<!DOCTYPE HTML> <html> <meta charset="utf-8"> <head> <title>Test MediaStreamTrackAudioSourceNode processing is correct</title> <script 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"> function createBuffer(context) { let buffer = context.createBuffer(2, 2048, context.sampleRate); for (let i = 0; i < 2048; ++i) { buffer.getChannelData(0)[i] = Math.sin(440 * 2 * Math.PI * i / context.sampleRate); buffer.getChannelData(1)[i] = -buffer.getChannelData(0)[i]; } return buffer; } let gTest = { length: 2048, skipOfflineContextTests: true, createGraph(context) { let sourceGraph = new AudioContext(); let source = sourceGraph.createBufferSource(); source.buffer = createBuffer(context); let dest = sourceGraph.createMediaStreamDestination(); source.connect(dest); // Extract first audio track from dest.stream let track = dest.stream.getAudioTracks()[0]; source.start(0); let mediaStreamTrackSource = new MediaStreamTrackAudioSourceNode(context, { mediaStreamTrack: track }); // channelCount and channelCountMode should have no effect mediaStreamTrackSource.channelCount = 1; mediaStreamTrackSource.channelCountMode = "explicit"; return mediaStreamTrackSource; }, createExpectedBuffers(context) { return createBuffer(context); }, }; runTest(); </script> </pre> </body> </html>