content/media/webaudio/test/test_channelSplitterNode.html@6474c204b198
content/media/webaudio/test/test_channelSplitterNode.html
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
1 <!DOCTYPE HTML>
2 <html>
3 <head>
4 <title>Test ChannelSplitterNode</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 // We do not use our generic graph test framework here because
14 // the splitter node is special in that it creates multiple
15 // output ports.
17 SimpleTest.waitForExplicitFinish();
18 addLoadEvent(function() {
19 var context = new AudioContext();
20 var buffer = context.createBuffer(4, 2048, context.sampleRate);
21 for (var j = 0; j < 4; ++j) {
22 for (var i = 0; i < 2048; ++i) {
23 buffer.getChannelData(j)[i] = Math.sin(440 * 2 * (j + 1) * Math.PI * i / context.sampleRate);
24 }
25 }
26 var emptyBuffer = context.createBuffer(1, 2048, context.sampleRate);
28 var destination = context.destination;
30 var source = context.createBufferSource();
32 var splitter = context.createChannelSplitter();
33 is(splitter.channelCount, 2, "splitter node has 2 input channels by default");
34 is(splitter.channelCountMode, "max", "Correct channelCountMode for the splitter node");
35 is(splitter.channelInterpretation, "speakers", "Correct channelCountInterpretation for the splitter node");
37 source.buffer = buffer;
38 source.connect(splitter);
40 var channelsSeen = 0;
41 function createHandler(i) {
42 return function(e) {
43 is(e.inputBuffer.numberOfChannels, 1, "Correct input channel count");
44 if (i < 4) {
45 compareChannels(e.inputBuffer.getChannelData(0), buffer.getChannelData(i));
46 } else {
47 compareChannels(e.inputBuffer.getChannelData(0), emptyBuffer.getChannelData(0));
48 }
49 e.target.onaudioprocess = null;
50 ++channelsSeen;
52 if (channelsSeen == 6) {
53 SimpleTest.finish();
54 }
55 };
56 }
58 for (var i = 0; i < 6; ++i) {
59 var sp = context.createScriptProcessor(2048, 1);
60 splitter.connect(sp, i);
61 sp.onaudioprocess = createHandler(i);
62 sp.connect(destination);
63 }
65 source.start(0);
66 });
68 </script>
69 </pre>
70 </body>
71 </html>
