import { StaffInfo, TempoInfo, TimeSignatureInfo, KeySignatureInfo } from './staff_info';
export interface BarInfo {
    start: number;
    barNumber: number;
    barLength: number;
    tempo: TempoInfo;
    keySignature: KeySignatureInfo;
    timeSignature: TimeSignatureInfo;
    tempoChange?: boolean;
    keyChange?: boolean;
    timeChange?: boolean;
}
export declare class BarsInfo {
    allowDottedRests?: boolean;
    private barsInfo;
    constructor(staffInfo: StaffInfo, lastQ: number);
    barNumberAtQ(start: number): number;
    barLenghtAtQ(start: number): number;
    tempoAtQ(_start: number, onlyChanges?: boolean): number;
    keySignatureAtQ(start: number, onlyChanges?: boolean): number;
    timeSignatureAtQ(start: number, onlyChanges?: boolean): TimeSignatureInfo;
    quartersToTime(quarters: number): number;
    timeToQuarters(time: number): number;
}