void ChangeCamera(NSObject sender)
{
//CameraButton.Enabled = false;
//RecordButton.Enabled = false;
//PhotoButton.Enabled = false;
//LivePhotoModeButton.Enabled = false;
//CaptureModeControl.Enabled = false;
sessionQueue.DispatchAsync(() =>
{
var currentVideoDevice = videoDeviceInput.Device;
var currentPosition = currentVideoDevice.Position;
AVCaptureDevicePosition preferredPosition = AVCaptureDevicePosition.Unspecified;
AVCaptureDeviceType preferredDeviceType = AVCaptureDeviceType.BuiltInDualCamera;
switch (currentPosition)
{
//case AVCaptureDevicePosition.Unspecified:
//preferredPosition = AVCaptureDevicePosition.Back;
//preferredDeviceType = AVCaptureDeviceType.BuiltInDualCamera;
//break;
case AVCaptureDevicePosition.Unspecified:
case AVCaptureDevicePosition.Front:
preferredPosition = AVCaptureDevicePosition.Back;
preferredDeviceType = AVCaptureDeviceType.BuiltInDualCamera;
break;
case AVCaptureDevicePosition.Back:
preferredPosition = AVCaptureDevicePosition.Front;
preferredDeviceType = AVCaptureDeviceType.BuiltInWideAngleCamera;
break;
}
var devices = videoDeviceDiscoverySession.Devices;
AVCaptureDevice newVideoDevice = null;
// First, look for a device with both the preferred position and device type.
foreach (var device in devices)
{
if (device.Position == preferredPosition && device.DeviceType.GetConstant() == preferredDeviceType.GetConstant())
{
newVideoDevice = device;
break;
}
}
// Otherwise, look for a device with only the preferred position.
if (newVideoDevice == null)
{
foreach (var device in devices)
{
if (device.Position == preferredPosition)
{
newVideoDevice = device;
break;
}
}
}
if (newVideoDevice != null)
{
var lVideoDeviceInput = AVCaptureDeviceInput.FromDevice(newVideoDevice);
session.BeginConfiguration();
// Remove the existing device input first, since using the front and back camera simultaneously is not supported.
session.RemoveInput(videoDeviceInput);
if (session.CanAddInput(lVideoDeviceInput))
{
if (subjectAreaDidChangeObserver != null)
{
subjectAreaDidChangeObserver.Dispose();
}
subjectAreaDidChangeObserver = NSNotificationCenter.DefaultCenter.AddObserver(AVCaptureDevice.SubjectAreaDidChangeNotification, SubjectAreaDidChange, newVideoDevice);
session.AddInput(lVideoDeviceInput);
videoDeviceInput = lVideoDeviceInput;
}
else
{
session.AddInput(videoDeviceInput);
}
if (movieFileOutput != null)
{
var movieFileOutputConnection = movieFileOutput.ConnectionFromMediaType(AVMediaType.Video);
if (movieFileOutputConnection.SupportsVideoStabilization)
{
movieFileOutputConnection.PreferredVideoStabilizationMode = AVCaptureVideoStabilizationMode.Auto;
}
}
/*
* Set Live Photo capture and depth data delivery if it is supported. When changing cameras, the
* `livePhotoCaptureEnabled` and `depthDataDeliveryEnabled` properties of the AVCapturePhotoOutput gets set to NO when
* a video device is disconnected from the session. After the new video device is
* added to the session, re-enable Live Photo capture and depth data delivery if they are supported.
*/
photoOutput.IsLivePhotoCaptureEnabled = photoOutput.IsLivePhotoCaptureSupported;
//photoOutput.IsDepthDataDeliveryEnabled(photoOutput.IsDepthDataDeliverySupported());
session.CommitConfiguration();
}
//DispatchQueue.MainQueue.DispatchAsync(() =>
//{
// CameraButton.Enabled = true;
// RecordButton.Enabled = CaptureModeControl.SelectedSegment == (int)AVCamCaptureMode.Movie;
// PhotoButton.Enabled = true;
// LivePhotoModeButton.Enabled = true;
// CaptureModeControl.Enabled = true;
// DepthDataDeliveryButton.Enabled = photoOutput.IsDepthDataDeliveryEnabled();
// DepthDataDeliveryButton.Hidden = !photoOutput.IsDepthDataDeliverySupported();
//});
});
}
