content/media/webaudio/test/test_audioParamSetCurveAtTime.html@6474c204b198
content/media/webaudio/test/test_audioParamSetCurveAtTime.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 AudioParam.linearRampToValue</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 T0 = 0;
15 var gTest = {
16 length: 2048,
17 numberOfChannels: 1,
18 createGraph: function(context) {
19 var sourceBuffer = context.createBuffer(1, 2048, context.sampleRate);
20 for (var i = 0; i < 2048; ++i) {
21 sourceBuffer.getChannelData(0)[i] = 1;
22 }
24 var source = context.createBufferSource();
25 source.buffer = sourceBuffer;
27 var gain = context.createGain();
28 gain.gain.setValueCurveAtTime(this.curve, T0, this.duration);
30 source.connect(gain);
32 source.start(0);
33 return gain;
34 },
35 createExpectedBuffers: function(context) {
36 this.duration = 1024 / context.sampleRate;
37 this.curve = new Float32Array(100);
38 for (var i = 0; i < 100; ++i) {
39 this.curve[i] = Math.sin(440 * 2 * Math.PI * i / context.sampleRate);
40 }
41 var expectedBuffer = context.createBuffer(1, 2048, context.sampleRate);
42 for (var i = 0; i < 2048; ++i) {
43 var t = i / context.sampleRate;
44 expectedBuffer.getChannelData(0)[i] = this.curve[Math.min(99, Math.floor(100 * Math.min(1.0, (t - T0) / this.duration)))];
45 }
46 return expectedBuffer;
47 },
48 };
50 runTest();
52 </script>
53 </pre>
54 </body>
55 </html>
