content/media/test/test_framebuffer.html

   1 <!DOCTYPE HTML>
   2 <html>
   3 <!--
   4 https://bugzilla.mozilla.org/show_bug.cgi?id=490705
   5 -->
   6
   7 <head>
   8   <title>Media test: framebuffer size checks</title>
   9   <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
  10   <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
  11 </head>
  12 <body>
  13 <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=490705">Mozilla Bug 490705</a>
  14
  15 <!-- mute audio, since there is no need to hear the sound for these tests -->
  16 <audio id='a1' controls></audio>
  17
  18 <pre id="test">
  19 <script class="testbody" type="text/javascript">
  20 var testFile = "bug495794.ogg";
  21 var testFileDuration = 0.30;
  22 var testFileChannelCount = 6;
  23 var testFileSampleRate = 48000;
  24 var testFileFrameBufferLength = 6 * 1024;
  25
  26 var undef;
  27
  28 var currentSampleOffset = 0;
  29 var isTimePropertyValid = true;
  30
  31 function audioAvailable(event) {
  32   var buffer = event.frameBuffer;
  33
  34   if ( (typeof event.time !== "number") ||
  35       (Math.abs(event.time - currentSampleOffset / testFileSampleRate / testFileChannelCount) > 0.01) ) {
  36     isTimePropertyValid = false;
  37   }
  38
  39   currentSampleOffset += buffer.length;
  40 }
  41
  42 var loadedMetadataCalled = false;
  43 function loadedMetadata() {
  44   loadedMetadataCalled = true;
  45   var a1 = document.getElementById('a1');
  46   is(a1.mozChannels, testFileChannelCount, "mozChannels should be " + testFileChannelCount + ".");
  47   is(a1.mozSampleRate, testFileSampleRate, "mozSampleRate should be " + testFileSampleRate + ".");
  48   is(a1.mozFrameBufferLength, testFileFrameBufferLength, "default mozFrameBufferLength should be " + testFileFrameBufferLength + ".");
  49
  50   var minFailed = false;
  51   try {
  52     a1.mozFrameBufferLength = 4;
  53   } catch(e) {
  54     minFailed = true;
  55   }
  56   ok(minFailed, "mozFrameBufferLength min fail check");
  57
  58   var maxFailed = false;
  59   try {
  60     a1.mozFrameBufferLength = 44444;
  61   } catch(e) {
  62     maxFailed = true;
  63   }
  64   ok(maxFailed, "mozFrameBufferLength max fail check");
  65
  66   a1.mozFrameBufferLength = testFileFrameBufferLength;
  67 }
  68
  69 function checkResults() {
  70   ok(loadedMetadataCalled, "loadedmetadata event not dispatched.");
  71   ok(isTimePropertyValid, "The audioAvailable event's time attribute was invalid.");
  72
  73   var expectedOffset = Math.ceil(testFileDuration * testFileSampleRate * testFileChannelCount);
  74   if (expectedOffset % testFileFrameBufferLength !== 0) {
  75     expectedOffset += (testFileFrameBufferLength - (expectedOffset % testFileFrameBufferLength));
  76   }
  77   is(currentSampleOffset, expectedOffset, "Check amount of signal data processed");
  78
  79   SimpleTest.finish();
  80 }
  81
  82 function audioEnded() {
  83   checkResults();
  84 }
  85
  86 function initTest() {
  87   var a1 = document.getElementById('a1');
  88   a1.addEventListener("ended", audioEnded, false);
  89   a1.addEventListener("loadedmetadata", loadedMetadata, false);
  90   a1.addEventListener("MozAudioAvailable", audioAvailable, false);
  91   a1.src = testFile;
  92   a1.muted = true;
  93   a1.play();
  94 }
  95
  96 window.addEventListener("load", function(e) {
  97   initTest();
  98 }, false);
  99
 100 SimpleTest.waitForExplicitFinish();
 101
 102 </script>
 103 </pre>
 104 </body>
 105 </html>