Raw Photo Capture サンプルコード Swift 4 + iOS 11

気がついたら dngPhotoDataRepresentation() API が deprecated扱いになっておりました💦 さしあたって昔の APIのままでも良いわけですが、尻カッチンになってからの修正はつらいので少し調査。ほとんど資料がないのですがとりあえずこのコードで動作しているようです。

コードの流れは以前のものと殆ど同じです。

初期化:

	override func viewDidLoad() {
		super.viewDidLoad()

		self.captureSession = AVCaptureSession()
		self.captureSession?.sessionPreset = .photo
		self.capturePhotoOutput = AVCapturePhotoOutput()
                self.captureDevice = AVCaptureDevice.default(for: .video)
                let input = try! AVCaptureDeviceInput(device: self.captureDevice!)
                self.captureSession?.addInput(input)
                self.captureSession?.addOutput(self.capturePhotoOutput!)

		self.previewLayer = AVCaptureVideoPreviewLayer(session: self.captureSession!)
		self.previewLayer?.frame = self.preView.bounds
		self.previewLayer?.videoGravity = AVLayerVideoGravity.resizeAspectFill
		self.previewLayer?.connection?.videoOrientation = AVCaptureVideoOrientation.portrait
		self.preView.layer.addSublayer(self.previewLayer!)
		self.captureSession?.startRunning()
	}

キャプチャ:

	@IBAction func capture(_ sender: Any) {
		let photoSettings : AVCapturePhotoSettings!
		guard let availableRawFormat = capturePhotoOutput?.__availableRawPhotoPixelFormatTypes.first else { return }
		photoSettings = AVCapturePhotoSettings(rawPixelFormatType: availableRawFormat.uint32Value)
		photoSettings.isAutoStillImageStabilizationEnabled = false
		photoSettings.flashMode = .off
		photoSettings.isHighResolutionPhotoEnabled = false
		let desiredPreviewPixelFormat = NSNumber(value: kCVPixelFormatType_32BGRA)
		if photoSettings.__availablePreviewPhotoPixelFormatTypes.contains(desiredPreviewPixelFormat) {
			photoSettings.previewPhotoFormat = [
				kCVPixelBufferPixelFormatTypeKey as String : desiredPreviewPixelFormat,
				kCVPixelBufferWidthKey as String : NSNumber(value: 512),
				kCVPixelBufferHeightKey as String : NSNumber(value: 512)
			]
		}
		self.capturePhotoOutput?.capturePhoto(with: photoSettings, delegate: self)
	}

保存:

	func photoOutput(_ output: AVCapturePhotoOutput, didFinishProcessingPhoto photo: AVCapturePhoto, error: Error?) {

		let dir = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true).first! as String
		let formatter = DateFormatter()
		formatter.dateFormat = "yyyyMMddHHmmss"
		formatter.locale = Locale.init(identifier: "en_US_POSIX")
		let filePath =  dir.appending(String(format: "/%@.dng", formatter.string(from: Date())))
		let dngFileURL = URL(fileURLWithPath: filePath)

		let dngData = photo.fileDataRepresentation()!
		do {
			try dngData.write(to: dngFileURL, options: [])
		} catch {
			print("Unable to write DNG file.")
			return
		}

		let items = [dngFileURL]
		let activityView = UIActivityViewController.init(activityItems: items, applicationActivities: nil)
		activityView.popoverPresentationController?.sourceView = self.view
		activityView.excludedActivityTypes = [
			UIActivityType.copyToPasteboard,
			UIActivityType.assignToContact,
			UIActivityType.openInIBooks,
		]
		self.present(activityView, animated: true, completion: nil)
	}

* Photo Libraryには保存できないようで（白い画像らしきものは保存されましたが）、ローカルに保存して共有する方法がよいのではないでしょうか。

使い方: “Capture”ボタンで撮影、直後にアクティビティが立ち上がるので好きなアプリで共有してください。

ご参考までに😗 プロジェクト一式は → GitHub.