mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
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244 lines
8.9 KiB
JavaScript
244 lines
8.9 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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var TIMEOUT_LENGTH = 10000;
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/**
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* This class manages playback of a HTMLMediaElement with a MediaStream.
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* When constructed by a caller, an object instance is created with
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* a media element and a media stream object.
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*
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* @param {HTMLMediaElement} mediaElement the media element for playback
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* @param {MediaStream} mediaStream the media stream used in
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* the mediaElement for playback
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*/
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function MediaStreamPlayback(mediaElement, mediaStream) {
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this.mediaElement = mediaElement;
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this.mediaStream = mediaStream;
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}
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MediaStreamPlayback.prototype = {
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/**
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* Starts media with a media stream, runs it until a canplaythrough and
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* timeupdate event fires, and stops the media.
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*
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* @param {Boolean} isResume specifies if this media element is being resumed
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* from a previous run
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* @param {Function} onSuccess the success callback if the media playback
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* start and stop cycle completes successfully
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* @param {Function} onError the error callback if the media playback
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* start and stop cycle fails
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*/
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playMedia : function MSP_playMedia(isResume, onSuccess, onError) {
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var self = this;
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this.startMedia(isResume, function() {
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self.stopMediaElement();
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onSuccess();
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}, onError);
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},
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/**
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* Starts the media with the associated stream.
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*
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* @param {Boolean} isResume specifies if the media element playback
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* is being resumed from a previous run
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* @param {Function} onSuccess the success function call back
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* if media starts correctly
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* @param {Function} onError the error function call back
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* if media fails to start
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*/
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startMedia : function MSP_startMedia(isResume, onSuccess, onError) {
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var self = this;
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var canPlayThroughFired = false;
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// If we're initially running this media, check that the time is zero
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if (!isResume) {
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is(this.mediaStream.currentTime, 0,
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"Before starting the media element, currentTime = 0");
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}
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/**
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* Callback fired when the canplaythrough event is fired. We only
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* run the logic of this function once, as this event can fire
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* multiple times while a HTMLMediaStream is playing content from
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* a real-time MediaStream.
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*/
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var canPlayThroughCallback = function() {
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// Disable the canplaythrough event listener to prevent multiple calls
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canPlayThroughFired = true;
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self.mediaElement.removeEventListener('canplaythrough',
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canPlayThroughCallback, false);
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is(self.mediaElement.paused, false,
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"Media element should be playing");
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is(self.mediaElement.duration, Number.POSITIVE_INFINITY,
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"Duration should be infinity");
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// When the media element is playing with a real-time stream, we
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// constantly switch between having data to play vs. queuing up data,
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// so we can only check that the ready state is one of those two values
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ok(self.mediaElement.readyState === HTMLMediaElement.HAVE_ENOUGH_DATA ||
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self.mediaElement.readyState === HTMLMediaElement.HAVE_CURRENT_DATA,
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"Ready state shall be HAVE_ENOUGH_DATA or HAVE_CURRENT_DATA");
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is(self.mediaElement.seekable.length, 0,
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"Seekable length shall be zero");
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is(self.mediaElement.buffered.length, 0,
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"Buffered length shall be zero");
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is(self.mediaElement.seeking, false,
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"MediaElement is not seekable with MediaStream");
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ok(isNaN(self.mediaElement.startOffsetTime),
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"Start offset time shall not be a number");
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is(self.mediaElement.loop, false, "Loop shall be false");
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is(self.mediaElement.preload, "", "Preload should not exist");
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is(self.mediaElement.src, "", "No src should be defined");
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is(self.mediaElement.currentSrc, "",
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"Current src should still be an empty string");
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var timeUpdateFired = false;
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var timeUpdateCallback = function() {
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if (self.mediaStream.currentTime > 0 &&
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self.mediaElement.currentTime > 0) {
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timeUpdateFired = true;
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self.mediaElement.removeEventListener('timeupdate',
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timeUpdateCallback, false);
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onSuccess();
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}
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};
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// When timeupdate fires, we validate time has passed and move
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// onto the success condition
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self.mediaElement.addEventListener('timeupdate', timeUpdateCallback,
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false);
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// If timeupdate doesn't fire in enough time, we fail the test
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setTimeout(function() {
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if (!timeUpdateFired) {
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self.mediaElement.removeEventListener('timeupdate',
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timeUpdateCallback, false);
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onError("timeUpdate event never fired");
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}
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}, TIMEOUT_LENGTH);
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};
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// Adds a listener intended to be fired when playback is available
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// without further buffering.
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this.mediaElement.addEventListener('canplaythrough', canPlayThroughCallback,
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false);
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// Hooks up the media stream to the media element and starts playing it
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this.mediaElement.mozSrcObject = this.mediaStream;
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this.mediaElement.play();
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// If canplaythrough doesn't fire in enough time, we fail the test
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setTimeout(function() {
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if (!canPlayThroughFired) {
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self.mediaElement.removeEventListener('canplaythrough',
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canPlayThroughCallback, false);
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onError("canplaythrough event never fired");
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}
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}, TIMEOUT_LENGTH);
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},
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/**
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* Stops the media with the associated stream.
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*
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* Precondition: The media stream and element should both be actively
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* being played.
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*/
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stopMediaElement : function MSP_stopMediaElement() {
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this.mediaElement.pause();
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this.mediaElement.mozSrcObject = null;
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}
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}
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/**
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* This class is basically the same as MediaStreamPlayback except
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* ensures that the instance provided startMedia is a MediaStream.
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*
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* @param {HTMLMediaElement} mediaElement the media element for playback
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* @param {LocalMediaStream} mediaStream the media stream used in
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* the mediaElement for playback
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*/
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function LocalMediaStreamPlayback(mediaElement, mediaStream) {
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ok(mediaStream instanceof LocalMediaStream,
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"Stream should be a LocalMediaStream");
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MediaStreamPlayback.call(this, mediaElement, mediaStream);
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}
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LocalMediaStreamPlayback.prototype = Object.create(MediaStreamPlayback.prototype, {
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/**
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* Starts media with a media stream, runs it until a canplaythrough and
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* timeupdate event fires, and calls stop() on the stream.
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*
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* @param {Boolean} isResume specifies if this media element is being resumed
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* from a previous run
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* @param {Function} onSuccess the success callback if the media element
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* successfully fires ended on a stop() call
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* on the stream
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* @param {Function} onError the error callback if the media element fails
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* to fire an ended callback on a stop() call
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* on the stream
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*/
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playMediaWithStreamStop : {
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value: function (isResume, onSuccess, onError) {
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var self = this;
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this.startMedia(isResume, function() {
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self.stopStreamInMediaPlayback(function() {
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self.stopMediaElement();
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onSuccess();
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}, onError);
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}, onError);
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}
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},
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/**
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* Stops the local media stream while it's currently in playback in
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* a media element.
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*
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* Precondition: The media stream and element should both be actively
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* being played.
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*
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* @param {Function} onSuccess the success callback if the media element
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* fires an ended event from stop() being called
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* @param {Function} onError the error callback if the media element
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* fails to fire an ended event from stop() being
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* called
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*/
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stopStreamInMediaPlayback : {
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value: function (onSuccess, onError) {
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var endedFired = false;
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var self = this;
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/**
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* Callback fired when the ended event fires when stop() is called on the
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* stream.
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*/
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var endedCallback = function() {
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endedFired = true;
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self.mediaElement.removeEventListener('ended', endedCallback, false);
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ok(true, "ended event successfully fired");
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onSuccess();
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};
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this.mediaElement.addEventListener('ended', endedCallback, false);
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this.mediaStream.stop();
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// If ended doesn't fire in enough time, then we fail the test
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setTimeout(function() {
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if (!endedFired) {
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onError("ended event never fired");
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}
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}, TIMEOUT_LENGTH);
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}
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}
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});
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