<!DOCTYPE HTML>
<html>
<head>
<title>Test WaveShaperNode with no curve</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">
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>