libexif/exif-tag.h

   1 /*! \file exif-tag.h
   2  *  \brief Handling EXIF tags
   3  */
   4 /*
   5  * Copyright (c) 2001 Lutz Mueller <lutz@users.sourceforge.net>
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the
  19  * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  20  * Boston, MA  02110-1301  USA.
  21  */
  22
  23 #ifndef __EXIF_TAG_H__
  24 #define __EXIF_TAG_H__
  25
  26 #ifdef __cplusplus
  27 extern "C" {
  28 #endif /* __cplusplus */
  29
  30 #include <libexif/exif-ifd.h>
  31 #include <libexif/exif-data-type.h>
  32
  33 /*! EXIF tags */
  34 typedef enum {
  35         EXIF_TAG_INTEROPERABILITY_INDEX         = 0x0001,
  36         EXIF_TAG_INTEROPERABILITY_VERSION       = 0x0002,
  37         EXIF_TAG_NEW_SUBFILE_TYPE               = 0x00fe,
  38         EXIF_TAG_IMAGE_WIDTH                    = 0x0100,
  39         EXIF_TAG_IMAGE_LENGTH                   = 0x0101,
  40         EXIF_TAG_BITS_PER_SAMPLE                = 0x0102,
  41         EXIF_TAG_COMPRESSION                    = 0x0103,
  42         EXIF_TAG_PHOTOMETRIC_INTERPRETATION     = 0x0106,
  43         EXIF_TAG_FILL_ORDER                     = 0x010a,
  44         EXIF_TAG_DOCUMENT_NAME                  = 0x010d,
  45         EXIF_TAG_IMAGE_DESCRIPTION              = 0x010e,
  46         EXIF_TAG_MAKE                           = 0x010f,
  47         EXIF_TAG_MODEL                          = 0x0110,
  48         EXIF_TAG_STRIP_OFFSETS                  = 0x0111,
  49         EXIF_TAG_ORIENTATION                    = 0x0112,
  50         EXIF_TAG_SAMPLES_PER_PIXEL              = 0x0115,
  51         EXIF_TAG_ROWS_PER_STRIP                 = 0x0116,
  52         EXIF_TAG_STRIP_BYTE_COUNTS              = 0x0117,
  53         EXIF_TAG_X_RESOLUTION                   = 0x011a,
  54         EXIF_TAG_Y_RESOLUTION                   = 0x011b,
  55         EXIF_TAG_PLANAR_CONFIGURATION           = 0x011c,
  56         EXIF_TAG_RESOLUTION_UNIT                = 0x0128,
  57         EXIF_TAG_TRANSFER_FUNCTION              = 0x012d,
  58         EXIF_TAG_SOFTWARE                       = 0x0131,
  59         EXIF_TAG_DATE_TIME                      = 0x0132,
  60         EXIF_TAG_ARTIST                         = 0x013b,
  61         EXIF_TAG_WHITE_POINT                    = 0x013e,
  62         EXIF_TAG_PRIMARY_CHROMATICITIES         = 0x013f,
  63         EXIF_TAG_SUB_IFDS                       = 0x014a,
  64         EXIF_TAG_TRANSFER_RANGE                 = 0x0156,
  65         EXIF_TAG_JPEG_PROC                      = 0x0200,
  66         EXIF_TAG_JPEG_INTERCHANGE_FORMAT        = 0x0201,
  67         EXIF_TAG_JPEG_INTERCHANGE_FORMAT_LENGTH = 0x0202,
  68         EXIF_TAG_YCBCR_COEFFICIENTS             = 0x0211,
  69         EXIF_TAG_YCBCR_SUB_SAMPLING             = 0x0212,
  70         EXIF_TAG_YCBCR_POSITIONING              = 0x0213,
  71         EXIF_TAG_REFERENCE_BLACK_WHITE          = 0x0214,
  72         EXIF_TAG_XML_PACKET                     = 0x02bc,
  73         EXIF_TAG_RELATED_IMAGE_FILE_FORMAT      = 0x1000,
  74         EXIF_TAG_RELATED_IMAGE_WIDTH            = 0x1001,
  75         EXIF_TAG_RELATED_IMAGE_LENGTH           = 0x1002,
  76         EXIF_TAG_CFA_REPEAT_PATTERN_DIM         = 0x828d,
  77         EXIF_TAG_CFA_PATTERN                    = 0x828e,
  78         EXIF_TAG_BATTERY_LEVEL                  = 0x828f,
  79         EXIF_TAG_COPYRIGHT                      = 0x8298,
  80         EXIF_TAG_EXPOSURE_TIME                  = 0x829a,
  81         EXIF_TAG_FNUMBER                        = 0x829d,
  82         EXIF_TAG_IPTC_NAA                       = 0x83bb,
  83         EXIF_TAG_IMAGE_RESOURCES                = 0x8649,
  84         EXIF_TAG_EXIF_IFD_POINTER               = 0x8769,
  85         EXIF_TAG_INTER_COLOR_PROFILE            = 0x8773,
  86         EXIF_TAG_EXPOSURE_PROGRAM               = 0x8822,
  87         EXIF_TAG_SPECTRAL_SENSITIVITY           = 0x8824,
  88         EXIF_TAG_GPS_INFO_IFD_POINTER           = 0x8825,
  89         EXIF_TAG_ISO_SPEED_RATINGS              = 0x8827,
  90         EXIF_TAG_OECF                           = 0x8828,
  91         EXIF_TAG_TIME_ZONE_OFFSET               = 0x882a,
  92         EXIF_TAG_EXIF_VERSION                   = 0x9000,
  93         EXIF_TAG_DATE_TIME_ORIGINAL             = 0x9003,
  94         EXIF_TAG_DATE_TIME_DIGITIZED            = 0x9004,
  95         EXIF_TAG_COMPONENTS_CONFIGURATION       = 0x9101,
  96         EXIF_TAG_COMPRESSED_BITS_PER_PIXEL      = 0x9102,
  97         EXIF_TAG_SHUTTER_SPEED_VALUE            = 0x9201,
  98         EXIF_TAG_APERTURE_VALUE                 = 0x9202,
  99         EXIF_TAG_BRIGHTNESS_VALUE               = 0x9203,
 100         EXIF_TAG_EXPOSURE_BIAS_VALUE            = 0x9204,
 101         EXIF_TAG_MAX_APERTURE_VALUE             = 0x9205,
 102         EXIF_TAG_SUBJECT_DISTANCE               = 0x9206,
 103         EXIF_TAG_METERING_MODE                  = 0x9207,
 104         EXIF_TAG_LIGHT_SOURCE                   = 0x9208,
 105         EXIF_TAG_FLASH                          = 0x9209,
 106         EXIF_TAG_FOCAL_LENGTH                   = 0x920a,
 107         EXIF_TAG_SUBJECT_AREA                   = 0x9214,
 108         EXIF_TAG_TIFF_EP_STANDARD_ID            = 0x9216,
 109         EXIF_TAG_MAKER_NOTE                     = 0x927c,
 110         EXIF_TAG_USER_COMMENT                   = 0x9286,
 111         EXIF_TAG_SUB_SEC_TIME                   = 0x9290,
 112         EXIF_TAG_SUB_SEC_TIME_ORIGINAL          = 0x9291,
 113         EXIF_TAG_SUB_SEC_TIME_DIGITIZED         = 0x9292,
 114         EXIF_TAG_XP_TITLE                       = 0x9c9b,
 115         EXIF_TAG_XP_COMMENT                     = 0x9c9c,
 116         EXIF_TAG_XP_AUTHOR                      = 0x9c9d,
 117         EXIF_TAG_XP_KEYWORDS                    = 0x9c9e,
 118         EXIF_TAG_XP_SUBJECT                     = 0x9c9f,
 119         EXIF_TAG_FLASH_PIX_VERSION              = 0xa000,
 120         EXIF_TAG_COLOR_SPACE                    = 0xa001,
 121         EXIF_TAG_PIXEL_X_DIMENSION              = 0xa002,
 122         EXIF_TAG_PIXEL_Y_DIMENSION              = 0xa003,
 123         EXIF_TAG_RELATED_SOUND_FILE             = 0xa004,
 124         EXIF_TAG_INTEROPERABILITY_IFD_POINTER   = 0xa005,
 125         EXIF_TAG_FLASH_ENERGY                   = 0xa20b,
 126         EXIF_TAG_SPATIAL_FREQUENCY_RESPONSE     = 0xa20c,
 127         EXIF_TAG_FOCAL_PLANE_X_RESOLUTION       = 0xa20e,
 128         EXIF_TAG_FOCAL_PLANE_Y_RESOLUTION       = 0xa20f,
 129         EXIF_TAG_FOCAL_PLANE_RESOLUTION_UNIT    = 0xa210,
 130         EXIF_TAG_SUBJECT_LOCATION               = 0xa214,
 131         EXIF_TAG_EXPOSURE_INDEX                 = 0xa215,
 132         EXIF_TAG_SENSING_METHOD                 = 0xa217,
 133         EXIF_TAG_FILE_SOURCE                    = 0xa300,
 134         EXIF_TAG_SCENE_TYPE                     = 0xa301,
 135         EXIF_TAG_NEW_CFA_PATTERN                = 0xa302,
 136         EXIF_TAG_CUSTOM_RENDERED                = 0xa401,
 137         EXIF_TAG_EXPOSURE_MODE                  = 0xa402,
 138         EXIF_TAG_WHITE_BALANCE                  = 0xa403,
 139         EXIF_TAG_DIGITAL_ZOOM_RATIO             = 0xa404,
 140         EXIF_TAG_FOCAL_LENGTH_IN_35MM_FILM      = 0xa405,
 141         EXIF_TAG_SCENE_CAPTURE_TYPE             = 0xa406,
 142         EXIF_TAG_GAIN_CONTROL                   = 0xa407,
 143         EXIF_TAG_CONTRAST                       = 0xa408,
 144         EXIF_TAG_SATURATION                     = 0xa409,
 145         EXIF_TAG_SHARPNESS                      = 0xa40a,
 146         EXIF_TAG_DEVICE_SETTING_DESCRIPTION     = 0xa40b,
 147         EXIF_TAG_SUBJECT_DISTANCE_RANGE         = 0xa40c,
 148         EXIF_TAG_IMAGE_UNIQUE_ID                = 0xa420,
 149         EXIF_TAG_GAMMA                          = 0xa500,
 150         EXIF_TAG_PRINT_IMAGE_MATCHING           = 0xc4a5,
 151         EXIF_TAG_PADDING                        = 0xea1c
 152 } ExifTag;
 153
 154 /* GPS tags overlap with above ones. */
 155 #define EXIF_TAG_GPS_VERSION_ID        0x0000
 156 #define EXIF_TAG_GPS_LATITUDE_REF      0x0001 /* INTEROPERABILITY_INDEX   */
 157 #define EXIF_TAG_GPS_LATITUDE          0x0002 /* INTEROPERABILITY_VERSION */
 158 #define EXIF_TAG_GPS_LONGITUDE_REF     0x0003
 159 #define EXIF_TAG_GPS_LONGITUDE         0x0004
 160 #define EXIF_TAG_GPS_ALTITUDE_REF      0x0005
 161 #define EXIF_TAG_GPS_ALTITUDE          0x0006
 162 #define EXIF_TAG_GPS_TIME_STAMP        0x0007
 163 #define EXIF_TAG_GPS_SATELLITES        0x0008
 164 #define EXIF_TAG_GPS_STATUS            0x0009
 165 #define EXIF_TAG_GPS_MEASURE_MODE      0x000a
 166 #define EXIF_TAG_GPS_DOP               0x000b
 167 #define EXIF_TAG_GPS_SPEED_REF         0x000c
 168 #define EXIF_TAG_GPS_SPEED             0x000d
 169 #define EXIF_TAG_GPS_TRACK_REF         0x000e
 170 #define EXIF_TAG_GPS_TRACK             0x000f
 171 #define EXIF_TAG_GPS_IMG_DIRECTION_REF 0x0010
 172 #define EXIF_TAG_GPS_IMG_DIRECTION     0x0011
 173 #define EXIF_TAG_GPS_MAP_DATUM         0x0012
 174 #define EXIF_TAG_GPS_DEST_LATITUDE_REF 0x0013
 175 #define EXIF_TAG_GPS_DEST_LATITUDE     0x0014
 176 #define EXIF_TAG_GPS_DEST_LONGITUDE_REF 0x0015
 177 #define EXIF_TAG_GPS_DEST_LONGITUDE     0x0016
 178 #define EXIF_TAG_GPS_DEST_BEARING_REF   0x0017
 179 #define EXIF_TAG_GPS_DEST_BEARING       0x0018
 180 #define EXIF_TAG_GPS_DEST_DISTANCE_REF  0x0019
 181 #define EXIF_TAG_GPS_DEST_DISTANCE      0x001a
 182 #define EXIF_TAG_GPS_PROCESSING_METHOD  0x001b
 183 #define EXIF_TAG_GPS_AREA_INFORMATION   0x001c
 184 #define EXIF_TAG_GPS_DATE_STAMP         0x001d
 185 #define EXIF_TAG_GPS_DIFFERENTIAL       0x001e
 186 #define EXIF_TAG_GPS_H_POSITIONING_ERROR 0x001f
 187
 188 /*! What level of support a tag enjoys in the EXIF standard */
 189 typedef enum {
 190         /*! The meaning of this tag is unknown */
 191         EXIF_SUPPORT_LEVEL_UNKNOWN = 0,
 192
 193         /*! This tag is not allowed in the given IFD */
 194         EXIF_SUPPORT_LEVEL_NOT_RECORDED,
 195
 196         /*! This tag is mandatory in the given IFD */
 197         EXIF_SUPPORT_LEVEL_MANDATORY,
 198
 199         /*! This tag is optional in the given IFD */
 200         EXIF_SUPPORT_LEVEL_OPTIONAL
 201 } ExifSupportLevel;
 202
 203 /*! Return the tag ID given its unique textual name.
 204  *
 205  * \param[in] name tag name
 206  * \return tag ID, or 0 if tag not found
 207  * \note The tag not found value cannot be distinguished from a legitimate
 208  *   tag number 0.
 209  */
 210 ExifTag          exif_tag_from_name                (const char *name);
 211
 212 /*! Return a textual name of the given tag when found in the given IFD. The
 213  * name is a short, unique, non-localized text string containing only
 214  * US-ASCII alphanumeric characters.
 215  *
 216  * \param[in] tag EXIF tag
 217  * \param[in] ifd IFD
 218  * \return textual name of the tag, or NULL if the tag is unknown
 219  */
 220 const char      *exif_tag_get_name_in_ifd          (ExifTag tag, ExifIfd ifd);
 221
 222 /*! Return a textual title of the given tag when found in the given IFD.
 223  * The title is a short, localized description of the tag.
 224  *
 225  * \param[in] tag EXIF tag
 226  * \param[in] ifd IFD
 227  * \return textual title of the tag, or NULL if the tag is unknown
 228  */
 229 const char      *exif_tag_get_title_in_ifd         (ExifTag tag, ExifIfd ifd);
 230
 231 /*! Return a verbose textual description of the given tag when found in the
 232  * given IFD. The description is a verbose, localized description of the tag.
 233  *
 234  * \param[in] tag EXIF tag
 235  * \param[in] ifd IFD
 236  * \return textual description of the tag, or NULL if the tag is unknown
 237  */
 238 const char      *exif_tag_get_description_in_ifd   (ExifTag tag, ExifIfd ifd);
 239
 240 /*! Return whether the given tag is mandatory or not in the given IFD and
 241  * data type according to the EXIF specification. If the IFD given is
 242  * EXIF_IFD_COUNT, the result is EXIF_SUPPORT_LEVEL_UNKNOWN. If the data
 243  * type is EXIF_DATA_TYPE_UNKNOWN, the result is
 244  * EXIF_SUPPORT_LEVEL_UNKNOWN unless the support level is the same for
 245  * all data types.
 246  *
 247  * \param[in] tag EXIF tag
 248  * \param[in] ifd IFD or EXIF_IFD_COUNT
 249  * \param[in] t data type or EXIF_DATA_TYPE_UNKNOWN
 250  * \return the level of support for this tag
 251  */
 252 ExifSupportLevel exif_tag_get_support_level_in_ifd (ExifTag tag, ExifIfd ifd,
 253                                                     ExifDataType t);
 254
 255 /* Don't use these functions. They are here for compatibility only. */
 256
 257 /*! \deprecated Use #exif_tag_get_name_in_ifd instead */
 258 const char     *exif_tag_get_name        (ExifTag tag);
 259
 260 /*! \deprecated Use #exif_tag_get_title_in_ifd instead */
 261 const char     *exif_tag_get_title       (ExifTag tag);
 262
 263 /*! \deprecated Use #exif_tag_get_description_in_ifd instead */
 264 const char     *exif_tag_get_description (ExifTag tag);
 265
 266
 267 /* For now, do not use these functions. */
 268
 269 /*! \internal */
 270 ExifTag      exif_tag_table_get_tag  (unsigned int n);
 271
 272 /*! \internal */
 273 const char  *exif_tag_table_get_name (unsigned int n);
 274
 275 /*! \internal */
 276 unsigned int exif_tag_table_count    (void);
 277
 278
 279 /* Don't use these definitions. They are here for compatibility only. */
 280
 281 /*! \deprecated Use EXIF_TAG_PRINT_IMAGE_MATCHING instead. */
 282 #define EXIF_TAG_UNKNOWN_C4A5 EXIF_TAG_PRINT_IMAGE_MATCHING
 283
 284 #ifdef __cplusplus
 285 }
 286 #endif /* __cplusplus */
 287
 288 #endif /* __EXIF_TAG_H__ */