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<!DOCTYPE HTML>
<html>
<head>
<title>Test OscillatorNode lifetime and sine phase</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
</head>
<body>
<pre id="test">
<script src="webaudio.js" type="text/javascript"></script>
<script class="testbody" type="text/javascript">
const signalLength = 2048;
function createOscillator(context) {
var osc = context.createOscillator();
osc.start(0);
osc.stop(signalLength/context.sampleRate);
return osc;
}
function connectUnreferencedOscillator(context, destination) {
var osc = createOscillator(context);
osc.connect(destination);
}
var gTest = {
length: signalLength,
numberOfChannels: 1,
createGraph(context) {
var blend = context.createGain();
connectUnreferencedOscillator(context, blend);
// Test that the unreferenced oscillator remains alive until it has finished.
SpecialPowers.forceGC();
SpecialPowers.forceCC();
// Create another sine wave oscillator in negative time, which should
// cancel when mixed with the unreferenced oscillator.
var oscillator = createOscillator(context);
oscillator.frequency.value = -440;
oscillator.connect(blend);
return blend;
},
};
runTest();
</script>
</pre>
</body>
</html>
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