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comparison: content/media/webaudio/test/test_convolverNodeWithGain.html
content/media/webaudio/test/test_convolverNodeWithGain.html
- branch
- TOR_BUG_9701
- changeset 13
- 44a2da4a2ab2
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| -1:000000000000 | 0:19ba60af0103 |
|---|---|
| 1 <!DOCTYPE HTML> | |
| 2 <html> | |
| 3 <head> | |
| 4 <title>Test ConvolverNode after a GainNode - Bug 891254 </title> | |
| 5 <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script> | |
| 6 <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" /> | |
| 7 </head> | |
| 8 <body> | |
| 9 <pre id="test"> | |
| 10 <script src="webaudio.js" type="text/javascript"></script> | |
| 11 <script class="testbody" type="text/javascript"> | |
| 12 | |
| 13 const signalLength = 2048; | |
| 14 const responseLength = 100; | |
| 15 const outputLength = 4096; // > signalLength + responseLength | |
| 16 | |
| 17 var gTest = { | |
| 18 length: outputLength, | |
| 19 numberOfChannels: 1, | |
| 20 createGraph: function(context) { | |
| 21 var buffer = context.createBuffer(1, signalLength, context.sampleRate); | |
| 22 for (var i = 0; i < signalLength; ++i) { | |
| 23 buffer.getChannelData(0)[i] = Math.sin(2 * Math.PI * i / signalLength); | |
| 24 } | |
| 25 | |
| 26 var source = context.createBufferSource(); | |
| 27 source.buffer = buffer; | |
| 28 source.start(0); | |
| 29 | |
| 30 var response = context.createBuffer(1, responseLength, context.sampleRate); | |
| 31 for (var i = 0; i < responseLength; ++i) { | |
| 32 response.getChannelData(0)[i] = i / responseLength; | |
| 33 } | |
| 34 | |
| 35 var gain = context.createGain(); | |
| 36 gain.gain.value = -1; | |
| 37 source.connect(gain); | |
| 38 | |
| 39 var convolver1 = context.createConvolver(); | |
| 40 convolver1.buffer = response; | |
| 41 gain.connect(convolver1); | |
| 42 | |
| 43 var convolver2 = context.createConvolver(); | |
| 44 convolver2.buffer = response; | |
| 45 source.connect(convolver2); | |
| 46 | |
| 47 // The output of convolver1 should be the inverse of convolver2, so blend | |
| 48 // them together and expect silence. | |
| 49 var blend = context.createGain(); | |
| 50 convolver1.connect(blend); | |
| 51 convolver2.connect(blend); | |
| 52 | |
| 53 return blend; | |
| 54 }, | |
| 55 }; | |
| 56 | |
| 57 runTest(); | |
| 58 | |
| 59 </script> | |
| 60 </pre> | |
| 61 </body> | |
| 62 </html> |
