<!DOCTYPE HTML> <html> <head> <title>Test AudioBufferSourceNode looping</title> <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script> <script type="text/javascript" src="webaudio.js"></script> <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" /> </head> <body> <pre id="test"> <script class="testbody" type="text/javascript"> var gTest = { length: 2048 * 4, numberOfChannels: 1, createGraph: function(context) { var buffer = context.createBuffer(1, 2048, context.sampleRate); for (var i = 0; i < 2048; ++i) { buffer.getChannelData(0)[i] = Math.sin(440 * 2 * Math.PI * i / context.sampleRate); } var source = context.createBufferSource(); source.buffer = buffer; source.start(0); source.loop = true; source.loopStart = buffer.duration * 0.25; source.loopEnd = buffer.duration * 0.75; return source; }, createExpectedBuffers: function(context) { var expectedBuffer = context.createBuffer(1, 2048 * 4, context.sampleRate); for (var i = 0; i < 1536; ++i) { expectedBuffer.getChannelData(0)[i] = Math.sin(440 * 2 * Math.PI * i / context.sampleRate); } for (var i = 0; i < 6; ++i) { for (var j = 512; j < 1536; ++j) { expectedBuffer.getChannelData(0)[1536 + i * 1024 + j - 512] = Math.sin(440 * 2 * Math.PI * j / context.sampleRate); } } for (var j = 7680; j < 2048 * 4; ++j) { expectedBuffer.getChannelData(0)[j] = Math.sin(440 * 2 * Math.PI * (j - 7168) / context.sampleRate); } return expectedBuffer; }, }; runTest(); </script> </pre> </body> </html>