486 lines
14 KiB
Swift
486 lines
14 KiB
Swift
import AVFoundation
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import Flutter
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import UIKit
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private enum RecordingState: String {
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case idle
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case previewing
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case recording
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case stopping
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case error
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}
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private struct RecordingStatus {
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let state: RecordingState
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let outputPath: String?
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let elapsedMillis: Int
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let message: String?
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init(
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state: RecordingState,
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outputPath: String? = nil,
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elapsedMillis: Int = 0,
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message: String? = nil
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) {
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self.state = state
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self.outputPath = outputPath
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self.elapsedMillis = elapsedMillis
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self.message = message
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}
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func toMap() -> [String: Any] {
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var map: [String: Any] = [
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"state": state.rawValue,
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"elapsedMillis": elapsedMillis,
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]
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if let outputPath {
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map["outputPath"] = outputPath
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}
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if let message {
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map["message"] = message
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}
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return map
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}
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}
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private final class RecordingPreviewView: UIView {
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override class var layerClass: AnyClass {
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AVCaptureVideoPreviewLayer.self
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}
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var previewLayer: AVCaptureVideoPreviewLayer {
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layer as! AVCaptureVideoPreviewLayer
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}
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override init(frame: CGRect) {
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super.init(frame: frame)
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previewLayer.videoGravity = .resizeAspectFill
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backgroundColor = .black
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}
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required init?(coder: NSCoder) {
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super.init(coder: coder)
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previewLayer.videoGravity = .resizeAspectFill
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backgroundColor = .black
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}
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}
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private final class RecordingPreviewPlatformView: NSObject, FlutterPlatformView {
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private let previewView: RecordingPreviewView
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init(frame: CGRect) {
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previewView = RecordingPreviewView(frame: frame)
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super.init()
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RecordingCameraController.shared.attach(previewView: previewView)
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}
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func view() -> UIView {
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previewView
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}
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deinit {
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RecordingCameraController.shared.detach(previewView: previewView)
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}
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}
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private final class RecordingPreviewFactory: NSObject, FlutterPlatformViewFactory {
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func create(
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withFrame frame: CGRect,
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viewIdentifier viewId: Int64,
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arguments args: Any?
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) -> FlutterPlatformView {
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RecordingPreviewPlatformView(frame: frame)
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}
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func createArgsCodec() -> FlutterMessageCodec & NSObjectProtocol {
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FlutterStandardMessageCodec.sharedInstance()
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}
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}
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private final class RecordingCameraController: NSObject, AVCaptureFileOutputRecordingDelegate {
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static let shared = RecordingCameraController()
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private let session = AVCaptureSession()
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private let sessionQueue = DispatchQueue(label: "recording.camera.session")
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private let movieOutput = AVCaptureMovieFileOutput()
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private weak var previewView: RecordingPreviewView?
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private var videoInput: AVCaptureDeviceInput?
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private var audioInput: AVCaptureDeviceInput?
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private var configured = false
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private var latestOutputPath: String?
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private var recordingStartedAt: Date?
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private var elapsedTimer: Timer?
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private var pendingStopResult: FlutterResult?
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private(set) var status = RecordingStatus(state: .idle) {
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didSet {
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DispatchQueue.main.async { [weak self] in
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guard let self else { return }
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self.statusListener?(self.currentStatusMap())
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}
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}
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}
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var statusListener: (([String: Any]) -> Void)?
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func attach(previewView: RecordingPreviewView) {
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self.previewView = previewView
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previewView.previewLayer.session = session
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}
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func detach(previewView: RecordingPreviewView) {
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if self.previewView === previewView {
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self.previewView?.previewLayer.session = nil
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self.previewView = nil
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}
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}
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func initializePreview(result: @escaping FlutterResult) {
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guard let previewView else {
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result(FlutterError(code: "NO_PREVIEW", message: "Camera preview is not attached", details: nil))
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return
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}
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previewView.previewLayer.session = session
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sessionQueue.async { [weak self] in
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guard let self else { return }
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do {
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try self.configureSession(withAudio: self.isMicrophoneAuthorized())
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if !self.session.isRunning {
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self.session.startRunning()
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}
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self.updateStatus(RecordingStatus(state: .previewing))
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DispatchQueue.main.async {
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result(self.currentStatusMap())
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}
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} catch {
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self.updateStatus(RecordingStatus(state: .error, message: error.localizedDescription))
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DispatchQueue.main.async {
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result(
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FlutterError(
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code: "PREVIEW_FAILED",
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message: error.localizedDescription,
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details: nil
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)
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)
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}
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}
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}
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}
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func startRecording(withAudio: Bool, result: @escaping FlutterResult) {
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guard previewView != nil else {
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result(FlutterError(code: "NO_PREVIEW", message: "Camera preview is not attached", details: nil))
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return
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}
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sessionQueue.async { [weak self] in
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guard let self else { return }
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do {
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try self.configureSession(withAudio: withAudio && self.isMicrophoneAuthorized())
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if !self.session.isRunning {
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self.session.startRunning()
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}
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guard !self.movieOutput.isRecording else {
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DispatchQueue.main.async {
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result(FlutterError(code: "START_FAILED", message: "Already recording", details: nil))
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}
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return
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}
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let outputURL = try self.createOutputURL()
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self.latestOutputPath = outputURL.path
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self.recordingStartedAt = Date()
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self.updateStatus(RecordingStatus(state: .recording, outputPath: outputURL.path))
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self.movieOutput.startRecording(to: outputURL, recordingDelegate: self)
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DispatchQueue.main.async {
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self.startElapsedTimer()
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result([
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"outputPath": outputURL.path,
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"status": self.currentStatusMap(),
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])
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}
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} catch {
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self.updateStatus(RecordingStatus(state: .error, message: error.localizedDescription))
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DispatchQueue.main.async {
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result(
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FlutterError(
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code: "START_FAILED",
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message: error.localizedDescription,
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details: nil
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)
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)
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}
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}
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}
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}
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func stopRecording(result: @escaping FlutterResult) {
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sessionQueue.async { [weak self] in
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guard let self else { return }
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guard self.movieOutput.isRecording else {
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DispatchQueue.main.async {
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result([
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"outputPath": self.latestOutputPath,
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"status": self.currentStatusMap(),
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])
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}
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return
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}
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self.pendingStopResult = result
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self.updateStatus(RecordingStatus(state: .stopping, outputPath: self.latestOutputPath))
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self.movieOutput.stopRecording()
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}
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}
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func disposePreview(result: @escaping FlutterResult) {
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sessionQueue.async { [weak self] in
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guard let self else { return }
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if self.movieOutput.isRecording {
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self.movieOutput.stopRecording()
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}
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if self.session.isRunning {
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self.session.stopRunning()
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}
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self.session.beginConfiguration()
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for input in self.session.inputs {
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self.session.removeInput(input)
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}
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for output in self.session.outputs {
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self.session.removeOutput(output)
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}
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self.session.commitConfiguration()
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self.videoInput = nil
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self.audioInput = nil
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self.configured = false
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self.updateStatus(RecordingStatus(state: .idle))
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DispatchQueue.main.async {
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self.stopElapsedTimer()
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result(nil)
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}
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}
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}
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func currentStatusMap() -> [String: Any] {
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if status.state == .recording {
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return RecordingStatus(
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state: .recording,
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outputPath: latestOutputPath,
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elapsedMillis: elapsedMillis()
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).toMap()
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}
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return status.toMap()
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}
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func fileOutput(
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_ output: AVCaptureFileOutput,
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didFinishRecordingTo outputFileURL: URL,
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from connections: [AVCaptureConnection],
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error: Error?
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) {
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let stopResult = pendingStopResult
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pendingStopResult = nil
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if let error {
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updateStatus(RecordingStatus(state: .error, outputPath: latestOutputPath, message: error.localizedDescription))
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} else {
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updateStatus(
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RecordingStatus(
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state: .previewing,
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outputPath: latestOutputPath,
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elapsedMillis: elapsedMillis()
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)
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)
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}
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DispatchQueue.main.async { [weak self] in
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guard let self else { return }
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self.stopElapsedTimer()
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stopResult?([
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"outputPath": self.latestOutputPath,
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"status": self.currentStatusMap(),
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])
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}
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}
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private func configureSession(withAudio: Bool) throws {
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if configured {
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try configureAudioInput(enabled: withAudio)
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return
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}
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guard let videoDevice = AVCaptureDevice.default(.builtInWideAngleCamera, for: .video, position: .back)
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?? AVCaptureDevice.default(for: .video)
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else {
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throw NSError(domain: "RecordingCamera", code: 1, userInfo: [NSLocalizedDescriptionKey: "No camera device available"])
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}
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let nextVideoInput = try AVCaptureDeviceInput(device: videoDevice)
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session.beginConfiguration()
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session.sessionPreset = .high
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guard session.canAddInput(nextVideoInput) else {
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session.commitConfiguration()
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throw NSError(domain: "RecordingCamera", code: 2, userInfo: [NSLocalizedDescriptionKey: "Cannot add camera input"])
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}
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session.addInput(nextVideoInput)
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videoInput = nextVideoInput
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guard session.canAddOutput(movieOutput) else {
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session.commitConfiguration()
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throw NSError(domain: "RecordingCamera", code: 3, userInfo: [NSLocalizedDescriptionKey: "Cannot add movie output"])
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}
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session.addOutput(movieOutput)
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session.commitConfiguration()
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configured = true
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try configureAudioInput(enabled: withAudio)
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}
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private func configureAudioInput(enabled: Bool) throws {
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session.beginConfiguration()
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defer { session.commitConfiguration() }
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if let audioInput {
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session.removeInput(audioInput)
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self.audioInput = nil
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}
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guard enabled else { return }
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guard let audioDevice = AVCaptureDevice.default(for: .audio) else { return }
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let nextAudioInput = try AVCaptureDeviceInput(device: audioDevice)
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if session.canAddInput(nextAudioInput) {
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session.addInput(nextAudioInput)
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audioInput = nextAudioInput
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}
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}
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private func isMicrophoneAuthorized() -> Bool {
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AVCaptureDevice.authorizationStatus(for: .audio) == .authorized
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}
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private func createOutputURL() throws -> URL {
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let baseURL = try FileManager.default.url(
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for: .documentDirectory,
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in: .userDomainMask,
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appropriateFor: nil,
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create: true
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)
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let recordingsURL = baseURL.appendingPathComponent("recordings", isDirectory: true)
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try FileManager.default.createDirectory(at: recordingsURL, withIntermediateDirectories: true)
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let formatter = DateFormatter()
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formatter.locale = Locale(identifier: "en_US_POSIX")
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formatter.dateFormat = "yyyyMMdd_HHmmss"
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let filename = "REC_\(formatter.string(from: Date())).mov"
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return recordingsURL.appendingPathComponent(filename)
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}
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private func updateStatus(_ next: RecordingStatus) {
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status = next
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}
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private func elapsedMillis() -> Int {
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guard let recordingStartedAt else { return 0 }
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return max(0, Int(Date().timeIntervalSince(recordingStartedAt) * 1000))
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}
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private func startElapsedTimer() {
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stopElapsedTimer()
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elapsedTimer = Timer.scheduledTimer(withTimeInterval: 1, repeats: true) { [weak self] _ in
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guard let self, self.status.state == .recording else { return }
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self.statusListener?(self.currentStatusMap())
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}
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}
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private func stopElapsedTimer() {
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elapsedTimer?.invalidate()
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elapsedTimer = nil
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}
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}
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final class RecordingPlugin: NSObject, FlutterPlugin, FlutterStreamHandler {
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private let controller = RecordingCameraController.shared
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private var eventSink: FlutterEventSink?
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static func register(with registrar: FlutterPluginRegistrar) {
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let plugin = RecordingPlugin()
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let messenger = registrar.messenger()
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registrar.register(RecordingPreviewFactory(), withId: "recording-camera-preview")
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let methodChannel = FlutterMethodChannel(
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name: "com.example.flutter_template/recording",
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binaryMessenger: messenger
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)
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registrar.addMethodCallDelegate(plugin, channel: methodChannel)
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let eventChannel = FlutterEventChannel(
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name: "com.example.flutter_template/recording_events",
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binaryMessenger: messenger
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)
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eventChannel.setStreamHandler(plugin)
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plugin.controller.statusListener = { [weak plugin] status in
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plugin?.eventSink?(status)
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}
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}
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func handle(_ call: FlutterMethodCall, result: @escaping FlutterResult) {
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switch call.method {
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case "initializePreview":
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controller.initializePreview(result: result)
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case "startRecording":
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let args = call.arguments as? [String: Any]
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let withAudio = args?["withAudio"] as? Bool ?? true
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controller.startRecording(withAudio: withAudio, result: result)
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case "stopRecording":
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controller.stopRecording(result: result)
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case "disposePreview":
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controller.disposePreview(result: result)
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case "getStatus":
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result(controller.currentStatusMap())
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case "hasNotificationPolicyAccess":
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result(true)
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case "openNotificationPolicySettings":
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result(nil)
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case "enableDoNotDisturb":
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result(false)
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case "disableDoNotDisturb":
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result(nil)
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case "isIgnoringBatteryOptimizations":
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result(true)
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case "openBatteryOptimizationSettings":
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result(nil)
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case "setImmersiveMode":
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result(nil)
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case "isForegroundServiceRunning":
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result(false)
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default:
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result(FlutterMethodNotImplemented)
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}
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}
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func onListen(withArguments arguments: Any?, eventSink events: @escaping FlutterEventSink) -> FlutterError? {
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eventSink = events
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events(controller.currentStatusMap())
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return nil
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}
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func onCancel(withArguments arguments: Any?) -> FlutterError? {
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eventSink = nil
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return nil
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}
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}
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