test_mediaStreamAudioSourceNodePassThrough.html

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<!DOCTYPE HTML>

<html>

<meta charset="utf-8">

<head>

  <title>Test MediaStreamAudioSourceNode passthrough</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">

function createBuffer(context, delay) {

  var buffer = context.createBuffer(2, 2048, context.sampleRate);

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

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

    buffer.getChannelData(1)[i + delay] = -buffer.getChannelData(0)[i + delay];

  return buffer;

var gTest = {

  length: 2048,

  skipOfflineContextTests: true,

  createGraph(context) {

    var sourceGraph = new AudioContext();

    var source = sourceGraph.createBufferSource();

    source.buffer = createBuffer(context, 0);

    var dest = sourceGraph.createMediaStreamDestination();

    source.connect(dest);

    source.start(0);

    var mediaStreamSource = context.createMediaStreamSource(dest.stream);

    // channelCount and channelCountMode should have no effect

    mediaStreamSource.channelCount = 1;

    mediaStreamSource.channelCountMode = "explicit";

    var srcWrapped = SpecialPowers.wrap(mediaStreamSource);

    ok("passThrough" in srcWrapped, "MediaStreamAudioSourceNode should support the passThrough API");

    srcWrapped.passThrough = true;

    return mediaStreamSource;

},

  createExpectedBuffers(context) {

    return context.createBuffer(2, 2048, context.sampleRate);

},

};

runTest();

</script>

</pre>

</body>

</html>