content/media/webaudio/test/test_bug956489.html@6474c204b198
content/media/webaudio/test/test_bug956489.html
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
1 <!DOCTYPE HTML>
2 <html>
3 <head>
4 <title>Test when and currentTime are in the same coordinate system</title>
5 <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
6 <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
7 </head>
8 <body>
9 <pre id="test">
10 <script class="testbody" type="text/javascript">
12 SimpleTest.waitForExplicitFinish();
13 addLoadEvent(function() {
14 var freq = 330;
16 var context = new AudioContext();
18 var buffer = context.createBuffer(1, context.sampleRate / freq, context.sampleRate);
19 for (var i = 0; i < buffer.length; ++i) {
20 buffer.getChannelData(0)[i] = Math.sin(2 * Math.PI * i / buffer.length);
21 }
23 var source = context.createBufferSource();
24 source.loop = true;
25 source.buffer = buffer;
27 setTimeout(function () {
28 var finished = false;
30 source.start(context.currentTime);
31 var processor = context.createScriptProcessor(256, 1, 1);
32 processor.onaudioprocess = function (e) {
33 if (finished) return;
34 var c = e.inputBuffer.getChannelData(0);
35 var result = true;
37 for (var i = 0; i < buffer.length; ++i) {
38 if (Math.abs(c[i] - buffer.getChannelData(0)[i]) > 1e-9) {
39 result = false;
40 break;
41 }
42 }
43 finished = true;
44 ok(result, "when and currentTime are in same time coordinate system");
45 SimpleTest.finish();
46 }
47 processor.connect(context.destination);
48 source.connect(processor);
49 }, 500);
50 });
52 </script>
53 </pre>
54 </body>
55 </html>
