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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,112 @@ | ||
| // | ||
| // SpeechService.swift | ||
| // Enchanted | ||
| // | ||
| // Created by Augustinas Malinauskas on 26/05/2024. | ||
| // | ||
|
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| import Foundation | ||
| import AVFoundation | ||
| import SwiftUI | ||
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| class SpeechSynthesizerDelegate: NSObject, AVSpeechSynthesizerDelegate { | ||
| var onSpeechFinished: (() -> Void)? | ||
| var onSpeechStart: (() -> Void)? | ||
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| func speechSynthesizer(_ synthesizer: AVSpeechSynthesizer, didFinish utterance: AVSpeechUtterance) { | ||
| onSpeechFinished?() | ||
| } | ||
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| func speechSynthesizer(_ synthesizer: AVSpeechSynthesizer, didStart utterance: AVSpeechUtterance) { | ||
| onSpeechStart?() | ||
| } | ||
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| func speechSynthesizer(_ synthesizer: AVSpeechSynthesizer, didReceiveError error: Error, for utterance: AVSpeechUtterance, at characterIndex: UInt) { | ||
| print("Speech synthesis error: \(error)") | ||
| } | ||
| } | ||
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| @MainActor final class SpeechSynthesizer: NSObject, ObservableObject { | ||
| static let shared = SpeechSynthesizer() | ||
| private let synthesizer = AVSpeechSynthesizer() | ||
| private let delegate = SpeechSynthesizerDelegate() | ||
|
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| @Published var isSpeaking = false | ||
| @Published var voices: [AVSpeechSynthesisVoice] = [] | ||
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| override init() { | ||
| super.init() | ||
| synthesizer.delegate = delegate | ||
| voices = listAllVoices() | ||
| } | ||
|
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| func getVoiceIdentifier() -> String? { | ||
| let voiceIdentifier = UserDefaults.standard.string(forKey: "voiceIdentifier") | ||
| if let voice = voices.first(where: {$0.identifier == voiceIdentifier}) { | ||
| return voice.identifier | ||
| } | ||
|
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| return voices.first?.identifier | ||
| } | ||
|
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| var lastCancelation: (()->Void)? = {} | ||
|
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| func speak(text: String, onFinished: @escaping () -> Void = {}) async { | ||
| guard let voiceIdentifier = getVoiceIdentifier() else { | ||
| print("could not find identifier") | ||
| return | ||
| } | ||
|
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| print("selected", voiceIdentifier) | ||
|
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| #if os(iOS) | ||
| let audioSession = AVAudioSession() | ||
| do { | ||
| try audioSession.setCategory(.playback, mode: .default, options: .duckOthers) | ||
| try audioSession.setActive(false) | ||
| } catch let error { | ||
| print("❓", error.localizedDescription) | ||
| } | ||
| #endif | ||
|
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| lastCancelation = onFinished | ||
| delegate.onSpeechFinished = { | ||
| withAnimation { | ||
| self.isSpeaking = false | ||
| } | ||
| onFinished() | ||
| } | ||
| delegate.onSpeechStart = { | ||
| withAnimation { | ||
| self.isSpeaking = true | ||
| } | ||
| } | ||
|
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| let utterance = AVSpeechUtterance(string: text) | ||
| utterance.voice = AVSpeechSynthesisVoice(identifier: voiceIdentifier) | ||
| utterance.rate = 0.5 | ||
| synthesizer.speak(utterance) | ||
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| let voices = AVSpeechSynthesisVoice.speechVoices() | ||
| voices.forEach { voice in | ||
| print("\(voice.identifier) - \(voice.name)") | ||
| } | ||
| } | ||
|
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| func stopSpeaking() async { | ||
| withAnimation { | ||
| isSpeaking = false | ||
| } | ||
| lastCancelation?() | ||
| synthesizer.stopSpeaking(at: .immediate) | ||
| } | ||
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| func listAllVoices() -> [AVSpeechSynthesisVoice] { | ||
| let voices = AVSpeechSynthesisVoice.speechVoices().sorted { (firstVoice: AVSpeechSynthesisVoice, secondVoice: AVSpeechSynthesisVoice) -> Bool in | ||
| return firstVoice.quality.rawValue > secondVoice.quality.rawValue | ||
| } | ||
| return voices | ||
| } | ||
| } |
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