chore(ios): working iOS cameraview

Author: farfromrefug

packages/ui-cameraview/platforms/ios/src/CameraView.swift

@@ -0,0 +1,181 @@
+import UIKit
+import CoreVideo
+import CoreMedia
+import Foundation
+import NextLevel
+import AVFoundation
+
+struct RuntimeError: LocalizedError {
+  let description: String
+  
+  init(_ description: String) {
+    self.description = description
+  }
+  
+  var errorDescription: String? {
+    description
+  }
+}
+
+@objcMembers
+@objc(NSCameraView)
+public class NSCameraView: UIView, NextLevelVideoDelegate {
+  public weak var processingDelegate: ProcessRawVideoSampleBufferDelegate?
+  var nextLevel: NextLevel?
+  
+  override init(frame: CGRect) {
+    super.init(frame: frame )
+    commonInit()
+  }
+  
+  required init?(coder: NSCoder) {
+    super.init(coder: coder)
+    commonInit()
+  }
+  deinit {
+    self.processingDelegate = nil
+  }
+  
+  public override var frame: CGRect {
+    get {
+      return super.frame
+    }
+    set {
+      super.frame = newValue
+      self.nextLevel?.previewLayer.frame = self.bounds
+    }
+  }
+  
+  public var flashMode: Int {
+    get {
+      return (self.nextLevel?.flashMode ?? NextLevelFlashMode.off).rawValue
+    }
+    set {
+      self.nextLevel?.flashMode = NextLevelFlashMode(rawValue: newValue)!
+    }
+  }
+  public var torchMode: Int {
+    get {
+      return (self.nextLevel?.torchMode ?? NextLevelTorchMode.off).rawValue
+    }
+    set {
+      self.nextLevel?.torchMode = NextLevelTorchMode(rawValue: newValue)!
+    }
+  }
+  
+  func commonInit() {
+    self.autoresizingMask = [.flexibleWidth, .flexibleHeight]
+    self.backgroundColor = UIColor.black
+    
+    self.nextLevel = NextLevel()
+    if let nextLevel = self.nextLevel {
+      // Configure NextLevel by modifying the configuration ivars
+      self.layer.addSublayer(nextLevel.previewLayer)
+      nextLevel.previewLayer.frame = self.bounds
+      //    nextLevel.delegate = self
+      //     nextLevel.deviceDelegate = self
+      // nextLevel.flashDelegate = self
+      nextLevel.videoDelegate = self
+      // nextLevel.photoDelegate = self
+      // nextLevel.metadataObjectsDelegate = self
+      
+      nextLevel.automaticallyUpdatesDeviceOrientation = true
+      
+      // video configuration
+      nextLevel.videoConfiguration.preset = AVCaptureSession.Preset.hd1280x720
+      nextLevel.videoConfiguration.bitRate = 5500000
+      nextLevel.videoConfiguration.maxKeyFrameInterval = 30
+      nextLevel.videoConfiguration.profileLevel = AVVideoProfileLevelH264HighAutoLevel
+      
+      // audio configuration
+      // for now disable audio
+      nextLevel.captureMode = NextLevelCaptureMode.videoWithoutAudio
+      //    nextLevel.audioConfiguration.bitRate = 96000
+      //    nextLevel.disableAudioInputDevice()
+      // metadata objects configuration
+      // nextLevel.metadataObjectTypes = [AVMetadataObject.ObjectType.face, AVMetadataObject.ObjectType.qr]
+    }
+  }
+  
+  func startPreview() throws {
+    do {
+        try self.nextLevel?.start()
+    } catch {
+      let nextLevelError = error as! NextLevelError
+      // re throw the error with the description so that N can correctly show the error message
+      throw RuntimeError(nextLevelError.description)
+    }
+    
+  }
+  
+  func stopPreview() {
+    self.nextLevel?.stop()
+  }
+  func toggleCamera() {
+    self.nextLevel?.flipCaptureDevicePosition()
+  }
+  
+  public func nextLevel(_ nextLevel: NextLevel, willProcessRawVideoSampleBuffer sampleBuffer: CMSampleBuffer, onQueue queue: DispatchQueue) {
+    self.processingDelegate?.cameraView(self, willProcessRawVideoSampleBuffer: sampleBuffer, onQueue: queue)
+  }
+  
+  public func nextLevel(_ nextLevel: NextLevel, renderToCustomContextWithImageBuffer imageBuffer: CVPixelBuffer, onQueue queue: DispatchQueue) {
+    self.processingDelegate?.cameraView(self, renderToCustomContextWithImageBuffer: imageBuffer, onQueue: queue)
+  }
+  
+  public func nextLevel(_ nextLevel: NextLevel, didUpdateVideoZoomFactor videoZoomFactor: Float) {
+    
+  }
+  
+  public func nextLevel(_ nextLevel: NextLevel, willProcessFrame frame: AnyObject, timestamp: TimeInterval, onQueue queue: DispatchQueue) {
+    
+  }
+  
+  public func nextLevel(_ nextLevel: NextLevel, didSetupVideoInSession session: NextLevelSession) {
+    
+  }
+  
+  public func nextLevel(_ nextLevel: NextLevel, didSetupAudioInSession session: NextLevelSession) {
+    
+  }
+  
+  public func nextLevel(_ nextLevel: NextLevel, didStartClipInSession session: NextLevelSession) {
+    
+  }
+  
+  public func nextLevel(_ nextLevel: NextLevel, didCompleteClip clip: NextLevelClip, inSession session: NextLevelSession) {
+    
+  }
+  
+  public func nextLevel(_ nextLevel: NextLevel, didAppendVideoSampleBuffer sampleBuffer: CMSampleBuffer, inSession session: NextLevelSession) {
+    
+  }
+  
+  public func nextLevel(_ nextLevel: NextLevel, didSkipVideoSampleBuffer sampleBuffer: CMSampleBuffer, inSession session: NextLevelSession) {
+    
+  }
+  
+  public func nextLevel(_ nextLevel: NextLevel, didAppendVideoPixelBuffer pixelBuffer: CVPixelBuffer, timestamp: TimeInterval, inSession session: NextLevelSession) {
+    
+  }
+  
+  public func nextLevel(_ nextLevel: NextLevel, didSkipVideoPixelBuffer pixelBuffer: CVPixelBuffer, timestamp: TimeInterval, inSession session: NextLevelSession) {
+    
+  }
+  
+  public func nextLevel(_ nextLevel: NextLevel, didAppendAudioSampleBuffer sampleBuffer: CMSampleBuffer, inSession session: NextLevelSession) {
+    
+  }
+  
+  public func nextLevel(_ nextLevel: NextLevel, didSkipAudioSampleBuffer sampleBuffer: CMSampleBuffer, inSession session: NextLevelSession) {
+    
+  }
+  
+  public func nextLevel(_ nextLevel: NextLevel, didCompleteSession session: NextLevelSession) {
+    
+  }
+  
+  public func nextLevel(_ nextLevel: NextLevel, didCompletePhotoCaptureFromVideoFrame photoDict: [String : Any]?) {
+    
+  }
+}

packages/ui-cameraview/platforms/ios/src/NSCameraView.swift

@@ -0,0 +1,9 @@
+import CoreVideo
+import CoreMedia
+import Foundation
+
+@objc(ProcessRawVideoSampleBufferDelegate)
+public protocol ProcessRawVideoSampleBufferDelegate: AnyObject {
+    func cameraView(_ cameraView: NSCameraView, willProcessRawVideoSampleBuffer sampleBuffer: CMSampleBuffer, onQueue queue: DispatchQueue)
+    func cameraView(_ cameraView: NSCameraView, renderToCustomContextWithImageBuffer imageBuffer: CVPixelBuffer, onQueue queue: DispatchQueue)
+}

packages/ui-cameraview/platforms/ios/src/ProcessRawVideoSampleBufferDelegate.swift

@@ -72,15 +72,15 @@ export class CameraView extends CameraViewBase {
 
     createProcessor() {
         if (!this.processor) {
-            (this.processor = new com.nativescript.cameraview.ImageAnalysisCallback({
+            this.processor = new com.nativescript.cameraview.ImageAnalysisCallback({
                 process: (image, info, processor) => {
                     try {
                         this.notify({ eventName: 'frame', object: this, image, info, processor });
                     } catch (err) {
                         console.log('process error', err, err.stack);
                     }
                 }
-            }));
+            });
         }
     }
     detachProcessor() {