import { Track, Uid, TrackElement } from './types.js';

/**
 * 给定一个有序数组 arr 和一个数 m，
 * 返回 m 落到的最小区间 [a, b]，使得 a < m <= b
 * a,b 为 arr 的下标
 */
declare const findInterval: (arr: number[], m: number) => [number, number] | null;
declare const handleMainTrackItemConnect: (mainTrack: Track, trackItemsMap: Record<Uid, TrackElement>) => Record<Uid, TrackElement>;
declare const filterChangedTrackItems: (originMap: Record<Uid, TrackElement>, curMap: Record<Uid, TrackElement>) => Uid[];
declare const getItemDuration: (item: TrackElement) => number;
declare const getItemEndPos: (item: TrackElement) => number;

export { filterChangedTrackItems, findInterval, getItemDuration, getItemEndPos, handleMainTrackItemConnect };