content/media/webaudio/test/test_audioBufferSourceNodeLoopStartEnd.html@44a2da4a2ab2
content/media/webaudio/test/test_audioBufferSourceNodeLoopStartEnd.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 AudioBufferSourceNode looping</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 * 4,
15 numberOfChannels: 1,
16 createGraph: function(context) {
17 var buffer = context.createBuffer(1, 2048, context.sampleRate);
18 for (var i = 0; i < 2048; ++i) {
19 buffer.getChannelData(0)[i] = Math.sin(440 * 2 * Math.PI * i / context.sampleRate);
20 }
22 var source = context.createBufferSource();
23 source.buffer = buffer;
24 source.start(0);
25 source.loop = true;
26 source.loopStart = buffer.duration * 0.25;
27 source.loopEnd = buffer.duration * 0.75;
28 return source;
29 },
30 createExpectedBuffers: function(context) {
31 var expectedBuffer = context.createBuffer(1, 2048 * 4, context.sampleRate);
32 for (var i = 0; i < 1536; ++i) {
33 expectedBuffer.getChannelData(0)[i] = Math.sin(440 * 2 * Math.PI * i / context.sampleRate);
34 }
35 for (var i = 0; i < 6; ++i) {
36 for (var j = 512; j < 1536; ++j) {
37 expectedBuffer.getChannelData(0)[1536 + i * 1024 + j - 512] = Math.sin(440 * 2 * Math.PI * j / context.sampleRate);
38 }
39 }
40 for (var j = 7680; j < 2048 * 4; ++j) {
41 expectedBuffer.getChannelData(0)[j] = Math.sin(440 * 2 * Math.PI * (j - 7168) / context.sampleRate);
42 }
43 return expectedBuffer;
44 },
45 };
47 runTest();
49 </script>
50 </pre>
51 </body>
52 </html>
