tdegraphics/kfile-plugins/jpeg/exif.h

#ifndef __EXIF_H__
#define __EXIF_H__

/**
	exif.h
*/

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <time.h>

#include "qstring.h"
#include "qfile.h"
#include "qimage.h"
#include <kdebug.h>

typedef enum {
    READ_EXIF = 1,
    READ_IMAGE = 2,
    READ_ALL = 3
}ReadMode_t;

//--------------------------------------------------------------------------
// This structure is used to store jpeg file sections in memory.
typedef struct {
    uchar *  Data;
    int      Type;
    unsigned Size;
}Section_t;

typedef unsigned char uchar;

typedef struct {
    unsigned short Tag;
    const char*const Desc;
}TagTable_t;

#define MAX_SECTIONS 20
#define PSEUDO_IMAGE_MARKER 0x123; // Extra value.

class ExifData {
    Section_t Sections[MAX_SECTIONS];

    QString CameraMake;
    QString CameraModel;
    QString DateTime;
    int   Orientation;
    int   Height, Width;
    int   ExifImageLength, ExifImageWidth;
    int   IsColor;
    int   Process;
    int   FlashUsed;
    float FocalLength;
    float ExposureTime;
    float ApertureFNumber;
    float Distance;
    int    Whitebalance;
    int    MeteringMode;
    float CCDWidth;
    float ExposureBias;
    int   ExposureProgram;
    int   ISOequivalent;
    int   CompressionLevel;
    QString UserComment;
    QString Comment;
    QImage Thumbnail;

    int ReadJpegSections (QFile & infile, ReadMode_t ReadMode);
    void DiscardData(void);
    int Get16u(void * Short);
    int Get32s(void * Long);
    unsigned Get32u(void * Long);
    double ConvertAnyFormat(void * ValuePtr, int Format);
    void ProcessExifDir(unsigned char * DirStart, unsigned char * OffsetBase, unsigned ExifLength,
            unsigned NestingLevel);
    void process_COM (const uchar * Data, int length);
    void process_SOFn (const uchar * Data, int marker);
    int Get16m(const void * Short);
    void process_EXIF(unsigned char * CharBuf, unsigned int length);
    int Exif2tm(struct tm * timeptr, char * ExifTime);

public:
    ExifData();
    bool scan(const QString &);
    QString getCameraMake() { return CameraMake; }
    QString getCameraModel() { return CameraModel; }
    QString getDateTime() { return DateTime; }
    int getOrientation() { return Orientation; }
    int getHeight() { return Height; }
    int getWidth() { return Width; }
    int getIsColor() { return IsColor; }
    int getProcess() { return Process; }
    int getFlashUsed() { return FlashUsed; }
    float getFocalLength() { return FocalLength; }
    float getExposureTime() { return ExposureTime; }
    float getApertureFNumber() { return ApertureFNumber; }
    float getDistance() { return Distance; }
    int getWhitebalance() { return Whitebalance; }
    int getMeteringMode() { return MeteringMode; }
    float getCCDWidth() { return CCDWidth; }
    float getExposureBias() { return ExposureBias; }
    int getExposureProgram() { return ExposureProgram; }
    int getISOequivalent() { return ISOequivalent; }
    int getCompressionLevel() { return CompressionLevel; }
    QString getUserComment() { return UserComment; }
    QString getComment() { return Comment; }
    QImage getThumbnail();
    bool isThumbnailSane();
    bool isNullThumbnail() { return !isThumbnailSane(); }
};

class FatalError {
    const char* ex;
public:
    FatalError(const char* s) { ex = s; }
    void debug_print() const { kdDebug(7034) << "exception: " << ex << endl; }
};

extern TagTable_t ProcessTable[];

//--------------------------------------------------------------------------
// Define comment writing code, impelemented in setcomment.c
extern int safe_copy_and_modify( const char * original_filename, const char * comment );

#endif