content/media/webaudio/test/test_channelMergerNodeWithVolume.html@44a2da4a2ab2
content/media/webaudio/test/test_channelMergerNodeWithVolume.html
Fri, 16 Jan 2015 04:50:19 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Fri, 16 Jan 2015 04:50:19 +0100
- branch
- TOR_BUG_9701
- changeset 13
- 44a2da4a2ab2
- permissions
- -rw-r--r--
Replace accessor implementation with direct member state manipulation, by
request https://trac.torproject.org/projects/tor/ticket/9701#comment:32
1 <!DOCTYPE HTML>
2 <html>
3 <head>
4 <title>Test ChannelMergerNode</title>
5 <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
6 <script type="text/javascript" src="webaudio.js"></script>
7 <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
8 </head>
9 <body>
10 <pre id="test">
11 <script class="testbody" type="text/javascript">
13 var gTest = {
14 length: 2048,
15 numberOfChannels: 8,
16 createGraph: function(context) {
17 var buffers = [];
18 for (var j = 0; j < 4; ++j) {
19 var buffer = context.createBuffer(2, 2048, context.sampleRate);
20 for (var i = 0; i < 2048; ++i) {
21 buffer.getChannelData(0)[i] = Math.sin(440 * 2 * (j + 1) * Math.PI * i / context.sampleRate);
22 // Second channel is silent
23 }
24 buffers.push(buffer);
25 }
27 var merger = context.createChannelMerger();
28 is(merger.channelCount, 2, "merger node has 2 input channels by default");
29 is(merger.channelCountMode, "max", "Correct channelCountMode for the merger node");
30 is(merger.channelInterpretation, "speakers", "Correct channelCountInterpretation for the merger node");
32 for (var i = 0; i < 4; ++i) {
33 var source = context.createBufferSource();
34 source.buffer = buffers[i];
35 var gain = context.createGain();
36 gain.gain.value = 0.5;
37 source.connect(gain);
38 gain.connect(merger, 0, i);
39 source.start(0);
40 }
42 return merger;
43 },
44 createExpectedBuffers: function(context) {
45 var expectedBuffer = context.createBuffer(8, 2048, context.sampleRate);
46 for (var i = 0; i < 4; ++i) {
47 for (var j = 0; j < 2048; ++j) {
48 expectedBuffer.getChannelData(i * 2)[j] = Math.sin(440 * 2 * (i + 1) * Math.PI * j / context.sampleRate) / 2;
49 }
50 }
51 return expectedBuffer;
52 },
53 };
55 runTest();
57 </script>
58 </pre>
59 </body>
60 </html>
