updated CaptureView example to display video recording duration

Examples/Programmatic/CaptureView/CaptureView/ViewController.swift

@@ -35,7 +35,9 @@ class ViewController: UIViewController, CapturePreviewViewDelegate, CaptureSessi
 	private lazy var flashButton: FlatButton = FlatButton()
 	private lazy var closeButton: FlatButton = FlatButton()
 	
-	private lazy var captureMode: CaptureMode = .Photo
+	private lazy var captureMode: CaptureMode = .Video
+	
+	private var timer: NSTimer?
 	
 	override func viewDidLoad() {
 		super.viewDidLoad()
@@ -66,6 +68,24 @@ class ViewController: UIViewController, CapturePreviewViewDelegate, CaptureSessi
 		navigationBarView.shadowDepth = .None
 		navigationBarView.statusBarStyle = .LightContent
 		
+		// Title label.
+		let titleLabel: UILabel = UILabel()
+		titleLabel.text = "00:00:00"
+		titleLabel.textAlignment = .Left
+		titleLabel.textColor = MaterialColor.white
+		titleLabel.font = RobotoFont.regularWithSize(20)
+		navigationBarView.titleLabel = titleLabel
+		navigationBarView.titleLabelInsetsRef.left = 64
+		
+		// Detail label
+		let detailLabel: UILabel = UILabel()
+		detailLabel.text = "Stopped"
+		detailLabel.textAlignment = .Left
+		detailLabel.textColor = MaterialColor.white
+		detailLabel.font = RobotoFont.regularWithSize(12)
+		navigationBarView.detailLabel = detailLabel
+		navigationBarView.detailLabelInsetsRef.left = 64
+		
 		view.addSubview(navigationBarView)
 		navigationBarView.leftButtons = [closeButton]
 		navigationBarView.rightButtons = [switchCameraButton, flashButton]
@@ -77,7 +97,7 @@ class ViewController: UIViewController, CapturePreviewViewDelegate, CaptureSessi
 	private func prepareCaptureButton() {
 		captureButton.pulseColor = MaterialColor.white
 		captureButton.pulseFill = true
-		captureButton.backgroundColor = MaterialColor.blue.darken1.colorWithAlphaComponent(0.3)
+		captureButton.backgroundColor = MaterialColor.red.darken1.colorWithAlphaComponent(0.3)
 		captureButton.borderWidth = .Border2
 		captureButton.borderColor = MaterialColor.white
 		captureButton.shadowDepth = .None
@@ -179,8 +199,10 @@ class ViewController: UIViewController, CapturePreviewViewDelegate, CaptureSessi
 		} else if .Video == captureMode {
 			if captureView.captureSession.isRecording {
 				captureView.captureSession.stopRecording()
+				stopTimer()
 			} else {
 				captureView.captureSession.startRecording()
+				startTimer()
 			}
 		}
 	}
@@ -207,22 +229,24 @@ class ViewController: UIViewController, CapturePreviewViewDelegate, CaptureSessi
 	:name:	handleFlashButton
 	*/
 	internal func handleFlashButton(button: UIButton) {
-		var img: UIImage?
-		
-		switch captureView.captureSession.flashMode {
-		case .Off:
-			img = UIImage(named: "ic_flash_on_white")
-			captureView.captureSession.flashMode = .On
-		case .On:
-			img = UIImage(named: "ic_flash_auto_white")
-			captureView.captureSession.flashMode = .Auto
-		case .Auto:
-			img = UIImage(named: "ic_flash_off_white")
-			captureView.captureSession.flashMode = .Off
+		if .Back == captureView.captureSession.cameraPosition {
+			var img: UIImage?
+			
+			switch captureView.captureSession.flashMode {
+			case .Off:
+				img = UIImage(named: "ic_flash_on_white")
+				captureView.captureSession.flashMode = .On
+			case .On:
+				img = UIImage(named: "ic_flash_auto_white")
+				captureView.captureSession.flashMode = .Auto
+			case .Auto:
+				img = UIImage(named: "ic_flash_off_white")
+				captureView.captureSession.flashMode = .Off
+			}
+			
+			flashButton.setImage(img, forState: .Normal)
+			flashButton.setImage(img, forState: .Highlighted)
 		}
-		
-		flashButton.setImage(img, forState: .Normal)
-		flashButton.setImage(img, forState: .Highlighted)
 	}
 	
 	/**
@@ -231,6 +255,8 @@ class ViewController: UIViewController, CapturePreviewViewDelegate, CaptureSessi
 	func handleCameraButton(button: UIButton) {
 		captureButton.backgroundColor = MaterialColor.blue.darken1.colorWithAlphaComponent(0.3)
 		captureMode = .Photo
+		navigationBarView.titleLabel!.text = ""
+		navigationBarView.detailLabel!.text = ""
 	}
 	
 	/**
@@ -239,6 +265,8 @@ class ViewController: UIViewController, CapturePreviewViewDelegate, CaptureSessi
 	func handleVideoButton(button: UIButton) {
 		captureButton.backgroundColor = MaterialColor.red.darken1.colorWithAlphaComponent(0.3)
 		captureMode = .Video
+		navigationBarView.titleLabel!.text = "00:00:00"
+		navigationBarView.detailLabel!.text = "Stopped"
 	}
 	
 	/**
@@ -249,6 +277,30 @@ class ViewController: UIViewController, CapturePreviewViewDelegate, CaptureSessi
 	}
 	
 	/**
+	:name:	captureSessionWillSwitchCameras
+	*/
+	func captureSessionWillSwitchCameras(capture: CaptureSession, position: AVCaptureDevicePosition) {
+		if .Back == position {
+			let img: UIImage? = UIImage(named: "ic_flash_off_white")
+			captureView.captureSession.flashMode = .Off
+			flashButton.setImage(img, forState: .Normal)
+			flashButton.setImage(img, forState: .Highlighted)
+		}
+	}
+	
+	/**
+	:name:	captureSessionDidSwitchCameras
+	*/
+	func captureSessionDidSwitchCameras(capture: CaptureSession, position: AVCaptureDevicePosition) {
+		if .Back == position {
+			let img: UIImage? = UIImage(named: "ic_flash_auto_white")
+			captureView.captureSession.flashMode = .Auto
+			flashButton.setImage(img, forState: .Normal)
+			flashButton.setImage(img, forState: .Highlighted)
+		}
+	}
+	
+	/**
 	:name:	captureStillImageAsynchronously
 	*/
 	func captureStillImageAsynchronously(capture: CaptureSession, image: UIImage) {
@@ -275,5 +327,41 @@ class ViewController: UIViewController, CapturePreviewViewDelegate, CaptureSessi
 	func captureDidFinishRecordingToOutputFileAtURL(capture: CaptureSession, captureOutput: AVCaptureFileOutput, outputFileURL: NSURL, fromConnections connections: [AnyObject], error: NSError!) {
 		print("Capture Stopped Recording \(outputFileURL)")
 	}
+	
+	/**
+	:name:	startTimer
+	*/
+	func startTimer() {
+		timer?.invalidate()
+		timer = NSTimer(timeInterval: 0.5, target: self, selector: "updateTimer", userInfo: nil, repeats: true)
+		NSRunLoop.mainRunLoop().addTimer(timer!, forMode: NSRunLoopCommonModes)
+		navigationBarView.detailLabel!.textColor = MaterialColor.red.accent1
+		captureButton.backgroundColor = MaterialColor.red.darken4.colorWithAlphaComponent(0.3)
+	}
+	
+	/**
+	:name:	updateTimer
+	*/
+	func updateTimer() {
+		let duration: CMTime = captureView.captureSession.recordedDuration
+		let time: Double = CMTimeGetSeconds(duration)
+		let hours: Int = Int(time / 3600)
+		let minutes: Int = Int((time / 60) % 60)
+		let seconds: Int = Int(time % 60)
+		navigationBarView.titleLabel!.text = String(format: "%02i:%02i:%02i", arguments: [hours, minutes, seconds])
+		navigationBarView.detailLabel!.text = "Recording"
+	}
+	
+	/**
+	:name:	stopTimer
+	*/
+	func stopTimer() {
+		timer?.invalidate()
+		timer = nil
+		navigationBarView.titleLabel!.text = "00:00:00"
+		navigationBarView.detailLabel!.text = "Stopped"
+		navigationBarView.detailLabel!.textColor = MaterialColor.white
+		captureButton.backgroundColor = MaterialColor.red.darken1.colorWithAlphaComponent(0.3)
+	}
 }
 

Sources/CaptureSession.swift

@@ -80,6 +80,16 @@ public protocol CaptureSessionDelegate {
 	optional func captureSessionFailedWithError(capture: CaptureSession, error: NSError)
 	
 	/**
+	:name:	captureSessionDidSwitchCameras
+	*/
+	optional func captureSessionDidSwitchCameras(capture: CaptureSession, position: AVCaptureDevicePosition)
+	
+	/**
+	:name:	captureSessionWillSwitchCameras
+	*/
+	optional func captureSessionWillSwitchCameras(capture: CaptureSession, position: AVCaptureDevicePosition)
+	
+	/**
 	:name:	captureStillImageAsynchronously
 	*/
 	optional func captureStillImageAsynchronously(capture: CaptureSession, image: UIImage)
@@ -158,6 +168,13 @@ public class CaptureSession : NSObject, AVCaptureFileOutputRecordingDelegate {
 	public private(set) lazy var isRecording: Bool = false
 	
 	/**
+	:name:	recordedDuration
+	*/
+	public var recordedDuration: CMTime {
+		return movieOutput.recordedDuration
+	}
+	
+	/**
 	:name:	activeCamera
 	*/
 	public var activeCamera: AVCaptureDevice? {
@@ -377,22 +394,22 @@ public class CaptureSession : NSObject, AVCaptureFileOutputRecordingDelegate {
 	*/
 	public func switchCameras() {
 		if canSwitchCameras {
-			dispatch_async(videoQueue) {
-				do {
-					let videoInput: AVCaptureDeviceInput? = try AVCaptureDeviceInput(device: self.inactiveCamera!)
-					self.session.beginConfiguration()
-					self.session.removeInput(self.activeVideoInput)
-					
-					if self.session.canAddInput(videoInput) {
-						self.session.addInput(videoInput)
-						self.activeVideoInput = videoInput
-					} else {
-						self.session.addInput(self.activeVideoInput)
-					}
-					self.session.commitConfiguration()
-				} catch let e as NSError {
-					self.delegate?.captureSessionFailedWithError?(self, error: e)
+			do {
+				self.delegate?.captureSessionWillSwitchCameras?(self, position: self.cameraPosition)
+				let videoInput: AVCaptureDeviceInput? = try AVCaptureDeviceInput(device: self.inactiveCamera!)
+				self.session.beginConfiguration()
+				self.session.removeInput(self.activeVideoInput)
+				
+				if self.session.canAddInput(videoInput) {
+					self.session.addInput(videoInput)
+					self.activeVideoInput = videoInput
+				} else {
+					self.session.addInput(self.activeVideoInput)
 				}
+				self.session.commitConfiguration()
+				self.delegate?.captureSessionDidSwitchCameras?(self, position: self.cameraPosition)
+			} catch let e as NSError {
+				self.delegate?.captureSessionFailedWithError?(self, error: e)
 			}
 		}
 	}
@@ -541,28 +558,26 @@ public class CaptureSession : NSObject, AVCaptureFileOutputRecordingDelegate {
 	:name:	startRecording
 	*/
 	public func startRecording() {
-		dispatch_async(videoQueue) {
-			if !self.isRecording {
-				let connection: AVCaptureConnection = self.movieOutput.connectionWithMediaType(AVMediaTypeVideo)
-				connection.videoOrientation = self.currentVideoOrientation
-				connection.preferredVideoStabilizationMode = .Auto
-				
-				let device: AVCaptureDevice = self.activeCamera!
-				if device.smoothAutoFocusSupported {
-					do {
-						try device.lockForConfiguration()
-						device.smoothAutoFocusEnabled = true
-						device.unlockForConfiguration()
-					} catch let e as NSError {
-						self.delegate?.captureSessionFailedWithError?(self, error: e)
-					}
-				}
-				
-				self.movieOutputURL = self.uniqueURL()
-				if let v: NSURL = self.movieOutputURL {
-					self.movieOutput.startRecordingToOutputFileURL(v, recordingDelegate: self)
+		if !self.isRecording {
+			let connection: AVCaptureConnection = self.movieOutput.connectionWithMediaType(AVMediaTypeVideo)
+			connection.videoOrientation = self.currentVideoOrientation
+			connection.preferredVideoStabilizationMode = .Auto
+			
+			let device: AVCaptureDevice = self.activeCamera!
+			if device.smoothAutoFocusSupported {
+				do {
+					try device.lockForConfiguration()
+					device.smoothAutoFocusEnabled = true
+					device.unlockForConfiguration()
+				} catch let e as NSError {
+					self.delegate?.captureSessionFailedWithError?(self, error: e)
 				}
 			}
+			
+			self.movieOutputURL = self.uniqueURL()
+			if let v: NSURL = self.movieOutputURL {
+				self.movieOutput.startRecordingToOutputFileURL(v, recordingDelegate: self)
+			}
 		}
 	}