third_party/WebKit/LayoutTests/media/audio-concurrent-supported.html

   1 <html>
   2     <title>Test of concurrent HTML5 audio</title>
   3     <body>
   4
   5     <p>Test that multiple audio elements can play concurrently.</p>
   6
   7     <script src=video-test.js></script>
   8     <script src=media-file.js></script>
   9     <script>
  10         var maxPlayers = 2; // Number of concurrent audio elements to test. For larger values a longer media file is needed.
  11         var audioElementCount = 0;
  12
  13         function errorListener(event)
  14         {
  15              logResult(false, "Element " + audioElementCount + " caught 'error' event, audio.error.code = " + this.error.code);
  16              endTest();
  17         }
  18
  19         function canplaythroughListener(event)
  20         {
  21              consoleWrite("EVENT(" + audioElementCount + ", canplaythrough)");
  22              testElement = this;
  23              testExpected(audioElementCount + ", testElement.currentTime", 0);
  24              this.play();
  25         }
  26
  27         function playingListener(event)
  28         {
  29              consoleWrite("EVENT(" + audioElementCount + ", playing)");
  30         }
  31
  32         function timeupdateListener(event)
  33         {
  34             testElement = this;
  35             testExpected(audioElementCount + ", testElement.currentTime", 0, '>');
  36             this.removeEventListener('timeupdate', timeupdateListener);
  37             if (++audioElementCount >= maxPlayers) {
  38                 // All audio elements have been started playing. Make sure
  39                 // all of them are still playing.
  40                 consoleWrite("Making sure all " + maxPlayers + " audio elements are in playing state:");
  41                 for (var i = 0; i < maxPlayers; i++) {
  42                     testElement = document.getElementsByTagName('audio')[i];
  43                     testExpected(i + ", testElement.paused", false);
  44                 }
  45                 endTest();
  46             } else {
  47                 // Start the next audio element
  48                 testAudioElement(audioElementCount);
  49             }
  50         }
  51
  52         function testAudioElement(count)
  53         {
  54             var audioElement = document.getElementsByTagName('audio')[count];
  55             audioElement.addEventListener('error', errorListener);
  56             audioElement.addEventListener('canplaythrough', canplaythroughListener);
  57             audioElement.addEventListener('timeupdate', timeupdateListener);
  58             audioElement.addEventListener('playing', playingListener);
  59             audioElement.src = findMediaFile("audio", "content/silence");
  60         }
  61
  62         consoleWrite("Starting a total of " + maxPlayers + " concurrent audio elements.");
  63         for (var i = 0; i < maxPlayers; i++)
  64             document.write("<audio controls></audio>");
  65
  66         testAudioElement(0);
  67     </script>
  68
  69     </body>
  70 </html>