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 }; 71
