch our playlists inside of `mediaTypes`
+ * to match the current `serviceLocation` provided by the contentSteering controller.
+ * We want to check media types of `AUDIO`, `SUBTITLES`, and `CLOSED-CAPTIONS`.
+ *
+ * This should only be called on a DASH playback scenario while using content steering.
+ * This is necessary due to differences in how media in HLS manifests are generally tied to
+ * a video playlist, where in DASH that is not always the case.
+ */
+
+ switchMediaForDASHContentSteering_() {
+ ['AUDIO', 'SUBTITLES', 'CLOSED-CAPTIONS'].forEach(type => {
+ const mediaType = this.mediaTypes_[type];
+ const activeGroup = mediaType ? mediaType.activeGroup() : null;
+ const pathway = this.contentSteeringController_.getPathway();
+ if (activeGroup && pathway) {
+ // activeGroup can be an array or a single group
+ const mediaPlaylists = activeGroup.length ? activeGroup[0].playlists : activeGroup.playlists;
+ const dashMediaPlaylists = mediaPlaylists.filter(p => p.attributes.serviceLocation === pathway); // Switch the current active playlist to the correct CDN
+
+ if (dashMediaPlaylists.length) {
+ this.mediaTypes_[type].activePlaylistLoader.media(dashMediaPlaylists[0]);
+ }
+ }
+ });
+ }
+ /**
+ * Start a timer that periodically calls checkABR_
+ *
+ * @private
+ */
+
+ startABRTimer_() {
+ this.stopABRTimer_();
+ this.abrTimer_ = window.setInterval(() => this.checkABR_(), 250);
+ }
+ /**
+ * Stop the timer that periodically calls checkABR_
+ *
+ * @private
+ */
+
+ stopABRTimer_() {
+ // if we're scrubbing, we don't need to pause.
+ // This getter will be added to Video.js in version 7.11.
+ if (this.tech_.scrubbing && this.tech_.scrubbing()) {
+ return;
+ }
+ window.clearInterval(this.abrTimer_);
+ this.abrTimer_ = null;
+ }
+ /**
+ * Get a list of playlists for the currently selected audio playlist
+ *
+ * @return {Array} the array of audio playlists
+ */
+
+ getAudioTrackPlaylists_() {
+ const main = this.main();
+ const defaultPlaylists = main && main.playlists || []; // if we don't have any audio groups then we can only
+ // assume that the audio tracks are contained in main
+ // playlist array, use that or an empty array.
+
+ if (!main || !main.mediaGroups || !main.mediaGroups.AUDIO) {
+ return defaultPlaylists;
+ }
+ const AUDIO = main.mediaGroups.AUDIO;
+ const groupKeys = Object.keys(AUDIO);
+ let track; // get the current active track
+
+ if (Object.keys(this.mediaTypes_.AUDIO.groups).length) {
+ track = this.mediaTypes_.AUDIO.activeTrack(); // or get the default track from main if mediaTypes_ isn't setup yet
+ } else {
+ // default group is `main` or just the first group.
+ const defaultGroup = AUDIO.main || groupKeys.length && AUDIO[groupKeys[0]];
+ for (const label in defaultGroup) {
+ if (defaultGroup[label].default) {
+ track = {
+ label
+ };
+ break;
+ }
+ }
+ } // no active track no playlists.
+
+ if (!track) {
+ return defaultPlaylists;
+ }
+ const playlists = []; // get all of the playlists that are possible for the
+ // active track.
+
+ for (const group in AUDIO) {
+ if (AUDIO[group][track.label]) {
+ const properties = AUDIO[group][track.label];
+ if (properties.playlists && properties.playlists.length) {
+ playlists.push.apply(playlists, properties.playlists);
+ } else if (properties.uri) {
+ playlists.push(properties);
+ } else if (main.playlists.length) {
+ // if an audio group does not have a uri
+ // see if we have main playlists that use it as a group.
+ // if we do then add those to the playlists list.
+ for (let i = 0; i < main.playlists.length; i++) {
+ const playlist = main.playlists[i];
+ if (playlist.attributes && playlist.attributes.AUDIO && playlist.attributes.AUDIO === group) {
+ playlists.push(playlist);
+ }
+ }
+ }
+ }
+ }
+ if (!playlists.length) {
+ return defaultPlaylists;
+ }
+ return playlists;
+ }
+ /**
+ * Register event handlers on the main playlist loader. A helper
+ * function for construction time.
+ *
+ * @private
+ */
+
+ setupMainPlaylistLoaderListeners_() {
+ this.mainPlaylistLoader_.on('loadedmetadata', () => {
+ const media = this.mainPlaylistLoader_.media();
+ const requestTimeout = media.targetDuration * 1.5 * 1000; // If we don't have any more available playlists, we don't want to
+ // timeout the request.
+
+ if (isLowestEnabledRendition(this.mainPlaylistLoader_.main, this.mainPlaylistLoader_.media())) {
+ this.requestOptions_.timeout = 0;
+ } else {
+ this.requestOptions_.timeout = requestTimeout;
+ } // if this isn't a live video and preload permits, start
+ // downloading segments
+
+ if (media.endList && this.tech_.preload() !== 'none') {
+ this.mainSegmentLoader_.playlist(media, this.requestOptions_);
+ this.mainSegmentLoader_.load();
+ }
+ setupMediaGroups({
+ sourceType: this.sourceType_,
+ segmentLoaders: {
+ AUDIO: this.audioSegmentLoader_,
+ SUBTITLES: this.subtitleSegmentLoader_,
+ main: this.mainSegmentLoader_
+ },
+ tech: this.tech_,
+ requestOptions: this.requestOptions_,
+ mainPlaylistLoader: this.mainPlaylistLoader_,
+ vhs: this.vhs_,
+ main: this.main(),
+ mediaTypes: this.mediaTypes_,
+ excludePlaylist: this.excludePlaylist.bind(this)
+ });
+ this.triggerPresenceUsage_(this.main(), media);
+ this.setupFirstPlay();
+ if (!this.mediaTypes_.AUDIO.activePlaylistLoader || this.mediaTypes_.AUDIO.activePlaylistLoader.media()) {
+ this.trigger('selectedinitialmedia');
+ } else {
+ // We must wait for the active audio playlist loader to
+ // finish setting up before triggering this event so the
+ // representations API and EME setup is correct
+ this.mediaTypes_.AUDIO.activePlaylistLoader.one('loadedmetadata', () => {
+ this.trigger('selectedinitialmedia');
+ });
+ }
+ });
+ this.mainPlaylistLoader_.on('loadedplaylist', () => {
+ if (this.loadOnPlay_) {
+ this.tech_.off('play', this.loadOnPlay_);
+ }
+ let updatedPlaylist = this.mainPlaylistLoader_.media();
+ if (!updatedPlaylist) {
+ // Add content steering listeners on first load and init.
+ this.attachContentSteeringListeners_();
+ this.initContentSteeringController_(); // exclude any variants that are not supported by the browser before selecting
+ // an initial media as the playlist selectors do not consider browser support
+
+ this.excludeUnsupportedVariants_();
+ let selectedMedia;
+ if (this.enableLowInitialPlaylist) {
+ selectedMedia = this.selectInitialPlaylist();
+ }
+ if (!selectedMedia) {
+ selectedMedia = this.selectPlaylist();
+ }
+ if (!selectedMedia || !this.shouldSwitchToMedia_(selectedMedia)) {
+ return;
+ }
+ this.initialMedia_ = selectedMedia;
+ this.switchMedia_(this.initialMedia_, 'initial'); // Under the standard case where a source URL is provided, loadedplaylist will
+ // fire again since the playlist will be requested. In the case of vhs-json
+ // (where the manifest object is provided as the source), when the media
+ // playlist's `segments` list is already available, a media playlist won't be
+ // requested, and loadedplaylist won't fire again, so the playlist handler must be
+ // called on its own here.
+
+ const haveJsonSource = this.sourceType_ === 'vhs-json' && this.initialMedia_.segments;
+ if (!haveJsonSource) {
+ return;
+ }
+ updatedPlaylist = this.initialMedia_;
+ }
+ this.handleUpdatedMediaPlaylist(updatedPlaylist);
+ });
+ this.mainPlaylistLoader_.on('error', () => {
+ const error = this.mainPlaylistLoader_.error;
+ this.excludePlaylist({
+ playlistToExclude: error.playlist,
+ error
+ });
+ });
+ this.mainPlaylistLoader_.on('mediachanging', () => {
+ this.mainSegmentLoader_.abort();
+ this.mainSegmentLoader_.pause();
+ });
+ this.mainPlaylistLoader_.on('mediachange', () => {
+ const media = this.mainPlaylistLoader_.media();
+ const requestTimeout = media.targetDuration * 1.5 * 1000; // If we don't have any more available playlists, we don't want to
+ // timeout the request.
+
+ if (isLowestEnabledRendition(this.mainPlaylistLoader_.main, this.mainPlaylistLoader_.media())) {
+ this.requestOptions_.timeout = 0;
+ } else {
+ this.requestOptions_.timeout = requestTimeout;
+ }
+ if (this.sourceType_ === 'dash') {
+ // we don't want to re-request the same hls playlist right after it was changed
+ this.mainPlaylistLoader_.load();
+ } // TODO: Create a new event on the PlaylistLoader that signals
+ // that the segments have changed in some way and use that to
+ // update the SegmentLoader instead of doing it twice here and
+ // on `loadedplaylist`
+
+ this.mainSegmentLoader_.pause();
+ this.mainSegmentLoader_.playlist(media, this.requestOptions_);
+ if (this.waitingForFastQualityPlaylistReceived_) {
+ this.runFastQualitySwitch_();
+ } else {
+ this.mainSegmentLoader_.load();
+ }
+ this.tech_.trigger({
+ type: 'mediachange',
+ bubbles: true
+ });
+ });
+ this.mainPlaylistLoader_.on('playlistunchanged', () => {
+ const updatedPlaylist = this.mainPlaylistLoader_.media(); // ignore unchanged playlists that have already been
+ // excluded for not-changing. We likely just have a really slowly updating
+ // playlist.
+
+ if (updatedPlaylist.lastExcludeReason_ === 'playlist-unchanged') {
+ return;
+ }
+ const playlistOutdated = this.stuckAtPlaylistEnd_(updatedPlaylist);
+ if (playlistOutdated) {
+ // Playlist has stopped updating and we're stuck at its end. Try to
+ // exclude it and switch to another playlist in the hope that that
+ // one is updating (and give the player a chance to re-adjust to the
+ // safe live point).
+ this.excludePlaylist({
+ error: {
+ message: 'Playlist no longer updating.',
+ reason: 'playlist-unchanged'
+ }
+ }); // useful for monitoring QoS
+
+ this.tech_.trigger('playliststuck');
+ }
+ });
+ this.mainPlaylistLoader_.on('renditiondisabled', () => {
+ this.tech_.trigger({
+ type: 'usage',
+ name: 'vhs-rendition-disabled'
+ });
+ });
+ this.mainPlaylistLoader_.on('renditionenabled', () => {
+ this.tech_.trigger({
+ type: 'usage',
+ name: 'vhs-rendition-enabled'
+ });
+ });
+ }
+ /**
+ * Given an updated media playlist (whether it was loaded for the first time, or
+ * refreshed for live playlists), update any relevant properties and state to reflect
+ * changes in the media that should be accounted for (e.g., cues and duration).
+ *
+ * @param {Object} updatedPlaylist the updated media playlist object
+ *
+ * @private
+ */
+
+ handleUpdatedMediaPlaylist(updatedPlaylist) {
+ if (this.useCueTags_) {
+ this.updateAdCues_(updatedPlaylist);
+ } // TODO: Create a new event on the PlaylistLoader that signals
+ // that the segments have changed in some way and use that to
+ // update the SegmentLoader instead of doing it twice here and
+ // on `mediachange`
+
+ this.mainSegmentLoader_.pause();
+ this.mainSegmentLoader_.playlist(updatedPlaylist, this.requestOptions_);
+ if (this.waitingForFastQualityPlaylistReceived_) {
+ this.runFastQualitySwitch_();
+ }
+ this.updateDuration(!updatedPlaylist.endList); // If the player isn't paused, ensure that the segment loader is running,
+ // as it is possible that it was temporarily stopped while waiting for
+ // a playlist (e.g., in case the playlist errored and we re-requested it).
+
+ if (!this.tech_.paused()) {
+ this.mainSegmentLoader_.load();
+ if (this.audioSegmentLoader_) {
+ this.audioSegmentLoader_.load();
+ }
+ }
+ }
+ /**
+ * A helper function for triggerring presence usage events once per source
+ *
+ * @private
+ */
+
+ triggerPresenceUsage_(main, media) {
+ const mediaGroups = main.mediaGroups || {};
+ let defaultDemuxed = true;
+ const audioGroupKeys = Object.keys(mediaGroups.AUDIO);
+ for (const mediaGroup in mediaGroups.AUDIO) {
+ for (const label in mediaGroups.AUDIO[mediaGroup]) {
+ const properties = mediaGroups.AUDIO[mediaGroup][label];
+ if (!properties.uri) {
+ defaultDemuxed = false;
+ }
+ }
+ }
+ if (defaultDemuxed) {
+ this.tech_.trigger({
+ type: 'usage',
+ name: 'vhs-demuxed'
+ });
+ }
+ if (Object.keys(mediaGroups.SUBTITLES).length) {
+ this.tech_.trigger({
+ type: 'usage',
+ name: 'vhs-webvtt'
+ });
+ }
+ if (Vhs$1.Playlist.isAes(media)) {
+ this.tech_.trigger({
+ type: 'usage',
+ name: 'vhs-aes'
+ });
+ }
+ if (audioGroupKeys.length && Object.keys(mediaGroups.AUDIO[audioGroupKeys[0]]).length > 1) {
+ this.tech_.trigger({
+ type: 'usage',
+ name: 'vhs-alternate-audio'
+ });
+ }
+ if (this.useCueTags_) {
+ this.tech_.trigger({
+ type: 'usage',
+ name: 'vhs-playlist-cue-tags'
+ });
+ }
+ }
+ shouldSwitchToMedia_(nextPlaylist) {
+ const currentPlaylist = this.mainPlaylistLoader_.media() || this.mainPlaylistLoader_.pendingMedia_;
+ const currentTime = this.tech_.currentTime();
+ const bufferLowWaterLine = this.bufferLowWaterLine();
+ const bufferHighWaterLine = this.bufferHighWaterLine();
+ const buffered = this.tech_.buffered();
+ return shouldSwitchToMedia({
+ buffered,
+ currentTime,
+ currentPlaylist,
+ nextPlaylist,
+ bufferLowWaterLine,
+ bufferHighWaterLine,
+ duration: this.duration(),
+ bufferBasedABR: this.bufferBasedABR,
+ log: this.logger_
+ });
+ }
+ /**
+ * Register event handlers on the segment loaders. A helper function
+ * for construction time.
+ *
+ * @private
+ */
+
+ setupSegmentLoaderListeners_() {
+ this.mainSegmentLoader_.on('bandwidthupdate', () => {
+ // Whether or not buffer based ABR or another ABR is used, on a bandwidth change it's
+ // useful to check to see if a rendition switch should be made.
+ this.checkABR_('bandwidthupdate');
+ this.tech_.trigger('bandwidthupdate');
+ });
+ this.mainSegmentLoader_.on('timeout', () => {
+ if (this.bufferBasedABR) {
+ // If a rendition change is needed, then it would've be done on `bandwidthupdate`.
+ // Here the only consideration is that for buffer based ABR there's no guarantee
+ // of an immediate switch (since the bandwidth is averaged with a timeout
+ // bandwidth value of 1), so force a load on the segment loader to keep it going.
+ this.mainSegmentLoader_.load();
+ }
+ }); // `progress` events are not reliable enough of a bandwidth measure to trigger buffer
+ // based ABR.
+
+ if (!this.bufferBasedABR) {
+ this.mainSegmentLoader_.on('progress', () => {
+ this.trigger('progress');
+ });
+ }
+ this.mainSegmentLoader_.on('error', () => {
+ const error = this.mainSegmentLoader_.error();
+ this.excludePlaylist({
+ playlistToExclude: error.playlist,
+ error
+ });
+ });
+ this.mainSegmentLoader_.on('appenderror', () => {
+ this.error = this.mainSegmentLoader_.error_;
+ this.trigger('error');
+ });
+ this.mainSegmentLoader_.on('syncinfoupdate', () => {
+ this.onSyncInfoUpdate_();
+ });
+ this.mainSegmentLoader_.on('timestampoffset', () => {
+ this.tech_.trigger({
+ type: 'usage',
+ name: 'vhs-timestamp-offset'
+ });
+ });
+ this.audioSegmentLoader_.on('syncinfoupdate', () => {
+ this.onSyncInfoUpdate_();
+ });
+ this.audioSegmentLoader_.on('appenderror', () => {
+ this.error = this.audioSegmentLoader_.error_;
+ this.trigger('error');
+ });
+ this.mainSegmentLoader_.on('ended', () => {
+ this.logger_('main segment loader ended');
+ this.onEndOfStream();
+ });
+ this.mainSegmentLoader_.on('earlyabort', event => {
+ // never try to early abort with the new ABR algorithm
+ if (this.bufferBasedABR) {
+ return;
+ }
+ this.delegateLoaders_('all', ['abort']);
+ this.excludePlaylist({
+ error: {
+ message: 'Aborted early because there isn\'t enough bandwidth to complete ' + 'the request without rebuffering.'
+ },
+ playlistExclusionDuration: ABORT_EARLY_EXCLUSION_SECONDS
+ });
+ });
+ const updateCodecs = () => {
+ if (!this.sourceUpdater_.hasCreatedSourceBuffers()) {
+ return this.tryToCreateSourceBuffers_();
+ }
+ const codecs = this.getCodecsOrExclude_(); // no codecs means that the playlist was excluded
+
+ if (!codecs) {
+ return;
+ }
+ this.sourceUpdater_.addOrChangeSourceBuffers(codecs);
+ };
+ this.mainSegmentLoader_.on('trackinfo', updateCodecs);
+ this.audioSegmentLoader_.on('trackinfo', updateCodecs);
+ this.mainSegmentLoader_.on('fmp4', () => {
+ if (!this.triggeredFmp4Usage) {
+ this.tech_.trigger({
+ type: 'usage',
+ name: 'vhs-fmp4'
+ });
+ this.triggeredFmp4Usage = true;
+ }
+ });
+ this.audioSegmentLoader_.on('fmp4', () => {
+ if (!this.triggeredFmp4Usage) {
+ this.tech_.trigger({
+ type: 'usage',
+ name: 'vhs-fmp4'
+ });
+ this.triggeredFmp4Usage = true;
+ }
+ });
+ this.audioSegmentLoader_.on('ended', () => {
+ this.logger_('audioSegmentLoader ended');
+ this.onEndOfStream();
+ });
+ }
+ mediaSecondsLoaded_() {
+ return Math.max(this.audioSegmentLoader_.mediaSecondsLoaded + this.mainSegmentLoader_.mediaSecondsLoaded);
+ }
+ /**
+ * Call load on our SegmentLoaders
+ */
+
+ load() {
+ this.mainSegmentLoader_.load();
+ if (this.mediaTypes_.AUDIO.activePlaylistLoader) {
+ this.audioSegmentLoader_.load();
+ }
+ if (this.mediaTypes_.SUBTITLES.activePlaylistLoader) {
+ this.subtitleSegmentLoader_.load();
+ }
+ }
+ /**
+ * Re-tune playback quality level for the current player
+ * conditions. This method will perform destructive actions like removing
+ * already buffered content in order to readjust the currently active
+ * playlist quickly. This is good for manual quality changes
+ *
+ * @private
+ */
+
+ fastQualityChange_(media = this.selectPlaylist()) {
+ if (media && media === this.mainPlaylistLoader_.media()) {
+ this.logger_('skipping fastQualityChange because new media is same as old');
+ return;
+ }
+ this.switchMedia_(media, 'fast-quality'); // we would like to avoid race condition when we call fastQuality,
+ // reset everything and start loading segments from prev segments instead of new because new playlist is not received yet
+
+ this.waitingForFastQualityPlaylistReceived_ = true;
+ }
+ runFastQualitySwitch_() {
+ this.waitingForFastQualityPlaylistReceived_ = false; // Delete all buffered data to allow an immediate quality switch, then seek to give
+ // the browser a kick to remove any cached frames from the previous rendtion (.04 seconds
+ // ahead was roughly the minimum that will accomplish this across a variety of content
+ // in IE and Edge, but seeking in place is sufficient on all other browsers)
+ // Edge/IE bug: https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/14600375/
+ // Chrome bug: https://bugs.chromium.org/p/chromium/issues/detail?id=651904
+
+ this.mainSegmentLoader_.pause();
+ this.mainSegmentLoader_.resetEverything(() => {
+ this.tech_.setCurrentTime(this.tech_.currentTime());
+ }); // don't need to reset audio as it is reset when media changes
+ }
+ /**
+ * Begin playback.
+ */
+
+ play() {
+ if (this.setupFirstPlay()) {
+ return;
+ }
+ if (this.tech_.ended()) {
+ this.tech_.setCurrentTime(0);
+ }
+ if (this.hasPlayed_) {
+ this.load();
+ }
+ const seekable = this.tech_.seekable(); // if the viewer has paused and we fell out of the live window,
+ // seek forward to the live point
+
+ if (this.tech_.duration() === Infinity) {
+ if (this.tech_.currentTime() < seekable.start(0)) {
+ return this.tech_.setCurrentTime(seekable.end(seekable.length - 1));
+ }
+ }
+ }
+ /**
+ * Seek to the latest media position if this is a live video and the
+ * player and video are loaded and initialized.
+ */
+
+ setupFirstPlay() {
+ const media = this.mainPlaylistLoader_.media(); // Check that everything is ready to begin buffering for the first call to play
+ // If 1) there is no active media
+ // 2) the player is paused
+ // 3) the first play has already been setup
+ // then exit early
+
+ if (!media || this.tech_.paused() || this.hasPlayed_) {
+ return false;
+ } // when the video is a live stream and/or has a start time
+
+ if (!media.endList || media.start) {
+ const seekable = this.seekable();
+ if (!seekable.length) {
+ // without a seekable range, the player cannot seek to begin buffering at the
+ // live or start point
+ return false;
+ }
+ const seekableEnd = seekable.end(0);
+ let startPoint = seekableEnd;
+ if (media.start) {
+ const offset = media.start.timeOffset;
+ if (offset < 0) {
+ startPoint = Math.max(seekableEnd + offset, seekable.start(0));
+ } else {
+ startPoint = Math.min(seekableEnd, offset);
+ }
+ } // trigger firstplay to inform the source handler to ignore the next seek event
+
+ this.trigger('firstplay'); // seek to the live point
+
+ this.tech_.setCurrentTime(startPoint);
+ }
+ this.hasPlayed_ = true; // we can begin loading now that everything is ready
+
+ this.load();
+ return true;
+ }
+ /**
+ * handle the sourceopen event on the MediaSource
+ *
+ * @private
+ */
+
+ handleSourceOpen_() {
+ // Only attempt to create the source buffer if none already exist.
+ // handleSourceOpen is also called when we are "re-opening" a source buffer
+ // after `endOfStream` has been called (in response to a seek for instance)
+ this.tryToCreateSourceBuffers_(); // if autoplay is enabled, begin playback. This is duplicative of
+ // code in video.js but is required because play() must be invoked
+ // *after* the media source has opened.
+
+ if (this.tech_.autoplay()) {
+ const playPromise = this.tech_.play(); // Catch/silence error when a pause interrupts a play request
+ // on browsers which return a promise
+
+ if (typeof playPromise !== 'undefined' && typeof playPromise.then === 'function') {
+ playPromise.then(null, e => {});
+ }
+ }
+ this.trigger('sourceopen');
+ }
+ /**
+ * handle the sourceended event on the MediaSource
+ *
+ * @private
+ */
+
+ handleSourceEnded_() {
+ if (!this.inbandTextTracks_.metadataTrack_) {
+ return;
+ }
+ const cues = this.inbandTextTracks_.metadataTrack_.cues;
+ if (!cues || !cues.length) {
+ return;
+ }
+ const duration = this.duration();
+ cues[cues.length - 1].endTime = isNaN(duration) || Math.abs(duration) === Infinity ? Number.MAX_VALUE : duration;
+ }
+ /**
+ * handle the durationchange event on the MediaSource
+ *
+ * @private
+ */
+
+ handleDurationChange_() {
+ this.tech_.trigger('durationchange');
+ }
+ /**
+ * Calls endOfStream on the media source when all active stream types have called
+ * endOfStream
+ *
+ * @param {string} streamType
+ * Stream type of the segment loader that called endOfStream
+ * @private
+ */
+
+ onEndOfStream() {
+ let isEndOfStream = this.mainSegmentLoader_.ended_;
+ if (this.mediaTypes_.AUDIO.activePlaylistLoader) {
+ const mainMediaInfo = this.mainSegmentLoader_.getCurrentMediaInfo_(); // if the audio playlist loader exists, then alternate audio is active
+
+ if (!mainMediaInfo || mainMediaInfo.hasVideo) {
+ // if we do not know if the main segment loader contains video yet or if we
+ // definitively know the main segment loader contains video, then we need to wait
+ // for both main and audio segment loaders to call endOfStream
+ isEndOfStream = isEndOfStream && this.audioSegmentLoader_.ended_;
+ } else {
+ // otherwise just rely on the audio loader
+ isEndOfStream = this.audioSegmentLoader_.ended_;
+ }
+ }
+ if (!isEndOfStream) {
+ return;
+ }
+ this.stopABRTimer_();
+ this.sourceUpdater_.endOfStream();
+ }
+ /**
+ * Check if a playlist has stopped being updated
+ *
+ * @param {Object} playlist the media playlist object
+ * @return {boolean} whether the playlist has stopped being updated or not
+ */
+
+ stuckAtPlaylistEnd_(playlist) {
+ const seekable = this.seekable();
+ if (!seekable.length) {
+ // playlist doesn't have enough information to determine whether we are stuck
+ return false;
+ }
+ const expired = this.syncController_.getExpiredTime(playlist, this.duration());
+ if (expired === null) {
+ return false;
+ } // does not use the safe live end to calculate playlist end, since we
+ // don't want to say we are stuck while there is still content
+
+ const absolutePlaylistEnd = Vhs$1.Playlist.playlistEnd(playlist, expired);
+ const currentTime = this.tech_.currentTime();
+ const buffered = this.tech_.buffered();
+ if (!buffered.length) {
+ // return true if the playhead reached the absolute end of the playlist
+ return absolutePlaylistEnd - currentTime <= SAFE_TIME_DELTA;
+ }
+ const bufferedEnd = buffered.end(buffered.length - 1); // return true if there is too little buffer left and buffer has reached absolute
+ // end of playlist
+
+ return bufferedEnd - currentTime <= SAFE_TIME_DELTA && absolutePlaylistEnd - bufferedEnd <= SAFE_TIME_DELTA;
+ }
+ /**
+ * Exclude a playlist for a set amount of time, making it unavailable for selection by
+ * the rendition selection algorithm, then force a new playlist (rendition) selection.
+ *
+ * @param {Object=} playlistToExclude
+ * the playlist to exclude, defaults to the currently selected playlist
+ * @param {Object=} error
+ * an optional error
+ * @param {number=} playlistExclusionDuration
+ * an optional number of seconds to exclude the playlist
+ */
+
+ excludePlaylist({
+ playlistToExclude = this.mainPlaylistLoader_.media(),
+ error = {},
+ playlistExclusionDuration
+ }) {
+ // If the `error` was generated by the playlist loader, it will contain
+ // the playlist we were trying to load (but failed) and that should be
+ // excluded instead of the currently selected playlist which is likely
+ // out-of-date in this scenario
+ playlistToExclude = playlistToExclude || this.mainPlaylistLoader_.media();
+ playlistExclusionDuration = playlistExclusionDuration || error.playlistExclusionDuration || this.playlistExclusionDuration; // If there is no current playlist, then an error occurred while we were
+ // trying to load the main OR while we were disposing of the tech
+
+ if (!playlistToExclude) {
+ this.error = error;
+ if (this.mediaSource.readyState !== 'open') {
+ this.trigger('error');
+ } else {
+ this.sourceUpdater_.endOfStream('network');
+ }
+ return;
+ }
+ playlistToExclude.playlistErrors_++;
+ const playlists = this.mainPlaylistLoader_.main.playlists;
+ const enabledPlaylists = playlists.filter(isEnabled);
+ const isFinalRendition = enabledPlaylists.length === 1 && enabledPlaylists[0] === playlistToExclude; // Don't exclude the only playlist unless it was excluded
+ // forever
+
+ if (playlists.length === 1 && playlistExclusionDuration !== Infinity) {
+ videojs.log.warn(`Problem encountered with playlist ${playlistToExclude.id}. ` + 'Trying again since it is the only playlist.');
+ this.tech_.trigger('retryplaylist'); // if this is a final rendition, we should delay
+
+ return this.mainPlaylistLoader_.load(isFinalRendition);
+ }
+ if (isFinalRendition) {
+ // If we're content steering, try other pathways.
+ if (this.main().contentSteering) {
+ const pathway = this.pathwayAttribute_(playlistToExclude); // Ignore at least 1 steering manifest refresh.
+
+ const reIncludeDelay = this.contentSteeringController_.steeringManifest.ttl * 1000;
+ this.contentSteeringController_.excludePathway(pathway);
+ this.excludeThenChangePathway_();
+ setTimeout(() => {
+ this.contentSteeringController_.addAvailablePathway(pathway);
+ }, reIncludeDelay);
+ return;
+ } // Since we're on the final non-excluded playlist, and we're about to exclude
+ // it, instead of erring the player or retrying this playlist, clear out the current
+ // exclusion list. This allows other playlists to be attempted in case any have been
+ // fixed.
+
+ let reincluded = false;
+ playlists.forEach(playlist => {
+ // skip current playlist which is about to be excluded
+ if (playlist === playlistToExclude) {
+ return;
+ }
+ const excludeUntil = playlist.excludeUntil; // a playlist cannot be reincluded if it wasn't excluded to begin with.
+
+ if (typeof excludeUntil !== 'undefined' && excludeUntil !== Infinity) {
+ reincluded = true;
+ delete playlist.excludeUntil;
+ }
+ });
+ if (reincluded) {
+ videojs.log.warn('Removing other playlists from the exclusion list because the last ' + 'rendition is about to be excluded.'); // Technically we are retrying a playlist, in that we are simply retrying a previous
+ // playlist. This is needed for users relying on the retryplaylist event to catch a
+ // case where the player might be stuck and looping through "dead" playlists.
+
+ this.tech_.trigger('retryplaylist');
+ }
+ } // Exclude this playlist
+
+ let excludeUntil;
+ if (playlistToExclude.playlistErrors_ > this.maxPlaylistRetries) {
+ excludeUntil = Infinity;
+ } else {
+ excludeUntil = Date.now() + playlistExclusionDuration * 1000;
+ }
+ playlistToExclude.excludeUntil = excludeUntil;
+ if (error.reason) {
+ playlistToExclude.lastExcludeReason_ = error.reason;
+ }
+ this.tech_.trigger('excludeplaylist');
+ this.tech_.trigger({
+ type: 'usage',
+ name: 'vhs-rendition-excluded'
+ }); // TODO: only load a new playlist if we're excluding the current playlist
+ // If this function was called with a playlist that's not the current active playlist
+ // (e.g., media().id !== playlistToExclude.id),
+ // then a new playlist should not be selected and loaded, as there's nothing wrong with the current playlist.
+
+ const nextPlaylist = this.selectPlaylist();
+ if (!nextPlaylist) {
+ this.error = 'Playback cannot continue. No available working or supported playlists.';
+ this.trigger('error');
+ return;
+ }
+ const logFn = error.internal ? this.logger_ : videojs.log.warn;
+ const errorMessage = error.message ? ' ' + error.message : '';
+ logFn(`${error.internal ? 'Internal problem' : 'Problem'} encountered with playlist ${playlistToExclude.id}.` + `${errorMessage} Switching to playlist ${nextPlaylist.id}.`); // if audio group changed reset audio loaders
+
+ if (nextPlaylist.attributes.AUDIO !== playlistToExclude.attributes.AUDIO) {
+ this.delegateLoaders_('audio', ['abort', 'pause']);
+ } // if subtitle group changed reset subtitle loaders
+
+ if (nextPlaylist.attributes.SUBTITLES !== playlistToExclude.attributes.SUBTITLES) {
+ this.delegateLoaders_('subtitle', ['abort', 'pause']);
+ }
+ this.delegateLoaders_('main', ['abort', 'pause']);
+ const delayDuration = nextPlaylist.targetDuration / 2 * 1000 || 5 * 1000;
+ const shouldDelay = typeof nextPlaylist.lastRequest === 'number' && Date.now() - nextPlaylist.lastRequest <= delayDuration; // delay if it's a final rendition or if the last refresh is sooner than half targetDuration
+
+ return this.switchMedia_(nextPlaylist, 'exclude', isFinalRendition || shouldDelay);
+ }
+ /**
+ * Pause all segment/playlist loaders
+ */
+
+ pauseLoading() {
+ this.delegateLoaders_('all', ['abort', 'pause']);
+ this.stopABRTimer_();
+ }
+ /**
+ * Call a set of functions in order on playlist loaders, segment loaders,
+ * or both types of loaders.
+ *
+ * @param {string} filter
+ * Filter loaders that should call fnNames using a string. Can be:
+ * * all - run on all loaders
+ * * audio - run on all audio loaders
+ * * subtitle - run on all subtitle loaders
+ * * main - run on the main loaders
+ *
+ * @param {Array|string} fnNames
+ * A string or array of function names to call.
+ */
+
+ delegateLoaders_(filter, fnNames) {
+ const loaders = [];
+ const dontFilterPlaylist = filter === 'all';
+ if (dontFilterPlaylist || filter === 'main') {
+ loaders.push(this.mainPlaylistLoader_);
+ }
+ const mediaTypes = [];
+ if (dontFilterPlaylist || filter === 'audio') {
+ mediaTypes.push('AUDIO');
+ }
+ if (dontFilterPlaylist || filter === 'subtitle') {
+ mediaTypes.push('CLOSED-CAPTIONS');
+ mediaTypes.push('SUBTITLES');
+ }
+ mediaTypes.forEach(mediaType => {
+ const loader = this.mediaTypes_[mediaType] && this.mediaTypes_[mediaType].activePlaylistLoader;
+ if (loader) {
+ loaders.push(loader);
+ }
+ });
+ ['main', 'audio', 'subtitle'].forEach(name => {
+ const loader = this[`${name}SegmentLoader_`];
+ if (loader && (filter === name || filter === 'all')) {
+ loaders.push(loader);
+ }
+ });
+ loaders.forEach(loader => fnNames.forEach(fnName => {
+ if (typeof loader[fnName] === 'function') {
+ loader[fnName]();
+ }
+ }));
+ }
+ /**
+ * set the current time on all segment loaders
+ *
+ * @param {TimeRange} currentTime the current time to set
+ * @return {TimeRange} the current time
+ */
+
+ setCurrentTime(currentTime) {
+ const buffered = findRange(this.tech_.buffered(), currentTime);
+ if (!(this.mainPlaylistLoader_ && this.mainPlaylistLoader_.media())) {
+ // return immediately if the metadata is not ready yet
+ return 0;
+ } // it's clearly an edge-case but don't thrown an error if asked to
+ // seek within an empty playlist
+
+ if (!this.mainPlaylistLoader_.media().segments) {
+ return 0;
+ } // if the seek location is already buffered, continue buffering as usual
+
+ if (buffered && buffered.length) {
+ return currentTime;
+ } // cancel outstanding requests so we begin buffering at the new
+ // location
+
+ this.mainSegmentLoader_.pause();
+ this.mainSegmentLoader_.resetEverything();
+ if (this.mediaTypes_.AUDIO.activePlaylistLoader) {
+ this.audioSegmentLoader_.pause();
+ this.audioSegmentLoader_.resetEverything();
+ }
+ if (this.mediaTypes_.SUBTITLES.activePlaylistLoader) {
+ this.subtitleSegmentLoader_.pause();
+ this.subtitleSegmentLoader_.resetEverything();
+ } // start segment loader loading in case they are paused
+
+ this.load();
+ }
+ /**
+ * get the current duration
+ *
+ * @return {TimeRange} the duration
+ */
+
+ duration() {
+ if (!this.mainPlaylistLoader_) {
+ return 0;
+ }
+ const media = this.mainPlaylistLoader_.media();
+ if (!media) {
+ // no playlists loaded yet, so can't determine a duration
+ return 0;
+ } // Don't rely on the media source for duration in the case of a live playlist since
+ // setting the native MediaSource's duration to infinity ends up with consequences to
+ // seekable behavior. See https://github.com/w3c/media-source/issues/5 for details.
+ //
+ // This is resolved in the spec by https://github.com/w3c/media-source/pull/92,
+ // however, few browsers have support for setLiveSeekableRange()
+ // https://developer.mozilla.org/en-US/docs/Web/API/MediaSource/setLiveSeekableRange
+ //
+ // Until a time when the duration of the media source can be set to infinity, and a
+ // seekable range specified across browsers, just return Infinity.
+
+ if (!media.endList) {
+ return Infinity;
+ } // Since this is a VOD video, it is safe to rely on the media source's duration (if
+ // available). If it's not available, fall back to a playlist-calculated estimate.
+
+ if (this.mediaSource) {
+ return this.mediaSource.duration;
+ }
+ return Vhs$1.Playlist.duration(media);
+ }
+ /**
+ * check the seekable range
+ *
+ * @return {TimeRange} the seekable range
+ */
+
+ seekable() {
+ return this.seekable_;
+ }
+ onSyncInfoUpdate_() {
+ let audioSeekable; // TODO check for creation of both source buffers before updating seekable
+ //
+ // A fix was made to this function where a check for
+ // this.sourceUpdater_.hasCreatedSourceBuffers
+ // was added to ensure that both source buffers were created before seekable was
+ // updated. However, it originally had a bug where it was checking for a true and
+ // returning early instead of checking for false. Setting it to check for false to
+ // return early though created other issues. A call to play() would check for seekable
+ // end without verifying that a seekable range was present. In addition, even checking
+ // for that didn't solve some issues, as handleFirstPlay is sometimes worked around
+ // due to a media update calling load on the segment loaders, skipping a seek to live,
+ // thereby starting live streams at the beginning of the stream rather than at the end.
+ //
+ // This conditional should be fixed to wait for the creation of two source buffers at
+ // the same time as the other sections of code are fixed to properly seek to live and
+ // not throw an error due to checking for a seekable end when no seekable range exists.
+ //
+ // For now, fall back to the older behavior, with the understanding that the seekable
+ // range may not be completely correct, leading to a suboptimal initial live point.
+
+ if (!this.mainPlaylistLoader_) {
+ return;
+ }
+ let media = this.mainPlaylistLoader_.media();
+ if (!media) {
+ return;
+ }
+ let expired = this.syncController_.getExpiredTime(media, this.duration());
+ if (expired === null) {
+ // not enough information to update seekable
+ return;
+ }
+ const main = this.mainPlaylistLoader_.main;
+ const mainSeekable = Vhs$1.Playlist.seekable(media, expired, Vhs$1.Playlist.liveEdgeDelay(main, media));
+ if (mainSeekable.length === 0) {
+ return;
+ }
+ if (this.mediaTypes_.AUDIO.activePlaylistLoader) {
+ media = this.mediaTypes_.AUDIO.activePlaylistLoader.media();
+ expired = this.syncController_.getExpiredTime(media, this.duration());
+ if (expired === null) {
+ return;
+ }
+ audioSeekable = Vhs$1.Playlist.seekable(media, expired, Vhs$1.Playlist.liveEdgeDelay(main, media));
+ if (audioSeekable.length === 0) {
+ return;
+ }
+ }
+ let oldEnd;
+ let oldStart;
+ if (this.seekable_ && this.seekable_.length) {
+ oldEnd = this.seekable_.end(0);
+ oldStart = this.seekable_.start(0);
+ }
+ if (!audioSeekable) {
+ // seekable has been calculated based on buffering video data so it
+ // can be returned directly
+ this.seekable_ = mainSeekable;
+ } else if (audioSeekable.start(0) > mainSeekable.end(0) || mainSeekable.start(0) > audioSeekable.end(0)) {
+ // seekables are pretty far off, rely on main
+ this.seekable_ = mainSeekable;
+ } else {
+ this.seekable_ = createTimeRanges([[audioSeekable.start(0) > mainSeekable.start(0) ? audioSeekable.start(0) : mainSeekable.start(0), audioSeekable.end(0) < mainSeekable.end(0) ? audioSeekable.end(0) : mainSeekable.end(0)]]);
+ } // seekable is the same as last time
+
+ if (this.seekable_ && this.seekable_.length) {
+ if (this.seekable_.end(0) === oldEnd && this.seekable_.start(0) === oldStart) {
+ return;
+ }
+ }
+ this.logger_(`seekable updated [${printableRange(this.seekable_)}]`);
+ this.tech_.trigger('seekablechanged');
+ }
+ /**
+ * Update the player duration
+ */
+
+ updateDuration(isLive) {
+ if (this.updateDuration_) {
+ this.mediaSource.removeEventListener('sourceopen', this.updateDuration_);
+ this.updateDuration_ = null;
+ }
+ if (this.mediaSource.readyState !== 'open') {
+ this.updateDuration_ = this.updateDuration.bind(this, isLive);
+ this.mediaSource.addEventListener('sourceopen', this.updateDuration_);
+ return;
+ }
+ if (isLive) {
+ const seekable = this.seekable();
+ if (!seekable.length) {
+ return;
+ } // Even in the case of a live playlist, the native MediaSource's duration should not
+ // be set to Infinity (even though this would be expected for a live playlist), since
+ // setting the native MediaSource's duration to infinity ends up with consequences to
+ // seekable behavior. See https://github.com/w3c/media-source/issues/5 for details.
+ //
+ // This is resolved in the spec by https://github.com/w3c/media-source/pull/92,
+ // however, few browsers have support for setLiveSeekableRange()
+ // https://developer.mozilla.org/en-US/docs/Web/API/MediaSource/setLiveSeekableRange
+ //
+ // Until a time when the duration of the media source can be set to infinity, and a
+ // seekable range specified across browsers, the duration should be greater than or
+ // equal to the last possible seekable value.
+ // MediaSource duration starts as NaN
+ // It is possible (and probable) that this case will never be reached for many
+ // sources, since the MediaSource reports duration as the highest value without
+ // accounting for timestamp offset. For example, if the timestamp offset is -100 and
+ // we buffered times 0 to 100 with real times of 100 to 200, even though current
+ // time will be between 0 and 100, the native media source may report the duration
+ // as 200. However, since we report duration separate from the media source (as
+ // Infinity), and as long as the native media source duration value is greater than
+ // our reported seekable range, seeks will work as expected. The large number as
+ // duration for live is actually a strategy used by some players to work around the
+ // issue of live seekable ranges cited above.
+
+ if (isNaN(this.mediaSource.duration) || this.mediaSource.duration < seekable.end(seekable.length - 1)) {
+ this.sourceUpdater_.setDuration(seekable.end(seekable.length - 1));
+ }
+ return;
+ }
+ const buffered = this.tech_.buffered();
+ let duration = Vhs$1.Playlist.duration(this.mainPlaylistLoader_.media());
+ if (buffered.length > 0) {
+ duration = Math.max(duration, buffered.end(buffered.length - 1));
+ }
+ if (this.mediaSource.duration !== duration) {
+ this.sourceUpdater_.setDuration(duration);
+ }
+ }
+ /**
+ * dispose of the PlaylistController and everything
+ * that it controls
+ */
+
+ dispose() {
+ this.trigger('dispose');
+ this.decrypter_.terminate();
+ this.mainPlaylistLoader_.dispose();
+ this.mainSegmentLoader_.dispose();
+ this.contentSteeringController_.dispose();
+ this.keyStatusMap_.clear();
+ if (this.loadOnPlay_) {
+ this.tech_.off('play', this.loadOnPlay_);
+ }
+ ['AUDIO', 'SUBTITLES'].forEach(type => {
+ const groups = this.mediaTypes_[type].groups;
+ for (const id in groups) {
+ groups[id].forEach(group => {
+ if (group.playlistLoader) {
+ group.playlistLoader.dispose();
+ }
+ });
+ }
+ });
+ this.audioSegmentLoader_.dispose();
+ this.subtitleSegmentLoader_.dispose();
+ this.sourceUpdater_.dispose();
+ this.timelineChangeController_.dispose();
+ this.stopABRTimer_();
+ if (this.updateDuration_) {
+ this.mediaSource.removeEventListener('sourceopen', this.updateDuration_);
+ }
+ this.mediaSource.removeEventListener('durationchange', this.handleDurationChange_); // load the media source into the player
+
+ this.mediaSource.removeEventListener('sourceopen', this.handleSourceOpen_);
+ this.mediaSource.removeEventListener('sourceended', this.handleSourceEnded_);
+ this.off();
+ }
+ /**
+ * return the main playlist object if we have one
+ *
+ * @return {Object} the main playlist object that we parsed
+ */
+
+ main() {
+ return this.mainPlaylistLoader_.main;
+ }
+ /**
+ * return the currently selected playlist
+ *
+ * @return {Object} the currently selected playlist object that we parsed
+ */
+
+ media() {
+ // playlist loader will not return media if it has not been fully loaded
+ return this.mainPlaylistLoader_.media() || this.initialMedia_;
+ }
+ areMediaTypesKnown_() {
+ const usingAudioLoader = !!this.mediaTypes_.AUDIO.activePlaylistLoader;
+ const hasMainMediaInfo = !!this.mainSegmentLoader_.getCurrentMediaInfo_(); // if we are not using an audio loader, then we have audio media info
+ // otherwise check on the segment loader.
+
+ const hasAudioMediaInfo = !usingAudioLoader ? true : !!this.audioSegmentLoader_.getCurrentMediaInfo_(); // one or both loaders has not loaded sufficently to get codecs
+
+ if (!hasMainMediaInfo || !hasAudioMediaInfo) {
+ return false;
+ }
+ return true;
+ }
+ getCodecsOrExclude_() {
+ const media = {
+ main: this.mainSegmentLoader_.getCurrentMediaInfo_() || {},
+ audio: this.audioSegmentLoader_.getCurrentMediaInfo_() || {}
+ };
+ const playlist = this.mainSegmentLoader_.getPendingSegmentPlaylist() || this.media(); // set "main" media equal to video
+
+ media.video = media.main;
+ const playlistCodecs = codecsForPlaylist(this.main(), playlist);
+ const codecs = {};
+ const usingAudioLoader = !!this.mediaTypes_.AUDIO.activePlaylistLoader;
+ if (media.main.hasVideo) {
+ codecs.video = playlistCodecs.video || media.main.videoCodec || DEFAULT_VIDEO_CODEC;
+ }
+ if (media.main.isMuxed) {
+ codecs.video += `,${playlistCodecs.audio || media.main.audioCodec || DEFAULT_AUDIO_CODEC}`;
+ }
+ if (media.main.hasAudio && !media.main.isMuxed || media.audio.hasAudio || usingAudioLoader) {
+ codecs.audio = playlistCodecs.audio || media.main.audioCodec || media.audio.audioCodec || DEFAULT_AUDIO_CODEC; // set audio isFmp4 so we use the correct "supports" function below
+
+ media.audio.isFmp4 = media.main.hasAudio && !media.main.isMuxed ? media.main.isFmp4 : media.audio.isFmp4;
+ } // no codecs, no playback.
+
+ if (!codecs.audio && !codecs.video) {
+ this.excludePlaylist({
+ playlistToExclude: playlist,
+ error: {
+ message: 'Could not determine codecs for playlist.'
+ },
+ playlistExclusionDuration: Infinity
+ });
+ return;
+ } // fmp4 relies on browser support, while ts relies on muxer support
+
+ const supportFunction = (isFmp4, codec) => isFmp4 ? browserSupportsCodec(codec) : muxerSupportsCodec(codec);
+ const unsupportedCodecs = {};
+ let unsupportedAudio;
+ ['video', 'audio'].forEach(function (type) {
+ if (codecs.hasOwnProperty(type) && !supportFunction(media[type].isFmp4, codecs[type])) {
+ const supporter = media[type].isFmp4 ? 'browser' : 'muxer';
+ unsupportedCodecs[supporter] = unsupportedCodecs[supporter] || [];
+ unsupportedCodecs[supporter].push(codecs[type]);
+ if (type === 'audio') {
+ unsupportedAudio = supporter;
+ }
+ }
+ });
+ if (usingAudioLoader && unsupportedAudio && playlist.attributes.AUDIO) {
+ const audioGroup = playlist.attributes.AUDIO;
+ this.main().playlists.forEach(variant => {
+ const variantAudioGroup = variant.attributes && variant.attributes.AUDIO;
+ if (variantAudioGroup === audioGroup && variant !== playlist) {
+ variant.excludeUntil = Infinity;
+ }
+ });
+ this.logger_(`excluding audio group ${audioGroup} as ${unsupportedAudio} does not support codec(s): "${codecs.audio}"`);
+ } // if we have any unsupported codecs exclude this playlist.
+
+ if (Object.keys(unsupportedCodecs).length) {
+ const message = Object.keys(unsupportedCodecs).reduce((acc, supporter) => {
+ if (acc) {
+ acc += ', ';
+ }
+ acc += `${supporter} does not support codec(s): "${unsupportedCodecs[supporter].join(',')}"`;
+ return acc;
+ }, '') + '.';
+ this.excludePlaylist({
+ playlistToExclude: playlist,
+ error: {
+ internal: true,
+ message
+ },
+ playlistExclusionDuration: Infinity
+ });
+ return;
+ } // check if codec switching is happening
+
+ if (this.sourceUpdater_.hasCreatedSourceBuffers() && !this.sourceUpdater_.canChangeType()) {
+ const switchMessages = [];
+ ['video', 'audio'].forEach(type => {
+ const newCodec = (parseCodecs(this.sourceUpdater_.codecs[type] || '')[0] || {}).type;
+ const oldCodec = (parseCodecs(codecs[type] || '')[0] || {}).type;
+ if (newCodec && oldCodec && newCodec.toLowerCase() !== oldCodec.toLowerCase()) {
+ switchMessages.push(`"${this.sourceUpdater_.codecs[type]}" -> "${codecs[type]}"`);
+ }
+ });
+ if (switchMessages.length) {
+ this.excludePlaylist({
+ playlistToExclude: playlist,
+ error: {
+ message: `Codec switching not supported: ${switchMessages.join(', ')}.`,
+ internal: true
+ },
+ playlistExclusionDuration: Infinity
+ });
+ return;
+ }
+ } // TODO: when using the muxer shouldn't we just return
+ // the codecs that the muxer outputs?
+
+ return codecs;
+ }
+ /**
+ * Create source buffers and exlude any incompatible renditions.
+ *
+ * @private
+ */
+
+ tryToCreateSourceBuffers_() {
+ // media source is not ready yet or sourceBuffers are already
+ // created.
+ if (this.mediaSource.readyState !== 'open' || this.sourceUpdater_.hasCreatedSourceBuffers()) {
+ return;
+ }
+ if (!this.areMediaTypesKnown_()) {
+ return;
+ }
+ const codecs = this.getCodecsOrExclude_(); // no codecs means that the playlist was excluded
+
+ if (!codecs) {
+ return;
+ }
+ this.sourceUpdater_.createSourceBuffers(codecs);
+ const codecString = [codecs.video, codecs.audio].filter(Boolean).join(',');
+ this.excludeIncompatibleVariants_(codecString);
+ }
+ /**
+ * Excludes playlists with codecs that are unsupported by the muxer and browser.
+ */
+
+ excludeUnsupportedVariants_() {
+ const playlists = this.main().playlists;
+ const ids = []; // TODO: why don't we have a property to loop through all
+ // playlist? Why did we ever mix indexes and keys?
+
+ Object.keys(playlists).forEach(key => {
+ const variant = playlists[key]; // check if we already processed this playlist.
+
+ if (ids.indexOf(variant.id) !== -1) {
+ return;
+ }
+ ids.push(variant.id);
+ const codecs = codecsForPlaylist(this.main, variant);
+ const unsupported = [];
+ if (codecs.audio && !muxerSupportsCodec(codecs.audio) && !browserSupportsCodec(codecs.audio)) {
+ unsupported.push(`audio codec ${codecs.audio}`);
+ }
+ if (codecs.video && !muxerSupportsCodec(codecs.video) && !browserSupportsCodec(codecs.video)) {
+ unsupported.push(`video codec ${codecs.video}`);
+ }
+ if (codecs.text && codecs.text === 'stpp.ttml.im1t') {
+ unsupported.push(`text codec ${codecs.text}`);
+ }
+ if (unsupported.length) {
+ variant.excludeUntil = Infinity;
+ this.logger_(`excluding ${variant.id} for unsupported: ${unsupported.join(', ')}`);
+ }
+ });
+ }
+ /**
+ * Exclude playlists that are known to be codec or
+ * stream-incompatible with the SourceBuffer configuration. For
+ * instance, Media Source Extensions would cause the video element to
+ * stall waiting for video data if you switched from a variant with
+ * video and audio to an audio-only one.
+ *
+ * @param {Object} media a media playlist compatible with the current
+ * set of SourceBuffers. Variants in the current main playlist that
+ * do not appear to have compatible codec or stream configurations
+ * will be excluded from the default playlist selection algorithm
+ * indefinitely.
+ * @private
+ */
+
+ excludeIncompatibleVariants_(codecString) {
+ const ids = [];
+ const playlists = this.main().playlists;
+ const codecs = unwrapCodecList(parseCodecs(codecString));
+ const codecCount_ = codecCount(codecs);
+ const videoDetails = codecs.video && parseCodecs(codecs.video)[0] || null;
+ const audioDetails = codecs.audio && parseCodecs(codecs.audio)[0] || null;
+ Object.keys(playlists).forEach(key => {
+ const variant = playlists[key]; // check if we already processed this playlist.
+ // or it if it is already excluded forever.
+
+ if (ids.indexOf(variant.id) !== -1 || variant.excludeUntil === Infinity) {
+ return;
+ }
+ ids.push(variant.id);
+ const exclusionReasons = []; // get codecs from the playlist for this variant
+
+ const variantCodecs = codecsForPlaylist(this.mainPlaylistLoader_.main, variant);
+ const variantCodecCount = codecCount(variantCodecs); // if no codecs are listed, we cannot determine that this
+ // variant is incompatible. Wait for mux.js to probe
+
+ if (!variantCodecs.audio && !variantCodecs.video) {
+ return;
+ } // TODO: we can support this by removing the
+ // old media source and creating a new one, but it will take some work.
+ // The number of streams cannot change
+
+ if (variantCodecCount !== codecCount_) {
+ exclusionReasons.push(`codec count "${variantCodecCount}" !== "${codecCount_}"`);
+ } // only exclude playlists by codec change, if codecs cannot switch
+ // during playback.
+
+ if (!this.sourceUpdater_.canChangeType()) {
+ const variantVideoDetails = variantCodecs.video && parseCodecs(variantCodecs.video)[0] || null;
+ const variantAudioDetails = variantCodecs.audio && parseCodecs(variantCodecs.audio)[0] || null; // the video codec cannot change
+
+ if (variantVideoDetails && videoDetails && variantVideoDetails.type.toLowerCase() !== videoDetails.type.toLowerCase()) {
+ exclusionReasons.push(`video codec "${variantVideoDetails.type}" !== "${videoDetails.type}"`);
+ } // the audio codec cannot change
+
+ if (variantAudioDetails && audioDetails && variantAudioDetails.type.toLowerCase() !== audioDetails.type.toLowerCase()) {
+ exclusionReasons.push(`audio codec "${variantAudioDetails.type}" !== "${audioDetails.type}"`);
+ }
+ }
+ if (exclusionReasons.length) {
+ variant.excludeUntil = Infinity;
+ this.logger_(`excluding ${variant.id}: ${exclusionReasons.join(' && ')}`);
+ }
+ });
+ }
+ updateAdCues_(media) {
+ let offset = 0;
+ const seekable = this.seekable();
+ if (seekable.length) {
+ offset = seekable.start(0);
+ }
+ updateAdCues(media, this.cueTagsTrack_, offset);
+ }
+ /**
+ * Calculates the desired forward buffer length based on current time
+ *
+ * @return {number} Desired forward buffer length in seconds
+ */
+
+ goalBufferLength() {
+ const currentTime = this.tech_.currentTime();
+ const initial = Config.GOAL_BUFFER_LENGTH;
+ const rate = Config.GOAL_BUFFER_LENGTH_RATE;
+ const max = Math.max(initial, Config.MAX_GOAL_BUFFER_LENGTH);
+ return Math.min(initial + currentTime * rate, max);
+ }
+ /**
+ * Calculates the desired buffer low water line based on current time
+ *
+ * @return {number} Desired buffer low water line in seconds
+ */
+
+ bufferLowWaterLine() {
+ const currentTime = this.tech_.currentTime();
+ const initial = Config.BUFFER_LOW_WATER_LINE;
+ const rate = Config.BUFFER_LOW_WATER_LINE_RATE;
+ const max = Math.max(initial, Config.MAX_BUFFER_LOW_WATER_LINE);
+ const newMax = Math.max(initial, Config.EXPERIMENTAL_MAX_BUFFER_LOW_WATER_LINE);
+ return Math.min(initial + currentTime * rate, this.bufferBasedABR ? newMax : max);
+ }
+ bufferHighWaterLine() {
+ return Config.BUFFER_HIGH_WATER_LINE;
+ }
+ addDateRangesToTextTrack_(dateRanges) {
+ createMetadataTrackIfNotExists(this.inbandTextTracks_, 'com.apple.streaming', this.tech_);
+ addDateRangeMetadata({
+ inbandTextTracks: this.inbandTextTracks_,
+ dateRanges
+ });
+ }
+ addMetadataToTextTrack(dispatchType, metadataArray, videoDuration) {
+ const timestampOffset = this.sourceUpdater_.videoBuffer ? this.sourceUpdater_.videoTimestampOffset() : this.sourceUpdater_.audioTimestampOffset(); // There's potentially an issue where we could double add metadata if there's a muxed
+ // audio/video source with a metadata track, and an alt audio with a metadata track.
+ // However, this probably won't happen, and if it does it can be handled then.
+
+ createMetadataTrackIfNotExists(this.inbandTextTracks_, dispatchType, this.tech_);
+ addMetadata({
+ inbandTextTracks: this.inbandTextTracks_,
+ metadataArray,
+ timestampOffset,
+ videoDuration
+ });
+ }
+ /**
+ * Utility for getting the pathway or service location from an HLS or DASH playlist.
+ *
+ * @param {Object} playlist for getting pathway from.
+ * @return the pathway attribute of a playlist
+ */
+
+ pathwayAttribute_(playlist) {
+ return playlist.attributes['PATHWAY-ID'] || playlist.attributes.serviceLocation;
+ }
+ /**
+ * Initialize available pathways and apply the tag properties.
+ */
+
+ initContentSteeringController_() {
+ const main = this.main();
+ if (!main.contentSteering) {
+ return;
+ }
+ for (const playlist of main.playlists) {
+ this.contentSteeringController_.addAvailablePathway(this.pathwayAttribute_(playlist));
+ }
+ this.contentSteeringController_.assignTagProperties(main.uri, main.contentSteering); // request the steering manifest immediately if queryBeforeStart is set.
+
+ if (this.contentSteeringController_.queryBeforeStart) {
+ // When queryBeforeStart is true, initial request should omit steering parameters.
+ this.contentSteeringController_.requestSteeringManifest(true);
+ return;
+ } // otherwise start content steering after playback starts
+
+ this.tech_.one('canplay', () => {
+ this.contentSteeringController_.requestSteeringManifest();
+ });
+ }
+ /**
+ * Reset the content steering controller and re-init.
+ */
+
+ resetContentSteeringController_() {
+ this.contentSteeringController_.clearAvailablePathways();
+ this.contentSteeringController_.dispose();
+ this.initContentSteeringController_();
+ }
+ /**
+ * Attaches the listeners for content steering.
+ */
+
+ attachContentSteeringListeners_() {
+ this.contentSteeringController_.on('content-steering', this.excludeThenChangePathway_.bind(this));
+ if (this.sourceType_ === 'dash') {
+ this.mainPlaylistLoader_.on('loadedplaylist', () => {
+ const main = this.main(); // check if steering tag or pathways changed.
+
+ const didDashTagChange = this.contentSteeringController_.didDASHTagChange(main.uri, main.contentSteering);
+ const didPathwaysChange = () => {
+ const availablePathways = this.contentSteeringController_.getAvailablePathways();
+ const newPathways = [];
+ for (const playlist of main.playlists) {
+ const serviceLocation = playlist.attributes.serviceLocation;
+ if (serviceLocation) {
+ newPathways.push(serviceLocation);
+ if (!availablePathways.has(serviceLocation)) {
+ return true;
+ }
+ }
+ } // If we have no new serviceLocations and previously had availablePathways
+
+ if (!newPathways.length && availablePathways.size) {
+ return true;
+ }
+ return false;
+ };
+ if (didDashTagChange || didPathwaysChange()) {
+ this.resetContentSteeringController_();
+ }
+ });
+ }
+ }
+ /**
+ * Simple exclude and change playlist logic for content steering.
+ */
+
+ excludeThenChangePathway_() {
+ const currentPathway = this.contentSteeringController_.getPathway();
+ if (!currentPathway) {
+ return;
+ }
+ this.handlePathwayClones_();
+ const main = this.main();
+ const playlists = main.playlists;
+ const ids = new Set();
+ let didEnablePlaylists = false;
+ Object.keys(playlists).forEach(key => {
+ const variant = playlists[key];
+ const pathwayId = this.pathwayAttribute_(variant);
+ const differentPathwayId = pathwayId && currentPathway !== pathwayId;
+ const steeringExclusion = variant.excludeUntil === Infinity && variant.lastExcludeReason_ === 'content-steering';
+ if (steeringExclusion && !differentPathwayId) {
+ delete variant.excludeUntil;
+ delete variant.lastExcludeReason_;
+ didEnablePlaylists = true;
+ }
+ const noExcludeUntil = !variant.excludeUntil && variant.excludeUntil !== Infinity;
+ const shouldExclude = !ids.has(variant.id) && differentPathwayId && noExcludeUntil;
+ if (!shouldExclude) {
+ return;
+ }
+ ids.add(variant.id);
+ variant.excludeUntil = Infinity;
+ variant.lastExcludeReason_ = 'content-steering'; // TODO: kind of spammy, maybe move this.
+
+ this.logger_(`excluding ${variant.id} for ${variant.lastExcludeReason_}`);
+ });
+ if (this.contentSteeringController_.manifestType_ === 'DASH') {
+ Object.keys(this.mediaTypes_).forEach(key => {
+ const type = this.mediaTypes_[key];
+ if (type.activePlaylistLoader) {
+ const currentPlaylist = type.activePlaylistLoader.media_; // Check if the current media playlist matches the current CDN
+
+ if (currentPlaylist && currentPlaylist.attributes.serviceLocation !== currentPathway) {
+ didEnablePlaylists = true;
+ }
+ }
+ });
+ }
+ if (didEnablePlaylists) {
+ this.changeSegmentPathway_();
+ }
+ }
+ /**
+ * Add, update, or delete playlists and media groups for
+ * the pathway clones for HLS Content Steering.
+ *
+ * See https://datatracker.ietf.org/doc/draft-pantos-hls-rfc8216bis/
+ *
+ * NOTE: Pathway cloning does not currently support the `PER_VARIANT_URIS` and
+ * `PER_RENDITION_URIS` as we do not handle `STABLE-VARIANT-ID` or
+ * `STABLE-RENDITION-ID` values.
+ */
+
+ handlePathwayClones_() {
+ const main = this.main();
+ const playlists = main.playlists;
+ const currentPathwayClones = this.contentSteeringController_.currentPathwayClones;
+ const nextPathwayClones = this.contentSteeringController_.nextPathwayClones;
+ const hasClones = currentPathwayClones && currentPathwayClones.size || nextPathwayClones && nextPathwayClones.size;
+ if (!hasClones) {
+ return;
+ }
+ for (const [id, clone] of currentPathwayClones.entries()) {
+ const newClone = nextPathwayClones.get(id); // Delete the old pathway clone.
+
+ if (!newClone) {
+ this.mainPlaylistLoader_.updateOrDeleteClone(clone);
+ this.contentSteeringController_.excludePathway(id);
+ }
+ }
+ for (const [id, clone] of nextPathwayClones.entries()) {
+ const oldClone = currentPathwayClones.get(id); // Create a new pathway if it is a new pathway clone object.
+
+ if (!oldClone) {
+ const playlistsToClone = playlists.filter(p => {
+ return p.attributes['PATHWAY-ID'] === clone['BASE-ID'];
+ });
+ playlistsToClone.forEach(p => {
+ this.mainPlaylistLoader_.addClonePathway(clone, p);
+ });
+ this.contentSteeringController_.addAvailablePathway(id);
+ continue;
+ } // There have not been changes to the pathway clone object, so skip.
+
+ if (this.equalPathwayClones_(oldClone, clone)) {
+ continue;
+ } // Update a preexisting cloned pathway.
+ // True is set for the update flag.
+
+ this.mainPlaylistLoader_.updateOrDeleteClone(clone, true);
+ this.contentSteeringController_.addAvailablePathway(id);
+ } // Deep copy contents of next to current pathways.
+
+ this.contentSteeringController_.currentPathwayClones = new Map(JSON.parse(JSON.stringify([...nextPathwayClones])));
+ }
+ /**
+ * Determines whether two pathway clone objects are equivalent.
+ *
+ * @param {Object} a The first pathway clone object.
+ * @param {Object} b The second pathway clone object.
+ * @return {boolean} True if the pathway clone objects are equal, false otherwise.
+ */
+
+ equalPathwayClones_(a, b) {
+ if (a['BASE-ID'] !== b['BASE-ID'] || a.ID !== b.ID || a['URI-REPLACEMENT'].HOST !== b['URI-REPLACEMENT'].HOST) {
+ return false;
+ }
+ const aParams = a['URI-REPLACEMENT'].PARAMS;
+ const bParams = b['URI-REPLACEMENT'].PARAMS; // We need to iterate through both lists of params because one could be
+ // missing a parameter that the other has.
+
+ for (const p in aParams) {
+ if (aParams[p] !== bParams[p]) {
+ return false;
+ }
+ }
+ for (const p in bParams) {
+ if (aParams[p] !== bParams[p]) {
+ return false;
+ }
+ }
+ return true;
+ }
+ /**
+ * Changes the current playlists for audio, video and subtitles after a new pathway
+ * is chosen from content steering.
+ */
+
+ changeSegmentPathway_() {
+ const nextPlaylist = this.selectPlaylist();
+ this.pauseLoading(); // Switch audio and text track playlists if necessary in DASH
+
+ if (this.contentSteeringController_.manifestType_ === 'DASH') {
+ this.switchMediaForDASHContentSteering_();
+ }
+ this.switchMedia_(nextPlaylist, 'content-steering');
+ }
+ /**
+ * Iterates through playlists and check their keyId set and compare with the
+ * keyStatusMap, only enable playlists that have a usable key. If the playlist
+ * has no keyId leave it enabled by default.
+ */
+
+ excludeNonUsablePlaylistsByKeyId_() {
+ if (!this.mainPlaylistLoader_ || !this.mainPlaylistLoader_.main) {
+ return;
+ }
+ let nonUsableKeyStatusCount = 0;
+ const NON_USABLE = 'non-usable';
+ this.mainPlaylistLoader_.main.playlists.forEach(playlist => {
+ const keyIdSet = this.mainPlaylistLoader_.getKeyIdSet(playlist); // If the playlist doesn't have keyIDs lets not exclude it.
+
+ if (!keyIdSet || !keyIdSet.size) {
+ return;
+ }
+ keyIdSet.forEach(key => {
+ const USABLE = 'usable';
+ const hasUsableKeyStatus = this.keyStatusMap_.has(key) && this.keyStatusMap_.get(key) === USABLE;
+ const nonUsableExclusion = playlist.lastExcludeReason_ === NON_USABLE && playlist.excludeUntil === Infinity;
+ if (!hasUsableKeyStatus) {
+ // Only exclude playlists that haven't already been excluded as non-usable.
+ if (playlist.excludeUntil !== Infinity && playlist.lastExcludeReason_ !== NON_USABLE) {
+ playlist.excludeUntil = Infinity;
+ playlist.lastExcludeReason_ = NON_USABLE;
+ this.logger_(`excluding playlist ${playlist.id} because the key ID ${key} doesn't exist in the keyStatusMap or is not ${USABLE}`);
+ } // count all nonUsableKeyStatus
+
+ nonUsableKeyStatusCount++;
+ } else if (hasUsableKeyStatus && nonUsableExclusion) {
+ delete playlist.excludeUntil;
+ delete playlist.lastExcludeReason_;
+ this.logger_(`enabling playlist ${playlist.id} because key ID ${key} is ${USABLE}`);
+ }
+ });
+ }); // If for whatever reason every playlist has a non usable key status. Lets try re-including the SD renditions as a failsafe.
+
+ if (nonUsableKeyStatusCount >= this.mainPlaylistLoader_.main.playlists.length) {
+ this.mainPlaylistLoader_.main.playlists.forEach(playlist => {
+ const isNonHD = playlist && playlist.attributes && playlist.attributes.RESOLUTION && playlist.attributes.RESOLUTION.height < 720;
+ const excludedForNonUsableKey = playlist.excludeUntil === Infinity && playlist.lastExcludeReason_ === NON_USABLE;
+ if (isNonHD && excludedForNonUsableKey) {
+ // Only delete the excludeUntil so we don't try and re-exclude these playlists.
+ delete playlist.excludeUntil;
+ videojs.log.warn(`enabling non-HD playlist ${playlist.id} because all playlists were excluded due to ${NON_USABLE} key IDs`);
+ }
+ });
+ }
+ }
+ /**
+ * Adds a keystatus to the keystatus map, tries to convert to string if necessary.
+ *
+ * @param {any} keyId the keyId to add a status for
+ * @param {string} status the status of the keyId
+ */
+
+ addKeyStatus_(keyId, status) {
+ const isString = typeof keyId === 'string';
+ const keyIdHexString = isString ? keyId : bufferToHexString(keyId);
+ const formattedKeyIdString = keyIdHexString.slice(0, 32).toLowerCase();
+ this.logger_(`KeyStatus '${status}' with key ID ${formattedKeyIdString} added to the keyStatusMap`);
+ this.keyStatusMap_.set(formattedKeyIdString, status);
+ }
+ /**
+ * Utility function for adding key status to the keyStatusMap and filtering usable encrypted playlists.
+ *
+ * @param {any} keyId the keyId from the keystatuschange event
+ * @param {string} status the key status string
+ */
+
+ updatePlaylistByKeyStatus(keyId, status) {
+ this.addKeyStatus_(keyId, status);
+ if (!this.waitingForFastQualityPlaylistReceived_) {
+ this.excludeNonUsableThenChangePlaylist_();
+ } // Listen to loadedplaylist with a single listener and check for new contentProtection elements when a playlist is updated.
+
+ this.mainPlaylistLoader_.off('loadedplaylist', this.excludeNonUsableThenChangePlaylist_.bind(this));
+ this.mainPlaylistLoader_.on('loadedplaylist', this.excludeNonUsableThenChangePlaylist_.bind(this));
+ }
+ excludeNonUsableThenChangePlaylist_() {
+ this.excludeNonUsablePlaylistsByKeyId_();
+ this.fastQualityChange_();
+ }
+ }
+
+ /**
+ * Returns a function that acts as the Enable/disable playlist function.
+ *
+ * @param {PlaylistLoader} loader - The main playlist loader
+ * @param {string} playlistID - id of the playlist
+ * @param {Function} changePlaylistFn - A function to be called after a
+ * playlist's enabled-state has been changed. Will NOT be called if a
+ * playlist's enabled-state is unchanged
+ * @param {boolean=} enable - Value to set the playlist enabled-state to
+ * or if undefined returns the current enabled-state for the playlist
+ * @return {Function} Function for setting/getting enabled
+ */
+
+ const enableFunction = (loader, playlistID, changePlaylistFn) => enable => {
+ const playlist = loader.main.playlists[playlistID];
+ const incompatible = isIncompatible(playlist);
+ const currentlyEnabled = isEnabled(playlist);
+ if (typeof enable === 'undefined') {
+ return currentlyEnabled;
+ }
+ if (enable) {
+ delete playlist.disabled;
+ } else {
+ playlist.disabled = true;
+ }
+ if (enable !== currentlyEnabled && !incompatible) {
+ // Ensure the outside world knows about our changes
+ changePlaylistFn(playlist);
+ if (enable) {
+ loader.trigger('renditionenabled');
+ } else {
+ loader.trigger('renditiondisabled');
+ }
+ }
+ return enable;
+ };
+ /**
+ * The representation object encapsulates the publicly visible information
+ * in a media playlist along with a setter/getter-type function (enabled)
+ * for changing the enabled-state of a particular playlist entry
+ *
+ * @class Representation
+ */
+
+ class Representation {
+ constructor(vhsHandler, playlist, id) {
+ const {
+ playlistController_: pc
+ } = vhsHandler;
+ const qualityChangeFunction = pc.fastQualityChange_.bind(pc); // some playlist attributes are optional
+
+ if (playlist.attributes) {
+ const resolution = playlist.attributes.RESOLUTION;
+ this.width = resolution && resolution.width;
+ this.height = resolution && resolution.height;
+ this.bandwidth = playlist.attributes.BANDWIDTH;
+ this.frameRate = playlist.attributes['FRAME-RATE'];
+ }
+ this.codecs = codecsForPlaylist(pc.main(), playlist);
+ this.playlist = playlist; // The id is simply the ordinality of the media playlist
+ // within the main playlist
+
+ this.id = id; // Partially-apply the enableFunction to create a playlist-
+ // specific variant
+
+ this.enabled = enableFunction(vhsHandler.playlists, playlist.id, qualityChangeFunction);
+ }
+ }
+ /**
+ * A mixin function that adds the `representations` api to an instance
+ * of the VhsHandler class
+ *
+ * @param {VhsHandler} vhsHandler - An instance of VhsHandler to add the
+ * representation API into
+ */
+
+ const renditionSelectionMixin = function (vhsHandler) {
+ // Add a single API-specific function to the VhsHandler instance
+ vhsHandler.representations = () => {
+ const main = vhsHandler.playlistController_.main();
+ const playlists = isAudioOnly(main) ? vhsHandler.playlistController_.getAudioTrackPlaylists_() : main.playlists;
+ if (!playlists) {
+ return [];
+ }
+ return playlists.filter(media => !isIncompatible(media)).map((e, i) => new Representation(vhsHandler, e, e.id));
+ };
+ };
+
+ /**
+ * @file playback-watcher.js
+ *
+ * Playback starts, and now my watch begins. It shall not end until my death. I shall
+ * take no wait, hold no uncleared timeouts, father no bad seeks. I shall wear no crowns
+ * and win no glory. I shall live and die at my post. I am the corrector of the underflow.
+ * I am the watcher of gaps. I am the shield that guards the realms of seekable. I pledge
+ * my life and honor to the Playback Watch, for this Player and all the Players to come.
+ */
+
+ const timerCancelEvents = ['seeking', 'seeked', 'pause', 'playing', 'error'];
+ /**
+ * @class PlaybackWatcher
+ */
+
+ class PlaybackWatcher {
+ /**
+ * Represents an PlaybackWatcher object.
+ *
+ * @class
+ * @param {Object} options an object that includes the tech and settings
+ */
+ constructor(options) {
+ this.playlistController_ = options.playlistController;
+ this.tech_ = options.tech;
+ this.seekable = options.seekable;
+ this.allowSeeksWithinUnsafeLiveWindow = options.allowSeeksWithinUnsafeLiveWindow;
+ this.liveRangeSafeTimeDelta = options.liveRangeSafeTimeDelta;
+ this.media = options.media;
+ this.consecutiveUpdates = 0;
+ this.lastRecordedTime = null;
+ this.checkCurrentTimeTimeout_ = null;
+ this.logger_ = logger('PlaybackWatcher');
+ this.logger_('initialize');
+ const playHandler = () => this.monitorCurrentTime_();
+ const canPlayHandler = () => this.monitorCurrentTime_();
+ const waitingHandler = () => this.techWaiting_();
+ const cancelTimerHandler = () => this.resetTimeUpdate_();
+ const pc = this.playlistController_;
+ const loaderTypes = ['main', 'subtitle', 'audio'];
+ const loaderChecks = {};
+ loaderTypes.forEach(type => {
+ loaderChecks[type] = {
+ reset: () => this.resetSegmentDownloads_(type),
+ updateend: () => this.checkSegmentDownloads_(type)
+ };
+ pc[`${type}SegmentLoader_`].on('appendsdone', loaderChecks[type].updateend); // If a rendition switch happens during a playback stall where the buffer
+ // isn't changing we want to reset. We cannot assume that the new rendition
+ // will also be stalled, until after new appends.
+
+ pc[`${type}SegmentLoader_`].on('playlistupdate', loaderChecks[type].reset); // Playback stalls should not be detected right after seeking.
+ // This prevents one segment playlists (single vtt or single segment content)
+ // from being detected as stalling. As the buffer will not change in those cases, since
+ // the buffer is the entire video duration.
+
+ this.tech_.on(['seeked', 'seeking'], loaderChecks[type].reset);
+ });
+ /**
+ * We check if a seek was into a gap through the following steps:
+ * 1. We get a seeking event and we do not get a seeked event. This means that
+ * a seek was attempted but not completed.
+ * 2. We run `fixesBadSeeks_` on segment loader appends. This means that we already
+ * removed everything from our buffer and appended a segment, and should be ready
+ * to check for gaps.
+ */
+
+ const setSeekingHandlers = fn => {
+ ['main', 'audio'].forEach(type => {
+ pc[`${type}SegmentLoader_`][fn]('appended', this.seekingAppendCheck_);
+ });
+ };
+ this.seekingAppendCheck_ = () => {
+ if (this.fixesBadSeeks_()) {
+ this.consecutiveUpdates = 0;
+ this.lastRecordedTime = this.tech_.currentTime();
+ setSeekingHandlers('off');
+ }
+ };
+ this.clearSeekingAppendCheck_ = () => setSeekingHandlers('off');
+ this.watchForBadSeeking_ = () => {
+ this.clearSeekingAppendCheck_();
+ setSeekingHandlers('on');
+ };
+ this.tech_.on('seeked', this.clearSeekingAppendCheck_);
+ this.tech_.on('seeking', this.watchForBadSeeking_);
+ this.tech_.on('waiting', waitingHandler);
+ this.tech_.on(timerCancelEvents, cancelTimerHandler);
+ this.tech_.on('canplay', canPlayHandler);
+ /*
+ An edge case exists that results in gaps not being skipped when they exist at the beginning of a stream. This case
+ is surfaced in one of two ways:
+ 1) The `waiting` event is fired before the player has buffered content, making it impossible
+ to find or skip the gap. The `waiting` event is followed by a `play` event. On first play
+ we can check if playback is stalled due to a gap, and skip the gap if necessary.
+ 2) A source with a gap at the beginning of the stream is loaded programatically while the player
+ is in a playing state. To catch this case, it's important that our one-time play listener is setup
+ even if the player is in a playing state
+ */
+
+ this.tech_.one('play', playHandler); // Define the dispose function to clean up our events
+
+ this.dispose = () => {
+ this.clearSeekingAppendCheck_();
+ this.logger_('dispose');
+ this.tech_.off('waiting', waitingHandler);
+ this.tech_.off(timerCancelEvents, cancelTimerHandler);
+ this.tech_.off('canplay', canPlayHandler);
+ this.tech_.off('play', playHandler);
+ this.tech_.off('seeking', this.watchForBadSeeking_);
+ this.tech_.off('seeked', this.clearSeekingAppendCheck_);
+ loaderTypes.forEach(type => {
+ pc[`${type}SegmentLoader_`].off('appendsdone', loaderChecks[type].updateend);
+ pc[`${type}SegmentLoader_`].off('playlistupdate', loaderChecks[type].reset);
+ this.tech_.off(['seeked', 'seeking'], loaderChecks[type].reset);
+ });
+ if (this.checkCurrentTimeTimeout_) {
+ window.clearTimeout(this.checkCurrentTimeTimeout_);
+ }
+ this.resetTimeUpdate_();
+ };
+ }
+ /**
+ * Periodically check current time to see if playback stopped
+ *
+ * @private
+ */
+
+ monitorCurrentTime_() {
+ this.checkCurrentTime_();
+ if (this.checkCurrentTimeTimeout_) {
+ window.clearTimeout(this.checkCurrentTimeTimeout_);
+ } // 42 = 24 fps // 250 is what Webkit uses // FF uses 15
+
+ this.checkCurrentTimeTimeout_ = window.setTimeout(this.monitorCurrentTime_.bind(this), 250);
+ }
+ /**
+ * Reset stalled download stats for a specific type of loader
+ *
+ * @param {string} type
+ * The segment loader type to check.
+ *
+ * @listens SegmentLoader#playlistupdate
+ * @listens Tech#seeking
+ * @listens Tech#seeked
+ */
+
+ resetSegmentDownloads_(type) {
+ const loader = this.playlistController_[`${type}SegmentLoader_`];
+ if (this[`${type}StalledDownloads_`] > 0) {
+ this.logger_(`resetting possible stalled download count for ${type} loader`);
+ }
+ this[`${type}StalledDownloads_`] = 0;
+ this[`${type}Buffered_`] = loader.buffered_();
+ }
+ /**
+ * Checks on every segment `appendsdone` to see
+ * if segment appends are making progress. If they are not
+ * and we are still downloading bytes. We exclude the playlist.
+ *
+ * @param {string} type
+ * The segment loader type to check.
+ *
+ * @listens SegmentLoader#appendsdone
+ */
+
+ checkSegmentDownloads_(type) {
+ const pc = this.playlistController_;
+ const loader = pc[`${type}SegmentLoader_`];
+ const buffered = loader.buffered_();
+ const isBufferedDifferent = isRangeDifferent(this[`${type}Buffered_`], buffered);
+ this[`${type}Buffered_`] = buffered; // if another watcher is going to fix the issue or
+ // the buffered value for this loader changed
+ // appends are working
+
+ if (isBufferedDifferent) {
+ this.resetSegmentDownloads_(type);
+ return;
+ }
+ this[`${type}StalledDownloads_`]++;
+ this.logger_(`found #${this[`${type}StalledDownloads_`]} ${type} appends that did not increase buffer (possible stalled download)`, {
+ playlistId: loader.playlist_ && loader.playlist_.id,
+ buffered: timeRangesToArray(buffered)
+ }); // after 10 possibly stalled appends with no reset, exclude
+
+ if (this[`${type}StalledDownloads_`] < 10) {
+ return;
+ }
+ this.logger_(`${type} loader stalled download exclusion`);
+ this.resetSegmentDownloads_(type);
+ this.tech_.trigger({
+ type: 'usage',
+ name: `vhs-${type}-download-exclusion`
+ });
+ if (type === 'subtitle') {
+ return;
+ } // TODO: should we exclude audio tracks rather than main tracks
+ // when type is audio?
+
+ pc.excludePlaylist({
+ error: {
+ message: `Excessive ${type} segment downloading detected.`
+ },
+ playlistExclusionDuration: Infinity
+ });
+ }
+ /**
+ * The purpose of this function is to emulate the "waiting" event on
+ * browsers that do not emit it when they are waiting for more
+ * data to continue playback
+ *
+ * @private
+ */
+
+ checkCurrentTime_() {
+ if (this.tech_.paused() || this.tech_.seeking()) {
+ return;
+ }
+ const currentTime = this.tech_.currentTime();
+ const buffered = this.tech_.buffered();
+ if (this.lastRecordedTime === currentTime && (!buffered.length || currentTime + SAFE_TIME_DELTA >= buffered.end(buffered.length - 1))) {
+ // If current time is at the end of the final buffered region, then any playback
+ // stall is most likely caused by buffering in a low bandwidth environment. The tech
+ // should fire a `waiting` event in this scenario, but due to browser and tech
+ // inconsistencies. Calling `techWaiting_` here allows us to simulate
+ // responding to a native `waiting` event when the tech fails to emit one.
+ return this.techWaiting_();
+ }
+ if (this.consecutiveUpdates >= 5 && currentTime === this.lastRecordedTime) {
+ this.consecutiveUpdates++;
+ this.waiting_();
+ } else if (currentTime === this.lastRecordedTime) {
+ this.consecutiveUpdates++;
+ } else {
+ this.consecutiveUpdates = 0;
+ this.lastRecordedTime = currentTime;
+ }
+ }
+ /**
+ * Resets the 'timeupdate' mechanism designed to detect that we are stalled
+ *
+ * @private
+ */
+
+ resetTimeUpdate_() {
+ this.consecutiveUpdates = 0;
+ }
+ /**
+ * Fixes situations where there's a bad seek
+ *
+ * @return {boolean} whether an action was taken to fix the seek
+ * @private
+ */
+
+ fixesBadSeeks_() {
+ const seeking = this.tech_.seeking();
+ if (!seeking) {
+ return false;
+ } // TODO: It's possible that these seekable checks should be moved out of this function
+ // and into a function that runs on seekablechange. It's also possible that we only need
+ // afterSeekableWindow as the buffered check at the bottom is good enough to handle before
+ // seekable range.
+
+ const seekable = this.seekable();
+ const currentTime = this.tech_.currentTime();
+ const isAfterSeekableRange = this.afterSeekableWindow_(seekable, currentTime, this.media(), this.allowSeeksWithinUnsafeLiveWindow);
+ let seekTo;
+ if (isAfterSeekableRange) {
+ const seekableEnd = seekable.end(seekable.length - 1); // sync to live point (if VOD, our seekable was updated and we're simply adjusting)
+
+ seekTo = seekableEnd;
+ }
+ if (this.beforeSeekableWindow_(seekable, currentTime)) {
+ const seekableStart = seekable.start(0); // sync to the beginning of the live window
+ // provide a buffer of .1 seconds to handle rounding/imprecise numbers
+
+ seekTo = seekableStart + (
+ // if the playlist is too short and the seekable range is an exact time (can
+ // happen in live with a 3 segment playlist), then don't use a time delta
+ seekableStart === seekable.end(0) ? 0 : SAFE_TIME_DELTA);
+ }
+ if (typeof seekTo !== 'undefined') {
+ this.logger_(`Trying to seek outside of seekable at time ${currentTime} with ` + `seekable range ${printableRange(seekable)}. Seeking to ` + `${seekTo}.`);
+ this.tech_.setCurrentTime(seekTo);
+ return true;
+ }
+ const sourceUpdater = this.playlistController_.sourceUpdater_;
+ const buffered = this.tech_.buffered();
+ const audioBuffered = sourceUpdater.audioBuffer ? sourceUpdater.audioBuffered() : null;
+ const videoBuffered = sourceUpdater.videoBuffer ? sourceUpdater.videoBuffered() : null;
+ const media = this.media(); // verify that at least two segment durations or one part duration have been
+ // appended before checking for a gap.
+
+ const minAppendedDuration = media.partTargetDuration ? media.partTargetDuration : (media.targetDuration - TIME_FUDGE_FACTOR) * 2; // verify that at least two segment durations have been
+ // appended before checking for a gap.
+
+ const bufferedToCheck = [audioBuffered, videoBuffered];
+ for (let i = 0; i < bufferedToCheck.length; i++) {
+ // skip null buffered
+ if (!bufferedToCheck[i]) {
+ continue;
+ }
+ const timeAhead = timeAheadOf(bufferedToCheck[i], currentTime); // if we are less than two video/audio segment durations or one part
+ // duration behind we haven't appended enough to call this a bad seek.
+
+ if (timeAhead < minAppendedDuration) {
+ return false;
+ }
+ }
+ const nextRange = findNextRange(buffered, currentTime); // we have appended enough content, but we don't have anything buffered
+ // to seek over the gap
+
+ if (nextRange.length === 0) {
+ return false;
+ }
+ seekTo = nextRange.start(0) + SAFE_TIME_DELTA;
+ this.logger_(`Buffered region starts (${nextRange.start(0)}) ` + ` just beyond seek point (${currentTime}). Seeking to ${seekTo}.`);
+ this.tech_.setCurrentTime(seekTo);
+ return true;
+ }
+ /**
+ * Handler for situations when we determine the player is waiting.
+ *
+ * @private
+ */
+
+ waiting_() {
+ if (this.techWaiting_()) {
+ return;
+ } // All tech waiting checks failed. Use last resort correction
+
+ const currentTime = this.tech_.currentTime();
+ const buffered = this.tech_.buffered();
+ const currentRange = findRange(buffered, currentTime); // Sometimes the player can stall for unknown reasons within a contiguous buffered
+ // region with no indication that anything is amiss (seen in Firefox). Seeking to
+ // currentTime is usually enough to kickstart the player. This checks that the player
+ // is currently within a buffered region before attempting a corrective seek.
+ // Chrome does not appear to continue `timeupdate` events after a `waiting` event
+ // until there is ~ 3 seconds of forward buffer available. PlaybackWatcher should also
+ // make sure there is ~3 seconds of forward buffer before taking any corrective action
+ // to avoid triggering an `unknownwaiting` event when the network is slow.
+
+ if (currentRange.length && currentTime + 3 <= currentRange.end(0)) {
+ this.resetTimeUpdate_();
+ this.tech_.setCurrentTime(currentTime);
+ this.logger_(`Stopped at ${currentTime} while inside a buffered region ` + `[${currentRange.start(0)} -> ${currentRange.end(0)}]. Attempting to resume ` + 'playback by seeking to the current time.'); // unknown waiting corrections may be useful for monitoring QoS
+
+ this.tech_.trigger({
+ type: 'usage',
+ name: 'vhs-unknown-waiting'
+ });
+ return;
+ }
+ }
+ /**
+ * Handler for situations when the tech fires a `waiting` event
+ *
+ * @return {boolean}
+ * True if an action (or none) was needed to correct the waiting. False if no
+ * checks passed
+ * @private
+ */
+
+ techWaiting_() {
+ const seekable = this.seekable();
+ const currentTime = this.tech_.currentTime();
+ if (this.tech_.seeking()) {
+ // Tech is seeking or already waiting on another action, no action needed
+ return true;
+ }
+ if (this.beforeSeekableWindow_(seekable, currentTime)) {
+ const livePoint = seekable.end(seekable.length - 1);
+ this.logger_(`Fell out of live window at time ${currentTime}. Seeking to ` + `live point (seekable end) ${livePoint}`);
+ this.resetTimeUpdate_();
+ this.tech_.setCurrentTime(livePoint); // live window resyncs may be useful for monitoring QoS
+
+ this.tech_.trigger({
+ type: 'usage',
+ name: 'vhs-live-resync'
+ });
+ return true;
+ }
+ const sourceUpdater = this.tech_.vhs.playlistController_.sourceUpdater_;
+ const buffered = this.tech_.buffered();
+ const videoUnderflow = this.videoUnderflow_({
+ audioBuffered: sourceUpdater.audioBuffered(),
+ videoBuffered: sourceUpdater.videoBuffered(),
+ currentTime
+ });
+ if (videoUnderflow) {
+ // Even though the video underflowed and was stuck in a gap, the audio overplayed
+ // the gap, leading currentTime into a buffered range. Seeking to currentTime
+ // allows the video to catch up to the audio position without losing any audio
+ // (only suffering ~3 seconds of frozen video and a pause in audio playback).
+ this.resetTimeUpdate_();
+ this.tech_.setCurrentTime(currentTime); // video underflow may be useful for monitoring QoS
+
+ this.tech_.trigger({
+ type: 'usage',
+ name: 'vhs-video-underflow'
+ });
+ return true;
+ }
+ const nextRange = findNextRange(buffered, currentTime); // check for gap
+
+ if (nextRange.length > 0) {
+ this.logger_(`Stopped at ${currentTime} and seeking to ${nextRange.start(0)}`);
+ this.resetTimeUpdate_();
+ this.skipTheGap_(currentTime);
+ return true;
+ } // All checks failed. Returning false to indicate failure to correct waiting
+
+ return false;
+ }
+ afterSeekableWindow_(seekable, currentTime, playlist, allowSeeksWithinUnsafeLiveWindow = false) {
+ if (!seekable.length) {
+ // we can't make a solid case if there's no seekable, default to false
+ return false;
+ }
+ let allowedEnd = seekable.end(seekable.length - 1) + SAFE_TIME_DELTA;
+ const isLive = !playlist.endList;
+ const isLLHLS = typeof playlist.partTargetDuration === 'number';
+ if (isLive && (isLLHLS || allowSeeksWithinUnsafeLiveWindow)) {
+ allowedEnd = seekable.end(seekable.length - 1) + playlist.targetDuration * 3;
+ }
+ if (currentTime > allowedEnd) {
+ return true;
+ }
+ return false;
+ }
+ beforeSeekableWindow_(seekable, currentTime) {
+ if (seekable.length &&
+ // can't fall before 0 and 0 seekable start identifies VOD stream
+ seekable.start(0) > 0 && currentTime < seekable.start(0) - this.liveRangeSafeTimeDelta) {
+ return true;
+ }
+ return false;
+ }
+ videoUnderflow_({
+ videoBuffered,
+ audioBuffered,
+ currentTime
+ }) {
+ // audio only content will not have video underflow :)
+ if (!videoBuffered) {
+ return;
+ }
+ let gap; // find a gap in demuxed content.
+
+ if (videoBuffered.length && audioBuffered.length) {
+ // in Chrome audio will continue to play for ~3s when we run out of video
+ // so we have to check that the video buffer did have some buffer in the
+ // past.
+ const lastVideoRange = findRange(videoBuffered, currentTime - 3);
+ const videoRange = findRange(videoBuffered, currentTime);
+ const audioRange = findRange(audioBuffered, currentTime);
+ if (audioRange.length && !videoRange.length && lastVideoRange.length) {
+ gap = {
+ start: lastVideoRange.end(0),
+ end: audioRange.end(0)
+ };
+ } // find a gap in muxed content.
+ } else {
+ const nextRange = findNextRange(videoBuffered, currentTime); // Even if there is no available next range, there is still a possibility we are
+ // stuck in a gap due to video underflow.
+
+ if (!nextRange.length) {
+ gap = this.gapFromVideoUnderflow_(videoBuffered, currentTime);
+ }
+ }
+ if (gap) {
+ this.logger_(`Encountered a gap in video from ${gap.start} to ${gap.end}. ` + `Seeking to current time ${currentTime}`);
+ return true;
+ }
+ return false;
+ }
+ /**
+ * Timer callback. If playback still has not proceeded, then we seek
+ * to the start of the next buffered region.
+ *
+ * @private
+ */
+
+ skipTheGap_(scheduledCurrentTime) {
+ const buffered = this.tech_.buffered();
+ const currentTime = this.tech_.currentTime();
+ const nextRange = findNextRange(buffered, currentTime);
+ this.resetTimeUpdate_();
+ if (nextRange.length === 0 || currentTime !== scheduledCurrentTime) {
+ return;
+ }
+ this.logger_('skipTheGap_:', 'currentTime:', currentTime, 'scheduled currentTime:', scheduledCurrentTime, 'nextRange start:', nextRange.start(0)); // only seek if we still have not played
+
+ this.tech_.setCurrentTime(nextRange.start(0) + TIME_FUDGE_FACTOR);
+ this.tech_.trigger({
+ type: 'usage',
+ name: 'vhs-gap-skip'
+ });
+ }
+ gapFromVideoUnderflow_(buffered, currentTime) {
+ // At least in Chrome, if there is a gap in the video buffer, the audio will continue
+ // playing for ~3 seconds after the video gap starts. This is done to account for
+ // video buffer underflow/underrun (note that this is not done when there is audio
+ // buffer underflow/underrun -- in that case the video will stop as soon as it
+ // encounters the gap, as audio stalls are more noticeable/jarring to a user than
+ // video stalls). The player's time will reflect the playthrough of audio, so the
+ // time will appear as if we are in a buffered region, even if we are stuck in a
+ // "gap."
+ //
+ // Example:
+ // video buffer: 0 => 10.1, 10.2 => 20
+ // audio buffer: 0 => 20
+ // overall buffer: 0 => 10.1, 10.2 => 20
+ // current time: 13
+ //
+ // Chrome's video froze at 10 seconds, where the video buffer encountered the gap,
+ // however, the audio continued playing until it reached ~3 seconds past the gap
+ // (13 seconds), at which point it stops as well. Since current time is past the
+ // gap, findNextRange will return no ranges.
+ //
+ // To check for this issue, we see if there is a gap that starts somewhere within
+ // a 3 second range (3 seconds +/- 1 second) back from our current time.
+ const gaps = findGaps(buffered);
+ for (let i = 0; i < gaps.length; i++) {
+ const start = gaps.start(i);
+ const end = gaps.end(i); // gap is starts no more than 4 seconds back
+
+ if (currentTime - start < 4 && currentTime - start > 2) {
+ return {
+ start,
+ end
+ };
+ }
+ }
+ return null;
+ }
+ }
+ const defaultOptions = {
+ errorInterval: 30,
+ getSource(next) {
+ const tech = this.tech({
+ IWillNotUseThisInPlugins: true
+ });
+ const sourceObj = tech.currentSource_ || this.currentSource();
+ return next(sourceObj);
+ }
+ };
+ /**
+ * Main entry point for the plugin
+ *
+ * @param {Player} player a reference to a videojs Player instance
+ * @param {Object} [options] an object with plugin options
+ * @private
+ */
+
+ const initPlugin = function (player, options) {
+ let lastCalled = 0;
+ let seekTo = 0;
+ const localOptions = merge(defaultOptions, options);
+ player.ready(() => {
+ player.trigger({
+ type: 'usage',
+ name: 'vhs-error-reload-initialized'
+ });
+ });
+ /**
+ * Player modifications to perform that must wait until `loadedmetadata`
+ * has been triggered
+ *
+ * @private
+ */
+
+ const loadedMetadataHandler = function () {
+ if (seekTo) {
+ player.currentTime(seekTo);
+ }
+ };
+ /**
+ * Set the source on the player element, play, and seek if necessary
+ *
+ * @param {Object} sourceObj An object specifying the source url and mime-type to play
+ * @private
+ */
+
+ const setSource = function (sourceObj) {
+ if (sourceObj === null || sourceObj === undefined) {
+ return;
+ }
+ seekTo = player.duration() !== Infinity && player.currentTime() || 0;
+ player.one('loadedmetadata', loadedMetadataHandler);
+ player.src(sourceObj);
+ player.trigger({
+ type: 'usage',
+ name: 'vhs-error-reload'
+ });
+ player.play();
+ };
+ /**
+ * Attempt to get a source from either the built-in getSource function
+ * or a custom function provided via the options
+ *
+ * @private
+ */
+
+ const errorHandler = function () {
+ // Do not attempt to reload the source if a source-reload occurred before
+ // 'errorInterval' time has elapsed since the last source-reload
+ if (Date.now() - lastCalled < localOptions.errorInterval * 1000) {
+ player.trigger({
+ type: 'usage',
+ name: 'vhs-error-reload-canceled'
+ });
+ return;
+ }
+ if (!localOptions.getSource || typeof localOptions.getSource !== 'function') {
+ videojs.log.error('ERROR: reloadSourceOnError - The option getSource must be a function!');
+ return;
+ }
+ lastCalled = Date.now();
+ return localOptions.getSource.call(player, setSource);
+ };
+ /**
+ * Unbind any event handlers that were bound by the plugin
+ *
+ * @private
+ */
+
+ const cleanupEvents = function () {
+ player.off('loadedmetadata', loadedMetadataHandler);
+ player.off('error', errorHandler);
+ player.off('dispose', cleanupEvents);
+ };
+ /**
+ * Cleanup before re-initializing the plugin
+ *
+ * @param {Object} [newOptions] an object with plugin options
+ * @private
+ */
+
+ const reinitPlugin = function (newOptions) {
+ cleanupEvents();
+ initPlugin(player, newOptions);
+ };
+ player.on('error', errorHandler);
+ player.on('dispose', cleanupEvents); // Overwrite the plugin function so that we can correctly cleanup before
+ // initializing the plugin
+
+ player.reloadSourceOnError = reinitPlugin;
+ };
+ /**
+ * Reload the source when an error is detected as long as there
+ * wasn't an error previously within the last 30 seconds
+ *
+ * @param {Object} [options] an object with plugin options
+ */
+
+ const reloadSourceOnError = function (options) {
+ initPlugin(this, options);
+ };
+ var version$4 = "3.12.1";
+ var version$3 = "7.0.3";
+ var version$2 = "1.3.0";
+ var version$1 = "7.1.0";
+ var version = "4.0.1";
+
+ /**
+ * @file videojs-http-streaming.js
+ *
+ * The main file for the VHS project.
+ * License: https://github.com/videojs/videojs-http-streaming/blob/main/LICENSE
+ */
+ const Vhs = {
+ PlaylistLoader,
+ Playlist,
+ utils,
+ STANDARD_PLAYLIST_SELECTOR: lastBandwidthSelector,
+ INITIAL_PLAYLIST_SELECTOR: lowestBitrateCompatibleVariantSelector,
+ lastBandwidthSelector,
+ movingAverageBandwidthSelector,
+ comparePlaylistBandwidth,
+ comparePlaylistResolution,
+ xhr: xhrFactory()
+ }; // Define getter/setters for config properties
+
+ Object.keys(Config).forEach(prop => {
+ Object.defineProperty(Vhs, prop, {
+ get() {
+ videojs.log.warn(`using Vhs.${prop} is UNSAFE be sure you know what you are doing`);
+ return Config[prop];
+ },
+ set(value) {
+ videojs.log.warn(`using Vhs.${prop} is UNSAFE be sure you know what you are doing`);
+ if (typeof value !== 'number' || value < 0) {
+ videojs.log.warn(`value of Vhs.${prop} must be greater than or equal to 0`);
+ return;
+ }
+ Config[prop] = value;
+ }
+ });
+ });
+ const LOCAL_STORAGE_KEY = 'videojs-vhs';
+ /**
+ * Updates the selectedIndex of the QualityLevelList when a mediachange happens in vhs.
+ *
+ * @param {QualityLevelList} qualityLevels The QualityLevelList to update.
+ * @param {PlaylistLoader} playlistLoader PlaylistLoader containing the new media info.
+ * @function handleVhsMediaChange
+ */
+
+ const handleVhsMediaChange = function (qualityLevels, playlistLoader) {
+ const newPlaylist = playlistLoader.media();
+ let selectedIndex = -1;
+ for (let i = 0; i < qualityLevels.length; i++) {
+ if (qualityLevels[i].id === newPlaylist.id) {
+ selectedIndex = i;
+ break;
+ }
+ }
+ qualityLevels.selectedIndex_ = selectedIndex;
+ qualityLevels.trigger({
+ selectedIndex,
+ type: 'change'
+ });
+ };
+ /**
+ * Adds quality levels to list once playlist metadata is available
+ *
+ * @param {QualityLevelList} qualityLevels The QualityLevelList to attach events to.
+ * @param {Object} vhs Vhs object to listen to for media events.
+ * @function handleVhsLoadedMetadata
+ */
+
+ const handleVhsLoadedMetadata = function (qualityLevels, vhs) {
+ vhs.representations().forEach(rep => {
+ qualityLevels.addQualityLevel(rep);
+ });
+ handleVhsMediaChange(qualityLevels, vhs.playlists);
+ }; // VHS is a source handler, not a tech. Make sure attempts to use it
+ // as one do not cause exceptions.
+
+ Vhs.canPlaySource = function () {
+ return videojs.log.warn('VHS is no longer a tech. Please remove it from ' + 'your player\'s techOrder.');
+ };
+ const emeKeySystems = (keySystemOptions, mainPlaylist, audioPlaylist) => {
+ if (!keySystemOptions) {
+ return keySystemOptions;
+ }
+ let codecs = {};
+ if (mainPlaylist && mainPlaylist.attributes && mainPlaylist.attributes.CODECS) {
+ codecs = unwrapCodecList(parseCodecs(mainPlaylist.attributes.CODECS));
+ }
+ if (audioPlaylist && audioPlaylist.attributes && audioPlaylist.attributes.CODECS) {
+ codecs.audio = audioPlaylist.attributes.CODECS;
+ }
+ const videoContentType = getMimeForCodec(codecs.video);
+ const audioContentType = getMimeForCodec(codecs.audio); // upsert the content types based on the selected playlist
+
+ const keySystemContentTypes = {};
+ for (const keySystem in keySystemOptions) {
+ keySystemContentTypes[keySystem] = {};
+ if (audioContentType) {
+ keySystemContentTypes[keySystem].audioContentType = audioContentType;
+ }
+ if (videoContentType) {
+ keySystemContentTypes[keySystem].videoContentType = videoContentType;
+ } // Default to using the video playlist's PSSH even though they may be different, as
+ // videojs-contrib-eme will only accept one in the options.
+ //
+ // This shouldn't be an issue for most cases as early intialization will handle all
+ // unique PSSH values, and if they aren't, then encrypted events should have the
+ // specific information needed for the unique license.
+
+ if (mainPlaylist.contentProtection && mainPlaylist.contentProtection[keySystem] && mainPlaylist.contentProtection[keySystem].pssh) {
+ keySystemContentTypes[keySystem].pssh = mainPlaylist.contentProtection[keySystem].pssh;
+ } // videojs-contrib-eme accepts the option of specifying: 'com.some.cdm': 'url'
+ // so we need to prevent overwriting the URL entirely
+
+ if (typeof keySystemOptions[keySystem] === 'string') {
+ keySystemContentTypes[keySystem].url = keySystemOptions[keySystem];
+ }
+ }
+ return merge(keySystemOptions, keySystemContentTypes);
+ };
+ /**
+ * @typedef {Object} KeySystems
+ *
+ * keySystems configuration for https://github.com/videojs/videojs-contrib-eme
+ * Note: not all options are listed here.
+ *
+ * @property {Uint8Array} [pssh]
+ * Protection System Specific Header
+ */
+
+ /**
+ * Goes through all the playlists and collects an array of KeySystems options objects
+ * containing each playlist's keySystems and their pssh values, if available.
+ *
+ * @param {Object[]} playlists
+ * The playlists to look through
+ * @param {string[]} keySystems
+ * The keySystems to collect pssh values for
+ *
+ * @return {KeySystems[]}
+ * An array of KeySystems objects containing available key systems and their
+ * pssh values
+ */
+
+ const getAllPsshKeySystemsOptions = (playlists, keySystems) => {
+ return playlists.reduce((keySystemsArr, playlist) => {
+ if (!playlist.contentProtection) {
+ return keySystemsArr;
+ }
+ const keySystemsOptions = keySystems.reduce((keySystemsObj, keySystem) => {
+ const keySystemOptions = playlist.contentProtection[keySystem];
+ if (keySystemOptions && keySystemOptions.pssh) {
+ keySystemsObj[keySystem] = {
+ pssh: keySystemOptions.pssh
+ };
+ }
+ return keySystemsObj;
+ }, {});
+ if (Object.keys(keySystemsOptions).length) {
+ keySystemsArr.push(keySystemsOptions);
+ }
+ return keySystemsArr;
+ }, []);
+ };
+ /**
+ * Returns a promise that waits for the
+ * [eme plugin](https://github.com/videojs/videojs-contrib-eme) to create a key session.
+ *
+ * Works around https://bugs.chromium.org/p/chromium/issues/detail?id=895449 in non-IE11
+ * browsers.
+ *
+ * As per the above ticket, this is particularly important for Chrome, where, if
+ * unencrypted content is appended before encrypted content and the key session has not
+ * been created, a MEDIA_ERR_DECODE will be thrown once the encrypted content is reached
+ * during playback.
+ *
+ * @param {Object} player
+ * The player instance
+ * @param {Object[]} sourceKeySystems
+ * The key systems options from the player source
+ * @param {Object} [audioMedia]
+ * The active audio media playlist (optional)
+ * @param {Object[]} mainPlaylists
+ * The playlists found on the main playlist object
+ *
+ * @return {Object}
+ * Promise that resolves when the key session has been created
+ */
+
+ const waitForKeySessionCreation = ({
+ player,
+ sourceKeySystems,
+ audioMedia,
+ mainPlaylists
+ }) => {
+ if (!player.eme.initializeMediaKeys) {
+ return Promise.resolve();
+ } // TODO should all audio PSSH values be initialized for DRM?
+ //
+ // All unique video rendition pssh values are initialized for DRM, but here only
+ // the initial audio playlist license is initialized. In theory, an encrypted
+ // event should be fired if the user switches to an alternative audio playlist
+ // where a license is required, but this case hasn't yet been tested. In addition, there
+ // may be many alternate audio playlists unlikely to be used (e.g., multiple different
+ // languages).
+
+ const playlists = audioMedia ? mainPlaylists.concat([audioMedia]) : mainPlaylists;
+ const keySystemsOptionsArr = getAllPsshKeySystemsOptions(playlists, Object.keys(sourceKeySystems));
+ const initializationFinishedPromises = [];
+ const keySessionCreatedPromises = []; // Since PSSH values are interpreted as initData, EME will dedupe any duplicates. The
+ // only place where it should not be deduped is for ms-prefixed APIs, but
+ // the existence of modern EME APIs in addition to
+ // ms-prefixed APIs on Edge should prevent this from being a concern.
+ // initializeMediaKeys also won't use the webkit-prefixed APIs.
+
+ keySystemsOptionsArr.forEach(keySystemsOptions => {
+ keySessionCreatedPromises.push(new Promise((resolve, reject) => {
+ player.tech_.one('keysessioncreated', resolve);
+ }));
+ initializationFinishedPromises.push(new Promise((resolve, reject) => {
+ player.eme.initializeMediaKeys({
+ keySystems: keySystemsOptions
+ }, err => {
+ if (err) {
+ reject(err);
+ return;
+ }
+ resolve();
+ });
+ }));
+ }); // The reasons Promise.race is chosen over Promise.any:
+ //
+ // * Promise.any is only available in Safari 14+.
+ // * None of these promises are expected to reject. If they do reject, it might be
+ // better here for the race to surface the rejection, rather than mask it by using
+ // Promise.any.
+
+ return Promise.race([
+ // If a session was previously created, these will all finish resolving without
+ // creating a new session, otherwise it will take until the end of all license
+ // requests, which is why the key session check is used (to make setup much faster).
+ Promise.all(initializationFinishedPromises),
+ // Once a single session is created, the browser knows DRM will be used.
+ Promise.race(keySessionCreatedPromises)]);
+ };
+ /**
+ * If the [eme](https://github.com/videojs/videojs-contrib-eme) plugin is available, and
+ * there are keySystems on the source, sets up source options to prepare the source for
+ * eme.
+ *
+ * @param {Object} player
+ * The player instance
+ * @param {Object[]} sourceKeySystems
+ * The key systems options from the player source
+ * @param {Object} media
+ * The active media playlist
+ * @param {Object} [audioMedia]
+ * The active audio media playlist (optional)
+ *
+ * @return {boolean}
+ * Whether or not options were configured and EME is available
+ */
+
+ const setupEmeOptions = ({
+ player,
+ sourceKeySystems,
+ media,
+ audioMedia
+ }) => {
+ const sourceOptions = emeKeySystems(sourceKeySystems, media, audioMedia);
+ if (!sourceOptions) {
+ return false;
+ }
+ player.currentSource().keySystems = sourceOptions; // eme handles the rest of the setup, so if it is missing
+ // do nothing.
+
+ if (sourceOptions && !player.eme) {
+ videojs.log.warn('DRM encrypted source cannot be decrypted without a DRM plugin');
+ return false;
+ }
+ return true;
+ };
+ const getVhsLocalStorage = () => {
+ if (!window.localStorage) {
+ return null;
+ }
+ const storedObject = window.localStorage.getItem(LOCAL_STORAGE_KEY);
+ if (!storedObject) {
+ return null;
+ }
+ try {
+ return JSON.parse(storedObject);
+ } catch (e) {
+ // someone may have tampered with the value
+ return null;
+ }
+ };
+ const updateVhsLocalStorage = options => {
+ if (!window.localStorage) {
+ return false;
+ }
+ let objectToStore = getVhsLocalStorage();
+ objectToStore = objectToStore ? merge(objectToStore, options) : options;
+ try {
+ window.localStorage.setItem(LOCAL_STORAGE_KEY, JSON.stringify(objectToStore));
+ } catch (e) {
+ // Throws if storage is full (e.g., always on iOS 5+ Safari private mode, where
+ // storage is set to 0).
+ // https://developer.mozilla.org/en-US/docs/Web/API/Storage/setItem#Exceptions
+ // No need to perform any operation.
+ return false;
+ }
+ return objectToStore;
+ };
+ /**
+ * Parses VHS-supported media types from data URIs. See
+ * https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/Data_URIs
+ * for information on data URIs.
+ *
+ * @param {string} dataUri
+ * The data URI
+ *
+ * @return {string|Object}
+ * The parsed object/string, or the original string if no supported media type
+ * was found
+ */
+
+ const expandDataUri = dataUri => {
+ if (dataUri.toLowerCase().indexOf('data:application/vnd.videojs.vhs+json,') === 0) {
+ return JSON.parse(dataUri.substring(dataUri.indexOf(',') + 1));
+ } // no known case for this data URI, return the string as-is
+
+ return dataUri;
+ };
+ /**
+ * Adds a request hook to an xhr object
+ *
+ * @param {Object} xhr object to add the onRequest hook to
+ * @param {function} callback hook function for an xhr request
+ */
+
+ const addOnRequestHook = (xhr, callback) => {
+ if (!xhr._requestCallbackSet) {
+ xhr._requestCallbackSet = new Set();
+ }
+ xhr._requestCallbackSet.add(callback);
+ };
+ /**
+ * Adds a response hook to an xhr object
+ *
+ * @param {Object} xhr object to add the onResponse hook to
+ * @param {function} callback hook function for an xhr response
+ */
+
+ const addOnResponseHook = (xhr, callback) => {
+ if (!xhr._responseCallbackSet) {
+ xhr._responseCallbackSet = new Set();
+ }
+ xhr._responseCallbackSet.add(callback);
+ };
+ /**
+ * Removes a request hook on an xhr object, deletes the onRequest set if empty.
+ *
+ * @param {Object} xhr object to remove the onRequest hook from
+ * @param {function} callback hook function to remove
+ */
+
+ const removeOnRequestHook = (xhr, callback) => {
+ if (!xhr._requestCallbackSet) {
+ return;
+ }
+ xhr._requestCallbackSet.delete(callback);
+ if (!xhr._requestCallbackSet.size) {
+ delete xhr._requestCallbackSet;
+ }
+ };
+ /**
+ * Removes a response hook on an xhr object, deletes the onResponse set if empty.
+ *
+ * @param {Object} xhr object to remove the onResponse hook from
+ * @param {function} callback hook function to remove
+ */
+
+ const removeOnResponseHook = (xhr, callback) => {
+ if (!xhr._responseCallbackSet) {
+ return;
+ }
+ xhr._responseCallbackSet.delete(callback);
+ if (!xhr._responseCallbackSet.size) {
+ delete xhr._responseCallbackSet;
+ }
+ };
+ /**
+ * Whether the browser has built-in HLS support.
+ */
+
+ Vhs.supportsNativeHls = function () {
+ if (!document || !document.createElement) {
+ return false;
+ }
+ const video = document.createElement('video'); // native HLS is definitely not supported if HTML5 video isn't
+
+ if (!videojs.getTech('Html5').isSupported()) {
+ return false;
+ } // HLS manifests can go by many mime-types
+
+ const canPlay = [
+ // Apple santioned
+ 'application/vnd.apple.mpegurl',
+ // Apple sanctioned for backwards compatibility
+ 'audio/mpegurl',
+ // Very common
+ 'audio/x-mpegurl',
+ // Very common
+ 'application/x-mpegurl',
+ // Included for completeness
+ 'video/x-mpegurl', 'video/mpegurl', 'application/mpegurl'];
+ return canPlay.some(function (canItPlay) {
+ return /maybe|probably/i.test(video.canPlayType(canItPlay));
+ });
+ }();
+ Vhs.supportsNativeDash = function () {
+ if (!document || !document.createElement || !videojs.getTech('Html5').isSupported()) {
+ return false;
+ }
+ return /maybe|probably/i.test(document.createElement('video').canPlayType('application/dash+xml'));
+ }();
+ Vhs.supportsTypeNatively = type => {
+ if (type === 'hls') {
+ return Vhs.supportsNativeHls;
+ }
+ if (type === 'dash') {
+ return Vhs.supportsNativeDash;
+ }
+ return false;
+ };
+ /**
+ * VHS is a source handler, not a tech. Make sure attempts to use it
+ * as one do not cause exceptions.
+ */
+
+ Vhs.isSupported = function () {
+ return videojs.log.warn('VHS is no longer a tech. Please remove it from ' + 'your player\'s techOrder.');
+ };
+ /**
+ * A global function for setting an onRequest hook
+ *
+ * @param {function} callback for request modifiction
+ */
+
+ Vhs.xhr.onRequest = function (callback) {
+ addOnRequestHook(Vhs.xhr, callback);
+ };
+ /**
+ * A global function for setting an onResponse hook
+ *
+ * @param {callback} callback for response data retrieval
+ */
+
+ Vhs.xhr.onResponse = function (callback) {
+ addOnResponseHook(Vhs.xhr, callback);
+ };
+ /**
+ * Deletes a global onRequest callback if it exists
+ *
+ * @param {function} callback to delete from the global set
+ */
+
+ Vhs.xhr.offRequest = function (callback) {
+ removeOnRequestHook(Vhs.xhr, callback);
+ };
+ /**
+ * Deletes a global onResponse callback if it exists
+ *
+ * @param {function} callback to delete from the global set
+ */
+
+ Vhs.xhr.offResponse = function (callback) {
+ removeOnResponseHook(Vhs.xhr, callback);
+ };
+ const Component = videojs.getComponent('Component');
+ /**
+ * The Vhs Handler object, where we orchestrate all of the parts
+ * of VHS to interact with video.js
+ *
+ * @class VhsHandler
+ * @extends videojs.Component
+ * @param {Object} source the soruce object
+ * @param {Tech} tech the parent tech object
+ * @param {Object} options optional and required options
+ */
+
+ class VhsHandler extends Component {
+ constructor(source, tech, options) {
+ super(tech, options.vhs); // if a tech level `initialBandwidth` option was passed
+ // use that over the VHS level `bandwidth` option
+
+ if (typeof options.initialBandwidth === 'number') {
+ this.options_.bandwidth = options.initialBandwidth;
+ }
+ this.logger_ = logger('VhsHandler'); // we need access to the player in some cases,
+ // so, get it from Video.js via the `playerId`
+
+ if (tech.options_ && tech.options_.playerId) {
+ const _player = videojs.getPlayer(tech.options_.playerId);
+ this.player_ = _player;
+ }
+ this.tech_ = tech;
+ this.source_ = source;
+ this.stats = {};
+ this.ignoreNextSeekingEvent_ = false;
+ this.setOptions_();
+ if (this.options_.overrideNative && tech.overrideNativeAudioTracks && tech.overrideNativeVideoTracks) {
+ tech.overrideNativeAudioTracks(true);
+ tech.overrideNativeVideoTracks(true);
+ } else if (this.options_.overrideNative && (tech.featuresNativeVideoTracks || tech.featuresNativeAudioTracks)) {
+ // overriding native VHS only works if audio tracks have been emulated
+ // error early if we're misconfigured
+ throw new Error('Overriding native VHS requires emulated tracks. ' + 'See https://git.io/vMpjB');
+ } // listen for fullscreenchange events for this player so that we
+ // can adjust our quality selection quickly
+
+ this.on(document, ['fullscreenchange', 'webkitfullscreenchange', 'mozfullscreenchange', 'MSFullscreenChange'], event => {
+ const fullscreenElement = document.fullscreenElement || document.webkitFullscreenElement || document.mozFullScreenElement || document.msFullscreenElement;
+ if (fullscreenElement && fullscreenElement.contains(this.tech_.el())) {
+ this.playlistController_.fastQualityChange_();
+ } else {
+ // When leaving fullscreen, since the in page pixel dimensions should be smaller
+ // than full screen, see if there should be a rendition switch down to preserve
+ // bandwidth.
+ this.playlistController_.checkABR_();
+ }
+ });
+ this.on(this.tech_, 'seeking', function () {
+ if (this.ignoreNextSeekingEvent_) {
+ this.ignoreNextSeekingEvent_ = false;
+ return;
+ }
+ this.setCurrentTime(this.tech_.currentTime());
+ });
+ this.on(this.tech_, 'error', function () {
+ // verify that the error was real and we are loaded
+ // enough to have pc loaded.
+ if (this.tech_.error() && this.playlistController_) {
+ this.playlistController_.pauseLoading();
+ }
+ });
+ this.on(this.tech_, 'play', this.play);
+ }
+ /**
+ * Set VHS options based on options from configuration, as well as partial
+ * options to be passed at a later time.
+ *
+ * @param {Object} options A partial chunk of config options
+ */
+
+ setOptions_(options = {}) {
+ this.options_ = merge(this.options_, options); // defaults
+
+ this.options_.withCredentials = this.options_.withCredentials || false;
+ this.options_.limitRenditionByPlayerDimensions = this.options_.limitRenditionByPlayerDimensions === false ? false : true;
+ this.options_.useDevicePixelRatio = this.options_.useDevicePixelRatio || false;
+ this.options_.useBandwidthFromLocalStorage = typeof this.source_.useBandwidthFromLocalStorage !== 'undefined' ? this.source_.useBandwidthFromLocalStorage : this.options_.useBandwidthFromLocalStorage || false;
+ this.options_.useForcedSubtitles = this.options_.useForcedSubtitles || false;
+ this.options_.useNetworkInformationApi = this.options_.useNetworkInformationApi || false;
+ this.options_.useDtsForTimestampOffset = this.options_.useDtsForTimestampOffset || false;
+ this.options_.customTagParsers = this.options_.customTagParsers || [];
+ this.options_.customTagMappers = this.options_.customTagMappers || [];
+ this.options_.cacheEncryptionKeys = this.options_.cacheEncryptionKeys || false;
+ this.options_.llhls = this.options_.llhls === false ? false : true;
+ this.options_.bufferBasedABR = this.options_.bufferBasedABR || false;
+ if (typeof this.options_.playlistExclusionDuration !== 'number') {
+ this.options_.playlistExclusionDuration = 60;
+ }
+ if (typeof this.options_.bandwidth !== 'number') {
+ if (this.options_.useBandwidthFromLocalStorage) {
+ const storedObject = getVhsLocalStorage();
+ if (storedObject && storedObject.bandwidth) {
+ this.options_.bandwidth = storedObject.bandwidth;
+ this.tech_.trigger({
+ type: 'usage',
+ name: 'vhs-bandwidth-from-local-storage'
+ });
+ }
+ if (storedObject && storedObject.throughput) {
+ this.options_.throughput = storedObject.throughput;
+ this.tech_.trigger({
+ type: 'usage',
+ name: 'vhs-throughput-from-local-storage'
+ });
+ }
+ }
+ } // if bandwidth was not set by options or pulled from local storage, start playlist
+ // selection at a reasonable bandwidth
+
+ if (typeof this.options_.bandwidth !== 'number') {
+ this.options_.bandwidth = Config.INITIAL_BANDWIDTH;
+ } // If the bandwidth number is unchanged from the initial setting
+ // then this takes precedence over the enableLowInitialPlaylist option
+
+ this.options_.enableLowInitialPlaylist = this.options_.enableLowInitialPlaylist && this.options_.bandwidth === Config.INITIAL_BANDWIDTH; // grab options passed to player.src
+
+ ['withCredentials', 'useDevicePixelRatio', 'customPixelRatio', 'limitRenditionByPlayerDimensions', 'bandwidth', 'customTagParsers', 'customTagMappers', 'cacheEncryptionKeys', 'playlistSelector', 'initialPlaylistSelector', 'bufferBasedABR', 'liveRangeSafeTimeDelta', 'llhls', 'useForcedSubtitles', 'useNetworkInformationApi', 'useDtsForTimestampOffset', 'exactManifestTimings', 'leastPixelDiffSelector'].forEach(option => {
+ if (typeof this.source_[option] !== 'undefined') {
+ this.options_[option] = this.source_[option];
+ }
+ });
+ this.limitRenditionByPlayerDimensions = this.options_.limitRenditionByPlayerDimensions;
+ this.useDevicePixelRatio = this.options_.useDevicePixelRatio;
+ const customPixelRatio = this.options_.customPixelRatio; // Ensure the custom pixel ratio is a number greater than or equal to 0
+
+ if (typeof customPixelRatio === 'number' && customPixelRatio >= 0) {
+ this.customPixelRatio = customPixelRatio;
+ }
+ } // alias for public method to set options
+
+ setOptions(options = {}) {
+ this.setOptions_(options);
+ }
+ /**
+ * called when player.src gets called, handle a new source
+ *
+ * @param {Object} src the source object to handle
+ */
+
+ src(src, type) {
+ // do nothing if the src is falsey
+ if (!src) {
+ return;
+ }
+ this.setOptions_(); // add main playlist controller options
+
+ this.options_.src = expandDataUri(this.source_.src);
+ this.options_.tech = this.tech_;
+ this.options_.externVhs = Vhs;
+ this.options_.sourceType = simpleTypeFromSourceType(type); // Whenever we seek internally, we should update the tech
+
+ this.options_.seekTo = time => {
+ this.tech_.setCurrentTime(time);
+ };
+ this.playlistController_ = new PlaylistController(this.options_);
+ const playbackWatcherOptions = merge({
+ liveRangeSafeTimeDelta: SAFE_TIME_DELTA
+ }, this.options_, {
+ seekable: () => this.seekable(),
+ media: () => this.playlistController_.media(),
+ playlistController: this.playlistController_
+ });
+ this.playbackWatcher_ = new PlaybackWatcher(playbackWatcherOptions);
+ this.playlistController_.on('error', () => {
+ const player = videojs.players[this.tech_.options_.playerId];
+ let error = this.playlistController_.error;
+ if (typeof error === 'object' && !error.code) {
+ error.code = 3;
+ } else if (typeof error === 'string') {
+ error = {
+ message: error,
+ code: 3
+ };
+ }
+ player.error(error);
+ });
+ const defaultSelector = this.options_.bufferBasedABR ? Vhs.movingAverageBandwidthSelector(0.55) : Vhs.STANDARD_PLAYLIST_SELECTOR; // `this` in selectPlaylist should be the VhsHandler for backwards
+ // compatibility with < v2
+
+ this.playlistController_.selectPlaylist = this.selectPlaylist ? this.selectPlaylist.bind(this) : defaultSelector.bind(this);
+ this.playlistController_.selectInitialPlaylist = Vhs.INITIAL_PLAYLIST_SELECTOR.bind(this); // re-expose some internal objects for backwards compatibility with < v2
+
+ this.playlists = this.playlistController_.mainPlaylistLoader_;
+ this.mediaSource = this.playlistController_.mediaSource; // Proxy assignment of some properties to the main playlist
+ // controller. Using a custom property for backwards compatibility
+ // with < v2
+
+ Object.defineProperties(this, {
+ selectPlaylist: {
+ get() {
+ return this.playlistController_.selectPlaylist;
+ },
+ set(selectPlaylist) {
+ this.playlistController_.selectPlaylist = selectPlaylist.bind(this);
+ }
+ },
+ throughput: {
+ get() {
+ return this.playlistController_.mainSegmentLoader_.throughput.rate;
+ },
+ set(throughput) {
+ this.playlistController_.mainSegmentLoader_.throughput.rate = throughput; // By setting `count` to 1 the throughput value becomes the starting value
+ // for the cumulative average
+
+ this.playlistController_.mainSegmentLoader_.throughput.count = 1;
+ }
+ },
+ bandwidth: {
+ get() {
+ let playerBandwidthEst = this.playlistController_.mainSegmentLoader_.bandwidth;
+ const networkInformation = window.navigator.connection || window.navigator.mozConnection || window.navigator.webkitConnection;
+ const tenMbpsAsBitsPerSecond = 10e6;
+ if (this.options_.useNetworkInformationApi && networkInformation) {
+ // downlink returns Mbps
+ // https://developer.mozilla.org/en-US/docs/Web/API/NetworkInformation/downlink
+ const networkInfoBandwidthEstBitsPerSec = networkInformation.downlink * 1000 * 1000; // downlink maxes out at 10 Mbps. In the event that both networkInformationApi and the player
+ // estimate a bandwidth greater than 10 Mbps, use the larger of the two estimates to ensure that
+ // high quality streams are not filtered out.
+
+ if (networkInfoBandwidthEstBitsPerSec >= tenMbpsAsBitsPerSecond && playerBandwidthEst >= tenMbpsAsBitsPerSecond) {
+ playerBandwidthEst = Math.max(playerBandwidthEst, networkInfoBandwidthEstBitsPerSec);
+ } else {
+ playerBandwidthEst = networkInfoBandwidthEstBitsPerSec;
+ }
+ }
+ return playerBandwidthEst;
+ },
+ set(bandwidth) {
+ this.playlistController_.mainSegmentLoader_.bandwidth = bandwidth; // setting the bandwidth manually resets the throughput counter
+ // `count` is set to zero that current value of `rate` isn't included
+ // in the cumulative average
+
+ this.playlistController_.mainSegmentLoader_.throughput = {
+ rate: 0,
+ count: 0
+ };
+ }
+ },
+ /**
+ * `systemBandwidth` is a combination of two serial processes bit-rates. The first
+ * is the network bitrate provided by `bandwidth` and the second is the bitrate of
+ * the entire process after that - decryption, transmuxing, and appending - provided
+ * by `throughput`.
+ *
+ * Since the two process are serial, the overall system bandwidth is given by:
+ * sysBandwidth = 1 / (1 / bandwidth + 1 / throughput)
+ */
+ systemBandwidth: {
+ get() {
+ const invBandwidth = 1 / (this.bandwidth || 1);
+ let invThroughput;
+ if (this.throughput > 0) {
+ invThroughput = 1 / this.throughput;
+ } else {
+ invThroughput = 0;
+ }
+ const systemBitrate = Math.floor(1 / (invBandwidth + invThroughput));
+ return systemBitrate;
+ },
+ set() {
+ videojs.log.error('The "systemBandwidth" property is read-only');
+ }
+ }
+ });
+ if (this.options_.bandwidth) {
+ this.bandwidth = this.options_.bandwidth;
+ }
+ if (this.options_.throughput) {
+ this.throughput = this.options_.throughput;
+ }
+ Object.defineProperties(this.stats, {
+ bandwidth: {
+ get: () => this.bandwidth || 0,
+ enumerable: true
+ },
+ mediaRequests: {
+ get: () => this.playlistController_.mediaRequests_() || 0,
+ enumerable: true
+ },
+ mediaRequestsAborted: {
+ get: () => this.playlistController_.mediaRequestsAborted_() || 0,
+ enumerable: true
+ },
+ mediaRequestsTimedout: {
+ get: () => this.playlistController_.mediaRequestsTimedout_() || 0,
+ enumerable: true
+ },
+ mediaRequestsErrored: {
+ get: () => this.playlistController_.mediaRequestsErrored_() || 0,
+ enumerable: true
+ },
+ mediaTransferDuration: {
+ get: () => this.playlistController_.mediaTransferDuration_() || 0,
+ enumerable: true
+ },
+ mediaBytesTransferred: {
+ get: () => this.playlistController_.mediaBytesTransferred_() || 0,
+ enumerable: true
+ },
+ mediaSecondsLoaded: {
+ get: () => this.playlistController_.mediaSecondsLoaded_() || 0,
+ enumerable: true
+ },
+ mediaAppends: {
+ get: () => this.playlistController_.mediaAppends_() || 0,
+ enumerable: true
+ },
+ mainAppendsToLoadedData: {
+ get: () => this.playlistController_.mainAppendsToLoadedData_() || 0,
+ enumerable: true
+ },
+ audioAppendsToLoadedData: {
+ get: () => this.playlistController_.audioAppendsToLoadedData_() || 0,
+ enumerable: true
+ },
+ appendsToLoadedData: {
+ get: () => this.playlistController_.appendsToLoadedData_() || 0,
+ enumerable: true
+ },
+ timeToLoadedData: {
+ get: () => this.playlistController_.timeToLoadedData_() || 0,
+ enumerable: true
+ },
+ buffered: {
+ get: () => timeRangesToArray(this.tech_.buffered()),
+ enumerable: true
+ },
+ currentTime: {
+ get: () => this.tech_.currentTime(),
+ enumerable: true
+ },
+ currentSource: {
+ get: () => this.tech_.currentSource_,
+ enumerable: true
+ },
+ currentTech: {
+ get: () => this.tech_.name_,
+ enumerable: true
+ },
+ duration: {
+ get: () => this.tech_.duration(),
+ enumerable: true
+ },
+ main: {
+ get: () => this.playlists.main,
+ enumerable: true
+ },
+ playerDimensions: {
+ get: () => this.tech_.currentDimensions(),
+ enumerable: true
+ },
+ seekable: {
+ get: () => timeRangesToArray(this.tech_.seekable()),
+ enumerable: true
+ },
+ timestamp: {
+ get: () => Date.now(),
+ enumerable: true
+ },
+ videoPlaybackQuality: {
+ get: () => this.tech_.getVideoPlaybackQuality(),
+ enumerable: true
+ }
+ });
+ this.tech_.one('canplay', this.playlistController_.setupFirstPlay.bind(this.playlistController_));
+ this.tech_.on('bandwidthupdate', () => {
+ if (this.options_.useBandwidthFromLocalStorage) {
+ updateVhsLocalStorage({
+ bandwidth: this.bandwidth,
+ throughput: Math.round(this.throughput)
+ });
+ }
+ });
+ this.playlistController_.on('selectedinitialmedia', () => {
+ // Add the manual rendition mix-in to VhsHandler
+ renditionSelectionMixin(this);
+ });
+ this.playlistController_.sourceUpdater_.on('createdsourcebuffers', () => {
+ this.setupEme_();
+ }); // the bandwidth of the primary segment loader is our best
+ // estimate of overall bandwidth
+
+ this.on(this.playlistController_, 'progress', function () {
+ this.tech_.trigger('progress');
+ }); // In the live case, we need to ignore the very first `seeking` event since
+ // that will be the result of the seek-to-live behavior
+
+ this.on(this.playlistController_, 'firstplay', function () {
+ this.ignoreNextSeekingEvent_ = true;
+ });
+ this.setupQualityLevels_(); // do nothing if the tech has been disposed already
+ // this can occur if someone sets the src in player.ready(), for instance
+
+ if (!this.tech_.el()) {
+ return;
+ }
+ this.mediaSourceUrl_ = window.URL.createObjectURL(this.playlistController_.mediaSource);
+ this.tech_.src(this.mediaSourceUrl_);
+ }
+ createKeySessions_() {
+ const audioPlaylistLoader = this.playlistController_.mediaTypes_.AUDIO.activePlaylistLoader;
+ this.logger_('waiting for EME key session creation');
+ waitForKeySessionCreation({
+ player: this.player_,
+ sourceKeySystems: this.source_.keySystems,
+ audioMedia: audioPlaylistLoader && audioPlaylistLoader.media(),
+ mainPlaylists: this.playlists.main.playlists
+ }).then(() => {
+ this.logger_('created EME key session');
+ this.playlistController_.sourceUpdater_.initializedEme();
+ }).catch(err => {
+ this.logger_('error while creating EME key session', err);
+ this.player_.error({
+ message: 'Failed to initialize media keys for EME',
+ code: 3,
+ metadata: {
+ errorType: videojs.Error.EMEKeySessionCreationError
+ }
+ });
+ });
+ }
+ handleWaitingForKey_() {
+ // If waitingforkey is fired, it's possible that the data that's necessary to retrieve
+ // the key is in the manifest. While this should've happened on initial source load, it
+ // may happen again in live streams where the keys change, and the manifest info
+ // reflects the update.
+ //
+ // Because videojs-contrib-eme compares the PSSH data we send to that of PSSH data it's
+ // already requested keys for, we don't have to worry about this generating extraneous
+ // requests.
+ this.logger_('waitingforkey fired, attempting to create any new key sessions');
+ this.createKeySessions_();
+ }
+ /**
+ * If necessary and EME is available, sets up EME options and waits for key session
+ * creation.
+ *
+ * This function also updates the source updater so taht it can be used, as for some
+ * browsers, EME must be configured before content is appended (if appending unencrypted
+ * content before encrypted content).
+ */
+
+ setupEme_() {
+ const audioPlaylistLoader = this.playlistController_.mediaTypes_.AUDIO.activePlaylistLoader;
+ const didSetupEmeOptions = setupEmeOptions({
+ player: this.player_,
+ sourceKeySystems: this.source_.keySystems,
+ media: this.playlists.media(),
+ audioMedia: audioPlaylistLoader && audioPlaylistLoader.media()
+ });
+ this.player_.tech_.on('keystatuschange', e => {
+ this.playlistController_.updatePlaylistByKeyStatus(e.keyId, e.status);
+ });
+ this.handleWaitingForKey_ = this.handleWaitingForKey_.bind(this);
+ this.player_.tech_.on('waitingforkey', this.handleWaitingForKey_);
+ if (!didSetupEmeOptions) {
+ // If EME options were not set up, we've done all we could to initialize EME.
+ this.playlistController_.sourceUpdater_.initializedEme();
+ return;
+ }
+ this.createKeySessions_();
+ }
+ /**
+ * Initializes the quality levels and sets listeners to update them.
+ *
+ * @method setupQualityLevels_
+ * @private
+ */
+
+ setupQualityLevels_() {
+ const player = videojs.players[this.tech_.options_.playerId]; // if there isn't a player or there isn't a qualityLevels plugin
+ // or qualityLevels_ listeners have already been setup, do nothing.
+
+ if (!player || !player.qualityLevels || this.qualityLevels_) {
+ return;
+ }
+ this.qualityLevels_ = player.qualityLevels();
+ this.playlistController_.on('selectedinitialmedia', () => {
+ handleVhsLoadedMetadata(this.qualityLevels_, this);
+ });
+ this.playlists.on('mediachange', () => {
+ handleVhsMediaChange(this.qualityLevels_, this.playlists);
+ });
+ }
+ /**
+ * return the version
+ */
+
+ static version() {
+ return {
+ '@videojs/http-streaming': version$4,
+ 'mux.js': version$3,
+ 'mpd-parser': version$2,
+ 'm3u8-parser': version$1,
+ 'aes-decrypter': version
+ };
+ }
+ /**
+ * return the version
+ */
+
+ version() {
+ return this.constructor.version();
+ }
+ canChangeType() {
+ return SourceUpdater.canChangeType();
+ }
+ /**
+ * Begin playing the video.
+ */
+
+ play() {
+ this.playlistController_.play();
+ }
+ /**
+ * a wrapper around the function in PlaylistController
+ */
+
+ setCurrentTime(currentTime) {
+ this.playlistController_.setCurrentTime(currentTime);
+ }
+ /**
+ * a wrapper around the function in PlaylistController
+ */
+
+ duration() {
+ return this.playlistController_.duration();
+ }
+ /**
+ * a wrapper around the function in PlaylistController
+ */
+
+ seekable() {
+ return this.playlistController_.seekable();
+ }
+ /**
+ * Abort all outstanding work and cleanup.
+ */
+
+ dispose() {
+ if (this.playbackWatcher_) {
+ this.playbackWatcher_.dispose();
+ }
+ if (this.playlistController_) {
+ this.playlistController_.dispose();
+ }
+ if (this.qualityLevels_) {
+ this.qualityLevels_.dispose();
+ }
+ if (this.tech_ && this.tech_.vhs) {
+ delete this.tech_.vhs;
+ }
+ if (this.mediaSourceUrl_ && window.URL.revokeObjectURL) {
+ window.URL.revokeObjectURL(this.mediaSourceUrl_);
+ this.mediaSourceUrl_ = null;
+ }
+ if (this.tech_) {
+ this.tech_.off('waitingforkey', this.handleWaitingForKey_);
+ }
+ super.dispose();
+ }
+ convertToProgramTime(time, callback) {
+ return getProgramTime({
+ playlist: this.playlistController_.media(),
+ time,
+ callback
+ });
+ } // the player must be playing before calling this
+
+ seekToProgramTime(programTime, callback, pauseAfterSeek = true, retryCount = 2) {
+ return seekToProgramTime({
+ programTime,
+ playlist: this.playlistController_.media(),
+ retryCount,
+ pauseAfterSeek,
+ seekTo: this.options_.seekTo,
+ tech: this.options_.tech,
+ callback
+ });
+ }
+ /**
+ * Adds the onRequest, onResponse, offRequest and offResponse functions
+ * to the VhsHandler xhr Object.
+ */
+
+ setupXhrHooks_() {
+ /**
+ * A player function for setting an onRequest hook
+ *
+ * @param {function} callback for request modifiction
+ */
+ this.xhr.onRequest = callback => {
+ addOnRequestHook(this.xhr, callback);
+ };
+ /**
+ * A player function for setting an onResponse hook
+ *
+ * @param {callback} callback for response data retrieval
+ */
+
+ this.xhr.onResponse = callback => {
+ addOnResponseHook(this.xhr, callback);
+ };
+ /**
+ * Deletes a player onRequest callback if it exists
+ *
+ * @param {function} callback to delete from the player set
+ */
+
+ this.xhr.offRequest = callback => {
+ removeOnRequestHook(this.xhr, callback);
+ };
+ /**
+ * Deletes a player onResponse callback if it exists
+ *
+ * @param {function} callback to delete from the player set
+ */
+
+ this.xhr.offResponse = callback => {
+ removeOnResponseHook(this.xhr, callback);
+ }; // Trigger an event on the player to notify the user that vhs is ready to set xhr hooks.
+ // This allows hooks to be set before the source is set to vhs when handleSource is called.
+
+ this.player_.trigger('xhr-hooks-ready');
+ }
+ }
+ /**
+ * The Source Handler object, which informs video.js what additional
+ * MIME types are supported and sets up playback. It is registered
+ * automatically to the appropriate tech based on the capabilities of
+ * the browser it is running in. It is not necessary to use or modify
+ * this object in normal usage.
+ */
+
+ const VhsSourceHandler = {
+ name: 'videojs-http-streaming',
+ VERSION: version$4,
+ canHandleSource(srcObj, options = {}) {
+ const localOptions = merge(videojs.options, options);
+ return VhsSourceHandler.canPlayType(srcObj.type, localOptions);
+ },
+ handleSource(source, tech, options = {}) {
+ const localOptions = merge(videojs.options, options);
+ tech.vhs = new VhsHandler(source, tech, localOptions);
+ tech.vhs.xhr = xhrFactory();
+ tech.vhs.setupXhrHooks_();
+ tech.vhs.src(source.src, source.type);
+ return tech.vhs;
+ },
+ canPlayType(type, options) {
+ const simpleType = simpleTypeFromSourceType(type);
+ if (!simpleType) {
+ return '';
+ }
+ const overrideNative = VhsSourceHandler.getOverrideNative(options);
+ const supportsTypeNatively = Vhs.supportsTypeNatively(simpleType);
+ const canUseMsePlayback = !supportsTypeNatively || overrideNative;
+ return canUseMsePlayback ? 'maybe' : '';
+ },
+ getOverrideNative(options = {}) {
+ const {
+ vhs = {}
+ } = options;
+ const defaultOverrideNative = !(videojs.browser.IS_ANY_SAFARI || videojs.browser.IS_IOS);
+ const {
+ overrideNative = defaultOverrideNative
+ } = vhs;
+ return overrideNative;
+ }
+ };
+ /**
+ * Check to see if the native MediaSource object exists and supports
+ * an MP4 container with both H.264 video and AAC-LC audio.
+ *
+ * @return {boolean} if native media sources are supported
+ */
+
+ const supportsNativeMediaSources = () => {
+ return browserSupportsCodec('avc1.4d400d,mp4a.40.2');
+ }; // register source handlers with the appropriate techs
+
+ if (supportsNativeMediaSources()) {
+ videojs.getTech('Html5').registerSourceHandler(VhsSourceHandler, 0);
+ }
+ videojs.VhsHandler = VhsHandler;
+ videojs.VhsSourceHandler = VhsSourceHandler;
+ videojs.Vhs = Vhs;
+ if (!videojs.use) {
+ videojs.registerComponent('Vhs', Vhs);
+ }
+ videojs.options.vhs = videojs.options.vhs || {};
+ if (!videojs.getPlugin || !videojs.getPlugin('reloadSourceOnError')) {
+ videojs.registerPlugin('reloadSourceOnError', reloadSourceOnError);
+ }
+
+ videojs.DomData = DomData;
+ videojs.log.level('debug');
+
+ return videojs;
+
+}));
generated by cgit v1.2.3-57-g22cb (git 2.39.0) at 2024-11-22 09:34:16 +0000