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/*
* Copyright (c) 2001-2007, Eric M. Johnston <emj@postal.net>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Eric M. Johnston.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: exif.h,v 1.38 2007/12/16 03:44:32 ejohnst Exp $
*/
/*
* Exchangeable image file format (Exif) parser.
*
* Developed using the TIFF 6.0 specification
* (http://partners.adobe.com/asn/developer/pdfs/tn/TIFF6.pdf)
* and the EXIF 2.21 standard: (http://tsc.jeita.or.jp/avs/data/cp3451_1.pdf).
*
*/
#ifndef _EXIF_H
#define _EXIF_H
#include <sys/types.h>
/*
* XXX Only checking for Solaris, HP, & Windows now. Other platforms will
* probably need something similar if they don't have u_int16_t or u_int32_t.
*/
#if (defined(sun) && (defined(__svr4__) || defined(__SVR4)))
typedef unsigned short u_int16_t;
typedef unsigned int u_int32_t;
#endif
#if (defined(__hpux))
typedef uint16_t u_int16_t;
typedef uint32_t u_int32_t;
#endif
#ifdef WIN32
typedef unsigned __int16 u_int16_t;
typedef unsigned __int32 u_int32_t;
typedef __int16 int16_t;
typedef __int32 int32_t;
#define snprintf _snprintf
#define isnan _isnan
#endif
#ifndef TRUE
#define TRUE 1
#endif
#ifndef FALSE
#define FALSE 0
#endif
/* TIFF types. */
#define TIFF_UNKN 0
#define TIFF_BYTE 1
#define TIFF_ASCII 2
#define TIFF_SHORT 3
#define TIFF_LONG 4
#define TIFF_RTNL 5
#define TIFF_SBYTE 6
#define TIFF_UNDEF 7
#define TIFF_SSHORT 8
#define TIFF_SLONG 9
#define TIFF_SRTNL 10
#define TIFF_FLOAT 11
#define TIFF_DBL 12
/* Dump level. */
#define ED_UNK 0x01 /* Unknown or unimplemented info. */
#define ED_CAM 0x02 /* Camera-specific info. */
#define ED_IMG 0x04 /* Image-specific info. */
#define ED_VRB 0x08 /* Verbose info. */
#define ED_PAS 0x10 /* Point-and-shoot info. */
#define ED_OVR 0x20 /* Overridden info. */
#define ED_BAD 0x40 /* 'Bad' or incorrect info (given other values). */
/* Interesting tags. */
#define EXIF_T_UNKNOWN 0xffff /* XXX Non-standard. */
#define EXIF_T_COMPRESS 0x0103
#define EXIF_T_PHOTOINTERP 0x0106
#define EXIF_T_EQUIPMAKE 0x010f
#define EXIF_T_MODEL 0x0110
#define EXIF_T_ORIENT 0x0112
#define EXIF_T_XRES 0x011a
#define EXIF_T_YRES 0x011b
#define EXIF_T_PLANARCONFIG 0x011c
#define EXIF_T_RESUNITS 0x0128
#define EXIF_T_XFERFUNC 0x012d
#define EXIF_T_DATETIME 0x0132
#define EXIF_T_CHROMRATIO 0x0212
#define EXIF_T_CHROMPOS 0x0213
#define EXIF_T_EXPOSURE 0x829a
#define EXIF_T_FNUMBER 0x829d
#define EXIF_T_EXPPROG 0x8822
#define EXIF_T_GPSIFD 0x8825
#define EXIF_T_ISOSPEED 0x8827
#define EXIF_T_VERSION 0x9000
#define EXIF_T_DATETIMEORIG 0x9003
#define EXIF_T_DATETIMEDIGI 0x9004
#define EXIF_T_COMPCONFIG 0x9101
#define EXIF_T_SHUTTER 0x9201
#define EXIF_T_LAPERTURE 0x9202
#define EXIF_T_BRIGHTVAL 0x9203
#define EXIF_T_EXPBIASVAL 0x9204
#define EXIF_T_MAXAPERTURE 0x9205
#define EXIF_T_DISTANCE 0x9206
#define EXIF_T_METERMODE 0x9207
#define EXIF_T_LIGHTSRC 0x9208
#define EXIF_T_FLASH 0x9209
#define EXIF_T_FOCALLEN 0x920a
#define EXIF_T_USERCOMMENT 0x9286
#define EXIF_T_COLORSPC 0xa001
#define EXIF_T_FPXRES 0xa20e
#define EXIF_T_FPYRES 0xa20f
#define EXIF_T_FPRESUNITS 0xa210
#define EXIF_T_IMGSENSOR 0xa217
#define EXIF_T_FILESRC 0xa300
#define EXIF_T_SCENETYPE 0xa301
#define EXIF_T_EXPMODE 0xa402
#define EXIF_T_WHITEBAL 0xa403
#define EXIF_T_DIGIZOOM 0xa404
#define EXIF_T_FOCALLEN35 0xa405
#define EXIF_T_SCENECAPTYPE 0xa406
#define EXIF_T_CONTRAST 0xa408
#define EXIF_T_SATURATION 0xa409
#define EXIF_T_SHARPNESS 0xa40a
/* Byte order. */
enum byteorder { LITTLE, BIG };
/* Generic field description lookup table. */
struct descrip {
int32_t val;
const char *descr;
};
/* Tag lookup table. */
struct exiftag {
u_int16_t tag; /* Tag ID. */
u_int16_t type; /* Expected type. */
u_int16_t count; /* Expected count. */
unsigned short lvl; /* Output level. */
const char *name;
const char *descr;
struct descrip *table; /* Value lookup table. */
};
/* Final Exif property info. (Note: descr can be NULL.) */
struct exifprop {
u_int16_t tag; /* The Exif tag. */
u_int16_t type;
u_int32_t count;
u_int32_t value;
const char *name;
const char *descr;
char *str; /* String representation of value (dynamic). */
unsigned short lvl; /* Verbosity level. */
int ifdseq; /* Sequence number of parent IFD. */
u_int16_t override; /* Override display of another tag. */
struct exiftag *tagset; /* Tags used to create property. */
struct exifprop *par; /* Parent property association. */
struct exifprop *next;
};
/*
* TIFF/IFD metadata.
*
* Implementation note: ordinarily, this information wouldn't be stored
* at the directory (IFD) level -- it's characteristic of the TIFF itself.
* However, the format of some maker notes force this level of detail.
* For example, Fuji notes can be in a different byte order than the rest of
* the TIFF. Also, some Nikon notes actually contain a full TIFF header
* and specify their own byte order and offset base.
*
* Therefore, while this information is generally true for the TIFF, it
* may not apply to maker note properties.
*/
struct tiffmeta {
enum byteorder order; /* Endianness of IFD. */
unsigned char *btiff; /* Beginning of TIFF (offset base). */
unsigned char *etiff; /* End of TIFF. */
void *ifdoffs; /* List of IFD offsets (internal only). */
};
/* Image info and exifprop pointer returned by exifscan(). */
struct exiftags {
struct exifprop *props; /* The good stuff. */
struct tiffmeta md; /* Beginning, end, and endianness of TIFF. */
const char *model; /* Camera model, to aid maker tag processing. */
short mkrval; /* Maker index (see makers.h). */
struct tiffmeta mkrmd; /* Maker TIFF info. */
/* Version info. */
short exifmaj; /* Exif version, major. */
short exifmin; /* Exif version, minor. */
};
/* Eternal interfaces. */
extern int debug;
extern const char *progname;
extern struct exiftag tags[];
extern struct exifprop *findprop(struct exifprop *prop,
struct exiftag *tagset, u_int16_t tag);
extern void exifdie(const char *msg);
extern void exifwarn(const char *msg);
extern void exifwarn2(const char *msg1, const char *msg2);
extern void exiffree(struct exiftags *t);
extern struct exiftags *exifscan(unsigned char *buf, int len, int domkr);
extern struct exiftags *exifparse(unsigned char *buf, int len);
#endif
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