Index: libexif/sources/libexif/exif-data.c |
=================================================================== |
--- libexif/sources/libexif/exif-data.c (revision 0) |
+++ libexif/sources/libexif/exif-data.c (revision 0) |
@@ -0,0 +1,1266 @@ |
+/* exif-data.c |
+ * |
+ * Copyright (c) 2001 Lutz Mueller <lutz@users.sourceforge.net> |
+ * |
+ * This library is free software; you can redistribute it and/or |
+ * modify it under the terms of the GNU Lesser General Public |
+ * License as published by the Free Software Foundation; either |
+ * version 2 of the License, or (at your option) any later version. |
+ * |
+ * This library is distributed in the hope that it will be useful, |
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of |
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
+ * Lesser General Public License for more details. |
+ * |
+ * You should have received a copy of the GNU Lesser General Public |
+ * License along with this library; if not, write to the |
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
+ * Boston, MA 02110-1301 USA. |
+ */ |
+ |
+#include <config.h> |
+ |
+#include <libexif/exif-mnote-data.h> |
+#include <libexif/exif-data.h> |
+#include <libexif/exif-ifd.h> |
+#include <libexif/exif-mnote-data-priv.h> |
+#include <libexif/exif-utils.h> |
+#include <libexif/exif-loader.h> |
+#include <libexif/exif-log.h> |
+#include <libexif/i18n.h> |
+#include <libexif/exif-system.h> |
+ |
+#include <libexif/canon/exif-mnote-data-canon.h> |
+#include <libexif/fuji/exif-mnote-data-fuji.h> |
+#include <libexif/olympus/exif-mnote-data-olympus.h> |
+#include <libexif/pentax/exif-mnote-data-pentax.h> |
+ |
+#include <stdlib.h> |
+#include <stdio.h> |
+#include <string.h> |
+ |
+#undef JPEG_MARKER_SOI |
+#define JPEG_MARKER_SOI 0xd8 |
+#undef JPEG_MARKER_APP0 |
+#define JPEG_MARKER_APP0 0xe0 |
+#undef JPEG_MARKER_APP1 |
+#define JPEG_MARKER_APP1 0xe1 |
+ |
+static const unsigned char ExifHeader[] = {0x45, 0x78, 0x69, 0x66, 0x00, 0x00}; |
+ |
+struct _ExifDataPrivate |
+{ |
+ ExifByteOrder order; |
+ |
+ ExifMnoteData *md; |
+ |
+ ExifLog *log; |
+ ExifMem *mem; |
+ |
+ unsigned int ref_count; |
+ |
+ /* Temporarily used while loading data */ |
+ unsigned int offset_mnote; |
+ |
+ ExifDataOption options; |
+ ExifDataType data_type; |
+}; |
+ |
+static void * |
+exif_data_alloc (ExifData *data, unsigned int i) |
+{ |
+ void *d; |
+ |
+ if (!data || !i) |
+ return NULL; |
+ |
+ d = exif_mem_alloc (data->priv->mem, i); |
+ if (d) |
+ return d; |
+ |
+ EXIF_LOG_NO_MEMORY (data->priv->log, "ExifData", i); |
+ return NULL; |
+} |
+ |
+ExifMnoteData * |
+exif_data_get_mnote_data (ExifData *d) |
+{ |
+ return (d && d->priv) ? d->priv->md : NULL; |
+} |
+ |
+ExifData * |
+exif_data_new (void) |
+{ |
+ ExifMem *mem = exif_mem_new_default (); |
+ ExifData *d = exif_data_new_mem (mem); |
+ |
+ exif_mem_unref (mem); |
+ |
+ return d; |
+} |
+ |
+ExifData * |
+exif_data_new_mem (ExifMem *mem) |
+{ |
+ ExifData *data; |
+ unsigned int i; |
+ |
+ if (!mem) |
+ return NULL; |
+ |
+ data = exif_mem_alloc (mem, sizeof (ExifData)); |
+ if (!data) |
+ return (NULL); |
+ data->priv = exif_mem_alloc (mem, sizeof (ExifDataPrivate)); |
+ if (!data->priv) { |
+ exif_mem_free (mem, data); |
+ return (NULL); |
+ } |
+ data->priv->ref_count = 1; |
+ |
+ data->priv->mem = mem; |
+ exif_mem_ref (mem); |
+ |
+ for (i = 0; i < EXIF_IFD_COUNT; i++) { |
+ data->ifd[i] = exif_content_new_mem (data->priv->mem); |
+ if (!data->ifd[i]) { |
+ exif_data_free (data); |
+ return (NULL); |
+ } |
+ data->ifd[i]->parent = data; |
+ } |
+ |
+ /* Default options */ |
+#ifndef NO_VERBOSE_TAG_STRINGS |
+ /* |
+ * When the tag list is compiled away, setting this option prevents |
+ * any tags from being loaded |
+ */ |
+ exif_data_set_option (data, EXIF_DATA_OPTION_IGNORE_UNKNOWN_TAGS); |
+#endif |
+ exif_data_set_option (data, EXIF_DATA_OPTION_FOLLOW_SPECIFICATION); |
+ |
+ /* Default data type: none */ |
+ exif_data_set_data_type (data, EXIF_DATA_TYPE_COUNT); |
+ |
+ return (data); |
+} |
+ |
+ExifData * |
+exif_data_new_from_data (const unsigned char *data, unsigned int size) |
+{ |
+ ExifData *edata; |
+ |
+ edata = exif_data_new (); |
+ exif_data_load_data (edata, data, size); |
+ return (edata); |
+} |
+ |
+static int |
+exif_data_load_data_entry (ExifData *data, ExifEntry *entry, |
+ const unsigned char *d, |
+ unsigned int size, unsigned int offset) |
+{ |
+ unsigned int s, doff; |
+ |
+ entry->tag = exif_get_short (d + offset + 0, data->priv->order); |
+ entry->format = exif_get_short (d + offset + 2, data->priv->order); |
+ entry->components = exif_get_long (d + offset + 4, data->priv->order); |
+ |
+ /* FIXME: should use exif_tag_get_name_in_ifd here but entry->parent |
+ * has not been set yet |
+ */ |
+ exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData", |
+ "Loading entry 0x%x ('%s')...", entry->tag, |
+ exif_tag_get_name (entry->tag)); |
+ |
+ /* {0,1,2,4,8} x { 0x00000000 .. 0xffffffff } |
+ * -> { 0x000000000 .. 0x7fffffff8 } */ |
+ s = exif_format_get_size(entry->format) * entry->components; |
+ if ((s < entry->components) || (s == 0)){ |
+ return 0; |
+ } |
+ |
+ /* |
+ * Size? If bigger than 4 bytes, the actual data is not |
+ * in the entry but somewhere else (offset). |
+ */ |
+ if (s > 4) |
+ doff = exif_get_long (d + offset + 8, data->priv->order); |
+ else |
+ doff = offset + 8; |
+ |
+ /* Sanity checks */ |
+ if ((doff + s < doff) || (doff + s < s) || (doff + s > size)) { |
+ exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData", |
+ "Tag data past end of buffer (%u > %u)", doff+s, size); |
+ return 0; |
+ } |
+ |
+ entry->data = exif_data_alloc (data, s); |
+ if (entry->data) { |
+ entry->size = s; |
+ memcpy (entry->data, d + doff, s); |
+ } else { |
+ /* FIXME: What do our callers do if (entry->data == NULL)? */ |
+ EXIF_LOG_NO_MEMORY(data->priv->log, "ExifData", s); |
+ } |
+ |
+ /* If this is the MakerNote, remember the offset */ |
+ if (entry->tag == EXIF_TAG_MAKER_NOTE) { |
+ if (!entry->data) { |
+ exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData", |
+ "MakerNote found with empty data"); |
+ } else if (entry->size > 6) { |
+ exif_log (data->priv->log, |
+ EXIF_LOG_CODE_DEBUG, "ExifData", |
+ "MakerNote found (%02x %02x %02x %02x " |
+ "%02x %02x %02x...).", |
+ entry->data[0], entry->data[1], entry->data[2], |
+ entry->data[3], entry->data[4], entry->data[5], |
+ entry->data[6]); |
+ } |
+ data->priv->offset_mnote = doff; |
+ } |
+ return 1; |
+} |
+ |
+static void |
+exif_data_save_data_entry (ExifData *data, ExifEntry *e, |
+ unsigned char **d, unsigned int *ds, |
+ unsigned int offset) |
+{ |
+ unsigned int doff, s; |
+ unsigned int ts; |
+ |
+ if (!data || !data->priv) |
+ return; |
+ |
+ /* |
+ * Each entry is 12 bytes long. The memory for the entry has |
+ * already been allocated. |
+ */ |
+ exif_set_short (*d + 6 + offset + 0, |
+ data->priv->order, (ExifShort) e->tag); |
+ exif_set_short (*d + 6 + offset + 2, |
+ data->priv->order, (ExifShort) e->format); |
+ |
+ if (!(data->priv->options & EXIF_DATA_OPTION_DONT_CHANGE_MAKER_NOTE)) { |
+ /* If this is the maker note tag, update it. */ |
+ if ((e->tag == EXIF_TAG_MAKER_NOTE) && data->priv->md) { |
+ /* TODO: this is using the wrong ExifMem to free e->data */ |
+ exif_mem_free (data->priv->mem, e->data); |
+ e->data = NULL; |
+ e->size = 0; |
+ exif_mnote_data_set_offset (data->priv->md, *ds - 6); |
+ exif_mnote_data_save (data->priv->md, &e->data, &e->size); |
+ e->components = e->size; |
+ } |
+ } |
+ |
+ exif_set_long (*d + 6 + offset + 4, |
+ data->priv->order, e->components); |
+ |
+ /* |
+ * Size? If bigger than 4 bytes, the actual data is not in |
+ * the entry but somewhere else. |
+ */ |
+ s = exif_format_get_size (e->format) * e->components; |
+ if (s > 4) { |
+ unsigned char *t; |
+ doff = *ds - 6; |
+ ts = *ds + s; |
+ |
+ /* |
+ * According to the TIFF specification, |
+ * the offset must be an even number. If we need to introduce |
+ * a padding byte, we set it to 0. |
+ */ |
+ if (s & 1) |
+ ts++; |
+ t = exif_mem_realloc (data->priv->mem, *d, ts); |
+ if (!t) { |
+ EXIF_LOG_NO_MEMORY (data->priv->log, "ExifData", ts); |
+ return; |
+ } |
+ *d = t; |
+ *ds = ts; |
+ exif_set_long (*d + 6 + offset + 8, data->priv->order, doff); |
+ if (s & 1) |
+ *(*d + *ds - 1) = '\0'; |
+ |
+ } else |
+ doff = offset + 8; |
+ |
+ /* Write the data. Fill unneeded bytes with 0. Do not crash with |
+ * e->data is NULL */ |
+ if (e->data) { |
+ memcpy (*d + 6 + doff, e->data, s); |
+ } else { |
+ memset (*d + 6 + doff, 0, s); |
+ } |
+ if (s < 4) |
+ memset (*d + 6 + doff + s, 0, (4 - s)); |
+} |
+ |
+static void |
+exif_data_load_data_thumbnail (ExifData *data, const unsigned char *d, |
+ unsigned int ds, ExifLong o, ExifLong s) |
+{ |
+ /* Sanity checks */ |
+ if ((o + s < o) || (o + s < s) || (o + s > ds) || (o > ds)) { |
+ exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData", |
+ "Bogus thumbnail offset (%u) or size (%u).", |
+ o, s); |
+ return; |
+ } |
+ |
+ if (data->data) |
+ exif_mem_free (data->priv->mem, data->data); |
+ if (!(data->data = exif_data_alloc (data, s))) { |
+ EXIF_LOG_NO_MEMORY (data->priv->log, "ExifData", s); |
+ data->size = 0; |
+ return; |
+ } |
+ data->size = s; |
+ memcpy (data->data, d + o, s); |
+} |
+ |
+#undef CHECK_REC |
+#define CHECK_REC(i) \ |
+if ((i) == ifd) { \ |
+ exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, \ |
+ "ExifData", "Recursive entry in IFD " \ |
+ "'%s' detected. Skipping...", \ |
+ exif_ifd_get_name (i)); \ |
+ break; \ |
+} \ |
+if (data->ifd[(i)]->count) { \ |
+ exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, \ |
+ "ExifData", "Attempt to load IFD " \ |
+ "'%s' multiple times detected. " \ |
+ "Skipping...", \ |
+ exif_ifd_get_name (i)); \ |
+ break; \ |
+} |
+ |
+/*! Load data for an IFD. |
+ * |
+ * \param[in,out] data #ExifData |
+ * \param[in] ifd IFD to load |
+ * \param[in] d pointer to buffer containing raw IFD data |
+ * \param[in] ds size of raw data in buffer at \c d |
+ * \param[in] offset offset into buffer at \c d at which IFD starts |
+ * \param[in] recursion_depth number of times this function has been |
+ * recursively called without returning |
+ */ |
+static void |
+exif_data_load_data_content (ExifData *data, ExifIfd ifd, |
+ const unsigned char *d, |
+ unsigned int ds, unsigned int offset, unsigned int recursion_depth) |
+{ |
+ ExifLong o, thumbnail_offset = 0, thumbnail_length = 0; |
+ ExifShort n; |
+ ExifEntry *entry; |
+ unsigned int i; |
+ ExifTag tag; |
+ |
+ if (!data || !data->priv) |
+ return; |
+ |
+ /* check for valid ExifIfd enum range */ |
+ if ((((int)ifd) < 0) || ( ((int)ifd) >= EXIF_IFD_COUNT)) |
+ return; |
+ |
+ if (recursion_depth > 30) { |
+ exif_log (data->priv->log, EXIF_LOG_CODE_CORRUPT_DATA, "ExifData", |
+ "Deep recursion detected!"); |
+ return; |
+ } |
+ |
+ /* Read the number of entries */ |
+ if ((offset + 2 < offset) || (offset + 2 < 2) || (offset + 2 > ds)) { |
+ exif_log (data->priv->log, EXIF_LOG_CODE_CORRUPT_DATA, "ExifData", |
+ "Tag data past end of buffer (%u > %u)", offset+2, ds); |
+ return; |
+ } |
+ n = exif_get_short (d + offset, data->priv->order); |
+ exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData", |
+ "Loading %hu entries...", n); |
+ offset += 2; |
+ |
+ /* Check if we have enough data. */ |
+ if (offset + 12 * n > ds) { |
+ n = (ds - offset) / 12; |
+ exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData", |
+ "Short data; only loading %hu entries...", n); |
+ } |
+ |
+ for (i = 0; i < n; i++) { |
+ |
+ tag = exif_get_short (d + offset + 12 * i, data->priv->order); |
+ switch (tag) { |
+ case EXIF_TAG_EXIF_IFD_POINTER: |
+ case EXIF_TAG_GPS_INFO_IFD_POINTER: |
+ case EXIF_TAG_INTEROPERABILITY_IFD_POINTER: |
+ case EXIF_TAG_JPEG_INTERCHANGE_FORMAT_LENGTH: |
+ case EXIF_TAG_JPEG_INTERCHANGE_FORMAT: |
+ o = exif_get_long (d + offset + 12 * i + 8, |
+ data->priv->order); |
+ /* FIXME: IFD_POINTER tags aren't marked as being in a |
+ * specific IFD, so exif_tag_get_name_in_ifd won't work |
+ */ |
+ exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData", |
+ "Sub-IFD entry 0x%x ('%s') at %u.", tag, |
+ exif_tag_get_name(tag), o); |
+ switch (tag) { |
+ case EXIF_TAG_EXIF_IFD_POINTER: |
+ CHECK_REC (EXIF_IFD_EXIF); |
+ exif_data_load_data_content (data, EXIF_IFD_EXIF, d, ds, o, recursion_depth + 1); |
+ break; |
+ case EXIF_TAG_GPS_INFO_IFD_POINTER: |
+ CHECK_REC (EXIF_IFD_GPS); |
+ exif_data_load_data_content (data, EXIF_IFD_GPS, d, ds, o, recursion_depth + 1); |
+ break; |
+ case EXIF_TAG_INTEROPERABILITY_IFD_POINTER: |
+ CHECK_REC (EXIF_IFD_INTEROPERABILITY); |
+ exif_data_load_data_content (data, EXIF_IFD_INTEROPERABILITY, d, ds, o, recursion_depth + 1); |
+ break; |
+ case EXIF_TAG_JPEG_INTERCHANGE_FORMAT: |
+ thumbnail_offset = o; |
+ if (thumbnail_offset && thumbnail_length) |
+ exif_data_load_data_thumbnail (data, d, |
+ ds, thumbnail_offset, |
+ thumbnail_length); |
+ break; |
+ case EXIF_TAG_JPEG_INTERCHANGE_FORMAT_LENGTH: |
+ thumbnail_length = o; |
+ if (thumbnail_offset && thumbnail_length) |
+ exif_data_load_data_thumbnail (data, d, |
+ ds, thumbnail_offset, |
+ thumbnail_length); |
+ break; |
+ default: |
+ return; |
+ } |
+ break; |
+ default: |
+ |
+ /* |
+ * If we don't know the tag, don't fail. It could be that new |
+ * versions of the standard have defined additional tags. Note that |
+ * 0 is a valid tag in the GPS IFD. |
+ */ |
+ if (!exif_tag_get_name_in_ifd (tag, ifd)) { |
+ |
+ /* |
+ * Special case: Tag and format 0. That's against specification |
+ * (at least up to 2.2). But Photoshop writes it anyways. |
+ */ |
+ if (!memcmp (d + offset + 12 * i, "\0\0\0\0", 4)) { |
+ exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData", |
+ "Skipping empty entry at position %u in '%s'.", i, |
+ exif_ifd_get_name (ifd)); |
+ break; |
+ } |
+ exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData", |
+ "Unknown tag 0x%04x (entry %u in '%s'). Please report this tag " |
+ "to <libexif-devel@lists.sourceforge.net>.", tag, i, |
+ exif_ifd_get_name (ifd)); |
+ if (data->priv->options & EXIF_DATA_OPTION_IGNORE_UNKNOWN_TAGS) |
+ break; |
+ } |
+ entry = exif_entry_new_mem (data->priv->mem); |
+ if (exif_data_load_data_entry (data, entry, d, ds, |
+ offset + 12 * i)) |
+ exif_content_add_entry (data->ifd[ifd], entry); |
+ exif_entry_unref (entry); |
+ break; |
+ } |
+ } |
+} |
+ |
+static int |
+cmp_func (const unsigned char *p1, const unsigned char *p2, ExifByteOrder o) |
+{ |
+ ExifShort tag1 = exif_get_short (p1, o); |
+ ExifShort tag2 = exif_get_short (p2, o); |
+ |
+ return (tag1 < tag2) ? -1 : (tag1 > tag2) ? 1 : 0; |
+} |
+ |
+static int |
+cmp_func_intel (const void *elem1, const void *elem2) |
+{ |
+ return cmp_func ((const unsigned char *) elem1, |
+ (const unsigned char *) elem2, EXIF_BYTE_ORDER_INTEL); |
+} |
+ |
+static int |
+cmp_func_motorola (const void *elem1, const void *elem2) |
+{ |
+ return cmp_func ((const unsigned char *) elem1, |
+ (const unsigned char *) elem2, EXIF_BYTE_ORDER_MOTOROLA); |
+} |
+ |
+static void |
+exif_data_save_data_content (ExifData *data, ExifContent *ifd, |
+ unsigned char **d, unsigned int *ds, |
+ unsigned int offset) |
+{ |
+ unsigned int j, n_ptr = 0, n_thumb = 0; |
+ ExifIfd i; |
+ unsigned char *t; |
+ unsigned int ts; |
+ |
+ if (!data || !data->priv || !ifd || !d || !ds) |
+ return; |
+ |
+ for (i = 0; i < EXIF_IFD_COUNT; i++) |
+ if (ifd == data->ifd[i]) |
+ break; |
+ if (i == EXIF_IFD_COUNT) |
+ return; /* error */ |
+ |
+ /* |
+ * Check if we need some extra entries for pointers or the thumbnail. |
+ */ |
+ switch (i) { |
+ case EXIF_IFD_0: |
+ |
+ /* |
+ * The pointer to IFD_EXIF is in IFD_0. The pointer to |
+ * IFD_INTEROPERABILITY is in IFD_EXIF. |
+ */ |
+ if (data->ifd[EXIF_IFD_EXIF]->count || |
+ data->ifd[EXIF_IFD_INTEROPERABILITY]->count) |
+ n_ptr++; |
+ |
+ /* The pointer to IFD_GPS is in IFD_0. */ |
+ if (data->ifd[EXIF_IFD_GPS]->count) |
+ n_ptr++; |
+ |
+ break; |
+ case EXIF_IFD_1: |
+ if (data->size) |
+ n_thumb = 2; |
+ break; |
+ case EXIF_IFD_EXIF: |
+ if (data->ifd[EXIF_IFD_INTEROPERABILITY]->count) |
+ n_ptr++; |
+ default: |
+ break; |
+ } |
+ |
+ /* |
+ * Allocate enough memory for all entries |
+ * and the number of entries. |
+ */ |
+ ts = *ds + (2 + (ifd->count + n_ptr + n_thumb) * 12 + 4); |
+ t = exif_mem_realloc (data->priv->mem, *d, ts); |
+ if (!t) { |
+ EXIF_LOG_NO_MEMORY (data->priv->log, "ExifData", ts); |
+ return; |
+ } |
+ *d = t; |
+ *ds = ts; |
+ |
+ /* Save the number of entries */ |
+ exif_set_short (*d + 6 + offset, data->priv->order, |
+ (ExifShort) (ifd->count + n_ptr + n_thumb)); |
+ offset += 2; |
+ |
+ /* |
+ * Save each entry. Make sure that no memcpys from NULL pointers are |
+ * performed |
+ */ |
+ exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData", |
+ "Saving %i entries (IFD '%s', offset: %i)...", |
+ ifd->count, exif_ifd_get_name (i), offset); |
+ for (j = 0; j < ifd->count; j++) { |
+ if (ifd->entries[j]) { |
+ exif_data_save_data_entry (data, ifd->entries[j], d, ds, |
+ offset + 12 * j); |
+ } |
+ } |
+ |
+ offset += 12 * ifd->count; |
+ |
+ /* Now save special entries. */ |
+ switch (i) { |
+ case EXIF_IFD_0: |
+ |
+ /* |
+ * The pointer to IFD_EXIF is in IFD_0. |
+ * However, the pointer to IFD_INTEROPERABILITY is in IFD_EXIF, |
+ * therefore, if IFD_INTEROPERABILITY is not empty, we need |
+ * IFD_EXIF even if latter is empty. |
+ */ |
+ if (data->ifd[EXIF_IFD_EXIF]->count || |
+ data->ifd[EXIF_IFD_INTEROPERABILITY]->count) { |
+ exif_set_short (*d + 6 + offset + 0, data->priv->order, |
+ EXIF_TAG_EXIF_IFD_POINTER); |
+ exif_set_short (*d + 6 + offset + 2, data->priv->order, |
+ EXIF_FORMAT_LONG); |
+ exif_set_long (*d + 6 + offset + 4, data->priv->order, |
+ 1); |
+ exif_set_long (*d + 6 + offset + 8, data->priv->order, |
+ *ds - 6); |
+ exif_data_save_data_content (data, |
+ data->ifd[EXIF_IFD_EXIF], d, ds, *ds - 6); |
+ offset += 12; |
+ } |
+ |
+ /* The pointer to IFD_GPS is in IFD_0, too. */ |
+ if (data->ifd[EXIF_IFD_GPS]->count) { |
+ exif_set_short (*d + 6 + offset + 0, data->priv->order, |
+ EXIF_TAG_GPS_INFO_IFD_POINTER); |
+ exif_set_short (*d + 6 + offset + 2, data->priv->order, |
+ EXIF_FORMAT_LONG); |
+ exif_set_long (*d + 6 + offset + 4, data->priv->order, |
+ 1); |
+ exif_set_long (*d + 6 + offset + 8, data->priv->order, |
+ *ds - 6); |
+ exif_data_save_data_content (data, |
+ data->ifd[EXIF_IFD_GPS], d, ds, *ds - 6); |
+ offset += 12; |
+ } |
+ |
+ break; |
+ case EXIF_IFD_EXIF: |
+ |
+ /* |
+ * The pointer to IFD_INTEROPERABILITY is in IFD_EXIF. |
+ * See note above. |
+ */ |
+ if (data->ifd[EXIF_IFD_INTEROPERABILITY]->count) { |
+ exif_set_short (*d + 6 + offset + 0, data->priv->order, |
+ EXIF_TAG_INTEROPERABILITY_IFD_POINTER); |
+ exif_set_short (*d + 6 + offset + 2, data->priv->order, |
+ EXIF_FORMAT_LONG); |
+ exif_set_long (*d + 6 + offset + 4, data->priv->order, |
+ 1); |
+ exif_set_long (*d + 6 + offset + 8, data->priv->order, |
+ *ds - 6); |
+ exif_data_save_data_content (data, |
+ data->ifd[EXIF_IFD_INTEROPERABILITY], d, ds, |
+ *ds - 6); |
+ offset += 12; |
+ } |
+ |
+ break; |
+ case EXIF_IFD_1: |
+ |
+ /* |
+ * Information about the thumbnail (if any) is saved in |
+ * IFD_1. |
+ */ |
+ if (data->size) { |
+ |
+ /* EXIF_TAG_JPEG_INTERCHANGE_FORMAT */ |
+ exif_set_short (*d + 6 + offset + 0, data->priv->order, |
+ EXIF_TAG_JPEG_INTERCHANGE_FORMAT); |
+ exif_set_short (*d + 6 + offset + 2, data->priv->order, |
+ EXIF_FORMAT_LONG); |
+ exif_set_long (*d + 6 + offset + 4, data->priv->order, |
+ 1); |
+ exif_set_long (*d + 6 + offset + 8, data->priv->order, |
+ *ds - 6); |
+ ts = *ds + data->size; |
+ t = exif_mem_realloc (data->priv->mem, *d, ts); |
+ if (!t) { |
+ EXIF_LOG_NO_MEMORY (data->priv->log, "ExifData", |
+ ts); |
+ return; |
+ } |
+ *d = t; |
+ *ds = ts; |
+ memcpy (*d + *ds - data->size, data->data, data->size); |
+ offset += 12; |
+ |
+ /* EXIF_TAG_JPEG_INTERCHANGE_FORMAT_LENGTH */ |
+ exif_set_short (*d + 6 + offset + 0, data->priv->order, |
+ EXIF_TAG_JPEG_INTERCHANGE_FORMAT_LENGTH); |
+ exif_set_short (*d + 6 + offset + 2, data->priv->order, |
+ EXIF_FORMAT_LONG); |
+ exif_set_long (*d + 6 + offset + 4, data->priv->order, |
+ 1); |
+ exif_set_long (*d + 6 + offset + 8, data->priv->order, |
+ data->size); |
+ offset += 12; |
+ } |
+ |
+ break; |
+ default: |
+ break; |
+ } |
+ |
+ /* Sort the directory according to TIFF specification */ |
+ qsort (*d + 6 + offset - (ifd->count + n_ptr + n_thumb) * 12, |
+ (ifd->count + n_ptr + n_thumb), 12, |
+ (data->priv->order == EXIF_BYTE_ORDER_INTEL) ? cmp_func_intel : cmp_func_motorola); |
+ |
+ /* Correctly terminate the directory */ |
+ if (i == EXIF_IFD_0 && (data->ifd[EXIF_IFD_1]->count || |
+ data->size)) { |
+ |
+ /* |
+ * We are saving IFD 0. Tell where IFD 1 starts and save |
+ * IFD 1. |
+ */ |
+ exif_set_long (*d + 6 + offset, data->priv->order, *ds - 6); |
+ exif_data_save_data_content (data, data->ifd[EXIF_IFD_1], d, ds, |
+ *ds - 6); |
+ } else |
+ exif_set_long (*d + 6 + offset, data->priv->order, 0); |
+} |
+ |
+typedef enum { |
+ EXIF_DATA_TYPE_MAKER_NOTE_NONE = 0, |
+ EXIF_DATA_TYPE_MAKER_NOTE_CANON = 1, |
+ EXIF_DATA_TYPE_MAKER_NOTE_OLYMPUS = 2, |
+ EXIF_DATA_TYPE_MAKER_NOTE_PENTAX = 3, |
+ EXIF_DATA_TYPE_MAKER_NOTE_NIKON = 4, |
+ EXIF_DATA_TYPE_MAKER_NOTE_CASIO = 5, |
+ EXIF_DATA_TYPE_MAKER_NOTE_FUJI = 6 |
+} ExifDataTypeMakerNote; |
+ |
+/*! If MakerNote is recognized, load it. |
+ * |
+ * \param[in,out] data #ExifData |
+ * \param[in] d pointer to raw EXIF data |
+ * \param[in] ds length of data at d |
+ */ |
+static void |
+interpret_maker_note(ExifData *data, const unsigned char *d, unsigned int ds) |
+{ |
+ int mnoteid; |
+ ExifEntry* e = exif_data_get_entry (data, EXIF_TAG_MAKER_NOTE); |
+ if (!e) |
+ return; |
+ |
+ if ((mnoteid = exif_mnote_data_olympus_identify (data, e)) != 0) { |
+ exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, |
+ "ExifData", "Olympus MakerNote variant type %d", mnoteid); |
+ data->priv->md = exif_mnote_data_olympus_new (data->priv->mem); |
+ |
+ } else if ((mnoteid = exif_mnote_data_canon_identify (data, e)) != 0) { |
+ exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, |
+ "ExifData", "Canon MakerNote variant type %d", mnoteid); |
+ data->priv->md = exif_mnote_data_canon_new (data->priv->mem, data->priv->options); |
+ |
+ } else if ((mnoteid = exif_mnote_data_fuji_identify (data, e)) != 0) { |
+ exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, |
+ "ExifData", "Fuji MakerNote variant type %d", mnoteid); |
+ data->priv->md = exif_mnote_data_fuji_new (data->priv->mem); |
+ |
+ /* NOTE: Must do Pentax detection last because some of the |
+ * heuristics are pretty general. */ |
+ } else if ((mnoteid = exif_mnote_data_pentax_identify (data, e)) != 0) { |
+ exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, |
+ "ExifData", "Pentax MakerNote variant type %d", mnoteid); |
+ data->priv->md = exif_mnote_data_pentax_new (data->priv->mem); |
+ } |
+ |
+ /* |
+ * If we are able to interpret the maker note, do so. |
+ */ |
+ if (data->priv->md) { |
+ exif_mnote_data_log (data->priv->md, data->priv->log); |
+ exif_mnote_data_set_byte_order (data->priv->md, |
+ data->priv->order); |
+ exif_mnote_data_set_offset (data->priv->md, |
+ data->priv->offset_mnote); |
+ exif_mnote_data_load (data->priv->md, d, ds); |
+ } |
+} |
+ |
+#define LOG_TOO_SMALL \ |
+exif_log (data->priv->log, EXIF_LOG_CODE_CORRUPT_DATA, "ExifData", \ |
+ _("Size of data too small to allow for EXIF data.")); |
+ |
+void |
+exif_data_load_data (ExifData *data, const unsigned char *d_orig, |
+ unsigned int ds_orig) |
+{ |
+ unsigned int l; |
+ ExifLong offset; |
+ ExifShort n; |
+ const unsigned char *d = d_orig; |
+ unsigned int ds = ds_orig, len; |
+ |
+ if (!data || !data->priv || !d || !ds) |
+ return; |
+ |
+ exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData", |
+ "Parsing %i byte(s) EXIF data...\n", ds); |
+ |
+ /* |
+ * It can be that the data starts with the EXIF header. If it does |
+ * not, search the EXIF marker. |
+ */ |
+ if (ds < 6) { |
+ LOG_TOO_SMALL; |
+ return; |
+ } |
+ if (!memcmp (d, ExifHeader, 6)) { |
+ exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData", |
+ "Found EXIF header."); |
+ } else { |
+ while (1) { |
+ while ((d[0] == 0xff) && ds) { |
+ d++; |
+ ds--; |
+ } |
+ |
+ /* JPEG_MARKER_SOI */ |
+ if (d[0] == JPEG_MARKER_SOI) { |
+ d++; |
+ ds--; |
+ continue; |
+ } |
+ |
+ /* JPEG_MARKER_APP0 */ |
+ if (d[0] == JPEG_MARKER_APP0) { |
+ d++; |
+ ds--; |
+ l = (d[0] << 8) | d[1]; |
+ if (l > ds) |
+ return; |
+ d += l; |
+ ds -= l; |
+ continue; |
+ } |
+ |
+ /* JPEG_MARKER_APP1 */ |
+ if (d[0] == JPEG_MARKER_APP1) |
+ break; |
+ |
+ /* Unknown marker or data. Give up. */ |
+ exif_log (data->priv->log, EXIF_LOG_CODE_CORRUPT_DATA, |
+ "ExifData", _("EXIF marker not found.")); |
+ return; |
+ } |
+ d++; |
+ ds--; |
+ if (ds < 2) { |
+ LOG_TOO_SMALL; |
+ return; |
+ } |
+ len = (d[0] << 8) | d[1]; |
+ exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData", |
+ "We have to deal with %i byte(s) of EXIF data.", |
+ len); |
+ d += 2; |
+ ds -= 2; |
+ } |
+ |
+ /* |
+ * Verify the exif header |
+ * (offset 2, length 6). |
+ */ |
+ if (ds < 6) { |
+ LOG_TOO_SMALL; |
+ return; |
+ } |
+ if (memcmp (d, ExifHeader, 6)) { |
+ exif_log (data->priv->log, EXIF_LOG_CODE_CORRUPT_DATA, |
+ "ExifData", _("EXIF header not found.")); |
+ return; |
+ } |
+ |
+ exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData", |
+ "Found EXIF header."); |
+ |
+ /* Byte order (offset 6, length 2) */ |
+ if (ds < 14) |
+ return; |
+ if (!memcmp (d + 6, "II", 2)) |
+ data->priv->order = EXIF_BYTE_ORDER_INTEL; |
+ else if (!memcmp (d + 6, "MM", 2)) |
+ data->priv->order = EXIF_BYTE_ORDER_MOTOROLA; |
+ else { |
+ exif_log (data->priv->log, EXIF_LOG_CODE_CORRUPT_DATA, |
+ "ExifData", _("Unknown encoding.")); |
+ return; |
+ } |
+ |
+ /* Fixed value */ |
+ if (exif_get_short (d + 8, data->priv->order) != 0x002a) |
+ return; |
+ |
+ /* IFD 0 offset */ |
+ offset = exif_get_long (d + 10, data->priv->order); |
+ exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData", |
+ "IFD 0 at %i.", (int) offset); |
+ |
+ /* Parse the actual exif data (usually offset 14 from start) */ |
+ exif_data_load_data_content (data, EXIF_IFD_0, d + 6, ds - 6, offset, 0); |
+ |
+ /* IFD 1 offset */ |
+ if (offset + 6 + 2 > ds) { |
+ return; |
+ } |
+ n = exif_get_short (d + 6 + offset, data->priv->order); |
+ if (offset + 6 + 2 + 12 * n + 4 > ds) { |
+ return; |
+ } |
+ offset = exif_get_long (d + 6 + offset + 2 + 12 * n, data->priv->order); |
+ if (offset) { |
+ exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData", |
+ "IFD 1 at %i.", (int) offset); |
+ |
+ /* Sanity check. */ |
+ if (offset > ds - 6) { |
+ exif_log (data->priv->log, EXIF_LOG_CODE_CORRUPT_DATA, |
+ "ExifData", "Bogus offset of IFD1."); |
+ } else { |
+ exif_data_load_data_content (data, EXIF_IFD_1, d + 6, ds - 6, offset, 0); |
+ } |
+ } |
+ |
+ /* |
+ * If we got an EXIF_TAG_MAKER_NOTE, try to interpret it. Some |
+ * cameras use pointers in the maker note tag that point to the |
+ * space between IFDs. Here is the only place where we have access |
+ * to that data. |
+ */ |
+ interpret_maker_note(data, d, ds); |
+ |
+ /* Fixup tags if requested */ |
+ if (data->priv->options & EXIF_DATA_OPTION_FOLLOW_SPECIFICATION) |
+ exif_data_fix (data); |
+} |
+ |
+void |
+exif_data_save_data (ExifData *data, unsigned char **d, unsigned int *ds) |
+{ |
+ if (ds) |
+ *ds = 0; /* This means something went wrong */ |
+ |
+ if (!data || !d || !ds) |
+ return; |
+ |
+ /* Header */ |
+ *ds = 14; |
+ *d = exif_data_alloc (data, *ds); |
+ if (!*d) { |
+ *ds = 0; |
+ return; |
+ } |
+ memcpy (*d, ExifHeader, 6); |
+ |
+ /* Order (offset 6) */ |
+ if (data->priv->order == EXIF_BYTE_ORDER_INTEL) { |
+ memcpy (*d + 6, "II", 2); |
+ } else { |
+ memcpy (*d + 6, "MM", 2); |
+ } |
+ |
+ /* Fixed value (2 bytes, offset 8) */ |
+ exif_set_short (*d + 8, data->priv->order, 0x002a); |
+ |
+ /* |
+ * IFD 0 offset (4 bytes, offset 10). |
+ * We will start 8 bytes after the |
+ * EXIF header (2 bytes for order, another 2 for the test, and |
+ * 4 bytes for the IFD 0 offset make 8 bytes together). |
+ */ |
+ exif_set_long (*d + 10, data->priv->order, 8); |
+ |
+ /* Now save IFD 0. IFD 1 will be saved automatically. */ |
+ exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData", |
+ "Saving IFDs..."); |
+ exif_data_save_data_content (data, data->ifd[EXIF_IFD_0], d, ds, |
+ *ds - 6); |
+ exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData", |
+ "Saved %i byte(s) EXIF data.", *ds); |
+} |
+ |
+ExifData * |
+exif_data_new_from_file (const char *path) |
+{ |
+ ExifData *edata; |
+ ExifLoader *loader; |
+ |
+ loader = exif_loader_new (); |
+ exif_loader_write_file (loader, path); |
+ edata = exif_loader_get_data (loader); |
+ exif_loader_unref (loader); |
+ |
+ return (edata); |
+} |
+ |
+void |
+exif_data_ref (ExifData *data) |
+{ |
+ if (!data) |
+ return; |
+ |
+ data->priv->ref_count++; |
+} |
+ |
+void |
+exif_data_unref (ExifData *data) |
+{ |
+ if (!data) |
+ return; |
+ |
+ data->priv->ref_count--; |
+ if (!data->priv->ref_count) |
+ exif_data_free (data); |
+} |
+ |
+void |
+exif_data_free (ExifData *data) |
+{ |
+ unsigned int i; |
+ ExifMem *mem = (data && data->priv) ? data->priv->mem : NULL; |
+ |
+ if (!data) |
+ return; |
+ |
+ for (i = 0; i < EXIF_IFD_COUNT; i++) { |
+ if (data->ifd[i]) { |
+ exif_content_unref (data->ifd[i]); |
+ data->ifd[i] = NULL; |
+ } |
+ } |
+ |
+ if (data->data) { |
+ exif_mem_free (mem, data->data); |
+ data->data = NULL; |
+ } |
+ |
+ if (data->priv) { |
+ if (data->priv->log) { |
+ exif_log_unref (data->priv->log); |
+ data->priv->log = NULL; |
+ } |
+ if (data->priv->md) { |
+ exif_mnote_data_unref (data->priv->md); |
+ data->priv->md = NULL; |
+ } |
+ exif_mem_free (mem, data->priv); |
+ exif_mem_free (mem, data); |
+ } |
+ |
+ exif_mem_unref (mem); |
+} |
+ |
+void |
+exif_data_dump (ExifData *data) |
+{ |
+ unsigned int i; |
+ |
+ if (!data) |
+ return; |
+ |
+ for (i = 0; i < EXIF_IFD_COUNT; i++) { |
+ if (data->ifd[i] && data->ifd[i]->count) { |
+ printf ("Dumping IFD '%s'...\n", |
+ exif_ifd_get_name (i)); |
+ exif_content_dump (data->ifd[i], 0); |
+ } |
+ } |
+ |
+ if (data->data) { |
+ printf ("%i byte(s) thumbnail data available.", data->size); |
+ if (data->size >= 4) { |
+ printf ("0x%02x 0x%02x ... 0x%02x 0x%02x\n", |
+ data->data[0], data->data[1], |
+ data->data[data->size - 2], |
+ data->data[data->size - 1]); |
+ } |
+ } |
+} |
+ |
+ExifByteOrder |
+exif_data_get_byte_order (ExifData *data) |
+{ |
+ if (!data) |
+ return (0); |
+ |
+ return (data->priv->order); |
+} |
+ |
+void |
+exif_data_foreach_content (ExifData *data, ExifDataForeachContentFunc func, |
+ void *user_data) |
+{ |
+ unsigned int i; |
+ |
+ if (!data || !func) |
+ return; |
+ |
+ for (i = 0; i < EXIF_IFD_COUNT; i++) |
+ func (data->ifd[i], user_data); |
+} |
+ |
+typedef struct _ByteOrderChangeData ByteOrderChangeData; |
+struct _ByteOrderChangeData { |
+ ExifByteOrder old, new; |
+}; |
+ |
+static void |
+entry_set_byte_order (ExifEntry *e, void *data) |
+{ |
+ ByteOrderChangeData *d = data; |
+ |
+ if (!e) |
+ return; |
+ |
+ exif_array_set_byte_order (e->format, e->data, e->components, d->old, d->new); |
+} |
+ |
+static void |
+content_set_byte_order (ExifContent *content, void *data) |
+{ |
+ exif_content_foreach_entry (content, entry_set_byte_order, data); |
+} |
+ |
+void |
+exif_data_set_byte_order (ExifData *data, ExifByteOrder order) |
+{ |
+ ByteOrderChangeData d; |
+ |
+ if (!data || (order == data->priv->order)) |
+ return; |
+ |
+ d.old = data->priv->order; |
+ d.new = order; |
+ exif_data_foreach_content (data, content_set_byte_order, &d); |
+ data->priv->order = order; |
+ if (data->priv->md) |
+ exif_mnote_data_set_byte_order (data->priv->md, order); |
+} |
+ |
+void |
+exif_data_log (ExifData *data, ExifLog *log) |
+{ |
+ unsigned int i; |
+ |
+ if (!data || !data->priv) |
+ return; |
+ exif_log_unref (data->priv->log); |
+ data->priv->log = log; |
+ exif_log_ref (log); |
+ |
+ for (i = 0; i < EXIF_IFD_COUNT; i++) |
+ exif_content_log (data->ifd[i], log); |
+} |
+ |
+/* Used internally within libexif */ |
+ExifLog *exif_data_get_log (ExifData *); |
+ExifLog * |
+exif_data_get_log (ExifData *data) |
+{ |
+ if (!data || !data->priv) |
+ return NULL; |
+ return data->priv->log; |
+} |
+ |
+static const struct { |
+ ExifDataOption option; |
+ const char *name; |
+ const char *description; |
+} exif_data_option[] = { |
+ {EXIF_DATA_OPTION_IGNORE_UNKNOWN_TAGS, N_("Ignore unknown tags"), |
+ N_("Ignore unknown tags when loading EXIF data.")}, |
+ {EXIF_DATA_OPTION_FOLLOW_SPECIFICATION, N_("Follow specification"), |
+ N_("Add, correct and remove entries to get EXIF data that follows " |
+ "the specification.")}, |
+ {EXIF_DATA_OPTION_DONT_CHANGE_MAKER_NOTE, N_("Do not change maker note"), |
+ N_("When loading and resaving Exif data, save the maker note unmodified." |
+ " Be aware that the maker note can get corrupted.")}, |
+ {0, NULL, NULL} |
+}; |
+ |
+const char * |
+exif_data_option_get_name (ExifDataOption o) |
+{ |
+ unsigned int i; |
+ |
+ for (i = 0; exif_data_option[i].name; i++) |
+ if (exif_data_option[i].option == o) |
+ break; |
+ return _(exif_data_option[i].name); |
+} |
+ |
+const char * |
+exif_data_option_get_description (ExifDataOption o) |
+{ |
+ unsigned int i; |
+ |
+ for (i = 0; exif_data_option[i].description; i++) |
+ if (exif_data_option[i].option == o) |
+ break; |
+ return _(exif_data_option[i].description); |
+} |
+ |
+void |
+exif_data_set_option (ExifData *d, ExifDataOption o) |
+{ |
+ if (!d) |
+ return; |
+ |
+ d->priv->options |= o; |
+} |
+ |
+void |
+exif_data_unset_option (ExifData *d, ExifDataOption o) |
+{ |
+ if (!d) |
+ return; |
+ |
+ d->priv->options &= ~o; |
+} |
+ |
+static void |
+fix_func (ExifContent *c, void *UNUSED(data)) |
+{ |
+ switch (exif_content_get_ifd (c)) { |
+ case EXIF_IFD_1: |
+ if (c->parent->data) |
+ exif_content_fix (c); |
+ else if (c->count) { |
+ exif_log (c->parent->priv->log, EXIF_LOG_CODE_DEBUG, "exif-data", |
+ "No thumbnail but entries on thumbnail. These entries have been " |
+ "removed."); |
+ while (c->count) { |
+ unsigned int cnt = c->count; |
+ exif_content_remove_entry (c, c->entries[c->count - 1]); |
+ if (cnt == c->count) { |
+ /* safety net */ |
+ exif_log (c->parent->priv->log, EXIF_LOG_CODE_DEBUG, "exif-data", |
+ "failed to remove last entry from entries."); |
+ c->count--; |
+ } |
+ } |
+ } |
+ break; |
+ default: |
+ exif_content_fix (c); |
+ } |
+} |
+ |
+void |
+exif_data_fix (ExifData *d) |
+{ |
+ exif_data_foreach_content (d, fix_func, NULL); |
+} |
+ |
+void |
+exif_data_set_data_type (ExifData *d, ExifDataType dt) |
+{ |
+ if (!d || !d->priv) |
+ return; |
+ |
+ d->priv->data_type = dt; |
+} |
+ |
+ExifDataType |
+exif_data_get_data_type (ExifData *d) |
+{ |
+ return (d && d->priv) ? d->priv->data_type : EXIF_DATA_TYPE_UNKNOWN; |
+} |
Property changes on: libexif/sources/libexif/exif-data.c |
___________________________________________________________________ |
Added: svn:eol-style |
+ LF |