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<!doctype html>
<html>
<head>
<script src="../resources/js-test.js"></script>
<script src="resources/compatibility.js"></script>
<script src="resources/audio-testing.js"></script>
</head>
<body>
<script>
description('Basic test for OfflineAudioContext.suspend() and OfflineAudioContext.resume().');
window.jsTestIsAsync = true;
var sampleRate = 44100;
var renderDuration = 1;
var renderQuantum = 128;
var audit = Audit.createTaskRunner();
// Task: Calling suspend with no argument, negative time or the time
// beyond the maximum render duration reject the promise.
audit.defineTask('suspend-invalid-argument', function (done) {
var context = new OfflineAudioContext(1, sampleRate * renderDuration, sampleRate);
Should('context.suspend()', context.suspend()).beRejected();
Should('context.suspend(-1.0)', context.suspend(-1.0)).beRejected();
Should('context.suspend(2.0)', context.suspend(2.0)).beRejected();
context.startRendering().then(done);
});
// Task: Scheduling a suspend in the past should be rejected.
audit.defineTask('suspend-in-the-past', function (done) {
var context = new OfflineAudioContext(1, sampleRate * renderDuration, sampleRate);
context.suspend(0.5).then(function () {
Should('Scheduling a suspend in the past',
context.suspend(context.currentTime - 0.1)).beRejected();
Should('Scheduling a suspend in the future',
context.suspend(context.currentTime + 0.1).then(function () {
context.resume();
})).beResolved();
context.resume();
});
context.startRendering().then(done);
});
// Task: Calling multiple suspends at the same rendering quantum should
// reject the promise.
audit.defineTask('identical-suspend-time', function (done) {
var context = new OfflineAudioContext(1, sampleRate * renderDuration, sampleRate);
// |suspendTime1| and |suspendTime2| are identical when quantized to
// the render quantum size.
var suspendTime1 = renderQuantum / sampleRate;
var suspendTime2 = 1.5 * renderQuantum / sampleRate;
context.suspend(suspendTime1).then(function () {
context.resume();
});
// Printing out the pass message to be more informative here.
testPassed('Scheduling a suspend at frame ' + suspendTime1 * sampleRate + ' was successful.');
Should('Scheduling another suspend at the same rendering quantum',
context.suspend(suspendTime2)).beRejected();
context.startRendering().then(done);
});
// Task: Resuming a running context should be resolved.
audit.defineTask('resume-before-suspend', function (done) {
// Make the render length 5 times longer to minimize the flakiness.
var longRenderDuration = renderDuration * 5;
var context = new OfflineAudioContext(1, sampleRate * longRenderDuration, sampleRate);
// Create dummy audio graph to slow the rendering.
var osc = context.createOscillator();
var lpf = context.createBiquadFilter();
osc.type = 'sawtooth';
osc.frequency.setValueAtTime(0.1, 0.0);
osc.frequency.linearRampToValueAtTime(1000, longRenderDuration * 0.5);
osc.frequency.linearRampToValueAtTime(0.1, longRenderDuration);
lpf.frequency.setValueAtTime(0.1, 0.0);
lpf.frequency.linearRampToValueAtTime(1000, longRenderDuration * 0.5);
lpf.frequency.linearRampToValueAtTime(0.1, longRenderDuration);
osc.connect(lpf);
lpf.connect(context.destination);
osc.start();
// A suspend is scheduled at the 90% of the render duration.
context.suspend(longRenderDuration * 0.9).then(done);
testPassed('Scheduling a suspend at ' + longRenderDuration * 0.9 + ' seconds.');
// We have to start rendering to get the time running.
context.startRendering();
// Then call resume() immediately after the rendering starts. Resuming
// a context that is already running should be resolved.
Should('Resuming a running context', context.resume())
.beResolved();
});
// Task: Calling resume on a context that is not started should reject the promise.
audit.defineTask('resume-without-suspend', function (done) {
var context = new OfflineAudioContext(1, sampleRate * renderDuration, sampleRate);
Should('Resuming a context without starting it', context.resume())
.beRejected().then(done);
});
audit.defineTask('finish', function (done) {
finishJSTest();
done();
});
audit.runTasks(
'suspend-invalid-argument',
'suspend-in-the-past',
'identical-suspend-time',
'resume-before-suspend',
'resume-without-suspend',
'finish'
);
successfullyParsed = true;
</script>
</body>
</html>