import { type HalfPeriodProvider } from './half_period_provider/HalfPeriodProvider.js';
export declare class DynamicSyncFinder {
    private readonly halfPeriodProvider;
    private readonly minHalfPeriods;
    private readonly maxRelativeDeviation;
    /**
     * @param minHalfPeriods minimal number of half periods so search for
     * @param maxRelativeDeviation maximum allowed relative deviation of frequency within sync
     */
    constructor(halfPeriodProvider: HalfPeriodProvider, minHalfPeriods: number, maxRelativeDeviation?: number);
    /**
     * Find a valid sync sequence of unknown frequency and leave the HalfPeriodProvider
     * positioned at the beginning of the first half period that does not belong to the
     * sync itself.
     *
     * @returns detected frequency if sync sequence was found, otherwise undefined
     */
    findSync(): number | undefined;
    private startMeasuring;
}