// 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);
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);
}
} var emptyBuffer = context.createBuffer(1, 2048, context.sampleRate);
var destination = context.destination;
varsource = context.createBufferSource();
var splitter = new ChannelSplitterNode(context);
is(splitter.channelCount, 6, "splitter node has 2 input channels by default");
is(splitter.channelCountMode, "explicit", "Correct channelCountMode for the splitter node");
is(splitter.channelInterpretation, "discrete", "Correct channelCountInterpretation for the splitter node");
source.buffer = buffer; source.connect(splitter);
var channelsSeen = 0;
function createHandler(i) {
return function(e) {
is(e.inputBuffer.numberOfChannels, 1, "Correct input channel count");
if (i < 4) {
compareChannels(e.inputBuffer.getChannelData(0), buffer.getChannelData(i));
} else {
compareChannels(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>
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