const signalLength = 100;
const bufferSize = 1024;
// Delay should be long enough to allow CC to run
const delayBufferCount = 50;
const delayLength = delayBufferCount * bufferSize + 700;
var count = 0;
function applySignal(buffer, offset) {
for (var i = 0; i < signalLength; ++i) {
buffer.getChannelData(0)[offset + i] = Math.cos(Math.PI * i / signalLength);
}
}
function onAudioProcess(e) {
switch(count) {
case 5:
SpecialPowers.forceGC();
SpecialPowers.forceCC();
break;
case delayBufferCount: var offset = delayLength - count * bufferSize; var ctx = e.target.context; var expected = ctx.createBuffer(1, bufferSize, ctx.sampleRate);
applySignal(expected, offset);
compareBuffers(e.inputBuffer, expected);
SimpleTest.finish();
}
count++;
}
function startTest() { var ctx = new AudioContext(); var processor = ctx.createScriptProcessor(bufferSize, 1, 0);
processor.onaudioprocess = onAudioProcess;
// Switch on delay at a time in the future. var delayDuration = delayLength / ctx.sampleRate; var delayStartTime = (delayLength - bufferSize) / ctx.sampleRate; var delay = ctx.createDelay(delayDuration);
delay.delayTime.setValueAtTime(delayDuration, delayStartTime);
delay.connect(processor);
// Short signal that finishes before switching to long delay var buffer = ctx.createBuffer(1, signalLength, ctx.sampleRate);
applySignal(buffer, 0); varsource = ctx.createBufferSource(); source.buffer = buffer; source.start(); source.connect(delay);
};
startTest();
</script>
</pre>
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(vorverarbeitet am 2026-06-10)
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