import { Action, Speech } from '../SpeechModule';
export interface ICognitiveServicesSpeechSynthesisProperties {
    subscriptionKey?: string;
    gender?: SynthesisGender;
    voiceName?: string;
    onSpeakingStarted?: Action;
    onSpeakingFinished?: Action;
    onEarlySpeakingFinished?: Action;
    localAudioMap?: {
        [key: string]: string;
    };
    phonemeReplacementMap?: Map<string, string>;
    localAudioCacheLimit?: number;
    region?: string;
    fetchCallback?: (authFetchEventId: string) => Promise<string>;
    fetchOnExpiryCallback?: (authFetchEventId: string) => Promise<string>;
}
export declare enum SynthesisGender {
    Male = 0,
    Female = 1
}
export declare class SpeechSynthesizer implements Speech.ISpeechSynthesizer {
    private static readonly PLAYER_TIMER_INTERVAL;
    private static readonly SILENCE_TRIM_TIME;
    private _requestQueue;
    private _localAudioCacheMap;
    private _isPlaying;
    private _localAudioPlayer;
    private _audioElement;
    private _helper;
    private _properties;
    private _onSpeakingStarted;
    private _onSpeakingFinished;
    private _onEarlySpeakingFinished;
    private _localAudioMap?;
    private _phonemeReplacementMap?;
    private _localAudioCacheLimit;
    private _timerId;
    constructor(properties: ICognitiveServicesSpeechSynthesisProperties);
    cacheString: (text: string) => void;
    speak: (text: string, lang: string, onSpeakingStarted?: Action, onSpeakingFinished?: Action, onEarlySpeakingFinished?: Action) => void;
    stopSpeaking(): void;
    stopAudio(): void;
    private playAudio;
    private replacePhonemes;
    private cacheSpeechData;
    private getSpeechData;
    private log;
}