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player.js
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player.js
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/**
* @license
* Copyright 2016 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
goog.provide('shaka.Player');
goog.require('goog.asserts');
goog.require('shaka.abr.SimpleAbrManager');
goog.require('shaka.log');
goog.require('shaka.media.DrmEngine');
goog.require('shaka.media.ManifestParser');
goog.require('shaka.media.MediaSourceEngine');
goog.require('shaka.media.Playhead');
goog.require('shaka.media.PlayheadObserver');
goog.require('shaka.media.SegmentReference');
goog.require('shaka.media.StreamingEngine');
goog.require('shaka.net.NetworkingEngine');
goog.require('shaka.text.SimpleTextDisplayer');
goog.require('shaka.util.CancelableChain');
goog.require('shaka.util.ConfigUtils');
goog.require('shaka.util.Error');
goog.require('shaka.util.EventManager');
goog.require('shaka.util.FakeEvent');
goog.require('shaka.util.FakeEventTarget');
goog.require('shaka.util.Functional');
goog.require('shaka.util.IDestroyable');
goog.require('shaka.util.ManifestParserUtils');
goog.require('shaka.util.MapUtils');
goog.require('shaka.util.PublicPromise');
goog.require('shaka.util.StreamUtils');
/**
* Construct a Player.
*
* @param {!HTMLMediaElement} video Any existing TextTracks attached to this
* element that were not created by Shaka will be disabled. A new TextTrack
* may be created to display captions or subtitles.
* @param {function(shaka.Player)=} opt_dependencyInjector Optional callback
* which is called to inject mocks into the Player. Used for testing.
*
* @constructor
* @struct
* @implements {shaka.util.IDestroyable}
* @extends {shaka.util.FakeEventTarget}
* @export
*/
shaka.Player = function(video, opt_dependencyInjector) {
shaka.util.FakeEventTarget.call(this);
/** @private {boolean} */
this.destroyed_ = false;
/** @private {HTMLMediaElement} */
this.video_ = video;
/**
* Only holds the visibility setting until a textDisplayer_ is created.
* @private {boolean}
*/
this.textVisibility_ = false;
/** @private {shakaExtern.TextDisplayer} */
this.textDisplayer_ = null;
/** @private {shaka.util.EventManager} */
this.eventManager_ = new shaka.util.EventManager();
/** @private {shaka.net.NetworkingEngine} */
this.networkingEngine_ = null;
/** @private {shaka.media.DrmEngine} */
this.drmEngine_ = null;
/** @private {MediaSource} */
this.mediaSource_ = null;
/** @private {shaka.media.MediaSourceEngine} */
this.mediaSourceEngine_ = null;
/** @private {Promise} */
this.mediaSourceOpen_ = null;
/** @private {shaka.media.Playhead} */
this.playhead_ = null;
/** @private {shaka.media.PlayheadObserver} */
this.playheadObserver_ = null;
/** @private {shaka.media.StreamingEngine} */
this.streamingEngine_ = null;
/** @private {shakaExtern.ManifestParser} */
this.parser_ = null;
/** @private {?shakaExtern.Manifest} */
this.manifest_ = null;
/** @private {?string} */
this.manifestUri_ = null;
/** @private {shakaExtern.AbrManager} */
this.abrManager_ = 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.<number>} */
this.loadingTextStreamIds_ = [];
/** @private {boolean} */
this.buffering_ = false;
/** @private {boolean} */
this.switchingPeriods_ = true;
/** @private {shaka.util.CancelableChain} */
this.loadChain_ = null;
/** @private {Promise} */
this.unloadChain_ = null;
/** @private {?shakaExtern.Variant} */
this.deferredVariant_ = null;
/** @private {boolean} */
this.deferredVariantClearBuffer_ = false;
/** @private {?shakaExtern.Stream} */
this.deferredTextStream_ = null;
/** @private {!Array.<shakaExtern.TimelineRegionInfo>} */
this.pendingTimelineRegions_ = [];
/**
* A map of Period number to a map of content type to stream id.
* @private {!Object.<number, !Object.<string, number>>}
*/
this.activeStreamsByPeriod_ = {};
/** @private {?shakaExtern.PlayerConfiguration} */
this.config_ = this.defaultConfig_();
/** @private {{width: number, height: number}} */
this.maxHwRes_ = { width: Infinity, height: Infinity };
/** @private {shakaExtern.Stats} */
this.stats_ = this.getCleanStats_();
/** @private {number} */
this.lastTimeStatsUpdateTimestamp_ = 0;
/** @private {string} */
this.currentAudioLanguage_ = this.config_.preferredAudioLanguage;
/** @private {string} */
this.currentTextLanguage_ = this.config_.preferredTextLanguage;
/** @private {string} */
this.currentVariantRole_ = '';
/** @private {string} */
this.currentTextRole_ = '';
/**
* Deprecated. To be removed in v2.3.
* @private {boolean}
*/
this.infiniteRetriesForLiveStreams_ = true;
if (opt_dependencyInjector)
opt_dependencyInjector(this);
this.networkingEngine_ = this.createNetworkingEngine();
this.initialize_();
};
goog.inherits(shaka.Player, shaka.util.FakeEventTarget);
/**
* After destruction, a Player object cannot be used again.
*
* @override
* @export
*/
shaka.Player.prototype.destroy = function() {
this.destroyed_ = true;
var cancelation = Promise.resolve();
if (this.loadChain_) {
// A load is in progress. Cancel it.
cancelation = this.loadChain_.cancel(new shaka.util.Error(
shaka.util.Error.Severity.CRITICAL,
shaka.util.Error.Category.PLAYER,
shaka.util.Error.Code.LOAD_INTERRUPTED));
}
return cancelation.then(function() {
var p = Promise.all([
// We need to destroy the current fields as well as waiting for an
// existing unload to complete. It is fine to call destroyStreaming_ if
// there is an unload since it resets the fields immediately.
this.unloadChain_,
this.destroyStreaming_(),
this.eventManager_ ? this.eventManager_.destroy() : null,
this.networkingEngine_ ? this.networkingEngine_.destroy() : null,
this.textDisplayer_ ? this.textDisplayer_.destroy() : null
]);
this.video_ = null;
this.textVisibility_ = false;
this.textDisplayer_ = null;
this.eventManager_ = null;
this.abrManager_ = null;
this.networkingEngine_ = null;
this.config_ = null;
return p;
}.bind(this));
};
/**
* @define {string} A version number taken from git at compile time.
*/
goog.define('GIT_VERSION', 'v2.1.0-debug');
/**
* @const {string}
* @export
*/
shaka.Player.version = GIT_VERSION;
/**
* @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 'category' and
* 'code' properties will identify the specific error that occurred. In an
* uncompiled build, you can also use the 'message' and 'stack' properties
* to debug.
* @exportDoc
*/
/**
* @event shaka.Player.EmsgEvent
* @description Fired when a non-typical emsg is found in a segment.
* @property {string} type
* 'emsg'
* @property {shakaExtern.EmsgInfo} detail
* An object which contains the content of the emsg box.
* @exportDoc
*/
/**
* @event shaka.Player.TimelineRegionAdded
* @description Fired when a media timeline region is added.
* @property {string} type
* 'timelineregionadded'
* @property {shakaExtern.TimelineRegionInfo} detail
* An object which contains a description of the region.
* @exportDoc
*/
/**
* @event shaka.Player.TimelineRegionEnter
* @description Fired when the playhead enters a timeline region.
* @property {string} type
* 'timelineregionenter'
* @property {shakaExtern.TimelineRegionInfo} detail
* An object which contains a description of the region.
* @exportDoc
*/
/**
* @event shaka.Player.TimelineRegionExit
* @description Fired when the playhead exits a timeline region.
* @property {string} type
* 'timelineregionexit'
* @property {shakaExtern.TimelineregionInfo} detail
* An object which contains a description of the region.
* @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.
* Used by the Cast receiver to determine idle state.
* @property {string} type
* 'loading'
* @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 changing periods 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 selectVariantTrack()
* selectTextTrack(), selectAudioLanguage() or selectTextLanguage().
* @property {string} type
* 'adaptation'
* @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.LargeGapEvent
* @description Fired when the playhead enters a large gap. If
* |config.streaming.jumpLargeGaps| is set, the default action of this event
* is to jump the gap; this can be prevented by calling preventDefault() on
* the event object.
* @property {string} type
* 'largegap'
* @property {number} currentTime
* The current time of the playhead.
* @property {number} gapSize
* The size of the gap, in seconds.
* @exportDoc
*/
/** @private {!Object.<string, function():*>} */
shaka.Player.supportPlugins_ = {};
/**
* Registers a plugin callback that will be called with support(). The
* callback will return the value that will be stored in the return value from
* support().
*
* @param {string} name
* @param {function():*} callback
* @export
*/
shaka.Player.registerSupportPlugin = function(name, callback) {
shaka.Player.supportPlugins_[name] = callback;
};
/**
* 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
*/
shaka.Player.isBrowserSupported = function() {
// Basic features needed for the library to be usable.
var basic = !!window.Promise && !!window.Uint8Array &&
!!Array.prototype.forEach;
return basic &&
shaka.media.MediaSourceEngine.isBrowserSupported() &&
shaka.media.DrmEngine.isBrowserSupported();
};
/**
* 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.
*
* NOTE: This may show a request to the user for permission.
*
* @see https://goo.gl/ovYLvl
* @return {!Promise.<shakaExtern.SupportType>}
* @export
*/
shaka.Player.probeSupport = function() {
goog.asserts.assert(shaka.Player.isBrowserSupported(),
'Must have basic support');
return shaka.media.DrmEngine.probeSupport().then(function(drm) {
var manifest = shaka.media.ManifestParser.probeSupport();
var media = shaka.media.MediaSourceEngine.probeSupport();
var ret = {
manifest: manifest,
media: media,
drm: drm
};
var plugins = shaka.Player.supportPlugins_;
for (var name in plugins) {
ret[name] = plugins[name]();
}
return ret;
});
};
/**
* Load a manifest.
*
* @param {string} manifestUri
* @param {number=} opt_startTime Optional start time, in seconds, to begin
* playback. Defaults to 0 for VOD and to the live edge for live.
* @param {shakaExtern.ManifestParser.Factory=} opt_manifestParserFactory
* Optional manifest parser factory to override auto-detection or use an
* unregistered parser.
* @return {!Promise} Resolved when the manifest has been loaded and playback
* has begun; rejected when an error occurs or the call was interrupted by
* destroy(), unload() or another call to load().
* @export
*/
shaka.Player.prototype.load = function(manifestUri, opt_startTime,
opt_manifestParserFactory) {
var unloadPromise = this.unload();
var loadChain = new shaka.util.CancelableChain();
this.loadChain_ = loadChain;
this.dispatchEvent(new shaka.util.FakeEvent('loading'));
var startTime = Date.now();
return loadChain.then(function() {
return unloadPromise;
}).then(function() {
// Not tracked in stats because it should be insignificant.
// Logged in case it is not.
shaka.log.debug('Unload latency:', (Date.now() - startTime) / 1000);
this.stats_ = this.getCleanStats_();
this.eventManager_.listen(this.video_, 'playing',
this.updateState_.bind(this));
this.eventManager_.listen(this.video_, 'pause',
this.updateState_.bind(this));
this.eventManager_.listen(this.video_, 'ended',
this.updateState_.bind(this));
var abrManagerFactory = this.config_.abrFactory;
this.abrManager_ = new abrManagerFactory();
this.configureAbrManager_();
this.textDisplayer_ = new this.config_.textDisplayFactory();
this.textDisplayer_.setTextVisibility(this.textVisibility_);
goog.asserts.assert(this.networkingEngine_, 'Must not be destroyed');
return shaka.media.ManifestParser.getFactory(
manifestUri,
this.networkingEngine_,
this.config_.manifest.retryParameters,
opt_manifestParserFactory);
}.bind(this)).then(function(factory) {
this.parser_ = new factory();
this.parser_.configure(this.config_.manifest);
goog.asserts.assert(this.networkingEngine_, 'Must not be destroyed');
var playerInterface = {
networkingEngine: this.networkingEngine_,
filterNewPeriod: this.filterNewPeriod_.bind(this),
filterAllPeriods: this.filterAllPeriods_.bind(this),
onTimelineRegionAdded: this.onTimelineRegionAdded_.bind(this),
onEvent: this.onEvent_.bind(this),
onError: this.onError_.bind(this)
};
if (this.parser_.start.length > 2) {
goog.asserts.assert(false, 'Old ManifestParser interface is deprecated');
shaka.log.warning(
'The ManifestParser interface has changed. Please upgrade your ' +
'plugin to accept the PlayerInterface structure. See the ' +
'ManifestParser documentation for details.');
// Use a string index here so the compiler doesn't complain about the
// incorrect arguments.
return this.parser_['start'](
manifestUri, this.networkingEngine_, playerInterface.filterNewPeriod,
playerInterface.onError, playerInterface.onEvent);
}
return this.parser_.start(manifestUri, playerInterface);
}.bind(this)).then(function(manifest) {
// When there is a variant with video and audio, filter out all
// variants which lack one or the other.
// This is to avoid problems where we choose audio-only variants because
// they have lower bandwidth, when there are variants with video available.
var hasAVVariant = manifest.periods.some(function(period) {
return period.variants.some(function(variant) {
return variant.video && variant.audio;
});
});
if (hasAVVariant) {
shaka.log.debug('Found variant with audio and video content, ' +
'so filtering all periods.');
manifest.periods.forEach(function(period) {
period.variants = period.variants.filter(function(variant) {
return variant.video && variant.audio;
});
});
}
if (manifest.periods.length == 0) {
throw new shaka.util.Error(
shaka.util.Error.Severity.CRITICAL,
shaka.util.Error.Category.MANIFEST,
shaka.util.Error.Code.NO_PERIODS);
}
this.manifest_ = manifest;
this.manifestUri_ = manifestUri;
this.drmEngine_ = this.createDrmEngine();
this.drmEngine_.configure(this.config_.drm);
return this.drmEngine_.init(manifest, false /* isOffline */);
}.bind(this)).then(function() {
// Re-filter the manifest after DRM has been initialized.
this.filterAllPeriods_(this.manifest_.periods);
this.lastTimeStatsUpdateTimestamp_ = Date.now() / 1000;
// Copy preferred languages from the config again, in case the config was
// changed between construction and playback.
this.currentAudioLanguage_ = this.config_.preferredAudioLanguage;
this.currentTextLanguage_ = this.config_.preferredTextLanguage;
var fullDuration = this.manifest_.presentationTimeline.getDuration();
var playRangeEnd = this.config_.playRangeEnd;
var playRangeStart = this.config_.playRangeStart;
if (playRangeStart > 0) {
if (this.isLive()) {
shaka.log.warning('PlayerConfiguration.playRangeStart has been ' +
'configured for live content. Ignoring the setting.');
} else {
this.manifest_.presentationTimeline.setAvailabilityStart(
playRangeStart);
}
}
// If the playback has been configured to end before the end of the
// presentation, update the duration unless it's live content.
if (playRangeEnd < fullDuration) {
if (this.isLive()) {
shaka.log.warning('PlayerConfiguration.playRangeEnd has been ' +
'configured for live content. Ignoring the setting.');
} else {
this.manifest_.presentationTimeline.setDuration(playRangeEnd);
}
}
// Wait for MediaSource to open before continuing.
return Promise.all([
this.drmEngine_.attach(this.video_),
this.mediaSourceOpen_
]);
}.bind(this)).then(function() {
if (this.abrManager_['chooseStreams']) {
shaka.log.warning('AbrManager API has changed. ' +
'The SwitchCallback signature has changed to accept a variant ' +
'instead of a map. Please update your AbrManager. ' +
'The old API will be removed in v2.3.');
this.abrManager_['init'](this.switchV21_.bind(this));
} else {
this.abrManager_.init(this.switch_.bind(this));
}
// MediaSource is open, so create the Playhead, MediaSourceEngine, and
// StreamingEngine.
var startTime = opt_startTime || this.config_.playRangeStart;
this.playhead_ = this.createPlayhead(startTime);
this.playheadObserver_ = this.createPlayheadObserver();
this.mediaSourceEngine_ = this.createMediaSourceEngine();
this.streamingEngine_ = this.createStreamingEngine();
this.streamingEngine_.configure(this.config_.streaming);
// If the content is multi-codec and the browser can play more than one of
// them, choose codecs now before we initialize streaming.
this.chooseCodecsAndFilterManifest_();
return this.streamingEngine_.init();
}.bind(this)).then(function() {
if (this.config_.streaming.startAtSegmentBoundary) {
var time = this.adjustStartTime_(this.playhead_.getTime());
this.playhead_.setStartTime(time);
}
// Re-filter the manifest after streams have been chosen.
this.manifest_.periods.forEach(this.filterNewPeriod_.bind(this));
// Dispatch a 'trackschanged' event now that all initial filtering is done.
this.onTracksChanged_();
// Since the first streams just became active, send an adaptation event.
this.onAdaptation_();
// Now that we've filtered out variants that aren't compatible with the
// active one, update abr manager with filtered variants for the current
// period.
var currentPeriod = this.streamingEngine_.getCurrentPeriod();
var variants = shaka.util.StreamUtils.filterVariantsByLanguageAndRole(
currentPeriod, this.currentAudioLanguage_, this.currentVariantRole_);
this.abrManager_.setVariants(variants);
var hasPrimary = currentPeriod.variants.some(function(variant) {
return variant.primary;
});
if (!this.currentAudioLanguage_ && !hasPrimary) {
shaka.log.warning('No preferred audio language set. We will choose an ' +
'arbitrary language initially');
}
this.pendingTimelineRegions_.forEach(
this.playheadObserver_.addTimelineRegion.bind(this.playheadObserver_));
this.pendingTimelineRegions_ = [];
// Wait for the 'loadeddata' event to measure load() latency.
this.eventManager_.listenOnce(this.video_, 'loadeddata', function() {
// Compute latency in seconds (Date.now() gives ms):
var latency = (Date.now() - startTime) / 1000;
this.stats_.loadLatency = latency;
shaka.log.debug('Load latency:', latency);
}.bind(this));
this.loadChain_ = null;
}.bind(this)).finalize().catch(function(error) {
goog.asserts.assert(error instanceof shaka.util.Error,
'Wrong error type!');
shaka.log.debug('load() failed:', error);
// If we haven't started another load, clear the loadChain_ member.
if (this.loadChain_ == loadChain) {
this.loadChain_ = null;
this.dispatchEvent(new shaka.util.FakeEvent('unloading'));
}
return Promise.reject(error);
}.bind(this));
};
/**
* In case of multiple usable codecs, choose one based on lowest average
* bandwidth and filter out the rest.
* @private
*/
shaka.Player.prototype.chooseCodecsAndFilterManifest_ = function() {
function variantCodecs(variant) {
// Only consider the base of the codec string. For example, these should
// both be considered the same codec: avc1.42c01e, avc1.4d401f
var baseVideoCodec =
variant.video ? variant.video.codecs.split('.')[0] : '';
var baseAudioCodec =
variant.audio ? variant.audio.codecs.split('.')[0] : '';
return baseVideoCodec + '-' + baseAudioCodec;
}
// Organize variants into buckets by codecs.
var variantsByCodecs = {};
this.manifest_.periods.forEach(function(period) {
period.variants.forEach(function(variant) {
var codecs = variantCodecs(variant);
if (!(codecs in variantsByCodecs)) {
variantsByCodecs[codecs] = [];
}
variantsByCodecs[codecs].push(variant);
});
});
// Compute the average bandwidth for each group of variants.
// Choose the lowest-bandwidth codecs.
var bestCodecs = null;
var lowestAverageBandwidth = Infinity;
shaka.util.MapUtils.forEach(variantsByCodecs, function(codecs, variants) {
var sum = 0;
var num = 0;
variants.forEach(function(variant) {
sum += variant.bandwidth || 0;
++num;
});
var averageBandwidth = sum / num;
shaka.log.debug('codecs', codecs, 'avg bandwidth', averageBandwidth);
if (averageBandwidth < lowestAverageBandwidth) {
bestCodecs = codecs;
lowestAverageBandwidth = averageBandwidth;
}
});
goog.asserts.assert(bestCodecs != null, 'Should have chosen codecs!');
goog.asserts.assert(!isNaN(lowestAverageBandwidth),
'Bandwidth should be a number!');
// Filter out any variants that don't match, forcing AbrManager to choose from
// the most efficient variants possible.
this.manifest_.periods.forEach(function(period) {
period.variants = period.variants.filter(function(variant) {
var codecs = variantCodecs(variant);
if (codecs == bestCodecs) return true;
shaka.log.debug('Dropping Variant (better codec available)', variant);
return false;
});
});
};
/**
* Creates a new instance of DrmEngine. This can be replaced by tests to
* create fake instances instead.
*
* @return {!shaka.media.DrmEngine}
*/
shaka.Player.prototype.createDrmEngine = function() {
goog.asserts.assert(this.networkingEngine_, 'Must not be destroyed');
return new shaka.media.DrmEngine(
this.networkingEngine_,
this.onError_.bind(this),
this.onKeyStatus_.bind(this),
this.onExpirationUpdated_.bind(this));
};
/**
* Creates a new instance of NetworkingEngine. This can be replaced by tests
* to create fake instances instead.
*
* @return {!shaka.net.NetworkingEngine}
*/
shaka.Player.prototype.createNetworkingEngine = function() {
return new shaka.net.NetworkingEngine(this.onSegmentDownloaded_.bind(this));
};
/**
* Creates a new instance of Playhead. This can be replaced by tests to create
* fake instances instead.
*
* @param {number=} opt_startTime
* @return {!shaka.media.Playhead}
*/
shaka.Player.prototype.createPlayhead = function(opt_startTime) {
goog.asserts.assert(this.manifest_, 'Must have manifest');
return new shaka.media.Playhead(
this.video_, this.manifest_, this.config_.streaming,
opt_startTime || null, this.onSeek_.bind(this), this.onEvent_.bind(this));
};
/**
* Creates a new instance of PlayheadOvserver. This can be replaced by tests to
* create fake instances instead.
*
* @return {!shaka.media.PlayheadObserver}
*/
shaka.Player.prototype.createPlayheadObserver = function() {
goog.asserts.assert(this.manifest_, 'Must have manifest');
return new shaka.media.PlayheadObserver(
this.video_, this.mediaSource_, this.manifest_, this.config_.streaming,
this.onBuffering_.bind(this), this.onEvent_.bind(this),
this.onChangePeriod_.bind(this));
};
/**
* Create and open MediaSource. Potentially slow.
*
* @return {!Promise}
*/
shaka.Player.prototype.createMediaSource = function() {
this.mediaSource_ = new MediaSource();
var ret = new shaka.util.PublicPromise();
this.eventManager_.listen(this.mediaSource_, 'sourceopen', ret.resolve);
this.video_.src = window.URL.createObjectURL(this.mediaSource_);
return ret;
};
/**
* Creates a new instance of MediaSourceEngine. This can be replaced by tests
* to create fake instances instead.
*
* @return {!shaka.media.MediaSourceEngine}
*/
shaka.Player.prototype.createMediaSourceEngine = function() {
return new shaka.media.MediaSourceEngine(
this.video_, this.mediaSource_, this.textDisplayer_);
};
/**
* Creates a new instance of StreamingEngine. This can be replaced by tests
* to create fake instances instead.
*
* @return {!shaka.media.StreamingEngine}
*/
shaka.Player.prototype.createStreamingEngine = function() {
goog.asserts.assert(
this.playhead_ && this.playheadObserver_ && this.mediaSourceEngine_ &&
this.manifest_,
'Must not be destroyed');
var playerInterface = {
playhead: this.playhead_,
mediaSourceEngine: this.mediaSourceEngine_,
netEngine: this.networkingEngine_,
onChooseStreams: this.onChooseStreams_.bind(this),
onCanSwitch: this.canSwitch_.bind(this),
onError: this.onError_.bind(this),
onEvent: this.onEvent_.bind(this),
onManifestUpdate: this.onManifestUpdate_.bind(this),
onSegmentAppended: this.onSegmentAppended_.bind(this),
filterNewPeriod: this.filterNewPeriod_.bind(this),
filterAllPeriods: this.filterAllPeriods_.bind(this)
};
return new shaka.media.StreamingEngine(this.manifest_, playerInterface);
};
/**
* Configure the Player instance.
*
* The config object passed in need not be complete. It will be merged with
* the existing Player configuration.
*
* Config keys and types will be checked. If any problems with the config
* object are found, errors will be reported through logs.
*
* @param {!Object} config This should follow the form of
* {@link shakaExtern.PlayerConfiguration}, but you may omit any field you do
* not wish to change.
* @export
*/
shaka.Player.prototype.configure = function(config) {
goog.asserts.assert(this.config_, 'Config must not be null!');
// Backward compatibility for AbrManager injection. To be removed in v2.3.
if (config['abr'] && config['abr']['manager']) {
shaka.log.warning('AbrManager configuration has changed. ' +
'Please use abrFactory instead of abr.manager. ' +
'The old API will be removed in v2.3.');
var managerInstance = config['abr']['manager'];
var backwardCompatibilityFactory = function() {
return managerInstance;
};
delete config['abr']['manager'];
config['abrFactory'] = backwardCompatibilityFactory;
}
// Backward compatibility for streaming config. To be removed in v2.3.
if (config['streaming'] &&
config['streaming']['infiniteRetriesForLiveStreams'] != null) {
shaka.log.warning('Streaming configuration has changed. ' +
'Please use streaming.failureCallback instead of ' +
'streaming.infiniteRetriesForLiveStreams. ' +
'The old API will be removed in v2.3.');
this.infiniteRetriesForLiveStreams_ =
!!config['streaming']['infiniteRetriesForLiveStreams'];
delete config['streaming']['infiniteRetriesForLiveStreams'];
}
shaka.util.ConfigUtils.mergeConfigObjects(
this.config_, config, this.defaultConfig_(), this.configOverrides_(), '');
this.applyConfig_();
};
/**
* Apply config changes.
* @private
*/
shaka.Player.prototype.applyConfig_ = function() {
if (this.parser_) {
this.parser_.configure(this.config_.manifest);
}
if (this.drmEngine_) {
this.drmEngine_.configure(this.config_.drm);
}
if (this.streamingEngine_) {
this.streamingEngine_.configure(this.config_.streaming);
// Need to apply the restrictions to every period.
try {
// this.filterNewPeriod_() may throw.
this.manifest_.periods.forEach(this.filterNewPeriod_.bind(this));
} catch (error) {
this.onError_(error);
}
// May need to choose new streams.
shaka.log.debug('Choosing new streams after changing configuration');
var period = this.streamingEngine_.getCurrentPeriod();
this.chooseStreamsAndSwitch_(period);
}
if (this.abrManager_) {
this.configureAbrManager_();
// Simply enable/disable ABR with each call, since multiple calls to these
// methods have no effect.
if (this.config_.abr.enabled && !this.switchingPeriods_) {
this.abrManager_.enable();
} else {
this.abrManager_.disable();
}
}
};
/**
* Backward compatibility for AbrManager configuration. To be removed in v2.3.
* @private
*/
shaka.Player.prototype.configureAbrManager_ = function() {
if (this.abrManager_.configure) {
this.abrManager_.configure(this.config_.abr);
} else {
shaka.log.warning('AbrManager API has changed. ' +
'AbrManager.setDefaultEstimate() and ' +
'AbrManager.setRestrictions() are deprecated. ' +
'AbrManager.configure() is used instead. ' +
'Please upgrade to the new API. ' +
'The old API will be removed in v2.3.');
this.abrManager_['setDefaultEstimate'](
this.config_.abr.defaultBandwidthEstimate);
this.abrManager_['setRestrictions'](this.config_.abr.restrictions);
}
};
/**
* Return a copy of the current configuration. Modifications of the returned
* value will not affect the Player's active configuration. You must call
* player.configure() to make changes.
*
* @return {shakaExtern.PlayerConfiguration}