content/test/data/media/media_source_utils.js

   1 // Copyright (c) 2013 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 function loadMediaFromURL(video) {
   6   installTitleEventHandler(video, 'error');
   7   video.addEventListener('playing', function(event) {
   8     console.log('Video Playing.');
   9   });
  10   var source = loadMediaSource(QueryString.mediafile, QueryString.mediatype);
  11   video.src = window.URL.createObjectURL(source);
  12 }
  13
  14 function loadMediaSource(mediaFiles, mediaTypes, appendSourceCallbackFn) {
  15   mediaFiles = convertToArray(mediaFiles);
  16   mediaTypes = convertToArray(mediaTypes);
  17
  18   if (!mediaFiles || !mediaTypes)
  19     failTest('Missing parameters in loadMediaSource().');
  20
  21   var totalAppended = 0;
  22   function onSourceOpen(e) {
  23     console.log('onSourceOpen', e);
  24     // We can load multiple media files using the same media type. However, if
  25     // more than one media type is used, we expect to have a media type entry
  26     // for each corresponding media file.
  27     var srcBuffer = null;
  28     for (var i = 0; i < mediaFiles.length; i++) {
  29       if (i == 0 || mediaFiles.length == mediaTypes.length) {
  30         console.log('Creating a source buffer for type ' + mediaTypes[i]);
  31         try {
  32           srcBuffer = mediaSource.addSourceBuffer(mediaTypes[i]);
  33         } catch (e) {
  34           failTest('Exception adding source buffer: ' + e.message);
  35           return;
  36         }
  37       }
  38       doAppend(mediaFiles[i], srcBuffer);
  39     }
  40   }
  41
  42   function doAppend(mediaFile, srcBuffer) {
  43     var xhr = new XMLHttpRequest();
  44     xhr.open('GET', mediaFile);
  45     xhr.responseType = 'arraybuffer';
  46     xhr.addEventListener('load', function(e) {
  47       var onUpdateEnd = function(e) {
  48         console.log('End of appending buffer from ' + mediaFile);
  49         srcBuffer.removeEventListener('updateend', onUpdateEnd);
  50         totalAppended++;
  51         if (totalAppended == mediaFiles.length) {
  52           if (appendSourceCallbackFn)
  53             appendSourceCallbackFn(mediaSource);
  54           else
  55             mediaSource.endOfStream();
  56         }
  57       };
  58       srcBuffer.addEventListener('updateend', onUpdateEnd);
  59       srcBuffer.appendBuffer(new Uint8Array(e.target.response));
  60     });
  61     xhr.send();
  62   }
  63
  64   var mediaSource = new MediaSource();
  65   mediaSource.addEventListener('sourceopen', onSourceOpen);
  66   return mediaSource;
  67 }