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/** \file
*
* EXIF file format support library. This API allows to parse, read and
* modify EXIF data structures. It provides a low-level API which allows
* to manipulate EXIF tags in a generic way, and a higher-level API which
* provides more advanced functions such as comment editing, thumbnail
* extraction, etc.
*
* In the future, vendor-proprietary exif extensions might be supported.
*/
#ifndef _gphoto_exif_
#define _gphoto_exif_
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
/*
* Tag data type information.
*/
typedef enum {
EXIF_NOTYPE = 0, /* placeholder */
EXIF_BYTE = 1, /* 8-bit unsigned integer */
EXIF_ASCII = 2, /* 8-bit bytes w/ last byte null */
EXIF_SHORT = 3, /* 16-bit unsigned integer */
EXIF_LONG = 4, /* 32-bit unsigned integer */
EXIF_RATIONAL = 5, /* 64-bit unsigned fraction */
EXIF_SBYTE = 6, /* !8-bit signed integer */
EXIF_UNDEFINED = 7, /* !8-bit untyped data */
EXIF_SSHORT = 8, /* !16-bit signed integer */
EXIF_SLONG = 9, /* !32-bit signed integer */
EXIF_SRATIONAL = 10, /* !64-bit signed fraction */
EXIF_FLOAT = 11, /* !32-bit IEEE floating point */
EXIF_DOUBLE = 12 /* !64-bit IEEE floating point */
} EXIFDataType;
typedef struct exif_parser {
unsigned char *header,*data,*ifds[10];
int ifdtags[10]; /* How many tags in each ifd */
int ifdcnt; /* Number of IFD's, assumed to be < 10 */
unsigned int exiflen;
int preparsed,endian;
} exifparser;
typedef struct {
int tag; /* Tag ID, see exif_tags.h */
EXIFDataType type; /* Tag data type, see exif_tags.h */
int size; /* Length of the data, in bytes. */
unsigned char *data; /* The data itself, not an offset */
int num; /* When type is (s)rational, we */
int den; /* store the value here... */
int intval;
} ExifData;
/*
* The same as gpi_exif_get_thumbnail but returns
* also the thumbnail size
*/
unsigned char *gpi_exif_get_thumbnail_and_size(exifparser *exifdat, long *size);
/*
* COMMENT ME
*/
int gpi_exif_stat(exifparser *exifdata);
/*
* Now, all the 'defines'
*/
#define EXIF_InteroperabilityIndex 0x1
#define EXIF_InteroperabilityVersion 0x2
#define EXIF_RelatedImageFileFormat 0x1000
#define EXIF_RelatedImageWidth 0x1001
#define EXIF_RelatedImageLength 0x1002
#define EXIF_NewSubFileType 0xFE
#define EXIF_ImageWidth 0x100
#define EXIF_ImageLength 0x101
#define EXIF_BitsPerSample 0x102
#define EXIF_Compression 0x103
#define EXIF_PhotometricInterpretation 0x106
#define EXIF_FillOrder 0x10A
#define EXIF_DocumentName 0x10D
#define EXIF_ImageDescription 0x10E
#define EXIF_Make 0x10F
#define EXIF_Model 0x110
#define EXIF_StripOffsets 0x111
#define EXIF_Orientation 0x112
#define EXIF_SamplesPerPixel 0x115
#define EXIF_RowsPerStrip 0x116
#define EXIF_StripByteCounts 0x117
#define EXIF_XResolution 0x11A
#define EXIF_YResolution 0x11B
#define EXIF_PlanarConfiguration 0x11C
#define EXIF_ResolutionUnit 0x128
#define EXIF_TransferFunction 0x12D
#define EXIF_Software 0x131
#define EXIF_DateTime 0x132
#define EXIF_Artist 0x13B
#define EXIF_WhitePoint 0x13E
#define EXIF_PrimaryChromaticities 0x13F
#define EXIF_TransferRange 0x156
#define EXIF_JPEGProc 0x200
#define EXIF_JPEGInterchangeFormat 0x201
#define EXIF_JPEGInterchangeFormatLength 0x202
#define EXIF_YCbCrCoefficients 0x211
#define EXIF_YCbCrSubSampling 0x212
#define EXIF_YCbCrPositioning 0x213
#define EXIF_ReferenceBlackWhite 0x214
#define EXIF_CFARepeatPatternDim 0x828D
#define EXIF_CFAPattern 0x828E
#define EXIF_BatteryLevel 0x828F
#define EXIF_Copyright 0x8298
#define EXIF_ExposureTime 0x829A
#define EXIF_FNumber 0x829D
/* Be careful: the next tag's official name is IPTC/NAA but
we can't do a define with a "/" */
#define EXIF_IPTC_NAA 0x83BB
#define EXIF_ExifOffset 0x8769
#define EXIF_InterColorProfile 0x8773
#define EXIF_ExposureProgram 0x8822
#define EXIF_SpectralSensitivity 0x8824
#define EXIF_GPSInfo 0x8825
#define EXIF_ISOSpeedRatings 0x8827
#define EXIF_OECF 0x8828
#define EXIF_ExifVersion 0x9000
#define EXIF_DateTimeOriginal 0x9003
#define EXIF_DateTimeDigitized 0x9004
#define EXIF_ComponentsConfiguration 0x9101
#define EXIF_CompressedBitsPerPixel 0x9102
#define EXIF_ShutterSpeedValue 0x9201
#define EXIF_ApertureValue 0x9202
#define EXIF_BrightnessValue 0x9203
#define EXIF_ExposureBiasValue 0x9204
#define EXIF_MaxApertureValue 0x9205
#define EXIF_SubjectDistance 0x9206
#define EXIF_MeteringMode 0x9207
#define EXIF_LightSource 0x9208
#define EXIF_Flash 0x9209
#define EXIF_FocalLength 0x920A
#define EXIF_MakerNote 0x927C
#define EXIF_UserComment 0x9286
#define EXIF_SubSecTime 0x9290
#define EXIF_SubSecTimeOriginal 0x9291
#define EXIF_SubSecTimeDigitized 0x9292
#define EXIF_FlashPixVersion 0xA000
#define EXIF_ColorSpace 0xA001
#define EXIF_ExifImageWidth 0xA002
#define EXIF_ExifImageLength 0xA003
#define EXIF_InteroperabilityOffset 0xA005
#define EXIF_FlashEnergy 0xA20B /* 0x920B in TIFF/EP */
#define EXIF_SpatialFrequencyResponse 0xA20C /* 0x920C - - */
#define EXIF_FocalPlaneXResolution 0xA20E /* 0x920E - - */
#define EXIF_FocalPlaneYResolution 0xA20F /* 0x920F - - */
#define EXIF_FocalPlaneResolutionUnit 0xA210 /* 0x9210 - - */
#define EXIF_SubjectLocation 0xA214 /* 0x9214 - - */
#define EXIF_ExposureIndex 0xA215 /* 0x9215 - - */
#define EXIF_SensingMethod 0xA217 /* 0x9217 - - */
#define EXIF_FileSource 0xA300
#define EXIF_SceneType 0xA301
#endif /* _gphoto_exif_ */
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