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import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

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Roy Tam 2018-01-19 03:59:58 +08:00
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dom/media/webaudio/test/test_convolverNodeChannelCount.html Normal file
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<!DOCTYPE HTML>
<html>
<head>
<title>Test ConvolverNode channel count</title>
<script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
</head>
<body>
<pre id="test">
<script src="webaudio.js" type="text/javascript"></script>
<script class="testbody" type="text/javascript">
const signalLength = 2048;
const responseLength = 1000;
const outputLength = 2048; // < signalLength + responseLength to test bug 910171
var gTest = {
length: outputLength,
numberOfChannels: 2,
createGraph: function(context) {
var buffer = context.createBuffer(2, signalLength, context.sampleRate);
for (var i = 0; i < signalLength; ++i) {
var sample = Math.sin(440 * 2 * Math.PI * i / context.sampleRate);
// When mixed into a single channel, this produces silence
buffer.getChannelData(0)[i] = sample;
buffer.getChannelData(1)[i] = -sample;
}
var response = context.createBuffer(2, responseLength, context.sampleRate);
for (var i = 0; i < responseLength; ++i) {
response.getChannelData(0)[i] = i / responseLength;
response.getChannelData(1)[i] = 1 - (i / responseLength);
}
var convolver = context.createConvolver();
convolver.buffer = response;
convolver.channelCount = 1;
expectException(function() { convolver.channelCount = 3; },
DOMException.NOT_SUPPORTED_ERR);
convolver.channelCountMode = "explicit";
expectException(function() { convolver.channelCountMode = "max"; },
DOMException.NOT_SUPPORTED_ERR);
convolver.channelInterpretation = "discrete";
convolver.channelInterpretation = "speakers";
var source = context.createBufferSource();
source.buffer = buffer;
source.connect(convolver);
source.start(0);
return convolver;
},
};
runTest();
</script>
</pre>
</body>
</html>