CameraView: only request microphone permission when CaptureMode is se…

…t to Video in UWP (#1963)

CameraView: only request microphone permission when CaptureMode is set to Video

Co-authored-by: Gerald Versluis <gerald.versluis@microsoft.com>

src/CommunityToolkit/Xamarin.CommunityToolkit/Views/CameraView/UWP/CameraViewRenderer.uwp.cs

@@ -245,6 +245,7 @@ protected override async void OnElementPropertyChanged(object? sender, PropertyC
  switch (e.PropertyName)
  {
  case nameof(CameraView.CameraOptions):
+ case nameof(CameraView.CaptureMode):
  await CleanupCameraAsync();
  await InitializeCameraAsync();
  break;
@@ -333,8 +334,12 @@ async Task InitializeCameraAsync()
  return;
  }
 
- var audioDevice = await DeviceInformation.FindAllAsync(DeviceClass.AudioCapture);
- var selectedAudioDevice = audioDevice.Count == 0 ? null : audioDevice[0].Id;
+ string? selectedAudioDevice = null;
+ if (Element.CaptureMode == CameraCaptureMode.Video)
+ {
+ var audioDevice = await DeviceInformation.FindAllAsync(DeviceClass.AudioCapture);
+ selectedAudioDevice = audioDevice.Count == 0 ? null : audioDevice[0].Id;
+ }
 
  mediaCapture = new MediaCapture();
  try
@@ -345,7 +350,7 @@ async Task InitializeCameraAsync()
  MediaCategory = MediaCategory.Media,
  StreamingCaptureMode = selectedAudioDevice == null ? StreamingCaptureMode.Video : StreamingCaptureMode.AudioAndVideo,
  AudioProcessing = Windows.Media.AudioProcessing.Default,
- AudioDeviceId = selectedAudioDevice
+ AudioDeviceId = selectedAudioDevice ?? string.Empty,
  });
  flash = await Lamp.GetDefaultAsync();