2013-05-06 22:30:47 +04:00
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<!DOCTYPE HTML>
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<html>
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<head>
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<title>Test ChannelSplitterNode</title>
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2019-04-16 06:53:28 +03:00
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<script src="/tests/SimpleTest/SimpleTest.js"></script>
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2013-05-06 22:30:47 +04:00
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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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2013-05-09 16:45:35 +04:00
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// We do not use our generic graph test framework here because
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// the splitter node is special in that it creates multiple
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// output ports.
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2013-05-06 22:30:47 +04:00
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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(4, 2048, context.sampleRate);
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var expectedBuffer = context.createBuffer(4, 2048, context.sampleRate);
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for (var j = 0; j < 4; ++j) {
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for (var i = 0; i < 2048; ++i) {
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buffer.getChannelData(j)[i] = Math.sin(440 * 2 * (j + 1) * Math.PI * i / context.sampleRate);
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expectedBuffer.getChannelData(j)[i] = buffer.getChannelData(j)[i] / 2;
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}
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}
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var emptyBuffer = context.createBuffer(1, 2048, context.sampleRate);
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var destination = context.destination;
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var source = context.createBufferSource();
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var splitter = context.createChannelSplitter();
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2018-05-30 19:23:37 +03:00
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is(splitter.channelCount, 6, "splitter node has 2 input channels by default");
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is(splitter.channelCountMode, "explicit", "Correct channelCountMode for the splitter node");
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is(splitter.channelInterpretation, "discrete", "Correct channelCountInterpretation for the splitter node");
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2013-05-06 22:30:47 +04:00
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source.buffer = buffer;
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var gain = context.createGain();
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gain.gain.value = 0.5;
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source.connect(gain);
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gain.connect(splitter);
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var channelsSeen = 0;
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function createHandler(i) {
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return function(e) {
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is(e.inputBuffer.numberOfChannels, 1, "Correct input channel count");
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if (i < 4) {
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compareBuffers(e.inputBuffer.getChannelData(0), expectedBuffer.getChannelData(i));
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} else {
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compareBuffers(e.inputBuffer.getChannelData(0), emptyBuffer.getChannelData(0));
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}
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e.target.onaudioprocess = null;
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++channelsSeen;
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if (channelsSeen == 6) {
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SimpleTest.finish();
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}
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};
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}
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for (var i = 0; i < 6; ++i) {
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var sp = context.createScriptProcessor(2048, 1);
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splitter.connect(sp, i);
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sp.onaudioprocess = createHandler(i);
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sp.connect(destination);
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}
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source.start(0);
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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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