blob: 8f4cc79afe468326e5fed2a914b9bffd485a0b98 [file] [log] [blame]
<!DOCTYPE html>
<script src="resources/compatibility.js"></script>
<script type="text/javascript" src="resources/audio-testing.js"></script>
<script src="../resources/js-test.js"></script>
<script src="resources/convolution-testing.js"></script>
<div id="description"></div>
<div id="console"></div>
description("Tests ConvolverNode processing a mono channel with mono impulse response.");
// To test the convolver, we convolve two square pulses together to
// produce a triangular pulse. To verify the result is correct we
// check several parts of the result. First, we make sure the initial
// part of the result is zero (due to the latency in the convolver).
// Next, the triangular pulse should match the theoretical result to
// within some roundoff. After the triangular pulse, the result
// should be exactly zero, but round-off prevents that. We make sure
// the part after the pulse is sufficiently close to zero. Finally,
// the result should be exactly zero because the inputs are exactly
// zero.
function runTest() {
if (window.testRunner) {
window.jsTestIsAsync = true;
// Create offline audio context.
var context = new OfflineAudioContext(2, sampleRate * renderLengthSeconds, sampleRate);
var squarePulse = createSquarePulseBuffer(context, pulseLengthFrames);
var trianglePulse = createTrianglePulseBuffer(context, 2 * pulseLengthFrames);
var bufferSource = context.createBufferSource();
bufferSource.buffer = squarePulse;
var convolver = context.createConvolver();
convolver.normalize = false;
convolver.buffer = squarePulse;
context.oncomplete = checkConvolvedResult(trianglePulse);
successfullyParsed = true;