Swift implementation of a DJI-provided sample to convert vc_pixelbuffer_fastupload to a usable CVPixelBuffer

CreatePixelBuffer.swift

func createPixelBuffer(fromFrame frame: VideoFrameYUV) -> CVPixelBuffer? {
        var initialPixelBuffer: CVPixelBuffer?
        let _: CVReturn = CVPixelBufferCreate(kCFAllocatorDefault, Int(frame.width), Int(frame.height), kCVPixelFormatType_420YpCbCr8Planar, nil, &initialPixelBuffer)
        
        guard let pixelBuffer = initialPixelBuffer,
            CVPixelBufferLockBaseAddress(pixelBuffer, []) == kCVReturnSuccess
            else {
            return nil
        }
        
        let yPlaneWidth = CVPixelBufferGetWidthOfPlane(pixelBuffer, 0)
        let yPlaneHeight = CVPixelBufferGetHeightOfPlane(pixelBuffer, 0)
        
        let uPlaneWidth = CVPixelBufferGetWidthOfPlane(pixelBuffer, 1)
        let uPlaneHeight = CVPixelBufferGetHeightOfPlane(pixelBuffer, 1)
        
        let vPlaneWidth = CVPixelBufferGetWidthOfPlane(pixelBuffer, 2)
        let vPlaneHeight = CVPixelBufferGetHeightOfPlane(pixelBuffer, 2)
        
        let yDestination = CVPixelBufferGetBaseAddressOfPlane(pixelBuffer, 0)
        memcpy(yDestination, frame.luma, yPlaneWidth * yPlaneHeight)
        
        let uDestination = CVPixelBufferGetBaseAddressOfPlane(pixelBuffer, 1)
        memcpy(uDestination, frame.chromaB, uPlaneWidth * uPlaneHeight)
        
        let vDestination = CVPixelBufferGetBaseAddressOfPlane(pixelBuffer, 2)
        memcpy(vDestination, frame.chromaR, vPlaneWidth * vPlaneHeight)
        
        CVPixelBufferUnlockBaseAddress(pixelBuffer, [])
        
        return pixelBuffer
}

YourApp.swift

override func viewDidLoad() {
    super.viewDidLoad()
    registerApp()
}

// MARK: Registering app via the DJI SDK
func registerApp() {
    DJISDKManager.registerApp(with: self)
    DJIVideoPreviewer.instance()?.registFrameProcessor(self)
}