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 };
93 double xres = exif_get_rational_as_double(exif, "Exif.Photo.FocalPlaneXResolution");
94 double yres = exif_get_rational_as_double(exif, "Exif.Photo.FocalPlaneYResolution");
97 double 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; software[i]; i++)
164 if (software[i] == ' ' && software[i + 1] == ' ')
168 for (j = 1; software[i + j] == ' '; j++);
169 memmove(software + i + 1, software + i + j, strlen(software + i + j) + 1);
173 model2 = remove_common_prefix(make, model);
174 software2 = remove_common_prefix(model2, software);
176 text = g_strdup_printf("%s%s%s%s%s%s", (make) ? make : "", (make && model2) ? " " : "",
177 (model2) ? model2 : "",
178 (software2 && (make || model2)) ? " (" : "",
179 (software2) ? software2 : "",
180 (software2 && (make || model2)) ? ")" : "");
188 static gchar *exif_build_formatted_DateTime(ExifData *exif)
190 gchar *text = exif_get_data_as_text(exif, "Exif.Photo.DateTimeOriginal");
191 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);
209 static gchar *exif_build_formatted_ShutterSpeed(ExifData *exif)
213 r = exif_get_rational(exif, "Exif.Photo.ExposureTime", NULL);
214 if (r && r->num && r->den)
216 double n = (double)r->den / (double)r->num;
217 return g_strdup_printf("%s%.0fs", n > 1.0 ? "1/" : "",
218 n > 1.0 ? n : 1.0 / n);
220 r = exif_get_rational(exif, "Exif.Photo.ShutterSpeedValue", NULL);
221 if (r && r->num && r->den)
223 double n = pow(2.0, exif_rational_to_double(r, TRUE));
225 /* Correct exposure time to avoid values like 1/91s (seen on Minolta DImage 7) */
226 if (n > 1.0 && (int)n - ((int)(n/10))*10 == 1) n--;
228 return g_strdup_printf("%s%.0fs", n > 1.0 ? "1/" : "",
229 n > 1.0 ? floor(n) : 1.0 / n);
234 static gchar *exif_build_formatted_Aperture(ExifData *exif)
238 n = exif_get_rational_as_double(exif, "Exif.Photo.FNumber");
239 if (n == 0.0) n = exif_get_rational_as_double(exif, "Exif.Photo.ApertureValue");
240 if (n == 0.0) return NULL;
242 return g_strdup_printf("f/%.1f", n);
245 static gchar *exif_build_formatted_ExposureBias(ExifData *exif)
251 r = exif_get_rational(exif, "Exif.Photo.ExposureBiasValue", &sign);
254 n = exif_rational_to_double(r, sign);
255 return g_strdup_printf("%+.1f", n);
258 static gchar *exif_build_formatted_FocalLength(ExifData *exif)
262 n = exif_get_rational_as_double(exif, "Exif.Photo.FocalLength");
263 if (n == 0.0) return NULL;
264 return g_strdup_printf("%.0f mm", n);
267 static gchar *exif_build_formatted_FocalLength35mmFilm(ExifData *exif)
272 if (exif_get_integer(exif, "Exif.Photo.FocalLengthIn35mmFilm", &n) && n != 0)
274 return g_strdup_printf("%d mm", n);
277 f = exif_get_rational_as_double(exif, "Exif.Photo.FocalLength");
278 c = get_crop_factor(exif);
280 if (f != 0.0 && c != 0.0)
282 return g_strdup_printf("%.0f mm", f * c);
288 static gchar *exif_build_formatted_ISOSpeedRating(ExifData *exif)
292 text = exif_get_data_as_text(exif, "Exif.Photo.ISOSpeedRatings");
293 /* kodak may set this instead */
294 if (!text) text = exif_get_data_as_text(exif, "Exif.Photo.ExposureIndex");
298 static gchar *exif_build_formatted_SubjectDistance(ExifData *exif)
304 r = exif_get_rational(exif, "Exif.Photo.SubjectDistance", &sign);
307 if ((long)r->num == (long)0xffffffff) return g_strdup(_("infinity"));
308 if ((long)r->num == 0) return g_strdup(_("unknown"));
310 n = exif_rational_to_double(r, sign);
311 if (n == 0.0) return _("unknown");
312 return g_strdup_printf("%.3f m", n);
315 static gchar *exif_build_formatted_Flash(ExifData *exif)
317 /* grr, flash is a bitmask... */
323 if (!exif_get_integer(exif, "Exif.Photo.Flash", &n)) return NULL;
325 /* Exif 2.1 only defines first 3 bits */
326 if (n <= 0x07) return exif_get_data_as_text(exif, "Exif.Photo.Flash");
328 /* must be Exif 2.2 */
329 string = g_string_new("");
331 /* flash fired (bit 0) */
332 string = g_string_append(string, (n & 0x01) ? _("yes") : _("no"));
334 /* flash mode (bits 3, 4) */
336 if (v) string = append_comma_text(string, _("mode:"));
340 string = g_string_append(string, _("on"));
343 string = g_string_append(string, _("off"));
346 string = g_string_append(string, _("auto"));
350 /* return light (bits 1, 2) */
352 if (v == 2) string = append_comma_text(string, _("not detected by strobe"));
353 if (v == 3) string = append_comma_text(string, _("detected by strobe"));
355 /* we ignore flash function (bit 5) */
357 /* red-eye (bit 6) */
358 if ((n >> 5) & 0x01) string = append_comma_text(string, _("red-eye reduction"));
361 g_string_free(string, FALSE);
365 static gchar *exif_build_formatted_Resolution(ExifData *exif)
367 ExifRational *rx, *ry;
371 rx = exif_get_rational(exif, "Exif.Image.XResolution", NULL);
372 ry = exif_get_rational(exif, "Exif.Image.YResolution", NULL);
373 if (!rx || !ry) return NULL;
375 units = exif_get_data_as_text(exif, "Exif.Image.ResolutionUnit");
376 text = g_strdup_printf("%0.f x %0.f (%s/%s)", rx->den ? (double)rx->num / rx->den : 1.0,
377 ry->den ? (double)ry->num / ry->den : 1.0,
378 _("dot"), (units) ? units : _("unknown"));
384 static gchar *exif_build_formatted_ColorProfile(ExifData *exif)
386 const gchar *name = "";
387 const gchar *source = "";
388 unsigned char *profile_data;
391 profile_data = exif_get_color_profile(exif, &profile_len);
395 gchar *interop_index;
397 /* ColorSpace == 1 specifies sRGB per EXIF 2.2 */
398 if (!exif_get_integer(exif, "Exif.Photo.ColorSpace", &cs)) cs = 0;
399 interop_index = exif_get_data_as_text(exif, "Exif.Iop.InteroperabilityIndex");
404 source = "ColorSpace";
406 else if (cs == 2 || (interop_index && !strcmp(interop_index, "R03")))
408 name = _("AdobeRGB");
409 source = (cs == 2) ? "ColorSpace" : "Iop";
412 g_free(interop_index);
416 source = _("embedded");
422 profile = cmsOpenProfileFromMem(profile_data, profile_len);
425 name = cmsTakeProductName(profile);
426 cmsCloseProfile(profile);
428 g_free(profile_data);
432 if (name[0] == 0 && source[0] == 0) return NULL;
433 return g_strdup_printf("%s (%s)", name, source);
437 /* List of custom formatted pseudo-exif tags */
438 #define EXIF_FORMATTED_TAG(name, label) { "formatted."#name, label, exif_build_formatted##_##name }
440 ExifFormattedText ExifFormattedList[] = {
441 EXIF_FORMATTED_TAG(Camera, N_("Camera")),
442 EXIF_FORMATTED_TAG(DateTime, N_("Date")),
443 EXIF_FORMATTED_TAG(ShutterSpeed, N_("Shutter speed")),
444 EXIF_FORMATTED_TAG(Aperture, N_("Aperture")),
445 EXIF_FORMATTED_TAG(ExposureBias, N_("Exposure bias")),
446 EXIF_FORMATTED_TAG(ISOSpeedRating, N_("ISO sensitivity")),
447 EXIF_FORMATTED_TAG(FocalLength, N_("Focal length")),
448 EXIF_FORMATTED_TAG(FocalLength35mmFilm, N_("Focal length 35mm")),
449 EXIF_FORMATTED_TAG(SubjectDistance, N_("Subject distance")),
450 EXIF_FORMATTED_TAG(Flash, N_("Flash")),
451 EXIF_FORMATTED_TAG(Resolution, N_("Resolution")),
452 EXIF_FORMATTED_TAG(ColorProfile, N_("Color profile")),
456 gchar *exif_get_formatted_by_key(ExifData *exif, const gchar *key, gint *key_valid)
458 if (strncmp(key, "formatted.", 10) == 0)
462 if (key_valid) *key_valid = TRUE;
465 for (i = 0; ExifFormattedList[i].key; i++)
466 if (strcmp(key, ExifFormattedList[i].key + 10) == 0)
467 return ExifFormattedList[i].build_func(exif);
470 if (key_valid) *key_valid = FALSE;
474 const gchar *exif_get_description_by_key(const gchar *key)
478 if (!key) return NULL;
480 if (strncmp(key, "formatted.", 10) == 0)
483 for (i = 0; ExifFormattedList[i].key; i++)
484 if (strcmp(key, ExifFormattedList[i].key + 10) == 0)
485 return _(ExifFormattedList[i].description);
488 return exif_get_tag_description_by_key(key);
491 gint exif_get_integer(ExifData *exif, const gchar *key, gint *value)
495 item = exif_get_item(exif, key);
496 return exif_item_get_integer(item, value);
499 ExifRational *exif_get_rational(ExifData *exif, const gchar *key, gint *sign)
503 item = exif_get_item(exif, key);
504 return exif_item_get_rational(item, sign);
507 gchar *exif_get_data_as_text(ExifData *exif, const gchar *key)
513 if (!key) return NULL;
515 text = exif_get_formatted_by_key(exif, key, &key_valid);
516 if (key_valid) return text;
518 item = exif_get_item(exif, key);
519 if (item) return exif_item_get_data_as_text(item);
525 static FileCacheData *exif_cache;
527 void exif_release_cb(FileData *fd)
533 ExifData *exif_read_fd(FileData *fd)
535 gchar *sidecar_path = NULL;
537 if (!fd) return NULL;
539 if (!exif_cache) exif_cache = file_cache_new(exif_release_cb, 4);
541 if (file_cache_get(exif_cache, fd)) return fd->exif;
543 if (filter_file_class(fd->extension, FORMAT_CLASS_RAWIMAGE))
547 work = fd->parent ? fd->parent->sidecar_files : fd->sidecar_files;
550 FileData *sfd = work->data;
552 if (strcasecmp(sfd->extension, ".xmp") == 0)
554 sidecar_path = sfd->path;
561 fd->exif = exif_read(fd->path, sidecar_path);
565 void exif_free_fd(FileData *fd, ExifData *exif)
568 g_assert(fd->exif == exif);
570 file_cache_put(exif_cache, fd, 1);
573 /* embedded icc in jpeg */
576 #define JPEG_MARKER 0xFF
577 #define JPEG_MARKER_SOI 0xD8
578 #define JPEG_MARKER_EOI 0xD9
579 #define JPEG_MARKER_APP1 0xE1
580 #define JPEG_MARKER_APP2 0xE2
582 /* jpeg container format:
583 all data markers start with 0XFF
584 2 byte long file start and end markers: 0xFFD8(SOI) and 0XFFD9(EOI)
585 4 byte long data segment markers in format: 0xFFTTSSSSNNN...
586 FF: 1 byte standard marker identifier
588 SSSS: 2 bytes in Motorola byte alignment for length of the data.
589 This value includes these 2 bytes in the count, making actual
590 length of NN... == SSSS - 2.
591 NNN.: the data in this segment
594 gint exif_jpeg_segment_find(unsigned char *data, guint size,
595 guchar app_marker, const gchar *magic, guint magic_len,
596 guint *seg_offset, guint *seg_length)
602 while (marker != app_marker &&
603 marker != JPEG_MARKER_EOI)
608 if (offset + 2 >= size ||
609 data[offset] != JPEG_MARKER) return FALSE;
611 marker = data[offset + 1];
612 if (marker != JPEG_MARKER_SOI &&
613 marker != JPEG_MARKER_EOI)
615 if (offset + 4 >= size) return FALSE;
616 length += ((guint)data[offset + 2] << 8) + data[offset + 3];
620 if (marker == app_marker &&
621 offset + length < size &&
622 length >= 4 + magic_len &&
623 memcmp(data + offset + 4, magic, magic_len) == 0)
625 *seg_offset = offset + 4;
626 *seg_length = length - 4;
633 gint exif_jpeg_parse_color(ExifData *exif, unsigned char *data, guint size)
635 guint seg_offset = 0;
636 guint seg_length = 0;
637 guint chunk_offset[255];
638 guint chunk_length[255];
639 guint chunk_count = 0;
641 /* For jpeg/jfif, ICC color profile data can be in more than one segment.
642 the data is in APP2 data segments that start with "ICC_PROFILE\x00\xNN\xTT"
643 NN = segment number for data
644 TT = total number of ICC segments (TT in each ICC segment should match)
647 while (exif_jpeg_segment_find(data + seg_offset + seg_length,
648 size - seg_offset - seg_length,
650 "ICC_PROFILE\x00", 12,
651 &seg_offset, &seg_length))
656 if (seg_length < 14) return FALSE;
658 chunk_num = data[seg_offset + 12];
659 chunk_tot = data[seg_offset + 13];
661 if (chunk_num == 0 || chunk_tot == 0) return FALSE;
663 if (chunk_count == 0)
667 chunk_count = (guint)chunk_tot;
668 for (i = 0; i < chunk_count; i++) chunk_offset[i] = 0;
669 for (i = 0; i < chunk_count; i++) chunk_length[i] = 0;
672 if (chunk_tot != chunk_count ||
673 chunk_num > chunk_count) return FALSE;
676 chunk_offset[chunk_num] = seg_offset + 14;
677 chunk_length[chunk_num] = seg_length - 14;
682 unsigned char *cp_data;
686 for (i = 0; i < chunk_count; i++) cp_length += chunk_length[i];
687 cp_data = g_malloc(cp_length);
689 for (i = 0; i < chunk_count; i++)
691 if (chunk_offset[i] == 0)
693 /* error, we never saw this chunk */
697 memcpy(cp_data, data + chunk_offset[i], chunk_length[i]);
699 DEBUG_1("Found embedded icc profile in jpeg");
700 exif_add_jpeg_color_profile(exif, cp_data, cp_length);