swift - 在 glkview 前置摄像头显示镜像问题
问题描述
我在快速后置摄像头中使用 glkview 制作自定义摄像头，但是当我将摄像头切换到前面时。前置摄像头开始镜像，任何人都可以帮我解决这个问题。
import UIKit
import GLKit
import AVFoundation
public protocol FilterCamViewControllerDelegate: class {
func filterCamDidStartRecording(_ filterCam: FilterCamViewController)
func filterCamDidFinishRecording(_ filterCame: FilterCamViewController)
func filterCam(_ filterCam: FilterCamViewController, didFailToRecord error: Error)
func filterCam(_ filterCam: FilterCamViewController, didFinishWriting outputURL: URL)
func filterCam(_ filterCam: FilterCamViewController, didFocusAtPoint tapPoint: CGPoint)
}
open class FilterCamViewController: UIViewController {
var imageClickeClouser:((_ image: UIImage)->Void)?
public weak var cameraDelegate: FilterCamViewControllerDelegate?
public var devicePosition = AVCaptureDevice.Position.back
public var videoQuality = AVCaptureSession.Preset.high
public var filters: [CIFilter] = [] {
didSet {
recorder.filters = filters
}
}
lazy var glContext: EAGLContext = {
let glContext = EAGLContext(api: .openGLES2)
return glContext!
}()
public var hasTorch: Bool {
return recorder.hasTorch
}
public var torchLevel: Float {
set {
recorder.torchLevel = newValue
}
get {
return recorder.torchLevel
}
}
public var shouldShowDebugLabels: Bool = false {
didSet {
fpsLabel.isHidden = !shouldShowDebugLabels
secLabel.isHidden = !shouldShowDebugLabels
}
}
private let previewViewRect: CGRect
private var videoPreviewContainerView: UIView!
private var videoPreviewView: GLKView!
private var ciContext: CIContext!
private var recorder: Recorder!
private var videoPreviewViewBounds: CGRect = .zero
private var fpsLabel: UILabel!
private var secLabel: UILabel!
// var stillImageOutput: AVCapturePhotoOutput?
var stillImageOutput = AVCapturePhotoOutput()
var capturedUIImage: UIImage?
lazy var cameraSession: AVCaptureSession = {
let session = AVCaptureSession()
session.sessionPreset = AVCaptureSession.Preset.photo
return session
}()
lazy var photoFullPath: String = {
let documentsPath = NSSearchPathForDirectoriesInDomains(
.documentDirectory,
.userDomainMask,
true)[0]
let photoFullPath = documentsPath + "/swift_3_camera_capture_photo.png"
let fileManager = FileManager.default
if fileManager.fileExists(atPath: photoFullPath) {
do {
try fileManager.removeItem(at: URL(string: photoFullPath)!)
} catch let error as NSError {
print (error)
}
}
return photoFullPath
}()
private var isRecording: Bool {
return recorder.assetWriter != nil
}
override open var supportedInterfaceOrientations: UIInterfaceOrientationMask {
return .portrait
}
override open var shouldAutorotate: Bool {
return false
}
public init(previewViewRect: CGRect) {
self.previewViewRect = previewViewRect
super.init(nibName: nil, bundle: nil)
}
required public init?(coder aDecoder: NSCoder) {
previewViewRect = UIScreen.main.bounds
super.init(coder: aDecoder)
}
override open func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = .clear
videoPreviewContainerView = UIView(frame: previewViewRect)
videoPreviewContainerView.backgroundColor = .black
view.addSubview(videoPreviewContainerView)
view.sendSubview(toBack: videoPreviewContainerView)
// setup the GLKView for video/image preview
guard let eaglContext = EAGLContext(api: .openGLES2) else {
fatalError("Could not create EAGLContext")
}
if eaglContext != EAGLContext.current() {
EAGLContext.setCurrent(eaglContext)
}
videoPreviewView = GLKView(frame: CGRect(x: 0,
y: 0,
width: previewViewRect.height,
height: previewViewRect.width),
context: eaglContext)
videoPreviewContainerView.addSubview(videoPreviewView)
videoPreviewView.transform = CGAffineTransform(rotationAngle: .pi / 2)
videoPreviewView.frame = view.bounds
videoPreviewView.center = CGPoint(x: previewViewRect.width * 0.5, y: previewViewRect.height * 0.5)
videoPreviewView.enableSetNeedsDisplay = false
ciContext = CIContext(eaglContext: eaglContext, 选项: [kCIContextWorkingColorSpace: NSNull()])
recorder = Recorder(ciContext: ciContext, devicePosition: devicePosition, preset: videoQuality)
recorder.delegate = self
setupDebugLabels()
addGestureRecognizers()
}
func setupCameraSession() {
let captureDevice = AVCaptureDevice.default(AVCaptureDevice.DeviceType.builtInWideAngleCamera, for: AVMediaType.video, position: AVCaptureDevice.Position.back)
do {
cameraSession.beginConfiguration()
let deviceInput = try AVCaptureDeviceInput(device: captureDevice!)
if cameraSession.canAddInput(deviceInput) {
cameraSession.addInput(deviceInput)
}
stillImageOutput = AVCapturePhotoOutput()
if cameraSession.canAddOutput(stillImageOutput) {
cameraSession.addOutput(stillImageOutput)
}
let videoOutput = AVCaptureVideoDataOutput()
videoOutput.videoSettings = [
kCVPixelBufferPixelFormatTypeKey as AnyHashable: kCVPixelFormatType_420YpCbCr8BiPlanarFullRange
] as! [String : Any]
videoOutput.alwaysDiscardsLateVideoFrames = true
if cameraSession.canAddOutput(videoOutput) {
cameraSession.addOutput(videoOutput)
}
cameraSession.commitConfiguration()
} catch let error as NSError {
print (error)
}
}
// MARK: - Private
private func setupDebugLabels() {
fpsLabel = UILabel()
fpsLabel.isHidden = true
view.addSubview(fpsLabel)
fpsLabel.translatesAutoresizingMaskIntoConstraints = false
fpsLabel.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 10).isActive = true
fpsLabel.topAnchor.constraint(equalTo: view.topAnchor, constant: 20).isActive = true
fpsLabel.text = ""
fpsLabel.textColor = .white
secLabel = UILabel()
secLabel.isHidden = true
view.addSubview(secLabel)
secLabel.translatesAutoresizingMaskIntoConstraints = false
secLabel.leadingAnchor.constraint(equalTo: fpsLabel.leadingAnchor).isActive = true
secLabel.topAnchor.constraint(equalTo: fpsLabel.bottomAnchor).isActive = true
secLabel.text = ""
secLabel.textColor = .white
}
private func addGestureRecognizers() {
let singleTapGesture = UITapGestureRecognizer(target: self, action: #selector(singleTapGesture(tap:)))
singleTapGesture.numberOfTapsRequired = 1
view.addGestureRecognizer(singleTapGesture)
}
@objc private func singleTapGesture(tap: UITapGestureRecognizer) {
let screenSize = view.bounds.size
let tapPoint = tap.location(in: view)
let x = tapPoint.y / screenSize.height
let y = 1.0 - tapPoint.x / screenSize.width
let focusPoint = CGPoint(x: x, y: y)
recorder.focus(at: focusPoint)
// call delegate function and pass in the location of the touch
DispatchQueue.main.async {
self.cameraDelegate?.filterCam(self, didFocusAtPoint: tapPoint)
}
}
private func calculateDrawRect(for image: CIImage) -> CGRect {
let sourceExtent = image.extent
let sourceAspect = sourceExtent.size.width / sourceExtent.size.height
let previewAspect = videoPreviewViewBounds.size.width / videoPreviewViewBounds.size.height
// we want to maintain the aspect ratio of the screen size, so we clip the video image
var drawRect = sourceExtent
if sourceAspect > previewAspect {
// use full height of the video image, and center crop the width
drawRect.origin.x += (drawRect.size.width - drawRect.size.height * previewAspect) / 2.0
drawRect.size.width = drawRect.size.height * previewAspect
} else {
// use full width of the video image, and center crop the height
drawRect.origin.y += (drawRect.size.height - drawRect.size.width / previewAspect) / 2.0
drawRect.size.height = drawRect.size.width / previewAspect
}
return drawRect
}
// MARK: - Public
public func startRecording() {
if !isRecording {
recorder.startRecording()
}
}
public func captureImage(imageHandkler: @escaping ((_ image: UIImage)->Void)){
imageHandkler(videoPreviewView.snapshot)
}
public func stopRecording() {
if isRecording {
recorder.stopRecording()
}
}
public func changeCamera(){
recorder.changeCamera()
}
}
扩展 FilterCamViewController: RecorderDelegate {
func recorderDidUpdate(drawingImage: CIImage) {
let drawRect = calculateDrawRect(for: drawingImage)
videoPreviewView.bindDrawable()
glClearColor(0.0, 0.0, 0.0, 1.0)
glClear(GLbitfield(GL_COLOR_BUFFER_BIT))
ciContext.draw(drawingImage, in: videoPreviewViewBounds, from: drawRect)
videoPreviewView.display()
}
func recorderDidStartRecording() {
secLabel?.text = "00:00"
cameraDelegate?.filterCamDidStartRecording(self)
}
func recorderDidAbortRecording() {}
func recorderDidFinishRecording() {
cameraDelegate?.filterCamDidFinishRecording(self)
}
func recorderWillStartWriting() {
secLabel?.text = "Saving..."
}
func recorderDidFinishWriting(outputURL: URL) {
let fileName = UUID().uuidString
let tempURL = URL(fileURLWithPath: NSTemporaryDirectory()).appendingPathComponent(fileName).appendingPathExtension("mov")
Composer.compose(videoURL: outputURL, outputURL: tempURL) { [weak self] url, error in
guard let strongSelf = self else { return }
if let url = url {
strongSelf.cameraDelegate?.filterCam(strongSelf, didFinishWriting: url)
} else if let error = error {
strongSelf.cameraDelegate?.filterCam(strongSelf, didFailToRecord: error)
}
}
}
func recorderDidUpdate(frameRate: Float) {
fpsLabel?.text = NSString(format: "%.1f fps", frameRate) as String
}
func recorderDidUpdate(recordingSeconds: Int) {
secLabel?.text = NSString(format: "%02lu:%02lu sec", recordingSeconds / 60, recordingSeconds % 60) as String
}
func recorderDidFail(with error: Error & LocalizedError) {
cameraDelegate?.filterCam(self, didFailToRecord: error)
}
}
扩展 FilterCamViewController: AVCapturePhotoCaptureDelegate{
public func photoOutput(_ output: AVCapturePhotoOutput, didFinishProcessingPhoto photoSampleBuffer: CMSampleBuffer?, previewPhoto previewPhotoSampleBuffer: CMSampleBuffer?, resolvedSettings: AVCaptureResolvedPhotoSettings, bracketSettings: AVCaptureBracketedStillImageSettings?, error: Error?) {
if let error = error {
print(error.localizedDescription)
}
if let sampleBuffer = photoSampleBuffer, let previewBuffer = previewPhotoSampleBuffer, let dataImage = AVCapturePhotoOutput.jpegPhotoDataRepresentation(forJPEGSampleBuffer: sampleBuffer, previewPhotoSampleBuffer: previewBuffer) {
imageClickeClouser?( UIImage(data: dataImage)!)
}
}
}
解决方案
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