void CapturePhoto(NSObject sender)
{
/*
* Retrieve the video preview layer's video orientation on the main queue before
* entering the session queue. We do this to ensure UI elements are accessed on
* the main thread and session configuration is done on the session queue.
*/
var videoPreviewLayerVideoOrientation = VideoPreviewLayer.Connection.VideoOrientation;
sessionQueue.DispatchAsync(() =>
{
// Update the photo output's connection to match the video orientation of the video preview layer.
var photoOutputConnection = photoOutput.ConnectionFromMediaType(AVMediaType.Video);
photoOutputConnection.VideoOrientation = videoPreviewLayerVideoOrientation;
AVCapturePhotoSettings photoSettings;
// Capture HEIF photo when supported, with flash set to auto and high resolution photo enabled.
if (photoOutput.AvailablePhotoCodecTypes.Where(codec => codec == AVVideo2.CodecHEVC).Any())
{
photoSettings = AVCapturePhotoSettings.FromFormat(new NSDictionary <NSString, NSObject>(AVVideo.CodecKey, AVVideo2.CodecHEVC));
}
else
{
photoSettings = AVCapturePhotoSettings.Create();
}
if (videoDeviceInput.Device.FlashAvailable)
{
photoSettings.FlashMode = AVCaptureFlashMode.Auto;
}
photoSettings.IsHighResolutionPhotoEnabled = true;
if (photoSettings.AvailablePreviewPhotoPixelFormatTypes.Count() > 0)
{
photoSettings.PreviewPhotoFormat = new NSDictionary <NSString, NSObject>(CoreVideo.CVPixelBuffer.PixelFormatTypeKey, photoSettings.AvailablePreviewPhotoPixelFormatTypes.First());
}
if (livePhotoMode == AVCamLivePhotoMode.On && photoOutput.IsLivePhotoCaptureSupported)
{
// Live Photo capture is not supported in movie mode.
var livePhotoMovieFileName = Guid.NewGuid().ToString();
var livePhotoMovieFilePath = NSFileManager.DefaultManager.GetTemporaryDirectory().Append($"{livePhotoMovieFileName}.mov", false);
photoSettings.LivePhotoMovieFileUrl = livePhotoMovieFilePath;
}
if (depthDataDeliveryMode == AVCamDepthDataDeliveryMode.On && photoOutput.IsDepthDataDeliverySupported())
{
photoSettings.IsDepthDataDeliveryEnabled(true);
}
else
{
photoSettings.IsDepthDataDeliveryEnabled(false);
}
// Use a separate object for the photo capture delegate to isolate each capture life cycle.
var photoCaptureDelegate = new AVCamPhotoCaptureDelegate(photoSettings, () =>
{
DispatchQueue.MainQueue.DispatchAsync(() =>
{
VideoPreviewLayer.Opacity = 0.0f;
UIView.Animate(0.25, () =>
{
VideoPreviewLayer.Opacity = 1.0f;
});
});
}, (bool capturing) =>
{
/*
* Because Live Photo captures can overlap, we need to keep track of the
* number of in progress Live Photo captures to ensure that the
* Live Photo label stays visible during these captures.
*/
sessionQueue.DispatchAsync(() =>
{
if (capturing)
{
inProgressLivePhotoCapturesCount++;
}
else
{
inProgressLivePhotoCapturesCount--;
}
var lInProgressLivePhotoCapturesCount = inProgressLivePhotoCapturesCount;
//DispatchQueue.MainQueue.DispatchAsync(() =>
//{
// if (lInProgressLivePhotoCapturesCount > 0)
// {
// CapturingLivePhotoLabel.Hidden = false;
// }
// else if (lInProgressLivePhotoCapturesCount == 0)
// {
// CapturingLivePhotoLabel.Hidden = true;
// }
// else
// {
// Console.WriteLine(@"Error: In progress live photo capture count is less than 0");
// }
//});
});
}, (AVCamPhotoCaptureDelegate lPhotoCaptureDelegate) =>
{
// When the capture is complete, remove a reference to the photo capture delegate so it can be deallocated.
sessionQueue.DispatchAsync(() =>
{
inProgressPhotoCaptureDelegates[lPhotoCaptureDelegate.RequestedPhotoSettings.UniqueID] = null;
});
});
/*
* The Photo Output keeps a weak reference to the photo capture delegate so
* we store it in an array to maintain a strong reference to this object
* until the capture is completed.
*/
inProgressPhotoCaptureDelegates[photoCaptureDelegate.RequestedPhotoSettings.UniqueID] = photoCaptureDelegate;
photoOutput.CapturePhoto(photoSettings, photoCaptureDelegate);
});
}