Question

大家好，我已经在我的应用程序中实现了一个相机屏幕。我正在使用func photoOutput通过在我的IBAction插座中调用来捕获我的实时预览。

与此同时，我设法查找如何使用AVVideo将CIFilters应用于我的实时预览

但问题是我的实时预览现在在视频会话上运行而不是在我实施过滤器后的照片会话

我无法捕捉到我看到的画面。

func captureOutput(_ output: AVCaptureOutput, didOutput sampleBuffer: 
CMSampleBuffer, from connection: AVCaptureConnection) {
    connection.videoOrientation = orientation
    let videoOutput = AVCaptureVideoDataOutput()
    videoOutput.setSampleBufferDelegate(self, queue: DispatchQueue.main)

    let comicEffect = CIFilter(name: "CIPhotoEffectMono")

    let pixelBuffer = CMSampleBufferGetImageBuffer(sampleBuffer)
    let cameraImage = CIImage(cvImageBuffer: pixelBuffer!)

    comicEffect!.setValue(cameraImage, forKey: kCIInputImageKey)

    let cgImage = self.context.createCGImage(comicEffect!.outputImage!, from: cameraImage.extent)!

    DispatchQueue.main.async {
        let filteredImage = UIImage(cgImage: cgImage)
        self.captureImageView.image = filteredImage
    }

是我的过滤器代码，我的实时屏幕捕获代码如下

func photoOutput(_ captureOutput: AVCapturePhotoOutput,
                 didFinishProcessingPhoto photoSampleBuffer: CMSampleBuffer?,
                 previewPhoto previewPhotoSampleBuffer: CMSampleBuffer?,
                 resolvedSettings: AVCaptureResolvedPhotoSettings,
                 bracketSettings: AVCaptureBracketedStillImageSettings?,
                 error: Error?) {
    // Make sure we get some photo sample buffer
    guard error == nil,
        let photoSampleBuffer = photoSampleBuffer else {
            print("Error capturing photo: \(String(describing: error))")
            return
    }

    // Convert photo same buffer to a jpeg image data by using AVCapturePhotoOutput
    guard let imageData = AVCapturePhotoOutput.jpegPhotoDataRepresentation(forJPEGSampleBuffer: photoSampleBuffer, previewPhotoSampleBuffer: previewPhotoSampleBuffer) else {
        return
    }
    // Initialise an UIImage with taken image data
    let capturedImage = UIImage.init(data: imageData , scale: 1.0)
    if let image = capturedImage{
        // Save captured image to photos album
        // Resize image taken to the ratio of the previewView
        let originalImage = image
        let liveImage: CGRect = previewView.frame
        let liveRatio = (liveImage.width) / (liveImage.height)
        let resultingRectWidth = originalImage.size.width
        let resultingRectHeight = resultingRectWidth / (liveRatio)
        let resultingRect: CGRect = CGRect(x: 0, y: 0, width: resultingRectWidth, height: resultingRectHeight)
        //            print("@#$@#$@#$#@$@#$")
        //            print(originalImage.size.width)
        //            print(originalImage.size.height)
        //            print(resultingRectWidth)
        //            print(resultingRectHeight)
        //            print(liveImage.size.width)
        //            print(liveImage.size.height)
        //            print("@#$#@$@#$#$@#$@#")
        let topInset = -(originalImage.size.height - resultingRectHeight) / 2
        let croppedImage = originalImage.inAppCrop(image: originalImage, cropRect: resultingRect, offset: topInset)
        captureImageView.image = croppedImage
        UIImageWriteToSavedPhotosAlbum(croppedImage!, nil, nil, nil)
        captureImageView.isHidden = false
        captureButtonView.isHidden = true
        captureButton.isHidden = true
        selfieButton.isHidden = true
        self.uploadPageViewController?.disablePaging()
        self.uploadTabBarViewController?.inAppCamButton.isUserInteractionEnabled = false
        self.uploadTabBarViewController?.libraryButton.isUserInteractionEnabled = false
        self.uploadTabBarViewController?.inAppCamImage = croppedImage

    }
}

我的IBaction调用photoOutput函数如下

@IBAction func onTapTakePhoto(_ sender: Any) {
    // Make sure capturePhotoOutput is valid
    guard let capturePhotoOutput = self.capturePhotoOutput else { return }
    // Get an instance of AVCapturePhotoSettings class
    let photoSettings = AVCapturePhotoSettings()
    // Set photo settings for our need
    photoSettings.isAutoStillImageStabilizationEnabled = true
    photoSettings.isHighResolutionPhotoEnabled = true
    photoSettings.flashMode = .off

    // Call capturePhoto method by passing our photo settings and a delegate implementing AVCapturePhotoCaptureDelegate
    capturePhotoOutput.capturePhoto(with: photoSettings, delegate: self)

    self.uploadTabBarViewController?.titleButton.setTitle("Preview", for: .normal)
    self.uploadTabBarViewController?.previewCheckButton.isHidden = false
    self.uploadTabBarViewController?.backButton.isHidden = false
    self.uploadTabBarViewController?.cancelButton.isHidden = true

}

iOS自定义相机，带灰度滤镜+拍照

0 个答案: