| <!DOCTYPE html> |
| <html> |
| <head> |
| <script> |
| let streamPromise = Promise.resolve(); |
| |
| function promptForCapture() |
| { |
| streamPromise = navigator.mediaDevices.enumerateDevices().then(() => { |
| return navigator.mediaDevices.getUserMedia({ audio: false, video: true }) |
| }); |
| |
| streamPromise.then((stream) => { |
| stream = s; |
| video.srcObject = stream; |
| console.log("Got user media"); |
| }).catch((error) => console.log(`Failed with error: ${error}`)); |
| } |
| |
| function stop(kind) |
| { |
| streamPromise.then((stream) => { |
| let activeTracks = []; |
| stream.getTracks().forEach(track => { |
| if (!kind || track.kind == kind) |
| track.stop(); |
| else |
| activeTracks.push(track); |
| }); |
| |
| if (!activeTracks.length) { |
| streamPromiseDidResolve = false; |
| video.srcObject = null; |
| } |
| }); |
| } |
| |
| let streamPromiseDidResolve = false; |
| |
| function haveStream() |
| { |
| // Our caller polls repeatedly until our promise resolves. |
| streamPromise.then((stream) => streamPromiseDidResolve = !!stream); |
| return streamPromiseDidResolve; |
| } |
| |
| function doMultipleGetUserMediaSynchronously() |
| { |
| navigator.mediaDevices.getUserMedia({video: true}); |
| navigator.mediaDevices.getUserMedia({video: true}); |
| navigator.mediaDevices.getUserMedia({video: true}); |
| |
| // This one should prompt. |
| navigator.mediaDevices.getUserMedia({audio: true}); |
| |
| navigator.mediaDevices.getUserMedia({audio: true}); |
| navigator.mediaDevices.getUserMedia({audio: true}); |
| navigator.mediaDevices.getUserMedia({audio: true, video: true}); |
| } |
| |
| function captureAudio() |
| { |
| streamPromise = navigator.mediaDevices.getUserMedia({audio: true}); |
| } |
| |
| function captureAudioAndVideo() |
| { |
| streamPromise = navigator.mediaDevices.getUserMedia({audio: true, video: true}); |
| } |
| </script> |
| <head> |
| |
| <body onload="promptForCapture()"> |
| <video id="video" controls></video> |
| <p> |
| <button onclick="stop()">Stop</button> |
| </p> |
| </body> |
| </html> |
