├── images ├── 1.png ├── 2.png ├── 3.png ├── 4.png ├── 5.png └── 6.png ├── Simple Recorder ├── Assets.xcassets │ ├── Contents.json │ ├── AccentColor.colorset │ │ └── Contents.json │ └── AppIcon.appiconset │ │ └── Contents.json ├── Preview Content │ └── Preview Assets.xcassets │ │ └── Contents.json ├── RecordingState.swift ├── SimpleRecorder.swift ├── RecorderView.swift └── AudioManager.swift ├── Simple Recorder.xcodeproj ├── project.xcworkspace │ ├── contents.xcworkspacedata │ └── xcshareddata │ │ └── IDEWorkspaceChecks.plist ├── xcuserdata │ └── xiaoquan.xcuserdatad │ │ ├── xcschemes │ │ └── xcschememanagement.plist │ │ └── xcdebugger │ │ └── Breakpoints_v2.xcbkptlist └── project.pbxproj └── README.md /images/1.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/all-laugh/AudioRecorder-TextToSpeech-SwiftUI/HEAD/images/1.png -------------------------------------------------------------------------------- /images/2.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/all-laugh/AudioRecorder-TextToSpeech-SwiftUI/HEAD/images/2.png -------------------------------------------------------------------------------- /images/3.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/all-laugh/AudioRecorder-TextToSpeech-SwiftUI/HEAD/images/3.png -------------------------------------------------------------------------------- /images/4.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/all-laugh/AudioRecorder-TextToSpeech-SwiftUI/HEAD/images/4.png -------------------------------------------------------------------------------- /images/5.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/all-laugh/AudioRecorder-TextToSpeech-SwiftUI/HEAD/images/5.png -------------------------------------------------------------------------------- /images/6.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/all-laugh/AudioRecorder-TextToSpeech-SwiftUI/HEAD/images/6.png -------------------------------------------------------------------------------- /Simple Recorder/Assets.xcassets/Contents.json: -------------------------------------------------------------------------------- 1 | { 2 | "info" : { 3 | "author" : "xcode", 4 | "version" : 1 5 | } 6 | } 7 | -------------------------------------------------------------------------------- /Simple Recorder/Preview Content/Preview Assets.xcassets/Contents.json: -------------------------------------------------------------------------------- 1 | { 2 | "info" : { 3 | "author" : "xcode", 4 | "version" : 1 5 | } 6 | } 7 | -------------------------------------------------------------------------------- /Simple Recorder/Assets.xcassets/AccentColor.colorset/Contents.json: -------------------------------------------------------------------------------- 1 | { 2 | "colors" : [ 3 | { 4 | "idiom" : "universal" 5 | } 6 | ], 7 | "info" : { 8 | "author" : "xcode", 9 | "version" : 1 10 | } 11 | } 12 | -------------------------------------------------------------------------------- /Simple Recorder.xcodeproj/project.xcworkspace/contents.xcworkspacedata: -------------------------------------------------------------------------------- 1 | 2 | 4 | 6 | 7 | 8 | -------------------------------------------------------------------------------- /Simple Recorder.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | IDEDidComputeMac32BitWarning 6 | 7 | 8 | 9 | -------------------------------------------------------------------------------- /Simple Recorder/RecordingState.swift: -------------------------------------------------------------------------------- 1 | // 2 | // RecordingState.swift 3 | // SimpleRecorder 4 | // 5 | // Created by Xiao Quan on 1/18/22. 6 | // 7 | 8 | import Foundation 9 | 10 | enum RecordingState: Int, CustomStringConvertible { 11 | case recording, 12 | paused, 13 | stopped, 14 | playing, 15 | playingSpeech 16 | 17 | var stateName: String { 18 | let states = ["Audio: Recording", "Audio: Paused", "Audio: Stopped", "Audio: Playing", "Audio: Playing Speech"] 19 | 20 | return states[self.rawValue] 21 | } 22 | 23 | var description: String { 24 | return stateName 25 | } 26 | 27 | } 28 | -------------------------------------------------------------------------------- /Simple Recorder.xcodeproj/xcuserdata/xiaoquan.xcuserdatad/xcschemes/xcschememanagement.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | SchemeUserState 6 | 7 | LearningAVFoundation.xcscheme_^#shared#^_ 8 | 9 | orderHint 10 | 0 11 | 12 | Simple Recorder.xcscheme_^#shared#^_ 13 | 14 | orderHint 15 | 0 16 | 17 | 18 | 19 | 20 | -------------------------------------------------------------------------------- /Simple Recorder/SimpleRecorder.swift: -------------------------------------------------------------------------------- 1 | // 2 | // SimpleRecorderApp.swift 3 | // SimpleRecorder 4 | // 5 | // Created by Xiao Quan on 1/18/22. 6 | // 7 | 8 | import SwiftUI 9 | import AVFoundation 10 | 11 | 12 | class AppDelegate: NSObject, UIApplicationDelegate { 13 | func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool { 14 | 15 | let session = AVAudioSession.sharedInstance() 16 | do { 17 | try session.setCategory(.playAndRecord, options: [.allowBluetooth]) 18 | try session.setActive(true) 19 | } catch { 20 | print("Error setting AVAudioSession Category", error.localizedDescription) 21 | } 22 | 23 | print("Simulator Directory: \(NSHomeDirectory())") 24 | 25 | return true 26 | } 27 | } 28 | 29 | @main 30 | struct LearningAVFoundationApp: App { 31 | @UIApplicationDelegateAdaptor(AppDelegate.self) var appDelegate 32 | 33 | var body: some Scene { 34 | WindowGroup { 35 | RecorderView() 36 | } 37 | } 38 | } 39 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Simple Audio Recorder + Speech Synthesizer 2 | 3 | A simple audio recorder + speech synthesizer that utilizes essential functionalities of AVFoundation, and a little bit of AVAudioEngine for real-time audio effect processing. 4 | 5 | Hacked in a day while learning more about AVFoundation. 6 | 7 | ### Can: 8 | 9 | - Record 2 channel audio at 44100, linear PCM 10 | - Play back what just recorded immediately 11 | - Toggle a text to speech player with an Australian accent 12 | - Change the pitch and speed of the speech synthesizer in settings 13 | - Change the pitch and reverb dry/wet of normal recordings in real-time during playback 14 | - View and play recorded file in a separate tab 15 | - Delete recorded files 16 | - Handle audio route changes or app state changes accordingly using AVAudioSession and notification observers 17 | 18 | interface 19 | 20 | 21 | 22 | recording 23 | 24 | 25 | 26 | recorded files, tap to play 27 | 28 | 29 | 30 | speech synthesizer 31 | 32 | 33 | 34 | settings page 35 | 36 | 37 | 38 | ### Cannot: 39 | 40 | - alter speech synth speed/pitch in real-time 41 | 42 | ### Future work (probably in a another project): 43 | 44 | - refactor the heck out 45 | - nice to support recording in different formats/samplerates 46 | -------------------------------------------------------------------------------- /Simple Recorder/Assets.xcassets/AppIcon.appiconset/Contents.json: -------------------------------------------------------------------------------- 1 | { 2 | "images" : [ 3 | { 4 | "idiom" : "iphone", 5 | "scale" : "2x", 6 | "size" : "20x20" 7 | }, 8 | { 9 | "idiom" : "iphone", 10 | "scale" : "3x", 11 | "size" : "20x20" 12 | }, 13 | { 14 | "idiom" : "iphone", 15 | "scale" : "2x", 16 | "size" : "29x29" 17 | }, 18 | { 19 | "idiom" : "iphone", 20 | "scale" : "3x", 21 | "size" : "29x29" 22 | }, 23 | { 24 | "idiom" : "iphone", 25 | "scale" : "2x", 26 | "size" : "40x40" 27 | }, 28 | { 29 | "idiom" : "iphone", 30 | "scale" : "3x", 31 | "size" : "40x40" 32 | }, 33 | { 34 | "idiom" : "iphone", 35 | "scale" : "2x", 36 | "size" : "60x60" 37 | }, 38 | { 39 | "idiom" : "iphone", 40 | "scale" : "3x", 41 | "size" : "60x60" 42 | }, 43 | { 44 | "idiom" : "ipad", 45 | "scale" : "1x", 46 | "size" : "20x20" 47 | }, 48 | { 49 | "idiom" : "ipad", 50 | "scale" : "2x", 51 | "size" : "20x20" 52 | }, 53 | { 54 | "idiom" : "ipad", 55 | "scale" : "1x", 56 | "size" : "29x29" 57 | }, 58 | { 59 | "idiom" : "ipad", 60 | "scale" : "2x", 61 | "size" : "29x29" 62 | }, 63 | { 64 | "idiom" : "ipad", 65 | "scale" : "1x", 66 | "size" : "40x40" 67 | }, 68 | { 69 | "idiom" : "ipad", 70 | "scale" : "2x", 71 | "size" : "40x40" 72 | }, 73 | { 74 | "idiom" : "ipad", 75 | "scale" : "1x", 76 | "size" : "76x76" 77 | }, 78 | { 79 | "idiom" : "ipad", 80 | "scale" : "2x", 81 | "size" : "76x76" 82 | }, 83 | { 84 | "idiom" : "ipad", 85 | "scale" : "2x", 86 | "size" : "83.5x83.5" 87 | }, 88 | { 89 | "idiom" : "ios-marketing", 90 | "scale" : "1x", 91 | "size" : "1024x1024" 92 | } 93 | ], 94 | "info" : { 95 | "author" : "xcode", 96 | "version" : 1 97 | } 98 | } 99 | -------------------------------------------------------------------------------- /Simple Recorder.xcodeproj/xcuserdata/xiaoquan.xcuserdatad/xcdebugger/Breakpoints_v2.xcbkptlist: -------------------------------------------------------------------------------- 1 | 2 | 6 | 7 | 9 | 21 | 22 | 23 | 25 | 37 | 38 | 39 | 41 | 53 | 54 | 55 | 56 | 57 | -------------------------------------------------------------------------------- /Simple Recorder/RecorderView.swift: -------------------------------------------------------------------------------- 1 | // 2 | // ContentView.swift 3 | // SimpleRecorder 4 | // 5 | // Created by Xiao Quan on 1/18/22. 6 | // 7 | 8 | import SwiftUI 9 | import AVFAudio 10 | 11 | struct RecorderView: View { 12 | @ObservedObject var audioManager = AudioManager() 13 | @AppStorage("textToSpeak") var textToSpeak: String = "Hello there" 14 | @State var requestPermission: Bool = false 15 | @State var permissionGranted: Bool = false 16 | 17 | var body: some View { 18 | TabView { 19 | // MARK: - Play Tab 20 | VStack { 21 | Spacer() 22 | 23 | if !audioManager.playFromSpeechSynthesizer { 24 | // Record 25 | Button { 26 | if audioManager.recordingStatus == .stopped { 27 | if permissionGranted { 28 | audioManager.record() 29 | } else { 30 | requestAudioPermission() 31 | } 32 | } else { 33 | audioManager.stop() 34 | } 35 | } label: { 36 | Image(systemName: audioManager.recordingStatus == .recording ? 37 | "stop.circle.fill" : "record.circle.fill") 38 | .resizable() 39 | .aspectRatio(contentMode: .fit) 40 | .frame(width: 100, height: 100) 41 | .padding() 42 | } 43 | } else { 44 | if #available(iOS 15.0, *) { 45 | TextEditor(text: $textToSpeak) 46 | .frame(maxHeight: 250) 47 | .cornerRadius(10) 48 | .shadow(radius: 10) 49 | .padding() 50 | } else { 51 | // Fallback on earlier versions 52 | } 53 | } 54 | 55 | // Play 56 | if audioManager.previousRecordingUrl != nil { 57 | Button { 58 | if audioManager.recordingStatus == .stopped { 59 | print("current status: stopped. Will play recorded audio") 60 | audioManager.play() 61 | } else if audioManager.recordingStatus == .playing { 62 | print("current status: playing. Will stop playing") 63 | audioManager.stopPlayback() 64 | } else { // recording 65 | print("current status: recoding. Will stop recording and play") 66 | audioManager.stop() 67 | audioManager.play() 68 | } 69 | } label: { 70 | Image(systemName: audioManager.recordingStatus == .playing || 71 | audioManager.recordingStatus == .playingSpeech ? 72 | "stop.circle": 73 | "play.circle") 74 | .resizable() 75 | .aspectRatio(contentMode: .fit) 76 | .frame(width: 100, height: 100) 77 | .padding() 78 | } 79 | } 80 | 81 | Spacer() 82 | 83 | if audioManager.recordingStatus == .recording || 84 | audioManager.recordingStatus == .playing { 85 | Text(audioManager.time) 86 | .font(.custom("courier", size: 18)) 87 | .bold() 88 | } 89 | 90 | Toggle("Speech Synthesizer", isOn: $audioManager.playFromSpeechSynthesizer) 91 | .padding(80) 92 | } 93 | .alert(isPresented: $requestPermission) { 94 | Alert(title: Text("Permission Denied"), 95 | message: Text("Got to settings to enable microphone access"), 96 | dismissButton: .default(Text("Ok"))) 97 | } 98 | .tabItem { 99 | VStack { 100 | Image(systemName: "play") 101 | Text("Play") 102 | } 103 | } 104 | .tag(0) 105 | 106 | // MARK: - Files Tab 107 | List { 108 | ForEach (audioManager.recordedFileNames, id: \.self) { name in 109 | Button { 110 | audioManager.playFile(named: name) 111 | } label: { 112 | Text(name) 113 | } 114 | } 115 | .onDelete { indexSet in 116 | audioManager.deleteFile(at: indexSet) 117 | } 118 | 119 | 120 | } 121 | .tabItem { 122 | VStack { 123 | Image(systemName: "folder") 124 | Text("Recordings") 125 | } 126 | } 127 | .tag(1) 128 | 129 | // MARK: - Settings Tab 130 | List { 131 | Text("Settings") 132 | .font(.headline) 133 | .bold() 134 | 135 | Section(header: Text("Recording Effects")) { 136 | VStack { 137 | Slider(value: $audioManager.pitchShift.pitch, in: -2400...2400, step: 100, onEditingChanged: {_ in }, minimumValueLabel: Text("-24"), maximumValueLabel: Text("24"), label: {}) 138 | 139 | Text("Pitch shift: \(String(format: "%4.0f", audioManager.pitchShift.pitch))") 140 | } 141 | 142 | VStack { 143 | Slider(value: $audioManager.reverb.wetDryMix, in:0...100, step: 1.0, onEditingChanged: {_ in }, minimumValueLabel: Text("0"), maximumValueLabel: Text("100"), label: {}) 144 | Text("Reverb: \(String(format: "%2.0f", audioManager.reverb.wetDryMix))") 145 | } 146 | } 147 | 148 | Section(header: Text("Synthesizer Params")) { 149 | VStack { 150 | Slider(value: $audioManager.speechRate, 151 | in: AVSpeechUtteranceMinimumSpeechRate...AVSpeechUtteranceMaximumSpeechRate, 152 | label: {}) 153 | 154 | Text("Speech Speed: \(String(format: "%1.2f", audioManager.speechRate + 0.5))") 155 | } 156 | 157 | VStack { 158 | Slider(value: $audioManager.speechPitch, 159 | in: 0.5...2.0, 160 | label: {}) 161 | 162 | Text("Speech Pitch: \(String(format: "%1.2f", audioManager.speechPitch))") 163 | } 164 | } 165 | 166 | } 167 | .tabItem { 168 | VStack { 169 | Image(systemName: "gear") 170 | Text("Settings") 171 | } 172 | } 173 | .tag(2) 174 | } 175 | .accentColor(.red) 176 | .foregroundColor(.red) 177 | .onAppear { 178 | // audioManager.setupRecorder() 179 | audioManager.prepareEngine() 180 | } 181 | } 182 | 183 | private func requestAudioPermission() { 184 | let session = AVAudioSession.sharedInstance() 185 | session.requestRecordPermission { granted in 186 | self.permissionGranted = granted 187 | if granted { 188 | audioManager.record() 189 | } else { 190 | requestPermission = true 191 | } 192 | } 193 | } 194 | } 195 | 196 | struct ContentView_Previews: PreviewProvider { 197 | static var previews: some View { 198 | RecorderView() 199 | } 200 | } 201 | -------------------------------------------------------------------------------- /Simple Recorder/AudioManager.swift: -------------------------------------------------------------------------------- 1 | // 2 | // AudioRecorder.swift 3 | // LearningAVFoundation 4 | // 5 | // Created by Xiao Quan on 1/18/22. 6 | // 7 | 8 | import Foundation 9 | import AVFoundation 10 | import SwiftUI 11 | 12 | class AudioManager: NSObject, ObservableObject { 13 | 14 | var audioRecorder: AVAudioRecorder? 15 | var audioPlayer: AVAudioPlayer? 16 | var updateTimer: CADisplayLink? 17 | var audioEngine = AVAudioEngine() 18 | var audioEnginePlayer = AVAudioPlayerNode() 19 | @Published var pitchShift = AVAudioUnitTimePitch() 20 | @Published var reverb = AVAudioUnitReverb() 21 | var recordTime: TimeInterval = 0.0 22 | var playbackTime: TimeInterval = 0.0 23 | var fileToPlay: AVAudioFile? 24 | 25 | @Published var playFromSpeechSynthesizer = false 26 | var speechSynthesizer = AVSpeechSynthesizer() 27 | @AppStorage("textToSpeak") var textToSpeak: String = "Hello there" 28 | @Published var speechPitch: Float = 1.0 29 | @Published var speechRate: Float = AVSpeechUtteranceDefaultSpeechRate 30 | 31 | @Published var recordingStatus: RecordingState = .stopped 32 | @Published var time = "00:00:00" 33 | 34 | var previousRecordingUrl: URL? 35 | 36 | override init() { 37 | super.init() 38 | let notificationCenter = NotificationCenter.default 39 | notificationCenter.addObserver(self, selector: #selector(handleRouteChange), name: AVAudioSession.routeChangeNotification, object: nil) 40 | notificationCenter.addObserver(self, selector: #selector(handleInteruption), name: AVAudioSession.interruptionNotification, object: nil) 41 | notificationCenter.addObserver(self, selector: #selector(handleAEChange), name: .AVAudioEngineConfigurationChange, object: nil) 42 | speechSynthesizer.delegate = self 43 | 44 | loadFileNames() 45 | } 46 | 47 | deinit { 48 | NotificationCenter.default.removeObserver(self) 49 | } 50 | 51 | @objc func handleAEChange(notification: Notification) { 52 | if let info = notification.userInfo { 53 | print(info) 54 | } 55 | } 56 | 57 | @objc func handleRouteChange(notification: Notification) { 58 | if let info = notification.userInfo, 59 | let rawValue = info[AVAudioSessionRouteChangeReasonKey] as? UInt { 60 | let reason = AVAudioSession.RouteChangeReason(rawValue: rawValue) 61 | if reason == .oldDeviceUnavailable { 62 | guard let previousRoute = info[AVAudioSessionRouteChangePreviousRouteKey] as? AVAudioSessionRouteDescription, 63 | let previousOutput = previousRoute.outputs.first else { 64 | return 65 | } 66 | if previousOutput.portType == .headphones { 67 | if recordingStatus == .playing { 68 | stopPlayback() 69 | } else if recordingStatus == .recording { 70 | stop() 71 | } 72 | } 73 | } 74 | } 75 | } 76 | 77 | @objc func handleInteruption(notification: Notification) { 78 | if let info = notification.userInfo, 79 | let rawValue = info[AVAudioSessionInterruptionTypeKey] as? UInt { 80 | let type = AVAudioSession.InterruptionType(rawValue: rawValue) 81 | if type == .began { 82 | if recordingStatus == .playing { 83 | stopPlayback() 84 | } else if recordingStatus == .recording { 85 | stop() 86 | } 87 | } else { 88 | if let rawValue = info[AVAudioSessionInterruptionOptionKey] as? UInt { 89 | let options = AVAudioSession.InterruptionOptions(rawValue: rawValue) 90 | if options == .shouldResume { 91 | // restart audio or restart recording 92 | } 93 | } 94 | } 95 | } 96 | } 97 | 98 | func prepareEngine() { 99 | let format = audioEngine.outputNode.inputFormat(forBus: 0) // Something is fishy 100 | print(format.sampleRate) 101 | print(AVAudioSession.sharedInstance().sampleRate) 102 | audioEngine.attach(audioEnginePlayer) 103 | audioEngine.attach(pitchShift) 104 | audioEngine.attach(reverb) 105 | audioEngine.connect(audioEnginePlayer, to: pitchShift, format: format) 106 | audioEngine.connect(pitchShift, to: reverb, format: format) 107 | audioEngine.connect(reverb, to: audioEngine.outputNode, format: format) 108 | 109 | reverb.loadFactoryPreset(.cathedral) 110 | pitchShift.pitch = 0.0 111 | reverb.wetDryMix = 50 112 | 113 | audioEngine.prepare() 114 | print("AudioEngine is prepare to start") 115 | } 116 | 117 | func startEngine() { 118 | do { 119 | try audioEngine.start() 120 | print("Audio Engine prepared and running: ", audioEngine.isRunning) 121 | } catch { 122 | print("AudioEngine start failed: ", error.localizedDescription) 123 | } 124 | } 125 | 126 | func setupRecorder() { 127 | let settings: [String: Any] = [ 128 | AVFormatIDKey : Int(kAudioFormatLinearPCM), 129 | AVSampleRateKey : 44100.0, 130 | AVNumberOfChannelsKey : 2, 131 | AVEncoderAudioQualityKey : AVAudioQuality.high.rawValue 132 | ] 133 | do { 134 | try audioRecorder = AVAudioRecorder(url: generateFileUrl(), settings: settings) 135 | audioRecorder?.delegate = self 136 | } catch { 137 | print("Error creating audio recorder with format: \(error.localizedDescription)") 138 | } 139 | } 140 | 141 | func record() { 142 | setupRecorder() 143 | 144 | if let recorder = audioRecorder { 145 | recorder.record() 146 | } 147 | recordingStatus = .recording 148 | startUpdateLoop() 149 | print("record(): ", audioEngine.isRunning) 150 | } 151 | 152 | func stop() { 153 | if let recorder = audioRecorder { 154 | recorder.stop() 155 | 156 | } 157 | recordingStatus = .stopped 158 | stopLoop() 159 | print("stop(): ", audioEngine.isRunning) 160 | } 161 | 162 | func play() { 163 | if playFromSpeechSynthesizer { 164 | let utterance = AVSpeechUtterance(string: textToSpeak) 165 | utterance.voice = AVSpeechSynthesisVoice(language: "en-AU") 166 | utterance.pitchMultiplier = speechPitch 167 | utterance.rate = speechRate 168 | 169 | speechSynthesizer.speak(utterance) 170 | 171 | } else { 172 | print("play() 1. Engine running? ", audioEngine.isRunning) 173 | do { 174 | fileToPlay = try AVAudioFile(forReading: previousRecordingUrl!) 175 | } catch { 176 | print("Error Loading Audio File as AVAudioFile") 177 | } 178 | 179 | guard fileToPlay != nil else { return } 180 | audioEnginePlayer.scheduleFile(fileToPlay!, at: nil, completionHandler: nil) 181 | 182 | do { 183 | try audioPlayer = AVAudioPlayer(contentsOf: previousRecordingUrl!) 184 | audioPlayer?.delegate = self 185 | } catch { 186 | print("Error loading audio file from temp directory") 187 | } 188 | 189 | guard audioPlayer != nil else { return } 190 | if audioPlayer!.duration > 0 { 191 | audioPlayer!.volume = 0 192 | audioPlayer!.prepareToPlay() 193 | } 194 | 195 | startEngine() 196 | print("play() 2. Engine running? ", audioEngine.isRunning) 197 | 198 | guard audioEngine.isRunning else { return } 199 | 200 | audioPlayer!.play() 201 | audioEnginePlayer.play() 202 | recordingStatus = .playing 203 | startUpdateLoop() 204 | } 205 | } 206 | 207 | func stopPlayback() { 208 | audioPlayer?.stop() 209 | audioEnginePlayer.stop() 210 | speechSynthesizer.stopSpeaking(at: .immediate) 211 | recordingStatus = .stopped 212 | stopLoop() 213 | } 214 | 215 | func startUpdateLoop() { 216 | if let updateTimer = updateTimer { 217 | updateTimer.invalidate() 218 | } 219 | updateTimer = CADisplayLink(target: self, selector: #selector(updateLoop)) 220 | updateTimer?.add(to: .current, forMode: .common) 221 | } 222 | 223 | func stopLoop() { 224 | updateTimer?.invalidate() 225 | updateTimer = nil 226 | time = "00:00:00" 227 | } 228 | 229 | @objc func updateLoop() { 230 | if recordingStatus == .recording { 231 | if CFAbsoluteTimeGetCurrent() - recordTime > 0.5 { 232 | // print(audioRecorder?.currentTime) 233 | time = formatTime(UInt(audioRecorder?.currentTime ?? 0)) 234 | recordTime = CFAbsoluteTimeGetCurrent() 235 | } 236 | } else if recordingStatus == .playing { 237 | if CFAbsoluteTimeGetCurrent() - playbackTime > 0.5 { 238 | // print(audioEnginePlayer.lastRenderTime?.audioTimeStamp.mHostTime) 239 | time = formatTime(UInt(audioPlayer?.currentTime ?? 0)) 240 | playbackTime = CFAbsoluteTimeGetCurrent() 241 | } 242 | } 243 | } 244 | 245 | private func formatTime(_ time: UInt) -> String { 246 | let hour = time / 3600 247 | let minute = (time / 60) % 60 248 | let seconds = time % 60 249 | 250 | return String(format: "%02i:%02i:%02i", hour, minute, seconds) 251 | } 252 | 253 | private func generateFileUrl() -> URL { 254 | var url = previousRecordingUrl ?? documentFolderUrl 255 | 256 | do { 257 | let documentDirectory = try FileManager.default.url(for: .documentDirectory, 258 | in: .userDomainMask, 259 | appropriateFor: nil, 260 | create: false) 261 | let formatter = DateFormatter() 262 | formatter.dateFormat = "MM-dd-yyyy_HH-mm-ss" 263 | 264 | let time = formatter.string(from: Date()) 265 | 266 | url = documentDirectory.appendingPathComponent("Recording_" + time + ".caf", isDirectory: false) 267 | 268 | print(url) 269 | } catch { 270 | print(error.localizedDescription) 271 | } 272 | 273 | previousRecordingUrl = url 274 | 275 | return url 276 | } 277 | 278 | var documentFolderUrl: URL { 279 | FileManager.default.urls(for: .documentDirectory, 280 | in: .userDomainMask)[0] 281 | } 282 | 283 | @Published var recordedFileNames: [String] = [] 284 | 285 | private func loadFileNames() { 286 | do { 287 | recordedFileNames = try FileManager.default.contentsOfDirectory(atPath: documentFolderUrl.path).filter { $0.hasSuffix(".caf") } 288 | print("Loaded: ", recordedFileNames) 289 | } catch { 290 | print("Error loading document folder") 291 | } 292 | } 293 | 294 | func playFile(named name: String) { 295 | stop() 296 | let temp = previousRecordingUrl 297 | previousRecordingUrl = documentFolderUrl.appendingPathComponent(name, isDirectory: false) 298 | play() 299 | previousRecordingUrl = temp 300 | } 301 | 302 | func deleteFile(at offsets: IndexSet) { 303 | // var filenames = recordedFileNames 304 | // print("DELETE offsets? -> \(offsets.min())") 305 | // filenames.remove(atOffsets: offsets) 306 | if let indexToDelete = offsets.min() { 307 | let filename = recordedFileNames[indexToDelete] 308 | print("Deleting: ", filename) 309 | let url = documentFolderUrl.appendingPathComponent(filename, isDirectory: false) 310 | // print(url.path) 311 | try? FileManager.default.removeItem(at: url) 312 | } 313 | loadFileNames() 314 | } 315 | 316 | } 317 | 318 | extension AudioManager: AVAudioRecorderDelegate { 319 | func audioRecorderDidFinishRecording(_ recorder: AVAudioRecorder, successfully flag: Bool) { 320 | recordingStatus = .stopped 321 | loadFileNames() 322 | } 323 | } 324 | 325 | extension AudioManager: AVAudioPlayerDelegate { 326 | func audioPlayerDidFinishPlaying(_ player: AVAudioPlayer, successfully flag: Bool) { 327 | print("Audio Player finished playing") 328 | recordingStatus = .stopped 329 | } 330 | 331 | } 332 | 333 | extension AudioManager: AVSpeechSynthesizerDelegate { 334 | func speechSynthesizer(_ synthesizer: AVSpeechSynthesizer, willSpeakRangeOfSpeechString characterRange: NSRange, utterance: AVSpeechUtterance) { 335 | } 336 | 337 | func speechSynthesizer(_ synthesizer: AVSpeechSynthesizer, didStart utterance: AVSpeechUtterance) { 338 | recordingStatus = .playingSpeech 339 | } 340 | 341 | func speechSynthesizer(_ synthesizer: AVSpeechSynthesizer, didFinish utterance: AVSpeechUtterance) { 342 | recordingStatus = .stopped 343 | } 344 | } 345 | -------------------------------------------------------------------------------- /Simple Recorder.xcodeproj/project.pbxproj: -------------------------------------------------------------------------------- 1 | // !$*UTF8*$! 2 | { 3 | archiveVersion = 1; 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