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+<!DOCTYPE HTML>
+<html>
+<head>
+ <title>Test ChannelSplitterNode</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">
+
+// We do not use our generic graph test framework here because
+// the splitter node is special in that it creates multiple
+// output ports.
+
+SimpleTest.waitForExplicitFinish();
+addLoadEvent(function() {
+ var context = new AudioContext();
+ var buffer = context.createBuffer(4, 2048, context.sampleRate);
+ var expectedBuffer = context.createBuffer(4, 2048, context.sampleRate);
+ for (var j = 0; j < 4; ++j) {
+ for (var i = 0; i < 2048; ++i) {
+ buffer.getChannelData(j)[i] = Math.sin(440 * 2 * (j + 1) * Math.PI * i / context.sampleRate);
+ expectedBuffer.getChannelData(j)[i] = buffer.getChannelData(j)[i] / 2;
+ }
+ }
+ var emptyBuffer = context.createBuffer(1, 2048, context.sampleRate);
+
+ var destination = context.destination;
+
+ var source = context.createBufferSource();
+
+ var splitter = context.createChannelSplitter();
+ is(splitter.channelCount, 2, "splitter node has 2 input channels by default");
+ is(splitter.channelCountMode, "max", "Correct channelCountMode for the splitter node");
+ is(splitter.channelInterpretation, "speakers", "Correct channelCountInterpretation for the splitter node");
+
+ source.buffer = buffer;
+ var gain = context.createGain();
+ gain.gain.value = 0.5;
+ source.connect(gain);
+ gain.connect(splitter);
+
+ var channelsSeen = 0;
+ function createHandler(i) {
+ return function(e) {
+ is(e.inputBuffer.numberOfChannels, 1, "Correct input channel count");
+ if (i < 4) {
+ compareBuffers(e.inputBuffer.getChannelData(0), expectedBuffer.getChannelData(i));
+ } else {
+ compareBuffers(e.inputBuffer.getChannelData(0), emptyBuffer.getChannelData(0));
+ }
+ e.target.onaudioprocess = null;
+ ++channelsSeen;
+
+ if (channelsSeen == 6) {
+ SimpleTest.finish();
+ }
+ };
+ }
+
+ for (var i = 0; i < 6; ++i) {
+ var sp = context.createScriptProcessor(2048, 1);
+ splitter.connect(sp, i);
+ sp.onaudioprocess = createHandler(i);
+ sp.connect(destination);
+ }
+
+ source.start(0);
+});
+
+</script>
+</pre>
+</body>
+</html>