mirror of
https://github.com/servo/servo.git
synced 2025-07-16 03:43:38 +01:00
74 lines
2.8 KiB
HTML
74 lines
2.8 KiB
HTML
<!DOCTYPE html>
|
|
<html>
|
|
<head>
|
|
<title>Test setValueAtTime with startTime in the past</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>
|
|
<script src="retrospective-test.js"></script>
|
|
</head>
|
|
<body>
|
|
<script>
|
|
let audit = Audit.createTaskRunner();
|
|
|
|
audit.define(
|
|
{
|
|
label: 'test',
|
|
description: 'Test setValueAtTime with startTime in the past'
|
|
},
|
|
(task, should) => {
|
|
let {context, source, test, reference} = setupRetrospectiveGraph();
|
|
|
|
// Suspend the context at this frame so we can synchronously set up
|
|
// automations.
|
|
const suspendFrame = 128;
|
|
|
|
// Use a ramp of slope 1 per frame to measure time.
|
|
// The end value is the extent of exact precision in single
|
|
// precision float.
|
|
const rampEnd = context.length - suspendFrame;
|
|
const rampEndSeconds = context.length / context.sampleRate;
|
|
|
|
context.suspend(suspendFrame / context.sampleRate)
|
|
.then(() => {
|
|
// Call setValueAtTime with a time in the past
|
|
test.gain.setValueAtTime(0.0, 0.5 * context.currentTime);
|
|
test.gain.linearRampToValueAtTime(rampEnd, rampEndSeconds);
|
|
|
|
reference.gain.setValueAtTime(0.0, context.currentTime);
|
|
reference.gain.linearRampToValueAtTime(
|
|
rampEnd, rampEndSeconds);
|
|
})
|
|
.then(() => context.resume());
|
|
|
|
source.start();
|
|
|
|
context.startRendering()
|
|
.then(resultBuffer => {
|
|
let testValue = resultBuffer.getChannelData(0);
|
|
let referenceValue = resultBuffer.getChannelData(1);
|
|
|
|
// Until the suspendFrame, both should be exactly equal to 1.
|
|
should(
|
|
testValue.slice(0, suspendFrame),
|
|
`Test[0:${suspendFrame - 1}]`)
|
|
.beConstantValueOf(1);
|
|
should(
|
|
referenceValue.slice(0, suspendFrame),
|
|
`Reference[0:${suspendFrame - 1}]`)
|
|
.beConstantValueOf(1);
|
|
|
|
// After the suspendFrame, both should be equal (and not
|
|
// constant)
|
|
should(
|
|
testValue.slice(suspendFrame), `Test[${suspendFrame}:]`)
|
|
.beEqualToArray(referenceValue.slice(suspendFrame));
|
|
})
|
|
.then(() => task.done());
|
|
});
|
|
|
|
audit.run();
|
|
</script>
|
|
</body>
|
|
</html>
|