<!DOCTYPE HTML>
<html>
<head>
<title>Test AnalyserNode</title>
<script type="text/javascript" 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">
SimpleTest.waitForExplicitFinish();
addLoadEvent(function() {
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, 1, "analyser node has 1 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);
is(analyser.smoothingTimeConstant, 0.8, "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;
SimpleTest.finish();
});
</script>
</pre>
</body>
</html>