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comparison: content/media/webaudio/test/test_periodicWave.html
content/media/webaudio/test/test_periodicWave.html
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:faa6b9478363 |
|---|---|
| 1 <!DOCTYPE HTML> | |
| 2 <html> | |
| 3 <head> | |
| 4 <title>Test the PeriodicWave interface</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 SimpleTest.waitForExplicitFinish(); | |
| 14 | |
| 15 // real and imag are used in separate PeriodicWaves to make their peak values | |
| 16 // easy to determine. | |
| 17 const realMax = 99; | |
| 18 var real = new Float32Array(realMax + 1); | |
| 19 real[1] = 2.0; // fundamental | |
| 20 real[realMax] = 3.0; | |
| 21 const realPeak = real[1] + real[realMax]; | |
| 22 const realFundamental = 19.0; | |
| 23 var imag = new Float32Array(4); | |
| 24 imag[0] = 6.0; // should be ignored. | |
| 25 imag[3] = 0.5; | |
| 26 const imagPeak = imag[3]; | |
| 27 const imagFundamental = 551.0; | |
| 28 | |
| 29 const testLength = 4096; | |
| 30 | |
| 31 addLoadEvent(function() { | |
| 32 var ac = new AudioContext(); | |
| 33 ac.createPeriodicWave(new Float32Array(4096), new Float32Array(4096)); | |
| 34 expectException(function() { | |
| 35 ac.createPeriodicWave(new Float32Array(512), imag); | |
| 36 }, DOMException.NOT_SUPPORTED_ERR); | |
| 37 expectException(function() { | |
| 38 ac.createPeriodicWave(new Float32Array(0), new Float32Array(0)); | |
| 39 }, DOMException.NOT_SUPPORTED_ERR); | |
| 40 expectException(function() { | |
| 41 ac.createPeriodicWave(new Float32Array(4097), new Float32Array(4097)); | |
| 42 }, DOMException.NOT_SUPPORTED_ERR); | |
| 43 | |
| 44 runTest(); | |
| 45 }); | |
| 46 | |
| 47 var gTest = { | |
| 48 createGraph: function(context) { | |
| 49 var merger = context.createChannelMerger(); | |
| 50 | |
| 51 var osc0 = context.createOscillator(); | |
| 52 var osc1 = context.createOscillator(); | |
| 53 | |
| 54 osc0.setPeriodicWave(context. | |
| 55 createPeriodicWave(real, | |
| 56 new Float32Array(real.length))); | |
| 57 osc1.setPeriodicWave(context. | |
| 58 createPeriodicWave(new Float32Array(imag.length), | |
| 59 imag)); | |
| 60 | |
| 61 osc0.frequency.value = realFundamental; | |
| 62 osc1.frequency.value = imagFundamental; | |
| 63 | |
| 64 osc0.start(); | |
| 65 osc1.start(); | |
| 66 | |
| 67 osc0.connect(merger, 0, 0); | |
| 68 osc1.connect(merger, 0, 1); | |
| 69 | |
| 70 return merger; | |
| 71 }, | |
| 72 createExpectedBuffers: function(context) { | |
| 73 var buffer = context.createBuffer(2, testLength, context.sampleRate); | |
| 74 | |
| 75 for (var i = 0; i < buffer.length; ++i) { | |
| 76 | |
| 77 buffer.getChannelData(0)[i] = 1.0 / realPeak * | |
| 78 (real[1] * Math.cos(2 * Math.PI * realFundamental * i / | |
| 79 context.sampleRate) + | |
| 80 real[realMax] * Math.cos(2 * Math.PI * realMax * realFundamental * i / | |
| 81 context.sampleRate)); | |
| 82 | |
| 83 buffer.getChannelData(1)[i] = 1.0 / imagPeak * | |
| 84 imag[3] * Math.sin(2 * Math.PI * 3 * imagFundamental * i / | |
| 85 context.sampleRate); | |
| 86 } | |
| 87 return buffer; | |
| 88 }, | |
| 89 }; | |
| 90 | |
| 91 </script> | |
| 92 </pre> | |
| 93 </body> | |
| 94 </html> |
