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59 lines
1.6 KiB
HTML
59 lines
1.6 KiB
HTML
<!DOCTYPE HTML>
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<html>
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<head>
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<title>Test GainNode</title>
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<script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
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<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
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</head>
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<body>
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<pre id="test">
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<script class="testbody" type="text/javascript">
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SimpleTest.waitForExplicitFinish();
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addLoadEvent(function() {
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SpecialPowers.setBoolPref("media.webaudio.enabled", true);
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var context = new AudioContext();
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var buffer = context.createBuffer(1, 2048, 44100);
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for (var i = 0; i < 2048; ++i) {
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buffer.getChannelData(0)[i] = Math.sin(440 * 2 * Math.PI * i / 44100);
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}
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var destination = context.destination;
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var source = context.createBufferSource();
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var gain = context.createGain();
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source.buffer = buffer;
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source.connect(gain);
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gain.connect(destination);
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ok(gain.gain, "The audioparam member must exist");
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is(gain.gain.value, 1.0, "Correct initial value");
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is(gain.gain.defaultValue, 1.0, "Correct default value");
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is(gain.gain.minValue, 0, "Correct min value");
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is(gain.gain.maxValue, 1.0, "Correct max value");
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gain.gain.value = 0.5;
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is(gain.gain.value, 0.5, "Correct initial value");
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is(gain.gain.defaultValue, 1.0, "Correct default value");
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is(gain.gain.minValue, 0, "Correct min value");
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is(gain.gain.maxValue, 1.0, "Correct max value");
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source.start(0);
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SimpleTest.executeSoon(function() {
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source.stop(0);
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source.disconnect();
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gain.disconnect();
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SpecialPowers.clearUserPref("media.webaudio.enabled");
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SimpleTest.finish();
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});
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});
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</script>
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</pre>
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</body>
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</html>
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