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<!DOCTYPE html>
<html>
<head>
<title>
Test Cascade of Mono Convolvers
</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/webaudio/resources/audit-util.js"></script>
<script src="/webaudio/resources/audit.js"></script>
</head>
<body>
<script id="layout-test-code">
let audit = Audit.createTaskRunner();
// Arbitrary sample rate and reasonably short duration
let sampleRate = 8000;
let duration = 0.25;
let renderFrames = duration * sampleRate;
audit.define(
{label: 'cascade-mono', description: 'Cascaded mono convolvers'},
(task, should) => {
// Cascade two convolvers with mono responses and verify that the
// output is not silent.
let context = new OfflineAudioContext(1, renderFrames, sampleRate);
let b0 =
new AudioBuffer({length: 5, sampleRate: context.sampleRate});
b0.getChannelData(0)[1] = 1;
let c0 = new ConvolverNode(
context, {disableNormalization: true, buffer: b0});
let b1 =
new AudioBuffer({length: 5, sampleRate: context.sampleRate});
b1.getChannelData(0)[2] = 1;
let c1 = new ConvolverNode(
context, {disableNormalization: true, buffer: b1});
let src = new OscillatorNode(context);
src.connect(c0).connect(c1).connect(context.destination);
src.start();
context.startRendering()
.then(audioBuffer => {
// Just verify the output is not silent
let audio = audioBuffer.getChannelData(0);
should(audio, 'Output of cascaded mono convolvers')
.notBeConstantValueOf(0);
})
.then(() => task.done());
});
audit.run();
</script>
</body>
</html>
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