| <script> |
| async function checkDeviceKind(kind) |
| { |
| try { |
| let devices = await navigator.mediaDevices.enumerateDevices(); |
| for (let device of devices) { |
| if (device.kind === kind) |
| return true; |
| } |
| } catch (e) { |
| } |
| return false; |
| } |
| |
| async function checkSpeakerSelection() |
| { |
| // Speakers are currently only exposed after getUserMedia. |
| try { |
| await navigator.mediaDevices.getUserMedia({ audio : true }); |
| } catch (e) { |
| } |
| try { |
| await navigator.mediaDevices.getUserMedia({ video : true }); |
| } catch (e) { |
| } |
| return checkDeviceKind('audiooutput'); |
| } |
| |
| async function enumerate() |
| { |
| let visible = []; |
| if (await checkDeviceKind('videoinput')) |
| visible.push('camera'); |
| if (await checkDeviceKind('audioinput')) |
| visible.push('microphone'); |
| if (await checkSpeakerSelection()) |
| visible.push('speakerselection'); |
| |
| visible = visible.join('+'); |
| parent.postMessage(visible, '*'); |
| result.innerHTML = 'result: "' + visible + '"'; |
| } |
| |
| window.addEventListener("message", enumerate); |
| </script> |
| |
| <div id='result'></div> |
| |
| |
