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
|
//
// Copyright 2006 by Johannes Hofmann
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library 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
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA.
//
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/wait.h>
#include "util.h"
#include "ExifImageMetaData.H"
#define FOCAL_LENGTH_IN_35MM_FILM 0xa405
#define GPS_LATIITUDE 0x0002
#define GPS_LONGITUDE 0x0004
#define GPS_ALTITUDE 0x0006
static double
degminsecstr2double(char *val) {
double ret, dv;
ret = 0.0;
for (dv=1.0; dv <= 3600.0; dv = dv * 60.0) {
ret = ret + atof(val) / dv;
val = strchr(val, ',');
if (!val || val[1] == '\0') {
break;
} else {
val++;
}
}
return ret;
}
int
ExifImageMetaData::load_image(char *name) {
char * args[32];
FILE *p;
pid_t pid;
int status;
char buf[1024];
char val[1024];
int id;
args[0] = "exif";
args[1] = "-i";
args[2] = "-m";
args[3] = name;
args[4] = NULL;
p = pexecvp(args[0], args, &pid, "r");
if (p) {
while (fgets(buf, sizeof(buf), p) != NULL) {
if (sscanf(buf, "%x\t%[^\n]\n", &id, val) != 2) {
continue;
}
switch(id) {
case FOCAL_LENGTH_IN_35MM_FILM:
focallength_sensor_ratio = atof(val) / 35.0;
break;
case GPS_LONGITUDE:
longitude = degminsecstr2double(val);
break;
case GPS_LATIITUDE:
latitude = degminsecstr2double(val);
break;
case GPS_ALTITUDE:
height = atof(val);
break;
}
}
}
fclose(p);
waitpid(pid, &status, 0);
if (WEXITSTATUS(status) == 127 || WEXITSTATUS(status) == 126) {
fprintf(stderr, "%s not found\n", args[0]);
}
return 0;
}
int
ExifImageMetaData::save_image(char *in_img, char *out_img) {
return 1;
}
|
