<!DOCTYPE HTML>
<html>
<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);
      }

      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>
</body>
</html>
