test_mediaStreamTrackAudioSourceNode.html

Enable keyboard shortcuts

<!DOCTYPE HTML>

<html>

<meta charset="utf-8">

<head>

  <title>Test MediaStreamTrackAudioSourceNode processing is correct</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) {

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

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

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

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

  return buffer;

let gTest = {

  length: 2048,

  skipOfflineContextTests: true,

  createGraph(context) {

    let sourceGraph = new AudioContext();

    let source = sourceGraph.createBufferSource();

    source.buffer = createBuffer(context);

    let dest = sourceGraph.createMediaStreamDestination();

    source.connect(dest);

    // Extract first audio track from dest.stream

    let track = dest.stream.getAudioTracks()[0];

    source.start(0);

    let mediaStreamTrackSource = new MediaStreamTrackAudioSourceNode(context, { mediaStreamTrack: track });

    // channelCount and channelCountMode should have no effect

    mediaStreamTrackSource.channelCount = 1;

    mediaStreamTrackSource.channelCountMode = "explicit";

    return mediaStreamTrackSource;

},

  createExpectedBuffers(context) {

    return createBuffer(context);

},

};

runTest();

</script>

</pre>

</body>

</html>