content/media/webaudio/test/test_dynamicsCompressorNode.html@6474c204b198
content/media/webaudio/test/test_dynamicsCompressorNode.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 DynamicsCompressorNode</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 function near(a, b, msg) {
13 ok(Math.abs(a - b) < 1e-4, msg);
14 }
16 SimpleTest.waitForExplicitFinish();
17 addLoadEvent(function() {
18 var context = new AudioContext();
19 var buffer = context.createBuffer(1, 2048, context.sampleRate);
20 for (var i = 0; i < 2048; ++i) {
21 buffer.getChannelData(0)[i] = Math.sin(440 * 2 * Math.PI * i / context.sampleRate);
22 }
24 var destination = context.destination;
26 var source = context.createBufferSource();
28 var compressor = context.createDynamicsCompressor();
30 source.buffer = buffer;
32 source.connect(compressor);
33 compressor.connect(destination);
35 is(compressor.channelCount, 2, "compressor node has 2 input channels by default");
36 is(compressor.channelCountMode, "explicit", "Correct channelCountMode for the compressor node");
37 is(compressor.channelInterpretation, "speakers", "Correct channelCountInterpretation for the compressor node");
39 // Verify default values
40 with (compressor) {
41 near(threshold.defaultValue, -24, "Correct default value for threshold");
42 near(knee.defaultValue, 30, "Correct default value for knee");
43 near(ratio.defaultValue, 12, "Correct default value for ratio");
44 near(reduction.defaultValue, 0, "Correct default value for reduction");
45 near(attack.defaultValue, 0.003, "Correct default value for attack");
46 near(release.defaultValue, 0.25, "Correct default value for release");
47 }
49 source.start(0);
50 SimpleTest.executeSoon(function() {
51 source.stop(0);
52 source.disconnect();
53 compressor.disconnect();
55 SimpleTest.finish();
56 });
57 });
59 </script>
60 </pre>
61 </body>
62 </html>
