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comparison: content/media/webaudio/test/test_scriptProcessorNodeChannelCount.html
content/media/webaudio/test/test_scriptProcessorNodeChannelCount.html
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:b87e5a6f188a |
|---|---|
| 1 <!DOCTYPE HTML> | |
| 2 <html> | |
| 3 <head> | |
| 4 <title>Test 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 // We do not use our generic graph test framework here because | |
| 14 // the testing logic here is sort of complicated, and would | |
| 15 // not be easy to map to OfflineAudioContext, as ScriptProcessorNodes | |
| 16 // can experience delays. | |
| 17 | |
| 18 SimpleTest.waitForExplicitFinish(); | |
| 19 addLoadEvent(function() { | |
| 20 var context = new AudioContext(); | |
| 21 var buffer = context.createBuffer(6, 2048, context.sampleRate); | |
| 22 for (var i = 0; i < 2048; ++i) { | |
| 23 for (var j = 0; j < 6; ++j) { | |
| 24 buffer.getChannelData(0)[i] = Math.sin(440 * j * Math.PI * i / context.sampleRate); | |
| 25 } | |
| 26 } | |
| 27 | |
| 28 var monoBuffer = context.createBuffer(1, 2048, context.sampleRate); | |
| 29 for (var i = 0; i < 2048; ++i) { | |
| 30 monoBuffer.getChannelData(0)[i] = 1; | |
| 31 } | |
| 32 | |
| 33 var source = context.createBufferSource(); | |
| 34 | |
| 35 var sp = context.createScriptProcessor(2048, 3); | |
| 36 expectException(function() { sp.channelCount = 2; }, | |
| 37 DOMException.NOT_SUPPORTED_ERR); | |
| 38 sp.channelCountMode = "explicit"; | |
| 39 expectException(function() { sp.channelCountMode = "max"; }, | |
| 40 DOMException.NOT_SUPPORTED_ERR); | |
| 41 expectException(function() { sp.channelCountMode = "clamped-max"; }, | |
| 42 DOMException.NOT_SUPPORTED_ERR); | |
| 43 sp.channelInterpretation = "discrete"; | |
| 44 source.start(0); | |
| 45 source.buffer = buffer; | |
| 46 source.connect(sp); | |
| 47 sp.connect(context.destination); | |
| 48 | |
| 49 var monoSource = context.createBufferSource(); | |
| 50 monoSource.buffer = monoBuffer; | |
| 51 monoSource.connect(sp); | |
| 52 monoSource.start(2048 / context.sampleRate); | |
| 53 | |
| 54 sp.onaudioprocess = function(e) { | |
| 55 is(e.inputBuffer.numberOfChannels, 3, "Should be correctly down-mixed to three channels"); | |
| 56 for (var i = 0; i < 3; ++i) { | |
| 57 compareChannels(e.inputBuffer.getChannelData(i), buffer.getChannelData(i)); | |
| 58 } | |
| 59 | |
| 60 // On the next iteration, we'll get a silence buffer | |
| 61 sp.onaudioprocess = function(e) { | |
| 62 var emptyBuffer = context.createBuffer(1, 2048, context.sampleRate); | |
| 63 is(e.inputBuffer.numberOfChannels, 3, "Should be correctly up-mixed to three channels"); | |
| 64 compareChannels(e.inputBuffer.getChannelData(0), monoBuffer.getChannelData(0)); | |
| 65 for (var i = 1; i < 3; ++i) { | |
| 66 compareChannels(e.inputBuffer.getChannelData(i), emptyBuffer.getChannelData(0)); | |
| 67 } | |
| 68 | |
| 69 sp.onaudioprocess = null; | |
| 70 sp.disconnect(context.destination); | |
| 71 | |
| 72 SimpleTest.finish(); | |
| 73 }; | |
| 74 }; | |
| 75 }); | |
| 76 | |
| 77 </script> | |
| 78 </pre> | |
| 79 </body> | |
| 80 </html> |
