content/media/webaudio/test/test_mediaStreamAudioSourceNode.html

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1 <!DOCTYPE HTML>
2 <html>
3 <meta charset="utf-8">
4 <head>
5 <title>Test MediaStreamAudioSourceNode processing is correct</title>
6 <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
7 <script type="text/javascript" src="webaudio.js"></script>
8 <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
9 </head>
10 <body>
11 <pre id="test">
12 <script class="testbody" type="text/javascript">
13
14 function createBuffer(context, delay) {
15 var buffer = context.createBuffer(2, 2048, context.sampleRate);
16 for (var i = 0; i < 2048 - delay; ++i) {
17 buffer.getChannelData(0)[i + delay] = Math.sin(440 * 2 * Math.PI * i / context.sampleRate);
18 buffer.getChannelData(1)[i + delay] = -buffer.getChannelData(0)[i + delay];
19 }
20 return buffer;
21 }
22
23 var gTest = {
24 length: 2048,
25 skipOfflineContextTests: true,
26 createGraph: function(context) {
27 var sourceGraph = new AudioContext();
28 var source = sourceGraph.createBufferSource();
29 source.buffer = createBuffer(context, 0);
30 var dest = sourceGraph.createMediaStreamDestination();
31 source.connect(dest);
32 source.start(0);
33
34 var mediaStreamSource = context.createMediaStreamSource(dest.stream);
35 // channelCount and channelCountMode should have no effect
36 mediaStreamSource.channelCount = 1;
37 mediaStreamSource.channelCountMode = "explicit";
38 return mediaStreamSource;
39 },
40 createExpectedBuffers: function(context) {
41 return createBuffer(context, 1);
42 },
43 };
44
45 runTest();
46
47 </script>
48 </pre>
49 </body>
50 </html>

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