test_mediaStreamAudioSourceNodePassThrough.html (1690B)
1 <!DOCTYPE HTML> 2 <html> 3 <meta charset="utf-8"> 4 <head> 5 <title>Test MediaStreamAudioSourceNode passthrough</title> 6 <script src="/tests/SimpleTest/SimpleTest.js"></script> 7 <script type="text/javascript" src="webaudio.js"></script> 8 <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" /> 9 </head> 10 <body> 11 <pre id="test"> 12 <script class="testbody" type="text/javascript"> 13 14 function createBuffer(context, delay) { 15 var buffer = context.createBuffer(2, 2048, context.sampleRate); 16 for (var i = 0; i < 2048 - delay; ++i) { 17 buffer.getChannelData(0)[i + delay] = Math.sin(440 * 2 * Math.PI * i / context.sampleRate); 18 buffer.getChannelData(1)[i + delay] = -buffer.getChannelData(0)[i + delay]; 19 } 20 return buffer; 21 } 22 23 var gTest = { 24 length: 2048, 25 skipOfflineContextTests: true, 26 createGraph(context) { 27 var sourceGraph = new AudioContext(); 28 var source = sourceGraph.createBufferSource(); 29 source.buffer = createBuffer(context, 0); 30 var dest = sourceGraph.createMediaStreamDestination(); 31 source.connect(dest); 32 source.start(0); 33 34 var mediaStreamSource = context.createMediaStreamSource(dest.stream); 35 // channelCount and channelCountMode should have no effect 36 mediaStreamSource.channelCount = 1; 37 mediaStreamSource.channelCountMode = "explicit"; 38 39 var srcWrapped = SpecialPowers.wrap(mediaStreamSource); 40 ok("passThrough" in srcWrapped, "MediaStreamAudioSourceNode should support the passThrough API"); 41 srcWrapped.passThrough = true; 42 43 return mediaStreamSource; 44 }, 45 createExpectedBuffers(context) { 46 return context.createBuffer(2, 2048, context.sampleRate); 47 }, 48 }; 49 50 runTest(); 51 52 </script> 53 </pre> 54 </body> 55 </html>