29 lines
887 B
Swift
29 lines
887 B
Swift
//
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// AVCaptureDevice+neutralZoom.swift
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// mrousavy
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//
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// Created by Marc Rousavy on 10.01.21.
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// Copyright © 2021 mrousavy. All rights reserved.
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//
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import AVFoundation
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extension AVCaptureDevice {
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/**
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Get the value at which the Zoom factor is neutral.
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For normal wide-angle devices, this is always going to be 1.0, since this is the default scale.
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For devices with an ultra-wide-angle camera, this value is going to be the value where the wide-angle device will switch over.
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*/
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var neutralZoomFactor: CGFloat {
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if #available(iOS 13.0, *) {
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if let indexOfWideAngle = self.constituentDevices.firstIndex(where: { $0.deviceType == .builtInWideAngleCamera }) {
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if let zoomFactor = self.virtualDeviceSwitchOverVideoZoomFactors[safe: indexOfWideAngle - 1] {
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return CGFloat(zoomFactor.doubleValue)
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}
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}
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}
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return 1.0
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}
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}
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