4 * Copyright (C) 2008 - 2009 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"
46 static gdouble exif_rational_to_double(ExifRational *r, gint sign)
48 if (!r || r->den == 0.0) return 0.0;
50 if (sign) return (gdouble)((gint)r->num) / (gdouble)((gint)r->den);
51 return (gdouble)r->num / r->den;
54 static gdouble exif_get_rational_as_double(ExifData *exif, const gchar *key)
59 r = exif_get_rational(exif, key, &sign);
60 return exif_rational_to_double(r, sign);
63 static GString *append_comma_text(GString *string, const gchar *text)
65 string = g_string_append(string, ", ");
66 string = g_string_append(string, text);
71 static gchar *remove_common_prefix(gchar *s, gchar *t)
75 if (!s || !t) return t;
77 for (i = 0; s[i] && t[i] && s[i] == t[i]; i++)
81 if (s[i-1] == ' ' || !s[i])
90 static gdouble get_crop_factor(ExifData *exif)
92 gdouble res_unit_tbl[] = {0.0, 25.4, 25.4, 10.0, 1.0, 0.001 };
93 gdouble xres = exif_get_rational_as_double(exif, "Exif.Photo.FocalPlaneXResolution");
94 gdouble yres = exif_get_rational_as_double(exif, "Exif.Photo.FocalPlaneYResolution");
97 gdouble xsize, ysize, size, ratio;
99 if (xres == 0.0 || yres == 0.0) return 0.0;
101 if (!exif_get_integer(exif, "Exif.Photo.FocalPlaneResolutionUnit", &res_unit)) return 0.0;
102 if (res_unit < 1 || res_unit > 5) return 0.0;
104 if (!exif_get_integer(exif, "Exif.Photo.PixelXDimension", &w)) return 0.0;
105 if (!exif_get_integer(exif, "Exif.Photo.PixelYDimension", &h)) return 0.0;
107 xsize = w * res_unit_tbl[res_unit] / xres;
108 ysize = h * res_unit_tbl[res_unit] / yres;
110 ratio = xsize / ysize;
112 if (ratio < 0.5 || ratio > 2.0) return 0.0; /* reasonable ratio */
114 size = sqrt(xsize * xsize + ysize * ysize);
116 if (size < 1.0 || size > 100.0) return 0.0; /* reasonable sensor size in mm */
118 return sqrt(36*36+24*24) / size;
122 static gint remove_suffix(gchar *str, const gchar *suffix, gint suffix_len)
124 gint str_len = strlen(str);
126 if (suffix_len < 0) suffix_len = strlen(suffix);
127 if (str_len < suffix_len) return FALSE;
129 if (strcmp(str + str_len - suffix_len, suffix) != 0) return FALSE;
130 str[str_len - suffix_len] = '\0';
135 static gchar *exif_build_formatted_Camera(ExifData *exif)
138 gchar *make = exif_get_data_as_text(exif, "Exif.Image.Make");
139 gchar *model = exif_get_data_as_text(exif, "Exif.Image.Model");
140 gchar *software = exif_get_data_as_text(exif, "Exif.Image.Software");
148 if (remove_suffix(make, " CORPORATION", 12)) { /* Nikon */ }
149 else if (remove_suffix(make, " Corporation", 12)) { /* Pentax */ }
150 else if (remove_suffix(make, " OPTICAL CO.,LTD", 16)) { /* OLYMPUS */ };
160 g_strstrip(software);
162 /* remove superfluous spaces (pentax K100D) */
163 for (i = 0, j = 0; software[i]; i++, j++)
165 if (software[i] == ' ' && software[i + 1] == ' ')
167 if (i != j) software[j] = software[i];
172 model2 = remove_common_prefix(make, model);
173 software2 = remove_common_prefix(model2, software);
175 text = g_strdup_printf("%s%s%s%s%s%s", (make) ? make : "", (make && model2) ? " " : "",
176 (model2) ? model2 : "",
177 (software2 && (make || model2)) ? " (" : "",
178 (software2) ? software2 : "",
179 (software2 && (make || model2)) ? ")" : "");
187 static gchar *exif_build_formatted_DateTime(ExifData *exif)
189 gchar *text = exif_get_data_as_text(exif, "Exif.Photo.DateTimeOriginal");
190 gchar *subsec = NULL;
192 if (text) subsec = exif_get_data_as_text(exif, "Exif.Photo.SubSecTimeOriginal");
195 text = exif_get_data_as_text(exif, "Exif.Image.DateTime");
196 if (text) subsec = exif_get_data_as_text(exif, "Exif.Photo.SubSecTime");
201 text = g_strconcat(tmp, ".", subsec, NULL);
208 static gchar *exif_build_formatted_ShutterSpeed(ExifData *exif)
212 r = exif_get_rational(exif, "Exif.Photo.ExposureTime", NULL);
213 if (r && r->num && r->den)
215 gdouble n = (gdouble)r->den / (gdouble)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 gdouble 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 && (gint)n - ((gint)(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);
233 static gchar *exif_build_formatted_Aperture(ExifData *exif)
237 n = exif_get_rational_as_double(exif, "Exif.Photo.FNumber");
238 if (n == 0.0) n = exif_get_rational_as_double(exif, "Exif.Photo.ApertureValue");
239 if (n == 0.0) return NULL;
241 return g_strdup_printf("f/%.1f", n);
244 static gchar *exif_build_formatted_ExposureBias(ExifData *exif)
250 r = exif_get_rational(exif, "Exif.Photo.ExposureBiasValue", &sign);
253 n = exif_rational_to_double(r, sign);
254 return g_strdup_printf("%+.1f", n);
257 static gchar *exif_build_formatted_FocalLength(ExifData *exif)
261 n = exif_get_rational_as_double(exif, "Exif.Photo.FocalLength");
262 if (n == 0.0) return NULL;
263 return g_strdup_printf("%.0f mm", n);
266 static gchar *exif_build_formatted_FocalLength35mmFilm(ExifData *exif)
271 if (exif_get_integer(exif, "Exif.Photo.FocalLengthIn35mmFilm", &n) && n != 0)
273 return g_strdup_printf("%d mm", n);
276 f = exif_get_rational_as_double(exif, "Exif.Photo.FocalLength");
277 if (f == 0.0) return NULL;
279 c = get_crop_factor(exif);
280 if (c == 0.0) return NULL;
282 return g_strdup_printf("%.0f mm", f * c);
285 static gchar *exif_build_formatted_ISOSpeedRating(ExifData *exif)
289 text = exif_get_data_as_text(exif, "Exif.Photo.ISOSpeedRatings");
290 /* kodak may set this instead */
291 if (!text) text = exif_get_data_as_text(exif, "Exif.Photo.ExposureIndex");
295 static gchar *exif_build_formatted_SubjectDistance(ExifData *exif)
301 r = exif_get_rational(exif, "Exif.Photo.SubjectDistance", &sign);
304 if ((glong)r->num == (glong)0xffffffff) return g_strdup(_("infinity"));
305 if ((glong)r->num == 0) return g_strdup(_("unknown"));
307 n = exif_rational_to_double(r, sign);
308 if (n == 0.0) return _("unknown");
309 return g_strdup_printf("%.3f m", n);
312 static gchar *exif_build_formatted_Flash(ExifData *exif)
314 /* grr, flash is a bitmask... */
320 if (!exif_get_integer(exif, "Exif.Photo.Flash", &n)) return NULL;
322 /* Exif 2.1 only defines first 3 bits */
323 if (n <= 0x07) return exif_get_data_as_text(exif, "Exif.Photo.Flash");
325 /* must be Exif 2.2 */
326 string = g_string_new("");
328 /* flash fired (bit 0) */
329 string = g_string_append(string, (n & 0x01) ? _("yes") : _("no"));
331 /* flash mode (bits 3, 4) */
333 if (v) string = append_comma_text(string, _("mode:"));
337 string = g_string_append(string, _("on"));
340 string = g_string_append(string, _("off"));
343 string = g_string_append(string, _("auto"));
347 /* return light (bits 1, 2) */
349 if (v == 2) string = append_comma_text(string, _("not detected by strobe"));
350 if (v == 3) string = append_comma_text(string, _("detected by strobe"));
352 /* we ignore flash function (bit 5) */
354 /* red-eye (bit 6) */
355 if ((n >> 5) & 0x01) string = append_comma_text(string, _("red-eye reduction"));
358 g_string_free(string, FALSE);
362 static gchar *exif_build_formatted_Resolution(ExifData *exif)
364 ExifRational *rx, *ry;
368 rx = exif_get_rational(exif, "Exif.Image.XResolution", NULL);
369 ry = exif_get_rational(exif, "Exif.Image.YResolution", NULL);
370 if (!rx || !ry) return NULL;
372 units = exif_get_data_as_text(exif, "Exif.Image.ResolutionUnit");
373 text = g_strdup_printf("%0.f x %0.f (%s/%s)", rx->den ? (gdouble)rx->num / rx->den : 1.0,
374 ry->den ? (gdouble)ry->num / ry->den : 1.0,
375 _("dot"), (units) ? units : _("unknown"));
381 static gchar *exif_build_formatted_ColorProfile(ExifData *exif)
383 const gchar *name = "";
384 const gchar *source = "";
385 guchar *profile_data;
388 profile_data = exif_get_color_profile(exif, &profile_len);
392 gchar *interop_index;
394 /* ColorSpace == 1 specifies sRGB per EXIF 2.2 */
395 if (!exif_get_integer(exif, "Exif.Photo.ColorSpace", &cs)) cs = 0;
396 interop_index = exif_get_data_as_text(exif, "Exif.Iop.InteroperabilityIndex");
401 source = "ColorSpace";
403 else if (cs == 2 || (interop_index && !strcmp(interop_index, "R03")))
405 name = _("AdobeRGB");
406 source = (cs == 2) ? "ColorSpace" : "Iop";
409 g_free(interop_index);
413 source = _("embedded");
419 profile = cmsOpenProfileFromMem(profile_data, profile_len);
422 name = cmsTakeProductName(profile);
423 cmsCloseProfile(profile);
425 g_free(profile_data);
429 if (name[0] == 0 && source[0] == 0) return NULL;
430 return g_strdup_printf("%s (%s)", name, source);
433 static gchar *exif_build_formatted_GPSPosition(ExifData *exif)
443 string = g_string_new("");
445 item = exif_get_item(exif, "Exif.GPSInfo.GPSLatitude");
446 ref = exif_get_data_as_text(exif, "Exif.GPSInfo.GPSLatitudeRef");
450 for (i = 0; i < exif_item_get_elements(item); i++)
452 value = exif_item_get_rational(item, NULL, i);
453 if (value && value->num && value->den)
454 p += (gdouble)value->num / (gdouble)value->den / pow(60.0, (gdouble)i);
457 p2 = (gint)((p - p1)*60);
458 p3 = ((p - p1)*60 - p2)*60;
460 g_string_append_printf(string, "%0lu° %0lu' %0.2f\" %.1s", p1, p2, p3, ref);
461 } // if (item && ref)
463 item = exif_get_item(exif, "Exif.GPSInfo.GPSLongitude");
464 ref = exif_get_data_as_text(exif, "Exif.GPSInfo.GPSLongitudeRef");
468 for (i = 0; i < exif_item_get_elements(item); i++)
470 value = exif_item_get_rational(item, NULL, i);
471 if (value && value->num && value->den)
472 p += (gdouble)value->num / (gdouble)value->den / pow(60.0, (gdouble)i);
475 p2 = (gint)((p - p1)*60);
476 p3 = ((p - p1)*60 - p2)*60;
478 g_string_append_printf(string, ", %0lu° %0lu' %0.2f\" %.1s", p1, p2, p3, ref);
479 } // if (item && ref)
482 g_string_free(string, FALSE);
485 } // static gchar *exif_build_forma...
487 static gchar *exif_build_formatted_GPSAltitude(ExifData *exif)
494 item = exif_get_item(exif, "Exif.GPSInfo.GPSAltitudeRef");
495 r = exif_get_rational(exif, "Exif.GPSInfo.GPSAltitude", NULL);
497 if (!r || !item) return NULL;
499 alt = exif_rational_to_double(r, 0);
500 exif_item_get_integer(item, &ref);
502 return g_strdup_printf("%0.f m %s", alt, (ref==0)?_("Above Sea Level"):_("Below Sea Level"));
506 /* List of custom formatted pseudo-exif tags */
507 #define EXIF_FORMATTED_TAG(name, label) { EXIF_FORMATTED()#name, label, exif_build_formatted##_##name }
509 ExifFormattedText ExifFormattedList[] = {
510 EXIF_FORMATTED_TAG(Camera, N_("Camera")),
511 EXIF_FORMATTED_TAG(DateTime, N_("Date")),
512 EXIF_FORMATTED_TAG(ShutterSpeed, N_("Shutter speed")),
513 EXIF_FORMATTED_TAG(Aperture, N_("Aperture")),
514 EXIF_FORMATTED_TAG(ExposureBias, N_("Exposure bias")),
515 EXIF_FORMATTED_TAG(ISOSpeedRating, N_("ISO sensitivity")),
516 EXIF_FORMATTED_TAG(FocalLength, N_("Focal length")),
517 EXIF_FORMATTED_TAG(FocalLength35mmFilm, N_("Focal length 35mm")),
518 EXIF_FORMATTED_TAG(SubjectDistance, N_("Subject distance")),
519 EXIF_FORMATTED_TAG(Flash, N_("Flash")),
520 EXIF_FORMATTED_TAG(Resolution, N_("Resolution")),
521 EXIF_FORMATTED_TAG(ColorProfile, N_("Color profile")),
522 EXIF_FORMATTED_TAG(GPSPosition, N_("GPS position")),
523 EXIF_FORMATTED_TAG(GPSAltitude, N_("GPS altitude")),
527 gchar *exif_get_formatted_by_key(ExifData *exif, const gchar *key, gint *key_valid)
529 if (strncmp(key, EXIF_FORMATTED(), EXIF_FORMATTED_LEN) == 0)
533 if (key_valid) *key_valid = TRUE;
535 key += EXIF_FORMATTED_LEN;
536 for (i = 0; ExifFormattedList[i].key; i++)
537 if (strcmp(key, ExifFormattedList[i].key + EXIF_FORMATTED_LEN) == 0)
538 return ExifFormattedList[i].build_func(exif);
541 if (key_valid) *key_valid = FALSE;
545 gchar *exif_get_description_by_key(const gchar *key)
547 if (!key) return NULL;
549 if (strncmp(key, EXIF_FORMATTED(), EXIF_FORMATTED_LEN) == 0)
553 key += EXIF_FORMATTED_LEN;
554 for (i = 0; ExifFormattedList[i].key; i++)
555 if (strcmp(key, ExifFormattedList[i].key + EXIF_FORMATTED_LEN) == 0)
556 return g_strdup(_(ExifFormattedList[i].description));
559 return exif_get_tag_description_by_key(key);
562 gint exif_get_integer(ExifData *exif, const gchar *key, gint *value)
566 item = exif_get_item(exif, key);
567 return exif_item_get_integer(item, value);
570 ExifRational *exif_get_rational(ExifData *exif, const gchar *key, gint *sign)
574 item = exif_get_item(exif, key);
575 return exif_item_get_rational(item, sign, 0);
578 gchar *exif_get_data_as_text(ExifData *exif, const gchar *key)
584 if (!key) return NULL;
586 text = exif_get_formatted_by_key(exif, key, &key_valid);
587 if (key_valid) return text;
589 item = exif_get_item(exif, key);
590 if (item) return exif_item_get_data_as_text(item);
596 static FileCacheData *exif_cache;
598 void exif_release_cb(FileData *fd)
604 ExifData *exif_read_fd(FileData *fd)
608 if (!fd) return NULL;
610 if (!exif_cache) exif_cache = file_cache_new(exif_release_cb, 4);
612 if (file_cache_get(exif_cache, fd)) return fd->exif;
614 /* CACHE_TYPE_XMP_METADATA file should exist only if the metadata are
615 * not writable directly, thus it should contain the most up-to-date version */
616 sidecar_path = cache_find_location(CACHE_TYPE_XMP_METADATA, fd->path);
618 if (!sidecar_path) sidecar_path = file_data_get_sidecar_path(fd, TRUE);
620 fd->exif = exif_read(fd->path, sidecar_path, fd->modified_xmp);
622 g_free(sidecar_path);
627 void exif_free_fd(FileData *fd, ExifData *exif)
630 g_assert(fd->exif == exif);
632 file_cache_put(exif_cache, fd, 1);
635 /* embedded icc in jpeg */
638 #define JPEG_MARKER 0xFF
639 #define JPEG_MARKER_SOI 0xD8
640 #define JPEG_MARKER_EOI 0xD9
641 #define JPEG_MARKER_APP1 0xE1
642 #define JPEG_MARKER_APP2 0xE2
644 /* jpeg container format:
645 all data markers start with 0XFF
646 2 byte long file start and end markers: 0xFFD8(SOI) and 0XFFD9(EOI)
647 4 byte long data segment markers in format: 0xFFTTSSSSNNN...
648 FF: 1 byte standard marker identifier
650 SSSS: 2 bytes in Motorola byte alignment for length of the data.
651 This value includes these 2 bytes in the count, making actual
652 length of NN... == SSSS - 2.
653 NNN.: the data in this segment
656 gint exif_jpeg_segment_find(guchar *data, guint size,
657 guchar app_marker, const gchar *magic, guint magic_len,
658 guint *seg_offset, guint *seg_length)
664 while (marker != app_marker &&
665 marker != JPEG_MARKER_EOI)
670 if (offset + 2 >= size ||
671 data[offset] != JPEG_MARKER) return FALSE;
673 marker = data[offset + 1];
674 if (marker != JPEG_MARKER_SOI &&
675 marker != JPEG_MARKER_EOI)
677 if (offset + 4 >= size) return FALSE;
678 length += ((guint)data[offset + 2] << 8) + data[offset + 3];
682 if (marker == app_marker &&
683 offset + length < size &&
684 length >= 4 + magic_len &&
685 memcmp(data + offset + 4, magic, magic_len) == 0)
687 *seg_offset = offset + 4;
688 *seg_length = length - 4;
695 gint exif_jpeg_parse_color(ExifData *exif, guchar *data, guint size)
697 guint seg_offset = 0;
698 guint seg_length = 0;
699 guint chunk_offset[255];
700 guint chunk_length[255];
701 guint chunk_count = 0;
703 /* For jpeg/jfif, ICC color profile data can be in more than one segment.
704 the data is in APP2 data segments that start with "ICC_PROFILE\x00\xNN\xTT"
705 NN = segment number for data
706 TT = total number of ICC segments (TT in each ICC segment should match)
709 while (exif_jpeg_segment_find(data + seg_offset + seg_length,
710 size - seg_offset - seg_length,
712 "ICC_PROFILE\x00", 12,
713 &seg_offset, &seg_length))
718 if (seg_length < 14) return FALSE;
720 chunk_num = data[seg_offset + 12];
721 chunk_tot = data[seg_offset + 13];
723 if (chunk_num == 0 || chunk_tot == 0) return FALSE;
725 if (chunk_count == 0)
729 chunk_count = (guint)chunk_tot;
730 for (i = 0; i < chunk_count; i++) chunk_offset[i] = 0;
731 for (i = 0; i < chunk_count; i++) chunk_length[i] = 0;
734 if (chunk_tot != chunk_count ||
735 chunk_num > chunk_count) return FALSE;
738 chunk_offset[chunk_num] = seg_offset + 14;
739 chunk_length[chunk_num] = seg_length - 14;
748 for (i = 0; i < chunk_count; i++) cp_length += chunk_length[i];
749 cp_data = g_malloc(cp_length);
751 for (i = 0; i < chunk_count; i++)
753 if (chunk_offset[i] == 0)
755 /* error, we never saw this chunk */
759 memcpy(cp_data, data + chunk_offset[i], chunk_length[i]);
761 DEBUG_1("Found embedded icc profile in jpeg");
762 exif_add_jpeg_color_profile(exif, cp_data, cp_length);
769 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */