4 * Copyright (C) 2008 The Geeqie Team
16 #include <sys/types.h>
22 /*** color support enabled ***/
24 #ifdef HAVE_LCMS_LCMS_H
25 #include <lcms/lcms.h>
39 #include "format_raw.h"
40 #include "ui_fileops.h"
43 /* human readable key list */
45 ExifFormattedText ExifFormattedList[] = {
46 { "fCamera", N_("Camera") },
47 { "fDateTime", N_("Date") },
48 { "fShutterSpeed", N_("Shutter speed") },
49 { "fAperture", N_("Aperture") },
50 { "fExposureBias", N_("Exposure bias") },
51 { "fISOSpeedRating", N_("ISO sensitivity") },
52 { "fFocalLength", N_("Focal length") },
53 { "fFocalLength35mmFilm",N_("Focal length 35mm") },
54 { "fSubjectDistance", N_("Subject distance") },
55 { "fFlash", N_("Flash") },
56 { "fResolution", N_("Resolution") },
57 { "fColorProfile", N_("Color profile") },
61 double exif_rational_to_double(ExifRational *r, gint sign)
63 if (!r || r->den == 0.0) return 0.0;
65 if (sign) return (double)((int)r->num) / (double)((int)r->den);
66 return (double)r->num / r->den;
69 double exif_get_rational_as_double(ExifData *exif, const gchar *key)
74 r = exif_get_rational(exif, key, &sign);
75 return exif_rational_to_double(r, sign);
78 static GString *append_comma_text(GString *string, const gchar *text)
80 string = g_string_append(string, ", ");
81 string = g_string_append(string, text);
86 static gchar *remove_common_prefix(gchar *s, gchar *t)
90 if (!s || !t) return t;
92 for (i = 0; s[i] && t[i] && s[i] == t[i]; i++)
96 if (s[i-1] == ' ' || !s[i])
105 static double get_crop_factor(ExifData *exif)
107 double res_unit_tbl[] = {0.0, 25.4, 25.4, 10.0, 1.0, 0.001 };
109 double xres = exif_get_rational_as_double(exif, "Exif.Photo.FocalPlaneXResolution");
110 double yres = exif_get_rational_as_double(exif, "Exif.Photo.FocalPlaneYResolution");
113 double xsize, ysize, size, ratio;
115 if (xres == 0.0 || yres == 0.0) return 0.0;
117 if (!exif_get_integer(exif, "Exif.Photo.FocalPlaneResolutionUnit", &res_unit)) return 0.0;
118 if (res_unit < 1 || res_unit > 5) return 0.0;
120 if (!exif_get_integer(exif, "Exif.Photo.PixelXDimension", &w)) return 0.0;
121 if (!exif_get_integer(exif, "Exif.Photo.PixelYDimension", &h)) return 0.0;
123 xsize = w * res_unit_tbl[res_unit] / xres;
124 ysize = h * res_unit_tbl[res_unit] / yres;
126 ratio = xsize / ysize;
128 if (ratio < 0.5 || ratio > 2.0) return 0.0; /* reasonable ratio */
130 size = sqrt(xsize * xsize + ysize * ysize);
132 if (size < 1.0 || size > 100.0) return 0.0; /* reasonable sensor size in mm */
134 return sqrt(36*36+24*24) / size;
139 gchar *exif_get_formatted_by_key(ExifData *exif, const gchar *key, gint *key_valid)
141 /* must begin with f, else not formatted */
144 if (key_valid) *key_valid = FALSE;
148 if (key_valid) *key_valid = TRUE;
150 if (strcmp(key, "fCamera") == 0)
153 gchar *make = exif_get_data_as_text(exif, "Exif.Image.Make");
154 gchar *model = exif_get_data_as_text(exif, "Exif.Image.Model");
155 gchar *software = exif_get_data_as_text(exif, "Exif.Image.Software");
163 #define REMOVE_SUFFIX(str,suff) \
165 if (g_str_has_suffix(str,suff)) \
166 str[strlen(str)-(sizeof(suff)-1)] = 0; \
168 REMOVE_SUFFIX(make," Corporation"); /* Pentax */
169 REMOVE_SUFFIX(make," OPTICAL CO.,LTD"); /* OLYMPUS */
170 REMOVE_SUFFIX(make," CORPORATION"); /* Nikon */
175 g_strstrip(software);
176 /* remove superfluous spaces (pentax K100D) */
177 for (i=0; software && software[i]; i++)
178 if (software[i] == ' ' && software[i+1] == ' ')
182 for (j=1; software[i+j]; j++)
183 if (software[i+j] != ' ')
185 memmove(software+i+1, software+i+j, strlen(software+i+j)+1);
188 model2 = remove_common_prefix(make, model);
189 software2 = remove_common_prefix(model2, software);
191 text = g_strdup_printf("%s%s%s%s%s%s", (make) ? make : "", (make && model2) ? " " : "",
192 (model2) ? model2 : "",
193 (software2 && (make || model2)) ? " (" : "",
194 (software2) ? software2 : "",
195 (software2 && (make || model2)) ? ")" : "");
202 if (strcmp(key, "fDateTime") == 0)
204 gchar *text = exif_get_data_as_text(exif, "Exif.Photo.DateTimeOriginal");
205 gchar *subsec = NULL;
206 if (text) subsec = exif_get_data_as_text(exif, "Exif.Photo.SubSecTimeOriginal");
209 text = exif_get_data_as_text(exif, "Exif.Image.DateTime");
210 if (text) subsec = exif_get_data_as_text(exif, "Exif.Photo.SubSecTime");
215 text = g_strconcat(tmp, ".", subsec, NULL);
221 if (strcmp(key, "fShutterSpeed") == 0)
225 r = exif_get_rational(exif, "Exif.Photo.ExposureTime", NULL);
226 if (r && r->num && r->den)
228 double n = (double)r->den / (double)r->num;
229 return g_strdup_printf("%s%.0fs", n > 1.0 ? "1/" : "",
230 n > 1.0 ? n : 1.0 / n);
232 r = exif_get_rational(exif, "Exif.Photo.ShutterSpeedValue", NULL);
233 if (r && r->num && r->den)
235 double n = pow(2.0, exif_rational_to_double(r, TRUE));
237 /* Correct exposure time to avoid values like 1/91s (seen on Minolta DImage 7) */
238 if (n > 1.0 && (int)n - ((int)(n/10))*10 == 1) n--;
240 return g_strdup_printf("%s%.0fs", n > 1.0 ? "1/" : "",
241 n > 1.0 ? floor(n) : 1.0 / n);
245 if (strcmp(key, "fAperture") == 0)
249 n = exif_get_rational_as_double(exif, "Exif.Photo.FNumber");
250 if (n == 0.0) n = exif_get_rational_as_double(exif, "Exif.Photo.ApertureValue");
251 if (n == 0.0) return NULL;
253 return g_strdup_printf("f/%.1f", n);
255 if (strcmp(key, "fExposureBias") == 0)
261 r = exif_get_rational(exif, "Exif.Photo.ExposureBiasValue", &sign);
264 n = exif_rational_to_double(r, sign);
265 return g_strdup_printf("%+.1f", n);
267 if (strcmp(key, "fFocalLength") == 0)
271 n = exif_get_rational_as_double(exif, "Exif.Photo.FocalLength");
272 if (n == 0.0) return NULL;
273 return g_strdup_printf("%.0f mm", n);
275 if (strcmp(key, "fFocalLength35mmFilm") == 0)
280 if (exif_get_integer(exif, "Exif.Photo.FocalLengthIn35mmFilm", &n) && n != 0)
282 return g_strdup_printf("%d mm", n);
285 f = exif_get_rational_as_double(exif, "Exif.Photo.FocalLength");
286 c = get_crop_factor(exif);
288 if (f != 0.0 && c != 0.0)
290 return g_strdup_printf("%.0f mm", f * c);
295 if (strcmp(key, "fISOSpeedRating") == 0)
299 text = exif_get_data_as_text(exif, "Exif.Photo.ISOSpeedRatings");
300 /* kodak may set this instead */
301 if (!text) text = exif_get_data_as_text(exif, "Exif.Photo.ExposureIndex");
304 if (strcmp(key, "fSubjectDistance") == 0)
310 r = exif_get_rational(exif, "Exif.Photo.SubjectDistance", &sign);
313 if ((long)r->num == 0xffffffff) return g_strdup(_("infinity"));
314 if ((long)r->num == 0) return g_strdup(_("unknown"));
316 n = exif_rational_to_double(r, sign);
317 if (n == 0.0) return _("unknown");
318 return g_strdup_printf("%.3f m", n);
320 if (strcmp(key, "fFlash") == 0)
322 /* grr, flash is a bitmask... */
328 if (!exif_get_integer(exif, "Exif.Photo.Flash", &n)) return NULL;
330 /* Exif 2.1 only defines first 3 bits */
331 if (n <= 0x07) return exif_get_data_as_text(exif, "Exif.Photo.Flash");
333 /* must be Exif 2.2 */
334 string = g_string_new("");
336 /* flash fired (bit 0) */
337 string = g_string_append(string, (n & 0x01) ? _("yes") : _("no"));
339 /* flash mode (bits 3, 4) */
341 if (v) string = append_comma_text(string, _("mode:"));
345 string = g_string_append(string, _("on"));
348 string = g_string_append(string, _("off"));
351 string = g_string_append(string, _("auto"));
355 /* return light (bits 1, 2) */
357 if (v == 2) string = append_comma_text(string, _("not detected by strobe"));
358 if (v == 3) string = append_comma_text(string, _("detected by strobe"));
360 /* we ignore flash function (bit 5) */
362 /* red-eye (bit 6) */
363 if ((n >> 5) & 0x01) string = append_comma_text(string, _("red-eye reduction"));
366 g_string_free(string, FALSE);
369 if (strcmp(key, "fResolution") == 0)
371 ExifRational *rx, *ry;
375 rx = exif_get_rational(exif, "Exif.Image.XResolution", NULL);
376 ry = exif_get_rational(exif, "Exif.Image.YResolution", NULL);
377 if (!rx || !ry) return NULL;
379 units = exif_get_data_as_text(exif, "Exif.Image.ResolutionUnit");
380 text = g_strdup_printf("%0.f x %0.f (%s/%s)", rx->den ? (double)rx->num / rx->den : 1.0,
381 ry->den ? (double)ry->num / ry->den : 1.0,
382 _("dot"), (units) ? units : _("unknown"));
387 if (strcmp(key, "fColorProfile") == 0)
389 const gchar *name = "";
390 const gchar *source = "";
391 unsigned char *profile_data;
393 profile_data = exif_get_color_profile(exif, &profile_len);
397 gchar *interop_index;
399 /* ColorSpace == 1 specifies sRGB per EXIF 2.2 */
400 if (!exif_get_integer(exif, "Exif.Photo.ColorSpace", &cs)) cs = 0;
401 interop_index = exif_get_data_as_text(exif, "Exif.Iop.InteroperabilityIndex");
406 source = "ColorSpace";
408 else if (cs == 2 || (interop_index && !strcmp(interop_index, "R03")))
410 name = _("AdobeRGB");
411 source = (cs == 2) ? "ColorSpace" : "Iop";
414 g_free(interop_index);
418 source = _("embedded");
424 profile = cmsOpenProfileFromMem(profile_data, profile_len);
427 name = cmsTakeProductName(profile);
428 cmsCloseProfile(profile);
430 g_free(profile_data);
434 if (name[0] == 0 && source[0] == 0) return NULL;
435 return g_strdup_printf("%s (%s)", name, source);
438 if (key_valid) *key_valid = FALSE;
442 const gchar *exif_get_description_by_key(const gchar *key)
446 if (!key) return NULL;
449 while (ExifFormattedList[i].key != NULL)
451 if (strcmp(key, ExifFormattedList[i].key) == 0) return _(ExifFormattedList[i].description);
455 return exif_get_tag_description_by_key(key);
458 gint exif_get_integer(ExifData *exif, const gchar *key, gint *value)
462 item = exif_get_item(exif, key);
463 return exif_item_get_integer(item, value);
466 ExifRational *exif_get_rational(ExifData *exif, const gchar *key, gint *sign)
470 item = exif_get_item(exif, key);
471 return exif_item_get_rational(item, sign);
474 gchar *exif_get_data_as_text(ExifData *exif, const gchar *key)
480 if (!key) return NULL;
482 text = exif_get_formatted_by_key(exif, key, &key_valid);
483 if (key_valid) return text;
485 item = exif_get_item(exif, key);
486 if (item) return exif_item_get_data_as_text(item);
491 ExifData *exif_read_fd(FileData *fd)
494 gchar *sidecar_path = NULL;
496 if (!fd) return NULL;
498 work = fd->parent ? fd->parent->sidecar_files : fd->sidecar_files;
500 if (filter_file_class(fd->extension, FORMAT_CLASS_RAWIMAGE))
504 FileData *sfd = work->data;
506 if (strcasecmp(sfd->extension, ".xmp") == 0)
508 sidecar_path = sfd->path;
515 // FIXME: some caching would be nice
516 return exif_read(fd->path, sidecar_path);
521 /* embedded icc in jpeg */
524 #define JPEG_MARKER 0xFF
525 #define JPEG_MARKER_SOI 0xD8
526 #define JPEG_MARKER_EOI 0xD9
527 #define JPEG_MARKER_APP1 0xE1
528 #define JPEG_MARKER_APP2 0xE2
530 /* jpeg container format:
531 all data markers start with 0XFF
532 2 byte long file start and end markers: 0xFFD8(SOI) and 0XFFD9(EOI)
533 4 byte long data segment markers in format: 0xFFTTSSSSNNN...
534 FF: 1 byte standard marker identifier
536 SSSS: 2 bytes in Motorola byte alignment for length of the data.
537 This value includes these 2 bytes in the count, making actual
538 length of NN... == SSSS - 2.
539 NNN.: the data in this segment
542 gint exif_jpeg_segment_find(unsigned char *data, guint size,
543 guchar app_marker, const gchar *magic, guint magic_len,
544 guint *seg_offset, guint *seg_length)
550 while (marker != app_marker &&
551 marker != JPEG_MARKER_EOI)
556 if (offset + 2 >= size ||
557 data[offset] != JPEG_MARKER) return FALSE;
559 marker = data[offset + 1];
560 if (marker != JPEG_MARKER_SOI &&
561 marker != JPEG_MARKER_EOI)
563 if (offset + 4 >= size) return FALSE;
564 length += ((guint)data[offset + 2] << 8) + data[offset + 3];
568 if (marker == app_marker &&
569 offset + length < size &&
570 length >= 4 + magic_len &&
571 memcmp(data + offset + 4, magic, magic_len) == 0)
573 *seg_offset = offset + 4;
574 *seg_length = length - 4;
581 gint exif_jpeg_parse_color(ExifData *exif, unsigned char *data, guint size)
583 guint seg_offset = 0;
584 guint seg_length = 0;
585 guint chunk_offset[255];
586 guint chunk_length[255];
587 guint chunk_count = 0;
589 /* For jpeg/jfif, ICC color profile data can be in more than one segment.
590 the data is in APP2 data segments that start with "ICC_PROFILE\x00\xNN\xTT"
591 NN = segment number for data
592 TT = total number of ICC segments (TT in each ICC segment should match)
595 while (exif_jpeg_segment_find(data + seg_offset + seg_length,
596 size - seg_offset - seg_length,
598 "ICC_PROFILE\x00", 12,
599 &seg_offset, &seg_length))
604 if (seg_length < 14) return FALSE;
606 chunk_num = data[seg_offset + 12];
607 chunk_tot = data[seg_offset + 13];
609 if (chunk_num == 0 || chunk_tot == 0) return FALSE;
611 if (chunk_count == 0)
615 chunk_count = (guint)chunk_tot;
616 for (i = 0; i < chunk_count; i++) chunk_offset[i] = 0;
617 for (i = 0; i < chunk_count; i++) chunk_length[i] = 0;
620 if (chunk_tot != chunk_count ||
621 chunk_num > chunk_count) return FALSE;
624 chunk_offset[chunk_num] = seg_offset + 14;
625 chunk_length[chunk_num] = seg_length - 14;
630 unsigned char *cp_data;
634 for (i = 0; i < chunk_count; i++) cp_length += chunk_length[i];
635 cp_data = g_malloc(cp_length);
637 for (i = 0; i < chunk_count; i++)
639 if (chunk_offset[i] == 0)
641 /* error, we never saw this chunk */
645 memcpy(cp_data, data + chunk_offset[i], chunk_length[i]);
647 if (debug) printf("Found embedded icc profile in jpeg\n");
648 exif_add_jpeg_color_profile(exif, cp_data, cp_length);