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81 lines
2.7 KiB
HTML
81 lines
2.7 KiB
HTML
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<!DOCTYPE HTML>
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<html>
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<head>
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<title>Test AudioBufferSourceNode</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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// We do not use our generic graph test framework here because
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// the testing logic here is sort of complicated, and would
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// not be easy to map to OfflineAudioContext, as ScriptProcessorNodes
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// can experience delays.
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SimpleTest.waitForExplicitFinish();
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addLoadEvent(function() {
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var context = new AudioContext();
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var buffer = context.createBuffer(6, 2048, context.sampleRate);
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for (var i = 0; i < 2048; ++i) {
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for (var j = 0; j < 6; ++j) {
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buffer.getChannelData(0)[i] = Math.sin(440 * j * Math.PI * i / context.sampleRate);
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}
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}
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var monoBuffer = context.createBuffer(1, 2048, context.sampleRate);
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for (var i = 0; i < 2048; ++i) {
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monoBuffer.getChannelData(0)[i] = 1;
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}
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var source = context.createBufferSource();
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var sp = context.createScriptProcessor(2048, 3);
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expectException(function() { sp.channelCount = 2; },
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DOMException.NOT_SUPPORTED_ERR);
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sp.channelCountMode = "explicit";
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expectException(function() { sp.channelCountMode = "max"; },
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DOMException.NOT_SUPPORTED_ERR);
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expectException(function() { sp.channelCountMode = "clamped-max"; },
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DOMException.NOT_SUPPORTED_ERR);
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sp.channelInterpretation = "discrete";
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source.start(0);
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source.buffer = buffer;
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source.connect(sp);
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sp.connect(context.destination);
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var monoSource = context.createBufferSource();
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monoSource.buffer = monoBuffer;
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monoSource.connect(sp);
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monoSource.start(2048 / context.sampleRate);
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sp.onaudioprocess = function(e) {
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is(e.inputBuffer.numberOfChannels, 3, "Should be correctly down-mixed to three channels");
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for (var i = 0; i < 3; ++i) {
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compareChannels(e.inputBuffer.getChannelData(i), buffer.getChannelData(i));
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}
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// On the next iteration, we'll get a silence buffer
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sp.onaudioprocess = function(e) {
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var emptyBuffer = context.createBuffer(1, 2048, context.sampleRate);
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is(e.inputBuffer.numberOfChannels, 3, "Should be correctly up-mixed to three channels");
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compareChannels(e.inputBuffer.getChannelData(0), monoBuffer.getChannelData(0));
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for (var i = 1; i < 3; ++i) {
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compareChannels(e.inputBuffer.getChannelData(i), emptyBuffer.getChannelData(0));
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}
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sp.onaudioprocess = null;
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sp.disconnect(context.destination);
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SimpleTest.finish();
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};
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};
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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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