70 lines
2.7 KiB
Swift
70 lines
2.7 KiB
Swift
import Foundation
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import AVFoundation
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@objc
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protocol CameraCaptureDelegate : AnyObject {
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func captureVideoOutput(sampleBuffer: CMSampleBuffer)
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}
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final class CameraManager : NSObject {
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private let captureSession = AVCaptureSession()
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private let videoDataOutput = AVCaptureVideoDataOutput()
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private let audioDataOutput = AVCaptureAudioDataOutput()
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private let dataOutputQueue = DispatchQueue(label: "CameraManager.dataOutputQueue", qos: .userInitiated, attributes: [], autoreleaseFrequency: .workItem)
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private var isCapturing = false
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weak var delegate: CameraCaptureDelegate?
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private lazy var videoCaptureDevice: AVCaptureDevice? = {
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return AVCaptureDevice.default(.builtInWideAngleCamera, for: .video, position: .front)
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}()
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static let shared = CameraManager()
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private override init() { }
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func prepare() {
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if let videoCaptureDevice = videoCaptureDevice,
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let videoInput = try? AVCaptureDeviceInput(device: videoCaptureDevice), captureSession.canAddInput(videoInput) {
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captureSession.addInput(videoInput)
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}
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if captureSession.canAddOutput(videoDataOutput) {
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captureSession.addOutput(videoDataOutput)
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videoDataOutput.videoSettings = [kCVPixelBufferPixelFormatTypeKey as String: Int(kCVPixelFormatType_32BGRA)]
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videoDataOutput.setSampleBufferDelegate(self, queue: dataOutputQueue)
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videoDataOutput.connection(with: .video)?.videoOrientation = .portrait
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videoDataOutput.connection(with: .video)?.automaticallyAdjustsVideoMirroring = false
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videoDataOutput.connection(with: .video)?.isVideoMirrored = true
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} else {
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SNLog("Couldn't add video data output to capture session.")
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captureSession.commitConfiguration()
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}
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}
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func start() {
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guard !isCapturing else { return }
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isCapturing = true
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#if arch(arm64)
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captureSession.startRunning()
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#endif
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}
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func stop() {
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guard isCapturing else { return }
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isCapturing = false
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#if arch(arm64)
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captureSession.stopRunning()
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#endif
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}
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}
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extension CameraManager : AVCaptureVideoDataOutputSampleBufferDelegate, AVCaptureAudioDataOutputSampleBufferDelegate {
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func captureOutput(_ output: AVCaptureOutput, didOutput sampleBuffer: CMSampleBuffer, from connection: AVCaptureConnection) {
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guard connection == videoDataOutput.connection(with: .video) else { return }
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delegate?.captureVideoOutput(sampleBuffer: sampleBuffer)
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}
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func captureOutput(_ output: AVCaptureOutput, didDrop sampleBuffer: CMSampleBuffer, from connection: AVCaptureConnection) { }
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}
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