import { AsyncMedia } from './AsyncMedia.js';
import { BackingMediaSourceType } from './BackingMediaSourceType.js';
export type BackingMediaSource = CanvasImageSource | AsyncMedia;
export declare function getBackingMediaSourceType(media: BackingMediaSource | null): BackingMediaSourceType;
export declare function urlToBackingMediaSource(url: string): [media: BackingMediaSource, type: BackingMediaSourceType];