test_bug972678.html

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<head>

  <title>Test buffers do not interfere when scheduled in sequence</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">

var OFFSETS = [0.005, 0.01, 0.02, 0.03];

var LENGTH = 128;

var gTest = {

  length: 128 * OFFSETS.length,

  numberOfChannels: 1,

  createGraph(context) {

    var gain = context.createGain();

    // create a repeating sample

    var repeatingSample = context.createBuffer(1, 2, context.sampleRate);

    var c = repeatingSample.getChannelData(0);

    for (var i = 0; i < repeatingSample.length; ++i) {

      c[i] = i % 2 == 0 ? 1 : -1;

    OFFSETS.forEach(function (offset, offsetIdx) {

      // Schedule a set of nodes to repeat the sample.

      for (var i = 0; i < LENGTH; i += repeatingSample.length) {

        var source = context.createBufferSource();

        source.buffer = repeatingSample;

        source.connect(gain);

        source.start((offsetIdx * LENGTH + i + offset) / context.sampleRate);

      let buffer = context.createBuffer(1, LENGTH, context.sampleRate);

      c = buffer.getChannelData(0);

      for (var i = 0; i < buffer.length; ++i) {

        c[i] = i % 2 == 0 ? -1 : 1;

      var source = context.createBufferSource();

      source.buffer = buffer;

      source.connect(gain);

      source.start((offsetIdx * LENGTH + offset) / context.sampleRate);

});

    return gain;

},

  createExpectedBuffers(context) {

    return context.createBuffer(1, gTest.length, context.sampleRate);

},

};

runTest();

</script>

</pre>

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