test_mediaStreamAudioDestinationNode.html

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<!DOCTYPE HTML>

<html>

<head>

  <title>Test MediaStreamAudioDestinationNode</title>

  <script src="/tests/SimpleTest/SimpleTest.js"></script>

  <script type="text/javascript" src="webaudio.js"></script>

  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />

</head>

<body>

<pre id="test">

<audio id="audioelem"></audio>

<script class="testbody" type="text/javascript">

SimpleTest.waitForExplicitFinish();

SimpleTest.requestFlakyTimeout("This test uses a live media element so it needs to wait for the media stack to do some work.");

addLoadEvent(function() {

  var context = new AudioContext();

  var buffer = context.createBuffer(1, 2048, context.sampleRate);

  for (var i = 0; i < 2048; ++i) {

    buffer.getChannelData(0)[i] = Math.sin(440 * 2 * Math.PI * i / context.sampleRate);

  var source = context.createBufferSource();

  source.buffer = buffer;

  var dest = new MediaStreamAudioDestinationNode(context);

  source.connect(dest);

  var elem = document.getElementById('audioelem');

  elem.srcObject = dest.stream;

  elem.onloadedmetadata = function() {

    ok(true, "got metadata event");

    setTimeout(function() {

      is(elem.played.length, 1, "should have a played interval");

      is(elem.played.start(0), 0, "should have played immediately");

      isnot(elem.played.end(0), 0, "should have played for a non-zero interval");

      // This will end the media element.

      dest.stream.getTracks()[0].stop();

    }, 2000);

};

  elem.onended = function() {

    ok(true, "media element ended after destination track.stop()");

    SimpleTest.finish();

};

  source.start(0);

  elem.play();

});

</script>