Fix/lower deployment

Demo/TranscriberDemo.xcodeproj/project.pbxproj

@@ -276,7 +276,7 @@
 				"INFOPLIST_KEY_UIStatusBarStyle[sdk=iphonesimulator*]" = UIStatusBarStyleDefault;
 				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPad = "UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
 				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPhone = "UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
-				IPHONEOS_DEPLOYMENT_TARGET = 18.2;
+				IPHONEOS_DEPLOYMENT_TARGET = 15.6;
 				LD_RUNPATH_SEARCH_PATHS = "@executable_path/Frameworks";
 				"LD_RUNPATH_SEARCH_PATHS[sdk=macosx*]" = "@executable_path/../Frameworks";
 				MACOSX_DEPLOYMENT_TARGET = 15.2;
@@ -317,7 +317,7 @@
 				"INFOPLIST_KEY_UIStatusBarStyle[sdk=iphonesimulator*]" = UIStatusBarStyleDefault;
 				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPad = "UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
 				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPhone = "UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
-				IPHONEOS_DEPLOYMENT_TARGET = 18.2;
+				IPHONEOS_DEPLOYMENT_TARGET = 15.6;
 				LD_RUNPATH_SEARCH_PATHS = "@executable_path/Frameworks";
 				"LD_RUNPATH_SEARCH_PATHS[sdk=macosx*]" = "@executable_path/../Frameworks";
 				MACOSX_DEPLOYMENT_TARGET = 15.2;

Demo/TranscriberDemo/ContentView.swift

@@ -5,6 +5,7 @@ import Speech
 import Transcriber
 
 // Example usage in view
+@available(iOS 17, *)
 struct ContentView: View {
     @State private var presenter = DefaultTranscriberPresenter()
 
@@ -69,6 +70,75 @@ struct ContentView: View {
     }
 }
 
+@available(*, deprecated, renamed: "ContentView", message: "Use ContentView instead.")
+struct LegacyContentView: View {
+    @StateObject private var presenter = LegacyTranscriberPresenter()
+
+    var body: some View {
+        VStack {
+            #if os(iOS)
+            // Add input selection picker with proper selection handling
+            Picker("Audio Input", selection: Binding(
+                get: { presenter.selectedInput },
+                set: { if let input = $0 { presenter.selectInput(input) }}
+            )) {
+                ForEach(presenter.availableInputs, id: \.uid) { input in
+                    HStack {
+                        Text(input.portName)
+                        if input.uid == presenter.selectedInput?.uid {
+                            Image(systemName: "checkmark")
+                        }
+                    }
+                    .tag(Optional(input))
+                }
+            }
+            .pickerStyle(.menu)
+            .padding()
+            #endif
+
+            Text(presenter.transcribedText.isEmpty ? "No transcription yet" : presenter.transcribedText)
+                .padding()
+
+            SpeechButton(
+                isRecording: presenter.isRecording,
+                rmsValue: presenter.rmsLevel,
+                isProcessing: false,
+                supportsThinkingState: false,
+                onTap: {
+                    presenter.toggleRecording { finalText in
+                        print("Recording completed with text: \(finalText)")
+                    }
+                }
+            )
+            .disabled(presenter.authStatus != .authorized)
+
+            if let error = presenter.error {
+                Text(error.localizedDescription)
+                    .foregroundColor(.red)
+                    .padding()
+            }
+        }
+        .padding()
+        .task {
+            do {
+                try await presenter.requestAuthorization()
+            } catch {
+                print(error.localizedDescription)
+            }
+        }
+        // Refresh inputs when view appears
+        .onAppear {
+            #if os(iOS)
+            presenter.fetchAvailableInputs()
+            #endif
+        }
+    }
+}
+
 #Preview {
-    ContentView()
+    if #available(iOS 17, *) {
+        ContentView()
+    } else {
+        LegacyContentView()
+    }
 }

Demo/TranscriberDemo/TranscriberDemoApp.swift

@@ -6,7 +6,11 @@ import SwiftUI
 struct TranscriberDemoApp: App {
     var body: some Scene {
         WindowGroup {
-            ContentView()
+            if #available(iOS 17.0, *) {
+                ContentView()
+            } else {
+                LegacyContentView()
+            }
         }
     }
 }

Package.swift

@@ -4,7 +4,7 @@ import PackageDescription
 
 let package = Package(
     name: "Transcriber",
-    platforms: [.macOS(.v14), .iOS(.v17), .tvOS(.v17), .visionOS(.v1)],
+    platforms: [.macOS(.v14), .iOS(.v15), .tvOS(.v15), .visionOS(.v1)],
     products: [.library(name: "Transcriber", targets: ["Transcriber"])],
     targets: [.target(name: "Transcriber")]
 )

Sources/Transcriber/Core/Transcriber.swift

@@ -12,11 +12,6 @@ public actor Transcriber {
     private let audioEngine: AVAudioEngine
     private let logger: DebugLogger
 
-    private lazy var languageModelManager: LanguageModelManager? = {
-        guard let modelInfo = config.languageModelInfo else { return nil }
-        return LanguageModelManager(modelInfo: modelInfo)
-    }()
-
     private var recognitionRequest: SFSpeechAudioBufferRecognitionRequest?
     private var recognitionTask: SFSpeechRecognitionTask?
 
@@ -41,15 +36,18 @@ public actor Transcriber {
         }
     }
 
-
     // MARK: - Recognition Setup
     private func setupRecognition() throws -> SFSpeechAudioBufferRecognitionRequest {
         let request = SFSpeechAudioBufferRecognitionRequest()
 
         // Apply all configuration settings
         request.shouldReportPartialResults = config.shouldReportPartialResults
         request.requiresOnDeviceRecognition = config.requiresOnDeviceRecognition
-        request.addsPunctuation = config.addsPunctuation
+
+        if #available(iOS 16, *) {
+            request.addsPunctuation = config.addsPunctuation
+        }
+
         request.taskHint = config.taskHint
 
         // Only set contextual strings if provided
@@ -91,21 +89,15 @@ public actor Transcriber {
     private func startCombinedStream() async throws -> AsyncThrowingStream<String, Error> {
         logger.debug("Starting transcription stream...")
 
-        if let languageModelManager = languageModelManager {
-            try await languageModelManager.waitForModel()
-        }
-
-        // Reset state
-        resetRecognitionState()
-
         let localRequest = try setupRecognition()
 
-        // Configure language model if available
-        if let languageModel = languageModelManager {
-            try await languageModel.waitForModel()
-            if let lmConfig = await languageModel.getConfiguration() {
-                localRequest.requiresOnDeviceRecognition = true
-                localRequest.customizedLanguageModel = lmConfig
+        if #available(iOS 17, *) {
+            if let languageModel = configureLanguageModel() {
+                try await languageModel.waitForModel()
+                if let lmConfig = await languageModel.getConfiguration() {
+                    localRequest.requiresOnDeviceRecognition = true
+                    localRequest.customizedLanguageModel = lmConfig
+                }
             }
         }
 
@@ -143,7 +135,7 @@ public actor Transcriber {
             self.logger.debug("RMS: \(rms)")
 
             // Send RMS value to stream using local continuation
-            localRMSContinuation?.yield(rms) 
+            localRMSContinuation?.yield(rms)
             // Send RMS value to stream using local continuation
             if silenceState.update(
                 rms: rms,
@@ -295,6 +287,12 @@ public actor Transcriber {
             }
         }
     }
+
+    @available(iOS 17, *)
+    private func configureLanguageModel() -> LanguageModelManager? {
+        guard let modelInfo = config.languageModelInfo else { return nil }
+        return LanguageModelManager(modelInfo: modelInfo)
+    }
 }
 
 // MARK: - SilenceState

Sources/Transcriber/LanguageModel/LanguageModelManager.swift

@@ -3,6 +3,7 @@
 import Speech
 
 /// Manages custom language model preparation and configuration
+@available(iOS 17.0, *)
 public actor LanguageModelManager {
     private var hasBuiltLm = false
     private var customLmTask: Task<Void, Error>?

Sources/Transcriber/SwiftUI/DefaultTranscriberPresenter.swift

@@ -5,6 +5,7 @@ import AVFoundation
 
 /// Default implementation of SpeechRecognitionPresenter
 /// Provides ready-to-use speech recognition functionality for SwiftUI views
+@available(iOS 17.0, *)
 @Observable
 @MainActor
 public class DefaultTranscriberPresenter: TranscriberPresenter {
@@ -124,3 +125,123 @@ public class DefaultTranscriberPresenter: TranscriberPresenter {
     }
     #endif
 }
+
+@available(iOS, introduced: 15.0, deprecated, renamed: "DefaultTranscriberPresenter", message: "Use DefaultTranscriberPresenter instead.")
+@MainActor
+public class LegacyTranscriberPresenter: TranscriberPresenter, ObservableObject {
+    @Published public var isRecording = false
+    @Published public var transcribedText = ""
+    @Published public var authStatus: SFSpeechRecognizerAuthorizationStatus = .notDetermined
+    @Published public var error: Error?
+    @Published public var rmsLevel: Float = 0
+
+    private let transcriber: Transcriber?
+    private var recordingTask: Task<Void, Never>?
+    private var onCompleteHandler: ((String) -> Void)?
+
+    #if os(iOS)
+    @Published public var availableInputs: [AVAudioSessionPortDescription] = []
+    @Published public var selectedInput: AVAudioSessionPortDescription?
+    #endif
+
+    public init(config: TranscriberConfiguration = TranscriberConfiguration()) {
+        self.transcriber = Transcriber(config: config, debugLogging: true)
+
+        #if os(iOS)
+        setupAudioSession()
+        self.fetchAvailableInputs()
+        #endif
+    }
+
+    private func setupAudioSession() {
+        do {
+            let session = AVAudioSession.sharedInstance()
+            // Configure for both playback and recording with all possible options
+            try session.setCategory(.playAndRecord, mode: .spokenAudio, options: [
+                .allowAirPlay,
+                .allowBluetooth,
+                .allowBluetoothA2DP,
+                .defaultToSpeaker
+            ])
+            // Set preferred I/O buffer duration
+            try session.setPreferredIOBufferDuration(0.005)
+            try session.setActive(true)
+        } catch {
+            fatalError("Error: \(error.localizedDescription)")
+        }
+    }
+
+    public func toggleRecording(onComplete: ((String) -> Void)? = nil) {
+        self.onCompleteHandler = onComplete
+
+        guard let transcriber else {
+            error = TranscriberError.noRecognizer
+            return
+        }
+
+        if isRecording {
+            recordingTask?.cancel()
+            recordingTask = nil
+            Task {
+                await transcriber.stopStream()
+                isRecording = false
+                onCompleteHandler?(transcribedText)
+            }
+        } else {
+            transcribedText = "" // Reset text when starting new recording
+            recordingTask = Task {
+                do {
+                    isRecording = true
+                    let stream = try await transcriber.startStream()
+
+                    for try await signal in stream {
+                        switch signal {
+                        case .rms(let float):
+                                print("PRESENTER RMS: \(float)")
+                            rmsLevel = float
+                        case .transcription(let string):
+                            transcribedText = string
+                        }
+                    }
+
+                    // Stream ended naturally (silence detected)
+                    isRecording = false
+                    onCompleteHandler?(transcribedText)
+                } catch {
+                    self.error = error
+                    isRecording = false
+                }
+            }
+        }
+    }
+
+    public func requestAuthorization() async throws {
+        guard let transcriber else {
+            throw TranscriberError.noRecognizer
+        }
+        authStatus = await transcriber.requestAuthorization()
+        guard authStatus == .authorized else {
+            throw TranscriberError.notAuthorized
+        }
+    }
+
+    #if os(iOS)
+    public func fetchAvailableInputs() {
+        availableInputs = AudioInputs.getAvailableInputs()
+        // Set initial selection to current input
+        if let currentInput = AVAudioSession.sharedInstance().currentRoute.inputs.first,
+           let matchingInput = availableInputs.first(where: { $0.uid == currentInput.uid }) {
+            selectedInput = matchingInput
+        }
+    }
+
+    public func selectInput(_ input: AVAudioSessionPortDescription) {
+        do {
+            try AudioInputs.selectInput(input)
+            selectedInput = input
+        } catch {
+            self.error = TranscriberError.audioSessionFailure(error)
+        }
+    }
+    #endif
+}

Sources/Transcriber/UI/SpeechButton.swift

@@ -129,13 +129,13 @@ public struct SpeechButton: View {
         .onTapGesture {
             onTap()
         }
-        .onChange(of: isRecording) { _, newIsRecording in
+        .onChange(of: isRecording) { newIsRecording in
             updateState(isRecording: newIsRecording, isProcessing: isProcessing)
         }
-        .onChange(of: isProcessing) { _, newIsProcessing in
+        .onChange(of: isProcessing) { newIsProcessing in
             updateState(isRecording: isRecording, isProcessing: newIsProcessing)
         }
-        .onChange(of: rmsValue) { _, newRMS in
+        .onChange(of: rmsValue) { newRMS in
             updateAmplitudes(with: newRMS)
         }
         .onAppear {