import type { CaptionResource } from './types';
export declare class CaptionManager {
    private adTrackEls;
    private prevActiveCaptionSig;
    captionsSignature(t: any): string;
    listCaptionTracks(media: any): any[];
    captureActiveCaptionTrack(media: any): void;
    restoreActiveTextTrack(media: HTMLMediaElement | undefined): void;
    ensureRawCaptions(mediaFileRaw: any, creative?: any): CaptionResource[];
    attachAdCaptionTracks(adVideo: HTMLVideoElement, mediaFileRaw: any, creative?: any): HTMLTrackElement[];
    clearAdTracks(): void;
    removeAdCaptions(): void;
}
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