test_oscillatorNode2.html

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<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>