content/media/webaudio/test/test_audioParamSetCurveAtTime.html@b8a032363ba2 (annotated)
content/media/webaudio/test/test_audioParamSetCurveAtTime.html
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
| michael@0 | 1 | <!DOCTYPE HTML> |
| michael@0 | 2 | <html> |
| michael@0 | 3 | <head> |
| michael@0 | 4 | <title>Test AudioParam.linearRampToValue</title> |
| michael@0 | 5 | <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script> |
| michael@0 | 6 | <script type="text/javascript" src="webaudio.js"></script> |
| michael@0 | 7 | <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" /> |
| michael@0 | 8 | </head> |
| michael@0 | 9 | <body> |
| michael@0 | 10 | <pre id="test"> |
| michael@0 | 11 | <script class="testbody" type="text/javascript"> |
| michael@0 | 12 | |
| michael@0 | 13 | var T0 = 0; |
| michael@0 | 14 | |
| michael@0 | 15 | var gTest = { |
| michael@0 | 16 | length: 2048, |
| michael@0 | 17 | numberOfChannels: 1, |
| michael@0 | 18 | createGraph: function(context) { |
| michael@0 | 19 | var sourceBuffer = context.createBuffer(1, 2048, context.sampleRate); |
| michael@0 | 20 | for (var i = 0; i < 2048; ++i) { |
| michael@0 | 21 | sourceBuffer.getChannelData(0)[i] = 1; |
| michael@0 | 22 | } |
| michael@0 | 23 | |
| michael@0 | 24 | var source = context.createBufferSource(); |
| michael@0 | 25 | source.buffer = sourceBuffer; |
| michael@0 | 26 | |
| michael@0 | 27 | var gain = context.createGain(); |
| michael@0 | 28 | gain.gain.setValueCurveAtTime(this.curve, T0, this.duration); |
| michael@0 | 29 | |
| michael@0 | 30 | source.connect(gain); |
| michael@0 | 31 | |
| michael@0 | 32 | source.start(0); |
| michael@0 | 33 | return gain; |
| michael@0 | 34 | }, |
| michael@0 | 35 | createExpectedBuffers: function(context) { |
| michael@0 | 36 | this.duration = 1024 / context.sampleRate; |
| michael@0 | 37 | this.curve = new Float32Array(100); |
| michael@0 | 38 | for (var i = 0; i < 100; ++i) { |
| michael@0 | 39 | this.curve[i] = Math.sin(440 * 2 * Math.PI * i / context.sampleRate); |
| michael@0 | 40 | } |
| michael@0 | 41 | var expectedBuffer = context.createBuffer(1, 2048, context.sampleRate); |
| michael@0 | 42 | for (var i = 0; i < 2048; ++i) { |
| michael@0 | 43 | var t = i / context.sampleRate; |
| michael@0 | 44 | expectedBuffer.getChannelData(0)[i] = this.curve[Math.min(99, Math.floor(100 * Math.min(1.0, (t - T0) / this.duration)))]; |
| michael@0 | 45 | } |
| michael@0 | 46 | return expectedBuffer; |
| michael@0 | 47 | }, |
| michael@0 | 48 | }; |
| michael@0 | 49 | |
| michael@0 | 50 | runTest(); |
| michael@0 | 51 | |
| michael@0 | 52 | </script> |
| michael@0 | 53 | </pre> |
| michael@0 | 54 | </body> |
| michael@0 | 55 | </html> |
