import { type FrequencyRange } from './Frequency.js';
import { type HalfPeriodProvider } from './half_period_provider/HalfPeriodProvider.js';
export declare class SyncFinder {
    private readonly halfPeriodProvider;
    private readonly fSync;
    private readonly minHalfPeriods;
    /**
     * @param fSync accepted frequency range for sync half periods
     * @param minHalfPeriods minimal number of half periods so search for
     */
    constructor(halfPeriodProvider: HalfPeriodProvider, fSync: FrequencyRange, minHalfPeriods: number);
    /**
     * Find a valid sync sequence and leave the HalfPeriodProvider positioned at
     * the beginning of the first half period that does not belong to the sync itself.
     *
     * @returns true if a sync sequence was found
     */
    findSync(): boolean;
    private findSyncStart;
    /**
     * @returns sync length in half periods
     */
    private findSyncEnd;
}