I am working on an iPad app using the front camera. The camera logic is implemented using the AVFoundation framework. During a session I use central stage mode to center the face with front camera . Central stage mode works fine in all cases except when I set the session preset photo. In other presets: high, medium, low, cif352x288, vga640x480, hd1280x720, hd1920x1080, iFrame960x540, iFrame1280x720, inputPriority presets central stage mode working except photo session preset. Can you explain why this happens or maybe it is an unobvious bug?
Code snippet:
final class CameraManager {
//MARK: - Properties
private let captureSession: AVCaptureSession
private let photoOutput: AVCapturePhotoOutput
private let previewLayer: AVCaptureVideoPreviewLayer
//MARK: - Init
init() {
captureSession = AVCaptureSession()
photoOutput = AVCapturePhotoOutput()
previewLayer = AVCaptureVideoPreviewLayer(session: captureSession)
}
//MARK: - Methods Setup Camera and preview layer
func setupPreviewLayerFrame(view: UIView) {
previewLayer.frame = view.frame
view.layer.insertSublayer(previewLayer, at: 0)
setupCamera()
}
private func setupCamera() {
guard let videoCaptureDevice = AVCaptureDevice.default(.builtInWideAngleCamera, for: .video, position: .front) else { return }
AVCaptureDevice.centerStageControlMode = .app
AVCaptureDevice.isCenterStageEnabled = true
do {
let input = try AVCaptureDeviceInput(device: videoCaptureDevice)
captureSession.addInput(input)
captureSession.addOutput(photoOutput)
/// high, medium, low, cif352x288, vga640x480, hd1280x720, hd1920x1080, iFrame960x540, iFrame1280x720 and inputPriority presets working except photo session preset
captureSession.sessionPreset = .photo
DispatchQueue.global(qos: .userInteractive).async {
self.captureSession.startRunning()
}
} catch {
print("Error setting up camera: \(error.localizedDescription)")
}
}
}
