content/media/webaudio/test/test_audioBufferSourceNodeLoopStartEnd.html@b8a032363ba2 (annotated)
content/media/webaudio/test/test_audioBufferSourceNodeLoopStartEnd.html
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
| michael@0 | 1 | <!DOCTYPE HTML> |
| michael@0 | 2 | <html> |
| michael@0 | 3 | <head> |
| michael@0 | 4 | <title>Test AudioBufferSourceNode looping</title> |
| michael@0 | 5 | <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script> |
| michael@0 | 6 | <script type="text/javascript" src="webaudio.js"></script> |
| michael@0 | 7 | <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" /> |
| michael@0 | 8 | </head> |
| michael@0 | 9 | <body> |
| michael@0 | 10 | <pre id="test"> |
| michael@0 | 11 | <script class="testbody" type="text/javascript"> |
| michael@0 | 12 | |
| michael@0 | 13 | var gTest = { |
| michael@0 | 14 | length: 2048 * 4, |
| michael@0 | 15 | numberOfChannels: 1, |
| michael@0 | 16 | createGraph: function(context) { |
| michael@0 | 17 | var buffer = context.createBuffer(1, 2048, context.sampleRate); |
| michael@0 | 18 | for (var i = 0; i < 2048; ++i) { |
| michael@0 | 19 | buffer.getChannelData(0)[i] = Math.sin(440 * 2 * Math.PI * i / context.sampleRate); |
| michael@0 | 20 | } |
| michael@0 | 21 | |
| michael@0 | 22 | var source = context.createBufferSource(); |
| michael@0 | 23 | source.buffer = buffer; |
| michael@0 | 24 | source.start(0); |
| michael@0 | 25 | source.loop = true; |
| michael@0 | 26 | source.loopStart = buffer.duration * 0.25; |
| michael@0 | 27 | source.loopEnd = buffer.duration * 0.75; |
| michael@0 | 28 | return source; |
| michael@0 | 29 | }, |
| michael@0 | 30 | createExpectedBuffers: function(context) { |
| michael@0 | 31 | var expectedBuffer = context.createBuffer(1, 2048 * 4, context.sampleRate); |
| michael@0 | 32 | for (var i = 0; i < 1536; ++i) { |
| michael@0 | 33 | expectedBuffer.getChannelData(0)[i] = Math.sin(440 * 2 * Math.PI * i / context.sampleRate); |
| michael@0 | 34 | } |
| michael@0 | 35 | for (var i = 0; i < 6; ++i) { |
| michael@0 | 36 | for (var j = 512; j < 1536; ++j) { |
| michael@0 | 37 | expectedBuffer.getChannelData(0)[1536 + i * 1024 + j - 512] = Math.sin(440 * 2 * Math.PI * j / context.sampleRate); |
| michael@0 | 38 | } |
| michael@0 | 39 | } |
| michael@0 | 40 | for (var j = 7680; j < 2048 * 4; ++j) { |
| michael@0 | 41 | expectedBuffer.getChannelData(0)[j] = Math.sin(440 * 2 * Math.PI * (j - 7168) / context.sampleRate); |
| michael@0 | 42 | } |
| michael@0 | 43 | return expectedBuffer; |
| michael@0 | 44 | }, |
| michael@0 | 45 | }; |
| michael@0 | 46 | |
| michael@0 | 47 | runTest(); |
| michael@0 | 48 | |
| michael@0 | 49 | </script> |
| michael@0 | 50 | </pre> |
| michael@0 | 51 | </body> |
| michael@0 | 52 | </html> |
