/**
 * @param {string} inputType - the type of input used in file ("base64", "path", "dummy").
 *                             NB: dummy is only used for tests purposes
 */
export interface InputConstructor {
    inputType: string;
}
export declare const INPUT_TYPE_STREAM = "stream";
export declare const INPUT_TYPE_BASE64 = "base64";
export declare const INPUT_TYPE_BYTES = "bytes";
export declare const INPUT_TYPE_PATH = "path";
export declare const INPUT_TYPE_BUFFER = "buffer";
export declare abstract class InputSource {
    fileObject: Buffer | string;
    init(): Promise<void>;
}