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<!DOCTYPE HTML>
<html>
<head>
  <title>Test AudioParam.setValueCurveAtTime twice</title>
  <script type="text/javascript" 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 linearInterpolate(t0, v0, t1, v1, t)
{
  return v0 + (v1 - v0) * ((t - t0) / (t1 - t0));
}

var T0 = 0;

var gTest = {
  length: 2048,
  numberOfChannels: 1,
  createGraph: function(context) {
    var curve2 = new Float32Array(100);
    for (var i = 0; i < 100; ++i) {
      curve2[i] = Math.sin(220 * 6 * Math.PI * i / context.sampleRate);
    }

    var source = context.createConstantSource();

    var gain = context.createGain();
    gain.gain.setValueCurveAtTime(curve2, T0, this.duration/2);
    //Set a different curve from the first one
    gain.gain.setValueCurveAtTime(this.curve, T0, this.duration);

    source.connect(gain);

    source.start(0);
    return gain;
  },
  createExpectedBuffers: function(context) {
    this.duration = 1024 / context.sampleRate;
    this.curve = new Float32Array(100);
    for (var i = 0; i < 100; ++i) {
      this.curve[i] = Math.sin(440 * 2 * Math.PI * i / context.sampleRate);
    }
    var expectedBuffer = context.createBuffer(1, 2048, context.sampleRate);
    for (var i = 0; i < 2048; ++i) {
      step = 1024.0/99.0;
      var current = Math.floor(i / step);
      var next = current + 1;
      if (next < this.curve.length) {
        expectedBuffer.getChannelData(0)[i] = linearInterpolate(current*step, this.curve[current], next*step, this.curve[next], i);
      } else {
        expectedBuffer.getChannelData(0)[i] = this.curve[99];
      }
    }
    return expectedBuffer;
  },
};

runTest();

</script>
</pre>
</body>
</html>