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| 1 <!DOCTYPE html> | |
| 2 | |
| 3 <html> | |
| 4 <head> | |
| 5 <script src="../resources/js-test.js"></script> | |
| 6 <script src="resources/compatibility.js"></script> | |
| 7 <script src="resources/audit-util.js"></script> | |
| 8 <script src="resources/audio-testing.js"></script> | |
| 9 <script src="resources/convolution-testing.js"></script> | |
| 10 </head> | |
| 11 | |
| 12 <body> | |
| 13 | |
| 14 <div id="description"></div> | |
| 15 <div id="console"></div> | |
| 16 | |
| 17 <script> | |
| 18 description("Tests ConvolverNode processing a mono channel with mono impulse res
ponse."); | |
| 19 | |
| 20 // To test the convolver, we convolve two square pulses together to | |
| 21 // produce a triangular pulse. To verify the result is correct we | |
| 22 // check several parts of the result. First, we make sure the initial | |
| 23 // part of the result is zero (due to the latency in the convolver). | |
| 24 // Next, the triangular pulse should match the theoretical result to | |
| 25 // within some roundoff. After the triangular pulse, the result | |
| 26 // should be exactly zero, but round-off prevents that. We make sure | |
| 27 // the part after the pulse is sufficiently close to zero. Finally, | |
| 28 // the result should be exactly zero because the inputs are exactly | |
| 29 // zero. | |
| 30 function runTest() { | |
| 31 if (window.testRunner) { | |
| 32 testRunner.dumpAsText(); | |
| 33 testRunner.waitUntilDone(); | |
| 34 } | |
| 35 | |
| 36 window.jsTestIsAsync = true; | |
| 37 | |
| 38 // Create offline audio context. | |
| 39 var context = new OfflineAudioContext(2, sampleRate * renderLengthSeconds, s
ampleRate); | |
| 40 | |
| 41 var squarePulse = createSquarePulseBuffer(context, pulseLengthFrames); | |
| 42 var trianglePulse = createTrianglePulseBuffer(context, 2 * pulseLengthFrames
); | |
| 43 | |
| 44 var bufferSource = context.createBufferSource(); | |
| 45 bufferSource.buffer = squarePulse; | |
| 46 | |
| 47 var convolver = context.createConvolver(); | |
| 48 convolver.normalize = false; | |
| 49 convolver.buffer = squarePulse; | |
| 50 | |
| 51 bufferSource.connect(convolver); | |
| 52 convolver.connect(context.destination); | |
| 53 | |
| 54 bufferSource.start(0); | |
| 55 | |
| 56 context.oncomplete = checkConvolvedResult(trianglePulse); | |
| 57 context.startRendering(); | |
| 58 } | |
| 59 | |
| 60 runTest(); | |
| 61 successfullyParsed = true; | |
| 62 | |
| 63 </script> | |
| 64 | |
| 65 </body> | |
| 66 </html> | |
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Chromium Code Reviews
Issue 2581463002:
Refactor WebAudio test directory (Closed)
