1 //-------------------------------------------------------------------------- 2 // Program to pull the information out of various types of EXIF digital 3 // camera files and show it in a reasonably consistent way 4 // 5 // This module parses the very complicated exif structures. 6 // 7 // Matthias Wandel 8 //-------------------------------------------------------------------------- 9 #include "jhead.h" 10 11 #include <math.h> 12 #include <ctype.h> 13 #include <utils/Log.h> 14 15 static unsigned char * DirWithThumbnailPtrs; 16 static double FocalplaneXRes; 17 static double FocalplaneUnits; 18 static int ExifImageWidth; 19 static int MotorolaOrder = 0; 20 21 // for fixing the rotation. 22 static void * OrientationPtr[2]; 23 static int OrientationNumFormat[2]; 24 int NumOrientations = 0; 25 26 27 // Define the line below to turn on poor man's debugging output 28 #undef SUPERDEBUG 29 30 #ifdef SUPERDEBUG 31 #define printf ALOGE 32 #endif 33 34 //-------------------------------------------------------------------------- 35 // Table of Jpeg encoding process names 36 static const TagTable_t ProcessTable[] = { 37 { M_SOF0, "Baseline", 0, 0}, 38 { M_SOF1, "Extended sequential", 0, 0}, 39 { M_SOF2, "Progressive", 0, 0}, 40 { M_SOF3, "Lossless", 0, 0}, 41 { M_SOF5, "Differential sequential", 0, 0}, 42 { M_SOF6, "Differential progressive", 0, 0}, 43 { M_SOF7, "Differential lossless", 0, 0}, 44 { M_SOF9, "Extended sequential, arithmetic coding", 0, 0}, 45 { M_SOF10, "Progressive, arithmetic coding", 0, 0}, 46 { M_SOF11, "Lossless, arithmetic coding", 0, 0}, 47 { M_SOF13, "Differential sequential, arithmetic coding", 0, 0}, 48 { M_SOF14, "Differential progressive, arithmetic coding", 0, 0}, 49 { M_SOF15, "Differential lossless, arithmetic coding", 0, 0}, 50 }; 51 52 #define PROCESS_TABLE_SIZE (sizeof(ProcessTable) / sizeof(TagTable_t)) 53 54 // 1 - "The 0th row is at the visual top of the image, and the 0th column is the visual left-hand side." 55 // 2 - "The 0th row is at the visual top of the image, and the 0th column is the visual right-hand side." 56 // 3 - "The 0th row is at the visual bottom of the image, and the 0th column is the visual right-hand side." 57 // 4 - "The 0th row is at the visual bottom of the image, and the 0th column is the visual left-hand side." 58 59 // 5 - "The 0th row is the visual left-hand side of of the image, and the 0th column is the visual top." 60 // 6 - "The 0th row is the visual right-hand side of of the image, and the 0th column is the visual top." 61 // 7 - "The 0th row is the visual right-hand side of of the image, and the 0th column is the visual bottom." 62 // 8 - "The 0th row is the visual left-hand side of of the image, and the 0th column is the visual bottom." 63 64 // Note: The descriptions here are the same as the name of the command line 65 // option to pass to jpegtran to right the image 66 67 static const char * OrientTab[9] = { 68 "Undefined", 69 "Normal", // 1 70 "flip horizontal", // left right reversed mirror 71 "rotate 180", // 3 72 "flip vertical", // upside down mirror 73 "transpose", // Flipped about top-left <--> bottom-right axis. 74 "rotate 90", // rotate 90 cw to right it. 75 "transverse", // flipped about top-right <--> bottom-left axis 76 "rotate 270", // rotate 270 to right it. 77 }; 78 79 const int BytesPerFormat[] = {0,1,1,2,4,8,1,1,2,4,8,4,8}; 80 81 //-------------------------------------------------------------------------- 82 // Describes tag values 83 84 #define TAG_INTEROP_INDEX 0x0001 85 #define TAG_INTEROP_VERSION 0x0002 86 #define TAG_IMAGE_WIDTH 0x0100 87 #define TAG_IMAGE_LENGTH 0x0101 88 #define TAG_BITS_PER_SAMPLE 0x0102 89 #define TAG_COMPRESSION 0x0103 90 #define TAG_PHOTOMETRIC_INTERP 0x0106 91 #define TAG_FILL_ORDER 0x010A 92 #define TAG_DOCUMENT_NAME 0x010D 93 #define TAG_IMAGE_DESCRIPTION 0x010E 94 #define TAG_MAKE 0x010F 95 #define TAG_MODEL 0x0110 96 #define TAG_SRIP_OFFSET 0x0111 97 #define TAG_ORIENTATION 0x0112 98 #define TAG_SAMPLES_PER_PIXEL 0x0115 99 #define TAG_ROWS_PER_STRIP 0x0116 100 #define TAG_STRIP_BYTE_COUNTS 0x0117 101 #define TAG_X_RESOLUTION 0x011A 102 #define TAG_Y_RESOLUTION 0x011B 103 #define TAG_PLANAR_CONFIGURATION 0x011C 104 #define TAG_RESOLUTION_UNIT 0x0128 105 #define TAG_TRANSFER_FUNCTION 0x012D 106 #define TAG_SOFTWARE 0x0131 107 #define TAG_DATETIME 0x0132 108 #define TAG_ARTIST 0x013B 109 #define TAG_WHITE_POINT 0x013E 110 #define TAG_PRIMARY_CHROMATICITIES 0x013F 111 #define TAG_TRANSFER_RANGE 0x0156 112 #define TAG_JPEG_PROC 0x0200 113 #define TAG_THUMBNAIL_OFFSET 0x0201 114 #define TAG_THUMBNAIL_LENGTH 0x0202 115 #define TAG_Y_CB_CR_COEFFICIENTS 0x0211 116 #define TAG_Y_CB_CR_SUB_SAMPLING 0x0212 117 #define TAG_Y_CB_CR_POSITIONING 0x0213 118 #define TAG_REFERENCE_BLACK_WHITE 0x0214 119 #define TAG_RELATED_IMAGE_WIDTH 0x1001 120 #define TAG_RELATED_IMAGE_LENGTH 0x1002 121 #define TAG_CFA_REPEAT_PATTERN_DIM 0x828D 122 #define TAG_CFA_PATTERN1 0x828E 123 #define TAG_BATTERY_LEVEL 0x828F 124 #define TAG_COPYRIGHT 0x8298 125 #define TAG_EXPOSURETIME 0x829A 126 #define TAG_FNUMBER 0x829D 127 #define TAG_IPTC_NAA 0x83BB 128 #define TAG_EXIF_OFFSET 0x8769 129 #define TAG_INTER_COLOR_PROFILE 0x8773 130 #define TAG_EXPOSURE_PROGRAM 0x8822 131 #define TAG_SPECTRAL_SENSITIVITY 0x8824 132 #define TAG_GPSINFO 0x8825 133 #define TAG_ISO_EQUIVALENT 0x8827 134 #define TAG_OECF 0x8828 135 #define TAG_EXIF_VERSION 0x9000 136 #define TAG_DATETIME_ORIGINAL 0x9003 137 #define TAG_DATETIME_DIGITIZED 0x9004 138 #define TAG_COMPONENTS_CONFIG 0x9101 139 #define TAG_CPRS_BITS_PER_PIXEL 0x9102 140 #define TAG_SHUTTERSPEED 0x9201 141 #define TAG_APERTURE 0x9202 142 #define TAG_BRIGHTNESS_VALUE 0x9203 143 #define TAG_EXPOSURE_BIAS 0x9204 144 #define TAG_MAXAPERTURE 0x9205 145 #define TAG_SUBJECT_DISTANCE 0x9206 146 #define TAG_METERING_MODE 0x9207 147 #define TAG_LIGHT_SOURCE 0x9208 148 #define TAG_FLASH 0x9209 149 #define TAG_FOCALLENGTH 0x920A 150 #define TAG_MAKER_NOTE 0x927C 151 #define TAG_USERCOMMENT 0x9286 152 #define TAG_SUBSEC_TIME 0x9290 153 #define TAG_SUBSEC_TIME_ORIG 0x9291 154 #define TAG_SUBSEC_TIME_DIG 0x9292 155 156 #define TAG_WINXP_TITLE 0x9c9b // Windows XP - not part of exif standard. 157 #define TAG_WINXP_COMMENT 0x9c9c // Windows XP - not part of exif standard. 158 #define TAG_WINXP_AUTHOR 0x9c9d // Windows XP - not part of exif standard. 159 #define TAG_WINXP_KEYWORDS 0x9c9e // Windows XP - not part of exif standard. 160 #define TAG_WINXP_SUBJECT 0x9c9f // Windows XP - not part of exif standard. 161 162 #define TAG_FLASH_PIX_VERSION 0xA000 163 #define TAG_COLOR_SPACE 0xA001 164 #define TAG_EXIF_IMAGEWIDTH 0xA002 165 #define TAG_EXIF_IMAGELENGTH 0xA003 166 #define TAG_RELATED_AUDIO_FILE 0xA004 167 #define TAG_INTEROP_OFFSET 0xA005 168 #define TAG_FLASH_ENERGY 0xA20B 169 #define TAG_SPATIAL_FREQ_RESP 0xA20C 170 #define TAG_FOCAL_PLANE_XRES 0xA20E 171 #define TAG_FOCAL_PLANE_YRES 0xA20F 172 #define TAG_FOCAL_PLANE_UNITS 0xA210 173 #define TAG_SUBJECT_LOCATION 0xA214 174 #define TAG_EXPOSURE_INDEX 0xA215 175 #define TAG_SENSING_METHOD 0xA217 176 #define TAG_FILE_SOURCE 0xA300 177 #define TAG_SCENE_TYPE 0xA301 178 #define TAG_CFA_PATTERN 0xA302 179 #define TAG_CUSTOM_RENDERED 0xA401 180 #define TAG_EXPOSURE_MODE 0xA402 181 #define TAG_WHITEBALANCE 0xA403 182 #define TAG_DIGITALZOOMRATIO 0xA404 183 #define TAG_FOCALLENGTH_35MM 0xA405 184 #define TAG_SCENE_CAPTURE_TYPE 0xA406 185 #define TAG_GAIN_CONTROL 0xA407 186 #define TAG_CONTRAST 0xA408 187 #define TAG_SATURATION 0xA409 188 #define TAG_SHARPNESS 0xA40A 189 #define TAG_DISTANCE_RANGE 0xA40C 190 191 // TODO: replace the ", 0" values in this table with the correct format, e.g. ", FMT_USHORT" 192 static const TagTable_t TagTable[] = { 193 { TAG_INTEROP_INDEX, "InteropIndex", 0, 0}, 194 { TAG_INTEROP_VERSION, "InteropVersion", 0, 0}, 195 { TAG_IMAGE_WIDTH, "ImageWidth", FMT_USHORT, 1}, 196 { TAG_IMAGE_LENGTH, "ImageLength", FMT_USHORT, 1}, 197 { TAG_BITS_PER_SAMPLE, "BitsPerSample", FMT_USHORT, 3}, 198 { TAG_COMPRESSION, "Compression", FMT_USHORT, 1}, 199 { TAG_PHOTOMETRIC_INTERP, "PhotometricInterpretation", FMT_USHORT, 1}, 200 { TAG_FILL_ORDER, "FillOrder", 0, 0}, 201 { TAG_DOCUMENT_NAME, "DocumentName", 0, 0}, 202 { TAG_IMAGE_DESCRIPTION, "ImageDescription", 0, 0 }, 203 { TAG_MAKE, "Make", FMT_STRING, -1}, 204 { TAG_MODEL, "Model", FMT_STRING, -1}, 205 { TAG_SRIP_OFFSET, "StripOffsets", FMT_USHORT, 1}, 206 { TAG_ORIENTATION, "Orientation", FMT_USHORT, 1}, 207 { TAG_SAMPLES_PER_PIXEL, "SamplesPerPixel", FMT_USHORT, 3}, 208 { TAG_ROWS_PER_STRIP, "RowsPerStrip", FMT_USHORT, 1}, 209 { TAG_STRIP_BYTE_COUNTS, "StripByteCounts", FMT_USHORT, 1}, 210 { TAG_X_RESOLUTION, "XResolution", FMT_URATIONAL, 1}, 211 { TAG_Y_RESOLUTION, "YResolution", FMT_URATIONAL, 1}, 212 { TAG_PLANAR_CONFIGURATION, "PlanarConfiguration", FMT_USHORT, 1}, 213 { TAG_RESOLUTION_UNIT, "ResolutionUnit", FMT_USHORT, 1}, 214 { TAG_TRANSFER_FUNCTION, "TransferFunction", FMT_USHORT, 768}, 215 { TAG_SOFTWARE, "Software", FMT_STRING, -1}, 216 { TAG_DATETIME, "DateTime", FMT_STRING, 20}, 217 { TAG_ARTIST, "Artist", FMT_STRING, -1}, 218 { TAG_WHITE_POINT, "WhitePoint", FMT_SRATIONAL, 2}, 219 { TAG_PRIMARY_CHROMATICITIES, "PrimaryChromaticities", FMT_SRATIONAL, 6}, 220 { TAG_TRANSFER_RANGE, "TransferRange", 0, 0}, 221 { TAG_JPEG_PROC, "JPEGProc", 0, 0}, 222 { TAG_THUMBNAIL_OFFSET, "ThumbnailOffset", 0, 0}, 223 { TAG_THUMBNAIL_LENGTH, "ThumbnailLength", 0, 0}, 224 { TAG_Y_CB_CR_COEFFICIENTS, "YCbCrCoefficients", FMT_SRATIONAL, 3}, 225 { TAG_Y_CB_CR_SUB_SAMPLING, "YCbCrSubSampling", FMT_USHORT, 2}, 226 { TAG_Y_CB_CR_POSITIONING, "YCbCrPositioning", FMT_USHORT, 1}, 227 { TAG_REFERENCE_BLACK_WHITE, "ReferenceBlackWhite", FMT_SRATIONAL, 6}, 228 { TAG_RELATED_IMAGE_WIDTH, "RelatedImageWidth", 0, 0}, 229 { TAG_RELATED_IMAGE_LENGTH, "RelatedImageLength", 0, 0}, 230 { TAG_CFA_REPEAT_PATTERN_DIM, "CFARepeatPatternDim", 0, 0}, 231 { TAG_CFA_PATTERN1, "CFAPattern", 0, 0}, 232 { TAG_BATTERY_LEVEL, "BatteryLevel", 0, 0}, 233 { TAG_COPYRIGHT, "Copyright", FMT_STRING, -1}, 234 { TAG_EXPOSURETIME, "ExposureTime", FMT_SRATIONAL, 1}, 235 { TAG_FNUMBER, "FNumber", FMT_SRATIONAL, 1}, 236 { TAG_IPTC_NAA, "IPTC/NAA", 0, 0}, 237 { TAG_EXIF_OFFSET, "ExifOffset", 0, 0}, 238 { TAG_INTER_COLOR_PROFILE, "InterColorProfile", 0, 0}, 239 { TAG_EXPOSURE_PROGRAM, "ExposureProgram", FMT_SSHORT, 1}, 240 { TAG_SPECTRAL_SENSITIVITY, "SpectralSensitivity", FMT_STRING, -1}, 241 { TAG_GPSINFO, "GPS Dir offset", 0, 0}, 242 { TAG_ISO_EQUIVALENT, "ISOSpeedRatings", FMT_SSHORT, -1}, 243 { TAG_OECF, "OECF", 0, 0}, 244 { TAG_EXIF_VERSION, "ExifVersion", FMT_BYTE, 4}, 245 { TAG_DATETIME_ORIGINAL, "DateTimeOriginal", FMT_STRING, 20}, 246 { TAG_DATETIME_DIGITIZED, "DateTimeDigitized", FMT_STRING, 20}, 247 { TAG_COMPONENTS_CONFIG, "ComponentsConfiguration", FMT_BYTE, 4}, 248 { TAG_CPRS_BITS_PER_PIXEL, "CompressedBitsPerPixel", FMT_SRATIONAL, 1}, 249 { TAG_SHUTTERSPEED, "ShutterSpeedValue", FMT_SRATIONAL, 1}, 250 { TAG_APERTURE, "ApertureValue", FMT_URATIONAL, 1}, 251 { TAG_BRIGHTNESS_VALUE, "BrightnessValue", FMT_SRATIONAL, 1}, 252 { TAG_EXPOSURE_BIAS, "ExposureBiasValue", FMT_SRATIONAL, 1}, 253 { TAG_MAXAPERTURE, "MaxApertureValue", FMT_URATIONAL, 1}, 254 { TAG_SUBJECT_DISTANCE, "SubjectDistance", FMT_URATIONAL, 1}, 255 { TAG_METERING_MODE, "MeteringMode", FMT_USHORT, 1}, 256 { TAG_LIGHT_SOURCE, "LightSource", FMT_USHORT, 1}, 257 { TAG_FLASH, "Flash", FMT_USHORT, 1}, 258 { TAG_FOCALLENGTH, "FocalLength", FMT_URATIONAL, 1}, 259 { TAG_MAKER_NOTE, "MakerNote", FMT_STRING, -1}, 260 { TAG_USERCOMMENT, "UserComment", FMT_STRING, -1}, 261 { TAG_SUBSEC_TIME, "SubSecTime", FMT_STRING, -1}, 262 { TAG_SUBSEC_TIME_ORIG, "SubSecTimeOriginal", FMT_STRING, -1}, 263 { TAG_SUBSEC_TIME_DIG, "SubSecTimeDigitized", FMT_STRING, -1}, 264 { TAG_WINXP_TITLE, "Windows-XP Title", 0, 0}, 265 { TAG_WINXP_COMMENT, "Windows-XP comment", 0, 0}, 266 { TAG_WINXP_AUTHOR, "Windows-XP author", 0, 0}, 267 { TAG_WINXP_KEYWORDS, "Windows-XP keywords", 0, 0}, 268 { TAG_WINXP_SUBJECT, "Windows-XP subject", 0, 0}, 269 { TAG_FLASH_PIX_VERSION, "FlashPixVersion", FMT_BYTE, 4}, 270 { TAG_COLOR_SPACE, "ColorSpace", FMT_USHORT, 1}, 271 { TAG_EXIF_IMAGEWIDTH, "ExifImageWidth", 0, 0}, 272 { TAG_EXIF_IMAGELENGTH, "ExifImageLength", 0, 0}, 273 { TAG_RELATED_AUDIO_FILE, "RelatedAudioFile", 0, 0}, 274 { TAG_INTEROP_OFFSET, "InteroperabilityOffset", 0, 0}, 275 { TAG_FLASH_ENERGY, "FlashEnergy", FMT_URATIONAL, 1}, 276 { TAG_SPATIAL_FREQ_RESP, "SpatialFrequencyResponse", FMT_STRING, -1}, 277 { TAG_FOCAL_PLANE_XRES, "FocalPlaneXResolution", FMT_URATIONAL, 1}, 278 { TAG_FOCAL_PLANE_YRES, "FocalPlaneYResolution", FMT_URATIONAL, 1}, 279 { TAG_FOCAL_PLANE_UNITS, "FocalPlaneResolutionUnit", FMT_USHORT, 1}, 280 { TAG_SUBJECT_LOCATION, "SubjectLocation", FMT_USHORT, 2}, 281 { TAG_EXPOSURE_INDEX, "ExposureIndex", FMT_URATIONAL, 1}, 282 { TAG_SENSING_METHOD, "SensingMethod", FMT_USHORT, 1}, 283 { TAG_FILE_SOURCE, "FileSource", 0, 1}, 284 { TAG_SCENE_TYPE, "SceneType", 0, 1}, 285 { TAG_CFA_PATTERN, "CFA Pattern", 0, -1}, 286 { TAG_CUSTOM_RENDERED, "CustomRendered", FMT_USHORT, 1}, 287 { TAG_EXPOSURE_MODE, "ExposureMode", FMT_USHORT, 1}, 288 { TAG_WHITEBALANCE, "WhiteBalance", FMT_USHORT, 1}, 289 { TAG_DIGITALZOOMRATIO, "DigitalZoomRatio", FMT_URATIONAL, 1}, 290 { TAG_FOCALLENGTH_35MM, "FocalLengthIn35mmFilm", FMT_USHORT, 1}, 291 { TAG_SCENE_CAPTURE_TYPE, "SceneCaptureType", FMT_USHORT, 1}, 292 { TAG_GAIN_CONTROL, "GainControl", FMT_URATIONAL, 1}, 293 { TAG_CONTRAST, "Contrast", FMT_USHORT, 1}, 294 { TAG_SATURATION, "Saturation", FMT_USHORT, 1}, 295 { TAG_SHARPNESS, "Sharpness", FMT_USHORT, 1}, 296 { TAG_DISTANCE_RANGE, "SubjectDistanceRange", FMT_USHORT, 1}, 297 } ; 298 299 #define TAG_TABLE_SIZE (sizeof(TagTable) / sizeof(TagTable_t)) 300 301 int TagNameToValue(const char* tagName) 302 { 303 unsigned int i; 304 for (i = 0; i < TAG_TABLE_SIZE; i++) { 305 if (strcmp(TagTable[i].Desc, tagName) == 0) { 306 printf("found tag %s val %d", TagTable[i].Desc, TagTable[i].Tag); 307 return TagTable[i].Tag; 308 } 309 } 310 printf("tag %s NOT FOUND", tagName); 311 return -1; 312 } 313 314 int IsDateTimeTag(unsigned short tag) 315 { 316 return ((tag == TAG_DATETIME)? TRUE: FALSE); 317 } 318 319 //-------------------------------------------------------------------------- 320 // Convert a 16 bit unsigned value to file's native byte order 321 //-------------------------------------------------------------------------- 322 static void Put16u(void * Short, unsigned short PutValue) 323 { 324 if (MotorolaOrder){ 325 ((uchar *)Short)[0] = (uchar)(PutValue>>8); 326 ((uchar *)Short)[1] = (uchar)PutValue; 327 }else{ 328 ((uchar *)Short)[0] = (uchar)PutValue; 329 ((uchar *)Short)[1] = (uchar)(PutValue>>8); 330 } 331 } 332 333 //-------------------------------------------------------------------------- 334 // Convert a 16 bit unsigned value from file's native byte order 335 //-------------------------------------------------------------------------- 336 int Get16u(void * Short) 337 { 338 if (MotorolaOrder){ 339 return (((uchar *)Short)[0] << 8) | ((uchar *)Short)[1]; 340 }else{ 341 return (((uchar *)Short)[1] << 8) | ((uchar *)Short)[0]; 342 } 343 } 344 345 //-------------------------------------------------------------------------- 346 // Convert a 32 bit signed value from file's native byte order 347 //-------------------------------------------------------------------------- 348 int Get32s(void * Long) 349 { 350 if (MotorolaOrder){ 351 return ((( char *)Long)[0] << 24) | (((uchar *)Long)[1] << 16) 352 | (((uchar *)Long)[2] << 8 ) | (((uchar *)Long)[3] << 0 ); 353 }else{ 354 return ((( char *)Long)[3] << 24) | (((uchar *)Long)[2] << 16) 355 | (((uchar *)Long)[1] << 8 ) | (((uchar *)Long)[0] << 0 ); 356 } 357 } 358 359 //-------------------------------------------------------------------------- 360 // Convert a 32 bit unsigned value to file's native byte order 361 //-------------------------------------------------------------------------- 362 void Put32u(void * Value, unsigned PutValue) 363 { 364 if (MotorolaOrder){ 365 ((uchar *)Value)[0] = (uchar)(PutValue>>24); 366 ((uchar *)Value)[1] = (uchar)(PutValue>>16); 367 ((uchar *)Value)[2] = (uchar)(PutValue>>8); 368 ((uchar *)Value)[3] = (uchar)PutValue; 369 }else{ 370 ((uchar *)Value)[0] = (uchar)PutValue; 371 ((uchar *)Value)[1] = (uchar)(PutValue>>8); 372 ((uchar *)Value)[2] = (uchar)(PutValue>>16); 373 ((uchar *)Value)[3] = (uchar)(PutValue>>24); 374 } 375 } 376 377 //-------------------------------------------------------------------------- 378 // Convert a 32 bit unsigned value from file's native byte order 379 //-------------------------------------------------------------------------- 380 unsigned Get32u(void * Long) 381 { 382 return (unsigned)Get32s(Long) & 0xffffffff; 383 } 384 385 //-------------------------------------------------------------------------- 386 // Display a number as one of its many formats 387 //-------------------------------------------------------------------------- 388 void PrintFormatNumber(void * ValuePtr, int Format, int ByteCount) 389 { 390 int s,n; 391 392 for(n=0;n<16;n++){ 393 switch(Format){ 394 case FMT_SBYTE: 395 case FMT_BYTE: printf("%02x",*(uchar *)ValuePtr); s=1; break; 396 case FMT_USHORT: printf("%d",Get16u(ValuePtr)); s=2; break; 397 case FMT_ULONG: 398 case FMT_SLONG: printf("%d",Get32s(ValuePtr)); s=4; break; 399 case FMT_SSHORT: printf("%hd",(signed short)Get16u(ValuePtr)); s=2; break; 400 case FMT_URATIONAL: 401 case FMT_SRATIONAL: 402 printf("%d/%d",Get32s(ValuePtr), Get32s(4+(char *)ValuePtr)); 403 s = 8; 404 break; 405 406 case FMT_SINGLE: printf("%f",(double)*(float *)ValuePtr); s=8; break; 407 case FMT_DOUBLE: printf("%f",*(double *)ValuePtr); s=8; break; 408 default: 409 printf("Unknown format %d:", Format); 410 return; 411 } 412 ByteCount -= s; 413 if (ByteCount <= 0) break; 414 printf(", "); 415 ValuePtr = (void *)((char *)ValuePtr + s); 416 417 } 418 if (n >= 16) printf("..."); 419 } 420 421 422 //-------------------------------------------------------------------------- 423 // Evaluate number, be it int, rational, or float from directory. 424 //-------------------------------------------------------------------------- 425 double ConvertAnyFormat(void * ValuePtr, int Format) 426 { 427 double Value; 428 Value = 0; 429 430 switch(Format){ 431 case FMT_SBYTE: Value = *(signed char *)ValuePtr; break; 432 case FMT_BYTE: Value = *(uchar *)ValuePtr; break; 433 434 case FMT_USHORT: Value = Get16u(ValuePtr); break; 435 case FMT_ULONG: Value = Get32u(ValuePtr); break; 436 437 case FMT_URATIONAL: 438 case FMT_SRATIONAL: 439 { 440 int Num,Den; 441 Num = Get32s(ValuePtr); 442 Den = Get32s(4+(char *)ValuePtr); 443 if (Den == 0){ 444 Value = 0; 445 }else{ 446 Value = (double)Num/Den; 447 } 448 break; 449 } 450 451 case FMT_SSHORT: Value = (signed short)Get16u(ValuePtr); break; 452 case FMT_SLONG: Value = Get32s(ValuePtr); break; 453 454 // Not sure if this is correct (never seen float used in Exif format) 455 case FMT_SINGLE: Value = (double)*(float *)ValuePtr; break; 456 case FMT_DOUBLE: Value = *(double *)ValuePtr; break; 457 458 default: 459 ErrNonfatal("Illegal format code %d",Format,0); 460 } 461 return Value; 462 } 463 464 //-------------------------------------------------------------------------- 465 // Convert a double value into a signed or unsigned rational number. 466 //-------------------------------------------------------------------------- 467 static void float2urat(double value, unsigned int max, unsigned int *numerator, 468 unsigned int *denominator) { 469 if (value <= 0) { 470 *numerator = 0; 471 *denominator = 1; 472 return; 473 } 474 475 if (value > max) { 476 *numerator = max; 477 *denominator = 1; 478 return; 479 } 480 481 // For values less than 1e-9, scale as much as possible 482 if (value < 1e-9) { 483 unsigned int n = (unsigned int)(value * max); 484 if (n == 0) { 485 *numerator = 0; 486 *denominator = 1; 487 } else { 488 *numerator = n; 489 *denominator = max; 490 } 491 return; 492 } 493 494 // Try to use a denominator of 1e9, 1e8, ..., until the numerator fits 495 unsigned int d; 496 for (d = 1000000000; d >= 1; d /= 10) { 497 double s = value * d; 498 if (s <= max) { 499 // Remove the trailing zeros from both. 500 unsigned int n = (unsigned int)s; 501 while (n % 10 == 0 && d >= 10) { 502 n /= 10; 503 d /= 10; 504 } 505 *numerator = n; 506 *denominator = d; 507 return; 508 } 509 } 510 511 // Shouldn't reach here because the denominator 1 should work 512 // above. But just in case. 513 *numerator = 0; 514 *denominator = 1; 515 } 516 517 static void ConvertDoubleToURational(double value, unsigned int *numerator, 518 unsigned int *denominator) { 519 float2urat(value, 0xFFFFFFFFU, numerator, denominator); 520 } 521 522 static void ConvertDoubleToSRational(double value, int *numerator, 523 int *denominator) { 524 int negative = 0; 525 526 if (value < 0) { 527 value = -value; 528 negative = 1; 529 } 530 531 unsigned int n, d; 532 float2urat(value, 0x7FFFFFFFU, &n, &d); 533 *numerator = (int)n; 534 *denominator = (int)d; 535 if (negative) { 536 *numerator = -*numerator; 537 } 538 } 539 540 //-------------------------------------------------------------------------- 541 // Process one of the nested EXIF directories. 542 //-------------------------------------------------------------------------- 543 static void ProcessExifDir(unsigned char * DirStart, unsigned char * OffsetBase, 544 unsigned ExifLength, int NestingLevel) 545 { 546 int de; 547 int a; 548 int NumDirEntries; 549 unsigned ThumbnailOffset = 0; 550 unsigned ThumbnailSize = 0; 551 char IndentString[25]; 552 553 printf("ProcessExifDir"); 554 if (NestingLevel > 4){ 555 ErrNonfatal("Maximum directory nesting exceeded (corrupt exif header)", 0,0); 556 return; 557 } 558 559 memset(IndentString, ' ', 25); 560 IndentString[NestingLevel * 4] = '\0'; 561 562 563 NumDirEntries = Get16u(DirStart); 564 #define DIR_ENTRY_ADDR(Start, Entry) (Start+2+12*(Entry)) 565 566 { 567 unsigned char * DirEnd; 568 DirEnd = DIR_ENTRY_ADDR(DirStart, NumDirEntries); 569 if (DirEnd+4 > (OffsetBase+ExifLength)){ 570 if (DirEnd+2 == OffsetBase+ExifLength || DirEnd == OffsetBase+ExifLength){ 571 // Version 1.3 of jhead would truncate a bit too much. 572 // This also caught later on as well. 573 }else{ 574 ErrNonfatal("Illegally sized exif subdirectory (%d entries)",NumDirEntries,0); 575 return; 576 } 577 } 578 if (DumpExifMap){ 579 printf("Map: %05d-%05d: Directory\n",(int)(DirStart-OffsetBase), (int)(DirEnd+4-OffsetBase)); 580 } 581 582 583 } 584 585 if (ShowTags){ 586 printf("(dir has %d entries)\n",NumDirEntries); 587 } 588 589 for (de=0;de<NumDirEntries;de++){ 590 int Tag, Format, Components; 591 unsigned char * ValuePtr; 592 int ByteCount; 593 unsigned char * DirEntry; 594 DirEntry = DIR_ENTRY_ADDR(DirStart, de); 595 596 Tag = Get16u(DirEntry); 597 Format = Get16u(DirEntry+2); 598 Components = Get32u(DirEntry+4); 599 600 if ((Format-1) >= NUM_FORMATS) { 601 // (-1) catches illegal zero case as unsigned underflows to positive large. 602 ErrNonfatal("Illegal number format %d for tag %04x", Format, Tag); 603 continue; 604 } 605 606 if ((unsigned)Components > 0x10000){ 607 ErrNonfatal("Illegal number of components %d for tag %04x", Components, Tag); 608 continue; 609 } 610 611 ByteCount = Components * BytesPerFormat[Format]; 612 613 if (ByteCount > 4){ 614 unsigned OffsetVal; 615 OffsetVal = Get32u(DirEntry+8); 616 // If its bigger than 4 bytes, the dir entry contains an offset. 617 if (OffsetVal+ByteCount > ExifLength){ 618 // Bogus pointer offset and / or bytecount value 619 ErrNonfatal("Illegal value pointer for tag %04x", Tag,0); 620 continue; 621 } 622 ValuePtr = OffsetBase+OffsetVal; 623 624 if (OffsetVal > ImageInfo.LargestExifOffset){ 625 ImageInfo.LargestExifOffset = OffsetVal; 626 } 627 628 if (DumpExifMap){ 629 printf("Map: %05d-%05d: Data for tag %04x\n",OffsetVal, OffsetVal+ByteCount, Tag); 630 } 631 }else{ 632 // 4 bytes or less and value is in the dir entry itself 633 ValuePtr = DirEntry+8; 634 } 635 636 if (Tag == TAG_MAKER_NOTE){ 637 if (ShowTags){ 638 printf("%s Maker note: ",IndentString); 639 } 640 ProcessMakerNote(ValuePtr, ByteCount, OffsetBase, ExifLength); 641 continue; 642 } 643 644 if (ShowTags){ 645 // Show tag name 646 for (a=0;;a++){ 647 if (a >= (int)TAG_TABLE_SIZE){ 648 printf("%s", IndentString); 649 printf(" Unknown Tag %04x Value = ", Tag); 650 break; 651 } 652 if (TagTable[a].Tag == Tag){ 653 printf("%s", IndentString); 654 printf(" %s = ",TagTable[a].Desc); 655 break; 656 } 657 } 658 659 // Show tag value. 660 switch(Format){ 661 case FMT_BYTE: 662 if(ByteCount>1){ 663 printf("%.*ls\n", ByteCount/2, (wchar_t *)ValuePtr); 664 }else{ 665 PrintFormatNumber(ValuePtr, Format, ByteCount); 666 printf("\n"); 667 } 668 break; 669 670 case FMT_UNDEFINED: 671 // Undefined is typically an ascii string. 672 673 case FMT_STRING: 674 // String arrays printed without function call (different from int arrays) 675 { 676 printf("\"%s\"", ValuePtr); 677 // int NoPrint = 0; 678 // printf("\""); 679 // for (a=0;a<ByteCount;a++){ 680 // if (ValuePtr[a] >= 32){ 681 // putchar(ValuePtr[a]); 682 // NoPrint = 0; 683 // }else{ 684 // // Avoiding indicating too many unprintable characters of proprietary 685 // // bits of binary information this program may not know how to parse. 686 // if (!NoPrint && a != ByteCount-1){ 687 // putchar('?'); 688 // NoPrint = 1; 689 // } 690 // } 691 // } 692 // printf("\"\n"); 693 } 694 break; 695 696 default: 697 // Handle arrays of numbers later (will there ever be?) 698 PrintFormatNumber(ValuePtr, Format, ByteCount); 699 printf("\n"); 700 } 701 } 702 703 // Extract useful components of tag 704 switch(Tag){ 705 706 case TAG_MAKE: 707 strncpy(ImageInfo.CameraMake, (char *)ValuePtr, ByteCount < 31 ? ByteCount : 31); 708 break; 709 710 case TAG_MODEL: 711 strncpy(ImageInfo.CameraModel, (char *)ValuePtr, ByteCount < 39 ? ByteCount : 39); 712 break; 713 714 case TAG_SUBSEC_TIME: 715 strlcpy(ImageInfo.SubSecTime, (char *)ValuePtr, sizeof(ImageInfo.SubSecTime)); 716 break; 717 718 case TAG_SUBSEC_TIME_ORIG: 719 strlcpy(ImageInfo.SubSecTimeOrig, (char *)ValuePtr, 720 sizeof(ImageInfo.SubSecTimeOrig)); 721 break; 722 723 case TAG_SUBSEC_TIME_DIG: 724 strlcpy(ImageInfo.SubSecTimeDig, (char *)ValuePtr, 725 sizeof(ImageInfo.SubSecTimeDig)); 726 break; 727 728 case TAG_DATETIME_DIGITIZED: 729 strlcpy(ImageInfo.DigitizedTime, (char *)ValuePtr, 730 sizeof(ImageInfo.DigitizedTime)); 731 732 if (ImageInfo.numDateTimeTags >= MAX_DATE_COPIES){ 733 ErrNonfatal("More than %d date fields! This is nuts", MAX_DATE_COPIES, 0); 734 break; 735 } 736 ImageInfo.DateTimeOffsets[ImageInfo.numDateTimeTags++] = 737 (char *)ValuePtr - (char *)OffsetBase; 738 break; 739 740 case TAG_DATETIME_ORIGINAL: 741 // If we get a DATETIME_ORIGINAL, we use that one. 742 strncpy(ImageInfo.DateTime, (char *)ValuePtr, 19); 743 // Fallthru... 744 745 case TAG_DATETIME: 746 if (!isdigit(ImageInfo.DateTime[0])){ 747 // If we don't already have a DATETIME_ORIGINAL, use whatever 748 // time fields we may have. 749 strncpy(ImageInfo.DateTime, (char *)ValuePtr, 19); 750 } 751 752 if (ImageInfo.numDateTimeTags >= MAX_DATE_COPIES){ 753 ErrNonfatal("More than %d date fields! This is nuts", MAX_DATE_COPIES, 0); 754 break; 755 } 756 ImageInfo.DateTimeOffsets[ImageInfo.numDateTimeTags++] = 757 (char *)ValuePtr - (char *)OffsetBase; 758 break; 759 760 case TAG_WINXP_COMMENT: 761 if (ImageInfo.Comments[0]){ // We already have a jpeg comment. 762 // Already have a comment (probably windows comment), skip this one. 763 if (ShowTags) printf("Windows XP commend and other comment in header\n"); 764 break; // Already have a windows comment, skip this one. 765 } 766 767 if (ByteCount > 1){ 768 if (ByteCount > MAX_COMMENT_SIZE) ByteCount = MAX_COMMENT_SIZE; 769 memcpy(ImageInfo.Comments, ValuePtr, ByteCount); 770 ImageInfo.CommentWidchars = ByteCount/2; 771 } 772 break; 773 774 case TAG_USERCOMMENT: 775 if (ImageInfo.Comments[0]){ // We already have a jpeg comment. 776 // Already have a comment (probably windows comment), skip this one. 777 if (ShowTags) printf("Multiple comments in exif header\n"); 778 break; // Already have a windows comment, skip this one. 779 } 780 781 // Comment is often padded with trailing spaces. Remove these first. 782 for (a=ByteCount;;){ 783 a--; 784 if ((ValuePtr)[a] == ' '){ 785 (ValuePtr)[a] = '\0'; 786 }else{ 787 break; 788 } 789 if (a == 0) break; 790 } 791 792 // Copy the comment 793 { 794 // We want to set copied comment length (msize) to be the 795 // minimum of: 796 // (1) The space still available in Exif 797 // (2) The given comment length (ByteCount) 798 // (3) MAX_COMMENT_SIZE - 1 799 int msiz = ExifLength - (ValuePtr-OffsetBase); 800 if (msiz > ByteCount) msiz = ByteCount; 801 if (msiz > MAX_COMMENT_SIZE - 1) msiz = MAX_COMMENT_SIZE - 1; 802 if (msiz > 5 && memcmp(ValuePtr, "ASCII", 5) == 0) { 803 for (a = 5; a < 10 && a < msiz; a++) { 804 int c = (ValuePtr)[a]; 805 if (c != '\0' && c != ' ') { 806 strncpy(ImageInfo.Comments, 807 (char *)ValuePtr + a, msiz - a); 808 break; 809 } 810 } 811 } else { 812 strncpy(ImageInfo.Comments, (char *)ValuePtr, msiz); 813 } 814 } 815 break; 816 817 case TAG_FNUMBER: 818 // Simplest way of expressing aperture, so I trust it the most. 819 // (overwrite previously computd value if there is one) 820 ImageInfo.ApertureFNumber = (float)ConvertAnyFormat(ValuePtr, Format); 821 break; 822 823 case TAG_APERTURE: 824 case TAG_MAXAPERTURE: 825 // More relevant info always comes earlier, so only use this field if we don't 826 // have appropriate aperture information yet. 827 if (ImageInfo.ApertureFNumber == 0){ 828 ImageInfo.ApertureFNumber 829 = (float)exp(ConvertAnyFormat(ValuePtr, Format)*log(2)*0.5); 830 } 831 break; 832 833 case TAG_FOCALLENGTH: 834 // Nice digital cameras actually save the focal length as a function 835 // of how farthey are zoomed in. 836 ImageInfo.FocalLength.num = Get32u(ValuePtr); 837 ImageInfo.FocalLength.denom = Get32u(4+(char *)ValuePtr); 838 break; 839 840 case TAG_SUBJECT_DISTANCE: 841 // Inidcates the distacne the autofocus camera is focused to. 842 // Tends to be less accurate as distance increases. 843 ImageInfo.Distance = (float)ConvertAnyFormat(ValuePtr, Format); 844 break; 845 846 case TAG_EXPOSURETIME: 847 // Simplest way of expressing exposure time, so I trust it most. 848 // (overwrite previously computd value if there is one) 849 ImageInfo.ExposureTime = (float)ConvertAnyFormat(ValuePtr, Format); 850 break; 851 852 case TAG_SHUTTERSPEED: 853 // More complicated way of expressing exposure time, so only use 854 // this value if we don't already have it from somewhere else. 855 if (ImageInfo.ExposureTime == 0){ 856 ImageInfo.ExposureTime 857 = (float)(1/exp(ConvertAnyFormat(ValuePtr, Format)*log(2))); 858 } 859 break; 860 861 862 case TAG_FLASH: 863 ImageInfo.FlashUsed=(int)ConvertAnyFormat(ValuePtr, Format); 864 break; 865 866 case TAG_ORIENTATION: 867 if (NumOrientations >= 2){ 868 // Can have another orientation tag for the thumbnail, but if there's 869 // a third one, things are stringae. 870 ErrNonfatal("More than two orientation tags!",0,0); 871 break; 872 } 873 OrientationPtr[NumOrientations] = ValuePtr; 874 OrientationNumFormat[NumOrientations] = Format; 875 if (NumOrientations == 0){ 876 ImageInfo.Orientation = (int)ConvertAnyFormat(ValuePtr, Format); 877 } 878 if (ImageInfo.Orientation < 0 || ImageInfo.Orientation > 8){ 879 ErrNonfatal("Undefined rotation value %d", ImageInfo.Orientation, 0); 880 ImageInfo.Orientation = 0; 881 } 882 NumOrientations += 1; 883 break; 884 885 case TAG_EXIF_IMAGELENGTH: 886 case TAG_EXIF_IMAGEWIDTH: 887 // Use largest of height and width to deal with images that have been 888 // rotated to portrait format. 889 a = (int)ConvertAnyFormat(ValuePtr, Format); 890 if (ExifImageWidth < a) ExifImageWidth = a; 891 break; 892 893 case TAG_FOCAL_PLANE_XRES: 894 FocalplaneXRes = ConvertAnyFormat(ValuePtr, Format); 895 break; 896 897 case TAG_FOCAL_PLANE_UNITS: 898 switch((int)ConvertAnyFormat(ValuePtr, Format)){ 899 case 1: FocalplaneUnits = 25.4; break; // inch 900 case 2: 901 // According to the information I was using, 2 means meters. 902 // But looking at the Cannon powershot's files, inches is the only 903 // sensible value. 904 FocalplaneUnits = 25.4; 905 break; 906 907 case 3: FocalplaneUnits = 10; break; // centimeter 908 case 4: FocalplaneUnits = 1; break; // millimeter 909 case 5: FocalplaneUnits = .001; break; // micrometer 910 } 911 break; 912 913 case TAG_EXPOSURE_BIAS: 914 ImageInfo.ExposureBias = (float)ConvertAnyFormat(ValuePtr, Format); 915 break; 916 917 case TAG_WHITEBALANCE: 918 ImageInfo.Whitebalance = (int)ConvertAnyFormat(ValuePtr, Format); 919 break; 920 921 case TAG_LIGHT_SOURCE: 922 ImageInfo.LightSource = (int)ConvertAnyFormat(ValuePtr, Format); 923 break; 924 925 case TAG_METERING_MODE: 926 ImageInfo.MeteringMode = (int)ConvertAnyFormat(ValuePtr, Format); 927 break; 928 929 case TAG_EXPOSURE_PROGRAM: 930 ImageInfo.ExposureProgram = (int)ConvertAnyFormat(ValuePtr, Format); 931 break; 932 933 case TAG_EXPOSURE_INDEX: 934 if (ImageInfo.ISOequivalent == 0){ 935 // Exposure index and ISO equivalent are often used interchangeably, 936 // so we will do the same in jhead. 937 // http://photography.about.com/library/glossary/bldef_ei.htm 938 ImageInfo.ISOequivalent = (int)ConvertAnyFormat(ValuePtr, Format); 939 } 940 break; 941 942 case TAG_EXPOSURE_MODE: 943 ImageInfo.ExposureMode = (int)ConvertAnyFormat(ValuePtr, Format); 944 break; 945 946 case TAG_ISO_EQUIVALENT: 947 ImageInfo.ISOequivalent = (int)ConvertAnyFormat(ValuePtr, Format); 948 if ( ImageInfo.ISOequivalent < 50 ){ 949 // Fixes strange encoding on some older digicams. 950 ImageInfo.ISOequivalent *= 200; 951 } 952 break; 953 954 case TAG_DIGITALZOOMRATIO: 955 ImageInfo.DigitalZoomRatio = (float)ConvertAnyFormat(ValuePtr, Format); 956 break; 957 958 case TAG_THUMBNAIL_OFFSET: 959 ThumbnailOffset = (unsigned)ConvertAnyFormat(ValuePtr, Format); 960 DirWithThumbnailPtrs = DirStart; 961 break; 962 963 case TAG_THUMBNAIL_LENGTH: 964 ThumbnailSize = (unsigned)ConvertAnyFormat(ValuePtr, Format); 965 ImageInfo.ThumbnailSizeOffset = ValuePtr-OffsetBase; 966 break; 967 968 case TAG_EXIF_OFFSET: 969 if (ShowTags) printf("%s Exif Dir:",IndentString); 970 971 case TAG_INTEROP_OFFSET: 972 if (Tag == TAG_INTEROP_OFFSET && ShowTags) printf("%s Interop Dir:",IndentString); 973 { 974 unsigned char * SubdirStart; 975 SubdirStart = OffsetBase + Get32u(ValuePtr); 976 if (SubdirStart < OffsetBase || SubdirStart > OffsetBase+ExifLength){ 977 ErrNonfatal("Illegal exif or interop ofset directory link",0,0); 978 }else{ 979 ProcessExifDir(SubdirStart, OffsetBase, ExifLength, NestingLevel+1); 980 } 981 continue; 982 } 983 break; 984 985 case TAG_GPSINFO: 986 if (ShowTags) printf("%s GPS info dir:",IndentString); 987 { 988 unsigned char * SubdirStart; 989 SubdirStart = OffsetBase + Get32u(ValuePtr); 990 if (SubdirStart < OffsetBase || SubdirStart > OffsetBase+ExifLength){ 991 ErrNonfatal("Illegal GPS directory link",0,0); 992 }else{ 993 ProcessGpsInfo(SubdirStart, ByteCount, OffsetBase, ExifLength); 994 } 995 continue; 996 } 997 break; 998 999 case TAG_FOCALLENGTH_35MM: 1000 // The focal length equivalent 35 mm is a 2.2 tag (defined as of April 2002) 1001 // if its present, use it to compute equivalent focal length instead of 1002 // computing it from sensor geometry and actual focal length. 1003 ImageInfo.FocalLength35mmEquiv = (unsigned)ConvertAnyFormat(ValuePtr, Format); 1004 break; 1005 1006 case TAG_DISTANCE_RANGE: 1007 // Three possible standard values: 1008 // 1 = macro, 2 = close, 3 = distant 1009 ImageInfo.DistanceRange = (int)ConvertAnyFormat(ValuePtr, Format); 1010 break; 1011 } 1012 } 1013 1014 1015 { 1016 // In addition to linking to subdirectories via exif tags, 1017 // there's also a potential link to another directory at the end of each 1018 // directory. this has got to be the result of a committee! 1019 unsigned char * SubdirStart; 1020 unsigned Offset; 1021 1022 if (DIR_ENTRY_ADDR(DirStart, NumDirEntries) + 4 <= OffsetBase+ExifLength){ 1023 printf("DirStart %p offset from dirstart %d", DirStart, 2+12*NumDirEntries); 1024 Offset = Get32u(DirStart+2+12*NumDirEntries); 1025 if (Offset){ 1026 SubdirStart = OffsetBase + Offset; 1027 if (SubdirStart > OffsetBase+ExifLength || SubdirStart < OffsetBase){ 1028 printf("SubdirStart %p OffsetBase %p ExifLength %d Offset %d", 1029 SubdirStart, OffsetBase, ExifLength, Offset); 1030 if (SubdirStart > OffsetBase && SubdirStart < OffsetBase+ExifLength+20){ 1031 // Jhead 1.3 or earlier would crop the whole directory! 1032 // As Jhead produces this form of format incorrectness, 1033 // I'll just let it pass silently 1034 if (ShowTags) printf("Thumbnail removed with Jhead 1.3 or earlier\n"); 1035 }else{ 1036 ErrNonfatal("Illegal subdirectory link",0,0); 1037 } 1038 }else{ 1039 if (SubdirStart <= OffsetBase+ExifLength){ 1040 if (ShowTags) printf("%s Continued directory ",IndentString); 1041 ProcessExifDir(SubdirStart, OffsetBase, ExifLength, NestingLevel+1); 1042 } 1043 } 1044 if (Offset > ImageInfo.LargestExifOffset){ 1045 ImageInfo.LargestExifOffset = Offset; 1046 } 1047 } 1048 }else{ 1049 // The exif header ends before the last next directory pointer. 1050 } 1051 } 1052 1053 if (ThumbnailOffset){ 1054 ImageInfo.ThumbnailAtEnd = FALSE; 1055 1056 if (DumpExifMap){ 1057 printf("Map: %05d-%05d: Thumbnail\n",ThumbnailOffset, ThumbnailOffset+ThumbnailSize); 1058 } 1059 1060 if (ThumbnailOffset <= ExifLength){ 1061 if (ThumbnailSize > ExifLength-ThumbnailOffset){ 1062 // If thumbnail extends past exif header, only save the part that 1063 // actually exists. Canon's EOS viewer utility will do this - the 1064 // thumbnail extracts ok with this hack. 1065 ThumbnailSize = ExifLength-ThumbnailOffset; 1066 if (ShowTags) printf("Thumbnail incorrectly placed in header\n"); 1067 1068 } 1069 // The thumbnail pointer appears to be valid. Store it. 1070 ImageInfo.ThumbnailOffset = ThumbnailOffset; 1071 ImageInfo.ThumbnailSize = ThumbnailSize; 1072 1073 if (ShowTags){ 1074 printf("Thumbnail size: %d bytes\n",ThumbnailSize); 1075 } 1076 } 1077 } 1078 printf("returning from ProcessExifDir"); 1079 } 1080 1081 1082 //-------------------------------------------------------------------------- 1083 // Process a EXIF marker 1084 // Describes all the drivel that most digital cameras include... 1085 //-------------------------------------------------------------------------- 1086 void process_EXIF (unsigned char * ExifSection, unsigned int length) 1087 { 1088 int FirstOffset; 1089 1090 FocalplaneXRes = 0; 1091 FocalplaneUnits = 0; 1092 ExifImageWidth = 0; 1093 NumOrientations = 0; 1094 1095 if (ShowTags){ 1096 printf("Exif header %d bytes long\n",length); 1097 } 1098 1099 { // Check the EXIF header component 1100 static uchar ExifHeader[] = "Exif\0\0"; 1101 if (memcmp(ExifSection+2, ExifHeader,6)){ 1102 ErrNonfatal("Incorrect Exif header",0,0); 1103 return; 1104 } 1105 } 1106 1107 if (memcmp(ExifSection+8,"II",2) == 0){ 1108 if (ShowTags) printf("Exif section in Intel order\n"); 1109 MotorolaOrder = 0; 1110 }else{ 1111 if (memcmp(ExifSection+8,"MM",2) == 0){ 1112 if (ShowTags) printf("Exif section in Motorola order\n"); 1113 MotorolaOrder = 1; 1114 }else{ 1115 ErrNonfatal("Invalid Exif alignment marker.",0,0); 1116 return; 1117 } 1118 } 1119 1120 // Check the next value for correctness. 1121 if (Get16u(ExifSection+10) != 0x2a){ 1122 ErrNonfatal("Invalid Exif start (1)",0,0); 1123 return; 1124 } 1125 1126 FirstOffset = Get32u(ExifSection+12); 1127 if (FirstOffset < 8 || FirstOffset > 16){ 1128 // Usually set to 8, but other values valid too. 1129 ErrNonfatal("Suspicious offset of first IFD value",0,0); 1130 return; 1131 } 1132 1133 DirWithThumbnailPtrs = NULL; 1134 1135 1136 // First directory starts 16 bytes in. All offset are relative to 8 bytes in. 1137 ProcessExifDir(ExifSection+8+FirstOffset, ExifSection+8, length-8, 0); 1138 1139 ImageInfo.ThumbnailAtEnd = ImageInfo.ThumbnailOffset >= ImageInfo.LargestExifOffset ? TRUE : FALSE; 1140 #ifdef SUPERDEBUG 1141 printf("Thumbnail %s end", (ImageInfo.ThumbnailAtEnd ? "at" : "NOT at")); 1142 #endif 1143 if (DumpExifMap){ 1144 unsigned a,b; 1145 printf("Map: %05d- End of exif\n",length-8); 1146 // for (a=0;a<length-8;a+= 10){ 1147 // printf("Map: %05d ",a); 1148 // for (b=0;b<10;b++) printf(" %02x",*(ExifSection+8+a+b)); 1149 // printf("\n"); 1150 // } 1151 for (a = 0; a < length - 8; ++a) { 1152 unsigned char c = *(ExifSection+8+a); 1153 unsigned pc = isprint(c) ? c : ' '; 1154 printf("Map: %4d %02x %c", a, c, pc); 1155 } 1156 } 1157 1158 1159 // Compute the CCD width, in millimeters. 1160 if (FocalplaneXRes != 0){ 1161 // Note: With some cameras, its not possible to compute this correctly because 1162 // they don't adjust the indicated focal plane resolution units when using less 1163 // than maximum resolution, so the CCDWidth value comes out too small. Nothing 1164 // that Jhad can do about it - its a camera problem. 1165 ImageInfo.CCDWidth = (float)(ExifImageWidth * FocalplaneUnits / FocalplaneXRes); 1166 1167 if (ImageInfo.FocalLength.num != 0 && ImageInfo.FocalLength.denom != 0 1168 && ImageInfo.FocalLength35mmEquiv == 0){ 1169 // Compute 35 mm equivalent focal length based on sensor geometry if we haven't 1170 // already got it explicitly from a tag. 1171 ImageInfo.FocalLength35mmEquiv = (int)( 1172 (double)ImageInfo.FocalLength.num / ImageInfo.FocalLength.denom 1173 / ImageInfo.CCDWidth * 36 + 0.5); 1174 } 1175 } 1176 } 1177 1178 static const TagTable_t* TagToTagTableEntry(unsigned short tag) 1179 { 1180 unsigned int i; 1181 for (i = 0; i < TAG_TABLE_SIZE; i++) { 1182 if (TagTable[i].Tag == tag) { 1183 printf("found tag %d", tag); 1184 int format = TagTable[i].Format; 1185 if (format == 0) { 1186 printf("tag %s format not defined ***** YOU MUST ADD THE FORMAT TO THE TagTable in exif.c!!!!", TagTable[i].Desc); 1187 return NULL; 1188 } 1189 return &TagTable[i]; 1190 } 1191 } 1192 printf("tag %d NOT FOUND", tag); 1193 return NULL; 1194 } 1195 1196 static void writeExifTagAndData(int tag, 1197 int format, 1198 long components, 1199 long value, 1200 int valueInString, 1201 char* Buffer, 1202 int* DirIndex, 1203 int* DataWriteIndex) { 1204 void* componentsPosition = NULL; // for saving component position 1205 1206 Put16u(Buffer+ (*DirIndex), tag); // Tag 1207 Put16u(Buffer+(*DirIndex) + 2, format); // Format 1208 if (format == FMT_STRING && components == -1) { 1209 components = strlen((char*)value) + 1; // account for null terminator 1210 if (components & 1) ++components; // no odd lengths 1211 } else if (format == FMT_SSHORT && components == -1) { 1212 // jhead only supports reading one SSHORT anyway 1213 components = 1; 1214 } 1215 if (format == FMT_UNDEFINED && components == -1) { 1216 // check if this UNDEFINED format is actually ASCII (as it usually is) 1217 // if so, we can calculate the size 1218 if(memcmp((char*)value, ExifAsciiPrefix, sizeof(ExifAsciiPrefix)) == 0) { 1219 components = sizeof(ExifAsciiPrefix) + 1220 strlen((char*)value + sizeof(ExifAsciiPrefix)) + 1; 1221 if (components & 1) ++components; // no odd lengths 1222 } 1223 } 1224 Put32u(Buffer+(*DirIndex) + 4, components); // Components 1225 componentsPosition = Buffer+(*DirIndex) + 4; // components # can change for lists 1226 printf("# components: %ld", components); 1227 if (format == FMT_STRING) { 1228 // short strings can fit right in the long, otherwise have to 1229 // go in the data area 1230 if (components <= 4) { 1231 strcpy(Buffer+(*DirIndex) + 8, (char*)value); 1232 } else { 1233 Put32u(Buffer+(*DirIndex) + 8, (*DataWriteIndex)-8); // Pointer 1234 printf("copying value %s to %d", (char*)value, (*DataWriteIndex)); 1235 strncpy(Buffer+(*DataWriteIndex), (char*)value, components); 1236 (*DataWriteIndex) += components; 1237 } 1238 } else if ((format == FMT_UNDEFINED) && 1239 (memcmp((char*)value, ExifAsciiPrefix, sizeof(ExifAsciiPrefix)) == 0)) { 1240 // short strings can fit right in the long, otherwise have to 1241 // go in the data area 1242 if (components <= 4) { 1243 memcpy(Buffer+(*DirIndex) + 8, (char*)value, components); 1244 } else { 1245 Put32u(Buffer+(*DirIndex) + 8, (*DataWriteIndex)-8); // Pointer 1246 printf("copying %s to %d", (char*)value + sizeof(ExifAsciiPrefix), (*DataWriteIndex)); 1247 memcpy(Buffer+(*DataWriteIndex), (char*)value, components); 1248 (*DataWriteIndex) += components; 1249 } 1250 } else if (!valueInString) { 1251 Put32u(Buffer+(*DirIndex) + 8, value); // Value 1252 } else { 1253 Put32u(Buffer+(*DirIndex) + 8, (*DataWriteIndex)-8); // Pointer 1254 // Usually the separator is ',', but sometimes ':' is used, like 1255 // TAG_GPS_TIMESTAMP. 1256 char* curElement = strtok((char*)value, ",:"); 1257 int i; 1258 1259 // (components == -1) Need to handle lists with unknown length too 1260 for (i = 0; ((i < components) || (components == -1)) && curElement != NULL; i++) { 1261 #ifdef SUPERDEBUG 1262 printf("processing component %s format %s", curElement, formatStr(format)); 1263 #endif 1264 // elements are separated by commas 1265 if (format == FMT_URATIONAL) { 1266 unsigned int numerator; 1267 unsigned int denominator; 1268 char* separator = strchr(curElement, '/'); 1269 if (separator) { 1270 numerator = atoi(curElement); 1271 denominator = atoi(separator + 1); 1272 } else { 1273 double value = atof(curElement); 1274 ConvertDoubleToURational(value, &numerator, &denominator); 1275 } 1276 Put32u(Buffer+(*DataWriteIndex), numerator); 1277 Put32u(Buffer+(*DataWriteIndex) + 4, denominator); 1278 (*DataWriteIndex) += 8; 1279 } else if (format == FMT_SRATIONAL) { 1280 int numerator; 1281 int denominator; 1282 char* separator = strchr(curElement, '/'); 1283 if (separator) { 1284 numerator = atoi(curElement); 1285 denominator = atoi(separator + 1); 1286 } else { 1287 double value = atof(curElement); 1288 ConvertDoubleToSRational(value, &numerator, &denominator); 1289 } 1290 Put32u(Buffer+(*DataWriteIndex), numerator); 1291 Put32u(Buffer+(*DataWriteIndex) + 4, denominator); 1292 (*DataWriteIndex) += 8; 1293 } else if ((components == -1) && ((format == FMT_USHORT) || (format == FMT_SSHORT))) { 1294 // variable components need to go into data write area 1295 value = atoi(curElement); 1296 Put16u(Buffer+(*DataWriteIndex), value); 1297 (*DataWriteIndex) += 4; 1298 } else { 1299 // TODO: doesn't handle multiple components yet -- if more than one, have to put in data write area. 1300 value = atoi(curElement); 1301 Put32u(Buffer+(*DirIndex) + 8, value); // Value 1302 } 1303 curElement = strtok(NULL, ",:"); 1304 } 1305 if (components == -1) Put32u(componentsPosition, i); // update component # for unknowns 1306 } 1307 (*DirIndex) += 12; 1308 } 1309 1310 #ifdef SUPERDEBUG 1311 char* formatStr(int format) { 1312 switch (format) { 1313 case FMT_BYTE: return "FMT_BYTE"; break; 1314 case FMT_STRING: return "FMT_STRING"; break; 1315 case FMT_USHORT: return "FMT_USHORT"; break; 1316 case FMT_ULONG: return "FMT_ULONG"; break; 1317 case FMT_URATIONAL: return "FMT_URATIONAL"; break; 1318 case FMT_SBYTE: return "FMT_SBYTE"; break; 1319 case FMT_UNDEFINED: return "FMT_UNDEFINED"; break; 1320 case FMT_SSHORT: return "FMT_SSHORT"; break; 1321 case FMT_SLONG: return "FMT_SLONG"; break; 1322 case FMT_SRATIONAL: return "FMT_SRATIONAL"; break; 1323 case FMT_SINGLE: return "FMT_SINGLE"; break; 1324 case FMT_DOUBLE: return "FMT_SINGLE"; break; 1325 default: return "UNKNOWN"; 1326 } 1327 } 1328 #endif 1329 1330 //-------------------------------------------------------------------------- 1331 // Create minimal exif header - just date and thumbnail pointers, 1332 // so that date and thumbnail may be filled later. 1333 //-------------------------------------------------------------------------- 1334 static void create_EXIF_internal(ExifElement_t* elements, int exifTagCount, int gpsTagCount, int hasDateTimeTag, char* Buffer) 1335 { 1336 unsigned short NumEntries; 1337 int DataWriteIndex; 1338 int DirIndex; 1339 int DirExifLink = 0; 1340 1341 #ifdef SUPERDEBUG 1342 ALOGE("create_EXIF %d exif elements, %d gps elements", exifTagCount, gpsTagCount); 1343 #endif 1344 1345 MotorolaOrder = 0; 1346 1347 memcpy(Buffer+2, "Exif\0\0II",8); 1348 Put16u(Buffer+10, 0x2a); 1349 1350 DataWriteIndex = 16; 1351 Put32u(Buffer+12, DataWriteIndex-8); // first IFD offset. Means start 16 bytes in. 1352 1353 { 1354 DirIndex = DataWriteIndex; 1355 NumEntries = 1 + exifTagCount; // the extra is the thumbnail 1356 if (gpsTagCount) { 1357 ++NumEntries; // allow for the GPS info tag 1358 } 1359 if (!hasDateTimeTag) { 1360 // We have to write extra date time tag. The entry number should be 1361 // adjusted. 1362 ++NumEntries; 1363 } 1364 DataWriteIndex += 2 + NumEntries*12 + 4; 1365 1366 Put16u(Buffer+DirIndex, NumEntries); // Number of entries 1367 DirIndex += 2; 1368 1369 // Entries go here... 1370 if (!hasDateTimeTag) { 1371 // Date/time entry 1372 char* dateTime = NULL; 1373 char dateBuf[20]; 1374 if (ImageInfo.numDateTimeTags) { 1375 // If we had a pre-existing exif header, use time from that. 1376 dateTime = ImageInfo.DateTime; 1377 } else { 1378 // Oterwise, use the file's timestamp. 1379 FileTimeAsString(dateBuf); 1380 dateTime = dateBuf; 1381 } 1382 writeExifTagAndData(TAG_DATETIME, 1383 FMT_STRING, 1384 20, 1385 (long)(char*)dateBuf, 1386 FALSE, 1387 Buffer, 1388 &DirIndex, 1389 &DataWriteIndex); 1390 1391 } 1392 if (exifTagCount > 0) { 1393 int i; 1394 for (i = 0; i < exifTagCount + gpsTagCount; i++) { 1395 if (elements[i].GpsTag) { 1396 continue; 1397 } 1398 const TagTable_t* entry = TagToTagTableEntry(elements[i].Tag); 1399 if (entry == NULL) { 1400 continue; 1401 } 1402 #ifdef SUPERDEBUG 1403 ALOGE("create_EXIF saving tag %x value \"%s\"",elements[i].Tag, elements[i].Value); 1404 #endif 1405 writeExifTagAndData(elements[i].Tag, 1406 entry->Format, 1407 entry->DataLength, 1408 (long)elements[i].Value, 1409 TRUE, 1410 Buffer, 1411 &DirIndex, 1412 &DataWriteIndex); 1413 } 1414 1415 if (gpsTagCount) { 1416 // Link to gps dir entry 1417 writeExifTagAndData(TAG_GPSINFO, 1418 FMT_ULONG, 1419 1, 1420 DataWriteIndex-8, 1421 FALSE, 1422 Buffer, 1423 &DirIndex, 1424 &DataWriteIndex); 1425 } 1426 1427 // Link to exif dir entry 1428 int exifDirPtr = DataWriteIndex-8; 1429 if (gpsTagCount) { 1430 exifDirPtr += 2 + gpsTagCount*12 + 4; 1431 } 1432 DirExifLink = DirIndex; 1433 writeExifTagAndData(TAG_EXIF_OFFSET, 1434 FMT_ULONG, 1435 1, 1436 exifDirPtr, 1437 FALSE, 1438 Buffer, 1439 &DirIndex, 1440 &DataWriteIndex); 1441 } 1442 1443 // End of directory - contains optional link to continued directory. 1444 Put32u(Buffer+DirIndex, 0); 1445 printf("Ending Exif section DirIndex = %d DataWriteIndex %d", DirIndex, DataWriteIndex); 1446 } 1447 1448 1449 // GPS Section 1450 if (gpsTagCount) { 1451 DirIndex = DataWriteIndex; 1452 printf("Starting GPS section DirIndex = %d", DirIndex); 1453 NumEntries = gpsTagCount; 1454 DataWriteIndex += 2 + NumEntries*12 + 4; 1455 1456 Put16u(Buffer+DirIndex, NumEntries); // Number of entries 1457 DirIndex += 2; 1458 { 1459 int i; 1460 for (i = 0; i < exifTagCount + gpsTagCount; i++) { 1461 if (!elements[i].GpsTag) { 1462 continue; 1463 } 1464 const TagTable_t* entry = GpsTagToTagTableEntry(elements[i].Tag); 1465 if (entry == NULL) { 1466 continue; 1467 } 1468 #ifdef SUPERDEBUG 1469 ALOGE("create_EXIF saving GPS tag %x value \"%s\"",elements[i].Tag, elements[i].Value); 1470 #endif 1471 writeExifTagAndData(elements[i].Tag, 1472 entry->Format, 1473 entry->DataLength, 1474 (long)elements[i].Value, 1475 TRUE, 1476 Buffer, 1477 &DirIndex, 1478 &DataWriteIndex); 1479 } 1480 } 1481 1482 // End of directory - contains optional link to continued directory. 1483 Put32u(Buffer+DirIndex, 0); 1484 printf("Ending GPS section DirIndex = %d DataWriteIndex %d", DirIndex, DataWriteIndex); 1485 } 1486 1487 { 1488 // Overwriting TAG_EXIF_OFFSET which links to this directory 1489 Put32u(Buffer+DirExifLink+8, DataWriteIndex-8); 1490 1491 printf("Starting Thumbnail section DirIndex = %d", DirIndex); 1492 DirIndex = DataWriteIndex; 1493 NumEntries = 2; 1494 DataWriteIndex += 2 + NumEntries*12 + 4; 1495 1496 Put16u(Buffer+DirIndex, NumEntries); // Number of entries 1497 DirIndex += 2; 1498 { 1499 // Link to exif dir entry 1500 writeExifTagAndData(TAG_THUMBNAIL_OFFSET, 1501 FMT_ULONG, 1502 1, 1503 DataWriteIndex-8, 1504 FALSE, 1505 Buffer, 1506 &DirIndex, 1507 &DataWriteIndex); 1508 } 1509 1510 { 1511 // Link to exif dir entry 1512 writeExifTagAndData(TAG_THUMBNAIL_LENGTH, 1513 FMT_ULONG, 1514 1, 1515 0, 1516 FALSE, 1517 Buffer, 1518 &DirIndex, 1519 &DataWriteIndex); 1520 } 1521 1522 // End of directory - contains optional link to continued directory. 1523 Put32u(Buffer+DirIndex, 0); 1524 printf("Ending Thumbnail section DirIndex = %d DataWriteIndex %d", DirIndex, DataWriteIndex); 1525 } 1526 1527 1528 Buffer[0] = (unsigned char)(DataWriteIndex >> 8); 1529 Buffer[1] = (unsigned char)DataWriteIndex; 1530 1531 // Remove old exif section, if there was one. 1532 RemoveSectionType(M_EXIF); 1533 1534 { 1535 // Sections need malloced buffers, so do that now, especially because 1536 // we now know how big it needs to be allocated. 1537 unsigned char * NewBuf = malloc(DataWriteIndex); 1538 if (NewBuf == NULL){ 1539 ErrFatal("Could not allocate memory"); 1540 } 1541 memcpy(NewBuf, Buffer, DataWriteIndex); 1542 1543 CreateSection(M_EXIF, NewBuf, DataWriteIndex); 1544 1545 // Re-parse new exif section, now that its in place 1546 // otherwise, we risk touching data that has already been freed. 1547 process_EXIF(NewBuf, DataWriteIndex); 1548 } 1549 } 1550 1551 void create_EXIF(ExifElement_t* elements, int exifTagCount, int gpsTagCount, int hasDateTimeTag) 1552 { 1553 // It is hard to calculate exact necessary size for editing the exif 1554 // header dynamically, so we are using the maximum size of EXIF, 64K 1555 const int EXIF_MAX_SIZE = 1024*64; 1556 char* Buffer = malloc(EXIF_MAX_SIZE); 1557 1558 if (Buffer != NULL) { 1559 create_EXIF_internal(elements, exifTagCount, gpsTagCount, hasDateTimeTag, Buffer); 1560 free(Buffer); 1561 } else { 1562 ErrFatal("Could not allocate memory"); 1563 } 1564 } 1565 1566 //-------------------------------------------------------------------------- 1567 // Cler the rotation tag in the exif header to 1. 1568 //-------------------------------------------------------------------------- 1569 const char * ClearOrientation(void) 1570 { 1571 int a; 1572 if (NumOrientations == 0) return NULL; 1573 1574 for (a=0;a<NumOrientations;a++){ 1575 switch(OrientationNumFormat[a]){ 1576 case FMT_SBYTE: 1577 case FMT_BYTE: 1578 *(uchar *)(OrientationPtr[a]) = 1; 1579 break; 1580 1581 case FMT_USHORT: 1582 Put16u(OrientationPtr[a], 1); 1583 break; 1584 1585 case FMT_ULONG: 1586 case FMT_SLONG: 1587 memset(OrientationPtr, 0, 4); 1588 // Can't be bothered to write generic Put32 if I only use it once. 1589 if (MotorolaOrder){ 1590 ((uchar *)OrientationPtr[a])[3] = 1; 1591 }else{ 1592 ((uchar *)OrientationPtr[a])[0] = 1; 1593 } 1594 break; 1595 1596 default: 1597 return NULL; 1598 } 1599 } 1600 1601 return OrientTab[ImageInfo.Orientation]; 1602 } 1603 1604 1605 1606 //-------------------------------------------------------------------------- 1607 // Remove thumbnail out of the exif image. 1608 //-------------------------------------------------------------------------- 1609 int RemoveThumbnail(unsigned char * ExifSection) 1610 { 1611 if (!DirWithThumbnailPtrs || 1612 ImageInfo.ThumbnailOffset == 0 || 1613 ImageInfo.ThumbnailSize == 0){ 1614 // No thumbnail, or already deleted it. 1615 return 0; 1616 } 1617 if (ImageInfo.ThumbnailAtEnd == FALSE){ 1618 ErrNonfatal("Thumbnail is not at end of header, can't chop it off", 0, 0); 1619 return 0; 1620 } 1621 1622 { 1623 int de; 1624 int NumDirEntries; 1625 NumDirEntries = Get16u(DirWithThumbnailPtrs); 1626 1627 for (de=0;de<NumDirEntries;de++){ 1628 int Tag; 1629 unsigned char * DirEntry; 1630 DirEntry = DIR_ENTRY_ADDR(DirWithThumbnailPtrs, de); 1631 Tag = Get16u(DirEntry); 1632 if (Tag == TAG_THUMBNAIL_LENGTH){ 1633 // Set length to zero. 1634 if (Get16u(DirEntry+2) != FMT_ULONG){ 1635 // non standard format encoding. Can't do it. 1636 ErrNonfatal("Can't remove thumbnail", 0, 0); 1637 return 0; 1638 } 1639 Put32u(DirEntry+8, 0); 1640 } 1641 } 1642 } 1643 1644 // This is how far the non thumbnail data went. 1645 return ImageInfo.ThumbnailOffset+8; 1646 1647 } 1648 1649 1650 //-------------------------------------------------------------------------- 1651 // Convert exif time to Unix time structure 1652 //-------------------------------------------------------------------------- 1653 int Exif2tm(struct tm * timeptr, char * ExifTime) 1654 { 1655 int a; 1656 1657 timeptr->tm_wday = -1; 1658 1659 // Check for format: YYYY:MM:DD HH:MM:SS format. 1660 // Date and time normally separated by a space, but also seen a ':' there, so 1661 // skip the middle space with '%*c' so it can be any character. 1662 a = sscanf(ExifTime, "%d%*c%d%*c%d%*c%d:%d:%d", 1663 &timeptr->tm_year, &timeptr->tm_mon, &timeptr->tm_mday, 1664 &timeptr->tm_hour, &timeptr->tm_min, &timeptr->tm_sec); 1665 1666 1667 if (a == 6){ 1668 timeptr->tm_isdst = -1; 1669 timeptr->tm_mon -= 1; // Adjust for unix zero-based months 1670 timeptr->tm_year -= 1900; // Adjust for year starting at 1900 1671 return TRUE; // worked. 1672 } 1673 1674 return FALSE; // Wasn't in Exif date format. 1675 } 1676 1677 1678 //-------------------------------------------------------------------------- 1679 // Show the collected image info, displaying camera F-stop and shutter speed 1680 // in a consistent and legible fashion. 1681 //-------------------------------------------------------------------------- 1682 void ShowImageInfo(int ShowFileInfo) 1683 { 1684 if (ShowFileInfo){ 1685 printf("File name : %s\n",ImageInfo.FileName); 1686 printf("File size : %d bytes\n",ImageInfo.FileSize); 1687 1688 { 1689 char Temp[20]; 1690 FileTimeAsString(Temp); 1691 printf("File date : %s\n",Temp); 1692 } 1693 } 1694 1695 if (ImageInfo.CameraMake[0]){ 1696 printf("Camera make : %s\n",ImageInfo.CameraMake); 1697 printf("Camera model : %s\n",ImageInfo.CameraModel); 1698 } 1699 if (ImageInfo.DateTime[0]){ 1700 printf("Date/Time : %s\n",ImageInfo.DateTime); 1701 } 1702 printf("Resolution : %d x %d\n",ImageInfo.Width, ImageInfo.Height); 1703 1704 if (ImageInfo.Orientation > 1){ 1705 // Only print orientation if one was supplied, and if its not 1 (normal orientation) 1706 printf("Orientation : %s\n", OrientTab[ImageInfo.Orientation]); 1707 } 1708 1709 if (ImageInfo.IsColor == 0){ 1710 printf("Color/bw : Black and white\n"); 1711 } 1712 1713 if (ImageInfo.FlashUsed >= 0){ 1714 if (ImageInfo.FlashUsed & 1){ 1715 printf("Flash used : Yes"); 1716 switch (ImageInfo.FlashUsed){ 1717 case 0x5: printf(" (Strobe light not detected)"); break; 1718 case 0x7: printf(" (Strobe light detected) "); break; 1719 case 0x9: printf(" (manual)"); break; 1720 case 0xd: printf(" (manual, return light not detected)"); break; 1721 case 0xf: printf(" (manual, return light detected)"); break; 1722 case 0x19:printf(" (auto)"); break; 1723 case 0x1d:printf(" (auto, return light not detected)"); break; 1724 case 0x1f:printf(" (auto, return light detected)"); break; 1725 case 0x41:printf(" (red eye reduction mode)"); break; 1726 case 0x45:printf(" (red eye reduction mode return light not detected)"); break; 1727 case 0x47:printf(" (red eye reduction mode return light detected)"); break; 1728 case 0x49:printf(" (manual, red eye reduction mode)"); break; 1729 case 0x4d:printf(" (manual, red eye reduction mode, return light not detected)"); break; 1730 case 0x4f:printf(" (red eye reduction mode, return light detected)"); break; 1731 case 0x59:printf(" (auto, red eye reduction mode)"); break; 1732 case 0x5d:printf(" (auto, red eye reduction mode, return light not detected)"); break; 1733 case 0x5f:printf(" (auto, red eye reduction mode, return light detected)"); break; 1734 } 1735 }else{ 1736 printf("Flash used : No"); 1737 switch (ImageInfo.FlashUsed){ 1738 case 0x18:printf(" (auto)"); break; 1739 } 1740 } 1741 printf("\n"); 1742 } 1743 1744 1745 if (ImageInfo.FocalLength.num != 0 && ImageInfo.FocalLength.denom != 0) { 1746 printf("Focal length : %4.1fmm",(double)ImageInfo.FocalLength.num / ImageInfo.FocalLength.denom); 1747 if (ImageInfo.FocalLength35mmEquiv){ 1748 printf(" (35mm equivalent: %dmm)", ImageInfo.FocalLength35mmEquiv); 1749 } 1750 printf("\n"); 1751 } 1752 1753 if (ImageInfo.DigitalZoomRatio > 1){ 1754 // Digital zoom used. Shame on you! 1755 printf("Digital Zoom : %1.3fx\n", (double)ImageInfo.DigitalZoomRatio); 1756 } 1757 1758 if (ImageInfo.CCDWidth){ 1759 printf("CCD width : %4.2fmm\n",(double)ImageInfo.CCDWidth); 1760 } 1761 1762 if (ImageInfo.ExposureTime){ 1763 if (ImageInfo.ExposureTime < 0.010){ 1764 printf("Exposure time: %6.4f s ",(double)ImageInfo.ExposureTime); 1765 }else{ 1766 printf("Exposure time: %5.3f s ",(double)ImageInfo.ExposureTime); 1767 } 1768 if (ImageInfo.ExposureTime <= 0.5){ 1769 printf(" (1/%d)",(int)(0.5 + 1/ImageInfo.ExposureTime)); 1770 } 1771 printf("\n"); 1772 } 1773 if (ImageInfo.ApertureFNumber){ 1774 printf("Aperture : f/%3.1f\n",(double)ImageInfo.ApertureFNumber); 1775 } 1776 if (ImageInfo.Distance){ 1777 if (ImageInfo.Distance < 0){ 1778 printf("Focus dist. : Infinite\n"); 1779 }else{ 1780 printf("Focus dist. : %4.2fm\n",(double)ImageInfo.Distance); 1781 } 1782 } 1783 1784 if (ImageInfo.ISOequivalent){ 1785 printf("ISO equiv. : %2d\n",(int)ImageInfo.ISOequivalent); 1786 } 1787 1788 if (ImageInfo.ExposureBias){ 1789 // If exposure bias was specified, but set to zero, presumably its no bias at all, 1790 // so only show it if its nonzero. 1791 printf("Exposure bias: %4.2f\n",(double)ImageInfo.ExposureBias); 1792 } 1793 1794 switch(ImageInfo.Whitebalance) { 1795 case 1: 1796 printf("Whitebalance : Manual\n"); 1797 break; 1798 case 0: 1799 printf("Whitebalance : Auto\n"); 1800 break; 1801 } 1802 1803 //Quercus: 17-1-2004 Added LightSource, some cams return this, whitebalance or both 1804 switch(ImageInfo.LightSource) { 1805 case 1: 1806 printf("Light Source : Daylight\n"); 1807 break; 1808 case 2: 1809 printf("Light Source : Fluorescent\n"); 1810 break; 1811 case 3: 1812 printf("Light Source : Incandescent\n"); 1813 break; 1814 case 4: 1815 printf("Light Source : Flash\n"); 1816 break; 1817 case 9: 1818 printf("Light Source : Fine weather\n"); 1819 break; 1820 case 11: 1821 printf("Light Source : Shade\n"); 1822 break; 1823 default:; //Quercus: 17-1-2004 There are many more modes for this, check Exif2.2 specs 1824 // If it just says 'unknown' or we don't know it, then 1825 // don't bother showing it - it doesn't add any useful information. 1826 } 1827 1828 if (ImageInfo.MeteringMode){ // 05-jan-2001 vcs 1829 switch(ImageInfo.MeteringMode) { 1830 case 2: 1831 printf("Metering Mode: center weight\n"); 1832 break; 1833 case 3: 1834 printf("Metering Mode: spot\n"); 1835 break; 1836 case 5: 1837 printf("Metering Mode: matrix\n"); 1838 break; 1839 } 1840 } 1841 1842 if (ImageInfo.ExposureProgram){ // 05-jan-2001 vcs 1843 switch(ImageInfo.ExposureProgram) { 1844 case 1: 1845 printf("Exposure : Manual\n"); 1846 break; 1847 case 2: 1848 printf("Exposure : program (auto)\n"); 1849 break; 1850 case 3: 1851 printf("Exposure : aperture priority (semi-auto)\n"); 1852 break; 1853 case 4: 1854 printf("Exposure : shutter priority (semi-auto)\n"); 1855 break; 1856 case 5: 1857 printf("Exposure : Creative Program (based towards depth of field)\n"); 1858 break; 1859 case 6: 1860 printf("Exposure : Action program (based towards fast shutter speed)\n"); 1861 break; 1862 case 7: 1863 printf("Exposure : Portrait Mode\n"); 1864 break; 1865 case 8: 1866 printf("Exposure : LandscapeMode \n"); 1867 break; 1868 default: 1869 break; 1870 } 1871 } 1872 switch(ImageInfo.ExposureMode){ 1873 case 0: // Automatic (not worth cluttering up output for) 1874 break; 1875 case 1: printf("Exposure Mode: Manual\n"); 1876 break; 1877 case 2: printf("Exposure Mode: Auto bracketing\n"); 1878 break; 1879 } 1880 1881 if (ImageInfo.DistanceRange) { 1882 printf("Focus range : "); 1883 switch(ImageInfo.DistanceRange) { 1884 case 1: 1885 printf("macro"); 1886 break; 1887 case 2: 1888 printf("close"); 1889 break; 1890 case 3: 1891 printf("distant"); 1892 break; 1893 } 1894 printf("\n"); 1895 } 1896 1897 1898 1899 if (ImageInfo.Process != M_SOF0){ 1900 // don't show it if its the plain old boring 'baseline' process, but do 1901 // show it if its something else, like 'progressive' (used on web sometimes) 1902 int a; 1903 for (a=0;;a++){ 1904 if (a >= (int)PROCESS_TABLE_SIZE){ 1905 // ran off the end of the table. 1906 printf("Jpeg process : Unknown\n"); 1907 break; 1908 } 1909 if (ProcessTable[a].Tag == ImageInfo.Process){ 1910 printf("Jpeg process : %s\n",ProcessTable[a].Desc); 1911 break; 1912 } 1913 } 1914 } 1915 1916 if (ImageInfo.GpsInfoPresent){ 1917 printf("GPS Latitude : %s\n",ImageInfo.GpsLat); 1918 printf("GPS Longitude: %s\n",ImageInfo.GpsLong); 1919 if (ImageInfo.GpsAlt[0]) printf("GPS Altitude : %s\n",ImageInfo.GpsAlt); 1920 } 1921 1922 // Print the comment. Print 'Comment:' for each new line of comment. 1923 if (ImageInfo.Comments[0]){ 1924 int a,c; 1925 printf("Comment : "); 1926 if (!ImageInfo.CommentWidchars){ 1927 for (a=0;a<MAX_COMMENT_SIZE;a++){ 1928 c = ImageInfo.Comments[a]; 1929 if (c == '\0') break; 1930 if (c == '\n'){ 1931 // Do not start a new line if the string ends with a carriage return. 1932 if (ImageInfo.Comments[a+1] != '\0'){ 1933 printf("\nComment : "); 1934 }else{ 1935 printf("\n"); 1936 } 1937 }else{ 1938 putchar(c); 1939 } 1940 } 1941 printf("\n"); 1942 }else{ 1943 printf("%.*ls\n", ImageInfo.CommentWidchars, (wchar_t *)ImageInfo.Comments); 1944 } 1945 } 1946 if (ImageInfo.ThumbnailOffset){ 1947 printf("Map: %05d-%05d: Thumbnail\n",ImageInfo.ThumbnailOffset, ImageInfo.ThumbnailOffset+ImageInfo.ThumbnailSize); 1948 } else { 1949 printf("NO thumbnail"); 1950 } 1951 } 1952 1953 1954 //-------------------------------------------------------------------------- 1955 // Summarize highlights of image info on one line (suitable for grep-ing) 1956 //-------------------------------------------------------------------------- 1957 void ShowConciseImageInfo(void) 1958 { 1959 printf("\"%s\"",ImageInfo.FileName); 1960 1961 printf(" %dx%d",ImageInfo.Width, ImageInfo.Height); 1962 1963 if (ImageInfo.ExposureTime){ 1964 if (ImageInfo.ExposureTime <= 0.5){ 1965 printf(" (1/%d)",(int)(0.5 + 1/ImageInfo.ExposureTime)); 1966 }else{ 1967 printf(" (%1.1f)",ImageInfo.ExposureTime); 1968 } 1969 } 1970 1971 if (ImageInfo.ApertureFNumber){ 1972 printf(" f/%3.1f",(double)ImageInfo.ApertureFNumber); 1973 } 1974 1975 if (ImageInfo.FocalLength35mmEquiv){ 1976 printf(" f(35)=%dmm",ImageInfo.FocalLength35mmEquiv); 1977 } 1978 1979 if (ImageInfo.FlashUsed >= 0 && ImageInfo.FlashUsed & 1){ 1980 printf(" (flash)"); 1981 } 1982 1983 if (ImageInfo.IsColor == 0){ 1984 printf(" (bw)"); 1985 } 1986 1987 printf("\n"); 1988 } 1989
