2013-03-31 20:41:14 -07:00
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<!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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<script type="text/javascript" src="webaudio.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, context.sampleRate);
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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 / context.sampleRate);
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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 analyser = context.createAnalyser();
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source.buffer = buffer;
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source.connect(analyser);
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analyser.connect(destination);
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is(analyser.fftSize, 2048, "Correct default value for fftSize");
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is(analyser.frequencyBinCount, 1024, "Correct default value for frequencyBinCount");
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expectException(function() {
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analyser.fftSize = 0;
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}, DOMException.INDEX_SIZE_ERR);
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expectException(function() {
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analyser.fftSize = 1;
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}, DOMException.INDEX_SIZE_ERR);
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2013-04-08 18:26:08 -07:00
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expectException(function() {
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analyser.fftSize = 8;
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}, DOMException.INDEX_SIZE_ERR);
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2013-03-31 20:41:14 -07:00
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expectException(function() {
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analyser.fftSize = 100; // non-power of two
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}, DOMException.INDEX_SIZE_ERR);
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2013-04-08 18:26:08 -07:00
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expectException(function() {
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analyser.fftSize = 2049;
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}, DOMException.INDEX_SIZE_ERR);
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expectException(function() {
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analyser.fftSize = 4096;
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}, DOMException.INDEX_SIZE_ERR);
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2013-03-31 20:41:14 -07:00
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analyser.fftSize = 1024;
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is(analyser.frequencyBinCount, 512, "Correct new value for frequencyBinCount");
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is(analyser.minDecibels, -100, "Correct default value for minDecibels");
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is(analyser.maxDecibels, -30, "Correct default value for maxDecibels");
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expectException(function() {
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analyser.minDecibels = -30;
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}, DOMException.INDEX_SIZE_ERR);
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expectException(function() {
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analyser.minDecibels = -29;
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}, DOMException.INDEX_SIZE_ERR);
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expectException(function() {
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analyser.maxDecibels = -100;
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}, DOMException.INDEX_SIZE_ERR);
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expectException(function() {
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analyser.maxDecibels = -101;
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}, DOMException.INDEX_SIZE_ERR);
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is(analyser.smoothingTimeConstant, 0.8, "Correct default value for smoothingTimeConstant");
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expectException(function() {
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analyser.smoothingTimeConstant = -0.1;
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}, DOMException.INDEX_SIZE_ERR);
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expectException(function() {
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analyser.smoothingTimeConstant = 1.1;
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}, DOMException.INDEX_SIZE_ERR);
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analyser.smoothingTimeConstant = 0;
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analyser.smoothingTimeConstant = 1;
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SpecialPowers.clearUserPref("media.webaudio.enabled");
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SimpleTest.finish();
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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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