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