import { type Easing, type TimelineClip } from '../types/timeline.js';
export declare function clamp(v: number, lo: number, hi: number): number;
/** Easing applied to a 0→1 progress value. `bounce`/`pop` presets override this
 * with their own spring-ish curve regardless of the chosen easing. */
export declare function ease(t: number, easing: Easing): number;
/** Inline-style fragments for a clip at a given playhead time. Identity values
 * (`opacity:1, transform:'none', …`) when the clip has no animation or the
 * playhead is outside its enter/exit windows. */
export type AnimStyle = {
    opacity: number;
    transform: string;
    filter: string;
    clipPath: string;
};
export declare function clipAnimStyle(clip: TimelineClip, playheadSec: number, fps: number): AnimStyle;