/*! @license * Shaka Player * Copyright 2016 Google LLC * SPDX-License-Identifier: Apache-2.0 */goog.provide('shaka.Player');goog.require('goog.asserts');goog.require('shaka.config.AutoShowText');goog.require('shaka.Deprecate');goog.require('shaka.log');goog.require('shaka.media.AdaptationSetCriteria');goog.require('shaka.media.BufferingObserver');goog.require('shaka.media.DrmEngine');goog.require('shaka.media.ExampleBasedCriteria');goog.require('shaka.media.ManifestFilterer');goog.require('shaka.media.ManifestParser');goog.require('shaka.media.MediaSourceEngine');goog.require('shaka.media.MediaSourcePlayhead');goog.require('shaka.media.MetaSegmentIndex');goog.require('shaka.media.PlayRateController');goog.require('shaka.media.Playhead');goog.require('shaka.media.PlayheadObserverManager');goog.require('shaka.media.PreferenceBasedCriteria');goog.require('shaka.media.PreloadManager');goog.require('shaka.media.QualityObserver');goog.require('shaka.media.RegionObserver');goog.require('shaka.media.RegionTimeline');goog.require('shaka.media.SegmentIndex');goog.require('shaka.media.SegmentPrefetch');goog.require('shaka.media.SegmentReference');goog.require('shaka.media.SrcEqualsPlayhead');goog.require('shaka.media.StreamingEngine');goog.require('shaka.media.TimeRangesUtils');goog.require('shaka.net.NetworkingEngine');goog.require('shaka.net.NetworkingUtils');goog.require('shaka.text.SimpleTextDisplayer');goog.require('shaka.text.StubTextDisplayer');goog.require('shaka.text.TextEngine');goog.require('shaka.text.UITextDisplayer');goog.require('shaka.text.WebVttGenerator');goog.require('shaka.util.BufferUtils');goog.require('shaka.util.CmcdManager');goog.require('shaka.util.CmsdManager');goog.require('shaka.util.ConfigUtils');goog.require('shaka.util.Dom');goog.require('shaka.util.Error');goog.require('shaka.util.EventManager');goog.require('shaka.util.FakeEvent');goog.require('shaka.util.FakeEventTarget');goog.require('shaka.util.IDestroyable');goog.require('shaka.util.LanguageUtils');goog.require('shaka.util.ManifestParserUtils');goog.require('shaka.util.MediaReadyState');goog.require('shaka.util.MimeUtils');goog.require('shaka.util.Mutex');goog.require('shaka.util.ObjectUtils');goog.require('shaka.util.Platform');goog.require('shaka.util.PlayerConfiguration');goog.require('shaka.util.PublicPromise');goog.require('shaka.util.Stats');goog.require('shaka.util.StreamUtils');goog.require('shaka.util.Timer');goog.require('shaka.lcevc.Dec');goog.requireType('shaka.media.PresentationTimeline');/** * @event shaka.Player.ErrorEvent * @description Fired when a playback error occurs. * @property {string} type * 'error' * @property {!shaka.util.Error} detail * An object which contains details on the error. The error's * <code>category</code> and <code>code</code> properties will identify the * specific error that occurred. In an uncompiled build, you can also use the * <code>message</code> and <code>stack</code> properties to debug. * @exportDoc *//** * @event shaka.Player.StateChangeEvent * @description Fired when the player changes load states. * @property {string} type * 'onstatechange' * @property {string} state * The name of the state that the player just entered. * @exportDoc *//** * @event shaka.Player.EmsgEvent * @description Fired when an emsg box is found in a segment. * If the application calls preventDefault() on this event, further parsing * will not happen, and no 'metadata' event will be raised for ID3 payloads. * @property {string} type * 'emsg' * @property {shaka.extern.EmsgInfo} detail * An object which contains the content of the emsg box. * @exportDoc *//** * @event shaka.Player.DownloadFailed * @description Fired when a download has failed, for any reason. * 'downloadfailed' * @property {!shaka.extern.Request} request * @property {?shaka.util.Error} error * @param {number} httpResponseCode * @param {boolean} aborted * @exportDoc *//** * @event shaka.Player.DownloadHeadersReceived * @description Fired when the networking engine has received the headers for * a download, but before the body has been downloaded. * If the HTTP plugin being used does not track this information, this event * will default to being fired when the body is received, instead. * @property {!Object.<string, string>} headers * @property {!shaka.extern.Request} request * @property {!shaka.net.NetworkingEngine.RequestType} type * 'downloadheadersreceived' * @exportDoc *//** * @event shaka.Player.DrmSessionUpdateEvent * @description Fired when the CDM has accepted the license response. * @property {string} type * 'drmsessionupdate' * @exportDoc *//** * @event shaka.Player.TimelineRegionAddedEvent * @description Fired when a media timeline region is added. * @property {string} type * 'timelineregionadded' * @property {shaka.extern.TimelineRegionInfo} detail * An object which contains a description of the region. * @exportDoc *//** * @event shaka.Player.TimelineRegionEnterEvent * @description Fired when the playhead enters a timeline region. * @property {string} type * 'timelineregionenter' * @property {shaka.extern.TimelineRegionInfo} detail * An object which contains a description of the region. * @exportDoc *//** * @event shaka.Player.TimelineRegionExitEvent * @description Fired when the playhead exits a timeline region. * @property {string} type * 'timelineregionexit' * @property {shaka.extern.TimelineRegionInfo} detail * An object which contains a description of the region. * @exportDoc *//** * @event shaka.Player.MediaQualityChangedEvent * @description Fired when the media quality changes at the playhead. * That may be caused by an adaptation change or a DASH period transition. * Separate events are emitted for audio and video contentTypes. * @property {string} type * 'mediaqualitychanged' * @property {shaka.extern.MediaQualityInfo} mediaQuality * Information about media quality at the playhead position. * @property {number} position * The playhead position. * @exportDoc *//** * @event shaka.Player.AudioTrackChangedEvent * @description Fired when the audio track changes at the playhead. * That may be caused by a user requesting to chang audio tracks. * @property {string} type * 'audiotrackchanged' * @property {shaka.extern.MediaQualityInfo} mediaQuality * Information about media quality at the playhead position. * @property {number} position * The playhead position. * @exportDoc *//** * @event shaka.Player.BufferingEvent * @description Fired when the player's buffering state changes. * @property {string} type * 'buffering' * @property {boolean} buffering * True when the Player enters the buffering state. * False when the Player leaves the buffering state. * @exportDoc *//** * @event shaka.Player.LoadingEvent * @description Fired when the player begins loading. The start of loading is * defined as when the user has communicated intent to load content (i.e. * <code>Player.load</code> has been called). * @property {string} type * 'loading' * @exportDoc *//** * @event shaka.Player.LoadedEvent * @description Fired when the player ends the load. * @property {string} type * 'loaded' * @exportDoc *//** * @event shaka.Player.UnloadingEvent * @description Fired when the player unloads or fails to load. * Used by the Cast receiver to determine idle state. * @property {string} type * 'unloading' * @exportDoc *//** * @event shaka.Player.TextTrackVisibilityEvent * @description Fired when text track visibility changes. * @property {string} type * 'texttrackvisibility' * @exportDoc *//** * @event shaka.Player.TracksChangedEvent * @description Fired when the list of tracks changes. For example, this will * happen when new tracks are added/removed or when track restrictions change. * @property {string} type * 'trackschanged' * @exportDoc *//** * @event shaka.Player.AdaptationEvent * @description Fired when an automatic adaptation causes the active tracks * to change. Does not fire when the application calls * <code>selectVariantTrack()</code>, <code>selectTextTrack()</code>, * <code>selectAudioLanguage()</code>, or <code>selectTextLanguage()</code>. * @property {string} type * 'adaptation' * @property {shaka.extern.Track} oldTrack * @property {shaka.extern.Track} newTrack * @exportDoc *//** * @event shaka.Player.VariantChangedEvent * @description Fired when a call from the application caused a variant change. * Can be triggered by calls to <code>selectVariantTrack()</code> or * <code>selectAudioLanguage()</code>. Does not fire when an automatic * adaptation causes a variant change. * @property {string} type * 'variantchanged' * @property {shaka.extern.Track} oldTrack * @property {shaka.extern.Track} newTrack * @exportDoc *//** * @event shaka.Player.TextChangedEvent * @description Fired when a call from the application caused a text stream * change. Can be triggered by calls to <code>selectTextTrack()</code> or * <code>selectTextLanguage()</code>. * @property {string} type * 'textchanged' * @exportDoc *//** * @event shaka.Player.ExpirationUpdatedEvent * @description Fired when there is a change in the expiration times of an * EME session. * @property {string} type * 'expirationupdated' * @exportDoc *//** * @event shaka.Player.ManifestParsedEvent * @description Fired after the manifest has been parsed, but before anything * else happens. The manifest may contain streams that will be filtered out, * at this stage of the loading process. * @property {string} type * 'manifestparsed' * @exportDoc *//** * @event shaka.Player.ManifestUpdatedEvent * @description Fired after the manifest has been updated (live streams). * @property {string} type * 'manifestupdated' * @property {boolean} isLive * True when the playlist is live. Useful to detect transition from live * to static playlist.. * @exportDoc *//** * @event shaka.Player.MetadataEvent * @description Triggers after metadata associated with the stream is found. * Usually they are metadata of type ID3. * @property {string} type * 'metadata' * @property {number} startTime * The time that describes the beginning of the range of the metadata to * which the cue applies. * @property {?number} endTime * The time that describes the end of the range of the metadata to which * the cue applies. * @property {string} metadataType * Type of metadata. Eg: 'org.id3' or 'com.apple.quicktime.HLS' * @property {shaka.extern.MetadataFrame} payload * The metadata itself * @exportDoc *//** * @event shaka.Player.StreamingEvent * @description Fired after the manifest has been parsed and track information * is available, but before streams have been chosen and before any segments * have been fetched. You may use this event to configure the player based on * information found in the manifest. * @property {string} type * 'streaming' * @exportDoc *//** * @event shaka.Player.AbrStatusChangedEvent * @description Fired when the state of abr has been changed. * (Enabled or disabled). * @property {string} type * 'abrstatuschanged' * @property {boolean} newStatus * The new status of the application. True for 'is enabled' and * false otherwise. * @exportDoc *//** * @event shaka.Player.RateChangeEvent * @description Fired when the video's playback rate changes. * This allows the PlayRateController to update it's internal rate field, * before the UI updates playback button with the newest playback rate. * @property {string} type * 'ratechange' * @exportDoc *//** * @event shaka.Player.SegmentAppended * @description Fired when a segment is appended to the media element. * @property {string} type * 'segmentappended' * @property {number} start * The start time of the segment. * @property {number} end * The end time of the segment. * @property {string} contentType * The content type of the segment. E.g. 'video', 'audio', or 'text'. * @property {boolean} isMuxed * Indicates if the segment is muxed (audio + video). * @exportDoc *//** * @event shaka.Player.SessionDataEvent * @description Fired when the manifest parser find info about session data. * Specification: https://tools.ietf.org/html/rfc8216#section-4.3.4.4 * @property {string} type * 'sessiondata' * @property {string} id * The id of the session data. * @property {string} uri * The uri with the session data info. * @property {string} language * The language of the session data. * @property {string} value * The value of the session data. * @exportDoc *//** * @event shaka.Player.StallDetectedEvent * @description Fired when a stall in playback is detected by the StallDetector. * Not all stalls are caused by gaps in the buffered ranges. * @property {string} type * 'stalldetected' * @exportDoc *//** * @event shaka.Player.GapJumpedEvent * @description Fired when the GapJumpingController jumps over a gap in the * buffered ranges. * @property {string} type * 'gapjumped' * @exportDoc *//** * @event shaka.Player.KeyStatusChanged * @description Fired when the key status changed. * @property {string} type * 'keystatuschanged' * @exportDoc *//** * @event shaka.Player.StateChanged * @description Fired when player state is changed. * @property {string} type * 'statechanged' * @property {string} newstate * The new state. * @exportDoc *//** * @event shaka.Player.Started * @description Fires when the content starts playing. * Only for VoD. * @property {string} type * 'started' * @exportDoc *//** * @event shaka.Player.FirstQuartile * @description Fires when the content playhead crosses first quartile. * Only for VoD. * @property {string} type * 'firstquartile' * @exportDoc *//** * @event shaka.Player.Midpoint * @description Fires when the content playhead crosses midpoint. * Only for VoD. * @property {string} type * 'midpoint' * @exportDoc *//** * @event shaka.Player.ThirdQuartile * @description Fires when the content playhead crosses third quartile. * Only for VoD. * @property {string} type * 'thirdquartile' * @exportDoc *//** * @event shaka.Player.Complete * @description Fires when the content completes playing. * Only for VoD. * @property {string} type * 'complete' * @exportDoc *//** * @event shaka.Player.SpatialVideoInfoEvent * @description Fired when the video has spatial video info. If a previous * event was fired, this include the new info. * @property {string} type * 'spatialvideoinfo' * @property {shaka.extern.SpatialVideoInfo} detail * An object which contains the content of the emsg box. * @exportDoc *//** * @event shaka.Player.NoSpatialVideoInfoEvent * @description Fired when the video no longer has spatial video information. * For it to be fired, the shaka.Player.SpatialVideoInfoEvent event must * have been previously fired. * @property {string} type * 'nospatialvideoinfo' * @exportDoc *//** * @summary The main player object for Shaka Player. * * @implements {shaka.util.IDestroyable} * @export */shaka.Player = class extends shaka.util.FakeEventTarget { /** * @param {HTMLMediaElement=} mediaElement * When provided, the player will attach to <code>mediaElement</code>, * similar to calling <code>attach</code>. When not provided, the player * will remain detached. * @param {function(shaka.Player)=} dependencyInjector Optional callback * which is called to inject mocks into the Player. Used for testing. */ constructor(mediaElement, dependencyInjector) { super(); /** @private {shaka.Player.LoadMode} */ this.loadMode_ = shaka.Player.LoadMode.NOT_LOADED; /** @private {HTMLMediaElement} */ this.video_ = null; /** @private {HTMLElement} */ this.videoContainer_ = null; /** * Since we may not always have a text displayer created (e.g. before |load| * is called), we need to track what text visibility SHOULD be so that we * can ensure that when we create the text displayer. When we create our * text displayer, we will use this to show (or not show) text as per the * user's requests. * * @private {boolean} */ this.isTextVisible_ = false; /** * For listeners scoped to the lifetime of the Player instance. * @private {shaka.util.EventManager} */ this.globalEventManager_ = new shaka.util.EventManager(); /** * For listeners scoped to the lifetime of the media element attachment. * @private {shaka.util.EventManager} */ this.attachEventManager_ = new shaka.util.EventManager(); /** * For listeners scoped to the lifetime of the loaded content. * @private {shaka.util.EventManager} */ this.loadEventManager_ = new shaka.util.EventManager(); /** * For listeners scoped to the lifetime of the loaded content. * @private {shaka.util.EventManager} */ this.trickPlayEventManager_ = new shaka.util.EventManager(); /** * For listeners scoped to the lifetime of the ad manager. * @private {shaka.util.EventManager} */ this.adManagerEventManager_ = new shaka.util.EventManager(); /** @private {shaka.net.NetworkingEngine} */ this.networkingEngine_ = null; /** @private {shaka.media.DrmEngine} */ this.drmEngine_ = null; /** @private {shaka.media.MediaSourceEngine} */ this.mediaSourceEngine_ = null; /** @private {shaka.media.Playhead} */ this.playhead_ = null; /** * Incremented whenever a top-level operation (load, attach, etc) is * performed. * Used to determine if a load operation has been interrupted. * @private {number} */ this.operationId_ = 0; /** @private {!shaka.util.Mutex} */ this.mutex_ = new shaka.util.Mutex(); /** * The playhead observers are used to monitor the position of the playhead * and some other source of data (e.g. buffered content), and raise events. * * @private {shaka.media.PlayheadObserverManager} */ this.playheadObservers_ = null; /** * This is our control over the playback rate of the media element. This * provides the missing functionality that we need to provide trick play, * for example a negative playback rate. * * @private {shaka.media.PlayRateController} */ this.playRateController_ = null; // We use the buffering observer and timer to track when we move from having // enough buffered content to not enough. They only exist when content has // been loaded and are not re-used between loads. /** @private {shaka.util.Timer} */ this.bufferPoller_ = null; /** @private {shaka.media.BufferingObserver} */ this.bufferObserver_ = null; /** @private {shaka.media.RegionTimeline} */ this.regionTimeline_ = null; /** @private {shaka.util.CmcdManager} */ this.cmcdManager_ = null; /** @private {shaka.util.CmsdManager} */ this.cmsdManager_ = null; // This is the canvas element that will be used for rendering LCEVC // enhanced frames. /** @private {?HTMLCanvasElement} */ this.lcevcCanvas_ = null; // This is the LCEVC Decoder object to decode LCEVC. /** @private {?shaka.lcevc.Dec} */ this.lcevcDec_ = null; /** @private {shaka.media.QualityObserver} */ this.qualityObserver_ = null; /** @private {shaka.media.StreamingEngine} */ this.streamingEngine_ = null; /** @private {shaka.extern.ManifestParser} */ this.parser_ = null; /** @private {?shaka.extern.ManifestParser.Factory} */ this.parserFactory_ = null; /** @private {?shaka.extern.Manifest} */ this.manifest_ = null; /** @private {?string} */ this.assetUri_ = null; /** @private {?string} */ this.mimeType_ = null; /** @private {?number} */ this.startTime_ = null; /** @private {boolean} */ this.fullyLoaded_ = false; /** @private {shaka.extern.AbrManager} */ this.abrManager_ = null; /** * The factory that was used to create the abrManager_ instance. * @private {?shaka.extern.AbrManager.Factory} */ this.abrManagerFactory_ = null; /** * Contains an ID for use with creating streams. The manifest parser should * start with small IDs, so this starts with a large one. * @private {number} */ this.nextExternalStreamId_ = 1e9; /** @private {!Array.<shaka.extern.Stream>} */ this.externalSrcEqualsThumbnailsStreams_ = []; /** @private {number} */ this.completionPercent_ = NaN; /** @private {?shaka.extern.PlayerConfiguration} */ this.config_ = this.defaultConfig_(); /** @private {?number} */ this.currentTargetLatency_ = null; /** @private {number} */ this.rebufferingCount_ = -1; /** @private {?number} */ this.targetLatencyReached_ = null; /** * The TextDisplayerFactory that was last used to make a text displayer. * Stored so that we can tell if a new type of text displayer is desired. * @private {?shaka.extern.TextDisplayer.Factory} */ this.lastTextFactory_; /** @private {shaka.extern.Resolution} */ this.maxHwRes_ = {width: Infinity, height: Infinity}; /** @private {!shaka.media.ManifestFilterer} */ this.manifestFilterer_ = new shaka.media.ManifestFilterer( this.config_, this.maxHwRes_, null); /** @private {!Array.<shaka.media.PreloadManager>} */ this.createdPreloadManagers_ = []; /** @private {shaka.util.Stats} */ this.stats_ = null; /** @private {!shaka.media.AdaptationSetCriteria} */ this.currentAdaptationSetCriteria_ = new shaka.media.PreferenceBasedCriteria( this.config_.preferredAudioLanguage, this.config_.preferredVariantRole, this.config_.preferredAudioChannelCount, this.config_.preferredVideoHdrLevel, this.config_.preferSpatialAudio, this.config_.preferredVideoLayout, this.config_.preferredAudioLabel, this.config_.preferredVideoLabel, this.config_.mediaSource.codecSwitchingStrategy, this.config_.manifest.dash.enableAudioGroups); /** @private {string} */ this.currentTextLanguage_ = this.config_.preferredTextLanguage; /** @private {string} */ this.currentTextRole_ = this.config_.preferredTextRole; /** @private {boolean} */ this.currentTextForced_ = this.config_.preferForcedSubs; /** @private {!Array.<function():(!Promise|undefined)>} */ this.cleanupOnUnload_ = []; if (dependencyInjector) { dependencyInjector(this); } // Create the CMCD manager so client data can be attached to all requests this.cmcdManager_ = this.createCmcd_(); this.cmsdManager_ = this.createCmsd_(); this.networkingEngine_ = this.createNetworkingEngine(); this.networkingEngine_.setForceHTTP(this.config_.streaming.forceHTTP); this.networkingEngine_.setForceHTTPS(this.config_.streaming.forceHTTPS); /** @private {shaka.extern.IAdManager} */ this.adManager_ = null; /** @private {?shaka.media.PreloadManager} */ this.preloadDueAdManager_ = null; /** @private {HTMLMediaElement} */ this.preloadDueAdManagerVideo_ = null; /** @private {boolean} */ this.preloadDueAdManagerVideoEnded_ = false; /** @private {shaka.util.Timer} */ this.preloadDueAdManagerTimer_ = new shaka.util.Timer(async () => { if (this.preloadDueAdManager_) { goog.asserts.assert(this.preloadDueAdManagerVideo_, 'Must have video'); await this.attach( this.preloadDueAdManagerVideo_, /* initializeMediaSource= */ true); await this.load(this.preloadDueAdManager_); if (!this.preloadDueAdManagerVideoEnded_) { this.preloadDueAdManagerVideo_.play(); } else { this.preloadDueAdManagerVideo_.pause(); } this.preloadDueAdManager_ = null; this.preloadDueAdManagerVideoEnded_ = false; } }); if (shaka.Player.adManagerFactory_) { this.adManager_ = shaka.Player.adManagerFactory_(); this.adManager_.configure(this.config_.ads); // Note: we don't use shaka.ads.Utils.AD_CONTENT_PAUSE_REQUESTED to // avoid add a optional module in the player. this.adManagerEventManager_.listen( this.adManager_, 'ad-content-pause-requested', async (e) => { this.preloadDueAdManagerTimer_.stop(); if (!this.preloadDueAdManager_) { this.preloadDueAdManagerVideo_ = this.video_; this.preloadDueAdManagerVideoEnded_ = this.video_.ended; const saveLivePosition = /** @type {boolean} */( e['saveLivePosition']) || false; this.preloadDueAdManager_ = await this.detachAndSavePreload( /* keepAdManager= */ true, saveLivePosition); } }); // Note: we don't use shaka.ads.Utils.AD_CONTENT_RESUME_REQUESTED to // avoid add a optional module in the player. this.adManagerEventManager_.listen( this.adManager_, 'ad-content-resume-requested', (e) => { const offset = /** @type {number} */(e['offset']) || 0; if (this.preloadDueAdManager_) { this.preloadDueAdManager_.setOffsetToStartTime(offset); } this.preloadDueAdManagerTimer_.tickAfter(0.1); }); // Note: we don't use shaka.ads.Utils.AD_CONTENT_ATTACH_REQUESTED to // avoid add a optional module in the player. this.adManagerEventManager_.listen( this.adManager_, 'ad-content-attach-requested', async (e) => { if (!this.video_ && this.preloadDueAdManagerVideo_) { goog.asserts.assert(this.preloadDueAdManagerVideo_, 'Must have video'); await this.attach(this.preloadDueAdManagerVideo_, /* initializeMediaSource= */ true); } }); } // If the browser comes back online after being offline, then try to play // again. this.globalEventManager_.listen(window, 'online', () => { this.restoreDisabledVariants_(); this.retryStreaming(); }); /** @private {shaka.util.Timer} */ this.checkVariantsTimer_ = new shaka.util.Timer(() => this.checkVariants_()); /** @private {?shaka.media.PreloadManager} */ this.preloadNextUrl_ = null; // Even though |attach| will start in later interpreter cycles, it should be // the LAST thing we do in the constructor because conceptually it relies on // player having been initialized. if (mediaElement) { shaka.Deprecate.deprecateFeature(5, 'Player w/ mediaElement', 'Please migrate from initializing Player with a mediaElement; ' + 'use the attach method instead.'); this.attach(mediaElement, /* initializeMediaSource= */ true); } } /** * Create a shaka.lcevc.Dec object * @param {shaka.extern.LcevcConfiguration} config * @private */ createLcevcDec_(config) { if (this.lcevcDec_ == null) { this.lcevcDec_ = new shaka.lcevc.Dec( /** @type {HTMLVideoElement} */ (this.video_), this.lcevcCanvas_, config, ); if (this.mediaSourceEngine_) { this.mediaSourceEngine_.updateLcevcDec(this.lcevcDec_); } } } /** * Close a shaka.lcevc.Dec object if present and hide the canvas. * @private */ closeLcevcDec_() { if (this.lcevcDec_ != null) { this.lcevcDec_.hideCanvas(); this.lcevcDec_.release(); this.lcevcDec_ = null; } } /** * Setup shaka.lcevc.Dec object * @param {?shaka.extern.PlayerConfiguration} config * @private */ setupLcevc_(config) { if (config.lcevc.enabled) { this.closeLcevcDec_(); this.createLcevcDec_(config.lcevc); } else { this.closeLcevcDec_(); } } /** * @param {!shaka.util.FakeEvent.EventName} name * @param {Map.<string, Object>=} data * @return {!shaka.util.FakeEvent} * @private */ static makeEvent_(name, data) { return new shaka.util.FakeEvent(name, data); } /** * After destruction, a Player object cannot be used again. * * @override * @export */ async destroy() { // Make sure we only execute the destroy logic once. if (this.loadMode_ == shaka.Player.LoadMode.DESTROYED) { return; } // If LCEVC Decoder exists close it. this.closeLcevcDec_(); const detachPromise = this.detach(); // Mark as "dead". This should stop external-facing calls from changing our // internal state any more. This will stop calls to |attach|, |detach|, etc. // from interrupting our final move to the detached state. this.loadMode_ = shaka.Player.LoadMode.DESTROYED; await detachPromise; // A PreloadManager can only be used with the Player instance that created // it, so all PreloadManagers this Player has created are now useless. // Destroy any remaining managers now, to help prevent memory leaks. await this.destroyAllPreloads(); // Tear-down the event managers to ensure handlers stop firing. if (this.globalEventManager_) { this.globalEventManager_.release(); this.globalEventManager_ = null; } if (this.attachEventManager_) { this.attachEventManager_.release(); this.attachEventManager_ = null; } if (this.loadEventManager_) { this.loadEventManager_.release(); this.loadEventManager_ = null; } if (this.trickPlayEventManager_) { this.trickPlayEventManager_.release(); this.trickPlayEventManager_ = null; } if (this.adManagerEventManager_) { this.adManagerEventManager_.release(); this.adManagerEventManager_ = null; } this.abrManagerFactory_ = null; this.config_ = null; this.stats_ = null; this.videoContainer_ = null; this.cmcdManager_ = null; this.cmsdManager_ = null; if (this.networkingEngine_) { await this.networkingEngine_.destroy(); this.networkingEngine_ = null; } if (this.abrManager_) { this.abrManager_.release(); this.abrManager_ = null; } // FakeEventTarget implements IReleasable super.release(); } /** * Registers a plugin callback that will be called with * <code>support()</code>. The callback will return the value that will be * stored in the return value from <code>support()</code>. * * @param {string} name * @param {function():*} callback * @export */ static registerSupportPlugin(name, callback) { shaka.Player.supportPlugins_[name] = callback; } /** * Set a factory to create an ad manager during player construction time. * This method needs to be called bafore instantiating the Player class. * * @param {!shaka.extern.IAdManager.Factory} factory * @export */ static setAdManagerFactory(factory) { shaka.Player.adManagerFactory_ = factory; } /** * Return whether the browser provides basic support. If this returns false, * Shaka Player cannot be used at all. In this case, do not construct a * Player instance and do not use the library. * * @return {boolean} * @export */ static isBrowserSupported() { if (!window.Promise) { shaka.log.alwaysWarn('A Promise implementation or polyfill is required'); } // Basic features needed for the library to be usable. const basicSupport = !!window.Promise && !!window.Uint8Array && // eslint-disable-next-line no-restricted-syntax !!Array.prototype.forEach; if (!basicSupport) { return false; } // We do not support IE if (shaka.util.Platform.isIE()) { return false; } const safariVersion = shaka.util.Platform.safariVersion(); if (safariVersion && safariVersion < 9) { return false; } // DRM support is not strictly necessary, but the APIs at least need to be // there. Our no-op DRM polyfill should handle that. // TODO(#1017): Consider making even DrmEngine optional. const drmSupport = shaka.media.DrmEngine.isBrowserSupported(); if (!drmSupport) { return false; } // If we have MediaSource (MSE) support, we should be able to use Shaka. if (shaka.util.Platform.supportsMediaSource()) { return true; } // If we don't have MSE, we _may_ be able to use Shaka. Look for native HLS // support, and call this platform usable if we have it. return shaka.util.Platform.supportsMediaType('application/x-mpegurl'); } /** * Probes the browser to determine what features are supported. This makes a * number of requests to EME/MSE/etc which may result in user prompts. This * should only be used for diagnostics. * * <p> * NOTE: This may show a request to the user for permission. * * @see https://bit.ly/2ywccmH * @param {boolean=} promptsOkay * @return {!Promise.<shaka.extern.SupportType>} * @export */ static async probeSupport(promptsOkay=true) { goog.asserts.assert(shaka.Player.isBrowserSupported(), 'Must have basic support'); let drm = {}; if (promptsOkay) { drm = await shaka.media.DrmEngine.probeSupport(); } const manifest = shaka.media.ManifestParser.probeSupport(); const media = shaka.media.MediaSourceEngine.probeSupport(); const hardwareResolution = await shaka.util.Platform.detectMaxHardwareResolution(); /** @type {shaka.extern.SupportType} */ const ret = { manifest, media, drm, hardwareResolution, }; const plugins = shaka.Player.supportPlugins_; for (const name in plugins) { ret[name] = plugins[name](); } return ret; } /** * Makes a fires an event corresponding to entering a state of the loading * process. * @param {string} nodeName * @private */ makeStateChangeEvent_(nodeName) { this.dispatchEvent(shaka.Player.makeEvent_( /* name= */ shaka.util.FakeEvent.EventName.OnStateChange, /* data= */ (new Map()).set('state', nodeName))); } /** * Attaches the player to a media element. * If the player was already attached to a media element, first detaches from * that media element. * * @param {!HTMLMediaElement} mediaElement * @param {boolean=} initializeMediaSource * @return {!Promise} * @export */ async attach(mediaElement, initializeMediaSource = true) { // Do not allow the player to be used after |destroy| is called. if (this.loadMode_ == shaka.Player.LoadMode.DESTROYED) { throw this.createAbortLoadError_(); } const noop = this.video_ && this.video_ == mediaElement; if (this.video_ && this.video_ != mediaElement) { await this.detach(); } if (await this.atomicOperationAcquireMutex_('attach')) { return; } try { if (!noop) { this.makeStateChangeEvent_('attach'); const onError = (error) => this.onVideoError_(error); this.attachEventManager_.listen(mediaElement, 'error', onError); this.video_ = mediaElement; } // Only initialize media source if the platform supports it. if (initializeMediaSource && shaka.util.Platform.supportsMediaSource() && !this.mediaSourceEngine_) { await this.initializeMediaSourceEngineInner_(); } } catch (error) { await this.detach(); throw error; } finally { this.mutex_.release(); } } /** * Calling <code>attachCanvas</code> will tell the player to set canvas * element for LCEVC decoding. * * @param {HTMLCanvasElement} canvas * @export */ attachCanvas(canvas) { this.lcevcCanvas_ = canvas; } /** * Detach the player from the current media element. Leaves the player in a * state where it cannot play media, until it has been attached to something * else. * * @param {boolean=} keepAdManager * * @return {!Promise} * @export */ async detach(keepAdManager = false) { // Do not allow the player to be used after |destroy| is called. if (this.loadMode_ == shaka.Player.LoadMode.DESTROYED) { throw this.createAbortLoadError_(); } await this.unload(/* initializeMediaSource= */ false, keepAdManager); if (await this.atomicOperationAcquireMutex_('detach')) { return; } try { // If we were going from "detached" to "detached" we wouldn't have // a media element to detach from. if (this.video_) { this.attachEventManager_.removeAll(); this.video_ = null; } this.makeStateChangeEvent_('detach'); if (this.adManager_ && !keepAdManager) { // The ad manager is specific to the video, so detach it too. this.adManager_.release(); } } finally { this.mutex_.release(); } } /** * Tries to acquire the mutex, and then returns if the operation should end * early due to someone else starting a mutex-acquiring operation. * Meant for operations that can't be interrupted midway through (e.g. * everything but load). * @param {string} mutexIdentifier * @return {!Promise.<boolean>} endEarly If false, the calling context will * need to release the mutex. * @private */ async atomicOperationAcquireMutex_(mutexIdentifier) { const operationId = ++this.operationId_; await this.mutex_.acquire(mutexIdentifier); if (operationId != this.operationId_) { this.mutex_.release(); return true; } return false; } /** * Unloads the currently playing stream, if any. * * @param {boolean=} initializeMediaSource * @param {boolean=} keepAdManager * @return {!Promise} * @export */ async unload(initializeMediaSource = true, keepAdManager = false) { // Set the load mode to unload right away so that all the public methods // will stop using the internal components. We need to make sure that we // are not overriding the destroyed state because we will unload when we are // destroying the player. if (this.loadMode_ != shaka.Player.LoadMode.DESTROYED) { this.loadMode_ = shaka.Player.LoadMode.NOT_LOADED; } if (await this.atomicOperationAcquireMutex_('unload')) { return; } try { this.fullyLoaded_ = false; this.makeStateChangeEvent_('unload'); // If the platform does not support media source, we will never want to // initialize media source. if (initializeMediaSource && !shaka.util.Platform.supportsMediaSource()) { initializeMediaSource = false; } // If LCEVC Decoder exists close it. this.closeLcevcDec_(); // Run any general cleanup tasks now. This should be here at the top, // right after setting loadMode_, so that internal components still exist // as they did when the cleanup tasks were registered in the array. const cleanupTasks = this.cleanupOnUnload_.map((cb) => cb()); this.cleanupOnUnload_ = []; await Promise.all(cleanupTasks); // Dispatch the unloading event. this.dispatchEvent( shaka.Player.makeEvent_(shaka.util.FakeEvent.EventName.Unloading)); // Release the region timeline, which is created when parsing the // manifest. if (this.regionTimeline_) { this.regionTimeline_.release(); this.regionTimeline_ = null; } // In most cases we should have a media element. The one exception would // be if there was an error and we, by chance, did not have a media // element. if (this.video_) { this.loadEventManager_.removeAll(); this.trickPlayEventManager_.removeAll(); } // Stop the variant checker timer this.checkVariantsTimer_.stop(); // Some observers use some playback components, shutting down the // observers first ensures that they don't try to use the playback // components mid-destroy. if (this.playheadObservers_) { this.playheadObservers_.release(); this.playheadObservers_ = null; } if (this.bufferPoller_) { this.bufferPoller_.stop(); this.bufferPoller_ = null; } // Stop the parser early. Since it is at the start of the pipeline, it // should be start early to avoid is pushing new data downstream. if (this.parser_) { await this.parser_.stop(); this.parser_ = null; this.parserFactory_ = null; } // Abr Manager will tell streaming engine what to do, so we need to stop // it before we destroy streaming engine. Unlike with the other // components, we do not release the instance, we will reuse it in later // loads. if (this.abrManager_) { await this.abrManager_.stop(); } // Streaming engine will push new data to media source engine, so we need // to shut it down before destroy media source engine. if (this.streamingEngine_) { await this.streamingEngine_.destroy(); this.streamingEngine_ = null; } if (this.playRateController_) { this.playRateController_.release(); this.playRateController_ = null; } // Playhead is used by StreamingEngine, so we can't destroy this until // after StreamingEngine has stopped. if (this.playhead_) { this.playhead_.release(); this.playhead_ = null; } // EME v0.1b requires the media element to clear the MediaKeys if (shaka.util.Platform.isMediaKeysPolyfilled('webkit') && this.drmEngine_) { await this.drmEngine_.destroy(); this.drmEngine_ = null; } // Media source engine holds onto the media element, and in order to // detach the media keys (with drm engine), we need to break the // connection between media source engine and the media element. if (this.mediaSourceEngine_) { await this.mediaSourceEngine_.destroy(); this.mediaSourceEngine_ = null; } if (this.adManager_ && !keepAdManager) { this.adManager_.onAssetUnload(); } if (this.preloadDueAdManager_ && !keepAdManager) { this.preloadDueAdManager_.destroy(); this.preloadDueAdManager_ = null; } if (!keepAdManager) { this.preloadDueAdManagerTimer_.stop(); } if (this.cmcdManager_) { this.cmcdManager_.reset(); } if (this.cmsdManager_) { this.cmsdManager_.reset(); } if (this.video_) { // Remove all track nodes shaka.util.Dom.removeAllChildren(this.video_); } // In order to unload a media element, we need to remove the src attribute // and then load again. When we destroy media source engine, this will be // done for us, but for src=, we need to do it here. // // DrmEngine requires this to be done before we destroy DrmEngine itself. if (this.video_ && this.video_.src) { // TODO: Investigate this more. Only reproduces on Firefox 69. // Introduce a delay before detaching the video source. We are seeing // spurious Promise rejections involving an AbortError in our tests // otherwise. await new Promise( (resolve) => new shaka.util.Timer(resolve).tickAfter(0.1)); this.video_.removeAttribute('src'); this.video_.load(); } if (this.drmEngine_) { await this.drmEngine_.destroy(); this.drmEngine_ = null; } if (this.preloadNextUrl_ && this.assetUri_ != this.preloadNextUrl_.getAssetUri()) { if (!this.preloadNextUrl_.isDestroyed()) { this.preloadNextUrl_.destroy(); } this.preloadNextUrl_ = null; } this.assetUri_ = null; this.mimeType_ = null; this.bufferObserver_ = null; if (this.manifest_) { for (const variant of this.manifest_.variants) { for (const stream of [variant.audio, variant.video]) { if (stream && stream.segmentIndex) { stream.segmentIndex.release(); } } } for (const stream of this.manifest_.textStreams) { if (stream.segmentIndex) { stream.segmentIndex.release(); } } } // On some devices, cached MediaKeySystemAccess objects may corrupt // after several playbacks, and they are not able anymore to properly // create MediaKeys objects. To prevent it, clear the cache after // each playback. if (this.config_.streaming.clearDecodingCache) { shaka.util.StreamUtils.clearDecodingConfigCache(); shaka.media.DrmEngine.clearMediaKeySystemAccessMap(); } this.manifest_ = null; this.stats_ = new shaka.util.Stats(); // Replace with a clean object. this.lastTextFactory_ = null; this.targetLatencyReached_ = null; this.currentTargetLatency_ = null; this.rebufferingCount_ = -1; this.externalSrcEqualsThumbnailsStreams_ = []; this.completionPercent_ = NaN; // Make sure that the app knows of the new buffering state. this.updateBufferState_(); } finally { this.mutex_.release(); } if (initializeMediaSource && shaka.util.Platform.supportsMediaSource() && !this.mediaSourceEngine_ && this.video_) { await this.initializeMediaSourceEngineInner_(); } } /** * Provides a way to update the stream start position during the media loading * process. Can for example be called from the <code>manifestparsed</code> * event handler to update the start position based on information in the * manifest. * * @param {number} startTime * @export */ updateStartTime(startTime) { this.startTime_ = startTime; } /** * Loads a new stream. * If another stream was already playing, first unloads that stream. * * @param {string|shaka.media.PreloadManager} assetUriOrPreloader * @param {?number=} startTime * When <code>startTime</code> is <code>null</code> or * <code>undefined</code>, playback will start at the default start time (0 * for VOD and liveEdge for LIVE). * @param {?string=} mimeType * @return {!Promise} * @export */ async load(assetUriOrPreloader, startTime = null, mimeType) { // Do not allow the player to be used after |destroy| is called. if (this.loadMode_ == shaka.Player.LoadMode.DESTROYED) { throw this.createAbortLoadError_(); } /** @type {?shaka.media.PreloadManager} */ let preloadManager = null; let assetUri = ''; if (assetUriOrPreloader instanceof shaka.media.PreloadManager) { preloadManager = assetUriOrPreloader; assetUri = preloadManager.getAssetUri() || ''; } else { assetUri = assetUriOrPreloader || ''; } // Quickly acquire the mutex, so this will wait for other top-level // operations. await this.mutex_.acquire('load'); this.mutex_.release(); if (!this.video_) { throw new shaka.util.Error( shaka.util.Error.Severity.CRITICAL, shaka.util.Error.Category.PLAYER, shaka.util.Error.Code.NO_VIDEO_ELEMENT); } if (this.assetUri_) { // Note: This is used to avoid the destruction of the nextUrl // preloadManager that can be the current one. this.assetUri_ = assetUri; await this.unload(/* initializeMediaSource= */ false); } // Add a mechanism to detect if the load process has been interrupted by a // call to another top-level operation (unload, load, etc). const operationId = ++this.operationId_; const detectInterruption = async () => { if (this.operationId_ != operationId) { if (preloadManager) { await preloadManager.destroy(); } throw this.createAbortLoadError_(); } }; /** * Wraps a given operation with mutex.acquire and mutex.release, along with * calls to detectInterruption, to catch any other top-level calls happening * while waiting for the mutex. * @param {function():!Promise} operation * @param {string} mutexIdentifier * @return {!Promise} */ const mutexWrapOperation = async (operation, mutexIdentifier) => { try { await this.mutex_.acquire(mutexIdentifier); await detectInterruption(); await operation(); await detectInterruption(); if (preloadManager && this.config_) { preloadManager.reconfigure(this.config_); } } finally { this.mutex_.release(); } }; try { if (startTime == null && preloadManager) { startTime = preloadManager.getStartTime(); } this.startTime_ = startTime; this.fullyLoaded_ = false; // We dispatch the loading event when someone calls |load| because we want // to surface the user intent. this.dispatchEvent(shaka.Player.makeEvent_( shaka.util.FakeEvent.EventName.Loading)); if (preloadManager) { mimeType = preloadManager.getMimeType(); } else if (!mimeType) { await mutexWrapOperation(async () => { mimeType = await this.guessMimeType_(assetUri); }, 'guessMimeType_'); } const wasPreloaded = !!preloadManager; if (!preloadManager) { // For simplicity, if an asset is NOT preloaded, start an internal // "preload" here without prefetch. // That way, both a preload and normal load can follow the same code // paths. // NOTE: await preloadInner_ can be outside the mutex because it should // not mutate "this". preloadManager = await this.preloadInner_( assetUri, startTime, mimeType, /* standardLoad= */ true); if (preloadManager) { preloadManager.setEventHandoffTarget(this); this.stats_ = preloadManager.getStats(); preloadManager.start(); // Silence "uncaught error" warnings from this. Unless we are // interrupted, we will check the result of this process and respond // appropriately. If we are interrupted, we can ignore any error // there. preloadManager.waitForFinish().catch(() => {}); } else { this.stats_ = new shaka.util.Stats(); } } else { // Hook up events, so any events emitted by the preloadManager will // instead be emitted by the player. preloadManager.setEventHandoffTarget(this); this.stats_ = preloadManager.getStats(); } // Now, if there is no preload manager, that means that this is a src= // asset. const shouldUseSrcEquals = !preloadManager; const startTimeOfLoad = Date.now() / 1000; // Stats are for a single playback/load session. Stats must be initialized // before we allow calls to |updateStateHistory|. this.stats_ = preloadManager ? preloadManager.getStats() : new shaka.util.Stats(); this.assetUri_ = assetUri; this.mimeType_ = mimeType || null; if (shouldUseSrcEquals) { await mutexWrapOperation(async () => { goog.asserts.assert(mimeType, 'We should know the mimeType by now!'); await this.initializeSrcEqualsDrmInner_(mimeType); }, 'initializeSrcEqualsDrmInner_'); await mutexWrapOperation(async () => { goog.asserts.assert(mimeType, 'We should know the mimeType by now!'); await this.srcEqualsInner_(startTimeOfLoad, mimeType); }, 'srcEqualsInner_'); } else { if (!this.mediaSourceEngine_) { await mutexWrapOperation(async () => { await this.initializeMediaSourceEngineInner_(); }, 'initializeMediaSourceEngineInner_'); } // Wait for the preload manager to do all of the loading it can do. await mutexWrapOperation(async () => { await preloadManager.waitForFinish(); }, 'waitForFinish'); // Get manifest and associated values from preloader. this.config_ = preloadManager.getConfiguration(); this.manifestFilterer_ = preloadManager.getManifestFilterer(); this.parserFactory_ = preloadManager.getParserFactory(); this.parser_ = preloadManager.receiveParser(); if (this.parser_ && this.parser_.setMediaElement && this.video_) { this.parser_.setMediaElement(this.video_); } this.regionTimeline_ = preloadManager.receiveRegionTimeline(); this.qualityObserver_ = preloadManager.getQualityObserver(); this.manifest_ = preloadManager.getManifest(); const currentAdaptationSetCriteria = preloadManager.getCurrentAdaptationSetCriteria(); if (currentAdaptationSetCriteria) { this.currentAdaptationSetCriteria_ = currentAdaptationSetCriteria; } if (wasPreloaded && this.video_ && this.video_.nodeName === 'AUDIO') { // Filter the variants to be audio-only after the fact. // As, when preloading, we don't know if we are going to be attached // to a video or audio element when we load, we have to do the auto // audio-only filtering here, post-facto. this.makeManifestAudioOnly_(); // And continue to do so in the future. this.configure('manifest.disableVideo', true); } // Get drm engine from preloader, then finalize it. this.drmEngine_ = preloadManager.receiveDrmEngine(); await mutexWrapOperation(async () => { await this.drmEngine_.attach(this.video_); }, 'drmEngine_.attach'); // Also get the ABR manager, which has special logic related to being // received. const abrManagerFactory = preloadManager.getAbrManagerFactory(); if (abrManagerFactory) { if (!this.abrManagerFactory_ || this.abrManagerFactory_ != abrManagerFactory) { this.abrManager_ = preloadManager.receiveAbrManager(); this.abrManagerFactory_ = preloadManager.getAbrManagerFactory(); if (typeof this.abrManager_.setMediaElement != 'function') { shaka.Deprecate.deprecateFeature(5, 'AbrManager w/o setMediaElement', 'Please use an AbrManager with setMediaElement function.'); this.abrManager_.setMediaElement = () => {}; } if (typeof this.abrManager_.setCmsdManager != 'function') { shaka.Deprecate.deprecateFeature(5, 'AbrManager w/o setCmsdManager', 'Please use an AbrManager with setCmsdManager function.'); this.abrManager_.setCmsdManager = () => {}; } if (typeof this.abrManager_.trySuggestStreams != 'function') { shaka.Deprecate.deprecateFeature(5, 'AbrManager w/o trySuggestStreams', 'Please use an AbrManager with trySuggestStreams function.'); this.abrManager_.trySuggestStreams = () => {}; } } } // Load the asset. const segmentPrefetchById = preloadManager.receiveSegmentPrefetchesById(); const prefetchedVariant = preloadManager.getPrefetchedVariant(); await mutexWrapOperation(async () => { await this.loadInner_( startTimeOfLoad, prefetchedVariant, segmentPrefetchById); }, 'loadInner_'); preloadManager.stopQueuingLatePhaseQueuedOperations(); } this.dispatchEvent(shaka.Player.makeEvent_( shaka.util.FakeEvent.EventName.Loaded)); } catch (error) { if (error.code != shaka.util.Error.Code.LOAD_INTERRUPTED) { await this.unload(/* initializeMediaSource= */ false); } throw error; } finally { if (preloadManager) { // This will cause any resources that were generated but not used to be // properly destroyed or released. await preloadManager.destroy(); } this.preloadNextUrl_ = null; } } /** * Modifies the current manifest so that it is audio-only. * @private */ makeManifestAudioOnly_() { for (const variant of this.manifest_.variants) { if (variant.video) { variant.video.closeSegmentIndex(); variant.video = null; } if (variant.audio && variant.audio.bandwidth) { variant.bandwidth = variant.audio.bandwidth; } else { variant.bandwidth = 0; } } this.manifest_.variants = this.manifest_.variants.filter((v) => { return v.audio; }); } /** * Unloads the currently playing stream, if any, and returns a PreloadManager * that contains the loaded manifest of that asset, if any. * Allows for the asset to be re-loaded by this player faster, in the future. * When in src= mode, this unloads but does not make a PreloadManager. * * @param {boolean=} initializeMediaSource * @param {boolean=} keepAdManager * @return {!Promise.<?shaka.media.PreloadManager>} * @export */ async unloadAndSavePreload( initializeMediaSource = true, keepAdManager = false) { const preloadManager = await this.savePreload_(); await this.unload(initializeMediaSource, keepAdManager); return preloadManager; } /** * Detach the player from the current media element, if any, and returns a * PreloadManager that contains the loaded manifest of that asset, if any. * Allows for the asset to be re-loaded by this player faster, in the future. * When in src= mode, this detach but does not make a PreloadManager. * Leaves the player in a state where it cannot play media, until it has been * attached to something else. * * @param {boolean=} keepAdManager * @param {boolean=} saveLivePosition * @return {!Promise.<?shaka.media.PreloadManager>} * @export */ async detachAndSavePreload(keepAdManager = false, saveLivePosition = false) { const preloadManager = await this.savePreload_(saveLivePosition); await this.detach(keepAdManager); return preloadManager; } /** * @param {boolean=} saveLivePosition * @return {!Promise.<?shaka.media.PreloadManager>} * @private */ async savePreload_(saveLivePosition = false) { let preloadManager = null; if (this.manifest_ && this.parser_ && this.parserFactory_ && this.assetUri_) { let startTime = this.video_.currentTime; if (this.isLive() && !saveLivePosition) { startTime = null; } // We have enough information to make a PreloadManager! preloadManager = await this.makePreloadManager_( this.assetUri_, startTime, this.mimeType_, /* allowPrefetch= */ true, /* disableVideo= */ false, /* allowMakeAbrManager= */ false); this.createdPreloadManagers_.push(preloadManager); if (this.parser_ && this.parser_.setMediaElement) { this.parser_.setMediaElement(/* mediaElement= */ null); } preloadManager.attachManifest( this.manifest_, this.parser_, this.parserFactory_); preloadManager.attachAbrManager( this.abrManager_, this.abrManagerFactory_); preloadManager.attachAdaptationSetCriteria( this.currentAdaptationSetCriteria_); preloadManager.start(); // Null the manifest and manifestParser, so that they won't be shut down // during unload and will continue to live inside the preloadManager. this.manifest_ = null; this.parser_ = null; this.parserFactory_ = null; // Null the abrManager and abrManagerFactory, so that they won't be shut // down during unload and will continue to live inside the preloadManager. this.abrManager_ = null; this.abrManagerFactory_ = null; } return preloadManager; } /** * Starts to preload a given asset, and returns a PreloadManager object that * represents that preloading process. * The PreloadManager will load the manifest for that asset, as well as the * initialization segment. It will not preload anything more than that; * this feature is intended for reducing start-time latency, not for fully * downloading assets before playing them (for that, use * |shaka.offline.Storage|). * You can pass that PreloadManager object in to the |load| method on this * Player instance to finish loading that particular asset, or you can call * the |destroy| method on the manager if the preload is no longer necessary. * If this returns null rather than a PreloadManager, that indicates that the * asset must be played with src=, which cannot be preloaded. * * @param {string} assetUri * @param {?number=} startTime * When <code>startTime</code> is <code>null</code> or * <code>undefined</code>, playback will start at the default start time (0 * for VOD and liveEdge for LIVE). * @param {?string=} mimeType * @return {!Promise.<?shaka.media.PreloadManager>} * @export */ async preload(assetUri, startTime = null, mimeType) { const preloadManager = await this.preloadInner_( assetUri, startTime, mimeType); if (!preloadManager) { this.onError_(new shaka.util.Error( shaka.util.Error.Severity.CRITICAL, shaka.util.Error.Category.PLAYER, shaka.util.Error.Code.SRC_EQUALS_PRELOAD_NOT_SUPPORTED)); } else { preloadManager.start(); } return preloadManager; } /** * Calls |destroy| on each PreloadManager object this player has created. * @export */ async destroyAllPreloads() { const preloadManagerDestroys = []; for (const preloadManager of this.createdPreloadManagers_) { if (!preloadManager.isDestroyed()) { preloadManagerDestroys.push(preloadManager.destroy()); } } this.createdPreloadManagers_ = []; await Promise.all(preloadManagerDestroys); } /** * @param {string} assetUri * @param {?number} startTime * @param {?string=} mimeType * @param {boolean=} standardLoad * @return {!Promise.<?shaka.media.PreloadManager>} * @private */ async preloadInner_(assetUri, startTime, mimeType, standardLoad = false) { goog.asserts.assert(this.networkingEngine_, 'Should have a net engine!'); goog.asserts.assert(this.config_, 'Config must not be null!'); if (!mimeType) { mimeType = await this.guessMimeType_(assetUri); } const shouldUseSrcEquals = this.shouldUseSrcEquals_(assetUri, mimeType); if (shouldUseSrcEquals) { // We cannot preload src= content. return null; } let disableVideo = false; let allowMakeAbrManager = true; if (standardLoad) { if (this.abrManager_ && this.abrManagerFactory_ == this.config_.abrFactory) { // If there's already an abr manager, don't make a new abr manager at // all. // In standardLoad mode, the abr manager isn't used for anything anyway, // so it should only be created to create an abr manager for the player // to use... which is unnecessary if we already have one of the right // type. allowMakeAbrManager = false; } if (this.video_ && this.video_.nodeName === 'AUDIO') { disableVideo = true; } } let preloadManagerPromise = this.makePreloadManager_( assetUri, startTime, mimeType || null, /* allowPrefetch= */ !standardLoad, disableVideo, allowMakeAbrManager); if (!standardLoad) { // We only need to track the PreloadManager if it is not part of a // standard load. If it is, the load() method will handle destroying it. // Adding a standard load PreloadManager to the createdPreloadManagers_ // array runs the risk that the user will call destroyAllPreloads and // destroy that PreloadManager mid-load. preloadManagerPromise = preloadManagerPromise.then((preloadManager) => { this.createdPreloadManagers_.push(preloadManager); return preloadManager; }); } return preloadManagerPromise; } /** * @param {string} assetUri * @param {?number} startTime * @param {?string} mimeType * @param {boolean=} allowPrefetch * @param {boolean=} disableVideo * @param {boolean=} allowMakeAbrManager * @return {!Promise.<!shaka.media.PreloadManager>} * @private */ async makePreloadManager_(assetUri, startTime, mimeType, allowPrefetch = true, disableVideo = false, allowMakeAbrManager = true) { goog.asserts.assert(this.networkingEngine_, 'Must have net engine'); /** @type {?shaka.media.PreloadManager} */ let preloadManager = null; const config = shaka.util.ObjectUtils.cloneObject(this.config_); if (disableVideo) { config.manifest.disableVideo = true; } const getPreloadManager = () => { goog.asserts.assert(preloadManager, 'Must have preload manager'); if (preloadManager.hasBeenAttached() && preloadManager.isDestroyed()) { return null; } return preloadManager; }; const getConfig = () => { if (getPreloadManager()) { return getPreloadManager().getConfiguration(); } else { return this.config_; } }; const setConfig = (name, value) => { if (getPreloadManager()) { preloadManager.configure(name, value); } else { this.configure(name, value); } }; // Avoid having to detect the resolution again if it has already been // detected or set if (this.maxHwRes_.width == Infinity && this.maxHwRes_.height == Infinity) { const maxResolution = await shaka.util.Platform.detectMaxHardwareResolution(); this.maxHwRes_.width = maxResolution.width; this.maxHwRes_.height = maxResolution.height; } const manifestFilterer = new shaka.media.ManifestFilterer( config, this.maxHwRes_, null); const manifestPlayerInterface = { networkingEngine: this.networkingEngine_, filter: async (manifest) => { const tracksChanged = await manifestFilterer.filterManifest(manifest); if (tracksChanged) { // Delay the 'trackschanged' event so StreamingEngine has time to // absorb the changes before the user tries to query it. const event = shaka.Player.makeEvent_( shaka.util.FakeEvent.EventName.TracksChanged); await Promise.resolve(); preloadManager.dispatchEvent(event); } }, makeTextStreamsForClosedCaptions: (manifest) => { return this.makeTextStreamsForClosedCaptions_(manifest); }, // Called when the parser finds a timeline region. This can be called // before we start playback or during playback (live/in-progress // manifest). onTimelineRegionAdded: (region) => { preloadManager.getRegionTimeline().addRegion(region); }, onEvent: (event) => preloadManager.dispatchEvent(event), onError: (error) => preloadManager.onError(error), isLowLatencyMode: () => getConfig().streaming.lowLatencyMode, isAutoLowLatencyMode: () => getConfig().streaming.autoLowLatencyMode, enableLowLatencyMode: () => { setConfig('streaming.lowLatencyMode', true); }, updateDuration: () => { if (this.streamingEngine_ && preloadManager.hasBeenAttached()) { this.streamingEngine_.updateDuration(); } }, newDrmInfo: (stream) => { // We may need to create new sessions for any new init data. const drmEngine = preloadManager.getDrmEngine(); const currentDrmInfo = drmEngine ? drmEngine.getDrmInfo() : null; // DrmEngine.newInitData() requires mediaKeys to be available. if (currentDrmInfo && drmEngine.getMediaKeys()) { manifestFilterer.processDrmInfos(currentDrmInfo.keySystem, stream); } }, onManifestUpdated: () => { const eventName = shaka.util.FakeEvent.EventName.ManifestUpdated; const data = (new Map()).set('isLive', this.isLive()); preloadManager.dispatchEvent(shaka.Player.makeEvent_(eventName, data)); preloadManager.addQueuedOperation(false, () => { if (this.adManager_) { this.adManager_.onManifestUpdated(this.isLive()); } }); }, getBandwidthEstimate: () => this.abrManager_.getBandwidthEstimate(), onMetadata: (type, startTime, endTime, values) => { let metadataType = type; if (type == 'com.apple.hls.interstitial') { metadataType = 'com.apple.quicktime.HLS'; /** @type {shaka.extern.Interstitial} */ const interstitial = { startTime, endTime, values, }; if (this.adManager_) { goog.asserts.assert(this.video_, 'Must have video'); this.adManager_.onInterstitialMetadata( this, this.video_, interstitial); } } for (const payload of values) { preloadManager.addQueuedOperation(false, () => { this.dispatchMetadataEvent_( startTime, endTime, metadataType, payload); }); } }, disableStream: (stream) => this.disableStream( stream, this.config_.streaming.maxDisabledTime), }; const regionTimeline = new shaka.media.RegionTimeline(() => this.seekRange()); regionTimeline.addEventListener('regionadd', (event) => { /** @type {shaka.extern.TimelineRegionInfo} */ const region = event['region']; this.onRegionEvent_( shaka.util.FakeEvent.EventName.TimelineRegionAdded, region, preloadManager); preloadManager.addQueuedOperation(false, () => { if (this.adManager_) { this.adManager_.onDashTimedMetadata(region); } }); }); let qualityObserver = null; if (config.streaming.observeQualityChanges) { qualityObserver = new shaka.media.QualityObserver( () => this.getBufferedInfo()); qualityObserver.addEventListener('qualitychange', (event) => { /** @type {shaka.extern.MediaQualityInfo} */ const mediaQualityInfo = event['quality']; /** @type {number} */ const position = event['position']; this.onMediaQualityChange_(mediaQualityInfo, position); }); qualityObserver.addEventListener('audiotrackchange', (event) => { /** @type {shaka.extern.MediaQualityInfo} */ const mediaQualityInfo = event['quality']; /** @type {number} */ const position = event['position']; this.onMediaQualityChange_(mediaQualityInfo, position, /* audioTrackChanged= */ true); }); } let firstEvent = true; const drmPlayerInterface = { netEngine: this.networkingEngine_, onError: (e) => preloadManager.onError(e), onKeyStatus: (map) => { preloadManager.addQueuedOperation(true, () => { this.onKeyStatus_(map); }); }, onExpirationUpdated: (id, expiration) => { const event = shaka.Player.makeEvent_( shaka.util.FakeEvent.EventName.ExpirationUpdated); preloadManager.dispatchEvent(event); const parser = preloadManager.getParser(); if (parser && parser.onExpirationUpdated) { parser.onExpirationUpdated(id, expiration); } }, onEvent: (e) => { preloadManager.dispatchEvent(e); if (e.type == shaka.util.FakeEvent.EventName.DrmSessionUpdate && firstEvent) { firstEvent = false; const now = Date.now() / 1000; const delta = now - preloadManager.getStartTimeOfDRM(); const stats = this.stats_ || preloadManager.getStats(); stats.setDrmTime(delta); // LCEVC data by itself is not encrypted in DRM protected streams // and can therefore be accessed and decoded as normal. However, // the LCEVC decoder needs access to the VideoElement output in // order to apply the enhancement. In DRM contexts where the // browser CDM restricts access from our decoder, the enhancement // cannot be applied and therefore the LCEVC output canvas is // hidden accordingly. if (this.lcevcDec_) { this.lcevcDec_.hideCanvas(); } } }, }; // Sadly, as the network engine creation code must be replaceable by tests, // it cannot be made and use the utilities defined in this function. const networkingEngine = this.createNetworkingEngine(getPreloadManager); this.networkingEngine_.copyFiltersInto(networkingEngine); /** @return {!shaka.media.DrmEngine} */ const createDrmEngine = () => { return this.createDrmEngine(drmPlayerInterface); }; /** @type {!shaka.media.PreloadManager.PlayerInterface} */ const playerInterface = { config, manifestPlayerInterface, regionTimeline, qualityObserver, createDrmEngine, manifestFilterer, networkingEngine, allowPrefetch, allowMakeAbrManager, }; preloadManager = new shaka.media.PreloadManager( assetUri, mimeType, startTime, playerInterface); return preloadManager; } /** * Determines the mimeType of the given asset, if we are not told that inside * the loading process. * * @param {string} assetUri * @return {!Promise.<?string>} mimeType * @private */ async guessMimeType_(assetUri) { // If no MIME type is provided, and we can't base it on extension, make a // HEAD request to determine it. goog.asserts.assert(this.networkingEngine_, 'Should have a net engine!'); const retryParams = this.config_.manifest.retryParameters; let mimeType = await shaka.net.NetworkingUtils.getMimeType( assetUri, this.networkingEngine_, retryParams); if (mimeType == 'application/x-mpegurl' && shaka.util.Platform.isApple()) { mimeType = 'application/vnd.apple.mpegurl'; } return mimeType; } /** * Determines if we should use src equals, based on the the mimeType (if * known), the URI, and platform information. * * @param {string} assetUri * @param {?string=} mimeType * @return {boolean} * |true| if the content should be loaded with src=, |false| if the content * should be loaded with MediaSource. * @private */ shouldUseSrcEquals_(assetUri, mimeType) { const Platform = shaka.util.Platform; const MimeUtils = shaka.util.MimeUtils; // If we are using a platform that does not support media source, we will // fall back to src= to handle all playback. if (!Platform.supportsMediaSource()) { return true; } if (mimeType) { // If we have a MIME type, check if the browser can play it natively. // This will cover both single files and native HLS. const mediaElement = this.video_ || Platform.anyMediaElement(); const canPlayNatively = mediaElement.canPlayType(mimeType) != ''; // If we can't play natively, then src= isn't an option. if (!canPlayNatively) { return false; } const canPlayMediaSource = shaka.media.ManifestParser.isSupported(mimeType); // If MediaSource isn't an option, the native option is our only chance. if (!canPlayMediaSource) { return true; } // If we land here, both are feasible. goog.asserts.assert(canPlayNatively && canPlayMediaSource, 'Both native and MSE playback should be possible!'); // We would prefer MediaSource in some cases, and src= in others. For // example, Android has native HLS, but we'd prefer our own MediaSource // version there. if (MimeUtils.isHlsType(mimeType)) { // Native FairPlay HLS can be preferred on Apple platfforms. if (Platform.isApple() && (this.config_.drm.servers['com.apple.fps'] || this.config_.drm.servers['com.apple.fps.1_0'])) { return this.config_.streaming.useNativeHlsForFairPlay; } // Native HLS can be preferred on any platform via this flag: return this.config_.streaming.preferNativeHls; } // In all other cases, we prefer MediaSource. return false; } // Unless there are good reasons to use src= (single-file playback or native // HLS), we prefer MediaSource. So the final return value for choosing src= // is false. return false; } /** * Initializes the media source engine. * * @return {!Promise} * @private */ async initializeMediaSourceEngineInner_() { goog.asserts.assert( shaka.util.Platform.supportsMediaSource(), 'We should not be initializing media source on a platform that ' + 'does not support media source.'); goog.asserts.assert( this.video_, 'We should have a media element when initializing media source.'); goog.asserts.assert( this.mediaSourceEngine_ == null, 'We should not have a media source engine yet.'); this.makeStateChangeEvent_('media-source'); // When changing text visibility we need to update both the text displayer // and streaming engine because we don't always stream text. To ensure // that the text displayer and streaming engine are always in sync, wait // until they are both initialized before setting the initial value. const textDisplayerFactory = this.config_.textDisplayFactory; const textDisplayer = textDisplayerFactory(); if (textDisplayer.configure) { textDisplayer.configure(this.config_.textDisplayer); } else { shaka.Deprecate.deprecateFeature(5, 'Text displayer w/ configure', 'Text displayer should have a "configure" method!'); } this.lastTextFactory_ = textDisplayerFactory; const mediaSourceEngine = this.createMediaSourceEngine( this.video_, textDisplayer, { getKeySystem: () => this.keySystem(), onMetadata: (metadata, offset, endTime) => { this.processTimedMetadataMediaSrc_(metadata, offset, endTime); }, }, this.lcevcDec_); mediaSourceEngine.configure(this.config_.mediaSource); const {segmentRelativeVttTiming} = this.config_.manifest; mediaSourceEngine.setSegmentRelativeVttTiming(segmentRelativeVttTiming); // Wait for media source engine to finish opening. This promise should // NEVER be rejected as per the media source engine implementation. await mediaSourceEngine.open(); // Wait until it is ready to actually store the reference. this.mediaSourceEngine_ = mediaSourceEngine; } /** * Starts loading the content described by the parsed manifest. * * @param {number} startTimeOfLoad * @param {?shaka.extern.Variant} prefetchedVariant * @param {!Map.<number, shaka.media.SegmentPrefetch>} segmentPrefetchById * @return {!Promise} * @private */ async loadInner_(startTimeOfLoad, prefetchedVariant, segmentPrefetchById) { goog.asserts.assert( this.video_, 'We should have a media element by now.'); goog.asserts.assert( this.manifest_, 'The manifest should already be parsed.'); goog.asserts.assert( this.assetUri_, 'We should have an asset uri by now.'); goog.asserts.assert( this.abrManager_, 'We should have an abr manager by now.'); this.makeStateChangeEvent_('load'); const mediaElement = this.video_; this.playRateController_ = new shaka.media.PlayRateController({ getRate: () => mediaElement.playbackRate, getDefaultRate: () => mediaElement.defaultPlaybackRate, setRate: (rate) => { mediaElement.playbackRate = rate; }, movePlayhead: (delta) => { mediaElement.currentTime += delta; }, }); const updateStateHistory = () => this.updateStateHistory_(); const onRateChange = () => this.onRateChange_(); this.loadEventManager_.listen( mediaElement, 'playing', updateStateHistory); this.loadEventManager_.listen(mediaElement, 'pause', updateStateHistory); this.loadEventManager_.listen(mediaElement, 'ended', updateStateHistory); this.loadEventManager_.listen(mediaElement, 'ratechange', onRateChange); // Check the status of the LCEVC Dec Object. Reset, create, or close // depending on the config. this.setupLcevc_(this.config_); this.currentTextLanguage_ = this.config_.preferredTextLanguage; this.currentTextRole_ = this.config_.preferredTextRole; this.currentTextForced_ = this.config_.preferForcedSubs; shaka.Player.applyPlayRange_(this.manifest_.presentationTimeline, this.config_.playRangeStart, this.config_.playRangeEnd); this.abrManager_.init((variant, clearBuffer, safeMargin) => { return this.switch_(variant, clearBuffer, safeMargin); }); this.abrManager_.setMediaElement(mediaElement); this.abrManager_.setCmsdManager(this.cmsdManager_); this.streamingEngine_ = this.createStreamingEngine(); this.streamingEngine_.configure(this.config_.streaming); // Set the load mode to "loaded with media source" as late as possible so // that public methods won't try to access internal components until // they're all initialized. We MUST switch to loaded before calling // "streaming" so that they can access internal information. this.loadMode_ = shaka.Player.LoadMode.MEDIA_SOURCE; if (mediaElement.textTracks) { this.loadEventManager_.listen( mediaElement.textTracks, 'addtrack', (e) => { const trackEvent = /** @type {!TrackEvent} */(e); if (trackEvent.track) { const track = trackEvent.track; goog.asserts.assert( track instanceof TextTrack, 'Wrong track type!'); switch (track.kind) { case 'chapters': this.activateChaptersTrack_(track); break; } } }); } // The event must be fired after we filter by restrictions but before the // active stream is picked to allow those listening for the "streaming" // event to make changes before streaming starts. this.dispatchEvent(shaka.Player.makeEvent_( shaka.util.FakeEvent.EventName.Streaming)); // Pick the initial streams to play. // Unless the user has already picked a variant, anyway, by calling // selectVariantTrack before this loading stage. let initialVariant = prefetchedVariant; let toLazyLoad; let activeVariant; do { activeVariant = this.streamingEngine_.getCurrentVariant(); if (!activeVariant && !initialVariant) { initialVariant = this.chooseVariant_(/* initialSelection= */ true); goog.asserts.assert(initialVariant, 'Must choose an initial variant!'); } // Lazy-load the stream, so we will have enough info to make the playhead. const createSegmentIndexPromises = []; toLazyLoad = activeVariant || initialVariant; for (const stream of [toLazyLoad.video, toLazyLoad.audio]) { if (stream && !stream.segmentIndex) { createSegmentIndexPromises.push(stream.createSegmentIndex()); } } if (createSegmentIndexPromises.length > 0) { // eslint-disable-next-line no-await-in-loop await Promise.all(createSegmentIndexPromises); } } while (!toLazyLoad || toLazyLoad.disabledUntilTime != 0); if (this.parser_ && this.parser_.onInitialVariantChosen) { this.parser_.onInitialVariantChosen(toLazyLoad); } if (this.manifest_.isLowLatency && !this.config_.streaming.lowLatencyMode) { shaka.log.alwaysWarn('Low-latency live stream detected, but ' + 'low-latency streaming mode is not enabled in Shaka Player. ' + 'Set streaming.lowLatencyMode configuration to true, and see ' + 'https://bit.ly/3clctcj for details.'); } shaka.Player.applyPlayRange_(this.manifest_.presentationTimeline, this.config_.playRangeStart, this.config_.playRangeEnd); this.streamingEngine_.applyPlayRange( this.config_.playRangeStart, this.config_.playRangeEnd); const setupPlayhead = (startTime) => { this.playhead_ = this.createPlayhead(startTime); this.playheadObservers_ = this.createPlayheadObserversForMSE_(startTime); // We need to start the buffer management code near the end because it // will set the initial buffering state and that depends on other // components being initialized. const rebufferThreshold = Math.max( this.manifest_.minBufferTime, this.config_.streaming.rebufferingGoal); this.startBufferManagement_(mediaElement, rebufferThreshold); }; if (!this.config_.streaming.startAtSegmentBoundary) { setupPlayhead(this.startTime_); } // Now we can switch to the initial variant. if (!activeVariant) { goog.asserts.assert(initialVariant, 'Must have choosen an initial variant!'); // Now that we have initial streams, we may adjust the start time to // align to a segment boundary. if (this.config_.streaming.startAtSegmentBoundary) { const timeline = this.manifest_.presentationTimeline; let initialTime = this.startTime_ || this.video_.currentTime; const seekRangeStart = timeline.getSeekRangeStart(); const seekRangeEnd = timeline.getSeekRangeEnd(); if (initialTime < seekRangeStart) { initialTime = seekRangeStart; } else if (initialTime > seekRangeEnd) { initialTime = seekRangeEnd; } const startTime = await this.adjustStartTime_( initialVariant, initialTime); setupPlayhead(startTime); } this.switchVariant_(initialVariant, /* fromAdaptation= */ true, /* clearBuffer= */ false, /* safeMargin= */ 0); } this.playhead_.ready(); // Decide if text should be shown automatically. // similar to video/audio track, we would skip switch initial text track // if user already pick text track (via selectTextTrack api) const activeTextTrack = this.getTextTracks().find((t) => t.active); if (!activeTextTrack) { const initialTextStream = this.chooseTextStream_(); if (initialTextStream) { this.addTextStreamToSwitchHistory_( initialTextStream, /* fromAdaptation= */ true); } if (initialVariant) { this.setInitialTextState_(initialVariant, initialTextStream); } // Don't initialize with a text stream unless we should be streaming // text. if (initialTextStream && this.shouldStreamText_()) { this.streamingEngine_.switchTextStream(initialTextStream); } } // Start streaming content. This will start the flow of content down to // media source. await this.streamingEngine_.start(segmentPrefetchById); if (this.config_.abr.enabled) { this.abrManager_.enable(); this.onAbrStatusChanged_(); } // Dispatch a 'trackschanged' event now that all initial filtering is // done. this.onTracksChanged_(); // Now that we've filtered out variants that aren't compatible with the // active one, update abr manager with filtered variants. // NOTE: This may be unnecessary. We've already chosen one codec in // chooseCodecsAndFilterManifest_ before we started streaming. But it // doesn't hurt, and this will all change when we start using // MediaCapabilities and codec switching. // TODO(#1391): Re-evaluate with MediaCapabilities and codec switching. this.updateAbrManagerVariants_(); const hasPrimary = this.manifest_.variants.some((v) => v.primary); if (!this.config_.preferredAudioLanguage && !hasPrimary) { shaka.log.warning('No preferred audio language set. ' + 'We have chosen an arbitrary language initially'); } const isLive = this.isLive(); if ((isLive && ((this.config_.streaming.liveSync && this.config_.streaming.liveSync.enabled) || this.manifest_.serviceDescription || this.config_.streaming.liveSync.panicMode)) || this.config_.streaming.vodDynamicPlaybackRate) { const onTimeUpdate = () => this.onTimeUpdate_(); this.loadEventManager_.listen(mediaElement, 'timeupdate', onTimeUpdate); } if (!isLive) { const onVideoProgress = () => this.onVideoProgress_(); this.loadEventManager_.listen( mediaElement, 'timeupdate', onVideoProgress); this.onVideoProgress_(); if (this.manifest_.nextUrl) { if (this.config_.streaming.preloadNextUrlWindow > 0) { const onTimeUpdate = async () => { const timeToEnd = this.video_.duration - this.video_.currentTime; if (!isNaN(timeToEnd)) { if (timeToEnd <= this.config_.streaming.preloadNextUrlWindow) { this.loadEventManager_.unlisten( mediaElement, 'timeupdate', onTimeUpdate); goog.asserts.assert(this.manifest_.nextUrl, 'this.manifest_.nextUrl should be valid.'); this.preloadNextUrl_ = await this.preload(this.manifest_.nextUrl); } } }; this.loadEventManager_.listen( mediaElement, 'timeupdate', onTimeUpdate); } this.loadEventManager_.listen(mediaElement, 'ended', () => { this.load(this.preloadNextUrl_ || this.manifest_.nextUrl); }); } } if (this.adManager_) { this.adManager_.onManifestUpdated(isLive); } this.fullyLoaded_ = true; // Wait for the 'loadedmetadata' event to measure load() latency. this.loadEventManager_.listenOnce(mediaElement, 'loadedmetadata', () => { const now = Date.now() / 1000; const delta = now - startTimeOfLoad; this.stats_.setLoadLatency(delta); }); } /** * Initializes the DRM engine for use by src equals. * * @param {string} mimeType * @return {!Promise} * @private */ async initializeSrcEqualsDrmInner_(mimeType) { const ContentType = shaka.util.ManifestParserUtils.ContentType; goog.asserts.assert( this.networkingEngine_, '|onInitializeSrcEqualsDrm_| should never be called after |destroy|'); goog.asserts.assert( this.config_, '|onInitializeSrcEqualsDrm_| should never be called after |destroy|'); const startTime = Date.now() / 1000; let firstEvent = true; this.drmEngine_ = this.createDrmEngine({ netEngine: this.networkingEngine_, onError: (e) => { this.onError_(e); }, onKeyStatus: (map) => { // According to this.onKeyStatus_, we can't even use this information // in src= mode, so this is just a no-op. }, onExpirationUpdated: (id, expiration) => { const event = shaka.Player.makeEvent_( shaka.util.FakeEvent.EventName.ExpirationUpdated); this.dispatchEvent(event); }, onEvent: (e) => { this.dispatchEvent(e); if (e.type == shaka.util.FakeEvent.EventName.DrmSessionUpdate && firstEvent) { firstEvent = false; const now = Date.now() / 1000; const delta = now - startTime; this.stats_.setDrmTime(delta); } }, }); this.drmEngine_.configure(this.config_.drm); // TODO: Instead of feeding DrmEngine with Variants, we should refactor // DrmEngine so that it takes a minimal config derived from Variants. In // cases like this one or in removal of stored content, the details are // largely unimportant. We should have a saner way to initialize // DrmEngine. // That would also insulate DrmEngine from manifest changes in the future. // For now, that is time-consuming and this synthetic Variant is easy, so // I'm putting it off. Since this is only expected to be used for native // HLS in Safari, this should be safe. -JCP /** @type {shaka.extern.Variant} */ const variant = { id: 0, language: 'und', disabledUntilTime: 0, primary: false, audio: null, video: null, bandwidth: 100, allowedByApplication: true, allowedByKeySystem: true, decodingInfos: [], }; const stream = { id: 0, originalId: null, groupId: null, createSegmentIndex: () => Promise.resolve(), segmentIndex: null, mimeType: mimeType ? shaka.util.MimeUtils.getBasicType(mimeType) : '', codecs: mimeType ? shaka.util.MimeUtils.getCodecs(mimeType) : '', encrypted: true, drmInfos: [], // Filled in by DrmEngine config. keyIds: new Set(), language: 'und', originalLanguage: null, label: null, type: ContentType.VIDEO, primary: false, trickModeVideo: null, emsgSchemeIdUris: null, roles: [], forced: false, channelsCount: null, audioSamplingRate: null, spatialAudio: false, closedCaptions: null, accessibilityPurpose: null, external: false, fastSwitching: false, fullMimeTypes: new Set(), }; stream.fullMimeTypes.add(shaka.util.MimeUtils.getFullType( stream.mimeType, stream.codecs)); if (mimeType.startsWith('audio/')) { stream.type = ContentType.AUDIO; variant.audio = stream; } else { variant.video = stream; } this.drmEngine_.setSrcEquals(/* srcEquals= */ true); await this.drmEngine_.initForPlayback( [variant], /* offlineSessionIds= */ []); await this.drmEngine_.attach(this.video_); } /** * Passes the asset URI along to the media element, so it can be played src * equals style. * * @param {number} startTimeOfLoad * @param {string} mimeType * @return {!Promise} * * @private */ async srcEqualsInner_(startTimeOfLoad, mimeType) { this.makeStateChangeEvent_('src-equals'); goog.asserts.assert( this.video_, 'We should have a media element when loading.'); goog.asserts.assert( this.assetUri_, 'We should have a valid uri when loading.'); const mediaElement = this.video_; this.playhead_ = new shaka.media.SrcEqualsPlayhead(mediaElement); // This flag is used below in the language preference setup to check if // this load was canceled before the necessary awaits completed. let unloaded = false; this.cleanupOnUnload_.push(() => { unloaded = true; }); if (this.startTime_ != null) { this.playhead_.setStartTime(this.startTime_); } this.playRateController_ = new shaka.media.PlayRateController({ getRate: () => mediaElement.playbackRate, getDefaultRate: () => mediaElement.defaultPlaybackRate, setRate: (rate) => { mediaElement.playbackRate = rate; }, movePlayhead: (delta) => { mediaElement.currentTime += delta; }, }); // We need to start the buffer management code near the end because it // will set the initial buffering state and that depends on other // components being initialized. const rebufferThreshold = this.config_.streaming.rebufferingGoal; this.startBufferManagement_(mediaElement, rebufferThreshold); // Add all media element listeners. const updateStateHistory = () => this.updateStateHistory_(); const onRateChange = () => this.onRateChange_(); this.loadEventManager_.listen( mediaElement, 'playing', updateStateHistory); this.loadEventManager_.listen(mediaElement, 'pause', updateStateHistory); this.loadEventManager_.listen(mediaElement, 'ended', updateStateHistory); this.loadEventManager_.listen(mediaElement, 'ratechange', onRateChange); // Wait for the 'loadedmetadata' event to measure load() latency, but only // if preload is set in a way that would result in this event firing // automatically. // See https://github.com/shaka-project/shaka-player/issues/2483 if (mediaElement.preload != 'none') { this.loadEventManager_.listenOnce( mediaElement, 'loadedmetadata', () => { const now = Date.now() / 1000; const delta = now - startTimeOfLoad; this.stats_.setLoadLatency(delta); }); } // The audio tracks are only available on Safari at the moment, but this // drives the tracks API for Safari's native HLS. So when they change, // fire the corresponding Shaka Player event. if (mediaElement.audioTracks) { this.loadEventManager_.listen(mediaElement.audioTracks, 'addtrack', () => this.onTracksChanged_()); this.loadEventManager_.listen(mediaElement.audioTracks, 'removetrack', () => this.onTracksChanged_()); this.loadEventManager_.listen(mediaElement.audioTracks, 'change', () => this.onTracksChanged_()); } if (mediaElement.textTracks) { this.loadEventManager_.listen( mediaElement.textTracks, 'addtrack', (e) => { const trackEvent = /** @type {!TrackEvent} */(e); if (trackEvent.track) { const track = trackEvent.track; goog.asserts.assert( track instanceof TextTrack, 'Wrong track type!'); switch (track.kind) { case 'metadata': this.processTimedMetadataSrcEqls_(track); break; case 'chapters': this.activateChaptersTrack_(track); break; default: this.onTracksChanged_(); break; } } }); this.loadEventManager_.listen( mediaElement.textTracks, 'removetrack', () => this.onTracksChanged_()); this.loadEventManager_.listen( mediaElement.textTracks, 'change', () => this.onTracksChanged_()); } // By setting |src| we are done "loading" with src=. We don't need to set // the current time because |playhead| will do that for us. mediaElement.src = this.cmcdManager_.appendSrcData( this.assetUri_, mimeType); // Tizen 3 / WebOS won't load anything unless you call load() explicitly, // no matter the value of the preload attribute. This is harmful on some // other platforms by triggering unbounded loading of media data, but is // necessary here. if (shaka.util.Platform.isTizen() || shaka.util.Platform.isWebOS()) { mediaElement.load(); } // In Safari using HLS won't load anything unless you call load() // explicitly, no matter the value of the preload attribute. // Note: this only happens when there are not autoplay. if (mediaElement.preload != 'none' && !mediaElement.autoplay && shaka.util.MimeUtils.isHlsType(mimeType) && shaka.util.Platform.safariVersion()) { mediaElement.load(); } // Set the load mode last so that we know that all our components are // initialized. this.loadMode_ = shaka.Player.LoadMode.SRC_EQUALS; // The event doesn't mean as much for src= playback, since we don't // control streaming. But we should fire it in this path anyway since // some applications may be expecting it as a life-cycle event. this.dispatchEvent(shaka.Player.makeEvent_( shaka.util.FakeEvent.EventName.Streaming)); // The "load" Promise is resolved when we have loaded the metadata. If we // wait for the full data, that won't happen on Safari until the play // button is hit. const fullyLoaded = new shaka.util.PublicPromise(); shaka.util.MediaReadyState.waitForReadyState(mediaElement, HTMLMediaElement.HAVE_METADATA, this.loadEventManager_, () => { this.playhead_.ready(); fullyLoaded.resolve(); }); // We can't switch to preferred languages, though, until the data is // loaded. shaka.util.MediaReadyState.waitForReadyState(mediaElement, HTMLMediaElement.HAVE_CURRENT_DATA, this.loadEventManager_, async () => { this.setupPreferredAudioOnSrc_(); // Applying the text preference too soon can result in it being // reverted. Wait for native HLS to pick something first. const textTracks = this.getFilteredTextTracks_(); if (!textTracks.find((t) => t.mode != 'disabled')) { await new Promise((resolve) => { this.loadEventManager_.listenOnce( mediaElement.textTracks, 'change', resolve); // We expect the event to fire because it does on Safari. // But in case it doesn't on some other platform or future // version, move on in 1 second no matter what. This keeps the // language settings from being completely ignored if something // goes wrong. new shaka.util.Timer(resolve).tickAfter(1); }); } else if (textTracks.length > 0) { this.isTextVisible_ = true; } // If we have moved on to another piece of content while waiting for // the above event/timer, we should not change tracks here. if (unloaded) { return; } this.setupPreferredTextOnSrc_(); }); if (mediaElement.error) { // Already failed! fullyLoaded.reject(this.videoErrorToShakaError_()); } else if (mediaElement.preload == 'none') { shaka.log.alwaysWarn( 'With <video preload="none">, the browser will not load anything ' + 'until play() is called. We are unable to measure load latency ' + 'in a meaningful way, and we cannot provide track info yet. ' + 'Please do not use preload="none" with Shaka Player.'); // We can't wait for an event load loadedmetadata, since that will be // blocked until a user interaction. So resolve the Promise now. fullyLoaded.resolve(); } this.loadEventManager_.listenOnce(mediaElement, 'error', () => { fullyLoaded.reject(this.videoErrorToShakaError_()); }); const timeout = new Promise((resolve, reject) => { const timer = new shaka.util.Timer(reject); timer.tickAfter(this.config_.streaming.loadTimeout); }); await Promise.race([ fullyLoaded, timeout, ]); const isLive = this.isLive(); if ((isLive && ((this.config_.streaming.liveSync && this.config_.streaming.liveSync.enabled) || this.config_.streaming.liveSync.panicMode)) || this.config_.streaming.vodDynamicPlaybackRate) { const onTimeUpdate = () => this.onTimeUpdate_(); this.loadEventManager_.listen(mediaElement, 'timeupdate', onTimeUpdate); } if (!isLive) { const onVideoProgress = () => this.onVideoProgress_(); this.loadEventManager_.listen( mediaElement, 'timeupdate', onVideoProgress); this.onVideoProgress_(); } if (this.adManager_) { this.adManager_.onManifestUpdated(isLive); // There is no good way to detect when the manifest has been updated, // so we use seekRange().end so we can tell when it has been updated. if (isLive) { let prevSeekRangeEnd = this.seekRange().end; this.loadEventManager_.listen(mediaElement, 'progress', () => { const newSeekRangeEnd = this.seekRange().end; if (prevSeekRangeEnd != newSeekRangeEnd) { this.adManager_.onManifestUpdated(this.isLive()); prevSeekRangeEnd = newSeekRangeEnd; } }); } } this.fullyLoaded_ = true; } /** * This method setup the preferred audio using src=.. * * @private */ setupPreferredAudioOnSrc_() { const preferredAudioLanguage = this.config_.preferredAudioLanguage; // If the user has not selected a preference, the browser preference is // left. if (preferredAudioLanguage == '') { return; } const preferredVariantRole = this.config_.preferredVariantRole; this.selectAudioLanguage(preferredAudioLanguage, preferredVariantRole); } /** * This method setup the preferred text using src=. * * @private */ setupPreferredTextOnSrc_() { const preferredTextLanguage = this.config_.preferredTextLanguage; // If the user has not selected a preference, the browser preference is // left. if (preferredTextLanguage == '') { return; } const preferForcedSubs = this.config_.preferForcedSubs; const preferredTextRole = this.config_.preferredTextRole; this.selectTextLanguage(preferredTextLanguage, preferredTextRole, preferForcedSubs); } /** * We're looking for metadata tracks to process id3 tags. One of the uses is * for ad info on LIVE streams * * @param {!TextTrack} track * @private */ processTimedMetadataSrcEqls_(track) { if (track.kind != 'metadata') { return; } // Hidden mode is required for the cuechange event to launch correctly track.mode = 'hidden'; this.loadEventManager_.listen(track, 'cuechange', () => { if (!track.activeCues) { return; } /** @type {!Array.<shaka.extern.Interstitial>} */ const interstitials = []; for (const cue of track.activeCues) { this.dispatchMetadataEvent_(cue.startTime, cue.endTime, cue.type, cue.value); if (this.adManager_) { this.adManager_.onCueMetadataChange(cue.value); } if (cue.type == 'com.apple.quicktime.HLS' && cue.startTime != null) { let interstitial = interstitials.find((i) => { return i.startTime == cue.startTime && i.endTime == cue.endTime; }); if (!interstitial) { interstitial = /** @type {shaka.extern.Interstitial} */ ({ startTime: cue.startTime, endTime: cue.endTime, values: [], }); interstitials.push(interstitial); } interstitial.values.push(cue.value); } } for (const interstitial of interstitials) { const isValidInterstitial = interstitial.values.some((value) => { return value.key == 'X-ASSET-URI' || value.key == 'X-ASSET-LIST'; }); if (!isValidInterstitial) { continue; } if (this.adManager_) { // It seems that CUE is natively omitted, by default we use CUE=ONCE // to avoid repeating them. interstitial.values.push({ key: 'CUE', description: '', data: 'ONCE', mimeType: null, pictureType: null, }); goog.asserts.assert(this.video_, 'Must have video'); this.adManager_.onInterstitialMetadata( this, this.video_, interstitial); } } }); // In Safari the initial assignment does not always work, so we schedule // this process to be repeated several times to ensure that it has been put // in the correct mode. const timer = new shaka.util.Timer(() => { const textTracks = this.getMetadataTracks_(); for (const textTrack of textTracks) { textTrack.mode = 'hidden'; } }).tickNow().tickAfter(0.5); this.cleanupOnUnload_.push(() => { timer.stop(); }); } /** * @param {!Array.<shaka.extern.ID3Metadata>} metadata * @param {number} offset * @param {?number} segmentEndTime * @private */ processTimedMetadataMediaSrc_(metadata, offset, segmentEndTime) { for (const sample of metadata) { if (sample.data && sample.cueTime && sample.frames) { const start = sample.cueTime + offset; let end = segmentEndTime; // This can happen when the ID3 info arrives in a previous segment. if (end && start > end) { end = start; } const metadataType = 'org.id3'; for (const frame of sample.frames) { const payload = frame; this.dispatchMetadataEvent_(start, end, metadataType, payload); } if (this.adManager_) { this.adManager_.onHlsTimedMetadata(sample, start); } } } } /** * Construct and fire a Player.Metadata event * * @param {number} startTime * @param {?number} endTime * @param {string} metadataType * @param {shaka.extern.MetadataFrame} payload * @private */ dispatchMetadataEvent_(startTime, endTime, metadataType, payload) { goog.asserts.assert(!endTime || startTime <= endTime, 'Metadata start time should be less or equal to the end time!'); const eventName = shaka.util.FakeEvent.EventName.Metadata; const data = new Map() .set('startTime', startTime) .set('endTime', endTime) .set('metadataType', metadataType) .set('payload', payload); this.dispatchEvent(shaka.Player.makeEvent_(eventName, data)); } /** * Set the mode on a chapters track so that it loads. * * @param {?TextTrack} track * @private */ activateChaptersTrack_(track) { if (!track || track.kind != 'chapters') { return; } // Hidden mode is required for the cuechange event to launch correctly and // get the cues and the activeCues track.mode = 'hidden'; // In Safari the initial assignment does not always work, so we schedule // this process to be repeated several times to ensure that it has been put // in the correct mode. const timer = new shaka.util.Timer(() => { track.mode = 'hidden'; }).tickNow().tickAfter(0.5); this.cleanupOnUnload_.push(() => { timer.stop(); }); } /** * Releases all of the mutexes of the player. Meant for use by the tests. * @export */ releaseAllMutexes() { this.mutex_.releaseAll(); } /** * Create a new DrmEngine instance. This may be replaced by tests to create * fake instances. Configuration and initialization will be handled after * |createDrmEngine|. * * @param {shaka.media.DrmEngine.PlayerInterface} playerInterface * @return {!shaka.media.DrmEngine} */ createDrmEngine(playerInterface) { return new shaka.media.DrmEngine(playerInterface); } /** * Creates a new instance of NetworkingEngine. This can be replaced by tests * to create fake instances instead. * * @param {(function():?shaka.media.PreloadManager)=} getPreloadManager * @return {!shaka.net.NetworkingEngine} */ createNetworkingEngine(getPreloadManager) { if (!getPreloadManager) { getPreloadManager = () => null; } const getAbrManager = () => { if (getPreloadManager()) { return getPreloadManager().getAbrManager(); } else { return this.abrManager_; } }; const getParser = () => { if (getPreloadManager()) { return getPreloadManager().getParser(); } else { return this.parser_; } }; const lateQueue = (fn) => { if (getPreloadManager()) { getPreloadManager().addQueuedOperation(true, fn); } else { fn(); } }; const dispatchEvent = (event) => { if (getPreloadManager()) { getPreloadManager().dispatchEvent(event); } else { this.dispatchEvent(event); } }; const getStats = () => { if (getPreloadManager()) { return getPreloadManager().getStats(); } else { return this.stats_; } }; /** @type {shaka.net.NetworkingEngine.onProgressUpdated} */ const onProgressUpdated_ = (deltaTimeMs, bytesDownloaded, allowSwitch, request) => { // In some situations, such as during offline storage, the abr manager // might not yet exist. Therefore, we need to check if abr manager has // been initialized before using it. const abrManager = getAbrManager(); if (abrManager) { abrManager.segmentDownloaded(deltaTimeMs, bytesDownloaded, allowSwitch, request); } }; /** @type {shaka.net.NetworkingEngine.OnHeadersReceived} */ const onHeadersReceived_ = (headers, request, requestType) => { // Release a 'downloadheadersreceived' event. const name = shaka.util.FakeEvent.EventName.DownloadHeadersReceived; const data = new Map() .set('headers', headers) .set('request', request) .set('requestType', requestType); dispatchEvent(shaka.Player.makeEvent_(name, data)); lateQueue(() => { if (this.cmsdManager_) { this.cmsdManager_.processHeaders(headers); } }); }; /** @type {shaka.net.NetworkingEngine.OnDownloadFailed} */ const onDownloadFailed_ = (request, error, httpResponseCode, aborted) => { // Release a 'downloadfailed' event. const name = shaka.util.FakeEvent.EventName.DownloadFailed; const data = new Map() .set('request', request) .set('error', error) .set('httpResponseCode', httpResponseCode) .set('aborted', aborted); dispatchEvent(shaka.Player.makeEvent_(name, data)); }; /** @type {shaka.net.NetworkingEngine.OnRequest} */ const onRequest_ = (type, request, context) => { lateQueue(() => { this.cmcdManager_.applyData(type, request, context); }); }; /** @type {shaka.net.NetworkingEngine.OnRetry} */ const onRetry_ = (type, context, newUrl, oldUrl) => { const parser = getParser(); if (parser && parser.banLocation) { parser.banLocation(oldUrl); } }; /** @type {shaka.net.NetworkingEngine.OnResponse} */ const onResponse_ = (type, response, context) => { if (response.data) { const bytesDownloaded = response.data.byteLength; const stats = getStats(); if (stats) { stats.addBytesDownloaded(bytesDownloaded); if (type === shaka.net.NetworkingEngine.RequestType.MANIFEST) { stats.setManifestSize(bytesDownloaded); } } } }; return new shaka.net.NetworkingEngine( onProgressUpdated_, onHeadersReceived_, onDownloadFailed_, onRequest_, onRetry_, onResponse_); } /** * Creates a new instance of Playhead. This can be replaced by tests to * create fake instances instead. * * @param {?number} startTime * @return {!shaka.media.Playhead} */ createPlayhead(startTime) { goog.asserts.assert(this.manifest_, 'Must have manifest'); goog.asserts.assert(this.video_, 'Must have video'); return new shaka.media.MediaSourcePlayhead( this.video_, this.manifest_, this.config_.streaming, startTime, () => this.onSeek_(), (event) => this.dispatchEvent(event)); } /** * Create the observers for MSE playback. These observers are responsible for * notifying the app and player of specific events during MSE playback. * * @param {number} startTime * @return {!shaka.media.PlayheadObserverManager} * @private */ createPlayheadObserversForMSE_(startTime) { goog.asserts.assert(this.manifest_, 'Must have manifest'); goog.asserts.assert(this.regionTimeline_, 'Must have region timeline'); goog.asserts.assert(this.video_, 'Must have video element'); const startsPastZero = this.isLive() || startTime > 0; // Create the region observer. This will allow us to notify the app when we // move in and out of timeline regions. const regionObserver = new shaka.media.RegionObserver( this.regionTimeline_, startsPastZero); regionObserver.addEventListener('enter', (event) => { /** @type {shaka.extern.TimelineRegionInfo} */ const region = event['region']; this.onRegionEvent_( shaka.util.FakeEvent.EventName.TimelineRegionEnter, region); }); regionObserver.addEventListener('exit', (event) => { /** @type {shaka.extern.TimelineRegionInfo} */ const region = event['region']; this.onRegionEvent_( shaka.util.FakeEvent.EventName.TimelineRegionExit, region); }); regionObserver.addEventListener('skip', (event) => { /** @type {shaka.extern.TimelineRegionInfo} */ const region = event['region']; /** @type {boolean} */ const seeking = event['seeking']; // If we are seeking, we don't want to surface the enter/exit events since // they didn't play through them. if (!seeking) { this.onRegionEvent_( shaka.util.FakeEvent.EventName.TimelineRegionEnter, region); this.onRegionEvent_( shaka.util.FakeEvent.EventName.TimelineRegionExit, region); } }); // Now that we have all our observers, create a manager for them. const manager = new shaka.media.PlayheadObserverManager(this.video_); manager.manage(regionObserver); if (this.qualityObserver_) { manager.manage(this.qualityObserver_); } return manager; } /** * Initialize and start the buffering system (observer and timer) so that we * can monitor our buffer lead during playback. * * @param {!HTMLMediaElement} mediaElement * @param {number} rebufferingGoal * @private */ startBufferManagement_(mediaElement, rebufferingGoal) { goog.asserts.assert( !this.bufferObserver_, 'No buffering observer should exist before initialization.'); goog.asserts.assert( !this.bufferPoller_, 'No buffer timer should exist before initialization.'); // Give dummy values, will be updated below. this.bufferObserver_ = new shaka.media.BufferingObserver(1, 2); // Force us back to a buffering state. This ensure everything is starting in // the same state. this.bufferObserver_.setState(shaka.media.BufferingObserver.State.STARVING); this.updateBufferingSettings_(rebufferingGoal); this.updateBufferState_(); this.bufferPoller_ = new shaka.util.Timer(() => { this.pollBufferState_(); }).tickEvery(/* seconds= */ 0.25); this.loadEventManager_.listen(mediaElement, 'waiting', (e) => this.pollBufferState_()); this.loadEventManager_.listen(mediaElement, 'stalled', (e) => this.pollBufferState_()); this.loadEventManager_.listen(mediaElement, 'canplaythrough', (e) => this.pollBufferState_()); this.loadEventManager_.listen(mediaElement, 'progress', (e) => this.pollBufferState_()); } /** * Updates the buffering thresholds based on the new rebuffering goal. * * @param {number} rebufferingGoal * @private */ updateBufferingSettings_(rebufferingGoal) { // The threshold to transition back to satisfied when starving. const starvingThreshold = rebufferingGoal; // The threshold to transition into starving when satisfied. // We use a "typical" threshold, unless the rebufferingGoal is unusually // low. // Then we force the value down to half the rebufferingGoal, since // starvingThreshold must be strictly larger than satisfiedThreshold for the // logic in BufferingObserver to work correctly. const satisfiedThreshold = Math.min( shaka.Player.TYPICAL_BUFFERING_THRESHOLD_, rebufferingGoal / 2); this.bufferObserver_.setThresholds(starvingThreshold, satisfiedThreshold); } /** * This method is called periodically to check what the buffering observer * says so that we can update the rest of the buffering behaviours. * * @private */ pollBufferState_() { goog.asserts.assert( this.video_, 'Need a media element to update the buffering observer'); goog.asserts.assert( this.bufferObserver_, 'Need a buffering observer to update'); let bufferedToEnd; switch (this.loadMode_) { case shaka.Player.LoadMode.SRC_EQUALS: bufferedToEnd = this.isBufferedToEndSrc_(); break; case shaka.Player.LoadMode.MEDIA_SOURCE: bufferedToEnd = this.isBufferedToEndMS_(); break; default: bufferedToEnd = false; break; } const bufferLead = shaka.media.TimeRangesUtils.bufferedAheadOf( this.video_.buffered, this.video_.currentTime); const stateChanged = this.bufferObserver_.update(bufferLead, bufferedToEnd); // If the state changed, we need to surface the event. if (stateChanged) { this.updateBufferState_(); } } /** * Create a new media source engine. This will ONLY be replaced by tests as a * way to inject fake media source engine instances. * * @param {!HTMLMediaElement} mediaElement * @param {!shaka.extern.TextDisplayer} textDisplayer * @param {!shaka.media.MediaSourceEngine.PlayerInterface} playerInterface * @param {shaka.lcevc.Dec} lcevcDec * * @return {!shaka.media.MediaSourceEngine} */ createMediaSourceEngine(mediaElement, textDisplayer, playerInterface, lcevcDec) { return new shaka.media.MediaSourceEngine( mediaElement, textDisplayer, playerInterface, lcevcDec); } /** * Create a new CMCD manager. * * @private */ createCmcd_() { /** @type {shaka.util.CmcdManager.PlayerInterface} */ const playerInterface = { getBandwidthEstimate: () => this.abrManager_ ? this.abrManager_.getBandwidthEstimate() : NaN, getBufferedInfo: () => this.getBufferedInfo(), getCurrentTime: () => this.video_ ? this.video_.currentTime : 0, getPlaybackRate: () => this.getPlaybackRate(), getNetworkingEngine: () => this.getNetworkingEngine(), getVariantTracks: () => this.getVariantTracks(), isLive: () => this.isLive(), }; return new shaka.util.CmcdManager(playerInterface, this.config_.cmcd); } /** * Create a new CMSD manager. * * @private */ createCmsd_() { return new shaka.util.CmsdManager(this.config_.cmsd); } /** * Creates a new instance of StreamingEngine. This can be replaced by tests * to create fake instances instead. * * @return {!shaka.media.StreamingEngine} */ createStreamingEngine() { goog.asserts.assert( this.abrManager_ && this.mediaSourceEngine_ && this.manifest_, 'Must not be destroyed'); /** @type {shaka.media.StreamingEngine.PlayerInterface} */ const playerInterface = { getPresentationTime: () => this.playhead_ ? this.playhead_.getTime() : 0, getBandwidthEstimate: () => this.abrManager_.getBandwidthEstimate(), getPlaybackRate: () => this.getPlaybackRate(), mediaSourceEngine: this.mediaSourceEngine_, netEngine: this.networkingEngine_, onError: (error) => this.onError_(error), onEvent: (event) => this.dispatchEvent(event), onManifestUpdate: () => this.onManifestUpdate_(), onSegmentAppended: (reference, stream) => { this.onSegmentAppended_( reference.startTime, reference.endTime, stream.type, stream.codecs.includes(',')); if (this.abrManager_ && stream.fastSwitching && reference.isPartial() && reference.isLastPartial()) { this.abrManager_.trySuggestStreams(); } }, onInitSegmentAppended: (position, initSegment) => { const mediaQuality = initSegment.getMediaQuality(); if (mediaQuality && this.qualityObserver_) { this.qualityObserver_.addMediaQualityChange(mediaQuality, position); } }, beforeAppendSegment: (contentType, segment) => { return this.drmEngine_.parseInbandPssh(contentType, segment); }, onMetadata: (metadata, offset, endTime) => { this.processTimedMetadataMediaSrc_(metadata, offset, endTime); }, disableStream: (stream, time) => this.disableStream(stream, time), }; return new shaka.media.StreamingEngine(this.manifest_, playerInterface); } /** * Changes configuration settings on the Player. This checks the names of * keys and the types of values to avoid coding errors. If there are errors, * this logs them to the console and returns false. Correct fields are still * applied even if there are other errors. You can pass an explicit * <code>undefined</code> value to restore the default value. This has two * modes of operation: * * <p> * First, this can be passed a single "plain" object. This object should * follow the {@link shaka.extern.PlayerConfiguration} object. Not all fields * need to be set; unset fields retain their old values. * * <p> * Second, this can be passed two arguments. The first is the name of the key * to set. This should be a '.' separated path to the key. For example, * <code>'streaming.alwaysStreamText'</code>. The second argument is the * value to set. * * @param {string|!Object} config This should either be a field name or an * object. * @param {*=} value In the second mode, this is the value to set. * @return {boolean} True if the passed config object was valid, false if * there were invalid entries. * @export */ configure(config, value) { const Platform = shaka.util.Platform; goog.asserts.assert(this.config_, 'Config must not be null!'); goog.asserts.assert(typeof(config) == 'object' || arguments.length == 2, 'String configs should have values!'); // ('fieldName', value) format if (arguments.length == 2 && typeof(config) == 'string') { config = shaka.util.ConfigUtils.convertToConfigObject(config, value); } goog.asserts.assert(typeof(config) == 'object', 'Should be an object!'); // Deprecate 'streaming.forceTransmuxTS' configuration. if (config['streaming'] && 'forceTransmuxTS' in config['streaming']) { shaka.Deprecate.deprecateFeature(5, 'streaming.forceTransmuxTS configuration', 'Please Use mediaSource.forceTransmux instead.'); config['mediaSource']['mediaSource'] = config['streaming']['forceTransmuxTS']; delete config['streaming']['forceTransmuxTS']; } // Deprecate 'streaming.forceTransmux' configuration. if (config['streaming'] && 'forceTransmux' in config['streaming']) { shaka.Deprecate.deprecateFeature(5, 'streaming.forceTransmux configuration', 'Please Use mediaSource.forceTransmux instead.'); config['mediaSource']['mediaSource'] = config['streaming']['forceTransmux']; delete config['streaming']['forceTransmux']; } // Deprecate 'streaming.useNativeHlsOnSafari' configuration. if (config['streaming'] && 'useNativeHlsOnSafari' in config['streaming']) { shaka.Deprecate.deprecateFeature(5, 'streaming.useNativeHlsOnSafari configuration', 'Please Use streaming.useNativeHlsForFairPlay or ' + 'streaming.preferNativeHls instead.'); config['streaming']['preferNativeHls'] = config['streaming']['useNativeHlsOnSafari'] && Platform.isApple(); delete config['streaming']['useNativeHlsOnSafari']; } // Deprecate 'streaming.liveSync' boolean configuration. if (config['streaming'] && typeof config['streaming']['liveSync'] == 'boolean') { shaka.Deprecate.deprecateFeature(5, 'streaming.liveSync', 'Please Use streaming.liveSync.enabled instead.'); const liveSyncValue = config['streaming']['liveSync']; config['streaming']['liveSync'] = {}; config['streaming']['liveSync']['enabled'] = liveSyncValue; } // map liveSyncMinLatency and liveSyncMaxLatency to liveSync.targetLatency // if liveSync.targetLatency isn't set. if (config['streaming'] && (!config['streaming']['liveSync'] || !('targetLatency' in config['streaming']['liveSync'])) && ('liveSyncMinLatency' in config['streaming'] || 'liveSyncMaxLatency' in config['streaming'])) { const min = config['streaming']['liveSyncMinLatency'] || 0; const max = config['streaming']['liveSyncMaxLatency'] || 1; const mid = Math.abs(max - min) / 2; config['streaming']['liveSync'] = config['streaming']['liveSync'] || {}; config['streaming']['liveSync']['targetLatency'] = min + mid; config['streaming']['liveSync']['targetLatencyTolerance'] = mid; } // Deprecate 'streaming.liveSyncMaxLatency' configuration. if (config['streaming'] && 'liveSyncMaxLatency' in config['streaming']) { shaka.Deprecate.deprecateFeature(5, 'streaming.liveSyncMaxLatency', 'Please Use streaming.liveSync.targetLatency and ' + 'streaming.liveSync.targetLatencyTolerance instead. ' + 'Or, set the values in your DASH manifest'); delete config['streaming']['liveSyncMaxLatency']; } // Deprecate 'streaming.liveSyncMinLatency' configuration. if (config['streaming'] && 'liveSyncMinLatency' in config['streaming']) { shaka.Deprecate.deprecateFeature(5, 'streaming.liveSyncMinLatency', 'Please Use streaming.liveSync.targetLatency and ' + 'streaming.liveSync.targetLatencyTolerance instead. ' + 'Or, set the values in your DASH manifest'); delete config['streaming']['liveSyncMinLatency']; } // Deprecate 'streaming.liveSyncTargetLatency' configuration. if (config['streaming'] && 'liveSyncTargetLatency' in config['streaming']) { shaka.Deprecate.deprecateFeature(5, 'streaming.liveSyncTargetLatency', 'Please Use streaming.liveSync.targetLatency instead.'); config['streaming']['liveSync'] = config['streaming']['liveSync'] || {}; config['streaming']['liveSync']['targetLatency'] = config['streaming']['liveSyncTargetLatency']; delete config['streaming']['liveSyncTargetLatency']; } // Deprecate 'streaming.liveSyncTargetLatencyTolerance' configuration. if (config['streaming'] && 'liveSyncTargetLatencyTolerance' in config['streaming']) { shaka.Deprecate.deprecateFeature(5, 'streaming.liveSyncTargetLatencyTolerance', 'Please Use streaming.liveSync.targetLatencyTolerance instead.'); config['streaming']['liveSync'] = config['streaming']['liveSync'] || {}; config['streaming']['liveSync']['targetLatencyTolerance'] = config['streaming']['liveSyncTargetLatencyTolerance']; delete config['streaming']['liveSyncTargetLatencyTolerance']; } // Deprecate 'streaming.liveSyncPlaybackRate' configuration. if (config['streaming'] && 'liveSyncPlaybackRate' in config['streaming']) { shaka.Deprecate.deprecateFeature(5, 'streaming.liveSyncPlaybackRate', 'Please Use streaming.liveSync.maxPlaybackRate instead.'); config['streaming']['liveSync'] = config['streaming']['liveSync'] || {}; config['streaming']['liveSync']['maxPlaybackRate'] = config['streaming']['liveSyncPlaybackRate']; delete config['streaming']['liveSyncPlaybackRate']; } // Deprecate 'streaming.liveSyncMinPlaybackRate' configuration. if (config['streaming'] && 'liveSyncMinPlaybackRate' in config['streaming']) { shaka.Deprecate.deprecateFeature(5, 'streaming.liveSyncMinPlaybackRate', 'Please Use streaming.liveSync.minPlaybackRate instead.'); config['streaming']['liveSync'] = config['streaming']['liveSync'] || {}; config['streaming']['liveSync']['minPlaybackRate'] = config['streaming']['liveSyncMinPlaybackRate']; delete config['streaming']['liveSyncMinPlaybackRate']; } // Deprecate 'streaming.liveSyncPanicMode' configuration. if (config['streaming'] && 'liveSyncPanicMode' in config['streaming']) { shaka.Deprecate.deprecateFeature(5, 'streaming.liveSyncPanicMode', 'Please Use streaming.liveSync.panicMode instead.'); config['streaming']['liveSync'] = config['streaming']['liveSync'] || {}; config['streaming']['liveSync']['panicMode'] = config['streaming']['liveSyncPanicMode']; delete config['streaming']['liveSyncPanicMode']; } // Deprecate 'streaming.liveSyncPanicThreshold' configuration. if (config['streaming'] && 'liveSyncPanicThreshold' in config['streaming']) { shaka.Deprecate.deprecateFeature(5, 'streaming.liveSyncPanicThreshold', 'Please Use streaming.liveSync.panicThreshold instead.'); config['streaming']['liveSync'] = config['streaming']['liveSync'] || {}; config['streaming']['liveSync']['panicThreshold'] = config['streaming']['liveSyncPanicThreshold']; delete config['streaming']['liveSyncPanicThreshold']; } // Deprecate 'mediaSource.sourceBufferExtraFeatures' configuration. if (config['mediaSource'] && 'sourceBufferExtraFeatures' in config['mediaSource']) { shaka.Deprecate.deprecateFeature(5, 'mediaSource.sourceBufferExtraFeatures configuration', 'Please Use mediaSource.addExtraFeaturesToSourceBuffer() instead.'); const sourceBufferExtraFeatures = config['mediaSource']['sourceBufferExtraFeatures']; config['mediaSource']['addExtraFeaturesToSourceBuffer'] = () => { return sourceBufferExtraFeatures; }; delete config['mediaSource']['sourceBufferExtraFeatures']; } // If lowLatencyMode is enabled, and inaccurateManifestTolerance and // rebufferingGoal and segmentPrefetchLimit and baseDelay and // autoCorrectDrift and maxDisabledTime are not specified, set // inaccurateManifestTolerance to 0 and rebufferingGoal to 0.01 and // segmentPrefetchLimit to 2 and updateIntervalSeconds to 0.1 and and // baseDelay to 100 and autoCorrectDrift to false and maxDisabledTime // to 1 by default for low latency streaming. if (config['streaming'] && config['streaming']['lowLatencyMode']) { if (config['streaming']['inaccurateManifestTolerance'] == undefined) { config['streaming']['inaccurateManifestTolerance'] = 0; } if (config['streaming']['rebufferingGoal'] == undefined) { config['streaming']['rebufferingGoal'] = 0.01; } if (config['streaming']['segmentPrefetchLimit'] == undefined) { config['streaming']['segmentPrefetchLimit'] = 2; } if (config['streaming']['updateIntervalSeconds'] == undefined) { config['streaming']['updateIntervalSeconds'] = 0.1; } if (config['streaming']['maxDisabledTime'] == undefined) { config['streaming']['maxDisabledTime'] = 1; } if (config['streaming']['retryParameters'] == undefined) { config['streaming']['retryParameters'] = {}; } if (config['streaming']['retryParameters']['baseDelay'] == undefined) { config['streaming']['retryParameters']['baseDelay'] = 100; } if (config['manifest'] == undefined) { config['manifest'] = {}; } if (config['manifest']['dash'] == undefined) { config['manifest']['dash'] = {}; } if (config['manifest']['dash']['autoCorrectDrift'] == undefined) { config['manifest']['dash']['autoCorrectDrift'] = false; } if (config['manifest']['retryParameters'] == undefined) { config['manifest']['retryParameters'] = {}; } if (config['manifest']['retryParameters']['baseDelay'] == undefined) { config['manifest']['retryParameters']['baseDelay'] = 100; } if (config['drm'] == undefined) { config['drm'] = {}; } if (config['drm']['retryParameters'] == undefined) { config['drm']['retryParameters'] = {}; } if (config['drm']['retryParameters']['baseDelay'] == undefined) { config['drm']['retryParameters']['baseDelay'] = 100; } } const ret = shaka.util.PlayerConfiguration.mergeConfigObjects( this.config_, config, this.defaultConfig_()); this.applyConfig_(); return ret; } /** * Apply config changes. * @private */ applyConfig_() { this.manifestFilterer_ = new shaka.media.ManifestFilterer( this.config_, this.maxHwRes_, this.drmEngine_); if (this.parser_) { const manifestConfig = shaka.util.ObjectUtils.cloneObject(this.config_.manifest); // Don't read video segments if the player is attached to an audio element if (this.video_ && this.video_.nodeName === 'AUDIO') { manifestConfig.disableVideo = true; } this.parser_.configure(manifestConfig); } if (this.drmEngine_) { this.drmEngine_.configure(this.config_.drm); } if (this.streamingEngine_) { this.streamingEngine_.configure(this.config_.streaming); // Need to apply the restrictions. // this.filterManifestWithRestrictions_() may throw. try { if (this.loadMode_ != shaka.Player.LoadMode.DESTROYED) { if (this.manifestFilterer_.filterManifestWithRestrictions( this.manifest_)) { this.onTracksChanged_(); } } } catch (error) { this.onError_(error); } if (this.abrManager_) { // Update AbrManager variants to match these new settings. this.updateAbrManagerVariants_(); } // If the streams we are playing are restricted, we need to switch. const activeVariant = this.streamingEngine_.getCurrentVariant(); if (activeVariant) { if (!activeVariant.allowedByApplication || !activeVariant.allowedByKeySystem) { shaka.log.debug('Choosing new variant after changing configuration'); this.chooseVariantAndSwitch_(); } } } if (this.networkingEngine_) { this.networkingEngine_.setForceHTTP(this.config_.streaming.forceHTTP); this.networkingEngine_.setForceHTTPS(this.config_.streaming.forceHTTPS); } if (this.mediaSourceEngine_) { this.mediaSourceEngine_.configure(this.config_.mediaSource); const {segmentRelativeVttTiming} = this.config_.manifest; this.mediaSourceEngine_.setSegmentRelativeVttTiming( segmentRelativeVttTiming); const textDisplayerFactory = this.config_.textDisplayFactory; if (this.lastTextFactory_ != textDisplayerFactory) { const displayer = textDisplayerFactory(); if (displayer.configure) { displayer.configure(this.config_.textDisplayer); } else { shaka.Deprecate.deprecateFeature(5, 'Text displayer w/ configure', 'Text displayer should have a "configure" method!'); } this.mediaSourceEngine_.setTextDisplayer(displayer); this.lastTextFactory_ = textDisplayerFactory; if (this.streamingEngine_) { // Reload the text stream, so the cues will load again. this.streamingEngine_.reloadTextStream(); } } else { const displayer = this.mediaSourceEngine_.getTextDisplayer(); if (displayer.configure) { displayer.configure(this.config_.textDisplayer); } } } if (this.abrManager_) { this.abrManager_.configure(this.config_.abr); // Simply enable/disable ABR with each call, since multiple calls to these // methods have no effect. if (this.config_.abr.enabled) { this.abrManager_.enable(); } else { this.abrManager_.disable(); } this.onAbrStatusChanged_(); } if (this.bufferObserver_) { let rebufferThreshold = this.config_.streaming.rebufferingGoal; if (this.manifest_) { rebufferThreshold = Math.max(rebufferThreshold, this.manifest_.minBufferTime); } this.updateBufferingSettings_(rebufferThreshold); } if (this.manifest_) { shaka.Player.applyPlayRange_(this.manifest_.presentationTimeline, this.config_.playRangeStart, this.config_.playRangeEnd); } if (this.adManager_) { this.adManager_.configure(this.config_.ads); } if (this.cmcdManager_) { this.cmcdManager_.configure(this.config_.cmcd); } if (this.cmsdManager_) { this.cmsdManager_.configure(this.config_.cmsd); } } /** * Return a copy of the current configuration. Modifications of the returned * value will not affect the Player's active configuration. You must call * <code>player.configure()</code> to make changes. * * @return {shaka.extern.PlayerConfiguration} * @export */ getConfiguration() { goog.asserts.assert(this.config_, 'Config must not be null!'); const ret = this.defaultConfig_(); shaka.util.PlayerConfiguration.mergeConfigObjects( ret, this.config_, this.defaultConfig_()); return ret; } /** * Return a copy of the current non default configuration. Modifications of * the returned value will not affect the Player's active configuration. * You must call <code>player.configure()</code> to make changes. * * @return {!Object} * @export */ getNonDefaultConfiguration() { goog.asserts.assert(this.config_, 'Config must not be null!'); const ret = this.defaultConfig_(); shaka.util.PlayerConfiguration.mergeConfigObjects( ret, this.config_, this.defaultConfig_()); return shaka.util.ConfigUtils.getDifferenceFromConfigObjects( this.config_, this.defaultConfig_()); } /** * Return a reference to the current configuration. Modifications to the * returned value will affect the Player's active configuration. This method * is not exported as sharing configuration with external objects is not * supported. * * @return {shaka.extern.PlayerConfiguration} */ getSharedConfiguration() { goog.asserts.assert( this.config_, 'Cannot call getSharedConfiguration after call destroy!'); return this.config_; } /** * Returns the ratio of video length buffered compared to buffering Goal * @return {number} * @export */ getBufferFullness() { if (this.video_) { const bufferedLength = this.video_.buffered.length; const bufferedEnd = bufferedLength ? this.video_.buffered.end(bufferedLength - 1) : 0; const bufferingGoal = this.getConfiguration().streaming.bufferingGoal; const lengthToBeBuffered = Math.min(this.video_.currentTime + bufferingGoal, this.seekRange().end); if (bufferedEnd >= lengthToBeBuffered) { return 1; } else if (bufferedEnd <= this.video_.currentTime) { return 0; } else if (bufferedEnd < lengthToBeBuffered) { return ((bufferedEnd - this.video_.currentTime) / (lengthToBeBuffered - this.video_.currentTime)); } } return 0; } /** * Reset configuration to default. * @export */ resetConfiguration() { goog.asserts.assert(this.config_, 'Cannot be destroyed'); // Remove the old keys so we remove open-ended dictionaries like drm.servers // but keeps the same object reference. for (const key in this.config_) { delete this.config_[key]; } shaka.util.PlayerConfiguration.mergeConfigObjects( this.config_, this.defaultConfig_(), this.defaultConfig_()); this.applyConfig_(); } /** * Get the current load mode. * * @return {shaka.Player.LoadMode} * @export */ getLoadMode() { return this.loadMode_; } /** * Get the current manifest type. * * @return {?string} * @export */ getManifestType() { if (!this.manifest_) { return null; } return this.manifest_.type; } /** * Get the media element that the player is currently using to play loaded * content. If the player has not loaded content, this will return * <code>null</code>. * * @return {HTMLMediaElement} * @export */ getMediaElement() { return this.video_; } /** * @return {shaka.net.NetworkingEngine} A reference to the Player's networking * engine. Applications may use this to make requests through Shaka's * networking plugins. * @export */ getNetworkingEngine() { return this.networkingEngine_; } /** * Get the uri to the asset that the player has loaded. If the player has not * loaded content, this will return <code>null</code>. * * @return {?string} * @export */ getAssetUri() { return this.assetUri_; } /** * Returns a shaka.ads.AdManager instance, responsible for Dynamic * Ad Insertion functionality. * * @return {shaka.extern.IAdManager} * @export */ getAdManager() { // NOTE: this clause is redundant, but it keeps the compiler from // inlining this function. Inlining leads to setting the adManager // not taking effect in the compiled build. // Closure has a @noinline flag, but apparently not all cases are // supported by it, and ours isn't. // If they expand support, we might be able to get rid of this // clause. if (!this.adManager_) { return null; } return this.adManager_; } /** * Get if the player is playing live content. If the player has not loaded * content, this will return <code>false</code>. * * @return {boolean} * @export */ isLive() { if (this.manifest_) { return this.manifest_.presentationTimeline.isLive(); } // For native HLS, the duration for live streams seems to be Infinity. if (this.video_ && this.video_.src) { return this.video_.duration == Infinity; } return false; } /** * Get if the player is playing in-progress content. If the player has not * loaded content, this will return <code>false</code>. * * @return {boolean} * @export */ isInProgress() { return this.manifest_ ? this.manifest_.presentationTimeline.isInProgress() : false; } /** * Check if the manifest contains only audio-only content. If the player has * not loaded content, this will return <code>false</code>. * * <p> * The player does not support content that contain more than one type of * variants (i.e. mixing audio-only, video-only, audio-video). Content will be * filtered to only contain one type of variant. * * @return {boolean} * @export */ isAudioOnly() { if (this.manifest_) { const variants = this.manifest_.variants; if (!variants.length) { return false; } // Note that if there are some audio-only variants and some audio-video // variants, the audio-only variants are removed during filtering. // Therefore if the first variant has no video, that's sufficient to say // it is audio-only content. return !variants[0].video; } else if (this.video_ && this.video_.src) { // If we have video track info, use that. It will be the least // error-prone way with native HLS. In contrast, videoHeight might be // unset until the first frame is loaded. Since isAudioOnly is queried // by the UI on the 'trackschanged' event, the videoTracks info should be // up-to-date. if (this.video_.videoTracks) { return this.video_.videoTracks.length == 0; } // We cast to the more specific HTMLVideoElement to access videoHeight. // This might be an audio element, though, in which case videoHeight will // be undefined at runtime. For audio elements, this will always return // true. const video = /** @type {HTMLVideoElement} */(this.video_); return video.videoHeight == 0; } else { return false; } } /** * Get the range of time (in seconds) that seeking is allowed. If the player * has not loaded content and the manifest is HLS, this will return a range * from 0 to 0. * * @return {{start: number, end: number}} * @export */ seekRange() { if (this.manifest_) { // With HLS lazy-loading, there were some situations where the manifest // had partially loaded, enough to move onto further load stages, but no // segments had been loaded, so the timeline is still unknown. // See: https://github.com/shaka-project/shaka-player/pull/4590 if (!this.fullyLoaded_ && this.manifest_.type == shaka.media.ManifestParser.HLS) { return {'start': 0, 'end': 0}; } const timeline = this.manifest_.presentationTimeline; return { 'start': timeline.getSeekRangeStart(), 'end': timeline.getSeekRangeEnd(), }; } // If we have loaded content with src=, we ask the video element for its // seekable range. This covers both plain mp4s and native HLS playbacks. if (this.video_ && this.video_.src) { const seekable = this.video_.seekable; if (seekable.length) { return { 'start': seekable.start(0), 'end': seekable.end(seekable.length - 1), }; } } return {'start': 0, 'end': 0}; } /** * Go to live in a live stream. * * @export */ goToLive() { if (this.isLive()) { this.video_.currentTime = this.seekRange().end; } else { shaka.log.warning('goToLive is for live streams!'); } } /** * Indicates if the player has fully loaded the stream. * * @return {boolean} * @export */ isFullyLoaded() { return this.fullyLoaded_; } /** * Get the key system currently used by EME. If EME is not being used, this * will return an empty string. If the player has not loaded content, this * will return an empty string. * * @return {string} * @export */ keySystem() { return shaka.media.DrmEngine.keySystem(this.drmInfo()); } /** * Get the drm info used to initialize EME. If EME is not being used, this * will return <code>null</code>. If the player is idle or has not initialized * EME yet, this will return <code>null</code>. * * @return {?shaka.extern.DrmInfo} * @export */ drmInfo() { return this.drmEngine_ ? this.drmEngine_.getDrmInfo() : null; } /** * Get the drm engine. * This method should only be used for testing. Applications SHOULD NOT * use this in production. * * @return {?shaka.media.DrmEngine} */ getDrmEngine() { return this.drmEngine_; } /** * Get the next known expiration time for any EME session. If the session * never expires, this will return <code>Infinity</code>. If there are no EME * sessions, this will return <code>Infinity</code>. If the player has not * loaded content, this will return <code>Infinity</code>. * * @return {number} * @export */ getExpiration() { return this.drmEngine_ ? this.drmEngine_.getExpiration() : Infinity; } /** * Returns the active sessions metadata * * @return {!Array.<shaka.extern.DrmSessionMetadata>} * @export */ getActiveSessionsMetadata() { return this.drmEngine_ ? this.drmEngine_.getActiveSessionsMetadata() : []; } /** * Gets a map of EME key ID to the current key status. * * @return {!Object<string, string>} * @export */ getKeyStatuses() { return this.drmEngine_ ? this.drmEngine_.getKeyStatuses() : {}; } /** * Check if the player is currently in a buffering state (has too little * content to play smoothly). If the player has not loaded content, this will * return <code>false</code>. * * @return {boolean} * @export */ isBuffering() { const State = shaka.media.BufferingObserver.State; return this.bufferObserver_ ? this.bufferObserver_.getState() == State.STARVING : false; } /** * Get the playback rate of what is playing right now. If we are using trick * play, this will return the trick play rate. * If no content is playing, this will return 0. * If content is buffering, this will return the expected playback rate once * the video starts playing. * * <p> * If the player has not loaded content, this will return a playback rate of * 0. * * @return {number} * @export */ getPlaybackRate() { if (!this.video_) { return 0; } return this.playRateController_ ? this.playRateController_.getRealRate() : 1; } /** * Enable trick play to skip through content without playing by repeatedly * seeking. For example, a rate of 2.5 would result in 2.5 seconds of content * being skipped every second. A negative rate will result in moving * backwards. * * <p> * If the player has not loaded content or is still loading content this will * be a no-op. Wait until <code>load</code> has completed before calling. * * <p> * Trick play will be canceled automatically if the playhead hits the * beginning or end of the seekable range for the content. * * @param {number} rate * @export */ trickPlay(rate) { // A playbackRate of 0 is used internally when we are in a buffering state, // and doesn't make sense for trick play. If you set a rate of 0 for trick // play, we will reject it and issue a warning. If it happens during a // test, we will fail the test through this assertion. goog.asserts.assert(rate != 0, 'Should never set a trick play rate of 0!'); if (rate == 0) { shaka.log.alwaysWarn('A trick play rate of 0 is unsupported!'); return; } this.trickPlayEventManager_.removeAll(); if (this.video_.paused) { // Our fast forward is implemented with playbackRate and needs the video // to be playing (to not be paused) to take immediate effect. // If the video is paused, "unpause" it. this.video_.play(); } this.playRateController_.set(rate); if (this.loadMode_ == shaka.Player.LoadMode.MEDIA_SOURCE) { this.abrManager_.playbackRateChanged(rate); this.streamingEngine_.setTrickPlay(Math.abs(rate) > 1); } if (this.isLive()) { this.trickPlayEventManager_.listen(this.video_, 'timeupdate', () => { const currentTime = this.video_.currentTime; const seekRange = this.seekRange(); const safeSeekOffset = this.config_.streaming.safeSeekOffset; // Cancel trick play if we hit the beginning or end of the seekable // (Sub-second accuracy not required here) if (rate > 0) { if (Math.floor(currentTime) >= Math.floor(seekRange.end)) { this.cancelTrickPlay(); } } else { if (Math.floor(currentTime) <= Math.floor(seekRange.start + safeSeekOffset)) { this.cancelTrickPlay(); } } }); } } /** * Cancel trick-play. If the player has not loaded content or is still loading * content this will be a no-op. * * @export */ cancelTrickPlay() { const defaultPlaybackRate = this.playRateController_.getDefaultRate(); if (this.loadMode_ == shaka.Player.LoadMode.SRC_EQUALS) { this.playRateController_.set(defaultPlaybackRate); } if (this.loadMode_ == shaka.Player.LoadMode.MEDIA_SOURCE) { this.playRateController_.set(defaultPlaybackRate); this.abrManager_.playbackRateChanged(defaultPlaybackRate); this.streamingEngine_.setTrickPlay(false); } this.trickPlayEventManager_.removeAll(); } /** * Return a list of variant tracks that can be switched to. * * <p> * If the player has not loaded content, this will return an empty list. * * @return {!Array.<shaka.extern.Track>} * @export */ getVariantTracks() { if (this.manifest_) { const currentVariant = this.streamingEngine_ ? this.streamingEngine_.getCurrentVariant() : null; const tracks = []; let activeTracks = 0; // Convert each variant to a track. for (const variant of this.manifest_.variants) { if (!shaka.util.StreamUtils.isPlayable(variant)) { continue; } const track = shaka.util.StreamUtils.variantToTrack(variant); track.active = variant == currentVariant; if (!track.active && activeTracks != 1 && currentVariant != null && variant.video == currentVariant.video && variant.audio == currentVariant.audio) { track.active = true; } if (track.active) { activeTracks++; } tracks.push(track); } goog.asserts.assert(activeTracks <= 1, 'It should only have one active track'); return tracks; } else if (this.video_ && this.video_.audioTracks) { // Safari's native HLS always shows a single element in videoTracks. // You can't use that API to change resolutions. But we can use // audioTracks to generate a variant list that is usable for changing // languages. const audioTracks = Array.from(this.video_.audioTracks); return audioTracks.map((audio) => shaka.util.StreamUtils.html5AudioTrackToTrack(audio)); } else { return []; } } /** * Return a list of text tracks that can be switched to. * * <p> * If the player has not loaded content, this will return an empty list. * * @return {!Array.<shaka.extern.Track>} * @export */ getTextTracks() { if (this.manifest_) { const currentTextStream = this.streamingEngine_ ? this.streamingEngine_.getCurrentTextStream() : null; const tracks = []; // Convert all selectable text streams to tracks. for (const text of this.manifest_.textStreams) { const track = shaka.util.StreamUtils.textStreamToTrack(text); track.active = text == currentTextStream; tracks.push(track); } return tracks; } else if (this.video_ && this.video_.src && this.video_.textTracks) { const textTracks = this.getFilteredTextTracks_(); const StreamUtils = shaka.util.StreamUtils; return textTracks.map((text) => StreamUtils.html5TextTrackToTrack(text)); } else { return []; } } /** * Return a list of image tracks that can be switched to. * * If the player has not loaded content, this will return an empty list. * * @return {!Array.<shaka.extern.Track>} * @export */ getImageTracks() { const StreamUtils = shaka.util.StreamUtils; let imageStreams = this.externalSrcEqualsThumbnailsStreams_; if (this.manifest_) { imageStreams = this.manifest_.imageStreams; } return imageStreams.map((image) => StreamUtils.imageStreamToTrack(image)); } /** * Returns Thumbnail objects for each thumbnail for a given image track ID. * * If the player has not loaded content, this will return a null. * * @param {number} trackId * @return {!Promise.<?Array<!shaka.extern.Thumbnail>>} * @export */ async getAllThumbnails(trackId) { if (this.loadMode_ != shaka.Player.LoadMode.MEDIA_SOURCE && this.loadMode_ != shaka.Player.LoadMode.SRC_EQUALS) { return null; } let imageStreams = this.externalSrcEqualsThumbnailsStreams_; if (this.manifest_) { imageStreams = this.manifest_.imageStreams; } const imageStream = imageStreams.find( (stream) => stream.id == trackId); if (!imageStream) { return null; } if (!imageStream.segmentIndex) { await imageStream.createSegmentIndex(); } const promises = []; imageStream.segmentIndex.forEachTopLevelReference((reference) => { const dimensions = this.parseTilesLayout_( reference.getTilesLayout() || imageStream.tilesLayout); if (dimensions) { const numThumbnails = dimensions.rows * dimensions.columns; const duration = reference.trueEndTime - reference.startTime; for (let i = 0; i < numThumbnails; i++) { const sampleTime = reference.startTime + duration * i / numThumbnails; promises.push(this.getThumbnails(trackId, sampleTime)); } } }); const thumbnails = await Promise.all(promises); return thumbnails.filter((t) => t); } /** * Parses a tiles layout. * * @param {string|undefined} tilesLayout * @return {?{ * columns: number, * rows: number * }} * @private */ parseTilesLayout_(tilesLayout) { if (!tilesLayout) { return null; } // This expression is used to detect one or more numbers (0-9) followed // by an x and after one or more numbers (0-9) const match = /(\d+)x(\d+)/.exec(tilesLayout); if (!match) { shaka.log.warning('Tiles layout does not contain a valid format ' + ' (columns x rows)'); return null; } const columns = parseInt(match[1], 10); const rows = parseInt(match[2], 10); return {columns, rows}; } /** * Return a Thumbnail object from a image track Id and time. * * If the player has not loaded content, this will return a null. * * @param {number} trackId * @param {number} time * @return {!Promise.<?shaka.extern.Thumbnail>} * @export */ async getThumbnails(trackId, time) { if (this.loadMode_ != shaka.Player.LoadMode.MEDIA_SOURCE && this.loadMode_ != shaka.Player.LoadMode.SRC_EQUALS) { return null; } let imageStreams = this.externalSrcEqualsThumbnailsStreams_; if (this.manifest_) { imageStreams = this.manifest_.imageStreams; } const imageStream = imageStreams.find( (stream) => stream.id == trackId); if (!imageStream) { return null; } if (!imageStream.segmentIndex) { await imageStream.createSegmentIndex(); } const referencePosition = imageStream.segmentIndex.find(time); if (referencePosition == null) { return null; } const reference = imageStream.segmentIndex.get(referencePosition); const dimensions = this.parseTilesLayout_( reference.getTilesLayout() || imageStream.tilesLayout); if (!dimensions) { return null; } const fullImageWidth = imageStream.width || 0; const fullImageHeight = imageStream.height || 0; let width = fullImageWidth / dimensions.columns; let height = fullImageHeight / dimensions.rows; const totalImages = dimensions.columns * dimensions.rows; const segmentDuration = reference.trueEndTime - reference.startTime; const thumbnailDuration = reference.getTileDuration() || (segmentDuration / totalImages); let thumbnailTime = reference.startTime; let positionX = 0; let positionY = 0; // If the number of images in the segment is greater than 1, we have to // find the correct image. For that we will return to the app the // coordinates of the position of the correct image. // Image search is always from left to right and top to bottom. // Note: The time between images within the segment is always // equidistant. // // Eg: Total images 5, tileLayout 5x1, segmentDuration 5, thumbnailTime 2 // positionX = 0.4 * fullImageWidth // positionY = 0 if (totalImages > 1) { const thumbnailPosition = Math.floor((time - reference.startTime) / thumbnailDuration); thumbnailTime = reference.startTime + (thumbnailPosition * thumbnailDuration); positionX = (thumbnailPosition % dimensions.columns) * width; positionY = Math.floor(thumbnailPosition / dimensions.columns) * height; } let sprite = false; const thumbnailSprite = reference.getThumbnailSprite(); if (thumbnailSprite) { sprite = true; height = thumbnailSprite.height; positionX = thumbnailSprite.positionX; positionY = thumbnailSprite.positionY; width = thumbnailSprite.width; } return { segment: reference, imageHeight: fullImageHeight, imageWidth: fullImageWidth, height: height, positionX: positionX, positionY: positionY, startTime: thumbnailTime, duration: thumbnailDuration, uris: reference.getUris(), width: width, sprite: sprite, }; } /** * Select a specific text track. <code>track</code> should come from a call to * <code>getTextTracks</code>. If the track is not found, this will be a * no-op. If the player has not loaded content, this will be a no-op. * * <p> * Note that <code>AdaptationEvents</code> are not fired for manual track * selections. * * @param {shaka.extern.Track} track * @export */ selectTextTrack(track) { if (this.manifest_ && this.streamingEngine_) { const stream = this.manifest_.textStreams.find( (stream) => stream.id == track.id); if (!stream) { shaka.log.error('No stream with id', track.id); return; } if (stream == this.streamingEngine_.getCurrentTextStream()) { shaka.log.debug('Text track already selected.'); return; } // Add entries to the history. this.addTextStreamToSwitchHistory_(stream, /* fromAdaptation= */ false); this.streamingEngine_.switchTextStream(stream); this.onTextChanged_(); // Workaround for // https://github.com/shaka-project/shaka-player/issues/1299 // When track is selected, back-propagate the language to // currentTextLanguage_. this.currentTextLanguage_ = stream.language; } else if (this.video_ && this.video_.src && this.video_.textTracks) { const textTracks = this.getFilteredTextTracks_(); for (const textTrack of textTracks) { if (shaka.util.StreamUtils.html5TrackId(textTrack) == track.id) { // Leave the track in 'hidden' if it's selected but not showing. textTrack.mode = this.isTextVisible_ ? 'showing' : 'hidden'; } else { // Safari allows multiple text tracks to have mode == 'showing', so be // explicit in resetting the others. textTrack.mode = 'disabled'; } } this.onTextChanged_(); } } /** * Select a specific variant track to play. <code>track</code> should come * from a call to <code>getVariantTracks</code>. If <code>track</code> cannot * be found, this will be a no-op. If the player has not loaded content, this * will be a no-op. * * <p> * Changing variants will take effect once the currently buffered content has * been played. To force the change to happen sooner, use * <code>clearBuffer</code> with <code>safeMargin</code>. Setting * <code>clearBuffer</code> to <code>true</code> will clear all buffered * content after <code>safeMargin</code>, allowing the new variant to start * playing sooner. * * <p> * Note that <code>AdaptationEvents</code> are not fired for manual track * selections. * * @param {shaka.extern.Track} track * @param {boolean=} clearBuffer * @param {number=} safeMargin Optional amount of buffer (in seconds) to * retain when clearing the buffer. Useful for switching variant quickly * without causing a buffering event. Defaults to 0 if not provided. Ignored * if clearBuffer is false. Can cause hiccups on some browsers if chosen too * small, e.g. The amount of two segments is a fair minimum to consider as * safeMargin value. * @export */ selectVariantTrack(track, clearBuffer = false, safeMargin = 0) { if (this.manifest_ && this.streamingEngine_) { if (this.config_.abr.enabled) { shaka.log.alwaysWarn('Changing tracks while abr manager is enabled ' + 'will likely result in the selected track ' + 'being overriden. Consider disabling abr before ' + 'calling selectVariantTrack().'); } const variant = this.manifest_.variants.find( (variant) => variant.id == track.id); if (!variant) { shaka.log.error('No variant with id', track.id); return; } // Double check that the track is allowed to be played. The track list // should only contain playable variants, but if restrictions change and // |selectVariantTrack| is called before the track list is updated, we // could get a now-restricted variant. if (!shaka.util.StreamUtils.isPlayable(variant)) { shaka.log.error('Unable to switch to restricted track', track.id); return; } this.switchVariant_( variant, /* fromAdaptation= */ false, clearBuffer, safeMargin); // Workaround for // https://github.com/shaka-project/shaka-player/issues/1299 // When track is selected, back-propagate the language to // currentAudioLanguage_. this.currentAdaptationSetCriteria_ = new shaka.media.ExampleBasedCriteria( variant, this.config_.mediaSource.codecSwitchingStrategy, this.config_.manifest.dash.enableAudioGroups); // Update AbrManager variants to match these new settings. this.updateAbrManagerVariants_(); } else if (this.video_ && this.video_.audioTracks) { // Safari's native HLS won't let you choose an explicit variant, though // you can choose audio languages this way. const audioTracks = Array.from(this.video_.audioTracks); for (const audioTrack of audioTracks) { if (shaka.util.StreamUtils.html5TrackId(audioTrack) == track.id) { // This will reset the "enabled" of other tracks to false. this.switchHtml5Track_(audioTrack); return; } } } } /** * Return a list of audio language-role combinations available. If the * player has not loaded any content, this will return an empty list. * * @return {!Array.<shaka.extern.LanguageRole>} * @export */ getAudioLanguagesAndRoles() { return shaka.Player.getLanguageAndRolesFrom_(this.getVariantTracks()); } /** * Return a list of text language-role combinations available. If the player * has not loaded any content, this will be return an empty list. * * @return {!Array.<shaka.extern.LanguageRole>} * @export */ getTextLanguagesAndRoles() { return shaka.Player.getLanguageAndRolesFrom_(this.getTextTracks()); } /** * Return a list of audio languages available. If the player has not loaded * any content, this will return an empty list. * * @return {!Array.<string>} * @export */ getAudioLanguages() { return Array.from(shaka.Player.getLanguagesFrom_(this.getVariantTracks())); } /** * Return a list of text languages available. If the player has not loaded * any content, this will return an empty list. * * @return {!Array.<string>} * @export */ getTextLanguages() { return Array.from(shaka.Player.getLanguagesFrom_(this.getTextTracks())); } /** * Sets the current audio language and current variant role to the selected * language, role and channel count, and chooses a new variant if need be. * If the player has not loaded any content, this will be a no-op. * * @param {string} language * @param {string=} role * @param {number=} channelsCount * @param {number=} safeMargin * @param {string=} codec * @export */ selectAudioLanguage(language, role, channelsCount = 0, safeMargin = 0, codec = '') { if (this.manifest_ && this.playhead_) { this.currentAdaptationSetCriteria_ = new shaka.media.PreferenceBasedCriteria( language, role || '', channelsCount, /* hdrLevel= */ '', /* spatialAudio= */ false, /* videoLayout= */ '', /* audioLabel= */ '', /* videoLabel= */ '', this.config_.mediaSource.codecSwitchingStrategy, this.config_.manifest.dash.enableAudioGroups, codec); const diff = (a, b) => { if (!a.video && !b.video) { return 0; } else if (!a.video || !b.video) { return Infinity; } else { return Math.abs((a.video.height || 0) - (b.video.height || 0)) + Math.abs((a.video.width || 0) - (b.video.width || 0)); } }; // Find the variant whose size is closest to the active variant. This // ensures we stay at about the same resolution when just changing the // language/role. const active = this.streamingEngine_.getCurrentVariant(); const set = this.currentAdaptationSetCriteria_.create(this.manifest_.variants); let bestVariant = null; for (const curVariant of set.values()) { if (!shaka.util.StreamUtils.isPlayable(curVariant)) { continue; } if (!bestVariant || diff(bestVariant, active) > diff(curVariant, active)) { bestVariant = curVariant; } } if (bestVariant) { const track = shaka.util.StreamUtils.variantToTrack(bestVariant); this.selectVariantTrack(track, /* clearBuffer= */ true, safeMargin); return; } // If we haven't switched yet, just use ABR to find a new track. this.chooseVariantAndSwitch_(); } else if (this.video_ && this.video_.audioTracks) { const track = shaka.util.StreamUtils.filterStreamsByLanguageAndRole( this.getVariantTracks(), language, role || '', false)[0]; if (track) { this.selectVariantTrack(track); } } } /** * Sets the current text language and current text role to the selected * language and role, and chooses a new variant if need be. If the player has * not loaded any content, this will be a no-op. * * @param {string} language * @param {string=} role * @param {boolean=} forced * @export */ selectTextLanguage(language, role, forced = false) { if (this.manifest_ && this.playhead_) { this.currentTextLanguage_ = language; this.currentTextRole_ = role || ''; this.currentTextForced_ = forced; const chosenText = this.chooseTextStream_(); if (chosenText) { if (chosenText == this.streamingEngine_.getCurrentTextStream()) { shaka.log.debug('Text track already selected.'); return; } this.addTextStreamToSwitchHistory_( chosenText, /* fromAdaptation= */ false); if (this.shouldStreamText_()) { this.streamingEngine_.switchTextStream(chosenText); this.onTextChanged_(); } } } else { const track = shaka.util.StreamUtils.filterStreamsByLanguageAndRole( this.getTextTracks(), language, role || '', forced)[0]; if (track) { this.selectTextTrack(track); } } } /** * Select variant tracks that have a given label. This assumes the * label uniquely identifies an audio stream, so all the variants * are expected to have the same variant.audio. * * @param {string} label * @param {boolean=} clearBuffer Optional clear buffer or not when * switch to new variant * Defaults to true if not provided * @param {number=} safeMargin Optional amount of buffer (in seconds) to * retain when clearing the buffer. * Defaults to 0 if not provided. Ignored if clearBuffer is false. * @export */ selectVariantsByLabel(label, clearBuffer = true, safeMargin = 0) { if (this.manifest_ && this.playhead_) { let firstVariantWithLabel = null; for (const variant of this.manifest_.variants) { if (variant.audio.label == label) { firstVariantWithLabel = variant; break; } } if (firstVariantWithLabel == null) { shaka.log.warning('No variants were found with label: ' + label + '. Ignoring the request to switch.'); return; } // Label is a unique identifier of a variant's audio stream. // Because of that we assume that all the variants with the same // label have the same language. this.currentAdaptationSetCriteria_ = new shaka.media.PreferenceBasedCriteria( firstVariantWithLabel.language, /* role= */ '', /* channelCount= */ 0, /* hdrLevel= */ '', /* spatialAudio= */ false, /* videoLayout= */ '', label, /* videoLabel= */ '', this.config_.mediaSource.codecSwitchingStrategy, this.config_.manifest.dash.enableAudioGroups); this.chooseVariantAndSwitch_(clearBuffer, safeMargin); } else if (this.video_ && this.video_.audioTracks) { const audioTracks = Array.from(this.video_.audioTracks); let trackMatch = null; for (const audioTrack of audioTracks) { if (audioTrack.label == label) { trackMatch = audioTrack; } } if (trackMatch) { this.switchHtml5Track_(trackMatch); } } } /** * Check if the text displayer is enabled. * * @return {boolean} * @export */ isTextTrackVisible() { const expected = this.isTextVisible_; if (this.mediaSourceEngine_ && this.loadMode_ == shaka.Player.LoadMode.MEDIA_SOURCE) { // Make sure our values are still in-sync. const actual = this.mediaSourceEngine_.getTextDisplayer().isTextVisible(); goog.asserts.assert( actual == expected, 'text visibility has fallen out of sync'); // Always return the actual value so that the app has the most accurate // information (in the case that the values come out of sync in prod). return actual; } else if (this.video_ && this.video_.src && this.video_.textTracks) { const textTracks = this.getFilteredTextTracks_(); return textTracks.some((t) => t.mode == 'showing'); } return expected; } /** * Return a list of chapters tracks. * * @return {!Array.<shaka.extern.Track>} * @export */ getChaptersTracks() { if (this.video_ && this.video_.src && this.video_.textTracks) { const textTracks = this.getChaptersTracks_(); const StreamUtils = shaka.util.StreamUtils; return textTracks.map((text) => StreamUtils.html5TextTrackToTrack(text)); } else { return []; } } /** * This returns the list of chapters. * * @param {string} language * @return {!Array.<shaka.extern.Chapter>} * @export */ getChapters(language) { if (!this.video_ || !this.video_.src || !this.video_.textTracks) { return []; } const LanguageUtils = shaka.util.LanguageUtils; const inputlanguage = LanguageUtils.normalize(language); const chaptersTracks = this.getChaptersTracks_(); const chaptersTracksWithLanguage = chaptersTracks .filter((t) => LanguageUtils.normalize(t.language) == inputlanguage); if (!chaptersTracksWithLanguage || !chaptersTracksWithLanguage.length) { return []; } const chapters = []; const uniqueChapters = new Set(); for (const chaptersTrack of chaptersTracksWithLanguage) { if (chaptersTrack && chaptersTrack.cues) { for (const cue of chaptersTrack.cues) { let id = cue.id; if (!id || id == '') { id = cue.startTime + '-' + cue.endTime + '-' + cue.text; } /** @type {shaka.extern.Chapter} */ const chapter = { id: id, title: cue.text, startTime: cue.startTime, endTime: cue.endTime, }; if (!uniqueChapters.has(id)) { chapters.push(chapter); uniqueChapters.add(id); } } } } return chapters; } /** * Ignore the TextTracks with the 'metadata' or 'chapters' kind, or the one * generated by the SimpleTextDisplayer. * * @return {!Array.<TextTrack>} * @private */ getFilteredTextTracks_() { goog.asserts.assert(this.video_.textTracks, 'TextTracks should be valid.'); return Array.from(this.video_.textTracks) .filter((t) => t.kind != 'metadata' && t.kind != 'chapters' && t.label != shaka.Player.TextTrackLabel); } /** * Get the TextTracks with the 'metadata' kind. * * @return {!Array.<TextTrack>} * @private */ getMetadataTracks_() { goog.asserts.assert(this.video_.textTracks, 'TextTracks should be valid.'); return Array.from(this.video_.textTracks) .filter((t) => t.kind == 'metadata'); } /** * Get the TextTracks with the 'chapters' kind. * * @return {!Array.<TextTrack>} * @private */ getChaptersTracks_() { goog.asserts.assert(this.video_.textTracks, 'TextTracks should be valid.'); return Array.from(this.video_.textTracks) .filter((t) => t.kind == 'chapters'); } /** * Enable or disable the text displayer. If the player is in an unloaded * state, the request will be applied next time content is loaded. * * @param {boolean} isVisible * @export */ setTextTrackVisibility(isVisible) { const oldVisibilty = this.isTextVisible_; // Convert to boolean in case apps pass 0/1 instead false/true. const newVisibility = !!isVisible; if (oldVisibilty == newVisibility) { return; } this.isTextVisible_ = newVisibility; // Hold of on setting the text visibility until we have all the components // we need. This ensures that they stay in-sync. if (this.loadMode_ == shaka.Player.LoadMode.MEDIA_SOURCE) { this.mediaSourceEngine_.getTextDisplayer() .setTextVisibility(newVisibility); // When the user wants to see captions, we stream captions. When the user // doesn't want to see captions, we don't stream captions. This is to // avoid bandwidth consumption by an unused resource. The app developer // can override this and configure us to always stream captions. if (!this.config_.streaming.alwaysStreamText) { if (newVisibility) { if (this.streamingEngine_.getCurrentTextStream()) { // We already have a selected text stream. } else { // Find the text stream that best matches the user's preferences. const streams = shaka.util.StreamUtils.filterStreamsByLanguageAndRole( this.manifest_.textStreams, this.currentTextLanguage_, this.currentTextRole_, this.currentTextForced_); // It is possible that there are no streams to play. if (streams.length > 0) { this.streamingEngine_.switchTextStream(streams[0]); this.onTextChanged_(); } } } else { this.streamingEngine_.unloadTextStream(); } } } else if (this.video_ && this.video_.src && this.video_.textTracks) { const textTracks = this.getFilteredTextTracks_(); // Find the active track by looking for one which is not disabled. This // is the only way to identify the track which is currently displayed. // Set it to 'showing' or 'hidden' based on newVisibility. for (const textTrack of textTracks) { if (textTrack.mode != 'disabled') { textTrack.mode = newVisibility ? 'showing' : 'hidden'; } } } // We need to fire the event after we have updated everything so that // everything will be in a stable state when the app responds to the // event. this.onTextTrackVisibility_(); } /** * Get the current playhead position as a date. * * @return {Date} * @export */ getPlayheadTimeAsDate() { let presentationTime = 0; if (this.playhead_) { presentationTime = this.playhead_.getTime(); } else if (this.startTime_ == null) { // A live stream with no requested start time and no playhead yet. We // would start at the live edge, but we don't have that yet, so return // the current date & time. return new Date(); } else { // A specific start time has been requested. This is what Playhead will // use once it is created. presentationTime = this.startTime_; } if (this.manifest_) { const timeline = this.manifest_.presentationTimeline; const startTime = timeline.getInitialProgramDateTime() || timeline.getPresentationStartTime(); return new Date(/* ms= */ (startTime + presentationTime) * 1000); } else if (this.video_ && this.video_.getStartDate) { // Apple's native HLS gives us getStartDate(), which is only available if // EXT-X-PROGRAM-DATETIME is in the playlist. const startDate = this.video_.getStartDate(); if (isNaN(startDate.getTime())) { shaka.log.warning( 'EXT-X-PROGRAM-DATETIME required to get playhead time as Date!'); return null; } return new Date(startDate.getTime() + (presentationTime * 1000)); } else { shaka.log.warning('No way to get playhead time as Date!'); return null; } } /** * Get the presentation start time as a date. * * @return {Date} * @export */ getPresentationStartTimeAsDate() { if (this.manifest_) { const timeline = this.manifest_.presentationTimeline; const startTime = timeline.getInitialProgramDateTime() || timeline.getPresentationStartTime(); goog.asserts.assert(startTime != null, 'Presentation start time should not be null!'); return new Date(/* ms= */ startTime * 1000); } else if (this.video_ && this.video_.getStartDate) { // Apple's native HLS gives us getStartDate(), which is only available if // EXT-X-PROGRAM-DATETIME is in the playlist. const startDate = this.video_.getStartDate(); if (isNaN(startDate.getTime())) { shaka.log.warning( 'EXT-X-PROGRAM-DATETIME required to get presentation start time ' + 'as Date!'); return null; } return startDate; } else { shaka.log.warning('No way to get presentation start time as Date!'); return null; } } /** * Get the presentation segment availability duration. This should only be * called when the player has loaded a live stream. If the player has not * loaded a live stream, this will return <code>null</code>. * * @return {?number} * @export */ getSegmentAvailabilityDuration() { if (!this.isLive()) { shaka.log.warning('getSegmentAvailabilityDuration is for live streams!'); return null; } if (this.manifest_) { const timeline = this.manifest_.presentationTimeline; return timeline.getSegmentAvailabilityDuration(); } else { shaka.log.warning('No way to get segment segment availability duration!'); return null; } } /** * Get information about what the player has buffered. If the player has not * loaded content or is currently loading content, the buffered content will * be empty. * * @return {shaka.extern.BufferedInfo} * @export */ getBufferedInfo() { if (this.loadMode_ == shaka.Player.LoadMode.MEDIA_SOURCE) { return this.mediaSourceEngine_.getBufferedInfo(); } const info = { total: [], audio: [], video: [], text: [], }; if (this.loadMode_ == shaka.Player.LoadMode.SRC_EQUALS) { const TimeRangesUtils = shaka.media.TimeRangesUtils; info.total = TimeRangesUtils.getBufferedInfo(this.video_.buffered); } return info; } /** * Get statistics for the current playback session. If the player is not * playing content, this will return an empty stats object. * * @return {shaka.extern.Stats} * @export */ getStats() { // If the Player is not in a fully-loaded state, then return an empty stats // blob so that this call will never fail. const loaded = this.loadMode_ == shaka.Player.LoadMode.MEDIA_SOURCE || this.loadMode_ == shaka.Player.LoadMode.SRC_EQUALS; if (!loaded) { return shaka.util.Stats.getEmptyBlob(); } this.updateStateHistory_(); goog.asserts.assert(this.video_, 'If we have stats, we should have video_'); const element = /** @type {!HTMLVideoElement} */ (this.video_); const completionRatio = element.currentTime / element.duration; if (!isNaN(completionRatio)) { this.stats_.setCompletionPercent(Math.round(100 * completionRatio)); } if (this.playhead_) { this.stats_.setGapsJumped(this.playhead_.getGapsJumped()); this.stats_.setStallsDetected(this.playhead_.getStallsDetected()); } if (element.getVideoPlaybackQuality) { const info = element.getVideoPlaybackQuality(); this.stats_.setDroppedFrames( Number(info.droppedVideoFrames), Number(info.totalVideoFrames)); this.stats_.setCorruptedFrames(Number(info.corruptedVideoFrames)); } const licenseSeconds = this.drmEngine_ ? this.drmEngine_.getLicenseTime() : NaN; this.stats_.setLicenseTime(licenseSeconds); if (this.loadMode_ == shaka.Player.LoadMode.MEDIA_SOURCE) { // Event through we are loaded, it is still possible that we don't have a // variant yet because we set the load mode before we select the first // variant to stream. const variant = this.streamingEngine_.getCurrentVariant(); const textStream = this.streamingEngine_.getCurrentTextStream(); if (variant) { const rate = this.playRateController_ ? this.playRateController_.getRealRate() : 1; const variantBandwidth = rate * variant.bandwidth; let currentStreamBandwidth = variantBandwidth; if (textStream && textStream.bandwidth) { currentStreamBandwidth += (rate * textStream.bandwidth); } this.stats_.setCurrentStreamBandwidth(currentStreamBandwidth); } if (variant && variant.video) { this.stats_.setResolution( /* width= */ variant.video.width || NaN, /* height= */ variant.video.height || NaN); } if (this.isLive()) { const now = this.getPresentationStartTimeAsDate().valueOf() + element.currentTime * 1000; const latency = (Date.now() - now) / 1000; this.stats_.setLiveLatency(latency); } if (this.manifest_) { this.stats_.setManifestPeriodCount(this.manifest_.periodCount); this.stats_.setManifestGapCount(this.manifest_.gapCount); if (this.manifest_.presentationTimeline) { const maxSegmentDuration = this.manifest_.presentationTimeline.getMaxSegmentDuration(); this.stats_.setMaxSegmentDuration(maxSegmentDuration); } } const estimate = this.abrManager_.getBandwidthEstimate(); this.stats_.setBandwidthEstimate(estimate); } if (this.loadMode_ == shaka.Player.LoadMode.SRC_EQUALS) { this.stats_.setResolution( /* width= */ element.videoWidth || NaN, /* height= */ element.videoHeight || NaN); } return this.stats_.getBlob(); } /** * Adds the given text track to the loaded manifest. <code>load()</code> must * resolve before calling. The presentation must have a duration. * * This returns the created track, which can immediately be selected by the * application. The track will not be automatically selected. * * @param {string} uri * @param {string} language * @param {string} kind * @param {string=} mimeType * @param {string=} codec * @param {string=} label * @param {boolean=} forced * @return {!Promise.<shaka.extern.Track>} * @export */ async addTextTrackAsync(uri, language, kind, mimeType, codec, label, forced = false) { if (this.loadMode_ != shaka.Player.LoadMode.MEDIA_SOURCE && this.loadMode_ != shaka.Player.LoadMode.SRC_EQUALS) { shaka.log.error( 'Must call load() and wait for it to resolve before adding text ' + 'tracks.'); throw new shaka.util.Error( shaka.util.Error.Severity.RECOVERABLE, shaka.util.Error.Category.PLAYER, shaka.util.Error.Code.CONTENT_NOT_LOADED); } if (kind != 'subtitles' && kind != 'captions') { shaka.log.alwaysWarn( 'Using a kind value different of `subtitles` or `captions` can ' + 'cause unwanted issues.'); } if (!mimeType) { mimeType = await this.getTextMimetype_(uri); } let adCuePoints = []; if (this.adManager_) { adCuePoints = this.adManager_.getCuePoints(); } if (this.loadMode_ == shaka.Player.LoadMode.SRC_EQUALS) { if (forced) { // See: https://github.com/whatwg/html/issues/4472 kind = 'forced'; } await this.addSrcTrackElement_(uri, language, kind, mimeType, label || '', adCuePoints); const LanguageUtils = shaka.util.LanguageUtils; const languageNormalized = LanguageUtils.normalize(language); const textTracks = this.getTextTracks(); const srcTrack = textTracks.find((t) => { return LanguageUtils.normalize(t.language) == languageNormalized && t.label == (label || '') && t.kind == kind; }); if (srcTrack) { this.onTracksChanged_(); return srcTrack; } // This should not happen, but there are browser implementations that may // not support the Track element. shaka.log.error('Cannot add this text when loaded with src='); throw new shaka.util.Error( shaka.util.Error.Severity.RECOVERABLE, shaka.util.Error.Category.TEXT, shaka.util.Error.Code.CANNOT_ADD_EXTERNAL_TEXT_TO_SRC_EQUALS); } const ContentType = shaka.util.ManifestParserUtils.ContentType; let duration = this.video_.duration; if (this.manifest_) { duration = this.manifest_.presentationTimeline.getDuration(); } if (duration == Infinity) { throw new shaka.util.Error( shaka.util.Error.Severity.RECOVERABLE, shaka.util.Error.Category.MANIFEST, shaka.util.Error.Code.CANNOT_ADD_EXTERNAL_TEXT_TO_LIVE_STREAM); } if (adCuePoints.length) { goog.asserts.assert( this.networkingEngine_, 'Need networking engine.'); const data = await this.getTextData_(uri, this.networkingEngine_, this.config_.streaming.retryParameters); const vvtText = this.convertToWebVTT_(data, mimeType, adCuePoints); const blob = new Blob([vvtText], {type: 'text/vtt'}); uri = shaka.media.MediaSourceEngine.createObjectURL(blob); mimeType = 'text/vtt'; } /** @type {shaka.extern.Stream} */ const stream = { id: this.nextExternalStreamId_++, originalId: null, groupId: null, createSegmentIndex: () => Promise.resolve(), segmentIndex: shaka.media.SegmentIndex.forSingleSegment( /* startTime= */ 0, /* duration= */ duration, /* uris= */ [uri]), mimeType: mimeType || '', codecs: codec || '', kind: kind, encrypted: false, drmInfos: [], keyIds: new Set(), language: language, originalLanguage: language, label: label || null, type: ContentType.TEXT, primary: false, trickModeVideo: null, emsgSchemeIdUris: null, roles: [], forced: !!forced, channelsCount: null, audioSamplingRate: null, spatialAudio: false, closedCaptions: null, accessibilityPurpose: null, external: true, fastSwitching: false, fullMimeTypes: new Set([shaka.util.MimeUtils.getFullType( mimeType || '', codec || '')]), }; const fullMimeType = shaka.util.MimeUtils.getFullType( stream.mimeType, stream.codecs); const supported = shaka.text.TextEngine.isTypeSupported(fullMimeType); if (!supported) { throw new shaka.util.Error( shaka.util.Error.Severity.CRITICAL, shaka.util.Error.Category.TEXT, shaka.util.Error.Code.MISSING_TEXT_PLUGIN, mimeType); } this.manifest_.textStreams.push(stream); this.onTracksChanged_(); return shaka.util.StreamUtils.textStreamToTrack(stream); } /** * Adds the given thumbnails track to the loaded manifest. * <code>load()</code> must resolve before calling. The presentation must * have a duration. * * This returns the created track, which can immediately be used by the * application. * * @param {string} uri * @param {string=} mimeType * @return {!Promise.<shaka.extern.Track>} * @export */ async addThumbnailsTrack(uri, mimeType) { if (this.loadMode_ != shaka.Player.LoadMode.MEDIA_SOURCE && this.loadMode_ != shaka.Player.LoadMode.SRC_EQUALS) { shaka.log.error( 'Must call load() and wait for it to resolve before adding image ' + 'tracks.'); throw new shaka.util.Error( shaka.util.Error.Severity.RECOVERABLE, shaka.util.Error.Category.PLAYER, shaka.util.Error.Code.CONTENT_NOT_LOADED); } if (!mimeType) { mimeType = await this.getTextMimetype_(uri); } if (mimeType != 'text/vtt') { throw new shaka.util.Error( shaka.util.Error.Severity.RECOVERABLE, shaka.util.Error.Category.TEXT, shaka.util.Error.Code.UNSUPPORTED_EXTERNAL_THUMBNAILS_URI, uri); } const ContentType = shaka.util.ManifestParserUtils.ContentType; let duration = this.video_.duration; if (this.manifest_) { duration = this.manifest_.presentationTimeline.getDuration(); } if (duration == Infinity) { throw new shaka.util.Error( shaka.util.Error.Severity.RECOVERABLE, shaka.util.Error.Category.MANIFEST, shaka.util.Error.Code.CANNOT_ADD_EXTERNAL_THUMBNAILS_TO_LIVE_STREAM); } goog.asserts.assert( this.networkingEngine_, 'Need networking engine.'); const buffer = await this.getTextData_(uri, this.networkingEngine_, this.config_.streaming.retryParameters); const factory = shaka.text.TextEngine.findParser(mimeType); if (!factory) { throw new shaka.util.Error( shaka.util.Error.Severity.CRITICAL, shaka.util.Error.Category.TEXT, shaka.util.Error.Code.MISSING_TEXT_PLUGIN, mimeType); } const TextParser = factory(); const time = { periodStart: 0, segmentStart: 0, segmentEnd: duration, vttOffset: 0, }; const data = shaka.util.BufferUtils.toUint8(buffer); const cues = TextParser.parseMedia(data, time, uri); const references = []; for (const cue of cues) { let uris = null; const getUris = () => { if (uris == null) { uris = shaka.util.ManifestParserUtils.resolveUris( [uri], [cue.payload]); } return uris || []; }; const reference = new shaka.media.SegmentReference( cue.startTime, cue.endTime, getUris, /* startByte= */ 0, /* endByte= */ null, /* initSegmentReference= */ null, /* timestampOffset= */ 0, /* appendWindowStart= */ 0, /* appendWindowEnd= */ Infinity, ); if (cue.payload.includes('#xywh')) { const spriteInfo = cue.payload.split('#xywh=')[1].split(','); if (spriteInfo.length === 4) { reference.setThumbnailSprite({ height: parseInt(spriteInfo[3], 10), positionX: parseInt(spriteInfo[0], 10), positionY: parseInt(spriteInfo[1], 10), width: parseInt(spriteInfo[2], 10), }); } } references.push(reference); } /** @type {shaka.extern.Stream} */ const stream = { id: this.nextExternalStreamId_++, originalId: null, groupId: null, createSegmentIndex: () => Promise.resolve(), segmentIndex: new shaka.media.SegmentIndex(references), mimeType: mimeType || '', codecs: '', kind: '', encrypted: false, drmInfos: [], keyIds: new Set(), language: 'und', originalLanguage: null, label: null, type: ContentType.IMAGE, primary: false, trickModeVideo: null, emsgSchemeIdUris: null, roles: [], forced: false, channelsCount: null, audioSamplingRate: null, spatialAudio: false, closedCaptions: null, tilesLayout: '1x1', accessibilityPurpose: null, external: true, fastSwitching: false, fullMimeTypes: new Set([shaka.util.MimeUtils.getFullType( mimeType || '', '')]), }; if (this.loadMode_ == shaka.Player.LoadMode.SRC_EQUALS) { this.externalSrcEqualsThumbnailsStreams_.push(stream); } else { this.manifest_.imageStreams.push(stream); } this.onTracksChanged_(); return shaka.util.StreamUtils.imageStreamToTrack(stream); } /** * Adds the given chapters track to the loaded manifest. <code>load()</code> * must resolve before calling. The presentation must have a duration. * * This returns the created track. * * @param {string} uri * @param {string} language * @param {string=} mimeType * @return {!Promise.<shaka.extern.Track>} * @export */ async addChaptersTrack(uri, language, mimeType) { if (this.loadMode_ != shaka.Player.LoadMode.MEDIA_SOURCE && this.loadMode_ != shaka.Player.LoadMode.SRC_EQUALS) { shaka.log.error( 'Must call load() and wait for it to resolve before adding ' + 'chapters tracks.'); throw new shaka.util.Error( shaka.util.Error.Severity.RECOVERABLE, shaka.util.Error.Category.PLAYER, shaka.util.Error.Code.CONTENT_NOT_LOADED); } if (!mimeType) { mimeType = await this.getTextMimetype_(uri); } let adCuePoints = []; if (this.adManager_) { adCuePoints = this.adManager_.getCuePoints(); } /** @type {!HTMLTrackElement} */ const trackElement = await this.addSrcTrackElement_( uri, language, /* kind= */ 'chapters', mimeType, /* label= */ '', adCuePoints); const chaptersTracks = this.getChaptersTracks(); const chaptersTrack = chaptersTracks.find((t) => { return t.language == language; }); if (chaptersTrack) { await new Promise((resolve, reject) => { // The chapter data isn't available until the 'load' event fires, and // that won't happen until the chapters track is activated by the // activateChaptersTrack_ method. this.loadEventManager_.listenOnce(trackElement, 'load', resolve); this.loadEventManager_.listenOnce(trackElement, 'error', (event) => { reject(new shaka.util.Error( shaka.util.Error.Severity.RECOVERABLE, shaka.util.Error.Category.TEXT, shaka.util.Error.Code.CHAPTERS_TRACK_FAILED)); }); }); this.onTracksChanged_(); return chaptersTrack; } // This should not happen, but there are browser implementations that may // not support the Track element. shaka.log.error('Cannot add this text when loaded with src='); throw new shaka.util.Error( shaka.util.Error.Severity.RECOVERABLE, shaka.util.Error.Category.TEXT, shaka.util.Error.Code.CANNOT_ADD_EXTERNAL_TEXT_TO_SRC_EQUALS); } /** * @param {string} uri * @return {!Promise.<string>} * @private */ async getTextMimetype_(uri) { let mimeType; try { goog.asserts.assert( this.networkingEngine_, 'Need networking engine.'); // eslint-disable-next-line require-atomic-updates mimeType = await shaka.net.NetworkingUtils.getMimeType(uri, this.networkingEngine_, this.config_.streaming.retryParameters); } catch (error) {} if (mimeType) { return mimeType; } shaka.log.error( 'The mimeType has not been provided and it could not be deduced ' + 'from its uri.'); throw new shaka.util.Error( shaka.util.Error.Severity.RECOVERABLE, shaka.util.Error.Category.TEXT, shaka.util.Error.Code.TEXT_COULD_NOT_GUESS_MIME_TYPE, uri); } /** * @param {string} uri * @param {string} language * @param {string} kind * @param {string} mimeType * @param {string} label * @param {!Array.<!shaka.extern.AdCuePoint>} adCuePoints * @return {!Promise.<!HTMLTrackElement>} * @private */ async addSrcTrackElement_(uri, language, kind, mimeType, label, adCuePoints) { if (mimeType != 'text/vtt' || adCuePoints.length) { goog.asserts.assert( this.networkingEngine_, 'Need networking engine.'); const data = await this.getTextData_(uri, this.networkingEngine_, this.config_.streaming.retryParameters); const vvtText = this.convertToWebVTT_(data, mimeType, adCuePoints); const blob = new Blob([vvtText], {type: 'text/vtt'}); uri = shaka.media.MediaSourceEngine.createObjectURL(blob); mimeType = 'text/vtt'; } const trackElement = /** @type {!HTMLTrackElement} */(document.createElement('track')); trackElement.src = this.cmcdManager_.appendTextTrackData(uri); trackElement.label = label; trackElement.kind = kind; trackElement.srclang = language; // Because we're pulling in the text track file via Javascript, the // same-origin policy applies. If you'd like to have a player served // from one domain, but the text track served from another, you'll // need to enable CORS in order to do so. In addition to enabling CORS // on the server serving the text tracks, you will need to add the // crossorigin attribute to the video element itself. if (!this.video_.getAttribute('crossorigin')) { this.video_.setAttribute('crossorigin', 'anonymous'); } this.video_.appendChild(trackElement); return trackElement; } /** * @param {string} uri * @param {!shaka.net.NetworkingEngine} netEngine * @param {shaka.extern.RetryParameters} retryParams * @return {!Promise.<BufferSource>} * @private */ async getTextData_(uri, netEngine, retryParams) { const type = shaka.net.NetworkingEngine.RequestType.SEGMENT; const request = shaka.net.NetworkingEngine.makeRequest([uri], retryParams); request.method = 'GET'; this.cmcdManager_.applyTextData(request); const response = await netEngine.request(type, request).promise; return response.data; } /** * Converts an input string to a WebVTT format string. * * @param {BufferSource} buffer * @param {string} mimeType * @param {!Array.<!shaka.extern.AdCuePoint>} adCuePoints * @return {string} * @private */ convertToWebVTT_(buffer, mimeType, adCuePoints) { const factory = shaka.text.TextEngine.findParser(mimeType); if (factory) { const obj = factory(); const time = { periodStart: 0, segmentStart: 0, segmentEnd: this.video_.duration, vttOffset: 0, }; const data = shaka.util.BufferUtils.toUint8(buffer); const cues = obj.parseMedia(data, time, /* uri= */ null); return shaka.text.WebVttGenerator.convert(cues, adCuePoints); } throw new shaka.util.Error( shaka.util.Error.Severity.CRITICAL, shaka.util.Error.Category.TEXT, shaka.util.Error.Code.MISSING_TEXT_PLUGIN, mimeType); } /** * Set the maximum resolution that the platform's hardware can handle. * * @param {number} width * @param {number} height * @export */ setMaxHardwareResolution(width, height) { this.maxHwRes_.width = width; this.maxHwRes_.height = height; } /** * Retry streaming after a streaming failure has occurred. When the player has * not loaded content or is loading content, this will be a no-op and will * return <code>false</code>. * * <p> * If the player has loaded content, and streaming has not seen an error, this * will return <code>false</code>. * * <p> * If the player has loaded content, and streaming seen an error, but the * could not resume streaming, this will return <code>false</code>. * * @param {number=} retryDelaySeconds * @return {boolean} * @export */ retryStreaming(retryDelaySeconds = 0.1) { return this.loadMode_ == shaka.Player.LoadMode.MEDIA_SOURCE ? this.streamingEngine_.retry(retryDelaySeconds) : false; } /** * Get the manifest that the player has loaded. If the player has not loaded * any content, this will return <code>null</code>. * * NOTE: This structure is NOT covered by semantic versioning compatibility * guarantees. It may change at any time! * * This is marked as deprecated to warn Closure Compiler users at compile-time * to avoid using this method. * * @return {?shaka.extern.Manifest} * @export * @deprecated */ getManifest() { shaka.log.alwaysWarn( 'Shaka Player\'s internal Manifest structure is NOT covered by ' + 'semantic versioning compatibility guarantees. It may change at any ' + 'time! Please consider filing a feature request for whatever you ' + 'use getManifest() for.'); return this.manifest_; } /** * Get the type of manifest parser that the player is using. If the player has * not loaded any content, this will return <code>null</code>. * * @return {?shaka.extern.ManifestParser.Factory} * @export */ getManifestParserFactory() { return this.parserFactory_; } /** * @param {shaka.extern.Variant} variant * @param {boolean} fromAdaptation * @private */ addVariantToSwitchHistory_(variant, fromAdaptation) { const switchHistory = this.stats_.getSwitchHistory(); switchHistory.updateCurrentVariant(variant, fromAdaptation); } /** * @param {shaka.extern.Stream} textStream * @param {boolean} fromAdaptation * @private */ addTextStreamToSwitchHistory_(textStream, fromAdaptation) { const switchHistory = this.stats_.getSwitchHistory(); switchHistory.updateCurrentText(textStream, fromAdaptation); } /** * @return {shaka.extern.PlayerConfiguration} * @private */ defaultConfig_() { const config = shaka.util.PlayerConfiguration.createDefault(); config.streaming.failureCallback = (error) => { this.defaultStreamingFailureCallback_(error); }; // Because this.video_ may not be set when the config is built, the default // TextDisplay factory must capture a reference to "this". config.textDisplayFactory = () => { if (this.videoContainer_) { const latestConfig = this.getConfiguration(); return new shaka.text.UITextDisplayer( this.video_, this.videoContainer_, latestConfig.textDisplayer); } else { // eslint-disable-next-line no-restricted-syntax if (HTMLMediaElement.prototype.addTextTrack) { return new shaka.text.SimpleTextDisplayer( this.video_, shaka.Player.TextTrackLabel); } else { shaka.log.warning('Text tracks are not supported by the ' + 'browser, disabling.'); return new shaka.text.StubTextDisplayer(); } } }; return config; } /** * Set the videoContainer to construct UITextDisplayer. * @param {HTMLElement} videoContainer * @export */ setVideoContainer(videoContainer) { this.videoContainer_ = videoContainer; } /** * @param {!shaka.util.Error} error * @private */ defaultStreamingFailureCallback_(error) { // For live streams, we retry streaming automatically for certain errors. // For VOD streams, all streaming failures are fatal. if (!this.isLive()) { return; } let retryDelaySeconds = null; if (error.code == shaka.util.Error.Code.BAD_HTTP_STATUS || error.code == shaka.util.Error.Code.HTTP_ERROR) { // These errors can be near-instant, so delay a bit before retrying. retryDelaySeconds = 1; if (this.config_.streaming.lowLatencyMode) { retryDelaySeconds = 0.1; } } else if (error.code == shaka.util.Error.Code.TIMEOUT) { // We already waited for a timeout, so retry quickly. retryDelaySeconds = 0.1; } if (retryDelaySeconds != null) { error.severity = shaka.util.Error.Severity.RECOVERABLE; shaka.log.warning('Live streaming error. Retrying automatically...'); this.retryStreaming(retryDelaySeconds); } } /** * For CEA closed captions embedded in the video streams, create dummy text * stream. This can be safely called again on existing manifests, for * manifest updates. * @param {!shaka.extern.Manifest} manifest * @private */ makeTextStreamsForClosedCaptions_(manifest) { const ContentType = shaka.util.ManifestParserUtils.ContentType; const TextStreamKind = shaka.util.ManifestParserUtils.TextStreamKind; const CEA608_MIME = shaka.util.MimeUtils.CEA608_CLOSED_CAPTION_MIMETYPE; const CEA708_MIME = shaka.util.MimeUtils.CEA708_CLOSED_CAPTION_MIMETYPE; // A set, to make sure we don't create two text streams for the same video. const closedCaptionsSet = new Set(); for (const textStream of manifest.textStreams) { if (textStream.mimeType == CEA608_MIME || textStream.mimeType == CEA708_MIME) { // This function might be called on a manifest update, so don't make a // new text stream for closed caption streams we have seen before. closedCaptionsSet.add(textStream.originalId); } } for (const variant of manifest.variants) { const video = variant.video; if (video && video.closedCaptions) { for (const id of video.closedCaptions.keys()) { if (!closedCaptionsSet.has(id)) { const mimeType = id.startsWith('CC') ? CEA608_MIME : CEA708_MIME; // Add an empty segmentIndex, for the benefit of the period combiner // in our builtin DASH parser. const segmentIndex = new shaka.media.MetaSegmentIndex(); const language = video.closedCaptions.get(id); const textStream = { id: this.nextExternalStreamId_++, // A globally unique ID. originalId: id, // The CC ID string, like 'CC1', 'CC3', etc. groupId: null, createSegmentIndex: () => Promise.resolve(), segmentIndex, mimeType, codecs: '', kind: TextStreamKind.CLOSED_CAPTION, encrypted: false, drmInfos: [], keyIds: new Set(), language, originalLanguage: language, label: null, type: ContentType.TEXT, primary: false, trickModeVideo: null, emsgSchemeIdUris: null, roles: video.roles, forced: false, channelsCount: null, audioSamplingRate: null, spatialAudio: false, closedCaptions: null, accessibilityPurpose: null, external: false, fastSwitching: false, fullMimeTypes: new Set([shaka.util.MimeUtils.getFullType( mimeType, '')]), }; manifest.textStreams.push(textStream); closedCaptionsSet.add(id); } } } } } /** * @param {shaka.extern.Variant} initialVariant * @param {number} time * @return {!Promise.<number>} * @private */ async adjustStartTime_(initialVariant, time) { /** @type {?shaka.extern.Stream} */ const activeAudio = initialVariant.audio; /** @type {?shaka.extern.Stream} */ const activeVideo = initialVariant.video; /** * @param {?shaka.extern.Stream} stream * @param {number} time * @return {!Promise.<?number>} */ const getAdjustedTime = async (stream, time) => { if (!stream) { return null; } await stream.createSegmentIndex(); const iter = stream.segmentIndex.getIteratorForTime(time); const ref = iter ? iter.next().value : null; if (!ref) { return null; } const refTime = ref.startTime; goog.asserts.assert(refTime <= time, 'Segment should start before target time!'); return refTime; }; const audioStartTime = await getAdjustedTime(activeAudio, time); const videoStartTime = await getAdjustedTime(activeVideo, time); // If we have both video and audio times, pick the larger one. If we picked // the smaller one, that one will download an entire segment to buffer the // difference. if (videoStartTime != null && audioStartTime != null) { return Math.max(videoStartTime, audioStartTime); } else if (videoStartTime != null) { return videoStartTime; } else if (audioStartTime != null) { return audioStartTime; } else { return time; } } /** * Update the buffering state to be either "we are buffering" or "we are not * buffering", firing events to the app as needed. * * @private */ updateBufferState_() { const isBuffering = this.isBuffering(); shaka.log.v2('Player changing buffering state to', isBuffering); // Make sure we have all the components we need before we consider ourselves // as being loaded. // TODO: Make the check for "loaded" simpler. const loaded = this.stats_ && this.bufferObserver_ && this.playhead_; if (loaded) { this.playRateController_.setBuffering(isBuffering); if (this.cmcdManager_) { this.cmcdManager_.setBuffering(isBuffering); } this.updateStateHistory_(); const dynamicTargetLatency = this.config_.streaming.liveSync.dynamicTargetLatency.enabled; const maxAttempts = this.config_.streaming.liveSync.dynamicTargetLatency.maxAttempts; if (dynamicTargetLatency && isBuffering && this.rebufferingCount_ < maxAttempts) { const maxLatency = this.config_.streaming.liveSync.dynamicTargetLatency.maxLatency; const targetLatencyTolerance = this.config_.streaming.liveSync.targetLatencyTolerance; const rebufferIncrement = this.config_.streaming.liveSync.dynamicTargetLatency .rebufferIncrement; if (this.currentTargetLatency_) { this.currentTargetLatency_ = Math.min( this.currentTargetLatency_ + ++this.rebufferingCount_ * rebufferIncrement, maxLatency - targetLatencyTolerance); } } } // Surface the buffering event so that the app knows if/when we are // buffering. const eventName = shaka.util.FakeEvent.EventName.Buffering; const data = (new Map()).set('buffering', isBuffering); this.dispatchEvent(shaka.Player.makeEvent_(eventName, data)); } /** * A callback for when the playback rate changes. We need to watch the * playback rate so that if the playback rate on the media element changes * (that was not caused by our play rate controller) we can notify the * controller so that it can stay in-sync with the change. * * @private */ onRateChange_() { /** @type {number} */ const newRate = this.video_.playbackRate; // On Edge, when someone seeks using the native controls, it will set the // playback rate to zero until they finish seeking, after which it will // return the playback rate. // // If the playback rate changes while seeking, Edge will cache the playback // rate and use it after seeking. // // https://github.com/shaka-project/shaka-player/issues/951 if (newRate == 0) { return; } if (this.playRateController_) { // The playback rate has changed. This could be us or someone else. // If this was us, setting the rate again will be a no-op. this.playRateController_.set(newRate); } const event = shaka.Player.makeEvent_( shaka.util.FakeEvent.EventName.RateChange); this.dispatchEvent(event); } /** * Try updating the state history. If the player has not finished * initializing, this will be a no-op. * * @private */ updateStateHistory_() { // If we have not finish initializing, this will be a no-op. if (!this.stats_) { return; } if (!this.bufferObserver_) { return; } const State = shaka.media.BufferingObserver.State; const history = this.stats_.getStateHistory(); let updateState = 'playing'; if (this.bufferObserver_.getState() == State.STARVING) { updateState = 'buffering'; } else if (this.video_.paused) { updateState = 'paused'; } else if (this.video_.ended) { updateState = 'ended'; } const stateChanged = history.update(updateState); if (stateChanged) { const eventName = shaka.util.FakeEvent.EventName.StateChanged; const data = (new Map()).set('newstate', updateState); this.dispatchEvent(shaka.Player.makeEvent_(eventName, data)); } } /** * Callback for liveSync and vodDynamicPlaybackRate * * @private */ onTimeUpdate_() { const playbackRate = this.video_.playbackRate; const isLive = this.isLive(); if (this.config_.streaming.vodDynamicPlaybackRate && !isLive) { const minPlaybackRate = this.config_.streaming.vodDynamicPlaybackRateLowBufferRate; const bufferFullness = this.getBufferFullness(); const bufferThreshold = this.config_.streaming.vodDynamicPlaybackRateBufferRatio; if (bufferFullness <= bufferThreshold) { if (playbackRate != minPlaybackRate) { shaka.log.debug('Buffer fullness ratio (' + bufferFullness + ') ' + 'is less than the vodDynamicPlaybackRateBufferRatio (' + bufferThreshold + '). Updating playbackRate to ' + minPlaybackRate); this.trickPlay(minPlaybackRate); } } else if (bufferFullness == 1) { if (playbackRate !== this.playRateController_.getDefaultRate()) { shaka.log.debug('Buffer is full. Cancel trick play.'); this.cancelTrickPlay(); } } } // If the live stream has reached its end, do not sync. if (!isLive) { return; } const seekRange = this.seekRange(); if (!Number.isFinite(seekRange.end)) { return; } const currentTime = this.video_.currentTime; if (currentTime < seekRange.start) { // Bad stream? return; } let targetLatency; let maxLatency; let maxPlaybackRate; let minLatency; let minPlaybackRate; const targetLatencyTolerance = this.config_.streaming.liveSync.targetLatencyTolerance; const dynamicTargetLatency = this.config_.streaming.liveSync.dynamicTargetLatency.enabled; const stabilityThreshold = this.config_.streaming.liveSync.dynamicTargetLatency.stabilityThreshold; if (this.config_.streaming.liveSync && this.config_.streaming.liveSync.enabled) { targetLatency = this.config_.streaming.liveSync.targetLatency; maxLatency = targetLatency + targetLatencyTolerance; minLatency = Math.max(0, targetLatency - targetLatencyTolerance); maxPlaybackRate = this.config_.streaming.liveSync.maxPlaybackRate; minPlaybackRate = this.config_.streaming.liveSync.minPlaybackRate; } else { // serviceDescription must override if it is defined in the MPD and // liveSync configuration is not set. if (this.manifest_ && this.manifest_.serviceDescription) { targetLatency = this.manifest_.serviceDescription.targetLatency; if (this.manifest_.serviceDescription.targetLatency != null) { maxLatency = this.manifest_.serviceDescription.targetLatency + targetLatencyTolerance; } else if (this.manifest_.serviceDescription.maxLatency != null) { maxLatency = this.manifest_.serviceDescription.maxLatency; } if (this.manifest_.serviceDescription.targetLatency != null) { minLatency = Math.max(0, this.manifest_.serviceDescription.targetLatency - targetLatencyTolerance); } else if (this.manifest_.serviceDescription.minLatency != null) { minLatency = this.manifest_.serviceDescription.minLatency; } maxPlaybackRate = this.manifest_.serviceDescription.maxPlaybackRate || this.config_.streaming.liveSync.maxPlaybackRate; minPlaybackRate = this.manifest_.serviceDescription.minPlaybackRate || this.config_.streaming.liveSync.minPlaybackRate; } } if (!this.currentTargetLatency_ && typeof targetLatency === 'number') { this.currentTargetLatency_ = targetLatency; } const maxAttempts = this.config_.streaming.liveSync.dynamicTargetLatency.maxAttempts; if (dynamicTargetLatency && this.targetLatencyReached_ && this.currentTargetLatency_ !== null && typeof targetLatency === 'number' && this.rebufferingCount_ < maxAttempts && (Date.now() - this.targetLatencyReached_) > stabilityThreshold * 1000) { const dynamicMinLatency = this.config_.streaming.liveSync.dynamicTargetLatency.minLatency; const latencyIncrement = (targetLatency - dynamicMinLatency) / 2; this.currentTargetLatency_ = Math.max( this.currentTargetLatency_ - latencyIncrement, // current target latency should be within the tolerance of the min // latency to not overshoot it dynamicMinLatency + targetLatencyTolerance); this.targetLatencyReached_ = Date.now(); } if (dynamicTargetLatency && this.currentTargetLatency_ !== null) { maxLatency = this.currentTargetLatency_ + targetLatencyTolerance; minLatency = this.currentTargetLatency_ - targetLatencyTolerance; } const latency = seekRange.end - this.video_.currentTime; let offset = 0; // In src= mode, the seek range isn't updated frequently enough, so we need // to fudge the latency number with an offset. The playback rate is used // as an offset, since that is the amount we catch up 1 second of // accelerated playback. if (this.loadMode_ == shaka.Player.LoadMode.SRC_EQUALS) { const buffered = this.video_.buffered; if (buffered.length > 0) { const bufferedEnd = buffered.end(buffered.length - 1); offset = Math.max(maxPlaybackRate, bufferedEnd - seekRange.end); } } const panicMode = this.config_.streaming.liveSync.panicMode; const panicThreshold = this.config_.streaming.liveSync.panicThreshold * 1000; const timeSinceLastRebuffer = Date.now() - this.bufferObserver_.getLastRebufferTime(); if (panicMode && !minPlaybackRate) { minPlaybackRate = this.config_.streaming.liveSync.minPlaybackRate; } if (panicMode && minPlaybackRate && timeSinceLastRebuffer <= panicThreshold) { if (playbackRate != minPlaybackRate) { shaka.log.debug('Time since last rebuffer (' + timeSinceLastRebuffer + 's) ' + 'is less than the live sync panicThreshold (' + panicThreshold + 's). Updating playbackRate to ' + minPlaybackRate); this.trickPlay(minPlaybackRate); } } else if (maxLatency && maxPlaybackRate && (latency - offset) > maxLatency) { if (playbackRate != maxPlaybackRate) { shaka.log.debug('Latency (' + latency + 's) is greater than ' + 'live sync maxLatency (' + maxLatency + 's). ' + 'Updating playbackRate to ' + maxPlaybackRate); this.trickPlay(maxPlaybackRate); } this.targetLatencyReached_ = null; } else if (minLatency && minPlaybackRate && (latency - offset) < minLatency) { if (playbackRate != minPlaybackRate) { shaka.log.debug('Latency (' + latency + 's) is smaller than ' + 'live sync minLatency (' + minLatency + 's). ' + 'Updating playbackRate to ' + minPlaybackRate); this.trickPlay(minPlaybackRate); } this.targetLatencyReached_ = null; } else if (playbackRate !== this.playRateController_.getDefaultRate()) { this.cancelTrickPlay(); this.targetLatencyReached_ = Date.now(); } } /** * Callback for video progress events * * @private */ onVideoProgress_() { if (!this.video_) { return; } let hasNewCompletionPercent = false; const completionRatio = this.video_.currentTime / this.video_.duration; if (!isNaN(completionRatio)) { const percent = Math.round(100 * completionRatio); if (isNaN(this.completionPercent_)) { this.completionPercent_ = percent; hasNewCompletionPercent = true; } else { const newCompletionPercent = Math.max(this.completionPercent_, percent); if (this.completionPercent_ != newCompletionPercent) { this.completionPercent_ = newCompletionPercent; hasNewCompletionPercent = true; } } } if (hasNewCompletionPercent) { let event; if (this.completionPercent_ == 0) { event = shaka.Player.makeEvent_(shaka.util.FakeEvent.EventName.Started); } else if (this.completionPercent_ == 25) { event = shaka.Player.makeEvent_( shaka.util.FakeEvent.EventName.FirstQuartile); } else if (this.completionPercent_ == 50) { event = shaka.Player.makeEvent_( shaka.util.FakeEvent.EventName.Midpoint); } else if (this.completionPercent_ == 75) { event = shaka.Player.makeEvent_( shaka.util.FakeEvent.EventName.ThirdQuartile); } else if (this.completionPercent_ == 100) { event = shaka.Player.makeEvent_( shaka.util.FakeEvent.EventName.Complete); } if (event) { this.dispatchEvent(event); } } } /** * Callback from Playhead. * * @private */ onSeek_() { if (this.playheadObservers_) { this.playheadObservers_.notifyOfSeek(); } if (this.streamingEngine_) { this.streamingEngine_.seeked(); } if (this.bufferObserver_) { // If we seek into an unbuffered range, we should fire a 'buffering' event // immediately. If StreamingEngine can buffer fast enough, we may not // update our buffering tracking otherwise. this.pollBufferState_(); } } /** * Update AbrManager with variants while taking into account restrictions, * preferences, and ABR. * * On error, this dispatches an error event and returns false. * * @return {boolean} True if successful. * @private */ updateAbrManagerVariants_() { try { goog.asserts.assert(this.manifest_, 'Manifest should exist by now!'); this.manifestFilterer_.checkRestrictedVariants(this.manifest_); } catch (e) { this.onError_(e); return false; } const playableVariants = shaka.util.StreamUtils.getPlayableVariants( this.manifest_.variants); // Update the abr manager with newly filtered variants. const adaptationSet = this.currentAdaptationSetCriteria_.create( playableVariants); this.abrManager_.setVariants(Array.from(adaptationSet.values())); return true; } /** * Chooses a variant from all possible variants while taking into account * restrictions, preferences, and ABR. * * On error, this dispatches an error event and returns null. * * @param {boolean=} initialSelection * @return {?shaka.extern.Variant} * @private */ chooseVariant_(initialSelection = false) { if (this.updateAbrManagerVariants_()) { return this.abrManager_.chooseVariant(initialSelection); } else { return null; } } /** * Checks to re-enable variants that were temporarily disabled due to network * errors. If any variants are enabled this way, a new variant may be chosen * for playback. * @private */ checkVariants_() { goog.asserts.assert(this.manifest_, 'Should have manifest!'); const now = Date.now() / 1000; let hasVariantUpdate = false; /** @type {function(shaka.extern.Variant):string} */ const streamsAsString = (variant) => { let str = ''; if (variant.video) { str += 'video:' + variant.video.id; } if (variant.audio) { str += str ? '&' : ''; str += 'audio:' + variant.audio.id; } return str; }; let shouldStopTimer = true; for (const variant of this.manifest_.variants) { if (variant.disabledUntilTime > 0 && variant.disabledUntilTime <= now) { variant.disabledUntilTime = 0; hasVariantUpdate = true; shaka.log.v2('Re-enabled variant with ' + streamsAsString(variant)); } if (variant.disabledUntilTime > 0) { shouldStopTimer = false; } } if (shouldStopTimer) { this.checkVariantsTimer_.stop(); } if (hasVariantUpdate) { // Reconsider re-enabled variant for ABR switching. this.chooseVariantAndSwitch_( /* clearBuffer= */ false, /* safeMargin= */ undefined, /* force= */ false, /* fromAdaptation= */ false); } } /** * Choose a text stream from all possible text streams while taking into * account user preference. * * @return {?shaka.extern.Stream} * @private */ chooseTextStream_() { const subset = shaka.util.StreamUtils.filterStreamsByLanguageAndRole( this.manifest_.textStreams, this.currentTextLanguage_, this.currentTextRole_, this.currentTextForced_); return subset[0] || null; } /** * Chooses a new Variant. If the new variant differs from the old one, it * adds the new one to the switch history and switches to it. * * Called after a config change, a key status event, or an explicit language * change. * * @param {boolean=} clearBuffer Optional clear buffer or not when * switch to new variant * Defaults to true if not provided * @param {number=} safeMargin Optional amount of buffer (in seconds) to * retain when clearing the buffer. * Defaults to 0 if not provided. Ignored if clearBuffer is false. * @private */ chooseVariantAndSwitch_(clearBuffer = true, safeMargin = 0, force = false, fromAdaptation = true) { goog.asserts.assert(this.config_, 'Must not be destroyed'); // Because we're running this after a config change (manual language // change) or a key status event, it is always okay to clear the buffer // here. const chosenVariant = this.chooseVariant_(); if (chosenVariant) { this.switchVariant_(chosenVariant, fromAdaptation, clearBuffer, safeMargin, force); } } /** * @param {shaka.extern.Variant} variant * @param {boolean} fromAdaptation * @param {boolean} clearBuffer * @param {number} safeMargin * @param {boolean=} force * @private */ switchVariant_(variant, fromAdaptation, clearBuffer, safeMargin, force = false) { const currentVariant = this.streamingEngine_.getCurrentVariant(); if (variant == currentVariant) { shaka.log.debug('Variant already selected.'); // If you want to clear the buffer, we force to reselect the same variant. // We don't need to reset the timestampOffset since it's the same variant, // so 'adaptation' isn't passed here. if (clearBuffer) { this.streamingEngine_.switchVariant(variant, clearBuffer, safeMargin, /* force= */ true); } return; } // Add entries to the history. this.addVariantToSwitchHistory_(variant, fromAdaptation); this.streamingEngine_.switchVariant( variant, clearBuffer, safeMargin, force, /* adaptation= */ fromAdaptation); let oldTrack = null; if (currentVariant) { oldTrack = shaka.util.StreamUtils.variantToTrack(currentVariant); } const newTrack = shaka.util.StreamUtils.variantToTrack(variant); if (fromAdaptation) { // Dispatch an 'adaptation' event this.onAdaptation_(oldTrack, newTrack); } else { // Dispatch a 'variantchanged' event this.onVariantChanged_(oldTrack, newTrack); } } /** * @param {AudioTrack} track * @private */ switchHtml5Track_(track) { goog.asserts.assert(this.video_ && this.video_.audioTracks, 'Video and video.audioTracks should not be null!'); const audioTracks = Array.from(this.video_.audioTracks); const currentTrack = audioTracks.find((t) => t.enabled); // This will reset the "enabled" of other tracks to false. track.enabled = true; if (!currentTrack) { return; } // AirPlay does not reset the "enabled" of other tracks to false, so // it must be changed by hand. if (track.id !== currentTrack.id) { currentTrack.enabled = false; } const oldTrack = shaka.util.StreamUtils.html5AudioTrackToTrack(currentTrack); const newTrack = shaka.util.StreamUtils.html5AudioTrackToTrack(track); this.onVariantChanged_(oldTrack, newTrack); } /** * Decide during startup if text should be streamed/shown. * @private */ setInitialTextState_(initialVariant, initialTextStream) { // Check if we should show text (based on difference between audio and text // languages). if (initialTextStream) { if (initialVariant.audio && this.shouldInitiallyShowText_( initialVariant.audio, initialTextStream)) { this.isTextVisible_ = true; } if (this.isTextVisible_) { // If the cached value says to show text, then update the text displayer // since it defaults to not shown. this.mediaSourceEngine_.getTextDisplayer().setTextVisibility(true); goog.asserts.assert(this.shouldStreamText_(), 'Should be streaming text'); } this.onTextTrackVisibility_(); } else { this.isTextVisible_ = false; } } /** * Check if we should show text on screen automatically. * * @param {shaka.extern.Stream} audioStream * @param {shaka.extern.Stream} textStream * @return {boolean} * @private */ shouldInitiallyShowText_(audioStream, textStream) { const AutoShowText = shaka.config.AutoShowText; if (this.config_.autoShowText == AutoShowText.NEVER) { return false; } if (this.config_.autoShowText == AutoShowText.ALWAYS) { return true; } const LanguageUtils = shaka.util.LanguageUtils; /** @type {string} */ const preferredTextLocale = LanguageUtils.normalize(this.config_.preferredTextLanguage); /** @type {string} */ const textLocale = LanguageUtils.normalize(textStream.language); if (this.config_.autoShowText == AutoShowText.IF_PREFERRED_TEXT_LANGUAGE) { // Only the text language match matters. return LanguageUtils.areLanguageCompatible( textLocale, preferredTextLocale); } if (this.config_.autoShowText == AutoShowText.IF_SUBTITLES_MAY_BE_NEEDED) { /* The text should automatically be shown if the text is * language-compatible with the user's text language preference, but not * compatible with the audio. These are cases where we deduce that * subtitles may be needed. * * For example: * preferred | chosen | chosen | * text | text | audio | show * ----------------------------------- * en-CA | en | jp | true * en | en-US | fr | true * fr-CA | en-US | jp | false * en-CA | en-US | en-US | false * */ /** @type {string} */ const audioLocale = LanguageUtils.normalize(audioStream.language); return ( LanguageUtils.areLanguageCompatible(textLocale, preferredTextLocale) && !LanguageUtils.areLanguageCompatible(audioLocale, textLocale)); } shaka.log.alwaysWarn('Invalid autoShowText setting!'); return false; } /** * Callback from StreamingEngine. * * @private */ onManifestUpdate_() { if (this.parser_ && this.parser_.update) { this.parser_.update(); } } /** * Callback from StreamingEngine. * * @param {number} start * @param {number} end * @param {shaka.util.ManifestParserUtils.ContentType} contentType * @param {boolean} isMuxed * * @private */ onSegmentAppended_(start, end, contentType, isMuxed) { // When we append a segment to media source (via streaming engine) we are // changing what data we have buffered, so notify the playhead of the // change. if (this.playhead_) { this.playhead_.notifyOfBufferingChange(); // Skip the initial buffer gap const startTime = this.mediaSourceEngine_.bufferStart(contentType); if ( !this.isLive() && // If not paused then GapJumpingController will handle this gap. this.video_.paused && startTime != null && startTime > 0 && this.playhead_.getTime() < startTime ) { this.playhead_.setStartTime(startTime); } } this.pollBufferState_(); // Dispatch an event for users to consume, too. const data = new Map() .set('start', start) .set('end', end) .set('contentType', contentType) .set('isMuxed', isMuxed); this.dispatchEvent(shaka.Player.makeEvent_( shaka.util.FakeEvent.EventName.SegmentAppended, data)); } /** * Callback from AbrManager. * * @param {shaka.extern.Variant} variant * @param {boolean=} clearBuffer * @param {number=} safeMargin Optional amount of buffer (in seconds) to * retain when clearing the buffer. * Defaults to 0 if not provided. Ignored if clearBuffer is false. * @private */ switch_(variant, clearBuffer = false, safeMargin = 0) { shaka.log.debug('switch_'); goog.asserts.assert(this.config_.abr.enabled, 'AbrManager should not call switch while disabled!'); if (!this.manifest_) { // It could come from a preload manager operation. return; } if (!this.streamingEngine_) { // There's no way to change it. return; } if (variant == this.streamingEngine_.getCurrentVariant()) { // This isn't a change. return; } this.switchVariant_(variant, /* fromAdaptation= */ true, clearBuffer, safeMargin); } /** * Dispatches an 'adaptation' event. * @param {?shaka.extern.Track} from * @param {shaka.extern.Track} to * @private */ onAdaptation_(from, to) { // Delay the 'adaptation' event so that StreamingEngine has time to absorb // the changes before the user tries to query it. const data = new Map() .set('oldTrack', from) .set('newTrack', to); if (this.lcevcDec_) { this.lcevcDec_.updateVariant(to, this.getManifestType()); } const event = shaka.Player.makeEvent_( shaka.util.FakeEvent.EventName.Adaptation, data); this.delayDispatchEvent_(event); } /** * Dispatches a 'trackschanged' event. * @private */ onTracksChanged_() { // Delay the 'trackschanged' event so StreamingEngine has time to absorb the // changes before the user tries to query it. const event = shaka.Player.makeEvent_( shaka.util.FakeEvent.EventName.TracksChanged); this.delayDispatchEvent_(event); } /** * Dispatches a 'variantchanged' event. * @param {?shaka.extern.Track} from * @param {shaka.extern.Track} to * @private */ onVariantChanged_(from, to) { // Delay the 'variantchanged' event so StreamingEngine has time to absorb // the changes before the user tries to query it. const data = new Map() .set('oldTrack', from) .set('newTrack', to); if (this.lcevcDec_) { this.lcevcDec_.updateVariant(to, this.getManifestType()); } const event = shaka.Player.makeEvent_( shaka.util.FakeEvent.EventName.VariantChanged, data); this.delayDispatchEvent_(event); } /** * Dispatches a 'textchanged' event. * @private */ onTextChanged_() { // Delay the 'textchanged' event so StreamingEngine time to absorb the // changes before the user tries to query it. const event = shaka.Player.makeEvent_( shaka.util.FakeEvent.EventName.TextChanged); this.delayDispatchEvent_(event); } /** @private */ onTextTrackVisibility_() { const event = shaka.Player.makeEvent_( shaka.util.FakeEvent.EventName.TextTrackVisibility); this.delayDispatchEvent_(event); } /** @private */ onAbrStatusChanged_() { // Restore disabled variants if abr get disabled if (!this.config_.abr.enabled) { this.restoreDisabledVariants_(); } const data = (new Map()).set('newStatus', this.config_.abr.enabled); this.delayDispatchEvent_(shaka.Player.makeEvent_( shaka.util.FakeEvent.EventName.AbrStatusChanged, data)); } /** * @param {boolean} updateAbrManager * @private */ restoreDisabledVariants_(updateAbrManager=true) { if (this.loadMode_ != shaka.Player.LoadMode.MEDIA_SOURCE) { return; } goog.asserts.assert(this.manifest_, 'Should have manifest!'); shaka.log.v2('Restoring all disabled streams...'); this.checkVariantsTimer_.stop(); for (const variant of this.manifest_.variants) { variant.disabledUntilTime = 0; } if (updateAbrManager) { this.updateAbrManagerVariants_(); } } /** * Temporarily disable all variants containing |stream| * @param {shaka.extern.Stream} stream * @param {number} disableTime * @return {boolean} */ disableStream(stream, disableTime) { if (!this.config_.abr.enabled || this.loadMode_ === shaka.Player.LoadMode.DESTROYED) { return false; } if (!navigator.onLine) { // Don't disable variants if we're completely offline, or else we end up // rapidly restricting all of them. return false; } // It only makes sense to disable a stream if we have an alternative else we // end up disabling all variants. const hasAltStream = this.manifest_.variants.some((variant) => { const altStream = variant[stream.type]; if (altStream && altStream.id !== stream.id && !variant.disabledUntilTime) { if (shaka.util.StreamUtils.isAudio(stream)) { return stream.language === altStream.language; } return true; } return false; }); if (hasAltStream) { let didDisableStream = false; for (const variant of this.manifest_.variants) { const candidate = variant[stream.type]; if (candidate && candidate.id === stream.id) { variant.disabledUntilTime = (Date.now() / 1000) + disableTime; didDisableStream = true; shaka.log.v2( 'Disabled stream ' + stream.type + ':' + stream.id + ' for ' + disableTime + ' seconds...'); } } goog.asserts.assert(didDisableStream, 'Must have disabled stream'); this.checkVariantsTimer_.tickEvery(1); // Get the safeMargin to ensure a seamless playback const {video} = this.getBufferedInfo(); const safeMargin = video.reduce((size, {start, end}) => size + end - start, 0); // Update abr manager variants and switch to recover playback this.chooseVariantAndSwitch_( /* clearBuffer= */ false, /* safeMargin= */ safeMargin, /* force= */ true, /* fromAdaptation= */ false); return true; } shaka.log.warning( 'No alternate stream found for active ' + stream.type + ' stream. ' + 'Will ignore request to disable stream...'); return false; } /** * @param {!shaka.util.Error} error * @private */ async onError_(error) { goog.asserts.assert(error instanceof shaka.util.Error, 'Wrong error type!'); // Errors dispatched after |destroy| is called are not meaningful and should // be safe to ignore. if (this.loadMode_ == shaka.Player.LoadMode.DESTROYED) { return; } if (error.severity === shaka.util.Error.Severity.RECOVERABLE) { this.stats_.addNonFatalError(); } let fireError = true; if (this.fullyLoaded_ && this.manifest_ && this.streamingEngine_ && (error.code == shaka.util.Error.Code.VIDEO_ERROR || error.code == shaka.util.Error.Code.MEDIA_SOURCE_OPERATION_FAILED || error.code == shaka.util.Error.Code.MEDIA_SOURCE_OPERATION_THREW || error.code == shaka.util.Error.Code.TRANSMUXING_FAILED)) { try { const ret = await this.streamingEngine_.resetMediaSource(); fireError = !ret; } catch (e) { fireError = true; } } if (!fireError) { return; } // Restore disabled variant if the player experienced a critical error. if (error.severity === shaka.util.Error.Severity.CRITICAL) { this.restoreDisabledVariants_(/* updateAbrManager= */ false); } const eventName = shaka.util.FakeEvent.EventName.Error; const event = shaka.Player.makeEvent_( eventName, (new Map()).set('detail', error)); this.dispatchEvent(event); if (event.defaultPrevented) { error.handled = true; } } /** * When we fire region events, we need to copy the information out of the * region to break the connection with the player's internal data. We do the * copy here because this is the transition point between the player and the * app. * * @param {!shaka.util.FakeEvent.EventName} eventName * @param {shaka.extern.TimelineRegionInfo} region * @param {shaka.util.FakeEventTarget=} eventTarget * * @private */ onRegionEvent_(eventName, region, eventTarget = this) { // Always make a copy to avoid exposing our internal data to the app. const clone = { schemeIdUri: region.schemeIdUri, value: region.value, startTime: region.startTime, endTime: region.endTime, id: region.id, eventElement: region.eventElement, eventNode: region.eventNode, }; const data = (new Map()).set('detail', clone); eventTarget.dispatchEvent(shaka.Player.makeEvent_(eventName, data)); } /** * When notified of a media quality change we need to emit a * MediaQualityChange event to the app. * * @param {shaka.extern.MediaQualityInfo} mediaQuality * @param {number} position * @param {boolean} audioTrackChanged This is to specify whether this should * trigger a MediaQualityChangedEvent or an AudioTrackChangedEvent. Defaults * to false to trigger MediaQualityChangedEvent. * * @private */ onMediaQualityChange_(mediaQuality, position, audioTrackChanged = false) { // Always make a copy to avoid exposing our internal data to the app. const clone = { bandwidth: mediaQuality.bandwidth, audioSamplingRate: mediaQuality.audioSamplingRate, codecs: mediaQuality.codecs, contentType: mediaQuality.contentType, frameRate: mediaQuality.frameRate, height: mediaQuality.height, mimeType: mediaQuality.mimeType, channelsCount: mediaQuality.channelsCount, pixelAspectRatio: mediaQuality.pixelAspectRatio, width: mediaQuality.width, label: mediaQuality.label, roles: mediaQuality.roles, language: mediaQuality.language, }; const data = new Map() .set('mediaQuality', clone) .set('position', position); this.dispatchEvent(shaka.Player.makeEvent_( audioTrackChanged ? shaka.util.FakeEvent.EventName.AudioTrackChanged : shaka.util.FakeEvent.EventName.MediaQualityChanged, data)); } /** * Turn the media element's error object into a Shaka Player error object. * * @return {shaka.util.Error} * @private */ videoErrorToShakaError_() { goog.asserts.assert(this.video_.error, 'Video error expected, but missing!'); if (!this.video_.error) { return null; } const code = this.video_.error.code; if (code == 1 /* MEDIA_ERR_ABORTED */) { // Ignore this error code, which should only occur when navigating away or // deliberately stopping playback of HTTP content. return null; } // Extra error information from MS Edge: let extended = this.video_.error.msExtendedCode; if (extended) { // Convert to unsigned: if (extended < 0) { extended += Math.pow(2, 32); } // Format as hex: extended = extended.toString(16); } // Extra error information from Chrome: const message = this.video_.error.message; return new shaka.util.Error( shaka.util.Error.Severity.CRITICAL, shaka.util.Error.Category.MEDIA, shaka.util.Error.Code.VIDEO_ERROR, code, extended, message); } /** * @param {!Event} event * @private */ onVideoError_(event) { const error = this.videoErrorToShakaError_(); if (!error) { return; } this.onError_(error); } /** * @param {!Object.<string, string>} keyStatusMap A map of hex key IDs to * statuses. * @private */ onKeyStatus_(keyStatusMap) { goog.asserts.assert(this.streamingEngine_, 'Cannot be called in src= mode'); const event = shaka.Player.makeEvent_( shaka.util.FakeEvent.EventName.KeyStatusChanged); this.dispatchEvent(event); let keyIds = Object.keys(keyStatusMap); if (keyIds.length == 0) { shaka.log.warning( 'Got a key status event without any key statuses, so we don\'t ' + 'know the real key statuses. If we don\'t have all the keys, ' + 'you\'ll need to set restrictions so we don\'t select those tracks.'); } // Non-standard version of global key status. Modify it to match standard // behavior. if (keyIds.length == 1 && keyIds[0] == '') { keyIds = ['00']; keyStatusMap = {'00': keyStatusMap['']}; } // If EME is using a synthetic key ID, the only key ID is '00' (a single 0 // byte). In this case, it is only used to report global success/failure. // See note about old platforms in: https://bit.ly/2tpez5Z const isGlobalStatus = keyIds.length == 1 && keyIds[0] == '00'; if (isGlobalStatus) { shaka.log.warning( 'Got a synthetic key status event, so we don\'t know the real key ' + 'statuses. If we don\'t have all the keys, you\'ll need to set ' + 'restrictions so we don\'t select those tracks.'); } const restrictedStatuses = shaka.media.ManifestFilterer.restrictedStatuses; let tracksChanged = false; goog.asserts.assert(this.drmEngine_, 'drmEngine should be non-null here.'); // Only filter tracks for keys if we have some key statuses to look at. if (keyIds.length) { for (const variant of this.manifest_.variants) { const streams = shaka.util.StreamUtils.getVariantStreams(variant); for (const stream of streams) { const originalAllowed = variant.allowedByKeySystem; // Only update if we have key IDs for the stream. If the keys aren't // all present, then the track should be restricted. if (stream.keyIds.size) { variant.allowedByKeySystem = true; for (const keyId of stream.keyIds) { const keyStatus = keyStatusMap[isGlobalStatus ? '00' : keyId]; if (keyStatus || this.drmEngine_.hasManifestInitData()) { variant.allowedByKeySystem = variant.allowedByKeySystem && !!keyStatus && !restrictedStatuses.includes(keyStatus); } } } if (originalAllowed != variant.allowedByKeySystem) { tracksChanged = true; } } // for (const stream of streams) } // for (const variant of this.manifest_.variants) } // if (keyIds.size) if (tracksChanged) { this.onTracksChanged_(); const variantsUpdated = this.updateAbrManagerVariants_(); if (!variantsUpdated) { return; } } const currentVariant = this.streamingEngine_.getCurrentVariant(); if (currentVariant && !currentVariant.allowedByKeySystem) { shaka.log.debug('Choosing new streams after key status changed'); this.chooseVariantAndSwitch_(); } } /** * @return {boolean} true if we should stream text right now. * @private */ shouldStreamText_() { return this.config_.streaming.alwaysStreamText || this.isTextTrackVisible(); } /** * Applies playRangeStart and playRangeEnd to the given timeline. This will * only affect non-live content. * * @param {shaka.media.PresentationTimeline} timeline * @param {number} playRangeStart * @param {number} playRangeEnd * * @private */ static applyPlayRange_(timeline, playRangeStart, playRangeEnd) { if (playRangeStart > 0) { if (timeline.isLive()) { shaka.log.warning( '|playRangeStart| has been configured for live content. ' + 'Ignoring the setting.'); } else { timeline.setUserSeekStart(playRangeStart); } } // If the playback has been configured to end before the end of the // presentation, update the duration unless it's live content. const fullDuration = timeline.getDuration(); if (playRangeEnd < fullDuration) { if (timeline.isLive()) { shaka.log.warning( '|playRangeEnd| has been configured for live content. ' + 'Ignoring the setting.'); } else { timeline.setDuration(playRangeEnd); } } } /** * Fire an event, but wait a little bit so that the immediate execution can * complete before the event is handled. * * @param {!shaka.util.FakeEvent} event * @private */ async delayDispatchEvent_(event) { // Wait until the next interpreter cycle. await Promise.resolve(); // Only dispatch the event if we are still alive. if (this.loadMode_ != shaka.Player.LoadMode.DESTROYED) { this.dispatchEvent(event); } } /** * Get the normalized languages for a group of tracks. * * @param {!Array.<?shaka.extern.Track>} tracks * @return {!Set.<string>} * @private */ static getLanguagesFrom_(tracks) { const languages = new Set(); for (const track of tracks) { if (track.language) { languages.add(shaka.util.LanguageUtils.normalize(track.language)); } else { languages.add('und'); } } return languages; } /** * Get all permutations of normalized languages and role for a group of * tracks. * * @param {!Array.<?shaka.extern.Track>} tracks * @return {!Array.<shaka.extern.LanguageRole>} * @private */ static getLanguageAndRolesFrom_(tracks) { /** @type {!Map.<string, !Set>} */ const languageToRoles = new Map(); /** @type {!Map.<string, !Map.<string, string>>} */ const languageRoleToLabel = new Map(); for (const track of tracks) { let language = 'und'; let roles = []; if (track.language) { language = shaka.util.LanguageUtils.normalize(track.language); } if (track.type == 'variant') { roles = track.audioRoles; } else { roles = track.roles; } if (!roles || !roles.length) { // We must have an empty role so that we will still get a language-role // entry from our Map. roles = ['']; } if (!languageToRoles.has(language)) { languageToRoles.set(language, new Set()); } for (const role of roles) { languageToRoles.get(language).add(role); if (track.label) { if (!languageRoleToLabel.has(language)) { languageRoleToLabel.set(language, new Map()); } languageRoleToLabel.get(language).set(role, track.label); } } } // Flatten our map to an array of language-role pairs. const pairings = []; languageToRoles.forEach((roles, language) => { for (const role of roles) { let label = null; if (languageRoleToLabel.has(language) && languageRoleToLabel.get(language).has(role)) { label = languageRoleToLabel.get(language).get(role); } pairings.push({language, role, label}); } }); return pairings; } /** * Assuming the player is playing content with media source, check if the * player has buffered enough content to make it to the end of the * presentation. * * @return {boolean} * @private */ isBufferedToEndMS_() { goog.asserts.assert( this.video_, 'We need a video element to get buffering information'); goog.asserts.assert( this.mediaSourceEngine_, 'We need a media source engine to get buffering information'); goog.asserts.assert( this.manifest_, 'We need a manifest to get buffering information'); // This is a strong guarantee that we are buffered to the end, because it // means the playhead is already at that end. if (this.video_.ended) { return true; } // This means that MediaSource has buffered the final segment in all // SourceBuffers and is no longer accepting additional segments. if (this.mediaSourceEngine_.ended()) { return true; } // Live streams are "buffered to the end" when they have buffered to the // live edge or beyond (into the region covered by the presentation delay). if (this.manifest_.presentationTimeline.isLive()) { const liveEdge = this.manifest_.presentationTimeline.getSegmentAvailabilityEnd(); const bufferEnd = shaka.media.TimeRangesUtils.bufferEnd(this.video_.buffered); if (bufferEnd != null && bufferEnd >= liveEdge) { return true; } } return false; } /** * Assuming the player is playing content with src=, check if the player has * buffered enough content to make it to the end of the presentation. * * @return {boolean} * @private */ isBufferedToEndSrc_() { goog.asserts.assert( this.video_, 'We need a video element to get buffering information'); // This is a strong guarantee that we are buffered to the end, because it // means the playhead is already at that end. if (this.video_.ended) { return true; } // If we have buffered to the duration of the content, it means we will have // enough content to buffer to the end of the presentation. const bufferEnd = shaka.media.TimeRangesUtils.bufferEnd(this.video_.buffered); // Because Safari's native HLS reports slightly inaccurate values for // bufferEnd here, we use a fudge factor. Without this, we can end up in a // buffering state at the end of the stream. See issue #2117. const fudge = 1; // 1000 ms return bufferEnd != null && bufferEnd >= this.video_.duration - fudge; } /** * Create an error for when we purposely interrupt a load operation. * * @return {!shaka.util.Error} * @private */ createAbortLoadError_() { return new shaka.util.Error( shaka.util.Error.Severity.CRITICAL, shaka.util.Error.Category.PLAYER, shaka.util.Error.Code.LOAD_INTERRUPTED); }};/** * In order to know what method of loading the player used for some content, we * have this enum. It lets us know if content has not been loaded, loaded with * media source, or loaded with src equals. * * This enum has a low resolution, because it is only meant to express the * outer limits of the various states that the player is in. For example, when * someone calls a public method on player, it should not matter if they have * initialized drm engine, it should only matter if they finished loading * content. * * @enum {number} * @export */shaka.Player.LoadMode = { 'DESTROYED': 0, 'NOT_LOADED': 1, 'MEDIA_SOURCE': 2, 'SRC_EQUALS': 3,};/** * The typical buffering threshold. When we have less than this buffered (in * seconds), we enter a buffering state. This specific value is based on manual * testing and evaluation across a variety of platforms. * * To make the buffering logic work in all cases, this "typical" threshold will * be overridden if the rebufferingGoal configuration is too low. * * @const {number} * @private */shaka.Player.TYPICAL_BUFFERING_THRESHOLD_ = 0.5;/** * @define {string} A version number taken from git at compile time. * @export */// eslint-disable-next-line no-useless-concatshaka.Player.version = 'v4.10.0' + '-uncompiled'; // x-release-please-version// Initialize the deprecation system using the version string we just set// on the player.shaka.Deprecate.init(shaka.Player.version);/** @private {!Object.<string, function():*>} */shaka.Player.supportPlugins_ = {};/** @private {?shaka.extern.IAdManager.Factory} */shaka.Player.adManagerFactory_ = null;/** * @const {string} */shaka.Player.TextTrackLabel = 'Shaka Player TextTrack';