| <!DOCTYPE html> |
| <html> |
| <head> |
| <script> |
| async function capture() |
| { |
| try { |
| const stream = await navigator.mediaDevices.getUserMedia({ audio: true, video: false }); |
| internals.setMockAudioTrackChannelNumber(stream.getAudioTracks()[0], 2); |
| |
| var audioContext = new webkitAudioContext(); |
| var analyzer = audioContext.createAnalyser(); |
| analyzer.fftSize = 256; |
| let source = audioContext.createMediaStreamSource(stream); |
| source.connect(analyzer); |
| analyzer.connect(audioContext.destination); |
| |
| for (let cptr = 0; cptr < 1000; cptr++) { |
| internals.setMockAudioTrackChannelNumber(stream.getAudioTracks()[0], (cptr % 2) ? 1 : 2); |
| await new Promise(resolve => setTimeout(resolve, 20)); |
| } |
| |
| source.disconnect(analyzer); |
| analyzer.disconnect(audioContext.destination); |
| |
| window.webkit.messageHandlers.gum.postMessage("PASS"); |
| } catch (e) { |
| window.webkit.messageHandlers.gum.postMessage("FAIL: " + e); |
| } |
| } |
| </script> |
| <head> |
| |
| <body onload="capture()"> |
| </body> |
| </html> |
