content/media/webaudio/test/test_channelMergerNodeWithVolume.html@6474c204b198 (annotated)
content/media/webaudio/test/test_channelMergerNodeWithVolume.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.
| michael@0 | 1 | <!DOCTYPE HTML> |
| michael@0 | 2 | <html> |
| michael@0 | 3 | <head> |
| michael@0 | 4 | <title>Test ChannelMergerNode</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 gTest = { |
| michael@0 | 14 | length: 2048, |
| michael@0 | 15 | numberOfChannels: 8, |
| michael@0 | 16 | createGraph: function(context) { |
| michael@0 | 17 | var buffers = []; |
| michael@0 | 18 | for (var j = 0; j < 4; ++j) { |
| michael@0 | 19 | var buffer = context.createBuffer(2, 2048, context.sampleRate); |
| michael@0 | 20 | for (var i = 0; i < 2048; ++i) { |
| michael@0 | 21 | buffer.getChannelData(0)[i] = Math.sin(440 * 2 * (j + 1) * Math.PI * i / context.sampleRate); |
| michael@0 | 22 | // Second channel is silent |
| michael@0 | 23 | } |
| michael@0 | 24 | buffers.push(buffer); |
| michael@0 | 25 | } |
| michael@0 | 26 | |
| michael@0 | 27 | var merger = context.createChannelMerger(); |
| michael@0 | 28 | is(merger.channelCount, 2, "merger node has 2 input channels by default"); |
| michael@0 | 29 | is(merger.channelCountMode, "max", "Correct channelCountMode for the merger node"); |
| michael@0 | 30 | is(merger.channelInterpretation, "speakers", "Correct channelCountInterpretation for the merger node"); |
| michael@0 | 31 | |
| michael@0 | 32 | for (var i = 0; i < 4; ++i) { |
| michael@0 | 33 | var source = context.createBufferSource(); |
| michael@0 | 34 | source.buffer = buffers[i]; |
| michael@0 | 35 | var gain = context.createGain(); |
| michael@0 | 36 | gain.gain.value = 0.5; |
| michael@0 | 37 | source.connect(gain); |
| michael@0 | 38 | gain.connect(merger, 0, i); |
| michael@0 | 39 | source.start(0); |
| michael@0 | 40 | } |
| michael@0 | 41 | |
| michael@0 | 42 | return merger; |
| michael@0 | 43 | }, |
| michael@0 | 44 | createExpectedBuffers: function(context) { |
| michael@0 | 45 | var expectedBuffer = context.createBuffer(8, 2048, context.sampleRate); |
| michael@0 | 46 | for (var i = 0; i < 4; ++i) { |
| michael@0 | 47 | for (var j = 0; j < 2048; ++j) { |
| michael@0 | 48 | expectedBuffer.getChannelData(i * 2)[j] = Math.sin(440 * 2 * (i + 1) * Math.PI * j / context.sampleRate) / 2; |
| michael@0 | 49 | } |
| michael@0 | 50 | } |
| michael@0 | 51 | return expectedBuffer; |
| michael@0 | 52 | }, |
| michael@0 | 53 | }; |
| michael@0 | 54 | |
| michael@0 | 55 | runTest(); |
| michael@0 | 56 | |
| michael@0 | 57 | </script> |
| michael@0 | 58 | </pre> |
| michael@0 | 59 | </body> |
| michael@0 | 60 | </html> |
