00001
00002
00003
00004
00005
00006
00007
00008
00009
00010
00011
00012
00013
00014
00015
00016
00017
00018
00019
00020
00021 #include <config.h>
00022
00023 #include <libexif/exif-mnote-data.h>
00024 #include <libexif/exif-data.h>
00025 #include <libexif/exif-ifd.h>
00026 #include <libexif/exif-mnote-data-priv.h>
00027 #include <libexif/exif-utils.h>
00028 #include <libexif/exif-loader.h>
00029 #include <libexif/exif-log.h>
00030 #include <libexif/i18n.h>
00031
00032 #include <libexif/olympus/exif-mnote-data-olympus.h>
00033 #include <libexif/canon/exif-mnote-data-canon.h>
00034 #include <libexif/pentax/exif-mnote-data-pentax.h>
00035
00036 #include <stdlib.h>
00037 #include <stdio.h>
00038 #include <string.h>
00039
00040 #undef MAX
00041 #define MAX(a, b) (((a) > (b)) ? (a) : (b))
00042
00043 #if defined(__WATCOMC__) || defined(_MSC_VER)
00044 # define strncasecmp strnicmp
00045 #endif
00046
00047 #undef JPEG_MARKER_SOI
00048 #define JPEG_MARKER_SOI 0xd8
00049 #undef JPEG_MARKER_APP0
00050 #define JPEG_MARKER_APP0 0xe0
00051 #undef JPEG_MARKER_APP1
00052 #define JPEG_MARKER_APP1 0xe1
00053
00054 static const unsigned char ExifHeader[] = {0x45, 0x78, 0x69, 0x66, 0x00, 0x00};
00055
00056 struct _ExifDataPrivate
00057 {
00058 ExifByteOrder order;
00059
00060 ExifMnoteData *md;
00061
00062 ExifLog *log;
00063 ExifMem *mem;
00064
00065 unsigned int ref_count;
00066
00067
00068 unsigned int offset_mnote;
00069
00070 ExifDataOption options;
00071 ExifDataType data_type;
00072 };
00073
00074 static void *
00075 exif_data_alloc (ExifData *data, unsigned int i)
00076 {
00077 void *d;
00078
00079 if (!data || !i)
00080 return NULL;
00081
00082 d = exif_mem_alloc (data->priv->mem, i);
00083 if (d)
00084 return d;
00085
00086 EXIF_LOG_NO_MEMORY (data->priv->log, "ExifData", i);
00087 return NULL;
00088 }
00089
00090 ExifMnoteData *
00091 exif_data_get_mnote_data (ExifData *d)
00092 {
00093 return (d && d->priv) ? d->priv->md : NULL;
00094 }
00095
00096 ExifData *
00097 exif_data_new (void)
00098 {
00099 ExifMem *mem = exif_mem_new_default ();
00100 ExifData *d = exif_data_new_mem (mem);
00101
00102 exif_mem_unref (mem);
00103
00104 return d;
00105 }
00106
00107 ExifData *
00108 exif_data_new_mem (ExifMem *mem)
00109 {
00110 ExifData *data;
00111 unsigned int i;
00112
00113 if (!mem)
00114 return NULL;
00115
00116 data = exif_mem_alloc (mem, sizeof (ExifData));
00117 if (!data)
00118 return (NULL);
00119 data->priv = exif_mem_alloc (mem, sizeof (ExifDataPrivate));
00120 if (!data->priv) {
00121 exif_mem_free (mem, data);
00122 return (NULL);
00123 }
00124 data->priv->ref_count = 1;
00125
00126 data->priv->mem = mem;
00127 exif_mem_ref (mem);
00128
00129 for (i = 0; i < EXIF_IFD_COUNT; i++) {
00130 data->ifd[i] = exif_content_new_mem (data->priv->mem);
00131 if (!data->ifd[i]) {
00132 exif_data_free (data);
00133 return (NULL);
00134 }
00135 data->ifd[i]->parent = data;
00136 }
00137
00138
00139 exif_data_set_option (data, EXIF_DATA_OPTION_IGNORE_UNKNOWN_TAGS);
00140 exif_data_set_option (data, EXIF_DATA_OPTION_FOLLOW_SPECIFICATION);
00141
00142
00143 exif_data_set_data_type (data, EXIF_DATA_TYPE_COUNT);
00144
00145 return (data);
00146 }
00147
00148 ExifData *
00149 exif_data_new_from_data (const unsigned char *data, unsigned int size)
00150 {
00151 ExifData *edata;
00152
00153 edata = exif_data_new ();
00154 exif_data_load_data (edata, data, size);
00155 return (edata);
00156 }
00157
00158 static int
00159 exif_data_load_data_entry (ExifData *data, ExifEntry *entry,
00160 const unsigned char *d,
00161 unsigned int size, unsigned int offset)
00162 {
00163 unsigned int s, doff;
00164
00165 entry->tag = exif_get_short (d + offset + 0, data->priv->order);
00166 entry->format = exif_get_short (d + offset + 2, data->priv->order);
00167 entry->components = exif_get_long (d + offset + 4, data->priv->order);
00168
00169 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
00170 "Loading entry 0x%x ('%s')...", entry->tag,
00171 exif_tag_get_name (entry->tag));
00172
00173
00174
00175
00176
00177 s = exif_format_get_size (entry->format) * entry->components;
00178 if (!s)
00179 return 0;
00180 if (s > 4)
00181 doff = exif_get_long (d + offset + 8, data->priv->order);
00182 else
00183 doff = offset + 8;
00184
00185
00186 if (size < doff + s)
00187 return 0;
00188
00189 entry->data = exif_data_alloc (data, s);
00190 if (entry->data) {
00191 entry->size = s;
00192 memcpy (entry->data, d + doff, s);
00193 }
00194
00195
00196 if (entry->tag == EXIF_TAG_MAKER_NOTE) {
00197 if (entry->size > 6) exif_log (data->priv->log,
00198 EXIF_LOG_CODE_DEBUG, "ExifData",
00199 "MakerNote found (%02x %02x %02x %02x "
00200 "%02x %02x %02x...).",
00201 entry->data[0], entry->data[1], entry->data[2],
00202 entry->data[3], entry->data[4], entry->data[5],
00203 entry->data[6]);
00204 data->priv->offset_mnote = doff;
00205 }
00206 return 1;
00207 }
00208
00209 static void
00210 exif_data_save_data_entry (ExifData *data, ExifEntry *e,
00211 unsigned char **d, unsigned int *ds,
00212 unsigned int offset)
00213 {
00214 unsigned int doff, s;
00215
00216 if (!data || !data->priv)
00217 return;
00218
00219
00220
00221
00222
00223 exif_set_short (*d + 6 + offset + 0,
00224 data->priv->order, (ExifShort) e->tag);
00225 exif_set_short (*d + 6 + offset + 2,
00226 data->priv->order, (ExifShort) e->format);
00227
00228 #ifndef EXIF_DONT_CHANGE_MAKER_NOTE
00229
00230 if ((e->tag == EXIF_TAG_MAKER_NOTE) && data->priv->md) {
00231 exif_mem_free (data->priv->mem, e->data);
00232 e->data = NULL;
00233 e->size = 0;
00234 exif_mnote_data_set_offset (data->priv->md, *ds - 6);
00235 exif_mnote_data_save (data->priv->md, &e->data, &e->size);
00236 e->components = e->size;
00237 }
00238 #endif
00239
00240 exif_set_long (*d + 6 + offset + 4,
00241 data->priv->order, e->components);
00242
00243
00244
00245
00246
00247 s = exif_format_get_size (e->format) * e->components;
00248 if (s > 4) {
00249 doff = *ds - 6;
00250 *ds += s;
00251
00252
00253
00254
00255
00256
00257 if (s & 1)
00258 (*ds)++;
00259 *d = exif_mem_realloc (data->priv->mem, *d, *ds);
00260 if (!*d) {
00261 EXIF_LOG_NO_MEMORY (data->priv->log, "ExifData", *ds);
00262 return;
00263 }
00264 exif_set_long (*d + 6 + offset + 8, data->priv->order, doff);
00265 if (s & 1)
00266 *(*d + *ds - 1) = '\0';
00267
00268 } else
00269 doff = offset + 8;
00270
00271
00272 memcpy (*d + 6 + doff, e->data, s);
00273 if (s < 4)
00274 memset (*d + 6 + doff + s, 0, (4 - s));
00275 }
00276
00277 static void
00278 exif_data_load_data_thumbnail (ExifData *data, const unsigned char *d,
00279 unsigned int ds, ExifLong offset, ExifLong size)
00280 {
00281 if (ds < offset + size) {
00282 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
00283 "Bogus thumbnail offset and size: %i < %i + %i.",
00284 (int) ds, (int) offset, (int) size);
00285 return;
00286 }
00287 if (data->data)
00288 exif_mem_free (data->priv->mem, data->data);
00289 data->size = size;
00290 data->data = exif_data_alloc (data, data->size);
00291 if (!data->data)
00292 return;
00293 memcpy (data->data, d + offset, data->size);
00294 }
00295
00296 #undef CHECK_REC
00297 #define CHECK_REC(i) \
00298 if ((i) == ifd) { \
00299 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, \
00300 "ExifData", "Recursive entry in IFD " \
00301 "'%s' detected. Skipping...", \
00302 exif_ifd_get_name (i)); \
00303 break; \
00304 } \
00305 if (data->ifd[(i)]->count) { \
00306 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, \
00307 "ExifData", "Attemt to load IFD " \
00308 "'%s' multiple times detected. " \
00309 "Skipping...", \
00310 exif_ifd_get_name (i)); \
00311 break; \
00312 }
00313
00314 static void
00315 exif_data_load_data_content (ExifData *data, ExifIfd ifd,
00316 const unsigned char *d,
00317 unsigned int ds, unsigned int offset, unsigned int recursion_depth)
00318 {
00319 ExifLong o, thumbnail_offset = 0, thumbnail_length = 0;
00320 ExifShort n;
00321 ExifEntry *entry;
00322 unsigned int i;
00323 ExifTag tag;
00324
00325 if (!data || !data->priv)
00326 return;
00327 if ((ifd < 0) || (ifd >= EXIF_IFD_COUNT))
00328 return;
00329
00330 if (recursion_depth > 150) {
00331 exif_log (data->priv->log, EXIF_LOG_CODE_CORRUPT_DATA, "ExifData",
00332 "Deep recursion detected!");
00333 return;
00334 }
00335
00336
00337 if (offset >= ds - 1)
00338 return;
00339 n = exif_get_short (d + offset, data->priv->order);
00340 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
00341 "Loading %i entries...", n);
00342 offset += 2;
00343
00344
00345 if (offset + 12 * n > ds)
00346 n = (ds - offset) / 12;
00347
00348 for (i = 0; i < n; i++) {
00349
00350 tag = exif_get_short (d + offset + 12 * i, data->priv->order);
00351 switch (tag) {
00352 case EXIF_TAG_EXIF_IFD_POINTER:
00353 case EXIF_TAG_GPS_INFO_IFD_POINTER:
00354 case EXIF_TAG_INTEROPERABILITY_IFD_POINTER:
00355 case EXIF_TAG_JPEG_INTERCHANGE_FORMAT_LENGTH:
00356 case EXIF_TAG_JPEG_INTERCHANGE_FORMAT:
00357 o = exif_get_long (d + offset + 12 * i + 8,
00358 data->priv->order);
00359 switch (tag) {
00360 case EXIF_TAG_EXIF_IFD_POINTER:
00361 CHECK_REC (EXIF_IFD_EXIF);
00362 exif_data_load_data_content (data, EXIF_IFD_EXIF, d, ds, o, recursion_depth + 1);
00363 break;
00364 case EXIF_TAG_GPS_INFO_IFD_POINTER:
00365 CHECK_REC (EXIF_IFD_GPS);
00366 exif_data_load_data_content (data, EXIF_IFD_GPS, d, ds, o, recursion_depth + 1);
00367 break;
00368 case EXIF_TAG_INTEROPERABILITY_IFD_POINTER:
00369 CHECK_REC (EXIF_IFD_INTEROPERABILITY);
00370 exif_data_load_data_content (data, EXIF_IFD_INTEROPERABILITY, d, ds, o, recursion_depth + 1);
00371 break;
00372 case EXIF_TAG_JPEG_INTERCHANGE_FORMAT:
00373 thumbnail_offset = o;
00374 if (thumbnail_offset && thumbnail_length)
00375 exif_data_load_data_thumbnail (data, d,
00376 ds, thumbnail_offset,
00377 thumbnail_length);
00378 break;
00379 case EXIF_TAG_JPEG_INTERCHANGE_FORMAT_LENGTH:
00380 thumbnail_length = o;
00381 if (thumbnail_offset && thumbnail_length)
00382 exif_data_load_data_thumbnail (data, d,
00383 ds, thumbnail_offset,
00384 thumbnail_length);
00385 break;
00386 default:
00387 return;
00388 }
00389 break;
00390 default:
00391
00392
00393
00394
00395
00396
00397 if (!exif_tag_get_name_in_ifd (tag, ifd)) {
00398
00399
00400
00401
00402
00403 if (!memcmp (d + offset + 12 * i, "\0\0\0\0", 4)) {
00404 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
00405 "Skipping empty entry at position %i in '%s'.", i,
00406 exif_ifd_get_name (ifd));
00407 break;
00408 }
00409 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
00410 "Unknown tag 0x%04x (entry %i in '%s'). Please report this tag "
00411 "to <libexif-devel@lists.sourceforge.net>.", tag, i,
00412 exif_ifd_get_name (ifd));
00413 if (data->priv->options & EXIF_DATA_OPTION_IGNORE_UNKNOWN_TAGS)
00414 break;
00415 }
00416 entry = exif_entry_new_mem (data->priv->mem);
00417 if (exif_data_load_data_entry (data, entry, d, ds,
00418 offset + 12 * i))
00419 exif_content_add_entry (data->ifd[ifd], entry);
00420 exif_entry_unref (entry);
00421 break;
00422 }
00423 }
00424 }
00425
00426 static int
00427 cmp_func (const unsigned char *p1, const unsigned char *p2, ExifByteOrder o)
00428 {
00429 ExifShort tag1 = exif_get_short (p1, o);
00430 ExifShort tag2 = exif_get_short (p2, o);
00431
00432 return (tag1 < tag2) ? -1 : (tag1 > tag2) ? 1 : 0;
00433 }
00434
00435 static int
00436 cmp_func_intel (const void *elem1, const void *elem2)
00437 {
00438 return cmp_func ((const unsigned char *) elem1,
00439 (const unsigned char *) elem2, EXIF_BYTE_ORDER_INTEL);
00440 }
00441
00442 static int
00443 cmp_func_motorola (const void *elem1, const void *elem2)
00444 {
00445 return cmp_func ((const unsigned char *) elem1,
00446 (const unsigned char *) elem2, EXIF_BYTE_ORDER_MOTOROLA);
00447 }
00448
00449 static void
00450 exif_data_save_data_content (ExifData *data, ExifContent *ifd,
00451 unsigned char **d, unsigned int *ds,
00452 unsigned int offset)
00453 {
00454 unsigned int j, n_ptr = 0, n_thumb = 0;
00455 ExifIfd i;
00456
00457 if (!data || !data->priv || !ifd || !d || !ds)
00458 return;
00459
00460 for (i = 0; i < EXIF_IFD_COUNT; i++)
00461 if (ifd == data->ifd[i])
00462 break;
00463 if (i == EXIF_IFD_COUNT)
00464 return;
00465
00466
00467
00468
00469 switch (i) {
00470 case EXIF_IFD_0:
00471
00472
00473
00474
00475
00476 if (data->ifd[EXIF_IFD_EXIF]->count ||
00477 data->ifd[EXIF_IFD_INTEROPERABILITY]->count)
00478 n_ptr++;
00479
00480
00481 if (data->ifd[EXIF_IFD_GPS]->count)
00482 n_ptr++;
00483
00484 break;
00485 case EXIF_IFD_1:
00486 if (data->size)
00487 n_thumb = 2;
00488 break;
00489 case EXIF_IFD_EXIF:
00490 if (data->ifd[EXIF_IFD_INTEROPERABILITY]->count)
00491 n_ptr++;
00492 default:
00493 break;
00494 }
00495
00496
00497
00498
00499
00500 *ds += (2 + (ifd->count + n_ptr + n_thumb) * 12 + 4);
00501 *d = exif_mem_realloc (data->priv->mem, *d, *ds);
00502 if (!*d) {
00503 EXIF_LOG_NO_MEMORY (data->priv->log, "ExifData", *ds);
00504 return;
00505 }
00506
00507
00508 exif_set_short (*d + 6 + offset, data->priv->order,
00509 (ExifShort) (ifd->count + n_ptr + n_thumb));
00510 offset += 2;
00511
00512
00513 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
00514 "Saving %i entries (IFD '%s', offset: %i)...",
00515 ifd->count, exif_ifd_get_name (i), offset);
00516 for (j = 0; j < ifd->count; j++)
00517 exif_data_save_data_entry (data, ifd->entries[j], d, ds, offset + 12 * j);
00518
00519 offset += 12 * ifd->count;
00520
00521
00522 switch (i) {
00523 case EXIF_IFD_0:
00524
00525
00526
00527
00528
00529
00530
00531 if (data->ifd[EXIF_IFD_EXIF]->count ||
00532 data->ifd[EXIF_IFD_INTEROPERABILITY]->count) {
00533 exif_set_short (*d + 6 + offset + 0, data->priv->order,
00534 EXIF_TAG_EXIF_IFD_POINTER);
00535 exif_set_short (*d + 6 + offset + 2, data->priv->order,
00536 EXIF_FORMAT_LONG);
00537 exif_set_long (*d + 6 + offset + 4, data->priv->order,
00538 1);
00539 exif_set_long (*d + 6 + offset + 8, data->priv->order,
00540 *ds - 6);
00541 exif_data_save_data_content (data,
00542 data->ifd[EXIF_IFD_EXIF], d, ds, *ds - 6);
00543 offset += 12;
00544 }
00545
00546
00547 if (data->ifd[EXIF_IFD_GPS]->count) {
00548 exif_set_short (*d + 6 + offset + 0, data->priv->order,
00549 EXIF_TAG_GPS_INFO_IFD_POINTER);
00550 exif_set_short (*d + 6 + offset + 2, data->priv->order,
00551 EXIF_FORMAT_LONG);
00552 exif_set_long (*d + 6 + offset + 4, data->priv->order,
00553 1);
00554 exif_set_long (*d + 6 + offset + 8, data->priv->order,
00555 *ds - 6);
00556 exif_data_save_data_content (data,
00557 data->ifd[EXIF_IFD_GPS], d, ds, *ds - 6);
00558 offset += 12;
00559 }
00560
00561 break;
00562 case EXIF_IFD_EXIF:
00563
00564
00565
00566
00567
00568 if (data->ifd[EXIF_IFD_INTEROPERABILITY]->count) {
00569 exif_set_short (*d + 6 + offset + 0, data->priv->order,
00570 EXIF_TAG_INTEROPERABILITY_IFD_POINTER);
00571 exif_set_short (*d + 6 + offset + 2, data->priv->order,
00572 EXIF_FORMAT_LONG);
00573 exif_set_long (*d + 6 + offset + 4, data->priv->order,
00574 1);
00575 exif_set_long (*d + 6 + offset + 8, data->priv->order,
00576 *ds - 6);
00577 exif_data_save_data_content (data,
00578 data->ifd[EXIF_IFD_INTEROPERABILITY], d, ds,
00579 *ds - 6);
00580 offset += 12;
00581 }
00582
00583 break;
00584 case EXIF_IFD_1:
00585
00586
00587
00588
00589
00590 if (data->size) {
00591
00592
00593 exif_set_short (*d + 6 + offset + 0, data->priv->order,
00594 EXIF_TAG_JPEG_INTERCHANGE_FORMAT);
00595 exif_set_short (*d + 6 + offset + 2, data->priv->order,
00596 EXIF_FORMAT_LONG);
00597 exif_set_long (*d + 6 + offset + 4, data->priv->order,
00598 1);
00599 exif_set_long (*d + 6 + offset + 8, data->priv->order,
00600 *ds - 6);
00601 *ds += data->size;
00602 *d = exif_mem_realloc (data->priv->mem, *d, *ds);
00603 if (!*d) {
00604 EXIF_LOG_NO_MEMORY (data->priv->log, "ExifData",
00605 *ds);
00606 return;
00607 }
00608 memcpy (*d + *ds - data->size, data->data, data->size);
00609 offset += 12;
00610
00611
00612 exif_set_short (*d + 6 + offset + 0, data->priv->order,
00613 EXIF_TAG_JPEG_INTERCHANGE_FORMAT_LENGTH);
00614 exif_set_short (*d + 6 + offset + 2, data->priv->order,
00615 EXIF_FORMAT_LONG);
00616 exif_set_long (*d + 6 + offset + 4, data->priv->order,
00617 1);
00618 exif_set_long (*d + 6 + offset + 8, data->priv->order,
00619 data->size);
00620 offset += 12;
00621 }
00622
00623 break;
00624 default:
00625 break;
00626 }
00627
00628
00629 qsort (*d + 6 + offset - (ifd->count + n_ptr + n_thumb) * 12,
00630 (ifd->count + n_ptr + n_thumb), 12,
00631 (data->priv->order == EXIF_BYTE_ORDER_INTEL) ? cmp_func_intel : cmp_func_motorola);
00632
00633
00634 if (i == EXIF_IFD_0 && (data->ifd[EXIF_IFD_1]->count ||
00635 data->size)) {
00636
00637
00638
00639
00640
00641 exif_set_long (*d + 6 + offset, data->priv->order, *ds - 6);
00642 exif_data_save_data_content (data, data->ifd[EXIF_IFD_1], d, ds,
00643 *ds - 6);
00644 } else
00645 exif_set_long (*d + 6 + offset, data->priv->order, 0);
00646 }
00647
00648 typedef enum {
00649 EXIF_DATA_TYPE_MAKER_NOTE_NONE = 0,
00650 EXIF_DATA_TYPE_MAKER_NOTE_CANON = 1,
00651 EXIF_DATA_TYPE_MAKER_NOTE_OLYMPUS = 2,
00652 EXIF_DATA_TYPE_MAKER_NOTE_PENTAX = 3
00653 } ExifDataTypeMakerNote;
00654
00655 static ExifDataTypeMakerNote
00656 exif_data_get_type_maker_note (ExifData *d)
00657 {
00658 ExifEntry *e, *em;
00659 char value[1024];
00660
00661 if (!d)
00662 return EXIF_DATA_TYPE_MAKER_NOTE_NONE;
00663
00664 e = exif_data_get_entry (d, EXIF_TAG_MAKER_NOTE);
00665 if (!e)
00666 return EXIF_DATA_TYPE_MAKER_NOTE_NONE;
00667
00668
00669 if ((e->size >= 5) && (!memcmp (e->data, "OLYMP", 5) ||
00670 !memcmp (e->data, "Nikon", 5)))
00671 return EXIF_DATA_TYPE_MAKER_NOTE_OLYMPUS;
00672
00673 em = exif_data_get_entry (d, EXIF_TAG_MAKE);
00674 if (!em)
00675 return EXIF_DATA_TYPE_MAKER_NOTE_NONE;
00676
00677
00678 if (!strcmp (exif_entry_get_value (em, value, sizeof (value)), "Canon"))
00679 return EXIF_DATA_TYPE_MAKER_NOTE_CANON;
00680
00681
00682 if ((e->size >= 2) && (e->data[0] == 0x00) && (e->data[1] == 0x1b)) {
00683 if (!strncasecmp (
00684 exif_entry_get_value (em, value, sizeof(value)),
00685 "Nikon", 5))
00686 return EXIF_DATA_TYPE_MAKER_NOTE_OLYMPUS;
00687 else
00688 return EXIF_DATA_TYPE_MAKER_NOTE_PENTAX;
00689 }
00690
00691 return EXIF_DATA_TYPE_MAKER_NOTE_NONE;
00692 }
00693
00694 #define LOG_TOO_SMALL \
00695 exif_log (data->priv->log, EXIF_LOG_CODE_CORRUPT_DATA, "ExifData", \
00696 _("Size of data too small to allow for EXIF data."));
00697
00698 void
00699 exif_data_load_data (ExifData *data, const unsigned char *d_orig,
00700 unsigned int ds_orig)
00701 {
00702 unsigned int l;
00703 ExifLong offset;
00704 ExifShort n;
00705 const unsigned char *d = d_orig;
00706 unsigned int ds = ds_orig, len;
00707
00708 if (!data || !data->priv || !d || !ds)
00709 return;
00710
00711 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
00712 "Parsing %i byte(s) EXIF data...\n", ds);
00713
00714
00715
00716
00717
00718 if (ds < 6) {
00719 LOG_TOO_SMALL;
00720 return;
00721 }
00722 if (!memcmp (d, ExifHeader, 6)) {
00723 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
00724 "Found EXIF header.");
00725 } else {
00726 while (1) {
00727 while ((d[0] == 0xff) && ds) {
00728 d++;
00729 ds--;
00730 }
00731
00732
00733 if (d[0] == JPEG_MARKER_SOI) {
00734 d++;
00735 ds--;
00736 continue;
00737 }
00738
00739
00740 if (d[0] == JPEG_MARKER_APP0) {
00741 d++;
00742 ds--;
00743 l = (d[0] << 8) | d[1];
00744 if (l > ds)
00745 return;
00746 d += l;
00747 ds -= l;
00748 continue;
00749 }
00750
00751
00752 if (d[0] == JPEG_MARKER_APP1)
00753 break;
00754
00755
00756 exif_log (data->priv->log, EXIF_LOG_CODE_CORRUPT_DATA,
00757 "ExifData", _("EXIF marker not found."));
00758 return;
00759 }
00760 d++;
00761 ds--;
00762 if (ds < 2) {
00763 LOG_TOO_SMALL;
00764 return;
00765 }
00766 len = (d[0] << 8) | d[1];
00767 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
00768 "We have to deal with %i byte(s) of EXIF data.",
00769 len);
00770 d += 2;
00771 ds -= 2;
00772 }
00773
00774
00775
00776
00777
00778 if (ds < 6) {
00779 LOG_TOO_SMALL;
00780 return;
00781 }
00782 if (memcmp (d, ExifHeader, 6)) {
00783 exif_log (data->priv->log, EXIF_LOG_CODE_CORRUPT_DATA,
00784 "ExifData", _("EXIF header not found."));
00785 return;
00786 }
00787
00788 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
00789 "Found EXIF header.");
00790
00791
00792 if (ds < 14)
00793 return;
00794 if (!memcmp (d + 6, "II", 2))
00795 data->priv->order = EXIF_BYTE_ORDER_INTEL;
00796 else if (!memcmp (d + 6, "MM", 2))
00797 data->priv->order = EXIF_BYTE_ORDER_MOTOROLA;
00798 else {
00799 exif_log (data->priv->log, EXIF_LOG_CODE_CORRUPT_DATA,
00800 "ExifData", _("Unknown encoding."));
00801 return;
00802 }
00803
00804
00805 if (exif_get_short (d + 8, data->priv->order) != 0x002a)
00806 return;
00807
00808
00809 offset = exif_get_long (d + 10, data->priv->order);
00810 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
00811 "IFD 0 at %i.", (int) offset);
00812
00813
00814 exif_data_load_data_content (data, EXIF_IFD_0, d + 6, ds - 6, offset, 0);
00815
00816
00817 if (offset + 6 + 2 > ds) {
00818 return;
00819 }
00820 n = exif_get_short (d + 6 + offset, data->priv->order);
00821 if (offset + 6 + 2 + 12 * n + 4 > ds) {
00822 return;
00823 }
00824 offset = exif_get_long (d + 6 + offset + 2 + 12 * n, data->priv->order);
00825 if (offset) {
00826 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
00827 "IFD 1 at %i.", (int) offset);
00828
00829
00830 if (offset > ds - 6) {
00831 exif_log (data->priv->log, EXIF_LOG_CODE_CORRUPT_DATA,
00832 "ExifData", "Bogus offset.");
00833 return;
00834 }
00835
00836 exif_data_load_data_content (data, EXIF_IFD_1, d + 6, ds - 6, offset, 0);
00837 }
00838
00839
00840
00841
00842
00843
00844
00845 switch (exif_data_get_type_maker_note (data)) {
00846 case EXIF_DATA_TYPE_MAKER_NOTE_OLYMPUS:
00847 data->priv->md = exif_mnote_data_olympus_new (data->priv->mem);
00848 break;
00849 case EXIF_DATA_TYPE_MAKER_NOTE_PENTAX:
00850 data->priv->md = exif_mnote_data_pentax_new (data->priv->mem);
00851 break;
00852 case EXIF_DATA_TYPE_MAKER_NOTE_CANON:
00853 data->priv->md = exif_mnote_data_canon_new (data->priv->mem);
00854 break;
00855 default:
00856 break;
00857 }
00858
00859
00860
00861
00862 if (data->priv->md) {
00863 exif_mnote_data_log (data->priv->md, data->priv->log);
00864 exif_mnote_data_set_byte_order (data->priv->md,
00865 data->priv->order);
00866 exif_mnote_data_set_offset (data->priv->md,
00867 data->priv->offset_mnote);
00868 exif_mnote_data_load (data->priv->md, d, ds);
00869 }
00870
00871 if (data->priv->options & EXIF_DATA_OPTION_FOLLOW_SPECIFICATION)
00872 exif_data_fix (data);
00873 }
00874
00875 void
00876 exif_data_save_data (ExifData *data, unsigned char **d, unsigned int *ds)
00877 {
00878 if (!data || !d || !ds)
00879 return;
00880
00881
00882 *ds = 14;
00883 *d = exif_data_alloc (data, *ds);
00884 if (!*d)
00885 return;
00886 memcpy (*d, ExifHeader, 6);
00887
00888
00889 if (data->priv->order == EXIF_BYTE_ORDER_INTEL) {
00890 memcpy (*d + 6, "II", 2);
00891 } else {
00892 memcpy (*d + 6, "MM", 2);
00893 }
00894
00895
00896 exif_set_short (*d + 8, data->priv->order, 0x002a);
00897
00898
00899
00900
00901
00902
00903
00904 exif_set_long (*d + 10, data->priv->order, 8);
00905
00906
00907 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
00908 "Saving IFDs...");
00909 exif_data_save_data_content (data, data->ifd[EXIF_IFD_0], d, ds,
00910 *ds - 6);
00911 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
00912 "Saved %i byte(s) EXIF data.", *ds);
00913 }
00914
00915 ExifData *
00916 exif_data_new_from_file (const char *path)
00917 {
00918 ExifData *edata;
00919 ExifLoader *loader;
00920
00921 loader = exif_loader_new ();
00922 exif_loader_write_file (loader, path);
00923 edata = exif_loader_get_data (loader);
00924 exif_loader_unref (loader);
00925
00926 return (edata);
00927 }
00928
00929 void
00930 exif_data_ref (ExifData *data)
00931 {
00932 if (!data)
00933 return;
00934
00935 data->priv->ref_count++;
00936 }
00937
00938 void
00939 exif_data_unref (ExifData *data)
00940 {
00941 if (!data)
00942 return;
00943
00944 data->priv->ref_count--;
00945 if (!data->priv->ref_count)
00946 exif_data_free (data);
00947 }
00948
00949 void
00950 exif_data_free (ExifData *data)
00951 {
00952 unsigned int i;
00953 ExifMem *mem = (data && data->priv) ? data->priv->mem : NULL;
00954
00955 if (!data)
00956 return;
00957
00958 for (i = 0; i < EXIF_IFD_COUNT; i++) {
00959 if (data->ifd[i]) {
00960 exif_content_unref (data->ifd[i]);
00961 data->ifd[i] = NULL;
00962 }
00963 }
00964
00965 if (data->data) {
00966 exif_mem_free (mem, data->data);
00967 data->data = NULL;
00968 }
00969
00970 if (data->priv) {
00971 if (data->priv->log) {
00972 exif_log_unref (data->priv->log);
00973 data->priv->log = NULL;
00974 }
00975 if (data->priv->md) {
00976 exif_mnote_data_unref (data->priv->md);
00977 data->priv->md = NULL;
00978 }
00979 exif_mem_free (mem, data->priv);
00980 exif_mem_free (mem, data);
00981 }
00982
00983 exif_mem_unref (mem);
00984 }
00985
00986 void
00987 exif_data_dump (ExifData *data)
00988 {
00989 unsigned int i;
00990
00991 if (!data)
00992 return;
00993
00994 for (i = 0; i < EXIF_IFD_COUNT; i++) {
00995 if (data->ifd[i] && data->ifd[i]->count) {
00996 printf ("Dumping IFD '%s'...\n",
00997 exif_ifd_get_name (i));
00998 exif_content_dump (data->ifd[i], 0);
00999 }
01000 }
01001
01002 if (data->data) {
01003 printf ("%i byte(s) thumbnail data available.", data->size);
01004 if (data->size >= 4) {
01005 printf ("0x%02x 0x%02x ... 0x%02x 0x%02x\n",
01006 data->data[0], data->data[1],
01007 data->data[data->size - 2],
01008 data->data[data->size - 1]);
01009 }
01010 }
01011 }
01012
01013 ExifByteOrder
01014 exif_data_get_byte_order (ExifData *data)
01015 {
01016 if (!data)
01017 return (0);
01018
01019 return (data->priv->order);
01020 }
01021
01022 void
01023 exif_data_foreach_content (ExifData *data, ExifDataForeachContentFunc func,
01024 void *user_data)
01025 {
01026 unsigned int i;
01027
01028 if (!data || !func)
01029 return;
01030
01031 for (i = 0; i < EXIF_IFD_COUNT; i++)
01032 func (data->ifd[i], user_data);
01033 }
01034
01035 typedef struct _ByteOrderChangeData ByteOrderChangeData;
01036 struct _ByteOrderChangeData {
01037 ExifByteOrder old, new;
01038 };
01039
01040 static void
01041 entry_set_byte_order (ExifEntry *e, void *data)
01042 {
01043 ByteOrderChangeData *d = data;
01044
01045 if (!e)
01046 return;
01047
01048 exif_array_set_byte_order (e->format, e->data, e->components, d->old, d->new);
01049 }
01050
01051 static void
01052 content_set_byte_order (ExifContent *content, void *data)
01053 {
01054 exif_content_foreach_entry (content, entry_set_byte_order, data);
01055 }
01056
01057 void
01058 exif_data_set_byte_order (ExifData *data, ExifByteOrder order)
01059 {
01060 ByteOrderChangeData d;
01061
01062 if (!data || (order == data->priv->order))
01063 return;
01064
01065 d.old = data->priv->order;
01066 d.new = order;
01067 exif_data_foreach_content (data, content_set_byte_order, &d);
01068 data->priv->order = order;
01069 if (data->priv->md)
01070 exif_mnote_data_set_byte_order (data->priv->md, order);
01071 }
01072
01073 void
01074 exif_data_log (ExifData *data, ExifLog *log)
01075 {
01076 unsigned int i;
01077
01078 if (!data || !data->priv)
01079 return;
01080 exif_log_unref (data->priv->log);
01081 data->priv->log = log;
01082 exif_log_ref (log);
01083
01084 for (i = 0; i < EXIF_IFD_COUNT; i++)
01085 exif_content_log (data->ifd[i], log);
01086 }
01087
01088
01089 ExifLog *exif_data_get_log (ExifData *);
01090 ExifLog *
01091 exif_data_get_log (ExifData *data)
01092 {
01093 if (!data || !data->priv)
01094 return NULL;
01095 return data->priv->log;
01096 }
01097
01098 static struct {
01099 ExifDataOption option;
01100 const char *name;
01101 const char *description;
01102 } exif_data_option[] = {
01103 {EXIF_DATA_OPTION_IGNORE_UNKNOWN_TAGS, N_("Ignore unknown tags"),
01104 N_("Ignore unknown tags when loading EXIF data.")},
01105 {EXIF_DATA_OPTION_FOLLOW_SPECIFICATION, N_("Follow specification"),
01106 N_("Add, correct and remove entries to get EXIF data that follows "
01107 "the specification.")},
01108 {0, NULL, NULL}
01109 };
01110
01111 const char *
01112 exif_data_option_get_name (ExifDataOption o)
01113 {
01114 unsigned int i;
01115
01116 for (i = 0; exif_data_option[i].name; i++)
01117 if (exif_data_option[i].option == o)
01118 break;
01119 return _(exif_data_option[i].name);
01120 }
01121
01122 const char *
01123 exif_data_option_get_description (ExifDataOption o)
01124 {
01125 unsigned int i;
01126
01127 for (i = 0; exif_data_option[i].description; i++)
01128 if (exif_data_option[i].option == o)
01129 break;
01130 return _(exif_data_option[i].description);
01131 }
01132
01133 void
01134 exif_data_set_option (ExifData *d, ExifDataOption o)
01135 {
01136 if (!d)
01137 return;
01138
01139 d->priv->options |= o;
01140 }
01141
01142 void
01143 exif_data_unset_option (ExifData *d, ExifDataOption o)
01144 {
01145 if (!d)
01146 return;
01147
01148 d->priv->options &= ~o;
01149 }
01150
01151 static void
01152 fix_func (ExifContent *c, void *data)
01153 {
01154 switch (exif_content_get_ifd (c)) {
01155 case EXIF_IFD_1:
01156 if (c->parent->data)
01157 exif_content_fix (c);
01158 else {
01159 exif_log (c->parent->priv->log, EXIF_LOG_CODE_DEBUG, "exif-data",
01160 "No thumbnail but entries on thumbnail. These entries have been "
01161 "removed.");
01162 while (c->count)
01163 exif_content_remove_entry (c, c->entries[c->count - 1]);
01164 }
01165 break;
01166 default:
01167 exif_content_fix (c);
01168 }
01169 }
01170
01171 void
01172 exif_data_fix (ExifData *d)
01173 {
01174 exif_data_foreach_content (d, fix_func, NULL);
01175 }
01176
01177 void
01178 exif_data_set_data_type (ExifData *d, ExifDataType dt)
01179 {
01180 if (!d || !d->priv)
01181 return;
01182
01183 d->priv->data_type = dt;
01184 }
01185
01186 ExifDataType
01187 exif_data_get_data_type (ExifData *d)
01188 {
01189 return (d && d->priv) ? d->priv->data_type : EXIF_DATA_TYPE_COUNT;
01190 }