/**
 * @fileoverview Browser-side live dictation engine.
 *
 * `LiveTranscriber` streams microphone audio to a recognizer and reports two kinds
 * of text: `onPartial`, the in-progress guess that keeps changing while a phrase is
 * being spoken, and `onCommit`, a phrase the recognizer has settled on. Callers use
 * the first to type text into an input as it is being said, and the second to
 * finalize it.
 *
 * Two engines are supported. The browser's own `SpeechRecognition` is preferred when
 * present because it needs no model download; otherwise the package's bundled
 * Moonshine model runs the recognition entirely on-device. Chromium's recognizer
 * stops itself after a pause, so a session that is still meant to be listening is
 * restarted automatically.
 */
export type TranscriberEngine = "auto" | "webspeech" | "moonshine";
export interface LiveTranscriberOptions {
    /** Which recognizer to use. Default `auto` (browser first, Moonshine as fallback). */
    engine?: TranscriberEngine;
    /** BCP-47 language tag for the browser recognizer. Default `en-US`. */
    language?: string;
    /** Moonshine model name. Default `model/small`. */
    model?: string;
    /** Fires continuously with the current in-progress phrase. */
    onPartial?: (text: string) => void;
    /** Fires once per phrase the recognizer has settled on. */
    onCommit?: (text: string) => void;
    /** Fires whenever the microphone starts or stops. */
    onStateChange?: (listening: boolean) => void;
    onError?: (error: Error) => void;
}
/** True when this browser can dictate at all (either engine). */
export declare function isTranscriptionSupported(): boolean;
export declare class LiveTranscriber {
    private options;
    private listening;
    /** Distinguishes a deliberate `stop()` from Chromium's idle auto-stop. */
    private stopRequested;
    private recognition;
    private moonshine;
    constructor(options?: LiveTranscriberOptions);
    setOptions(options: LiveTranscriberOptions): void;
    isListening(): boolean;
    start(): Promise<void>;
    stop(): Promise<void>;
    toggle(): Promise<void>;
    private setListening;
    private startWebSpeech;
    private startMoonshine;
}