1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/media/webaudio/test/test_channelMergerNodeWithVolume.html Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,60 @@
1.4 +<!DOCTYPE HTML>
1.5 +<html>
1.6 +<head>
1.7 + <title>Test ChannelMergerNode</title>
1.8 + <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
1.9 + <script type="text/javascript" src="webaudio.js"></script>
1.10 + <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
1.11 +</head>
1.12 +<body>
1.13 +<pre id="test">
1.14 +<script class="testbody" type="text/javascript">
1.15 +
1.16 +var gTest = {
1.17 + length: 2048,
1.18 + numberOfChannels: 8,
1.19 + createGraph: function(context) {
1.20 + var buffers = [];
1.21 + for (var j = 0; j < 4; ++j) {
1.22 + var buffer = context.createBuffer(2, 2048, context.sampleRate);
1.23 + for (var i = 0; i < 2048; ++i) {
1.24 + buffer.getChannelData(0)[i] = Math.sin(440 * 2 * (j + 1) * Math.PI * i / context.sampleRate);
1.25 + // Second channel is silent
1.26 + }
1.27 + buffers.push(buffer);
1.28 + }
1.29 +
1.30 + var merger = context.createChannelMerger();
1.31 + is(merger.channelCount, 2, "merger node has 2 input channels by default");
1.32 + is(merger.channelCountMode, "max", "Correct channelCountMode for the merger node");
1.33 + is(merger.channelInterpretation, "speakers", "Correct channelCountInterpretation for the merger node");
1.34 +
1.35 + for (var i = 0; i < 4; ++i) {
1.36 + var source = context.createBufferSource();
1.37 + source.buffer = buffers[i];
1.38 + var gain = context.createGain();
1.39 + gain.gain.value = 0.5;
1.40 + source.connect(gain);
1.41 + gain.connect(merger, 0, i);
1.42 + source.start(0);
1.43 + }
1.44 +
1.45 + return merger;
1.46 + },
1.47 + createExpectedBuffers: function(context) {
1.48 + var expectedBuffer = context.createBuffer(8, 2048, context.sampleRate);
1.49 + for (var i = 0; i < 4; ++i) {
1.50 + for (var j = 0; j < 2048; ++j) {
1.51 + expectedBuffer.getChannelData(i * 2)[j] = Math.sin(440 * 2 * (i + 1) * Math.PI * j / context.sampleRate) / 2;
1.52 + }
1.53 + }
1.54 + return expectedBuffer;
1.55 + },
1.56 +};
1.57 +
1.58 +runTest();
1.59 +
1.60 +</script>
1.61 +</pre>
1.62 +</body>
1.63 +</html>
