test_bug972678.html (1774B)
1 <!DOCTYPE HTML> 2 <html> 3 <head> 4 <title>Test buffers do not interfere when scheduled in sequence</title> 5 <script 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 var OFFSETS = [0.005, 0.01, 0.02, 0.03]; 13 var LENGTH = 128; 14 15 var gTest = { 16 length: 128 * OFFSETS.length, 17 numberOfChannels: 1, 18 19 createGraph(context) { 20 var gain = context.createGain(); 21 22 // create a repeating sample 23 var repeatingSample = context.createBuffer(1, 2, context.sampleRate); 24 var c = repeatingSample.getChannelData(0); 25 for (var i = 0; i < repeatingSample.length; ++i) { 26 c[i] = i % 2 == 0 ? 1 : -1; 27 } 28 29 OFFSETS.forEach(function (offset, offsetIdx) { 30 // Schedule a set of nodes to repeat the sample. 31 for (var i = 0; i < LENGTH; i += repeatingSample.length) { 32 var source = context.createBufferSource(); 33 source.buffer = repeatingSample; 34 source.connect(gain); 35 source.start((offsetIdx * LENGTH + i + offset) / context.sampleRate); 36 } 37 38 let buffer = context.createBuffer(1, LENGTH, context.sampleRate); 39 c = buffer.getChannelData(0); 40 for (var i = 0; i < buffer.length; ++i) { 41 c[i] = i % 2 == 0 ? -1 : 1; 42 } 43 44 var source = context.createBufferSource(); 45 source.buffer = buffer; 46 source.connect(gain); 47 source.start((offsetIdx * LENGTH + offset) / context.sampleRate); 48 }); 49 50 return gain; 51 }, 52 53 createExpectedBuffers(context) { 54 return context.createBuffer(1, gTest.length, context.sampleRate); 55 }, 56 }; 57 58 runTest(); 59 </script> 60 </pre> 61 </body> 62 </html>