blob: 904b14bede544ac63a08dc422df63fb59d53c048 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Test AnalyserNode when the input is scaled</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
setup({ single_test: true });
var context = new AudioContext();
var gain = context.createGain();
var analyser = context.createAnalyser();
var osc = context.createOscillator();
osc.connect(gain);
gain.connect(analyser);
osc.start();
var array = new Uint8Array(analyser.frequencyBinCount);
function getAnalyserData() {
gain.gain.setValueAtTime(currentGain, context.currentTime);
analyser.getByteTimeDomainData(array);
var inrange = true;
var max = -1;
for (var i = 0; i < array.length; i++) {
if (array[i] > max) {
max = Math.abs(array[i] - 128);
}
}
if (max <= currentGain * 128) {
assert_true(true, "Analyser got scaled data for " + currentGain);
currentGain = tests.shift();
if (currentGain == undefined) {
done();
return;
}
}
requestAnimationFrame(getAnalyserData);
}
var tests = [1.0, 0.5, 0.0];
var currentGain = tests.shift();
requestAnimationFrame(getAnalyserData);
</script>
</head>
</body>
</html>
|
