[#89] [#113] [#124] Focus improvements on dual and tripple cameras #127
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Due to different minimum focus distance built in modern cameras it is hard to focus on small barcodes. To improve the fucus it is needed to apply appropriate zoom factor.
Based on sample code from Apple AVCamBarcode: Detecting barcodes and faces
AVCaptureDevice#setRecommendedZoomFactor(forMinimumCodeSize:)method was added to set required zoom factor for desired code size.Additionaly,
AVCaptureDevice.zoomedCameraForQRCode(withMinimumCodeSize:)method was added to choose single wide angle camera and apply zoom factor at once. From my experiments, the focus is a lot better on devices with dual or tripple cameras while scanning codes from short distance.More information can be found in WWDC 2021 session What’s new in camera capture.
Due to usage of Apple sample code I included text of Apple's license.
Fixes #89
Fixes #113
Fixes #124