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71 lines
2.2 KiB
HTML
71 lines
2.2 KiB
HTML
<!DOCTYPE HTML>
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<html>
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<head>
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<title>Test DynamicsCompressorNode</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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function near(a, b, msg) {
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ok(Math.abs(a - b) < 1e-4, msg);
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}
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SimpleTest.waitForExplicitFinish();
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addLoadEvent(function() {
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var context = new AudioContext();
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var osc = context.createOscillator();
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var sp = context.createScriptProcessor();
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var compressor = context.createDynamicsCompressor();
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osc.connect(compressor);
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osc.connect(sp);
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compressor.connect(context.destination);
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is(compressor.channelCount, 2, "compressor node has 2 input channels by default");
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is(compressor.channelCountMode, "explicit", "Correct channelCountMode for the compressor node");
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is(compressor.channelInterpretation, "speakers", "Correct channelCountInterpretation for the compressor node");
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// Verify default values
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with (compressor) {
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ok(threshold instanceof AudioParam, "treshold is an AudioParam");
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near(threshold.defaultValue, -24, "Correct default value for threshold");
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ok(knee instanceof AudioParam, "knee is an AudioParam");
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near(knee.defaultValue, 30, "Correct default value for knee");
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ok(ratio instanceof AudioParam, "knee is an AudioParam");
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near(ratio.defaultValue, 12, "Correct default value for ratio");
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is(typeof reduction, "number", "reduction is a number");
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near(reduction, 0, "Correct default value for reduction");
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ok(attack instanceof AudioParam, "attack is an AudioParam");
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near(attack.defaultValue, 0.003, "Correct default value for attack");
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ok(release instanceof AudioParam, "release is an AudioParam");
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near(release.defaultValue, 0.25, "Correct default value for release");
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}
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compressor.threshold.value = -80;
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osc.start();
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var iteration = 0;
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sp.onaudioprocess = function(e) {
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if (iteration > 10) {
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ok(compressor.reduction < 0,
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"Feeding a full-scale sine to a compressor should result in an db" +
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"reduction.");
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sp.onaudioprocess = null;
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osc.stop(0);
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SimpleTest.finish();
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}
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iteration++;
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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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