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<!DOCTYPE HTML>
<html>
<head>
<title>Test AnalyserNode</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<script type="text/javascript" src="webaudio.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
</head>
<body>
<pre id="test">
<script class="testbody" type="text/javascript">
function testNode() {
var context = new AudioContext();
var buffer = context.createBuffer(1, 2048, context.sampleRate);
for (var i = 0; i < 2048; ++i) {
buffer.getChannelData(0)[i] = Math.sin(440 * 2 * Math.PI * i / context.sampleRate);
}
var destination = context.destination;
var source = context.createBufferSource();
var analyser = context.createAnalyser();
source.buffer = buffer;
source.connect(analyser);
analyser.connect(destination);
is(analyser.channelCount, 2, "analyser node has 2 input channels by default");
is(analyser.channelCountMode, "max", "Correct channelCountMode for the analyser node");
is(analyser.channelInterpretation, "speakers", "Correct channelCountInterpretation for the analyser node");
is(analyser.fftSize, 2048, "Correct default value for fftSize");
is(analyser.frequencyBinCount, 1024, "Correct default value for frequencyBinCount");
expectException(function() {
analyser.fftSize = 0;
}, DOMException.INDEX_SIZE_ERR);
expectException(function() {
analyser.fftSize = 1;
}, DOMException.INDEX_SIZE_ERR);
expectException(function() {
analyser.fftSize = 8;
}, DOMException.INDEX_SIZE_ERR);
expectException(function() {
analyser.fftSize = 100; // non-power of two
}, DOMException.INDEX_SIZE_ERR);
expectException(function() {
analyser.fftSize = 2049;
}, DOMException.INDEX_SIZE_ERR);
expectException(function() {
analyser.fftSize = 4097;
}, DOMException.INDEX_SIZE_ERR);
expectException(function() {
analyser.fftSize = 8193;
}, DOMException.INDEX_SIZE_ERR);
expectException(function() {
analyser.fftSize = 16385;
}, DOMException.INDEX_SIZE_ERR);
expectException(function() {
analyser.fftSize = 32769;
}, DOMException.INDEX_SIZE_ERR);
expectException(function() {
analyser.fftSize = 65536;
}, DOMException.INDEX_SIZE_ERR);
analyser.fftSize = 1024;
is(analyser.frequencyBinCount, 512, "Correct new value for frequencyBinCount");
is(analyser.minDecibels, -100, "Correct default value for minDecibels");
is(analyser.maxDecibels, -30, "Correct default value for maxDecibels");
expectException(function() {
analyser.minDecibels = -30;
}, DOMException.INDEX_SIZE_ERR);
expectException(function() {
analyser.minDecibels = -29;
}, DOMException.INDEX_SIZE_ERR);
expectException(function() {
analyser.maxDecibels = -100;
}, DOMException.INDEX_SIZE_ERR);
expectException(function() {
analyser.maxDecibels = -101;
}, DOMException.INDEX_SIZE_ERR);
ok(Math.abs(analyser.smoothingTimeConstant - 0.8) < 0.001, "Correct default value for smoothingTimeConstant");
expectException(function() {
analyser.smoothingTimeConstant = -0.1;
}, DOMException.INDEX_SIZE_ERR);
expectException(function() {
analyser.smoothingTimeConstant = 1.1;
}, DOMException.INDEX_SIZE_ERR);
analyser.smoothingTimeConstant = 0;
analyser.smoothingTimeConstant = 1;
}
function testConstructor() {
var context = new AudioContext();
var analyser = new AnalyserNode(context);
is(analyser.channelCount, 2, "analyser node has 2 input channels by default");
is(analyser.channelCountMode, "max", "Correct channelCountMode for the analyser node");
is(analyser.channelInterpretation, "speakers", "Correct channelCountInterpretation for the analyser node");
is(analyser.fftSize, 2048, "Correct default value for fftSize");
is(analyser.frequencyBinCount, 1024, "Correct default value for frequencyBinCount");
is(analyser.minDecibels, -100, "Correct default value for minDecibels");
is(analyser.maxDecibels, -30, "Correct default value for maxDecibels");
ok(Math.abs(analyser.smoothingTimeConstant - 0.8) < 0.001, "Correct default value for smoothingTimeConstant");
expectException(function() {
analyser = new AnalyserNode(context, { fftSize: 0 });
}, DOMException.INDEX_SIZE_ERR);
expectException(function() {
analyser = new AnalyserNode(context, { fftSize: 1 });
}, DOMException.INDEX_SIZE_ERR);
expectException(function() {
analyser = new AnalyserNode(context, { fftSize: 8 });
}, DOMException.INDEX_SIZE_ERR);
expectException(function() {
analyser = new AnalyserNode(context, { fftSize: 100 }); // non-power of two
}, DOMException.INDEX_SIZE_ERR);
expectException(function() {
analyser = new AnalyserNode(context, { fftSize: 2049 });
}, DOMException.INDEX_SIZE_ERR);
expectException(function() {
analyser = new AnalyserNode(context, { fftSize: 4097 });
}, DOMException.INDEX_SIZE_ERR);
expectException(function() {
analyser = new AnalyserNode(context, { fftSize: 8193 });
}, DOMException.INDEX_SIZE_ERR);
expectException(function() {
analyser = new AnalyserNode(context, { fftSize: 16385 });
}, DOMException.INDEX_SIZE_ERR);
expectException(function() {
analyser = new AnalyserNode(context, { fftSize: 32769 });
}, DOMException.INDEX_SIZE_ERR);
expectException(function() {
analyser = new AnalyserNode(context, { fftSize: 65536 });
}, DOMException.INDEX_SIZE_ERR);
analyser = new AnalyserNode(context, { fftSize: 1024 });
is(analyser.frequencyBinCount, 512, "Correct new value for frequencyBinCount");
expectException(function() {
analyser = new AnalyserNode(context, { minDecibels: -30 });
}, DOMException.INDEX_SIZE_ERR);
expectException(function() {
analyser = new AnalyserNode(context, { minDecibels: -29 });
}, DOMException.INDEX_SIZE_ERR);
expectException(function() {
analyser = new AnalyserNode(context, { maxDecibels: -100 });
}, DOMException.INDEX_SIZE_ERR);
expectException(function() {
analyser = new AnalyserNode(context, { maxDecibels: -101 });
}, DOMException.INDEX_SIZE_ERR);
expectException(function() {
analyser = new AnalyserNode(context, { smoothingTimeConstant: -0.1 });
}, DOMException.INDEX_SIZE_ERR);
expectException(function() {
analyser = new AnalyserNode(context, { smoothingTimeConstant: -1.1 });
}, DOMException.INDEX_SIZE_ERR);
analyser = new AnalyserNode(context, { smoothingTimeConstant: 0 });
analyser = new AnalyserNode(context, { smoothingTimeConstant: 1 });
}
SimpleTest.waitForExplicitFinish();
addLoadEvent(function() {
testNode();
testConstructor();
SimpleTest.finish();
});
</script>
</pre>
</body>
</html>