62 lines
2.2 KiB
HTML
62 lines
2.2 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<title>
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convolution-mono-mono.html
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</title>
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script src="/webaudio/resources/audit-util.js"></script>
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<script src="/webaudio/resources/audit.js"></script>
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<script src="/webaudio/resources/convolution-testing.js"></script>
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</head>
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<body>
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<script id="layout-test-code">
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let audit = Audit.createTaskRunner();
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// description("Tests ConvolverNode processing a mono channel with mono
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// impulse response.");
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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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audit.define('test', function(task, should) {
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// Create offline audio context.
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let context = new OfflineAudioContext(
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2, sampleRate * renderLengthSeconds, sampleRate);
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let squarePulse = createSquarePulseBuffer(context, pulseLengthFrames);
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let trianglePulse =
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createTrianglePulseBuffer(context, 2 * pulseLengthFrames);
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let bufferSource = context.createBufferSource();
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bufferSource.buffer = squarePulse;
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let 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.startRendering()
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.then(buffer => {
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checkConvolvedResult(buffer, trianglePulse, should);
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})
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.then(task.done.bind(task));
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;
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});
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audit.run();
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</script>
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</body>
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</html>
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