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
52
|
<!DOCTYPE html>
<html>
<head>
<title>
Test AudioBufferSourceNode With Looping And Duration
</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>
</head>
<body>
<script id="layout-test-code">
let audit = Audit.createTaskRunner();
audit.define('loop with duration', (task, should) => {
// Create the context
let context = new OfflineAudioContext(1, 4096, 48000);
// Create the sample buffer and fill the second half with 1
let buffer = context.createBuffer(1, 2048, context.sampleRate);
for (let i = 1024; i < 2048; i++) {
buffer.getChannelData(0)[i] = 1;
}
// Create the source and set its value
let source = context.createBufferSource();
source.loop = true;
source.loopStart = 1024 / context.sampleRate;
source.loopEnd = 2048 / context.sampleRate;
source.buffer = buffer;
source.connect(context.destination);
source.start(0, 1024 / context.sampleRate, 2048 / context.sampleRate);
// Expectations
let expected = new Float32Array(4096);
for (let i = 0; i < 2048; i++) {
expected[i] = 1;
}
// Render it!
context.startRendering()
.then(function(audioBuffer) {
should(
audioBuffer.getChannelData(0), 'audioBuffer.getChannelData')
.beEqualToArray(expected);
})
.then(task.done());
});
audit.run();
</script>
</body>
</html>
|
