/**
 * Playback Engine
 *
 * Handles timeline control, event scheduling, and playback speed.
 */
import type { KakiatoEvent } from '../core/types.js';
export interface PlaybackOptions {
    speed?: number;
    loop?: boolean;
}
export type PlaybackEventHandler = (event: KakiatoEvent, index: number) => void;
export declare class PlaybackEngine {
    private events;
    private currentIndex;
    private isPlaying;
    private speed;
    private loop;
    private timeoutId;
    private startTime;
    private pausedAt;
    private onEventHandlers;
    constructor(options?: PlaybackOptions);
    /**
     * Load events for playback
     */
    loadEvents(events: KakiatoEvent[]): void;
    /**
     * Add event handler
     */
    onEvent(handler: PlaybackEventHandler): void;
    /**
     * Remove event handler
     */
    offEvent(handler: PlaybackEventHandler): void;
    /**
     * Start playback
     */
    play(): void;
    /**
     * Pause playback
     */
    pause(): void;
    /**
     * Stop playback and reset
     */
    stop(): void;
    /**
     * Seek to specific time (in milliseconds)
     */
    seek(time: number): void;
    /**
     * Set playback speed
     */
    setSpeed(speed: number): void;
    /**
     * Get current playback speed
     */
    getSpeed(): number;
    /**
     * Get current playback time
     */
    getCurrentTime(): number;
    /**
     * Get total duration
     */
    getDuration(): number;
    /**
     * Get current event index
     */
    getCurrentIndex(): number;
    /**
     * Check if playing
     */
    getIsPlaying(): boolean;
    /**
     * Schedule the next event
     */
    private scheduleNextEvent;
    /**
     * Emit event to all handlers
     */
    private emitEvent;
}
//# sourceMappingURL=engine.d.ts.map