/// <reference types="dom-speech-recognition" />
export declare class Discussion {
    private factory;
    recognitionLanguageCode: string;
    synthesisLanguageCode: string;
    recognitionMaxAlternatives: number;
    /**
     * Results of the SpeechRecognition will arrive here
     */
    onRecognitionResult: (ev: SpeechRecognitionEvent) => any;
    private recognition;
    private utterance;
    private preferedVoice;
    private isSynthesizing;
    private isRecognitionEnabled;
    private isGoodVoice;
    private voices;
    /**
     * Constructs the class. Make sure to call initialize() as well afterwards when your page is ready to go.
     * @param recognitionLanguageCode
     * @param synthesisLanguageCode
     * @param recognitionMaxAlternatives how many guesses for the recognition should be returned? (See https://developer.mozilla.org/en-US/docs/Web/API/SpeechRecognition/maxAlternatives)
     */
    constructor(factory: () => SpeechRecognition, recognitionLanguageCode?: string, synthesisLanguageCode?: string, recognitionMaxAlternatives?: number);
    /**
     * Lists all available synthesis voices. This list will only be filled after initialize() was called
     * */
    getSynthesisVoices(): SpeechSynthesisVoice[];
    /**
     * Indicates whether the current synthesis language is installed locally (and thus faster in ending)
     * */
    hasGoodVoice(): boolean;
    /**
     * Disable the recognition
     * */
    disableRecognition(): void;
    /**
     * Re-enable the recognition
     * */
    enableRecognition(): void;
    private toggleRecognition;
    /**
     * Setup the recognition and synthesis
     * */
    initialize(): void;
    private initializeSynthesis;
    private initializeRecognition;
    /**
     * Synthesize something to the user
     * @param text what to say
     * @param pitch at which pitch to say it (from 0 to 2)
     * @param rate how fast to say it (from 0.1 to 10)
     * @param volume how loud to say it (from 0 to 1)
     * @recognitionWaitPeriod While synthesizing, the recognition has to be stopped. Set this parameter to start listening again after N milliseconds. Set this parameter to 0 to wait until the synthesis is completely over (may take +- 1 second AFTER the voice is finished).
     */
    synthesize(text: string, pitch?: number, rate?: number, volume?: number, recognitionWaitPeriod?: number): void;
    private keepSpeechRecognitionAlive;
}