import { PDFDocumentLoadingTask, PDFDocumentProxy } from 'pdf.js/src/display/api';
import { PDFSource, PDFSourceOptions, PDFSourceWithOptions } from '../types';
/**
 * Parses a PDF source file and returns a PDFDocumentLoadingTask.
 * @param {PDFSource} source - The source of the PDF file.
 * @returns {Promise<PDFDocumentLoadingTask>} A promise that resolves to a PDFDocumentLoadingTask.
 * @throws {Error} If the source is invalid.
 */
export declare function parseSourceFile(source: PDFSource): Promise<PDFDocumentLoadingTask>;
/**
 * Processes a PDF source and returns a PDFDocumentProxy.
 * @param {PDFSource | PDFSourceWithOptions} inputSource - The input source of the PDF file.
 * @param {PDFSourceOptions} [sourceOptions] - Optional source options.
 * @returns {Promise<PDFDocumentProxy | null>} A promise that resolves to a PDFDocumentProxy or null.
 */
export declare function processSource(inputSource: PDFSource | PDFSourceWithOptions, sourceOptions?: PDFSourceOptions): Promise<PDFDocumentProxy | null>;