test_offlineDestinationChannelCountMore.html

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<html>

<head>

  <title>Test OfflineAudioContext with a channel count less than the specified number</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">

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

SimpleTest.waitForExplicitFinish();

addLoadEvent(function() {

  var ctx = new OfflineAudioContext(6, 100, 22050);

  var buf = ctx.createBuffer(2, 100, ctx.sampleRate);

  for (var i = 0; i < 2; ++i) {

    for (var j = 0; j < 100; ++j) {

      buf.getChannelData(i)[j] = Math.sin(2 * Math.PI * 200 * j / ctx.sampleRate);

  var emptyBuffer = ctx.createBuffer(1, 100, ctx.sampleRate);

  var src = ctx.createBufferSource();

  src.buffer = buf;

  src.start(0);

  src.connect(ctx.destination);

  ctx.destination.channelCountMode = "max";

  ctx.startRendering();

  ctx.oncomplete = function(e) {

    is(e.renderedBuffer.numberOfChannels, 6, "Correct expected number of buffers");

    compareChannels(e.renderedBuffer.getChannelData(0), buf.getChannelData(0));

    compareChannels(e.renderedBuffer.getChannelData(1), buf.getChannelData(1));

    for (var i = 2; i < 6; ++i) {

      compareChannels(e.renderedBuffer.getChannelData(i), emptyBuffer.getChannelData(0));

    SimpleTest.finish();

};

});

</script>

</pre>

</body>

</html>