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