15 #include <sys/types.h>
28 #include "format_raw.h"
29 #include "ui_fileops.h"
32 /* human readable key list */
34 ExifFormattedText ExifFormattedList[] = {
35 { "fCamera", N_("Camera") },
36 { "fDateTime", N_("Date") },
37 { "fShutterSpeed", N_("Shutter speed") },
38 { "fAperture", N_("Aperture") },
39 { "fExposureBias", N_("Exposure bias") },
40 { "fISOSpeedRating", N_("ISO sensitivity") },
41 { "fFocalLength", N_("Focal length") },
42 { "fFocalLength35mmFilm",N_("Focal length 35mm") },
43 { "fSubjectDistance", N_("Subject distance") },
44 { "fFlash", N_("Flash") },
45 { "fResolution", N_("Resolution") },
49 double exif_rational_to_double(ExifRational *r, gint sign)
51 if (!r || r->den == 0.0) return 0.0;
53 if (sign) return (double)((int)r->num) / (double)((int)r->den);
54 return (double)r->num / r->den;
57 double exif_get_rational_as_double(ExifData *exif, const gchar *key)
62 r = exif_get_rational(exif, key, &sign);
63 return exif_rational_to_double(r, sign);
66 static GString *append_comma_text(GString *string, const gchar *text)
68 string = g_string_append(string, ", ");
69 string = g_string_append(string, text);
74 static gchar *remove_common_prefix(gchar *s, gchar *t)
78 if (!s || !t) return t;
80 for (i = 0; s[i] == t[i]; i++)
84 if (s[i]==' ' || s[i]==0)
93 static double get_crop_factor(ExifData *exif)
95 double res_unit_tbl[] = {0.0, 25.4, 25.4, 10.0, 1.0, 0.001 };
97 double xres = exif_get_rational_as_double(exif, "Exif.Photo.FocalPlaneXResolution");
98 double yres = exif_get_rational_as_double(exif, "Exif.Photo.FocalPlaneYResolution");
101 double xsize, ysize, size, ratio;
103 if (xres == 0.0 || yres == 0.0) return 0.0;
105 if (!exif_get_integer(exif, "Exif.Photo.FocalPlaneResolutionUnit", &res_unit)) return 0.0;
106 if (res_unit < 1 || res_unit > 5) return 0.0;
108 if (!exif_get_integer(exif, "Exif.Photo.PixelXDimension", &w)) return 0.0;
109 if (!exif_get_integer(exif, "Exif.Photo.PixelYDimension", &h)) return 0.0;
111 xsize = w * res_unit_tbl[res_unit] / xres;
112 ysize = h * res_unit_tbl[res_unit] / yres;
114 ratio = xsize / ysize;
116 if (ratio < 0.5 || ratio > 2.0) return 0.0; /* reasonable ratio */
118 size = sqrt(xsize * xsize + ysize * ysize);
120 if (size < 1.0 || size > 100.0) return 0.0; /* reasonable sensor size in mm */
122 return sqrt(36*36+24*24) / size;
127 gchar *exif_get_formatted_by_key(ExifData *exif, const gchar *key, gint *key_valid)
129 /* must begin with f, else not formatted */
132 if (key_valid) *key_valid = FALSE;
136 if (key_valid) *key_valid = TRUE;
138 if (strcmp(key, "fCamera") == 0)
141 gchar *make = exif_get_data_as_text(exif, "Exif.Image.Make");
142 gchar *model = exif_get_data_as_text(exif, "Exif.Image.Model");
143 gchar *software = exif_get_data_as_text(exif, "Exif.Image.Software");
151 #define REMOVE_SUFFIX(str,suff) \
153 if (g_str_has_suffix(str,suff)) \
154 str[strlen(str)-(sizeof(suff)-1)] = 0; \
156 REMOVE_SUFFIX(make," Corporation"); /* Pentax */
157 REMOVE_SUFFIX(make," OPTICAL CO.,LTD"); /* OLYMPUS */
162 g_strstrip(software);
163 /* remove superfluous spaces (pentax K100D) */
164 for (i=0; software && software[i]; i++)
165 if (software[i] == ' ' && software[i+1] == ' ')
169 for (j=1; software[i+j]; j++)
170 if (software[i+j] != ' ')
172 memmove(software+i+1, software+i+j, strlen(software+i+j)+1);
175 model2 = remove_common_prefix(make, model);
176 software2 = remove_common_prefix(model2, software);
178 text = g_strdup_printf("%s%s%s%s%s%s", (make) ? make : "", ((make) && (model)) ? " " : "",
179 (model2) ? model2 : "",
180 (software2) ? " (" : "",
181 (software2) ? software2 : "",
182 (software2) ? ")" : "");
189 if (strcmp(key, "fDateTime") == 0)
191 gchar *text = exif_get_data_as_text(exif, "Exif.Photo.DateTimeOriginal");
192 gchar *subsec = NULL;
193 if (text) subsec = exif_get_data_as_text(exif, "Exif.Photo.SubSecTimeOriginal");
196 text = exif_get_data_as_text(exif, "Exif.Image.DateTime");
197 if (text) subsec = exif_get_data_as_text(exif, "Exif.Photo.SubSecTime");
202 text = g_strconcat(tmp, ".", subsec, NULL);
208 if (strcmp(key, "fShutterSpeed") == 0)
212 r = exif_get_rational(exif, "Exif.Photo.ExposureTime", NULL);
213 if (r && r->num && r->den)
215 double n = (double)r->den / (double)r->num;
216 return g_strdup_printf("%s%.0fs", n > 1.0 ? "1/" : "",
217 n > 1.0 ? n : 1.0 / n);
219 r = exif_get_rational(exif, "Exif.Photo.ShutterSpeedValue", NULL);
220 if (r && r->num && r->den)
222 double n = pow(2.0, exif_rational_to_double(r, TRUE));
224 /* Correct exposure time to avoid values like 1/91s (seen on Minolta DImage 7) */
225 if (n > 1.0 && (int)n - ((int)(n/10))*10 == 1) n--;
227 return g_strdup_printf("%s%.0fs", n > 1.0 ? "1/" : "",
228 n > 1.0 ? floor(n) : 1.0 / n);
232 if (strcmp(key, "fAperture") == 0)
236 n = exif_get_rational_as_double(exif, "Exif.Photo.FNumber");
237 if (n == 0.0) n = exif_get_rational_as_double(exif, "Exif.Photo.ApertureValue");
238 if (n == 0.0) return NULL;
240 return g_strdup_printf("f/%.1f", n);
242 if (strcmp(key, "fExposureBias") == 0)
248 r = exif_get_rational(exif, "Exif.Photo.ExposureBiasValue", &sign);
251 n = exif_rational_to_double(r, sign);
252 return g_strdup_printf("%+.1f", n);
254 if (strcmp(key, "fFocalLength") == 0)
258 n = exif_get_rational_as_double(exif, "Exif.Photo.FocalLength");
259 if (n == 0.0) return NULL;
260 return g_strdup_printf("%.0f mm", n);
262 if (strcmp(key, "fFocalLength35mmFilm") == 0)
267 if (exif_get_integer(exif, "Exif.Photo.FocalLengthIn35mmFilm", &n) && n != 0)
269 return g_strdup_printf("%d mm", n);
272 f = exif_get_rational_as_double(exif, "Exif.Photo.FocalLength");
273 c = get_crop_factor(exif);
275 if (f != 0.0 && c != 0.0)
277 return g_strdup_printf("%.0f mm", f * c);
282 if (strcmp(key, "fISOSpeedRating") == 0)
286 text = exif_get_data_as_text(exif, "Exif.Photo.ISOSpeedRatings");
287 /* kodak may set this instead */
288 if (!text) text = exif_get_data_as_text(exif, "Exif.Photo.ExposureIndex");
291 if (strcmp(key, "fSubjectDistance") == 0)
297 r = exif_get_rational(exif, "Exif.Photo.SubjectDistance", &sign);
300 if ((long)r->num == 0xffffffff) return g_strdup(_("infinity"));
301 if ((long)r->num == 0) return g_strdup(_("unknown"));
303 n = exif_rational_to_double(r, sign);
304 if (n == 0.0) return _("unknown");
305 return g_strdup_printf("%.3f m", n);
307 if (strcmp(key, "fFlash") == 0)
309 /* grr, flash is a bitmask... */
315 if (!exif_get_integer(exif, "Exif.Photo.Flash", &n)) return NULL;
317 /* Exif 2.1 only defines first 3 bits */
318 if (n <= 0x07) return exif_get_data_as_text(exif, "Exif.Photo.Flash");
320 /* must be Exif 2.2 */
321 string = g_string_new("");
323 /* flash fired (bit 0) */
324 string = g_string_append(string, (n & 0x01) ? _("yes") : _("no"));
326 /* flash mode (bits 3, 4) */
328 if (v) string = append_comma_text(string, _("mode:"));
332 string = g_string_append(string, _("on"));
335 string = g_string_append(string, _("off"));
338 string = g_string_append(string, _("auto"));
342 /* return light (bits 1, 2) */
344 if (v == 2) string = append_comma_text(string, _("not detected by strobe"));
345 if (v == 3) string = append_comma_text(string, _("detected by strobe"));
347 /* we ignore flash function (bit 5) */
349 /* red-eye (bit 6) */
350 if ((n >> 5) & 0x01) string = append_comma_text(string, _("red-eye reduction"));
353 g_string_free(string, FALSE);
356 if (strcmp(key, "fResolution") == 0)
358 ExifRational *rx, *ry;
362 rx = exif_get_rational(exif, "Exif.Image.XResolution", NULL);
363 ry = exif_get_rational(exif, "Exif.Image.YResolution", NULL);
364 if (!rx || !ry) return NULL;
366 units = exif_get_data_as_text(exif, "Exif.Image.ResolutionUnit");
367 text = g_strdup_printf("%0.f x %0.f (%s/%s)", rx->den ? (double)rx->num / rx->den : 1.0,
368 ry->den ? (double)ry->num / ry->den : 1.0,
369 _("dot"), (units) ? units : _("unknown"));
375 if (key_valid) *key_valid = FALSE;
379 const gchar *exif_get_description_by_key(const gchar *key)
383 if (!key) return NULL;
386 while (ExifFormattedList[i].key != NULL)
388 if (strcmp(key, ExifFormattedList[i].key) == 0) return _(ExifFormattedList[i].description);
392 return exif_get_tag_description_by_key(key);
395 gint exif_get_integer(ExifData *exif, const gchar *key, gint *value)
399 item = exif_get_item(exif, key);
400 return exif_item_get_integer(item, value);
403 ExifRational *exif_get_rational(ExifData *exif, const gchar *key, gint *sign)
407 item = exif_get_item(exif, key);
408 return exif_item_get_rational(item, sign);
411 gchar *exif_get_data_as_text(ExifData *exif, const gchar *key)
417 if (!key) return NULL;
419 text = exif_get_formatted_by_key(exif, key, &key_valid);
420 if (key_valid) return text;
422 item = exif_get_item(exif, key);
423 if (item) return exif_item_get_data_as_text(item);
428 ExifData *exif_read_fd(FileData *fd, gint parse_color_profile)
431 gchar *sidecar_path = NULL;
433 if (!fd) return NULL;
435 work = fd->parent ? fd->parent->sidecar_files : fd->sidecar_files;
437 if (filter_file_class(fd->extension, FORMAT_CLASS_RAWIMAGE))
441 FileData *sfd = work->data;
443 if (strcasecmp(sfd->extension, ".xmp") == 0)
445 sidecar_path = sfd->path;
452 // FIXME: some caching would be nice
453 return exif_read(fd->path, sidecar_path, parse_color_profile);