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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 // MediaSourceUtils provides basic functionality to load content using MSE API. | |
| 6 var MediaSourceUtils = new function() { | |
| 7 } | |
| 8 | |
| 9 MediaSourceUtils.loadMediaSourceFromTestConfig = function(testConfig, | |
| 10 appendCallbackFn) { | |
| 11 return this.loadMediaSource(testConfig.mediaFile, | |
| 12 testConfig.mediaType, | |
| 13 appendCallbackFn); | |
| 14 }; | |
| 15 | |
| 16 MediaSourceUtils.loadMediaSource = function(mediaFiles, | |
| 17 mediaTypes, | |
| 18 appendCallbackFn) { | |
| 19 if (!mediaFiles || !mediaTypes) | |
| 20 Utils.failTest('Missing parameters in loadMediaSource().'); | |
| 21 | |
| 22 var mediaFiles = Utils.convertToArray(mediaFiles); | |
| 23 var mediaTypes = Utils.convertToArray(mediaTypes); | |
| 24 var totalAppended = 0; | |
| 25 function onSourceOpen(e) { | |
| 26 Utils.timeLog('onSourceOpen', e); | |
| 27 // We can load multiple media files using the same media type. However, if | |
| 28 // more than one media type is used, we expect to have a media type entry | |
| 29 // for each corresponding media file. | |
| 30 var srcBuffer = null; | |
| 31 for (var i = 0; i < mediaFiles.length; i++) { | |
| 32 if (i == 0 || mediaFiles.length == mediaTypes.length) { | |
| 33 Utils.timeLog('Creating a source buffer for type ' + mediaTypes[i]); | |
| 34 try { | |
| 35 srcBuffer = mediaSource.addSourceBuffer(mediaTypes[i]); | |
| 36 } catch (e) { | |
| 37 Utils.failTest('Exception adding source buffer: ' + e.message); | |
| 38 return; | |
| 39 } | |
| 40 } | |
| 41 doAppend(mediaFiles[i], srcBuffer); | |
| 42 } | |
| 43 } | |
| 44 | |
| 45 function doAppend(mediaFile, srcBuffer) { | |
| 46 var xhr = new XMLHttpRequest(); | |
| 47 xhr.open('GET', mediaFile); | |
| 48 xhr.responseType = 'arraybuffer'; | |
| 49 xhr.addEventListener('load', function(e) { | |
| 50 var onUpdateEnd = function(e) { | |
| 51 Utils.timeLog('End of appending buffer from ' + mediaFile); | |
| 52 srcBuffer.removeEventListener('updateend', onUpdateEnd); | |
| 53 totalAppended++; | |
| 54 if (totalAppended == mediaFiles.length) { | |
| 55 if (appendCallbackFn) | |
| 56 appendCallbackFn(mediaSource); | |
| 57 else | |
| 58 mediaSource.endOfStream(); | |
| 59 } | |
| 60 }; | |
| 61 srcBuffer.addEventListener('updateend', onUpdateEnd); | |
| 62 srcBuffer.appendBuffer(new Uint8Array(e.target.response)); | |
| 63 }); | |
| 64 xhr.send(); | |
| 65 } | |
| 66 | |
| 67 var mediaSource = new MediaSource(); | |
| 68 mediaSource.addEventListener('sourceopen', onSourceOpen); | |
| 69 return mediaSource; | |
| 70 }; | |
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