зеркало из https://github.com/mozilla/gecko-dev.git
74 строки
2.3 KiB
HTML
74 строки
2.3 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
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<script type="text/javascript" src="webaudio.js"></script>
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<script type="text/javascript" src="layouttest-glue.js"></script>
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<script type="text/javascript" src="blink/audio-testing.js"></script>
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<script type="text/javascript" src="blink/convolution-testing.js"></script>
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<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
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</head>
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<body>
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<div id="description"></div>
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<div id="console"></div>
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<script>
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description("Tests ConvolverNode processing a mono channel with mono impulse response.");
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SimpleTest.waitForExplicitFinish();
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// To test the convolver, we convolve two square pulses together to
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// produce a triangular pulse. To verify the result is correct we
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// check several parts of the result. First, we make sure the initial
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// part of the result is zero (due to the latency in the convolver).
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// Next, the triangular pulse should match the theoretical result to
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// within some roundoff. After the triangular pulse, the result
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// should be exactly zero, but round-off prevents that. We make sure
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// the part after the pulse is sufficiently close to zero. Finally,
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// the result should be exactly zero because the inputs are exactly
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// zero.
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function runTest() {
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if (window.testRunner) {
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testRunner.dumpAsText();
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testRunner.waitUntilDone();
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}
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window.jsTestIsAsync = true;
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// Create offline audio context.
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var context = new OfflineAudioContext(2, sampleRate * renderLengthSeconds, sampleRate);
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var squarePulse = createSquarePulseBuffer(context, pulseLengthFrames);
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var trianglePulse = createTrianglePulseBuffer(context, 2 * pulseLengthFrames);
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var bufferSource = context.createBufferSource();
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bufferSource.buffer = squarePulse;
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var convolver = context.createConvolver();
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convolver.normalize = false;
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convolver.buffer = squarePulse;
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bufferSource.connect(convolver);
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convolver.connect(context.destination);
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bufferSource.start(0);
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context.oncomplete = checkConvolvedResult(trianglePulse);
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context.startRendering();
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}
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function finishJSTest() {
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SimpleTest.finish();
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}
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runTest();
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successfullyParsed = true;
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</script>
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<script src="../fast/js/resources/js-test-post.js"></script>
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</body>
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</html>
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