4ee52d6211
* feat: Add `onStarted` and `onStopped` events * Implement `onStart` for Android * Update CameraSession.kt * Update CameraSessionDelegate.swift
357 lines
10 KiB
Swift
357 lines
10 KiB
Swift
//
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// CameraView.swift
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// mrousavy
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//
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// Created by Marc Rousavy on 09.11.20.
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// Copyright © 2020 mrousavy. All rights reserved.
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//
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import AVFoundation
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import Foundation
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import UIKit
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// TODOs for the CameraView which are currently too hard to implement either because of AVFoundation's limitations, or my brain capacity
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//
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// CameraView+RecordVideo
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// TODO: Better startRecording()/stopRecording() (promise + callback, wait for TurboModules/JSI)
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//
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// CameraView+TakePhoto
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// TODO: Photo HDR
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// MARK: - CameraView
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public final class CameraView: UIView, CameraSessionDelegate {
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// pragma MARK: React Properties
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// props that require reconfiguring
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@objc var cameraId: NSString?
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@objc var enableDepthData = false
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@objc var enableHighQualityPhotos = false
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@objc var enablePortraitEffectsMatteDelivery = false
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@objc var enableBufferCompression = false
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// use cases
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@objc var photo = false
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@objc var video = false
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@objc var audio = false
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@objc var enableFrameProcessor = false
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@objc var codeScannerOptions: NSDictionary?
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@objc var pixelFormat: NSString?
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// props that require format reconfiguring
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@objc var format: NSDictionary?
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@objc var fps: NSNumber?
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@objc var videoHdr = false
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@objc var photoHdr = false
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@objc var lowLightBoost = false
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@objc var orientation: NSString?
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// other props
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@objc var isActive = false
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@objc var torch = "off"
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@objc var zoom: NSNumber = 1.0 // in "factor"
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@objc var exposure: NSNumber = 1.0
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@objc var enableFpsGraph = false
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@objc var videoStabilizationMode: NSString?
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@objc var resizeMode: NSString = "cover" {
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didSet {
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let parsed = try? ResizeMode(jsValue: resizeMode as String)
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previewView.resizeMode = parsed ?? .cover
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}
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}
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// events
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@objc var onInitialized: RCTDirectEventBlock?
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@objc var onError: RCTDirectEventBlock?
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@objc var onStarted: RCTDirectEventBlock?
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@objc var onStopped: RCTDirectEventBlock?
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@objc var onViewReady: RCTDirectEventBlock?
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@objc var onCodeScanned: RCTDirectEventBlock?
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// zoom
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@objc var enableZoomGesture = false {
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didSet {
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if enableZoomGesture {
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addPinchGestureRecognizer()
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} else {
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removePinchGestureRecognizer()
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}
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}
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}
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// pragma MARK: Internal Properties
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var cameraSession: CameraSession
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var isMounted = false
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var isReady = false
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#if VISION_CAMERA_ENABLE_FRAME_PROCESSORS
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@objc public var frameProcessor: FrameProcessor?
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#endif
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// CameraView+Zoom
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var pinchGestureRecognizer: UIPinchGestureRecognizer?
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var pinchScaleOffset: CGFloat = 1.0
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var previewView: PreviewView
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#if DEBUG
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var fpsGraph: RCTFPSGraph?
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#endif
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// pragma MARK: Setup
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override public init(frame: CGRect) {
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// Create CameraSession
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cameraSession = CameraSession()
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previewView = cameraSession.createPreviewView(frame: frame)
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super.init(frame: frame)
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cameraSession.delegate = self
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addSubview(previewView)
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}
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@available(*, unavailable)
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required init?(coder _: NSCoder) {
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fatalError("init(coder:) is not implemented.")
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}
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override public func willMove(toSuperview newSuperview: UIView?) {
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super.willMove(toSuperview: newSuperview)
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if newSuperview != nil {
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if !isMounted {
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isMounted = true
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onViewReady?(nil)
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}
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}
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}
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override public func layoutSubviews() {
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previewView.frame = frame
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previewView.bounds = bounds
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}
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func getPixelFormat() -> PixelFormat {
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// TODO: Use ObjC RCT enum parser for this
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if let pixelFormat = pixelFormat as? String {
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do {
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return try PixelFormat(jsValue: pixelFormat)
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} catch {
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if let error = error as? CameraError {
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onError(error)
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} else {
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onError(.unknown(message: error.localizedDescription, cause: error as NSError))
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}
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}
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}
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return .native
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}
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func getTorch() -> Torch {
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// TODO: Use ObjC RCT enum parser for this
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if let torch = try? Torch(jsValue: torch) {
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return torch
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}
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return .off
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}
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// pragma MARK: Props updating
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override public final func didSetProps(_ changedProps: [String]!) {
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ReactLogger.log(level: .info, message: "Updating \(changedProps.count) props: [\(changedProps.joined(separator: ", "))]")
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cameraSession.configure { config in
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// Input Camera Device
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config.cameraId = cameraId as? String
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// Photo
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if photo {
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config.photo = .enabled(config: CameraConfiguration.Photo(enableHighQualityPhotos: enableHighQualityPhotos,
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enableDepthData: enableDepthData,
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enablePortraitEffectsMatte: enablePortraitEffectsMatteDelivery))
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} else {
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config.photo = .disabled
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}
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// Video/Frame Processor
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if video || enableFrameProcessor {
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config.video = .enabled(config: CameraConfiguration.Video(pixelFormat: getPixelFormat(),
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enableBufferCompression: enableBufferCompression,
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enableHdr: videoHdr,
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enableFrameProcessor: enableFrameProcessor))
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} else {
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config.video = .disabled
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}
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// Audio
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if audio {
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config.audio = .enabled(config: CameraConfiguration.Audio())
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} else {
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config.audio = .disabled
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}
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// Code Scanner
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if let codeScannerOptions {
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let options = try CodeScannerOptions(fromJsValue: codeScannerOptions)
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config.codeScanner = .enabled(config: CameraConfiguration.CodeScanner(options: options))
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} else {
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config.codeScanner = .disabled
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}
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// Video Stabilization
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if let jsVideoStabilizationMode = videoStabilizationMode as? String {
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let videoStabilizationMode = try VideoStabilizationMode(jsValue: jsVideoStabilizationMode)
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config.videoStabilizationMode = videoStabilizationMode
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} else {
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config.videoStabilizationMode = .off
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}
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// Orientation
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if let jsOrientation = orientation as? String {
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let orientation = try Orientation(jsValue: jsOrientation)
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config.orientation = orientation
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} else {
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config.orientation = .portrait
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}
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// Format
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if let jsFormat = format {
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let format = try CameraDeviceFormat(jsValue: jsFormat)
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config.format = format
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} else {
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config.format = nil
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}
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// Side-Props
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config.fps = fps?.int32Value
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config.enableLowLightBoost = lowLightBoost
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config.torch = try Torch(jsValue: torch)
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// Zoom
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config.zoom = zoom.doubleValue
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// Exposure
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config.exposure = exposure.floatValue
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// isActive
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config.isActive = isActive
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}
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// Store `zoom` offset for native pinch-gesture
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if changedProps.contains("zoom") {
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pinchScaleOffset = zoom.doubleValue
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}
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// Set up Debug FPS Graph
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if changedProps.contains("enableFpsGraph") {
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DispatchQueue.main.async {
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self.setupFpsGraph()
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}
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}
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}
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func setupFpsGraph() {
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#if DEBUG
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if enableFpsGraph {
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if fpsGraph != nil { return }
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fpsGraph = RCTFPSGraph(frame: CGRect(x: 10, y: 54, width: 75, height: 45), color: .red)
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fpsGraph!.layer.zPosition = 9999.0
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addSubview(fpsGraph!)
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} else {
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fpsGraph?.removeFromSuperview()
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fpsGraph = nil
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}
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#endif
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}
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// pragma MARK: Event Invokers
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func onError(_ error: CameraError) {
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ReactLogger.log(level: .error, message: "Invoking onError(): \(error.message)")
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guard let onError = onError else {
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return
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}
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var causeDictionary: [String: Any]?
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if case let .unknown(_, cause) = error,
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let cause = cause {
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causeDictionary = [
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"code": cause.code,
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"domain": cause.domain,
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"message": cause.description,
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"details": cause.userInfo,
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]
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}
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onError([
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"code": error.code,
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"message": error.message,
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"cause": causeDictionary ?? NSNull(),
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])
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}
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func onSessionInitialized() {
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ReactLogger.log(level: .info, message: "Camera initialized!")
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guard let onInitialized = onInitialized else {
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return
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}
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onInitialized([:])
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}
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func onCameraStarted() {
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ReactLogger.log(level: .info, message: "Camera started!")
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guard let onStarted = onStarted else {
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return
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}
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onStarted([:])
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}
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func onCameraStopped() {
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ReactLogger.log(level: .info, message: "Camera stopped!")
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guard let onStopped = onStopped else {
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return
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}
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onStopped([:])
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}
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func onFrame(sampleBuffer: CMSampleBuffer) {
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#if VISION_CAMERA_ENABLE_FRAME_PROCESSORS
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if let frameProcessor = frameProcessor {
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// Call Frame Processor
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let frame = Frame(buffer: sampleBuffer, orientation: bufferOrientation)
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frameProcessor.call(frame)
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}
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#endif
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#if DEBUG
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if let fpsGraph {
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DispatchQueue.main.async {
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fpsGraph.onTick(CACurrentMediaTime())
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}
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}
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#endif
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}
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func onCodeScanned(codes: [CameraSession.Code], scannerFrame: CameraSession.CodeScannerFrame) {
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guard let onCodeScanned = onCodeScanned else {
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return
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}
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onCodeScanned([
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"codes": codes.map { $0.toJSValue() },
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"frame": scannerFrame.toJSValue(),
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])
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}
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/**
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Gets the orientation of the CameraView's images (CMSampleBuffers).
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*/
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private var bufferOrientation: UIImage.Orientation {
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guard let cameraPosition = cameraSession.videoDeviceInput?.device.position else {
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return .up
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}
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let orientation = cameraSession.configuration?.orientation ?? .portrait
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// TODO: I think this is wrong.
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switch orientation {
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case .portrait:
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return cameraPosition == .front ? .leftMirrored : .right
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case .landscapeLeft:
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return cameraPosition == .front ? .downMirrored : .up
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case .portraitUpsideDown:
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return cameraPosition == .front ? .rightMirrored : .left
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case .landscapeRight:
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return cameraPosition == .front ? .upMirrored : .down
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}
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}
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}
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