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 15static unsigned char * DirWithThumbnailPtrs; 16static double FocalplaneXRes; 17static double FocalplaneUnits; 18static int ExifImageWidth; 19static int MotorolaOrder = 0; 20 21// for fixing the rotation. 22static void * OrientationPtr[2]; 23static int OrientationNumFormat[2]; 24int 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 36static 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 67static 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 79const 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" 192static 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 301int 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 314int 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//-------------------------------------------------------------------------- 322static 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//-------------------------------------------------------------------------- 336int 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//-------------------------------------------------------------------------- 348int 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//-------------------------------------------------------------------------- 362void 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//-------------------------------------------------------------------------- 380unsigned Get32u(void * Long) 381{ 382 return (unsigned)Get32s(Long) & 0xffffffff; 383} 384 385//-------------------------------------------------------------------------- 386// Display a number as one of its many formats 387//-------------------------------------------------------------------------- 388void 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//-------------------------------------------------------------------------- 425double 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//-------------------------------------------------------------------------- 467static 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 517static void ConvertDoubleToURational(double value, unsigned int *numerator, 518 unsigned int *denominator) { 519 float2urat(value, 0xFFFFFFFFU, numerator, denominator); 520} 521 522static 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//-------------------------------------------------------------------------- 543static 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_DATETIME_ORIGINAL: 715 // If we get a DATETIME_ORIGINAL, we use that one. 716 strncpy(ImageInfo.DateTime, (char *)ValuePtr, 19); 717 // Fallthru... 718 719 case TAG_DATETIME_DIGITIZED: 720 case TAG_DATETIME: 721 if (!isdigit(ImageInfo.DateTime[0])){ 722 // If we don't already have a DATETIME_ORIGINAL, use whatever 723 // time fields we may have. 724 strncpy(ImageInfo.DateTime, (char *)ValuePtr, 19); 725 } 726 727 if (ImageInfo.numDateTimeTags >= MAX_DATE_COPIES){ 728 ErrNonfatal("More than %d date fields! This is nuts", MAX_DATE_COPIES, 0); 729 break; 730 } 731 ImageInfo.DateTimeOffsets[ImageInfo.numDateTimeTags++] = 732 (char *)ValuePtr - (char *)OffsetBase; 733 break; 734 735 case TAG_WINXP_COMMENT: 736 if (ImageInfo.Comments[0]){ // We already have a jpeg comment. 737 // Already have a comment (probably windows comment), skip this one. 738 if (ShowTags) printf("Windows XP commend and other comment in header\n"); 739 break; // Already have a windows comment, skip this one. 740 } 741 742 if (ByteCount > 1){ 743 if (ByteCount > MAX_COMMENT_SIZE) ByteCount = MAX_COMMENT_SIZE; 744 memcpy(ImageInfo.Comments, ValuePtr, ByteCount); 745 ImageInfo.CommentWidchars = ByteCount/2; 746 } 747 break; 748 749 case TAG_USERCOMMENT: 750 if (ImageInfo.Comments[0]){ // We already have a jpeg comment. 751 // Already have a comment (probably windows comment), skip this one. 752 if (ShowTags) printf("Multiple comments in exif header\n"); 753 break; // Already have a windows comment, skip this one. 754 } 755 756 // Comment is often padded with trailing spaces. Remove these first. 757 for (a=ByteCount;;){ 758 a--; 759 if ((ValuePtr)[a] == ' '){ 760 (ValuePtr)[a] = '\0'; 761 }else{ 762 break; 763 } 764 if (a == 0) break; 765 } 766 767 // Copy the comment 768 { 769 // We want to set copied comment length (msize) to be the 770 // minimum of: 771 // (1) The space still available in Exif 772 // (2) The given comment length (ByteCount) 773 // (3) MAX_COMMENT_SIZE - 1 774 int msiz = ExifLength - (ValuePtr-OffsetBase); 775 if (msiz > ByteCount) msiz = ByteCount; 776 if (msiz > MAX_COMMENT_SIZE - 1) msiz = MAX_COMMENT_SIZE - 1; 777 if (msiz > 5 && memcmp(ValuePtr, "ASCII", 5) == 0) { 778 for (a = 5; a < 10 && a < msiz; a++) { 779 int c = (ValuePtr)[a]; 780 if (c != '\0' && c != ' ') { 781 strncpy(ImageInfo.Comments, 782 (char *)ValuePtr + a, msiz - a); 783 break; 784 } 785 } 786 } else { 787 strncpy(ImageInfo.Comments, (char *)ValuePtr, msiz); 788 } 789 } 790 break; 791 792 case TAG_FNUMBER: 793 // Simplest way of expressing aperture, so I trust it the most. 794 // (overwrite previously computd value if there is one) 795 ImageInfo.ApertureFNumber = (float)ConvertAnyFormat(ValuePtr, Format); 796 break; 797 798 case TAG_APERTURE: 799 case TAG_MAXAPERTURE: 800 // More relevant info always comes earlier, so only use this field if we don't 801 // have appropriate aperture information yet. 802 if (ImageInfo.ApertureFNumber == 0){ 803 ImageInfo.ApertureFNumber 804 = (float)exp(ConvertAnyFormat(ValuePtr, Format)*log(2)*0.5); 805 } 806 break; 807 808 case TAG_FOCALLENGTH: 809 // Nice digital cameras actually save the focal length as a function 810 // of how farthey are zoomed in. 811 ImageInfo.FocalLength.num = Get32u(ValuePtr); 812 ImageInfo.FocalLength.denom = Get32u(4+(char *)ValuePtr); 813 break; 814 815 case TAG_SUBJECT_DISTANCE: 816 // Inidcates the distacne the autofocus camera is focused to. 817 // Tends to be less accurate as distance increases. 818 ImageInfo.Distance = (float)ConvertAnyFormat(ValuePtr, Format); 819 break; 820 821 case TAG_EXPOSURETIME: 822 // Simplest way of expressing exposure time, so I trust it most. 823 // (overwrite previously computd value if there is one) 824 ImageInfo.ExposureTime = (float)ConvertAnyFormat(ValuePtr, Format); 825 break; 826 827 case TAG_SHUTTERSPEED: 828 // More complicated way of expressing exposure time, so only use 829 // this value if we don't already have it from somewhere else. 830 if (ImageInfo.ExposureTime == 0){ 831 ImageInfo.ExposureTime 832 = (float)(1/exp(ConvertAnyFormat(ValuePtr, Format)*log(2))); 833 } 834 break; 835 836 837 case TAG_FLASH: 838 ImageInfo.FlashUsed=(int)ConvertAnyFormat(ValuePtr, Format); 839 break; 840 841 case TAG_ORIENTATION: 842 if (NumOrientations >= 2){ 843 // Can have another orientation tag for the thumbnail, but if there's 844 // a third one, things are stringae. 845 ErrNonfatal("More than two orientation tags!",0,0); 846 break; 847 } 848 OrientationPtr[NumOrientations] = ValuePtr; 849 OrientationNumFormat[NumOrientations] = Format; 850 if (NumOrientations == 0){ 851 ImageInfo.Orientation = (int)ConvertAnyFormat(ValuePtr, Format); 852 } 853 if (ImageInfo.Orientation < 0 || ImageInfo.Orientation > 8){ 854 ErrNonfatal("Undefined rotation value %d", ImageInfo.Orientation, 0); 855 ImageInfo.Orientation = 0; 856 } 857 NumOrientations += 1; 858 break; 859 860 case TAG_EXIF_IMAGELENGTH: 861 case TAG_EXIF_IMAGEWIDTH: 862 // Use largest of height and width to deal with images that have been 863 // rotated to portrait format. 864 a = (int)ConvertAnyFormat(ValuePtr, Format); 865 if (ExifImageWidth < a) ExifImageWidth = a; 866 break; 867 868 case TAG_FOCAL_PLANE_XRES: 869 FocalplaneXRes = ConvertAnyFormat(ValuePtr, Format); 870 break; 871 872 case TAG_FOCAL_PLANE_UNITS: 873 switch((int)ConvertAnyFormat(ValuePtr, Format)){ 874 case 1: FocalplaneUnits = 25.4; break; // inch 875 case 2: 876 // According to the information I was using, 2 means meters. 877 // But looking at the Cannon powershot's files, inches is the only 878 // sensible value. 879 FocalplaneUnits = 25.4; 880 break; 881 882 case 3: FocalplaneUnits = 10; break; // centimeter 883 case 4: FocalplaneUnits = 1; break; // millimeter 884 case 5: FocalplaneUnits = .001; break; // micrometer 885 } 886 break; 887 888 case TAG_EXPOSURE_BIAS: 889 ImageInfo.ExposureBias = (float)ConvertAnyFormat(ValuePtr, Format); 890 break; 891 892 case TAG_WHITEBALANCE: 893 ImageInfo.Whitebalance = (int)ConvertAnyFormat(ValuePtr, Format); 894 break; 895 896 case TAG_LIGHT_SOURCE: 897 ImageInfo.LightSource = (int)ConvertAnyFormat(ValuePtr, Format); 898 break; 899 900 case TAG_METERING_MODE: 901 ImageInfo.MeteringMode = (int)ConvertAnyFormat(ValuePtr, Format); 902 break; 903 904 case TAG_EXPOSURE_PROGRAM: 905 ImageInfo.ExposureProgram = (int)ConvertAnyFormat(ValuePtr, Format); 906 break; 907 908 case TAG_EXPOSURE_INDEX: 909 if (ImageInfo.ISOequivalent == 0){ 910 // Exposure index and ISO equivalent are often used interchangeably, 911 // so we will do the same in jhead. 912 // http://photography.about.com/library/glossary/bldef_ei.htm 913 ImageInfo.ISOequivalent = (int)ConvertAnyFormat(ValuePtr, Format); 914 } 915 break; 916 917 case TAG_EXPOSURE_MODE: 918 ImageInfo.ExposureMode = (int)ConvertAnyFormat(ValuePtr, Format); 919 break; 920 921 case TAG_ISO_EQUIVALENT: 922 ImageInfo.ISOequivalent = (int)ConvertAnyFormat(ValuePtr, Format); 923 if ( ImageInfo.ISOequivalent < 50 ){ 924 // Fixes strange encoding on some older digicams. 925 ImageInfo.ISOequivalent *= 200; 926 } 927 break; 928 929 case TAG_DIGITALZOOMRATIO: 930 ImageInfo.DigitalZoomRatio = (float)ConvertAnyFormat(ValuePtr, Format); 931 break; 932 933 case TAG_THUMBNAIL_OFFSET: 934 ThumbnailOffset = (unsigned)ConvertAnyFormat(ValuePtr, Format); 935 DirWithThumbnailPtrs = DirStart; 936 break; 937 938 case TAG_THUMBNAIL_LENGTH: 939 ThumbnailSize = (unsigned)ConvertAnyFormat(ValuePtr, Format); 940 ImageInfo.ThumbnailSizeOffset = ValuePtr-OffsetBase; 941 break; 942 943 case TAG_EXIF_OFFSET: 944 if (ShowTags) printf("%s Exif Dir:",IndentString); 945 946 case TAG_INTEROP_OFFSET: 947 if (Tag == TAG_INTEROP_OFFSET && ShowTags) printf("%s Interop Dir:",IndentString); 948 { 949 unsigned char * SubdirStart; 950 SubdirStart = OffsetBase + Get32u(ValuePtr); 951 if (SubdirStart < OffsetBase || SubdirStart > OffsetBase+ExifLength){ 952 ErrNonfatal("Illegal exif or interop ofset directory link",0,0); 953 }else{ 954 ProcessExifDir(SubdirStart, OffsetBase, ExifLength, NestingLevel+1); 955 } 956 continue; 957 } 958 break; 959 960 case TAG_GPSINFO: 961 if (ShowTags) printf("%s GPS info dir:",IndentString); 962 { 963 unsigned char * SubdirStart; 964 SubdirStart = OffsetBase + Get32u(ValuePtr); 965 if (SubdirStart < OffsetBase || SubdirStart > OffsetBase+ExifLength){ 966 ErrNonfatal("Illegal GPS directory link",0,0); 967 }else{ 968 ProcessGpsInfo(SubdirStart, ByteCount, OffsetBase, ExifLength); 969 } 970 continue; 971 } 972 break; 973 974 case TAG_FOCALLENGTH_35MM: 975 // The focal length equivalent 35 mm is a 2.2 tag (defined as of April 2002) 976 // if its present, use it to compute equivalent focal length instead of 977 // computing it from sensor geometry and actual focal length. 978 ImageInfo.FocalLength35mmEquiv = (unsigned)ConvertAnyFormat(ValuePtr, Format); 979 break; 980 981 case TAG_DISTANCE_RANGE: 982 // Three possible standard values: 983 // 1 = macro, 2 = close, 3 = distant 984 ImageInfo.DistanceRange = (int)ConvertAnyFormat(ValuePtr, Format); 985 break; 986 } 987 } 988 989 990 { 991 // In addition to linking to subdirectories via exif tags, 992 // there's also a potential link to another directory at the end of each 993 // directory. this has got to be the result of a committee! 994 unsigned char * SubdirStart; 995 unsigned Offset; 996 997 if (DIR_ENTRY_ADDR(DirStart, NumDirEntries) + 4 <= OffsetBase+ExifLength){ 998 printf("DirStart %d offset from dirstart %d", (int)DirStart, 2+12*NumDirEntries); 999 Offset = Get32u(DirStart+2+12*NumDirEntries); 1000 if (Offset){ 1001 SubdirStart = OffsetBase + Offset; 1002 if (SubdirStart > OffsetBase+ExifLength || SubdirStart < OffsetBase){ 1003 printf("SubdirStart %d OffsetBase %d ExifLength %d Offset %d", 1004 (int)SubdirStart, (int)OffsetBase, ExifLength, Offset); 1005 if (SubdirStart > OffsetBase && SubdirStart < OffsetBase+ExifLength+20){ 1006 // Jhead 1.3 or earlier would crop the whole directory! 1007 // As Jhead produces this form of format incorrectness, 1008 // I'll just let it pass silently 1009 if (ShowTags) printf("Thumbnail removed with Jhead 1.3 or earlier\n"); 1010 }else{ 1011 ErrNonfatal("Illegal subdirectory link",0,0); 1012 } 1013 }else{ 1014 if (SubdirStart <= OffsetBase+ExifLength){ 1015 if (ShowTags) printf("%s Continued directory ",IndentString); 1016 ProcessExifDir(SubdirStart, OffsetBase, ExifLength, NestingLevel+1); 1017 } 1018 } 1019 if (Offset > ImageInfo.LargestExifOffset){ 1020 ImageInfo.LargestExifOffset = Offset; 1021 } 1022 } 1023 }else{ 1024 // The exif header ends before the last next directory pointer. 1025 } 1026 } 1027 1028 if (ThumbnailOffset){ 1029 ImageInfo.ThumbnailAtEnd = FALSE; 1030 1031 if (DumpExifMap){ 1032 printf("Map: %05d-%05d: Thumbnail\n",ThumbnailOffset, ThumbnailOffset+ThumbnailSize); 1033 } 1034 1035 if (ThumbnailOffset <= ExifLength){ 1036 if (ThumbnailSize > ExifLength-ThumbnailOffset){ 1037 // If thumbnail extends past exif header, only save the part that 1038 // actually exists. Canon's EOS viewer utility will do this - the 1039 // thumbnail extracts ok with this hack. 1040 ThumbnailSize = ExifLength-ThumbnailOffset; 1041 if (ShowTags) printf("Thumbnail incorrectly placed in header\n"); 1042 1043 } 1044 // The thumbnail pointer appears to be valid. Store it. 1045 ImageInfo.ThumbnailOffset = ThumbnailOffset; 1046 ImageInfo.ThumbnailSize = ThumbnailSize; 1047 1048 if (ShowTags){ 1049 printf("Thumbnail size: %d bytes\n",ThumbnailSize); 1050 } 1051 } 1052 } 1053 printf("returning from ProcessExifDir"); 1054} 1055 1056 1057//-------------------------------------------------------------------------- 1058// Process a EXIF marker 1059// Describes all the drivel that most digital cameras include... 1060//-------------------------------------------------------------------------- 1061void process_EXIF (unsigned char * ExifSection, unsigned int length) 1062{ 1063 int FirstOffset; 1064 1065 FocalplaneXRes = 0; 1066 FocalplaneUnits = 0; 1067 ExifImageWidth = 0; 1068 NumOrientations = 0; 1069 1070 if (ShowTags){ 1071 printf("Exif header %d bytes long\n",length); 1072 } 1073 1074 { // Check the EXIF header component 1075 static uchar ExifHeader[] = "Exif\0\0"; 1076 if (memcmp(ExifSection+2, ExifHeader,6)){ 1077 ErrNonfatal("Incorrect Exif header",0,0); 1078 return; 1079 } 1080 } 1081 1082 if (memcmp(ExifSection+8,"II",2) == 0){ 1083 if (ShowTags) printf("Exif section in Intel order\n"); 1084 MotorolaOrder = 0; 1085 }else{ 1086 if (memcmp(ExifSection+8,"MM",2) == 0){ 1087 if (ShowTags) printf("Exif section in Motorola order\n"); 1088 MotorolaOrder = 1; 1089 }else{ 1090 ErrNonfatal("Invalid Exif alignment marker.",0,0); 1091 return; 1092 } 1093 } 1094 1095 // Check the next value for correctness. 1096 if (Get16u(ExifSection+10) != 0x2a){ 1097 ErrNonfatal("Invalid Exif start (1)",0,0); 1098 return; 1099 } 1100 1101 FirstOffset = Get32u(ExifSection+12); 1102 if (FirstOffset < 8 || FirstOffset > 16){ 1103 // Usually set to 8, but other values valid too. 1104 ErrNonfatal("Suspicious offset of first IFD value",0,0); 1105 return; 1106 } 1107 1108 DirWithThumbnailPtrs = NULL; 1109 1110 1111 // First directory starts 16 bytes in. All offset are relative to 8 bytes in. 1112 ProcessExifDir(ExifSection+8+FirstOffset, ExifSection+8, length-8, 0); 1113 1114 ImageInfo.ThumbnailAtEnd = ImageInfo.ThumbnailOffset >= ImageInfo.LargestExifOffset ? TRUE : FALSE; 1115#ifdef SUPERDEBUG 1116 printf("Thumbnail %s end", (ImageInfo.ThumbnailAtEnd ? "at" : "NOT at")); 1117#endif 1118 if (DumpExifMap){ 1119 unsigned a,b; 1120 printf("Map: %05d- End of exif\n",length-8); 1121// for (a=0;a<length-8;a+= 10){ 1122// printf("Map: %05d ",a); 1123// for (b=0;b<10;b++) printf(" %02x",*(ExifSection+8+a+b)); 1124// printf("\n"); 1125// } 1126 for (a = 0; a < length - 8; ++a) { 1127 unsigned char c = *(ExifSection+8+a); 1128 unsigned pc = isprint(c) ? c : ' '; 1129 printf("Map: %4d %02x %c", a, c, pc); 1130 } 1131 } 1132 1133 1134 // Compute the CCD width, in millimeters. 1135 if (FocalplaneXRes != 0){ 1136 // Note: With some cameras, its not possible to compute this correctly because 1137 // they don't adjust the indicated focal plane resolution units when using less 1138 // than maximum resolution, so the CCDWidth value comes out too small. Nothing 1139 // that Jhad can do about it - its a camera problem. 1140 ImageInfo.CCDWidth = (float)(ExifImageWidth * FocalplaneUnits / FocalplaneXRes); 1141 1142 if (ImageInfo.FocalLength.num != 0 && ImageInfo.FocalLength.denom != 0 1143 && ImageInfo.FocalLength35mmEquiv == 0){ 1144 // Compute 35 mm equivalent focal length based on sensor geometry if we haven't 1145 // already got it explicitly from a tag. 1146 ImageInfo.FocalLength35mmEquiv = (int)( 1147 (double)ImageInfo.FocalLength.num / ImageInfo.FocalLength.denom 1148 / ImageInfo.CCDWidth * 36 + 0.5); 1149 } 1150 } 1151} 1152 1153static const TagTable_t* TagToTagTableEntry(unsigned short tag) 1154{ 1155 unsigned int i; 1156 for (i = 0; i < TAG_TABLE_SIZE; i++) { 1157 if (TagTable[i].Tag == tag) { 1158 printf("found tag %d", tag); 1159 int format = TagTable[i].Format; 1160 if (format == 0) { 1161 printf("tag %s format not defined ***** YOU MUST ADD THE FORMAT TO THE TagTable in exif.c!!!!", TagTable[i].Desc); 1162 return NULL; 1163 } 1164 return &TagTable[i]; 1165 } 1166 } 1167 printf("tag %d NOT FOUND", tag); 1168 return NULL; 1169} 1170 1171static void writeExifTagAndData(int tag, 1172 int format, 1173 long components, 1174 long value, 1175 int valueInString, 1176 char* Buffer, 1177 int* DirIndex, 1178 int* DataWriteIndex) { 1179 void* componentsPosition = NULL; // for saving component position 1180 1181 Put16u(Buffer+ (*DirIndex), tag); // Tag 1182 Put16u(Buffer+(*DirIndex) + 2, format); // Format 1183 if (format == FMT_STRING && components == -1) { 1184 components = strlen((char*)value) + 1; // account for null terminator 1185 if (components & 1) ++components; // no odd lengths 1186 } else if (format == FMT_SSHORT && components == -1) { 1187 // jhead only supports reading one SSHORT anyway 1188 components = 1; 1189 } 1190 if (format == FMT_UNDEFINED && components == -1) { 1191 // check if this UNDEFINED format is actually ASCII (as it usually is) 1192 // if so, we can calculate the size 1193 if(memcmp((char*)value, ExifAsciiPrefix, sizeof(ExifAsciiPrefix)) == 0) { 1194 components = sizeof(ExifAsciiPrefix) + 1195 strlen((char*)value + sizeof(ExifAsciiPrefix)) + 1; 1196 if (components & 1) ++components; // no odd lengths 1197 } 1198 } 1199 Put32u(Buffer+(*DirIndex) + 4, components); // Components 1200 componentsPosition = Buffer+(*DirIndex) + 4; // components # can change for lists 1201 printf("# components: %ld", components); 1202 if (format == FMT_STRING) { 1203 // short strings can fit right in the long, otherwise have to 1204 // go in the data area 1205 if (components <= 4) { 1206 strcpy(Buffer+(*DirIndex) + 8, (char*)value); 1207 } else { 1208 Put32u(Buffer+(*DirIndex) + 8, (*DataWriteIndex)-8); // Pointer 1209 printf("copying value %s to %d", (char*)value, (*DataWriteIndex)); 1210 strncpy(Buffer+(*DataWriteIndex), (char*)value, components); 1211 (*DataWriteIndex) += components; 1212 } 1213 } else if ((format == FMT_UNDEFINED) && 1214 (memcmp((char*)value, ExifAsciiPrefix, sizeof(ExifAsciiPrefix)) == 0)) { 1215 // short strings can fit right in the long, otherwise have to 1216 // go in the data area 1217 if (components <= 4) { 1218 memcpy(Buffer+(*DirIndex) + 8, (char*)value, components); 1219 } else { 1220 Put32u(Buffer+(*DirIndex) + 8, (*DataWriteIndex)-8); // Pointer 1221 printf("copying %s to %d", (char*)value + sizeof(ExifAsciiPrefix), (*DataWriteIndex)); 1222 memcpy(Buffer+(*DataWriteIndex), (char*)value, components); 1223 (*DataWriteIndex) += components; 1224 } 1225 } else if (!valueInString) { 1226 Put32u(Buffer+(*DirIndex) + 8, value); // Value 1227 } else { 1228 Put32u(Buffer+(*DirIndex) + 8, (*DataWriteIndex)-8); // Pointer 1229 // Usually the separator is ',', but sometimes ':' is used, like 1230 // TAG_GPS_TIMESTAMP. 1231 char* curElement = strtok((char*)value, ",:"); 1232 int i; 1233 1234 // (components == -1) Need to handle lists with unknown length too 1235 for (i = 0; ((i < components) || (components == -1)) && curElement != NULL; i++) { 1236#ifdef SUPERDEBUG 1237 printf("processing component %s format %s", curElement, formatStr(format)); 1238#endif 1239 // elements are separated by commas 1240 if (format == FMT_URATIONAL) { 1241 unsigned int numerator; 1242 unsigned int denominator; 1243 char* separator = strchr(curElement, '/'); 1244 if (separator) { 1245 numerator = atoi(curElement); 1246 denominator = atoi(separator + 1); 1247 } else { 1248 double value = atof(curElement); 1249 ConvertDoubleToURational(value, &numerator, &denominator); 1250 } 1251 Put32u(Buffer+(*DataWriteIndex), numerator); 1252 Put32u(Buffer+(*DataWriteIndex) + 4, denominator); 1253 (*DataWriteIndex) += 8; 1254 } else if (format == FMT_SRATIONAL) { 1255 int numerator; 1256 int denominator; 1257 char* separator = strchr(curElement, '/'); 1258 if (separator) { 1259 numerator = atoi(curElement); 1260 denominator = atoi(separator + 1); 1261 } else { 1262 double value = atof(curElement); 1263 ConvertDoubleToSRational(value, &numerator, &denominator); 1264 } 1265 Put32u(Buffer+(*DataWriteIndex), numerator); 1266 Put32u(Buffer+(*DataWriteIndex) + 4, denominator); 1267 (*DataWriteIndex) += 8; 1268 } else if ((components == -1) && ((format == FMT_USHORT) || (format == FMT_SSHORT))) { 1269 // variable components need to go into data write area 1270 value = atoi(curElement); 1271 Put16u(Buffer+(*DataWriteIndex), value); 1272 (*DataWriteIndex) += 4; 1273 } else { 1274 // TODO: doesn't handle multiple components yet -- if more than one, have to put in data write area. 1275 value = atoi(curElement); 1276 Put32u(Buffer+(*DirIndex) + 8, value); // Value 1277 } 1278 curElement = strtok(NULL, ",:"); 1279 } 1280 if (components == -1) Put32u(componentsPosition, i); // update component # for unknowns 1281 } 1282 (*DirIndex) += 12; 1283} 1284 1285#ifdef SUPERDEBUG 1286char* formatStr(int format) { 1287 switch (format) { 1288 case FMT_BYTE: return "FMT_BYTE"; break; 1289 case FMT_STRING: return "FMT_STRING"; break; 1290 case FMT_USHORT: return "FMT_USHORT"; break; 1291 case FMT_ULONG: return "FMT_ULONG"; break; 1292 case FMT_URATIONAL: return "FMT_URATIONAL"; break; 1293 case FMT_SBYTE: return "FMT_SBYTE"; break; 1294 case FMT_UNDEFINED: return "FMT_UNDEFINED"; break; 1295 case FMT_SSHORT: return "FMT_SSHORT"; break; 1296 case FMT_SLONG: return "FMT_SLONG"; break; 1297 case FMT_SRATIONAL: return "FMT_SRATIONAL"; break; 1298 case FMT_SINGLE: return "FMT_SINGLE"; break; 1299 case FMT_DOUBLE: return "FMT_SINGLE"; break; 1300 default: return "UNKNOWN"; 1301 } 1302} 1303#endif 1304 1305//-------------------------------------------------------------------------- 1306// Create minimal exif header - just date and thumbnail pointers, 1307// so that date and thumbnail may be filled later. 1308//-------------------------------------------------------------------------- 1309static void create_EXIF_internal(ExifElement_t* elements, int exifTagCount, int gpsTagCount, int hasDateTimeTag, char* Buffer) 1310{ 1311 unsigned short NumEntries; 1312 int DataWriteIndex; 1313 int DirIndex; 1314 int DirExifLink = 0; 1315 1316#ifdef SUPERDEBUG 1317 ALOGE("create_EXIF %d exif elements, %d gps elements", exifTagCount, gpsTagCount); 1318#endif 1319 1320 MotorolaOrder = 0; 1321 1322 memcpy(Buffer+2, "Exif\0\0II",8); 1323 Put16u(Buffer+10, 0x2a); 1324 1325 DataWriteIndex = 16; 1326 Put32u(Buffer+12, DataWriteIndex-8); // first IFD offset. Means start 16 bytes in. 1327 1328 { 1329 DirIndex = DataWriteIndex; 1330 NumEntries = 1 + exifTagCount; // the extra is the thumbnail 1331 if (gpsTagCount) { 1332 ++NumEntries; // allow for the GPS info tag 1333 } 1334 if (!hasDateTimeTag) { 1335 // We have to write extra date time tag. The entry number should be 1336 // adjusted. 1337 ++NumEntries; 1338 } 1339 DataWriteIndex += 2 + NumEntries*12 + 4; 1340 1341 Put16u(Buffer+DirIndex, NumEntries); // Number of entries 1342 DirIndex += 2; 1343 1344 // Entries go here... 1345 if (!hasDateTimeTag) { 1346 // Date/time entry 1347 char* dateTime = NULL; 1348 char dateBuf[20]; 1349 if (ImageInfo.numDateTimeTags) { 1350 // If we had a pre-existing exif header, use time from that. 1351 dateTime = ImageInfo.DateTime; 1352 } else { 1353 // Oterwise, use the file's timestamp. 1354 FileTimeAsString(dateBuf); 1355 dateTime = dateBuf; 1356 } 1357 writeExifTagAndData(TAG_DATETIME, 1358 FMT_STRING, 1359 20, 1360 (long)(char*)dateBuf, 1361 FALSE, 1362 Buffer, 1363 &DirIndex, 1364 &DataWriteIndex); 1365 1366 } 1367 if (exifTagCount > 0) { 1368 int i; 1369 for (i = 0; i < exifTagCount + gpsTagCount; i++) { 1370 if (elements[i].GpsTag) { 1371 continue; 1372 } 1373 const TagTable_t* entry = TagToTagTableEntry(elements[i].Tag); 1374 if (entry == NULL) { 1375 continue; 1376 } 1377#ifdef SUPERDEBUG 1378 ALOGE("create_EXIF saving tag %x value \"%s\"",elements[i].Tag, elements[i].Value); 1379#endif 1380 writeExifTagAndData(elements[i].Tag, 1381 entry->Format, 1382 entry->DataLength, 1383 (long)elements[i].Value, 1384 TRUE, 1385 Buffer, 1386 &DirIndex, 1387 &DataWriteIndex); 1388 } 1389 1390 if (gpsTagCount) { 1391 // Link to gps dir entry 1392 writeExifTagAndData(TAG_GPSINFO, 1393 FMT_ULONG, 1394 1, 1395 DataWriteIndex-8, 1396 FALSE, 1397 Buffer, 1398 &DirIndex, 1399 &DataWriteIndex); 1400 } 1401 1402 // Link to exif dir entry 1403 int exifDirPtr = DataWriteIndex-8; 1404 if (gpsTagCount) { 1405 exifDirPtr += 2 + gpsTagCount*12 + 4; 1406 } 1407 DirExifLink = DirIndex; 1408 writeExifTagAndData(TAG_EXIF_OFFSET, 1409 FMT_ULONG, 1410 1, 1411 exifDirPtr, 1412 FALSE, 1413 Buffer, 1414 &DirIndex, 1415 &DataWriteIndex); 1416 } 1417 1418 // End of directory - contains optional link to continued directory. 1419 Put32u(Buffer+DirIndex, 0); 1420 printf("Ending Exif section DirIndex = %d DataWriteIndex %d", DirIndex, DataWriteIndex); 1421 } 1422 1423 1424 // GPS Section 1425 if (gpsTagCount) { 1426 DirIndex = DataWriteIndex; 1427 printf("Starting GPS section DirIndex = %d", DirIndex); 1428 NumEntries = gpsTagCount; 1429 DataWriteIndex += 2 + NumEntries*12 + 4; 1430 1431 Put16u(Buffer+DirIndex, NumEntries); // Number of entries 1432 DirIndex += 2; 1433 { 1434 int i; 1435 for (i = 0; i < exifTagCount + gpsTagCount; i++) { 1436 if (!elements[i].GpsTag) { 1437 continue; 1438 } 1439 const TagTable_t* entry = GpsTagToTagTableEntry(elements[i].Tag); 1440 if (entry == NULL) { 1441 continue; 1442 } 1443#ifdef SUPERDEBUG 1444 ALOGE("create_EXIF saving GPS tag %x value \"%s\"",elements[i].Tag, elements[i].Value); 1445#endif 1446 writeExifTagAndData(elements[i].Tag, 1447 entry->Format, 1448 entry->DataLength, 1449 (long)elements[i].Value, 1450 TRUE, 1451 Buffer, 1452 &DirIndex, 1453 &DataWriteIndex); 1454 } 1455 } 1456 1457 // End of directory - contains optional link to continued directory. 1458 Put32u(Buffer+DirIndex, 0); 1459 printf("Ending GPS section DirIndex = %d DataWriteIndex %d", DirIndex, DataWriteIndex); 1460 } 1461 1462 { 1463 // Overwriting TAG_EXIF_OFFSET which links to this directory 1464 Put32u(Buffer+DirExifLink+8, DataWriteIndex-8); 1465 1466 printf("Starting Thumbnail section DirIndex = %d", DirIndex); 1467 DirIndex = DataWriteIndex; 1468 NumEntries = 2; 1469 DataWriteIndex += 2 + NumEntries*12 + 4; 1470 1471 Put16u(Buffer+DirIndex, NumEntries); // Number of entries 1472 DirIndex += 2; 1473 { 1474 // Link to exif dir entry 1475 writeExifTagAndData(TAG_THUMBNAIL_OFFSET, 1476 FMT_ULONG, 1477 1, 1478 DataWriteIndex-8, 1479 FALSE, 1480 Buffer, 1481 &DirIndex, 1482 &DataWriteIndex); 1483 } 1484 1485 { 1486 // Link to exif dir entry 1487 writeExifTagAndData(TAG_THUMBNAIL_LENGTH, 1488 FMT_ULONG, 1489 1, 1490 0, 1491 FALSE, 1492 Buffer, 1493 &DirIndex, 1494 &DataWriteIndex); 1495 } 1496 1497 // End of directory - contains optional link to continued directory. 1498 Put32u(Buffer+DirIndex, 0); 1499 printf("Ending Thumbnail section DirIndex = %d DataWriteIndex %d", DirIndex, DataWriteIndex); 1500 } 1501 1502 1503 Buffer[0] = (unsigned char)(DataWriteIndex >> 8); 1504 Buffer[1] = (unsigned char)DataWriteIndex; 1505 1506 // Remove old exif section, if there was one. 1507 RemoveSectionType(M_EXIF); 1508 1509 { 1510 // Sections need malloced buffers, so do that now, especially because 1511 // we now know how big it needs to be allocated. 1512 unsigned char * NewBuf = malloc(DataWriteIndex); 1513 if (NewBuf == NULL){ 1514 ErrFatal("Could not allocate memory"); 1515 } 1516 memcpy(NewBuf, Buffer, DataWriteIndex); 1517 1518 CreateSection(M_EXIF, NewBuf, DataWriteIndex); 1519 1520 // Re-parse new exif section, now that its in place 1521 // otherwise, we risk touching data that has already been freed. 1522 process_EXIF(NewBuf, DataWriteIndex); 1523 } 1524} 1525 1526void create_EXIF(ExifElement_t* elements, int exifTagCount, int gpsTagCount, int hasDateTimeTag) 1527{ 1528 // It is hard to calculate exact necessary size for editing the exif 1529 // header dynamically, so we are using the maximum size of EXIF, 64K 1530 const int EXIF_MAX_SIZE = 1024*64; 1531 char* Buffer = malloc(EXIF_MAX_SIZE); 1532 1533 if (Buffer != NULL) { 1534 create_EXIF_internal(elements, exifTagCount, gpsTagCount, hasDateTimeTag, Buffer); 1535 free(Buffer); 1536 } else { 1537 ErrFatal("Could not allocate memory"); 1538 } 1539} 1540 1541//-------------------------------------------------------------------------- 1542// Cler the rotation tag in the exif header to 1. 1543//-------------------------------------------------------------------------- 1544const char * ClearOrientation(void) 1545{ 1546 int a; 1547 if (NumOrientations == 0) return NULL; 1548 1549 for (a=0;a<NumOrientations;a++){ 1550 switch(OrientationNumFormat[a]){ 1551 case FMT_SBYTE: 1552 case FMT_BYTE: 1553 *(uchar *)(OrientationPtr[a]) = 1; 1554 break; 1555 1556 case FMT_USHORT: 1557 Put16u(OrientationPtr[a], 1); 1558 break; 1559 1560 case FMT_ULONG: 1561 case FMT_SLONG: 1562 memset(OrientationPtr, 0, 4); 1563 // Can't be bothered to write generic Put32 if I only use it once. 1564 if (MotorolaOrder){ 1565 ((uchar *)OrientationPtr[a])[3] = 1; 1566 }else{ 1567 ((uchar *)OrientationPtr[a])[0] = 1; 1568 } 1569 break; 1570 1571 default: 1572 return NULL; 1573 } 1574 } 1575 1576 return OrientTab[ImageInfo.Orientation]; 1577} 1578 1579 1580 1581//-------------------------------------------------------------------------- 1582// Remove thumbnail out of the exif image. 1583//-------------------------------------------------------------------------- 1584int RemoveThumbnail(unsigned char * ExifSection) 1585{ 1586 if (!DirWithThumbnailPtrs || 1587 ImageInfo.ThumbnailOffset == 0 || 1588 ImageInfo.ThumbnailSize == 0){ 1589 // No thumbnail, or already deleted it. 1590 return 0; 1591 } 1592 if (ImageInfo.ThumbnailAtEnd == FALSE){ 1593 ErrNonfatal("Thumbnail is not at end of header, can't chop it off", 0, 0); 1594 return 0; 1595 } 1596 1597 { 1598 int de; 1599 int NumDirEntries; 1600 NumDirEntries = Get16u(DirWithThumbnailPtrs); 1601 1602 for (de=0;de<NumDirEntries;de++){ 1603 int Tag; 1604 unsigned char * DirEntry; 1605 DirEntry = DIR_ENTRY_ADDR(DirWithThumbnailPtrs, de); 1606 Tag = Get16u(DirEntry); 1607 if (Tag == TAG_THUMBNAIL_LENGTH){ 1608 // Set length to zero. 1609 if (Get16u(DirEntry+2) != FMT_ULONG){ 1610 // non standard format encoding. Can't do it. 1611 ErrNonfatal("Can't remove thumbnail", 0, 0); 1612 return 0; 1613 } 1614 Put32u(DirEntry+8, 0); 1615 } 1616 } 1617 } 1618 1619 // This is how far the non thumbnail data went. 1620 return ImageInfo.ThumbnailOffset+8; 1621 1622} 1623 1624 1625//-------------------------------------------------------------------------- 1626// Convert exif time to Unix time structure 1627//-------------------------------------------------------------------------- 1628int Exif2tm(struct tm * timeptr, char * ExifTime) 1629{ 1630 int a; 1631 1632 timeptr->tm_wday = -1; 1633 1634 // Check for format: YYYY:MM:DD HH:MM:SS format. 1635 // Date and time normally separated by a space, but also seen a ':' there, so 1636 // skip the middle space with '%*c' so it can be any character. 1637 a = sscanf(ExifTime, "%d%*c%d%*c%d%*c%d:%d:%d", 1638 &timeptr->tm_year, &timeptr->tm_mon, &timeptr->tm_mday, 1639 &timeptr->tm_hour, &timeptr->tm_min, &timeptr->tm_sec); 1640 1641 1642 if (a == 6){ 1643 timeptr->tm_isdst = -1; 1644 timeptr->tm_mon -= 1; // Adjust for unix zero-based months 1645 timeptr->tm_year -= 1900; // Adjust for year starting at 1900 1646 return TRUE; // worked. 1647 } 1648 1649 return FALSE; // Wasn't in Exif date format. 1650} 1651 1652 1653//-------------------------------------------------------------------------- 1654// Show the collected image info, displaying camera F-stop and shutter speed 1655// in a consistent and legible fashion. 1656//-------------------------------------------------------------------------- 1657void ShowImageInfo(int ShowFileInfo) 1658{ 1659 if (ShowFileInfo){ 1660 printf("File name : %s\n",ImageInfo.FileName); 1661 printf("File size : %d bytes\n",ImageInfo.FileSize); 1662 1663 { 1664 char Temp[20]; 1665 FileTimeAsString(Temp); 1666 printf("File date : %s\n",Temp); 1667 } 1668 } 1669 1670 if (ImageInfo.CameraMake[0]){ 1671 printf("Camera make : %s\n",ImageInfo.CameraMake); 1672 printf("Camera model : %s\n",ImageInfo.CameraModel); 1673 } 1674 if (ImageInfo.DateTime[0]){ 1675 printf("Date/Time : %s\n",ImageInfo.DateTime); 1676 } 1677 printf("Resolution : %d x %d\n",ImageInfo.Width, ImageInfo.Height); 1678 1679 if (ImageInfo.Orientation > 1){ 1680 // Only print orientation if one was supplied, and if its not 1 (normal orientation) 1681 printf("Orientation : %s\n", OrientTab[ImageInfo.Orientation]); 1682 } 1683 1684 if (ImageInfo.IsColor == 0){ 1685 printf("Color/bw : Black and white\n"); 1686 } 1687 1688 if (ImageInfo.FlashUsed >= 0){ 1689 if (ImageInfo.FlashUsed & 1){ 1690 printf("Flash used : Yes"); 1691 switch (ImageInfo.FlashUsed){ 1692 case 0x5: printf(" (Strobe light not detected)"); break; 1693 case 0x7: printf(" (Strobe light detected) "); break; 1694 case 0x9: printf(" (manual)"); break; 1695 case 0xd: printf(" (manual, return light not detected)"); break; 1696 case 0xf: printf(" (manual, return light detected)"); break; 1697 case 0x19:printf(" (auto)"); break; 1698 case 0x1d:printf(" (auto, return light not detected)"); break; 1699 case 0x1f:printf(" (auto, return light detected)"); break; 1700 case 0x41:printf(" (red eye reduction mode)"); break; 1701 case 0x45:printf(" (red eye reduction mode return light not detected)"); break; 1702 case 0x47:printf(" (red eye reduction mode return light detected)"); break; 1703 case 0x49:printf(" (manual, red eye reduction mode)"); break; 1704 case 0x4d:printf(" (manual, red eye reduction mode, return light not detected)"); break; 1705 case 0x4f:printf(" (red eye reduction mode, return light detected)"); break; 1706 case 0x59:printf(" (auto, red eye reduction mode)"); break; 1707 case 0x5d:printf(" (auto, red eye reduction mode, return light not detected)"); break; 1708 case 0x5f:printf(" (auto, red eye reduction mode, return light detected)"); break; 1709 } 1710 }else{ 1711 printf("Flash used : No"); 1712 switch (ImageInfo.FlashUsed){ 1713 case 0x18:printf(" (auto)"); break; 1714 } 1715 } 1716 printf("\n"); 1717 } 1718 1719 1720 if (ImageInfo.FocalLength.num != 0 && ImageInfo.FocalLength.denom != 0) { 1721 printf("Focal length : %4.1fmm",(double)ImageInfo.FocalLength.num / ImageInfo.FocalLength.denom); 1722 if (ImageInfo.FocalLength35mmEquiv){ 1723 printf(" (35mm equivalent: %dmm)", ImageInfo.FocalLength35mmEquiv); 1724 } 1725 printf("\n"); 1726 } 1727 1728 if (ImageInfo.DigitalZoomRatio > 1){ 1729 // Digital zoom used. Shame on you! 1730 printf("Digital Zoom : %1.3fx\n", (double)ImageInfo.DigitalZoomRatio); 1731 } 1732 1733 if (ImageInfo.CCDWidth){ 1734 printf("CCD width : %4.2fmm\n",(double)ImageInfo.CCDWidth); 1735 } 1736 1737 if (ImageInfo.ExposureTime){ 1738 if (ImageInfo.ExposureTime < 0.010){ 1739 printf("Exposure time: %6.4f s ",(double)ImageInfo.ExposureTime); 1740 }else{ 1741 printf("Exposure time: %5.3f s ",(double)ImageInfo.ExposureTime); 1742 } 1743 if (ImageInfo.ExposureTime <= 0.5){ 1744 printf(" (1/%d)",(int)(0.5 + 1/ImageInfo.ExposureTime)); 1745 } 1746 printf("\n"); 1747 } 1748 if (ImageInfo.ApertureFNumber){ 1749 printf("Aperture : f/%3.1f\n",(double)ImageInfo.ApertureFNumber); 1750 } 1751 if (ImageInfo.Distance){ 1752 if (ImageInfo.Distance < 0){ 1753 printf("Focus dist. : Infinite\n"); 1754 }else{ 1755 printf("Focus dist. : %4.2fm\n",(double)ImageInfo.Distance); 1756 } 1757 } 1758 1759 if (ImageInfo.ISOequivalent){ 1760 printf("ISO equiv. : %2d\n",(int)ImageInfo.ISOequivalent); 1761 } 1762 1763 if (ImageInfo.ExposureBias){ 1764 // If exposure bias was specified, but set to zero, presumably its no bias at all, 1765 // so only show it if its nonzero. 1766 printf("Exposure bias: %4.2f\n",(double)ImageInfo.ExposureBias); 1767 } 1768 1769 switch(ImageInfo.Whitebalance) { 1770 case 1: 1771 printf("Whitebalance : Manual\n"); 1772 break; 1773 case 0: 1774 printf("Whitebalance : Auto\n"); 1775 break; 1776 } 1777 1778 //Quercus: 17-1-2004 Added LightSource, some cams return this, whitebalance or both 1779 switch(ImageInfo.LightSource) { 1780 case 1: 1781 printf("Light Source : Daylight\n"); 1782 break; 1783 case 2: 1784 printf("Light Source : Fluorescent\n"); 1785 break; 1786 case 3: 1787 printf("Light Source : Incandescent\n"); 1788 break; 1789 case 4: 1790 printf("Light Source : Flash\n"); 1791 break; 1792 case 9: 1793 printf("Light Source : Fine weather\n"); 1794 break; 1795 case 11: 1796 printf("Light Source : Shade\n"); 1797 break; 1798 default:; //Quercus: 17-1-2004 There are many more modes for this, check Exif2.2 specs 1799 // If it just says 'unknown' or we don't know it, then 1800 // don't bother showing it - it doesn't add any useful information. 1801 } 1802 1803 if (ImageInfo.MeteringMode){ // 05-jan-2001 vcs 1804 switch(ImageInfo.MeteringMode) { 1805 case 2: 1806 printf("Metering Mode: center weight\n"); 1807 break; 1808 case 3: 1809 printf("Metering Mode: spot\n"); 1810 break; 1811 case 5: 1812 printf("Metering Mode: matrix\n"); 1813 break; 1814 } 1815 } 1816 1817 if (ImageInfo.ExposureProgram){ // 05-jan-2001 vcs 1818 switch(ImageInfo.ExposureProgram) { 1819 case 1: 1820 printf("Exposure : Manual\n"); 1821 break; 1822 case 2: 1823 printf("Exposure : program (auto)\n"); 1824 break; 1825 case 3: 1826 printf("Exposure : aperture priority (semi-auto)\n"); 1827 break; 1828 case 4: 1829 printf("Exposure : shutter priority (semi-auto)\n"); 1830 break; 1831 case 5: 1832 printf("Exposure : Creative Program (based towards depth of field)\n"); 1833 break; 1834 case 6: 1835 printf("Exposure : Action program (based towards fast shutter speed)\n"); 1836 break; 1837 case 7: 1838 printf("Exposure : Portrait Mode\n"); 1839 break; 1840 case 8: 1841 printf("Exposure : LandscapeMode \n"); 1842 break; 1843 default: 1844 break; 1845 } 1846 } 1847 switch(ImageInfo.ExposureMode){ 1848 case 0: // Automatic (not worth cluttering up output for) 1849 break; 1850 case 1: printf("Exposure Mode: Manual\n"); 1851 break; 1852 case 2: printf("Exposure Mode: Auto bracketing\n"); 1853 break; 1854 } 1855 1856 if (ImageInfo.DistanceRange) { 1857 printf("Focus range : "); 1858 switch(ImageInfo.DistanceRange) { 1859 case 1: 1860 printf("macro"); 1861 break; 1862 case 2: 1863 printf("close"); 1864 break; 1865 case 3: 1866 printf("distant"); 1867 break; 1868 } 1869 printf("\n"); 1870 } 1871 1872 1873 1874 if (ImageInfo.Process != M_SOF0){ 1875 // don't show it if its the plain old boring 'baseline' process, but do 1876 // show it if its something else, like 'progressive' (used on web sometimes) 1877 int a; 1878 for (a=0;;a++){ 1879 if (a >= (int)PROCESS_TABLE_SIZE){ 1880 // ran off the end of the table. 1881 printf("Jpeg process : Unknown\n"); 1882 break; 1883 } 1884 if (ProcessTable[a].Tag == ImageInfo.Process){ 1885 printf("Jpeg process : %s\n",ProcessTable[a].Desc); 1886 break; 1887 } 1888 } 1889 } 1890 1891 if (ImageInfo.GpsInfoPresent){ 1892 printf("GPS Latitude : %s\n",ImageInfo.GpsLat); 1893 printf("GPS Longitude: %s\n",ImageInfo.GpsLong); 1894 if (ImageInfo.GpsAlt[0]) printf("GPS Altitude : %s\n",ImageInfo.GpsAlt); 1895 } 1896 1897 // Print the comment. Print 'Comment:' for each new line of comment. 1898 if (ImageInfo.Comments[0]){ 1899 int a,c; 1900 printf("Comment : "); 1901 if (!ImageInfo.CommentWidchars){ 1902 for (a=0;a<MAX_COMMENT_SIZE;a++){ 1903 c = ImageInfo.Comments[a]; 1904 if (c == '\0') break; 1905 if (c == '\n'){ 1906 // Do not start a new line if the string ends with a carriage return. 1907 if (ImageInfo.Comments[a+1] != '\0'){ 1908 printf("\nComment : "); 1909 }else{ 1910 printf("\n"); 1911 } 1912 }else{ 1913 putchar(c); 1914 } 1915 } 1916 printf("\n"); 1917 }else{ 1918 printf("%.*ls\n", ImageInfo.CommentWidchars, (wchar_t *)ImageInfo.Comments); 1919 } 1920 } 1921 if (ImageInfo.ThumbnailOffset){ 1922 printf("Map: %05d-%05d: Thumbnail\n",ImageInfo.ThumbnailOffset, ImageInfo.ThumbnailOffset+ImageInfo.ThumbnailSize); 1923 } else { 1924 printf("NO thumbnail"); 1925 } 1926} 1927 1928 1929//-------------------------------------------------------------------------- 1930// Summarize highlights of image info on one line (suitable for grep-ing) 1931//-------------------------------------------------------------------------- 1932void ShowConciseImageInfo(void) 1933{ 1934 printf("\"%s\"",ImageInfo.FileName); 1935 1936 printf(" %dx%d",ImageInfo.Width, ImageInfo.Height); 1937 1938 if (ImageInfo.ExposureTime){ 1939 if (ImageInfo.ExposureTime <= 0.5){ 1940 printf(" (1/%d)",(int)(0.5 + 1/ImageInfo.ExposureTime)); 1941 }else{ 1942 printf(" (%1.1f)",ImageInfo.ExposureTime); 1943 } 1944 } 1945 1946 if (ImageInfo.ApertureFNumber){ 1947 printf(" f/%3.1f",(double)ImageInfo.ApertureFNumber); 1948 } 1949 1950 if (ImageInfo.FocalLength35mmEquiv){ 1951 printf(" f(35)=%dmm",ImageInfo.FocalLength35mmEquiv); 1952 } 1953 1954 if (ImageInfo.FlashUsed >= 0 && ImageInfo.FlashUsed & 1){ 1955 printf(" (flash)"); 1956 } 1957 1958 if (ImageInfo.IsColor == 0){ 1959 printf(" (bw)"); 1960 } 1961 1962 printf("\n"); 1963} 1964