Couple issue with custom camera - swift

Question

I currently have a custom camera implemented into my application. I am running into two small issues.
1) When I switch b/w the views of the camera (front & back) the audio input dies, and only records video.
2) My method for deciding which camera view (front & back) is which, is depreciated, & I don't know how to exactly go about resolving it. For this one, the code is as follows: The depreciated part is the devices is storing as its variables. xCode is telling me: "Use AVCaptureDeviceDiscoverySession instead."
let devices = AVCaptureDevice.devices(withMediaType: AVMediaTypeVideo) as! [AVCaptureDevice]
// Get the front and back-facing camera for taking photos
for device in devices {
if device.position == AVCaptureDevicePosition.back {
backFacingCamera = device
} else if device.position == AVCaptureDevicePosition.front {
frontFacingCamera = device
}
}
currentDevice = backFacingCamera
guard let captureDeviceInput = try? AVCaptureDeviceInput(device: currentDevice) else {
return
}
As for the general camera recording here are the codes:
My Variables:
let captureSession = AVCaptureSession()
var currentDevice:AVCaptureDevice?
var backFacingCamera: AVCaptureDevice?
var frontFacingCamera: AVCaptureDevice?
var videoFileOutput : AVCaptureMovieFileOutput?
var cameraPreviewLayer : AVCaptureVideoPreviewLayer?
#IBOutlet weak var recordingView: UIView!
switching cameras:
var device = AVCaptureDevice.defaultDevice(withDeviceType: .builtInWideAngleCamera, mediaType: AVMediaTypeVideo, position: .back)
func switchCameras() {
captureSession.beginConfiguration()
// Change the device based on the current camera
let newDevice = (currentDevice?.position == AVCaptureDevicePosition.back) ? frontFacingCamera : backFacingCamera
// Remove all inputs from the session
for input in captureSession.inputs {
captureSession.removeInput(input as! AVCaptureDeviceInput)
}
// Change to the new input
let cameraInput:AVCaptureDeviceInput
do {
cameraInput = try AVCaptureDeviceInput(device: newDevice)
} catch {
print(error)
return
}
if captureSession.canAddInput(cameraInput) {
captureSession.addInput(cameraInput)
}
currentDevice = newDevice
captureSession.commitConfiguration()
if currentDevice?.position == .front {
flashButton.isHidden = true
flashButton.isEnabled = false
} else if currentDevice?.position == .back {
flashButton.isHidden = false
flashButton.isEnabled = true
}
}
& In my view will appear:
mediaViewCapture.frame = CGRect(x: self.view.frame.size.width * 0, y: self.view.frame.size.height * 0, width:self.view.frame.size.width, height: self.view.frame.size.height)
self.view.addSubview(mediaViewCapture)
captureSession.sessionPreset = AVCaptureSessionPresetHigh
let devices = AVCaptureDevice.devices(withMediaType: AVMediaTypeVideo) as! [AVCaptureDevice]
// Get the front and back-facing camera for taking photos
for device in devices {
if device.position == AVCaptureDevicePosition.back {
backFacingCamera = device
} else if device.position == AVCaptureDevicePosition.front {
frontFacingCamera = device
}
}
currentDevice = backFacingCamera
guard let captureDeviceInput = try? AVCaptureDeviceInput(device: currentDevice) else {
return
}
let audioInputDevice = AVCaptureDevice.defaultDevice(withMediaType: AVMediaTypeAudio)
do
{
let audioInput = try AVCaptureDeviceInput(device: audioInputDevice)
// Add Audio Input
if captureSession.canAddInput(audioInput)
{
captureSession.addInput(audioInput)
}
else
{
NSLog("Can't Add Audio Input")
}
}
catch let error
{
NSLog("Error Getting Input Device: \(error)")
}
videoFileOutput = AVCaptureMovieFileOutput()
captureSession.addInput(captureDeviceInput)
captureSession.addOutput(videoFileOutput)
cameraPreviewLayer = AVCaptureVideoPreviewLayer(session: captureSession)
view.layer.addSublayer(cameraPreviewLayer!)
cameraPreviewLayer?.videoGravity = AVLayerVideoGravityResizeAspectFill
cameraPreviewLayer?.frame = mediaViewCapture.layer.frame
captureSession.startRunning()
& Finally my capture:
func capture(_ captureOutput: AVCaptureFileOutput!, didFinishRecordingToOutputFileAt outputFileURL: URL!, fromConnections connections: [Any]!, error: Error!) {
if error == nil {
turnFlashOff()
let videoVC = VideoPreviewVC()
videoVC.url = outputFileURL
self.navigationController?.pushViewController(videoVC, animated: false)
} else {
print("Error saving the video \(error)")
}
}

Answer 1

You can look use AVCaptureDeviceDiscoverySession instead of AVCaptureDevice as it is deprecated following is the code for it:
let deviceDiscovery = AVCaptureDeviceDiscoverySession(deviceTypes: [AVCaptureDeviceType.builtInWideAngleCamera], mediaType: AVMediaTypeVideo, position: .back)
let devices = deviceDiscovery?.devices
for device in devices! {
if device.hasMediaType(AVMediaTypeVideo) {
captureDevice = device
}
}
AVCaptureDeviceType has following types: builtInMicrophone, builtInWideAngleCamera, builtInTelephotoCamera, builtInDualCamera and builtInDuoCamera.
Need to check the audioInput issue when camera is switched.