test_convolverNodeChannelCount.html (1896B)
1 <!DOCTYPE HTML> 2 <html> 3 <head> 4 <title>Test ConvolverNode channel count</title> 5 <script src="/tests/SimpleTest/SimpleTest.js"></script> 6 <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" /> 7 </head> 8 <body> 9 <pre id="test"> 10 <script src="webaudio.js" type="text/javascript"></script> 11 <script class="testbody" type="text/javascript"> 12 13 const signalLength = 2048; 14 const responseLength = 1000; 15 const outputLength = 2048; // < signalLength + responseLength to test bug 910171 16 17 var gTest = { 18 length: outputLength, 19 numberOfChannels: 2, 20 createGraph(context) { 21 var buffer = context.createBuffer(2, signalLength, context.sampleRate); 22 for (var i = 0; i < signalLength; ++i) { 23 var sample = Math.sin(440 * 2 * Math.PI * i / context.sampleRate); 24 // When mixed into a single channel, this produces silence 25 buffer.getChannelData(0)[i] = sample; 26 buffer.getChannelData(1)[i] = -sample; 27 } 28 29 var response = context.createBuffer(2, responseLength, context.sampleRate); 30 for (var i = 0; i < responseLength; ++i) { 31 response.getChannelData(0)[i] = i / responseLength; 32 response.getChannelData(1)[i] = 1 - (i / responseLength); 33 } 34 35 var convolver = context.createConvolver(); 36 convolver.buffer = response; 37 convolver.channelCount = 1; 38 39 expectException(function() { convolver.channelCount = 3; }, 40 DOMException.NOT_SUPPORTED_ERR); 41 convolver.channelCountMode = "explicit"; 42 expectException(function() { convolver.channelCountMode = "max"; }, 43 DOMException.NOT_SUPPORTED_ERR); 44 convolver.channelInterpretation = "discrete"; 45 convolver.channelInterpretation = "speakers"; 46 47 var source = context.createBufferSource(); 48 source.buffer = buffer; 49 source.connect(convolver); 50 source.start(0); 51 52 return convolver; 53 }, 54 }; 55 56 runTest(); 57 58 </script> 59 </pre> 60 </body> 61 </html>