1 //-------------------------------------------------------------------------- 2 // Include file for jhead program. 3 // 4 // This include file only defines stuff that goes across modules. 5 // I like to keep the definitions for macros and structures as close to 6 // where they get used as possible, so include files only get stuff that 7 // gets used in more than one file. 8 //-------------------------------------------------------------------------- 9 #define _CRT_SECURE_NO_DEPRECATE 1 10 11 #include <stdio.h> 12 #include <stdlib.h> 13 #include <string.h> 14 #include <time.h> 15 #include <errno.h> 16 #include <ctype.h> 17 #include <stdint.h> 18 19 //-------------------------------------------------------------------------- 20 21 #ifdef _WIN32 22 #include <sys/utime.h> 23 #else 24 #include <utime.h> 25 #include <sys/types.h> 26 #include <unistd.h> 27 #include <errno.h> 28 #include <limits.h> 29 #endif 30 31 32 typedef unsigned char uchar; 33 34 #ifndef TRUE 35 #define TRUE 1 36 #define FALSE 0 37 #endif 38 39 #define MAX_COMMENT_SIZE 2000 40 #define GPS_PROCESSING_METHOD_LEN 100 41 42 #ifdef _WIN32 43 #define PATH_MAX _MAX_PATH 44 #define SLASH '\\' 45 #else 46 #define SLASH '/' 47 #endif 48 49 50 //-------------------------------------------------------------------------- 51 // This structure is used to store jpeg file sections in memory. 52 typedef struct { 53 uchar * Data; 54 int Type; 55 unsigned Offset; 56 unsigned Size; 57 }Section_t; 58 59 extern int ExifSectionIndex; 60 61 extern int DumpExifMap; 62 63 #define MAX_DATE_COPIES 10 64 65 // Buffer size must large enough to hold maximum location string 66 // containing six signed integers plus delimeters and terminator, 67 // i.e.: 11 * 6 + 3(‘/’) + 2(’,’) + 1(\0) = 72 68 #define MAX_BUF_SIZE 72 69 70 // Sub second tag string length (including null termination character), with 71 // nano-second precision. e.g. 0.123456789s is represented as a null terminated 72 // string "123456789". Although it can be any length, it is limited to 9 digits 73 // here as we limit the precision to nano-second. 74 #define SUB_SEC_SIZE 10 75 76 typedef struct { 77 uint32_t num; 78 uint32_t denom; 79 } rat_t; 80 81 //-------------------------------------------------------------------------- 82 // This structure stores Exif header image elements in a simple manner 83 // Used to store camera data as extracted from the various ways that it can be 84 // stored in an exif header 85 typedef struct { 86 char FileName [PATH_MAX+1]; 87 time_t FileDateTime; 88 unsigned FileSize; 89 char CameraMake [32]; 90 char CameraModel [40]; 91 char DateTime [20]; 92 char DigitizedTime[20]; 93 // Fractions of seconds for DateTime tag, with milisecond precision. 94 char SubSecTime[SUB_SEC_SIZE]; 95 // Fractions of seconds for DateTimeOriginal tag, with milisecond precision. 96 char SubSecTimeOrig[SUB_SEC_SIZE]; 97 // Fractions of seconds for DateTimeDigitized tag, with milisecond precision. 98 char SubSecTimeDig[SUB_SEC_SIZE]; 99 int Height, Width; 100 int Orientation; 101 int IsColor; 102 int Process; 103 int FlashUsed; 104 rat_t FocalLength; 105 float ExposureTime; 106 float ApertureFNumber; 107 float Distance; 108 float CCDWidth; 109 float ExposureBias; 110 float DigitalZoomRatio; 111 int FocalLength35mmEquiv; // Exif 2.2 tag - usually not present. 112 int Whitebalance; 113 int MeteringMode; 114 int ExposureProgram; 115 int ExposureMode; 116 int ISOequivalent; 117 int LightSource; 118 int DistanceRange; 119 120 char Comments[MAX_COMMENT_SIZE]; 121 int CommentWidchars; // If nonzer, widechar comment, indicates number of chars. 122 123 unsigned ThumbnailOffset; // Exif offset to thumbnail 124 unsigned ThumbnailSize; // Size of thumbnail. 125 unsigned LargestExifOffset; // Last exif data referenced (to check if thumbnail is at end) 126 127 char ThumbnailAtEnd; // Exif header ends with the thumbnail 128 // (we can only modify the thumbnail if its at the end) 129 int ThumbnailSizeOffset; 130 131 int DateTimeOffsets[MAX_DATE_COPIES]; 132 int numDateTimeTags; 133 134 int GpsInfoPresent; 135 char GpsLat[31]; 136 char GpsLatRaw[MAX_BUF_SIZE]; 137 char GpsLatRef[2]; 138 char GpsLong[31]; 139 char GpsLongRaw[MAX_BUF_SIZE]; 140 char GpsLongRef[2]; 141 char GpsAlt[20]; 142 rat_t GpsAltRaw; 143 char GpsAltRef; 144 // gps-datestamp is 11 bytes ascii in EXIF 2.2 145 char GpsDateStamp[11]; 146 char GpsTimeStamp[11]; 147 char GpsProcessingMethod[GPS_PROCESSING_METHOD_LEN + 1]; 148 }ImageInfo_t; 149 150 151 152 #define EXIT_FAILURE 1 153 #define EXIT_SUCCESS 0 154 155 // jpgfile.c functions 156 typedef enum { 157 READ_METADATA = 1, 158 READ_IMAGE = 2, 159 READ_ALL = 3 160 }ReadMode_t; 161 162 163 typedef struct { 164 unsigned short Tag; // tag value, i.e. TAG_MODEL 165 int Format; // format of data 166 char* Value; // value of data in string format 167 int DataLength; // length of string when format says Value is a string 168 int GpsTag; // bool - the tag is related to GPS info 169 } ExifElement_t; 170 171 172 typedef struct { 173 unsigned short Tag; 174 char * Desc; 175 int Format; 176 int DataLength; // Number of elements in Format. -1 means any length. 177 } TagTable_t; 178 179 180 // prototypes for jhead.c functions 181 void ErrFatal(char * msg); 182 void ErrNonfatal(char * msg, int a1, int a2); 183 void FileTimeAsString(char * TimeStr); 184 185 // Prototypes for exif.c functions. 186 int Exif2tm(struct tm * timeptr, char * ExifTime); 187 void process_EXIF (unsigned char * CharBuf, unsigned int length); 188 int RemoveThumbnail(unsigned char * ExifSection); 189 void ShowImageInfo(int ShowFileInfo); 190 void ShowConciseImageInfo(void); 191 const char * ClearOrientation(void); 192 void PrintFormatNumber(void * ValuePtr, int Format, int ByteCount); 193 double ConvertAnyFormat(void * ValuePtr, int Format); 194 int Get16u(void * Short); 195 unsigned Get32u(void * Long); 196 int Get32s(void * Long); 197 void Put32u(void * Value, unsigned PutValue); 198 void create_EXIF(ExifElement_t* elements, int exifTagCount, int gpsTagCount, int hasDateTimeTag); 199 int TagNameToValue(const char* tagName); 200 int IsDateTimeTag(unsigned short tag); 201 202 //-------------------------------------------------------------------------- 203 // Exif format descriptor stuff 204 extern const int BytesPerFormat[]; 205 #define NUM_FORMATS 12 206 207 #define FMT_BYTE 1 208 #define FMT_STRING 2 209 #define FMT_USHORT 3 210 #define FMT_ULONG 4 211 #define FMT_URATIONAL 5 212 #define FMT_SBYTE 6 213 #define FMT_UNDEFINED 7 214 #define FMT_SSHORT 8 215 #define FMT_SLONG 9 216 #define FMT_SRATIONAL 10 217 #define FMT_SINGLE 11 218 #define FMT_DOUBLE 12 219 220 221 // makernote.c prototypes 222 extern void ProcessMakerNote(unsigned char * DirStart, int ByteCount, 223 unsigned char * OffsetBase, unsigned ExifLength); 224 225 // gpsinfo.c prototypes 226 void ProcessGpsInfo(unsigned char * ValuePtr, int ByteCount, 227 unsigned char * OffsetBase, unsigned ExifLength); 228 int IsGpsTag(const char* tag); 229 int GpsTagToFormatType(unsigned short tag); 230 int GpsTagNameToValue(const char* tagName); 231 TagTable_t* GpsTagToTagTableEntry(unsigned short tag); 232 static const char ExifAsciiPrefix[] = { 0x41, 0x53, 0x43, 0x49, 0x49, 0x0, 0x0, 0x0 }; 233 234 // iptc.c prototpyes 235 void show_IPTC (unsigned char * CharBuf, unsigned int length); 236 void ShowXmp(Section_t XmpSection); 237 238 // Prototypes for myglob.c module 239 #ifdef _WIN32 240 void MyGlob(const char * Pattern , void (*FileFuncParm)(const char * FileName)); 241 void SlashToNative(char * Path); 242 #endif 243 244 // Prototypes for paths.c module 245 int EnsurePathExists(const char * FileName); 246 void CatPath(char * BasePath, const char * FilePath); 247 248 // Prototypes from jpgfile.c 249 int ReadJpegSections (FILE * infile, ReadMode_t ReadMode); 250 void DiscardData(void); 251 void DiscardAllButExif(void); 252 int ReadJpegFile(const char * FileName, ReadMode_t ReadMode); 253 int ReplaceThumbnail(const char * ThumbFileName); 254 int ReplaceThumbnailFromBuffer(const char* Thumb, int ThumbLen); 255 int SaveThumbnail(char * ThumbFileName); 256 int RemoveSectionType(int SectionType); 257 int RemoveUnknownSections(void); 258 int WriteJpegFile(const char * FileName); 259 Section_t * FindSection(int SectionType); 260 Section_t * CreateSection(int SectionType, unsigned char * Data, int size); 261 void ResetJpgfile(void); 262 int ReadJpegSectionsFromBuffer (unsigned char* buffer, unsigned int buffer_size, ReadMode_t ReadMode); 263 int WriteJpegToBuffer(unsigned char* buffer, unsigned int buffer_size); 264 265 // Variables from jhead.c used by exif.c 266 extern ImageInfo_t ImageInfo; 267 extern int ShowTags; 268 extern char* formatStr(int format); 269 270 //-------------------------------------------------------------------------- 271 // JPEG markers consist of one or more 0xFF bytes, followed by a marker 272 // code byte (which is not an FF). Here are the marker codes of interest 273 // in this program. (See jdmarker.c for a more complete list.) 274 //-------------------------------------------------------------------------- 275 276 #define M_SOF0 0xC0 // Start Of Frame N 277 #define M_SOF1 0xC1 // N indicates which compression process 278 #define M_SOF2 0xC2 // Only SOF0-SOF2 are now in common use 279 #define M_SOF3 0xC3 280 #define M_SOF5 0xC5 // NB: codes C4 and CC are NOT SOF markers 281 #define M_SOF6 0xC6 282 #define M_SOF7 0xC7 283 #define M_SOF9 0xC9 284 #define M_SOF10 0xCA 285 #define M_SOF11 0xCB 286 #define M_SOF13 0xCD 287 #define M_SOF14 0xCE 288 #define M_SOF15 0xCF 289 #define M_SOI 0xD8 // Start Of Image (beginning of datastream) 290 #define M_EOI 0xD9 // End Of Image (end of datastream) 291 #define M_SOS 0xDA // Start Of Scan (begins compressed data) 292 #define M_JFIF 0xE0 // Jfif marker 293 #define M_EXIF 0xE1 // Exif marker. Also used for XMP data! 294 #define M_XMP 0x10E1 // Not a real tag (same value in file as Exif!) 295 #define M_COM 0xFE // COMment 296 #define M_DQT 0xDB 297 #define M_DHT 0xC4 298 #define M_DRI 0xDD 299 #define M_IPTC 0xED // IPTC marker 300