使用libexif为JPEG图片添加EXIF属性(新)

/* exif-tag.c * * Copyright (c) 2001 Lutz Mueller <lutz@users.sourceforge.net> * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, * Boston, MA 02110-1301 USA. */ #include <config.h> #include <libexif/exif-tag.h> #include <libexif/i18n.h> #include <stdlib.h> #include <string.h> #define ESL_NNNN { EXIF_SUPPORT_LEVEL_NOT_RECORDED, EXIF_SUPPORT_LEVEL_NOT_RECORDED, EXIF_SUPPORT_LEVEL_NOT_RECORDED, EXIF_SUPPORT_LEVEL_NOT_RECORDED } #define ESL_OOOO { EXIF_SUPPORT_LEVEL_OPTIONAL, EXIF_SUPPORT_LEVEL_OPTIONAL, EXIF_SUPPORT_LEVEL_OPTIONAL, EXIF_SUPPORT_LEVEL_OPTIONAL } #define ESL_MMMN { EXIF_SUPPORT_LEVEL_MANDATORY, EXIF_SUPPORT_LEVEL_MANDATORY, EXIF_SUPPORT_LEVEL_MANDATORY, EXIF_SUPPORT_LEVEL_NOT_RECORDED } #define ESL_MMMM { EXIF_SUPPORT_LEVEL_MANDATORY, EXIF_SUPPORT_LEVEL_MANDATORY, EXIF_SUPPORT_LEVEL_MANDATORY, EXIF_SUPPORT_LEVEL_MANDATORY } #define ESL_OMON { EXIF_SUPPORT_LEVEL_OPTIONAL, EXIF_SUPPORT_LEVEL_MANDATORY, EXIF_SUPPORT_LEVEL_OPTIONAL, EXIF_SUPPORT_LEVEL_NOT_RECORDED } #define ESL_NNOO { EXIF_SUPPORT_LEVEL_NOT_RECORDED, EXIF_SUPPORT_LEVEL_NOT_RECORDED, EXIF_SUPPORT_LEVEL_OPTIONAL, EXIF_SUPPORT_LEVEL_OPTIONAL } #define ESL_NNMN { EXIF_SUPPORT_LEVEL_NOT_RECORDED, EXIF_SUPPORT_LEVEL_NOT_RECORDED, EXIF_SUPPORT_LEVEL_MANDATORY, EXIF_SUPPORT_LEVEL_NOT_RECORDED } #define ESL_NNMM { EXIF_SUPPORT_LEVEL_NOT_RECORDED, EXIF_SUPPORT_LEVEL_NOT_RECORDED, EXIF_SUPPORT_LEVEL_MANDATORY, EXIF_SUPPORT_LEVEL_MANDATORY } #define ESL_NNNM { EXIF_SUPPORT_LEVEL_NOT_RECORDED, EXIF_SUPPORT_LEVEL_NOT_RECORDED, EXIF_SUPPORT_LEVEL_NOT_RECORDED, EXIF_SUPPORT_LEVEL_MANDATORY } #define ESL_NNNO { EXIF_SUPPORT_LEVEL_NOT_RECORDED, EXIF_SUPPORT_LEVEL_NOT_RECORDED, EXIF_SUPPORT_LEVEL_NOT_RECORDED, EXIF_SUPPORT_LEVEL_OPTIONAL } #define ESL_GPS { ESL_NNNN, ESL_NNNN, ESL_NNNN, ESL_OOOO, ESL_NNNN } /*! * Table giving information about each EXIF tag. * There may be more than one entry with the same tag value because some tags * have different meanings depending on the IFD in which they appear. * When there are such duplicate entries, there must be no overlap in their * support levels. * The entries MUST be sorted in tag order. * The name and title are mandatory, but the description may be an empty * string. None of the entries may be NULL except the final array terminator. */ static const struct TagEntry { /*! Tag ID. There may be duplicate tags when the same number is used for * different meanings in different IFDs. */ ExifTag tag; const char *name; const char *title; const char *description; /*! indexed by the types [ExifIfd][ExifDataType] */ ExifSupportLevel esl[EXIF_IFD_COUNT][EXIF_DATA_TYPE_COUNT]; } ExifTagTable[] = { #ifndef NO_VERBOSE_TAG_STRINGS {EXIF_TAG_GPS_VERSION_ID, "GPSVersionID", N_("GPS Tag Version"), N_("Indicates the version of <GPSInfoIFD>. The version is given " "as 2.0.0.0. This tag is mandatory when <GPSInfo> tag is " "present. (Note: The <GPSVersionID> tag is given in bytes, " "unlike the <ExifVersion> tag. When the version is " "2.0.0.0, the tag value is 02000000.H)."), ESL_GPS}, {EXIF_TAG_INTEROPERABILITY_INDEX, "InteroperabilityIndex", N_("Interoperability Index"), N_("Indicates the identification of the Interoperability rule. " "Use \"R98\" for stating ExifR98 Rules. Four bytes used " "including the termination code (NULL). see the separate " "volume of Recommended Exif Interoperability Rules (ExifR98) " "for other tags used for ExifR98."), { ESL_NNNN, ESL_NNNN, ESL_NNNN, ESL_NNNN, ESL_OOOO } }, {EXIF_TAG_GPS_LATITUDE_REF, "GPSLatitudeRef", N_("North or South Latitude"), N_("Indicates whether the latitude is north or south latitude. The " "ASCII value 'N' indicates north latitude, and 'S' is south " "latitude."), ESL_GPS}, {EXIF_TAG_INTEROPERABILITY_VERSION, "InteroperabilityVersion", N_("Interoperability Version"), "", { ESL_NNNN, ESL_NNNN, ESL_NNNN, ESL_NNNN, ESL_OOOO } }, {EXIF_TAG_GPS_LATITUDE, "GPSLatitude", N_("Latitude"), N_("Indicates the latitude. The latitude is expressed as three " "RATIONAL values giving the degrees, minutes, and seconds, " "respectively. When degrees, minutes and seconds are expressed, " "the format is dd/1,mm/1,ss/1. When degrees and minutes are used " "and, for example, fractions of minutes are given up to two " "decimal places, the format is dd/1,mmmm/100,0/1."), ESL_GPS}, {EXIF_TAG_GPS_LONGITUDE_REF, "GPSLongitudeRef", N_("East or West Longitude"), N_("Indicates whether the longitude is east or west longitude. " "ASCII 'E' indicates east longitude, and 'W' is west " "longitude."), ESL_GPS}, {EXIF_TAG_GPS_LONGITUDE, "GPSLongitude", N_("Longitude"), N_("Indicates the longitude. The longitude is expressed as three " "RATIONAL values giving the degrees, minutes, and seconds, " "respectively. When degrees, minutes and seconds are expressed, " "the format is ddd/1,mm/1,ss/1. When degrees and minutes are " "used and, for example, fractions of minutes are given up to " "two decimal places, the format is ddd/1,mmmm/100,0/1."), ESL_GPS}, {EXIF_TAG_GPS_ALTITUDE_REF, "GPSAltitudeRef", N_("Altitude Reference"), N_("Indicates the altitude used as the reference altitude. If the " "reference is sea level and the altitude is above sea level, 0 " "is given. If the altitude is below sea level, a value of 1 is given " "and the altitude is indicated as an absolute value in the " "GSPAltitude tag. The reference unit is meters. Note that this tag " "is BYTE type, unlike other reference tags."), ESL_GPS}, {EXIF_TAG_GPS_ALTITUDE, "GPSAltitude", N_("Altitude"), N_("Indicates the altitude based on the reference in GPSAltitudeRef. " "Altitude is expressed as one RATIONAL value. The reference unit " "is meters."), ESL_GPS}, {EXIF_TAG_GPS_TIME_STAMP, "GPSTimeStamp", N_("GPS Time (Atomic Clock)"), N_("Indicates the time as UTC (Coordinated Universal Time). " "TimeStamp is expressed as three RATIONAL values giving " "the hour, minute, and second."), ESL_GPS}, {EXIF_TAG_GPS_SATELLITES, "GPSSatellites", N_("GPS Satellites"), N_("Indicates the GPS satellites used for measurements. This " "tag can be used to describe the number of satellites, their ID " "number, angle of elevation, azimuth, SNR and other information " "in ASCII notation. The format is not specified. If the GPS " "receiver is incapable of taking measurements, value of the tag " "shall be set to NULL."), ESL_GPS}, {EXIF_TAG_GPS_STATUS, "GPSStatus", N_("GPS Receiver Status"), N_("Indicates the status of the GPS receiver when the image is " "recorded. 'A' means measurement is in progress, and 'V' means " "the measurement is Interoperability."), ESL_GPS}, {EXIF_TAG_GPS_MEASURE_MODE, "GPSMeasureMode", N_("GPS Measurement Mode"), N_("Indicates the GPS measurement mode. '2' means " "two-dimensional measurement and '3' means three-dimensional " "measurement is in progress."), ESL_GPS}, {EXIF_TAG_GPS_DOP, "GPSDOP", N_("Measurement Precision"), N_("Indicates the GPS DOP (data degree of precision). An HDOP " "value is written during two-dimensional measurement,