diff options
Diffstat (limited to 'src/ImageMetaData.cxx')
| -rw-r--r-- | src/ImageMetaData.cxx | 340 |
1 files changed, 340 insertions, 0 deletions
diff --git a/src/ImageMetaData.cxx b/src/ImageMetaData.cxx new file mode 100644 index 0000000..6519239 --- /dev/null +++ b/src/ImageMetaData.cxx @@ -0,0 +1,340 @@ +// +// Copyright 2006 Johannes Hofmann <Johannes.Hofmann@gmx.de> +// +// This software may be used and distributed according to the terms +// of the GNU General Public License, incorporated herein by reference. + +#include <stdlib.h> +#include <stdio.h> +#include <math.h> +#include <string.h> +#include <sys/types.h> +#include <sys/wait.h> +#include <sys/stat.h> + + +#include "util.h" + +#include "ImageMetaData.H" + +ImageMetaData::ImageMetaData() { + longitude = NAN; + latitude = NAN; + height = 0.0; + direction = 0.0; + nick = 0.0; + tilt = 0.0; + focal_length_35mm = 35.0; + scale = NAN; + projection_type = 0; +} + + +int +ImageMetaData::load_image(char *name, int img_width) { + int ret; + + ret = load_image_jpgcom(name); + if (ret == 2) { // old format + focal_length_35mm = scale * 35.0 / (double) img_width; + } else if (ret == 1) { // get reasonable defaults from exif data + ret = load_image_exif(name); + } + + return ret; +} + +int +ImageMetaData::save_image(char *in_img, char *out_img) { + return save_image_jpgcom(in_img, out_img); +} + +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; +} + +#define EXIF_FOCAL_LENGTH_IN_35MM_FILM 0xa405 +#define EXIF_GPS_LATIITUDE 0x0002 +#define EXIF_GPS_LONGITUDE 0x0004 +#define EXIF_GPS_ALTITUDE 0x0006 + +int +ImageMetaData::load_image_exif(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 EXIF_FOCAL_LENGTH_IN_35MM_FILM: + focal_length_35mm = atof(val); + break; + case EXIF_GPS_LONGITUDE: + longitude = degminsecstr2double(val); + break; + case EXIF_GPS_LATIITUDE: + latitude = degminsecstr2double(val); + break; + case EXIF_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; +} + + +#define GIPFEL_FORMAT_1 "gipfel: longitude %lf, latitude %lf, height %lf, direction %lf, nick %lf, tilt %lf, scale %lf, projection type %d" +#define GIPFEL_FORMAT_2 "gipfel: longitude %lf, latitude %lf, height %lf, direction %lf, nick %lf, tilt %lf, focal_length_35mm %lf, projection type %d" + +int +ImageMetaData::load_image_jpgcom(char *name) { + char * args[32]; + FILE *p; + pid_t pid; + int status; + char buf[1024]; + double lo, la, he, dir, ni, ti, fr; + int pt; + int ret = 1; + + args[0] = "rdjpgcom"; + args[1] = name; + args[2] = NULL; + + p = pexecvp(args[0], args, &pid, "r"); + + if (p) { + while (fgets(buf, sizeof(buf), p) != NULL) { + if (sscanf(buf, GIPFEL_FORMAT_2, + &lo, &la, &he, &dir, &ni, &ti, &fr, &pt) >= 7) { + + longitude = lo; + latitude = la; + height = he; + direction = dir; + nick = ni; + tilt = ti; + focal_length_35mm = fr; + projection_type = pt; + + ret = 0; + + break; + } else if (sscanf(buf, GIPFEL_FORMAT_1, + &lo, &la, &he, &dir, &ni, &ti, &fr, &pt) >= 7) { + + longitude = lo; + latitude = la; + height = he; + direction = dir; + nick = ni; + tilt = ti; + scale = fr; + projection_type = pt; + + ret = 2; // special return value for compatibility with + // old format + + break; + } + } + + fclose(p); + waitpid(pid, &status, 0); + if (WEXITSTATUS(status) == 127 || WEXITSTATUS(status) == 126) { + fprintf(stderr, "%s not found\n", args[0]); + } + } + + return ret; +} + +int +ImageMetaData::save_image_jpgcom(char *in_img, char *out_img) { + char * args[32]; + FILE *p, *out; + pid_t pid; + char buf[1024]; + int status; + size_t n; + struct stat in_stat, out_stat; + + if (stat(in_img, &in_stat) != 0) { + perror("stat"); + return 1; + } + + if (stat(out_img, &out_stat) == 0) { + if (in_stat.st_ino == out_stat.st_ino) { + fprintf(stderr, "Input image %s and output image %s are the same file\n", + in_img, out_img); + return 1; + } + } + + out = fopen(out_img, "w"); + if (out == NULL) { + perror("fopen"); + return 1; + } + + snprintf(buf, sizeof(buf), GIPFEL_FORMAT_2, + longitude, + latitude, + height, + direction, + nick, + tilt, + focal_length_35mm, + projection_type); + + // try to save gipfel data in JPEG comment section + args[0] = "wrjpgcom"; + args[1] = "-replace"; + args[2] = "-comment"; + args[3] = buf; + args[4] = in_img; + args[5] = NULL; + + p = pexecvp(args[0], args, &pid, "r"); + + if (p) { + while ((n = fread(buf, 1, sizeof(buf), p)) != 0) { + if (fwrite(buf, 1, n, out) != n) { + perror("fwrite"); + fclose(out); + fclose(p); + waitpid(pid, &status, 0); + } + } + fclose(p); + waitpid(pid, &status, 0); + if (WEXITSTATUS(status) == 127 || WEXITSTATUS(status) == 126) { + fprintf(stderr, "%s not found\n", args[0]); + } + } + + fclose(out); + return 0; +} + + +double +ImageMetaData::get_longitude() { + return longitude; +} + +double +ImageMetaData::get_latitude() { + return latitude; +} + +double +ImageMetaData::get_height() { + return height; +} + +double +ImageMetaData::get_direction() { + return direction; +} + +double +ImageMetaData::get_nick() { + return nick; +} + +double +ImageMetaData::get_tilt() { + return tilt; +} + +double +ImageMetaData::get_focal_length_35mm() { + return focal_length_35mm; +} + +int +ImageMetaData::get_projection_type() { + return projection_type; +} + +void +ImageMetaData::set_longitude(double v) { + longitude = v; +} + +void +ImageMetaData::set_latitude(double v) { + latitude = v; +} + +void +ImageMetaData::set_height(double v) { + height = v; +} + +void +ImageMetaData::set_direction(double v) { + direction = v; +} + +void +ImageMetaData::set_nick(double v) { + nick = v; +} + +void +ImageMetaData::set_tilt(double v) { + tilt = v; +} + +void +ImageMetaData::set_focal_length_35mm(double v) { + focal_length_35mm = v; +} + +void +ImageMetaData::set_projection_type(int v) { + projection_type = v; +} |