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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 void
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 s = exif_format_get_size(entry->format) * entry->components;
00176 if (s < entry->components) {
00177 return 0;
00178 }
00179 if (0 == s)
00180 return 0;
00181
00182
00183
00184
00185
00186 if (s > 4)
00187 doff = exif_get_long (d + offset + 8, data->priv->order);
00188 else
00189 doff = offset + 8;
00190
00191
00192 if ((doff + s < doff) || (doff + s < s))
00193 return 0;
00194 if (size < doff + s)
00195 return;
00196
00197 entry->data = exif_data_alloc (data, s);
00198 if (entry->data) {
00199 entry->size = s;
00200 memcpy (entry->data, d + doff, s);
00201 }
00202
00203
00204 if (entry->tag == EXIF_TAG_MAKER_NOTE) {
00205 if (!entry->data) {
00206 exif_log (data->priv->log,
00207 EXIF_LOG_CODE_DEBUG, "ExifData",
00208 "MakerNote found with NULL data");
00209 }
00210 else if (entry->size > 6)
00211 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG,
00212 "MakerNote found (%02x %02x %02x %02x "
00213 "%02x %02x %02x...).",
00214 entry->data[0], entry->data[1], entry->data[2],
00215 entry->data[3], entry->data[4], entry->data[5],
00216 entry->data[6]);
00217 data->priv->offset_mnote = doff;
00218 }
00219 }
00220
00221 static void
00222 exif_data_save_data_entry (ExifData *data, ExifEntry *e,
00223 unsigned char **d, unsigned int *ds,
00224 unsigned int offset)
00225 {
00226 unsigned int doff, s;
00227
00228 if (!data || !data->priv)
00229 return;
00230
00231
00232
00233
00234
00235 exif_set_short (*d + 6 + offset + 0,
00236 data->priv->order, (ExifShort) e->tag);
00237 exif_set_short (*d + 6 + offset + 2,
00238 data->priv->order, (ExifShort) e->format);
00239
00240 #ifndef EXIF_DONT_CHANGE_MAKER_NOTE
00241
00242 if ((e->tag == EXIF_TAG_MAKER_NOTE) && data->priv->md) {
00243 exif_mem_free (data->priv->mem, e->data);
00244 e->data = NULL;
00245 e->size = 0;
00246 exif_mnote_data_set_offset (data->priv->md, *ds - 6);
00247 exif_mnote_data_save (data->priv->md, &e->data, &e->size);
00248 e->components = e->size;
00249 }
00250 #endif
00251
00252 exif_set_long (*d + 6 + offset + 4,
00253 data->priv->order, e->components);
00254
00255
00256
00257
00258
00259 s = exif_format_get_size (e->format) * e->components;
00260 if (s > 4) {
00261 doff = *ds - 6;
00262 *ds += s;
00263
00264
00265
00266
00267
00268
00269 if (s & 1)
00270 (*ds)++;
00271 *d = exif_mem_realloc (data->priv->mem, *d, *ds);
00272 if (!*d) {
00273 EXIF_LOG_NO_MEMORY (data->priv->log, "ExifData", *ds);
00274 return;
00275 }
00276 exif_set_long (*d + 6 + offset + 8, data->priv->order, doff);
00277 if (s & 1)
00278 *(*d + *ds - 1) = '\0';
00279
00280 } else
00281 doff = offset + 8;
00282
00283
00284 memcpy (*d + 6 + doff, e->data, s);
00285 if (s < 4)
00286 memset (*d + 6 + doff + s, 0, (4 - s));
00287 }
00288
00289 static void
00290 exif_data_load_data_thumbnail (ExifData *data, const unsigned char *d,
00291 unsigned int ds, ExifLong offset, ExifLong size)
00292 {
00293 if (ds < offset + size || (offset < 0) || (size < 0) || (offset + size < offset)) {
00294 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
00295 "Bogus thumbnail offset and size");
00296 return;
00297 }
00298 if (data->data)
00299 exif_mem_free (data->priv->mem, data->data);
00300 data->size = size;
00301 data->data = exif_data_alloc (data, data->size);
00302 if (!data->data)
00303 return;
00304 memcpy (data->data, d + offset, data->size);
00305 }
00306
00307 #undef CHECK_REC
00308 #define CHECK_REC(i) \
00309 if ((i) == ifd) { \
00310 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, \
00311 "ExifData", "Recursive entry in IFD " \
00312 "'%s' detected. Skipping...", \
00313 exif_ifd_get_name (i)); \
00314 break; \
00315 } \
00316 if (data->ifd[(i)]->count) { \
00317 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, \
00318 "ExifData", "Attemt to load IFD " \
00319 "'%s' multiple times detected. " \
00320 "Skipping...", \
00321 exif_ifd_get_name (i)); \
00322 break; \
00323 }
00324
00325 static void
00326 exif_data_load_data_content (ExifData *data, ExifIfd ifd,
00327 const unsigned char *d,
00328 unsigned int ds, unsigned int offset, unsigned int recursion_depth)
00329 {
00330 ExifLong o, thumbnail_offset = 0, thumbnail_length = 0;
00331 ExifShort n;
00332 ExifEntry *entry;
00333 unsigned int i;
00334 ExifTag tag;
00335
00336 if (!data || !data->priv)
00337 return;
00338 if ((ifd < 0) || (ifd >= EXIF_IFD_COUNT))
00339 return;
00340
00341 if (recursion_depth > 150) {
00342 exif_log (data->priv->log, EXIF_LOG_CODE_CORRUPT_DATA, "ExifData",
00343 "Deep recursion detected!");
00344 return;
00345 }
00346
00347
00348 if (offset >= ds - 1)
00349 return;
00350 n = exif_get_short (d + offset, data->priv->order);
00351 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
00352 "Loading %i entries...", n);
00353 offset += 2;
00354
00355
00356 if (offset + 12 * n > ds)
00357 n = (ds - offset) / 12;
00358
00359 for (i = 0; i < n; i++) {
00360
00361 tag = exif_get_short (d + offset + 12 * i, data->priv->order);
00362 switch (tag) {
00363 case EXIF_TAG_EXIF_IFD_POINTER:
00364 case EXIF_TAG_GPS_INFO_IFD_POINTER:
00365 case EXIF_TAG_INTEROPERABILITY_IFD_POINTER:
00366 case EXIF_TAG_JPEG_INTERCHANGE_FORMAT_LENGTH:
00367 case EXIF_TAG_JPEG_INTERCHANGE_FORMAT:
00368 o = exif_get_long (d + offset + 12 * i + 8,
00369 data->priv->order);
00370 switch (tag) {
00371 case EXIF_TAG_EXIF_IFD_POINTER:
00372 CHECK_REC (EXIF_IFD_EXIF);
00373 exif_data_load_data_content (data, EXIF_IFD_EXIF, d, ds, o, recursion_depth + 1);
00374 break;
00375 case EXIF_TAG_GPS_INFO_IFD_POINTER:
00376 CHECK_REC (EXIF_IFD_GPS);
00377 exif_data_load_data_content (data, EXIF_IFD_GPS, d, ds, o, recursion_depth + 1);
00378 break;
00379 case EXIF_TAG_INTEROPERABILITY_IFD_POINTER:
00380 CHECK_REC (EXIF_IFD_INTEROPERABILITY);
00381 exif_data_load_data_content (data, EXIF_IFD_INTEROPERABILITY, d, ds, o, recursion_depth + 1);
00382 break;
00383 case EXIF_TAG_JPEG_INTERCHANGE_FORMAT:
00384 thumbnail_offset = o;
00385 if (thumbnail_offset && thumbnail_length)
00386 exif_data_load_data_thumbnail (data, d,
00387 ds, thumbnail_offset,
00388 thumbnail_length);
00389 break;
00390 case EXIF_TAG_JPEG_INTERCHANGE_FORMAT_LENGTH:
00391 thumbnail_length = o;
00392 if (thumbnail_offset && thumbnail_length)
00393 exif_data_load_data_thumbnail (data, d,
00394 ds, thumbnail_offset,
00395 thumbnail_length);
00396 break;
00397 default:
00398 return;
00399 }
00400 break;
00401 default:
00402
00403
00404
00405
00406
00407
00408 if (!exif_tag_get_name_in_ifd (tag, ifd)) {
00409
00410
00411
00412
00413
00414 if (!memcmp (d + offset + 12 * i, "\0\0\0\0", 4)) {
00415 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
00416 "Skipping empty entry at position %i in '%s'.", i,
00417 exif_ifd_get_name (ifd));
00418 break;
00419 }
00420 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
00421 "Unknown tag 0x%04x (entry %i in '%s'). Please report this tag "
00422 "to <libexif-devel@lists.sourceforge.net>.", tag, i,
00423 exif_ifd_get_name (ifd));
00424 if (data->priv->options & EXIF_DATA_OPTION_IGNORE_UNKNOWN_TAGS)
00425 break;
00426 }
00427 entry = exif_entry_new_mem (data->priv->mem);
00428 exif_data_load_data_entry (data, entry, d, ds,
00429 offset + 12 * i);
00430 exif_content_add_entry (data->ifd[ifd], entry);
00431 exif_entry_unref (entry);
00432 break;
00433 }
00434 }
00435 }
00436
00437 static int
00438 cmp_func (const unsigned char *p1, const unsigned char *p2, ExifByteOrder o)
00439 {
00440 ExifShort tag1 = exif_get_short (p1, o);
00441 ExifShort tag2 = exif_get_short (p2, o);
00442
00443 return (tag1 < tag2) ? -1 : (tag1 > tag2) ? 1 : 0;
00444 }
00445
00446 static int
00447 cmp_func_intel (const void *elem1, const void *elem2)
00448 {
00449 return cmp_func ((const unsigned char *) elem1,
00450 (const unsigned char *) elem2, EXIF_BYTE_ORDER_INTEL);
00451 }
00452
00453 static int
00454 cmp_func_motorola (const void *elem1, const void *elem2)
00455 {
00456 return cmp_func ((const unsigned char *) elem1,
00457 (const unsigned char *) elem2, EXIF_BYTE_ORDER_MOTOROLA);
00458 }
00459
00460 static void
00461 exif_data_save_data_content (ExifData *data, ExifContent *ifd,
00462 unsigned char **d, unsigned int *ds,
00463 unsigned int offset)
00464 {
00465 unsigned int j, n_ptr = 0, n_thumb = 0;
00466 ExifIfd i;
00467
00468 if (!data || !data->priv || !ifd || !d || !ds)
00469 return;
00470
00471 for (i = 0; i < EXIF_IFD_COUNT; i++)
00472 if (ifd == data->ifd[i])
00473 break;
00474 if (i == EXIF_IFD_COUNT)
00475 return;
00476
00477
00478
00479
00480 switch (i) {
00481 case EXIF_IFD_0:
00482
00483
00484
00485
00486
00487 if (data->ifd[EXIF_IFD_EXIF]->count ||
00488 data->ifd[EXIF_IFD_INTEROPERABILITY]->count)
00489 n_ptr++;
00490
00491
00492 if (data->ifd[EXIF_IFD_GPS]->count)
00493 n_ptr++;
00494
00495 break;
00496 case EXIF_IFD_1:
00497 if (data->size)
00498 n_thumb = 2;
00499 break;
00500 case EXIF_IFD_EXIF:
00501 if (data->ifd[EXIF_IFD_INTEROPERABILITY]->count)
00502 n_ptr++;
00503 default:
00504 break;
00505 }
00506
00507
00508
00509
00510
00511 *ds += (2 + (ifd->count + n_ptr + n_thumb) * 12 + 4);
00512 *d = exif_mem_realloc (data->priv->mem, *d, *ds);
00513 if (!*d) {
00514 EXIF_LOG_NO_MEMORY (data->priv->log, "ExifData", *ds);
00515 return;
00516 }
00517
00518
00519 exif_set_short (*d + 6 + offset, data->priv->order,
00520 (ExifShort) (ifd->count + n_ptr + n_thumb));
00521 offset += 2;
00522
00523
00524 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
00525 "Saving %i entries (IFD '%s', offset: %i)...",
00526 ifd->count, exif_ifd_get_name (i), offset);
00527 for (j = 0; j < ifd->count; j++)
00528 exif_data_save_data_entry (data, ifd->entries[j], d, ds, offset + 12 * j);
00529
00530 offset += 12 * ifd->count;
00531
00532
00533 switch (i) {
00534 case EXIF_IFD_0:
00535
00536
00537
00538
00539
00540
00541
00542 if (data->ifd[EXIF_IFD_EXIF]->count ||
00543 data->ifd[EXIF_IFD_INTEROPERABILITY]->count) {
00544 exif_set_short (*d + 6 + offset + 0, data->priv->order,
00545 EXIF_TAG_EXIF_IFD_POINTER);
00546 exif_set_short (*d + 6 + offset + 2, data->priv->order,
00547 EXIF_FORMAT_LONG);
00548 exif_set_long (*d + 6 + offset + 4, data->priv->order,
00549 1);
00550 exif_set_long (*d + 6 + offset + 8, data->priv->order,
00551 *ds - 6);
00552 exif_data_save_data_content (data,
00553 data->ifd[EXIF_IFD_EXIF], d, ds, *ds - 6);
00554 offset += 12;
00555 }
00556
00557
00558 if (data->ifd[EXIF_IFD_GPS]->count) {
00559 exif_set_short (*d + 6 + offset + 0, data->priv->order,
00560 EXIF_TAG_GPS_INFO_IFD_POINTER);
00561 exif_set_short (*d + 6 + offset + 2, data->priv->order,
00562 EXIF_FORMAT_LONG);
00563 exif_set_long (*d + 6 + offset + 4, data->priv->order,
00564 1);
00565 exif_set_long (*d + 6 + offset + 8, data->priv->order,
00566 *ds - 6);
00567 exif_data_save_data_content (data,
00568 data->ifd[EXIF_IFD_GPS], d, ds, *ds - 6);
00569 offset += 12;
00570 }
00571
00572 break;
00573 case EXIF_IFD_EXIF:
00574
00575
00576
00577
00578
00579 if (data->ifd[EXIF_IFD_INTEROPERABILITY]->count) {
00580 exif_set_short (*d + 6 + offset + 0, data->priv->order,
00581 EXIF_TAG_INTEROPERABILITY_IFD_POINTER);
00582 exif_set_short (*d + 6 + offset + 2, data->priv->order,
00583 EXIF_FORMAT_LONG);
00584 exif_set_long (*d + 6 + offset + 4, data->priv->order,
00585 1);
00586 exif_set_long (*d + 6 + offset + 8, data->priv->order,
00587 *ds - 6);
00588 exif_data_save_data_content (data,
00589 data->ifd[EXIF_IFD_INTEROPERABILITY], d, ds,
00590 *ds - 6);
00591 offset += 12;
00592 }
00593
00594 break;
00595 case EXIF_IFD_1:
00596
00597
00598
00599
00600
00601 if (data->size) {
00602
00603
00604 exif_set_short (*d + 6 + offset + 0, data->priv->order,
00605 EXIF_TAG_JPEG_INTERCHANGE_FORMAT);
00606 exif_set_short (*d + 6 + offset + 2, data->priv->order,
00607 EXIF_FORMAT_LONG);
00608 exif_set_long (*d + 6 + offset + 4, data->priv->order,
00609 1);
00610 exif_set_long (*d + 6 + offset + 8, data->priv->order,
00611 *ds - 6);
00612 *ds += data->size;
00613 *d = exif_mem_realloc (data->priv->mem, *d, *ds);
00614 if (!*d) {
00615 EXIF_LOG_NO_MEMORY (data->priv->log, "ExifData",
00616 *ds);
00617 return;
00618 }
00619 memcpy (*d + *ds - data->size, data->data, data->size);
00620 offset += 12;
00621
00622
00623 exif_set_short (*d + 6 + offset + 0, data->priv->order,
00624 EXIF_TAG_JPEG_INTERCHANGE_FORMAT_LENGTH);
00625 exif_set_short (*d + 6 + offset + 2, data->priv->order,
00626 EXIF_FORMAT_LONG);
00627 exif_set_long (*d + 6 + offset + 4, data->priv->order,
00628 1);
00629 exif_set_long (*d + 6 + offset + 8, data->priv->order,
00630 data->size);
00631 offset += 12;
00632 }
00633
00634 break;
00635 default:
00636 break;
00637 }
00638
00639
00640 qsort (*d + 6 + offset - (ifd->count + n_ptr + n_thumb) * 12,
00641 (ifd->count + n_ptr + n_thumb), 12,
00642 (data->priv->order == EXIF_BYTE_ORDER_INTEL) ? cmp_func_intel : cmp_func_motorola);
00643
00644
00645 if (i == EXIF_IFD_0 && (data->ifd[EXIF_IFD_1]->count ||
00646 data->size)) {
00647
00648
00649
00650
00651
00652 exif_set_long (*d + 6 + offset, data->priv->order, *ds - 6);
00653 exif_data_save_data_content (data, data->ifd[EXIF_IFD_1], d, ds,
00654 *ds - 6);
00655 } else
00656 exif_set_long (*d + 6 + offset, data->priv->order, 0);
00657 }
00658
00659 typedef enum {
00660 EXIF_DATA_TYPE_MAKER_NOTE_NONE = 0,
00661 EXIF_DATA_TYPE_MAKER_NOTE_CANON = 1,
00662 EXIF_DATA_TYPE_MAKER_NOTE_OLYMPUS = 2,
00663 EXIF_DATA_TYPE_MAKER_NOTE_PENTAX = 3
00664 } ExifDataTypeMakerNote;
00665
00666 static ExifDataTypeMakerNote
00667 exif_data_get_type_maker_note (ExifData *d)
00668 {
00669 ExifEntry *e, *em;
00670 char value[1024];
00671
00672 if (!d)
00673 return EXIF_DATA_TYPE_MAKER_NOTE_NONE;
00674
00675 e = exif_data_get_entry (d, EXIF_TAG_MAKER_NOTE);
00676 if (!e)
00677 return EXIF_DATA_TYPE_MAKER_NOTE_NONE;
00678
00679
00680 if ((e->size >= 5) && (!memcmp (e->data, "OLYMP", 5) ||
00681 !memcmp (e->data, "Nikon", 5)))
00682 return EXIF_DATA_TYPE_MAKER_NOTE_OLYMPUS;
00683
00684 em = exif_data_get_entry (d, EXIF_TAG_MAKE);
00685 if (!em)
00686 return EXIF_DATA_TYPE_MAKER_NOTE_NONE;
00687
00688
00689 if (!strcmp (exif_entry_get_value (em, value, sizeof (value)), "Canon"))
00690 return EXIF_DATA_TYPE_MAKER_NOTE_CANON;
00691
00692
00693 if ((e->size >= 2) && (e->data[0] == 0x00) && (e->data[1] == 0x1b)) {
00694 if (!strncasecmp (
00695 exif_entry_get_value (em, value, sizeof(value)),
00696 "Nikon", 5))
00697 return EXIF_DATA_TYPE_MAKER_NOTE_OLYMPUS;
00698 else
00699 return EXIF_DATA_TYPE_MAKER_NOTE_PENTAX;
00700 }
00701
00702 return EXIF_DATA_TYPE_MAKER_NOTE_NONE;
00703 }
00704
00705 #define LOG_TOO_SMALL \
00706 exif_log (data->priv->log, EXIF_LOG_CODE_CORRUPT_DATA, "ExifData", \
00707 _("Size of data too small to allow for EXIF data."));
00708
00709 void
00710 exif_data_load_data (ExifData *data, const unsigned char *d_orig,
00711 unsigned int ds_orig)
00712 {
00713 unsigned int l;
00714 ExifLong offset;
00715 ExifShort n;
00716 const unsigned char *d = d_orig;
00717 unsigned int ds = ds_orig, len;
00718
00719 if (!data || !data->priv || !d || !ds)
00720 return;
00721
00722 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
00723 "Parsing %i byte(s) EXIF data...\n", ds);
00724
00725
00726
00727
00728
00729 if (ds < 6) {
00730 LOG_TOO_SMALL;
00731 return;
00732 }
00733 if (!memcmp (d, ExifHeader, 6)) {
00734 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
00735 "Found EXIF header.");
00736 } else {
00737 while (1) {
00738 while ((d[0] == 0xff) && ds) {
00739 d++;
00740 ds--;
00741 }
00742
00743
00744 if (d[0] == JPEG_MARKER_SOI) {
00745 d++;
00746 ds--;
00747 continue;
00748 }
00749
00750
00751 if (d[0] == JPEG_MARKER_APP0) {
00752 d++;
00753 ds--;
00754 l = (d[0] << 8) | d[1];
00755 if (l > ds)
00756 return;
00757 d += l;
00758 ds -= l;
00759 continue;
00760 }
00761
00762
00763 if (d[0] == JPEG_MARKER_APP1)
00764 break;
00765
00766
00767 exif_log (data->priv->log, EXIF_LOG_CODE_CORRUPT_DATA,
00768 "ExifData", _("EXIF marker not found."));
00769 return;
00770 }
00771 d++;
00772 ds--;
00773 if (ds < 2) {
00774 LOG_TOO_SMALL;
00775 return;
00776 }
00777 len = (d[0] << 8) | d[1];
00778 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
00779 "We have to deal with %i byte(s) of EXIF data.",
00780 len);
00781 d += 2;
00782 ds -= 2;
00783 }
00784
00785
00786
00787
00788
00789 if (ds < 6) {
00790 LOG_TOO_SMALL;
00791 return;
00792 }
00793 if (memcmp (d, ExifHeader, 6)) {
00794 exif_log (data->priv->log, EXIF_LOG_CODE_CORRUPT_DATA,
00795 "ExifData", _("EXIF header not found."));
00796 return;
00797 }
00798
00799 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
00800 "Found EXIF header.");
00801
00802
00803 if (ds < 14)
00804 return;
00805 if (!memcmp (d + 6, "II", 2))
00806 data->priv->order = EXIF_BYTE_ORDER_INTEL;
00807 else if (!memcmp (d + 6, "MM", 2))
00808 data->priv->order = EXIF_BYTE_ORDER_MOTOROLA;
00809 else {
00810 exif_log (data->priv->log, EXIF_LOG_CODE_CORRUPT_DATA,
00811 "ExifData", _("Unknown encoding."));
00812 return;
00813 }
00814
00815
00816 if (exif_get_short (d + 8, data->priv->order) != 0x002a)
00817 return;
00818
00819
00820 offset = exif_get_long (d + 10, data->priv->order);
00821 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
00822 "IFD 0 at %i.", (int) offset);
00823
00824
00825 exif_data_load_data_content (data, EXIF_IFD_0, d + 6, ds - 6, offset, 0);
00826
00827
00828 if (offset + 6 + 2 > ds) {
00829 return;
00830 }
00831 n = exif_get_short (d + 6 + offset, data->priv->order);
00832 if (offset + 6 + 2 + 12 * n + 4 > ds) {
00833 return;
00834 }
00835 offset = exif_get_long (d + 6 + offset + 2 + 12 * n, data->priv->order);
00836 if (offset) {
00837 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
00838 "IFD 1 at %i.", (int) offset);
00839
00840
00841 if (offset > ds - 6) {
00842 exif_log (data->priv->log, EXIF_LOG_CODE_CORRUPT_DATA,
00843 "ExifData", "Bogus offset of IFD1.");
00844 } else {
00845 exif_data_load_data_content (data, EXIF_IFD_1, d + 6, ds - 6, offset, 0);
00846 }
00847 }
00848
00849
00850
00851
00852
00853
00854
00855 switch (exif_data_get_type_maker_note (data)) {
00856 case EXIF_DATA_TYPE_MAKER_NOTE_OLYMPUS:
00857 data->priv->md = exif_mnote_data_olympus_new (data->priv->mem);
00858 break;
00859 case EXIF_DATA_TYPE_MAKER_NOTE_PENTAX:
00860 data->priv->md = exif_mnote_data_pentax_new (data->priv->mem);
00861 break;
00862 case EXIF_DATA_TYPE_MAKER_NOTE_CANON:
00863 data->priv->md = exif_mnote_data_canon_new (data->priv->mem);
00864 break;
00865 default:
00866 break;
00867 }
00868
00869
00870
00871
00872 if (data->priv->md) {
00873 exif_mnote_data_log (data->priv->md, data->priv->log);
00874 exif_mnote_data_set_byte_order (data->priv->md,
00875 data->priv->order);
00876 exif_mnote_data_set_offset (data->priv->md,
00877 data->priv->offset_mnote);
00878 exif_mnote_data_load (data->priv->md, d, ds);
00879 }
00880
00881 if (data->priv->options & EXIF_DATA_OPTION_FOLLOW_SPECIFICATION)
00882 exif_data_fix (data);
00883 }
00884
00885 void
00886 exif_data_save_data (ExifData *data, unsigned char **d, unsigned int *ds)
00887 {
00888 if (!data || !d || !ds)
00889 return;
00890
00891
00892 *ds = 14;
00893 *d = exif_data_alloc (data, *ds);
00894 if (!*d)
00895 return;
00896 memcpy (*d, ExifHeader, 6);
00897
00898
00899 if (data->priv->order == EXIF_BYTE_ORDER_INTEL) {
00900 memcpy (*d + 6, "II", 2);
00901 } else {
00902 memcpy (*d + 6, "MM", 2);
00903 }
00904
00905
00906 exif_set_short (*d + 8, data->priv->order, 0x002a);
00907
00908
00909
00910
00911
00912
00913
00914 exif_set_long (*d + 10, data->priv->order, 8);
00915
00916
00917 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
00918 "Saving IFDs...");
00919 exif_data_save_data_content (data, data->ifd[EXIF_IFD_0], d, ds,
00920 *ds - 6);
00921 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
00922 "Saved %i byte(s) EXIF data.", *ds);
00923 }
00924
00925 ExifData *
00926 exif_data_new_from_file (const char *path)
00927 {
00928 ExifData *edata;
00929 ExifLoader *loader;
00930
00931 loader = exif_loader_new ();
00932 exif_loader_write_file (loader, path);
00933 edata = exif_loader_get_data (loader);
00934 exif_loader_unref (loader);
00935
00936 return (edata);
00937 }
00938
00939 void
00940 exif_data_ref (ExifData *data)
00941 {
00942 if (!data)
00943 return;
00944
00945 data->priv->ref_count++;
00946 }
00947
00948 void
00949 exif_data_unref (ExifData *data)
00950 {
00951 if (!data)
00952 return;
00953
00954 data->priv->ref_count--;
00955 if (!data->priv->ref_count)
00956 exif_data_free (data);
00957 }
00958
00959 void
00960 exif_data_free (ExifData *data)
00961 {
00962 unsigned int i;
00963 ExifMem *mem = (data && data->priv) ? data->priv->mem : NULL;
00964
00965 if (!data)
00966 return;
00967
00968 for (i = 0; i < EXIF_IFD_COUNT; i++) {
00969 if (data->ifd[i]) {
00970 exif_content_unref (data->ifd[i]);
00971 data->ifd[i] = NULL;
00972 }
00973 }
00974
00975 if (data->data) {
00976 exif_mem_free (mem, data->data);
00977 data->data = NULL;
00978 }
00979
00980 if (data->priv) {
00981 if (data->priv->log) {
00982 exif_log_unref (data->priv->log);
00983 data->priv->log = NULL;
00984 }
00985 if (data->priv->md) {
00986 exif_mnote_data_unref (data->priv->md);
00987 data->priv->md = NULL;
00988 }
00989 exif_mem_free (mem, data->priv);
00990 exif_mem_free (mem, data);
00991 }
00992
00993 exif_mem_unref (mem);
00994 }
00995
00996 void
00997 exif_data_dump (ExifData *data)
00998 {
00999 unsigned int i;
01000
01001 if (!data)
01002 return;
01003
01004 for (i = 0; i < EXIF_IFD_COUNT; i++) {
01005 if (data->ifd[i] && data->ifd[i]->count) {
01006 printf ("Dumping IFD '%s'...\n",
01007 exif_ifd_get_name (i));
01008 exif_content_dump (data->ifd[i], 0);
01009 }
01010 }
01011
01012 if (data->data) {
01013 printf ("%i byte(s) thumbnail data available.", data->size);
01014 if (data->size >= 4) {
01015 printf ("0x%02x 0x%02x ... 0x%02x 0x%02x\n",
01016 data->data[0], data->data[1],
01017 data->data[data->size - 2],
01018 data->data[data->size - 1]);
01019 }
01020 }
01021 }
01022
01023 ExifByteOrder
01024 exif_data_get_byte_order (ExifData *data)
01025 {
01026 if (!data)
01027 return (0);
01028
01029 return (data->priv->order);
01030 }
01031
01032 void
01033 exif_data_foreach_content (ExifData *data, ExifDataForeachContentFunc func,
01034 void *user_data)
01035 {
01036 unsigned int i;
01037
01038 if (!data || !func)
01039 return;
01040
01041 for (i = 0; i < EXIF_IFD_COUNT; i++)
01042 func (data->ifd[i], user_data);
01043 }
01044
01045 typedef struct _ByteOrderChangeData ByteOrderChangeData;
01046 struct _ByteOrderChangeData {
01047 ExifByteOrder old, new;
01048 };
01049
01050 static void
01051 entry_set_byte_order (ExifEntry *e, void *data)
01052 {
01053 ByteOrderChangeData *d = data;
01054
01055 if (!e)
01056 return;
01057
01058 exif_array_set_byte_order (e->format, e->data, e->components, d->old, d->new);
01059 }
01060
01061 static void
01062 content_set_byte_order (ExifContent *content, void *data)
01063 {
01064 exif_content_foreach_entry (content, entry_set_byte_order, data);
01065 }
01066
01067 void
01068 exif_data_set_byte_order (ExifData *data, ExifByteOrder order)
01069 {
01070 ByteOrderChangeData d;
01071
01072 if (!data || (order == data->priv->order))
01073 return;
01074
01075 d.old = data->priv->order;
01076 d.new = order;
01077 exif_data_foreach_content (data, content_set_byte_order, &d);
01078 data->priv->order = order;
01079 if (data->priv->md)
01080 exif_mnote_data_set_byte_order (data->priv->md, order);
01081 }
01082
01083 void
01084 exif_data_log (ExifData *data, ExifLog *log)
01085 {
01086 unsigned int i;
01087
01088 if (!data || !data->priv)
01089 return;
01090 exif_log_unref (data->priv->log);
01091 data->priv->log = log;
01092 exif_log_ref (log);
01093
01094 for (i = 0; i < EXIF_IFD_COUNT; i++)
01095 exif_content_log (data->ifd[i], log);
01096 }
01097
01098
01099 ExifLog *exif_data_get_log (ExifData *);
01100 ExifLog *
01101 exif_data_get_log (ExifData *data)
01102 {
01103 if (!data || !data->priv)
01104 return NULL;
01105 return data->priv->log;
01106 }
01107
01108 static struct {
01109 ExifDataOption option;
01110 const char *name;
01111 const char *description;
01112 } exif_data_option[] = {
01113 {EXIF_DATA_OPTION_IGNORE_UNKNOWN_TAGS, N_("Ignore unknown tags"),
01114 N_("Ignore unknown tags when loading EXIF data.")},
01115 {EXIF_DATA_OPTION_FOLLOW_SPECIFICATION, N_("Follow specification"),
01116 N_("Add, correct and remove entries to get EXIF data that follows "
01117 "the specification.")},
01118 {0, NULL, NULL}
01119 };
01120
01121 const char *
01122 exif_data_option_get_name (ExifDataOption o)
01123 {
01124 unsigned int i;
01125
01126 for (i = 0; exif_data_option[i].name; i++)
01127 if (exif_data_option[i].option == o)
01128 break;
01129 return _(exif_data_option[i].name);
01130 }
01131
01132 const char *
01133 exif_data_option_get_description (ExifDataOption o)
01134 {
01135 unsigned int i;
01136
01137 for (i = 0; exif_data_option[i].description; i++)
01138 if (exif_data_option[i].option == o)
01139 break;
01140 return _(exif_data_option[i].description);
01141 }
01142
01143 void
01144 exif_data_set_option (ExifData *d, ExifDataOption o)
01145 {
01146 if (!d)
01147 return;
01148
01149 d->priv->options |= o;
01150 }
01151
01152 void
01153 exif_data_unset_option (ExifData *d, ExifDataOption o)
01154 {
01155 if (!d)
01156 return;
01157
01158 d->priv->options &= ~o;
01159 }
01160
01161 static void
01162 fix_func (ExifContent *c, void *data)
01163 {
01164 switch (exif_content_get_ifd (c)) {
01165 case EXIF_IFD_1:
01166 if (c->parent->data)
01167 exif_content_fix (c);
01168 else {
01169 exif_log (c->parent->priv->log, EXIF_LOG_CODE_DEBUG, "exif-data",
01170 "No thumbnail but entries on thumbnail. These entries have been "
01171 "removed.");
01172 while (c->count)
01173 exif_content_remove_entry (c, c->entries[c->count - 1]);
01174 }
01175 break;
01176 default:
01177 exif_content_fix (c);
01178 }
01179 }
01180
01181 void
01182 exif_data_fix (ExifData *d)
01183 {
01184 exif_data_foreach_content (d, fix_func, NULL);
01185 }
01186
01187 void
01188 exif_data_set_data_type (ExifData *d, ExifDataType dt)
01189 {
01190 if (!d || !d->priv)
01191 return;
01192
01193 d->priv->data_type = dt;
01194 }
01195
01196 ExifDataType
01197 exif_data_get_data_type (ExifData *d)
01198 {
01199 return (d && d->priv) ? d->priv->data_type : EXIF_DATA_TYPE_COUNT;
01200 }