EXIF library (libexif) API  0.6.21
exif-data.h
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1 
4 /*
5  * \author Lutz Mueller <lutz@users.sourceforge.net>
6  * \date 2001-2005
7  *
8  * This library is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2 of the License, or (at your option) any later version.
12  *
13  * This library is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with this library; if not, write to the
20  * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21  * Boston, MA 02110-1301 USA.
22  */
23 
24 #ifndef __EXIF_DATA_H__
25 #define __EXIF_DATA_H__
26 
27 #ifdef __cplusplus
28 extern "C" {
29 #endif /* __cplusplus */
30 
32 #include <libexif/exif-data-type.h>
33 #include <libexif/exif-ifd.h>
34 #include <libexif/exif-log.h>
35 #include <libexif/exif-tag.h>
36 
38 typedef struct _ExifData ExifData;
39 typedef struct _ExifDataPrivate ExifDataPrivate;
40 
41 #include <libexif/exif-content.h>
43 #include <libexif/exif-mem.h>
44 
46 struct _ExifData
47 {
49  ExifContent *ifd[EXIF_IFD_COUNT];
50 
52  unsigned char *data;
53 
55  unsigned int size;
56 
57  ExifDataPrivate *priv;
58 };
59 
67 ExifData *exif_data_new (void);
68 
77 
84 ExifData *exif_data_new_from_file (const char *path);
85 
92 ExifData *exif_data_new_from_data (const unsigned char *data,
93  unsigned int size);
94 
106 void exif_data_load_data (ExifData *data, const unsigned char *d,
107  unsigned int size);
108 
119 void exif_data_save_data (ExifData *data, unsigned char **d,
120  unsigned int *ds);
121 
122 void exif_data_ref (ExifData *data);
123 void exif_data_unref (ExifData *data);
124 void exif_data_free (ExifData *data);
125 
132 
141 
151 
159 void exif_data_fix (ExifData *d);
160 
161 typedef void (* ExifDataForeachContentFunc) (ExifContent *, void *user_data);
162 
170  ExifDataForeachContentFunc func,
171  void *user_data);
172 
174 typedef enum {
177 
180 
184 
191 
198 
205 
212 
218 void exif_data_set_data_type (ExifData *d, ExifDataType dt);
219 
225 ExifDataType exif_data_get_data_type (ExifData *d);
226 
233 
239 void exif_data_log (ExifData *data, ExifLog *log);
240 
249 #define exif_data_get_entry(d,t) \
250  (exif_content_get_entry(d->ifd[EXIF_IFD_0],t) ? \
251  exif_content_get_entry(d->ifd[EXIF_IFD_0],t) : \
252  exif_content_get_entry(d->ifd[EXIF_IFD_1],t) ? \
253  exif_content_get_entry(d->ifd[EXIF_IFD_1],t) : \
254  exif_content_get_entry(d->ifd[EXIF_IFD_EXIF],t) ? \
255  exif_content_get_entry(d->ifd[EXIF_IFD_EXIF],t) : \
256  exif_content_get_entry(d->ifd[EXIF_IFD_GPS],t) ? \
257  exif_content_get_entry(d->ifd[EXIF_IFD_GPS],t) : \
258  exif_content_get_entry(d->ifd[EXIF_IFD_INTEROPERABILITY],t) ? \
259  exif_content_get_entry(d->ifd[EXIF_IFD_INTEROPERABILITY],t) : NULL)
260 
261 #ifdef __cplusplus
262 }
263 #endif /* __cplusplus */
264 
265 #endif /* __EXIF_DATA_H__ */
Act as though unknown tags are not present.
Definition: exif-data.h:176
void exif_data_log(ExifData *data, ExifLog *log)
Set the log message object for all IFDs.
Definition: exif-data.c:1149
ExifData * exif_data_new(void)
Allocate a new ExifData.
Definition: exif-data.c:92
void exif_data_fix(ExifData *d)
Fix the EXIF data to bring it into specification.
Definition: exif-data.c:1258
ExifByteOrder
Which byte order to use.
Definition: exif-byte-order.h:31
Definition: exif-content.h:40
Fix the EXIF tags to follow the spec.
Definition: exif-data.h:179
ExifData * exif_data_new_mem(ExifMem *)
Allocate a new ExifData using the given memory allocator.
Definition: exif-data.c:103
void exif_data_load_data(ExifData *data, const unsigned char *d, unsigned int size)
Load the ExifData structure from the raw JPEG or EXIF data in the given memory buffer.
Definition: exif-data.c:783
ExifByteOrder exif_data_get_byte_order(ExifData *data)
Return the byte order in use by this EXIF structure.
Definition: exif-data.c:1089
void exif_data_unset_option(ExifData *d, ExifDataOption o)
Clear the given option on the given ExifData.
Definition: exif-data.c:1221
struct _ExifMem ExifMem
ExifMem define a memory allocator.
Definition: exif-mem.h:57
unsigned char * data
Pointer to thumbnail image, or NULL if not available.
Definition: exif-data.h:52
void exif_data_foreach_content(ExifData *data, ExifDataForeachContentFunc func, void *user_data)
Execute a function on each IFD in turn.
Definition: exif-data.c:1098
Log message infrastructure.
Handling EXIF MakerNote tags.
Definition: exif-mnote-data-priv.h:60
ExifDataType exif_data_get_data_type(ExifData *d)
Return the data type for the given ExifData.
Definition: exif-data.c:1273
ExifData * exif_data_new_from_file(const char *path)
Allocate a new ExifData and load EXIF data from a JPEG file.
Definition: exif-data.c:991
Handling EXIF tags.
Leave the MakerNote alone, which could cause it to be corrupted.
Definition: exif-data.h:182
void exif_data_save_data(ExifData *data, unsigned char **d, unsigned int *ds)
Store raw EXIF data representing the ExifData structure into a memory buffer.
Definition: exif-data.c:946
void exif_data_set_byte_order(ExifData *data, ExifByteOrder order)
Set the byte order to use for this EXIF data.
Definition: exif-data.c:1133
ExifDataOption
Options to configure the behaviour of ExifData.
Definition: exif-data.h:174
Define the ExifMem data type and the associated functions.
ExifContent * ifd[EXIF_IFD_COUNT]
Data for each IFD.
Definition: exif-data.h:49
ExifData * exif_data_new_from_data(const unsigned char *data, unsigned int size)
Allocate a new ExifData and load EXIF data from a memory buffer.
Definition: exif-data.c:150
const char * exif_data_option_get_description(ExifDataOption o)
Return a verbose textual description of the given ExifDataOption.
Definition: exif-data.c:1201
void exif_data_set_data_type(ExifData *d, ExifDataType dt)
Set the data type for the given ExifData.
Definition: exif-data.c:1264
ExifMnoteData * exif_data_get_mnote_data(ExifData *d)
Return the MakerNote data out of the EXIF data.
Definition: exif-data.c:86
Represents the entire EXIF data found in an image.
Definition: exif-data.h:46
Handling EXIF IFDs.
void exif_data_dump(ExifData *data)
Dump all EXIF data to stdout.
Definition: exif-data.c:1062
unsigned int size
Number of bytes in thumbnail image at data.
Definition: exif-data.h:55
const char * exif_data_option_get_name(ExifDataOption o)
Return a short textual description of the given ExifDataOption.
Definition: exif-data.c:1190
Defines the ExifByteOrder enum and the associated functions.
struct _ExifLog ExifLog
State maintained by the logging interface.
Definition: exif-log.h:34
void exif_data_set_option(ExifData *d, ExifDataOption o)
Set the given option on the given ExifData.
Definition: exif-data.c:1212