content/media/webaudio/test/test_gainNode.html@44a2da4a2ab2
content/media/webaudio/test/test_gainNode.html
Fri, 16 Jan 2015 04:50:19 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Fri, 16 Jan 2015 04:50:19 +0100
- branch
- TOR_BUG_9701
- changeset 13
- 44a2da4a2ab2
- permissions
- -rw-r--r--
Replace accessor implementation with direct member state manipulation, by
request https://trac.torproject.org/projects/tor/ticket/9701#comment:32
1 <!DOCTYPE HTML>
2 <html>
3 <head>
4 <title>Test GainNode</title>
5 <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
6 <script type="text/javascript" src="webaudio.js"></script>
7 <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
8 </head>
9 <body>
10 <pre id="test">
11 <script class="testbody" type="text/javascript">
13 var gTest = {
14 length: 2048,
15 numberOfChannels: 1,
16 createGraph: function(context) {
17 var buffer = context.createBuffer(1, 2048, context.sampleRate);
18 for (var i = 0; i < 2048; ++i) {
19 buffer.getChannelData(0)[i] = Math.sin(440 * 2 * Math.PI * i / context.sampleRate);
20 }
22 var source = context.createBufferSource();
24 var gain = context.createGain();
26 source.buffer = buffer;
28 source.connect(gain);
30 ok(gain.gain, "The audioparam member must exist");
31 is(gain.gain.value, 1.0, "Correct initial value");
32 is(gain.gain.defaultValue, 1.0, "Correct default value");
33 gain.gain.value = 0.5;
34 is(gain.gain.value, 0.5, "Correct initial value");
35 is(gain.gain.defaultValue, 1.0, "Correct default value");
36 is(gain.channelCount, 2, "gain node has 2 input channels by default");
37 is(gain.channelCountMode, "max", "Correct channelCountMode for the gain node");
38 is(gain.channelInterpretation, "speakers", "Correct channelCountInterpretation for the gain node");
40 source.start(0);
41 return gain;
42 },
43 createExpectedBuffers: function(context) {
44 var expectedBuffer = context.createBuffer(1, 2048, context.sampleRate);
45 for (var i = 0; i < 2048; ++i) {
46 expectedBuffer.getChannelData(0)[i] = Math.sin(440 * 2 * Math.PI * i / context.sampleRate) / 2;
47 }
48 return expectedBuffer;
49 },
50 };
52 runTest();
54 </script>
55 </pre>
56 </body>
57 </html>
