1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/media/webaudio/test/test_convolverNodeChannelCount.html Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,61 @@
1.4 +<!DOCTYPE HTML>
1.5 +<html>
1.6 +<head>
1.7 + <title>Test ConvolverNode channel count</title>
1.8 + <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
1.9 + <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
1.10 +</head>
1.11 +<body>
1.12 +<pre id="test">
1.13 +<script src="webaudio.js" type="text/javascript"></script>
1.14 +<script class="testbody" type="text/javascript">
1.15 +
1.16 +const signalLength = 2048;
1.17 +const responseLength = 1000;
1.18 +const outputLength = 2048; // < signalLength + responseLength to test bug 910171
1.19 +
1.20 +var gTest = {
1.21 + length: outputLength,
1.22 + numberOfChannels: 2,
1.23 + createGraph: function(context) {
1.24 + var buffer = context.createBuffer(2, signalLength, context.sampleRate);
1.25 + for (var i = 0; i < signalLength; ++i) {
1.26 + var sample = Math.sin(440 * 2 * Math.PI * i / context.sampleRate);
1.27 + // When mixed into a single channel, this produces silence
1.28 + buffer.getChannelData(0)[i] = sample;
1.29 + buffer.getChannelData(1)[i] = -sample;
1.30 + }
1.31 +
1.32 + var response = context.createBuffer(2, responseLength, context.sampleRate);
1.33 + for (var i = 0; i < responseLength; ++i) {
1.34 + response.getChannelData(0)[i] = i / responseLength;
1.35 + response.getChannelData(1)[i] = 1 - (i / responseLength);
1.36 + }
1.37 +
1.38 + var convolver = context.createConvolver();
1.39 + convolver.buffer = response;
1.40 + convolver.channelCount = 1;
1.41 +
1.42 + expectException(function() { convolver.channelCount = 3; },
1.43 + DOMException.NOT_SUPPORTED_ERR);
1.44 + convolver.channelCountMode = "explicit";
1.45 + expectException(function() { convolver.channelCountMode = "max"; },
1.46 + DOMException.NOT_SUPPORTED_ERR);
1.47 + convolver.channelInterpretation = "discrete";
1.48 + convolver.channelInterpretation = "speakers";
1.49 +
1.50 + var source = context.createBufferSource();
1.51 + source.buffer = buffer;
1.52 + source.connect(convolver);
1.53 + source.start(0);
1.54 +
1.55 + return convolver;
1.56 + },
1.57 +};
1.58 +
1.59 +runTest();
1.60 +
1.61 +</script>
1.62 +</pre>
1.63 +</body>
1.64 +</html>
