var imageView: UIImageView!
var cameraCapture: CameraCapture?
var lutFilter: CIFilter?
extension FCRCameraViewController: UIDocumentPickerDelegate{
func showDocumentPicker() {
let documentPicker = UIDocumentPickerViewController(documentTypes: ["public.item"], in: .import)
documentPicker.delegate = self
self.present(documentPicker, animated: true, completion: nil)
}
func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentsAt urls: [URL]) {
guard let selectedURL = urls.first else { return }
addCustomLutWithFilter(with: selectedURL)
}
func documentPickerWasCancelled(_ controller: UIDocumentPickerViewController) {
}
func addCustomLutWithFilter(with lutFile: URL?){
footerTabBar.isHidden = true
imageView = UIImageView(frame: view.bounds)
view.addSubview(imageView)
if let lutURL = lutFile,
let lutData = try? Data(contentsOf: lutURL) {
if let filter = createFilterFromLUTData(lutData) {
self.lutFilter = filter
} else {
print("Error creating CIFilter from LUT data.")
}
}
self.cameraCapture = CameraCapture(callback: { image in
guard let image = image else { return }
var filteredImage = image
if let lutFilter = self.lutFilter {
lutFilter.setValue(image, forKey: kCIInputImageKey)
if let outputImage = lutFilter.outputImage {
filteredImage = outputImage
}
}
let uiImage = UIImage(ciImage: filteredImage.transformToOrigin(withSize: self.view.bounds.size))
self.imageView.image = uiImage
})
cameraCapture?.start()
closeCameraButton.isHidden = false
view.bringSubviewToFront(closeCameraButton)
}
func createFilterFromLUTData(_ lutData: Data) -> CIFilter? {
guard let filter = CIFilter(name: "CIColorCube") else {
return nil
}
let colorCubeData = [UInt8](lutData)
let cubeData = Data(bytes: colorCubeData, count: 4096 * MemoryLayout<UInt8>.size * 4)
filter.setValue(NSNumber(value: 16), forKey: "inputCubeDimension")
filter.setValue(cubeData, forKey: "inputCubeData")
print(cubeData)
return filter
}
@objc func disableCameraAction(_ sender: UIButton){
DispatchQueue.main.async {
self.cameraCapture?.stop()
self.imageView.removeFromSuperview()
self.closeCameraButton.isHidden = true
self.footerTabBar.isHidden = false
}
}
}
The .cube file is not being loaded correctly in the realtime camera. If anyone has the solution, please share your code. The Blackmagic Camera app utilizes the .cube file to load it in real-time on the camera within the application.
