expo-speech/src/Speech/Speech.types.ts

Provides text-to-speech functionality.

export type SpeechEventCallback = (this: SpeechSynthesisUtterance, ev: SpeechSynthesisEvent) => any;

export type SpeechOptions = {
  language?: string;
  pitch?: number;
  rate?: number;
  onStart?: () => void | SpeechEventCallback;
  onStopped?: () => void | SpeechEventCallback;
  onDone?: () => void | SpeechEventCallback;
  onError?: (error: Error) => void | SpeechEventCallback;

  volume?: number;
  voice?: string;
  _voiceIndex?: number;
  onBoundary?: SpeechEventCallback | null;
  onMark?: SpeechEventCallback | null;
  onPause?: SpeechEventCallback | null;
  onResume?: SpeechEventCallback | null;
};

export enum VoiceQuality {
  Default = 'Default',
  Enhanced = 'Enhanced',
}

export type Voice = {
  identifier: string;
  name: string;
  quality: VoiceQuality;
  language: string;
};

export type WebVoice = Voice & {
  isDefault: boolean;
  localService: boolean;
  name: string;
  voiceURI: string;
};