<!DOCTYPE HTML>
<html>
<head>
  <title>Test AnalyserNode when the input is scaled </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">

SimpleTest.waitForExplicitFinish();
addLoadEvent(function() {

  var context = new AudioContext();

  var gain = context.createGain();
  var analyser = context.createAnalyser();
  var osc = context.createOscillator();


  osc.connect(gain);
  gain.connect(analyser);

  osc.start();

  var array = new Uint8Array(analyser.frequencyBinCount);

  function getAnalyserData() {
    gain.gain.setValueAtTime(currentGain, context.currentTime);
    analyser.getByteTimeDomainData(array);
    var inrange = true;
    var max = -1;
    for (var i = 0; i < array.length; i++) {
      if (array[i] > max) {
        max = Math.abs(array[i] - 128);
      }
    }
    if (max <= currentGain * 128) {
      ok(true, "Analyser got scaled data for " + currentGain);
      currentGain = tests.shift();
      if (currentGain == undefined) {
        SimpleTest.finish();
        return;
      }
    }
    requestAnimationFrame(getAnalyserData);
  }

  var tests = [1.0, 0.5, 0.0];
  var currentGain = tests.shift();
  requestAnimationFrame(getAnalyserData);
});

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