1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/media/webaudio/test/test_convolverNode_mono_mono.html Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,73 @@
1.4 +<!DOCTYPE html>
1.5 +
1.6 +<html>
1.7 +<head>
1.8 +<script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
1.9 +<script type="text/javascript" src="webaudio.js"></script>
1.10 +<script type="text/javascript" src="layouttest-glue.js"></script>
1.11 +<script type="text/javascript" src="blink/audio-testing.js"></script>
1.12 +<script type="text/javascript" src="blink/convolution-testing.js"></script>
1.13 +<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
1.14 +</head>
1.15 +
1.16 +<body>
1.17 +
1.18 +<div id="description"></div>
1.19 +<div id="console"></div>
1.20 +
1.21 +<script>
1.22 +description("Tests ConvolverNode processing a mono channel with mono impulse response.");
1.23 +SimpleTest.waitForExplicitFinish();
1.24 +
1.25 +// To test the convolver, we convolve two square pulses together to
1.26 +// produce a triangular pulse. To verify the result is correct we
1.27 +// check several parts of the result. First, we make sure the initial
1.28 +// part of the result is zero (due to the latency in the convolver).
1.29 +// Next, the triangular pulse should match the theoretical result to
1.30 +// within some roundoff. After the triangular pulse, the result
1.31 +// should be exactly zero, but round-off prevents that. We make sure
1.32 +// the part after the pulse is sufficiently close to zero. Finally,
1.33 +// the result should be exactly zero because the inputs are exactly
1.34 +// zero.
1.35 +function runTest() {
1.36 + if (window.testRunner) {
1.37 + testRunner.dumpAsText();
1.38 + testRunner.waitUntilDone();
1.39 + }
1.40 +
1.41 + window.jsTestIsAsync = true;
1.42 +
1.43 + // Create offline audio context.
1.44 + var context = new OfflineAudioContext(2, sampleRate * renderLengthSeconds, sampleRate);
1.45 +
1.46 + var squarePulse = createSquarePulseBuffer(context, pulseLengthFrames);
1.47 + var trianglePulse = createTrianglePulseBuffer(context, 2 * pulseLengthFrames);
1.48 +
1.49 + var bufferSource = context.createBufferSource();
1.50 + bufferSource.buffer = squarePulse;
1.51 +
1.52 + var convolver = context.createConvolver();
1.53 + convolver.normalize = false;
1.54 + convolver.buffer = squarePulse;
1.55 +
1.56 + bufferSource.connect(convolver);
1.57 + convolver.connect(context.destination);
1.58 +
1.59 + bufferSource.start(0);
1.60 +
1.61 + context.oncomplete = checkConvolvedResult(trianglePulse);
1.62 + context.startRendering();
1.63 +}
1.64 +
1.65 +function finishJSTest() {
1.66 + SimpleTest.finish();
1.67 +}
1.68 +
1.69 +runTest();
1.70 +successfullyParsed = true;
1.71 +
1.72 +</script>
1.73 +
1.74 +<script src="../fast/js/resources/js-test-post.js"></script>
1.75 +</body>
1.76 +</html>
