1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
|
/* exif.c
Copyright (C) 2012 Dennis Real.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to
deal in the Software without restriction, including without limitation the
rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
sell copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies of the Software and its documentation and acknowledgment shall be
given in the documentation and software packages that this Software was
used.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifdef HAVE_LIBEXIF
#include <stdio.h>
#include <string.h>
#include <libexif/exif-data.h>
#include "feh.h"
#include "options.h"
#include "debug.h"
#include "exif.h"
/* remove all spaces on the right end of a string */
static void exif_trim_spaces(char *str)
{
char *end;
for (end = str; *str!='\0'; str++)
{
if (*str != ' ')
{
end = str;
}
}
*++end = '\0';
}
/* show given exif tag content */
static void exif_get_tag(ExifData *d, ExifIfd ifd, ExifTag tag, char* buffer, unsigned int maxsize)
{
char s[MAX_EXIF_DATA];
if ( (d != NULL) && (buffer != NULL) && (maxsize>0) )
{
ExifEntry *entry = exif_content_get_entry(d->ifd[ifd], tag);
if (entry != NULL)
{
/* Get the contents of the tag in human-readable form */
exif_entry_get_value(entry, s, maxsize);
/* Don't bother printing it if it's entirely blank */
exif_trim_spaces(s);
if (*s != '\0')
{
D(("%s: %s\n", exif_tag_get_name_in_ifd(tag,ifd), s));
snprintf(buffer, (size_t)maxsize, "%s: %s\n", exif_tag_get_name_in_ifd(tag,ifd), s);
}
}
}
}
/* Show the given MakerNote tag if it exists */
static void exif_get_mnote_tag(ExifData *d, unsigned int tag, char* buffer, unsigned int maxsize)
{
ExifMnoteData *mn = NULL;
int i, num;
char buf[1024];
if ( (d!=NULL) && (buffer!=NULL) && (maxsize > 0) )
{
mn = exif_data_get_mnote_data(d);
}
else
{
return;
}
if ( mn != NULL )
{
num = exif_mnote_data_count(mn);
/* Loop through all MakerNote tags, searching for the desired one */
for (i=0; i < num; ++i)
{
if (exif_mnote_data_get_id(mn, i) == tag)
{
if (exif_mnote_data_get_value(mn, i, buf, sizeof(buf)))
{
/* Don't bother printing it if it's entirely blank */
exif_trim_spaces(buf);
if (*buf != '\0')
{
snprintf(buffer, (size_t)maxsize, "%s: %s\n", exif_mnote_data_get_title(mn, i), buf);
}
}
}
}
}
}
/* return data structure with exif data if available */
ExifData * exif_get_data(char *path)
{
ExifData *ed = NULL;
/* Load an ExifData object from an EXIF file */
ed = exif_data_new_from_file(path);
if (ed == NULL)
{
D(("File not readable or no Exif data present in %s\n", path));
}
return(ed);
}
/* get exif data in readable form */
void exif_get_info(ExifData * ed, char *buffer, unsigned int maxsize)
{
ExifEntry *entry = NULL;
char buf[64];
if ( (buffer == NULL) || (maxsize == 0) )
{
return;
}
else if (ed == NULL )
{
snprintf(buffer, (size_t)maxsize, "%s\n", "No Exif data in file.");
return;
}
else if ( ed != NULL )
{
/* normal exif tags */
exif_get_tag(ed, EXIF_IFD_0, EXIF_TAG_MAKE, buffer, maxsize);
exif_get_tag(ed, EXIF_IFD_0, EXIF_TAG_MODEL, buffer + strlen(buffer), maxsize - strlen(buffer));
exif_get_tag(ed, EXIF_IFD_0, EXIF_TAG_IMAGE_DESCRIPTION, buffer + strlen(buffer), maxsize - strlen(buffer));
exif_get_tag(ed, EXIF_IFD_EXIF, EXIF_TAG_DATE_TIME_ORIGINAL, buffer + strlen(buffer), maxsize - strlen(buffer));
exif_get_tag(ed, EXIF_IFD_EXIF, EXIF_TAG_DATE_TIME_DIGITIZED, buffer + strlen(buffer), maxsize - strlen(buffer));
exif_get_tag(ed, EXIF_IFD_EXIF, EXIF_TAG_EXPOSURE_TIME, buffer + strlen(buffer), maxsize - strlen(buffer));
exif_get_tag(ed, EXIF_IFD_EXIF, EXIF_TAG_SHUTTER_SPEED_VALUE, buffer + strlen(buffer), maxsize - strlen(buffer));
exif_get_tag(ed, EXIF_IFD_EXIF, EXIF_TAG_FNUMBER, buffer + strlen(buffer), maxsize - strlen(buffer));
exif_get_tag(ed, EXIF_IFD_EXIF, EXIF_TAG_APERTURE_VALUE, buffer + strlen(buffer), maxsize - strlen(buffer));
exif_get_tag(ed, EXIF_IFD_EXIF, EXIF_TAG_EXPOSURE_BIAS_VALUE, buffer + strlen(buffer), maxsize - strlen(buffer));
exif_get_tag(ed, EXIF_IFD_EXIF, EXIF_TAG_ISO_SPEED_RATINGS, buffer + strlen(buffer), maxsize - strlen(buffer));
exif_get_tag(ed, EXIF_IFD_EXIF, EXIF_TAG_FOCAL_LENGTH, buffer + strlen(buffer), maxsize - strlen(buffer));
exif_get_tag(ed, EXIF_IFD_EXIF, EXIF_TAG_FOCAL_LENGTH_IN_35MM_FILM, buffer + strlen(buffer), maxsize - strlen(buffer));
exif_get_tag(ed, EXIF_IFD_EXIF, EXIF_TAG_EXPOSURE_MODE, buffer + strlen(buffer), maxsize - strlen(buffer));
exif_get_tag(ed, EXIF_IFD_EXIF, EXIF_TAG_EXPOSURE_PROGRAM, buffer + strlen(buffer), maxsize - strlen(buffer));
exif_get_tag(ed, EXIF_IFD_EXIF, EXIF_TAG_SCENE_CAPTURE_TYPE, buffer + strlen(buffer), maxsize - strlen(buffer));
exif_get_tag(ed, EXIF_IFD_EXIF, EXIF_TAG_FLASH, buffer + strlen(buffer), maxsize - strlen(buffer));
exif_get_tag(ed, EXIF_IFD_EXIF, EXIF_TAG_FLASH_ENERGY, buffer + strlen(buffer), maxsize - strlen(buffer));
/* vendor specific makernote tags */
entry = exif_content_get_entry(ed->ifd[EXIF_IFD_0], EXIF_TAG_MAKE);
if (entry != NULL)
{
if (exif_entry_get_value(entry, buf, sizeof(buf)))
{
exif_trim_spaces(buf);
/* Nikon */
if ( strcmp(buf, "Nikon") != 0 )
{
/* Digital Vari-Program */
exif_get_mnote_tag(ed, 171, buffer + strlen(buffer), maxsize - strlen(buffer));
}
}
}
}
}
#endif
|
