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comparison: content/media/webaudio/test/test_channelMergerNodeWithVolume.html
content/media/webaudio/test/test_channelMergerNodeWithVolume.html
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| -1:000000000000 | 0:3b0aff14750a |
|---|---|
| 1 <!DOCTYPE HTML> | |
| 2 <html> | |
| 3 <head> | |
| 4 <title>Test ChannelMergerNode</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"> | |
| 12 | |
| 13 var gTest = { | |
| 14 length: 2048, | |
| 15 numberOfChannels: 8, | |
| 16 createGraph: function(context) { | |
| 17 var buffers = []; | |
| 18 for (var j = 0; j < 4; ++j) { | |
| 19 var buffer = context.createBuffer(2, 2048, context.sampleRate); | |
| 20 for (var i = 0; i < 2048; ++i) { | |
| 21 buffer.getChannelData(0)[i] = Math.sin(440 * 2 * (j + 1) * Math.PI * i / context.sampleRate); | |
| 22 // Second channel is silent | |
| 23 } | |
| 24 buffers.push(buffer); | |
| 25 } | |
| 26 | |
| 27 var merger = context.createChannelMerger(); | |
| 28 is(merger.channelCount, 2, "merger node has 2 input channels by default"); | |
| 29 is(merger.channelCountMode, "max", "Correct channelCountMode for the merger node"); | |
| 30 is(merger.channelInterpretation, "speakers", "Correct channelCountInterpretation for the merger node"); | |
| 31 | |
| 32 for (var i = 0; i < 4; ++i) { | |
| 33 var source = context.createBufferSource(); | |
| 34 source.buffer = buffers[i]; | |
| 35 var gain = context.createGain(); | |
| 36 gain.gain.value = 0.5; | |
| 37 source.connect(gain); | |
| 38 gain.connect(merger, 0, i); | |
| 39 source.start(0); | |
| 40 } | |
| 41 | |
| 42 return merger; | |
| 43 }, | |
| 44 createExpectedBuffers: function(context) { | |
| 45 var expectedBuffer = context.createBuffer(8, 2048, context.sampleRate); | |
| 46 for (var i = 0; i < 4; ++i) { | |
| 47 for (var j = 0; j < 2048; ++j) { | |
| 48 expectedBuffer.getChannelData(i * 2)[j] = Math.sin(440 * 2 * (i + 1) * Math.PI * j / context.sampleRate) / 2; | |
| 49 } | |
| 50 } | |
| 51 return expectedBuffer; | |
| 52 }, | |
| 53 }; | |
| 54 | |
| 55 runTest(); | |
| 56 | |
| 57 </script> | |
| 58 </pre> | |
| 59 </body> | |
| 60 </html> |
