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 LOGE
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_USHORT, 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
TagNameToValue(const char * tagName)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 //--------------------------------------------------------------------------
315 // Convert a 16 bit unsigned value to file's native byte order
316 //--------------------------------------------------------------------------
Put16u(void * Short,unsigned short PutValue)317 static void Put16u(void * Short, unsigned short PutValue)
318 {
319 if (MotorolaOrder){
320 ((uchar *)Short)[0] = (uchar)(PutValue>>8);
321 ((uchar *)Short)[1] = (uchar)PutValue;
322 }else{
323 ((uchar *)Short)[0] = (uchar)PutValue;
324 ((uchar *)Short)[1] = (uchar)(PutValue>>8);
325 }
326 }
327
328 //--------------------------------------------------------------------------
329 // Convert a 16 bit unsigned value from file's native byte order
330 //--------------------------------------------------------------------------
Get16u(void * Short)331 int Get16u(void * Short)
332 {
333 if (MotorolaOrder){
334 return (((uchar *)Short)[0] << 8) | ((uchar *)Short)[1];
335 }else{
336 return (((uchar *)Short)[1] << 8) | ((uchar *)Short)[0];
337 }
338 }
339
340 //--------------------------------------------------------------------------
341 // Convert a 32 bit signed value from file's native byte order
342 //--------------------------------------------------------------------------
Get32s(void * Long)343 int Get32s(void * Long)
344 {
345 if (MotorolaOrder){
346 return ((( char *)Long)[0] << 24) | (((uchar *)Long)[1] << 16)
347 | (((uchar *)Long)[2] << 8 ) | (((uchar *)Long)[3] << 0 );
348 }else{
349 return ((( char *)Long)[3] << 24) | (((uchar *)Long)[2] << 16)
350 | (((uchar *)Long)[1] << 8 ) | (((uchar *)Long)[0] << 0 );
351 }
352 }
353
354 //--------------------------------------------------------------------------
355 // Convert a 32 bit unsigned value to file's native byte order
356 //--------------------------------------------------------------------------
Put32u(void * Value,unsigned PutValue)357 void Put32u(void * Value, unsigned PutValue)
358 {
359 if (MotorolaOrder){
360 ((uchar *)Value)[0] = (uchar)(PutValue>>24);
361 ((uchar *)Value)[1] = (uchar)(PutValue>>16);
362 ((uchar *)Value)[2] = (uchar)(PutValue>>8);
363 ((uchar *)Value)[3] = (uchar)PutValue;
364 }else{
365 ((uchar *)Value)[0] = (uchar)PutValue;
366 ((uchar *)Value)[1] = (uchar)(PutValue>>8);
367 ((uchar *)Value)[2] = (uchar)(PutValue>>16);
368 ((uchar *)Value)[3] = (uchar)(PutValue>>24);
369 }
370 }
371
372 //--------------------------------------------------------------------------
373 // Convert a 32 bit unsigned value from file's native byte order
374 //--------------------------------------------------------------------------
Get32u(void * Long)375 unsigned Get32u(void * Long)
376 {
377 return (unsigned)Get32s(Long) & 0xffffffff;
378 }
379
380 //--------------------------------------------------------------------------
381 // Display a number as one of its many formats
382 //--------------------------------------------------------------------------
PrintFormatNumber(void * ValuePtr,int Format,int ByteCount)383 void PrintFormatNumber(void * ValuePtr, int Format, int ByteCount)
384 {
385 int s,n;
386
387 for(n=0;n<16;n++){
388 switch(Format){
389 case FMT_SBYTE:
390 case FMT_BYTE: printf("%02x",*(uchar *)ValuePtr); s=1; break;
391 case FMT_USHORT: printf("%d",Get16u(ValuePtr)); s=2; break;
392 case FMT_ULONG:
393 case FMT_SLONG: printf("%d",Get32s(ValuePtr)); s=4; break;
394 case FMT_SSHORT: printf("%hd",(signed short)Get16u(ValuePtr)); s=2; break;
395 case FMT_URATIONAL:
396 case FMT_SRATIONAL:
397 printf("%d/%d",Get32s(ValuePtr), Get32s(4+(char *)ValuePtr));
398 s = 8;
399 break;
400
401 case FMT_SINGLE: printf("%f",(double)*(float *)ValuePtr); s=8; break;
402 case FMT_DOUBLE: printf("%f",*(double *)ValuePtr); s=8; break;
403 default:
404 printf("Unknown format %d:", Format);
405 return;
406 }
407 ByteCount -= s;
408 if (ByteCount <= 0) break;
409 printf(", ");
410 ValuePtr = (void *)((char *)ValuePtr + s);
411
412 }
413 if (n >= 16) printf("...");
414 }
415
416
417 //--------------------------------------------------------------------------
418 // Evaluate number, be it int, rational, or float from directory.
419 //--------------------------------------------------------------------------
ConvertAnyFormat(void * ValuePtr,int Format)420 double ConvertAnyFormat(void * ValuePtr, int Format)
421 {
422 double Value;
423 Value = 0;
424
425 switch(Format){
426 case FMT_SBYTE: Value = *(signed char *)ValuePtr; break;
427 case FMT_BYTE: Value = *(uchar *)ValuePtr; break;
428
429 case FMT_USHORT: Value = Get16u(ValuePtr); break;
430 case FMT_ULONG: Value = Get32u(ValuePtr); break;
431
432 case FMT_URATIONAL:
433 case FMT_SRATIONAL:
434 {
435 int Num,Den;
436 Num = Get32s(ValuePtr);
437 Den = Get32s(4+(char *)ValuePtr);
438 if (Den == 0){
439 Value = 0;
440 }else{
441 Value = (double)Num/Den;
442 }
443 break;
444 }
445
446 case FMT_SSHORT: Value = (signed short)Get16u(ValuePtr); break;
447 case FMT_SLONG: Value = Get32s(ValuePtr); break;
448
449 // Not sure if this is correct (never seen float used in Exif format)
450 case FMT_SINGLE: Value = (double)*(float *)ValuePtr; break;
451 case FMT_DOUBLE: Value = *(double *)ValuePtr; break;
452
453 default:
454 ErrNonfatal("Illegal format code %d",Format,0);
455 }
456 return Value;
457 }
458
459 //--------------------------------------------------------------------------
460 // Process one of the nested EXIF directories.
461 //--------------------------------------------------------------------------
ProcessExifDir(unsigned char * DirStart,unsigned char * OffsetBase,unsigned ExifLength,int NestingLevel)462 static void ProcessExifDir(unsigned char * DirStart, unsigned char * OffsetBase,
463 unsigned ExifLength, int NestingLevel)
464 {
465 int de;
466 int a;
467 int NumDirEntries;
468 unsigned ThumbnailOffset = 0;
469 unsigned ThumbnailSize = 0;
470 char IndentString[25];
471
472 printf("ProcessExifDir");
473 if (NestingLevel > 4){
474 ErrNonfatal("Maximum directory nesting exceeded (corrupt exif header)", 0,0);
475 return;
476 }
477
478 memset(IndentString, ' ', 25);
479 IndentString[NestingLevel * 4] = '\0';
480
481
482 NumDirEntries = Get16u(DirStart);
483 #define DIR_ENTRY_ADDR(Start, Entry) (Start+2+12*(Entry))
484
485 {
486 unsigned char * DirEnd;
487 DirEnd = DIR_ENTRY_ADDR(DirStart, NumDirEntries);
488 if (DirEnd+4 > (OffsetBase+ExifLength)){
489 if (DirEnd+2 == OffsetBase+ExifLength || DirEnd == OffsetBase+ExifLength){
490 // Version 1.3 of jhead would truncate a bit too much.
491 // This also caught later on as well.
492 }else{
493 ErrNonfatal("Illegally sized exif subdirectory (%d entries)",NumDirEntries,0);
494 return;
495 }
496 }
497 if (DumpExifMap){
498 printf("Map: %05d-%05d: Directory\n",(int)(DirStart-OffsetBase), (int)(DirEnd+4-OffsetBase));
499 }
500
501
502 }
503
504 if (ShowTags){
505 printf("(dir has %d entries)\n",NumDirEntries);
506 }
507
508 for (de=0;de<NumDirEntries;de++){
509 int Tag, Format, Components;
510 unsigned char * ValuePtr;
511 int ByteCount;
512 unsigned char * DirEntry;
513 DirEntry = DIR_ENTRY_ADDR(DirStart, de);
514
515 Tag = Get16u(DirEntry);
516 Format = Get16u(DirEntry+2);
517 Components = Get32u(DirEntry+4);
518
519 if ((Format-1) >= NUM_FORMATS) {
520 // (-1) catches illegal zero case as unsigned underflows to positive large.
521 ErrNonfatal("Illegal number format %d for tag %04x", Format, Tag);
522 continue;
523 }
524
525 if ((unsigned)Components > 0x10000){
526 ErrNonfatal("Illegal number of components %d for tag %04x", Components, Tag);
527 continue;
528 }
529
530 ByteCount = Components * BytesPerFormat[Format];
531
532 if (ByteCount > 4){
533 unsigned OffsetVal;
534 OffsetVal = Get32u(DirEntry+8);
535 // If its bigger than 4 bytes, the dir entry contains an offset.
536 if (OffsetVal+ByteCount > ExifLength){
537 // Bogus pointer offset and / or bytecount value
538 ErrNonfatal("Illegal value pointer for tag %04x", Tag,0);
539 continue;
540 }
541 ValuePtr = OffsetBase+OffsetVal;
542
543 if (OffsetVal > ImageInfo.LargestExifOffset){
544 ImageInfo.LargestExifOffset = OffsetVal;
545 }
546
547 if (DumpExifMap){
548 printf("Map: %05d-%05d: Data for tag %04x\n",OffsetVal, OffsetVal+ByteCount, Tag);
549 }
550 }else{
551 // 4 bytes or less and value is in the dir entry itself
552 ValuePtr = DirEntry+8;
553 }
554
555 if (Tag == TAG_MAKER_NOTE){
556 if (ShowTags){
557 printf("%s Maker note: ",IndentString);
558 }
559 ProcessMakerNote(ValuePtr, ByteCount, OffsetBase, ExifLength);
560 continue;
561 }
562
563 if (ShowTags){
564 // Show tag name
565 for (a=0;;a++){
566 if (a >= (int)TAG_TABLE_SIZE){
567 printf(IndentString);
568 printf(" Unknown Tag %04x Value = ", Tag);
569 break;
570 }
571 if (TagTable[a].Tag == Tag){
572 printf(IndentString);
573 printf(" %s = ",TagTable[a].Desc);
574 break;
575 }
576 }
577
578 // Show tag value.
579 switch(Format){
580 case FMT_BYTE:
581 if(ByteCount>1){
582 printf("%.*ls\n", ByteCount/2, (wchar_t *)ValuePtr);
583 }else{
584 PrintFormatNumber(ValuePtr, Format, ByteCount);
585 printf("\n");
586 }
587 break;
588
589 case FMT_UNDEFINED:
590 // Undefined is typically an ascii string.
591
592 case FMT_STRING:
593 // String arrays printed without function call (different from int arrays)
594 {
595 printf("\"%s\"", ValuePtr);
596 // int NoPrint = 0;
597 // printf("\"");
598 // for (a=0;a<ByteCount;a++){
599 // if (ValuePtr[a] >= 32){
600 // putchar(ValuePtr[a]);
601 // NoPrint = 0;
602 // }else{
603 // // Avoiding indicating too many unprintable characters of proprietary
604 // // bits of binary information this program may not know how to parse.
605 // if (!NoPrint && a != ByteCount-1){
606 // putchar('?');
607 // NoPrint = 1;
608 // }
609 // }
610 // }
611 // printf("\"\n");
612 }
613 break;
614
615 default:
616 // Handle arrays of numbers later (will there ever be?)
617 PrintFormatNumber(ValuePtr, Format, ByteCount);
618 printf("\n");
619 }
620 }
621
622 // Extract useful components of tag
623 switch(Tag){
624
625 case TAG_MAKE:
626 strncpy(ImageInfo.CameraMake, (char *)ValuePtr, ByteCount < 31 ? ByteCount : 31);
627 break;
628
629 case TAG_MODEL:
630 strncpy(ImageInfo.CameraModel, (char *)ValuePtr, ByteCount < 39 ? ByteCount : 39);
631 break;
632
633 case TAG_DATETIME_ORIGINAL:
634 // If we get a DATETIME_ORIGINAL, we use that one.
635 strncpy(ImageInfo.DateTime, (char *)ValuePtr, 19);
636 // Fallthru...
637
638 case TAG_DATETIME_DIGITIZED:
639 case TAG_DATETIME:
640 if (!isdigit(ImageInfo.DateTime[0])){
641 // If we don't already have a DATETIME_ORIGINAL, use whatever
642 // time fields we may have.
643 strncpy(ImageInfo.DateTime, (char *)ValuePtr, 19);
644 }
645
646 if (ImageInfo.numDateTimeTags >= MAX_DATE_COPIES){
647 ErrNonfatal("More than %d date fields! This is nuts", MAX_DATE_COPIES, 0);
648 break;
649 }
650 ImageInfo.DateTimeOffsets[ImageInfo.numDateTimeTags++] =
651 (char *)ValuePtr - (char *)OffsetBase;
652 break;
653
654 case TAG_WINXP_COMMENT:
655 if (ImageInfo.Comments[0]){ // We already have a jpeg comment.
656 // Already have a comment (probably windows comment), skip this one.
657 if (ShowTags) printf("Windows XP commend and other comment in header\n");
658 break; // Already have a windows comment, skip this one.
659 }
660
661 if (ByteCount > 1){
662 if (ByteCount > MAX_COMMENT_SIZE) ByteCount = MAX_COMMENT_SIZE;
663 memcpy(ImageInfo.Comments, ValuePtr, ByteCount);
664 ImageInfo.CommentWidchars = ByteCount/2;
665 }
666 break;
667
668 case TAG_USERCOMMENT:
669 if (ImageInfo.Comments[0]){ // We already have a jpeg comment.
670 // Already have a comment (probably windows comment), skip this one.
671 if (ShowTags) printf("Multiple comments in exif header\n");
672 break; // Already have a windows comment, skip this one.
673 }
674
675 // Comment is often padded with trailing spaces. Remove these first.
676 for (a=ByteCount;;){
677 a--;
678 if ((ValuePtr)[a] == ' '){
679 (ValuePtr)[a] = '\0';
680 }else{
681 break;
682 }
683 if (a == 0) break;
684 }
685
686 // Copy the comment
687 if (memcmp(ValuePtr, "ASCII",5) == 0){
688 for (a=5;a<10;a++){
689 int c;
690 c = (ValuePtr)[a];
691 if (c != '\0' && c != ' '){
692 strncpy(ImageInfo.Comments, (char *)ValuePtr+a, 199);
693 break;
694 }
695 }
696 }else{
697 strncpy(ImageInfo.Comments, (char *)ValuePtr, MAX_COMMENT_SIZE-1);
698 }
699 break;
700
701 case TAG_FNUMBER:
702 // Simplest way of expressing aperture, so I trust it the most.
703 // (overwrite previously computd value if there is one)
704 ImageInfo.ApertureFNumber = (float)ConvertAnyFormat(ValuePtr, Format);
705 break;
706
707 case TAG_APERTURE:
708 case TAG_MAXAPERTURE:
709 // More relevant info always comes earlier, so only use this field if we don't
710 // have appropriate aperture information yet.
711 if (ImageInfo.ApertureFNumber == 0){
712 ImageInfo.ApertureFNumber
713 = (float)exp(ConvertAnyFormat(ValuePtr, Format)*log(2)*0.5);
714 }
715 break;
716
717 case TAG_FOCALLENGTH:
718 // Nice digital cameras actually save the focal length as a function
719 // of how farthey are zoomed in.
720 ImageInfo.FocalLength = (float)ConvertAnyFormat(ValuePtr, Format);
721 break;
722
723 case TAG_SUBJECT_DISTANCE:
724 // Inidcates the distacne the autofocus camera is focused to.
725 // Tends to be less accurate as distance increases.
726 ImageInfo.Distance = (float)ConvertAnyFormat(ValuePtr, Format);
727 break;
728
729 case TAG_EXPOSURETIME:
730 // Simplest way of expressing exposure time, so I trust it most.
731 // (overwrite previously computd value if there is one)
732 ImageInfo.ExposureTime = (float)ConvertAnyFormat(ValuePtr, Format);
733 break;
734
735 case TAG_SHUTTERSPEED:
736 // More complicated way of expressing exposure time, so only use
737 // this value if we don't already have it from somewhere else.
738 if (ImageInfo.ExposureTime == 0){
739 ImageInfo.ExposureTime
740 = (float)(1/exp(ConvertAnyFormat(ValuePtr, Format)*log(2)));
741 }
742 break;
743
744
745 case TAG_FLASH:
746 ImageInfo.FlashUsed=(int)ConvertAnyFormat(ValuePtr, Format);
747 break;
748
749 case TAG_ORIENTATION:
750 if (NumOrientations >= 2){
751 // Can have another orientation tag for the thumbnail, but if there's
752 // a third one, things are stringae.
753 ErrNonfatal("More than two orientation tags!",0,0);
754 break;
755 }
756 OrientationPtr[NumOrientations] = ValuePtr;
757 OrientationNumFormat[NumOrientations] = Format;
758 if (NumOrientations == 0){
759 ImageInfo.Orientation = (int)ConvertAnyFormat(ValuePtr, Format);
760 }
761 if (ImageInfo.Orientation < 0 || ImageInfo.Orientation > 8){
762 ErrNonfatal("Undefined rotation value %d", ImageInfo.Orientation, 0);
763 ImageInfo.Orientation = 0;
764 }
765 NumOrientations += 1;
766 break;
767
768 case TAG_EXIF_IMAGELENGTH:
769 case TAG_EXIF_IMAGEWIDTH:
770 // Use largest of height and width to deal with images that have been
771 // rotated to portrait format.
772 a = (int)ConvertAnyFormat(ValuePtr, Format);
773 if (ExifImageWidth < a) ExifImageWidth = a;
774 break;
775
776 case TAG_FOCAL_PLANE_XRES:
777 FocalplaneXRes = ConvertAnyFormat(ValuePtr, Format);
778 break;
779
780 case TAG_FOCAL_PLANE_UNITS:
781 switch((int)ConvertAnyFormat(ValuePtr, Format)){
782 case 1: FocalplaneUnits = 25.4; break; // inch
783 case 2:
784 // According to the information I was using, 2 means meters.
785 // But looking at the Cannon powershot's files, inches is the only
786 // sensible value.
787 FocalplaneUnits = 25.4;
788 break;
789
790 case 3: FocalplaneUnits = 10; break; // centimeter
791 case 4: FocalplaneUnits = 1; break; // millimeter
792 case 5: FocalplaneUnits = .001; break; // micrometer
793 }
794 break;
795
796 case TAG_EXPOSURE_BIAS:
797 ImageInfo.ExposureBias = (float)ConvertAnyFormat(ValuePtr, Format);
798 break;
799
800 case TAG_WHITEBALANCE:
801 ImageInfo.Whitebalance = (int)ConvertAnyFormat(ValuePtr, Format);
802 break;
803
804 case TAG_LIGHT_SOURCE:
805 ImageInfo.LightSource = (int)ConvertAnyFormat(ValuePtr, Format);
806 break;
807
808 case TAG_METERING_MODE:
809 ImageInfo.MeteringMode = (int)ConvertAnyFormat(ValuePtr, Format);
810 break;
811
812 case TAG_EXPOSURE_PROGRAM:
813 ImageInfo.ExposureProgram = (int)ConvertAnyFormat(ValuePtr, Format);
814 break;
815
816 case TAG_EXPOSURE_INDEX:
817 if (ImageInfo.ISOequivalent == 0){
818 // Exposure index and ISO equivalent are often used interchangeably,
819 // so we will do the same in jhead.
820 // http://photography.about.com/library/glossary/bldef_ei.htm
821 ImageInfo.ISOequivalent = (int)ConvertAnyFormat(ValuePtr, Format);
822 }
823 break;
824
825 case TAG_EXPOSURE_MODE:
826 ImageInfo.ExposureMode = (int)ConvertAnyFormat(ValuePtr, Format);
827 break;
828
829 case TAG_ISO_EQUIVALENT:
830 ImageInfo.ISOequivalent = (int)ConvertAnyFormat(ValuePtr, Format);
831 if ( ImageInfo.ISOequivalent < 50 ){
832 // Fixes strange encoding on some older digicams.
833 ImageInfo.ISOequivalent *= 200;
834 }
835 break;
836
837 case TAG_DIGITALZOOMRATIO:
838 ImageInfo.DigitalZoomRatio = (float)ConvertAnyFormat(ValuePtr, Format);
839 break;
840
841 case TAG_THUMBNAIL_OFFSET:
842 ThumbnailOffset = (unsigned)ConvertAnyFormat(ValuePtr, Format);
843 DirWithThumbnailPtrs = DirStart;
844 break;
845
846 case TAG_THUMBNAIL_LENGTH:
847 ThumbnailSize = (unsigned)ConvertAnyFormat(ValuePtr, Format);
848 ImageInfo.ThumbnailSizeOffset = ValuePtr-OffsetBase;
849 break;
850
851 case TAG_EXIF_OFFSET:
852 if (ShowTags) printf("%s Exif Dir:",IndentString);
853
854 case TAG_INTEROP_OFFSET:
855 if (Tag == TAG_INTEROP_OFFSET && ShowTags) printf("%s Interop Dir:",IndentString);
856 {
857 unsigned char * SubdirStart;
858 SubdirStart = OffsetBase + Get32u(ValuePtr);
859 if (SubdirStart < OffsetBase || SubdirStart > OffsetBase+ExifLength){
860 ErrNonfatal("Illegal exif or interop ofset directory link",0,0);
861 }else{
862 ProcessExifDir(SubdirStart, OffsetBase, ExifLength, NestingLevel+1);
863 }
864 continue;
865 }
866 break;
867
868 case TAG_GPSINFO:
869 if (ShowTags) printf("%s GPS info dir:",IndentString);
870 {
871 unsigned char * SubdirStart;
872 SubdirStart = OffsetBase + Get32u(ValuePtr);
873 if (SubdirStart < OffsetBase || SubdirStart > OffsetBase+ExifLength){
874 ErrNonfatal("Illegal GPS directory link",0,0);
875 }else{
876 ProcessGpsInfo(SubdirStart, ByteCount, OffsetBase, ExifLength);
877 }
878 continue;
879 }
880 break;
881
882 case TAG_FOCALLENGTH_35MM:
883 // The focal length equivalent 35 mm is a 2.2 tag (defined as of April 2002)
884 // if its present, use it to compute equivalent focal length instead of
885 // computing it from sensor geometry and actual focal length.
886 ImageInfo.FocalLength35mmEquiv = (unsigned)ConvertAnyFormat(ValuePtr, Format);
887 break;
888
889 case TAG_DISTANCE_RANGE:
890 // Three possible standard values:
891 // 1 = macro, 2 = close, 3 = distant
892 ImageInfo.DistanceRange = (int)ConvertAnyFormat(ValuePtr, Format);
893 break;
894 }
895 }
896
897
898 {
899 // In addition to linking to subdirectories via exif tags,
900 // there's also a potential link to another directory at the end of each
901 // directory. this has got to be the result of a committee!
902 unsigned char * SubdirStart;
903 unsigned Offset;
904
905 if (DIR_ENTRY_ADDR(DirStart, NumDirEntries) + 4 <= OffsetBase+ExifLength){
906 printf("DirStart %d offset from dirstart %d", (int)DirStart, 2+12*NumDirEntries);
907 Offset = Get32u(DirStart+2+12*NumDirEntries);
908 if (Offset){
909 SubdirStart = OffsetBase + Offset;
910 if (SubdirStart > OffsetBase+ExifLength || SubdirStart < OffsetBase){
911 printf("SubdirStart %d OffsetBase %d ExifLength %d Offset %d",
912 (int)SubdirStart, (int)OffsetBase, ExifLength, Offset);
913 if (SubdirStart > OffsetBase && SubdirStart < OffsetBase+ExifLength+20){
914 // Jhead 1.3 or earlier would crop the whole directory!
915 // As Jhead produces this form of format incorrectness,
916 // I'll just let it pass silently
917 if (ShowTags) printf("Thumbnail removed with Jhead 1.3 or earlier\n");
918 }else{
919 ErrNonfatal("Illegal subdirectory link",0,0);
920 }
921 }else{
922 if (SubdirStart <= OffsetBase+ExifLength){
923 if (ShowTags) printf("%s Continued directory ",IndentString);
924 ProcessExifDir(SubdirStart, OffsetBase, ExifLength, NestingLevel+1);
925 }
926 }
927 if (Offset > ImageInfo.LargestExifOffset){
928 ImageInfo.LargestExifOffset = Offset;
929 }
930 }
931 }else{
932 // The exif header ends before the last next directory pointer.
933 }
934 }
935
936 if (ThumbnailOffset){
937 ImageInfo.ThumbnailAtEnd = FALSE;
938
939 if (DumpExifMap){
940 printf("Map: %05d-%05d: Thumbnail\n",ThumbnailOffset, ThumbnailOffset+ThumbnailSize);
941 }
942
943 if (ThumbnailOffset <= ExifLength){
944 if (ThumbnailSize > ExifLength-ThumbnailOffset){
945 // If thumbnail extends past exif header, only save the part that
946 // actually exists. Canon's EOS viewer utility will do this - the
947 // thumbnail extracts ok with this hack.
948 ThumbnailSize = ExifLength-ThumbnailOffset;
949 if (ShowTags) printf("Thumbnail incorrectly placed in header\n");
950
951 }
952 // The thumbnail pointer appears to be valid. Store it.
953 ImageInfo.ThumbnailOffset = ThumbnailOffset;
954 ImageInfo.ThumbnailSize = ThumbnailSize;
955
956 if (ShowTags){
957 printf("Thumbnail size: %d bytes\n",ThumbnailSize);
958 }
959 }
960 }
961 printf("returning from ProcessExifDir");
962 }
963
964
965 //--------------------------------------------------------------------------
966 // Process a EXIF marker
967 // Describes all the drivel that most digital cameras include...
968 //--------------------------------------------------------------------------
process_EXIF(unsigned char * ExifSection,unsigned int length)969 void process_EXIF (unsigned char * ExifSection, unsigned int length)
970 {
971 int FirstOffset;
972
973 FocalplaneXRes = 0;
974 FocalplaneUnits = 0;
975 ExifImageWidth = 0;
976 NumOrientations = 0;
977
978 if (ShowTags){
979 printf("Exif header %d bytes long\n",length);
980 }
981
982 { // Check the EXIF header component
983 static uchar ExifHeader[] = "Exif\0\0";
984 if (memcmp(ExifSection+2, ExifHeader,6)){
985 ErrNonfatal("Incorrect Exif header",0,0);
986 return;
987 }
988 }
989
990 if (memcmp(ExifSection+8,"II",2) == 0){
991 if (ShowTags) printf("Exif section in Intel order\n");
992 MotorolaOrder = 0;
993 }else{
994 if (memcmp(ExifSection+8,"MM",2) == 0){
995 if (ShowTags) printf("Exif section in Motorola order\n");
996 MotorolaOrder = 1;
997 }else{
998 ErrNonfatal("Invalid Exif alignment marker.",0,0);
999 return;
1000 }
1001 }
1002
1003 // Check the next value for correctness.
1004 if (Get16u(ExifSection+10) != 0x2a){
1005 ErrNonfatal("Invalid Exif start (1)",0,0);
1006 return;
1007 }
1008
1009 FirstOffset = Get32u(ExifSection+12);
1010 if (FirstOffset < 8 || FirstOffset > 16){
1011 // Usually set to 8, but other values valid too.
1012 ErrNonfatal("Suspicious offset of first IFD value",0,0);
1013 return;
1014 }
1015
1016 DirWithThumbnailPtrs = NULL;
1017
1018
1019 // First directory starts 16 bytes in. All offset are relative to 8 bytes in.
1020 ProcessExifDir(ExifSection+8+FirstOffset, ExifSection+8, length-8, 0);
1021
1022 ImageInfo.ThumbnailAtEnd = ImageInfo.ThumbnailOffset >= ImageInfo.LargestExifOffset ? TRUE : FALSE;
1023 #ifdef SUPERDEBUG
1024 printf("Thumbnail %s end", (ImageInfo.ThumbnailAtEnd ? "at" : "NOT at"));
1025 #endif
1026 if (DumpExifMap){
1027 unsigned a,b;
1028 printf("Map: %05d- End of exif\n",length-8);
1029 // for (a=0;a<length-8;a+= 10){
1030 // printf("Map: %05d ",a);
1031 // for (b=0;b<10;b++) printf(" %02x",*(ExifSection+8+a+b));
1032 // printf("\n");
1033 // }
1034 for (a = 0; a < length - 8; ++a) {
1035 unsigned char c = *(ExifSection+8+a);
1036 unsigned pc = isprint(c) ? c : ' ';
1037 printf("Map: %4d %02x %c", a, c, pc);
1038 }
1039 }
1040
1041
1042 // Compute the CCD width, in millimeters.
1043 if (FocalplaneXRes != 0){
1044 // Note: With some cameras, its not possible to compute this correctly because
1045 // they don't adjust the indicated focal plane resolution units when using less
1046 // than maximum resolution, so the CCDWidth value comes out too small. Nothing
1047 // that Jhad can do about it - its a camera problem.
1048 ImageInfo.CCDWidth = (float)(ExifImageWidth * FocalplaneUnits / FocalplaneXRes);
1049
1050 if (ImageInfo.FocalLength && ImageInfo.FocalLength35mmEquiv == 0){
1051 // Compute 35 mm equivalent focal length based on sensor geometry if we haven't
1052 // already got it explicitly from a tag.
1053 ImageInfo.FocalLength35mmEquiv = (int)(ImageInfo.FocalLength/ImageInfo.CCDWidth*36 + 0.5);
1054 }
1055 }
1056 }
1057
TagToTagTableEntry(unsigned short tag)1058 static const TagTable_t* TagToTagTableEntry(unsigned short tag)
1059 {
1060 unsigned int i;
1061 for (i = 0; i < TAG_TABLE_SIZE; i++) {
1062 if (TagTable[i].Tag == tag) {
1063 printf("found tag %d", tag);
1064 int format = TagTable[i].Format;
1065 if (format == 0) {
1066 printf("tag %s format not defined ***** YOU MUST ADD THE FORMAT TO THE TagTable in exif.c!!!!", TagTable[i].Desc);
1067 return NULL;
1068 }
1069 return &TagTable[i];
1070 }
1071 }
1072 printf("tag %d NOT FOUND", tag);
1073 return NULL;
1074 }
1075
writeExifTagAndData(int tag,int format,long components,long value,int valueInString,char * Buffer,int * DirIndex,int * DataWriteIndex)1076 static void writeExifTagAndData(int tag,
1077 int format,
1078 long components,
1079 long value,
1080 int valueInString,
1081 char* Buffer,
1082 int* DirIndex,
1083 int* DataWriteIndex) {
1084 Put16u(Buffer+ (*DirIndex), tag); // Tag
1085 Put16u(Buffer+(*DirIndex) + 2, format); // Format
1086 if (format == FMT_STRING && components == -1) {
1087 components = strlen((char*)value) + 1; // account for null terminator
1088 if (components & 1) ++components; // no odd lengths
1089 }
1090 Put32u(Buffer+(*DirIndex) + 4, components); // Components
1091 printf("# components: %ld", components);
1092 if (format == FMT_STRING) {
1093 // short strings can fit right in the long, otherwise have to
1094 // go in the data area
1095 if (components <= 4) {
1096 strcpy(Buffer+(*DirIndex) + 8, (char*)value);
1097 } else {
1098 Put32u(Buffer+(*DirIndex) + 8, (*DataWriteIndex)-8); // Pointer
1099 printf("copying value %s to %d", (char*)value, (*DataWriteIndex));
1100 strncpy(Buffer+(*DataWriteIndex), (char*)value, components);
1101 (*DataWriteIndex) += components;
1102 }
1103 } else if (!valueInString) {
1104 Put32u(Buffer+(*DirIndex) + 8, value); // Value
1105 } else {
1106 Put32u(Buffer+(*DirIndex) + 8, (*DataWriteIndex)-8); // Pointer
1107 char* curElement = strtok((char*)value, ",");
1108 int i;
1109 for (i = 0; i < components && curElement != NULL; i++) {
1110 #ifdef SUPERDEBUG
1111 printf("processing component %s format %s", curElement, formatStr(format));
1112 #endif
1113 // elements are separated by commas
1114 if (format == FMT_URATIONAL) {
1115 char* separator = strchr(curElement, '/');
1116 if (separator) {
1117 unsigned int numerator = atoi(curElement);
1118 unsigned int denominator = atoi(separator + 1);
1119 Put32u(Buffer+(*DataWriteIndex), numerator);
1120 Put32u(Buffer+(*DataWriteIndex) + 4, denominator);
1121 (*DataWriteIndex) += 8;
1122 }
1123 } else if (format == FMT_SRATIONAL) {
1124 char* separator = strchr(curElement, '/');
1125 if (separator) {
1126 int numerator = atoi(curElement);
1127 int denominator = atoi(separator + 1);
1128 Put32u(Buffer+(*DataWriteIndex), numerator);
1129 Put32u(Buffer+(*DataWriteIndex) + 4, denominator);
1130 (*DataWriteIndex) += 8;
1131 }
1132 } else {
1133 // TODO: doesn't handle multiple components yet -- if more than one, have to put in data write area.
1134 value = atoi(curElement);
1135 Put32u(Buffer+(*DirIndex) + 8, value); // Value
1136 }
1137 curElement = strtok(NULL, ",");
1138 }
1139 }
1140 (*DirIndex) += 12;
1141 }
1142
1143 #ifdef SUPERDEBUG
formatStr(int format)1144 char* formatStr(int format) {
1145 switch (format) {
1146 case FMT_BYTE: return "FMT_BYTE"; break;
1147 case FMT_STRING: return "FMT_STRING"; break;
1148 case FMT_USHORT: return "FMT_USHORT"; break;
1149 case FMT_ULONG: return "FMT_ULONG"; break;
1150 case FMT_URATIONAL: return "FMT_URATIONAL"; break;
1151 case FMT_SBYTE: return "FMT_SBYTE"; break;
1152 case FMT_UNDEFINED: return "FMT_UNDEFINED"; break;
1153 case FMT_SSHORT: return "FMT_SSHORT"; break;
1154 case FMT_SLONG: return "FMT_SLONG"; break;
1155 case FMT_SRATIONAL: return "FMT_SRATIONAL"; break;
1156 case FMT_SINGLE: return "FMT_SINGLE"; break;
1157 case FMT_DOUBLE: return "FMT_SINGLE"; break;
1158 default: return "UNKNOWN";
1159 }
1160 }
1161 #endif
1162
1163 //--------------------------------------------------------------------------
1164 // Create minimal exif header - just date and thumbnail pointers,
1165 // so that date and thumbnail may be filled later.
1166 //--------------------------------------------------------------------------
create_EXIF(ExifElement_t * elements,int exifTagCount,int gpsTagCount)1167 void create_EXIF(ExifElement_t* elements, int exifTagCount, int gpsTagCount)
1168 {
1169 // TODO: We need to dynamically allocate this buffer and resize it when
1170 // necessary while writing so we don't do a buffer overflow.
1171 char Buffer[1024];
1172
1173 unsigned short NumEntries;
1174 int DataWriteIndex;
1175 int DirIndex;
1176 int DirContinuation = 0;
1177
1178 #ifdef SUPERDEBUG
1179 LOGE("create_EXIF %d exif elements, %d gps elements", exifTagCount, gpsTagCount);
1180 #endif
1181
1182 MotorolaOrder = 0;
1183
1184 memcpy(Buffer+2, "Exif\0\0II",8);
1185 Put16u(Buffer+10, 0x2a);
1186
1187 DataWriteIndex = 16;
1188 Put32u(Buffer+12, DataWriteIndex-8); // first IFD offset. Means start 16 bytes in.
1189
1190 {
1191 DirIndex = DataWriteIndex;
1192 NumEntries = 2 + exifTagCount; // the two extra are the datetime and the thumbnail
1193 if (gpsTagCount) {
1194 ++NumEntries; // allow for the GPS info tag
1195 }
1196 DataWriteIndex += 2 + NumEntries*12 + 4;
1197
1198 Put16u(Buffer+DirIndex, NumEntries); // Number of entries
1199 DirIndex += 2;
1200
1201 // Entries go here...
1202 {
1203 // Date/time entry
1204 char* dateTime = NULL;
1205 char dateBuf[20];
1206 if (ImageInfo.numDateTimeTags){
1207 // If we had a pre-existing exif header, use time from that.
1208 dateTime = ImageInfo.DateTime;
1209 } else {
1210 // Oterwise, use the file's timestamp.
1211 FileTimeAsString(dateBuf);
1212 dateTime = dateBuf;
1213 }
1214 writeExifTagAndData(TAG_DATETIME,
1215 FMT_STRING,
1216 20,
1217 (long)(char*)dateBuf,
1218 FALSE,
1219 Buffer,
1220 &DirIndex,
1221 &DataWriteIndex);
1222
1223 }
1224 if (exifTagCount > 0) {
1225 int i;
1226 for (i = 0; i < exifTagCount + gpsTagCount; i++) {
1227 if (elements[i].GpsTag) {
1228 continue;
1229 }
1230 const TagTable_t* entry = TagToTagTableEntry(elements[i].Tag);
1231 if (entry == NULL) {
1232 continue;
1233 }
1234 #ifdef SUPERDEBUG
1235 LOGE("create_EXIF saving tag %x value \"%s\"",elements[i].Tag, elements[i].Value);
1236 #endif
1237 writeExifTagAndData(elements[i].Tag,
1238 entry->Format,
1239 entry->DataLength,
1240 (long)elements[i].Value,
1241 TRUE,
1242 Buffer,
1243 &DirIndex,
1244 &DataWriteIndex);
1245 }
1246
1247 if (gpsTagCount) {
1248 // Link to gps dir entry
1249 writeExifTagAndData(TAG_GPSINFO,
1250 FMT_ULONG,
1251 1,
1252 DataWriteIndex-8,
1253 FALSE,
1254 Buffer,
1255 &DirIndex,
1256 &DataWriteIndex);
1257 }
1258
1259 // Link to exif dir entry
1260 int exifDirPtr = DataWriteIndex-8;
1261 if (gpsTagCount) {
1262 exifDirPtr += 2 + gpsTagCount*12 + 4;
1263 }
1264 DirContinuation = DirIndex;
1265 writeExifTagAndData(TAG_EXIF_OFFSET,
1266 FMT_ULONG,
1267 1,
1268 exifDirPtr,
1269 FALSE,
1270 Buffer,
1271 &DirIndex,
1272 &DataWriteIndex);
1273 }
1274
1275 // End of directory - contains optional link to continued directory.
1276 DirContinuation = DirIndex;
1277 printf("Ending Exif section DirIndex = %d DataWriteIndex %d", DirIndex, DataWriteIndex);
1278 }
1279
1280
1281 // GPS Section
1282 if (gpsTagCount) {
1283 DirIndex = DataWriteIndex;
1284 printf("Starting GPS section DirIndex = %d", DirIndex);
1285 NumEntries = gpsTagCount;
1286 DataWriteIndex += 2 + NumEntries*12 + 4;
1287
1288 Put16u(Buffer+DirIndex, NumEntries); // Number of entries
1289 DirIndex += 2;
1290 {
1291 int i;
1292 for (i = 0; i < exifTagCount + gpsTagCount; i++) {
1293 if (!elements[i].GpsTag) {
1294 continue;
1295 }
1296 const TagTable_t* entry = GpsTagToTagTableEntry(elements[i].Tag);
1297 if (entry == NULL) {
1298 continue;
1299 }
1300 #ifdef SUPERDEBUG
1301 LOGE("create_EXIF saving GPS tag %x value \"%s\"",elements[i].Tag, elements[i].Value);
1302 #endif
1303 writeExifTagAndData(elements[i].Tag,
1304 entry->Format,
1305 entry->DataLength,
1306 (long)elements[i].Value,
1307 TRUE,
1308 Buffer,
1309 &DirIndex,
1310 &DataWriteIndex);
1311 }
1312 }
1313
1314 // End of directory - contains optional link to continued directory.
1315 Put32u(Buffer+DirIndex, 0);
1316 printf("Ending GPS section DirIndex = %d DataWriteIndex %d", DirIndex, DataWriteIndex);
1317 }
1318
1319 {
1320 //Continuation which links to this directory;
1321 Put32u(Buffer+DirContinuation, DataWriteIndex-8);
1322
1323 printf("Starting Thumbnail section DirIndex = %d", DirIndex);
1324 DirIndex = DataWriteIndex;
1325 NumEntries = 2;
1326 DataWriteIndex += 2 + NumEntries*12 + 4;
1327
1328 Put16u(Buffer+DirIndex, NumEntries); // Number of entries
1329 DirIndex += 2;
1330 {
1331 // Link to exif dir entry
1332 writeExifTagAndData(TAG_THUMBNAIL_OFFSET,
1333 FMT_ULONG,
1334 1,
1335 DataWriteIndex-8,
1336 FALSE,
1337 Buffer,
1338 &DirIndex,
1339 &DataWriteIndex);
1340 }
1341
1342 {
1343 // Link to exif dir entry
1344 writeExifTagAndData(TAG_THUMBNAIL_LENGTH,
1345 FMT_ULONG,
1346 1,
1347 0,
1348 FALSE,
1349 Buffer,
1350 &DirIndex,
1351 &DataWriteIndex);
1352 }
1353
1354 // End of directory - contains optional link to continued directory.
1355 Put32u(Buffer+DirIndex, 0);
1356 printf("Ending Thumbnail section DirIndex = %d DataWriteIndex %d", DirIndex, DataWriteIndex);
1357 }
1358
1359
1360 Buffer[0] = (unsigned char)(DataWriteIndex >> 8);
1361 Buffer[1] = (unsigned char)DataWriteIndex;
1362
1363 // Remove old exif section, if there was one.
1364 RemoveSectionType(M_EXIF);
1365
1366 {
1367 // Sections need malloced buffers, so do that now, especially because
1368 // we now know how big it needs to be allocated.
1369 unsigned char * NewBuf = malloc(DataWriteIndex);
1370 if (NewBuf == NULL){
1371 ErrFatal("Could not allocate memory");
1372 }
1373 memcpy(NewBuf, Buffer, DataWriteIndex);
1374
1375 CreateSection(M_EXIF, NewBuf, DataWriteIndex);
1376
1377 // Re-parse new exif section, now that its in place
1378 // otherwise, we risk touching data that has already been freed.
1379 process_EXIF(NewBuf, DataWriteIndex);
1380 }
1381 }
1382
1383 //--------------------------------------------------------------------------
1384 // Cler the rotation tag in the exif header to 1.
1385 //--------------------------------------------------------------------------
ClearOrientation(void)1386 const char * ClearOrientation(void)
1387 {
1388 int a;
1389 if (NumOrientations == 0) return NULL;
1390
1391 for (a=0;a<NumOrientations;a++){
1392 switch(OrientationNumFormat[a]){
1393 case FMT_SBYTE:
1394 case FMT_BYTE:
1395 *(uchar *)(OrientationPtr[a]) = 1;
1396 break;
1397
1398 case FMT_USHORT:
1399 Put16u(OrientationPtr[a], 1);
1400 break;
1401
1402 case FMT_ULONG:
1403 case FMT_SLONG:
1404 memset(OrientationPtr, 0, 4);
1405 // Can't be bothered to write generic Put32 if I only use it once.
1406 if (MotorolaOrder){
1407 ((uchar *)OrientationPtr[a])[3] = 1;
1408 }else{
1409 ((uchar *)OrientationPtr[a])[0] = 1;
1410 }
1411 break;
1412
1413 default:
1414 return NULL;
1415 }
1416 }
1417
1418 return OrientTab[ImageInfo.Orientation];
1419 }
1420
1421
1422
1423 //--------------------------------------------------------------------------
1424 // Remove thumbnail out of the exif image.
1425 //--------------------------------------------------------------------------
RemoveThumbnail(unsigned char * ExifSection)1426 int RemoveThumbnail(unsigned char * ExifSection)
1427 {
1428 if (!DirWithThumbnailPtrs ||
1429 ImageInfo.ThumbnailOffset == 0 ||
1430 ImageInfo.ThumbnailSize == 0){
1431 // No thumbnail, or already deleted it.
1432 return 0;
1433 }
1434 if (ImageInfo.ThumbnailAtEnd == FALSE){
1435 ErrNonfatal("Thumbnail is not at end of header, can't chop it off", 0, 0);
1436 return 0;
1437 }
1438
1439 {
1440 int de;
1441 int NumDirEntries;
1442 NumDirEntries = Get16u(DirWithThumbnailPtrs);
1443
1444 for (de=0;de<NumDirEntries;de++){
1445 int Tag;
1446 unsigned char * DirEntry;
1447 DirEntry = DIR_ENTRY_ADDR(DirWithThumbnailPtrs, de);
1448 Tag = Get16u(DirEntry);
1449 if (Tag == TAG_THUMBNAIL_LENGTH){
1450 // Set length to zero.
1451 if (Get16u(DirEntry+2) != FMT_ULONG){
1452 // non standard format encoding. Can't do it.
1453 ErrNonfatal("Can't remove thumbnail", 0, 0);
1454 return 0;
1455 }
1456 Put32u(DirEntry+8, 0);
1457 }
1458 }
1459 }
1460
1461 // This is how far the non thumbnail data went.
1462 return ImageInfo.ThumbnailOffset+8;
1463
1464 }
1465
1466
1467 //--------------------------------------------------------------------------
1468 // Convert exif time to Unix time structure
1469 //--------------------------------------------------------------------------
Exif2tm(struct tm * timeptr,char * ExifTime)1470 int Exif2tm(struct tm * timeptr, char * ExifTime)
1471 {
1472 int a;
1473
1474 timeptr->tm_wday = -1;
1475
1476 // Check for format: YYYY:MM:DD HH:MM:SS format.
1477 // Date and time normally separated by a space, but also seen a ':' there, so
1478 // skip the middle space with '%*c' so it can be any character.
1479 a = sscanf(ExifTime, "%d%*c%d%*c%d%*c%d:%d:%d",
1480 &timeptr->tm_year, &timeptr->tm_mon, &timeptr->tm_mday,
1481 &timeptr->tm_hour, &timeptr->tm_min, &timeptr->tm_sec);
1482
1483
1484 if (a == 6){
1485 timeptr->tm_isdst = -1;
1486 timeptr->tm_mon -= 1; // Adjust for unix zero-based months
1487 timeptr->tm_year -= 1900; // Adjust for year starting at 1900
1488 return TRUE; // worked.
1489 }
1490
1491 return FALSE; // Wasn't in Exif date format.
1492 }
1493
1494
1495 //--------------------------------------------------------------------------
1496 // Show the collected image info, displaying camera F-stop and shutter speed
1497 // in a consistent and legible fashion.
1498 //--------------------------------------------------------------------------
ShowImageInfo(int ShowFileInfo)1499 void ShowImageInfo(int ShowFileInfo)
1500 {
1501 if (ShowFileInfo){
1502 printf("File name : %s\n",ImageInfo.FileName);
1503 printf("File size : %d bytes\n",ImageInfo.FileSize);
1504
1505 {
1506 char Temp[20];
1507 FileTimeAsString(Temp);
1508 printf("File date : %s\n",Temp);
1509 }
1510 }
1511
1512 if (ImageInfo.CameraMake[0]){
1513 printf("Camera make : %s\n",ImageInfo.CameraMake);
1514 printf("Camera model : %s\n",ImageInfo.CameraModel);
1515 }
1516 if (ImageInfo.DateTime[0]){
1517 printf("Date/Time : %s\n",ImageInfo.DateTime);
1518 }
1519 printf("Resolution : %d x %d\n",ImageInfo.Width, ImageInfo.Height);
1520
1521 if (ImageInfo.Orientation > 1){
1522 // Only print orientation if one was supplied, and if its not 1 (normal orientation)
1523 printf("Orientation : %s\n", OrientTab[ImageInfo.Orientation]);
1524 }
1525
1526 if (ImageInfo.IsColor == 0){
1527 printf("Color/bw : Black and white\n");
1528 }
1529
1530 if (ImageInfo.FlashUsed >= 0){
1531 if (ImageInfo.FlashUsed & 1){
1532 printf("Flash used : Yes");
1533 switch (ImageInfo.FlashUsed){
1534 case 0x5: printf(" (Strobe light not detected)"); break;
1535 case 0x7: printf(" (Strobe light detected) "); break;
1536 case 0x9: printf(" (manual)"); break;
1537 case 0xd: printf(" (manual, return light not detected)"); break;
1538 case 0xf: printf(" (manual, return light detected)"); break;
1539 case 0x19:printf(" (auto)"); break;
1540 case 0x1d:printf(" (auto, return light not detected)"); break;
1541 case 0x1f:printf(" (auto, return light detected)"); break;
1542 case 0x41:printf(" (red eye reduction mode)"); break;
1543 case 0x45:printf(" (red eye reduction mode return light not detected)"); break;
1544 case 0x47:printf(" (red eye reduction mode return light detected)"); break;
1545 case 0x49:printf(" (manual, red eye reduction mode)"); break;
1546 case 0x4d:printf(" (manual, red eye reduction mode, return light not detected)"); break;
1547 case 0x4f:printf(" (red eye reduction mode, return light detected)"); break;
1548 case 0x59:printf(" (auto, red eye reduction mode)"); break;
1549 case 0x5d:printf(" (auto, red eye reduction mode, return light not detected)"); break;
1550 case 0x5f:printf(" (auto, red eye reduction mode, return light detected)"); break;
1551 }
1552 }else{
1553 printf("Flash used : No");
1554 switch (ImageInfo.FlashUsed){
1555 case 0x18:printf(" (auto)"); break;
1556 }
1557 }
1558 printf("\n");
1559 }
1560
1561
1562 if (ImageInfo.FocalLength){
1563 printf("Focal length : %4.1fmm",(double)ImageInfo.FocalLength);
1564 if (ImageInfo.FocalLength35mmEquiv){
1565 printf(" (35mm equivalent: %dmm)", ImageInfo.FocalLength35mmEquiv);
1566 }
1567 printf("\n");
1568 }
1569
1570 if (ImageInfo.DigitalZoomRatio > 1){
1571 // Digital zoom used. Shame on you!
1572 printf("Digital Zoom : %1.3fx\n", (double)ImageInfo.DigitalZoomRatio);
1573 }
1574
1575 if (ImageInfo.CCDWidth){
1576 printf("CCD width : %4.2fmm\n",(double)ImageInfo.CCDWidth);
1577 }
1578
1579 if (ImageInfo.ExposureTime){
1580 if (ImageInfo.ExposureTime < 0.010){
1581 printf("Exposure time: %6.4f s ",(double)ImageInfo.ExposureTime);
1582 }else{
1583 printf("Exposure time: %5.3f s ",(double)ImageInfo.ExposureTime);
1584 }
1585 if (ImageInfo.ExposureTime <= 0.5){
1586 printf(" (1/%d)",(int)(0.5 + 1/ImageInfo.ExposureTime));
1587 }
1588 printf("\n");
1589 }
1590 if (ImageInfo.ApertureFNumber){
1591 printf("Aperture : f/%3.1f\n",(double)ImageInfo.ApertureFNumber);
1592 }
1593 if (ImageInfo.Distance){
1594 if (ImageInfo.Distance < 0){
1595 printf("Focus dist. : Infinite\n");
1596 }else{
1597 printf("Focus dist. : %4.2fm\n",(double)ImageInfo.Distance);
1598 }
1599 }
1600
1601 if (ImageInfo.ISOequivalent){
1602 printf("ISO equiv. : %2d\n",(int)ImageInfo.ISOequivalent);
1603 }
1604
1605 if (ImageInfo.ExposureBias){
1606 // If exposure bias was specified, but set to zero, presumably its no bias at all,
1607 // so only show it if its nonzero.
1608 printf("Exposure bias: %4.2f\n",(double)ImageInfo.ExposureBias);
1609 }
1610
1611 switch(ImageInfo.Whitebalance) {
1612 case 1:
1613 printf("Whitebalance : Manual\n");
1614 break;
1615 case 0:
1616 printf("Whitebalance : Auto\n");
1617 break;
1618 }
1619
1620 //Quercus: 17-1-2004 Added LightSource, some cams return this, whitebalance or both
1621 switch(ImageInfo.LightSource) {
1622 case 1:
1623 printf("Light Source : Daylight\n");
1624 break;
1625 case 2:
1626 printf("Light Source : Fluorescent\n");
1627 break;
1628 case 3:
1629 printf("Light Source : Incandescent\n");
1630 break;
1631 case 4:
1632 printf("Light Source : Flash\n");
1633 break;
1634 case 9:
1635 printf("Light Source : Fine weather\n");
1636 break;
1637 case 11:
1638 printf("Light Source : Shade\n");
1639 break;
1640 default:; //Quercus: 17-1-2004 There are many more modes for this, check Exif2.2 specs
1641 // If it just says 'unknown' or we don't know it, then
1642 // don't bother showing it - it doesn't add any useful information.
1643 }
1644
1645 if (ImageInfo.MeteringMode){ // 05-jan-2001 vcs
1646 switch(ImageInfo.MeteringMode) {
1647 case 2:
1648 printf("Metering Mode: center weight\n");
1649 break;
1650 case 3:
1651 printf("Metering Mode: spot\n");
1652 break;
1653 case 5:
1654 printf("Metering Mode: matrix\n");
1655 break;
1656 }
1657 }
1658
1659 if (ImageInfo.ExposureProgram){ // 05-jan-2001 vcs
1660 switch(ImageInfo.ExposureProgram) {
1661 case 1:
1662 printf("Exposure : Manual\n");
1663 break;
1664 case 2:
1665 printf("Exposure : program (auto)\n");
1666 break;
1667 case 3:
1668 printf("Exposure : aperture priority (semi-auto)\n");
1669 break;
1670 case 4:
1671 printf("Exposure : shutter priority (semi-auto)\n");
1672 break;
1673 case 5:
1674 printf("Exposure : Creative Program (based towards depth of field)\n");
1675 break;
1676 case 6:
1677 printf("Exposure : Action program (based towards fast shutter speed)\n");
1678 break;
1679 case 7:
1680 printf("Exposure : Portrait Mode\n");
1681 break;
1682 case 8:
1683 printf("Exposure : LandscapeMode \n");
1684 break;
1685 default:
1686 break;
1687 }
1688 }
1689 switch(ImageInfo.ExposureMode){
1690 case 0: // Automatic (not worth cluttering up output for)
1691 break;
1692 case 1: printf("Exposure Mode: Manual\n");
1693 break;
1694 case 2: printf("Exposure Mode: Auto bracketing\n");
1695 break;
1696 }
1697
1698 if (ImageInfo.DistanceRange) {
1699 printf("Focus range : ");
1700 switch(ImageInfo.DistanceRange) {
1701 case 1:
1702 printf("macro");
1703 break;
1704 case 2:
1705 printf("close");
1706 break;
1707 case 3:
1708 printf("distant");
1709 break;
1710 }
1711 printf("\n");
1712 }
1713
1714
1715
1716 if (ImageInfo.Process != M_SOF0){
1717 // don't show it if its the plain old boring 'baseline' process, but do
1718 // show it if its something else, like 'progressive' (used on web sometimes)
1719 int a;
1720 for (a=0;;a++){
1721 if (a >= (int)PROCESS_TABLE_SIZE){
1722 // ran off the end of the table.
1723 printf("Jpeg process : Unknown\n");
1724 break;
1725 }
1726 if (ProcessTable[a].Tag == ImageInfo.Process){
1727 printf("Jpeg process : %s\n",ProcessTable[a].Desc);
1728 break;
1729 }
1730 }
1731 }
1732
1733 if (ImageInfo.GpsInfoPresent){
1734 printf("GPS Latitude : %s\n",ImageInfo.GpsLat);
1735 printf("GPS Longitude: %s\n",ImageInfo.GpsLong);
1736 if (ImageInfo.GpsAlt[0]) printf("GPS Altitude : %s\n",ImageInfo.GpsAlt);
1737 }
1738
1739 // Print the comment. Print 'Comment:' for each new line of comment.
1740 if (ImageInfo.Comments[0]){
1741 int a,c;
1742 printf("Comment : ");
1743 if (!ImageInfo.CommentWidchars){
1744 for (a=0;a<MAX_COMMENT_SIZE;a++){
1745 c = ImageInfo.Comments[a];
1746 if (c == '\0') break;
1747 if (c == '\n'){
1748 // Do not start a new line if the string ends with a carriage return.
1749 if (ImageInfo.Comments[a+1] != '\0'){
1750 printf("\nComment : ");
1751 }else{
1752 printf("\n");
1753 }
1754 }else{
1755 putchar(c);
1756 }
1757 }
1758 printf("\n");
1759 }else{
1760 printf("%.*ls\n", ImageInfo.CommentWidchars, (wchar_t *)ImageInfo.Comments);
1761 }
1762 }
1763 if (ImageInfo.ThumbnailOffset){
1764 printf("Map: %05d-%05d: Thumbnail\n",ImageInfo.ThumbnailOffset, ImageInfo.ThumbnailOffset+ImageInfo.ThumbnailSize);
1765 } else {
1766 printf("NO thumbnail");
1767 }
1768 }
1769
1770
1771 //--------------------------------------------------------------------------
1772 // Summarize highlights of image info on one line (suitable for grep-ing)
1773 //--------------------------------------------------------------------------
ShowConciseImageInfo(void)1774 void ShowConciseImageInfo(void)
1775 {
1776 printf("\"%s\"",ImageInfo.FileName);
1777
1778 printf(" %dx%d",ImageInfo.Width, ImageInfo.Height);
1779
1780 if (ImageInfo.ExposureTime){
1781 if (ImageInfo.ExposureTime <= 0.5){
1782 printf(" (1/%d)",(int)(0.5 + 1/ImageInfo.ExposureTime));
1783 }else{
1784 printf(" (%1.1f)",ImageInfo.ExposureTime);
1785 }
1786 }
1787
1788 if (ImageInfo.ApertureFNumber){
1789 printf(" f/%3.1f",(double)ImageInfo.ApertureFNumber);
1790 }
1791
1792 if (ImageInfo.FocalLength35mmEquiv){
1793 printf(" f(35)=%dmm",ImageInfo.FocalLength35mmEquiv);
1794 }
1795
1796 if (ImageInfo.FlashUsed >= 0 && ImageInfo.FlashUsed & 1){
1797 printf(" (flash)");
1798 }
1799
1800 if (ImageInfo.IsColor == 0){
1801 printf(" (bw)");
1802 }
1803
1804 printf("\n");
1805 }
1806