minor performance improvements

.swift-version

@@ -0,0 +1 @@
+echo "4.0" > .swift-version

ARVideoKit.podspec

@@ -5,7 +5,7 @@ Pod::Spec.new do |s|
   s.description  = "Enabling developers to capture videos 📹, photos 🌄, Live Photos 🎇, and GIFs 🎆 with augmented reality components."
   s.homepage     = "https://github.com/AFathi/ARVideoKit"
   s.screenshots  = "http://www.ahmedbekhit.com/SK_PREV.gif", "http://www.ahmedbekhit.com/SCN_PREVIEW.gif"
-  s.swift_version = '4.2'
+
 
 
   s.license      = { :type => "Apache 2.0", :file => "LICENSE" }

ARVideoKit.xcodeproj/project.pbxproj

@@ -7,7 +7,6 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
-		B466A8B82279E34C00BD7070 /* WeakProxy.swift in Sources */ = {isa = PBXBuildFile; fileRef = B466A8B72279E34C00BD7070 /* WeakProxy.swift */; };
 		FB2E36891FAE29C00035B8D6 /* LICENSE in Resources */ = {isa = PBXBuildFile; fileRef = FB2E36881FAE29BF0035B8D6 /* LICENSE */; };
 		FB404FFE20D72A190056EA1D /* JPEG.swift in Sources */ = {isa = PBXBuildFile; fileRef = FB404FFD20D72A190056EA1D /* JPEG.swift */; };
 		FBD604DF1FA969DD00EC9804 /* ARVideoKit.h in Headers */ = {isa = PBXBuildFile; fileRef = FBD604DD1FA969DD00EC9804 /* ARVideoKit.h */; settings = {ATTRIBUTES = (Public, ); }; };
@@ -34,7 +33,6 @@
 /* End PBXBuildFile section */
 
 /* Begin PBXFileReference section */
-		B466A8B72279E34C00BD7070 /* WeakProxy.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = WeakProxy.swift; sourceTree = "<group>"; };
 		FB2E36881FAE29BF0035B8D6 /* LICENSE */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = LICENSE; sourceTree = "<group>"; };
 		FB404FFD20D72A190056EA1D /* JPEG.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = JPEG.swift; sourceTree = "<group>"; };
 		FBD604DA1FA969DD00EC9804 /* ARVideoKit.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = ARVideoKit.framework; sourceTree = BUILT_PRODUCTS_DIR; };
@@ -73,14 +71,6 @@
 /* End PBXFrameworksBuildPhase section */
 
 /* Begin PBXGroup section */
-		B466A8B62279E33800BD7070 /* Utils */ = {
-			isa = PBXGroup;
-			children = (
-				B466A8B72279E34C00BD7070 /* WeakProxy.swift */,
-			);
-			path = Utils;
-			sourceTree = "<group>";
-		};
 		FBA0AA0A1FAD9D9D006C481B /* Writer */ = {
 			isa = PBXGroup;
 			children = (
@@ -109,7 +99,6 @@
 		FBD604DC1FA969DD00EC9804 /* ARVideoKit */ = {
 			isa = PBXGroup;
 			children = (
-				B466A8B62279E33800BD7070 /* Utils */,
 				FBD604E51FA96ACD00EC9804 /* Assets */,
 				FBD604E61FA96AD400EC9804 /* Enumerations */,
 				FBD604E71FA96AE500EC9804 /* Extensions */,
@@ -301,7 +290,6 @@
 				FBD604F51FA96B3300EC9804 /* UIImage+VideoBuffer.swift in Sources */,
 				FBD605111FA96BA100EC9804 /* ARView.swift in Sources */,
 				FBD604F61FA96B3300EC9804 /* CGImage+Resize.swift in Sources */,
-				B466A8B82279E34C00BD7070 /* WeakProxy.swift in Sources */,
 				FBD604F91FA96B3300EC9804 /* UIViewController+hasType.swift in Sources */,
 				FBD605141FA96BA100EC9804 /* ViewAR.swift in Sources */,
 				FBD604EE1FA96B2700EC9804 /* ARVideoOptions.swift in Sources */,
@@ -462,7 +450,7 @@
 				PRODUCT_NAME = "$(TARGET_NAME:c99extidentifier)";
 				SKIP_INSTALL = YES;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				SWIFT_VERSION = 4.2;
+				SWIFT_VERSION = 4.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Debug;
@@ -487,7 +475,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.ahmedbekhit.ARVideoKit;
 				PRODUCT_NAME = "$(TARGET_NAME:c99extidentifier)";
 				SKIP_INSTALL = YES;
-				SWIFT_VERSION = 4.2;
+				SWIFT_VERSION = 4.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Release;

ARVideoKit/Info.plist

@@ -17,7 +17,7 @@
 	<key>CFBundlePackageType</key>
 	<string>FMWK</string>
 	<key>CFBundleShortVersionString</key>
-	<string>1.32</string>
+	<string>1.31</string>
 	<key>CFBundleVersion</key>
 	<string>$(CURRENT_PROJECT_VERSION)</string>
 	<key>NSPrincipalClass</key>

ARVideoKit/Protocols/RecordARDelegate.swift

@@ -28,25 +28,12 @@ import ARKit
      - parameter noError: A boolean that returns true when the recorder ends without errors. Otherwise, it returns false.
      */
     func recorder(didEndRecording path: URL, with noError: Bool)
-    
     /**
      A protocol method that is triggered when a recorder fails recording.
      - parameter error: An `Error` object that returns the error value.
      - parameter status: A string that returns the reason of the recorder failure in a string literal format.
      */
     func recorder(didFailRecording error: Error?, and status: String)
-  
-    /**
-     A protocol method that is triggered when a recorder is cancelled.
-     - parameter status: A string that returns the reason the of recorder cancelation in a string literal format.
-     */
-    @objc optional func recorder(didCancelRecording status: String)
-    
-    /**
-     A protocol method that is triggered when a recorder is modified.
-     - parameter duration: A double that returns the duration of current recording
-     */
-    @objc optional func recorder(didUpdateRecording duration: TimeInterval)
 
     /**
      A protocol method that is triggered when the application will resign active.

ARVideoKit/Rendering/Live Photo/Generate+LivePhoto.swift

@@ -26,11 +26,11 @@ class LivePhotoGenerator {
             generator.appliesPreferredTrackTransform = true
             
             //retrieves the key photo frame from the middle of the video asset
-            let time = NSValue(time: CMTimeMultiplyByFloat64(asset.duration, multiplier: 0.5))
-
+            let time = NSValue(time: CMTimeMultiplyByFloat64(asset.duration, 0.5))
+            
             //generates the key photo CGImage asynchronously
             generator.generateCGImagesAsynchronously(forTimes: [time], completionHandler: { _, image, _, _, _ in
-                if let cgImg = image, let imgData = UIImage(cgImage: cgImg).pngData() {
+                if let cgImg = image, let imgData = UIImagePNGRepresentation(UIImage(cgImage: cgImg)) {
                     do {
                         self.keyPhotoPath = self.newPath(for: true, and: false)
                         try imgData.write(to: self.keyPhotoPath!, options: [.atomic])

ARVideoKit/Rendering/Live Photo/LoveLiver/QuickTimeMov.swift

@@ -16,7 +16,7 @@ class QuickTimeMov {
     private let kKeyStillImageTime = "com.apple.quicktime.still-image-time"
     private let kKeySpaceQuickTimeMetadata = "mdta"
     private let path: String
-    private let dummyTimeRange = CMTimeRange(start: CMTime(value: 0, timescale: 1000), duration: CMTime(value: 200, timescale: 3000))
+    private let dummyTimeRange = CMTimeRangeMake(CMTimeMake(0, 1000), CMTimeMake(200, 3000))
 
     private lazy var asset: AVURLAsset = {
         let url = URL(fileURLWithPath: self.path)
@@ -128,7 +128,7 @@ class QuickTimeMov {
             // --------------------------------------------------
             writer.startWriting()
             reader.startReading()
-            writer.startSession(atSourceTime: CMTime.zero)
+            writer.startSession(atSourceTime: kCMTimeZero)
             
             // write metadata track
             adapter.append(AVTimedMetadataGroup(items: [metadataForStillImageTime()],
@@ -148,7 +148,7 @@ class QuickTimeMov {
                         input.markAsFinished()
                         if reader.status == .completed && aAudioAsset.tracks.count > 1 {
                             audioReader?.startReading()
-                            writer.startSession(atSourceTime: CMTime.zero)
+                            writer.startSession(atSourceTime: kCMTimeZero)
                             let media_queue = DispatchQueue(label: "assetAudioWriterQueue", attributes: [])
                             audioWriterInput?.requestMediaDataWhenReady(on: media_queue) {
                                 while (audioWriterInput?.isReadyForMoreMediaData)! {
@@ -218,9 +218,7 @@ class QuickTimeMov {
             "com.apple.metadata.datatype.int8"            ]
 
         var desc: CMFormatDescription? = nil
-        CMMetadataFormatDescriptionCreateWithMetadataSpecifications(allocator: kCFAllocatorDefault, metadataType: kCMMetadataFormatType_Boxed, metadataSpecifications: [spec] as CFArray, formatDescriptionOut: &desc)
-
-//        CMFormatDescription.createForMetadata(allocator: kCFAllocatorDefault, metadataType: kCMMetadataFormatType_Boxed, metadataSpecifications: [spec] as CFArray, formatDescriptionOut: &desc)
+        CMMetadataFormatDescriptionCreateWithMetadataSpecifications(kCFAllocatorDefault, kCMMetadataFormatType_Boxed, [spec] as CFArray, &desc)
         let input = AVAssetWriterInput(mediaType: AVMediaType.metadata,
             outputSettings: nil, sourceFormatHint: desc)
         return AVAssetWriterInputMetadataAdaptor(assetWriterInput: input)

ARVideoKit/Rendering/Live Photo/PHLivePhotoPlus.swift

@@ -18,7 +18,7 @@ import Photos
  * [Email](mailto:me@ahmedbekhit.com)
  */
 @available(iOS 9.1, *)
-@objc public class PHLivePhotoPlus: NSObject {
+@objc public class PHLivePhotoPlus: PHLivePhoto {
     var pairedVideoPath: URL?
     var keyPhotoPath: URL?
     

ARVideoKit/Rendering/RenderAR.swift

@@ -9,10 +9,11 @@
 import Foundation
 import ARKit
 
+private var view: Any?
+private var renderEngine: SCNRenderer!
+
 @available(iOS 11.0, *)
 struct RenderAR {
-    private var view: Any?
-    private var renderEngine: SCNRenderer!
     var ARcontentMode: ARFrameMode!
     
     init(_ ARview: Any?, renderer: SCNRenderer, contentMode: ARFrameMode) {
@@ -92,7 +93,9 @@ struct RenderAR {
             } else {
                 renderedFrame = renderEngine.snapshot(atTime: time, with: size, antialiasingMode: .none)
             }
+            
             guard let buffer = renderedFrame!.buffer else { return nil }
+            
             return buffer
         } else if view is ARSKView {
             guard let size = bufferSize else { return nil }

ARVideoKit/Rendering/Writer/WritAR.swift

@@ -25,7 +25,7 @@ class WritAR: NSObject, AVCaptureAudioDataOutputSampleBufferDelegate {
 
     private var isRecording: Bool = false
     
-    weak var delegate: RecordARDelegate?
+    var delegate: RecordARDelegate?
     var videoInputOrientation: ARVideoOrientation = .auto
 
     init(output: URL, width: Int, height: Int, adjustForSharing: Bool, audioEnabled: Bool, orientaions:[ARInputViewOrientation], queue: DispatchQueue, allowMix: Bool) {
@@ -33,13 +33,13 @@ class WritAR: NSObject, AVCaptureAudioDataOutputSampleBufferDelegate {
         do {
             assetWriter = try AVAssetWriter(outputURL: output, fileType: AVFileType.mp4)
         } catch {
-            // FIXME: handle when failed to allocate AVAssetWriter.
-            return
+            fatalError("An error occurred while intializing an AVAssetWriter")
         }
+        
         if audioEnabled {
             if allowMix {
-                let audioOptions: AVAudioSession.CategoryOptions = [.mixWithOthers , .allowBluetooth, .defaultToSpeaker, .interruptSpokenAudioAndMixWithOthers]
-                try? AVAudioSession.sharedInstance().setCategory(AVAudioSession.Category.playAndRecord, mode: AVAudioSession.Mode.spokenAudio, options: audioOptions)
+                let audioOptions: AVAudioSessionCategoryOptions = [.mixWithOthers , .allowBluetooth, .defaultToSpeaker, .interruptSpokenAudioAndMixWithOthers]
+                try? AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayAndRecord, with: audioOptions)
                 try? AVAudioSession.sharedInstance().setActive(true)
             }
             AVAudioSession.sharedInstance().requestRecordPermission({ permitted in
@@ -57,15 +57,15 @@ class WritAR: NSObject, AVCaptureAudioDataOutputSampleBufferDelegate {
             AVVideoHeightKey: height as AnyObject
         ]
         
-        let attributes: [String: Bool] = [
-            kCVPixelBufferCGImageCompatibilityKey as String: true,
-            kCVPixelBufferCGBitmapContextCompatibilityKey as String: true
-        ]
+//        let attributes: [String: Bool] = [
+//            kCVPixelBufferCGImageCompatibilityKey as String: true,
+//            kCVPixelBufferCGBitmapContextCompatibilityKey as String: true
+//        ]
         videoInput = AVAssetWriterInput(mediaType: .video, outputSettings: videoOutputSettings)
 
         videoInput.expectsMediaDataInRealTime = true
         pixelBufferInput = AVAssetWriterInputPixelBufferAdaptor(assetWriterInput: videoInput, sourcePixelBufferAttributes: nil)
-        
+
         var angleEnabled: Bool {
             for v in orientaions {
                 if UIDevice.current.orientation.rawValue == v.rawValue {
@@ -141,6 +141,7 @@ class WritAR: NSObject, AVCaptureAudioDataOutputSampleBufferDelegate {
         if session.canAddInput(audioDeviceInput!) {
             session.addInput(audioDeviceInput!)
         }
+        
         if session.canAddOutput(audioDataOutput) {
             session.addOutput(audioDataOutput)
         }
@@ -162,11 +163,34 @@ class WritAR: NSObject, AVCaptureAudioDataOutputSampleBufferDelegate {
     
     var startingVideoTime: CMTime?
     var isWritingWithoutError: Bool?
-    var currentDuration: TimeInterval = 0 // Seconds
     
     func insert(pixel buffer: CVPixelBuffer, with intervals: CFTimeInterval) {
-        let time: CMTime = CMTime(seconds: intervals, preferredTimescale: 1000000)
-        insert(pixel: buffer, with: time)
+        let time: CMTime = CMTimeMakeWithSeconds(intervals, 1000000)
+        if assetWriter.status == .unknown {
+            guard startingVideoTime == nil else {
+                isWritingWithoutError = false
+                return
+            }
+            startingVideoTime = time
+            if assetWriter.startWriting() {
+                assetWriter.startSession(atSourceTime: startingVideoTime!)
+                session.startRunning()
+                isRecording = true
+                isWritingWithoutError = true
+            } else {
+                delegate?.recorder(didFailRecording: assetWriter.error, and: "An error occurred while starting the video session.")
+                isWritingWithoutError = false
+            }
+        } else if assetWriter.status == .failed {
+            delegate?.recorder(didFailRecording: assetWriter.error, and: "Video session failed while recording.")
+            logAR.message("An error occurred while recording the video, status: \(assetWriter.status.rawValue), error: \(assetWriter.error!.localizedDescription)")
+            isWritingWithoutError = false
+            return
+        }
+        if videoInput.isReadyForMoreMediaData {
+            append(pixel: buffer, with: time)
+            isWritingWithoutError = true
+        }
     }
     
     func insert(pixel buffer: CVPixelBuffer, with time: CMTime) {
@@ -178,19 +202,16 @@ class WritAR: NSObject, AVCaptureAudioDataOutputSampleBufferDelegate {
             startingVideoTime = time
             if assetWriter.startWriting() {
                 assetWriter.startSession(atSourceTime: startingVideoTime!)
-                currentDuration = 0
                 isRecording = true
                 isWritingWithoutError = true
             } else {
                 delegate?.recorder(didFailRecording: assetWriter.error, and: "An error occurred while starting the video session.")
-                currentDuration = 0
                 isRecording = false
                 isWritingWithoutError = false
             }
         } else if assetWriter.status == .failed {
             delegate?.recorder(didFailRecording: assetWriter.error, and: "Video session failed while recording.")
             logAR.message("An error occurred while recording the video, status: \(assetWriter.status.rawValue), error: \(assetWriter.error!.localizedDescription)")
-            currentDuration = 0
             isRecording = false
             isWritingWithoutError = false
             return
@@ -198,10 +219,8 @@ class WritAR: NSObject, AVCaptureAudioDataOutputSampleBufferDelegate {
         
         if videoInput.isReadyForMoreMediaData {
             append(pixel: buffer, with: time)
-            currentDuration = time.seconds - startingVideoTime!.seconds
             isRecording = true
             isWritingWithoutError = true
-            delegate?.recorder?(didUpdateRecording: currentDuration)
         }
     }
 
@@ -219,25 +238,13 @@ class WritAR: NSObject, AVCaptureAudioDataOutputSampleBufferDelegate {
         isRecording = false
     }
     
-    func end(writing finished: @escaping () -> Void) {
+    func end(writing finished: @escaping () -> Void){
         if let session = session {
             if session.isRunning {
                 session.stopRunning()
             }
         }
-        
-        if assetWriter.status == .writing {
-            assetWriter.finishWriting(completionHandler: finished)
-        }
-    }
-    
-    func cancel() {
-        if let session = session {
-            if session.isRunning {
-                session.stopRunning()
-            }
-        }
-        assetWriter.cancelWriting()
+        assetWriter.finishWriting(completionHandler: finished)
     }
 }
 

ARVideoKit/Sources/ARView.swift

@@ -20,7 +20,7 @@ import ARKit
  */
 @available(iOS 11.0, *)
 @objc public class ARView: NSObject {
-    private weak var parentVC: UIViewController?
+    private var parentVC: UIViewController?
     private var recentAngle = 0
     private var inputViewOrientation:[ARInputViewOrientation] = []
     
@@ -52,7 +52,7 @@ import ARKit
     
     @objc init?(ARSceneKit: ARSCNView) {
         super.init()
-        NotificationCenter.default.addObserver(self, selector: #selector(deviceDidRotate), name: UIDevice.orientationDidChangeNotification, object: nil)
+        NotificationCenter.default.addObserver(self, selector: #selector(deviceDidRotate), name: NSNotification.Name.UIDeviceOrientationDidChange, object: nil)
         
         let value = UIInterfaceOrientation.portrait.rawValue
         UIDevice.current.setValue(value, forKey: "orientation")
@@ -68,7 +68,7 @@ import ARKit
     
     @objc init?(ARSpriteKit: ARSKView) {
         super.init()
-        NotificationCenter.default.addObserver(self, selector: #selector(deviceDidRotate), name: UIDevice.orientationDidChangeNotification, object: nil)
+        NotificationCenter.default.addObserver(self, selector: #selector(deviceDidRotate), name: NSNotification.Name.UIDeviceOrientationDidChange, object: nil)
         
         let value = UIInterfaceOrientation.portrait.rawValue
         UIDevice.current.setValue(value, forKey: "orientation")
@@ -82,7 +82,7 @@ import ARKit
     
     @objc init?(SceneKit: SCNView) {
         super.init()
-        NotificationCenter.default.addObserver(self, selector: #selector(deviceDidRotate), name: UIDevice.orientationDidChangeNotification, object: nil)
+        NotificationCenter.default.addObserver(self, selector: #selector(deviceDidRotate), name: NSNotification.Name.UIDeviceOrientationDidChange, object: nil)
         
         let value = UIInterfaceOrientation.portrait.rawValue
         UIDevice.current.setValue(value, forKey: "orientation")

ARVideoKit/Sources/RecordAR.swift

@@ -12,6 +12,13 @@ import ARKit
 import Photos
 import PhotosUI
 
+private var view: Any?
+private var renderEngine: SCNRenderer!
+private var gpuLoop: CADisplayLink!
+private var isResting = false
+private var ARcontentMode: ARFrameMode!
+@available(iOS 11.0, *)
+private var renderer: RenderAR!
 /**
  This class renders the `ARSCNView` or `ARSKView` content with the device's camera stream to generate a video 📹, photo 🌄, live photo 🎇 or GIF 🎆.
 
@@ -27,11 +34,11 @@ import PhotosUI
     /**
      An object that passes the AR recorder errors and status in the protocol methods.
      */
-    @objc public var delegate: RecordARDelegate?
+    @objc public weak var delegate: RecordARDelegate?
     /**
      An object that passes the AR rendered content in the protocol method.
      */
-    @objc public var renderAR: RenderARDelegate?
+    @objc public weak var renderAR: RenderARDelegate?
     /**
      An object that returns the AR recorder current status.
      */
@@ -148,11 +155,6 @@ import PhotosUI
         view = SceneKit
         setup()
     }
-
-    //MARK: - Deinit
-    deinit {
-        gpuLoop.invalidate()
-    }
     
     //MARK: - threads
     let writerQueue = DispatchQueue(label:"com.ahmedbekhit.WriterQueue")
@@ -160,13 +162,6 @@ import PhotosUI
     let audioSessionQueue = DispatchQueue(label: "com.ahmedbekhit.AudioSessionQueue", attributes: .concurrent)
     
     //MARK: - Objects
-    private var view: Any?
-    private var renderEngine: SCNRenderer!
-    private var gpuLoop: CADisplayLink!
-    private var isResting = false
-    private var ARcontentMode: ARFrameMode!
-    private var renderer: RenderAR!
-
     private var scnView: SCNView!
     private var fileCount = 0
     
@@ -225,11 +220,10 @@ import PhotosUI
             }
             renderEngine = SCNRenderer(device: mtlDevice, options: nil)
             renderEngine.scene = view.scene
-
-            gpuLoop = CADisplayLink(target: WeakProxy(target: self),
-                                    selector: #selector(renderFrame))
+            
+            gpuLoop = CADisplayLink(target: self, selector: #selector(renderFrame))
             gpuLoop.preferredFramesPerSecond = fps.rawValue
-            gpuLoop.add(to: .main, forMode: .common)
+            gpuLoop.add(to: .main, forMode: .commonModes)
             
             status = .readyToRecord
         } else if let view = view as? ARSKView {
@@ -249,11 +243,10 @@ import PhotosUI
             
             renderEngine = SCNRenderer(device: mtlDevice, options: nil)
             renderEngine.scene = scnView.scene
-
-            gpuLoop = CADisplayLink(target: WeakProxy(target: self),
-                                    selector: #selector(renderFrame))
+            
+            gpuLoop = CADisplayLink(target: self, selector: #selector(renderFrame))
             gpuLoop.preferredFramesPerSecond = fps.rawValue
-            gpuLoop.add(to: .main, forMode: .common)
+            gpuLoop.add(to: .main, forMode: .commonModes)
             
             status = .readyToRecord
         } else if let view = view as? SCNView {
@@ -263,11 +256,10 @@ import PhotosUI
             }
             renderEngine = SCNRenderer(device: mtlDevice, options: nil)
             renderEngine.scene = view.scene
-
-            gpuLoop = CADisplayLink(target: WeakProxy(target: self),
-                                    selector: #selector(renderFrame))
+            
+            gpuLoop = CADisplayLink(target: self, selector: #selector(renderFrame))
             gpuLoop.preferredFramesPerSecond = fps.rawValue
-            gpuLoop.add(to: .main, forMode: .common)
+            gpuLoop.add(to: .main, forMode: .commonModes)
             
             status = .readyToRecord
         }
@@ -276,7 +268,7 @@ import PhotosUI
         
         renderer = RenderAR(view, renderer: renderEngine, contentMode: contentMode)
 
-        NotificationCenter.default.addObserver(self, selector: #selector(appWillEnterBackground), name: UIApplication.willResignActiveNotification, object: nil)
+        NotificationCenter.default.addObserver(self, selector: #selector(appWillEnterBackground), name: Notification.Name.UIApplicationWillResignActive, object: nil)
     }
     
     
@@ -521,39 +513,6 @@ import PhotosUI
             }
         }
     }
-    
-    /**
-     A method that cancels ⏹ recording a video 📹.
-     
-     - parameter finished: A block that will be called when the specified `duration` has ended.
-     
-     */
-    @objc public func cancel() {
-        writerQueue.sync {
-            isRecording = false
-            adjustPausedTime = false
-            backFromPause = false
-            recordingWithLimit = false
-            
-            pausedFrameTime = nil
-            resumeFrameTime = nil
-            
-            DispatchQueue.main.async {
-                self.writer?.cancel()
-                if let path = self.currentVideoPath {
-                    logAR.remove(from: path)
-                    self.delegate?.recorder?(didCancelRecording: "Recording was cancelled manually.")
-                    self.status = .readyToRecord
-                } else {
-                    self.status = .readyToRecord
-                    self.delegate?.recorder(didFailRecording: errSecDecode as? Error, and: "An error occured while stopping your video.")
-                }
-                self.writer = nil
-            }
-        }
-    }
-    
-    
     /**
      A method that exports a video 📹 file path to the Photo Library 📲💾.
      
@@ -765,8 +724,7 @@ extension RecordAR {
         renderer.ARcontentMode = contentMode
 
         self.writerQueue.sync {
-            
-            var time: CMTime { return CMTime(seconds: renderer.time, preferredTimescale: 1000000) }
+            var time: CMTime { return CMTimeMakeWithSeconds(renderer.time, 1000000) }
             
             self.renderAR?.frame(didRender: buffer, with: time, using: rawBuffer)
 
@@ -815,10 +773,8 @@ extension RecordAR {
 
                 self.adjustPausedTime = false
                 
-                if self.pausedFrameTime != nil && self.resumeFrameTime != nil {
-                    self.pausedFrameTime = self.adjustTime(current: time,
-                                                           resume: self.resumeFrameTime!,
-                                                           pause: self.pausedFrameTime!)
+                if self.pausedFrameTime != nil {
+                    self.pausedFrameTime = self.adjustTime(current: time, resume: self.resumeFrameTime!, pause: self.pausedFrameTime!)
                 } else {
                     self.pausedFrameTime = time
                 }

ARVideoKit/Utils/WeakProxy.swift

@@ -1,26 +0,0 @@
-//
-//  SSSS.swift
-//  ARVideoKit
-//
-//  Created by Saul Moreno Abril on 01/05/2019.
-//  Copyright © 2019 Ahmed Fathit Bekhit. All rights reserved.
-//
-
-import Foundation
-
-class WeakProxy: NSObject {
-    weak var target: NSObjectProtocol?
-
-    init(target: NSObjectProtocol) {
-        self.target = target
-        super.init()
-    }
-
-    override func responds(to aSelector: Selector!) -> Bool {
-        return (target?.responds(to: aSelector) ?? false) || super.responds(to: aSelector)
-    }
-
-    override func forwardingTarget(for aSelector: Selector!) -> Any? {
-        return target
-    }
-}

Examples/Swift/ARVideoKit-Example.xcodeproj/project.pbxproj

@@ -429,7 +429,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.ahmedbekhit.ARVideoKit-Example";
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 4.2;
+				SWIFT_VERSION = 4.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Debug;
@@ -451,7 +451,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.ahmedbekhit.ARVideoKit-Example";
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 4.2;
+				SWIFT_VERSION = 4.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Release;

Examples/Swift/ARVideoKit-Example/AppDelegate.swift

@@ -19,7 +19,8 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
         return ViewAR.orientation
     }
     
-    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {
+    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
+        // Override point for customization after application launch.
         return true
     }
 

Examples/Swift/ARVideoKit-Example/View Controllers/SCNViewController.swift

@@ -115,7 +115,7 @@ class SCNViewController: UIViewController, ARSCNViewDelegate, RenderARDelegate,
         }else if status == .denied || status == .restricted || status == .notDetermined {
             let errorView = UIAlertController(title: "😅", message: "Please allow access to the photo library in order to save this media file.", preferredStyle: .alert)
             let settingsBtn = UIAlertAction(title: "Open Settings", style: .cancel) { (_) -> Void in
-                guard let settingsUrl = URL(string: UIApplication.openSettingsURLString) else {
+                guard let settingsUrl = URL(string: UIApplicationOpenSettingsURLString) else {
                     return
                 }
                 if UIApplication.shared.canOpenURL(settingsUrl) {
@@ -123,11 +123,11 @@ class SCNViewController: UIViewController, ARSCNViewDelegate, RenderARDelegate,
                         UIApplication.shared.open(settingsUrl, completionHandler: { (success) in
                         })
                     } else {
-                        UIApplication.shared.openURL(URL(string:UIApplication.openSettingsURLString)!)
+                        UIApplication.shared.openURL(URL(string:UIApplicationOpenSettingsURLString)!)
                     }
                 }
             }
-            errorView.addAction(UIAlertAction(title: "Later", style: UIAlertAction.Style.default, handler: {
+            errorView.addAction(UIAlertAction(title: "Later", style: UIAlertActionStyle.default, handler: {
                 (UIAlertAction)in
             }))
             errorView.addAction(settingsBtn)

Examples/Swift/ARVideoKit-Example/View Controllers/SKViewController.swift

@@ -106,7 +106,7 @@ class SKViewController: UIViewController, ARSKViewDelegate, RenderARDelegate, Re
         }else if status == .denied || status == .restricted || status == .notDetermined {
             let errorView = UIAlertController(title: "😅", message: "Please allow access to the photo library in order to save this media file.", preferredStyle: .alert)
             let settingsBtn = UIAlertAction(title: "Open Settings", style: .cancel) { (_) -> Void in
-                guard let settingsUrl = URL(string: UIApplication.openSettingsURLString) else {
+                guard let settingsUrl = URL(string: UIApplicationOpenSettingsURLString) else {
                     return
                 }
                 if UIApplication.shared.canOpenURL(settingsUrl) {
@@ -114,11 +114,11 @@ class SKViewController: UIViewController, ARSKViewDelegate, RenderARDelegate, Re
                         UIApplication.shared.open(settingsUrl, completionHandler: { (success) in
                         })
                     } else {
-                        UIApplication.shared.openURL(URL(string:UIApplication.openSettingsURLString)!)
+                        UIApplication.shared.openURL(URL(string:UIApplicationOpenSettingsURLString)!)
                     }
                 }
             }
-            errorView.addAction(UIAlertAction(title: "Later", style: UIAlertAction.Style.default, handler: {
+            errorView.addAction(UIAlertAction(title: "Later", style: UIAlertActionStyle.default, handler: {
                 (UIAlertAction)in
             }))
             errorView.addAction(settingsBtn)

README.md

@@ -1,6 +1,4 @@
-> Use [swift_5](https://github.com/AFathi/ARVideoKit/tree/swift_5) branch for projects written in Swift 5
-
-> Use [master](https://github.com/AFathi/ARVideoKit/tree/master) branch for projects written in Swift 4.0
+> Use [swift_4_2](https://github.com/AFathi/ARVideoKit/tree/swift_4_2) branch for projects written in Swift 4.2
 
 ![intro image](http://www.ahmedbekhit.com/projects/repo-header-arvideokit.png)