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 "filefilter.h"
40 #include "filecache.h"
41 #include "format_raw.h"
42 #include "ui_fileops.h"
45 static double exif_rational_to_double(ExifRational *r, gint sign)
47 if (!r || r->den == 0.0) return 0.0;
49 if (sign) return (double)((int)r->num) / (double)((int)r->den);
50 return (double)r->num / r->den;
53 static double exif_get_rational_as_double(ExifData *exif, const gchar *key)
58 r = exif_get_rational(exif, key, &sign);
59 return exif_rational_to_double(r, sign);
62 static GString *append_comma_text(GString *string, const gchar *text)
64 string = g_string_append(string, ", ");
65 string = g_string_append(string, text);
70 static gchar *remove_common_prefix(gchar *s, gchar *t)
74 if (!s || !t) return t;
76 for (i = 0; s[i] && t[i] && s[i] == t[i]; i++)
80 if (s[i-1] == ' ' || !s[i])
89 static double get_crop_factor(ExifData *exif)
91 double res_unit_tbl[] = {0.0, 25.4, 25.4, 10.0, 1.0, 0.001 };
92 double xres = exif_get_rational_as_double(exif, "Exif.Photo.FocalPlaneXResolution");
93 double yres = exif_get_rational_as_double(exif, "Exif.Photo.FocalPlaneYResolution");
96 double xsize, ysize, size, ratio;
98 if (xres == 0.0 || yres == 0.0) return 0.0;
100 if (!exif_get_integer(exif, "Exif.Photo.FocalPlaneResolutionUnit", &res_unit)) return 0.0;
101 if (res_unit < 1 || res_unit > 5) return 0.0;
103 if (!exif_get_integer(exif, "Exif.Photo.PixelXDimension", &w)) return 0.0;
104 if (!exif_get_integer(exif, "Exif.Photo.PixelYDimension", &h)) return 0.0;
106 xsize = w * res_unit_tbl[res_unit] / xres;
107 ysize = h * res_unit_tbl[res_unit] / yres;
109 ratio = xsize / ysize;
111 if (ratio < 0.5 || ratio > 2.0) return 0.0; /* reasonable ratio */
113 size = sqrt(xsize * xsize + ysize * ysize);
115 if (size < 1.0 || size > 100.0) return 0.0; /* reasonable sensor size in mm */
117 return sqrt(36*36+24*24) / size;
121 static gint remove_suffix(gchar *str, const gchar *suffix, gint suffix_len)
123 gint str_len = strlen(str);
125 if (suffix_len < 0) suffix_len = strlen(suffix);
126 if (str_len < suffix_len) return FALSE;
128 if (strcmp(str + str_len - suffix_len, suffix) != 0) return FALSE;
129 str[str_len - suffix_len] = '\0';
134 static gchar *exif_build_formatted_Camera(ExifData *exif)
137 gchar *make = exif_get_data_as_text(exif, "Exif.Image.Make");
138 gchar *model = exif_get_data_as_text(exif, "Exif.Image.Model");
139 gchar *software = exif_get_data_as_text(exif, "Exif.Image.Software");
147 if (remove_suffix(make, " CORPORATION", 12)) { /* Nikon */ }
148 else if (remove_suffix(make, " Corporation", 12)) { /* Pentax */ }
149 else if (remove_suffix(make, " OPTICAL CO.,LTD", 16)) { /* OLYMPUS */ };
159 g_strstrip(software);
161 /* remove superfluous spaces (pentax K100D) */
162 for (i = 0, j = 0; software[i]; i++, j++)
164 if (software[i] == ' ' && software[i + 1] == ' ')
166 if (i != j) software[j] = software[i];
171 model2 = remove_common_prefix(make, model);
172 software2 = remove_common_prefix(model2, software);
174 text = g_strdup_printf("%s%s%s%s%s%s", (make) ? make : "", (make && model2) ? " " : "",
175 (model2) ? model2 : "",
176 (software2 && (make || model2)) ? " (" : "",
177 (software2) ? software2 : "",
178 (software2 && (make || model2)) ? ")" : "");
186 static gchar *exif_build_formatted_DateTime(ExifData *exif)
188 gchar *text = exif_get_data_as_text(exif, "Exif.Photo.DateTimeOriginal");
189 gchar *subsec = NULL;
191 if (text) subsec = exif_get_data_as_text(exif, "Exif.Photo.SubSecTimeOriginal");
194 text = exif_get_data_as_text(exif, "Exif.Image.DateTime");
195 if (text) subsec = exif_get_data_as_text(exif, "Exif.Photo.SubSecTime");
200 text = g_strconcat(tmp, ".", subsec, NULL);
207 static gchar *exif_build_formatted_ShutterSpeed(ExifData *exif)
211 r = exif_get_rational(exif, "Exif.Photo.ExposureTime", NULL);
212 if (r && r->num && r->den)
214 double n = (double)r->den / (double)r->num;
215 return g_strdup_printf("%s%.0fs", n > 1.0 ? "1/" : "",
216 n > 1.0 ? n : 1.0 / n);
218 r = exif_get_rational(exif, "Exif.Photo.ShutterSpeedValue", NULL);
219 if (r && r->num && r->den)
221 double n = pow(2.0, exif_rational_to_double(r, TRUE));
223 /* Correct exposure time to avoid values like 1/91s (seen on Minolta DImage 7) */
224 if (n > 1.0 && (int)n - ((int)(n/10))*10 == 1) n--;
226 return g_strdup_printf("%s%.0fs", n > 1.0 ? "1/" : "",
227 n > 1.0 ? floor(n) : 1.0 / n);
232 static gchar *exif_build_formatted_Aperture(ExifData *exif)
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);
243 static gchar *exif_build_formatted_ExposureBias(ExifData *exif)
249 r = exif_get_rational(exif, "Exif.Photo.ExposureBiasValue", &sign);
252 n = exif_rational_to_double(r, sign);
253 return g_strdup_printf("%+.1f", n);
256 static gchar *exif_build_formatted_FocalLength(ExifData *exif)
260 n = exif_get_rational_as_double(exif, "Exif.Photo.FocalLength");
261 if (n == 0.0) return NULL;
262 return g_strdup_printf("%.0f mm", n);
265 static gchar *exif_build_formatted_FocalLength35mmFilm(ExifData *exif)
270 if (exif_get_integer(exif, "Exif.Photo.FocalLengthIn35mmFilm", &n) && n != 0)
272 return g_strdup_printf("%d mm", n);
275 f = exif_get_rational_as_double(exif, "Exif.Photo.FocalLength");
276 if (f == 0.0) return NULL;
278 c = get_crop_factor(exif);
279 if (c == 0.0) return NULL;
281 return g_strdup_printf("%.0f mm", f * c);
284 static gchar *exif_build_formatted_ISOSpeedRating(ExifData *exif)
288 text = exif_get_data_as_text(exif, "Exif.Photo.ISOSpeedRatings");
289 /* kodak may set this instead */
290 if (!text) text = exif_get_data_as_text(exif, "Exif.Photo.ExposureIndex");
294 static gchar *exif_build_formatted_SubjectDistance(ExifData *exif)
300 r = exif_get_rational(exif, "Exif.Photo.SubjectDistance", &sign);
303 if ((long)r->num == (long)0xffffffff) return g_strdup(_("infinity"));
304 if ((long)r->num == 0) return g_strdup(_("unknown"));
306 n = exif_rational_to_double(r, sign);
307 if (n == 0.0) return _("unknown");
308 return g_strdup_printf("%.3f m", n);
311 static gchar *exif_build_formatted_Flash(ExifData *exif)
313 /* grr, flash is a bitmask... */
319 if (!exif_get_integer(exif, "Exif.Photo.Flash", &n)) return NULL;
321 /* Exif 2.1 only defines first 3 bits */
322 if (n <= 0x07) return exif_get_data_as_text(exif, "Exif.Photo.Flash");
324 /* must be Exif 2.2 */
325 string = g_string_new("");
327 /* flash fired (bit 0) */
328 string = g_string_append(string, (n & 0x01) ? _("yes") : _("no"));
330 /* flash mode (bits 3, 4) */
332 if (v) string = append_comma_text(string, _("mode:"));
336 string = g_string_append(string, _("on"));
339 string = g_string_append(string, _("off"));
342 string = g_string_append(string, _("auto"));
346 /* return light (bits 1, 2) */
348 if (v == 2) string = append_comma_text(string, _("not detected by strobe"));
349 if (v == 3) string = append_comma_text(string, _("detected by strobe"));
351 /* we ignore flash function (bit 5) */
353 /* red-eye (bit 6) */
354 if ((n >> 5) & 0x01) string = append_comma_text(string, _("red-eye reduction"));
357 g_string_free(string, FALSE);
361 static gchar *exif_build_formatted_Resolution(ExifData *exif)
363 ExifRational *rx, *ry;
367 rx = exif_get_rational(exif, "Exif.Image.XResolution", NULL);
368 ry = exif_get_rational(exif, "Exif.Image.YResolution", NULL);
369 if (!rx || !ry) return NULL;
371 units = exif_get_data_as_text(exif, "Exif.Image.ResolutionUnit");
372 text = g_strdup_printf("%0.f x %0.f (%s/%s)", rx->den ? (double)rx->num / rx->den : 1.0,
373 ry->den ? (double)ry->num / ry->den : 1.0,
374 _("dot"), (units) ? units : _("unknown"));
380 static gchar *exif_build_formatted_ColorProfile(ExifData *exif)
382 const gchar *name = "";
383 const gchar *source = "";
384 guchar *profile_data;
387 profile_data = exif_get_color_profile(exif, &profile_len);
391 gchar *interop_index;
393 /* ColorSpace == 1 specifies sRGB per EXIF 2.2 */
394 if (!exif_get_integer(exif, "Exif.Photo.ColorSpace", &cs)) cs = 0;
395 interop_index = exif_get_data_as_text(exif, "Exif.Iop.InteroperabilityIndex");
400 source = "ColorSpace";
402 else if (cs == 2 || (interop_index && !strcmp(interop_index, "R03")))
404 name = _("AdobeRGB");
405 source = (cs == 2) ? "ColorSpace" : "Iop";
408 g_free(interop_index);
412 source = _("embedded");
418 profile = cmsOpenProfileFromMem(profile_data, profile_len);
421 name = cmsTakeProductName(profile);
422 cmsCloseProfile(profile);
424 g_free(profile_data);
428 if (name[0] == 0 && source[0] == 0) return NULL;
429 return g_strdup_printf("%s (%s)", name, source);
433 /* List of custom formatted pseudo-exif tags */
434 #define EXIF_FORMATTED_TAG(name, label) { "formatted."#name, label, exif_build_formatted##_##name }
436 ExifFormattedText ExifFormattedList[] = {
437 EXIF_FORMATTED_TAG(Camera, N_("Camera")),
438 EXIF_FORMATTED_TAG(DateTime, N_("Date")),
439 EXIF_FORMATTED_TAG(ShutterSpeed, N_("Shutter speed")),
440 EXIF_FORMATTED_TAG(Aperture, N_("Aperture")),
441 EXIF_FORMATTED_TAG(ExposureBias, N_("Exposure bias")),
442 EXIF_FORMATTED_TAG(ISOSpeedRating, N_("ISO sensitivity")),
443 EXIF_FORMATTED_TAG(FocalLength, N_("Focal length")),
444 EXIF_FORMATTED_TAG(FocalLength35mmFilm, N_("Focal length 35mm")),
445 EXIF_FORMATTED_TAG(SubjectDistance, N_("Subject distance")),
446 EXIF_FORMATTED_TAG(Flash, N_("Flash")),
447 EXIF_FORMATTED_TAG(Resolution, N_("Resolution")),
448 EXIF_FORMATTED_TAG(ColorProfile, N_("Color profile")),
452 gchar *exif_get_formatted_by_key(ExifData *exif, const gchar *key, gint *key_valid)
454 if (strncmp(key, "formatted.", 10) == 0)
458 if (key_valid) *key_valid = TRUE;
461 for (i = 0; ExifFormattedList[i].key; i++)
462 if (strcmp(key, ExifFormattedList[i].key + 10) == 0)
463 return ExifFormattedList[i].build_func(exif);
466 if (key_valid) *key_valid = FALSE;
470 const gchar *exif_get_description_by_key(const gchar *key)
472 if (!key) return NULL;
474 if (strncmp(key, "formatted.", 10) == 0)
479 for (i = 0; ExifFormattedList[i].key; i++)
480 if (strcmp(key, ExifFormattedList[i].key + 10) == 0)
481 return _(ExifFormattedList[i].description);
484 return exif_get_tag_description_by_key(key);
487 gint exif_get_integer(ExifData *exif, const gchar *key, gint *value)
491 item = exif_get_item(exif, key);
492 return exif_item_get_integer(item, value);
495 ExifRational *exif_get_rational(ExifData *exif, const gchar *key, gint *sign)
499 item = exif_get_item(exif, key);
500 return exif_item_get_rational(item, sign);
503 gchar *exif_get_data_as_text(ExifData *exif, const gchar *key)
509 if (!key) return NULL;
511 text = exif_get_formatted_by_key(exif, key, &key_valid);
512 if (key_valid) return text;
514 item = exif_get_item(exif, key);
515 if (item) return exif_item_get_data_as_text(item);
521 static FileCacheData *exif_cache;
523 void exif_release_cb(FileData *fd)
529 ExifData *exif_read_fd(FileData *fd)
531 gchar *sidecar_path = NULL;
533 if (!fd) return NULL;
535 if (!exif_cache) exif_cache = file_cache_new(exif_release_cb, 4);
537 if (file_cache_get(exif_cache, fd)) return fd->exif;
539 if (filter_file_class(fd->extension, FORMAT_CLASS_RAWIMAGE))
543 work = fd->parent ? fd->parent->sidecar_files : fd->sidecar_files;
546 FileData *sfd = work->data;
548 if (strcasecmp(sfd->extension, ".xmp") == 0)
550 sidecar_path = sfd->path;
556 fd->exif = exif_read(fd->path, sidecar_path);
560 void exif_free_fd(FileData *fd, ExifData *exif)
563 g_assert(fd->exif == exif);
565 file_cache_put(exif_cache, fd, 1);
568 /* embedded icc in jpeg */
571 #define JPEG_MARKER 0xFF
572 #define JPEG_MARKER_SOI 0xD8
573 #define JPEG_MARKER_EOI 0xD9
574 #define JPEG_MARKER_APP1 0xE1
575 #define JPEG_MARKER_APP2 0xE2
577 /* jpeg container format:
578 all data markers start with 0XFF
579 2 byte long file start and end markers: 0xFFD8(SOI) and 0XFFD9(EOI)
580 4 byte long data segment markers in format: 0xFFTTSSSSNNN...
581 FF: 1 byte standard marker identifier
583 SSSS: 2 bytes in Motorola byte alignment for length of the data.
584 This value includes these 2 bytes in the count, making actual
585 length of NN... == SSSS - 2.
586 NNN.: the data in this segment
589 gint exif_jpeg_segment_find(unsigned char *data, guint size,
590 guchar app_marker, const gchar *magic, guint magic_len,
591 guint *seg_offset, guint *seg_length)
597 while (marker != app_marker &&
598 marker != JPEG_MARKER_EOI)
603 if (offset + 2 >= size ||
604 data[offset] != JPEG_MARKER) return FALSE;
606 marker = data[offset + 1];
607 if (marker != JPEG_MARKER_SOI &&
608 marker != JPEG_MARKER_EOI)
610 if (offset + 4 >= size) return FALSE;
611 length += ((guint)data[offset + 2] << 8) + data[offset + 3];
615 if (marker == app_marker &&
616 offset + length < size &&
617 length >= 4 + magic_len &&
618 memcmp(data + offset + 4, magic, magic_len) == 0)
620 *seg_offset = offset + 4;
621 *seg_length = length - 4;
628 gint exif_jpeg_parse_color(ExifData *exif, unsigned char *data, guint size)
630 guint seg_offset = 0;
631 guint seg_length = 0;
632 guint chunk_offset[255];
633 guint chunk_length[255];
634 guint chunk_count = 0;
636 /* For jpeg/jfif, ICC color profile data can be in more than one segment.
637 the data is in APP2 data segments that start with "ICC_PROFILE\x00\xNN\xTT"
638 NN = segment number for data
639 TT = total number of ICC segments (TT in each ICC segment should match)
642 while (exif_jpeg_segment_find(data + seg_offset + seg_length,
643 size - seg_offset - seg_length,
645 "ICC_PROFILE\x00", 12,
646 &seg_offset, &seg_length))
651 if (seg_length < 14) return FALSE;
653 chunk_num = data[seg_offset + 12];
654 chunk_tot = data[seg_offset + 13];
656 if (chunk_num == 0 || chunk_tot == 0) return FALSE;
658 if (chunk_count == 0)
662 chunk_count = (guint)chunk_tot;
663 for (i = 0; i < chunk_count; i++) chunk_offset[i] = 0;
664 for (i = 0; i < chunk_count; i++) chunk_length[i] = 0;
667 if (chunk_tot != chunk_count ||
668 chunk_num > chunk_count) return FALSE;
671 chunk_offset[chunk_num] = seg_offset + 14;
672 chunk_length[chunk_num] = seg_length - 14;
677 unsigned char *cp_data;
681 for (i = 0; i < chunk_count; i++) cp_length += chunk_length[i];
682 cp_data = g_malloc(cp_length);
684 for (i = 0; i < chunk_count; i++)
686 if (chunk_offset[i] == 0)
688 /* error, we never saw this chunk */
692 memcpy(cp_data, data + chunk_offset[i], chunk_length[i]);
694 DEBUG_1("Found embedded icc profile in jpeg");
695 exif_add_jpeg_color_profile(exif, cp_data, cp_length);