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comparison: content/media/webaudio/test/test_audioBufferSourceNodeOffset.html
content/media/webaudio/test/test_audioBufferSourceNodeOffset.html
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:445c9216ad64 |
|---|---|
| 1 <!DOCTYPE HTML> | |
| 2 <html> | |
| 3 <head> | |
| 4 <title>Test the offset property on AudioBufferSourceNode</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"> | |
| 12 | |
| 13 var fuzz = 0.3; | |
| 14 | |
| 15 if (navigator.platform.startsWith("Mac")) { | |
| 16 // bug 895720 | |
| 17 fuzz = 0.6; | |
| 18 } | |
| 19 | |
| 20 SimpleTest.waitForExplicitFinish(); | |
| 21 addLoadEvent(function() { | |
| 22 var samplesFromSource = 0; | |
| 23 var context = new AudioContext(); | |
| 24 var sp = context.createScriptProcessor(256); | |
| 25 | |
| 26 sp.onaudioprocess = function(e) { | |
| 27 samplesFromSource += e.inputBuffer.length; | |
| 28 } | |
| 29 | |
| 30 var buffer = context.createBuffer(1, context.sampleRate, context.sampleRate); | |
| 31 for (var i = 0; i < context.sampleRate; ++i) { | |
| 32 buffer.getChannelData(0)[i] = Math.sin(440 * 2 * Math.PI * i / context.sampleRate); | |
| 33 } | |
| 34 | |
| 35 var source = context.createBufferSource(); | |
| 36 | |
| 37 source.onended = function(e) { | |
| 38 // The timing at which the audioprocess and ended listeners are called can | |
| 39 // change, hence the fuzzy equal here. | |
| 40 var errorRatio = samplesFromSource / (0.5 * context.sampleRate); | |
| 41 ok(errorRatio > (1.0 - fuzz) && errorRatio < (1.0 + fuzz), | |
| 42 "Correct number of samples received (expected: " + | |
| 43 (0.5 * context.sampleRate) + ", actual: " + samplesFromSource + ")."); | |
| 44 SimpleTest.finish(); | |
| 45 }; | |
| 46 | |
| 47 source.buffer = buffer; | |
| 48 source.connect(sp); | |
| 49 source.start(0, 0.5); | |
| 50 }); | |
| 51 | |
| 52 </script> | |
| 53 </pre> | |
| 54 </body> | |
| 55 </html> |
