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 // Process one of the nested EXIF directories. 466 //-------------------------------------------------------------------------- 467 static void ProcessExifDir(unsigned char * DirStart, unsigned char * OffsetBase, 468 unsigned ExifLength, int NestingLevel) 469 { 470 int de; 471 int a; 472 int NumDirEntries; 473 unsigned ThumbnailOffset = 0; 474 unsigned ThumbnailSize = 0; 475 char IndentString[25]; 476 477 printf("ProcessExifDir"); 478 if (NestingLevel > 4){ 479 ErrNonfatal("Maximum directory nesting exceeded (corrupt exif header)", 0,0); 480 return; 481 } 482 483 memset(IndentString, ' ', 25); 484 IndentString[NestingLevel * 4] = '\0'; 485 486 487 NumDirEntries = Get16u(DirStart); 488 #define DIR_ENTRY_ADDR(Start, Entry) (Start+2+12*(Entry)) 489 490 { 491 unsigned char * DirEnd; 492 DirEnd = DIR_ENTRY_ADDR(DirStart, NumDirEntries); 493 if (DirEnd+4 > (OffsetBase+ExifLength)){ 494 if (DirEnd+2 == OffsetBase+ExifLength || DirEnd == OffsetBase+ExifLength){ 495 // Version 1.3 of jhead would truncate a bit too much. 496 // This also caught later on as well. 497 }else{ 498 ErrNonfatal("Illegally sized exif subdirectory (%d entries)",NumDirEntries,0); 499 return; 500 } 501 } 502 if (DumpExifMap){ 503 printf("Map: %05d-%05d: Directory\n",(int)(DirStart-OffsetBase), (int)(DirEnd+4-OffsetBase)); 504 } 505 506 507 } 508 509 if (ShowTags){ 510 printf("(dir has %d entries)\n",NumDirEntries); 511 } 512 513 for (de=0;de<NumDirEntries;de++){ 514 int Tag, Format, Components; 515 unsigned char * ValuePtr; 516 int ByteCount; 517 unsigned char * DirEntry; 518 DirEntry = DIR_ENTRY_ADDR(DirStart, de); 519 520 Tag = Get16u(DirEntry); 521 Format = Get16u(DirEntry+2); 522 Components = Get32u(DirEntry+4); 523 524 if ((Format-1) >= NUM_FORMATS) { 525 // (-1) catches illegal zero case as unsigned underflows to positive large. 526 ErrNonfatal("Illegal number format %d for tag %04x", Format, Tag); 527 continue; 528 } 529 530 if ((unsigned)Components > 0x10000){ 531 ErrNonfatal("Illegal number of components %d for tag %04x", Components, Tag); 532 continue; 533 } 534 535 ByteCount = Components * BytesPerFormat[Format]; 536 537 if (ByteCount > 4){ 538 unsigned OffsetVal; 539 OffsetVal = Get32u(DirEntry+8); 540 // If its bigger than 4 bytes, the dir entry contains an offset. 541 if (OffsetVal+ByteCount > ExifLength){ 542 // Bogus pointer offset and / or bytecount value 543 ErrNonfatal("Illegal value pointer for tag %04x", Tag,0); 544 continue; 545 } 546 ValuePtr = OffsetBase+OffsetVal; 547 548 if (OffsetVal > ImageInfo.LargestExifOffset){ 549 ImageInfo.LargestExifOffset = OffsetVal; 550 } 551 552 if (DumpExifMap){ 553 printf("Map: %05d-%05d: Data for tag %04x\n",OffsetVal, OffsetVal+ByteCount, Tag); 554 } 555 }else{ 556 // 4 bytes or less and value is in the dir entry itself 557 ValuePtr = DirEntry+8; 558 } 559 560 if (Tag == TAG_MAKER_NOTE){ 561 if (ShowTags){ 562 printf("%s Maker note: ",IndentString); 563 } 564 ProcessMakerNote(ValuePtr, ByteCount, OffsetBase, ExifLength); 565 continue; 566 } 567 568 if (ShowTags){ 569 // Show tag name 570 for (a=0;;a++){ 571 if (a >= (int)TAG_TABLE_SIZE){ 572 printf("%s", IndentString); 573 printf(" Unknown Tag %04x Value = ", Tag); 574 break; 575 } 576 if (TagTable[a].Tag == Tag){ 577 printf("%s", IndentString); 578 printf(" %s = ",TagTable[a].Desc); 579 break; 580 } 581 } 582 583 // Show tag value. 584 switch(Format){ 585 case FMT_BYTE: 586 if(ByteCount>1){ 587 printf("%.*ls\n", ByteCount/2, (wchar_t *)ValuePtr); 588 }else{ 589 PrintFormatNumber(ValuePtr, Format, ByteCount); 590 printf("\n"); 591 } 592 break; 593 594 case FMT_UNDEFINED: 595 // Undefined is typically an ascii string. 596 597 case FMT_STRING: 598 // String arrays printed without function call (different from int arrays) 599 { 600 printf("\"%s\"", ValuePtr); 601 // int NoPrint = 0; 602 // printf("\""); 603 // for (a=0;a<ByteCount;a++){ 604 // if (ValuePtr[a] >= 32){ 605 // putchar(ValuePtr[a]); 606 // NoPrint = 0; 607 // }else{ 608 // // Avoiding indicating too many unprintable characters of proprietary 609 // // bits of binary information this program may not know how to parse. 610 // if (!NoPrint && a != ByteCount-1){ 611 // putchar('?'); 612 // NoPrint = 1; 613 // } 614 // } 615 // } 616 // printf("\"\n"); 617 } 618 break; 619 620 default: 621 // Handle arrays of numbers later (will there ever be?) 622 PrintFormatNumber(ValuePtr, Format, ByteCount); 623 printf("\n"); 624 } 625 } 626 627 // Extract useful components of tag 628 switch(Tag){ 629 630 case TAG_MAKE: 631 strncpy(ImageInfo.CameraMake, (char *)ValuePtr, ByteCount < 31 ? ByteCount : 31); 632 break; 633 634 case TAG_MODEL: 635 strncpy(ImageInfo.CameraModel, (char *)ValuePtr, ByteCount < 39 ? ByteCount : 39); 636 break; 637 638 case TAG_DATETIME_ORIGINAL: 639 // If we get a DATETIME_ORIGINAL, we use that one. 640 strncpy(ImageInfo.DateTime, (char *)ValuePtr, 19); 641 // Fallthru... 642 643 case TAG_DATETIME_DIGITIZED: 644 case TAG_DATETIME: 645 if (!isdigit(ImageInfo.DateTime[0])){ 646 // If we don't already have a DATETIME_ORIGINAL, use whatever 647 // time fields we may have. 648 strncpy(ImageInfo.DateTime, (char *)ValuePtr, 19); 649 } 650 651 if (ImageInfo.numDateTimeTags >= MAX_DATE_COPIES){ 652 ErrNonfatal("More than %d date fields! This is nuts", MAX_DATE_COPIES, 0); 653 break; 654 } 655 ImageInfo.DateTimeOffsets[ImageInfo.numDateTimeTags++] = 656 (char *)ValuePtr - (char *)OffsetBase; 657 break; 658 659 case TAG_WINXP_COMMENT: 660 if (ImageInfo.Comments[0]){ // We already have a jpeg comment. 661 // Already have a comment (probably windows comment), skip this one. 662 if (ShowTags) printf("Windows XP commend and other comment in header\n"); 663 break; // Already have a windows comment, skip this one. 664 } 665 666 if (ByteCount > 1){ 667 if (ByteCount > MAX_COMMENT_SIZE) ByteCount = MAX_COMMENT_SIZE; 668 memcpy(ImageInfo.Comments, ValuePtr, ByteCount); 669 ImageInfo.CommentWidchars = ByteCount/2; 670 } 671 break; 672 673 case TAG_USERCOMMENT: 674 if (ImageInfo.Comments[0]){ // We already have a jpeg comment. 675 // Already have a comment (probably windows comment), skip this one. 676 if (ShowTags) printf("Multiple comments in exif header\n"); 677 break; // Already have a windows comment, skip this one. 678 } 679 680 // Comment is often padded with trailing spaces. Remove these first. 681 for (a=ByteCount;;){ 682 a--; 683 if ((ValuePtr)[a] == ' '){ 684 (ValuePtr)[a] = '\0'; 685 }else{ 686 break; 687 } 688 if (a == 0) break; 689 } 690 691 // Copy the comment 692 if (memcmp(ValuePtr, "ASCII",5) == 0){ 693 for (a=5;a<10;a++){ 694 int c; 695 c = (ValuePtr)[a]; 696 if (c != '\0' && c != ' '){ 697 strncpy(ImageInfo.Comments, (char *)ValuePtr+a, 199); 698 break; 699 } 700 } 701 }else{ 702 strncpy(ImageInfo.Comments, (char *)ValuePtr, MAX_COMMENT_SIZE-1); 703 } 704 break; 705 706 case TAG_FNUMBER: 707 // Simplest way of expressing aperture, so I trust it the most. 708 // (overwrite previously computd value if there is one) 709 ImageInfo.ApertureFNumber = (float)ConvertAnyFormat(ValuePtr, Format); 710 break; 711 712 case TAG_APERTURE: 713 case TAG_MAXAPERTURE: 714 // More relevant info always comes earlier, so only use this field if we don't 715 // have appropriate aperture information yet. 716 if (ImageInfo.ApertureFNumber == 0){ 717 ImageInfo.ApertureFNumber 718 = (float)exp(ConvertAnyFormat(ValuePtr, Format)*log(2)*0.5); 719 } 720 break; 721 722 case TAG_FOCALLENGTH: 723 // Nice digital cameras actually save the focal length as a function 724 // of how farthey are zoomed in. 725 ImageInfo.FocalLength.num = Get32u(ValuePtr); 726 ImageInfo.FocalLength.denom = Get32u(4+(char *)ValuePtr); 727 break; 728 729 case TAG_SUBJECT_DISTANCE: 730 // Inidcates the distacne the autofocus camera is focused to. 731 // Tends to be less accurate as distance increases. 732 ImageInfo.Distance = (float)ConvertAnyFormat(ValuePtr, Format); 733 break; 734 735 case TAG_EXPOSURETIME: 736 // Simplest way of expressing exposure time, so I trust it most. 737 // (overwrite previously computd value if there is one) 738 ImageInfo.ExposureTime = (float)ConvertAnyFormat(ValuePtr, Format); 739 break; 740 741 case TAG_SHUTTERSPEED: 742 // More complicated way of expressing exposure time, so only use 743 // this value if we don't already have it from somewhere else. 744 if (ImageInfo.ExposureTime == 0){ 745 ImageInfo.ExposureTime 746 = (float)(1/exp(ConvertAnyFormat(ValuePtr, Format)*log(2))); 747 } 748 break; 749 750 751 case TAG_FLASH: 752 ImageInfo.FlashUsed=(int)ConvertAnyFormat(ValuePtr, Format); 753 break; 754 755 case TAG_ORIENTATION: 756 if (NumOrientations >= 2){ 757 // Can have another orientation tag for the thumbnail, but if there's 758 // a third one, things are stringae. 759 ErrNonfatal("More than two orientation tags!",0,0); 760 break; 761 } 762 OrientationPtr[NumOrientations] = ValuePtr; 763 OrientationNumFormat[NumOrientations] = Format; 764 if (NumOrientations == 0){ 765 ImageInfo.Orientation = (int)ConvertAnyFormat(ValuePtr, Format); 766 } 767 if (ImageInfo.Orientation < 0 || ImageInfo.Orientation > 8){ 768 ErrNonfatal("Undefined rotation value %d", ImageInfo.Orientation, 0); 769 ImageInfo.Orientation = 0; 770 } 771 NumOrientations += 1; 772 break; 773 774 case TAG_EXIF_IMAGELENGTH: 775 case TAG_EXIF_IMAGEWIDTH: 776 // Use largest of height and width to deal with images that have been 777 // rotated to portrait format. 778 a = (int)ConvertAnyFormat(ValuePtr, Format); 779 if (ExifImageWidth < a) ExifImageWidth = a; 780 break; 781 782 case TAG_FOCAL_PLANE_XRES: 783 FocalplaneXRes = ConvertAnyFormat(ValuePtr, Format); 784 break; 785 786 case TAG_FOCAL_PLANE_UNITS: 787 switch((int)ConvertAnyFormat(ValuePtr, Format)){ 788 case 1: FocalplaneUnits = 25.4; break; // inch 789 case 2: 790 // According to the information I was using, 2 means meters. 791 // But looking at the Cannon powershot's files, inches is the only 792 // sensible value. 793 FocalplaneUnits = 25.4; 794 break; 795 796 case 3: FocalplaneUnits = 10; break; // centimeter 797 case 4: FocalplaneUnits = 1; break; // millimeter 798 case 5: FocalplaneUnits = .001; break; // micrometer 799 } 800 break; 801 802 case TAG_EXPOSURE_BIAS: 803 ImageInfo.ExposureBias = (float)ConvertAnyFormat(ValuePtr, Format); 804 break; 805 806 case TAG_WHITEBALANCE: 807 ImageInfo.Whitebalance = (int)ConvertAnyFormat(ValuePtr, Format); 808 break; 809 810 case TAG_LIGHT_SOURCE: 811 ImageInfo.LightSource = (int)ConvertAnyFormat(ValuePtr, Format); 812 break; 813 814 case TAG_METERING_MODE: 815 ImageInfo.MeteringMode = (int)ConvertAnyFormat(ValuePtr, Format); 816 break; 817 818 case TAG_EXPOSURE_PROGRAM: 819 ImageInfo.ExposureProgram = (int)ConvertAnyFormat(ValuePtr, Format); 820 break; 821 822 case TAG_EXPOSURE_INDEX: 823 if (ImageInfo.ISOequivalent == 0){ 824 // Exposure index and ISO equivalent are often used interchangeably, 825 // so we will do the same in jhead. 826 // http://photography.about.com/library/glossary/bldef_ei.htm 827 ImageInfo.ISOequivalent = (int)ConvertAnyFormat(ValuePtr, Format); 828 } 829 break; 830 831 case TAG_EXPOSURE_MODE: 832 ImageInfo.ExposureMode = (int)ConvertAnyFormat(ValuePtr, Format); 833 break; 834 835 case TAG_ISO_EQUIVALENT: 836 ImageInfo.ISOequivalent = (int)ConvertAnyFormat(ValuePtr, Format); 837 if ( ImageInfo.ISOequivalent < 50 ){ 838 // Fixes strange encoding on some older digicams. 839 ImageInfo.ISOequivalent *= 200; 840 } 841 break; 842 843 case TAG_DIGITALZOOMRATIO: 844 ImageInfo.DigitalZoomRatio = (float)ConvertAnyFormat(ValuePtr, Format); 845 break; 846 847 case TAG_THUMBNAIL_OFFSET: 848 ThumbnailOffset = (unsigned)ConvertAnyFormat(ValuePtr, Format); 849 DirWithThumbnailPtrs = DirStart; 850 break; 851 852 case TAG_THUMBNAIL_LENGTH: 853 ThumbnailSize = (unsigned)ConvertAnyFormat(ValuePtr, Format); 854 ImageInfo.ThumbnailSizeOffset = ValuePtr-OffsetBase; 855 break; 856 857 case TAG_EXIF_OFFSET: 858 if (ShowTags) printf("%s Exif Dir:",IndentString); 859 860 case TAG_INTEROP_OFFSET: 861 if (Tag == TAG_INTEROP_OFFSET && ShowTags) printf("%s Interop Dir:",IndentString); 862 { 863 unsigned char * SubdirStart; 864 SubdirStart = OffsetBase + Get32u(ValuePtr); 865 if (SubdirStart < OffsetBase || SubdirStart > OffsetBase+ExifLength){ 866 ErrNonfatal("Illegal exif or interop ofset directory link",0,0); 867 }else{ 868 ProcessExifDir(SubdirStart, OffsetBase, ExifLength, NestingLevel+1); 869 } 870 continue; 871 } 872 break; 873 874 case TAG_GPSINFO: 875 if (ShowTags) printf("%s GPS info dir:",IndentString); 876 { 877 unsigned char * SubdirStart; 878 SubdirStart = OffsetBase + Get32u(ValuePtr); 879 if (SubdirStart < OffsetBase || SubdirStart > OffsetBase+ExifLength){ 880 ErrNonfatal("Illegal GPS directory link",0,0); 881 }else{ 882 ProcessGpsInfo(SubdirStart, ByteCount, OffsetBase, ExifLength); 883 } 884 continue; 885 } 886 break; 887 888 case TAG_FOCALLENGTH_35MM: 889 // The focal length equivalent 35 mm is a 2.2 tag (defined as of April 2002) 890 // if its present, use it to compute equivalent focal length instead of 891 // computing it from sensor geometry and actual focal length. 892 ImageInfo.FocalLength35mmEquiv = (unsigned)ConvertAnyFormat(ValuePtr, Format); 893 break; 894 895 case TAG_DISTANCE_RANGE: 896 // Three possible standard values: 897 // 1 = macro, 2 = close, 3 = distant 898 ImageInfo.DistanceRange = (int)ConvertAnyFormat(ValuePtr, Format); 899 break; 900 } 901 } 902 903 904 { 905 // In addition to linking to subdirectories via exif tags, 906 // there's also a potential link to another directory at the end of each 907 // directory. this has got to be the result of a committee! 908 unsigned char * SubdirStart; 909 unsigned Offset; 910 911 if (DIR_ENTRY_ADDR(DirStart, NumDirEntries) + 4 <= OffsetBase+ExifLength){ 912 printf("DirStart %d offset from dirstart %d", (int)DirStart, 2+12*NumDirEntries); 913 Offset = Get32u(DirStart+2+12*NumDirEntries); 914 if (Offset){ 915 SubdirStart = OffsetBase + Offset; 916 if (SubdirStart > OffsetBase+ExifLength || SubdirStart < OffsetBase){ 917 printf("SubdirStart %d OffsetBase %d ExifLength %d Offset %d", 918 (int)SubdirStart, (int)OffsetBase, ExifLength, Offset); 919 if (SubdirStart > OffsetBase && SubdirStart < OffsetBase+ExifLength+20){ 920 // Jhead 1.3 or earlier would crop the whole directory! 921 // As Jhead produces this form of format incorrectness, 922 // I'll just let it pass silently 923 if (ShowTags) printf("Thumbnail removed with Jhead 1.3 or earlier\n"); 924 }else{ 925 ErrNonfatal("Illegal subdirectory link",0,0); 926 } 927 }else{ 928 if (SubdirStart <= OffsetBase+ExifLength){ 929 if (ShowTags) printf("%s Continued directory ",IndentString); 930 ProcessExifDir(SubdirStart, OffsetBase, ExifLength, NestingLevel+1); 931 } 932 } 933 if (Offset > ImageInfo.LargestExifOffset){ 934 ImageInfo.LargestExifOffset = Offset; 935 } 936 } 937 }else{ 938 // The exif header ends before the last next directory pointer. 939 } 940 } 941 942 if (ThumbnailOffset){ 943 ImageInfo.ThumbnailAtEnd = FALSE; 944 945 if (DumpExifMap){ 946 printf("Map: %05d-%05d: Thumbnail\n",ThumbnailOffset, ThumbnailOffset+ThumbnailSize); 947 } 948 949 if (ThumbnailOffset <= ExifLength){ 950 if (ThumbnailSize > ExifLength-ThumbnailOffset){ 951 // If thumbnail extends past exif header, only save the part that 952 // actually exists. Canon's EOS viewer utility will do this - the 953 // thumbnail extracts ok with this hack. 954 ThumbnailSize = ExifLength-ThumbnailOffset; 955 if (ShowTags) printf("Thumbnail incorrectly placed in header\n"); 956 957 } 958 // The thumbnail pointer appears to be valid. Store it. 959 ImageInfo.ThumbnailOffset = ThumbnailOffset; 960 ImageInfo.ThumbnailSize = ThumbnailSize; 961 962 if (ShowTags){ 963 printf("Thumbnail size: %d bytes\n",ThumbnailSize); 964 } 965 } 966 } 967 printf("returning from ProcessExifDir"); 968 } 969 970 971 //-------------------------------------------------------------------------- 972 // Process a EXIF marker 973 // Describes all the drivel that most digital cameras include... 974 //-------------------------------------------------------------------------- 975 void process_EXIF (unsigned char * ExifSection, unsigned int length) 976 { 977 int FirstOffset; 978 979 FocalplaneXRes = 0; 980 FocalplaneUnits = 0; 981 ExifImageWidth = 0; 982 NumOrientations = 0; 983 984 if (ShowTags){ 985 printf("Exif header %d bytes long\n",length); 986 } 987 988 { // Check the EXIF header component 989 static uchar ExifHeader[] = "Exif\0\0"; 990 if (memcmp(ExifSection+2, ExifHeader,6)){ 991 ErrNonfatal("Incorrect Exif header",0,0); 992 return; 993 } 994 } 995 996 if (memcmp(ExifSection+8,"II",2) == 0){ 997 if (ShowTags) printf("Exif section in Intel order\n"); 998 MotorolaOrder = 0; 999 }else{ 1000 if (memcmp(ExifSection+8,"MM",2) == 0){ 1001 if (ShowTags) printf("Exif section in Motorola order\n"); 1002 MotorolaOrder = 1; 1003 }else{ 1004 ErrNonfatal("Invalid Exif alignment marker.",0,0); 1005 return; 1006 } 1007 } 1008 1009 // Check the next value for correctness. 1010 if (Get16u(ExifSection+10) != 0x2a){ 1011 ErrNonfatal("Invalid Exif start (1)",0,0); 1012 return; 1013 } 1014 1015 FirstOffset = Get32u(ExifSection+12); 1016 if (FirstOffset < 8 || FirstOffset > 16){ 1017 // Usually set to 8, but other values valid too. 1018 ErrNonfatal("Suspicious offset of first IFD value",0,0); 1019 return; 1020 } 1021 1022 DirWithThumbnailPtrs = NULL; 1023 1024 1025 // First directory starts 16 bytes in. All offset are relative to 8 bytes in. 1026 ProcessExifDir(ExifSection+8+FirstOffset, ExifSection+8, length-8, 0); 1027 1028 ImageInfo.ThumbnailAtEnd = ImageInfo.ThumbnailOffset >= ImageInfo.LargestExifOffset ? TRUE : FALSE; 1029 #ifdef SUPERDEBUG 1030 printf("Thumbnail %s end", (ImageInfo.ThumbnailAtEnd ? "at" : "NOT at")); 1031 #endif 1032 if (DumpExifMap){ 1033 unsigned a,b; 1034 printf("Map: %05d- End of exif\n",length-8); 1035 // for (a=0;a<length-8;a+= 10){ 1036 // printf("Map: %05d ",a); 1037 // for (b=0;b<10;b++) printf(" %02x",*(ExifSection+8+a+b)); 1038 // printf("\n"); 1039 // } 1040 for (a = 0; a < length - 8; ++a) { 1041 unsigned char c = *(ExifSection+8+a); 1042 unsigned pc = isprint(c) ? c : ' '; 1043 printf("Map: %4d %02x %c", a, c, pc); 1044 } 1045 } 1046 1047 1048 // Compute the CCD width, in millimeters. 1049 if (FocalplaneXRes != 0){ 1050 // Note: With some cameras, its not possible to compute this correctly because 1051 // they don't adjust the indicated focal plane resolution units when using less 1052 // than maximum resolution, so the CCDWidth value comes out too small. Nothing 1053 // that Jhad can do about it - its a camera problem. 1054 ImageInfo.CCDWidth = (float)(ExifImageWidth * FocalplaneUnits / FocalplaneXRes); 1055 1056 if (ImageInfo.FocalLength.num != 0 && ImageInfo.FocalLength.denom != 0 1057 && ImageInfo.FocalLength35mmEquiv == 0){ 1058 // Compute 35 mm equivalent focal length based on sensor geometry if we haven't 1059 // already got it explicitly from a tag. 1060 ImageInfo.FocalLength35mmEquiv = (int)( 1061 (double)ImageInfo.FocalLength.num / ImageInfo.FocalLength.denom 1062 / ImageInfo.CCDWidth * 36 + 0.5); 1063 } 1064 } 1065 } 1066 1067 static const TagTable_t* TagToTagTableEntry(unsigned short tag) 1068 { 1069 unsigned int i; 1070 for (i = 0; i < TAG_TABLE_SIZE; i++) { 1071 if (TagTable[i].Tag == tag) { 1072 printf("found tag %d", tag); 1073 int format = TagTable[i].Format; 1074 if (format == 0) { 1075 printf("tag %s format not defined ***** YOU MUST ADD THE FORMAT TO THE TagTable in exif.c!!!!", TagTable[i].Desc); 1076 return NULL; 1077 } 1078 return &TagTable[i]; 1079 } 1080 } 1081 printf("tag %d NOT FOUND", tag); 1082 return NULL; 1083 } 1084 1085 static void writeExifTagAndData(int tag, 1086 int format, 1087 long components, 1088 long value, 1089 int valueInString, 1090 char* Buffer, 1091 int* DirIndex, 1092 int* DataWriteIndex) { 1093 void* componentsPosition = NULL; // for saving component position 1094 1095 Put16u(Buffer+ (*DirIndex), tag); // Tag 1096 Put16u(Buffer+(*DirIndex) + 2, format); // Format 1097 if (format == FMT_STRING && components == -1) { 1098 components = strlen((char*)value) + 1; // account for null terminator 1099 if (components & 1) ++components; // no odd lengths 1100 } 1101 if (format == FMT_UNDEFINED && components == -1) { 1102 // check if this UNDEFINED format is actually ASCII (as it usually is) 1103 // if so, we can calculate the size 1104 if(memcmp((char*)value, ExifAsciiPrefix, sizeof(ExifAsciiPrefix)) == 0) { 1105 components = sizeof(ExifAsciiPrefix) + 1106 strlen((char*)value + sizeof(ExifAsciiPrefix)) + 1; 1107 if (components & 1) ++components; // no odd lengths 1108 } 1109 } 1110 Put32u(Buffer+(*DirIndex) + 4, components); // Components 1111 componentsPosition = Buffer+(*DirIndex) + 4; // components # can change for lists 1112 printf("# components: %ld", components); 1113 if (format == FMT_STRING) { 1114 // short strings can fit right in the long, otherwise have to 1115 // go in the data area 1116 if (components <= 4) { 1117 strcpy(Buffer+(*DirIndex) + 8, (char*)value); 1118 } else { 1119 Put32u(Buffer+(*DirIndex) + 8, (*DataWriteIndex)-8); // Pointer 1120 printf("copying value %s to %d", (char*)value, (*DataWriteIndex)); 1121 strncpy(Buffer+(*DataWriteIndex), (char*)value, components); 1122 (*DataWriteIndex) += components; 1123 } 1124 } else if ((format == FMT_UNDEFINED) && 1125 (memcmp((char*)value, ExifAsciiPrefix, sizeof(ExifAsciiPrefix)) == 0)) { 1126 // short strings can fit right in the long, otherwise have to 1127 // go in the data area 1128 if (components <= 4) { 1129 memcpy(Buffer+(*DirIndex) + 8, (char*)value, components); 1130 } else { 1131 Put32u(Buffer+(*DirIndex) + 8, (*DataWriteIndex)-8); // Pointer 1132 printf("copying %s to %d", (char*)value + sizeof(ExifAsciiPrefix), (*DataWriteIndex)); 1133 memcpy(Buffer+(*DataWriteIndex), (char*)value, components); 1134 (*DataWriteIndex) += components; 1135 } 1136 } else if (!valueInString) { 1137 Put32u(Buffer+(*DirIndex) + 8, value); // Value 1138 } else { 1139 Put32u(Buffer+(*DirIndex) + 8, (*DataWriteIndex)-8); // Pointer 1140 char* curElement = strtok((char*)value, ","); 1141 int i; 1142 1143 // (components == -1) Need to handle lists with unknown length too 1144 for (i = 0; ((i < components) || (components == -1)) && curElement != NULL; i++) { 1145 #ifdef SUPERDEBUG 1146 printf("processing component %s format %s", curElement, formatStr(format)); 1147 #endif 1148 // elements are separated by commas 1149 if (format == FMT_URATIONAL) { 1150 char* separator = strchr(curElement, '/'); 1151 if (separator) { 1152 unsigned int numerator = atoi(curElement); 1153 unsigned int denominator = atoi(separator + 1); 1154 Put32u(Buffer+(*DataWriteIndex), numerator); 1155 Put32u(Buffer+(*DataWriteIndex) + 4, denominator); 1156 (*DataWriteIndex) += 8; 1157 } 1158 } else if (format == FMT_SRATIONAL) { 1159 char* separator = strchr(curElement, '/'); 1160 if (separator) { 1161 int numerator = atoi(curElement); 1162 int denominator = atoi(separator + 1); 1163 Put32u(Buffer+(*DataWriteIndex), numerator); 1164 Put32u(Buffer+(*DataWriteIndex) + 4, denominator); 1165 (*DataWriteIndex) += 8; 1166 } 1167 } else if ((components == -1) && ((format == FMT_USHORT) || (format == FMT_SSHORT))) { 1168 // variable components need to go into data write area 1169 value = atoi(curElement); 1170 Put16u(Buffer+(*DataWriteIndex), value); 1171 (*DataWriteIndex) += 4; 1172 } else { 1173 // TODO: doesn't handle multiple components yet -- if more than one, have to put in data write area. 1174 value = atoi(curElement); 1175 Put32u(Buffer+(*DirIndex) + 8, value); // Value 1176 } 1177 curElement = strtok(NULL, ","); 1178 } 1179 if (components == -1) Put32u(componentsPosition, i); // update component # for unknowns 1180 } 1181 (*DirIndex) += 12; 1182 } 1183 1184 #ifdef SUPERDEBUG 1185 char* formatStr(int format) { 1186 switch (format) { 1187 case FMT_BYTE: return "FMT_BYTE"; break; 1188 case FMT_STRING: return "FMT_STRING"; break; 1189 case FMT_USHORT: return "FMT_USHORT"; break; 1190 case FMT_ULONG: return "FMT_ULONG"; break; 1191 case FMT_URATIONAL: return "FMT_URATIONAL"; break; 1192 case FMT_SBYTE: return "FMT_SBYTE"; break; 1193 case FMT_UNDEFINED: return "FMT_UNDEFINED"; break; 1194 case FMT_SSHORT: return "FMT_SSHORT"; break; 1195 case FMT_SLONG: return "FMT_SLONG"; break; 1196 case FMT_SRATIONAL: return "FMT_SRATIONAL"; break; 1197 case FMT_SINGLE: return "FMT_SINGLE"; break; 1198 case FMT_DOUBLE: return "FMT_SINGLE"; break; 1199 default: return "UNKNOWN"; 1200 } 1201 } 1202 #endif 1203 1204 //-------------------------------------------------------------------------- 1205 // Create minimal exif header - just date and thumbnail pointers, 1206 // so that date and thumbnail may be filled later. 1207 //-------------------------------------------------------------------------- 1208 static void create_EXIF_internal(ExifElement_t* elements, int exifTagCount, int gpsTagCount, int hasDateTimeTag, char* Buffer) 1209 { 1210 unsigned short NumEntries; 1211 int DataWriteIndex; 1212 int DirIndex; 1213 int DirExifLink = 0; 1214 1215 #ifdef SUPERDEBUG 1216 ALOGE("create_EXIF %d exif elements, %d gps elements", exifTagCount, gpsTagCount); 1217 #endif 1218 1219 MotorolaOrder = 0; 1220 1221 memcpy(Buffer+2, "Exif\0\0II",8); 1222 Put16u(Buffer+10, 0x2a); 1223 1224 DataWriteIndex = 16; 1225 Put32u(Buffer+12, DataWriteIndex-8); // first IFD offset. Means start 16 bytes in. 1226 1227 { 1228 DirIndex = DataWriteIndex; 1229 NumEntries = 1 + exifTagCount; // the extra is the thumbnail 1230 if (gpsTagCount) { 1231 ++NumEntries; // allow for the GPS info tag 1232 } 1233 if (!hasDateTimeTag) { 1234 // We have to write extra date time tag. The entry number should be 1235 // adjusted. 1236 ++NumEntries; 1237 } 1238 DataWriteIndex += 2 + NumEntries*12 + 4; 1239 1240 Put16u(Buffer+DirIndex, NumEntries); // Number of entries 1241 DirIndex += 2; 1242 1243 // Entries go here... 1244 if (!hasDateTimeTag) { 1245 // Date/time entry 1246 char* dateTime = NULL; 1247 char dateBuf[20]; 1248 if (ImageInfo.numDateTimeTags) { 1249 // If we had a pre-existing exif header, use time from that. 1250 dateTime = ImageInfo.DateTime; 1251 } else { 1252 // Oterwise, use the file's timestamp. 1253 FileTimeAsString(dateBuf); 1254 dateTime = dateBuf; 1255 } 1256 writeExifTagAndData(TAG_DATETIME, 1257 FMT_STRING, 1258 20, 1259 (long)(char*)dateBuf, 1260 FALSE, 1261 Buffer, 1262 &DirIndex, 1263 &DataWriteIndex); 1264 1265 } 1266 if (exifTagCount > 0) { 1267 int i; 1268 for (i = 0; i < exifTagCount + gpsTagCount; i++) { 1269 if (elements[i].GpsTag) { 1270 continue; 1271 } 1272 const TagTable_t* entry = TagToTagTableEntry(elements[i].Tag); 1273 if (entry == NULL) { 1274 continue; 1275 } 1276 #ifdef SUPERDEBUG 1277 ALOGE("create_EXIF saving tag %x value \"%s\"",elements[i].Tag, elements[i].Value); 1278 #endif 1279 writeExifTagAndData(elements[i].Tag, 1280 entry->Format, 1281 entry->DataLength, 1282 (long)elements[i].Value, 1283 TRUE, 1284 Buffer, 1285 &DirIndex, 1286 &DataWriteIndex); 1287 } 1288 1289 if (gpsTagCount) { 1290 // Link to gps dir entry 1291 writeExifTagAndData(TAG_GPSINFO, 1292 FMT_ULONG, 1293 1, 1294 DataWriteIndex-8, 1295 FALSE, 1296 Buffer, 1297 &DirIndex, 1298 &DataWriteIndex); 1299 } 1300 1301 // Link to exif dir entry 1302 int exifDirPtr = DataWriteIndex-8; 1303 if (gpsTagCount) { 1304 exifDirPtr += 2 + gpsTagCount*12 + 4; 1305 } 1306 DirExifLink = DirIndex; 1307 writeExifTagAndData(TAG_EXIF_OFFSET, 1308 FMT_ULONG, 1309 1, 1310 exifDirPtr, 1311 FALSE, 1312 Buffer, 1313 &DirIndex, 1314 &DataWriteIndex); 1315 } 1316 1317 // End of directory - contains optional link to continued directory. 1318 Put32u(Buffer+DirIndex, 0); 1319 printf("Ending Exif section DirIndex = %d DataWriteIndex %d", DirIndex, DataWriteIndex); 1320 } 1321 1322 1323 // GPS Section 1324 if (gpsTagCount) { 1325 DirIndex = DataWriteIndex; 1326 printf("Starting GPS section DirIndex = %d", DirIndex); 1327 NumEntries = gpsTagCount; 1328 DataWriteIndex += 2 + NumEntries*12 + 4; 1329 1330 Put16u(Buffer+DirIndex, NumEntries); // Number of entries 1331 DirIndex += 2; 1332 { 1333 int i; 1334 for (i = 0; i < exifTagCount + gpsTagCount; i++) { 1335 if (!elements[i].GpsTag) { 1336 continue; 1337 } 1338 const TagTable_t* entry = GpsTagToTagTableEntry(elements[i].Tag); 1339 if (entry == NULL) { 1340 continue; 1341 } 1342 #ifdef SUPERDEBUG 1343 ALOGE("create_EXIF saving GPS tag %x value \"%s\"",elements[i].Tag, elements[i].Value); 1344 #endif 1345 writeExifTagAndData(elements[i].Tag, 1346 entry->Format, 1347 entry->DataLength, 1348 (long)elements[i].Value, 1349 TRUE, 1350 Buffer, 1351 &DirIndex, 1352 &DataWriteIndex); 1353 } 1354 } 1355 1356 // End of directory - contains optional link to continued directory. 1357 Put32u(Buffer+DirIndex, 0); 1358 printf("Ending GPS section DirIndex = %d DataWriteIndex %d", DirIndex, DataWriteIndex); 1359 } 1360 1361 { 1362 // Overwriting TAG_EXIF_OFFSET which links to this directory 1363 Put32u(Buffer+DirExifLink+8, DataWriteIndex-8); 1364 1365 printf("Starting Thumbnail section DirIndex = %d", DirIndex); 1366 DirIndex = DataWriteIndex; 1367 NumEntries = 2; 1368 DataWriteIndex += 2 + NumEntries*12 + 4; 1369 1370 Put16u(Buffer+DirIndex, NumEntries); // Number of entries 1371 DirIndex += 2; 1372 { 1373 // Link to exif dir entry 1374 writeExifTagAndData(TAG_THUMBNAIL_OFFSET, 1375 FMT_ULONG, 1376 1, 1377 DataWriteIndex-8, 1378 FALSE, 1379 Buffer, 1380 &DirIndex, 1381 &DataWriteIndex); 1382 } 1383 1384 { 1385 // Link to exif dir entry 1386 writeExifTagAndData(TAG_THUMBNAIL_LENGTH, 1387 FMT_ULONG, 1388 1, 1389 0, 1390 FALSE, 1391 Buffer, 1392 &DirIndex, 1393 &DataWriteIndex); 1394 } 1395 1396 // End of directory - contains optional link to continued directory. 1397 Put32u(Buffer+DirIndex, 0); 1398 printf("Ending Thumbnail section DirIndex = %d DataWriteIndex %d", DirIndex, DataWriteIndex); 1399 } 1400 1401 1402 Buffer[0] = (unsigned char)(DataWriteIndex >> 8); 1403 Buffer[1] = (unsigned char)DataWriteIndex; 1404 1405 // Remove old exif section, if there was one. 1406 RemoveSectionType(M_EXIF); 1407 1408 { 1409 // Sections need malloced buffers, so do that now, especially because 1410 // we now know how big it needs to be allocated. 1411 unsigned char * NewBuf = malloc(DataWriteIndex); 1412 if (NewBuf == NULL){ 1413 ErrFatal("Could not allocate memory"); 1414 } 1415 memcpy(NewBuf, Buffer, DataWriteIndex); 1416 1417 CreateSection(M_EXIF, NewBuf, DataWriteIndex); 1418 1419 // Re-parse new exif section, now that its in place 1420 // otherwise, we risk touching data that has already been freed. 1421 process_EXIF(NewBuf, DataWriteIndex); 1422 } 1423 } 1424 1425 void create_EXIF(ExifElement_t* elements, int exifTagCount, int gpsTagCount, int hasDateTimeTag) 1426 { 1427 // It is hard to calculate exact necessary size for editing the exif 1428 // header dynamically, so we are using the maximum size of EXIF, 64K 1429 const int EXIF_MAX_SIZE = 1024*64; 1430 char* Buffer = malloc(EXIF_MAX_SIZE); 1431 1432 if (Buffer != NULL) { 1433 create_EXIF_internal(elements, exifTagCount, gpsTagCount, hasDateTimeTag, Buffer); 1434 free(Buffer); 1435 } else { 1436 ErrFatal("Could not allocate memory"); 1437 } 1438 } 1439 1440 //-------------------------------------------------------------------------- 1441 // Cler the rotation tag in the exif header to 1. 1442 //-------------------------------------------------------------------------- 1443 const char * ClearOrientation(void) 1444 { 1445 int a; 1446 if (NumOrientations == 0) return NULL; 1447 1448 for (a=0;a<NumOrientations;a++){ 1449 switch(OrientationNumFormat[a]){ 1450 case FMT_SBYTE: 1451 case FMT_BYTE: 1452 *(uchar *)(OrientationPtr[a]) = 1; 1453 break; 1454 1455 case FMT_USHORT: 1456 Put16u(OrientationPtr[a], 1); 1457 break; 1458 1459 case FMT_ULONG: 1460 case FMT_SLONG: 1461 memset(OrientationPtr, 0, 4); 1462 // Can't be bothered to write generic Put32 if I only use it once. 1463 if (MotorolaOrder){ 1464 ((uchar *)OrientationPtr[a])[3] = 1; 1465 }else{ 1466 ((uchar *)OrientationPtr[a])[0] = 1; 1467 } 1468 break; 1469 1470 default: 1471 return NULL; 1472 } 1473 } 1474 1475 return OrientTab[ImageInfo.Orientation]; 1476 } 1477 1478 1479 1480 //-------------------------------------------------------------------------- 1481 // Remove thumbnail out of the exif image. 1482 //-------------------------------------------------------------------------- 1483 int RemoveThumbnail(unsigned char * ExifSection) 1484 { 1485 if (!DirWithThumbnailPtrs || 1486 ImageInfo.ThumbnailOffset == 0 || 1487 ImageInfo.ThumbnailSize == 0){ 1488 // No thumbnail, or already deleted it. 1489 return 0; 1490 } 1491 if (ImageInfo.ThumbnailAtEnd == FALSE){ 1492 ErrNonfatal("Thumbnail is not at end of header, can't chop it off", 0, 0); 1493 return 0; 1494 } 1495 1496 { 1497 int de; 1498 int NumDirEntries; 1499 NumDirEntries = Get16u(DirWithThumbnailPtrs); 1500 1501 for (de=0;de<NumDirEntries;de++){ 1502 int Tag; 1503 unsigned char * DirEntry; 1504 DirEntry = DIR_ENTRY_ADDR(DirWithThumbnailPtrs, de); 1505 Tag = Get16u(DirEntry); 1506 if (Tag == TAG_THUMBNAIL_LENGTH){ 1507 // Set length to zero. 1508 if (Get16u(DirEntry+2) != FMT_ULONG){ 1509 // non standard format encoding. Can't do it. 1510 ErrNonfatal("Can't remove thumbnail", 0, 0); 1511 return 0; 1512 } 1513 Put32u(DirEntry+8, 0); 1514 } 1515 } 1516 } 1517 1518 // This is how far the non thumbnail data went. 1519 return ImageInfo.ThumbnailOffset+8; 1520 1521 } 1522 1523 1524 //-------------------------------------------------------------------------- 1525 // Convert exif time to Unix time structure 1526 //-------------------------------------------------------------------------- 1527 int Exif2tm(struct tm * timeptr, char * ExifTime) 1528 { 1529 int a; 1530 1531 timeptr->tm_wday = -1; 1532 1533 // Check for format: YYYY:MM:DD HH:MM:SS format. 1534 // Date and time normally separated by a space, but also seen a ':' there, so 1535 // skip the middle space with '%*c' so it can be any character. 1536 a = sscanf(ExifTime, "%d%*c%d%*c%d%*c%d:%d:%d", 1537 &timeptr->tm_year, &timeptr->tm_mon, &timeptr->tm_mday, 1538 &timeptr->tm_hour, &timeptr->tm_min, &timeptr->tm_sec); 1539 1540 1541 if (a == 6){ 1542 timeptr->tm_isdst = -1; 1543 timeptr->tm_mon -= 1; // Adjust for unix zero-based months 1544 timeptr->tm_year -= 1900; // Adjust for year starting at 1900 1545 return TRUE; // worked. 1546 } 1547 1548 return FALSE; // Wasn't in Exif date format. 1549 } 1550 1551 1552 //-------------------------------------------------------------------------- 1553 // Show the collected image info, displaying camera F-stop and shutter speed 1554 // in a consistent and legible fashion. 1555 //-------------------------------------------------------------------------- 1556 void ShowImageInfo(int ShowFileInfo) 1557 { 1558 if (ShowFileInfo){ 1559 printf("File name : %s\n",ImageInfo.FileName); 1560 printf("File size : %d bytes\n",ImageInfo.FileSize); 1561 1562 { 1563 char Temp[20]; 1564 FileTimeAsString(Temp); 1565 printf("File date : %s\n",Temp); 1566 } 1567 } 1568 1569 if (ImageInfo.CameraMake[0]){ 1570 printf("Camera make : %s\n",ImageInfo.CameraMake); 1571 printf("Camera model : %s\n",ImageInfo.CameraModel); 1572 } 1573 if (ImageInfo.DateTime[0]){ 1574 printf("Date/Time : %s\n",ImageInfo.DateTime); 1575 } 1576 printf("Resolution : %d x %d\n",ImageInfo.Width, ImageInfo.Height); 1577 1578 if (ImageInfo.Orientation > 1){ 1579 // Only print orientation if one was supplied, and if its not 1 (normal orientation) 1580 printf("Orientation : %s\n", OrientTab[ImageInfo.Orientation]); 1581 } 1582 1583 if (ImageInfo.IsColor == 0){ 1584 printf("Color/bw : Black and white\n"); 1585 } 1586 1587 if (ImageInfo.FlashUsed >= 0){ 1588 if (ImageInfo.FlashUsed & 1){ 1589 printf("Flash used : Yes"); 1590 switch (ImageInfo.FlashUsed){ 1591 case 0x5: printf(" (Strobe light not detected)"); break; 1592 case 0x7: printf(" (Strobe light detected) "); break; 1593 case 0x9: printf(" (manual)"); break; 1594 case 0xd: printf(" (manual, return light not detected)"); break; 1595 case 0xf: printf(" (manual, return light detected)"); break; 1596 case 0x19:printf(" (auto)"); break; 1597 case 0x1d:printf(" (auto, return light not detected)"); break; 1598 case 0x1f:printf(" (auto, return light detected)"); break; 1599 case 0x41:printf(" (red eye reduction mode)"); break; 1600 case 0x45:printf(" (red eye reduction mode return light not detected)"); break; 1601 case 0x47:printf(" (red eye reduction mode return light detected)"); break; 1602 case 0x49:printf(" (manual, red eye reduction mode)"); break; 1603 case 0x4d:printf(" (manual, red eye reduction mode, return light not detected)"); break; 1604 case 0x4f:printf(" (red eye reduction mode, return light detected)"); break; 1605 case 0x59:printf(" (auto, red eye reduction mode)"); break; 1606 case 0x5d:printf(" (auto, red eye reduction mode, return light not detected)"); break; 1607 case 0x5f:printf(" (auto, red eye reduction mode, return light detected)"); break; 1608 } 1609 }else{ 1610 printf("Flash used : No"); 1611 switch (ImageInfo.FlashUsed){ 1612 case 0x18:printf(" (auto)"); break; 1613 } 1614 } 1615 printf("\n"); 1616 } 1617 1618 1619 if (ImageInfo.FocalLength.num != 0 && ImageInfo.FocalLength.denom != 0) { 1620 printf("Focal length : %4.1fmm",(double)ImageInfo.FocalLength.num / ImageInfo.FocalLength.denom); 1621 if (ImageInfo.FocalLength35mmEquiv){ 1622 printf(" (35mm equivalent: %dmm)", ImageInfo.FocalLength35mmEquiv); 1623 } 1624 printf("\n"); 1625 } 1626 1627 if (ImageInfo.DigitalZoomRatio > 1){ 1628 // Digital zoom used. Shame on you! 1629 printf("Digital Zoom : %1.3fx\n", (double)ImageInfo.DigitalZoomRatio); 1630 } 1631 1632 if (ImageInfo.CCDWidth){ 1633 printf("CCD width : %4.2fmm\n",(double)ImageInfo.CCDWidth); 1634 } 1635 1636 if (ImageInfo.ExposureTime){ 1637 if (ImageInfo.ExposureTime < 0.010){ 1638 printf("Exposure time: %6.4f s ",(double)ImageInfo.ExposureTime); 1639 }else{ 1640 printf("Exposure time: %5.3f s ",(double)ImageInfo.ExposureTime); 1641 } 1642 if (ImageInfo.ExposureTime <= 0.5){ 1643 printf(" (1/%d)",(int)(0.5 + 1/ImageInfo.ExposureTime)); 1644 } 1645 printf("\n"); 1646 } 1647 if (ImageInfo.ApertureFNumber){ 1648 printf("Aperture : f/%3.1f\n",(double)ImageInfo.ApertureFNumber); 1649 } 1650 if (ImageInfo.Distance){ 1651 if (ImageInfo.Distance < 0){ 1652 printf("Focus dist. : Infinite\n"); 1653 }else{ 1654 printf("Focus dist. : %4.2fm\n",(double)ImageInfo.Distance); 1655 } 1656 } 1657 1658 if (ImageInfo.ISOequivalent){ 1659 printf("ISO equiv. : %2d\n",(int)ImageInfo.ISOequivalent); 1660 } 1661 1662 if (ImageInfo.ExposureBias){ 1663 // If exposure bias was specified, but set to zero, presumably its no bias at all, 1664 // so only show it if its nonzero. 1665 printf("Exposure bias: %4.2f\n",(double)ImageInfo.ExposureBias); 1666 } 1667 1668 switch(ImageInfo.Whitebalance) { 1669 case 1: 1670 printf("Whitebalance : Manual\n"); 1671 break; 1672 case 0: 1673 printf("Whitebalance : Auto\n"); 1674 break; 1675 } 1676 1677 //Quercus: 17-1-2004 Added LightSource, some cams return this, whitebalance or both 1678 switch(ImageInfo.LightSource) { 1679 case 1: 1680 printf("Light Source : Daylight\n"); 1681 break; 1682 case 2: 1683 printf("Light Source : Fluorescent\n"); 1684 break; 1685 case 3: 1686 printf("Light Source : Incandescent\n"); 1687 break; 1688 case 4: 1689 printf("Light Source : Flash\n"); 1690 break; 1691 case 9: 1692 printf("Light Source : Fine weather\n"); 1693 break; 1694 case 11: 1695 printf("Light Source : Shade\n"); 1696 break; 1697 default:; //Quercus: 17-1-2004 There are many more modes for this, check Exif2.2 specs 1698 // If it just says 'unknown' or we don't know it, then 1699 // don't bother showing it - it doesn't add any useful information. 1700 } 1701 1702 if (ImageInfo.MeteringMode){ // 05-jan-2001 vcs 1703 switch(ImageInfo.MeteringMode) { 1704 case 2: 1705 printf("Metering Mode: center weight\n"); 1706 break; 1707 case 3: 1708 printf("Metering Mode: spot\n"); 1709 break; 1710 case 5: 1711 printf("Metering Mode: matrix\n"); 1712 break; 1713 } 1714 } 1715 1716 if (ImageInfo.ExposureProgram){ // 05-jan-2001 vcs 1717 switch(ImageInfo.ExposureProgram) { 1718 case 1: 1719 printf("Exposure : Manual\n"); 1720 break; 1721 case 2: 1722 printf("Exposure : program (auto)\n"); 1723 break; 1724 case 3: 1725 printf("Exposure : aperture priority (semi-auto)\n"); 1726 break; 1727 case 4: 1728 printf("Exposure : shutter priority (semi-auto)\n"); 1729 break; 1730 case 5: 1731 printf("Exposure : Creative Program (based towards depth of field)\n"); 1732 break; 1733 case 6: 1734 printf("Exposure : Action program (based towards fast shutter speed)\n"); 1735 break; 1736 case 7: 1737 printf("Exposure : Portrait Mode\n"); 1738 break; 1739 case 8: 1740 printf("Exposure : LandscapeMode \n"); 1741 break; 1742 default: 1743 break; 1744 } 1745 } 1746 switch(ImageInfo.ExposureMode){ 1747 case 0: // Automatic (not worth cluttering up output for) 1748 break; 1749 case 1: printf("Exposure Mode: Manual\n"); 1750 break; 1751 case 2: printf("Exposure Mode: Auto bracketing\n"); 1752 break; 1753 } 1754 1755 if (ImageInfo.DistanceRange) { 1756 printf("Focus range : "); 1757 switch(ImageInfo.DistanceRange) { 1758 case 1: 1759 printf("macro"); 1760 break; 1761 case 2: 1762 printf("close"); 1763 break; 1764 case 3: 1765 printf("distant"); 1766 break; 1767 } 1768 printf("\n"); 1769 } 1770 1771 1772 1773 if (ImageInfo.Process != M_SOF0){ 1774 // don't show it if its the plain old boring 'baseline' process, but do 1775 // show it if its something else, like 'progressive' (used on web sometimes) 1776 int a; 1777 for (a=0;;a++){ 1778 if (a >= (int)PROCESS_TABLE_SIZE){ 1779 // ran off the end of the table. 1780 printf("Jpeg process : Unknown\n"); 1781 break; 1782 } 1783 if (ProcessTable[a].Tag == ImageInfo.Process){ 1784 printf("Jpeg process : %s\n",ProcessTable[a].Desc); 1785 break; 1786 } 1787 } 1788 } 1789 1790 if (ImageInfo.GpsInfoPresent){ 1791 printf("GPS Latitude : %s\n",ImageInfo.GpsLat); 1792 printf("GPS Longitude: %s\n",ImageInfo.GpsLong); 1793 if (ImageInfo.GpsAlt[0]) printf("GPS Altitude : %s\n",ImageInfo.GpsAlt); 1794 } 1795 1796 // Print the comment. Print 'Comment:' for each new line of comment. 1797 if (ImageInfo.Comments[0]){ 1798 int a,c; 1799 printf("Comment : "); 1800 if (!ImageInfo.CommentWidchars){ 1801 for (a=0;a<MAX_COMMENT_SIZE;a++){ 1802 c = ImageInfo.Comments[a]; 1803 if (c == '\0') break; 1804 if (c == '\n'){ 1805 // Do not start a new line if the string ends with a carriage return. 1806 if (ImageInfo.Comments[a+1] != '\0'){ 1807 printf("\nComment : "); 1808 }else{ 1809 printf("\n"); 1810 } 1811 }else{ 1812 putchar(c); 1813 } 1814 } 1815 printf("\n"); 1816 }else{ 1817 printf("%.*ls\n", ImageInfo.CommentWidchars, (wchar_t *)ImageInfo.Comments); 1818 } 1819 } 1820 if (ImageInfo.ThumbnailOffset){ 1821 printf("Map: %05d-%05d: Thumbnail\n",ImageInfo.ThumbnailOffset, ImageInfo.ThumbnailOffset+ImageInfo.ThumbnailSize); 1822 } else { 1823 printf("NO thumbnail"); 1824 } 1825 } 1826 1827 1828 //-------------------------------------------------------------------------- 1829 // Summarize highlights of image info on one line (suitable for grep-ing) 1830 //-------------------------------------------------------------------------- 1831 void ShowConciseImageInfo(void) 1832 { 1833 printf("\"%s\"",ImageInfo.FileName); 1834 1835 printf(" %dx%d",ImageInfo.Width, ImageInfo.Height); 1836 1837 if (ImageInfo.ExposureTime){ 1838 if (ImageInfo.ExposureTime <= 0.5){ 1839 printf(" (1/%d)",(int)(0.5 + 1/ImageInfo.ExposureTime)); 1840 }else{ 1841 printf(" (%1.1f)",ImageInfo.ExposureTime); 1842 } 1843 } 1844 1845 if (ImageInfo.ApertureFNumber){ 1846 printf(" f/%3.1f",(double)ImageInfo.ApertureFNumber); 1847 } 1848 1849 if (ImageInfo.FocalLength35mmEquiv){ 1850 printf(" f(35)=%dmm",ImageInfo.FocalLength35mmEquiv); 1851 } 1852 1853 if (ImageInfo.FlashUsed >= 0 && ImageInfo.FlashUsed & 1){ 1854 printf(" (flash)"); 1855 } 1856 1857 if (ImageInfo.IsColor == 0){ 1858 printf(" (bw)"); 1859 } 1860 1861 printf("\n"); 1862 } 1863
