import { Observable } from 'rxjs/Observable';
export interface ImageElement extends HTMLImageElement {
    exif: any;
    iptc: any;
    xmp: any;
}
export declare class ExifService {
    /**
     * Private variables
     */
    private _debug;
    private _isXmpEnabled;
    private _fileType;
    private _errorMessage;
    /**
     * Public variables
     */
    exifTags: any;
    tiffTags: any;
    gpsTags: any;
    /**
     * EXIF 2.3 Spec
     */
    ifd1Tags: any;
    stringValues: any;
    iptcFieldMap: any;
    enableXmp(): void;
    disableXmp(): void;
    fileType(imageFormat: string): void;
    constructor();
    getData(image: HTMLImageElement | Blob | File | ArrayBuffer | string): Observable<ImageElement>;
    getTag(imageData: ImageElement, tag: string): any;
    getIptcTag(imageData: ImageElement, tag: string): any;
    getAllTags(imageData: ImageElement): any;
    getAllIptcTags(imageData: ImageElement): any;
    pretty(imageData: ImageElement): string;
    private getImageData(image);
    private findAndSetImageTagData(binaryFile);
    private addImageSourceFromArrayBuffer(data, binaryFile);
    private addImageSource(data, imageString);
    /**
     * Convert the ArrayBuffer to a base 64 string
     *
     * @param buffer ArrayBuffer returned from the file reader
     *
     * @return A base64 string of the provided image
     */
    private arrayBufferToBase64(buffer);
    private base64ToArrayBuffer(base64);
    private objectURLToBlob(url, callback);
    private findEXIFinJPEG(file);
    private findIPTCinJPEG(file);
    private readIPTCData(file, startOffset, sectionLength);
    private readTags(file, tiffStart, dirStart, strings, bigEnd);
    private readTagValue(file, entryOffset, tiffStart, dirStart, bigEnd);
    private readThumbnailImage(dataView, tiffStart, firstIFDOffset, bigEnd);
    /**
     * Given an IFD (Image File Directory) start offset
     * returns an offset to next IFD or 0 if it's the last IFD.
     */
    private getNextIFDOffset(dataView, dirStart, bigEnd);
    private readEXIFData(file, start);
    private getStringFromDB(buffer, start, length);
    private findXMPinJPEG(file);
    private xml2json(xml);
    private xml2Object(xml);
    private imageHasData(imageData);
    private log(...args);
}