test_bug1118372.html

Enable keyboard shortcuts

<!DOCTYPE HTML>

<html>

<head>

  <title>Test WaveShaperNode with no curve</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 OfflineAudioContext(1, 2048, 44100);

  var osc=context.createOscillator();

  var gain=context.createGain();

  var shaper=context.createWaveShaper();

  gain.gain.value=0.1;

  shaper.curve=new Float32Array([-0.5,-0.5,1,1]);

  osc.connect(gain);

  gain.connect(shaper);

  shaper.connect(context.destination);

  osc.start(0);

  context.startRendering().then(function(buffer) {

    var samples = buffer.getChannelData(0);

    // the signal should be scaled

    var failures = 0;

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

      if (samples[i] > 0.5) {

        failures = failures + 1;

    ok(failures == 0, "signal should have been rescaled by gain: found " + failures + " points too loud.");

    SimpleTest.finish();

});

});

</script>

</pre>

</body>

</html>