blob: 60cce73d99a8fe68566a5c7d795c1d087a94c6f7 [file] [log] [blame]
<!DOCTYPE html>
<html>
<head>
<script src="../resources/js-test.js"></script>
<script src="resources/audio-testing.js"></script>
</head>
<body>
<div id="description"></div>
<div id="console"></div>
<script>
description("This tests that we don't trigger an assertion failure due to AudioNode connection order.");
var sampleRate = 44100.0;
var renderLengthSeconds = 0.125;
var delayTimeSeconds = 0.1;
function createSinWaveBuffer(context, lengthInSeconds, frequency) {
var audioBuffer = context.createBuffer(1, lengthInSeconds * sampleRate, sampleRate);
var n = audioBuffer.length;
var data = audioBuffer.getChannelData(0);
for (var i = 0; i < n; ++i) {
data[i] = Math.sin(frequency * 2 * Math.PI * i / sampleRate);
}
return audioBuffer;
}
function runTest() {
window.jsTestIsAsync = true;
// Create offline audio context.
var context = new webkitOfflineAudioContext(1, sampleRate * renderLengthSeconds, sampleRate);
var toneBuffer = createSinWaveBuffer(context, renderLengthSeconds, 880);
var bufferSource = context.createBufferSource();
bufferSource.buffer = toneBuffer;
bufferSource.connect(context.destination);
var delay = context.createDelay();
delay.delayTime.value = delayTimeSeconds;
// We connect delay node to gain node before anything is connected to delay node itself.
// We do this because we try to trigger the ASSERT which might be fired due to AudioNode connection order,
// especially when gain node and delay node is involved e.g. https://bugs.webkit.org/show_bug.cgi?id=76685.
var gain = context.createGain();
gain.connect(context.destination);
delay.connect(gain);
bufferSource.start(0);
context.oncomplete = finishJSTest;
context.startRendering();
}
runTest();
</script>
</body>
</html>