I have zoom feature working(1x onwards) for custom camera implemented using AVFoundation. This is fine till the iPhone X models. But I wanted to have 0.5x zoom in iPhone 11 and iPhone 11 Pro devices.
Code that I wrote is not working to put it to 0.5x zoom. I have tried all the possible combinations of [.builtInTripleCamera, .builtInDualWideCamera, .builtInUltraWideCamera]. The capture device with the device type .builtinUltraWideCamera is not giving 0.5 for minAvailableVideoZoomFactor.
While testing on iPhone 11, I also removed [.builtInDualCamera, .builtInTelephotoCamera, .builtInWideAngleCamera, .builtInTrueDepthCamera] from the deviceTypes.
Appreciate any help to solve this. Below is the code which is working for 1x zoom onwards.
/// Called from -handlePinchGesture
private func zoom(_ scale: CGFloat) {
let captureDevice = cameraDevice(.back)
do {
try captureDevice?.lockForConfiguration()
var minZoomFactor: CGFloat = captureDevice?.minAvailableVideoZoomFactor ?? 1.0
let maxZoomFactor: CGFloat = captureDevice?.maxAvailableVideoZoomFactor ?? 1.0
if #available(iOS 13.0, *) {
if captureDevice?.deviceType == .builtInDualWideCamera || captureDevice?.deviceType == .builtInTripleCamera || captureDevice?.deviceType == .builtInUltraWideCamera {
minZoomFactor = 0.5
}
}
zoomScale = max(minZoomFactor, min(beginZoomScale * scale, maxZoomFactor))
captureDevice?.videoZoomFactor = zoomScale
captureDevice?.unlockForConfiguration()
} catch {
print("ERROR: locking configuration")
}
}
@objc private func handlePinchGesture(_ recognizer: UIPinchGestureRecognizer) {
var allTouchesOnPreviewLayer = true
let numTouch = recognizer.numberOfTouches
for i in 0 ..< numTouch {
let location = recognizer.location(ofTouch: i, in: view)
let convertedTouch = previewLayer.convert(location, from: previewLayer.superlayer)
if !previewLayer.contains(convertedTouch) {
allTouchesOnPreviewLayer = false
break
}
}
if allTouchesOnPreviewLayer {
zoom(recognizer.scale)
}
}
func cameraDevice(_ position: AVCaptureDevice.Position) -> AVCaptureDevice? {
var deviceTypes = [AVCaptureDevice.DeviceType]()
deviceTypes.append(contentsOf: [.builtInDualCamera, .builtInTelephotoCamera, .builtInWideAngleCamera, .builtInTrueDepthCamera])
if #available(iOS 13.0, *) {
deviceTypes.append(contentsOf: [.builtInTripleCamera, .builtInDualWideCamera, .builtInUltraWideCamera])
}
let availableCameraDevices = AVCaptureDevice.DiscoverySession(deviceTypes: deviceTypes, mediaType: .video, position: position).devices
guard availableCameraDevices.isEmpty == false else {
debugPrint("ERROR: No camera devices found!!!")
return nil
}
for device in availableCameraDevices {
if device.position == position {
return device
}
}
guard let defaultDevice = AVCaptureDevice.default(for: AVMediaType.video) else {
debugPrint("ERROR: Can't initialize default back camera!!!")
return nil
}
return defaultDevice
}