import { CanvasSinkOptions, WrappedCanvas } from "mediabunny";
import { DecoderSource } from '../../driver/fns/schematic.js';
export declare class Filmstrip {
    #private;
    private duration;
    private options;
    private constructor();
    static init(source: DecoderSource, options: FilmstripOptions): Promise<Filmstrip>;
    get frequency(): number;
    /**
    * Updates filmstrip thumbnails when its range or frequency changes.
    *
    * @param update.range The current timeline viewport as a [start, end] tuple in seconds.
    * Thumbnails preload slightly outside the visible range.
    * @param update.frequency The granularity of filmstrip thumbnails in seconds.
    */
    update({ range: visibleRange, frequency }: FilmstripUpdate): void;
    /**
    * Returns the cached thumbnail (if any) for a given timestamp.
    * @param time - The timestamp to retrieve the canvas for.
    */
    getThumbnail(time: number): WrappedCanvas | undefined;
}
export type TimeRange = [start: number, end: number];
export type FilmstripUpdate = {
    range: TimeRange;
    frequency: number;
};
interface FilmstripOptions {
    frequency: number;
    canvasSinkOptions?: CanvasSinkOptions;
    onPlaceholders?: (timestamps: number[]) => void;
    onChange: (tiles: {
        time: number;
        canvas: WrappedCanvas;
    }[]) => void;
}
export {};