import { VisemeData } from '../types';

export interface ParsedViseme {
    time: number;
    viseme: string | null;
}
/**
 * Maps the raw `visemeJson` entries to morph-target names using the provided
 * code→morph map, dropping any codes that don't resolve to a morph.
 */
export declare function parseVisemes(visemeJson: VisemeData, map: Record<string, string>): ParsedViseme[];
/**
 * Returns the most recent viseme at or before `currentTime` (the timeline is
 * scanned newest-first), or `null` if none applies yet.
 */
export declare function findActiveViseme(visemeData: ParsedViseme[], currentTime: number): ParsedViseme | null;
/**
 * Triangular blink influence (0 → 1 → 0) for a given time `into` the blink,
 * over `duration` seconds. Returns 0 outside the blink window.
 */
export declare function blinkPulse(into: number, duration?: number): number;