/** @format */
import { ExifData } from '../../exif/exif-data.js';
/**
 * Utility class for handling JPEG operations, including reading and writing EXIF data.
 */
export declare class JpegUtils {
    /**
     * EXIF signature constant.
     */
    private static readonly _exifSignature;
    /**
     * Reads EXIF data from the given input buffer.
     * @param {InputBuffer<Uint8Array> | undefined} block - The input buffer containing the EXIF data.
     * @returns {ExifData | undefined} The parsed EXIF data or undefined if the data is invalid.
     */
    private readExifData;
    /**
     * Writes the APP1 segment containing EXIF data to the output buffer.
     * @param {OutputBuffer} out - The output buffer to write to.
     * @param {ExifData} exif - The EXIF data to write.
     */
    private writeAPP1;
    /**
     * Reads a block of data from the input buffer.
     * @param {InputBuffer<Uint8Array>} input - The input buffer to read from.
     * @returns {InputBuffer<Uint8Array> | undefined} The read block or undefined if the block length is invalid.
     */
    private readBlock;
    /**
     * Skips a block of data in the input buffer and optionally writes it to the output buffer.
     * @param {InputBuffer<Uint8Array>} input - The input buffer to read from.
     * @param {OutputBuffer} [output] - The optional output buffer to write to.
     * @returns {boolean} True if the block was successfully skipped, false otherwise.
     */
    private skipBlock;
    /**
     * Reads the next marker from the input buffer and optionally writes it to the output buffer.
     * @param {InputBuffer<Uint8Array>} input - The input buffer to read from.
     * @param {OutputBuffer} [output] - The optional output buffer to write to.
     * @returns {number} The next marker value.
     */
    private nextMarker;
    /**
     * Decodes EXIF data from the given JPEG data.
     * @param {Uint8Array} data - The JPEG data to decode.
     * @returns {ExifData | undefined} The parsed EXIF data or undefined if the data is invalid.
     */
    decodeExif(data: Uint8Array): ExifData | undefined;
    /**
     * Injects EXIF data into the given JPEG data.
     * @param {ExifData} exif - The EXIF data to inject.
     * @param {Uint8Array} data - The JPEG data to inject into.
     * @returns {Uint8Array | undefined} The modified JPEG data with the injected EXIF data or undefined if the data is invalid.
     */
    injectExif(exif: ExifData, data: Uint8Array): Uint8Array | undefined;
}