143 lines
4.2 KiB
Swift
143 lines
4.2 KiB
Swift
//
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// Copyright (c) 2019 Touch Instinct
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the Software), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED AS IS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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//
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import UIKit
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import AVFoundation
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open class BaseReader<Result>: NSObject {
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// MARK: - Public Properties
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public let defaultDevice: AVCaptureDevice? = .default(for: .video)
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public var stopScanningWhenCodeIsFound: Bool = false
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public var didFind: ((Result) -> Void)?
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public var didFailDecoding: (() -> Void)?
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public var isRunning: Bool {
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return session.isRunning
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}
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public var isTorchAvailable: Bool {
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return defaultDevice?.isTorchAvailable ?? false
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}
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public var isTorchEnabled: Bool {
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get {
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return defaultDevice?.torchMode == .on
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}
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set {
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do {
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try defaultDevice?.lockForConfiguration()
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defer {
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defaultDevice?.unlockForConfiguration()
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}
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let newTorchMode: AVCaptureDevice.TorchMode = newValue ? .on : .off
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let isTorchModeSupported = defaultDevice?.isTorchModeSupported(newTorchMode) ?? false
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guard isTorchAvailable, isTorchModeSupported else {
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return
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}
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defaultDevice?.torchMode = newTorchMode
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} catch _ { }
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}
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}
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// MARK: - Checking the Reader Availabilities
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public class func isAvailable() -> Bool {
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guard let captureDevice = AVCaptureDevice.default(for: .video) else {
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return false
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}
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return (try? AVCaptureDeviceInput(device: captureDevice)) != nil
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}
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// MARK: - Internal Properties
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let session = AVCaptureSession()
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let previewLayer: AVCaptureVideoPreviewLayer
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let sessionQueue = DispatchQueue(label: "session_queue")
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lazy var defaultDeviceInput: AVCaptureDeviceInput? = {
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guard let defaultDevice = defaultDevice else {
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return nil
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}
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return try? AVCaptureDeviceInput(device: defaultDevice)
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}()
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var onUpdateRectOfInterest: (() -> Void)?
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// MARK: - Public Initializer
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public init(onUpdateRectOfInterest: (() -> Void)?) {
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self.onUpdateRectOfInterest = onUpdateRectOfInterest
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previewLayer = AVCaptureVideoPreviewLayer(session: session)
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super.init()
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sessionQueue.async {
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self.configureDefaultComponents()
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}
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}
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// MARK: - Deinitializer
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deinit {
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isTorchEnabled = false
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}
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// MARK: - Controlling Reader
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public func startScanning() {
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onUpdateRectOfInterest?()
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sessionQueue.async {
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guard !self.session.isRunning else {
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return
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}
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self.session.startRunning()
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}
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}
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public func stopScanning() {
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sessionQueue.async {
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guard self.session.isRunning else {
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return
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}
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self.session.stopRunning()
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}
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}
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// MARK: - Private Methods
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func configureDefaultComponents() {
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// override
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}
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}
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