/* exif-entry.c * * Copyright © 2001 Lutz Müller * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ #include #include #include #include #include #include #include #include #include #include #include struct _ExifEntryPrivate { unsigned int ref_count; ExifMem *mem; }; /* This function is hidden in exif-data.c */ ExifLog *exif_data_get_log (ExifData *); static void exif_entry_log (ExifEntry *e, ExifLogCode code, const char *format, ...) { va_list args; ExifLog *l = NULL; if (e && e->parent && e->parent->parent) l = exif_data_get_log (e->parent->parent); va_start (args, format); exif_logv (l, code, "ExifEntry", format, args); va_end (args); } static void * exif_entry_alloc (ExifEntry *e, unsigned int i) { void *d; ExifLog *l = NULL; if (!e || !e->priv || !i) return NULL; d = exif_mem_alloc (e->priv->mem, i); if (d) return d; if (e->parent && e->parent->parent) l = exif_data_get_log (e->parent->parent); EXIF_LOG_NO_MEMORY (l, "ExifEntry", i); return NULL; } static void * exif_entry_realloc (ExifEntry *e, void *d_orig, unsigned int i) { void *d; ExifLog *l = NULL; if (!e || !e->priv) return NULL; if (!i) { exif_mem_free (e->priv->mem, d_orig); return NULL; } d = exif_mem_realloc (e->priv->mem, d_orig, i); if (d) return d; if (e->parent && e->parent->parent) l = exif_data_get_log (e->parent->parent); EXIF_LOG_NO_MEMORY (l, "ExifEntry", i); return NULL; } ExifEntry * exif_entry_new (void) { ExifMem *mem = exif_mem_new_default (); ExifEntry *e = exif_entry_new_mem (mem); exif_mem_unref (mem); return e; } ExifEntry * exif_entry_new_mem (ExifMem *mem) { ExifEntry *e = NULL; e = exif_mem_alloc (mem, sizeof (ExifEntry)); if (!e) return NULL; e->priv = exif_mem_alloc (mem, sizeof (ExifEntryPrivate)); if (!e->priv) { exif_mem_free (mem, e); return NULL; } e->priv->ref_count = 1; e->priv->mem = mem; exif_mem_ref (mem); return e; } void exif_entry_ref (ExifEntry *e) { if (!e) return; e->priv->ref_count++; } void exif_entry_unref (ExifEntry *e) { if (!e) return; e->priv->ref_count--; if (!e->priv->ref_count) exif_entry_free (e); } void exif_entry_free (ExifEntry *e) { if (!e) return; if (e->priv) { ExifMem *mem = e->priv->mem; if (e->data) exif_mem_free (mem, e->data); exif_mem_free (mem, e->priv); exif_mem_free (mem, e); exif_mem_unref (mem); } } void exif_entry_fix (ExifEntry *e) { unsigned int i; ExifByteOrder o; ExifRational r; ExifSRational sr; if (!e || !e->priv) return; switch (e->tag) { /* These tags all need to be of format SHORT. */ case EXIF_TAG_YCBCR_SUB_SAMPLING: case EXIF_TAG_SUBJECT_AREA: case EXIF_TAG_COLOR_SPACE: case EXIF_TAG_PLANAR_CONFIGURATION: case EXIF_TAG_SENSING_METHOD: case EXIF_TAG_ORIENTATION: case EXIF_TAG_YCBCR_POSITIONING: case EXIF_TAG_PHOTOMETRIC_INTERPRETATION: case EXIF_TAG_CUSTOM_RENDERED: case EXIF_TAG_EXPOSURE_MODE: case EXIF_TAG_WHITE_BALANCE: case EXIF_TAG_SCENE_CAPTURE_TYPE: case EXIF_TAG_GAIN_CONTROL: case EXIF_TAG_SATURATION: case EXIF_TAG_CONTRAST: case EXIF_TAG_SHARPNESS: switch (e->format) { case EXIF_FORMAT_LONG: if (!e->parent || !e->parent->parent) break; o = exif_data_get_byte_order (e->parent->parent); for (i = 0; i < e->components; i++) exif_set_short ( e->data + i * exif_format_get_size ( EXIF_FORMAT_SHORT), o, (ExifShort) exif_get_long ( e->data + i * exif_format_get_size ( EXIF_FORMAT_LONG), o)); e->format = EXIF_FORMAT_SHORT; e->size = e->components * exif_format_get_size (e->format); e->data = exif_entry_realloc (e, e->data, e->size); exif_entry_log (e, EXIF_LOG_CODE_DEBUG, "Tag '%s' was of format '%s' (which is " "against specification) and has been " "changed to format '%s'.", exif_tag_get_name (e->tag), exif_format_get_name (EXIF_FORMAT_LONG), exif_format_get_name (EXIF_FORMAT_SHORT)); break; case EXIF_FORMAT_SHORT: default: break; } break; /* All these tags need to be of format 'Rational'. */ case EXIF_TAG_FNUMBER: case EXIF_TAG_APERTURE_VALUE: case EXIF_TAG_EXPOSURE_TIME: case EXIF_TAG_FOCAL_LENGTH: switch (e->format) { case EXIF_FORMAT_SRATIONAL: if (!e->parent || !e->parent->parent) break; o = exif_data_get_byte_order (e->parent->parent); for (i = 0; i < e->components; i++) { sr = exif_get_srational (e->data + i * exif_format_get_size ( EXIF_FORMAT_SRATIONAL), o); r.numerator = (ExifLong) sr.numerator; r.denominator = (ExifLong) sr.denominator; exif_set_rational (e->data + i * exif_format_get_size ( EXIF_FORMAT_RATIONAL), o, r); } e->format = EXIF_FORMAT_RATIONAL; exif_entry_log (e, EXIF_LOG_CODE_DEBUG, "Tag '%s' was of format '%s' (which is " "against specification) and has been " "changed to format '%s'.", exif_tag_get_name (e->tag), exif_format_get_name (EXIF_FORMAT_SRATIONAL), exif_format_get_name (EXIF_FORMAT_RATIONAL)); break; default: break; } break; case EXIF_TAG_USER_COMMENT: /* Format needs to be UNDEFINED. */ if (e->format != EXIF_FORMAT_UNDEFINED) { exif_entry_log (e, EXIF_LOG_CODE_DEBUG, "Tag 'UserComment' had invalid format '%s'. " "Format has been set to 'undefined'.", exif_format_get_name (e->format)); e->format = EXIF_FORMAT_UNDEFINED; } /* Some packages like Canon ZoomBrowser EX 4.5 store only one zero byte followed by 7 bytes of rubbish */ if ((e->size >= 8) && (e->data[0] == 0)) { memcpy(e->data, "\0\0\0\0\0\0\0\0", 8); } /* Some cameras fill the tag with '\0' or ' '. */ for (i = 0; i < e->size && (!e->data[i] || (e->data[i] == ' ')); i++); if (i && (i == e->size)) { exif_entry_log (e, EXIF_LOG_CODE_DEBUG, "Tag 'UserComment' contained unnecessary " "data which has been removed."); exif_mem_free (e->priv->mem, e->data); e->data = NULL; e->size = 0; e->components = 0; } /* There need to be at least 8 bytes. */ if (e->size < 8) { e->data = exif_entry_realloc (e, e->data, 8 + e->size); if (!e->data) { e->size = 0; e->components = 0; return; } /* Assume ASCII */ memmove (e->data + 8, e->data, e->size); memcpy (e->data, "ASCII\0\0\0", 8); e->size += 8; e->components += 8; exif_entry_log (e, EXIF_LOG_CODE_DEBUG, "Tag 'UserComment' has been expanded to at " "least 8 bytes in order to follow the " "specification."); break; } /* * If the first 8 bytes are empty and real data starts * afterwards, let's assume ASCII and claim the 8 first * bytes for the format specifyer. */ if (i >= 8) { exif_entry_log (e, EXIF_LOG_CODE_DEBUG, "Tag 'UserComment' did not start with " "format identifyer. This has been fixed."); memcpy (e->data, "ASCII\0\0\0", 8); } /* First 8 bytes need to follow the specification. */ if (memcmp (e->data, "ASCII\0\0\0" , 8) && memcmp (e->data, "UNICODE\0" , 8) && memcmp (e->data, "JIS\0\0\0\0\0" , 8) && memcmp (e->data, "\0\0\0\0\0\0\0\0", 8)) { e->data = exif_entry_realloc (e, e->data, 8 + e->size); if (!e->data) { e->size = 0; e->components = 0; break; } /* Assume ASCII */ memmove (e->data + 8, e->data, e->size); memcpy (e->data, "ASCII\0\0\0", 8); e->size += 8; e->components += 8; exif_entry_log (e, EXIF_LOG_CODE_DEBUG, "Tag 'UserComment' did not start with " "format identifyer. This has been fixed."); break; } break; default: break; } } void exif_entry_dump (ExifEntry *e, unsigned int indent) { char buf[1024]; char value[1024]; unsigned int i; for (i = 0; i < 2 * indent; i++) buf[i] = ' '; buf[i] = '\0'; if (!e) return; printf ("%sTag: 0x%x ('%s')\n", buf, e->tag, exif_tag_get_name (e->tag)); printf ("%s Format: %i ('%s')\n", buf, e->format, exif_format_get_name (e->format)); printf ("%s Components: %i\n", buf, (int) e->components); printf ("%s Size: %i\n", buf, e->size); printf ("%s Value: %s\n", buf, exif_entry_get_value (e, value, sizeof(value))); } #define CF(entry,target,v,maxlen) \ { \ if (entry->format != target) { \ exif_entry_log (entry, EXIF_LOG_CODE_CORRUPT_DATA, \ _("The tag '%s' contains data of an invalid " \ "format ('%s', expected '%s')."), \ exif_tag_get_name (entry->tag), \ exif_format_get_name (entry->format), \ exif_format_get_name (target)); \ break; \ } \ } #define CC(entry,target,v,maxlen) \ { \ if (entry->components != target) { \ exif_entry_log (entry, EXIF_LOG_CODE_CORRUPT_DATA, \ _("The tag '%s' contains an invalid number of " \ "components (%i, expected %i)."), \ exif_tag_get_name (entry->tag), \ (int) entry->components, (int) target); \ break; \ } \ } static struct { ExifTag tag; const char *strings[10]; } list[] = { { EXIF_TAG_PLANAR_CONFIGURATION, { N_("chunky format"), N_("planar format"), NULL}}, { EXIF_TAG_SENSING_METHOD, { "", N_("Not defined"), N_("One-chip color area sensor"), N_("Two-chip color area sensor"), N_("Three-chip color area sensor"), N_("Color sequential area sensor"), "", N_("Trilinear sensor"), N_("Color sequential linear sensor"), NULL}}, { EXIF_TAG_ORIENTATION, { "", N_("top - left"), N_("top - right"), N_("bottom - right"), N_("bottom - left"), N_("left - top"), N_("right - top"), N_("right - bottom"), N_("left - bottom"), NULL}}, { EXIF_TAG_YCBCR_POSITIONING, { "", N_("centered"), N_("co-sited"), NULL}}, { EXIF_TAG_PHOTOMETRIC_INTERPRETATION, {"", N_("RGB"), N_("YCbCr"), NULL}}, { EXIF_TAG_CUSTOM_RENDERED, { N_("Normal process"), N_("Custom process"), NULL}}, { EXIF_TAG_EXPOSURE_MODE, { N_("Auto exposure"), N_("Manual exposure"), N_("Auto bracket"), NULL}}, { EXIF_TAG_WHITE_BALANCE, { N_("Auto white balance"), N_("Manual white balance"), NULL}}, { EXIF_TAG_SCENE_CAPTURE_TYPE, { N_("Standard"), N_("Landscape"), N_("Portrait"), N_("Night scene"), NULL}}, { EXIF_TAG_GAIN_CONTROL, { N_("Normal"), N_("Low gain up"), N_("High gain up"), N_("Low gain down"), N_("High gain down"), NULL}}, { EXIF_TAG_SATURATION, { N_("Normal"), N_("Low saturation"), N_("High saturation"), NULL}}, { EXIF_TAG_CONTRAST , {N_("Normal"), N_("Soft"), N_("Hard"), NULL}}, { EXIF_TAG_SHARPNESS, {N_("Normal"), N_("Soft"), N_("Hard"), NULL}}, { 0, {NULL}} }; static struct { ExifTag tag; struct { int index; const char *values[4]; } elem[25]; } list2[] = { { EXIF_TAG_METERING_MODE, { { 0, {N_("Unknown"), NULL}}, { 1, {N_("Average"), N_("avg"), NULL}}, { 2, {N_("Center-Weighted Average"), N_("Center-Weight"), NULL}}, { 3, {N_("Spot"), NULL}}, { 4, {N_("Multi Spot"), NULL}}, { 5, {N_("Pattern"), NULL}}, { 6, {N_("Partial"), NULL}}, {255, {N_("Other"), NULL}}, { 0, {NULL}}}}, { EXIF_TAG_COMPRESSION, { {1, {N_("Uncompressed"), NULL}}, {5, {N_("LZW compression"), NULL}}, {6, {N_("JPEG compression"), NULL}}, {0, {NULL}}}}, { EXIF_TAG_LIGHT_SOURCE, { { 0, {N_("Unknown"), NULL}}, { 1, {N_("Daylight"), NULL}}, { 2, {N_("Fluorescent"), NULL}}, { 3, {N_("Tungsten incandescent light"), N_("Tungsten"), NULL}}, { 4, {N_("Flash"), NULL}}, { 9, {N_("Fine weather"), NULL}}, { 10, {N_("Cloudy weather"), N_("cloudy"), NULL}}, { 11, {N_("Shade"), NULL}}, { 12, {N_("Daylight fluorescent"), NULL}}, { 13, {N_("Day white fluorescent"), NULL}}, { 14, {N_("Cool white fluorescent"), NULL}}, { 15, {N_("White fluorescent"), NULL}}, { 17, {N_("Standard light A"), NULL}}, { 18, {N_("Standard light B"), NULL}}, { 19, {N_("Standard light C"), NULL}}, { 20, {N_("D55"), NULL}}, { 21, {N_("D65"), NULL}}, { 22, {N_("D75"), NULL}}, { 24, {N_("ISO studio tungsten"),NULL}}, {255, {N_("Other"), NULL}}, { 0, {NULL}}}}, { EXIF_TAG_FOCAL_PLANE_RESOLUTION_UNIT, { {2, {N_("Inch"), N_("in"), NULL}}, {3, {N_("Centimeter"), N_("cm"), NULL}}, {0, {NULL}}}}, { EXIF_TAG_RESOLUTION_UNIT, { {2, {N_("Inch"), N_("in"), NULL}}, {3, {N_("Centimeter"), N_("cm"), NULL}}, {0, {NULL}}}}, { EXIF_TAG_EXPOSURE_PROGRAM, { {0, {N_("Not defined"), NULL}}, {1, {N_("Manual"), NULL}}, {2, {N_("Normal program"), N_("Normal"), NULL}}, {3, {N_("Aperture priority"), N_("Aperture"), NULL}}, {4, {N_("Shutter priority"),N_("Shutter"), NULL}}, {5, {N_("Creative program (biased toward depth of field)"), N_("Creative"), NULL}}, {6, {N_("Creative program (biased toward fast shutter speed"), N_("Action"), NULL}}, {7, {N_("Portrait mode (for closeup photos with the background out " "of focus)"), N_("Portrait"), NULL}}, {8, {N_("Landscape mode (for landscape photos with the background " "in focus)"), N_("Landscape"), NULL}}, {0, {NULL}}}}, { EXIF_TAG_FLASH, { {0x0000, {N_("Flash did not fire."), N_("no flash"), NULL}}, {0x0001, {N_("Flash fired."), N_("flash"), N_("Yes"), NULL}}, {0x0005, {N_("Strobe return light not detected."), N_("W/o strobe"), NULL}}, {0x0007, {N_("Strobe return light detected."), N_("W. strobe"), NULL}}, {0x0009, {N_("Flash fired, compulsatory flash mode"), NULL}}, {0x000d, {N_("Flash fired, compulsatory flash mode, return light " "not detected."), NULL}}, {0x000f, {N_("Flash fired, compulsatory flash mode, return light " "detected."), NULL}}, {0x0010, {N_("Flash did not fire, compulsatory flash mode."), NULL}}, {0x0018, {N_("Flash did not fire, auto mode."), NULL}}, {0x0019, {N_("Flash fired, auto mode."), NULL}}, {0x001d, {N_("Flash fired, auto mode, return light not detected."), NULL}}, {0x001f, {N_("Flash fired, auto mode, return light detected."), NULL}}, {0x0020, {N_("No flash function."),NULL}}, {0x0041, {N_("Flash fired, red-eye reduction mode."), NULL}}, {0x0045, {N_("Flash fired, red-eye reduction mode, return light " "not detected."), NULL}}, {0x0047, {N_("Flash fired, red-eye reduction mode, return light " "detected."), NULL}}, {0x0049, {N_("Flash fired, compulsory flash mode, red-eye reduction " "mode."), NULL}}, {0x004d, {N_("Flash fired, compulsory flash mode, red-eye reduction " "mode, return light not detected"), NULL}}, {0x004f, {N_("Flash fired, compulsory flash mode, red-eye reduction, " "return light detected"), NULL}}, {0x0058, {N_("Flash did not fire, auto mode, red-eye reduction mode"), NULL}}, {0x0059, {N_("Flash fired, auto mode, red-eye reduction mode"), NULL}}, {0x005d, {N_("Flash fired, auto mode, return light not detected, " "red-eye reduction mode."), NULL}}, {0x005f, {N_("Flash fired, auto mode, return light detected, " "red-eye reduction mode."), NULL}}, {0x0000, {NULL}}}}, {EXIF_TAG_SUBJECT_DISTANCE_RANGE, { {0, {N_("Unknown"), N_("?"), NULL}}, {1, {N_("Macro"), NULL}}, {2, {N_("Close view"), N_("close"), NULL}}, {3, {N_("Distant view"), N_("distant"), NULL}}, {0, {NULL}}}}, { EXIF_TAG_COLOR_SPACE, { {1, {N_("sRGB"), NULL}}, {0xffff, {N_("Uncalibrated"), NULL}}}}, {0, } }; const char * exif_entry_get_value (ExifEntry *e, char *val, unsigned int maxlen) { unsigned int i, j, k, l, ts; const unsigned char *t; ExifByte v_byte; ExifShort v_short, v_short2, v_short3, v_short4; ExifLong v_long; ExifSLong v_slong; ExifRational v_rat; ExifSRational v_srat; char b[64]; const char *c; ExifByteOrder o; double d; ExifEntry *entry; static struct { char *label; char major, minor; } versions[] = { {"0110", 1, 1}, {"0120", 1, 2}, {"0200", 2, 0}, {"0210", 2, 1}, {"0220", 2, 2}, {"0221", 2, 21}, {NULL , 0, 0} }; /* FIXME: This belongs to somewhere else. */ bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8"); bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR); /* We need the byte order */ if (!e || !e->parent || !e->parent->parent) return val; o = exif_data_get_byte_order (e->parent->parent); memset (val, 0, maxlen); memset (b, 0, sizeof (b)); maxlen--; /* Sanity check */ if (e->size != e->components * exif_format_get_size (e->format)) { snprintf (val, maxlen, _("Invalid size of entry (%i, " "expected %li x %i)."), e->size, e->components, exif_format_get_size (e->format)); return val; } switch (e->tag) { case EXIF_TAG_USER_COMMENT: /* * The specification says UNDEFINED, but some * manufacturers don't care and use ASCII. If this is the * case here, only refuse to read it if there is no chance * of finding readable data. */ if ((e->format != EXIF_FORMAT_ASCII) || (e->size <= 8) || ( memcmp (e->data, "ASCII\0\0\0" , 8) && memcmp (e->data, "UNICODE\0" , 8) && memcmp (e->data, "JIS\0\0\0\0\0", 8) && memcmp (e->data, "\0\0\0\0\0\0\0\0", 8))) CF (e, EXIF_FORMAT_UNDEFINED, val, maxlen); /* * Note that, according to the specification (V2.1, p 40), * the user comment field does not have to be * NULL terminated. */ if ((e->size >= 8) && !memcmp (e->data, "ASCII\0\0\0", 8)) { strncpy (val, (char *) e->data + 8, MIN (e->size - 8, maxlen)); break; } if ((e->size >= 8) && !memcmp (e->data, "UNICODE\0", 8)) { strncpy (val, _("Unsupported UNICODE string"), maxlen); break; } if ((e->size >= 8) && !memcmp (e->data, "JIS\0\0\0\0\0", 8)) { strncpy (val, _("Unsupported JIS string"), maxlen); break; } /* Check if there is really some information in the tag. */ for (i = 0; (i < e->size) && (!e->data[i] || (e->data[i] == ' ')); i++); if (i == e->size) break; /* * If we reach this point, the tag does not * comply with the standard and seems to contain data. * Print as much as possible. */ exif_entry_log (e, EXIF_LOG_CODE_DEBUG, "Tag UserComment does not comply " "with standard but contains data."); for (; (i < e->size) && (strlen (val) < maxlen - 1); i++) { exif_entry_log (e, EXIF_LOG_CODE_DEBUG, "Byte at position %i: 0x%02x", i, e->data[i]); val[strlen (val)] = isprint (e->data[i]) ? e->data[i] : '.'; } break; case EXIF_TAG_EXIF_VERSION: CF (e, EXIF_FORMAT_UNDEFINED, val, maxlen); CC (e, 4, val, maxlen); strncpy (val, _("Unknown Exif Version"), maxlen); for (i = 0; versions[i].label; i++) { if (!memcmp (e->data, versions[i].label, 4)) { snprintf (val, maxlen, _("Exif Version %d.%d"), versions[i].major, versions[i].minor); break; } } break; case EXIF_TAG_FLASH_PIX_VERSION: CF (e, EXIF_FORMAT_UNDEFINED, val, maxlen); CC (e, 4, val, maxlen); if (!memcmp (e->data, "0100", 4)) strncpy (val, _("FlashPix Version 1.0"), maxlen); else if (!memcmp (e->data, "0101", 4)) strncpy (val, _("FlashPix Version 1.01"), maxlen); else strncpy (val, _("Unknown FlashPix Version"), maxlen); break; case EXIF_TAG_COPYRIGHT: CF (e, EXIF_FORMAT_ASCII, val, maxlen); /* * First part: Photographer. * Some cameras store a string like " " here. Ignore it. */ if (e->size && e->data && (strspn (e->data, " ") != strlen ((char *) e->data))) strncpy (val, (char *) e->data, MIN (maxlen, e->size)); else strncpy (val, _("[None]"), maxlen); strncat (val, " ", maxlen - strlen (val)); strncat (val, _("(Photographer)"), maxlen - strlen (val)); /* Second part: Editor. */ t = e->data + strlen ((char *) e->data) + 1; ts = e->data + e->size - t; strncat (val, " - ", maxlen - strlen (val)); if (e->size && e->data && (ts > 0) && (strspn (t, " ") != ts)) strncat (val, t, MIN (maxlen - strlen (val), ts)); else strncat (val, _("[None]"), maxlen - strlen (val)); strncat (val, " ", maxlen - strlen (val)); strncat (val, _("(Editor)"), maxlen - strlen (val)); break; case EXIF_TAG_FNUMBER: CF (e, EXIF_FORMAT_RATIONAL, val, maxlen); CC (e, 1, val, maxlen); v_rat = exif_get_rational (e->data, o); if (!v_rat.denominator) return val; snprintf (val, maxlen, "f/%.01f", (float) v_rat.numerator / (float) v_rat.denominator); break; case EXIF_TAG_APERTURE_VALUE: CF (e, EXIF_FORMAT_RATIONAL, val, maxlen); CC (e, 1, val, maxlen); v_rat = exif_get_rational (e->data, o); if (!v_rat.denominator) return val; snprintf (val, maxlen, "f/%.01f", pow (2 , ((float) v_rat.numerator / (float) v_rat.denominator) / 2.)); break; case EXIF_TAG_FOCAL_LENGTH: CF (e, EXIF_FORMAT_RATIONAL, val, maxlen); CC (e, 1, val, maxlen); v_rat = exif_get_rational (e->data, o); if (!v_rat.denominator) return val; /* * For calculation of the 35mm equivalent, * Minolta cameras need a multiplier that depends on the * camera model. */ d = 0.; entry = exif_content_get_entry ( e->parent->parent->ifd[EXIF_IFD_0], EXIF_TAG_MAKE); if (entry && entry->data && !strncmp (entry->data, "Minolta", 7)) { entry = exif_content_get_entry ( e->parent->parent->ifd[EXIF_IFD_0], EXIF_TAG_MODEL); if (entry && entry->data) { if (!strncmp (entry->data, "DiMAGE 7", 8)) d = 3.9; else if (!strncmp (entry->data, "DiMAGE 5", 8)) d = 4.9; } } if (d) snprintf (b, sizeof (b), _(" (35 equivalent: %d mm)"), (int) (d * (double) v_rat.numerator / (double) v_rat.denominator)); snprintf (val, maxlen, "%.1f mm", (float) v_rat.numerator / (float) v_rat.denominator); if (maxlen > strlen (val) + strlen (b)) strncat (val, b, maxlen - strlen (val) - 1); break; case EXIF_TAG_SUBJECT_DISTANCE: CF (e, EXIF_FORMAT_RATIONAL, val, maxlen); CC (e, 1, val, maxlen); v_rat = exif_get_rational (e->data, o); if (!v_rat.denominator) return val; snprintf (val, maxlen, "%.1f m", (float) v_rat.numerator / (float) v_rat.denominator); break; case EXIF_TAG_EXPOSURE_TIME: CF (e, EXIF_FORMAT_RATIONAL, val, maxlen); CC (e, 1, val, maxlen); v_rat = exif_get_rational (e->data, o); if (!v_rat.denominator) return val; d = (double) v_rat.numerator / (double) v_rat.denominator; if (d < 1) snprintf (val, maxlen, _("1/%d"), (int) (1. / d)); else snprintf (val, maxlen, _("%d"), (int) d); if (maxlen > strlen (val) + strlen (_(" sec."))) strncat (val, _(" sec."), maxlen - strlen (val) - 1); break; case EXIF_TAG_SHUTTER_SPEED_VALUE: CF (e, EXIF_FORMAT_SRATIONAL, val, maxlen); CC (e, 1, val, maxlen); v_srat = exif_get_srational (e->data, o); if (!v_srat.denominator) return val; snprintf (val, maxlen, "%.0f/%.0f", (float) v_srat.numerator, (float) v_srat.denominator); if (maxlen > strlen (val) + strlen (_(" sec."))) strncat (val, _(" sec."), maxlen - strlen (val) - 1); snprintf (b, sizeof (b), " (APEX: %i)", (int) pow (sqrt(2), (float) v_srat.numerator / (float) v_srat.denominator)); if (maxlen > strlen (val) + strlen (b)) strncat (val, b, maxlen - strlen (val) - 1); break; case EXIF_TAG_BRIGHTNESS_VALUE: CF (e, EXIF_FORMAT_SRATIONAL, val, maxlen); CC (e, 1, val, maxlen); v_srat = exif_get_srational (e->data, o); snprintf (val, maxlen, "%i/%i", (int) v_srat.numerator, (int) v_srat.denominator); /* FIXME: How do I calculate the APEX value? */ break; case EXIF_TAG_FILE_SOURCE: CF (e, EXIF_FORMAT_UNDEFINED, val, maxlen); CC (e, 1, val, maxlen); switch (e->data[0]) { case 0x03: strncpy (val, _("DSC"), maxlen); break; default: snprintf (val, maxlen, "0x%02x", e->data[0]); break; } break; case EXIF_TAG_COMPONENTS_CONFIGURATION: CF (e, EXIF_FORMAT_UNDEFINED, val, maxlen); CC (e, 4, val, maxlen); for (i = 0; i < 4; i++) { switch (e->data[i]) { case 0: c = _("-"); break; case 1: c = _("Y"); break; case 2: c = _("Cb"); break; case 3: c = _("Cr"); break; case 4: c = _("R"); break; case 5: c = _("G"); break; case 6: c = _("B"); break; default: c = _("reserved"); break; } strncat (val, c, maxlen - strlen (val)); if (i < 3) strncat (val, " ", maxlen - strlen (val)); } break; case EXIF_TAG_EXPOSURE_BIAS_VALUE: CF (e, EXIF_FORMAT_SRATIONAL, val, maxlen); CC (e, 1, val, maxlen); v_srat = exif_get_srational (e->data, o); if (!v_srat.denominator) return val; snprintf (val, maxlen, "%s%.01f", v_srat.denominator * v_srat.numerator > 0 ? "+" : "", (double) v_srat.numerator / (double) v_srat.denominator); break; case EXIF_TAG_YCBCR_SUB_SAMPLING: CF (e, EXIF_FORMAT_SHORT, val, maxlen); CC (e, 2, val, maxlen); v_short = exif_get_short (e->data, o); v_short2 = exif_get_short ( e->data + exif_format_get_size (e->format), o); if ((v_short == 2) && (v_short2 == 1)) strncpy (val, _("YCbCr4:2:2"), maxlen); else if ((v_short == 2) && (v_short2 == 2)) strncpy (val, _("YCbCr4:2:0"), maxlen); else snprintf (val, maxlen, "%i, %i", v_short, v_short2); break; case EXIF_TAG_MAKER_NOTE: CF (e, EXIF_FORMAT_UNDEFINED, val, maxlen); snprintf (val, maxlen, _("%i bytes unknown data"), (int) e->components); break; case EXIF_TAG_SUBJECT_AREA: CF (e, EXIF_FORMAT_SHORT, val, maxlen); switch (e->components) { case 2: v_short = exif_get_short (e->data, o); v_short2 = exif_get_short (e->data + 2, o); snprintf (val, maxlen, "(x,y) = (%i,%i)", v_short, v_short2); break; case 3: v_short = exif_get_short (e->data, o); v_short2 = exif_get_short (e->data + 2, o); v_short3 = exif_get_short (e->data + 4, o); snprintf (val, maxlen, _("Within distance %i of " "(x,y) = (%i,%i)"), v_short3, v_short, v_short2); break; case 4: v_short = exif_get_short (e->data, o); v_short2 = exif_get_short (e->data + 2, o); v_short3 = exif_get_short (e->data + 4, o); v_short4 = exif_get_short (e->data + 6, o); snprintf (val, maxlen, _("Within rectangle " "(width %i, height %i) around " "(x,y) = (%i,%i)"), v_short3, v_short4, v_short, v_short2); break; default: snprintf (val, maxlen, _("Unexpected number " "of components (%li, expected 2, 3, or 4)."), e->components); } break; case EXIF_TAG_METERING_MODE: case EXIF_TAG_COMPRESSION: case EXIF_TAG_FOCAL_PLANE_RESOLUTION_UNIT: case EXIF_TAG_RESOLUTION_UNIT: case EXIF_TAG_EXPOSURE_PROGRAM: case EXIF_TAG_FLASH: case EXIF_TAG_SUBJECT_DISTANCE_RANGE: case EXIF_TAG_COLOR_SPACE: CF (e,EXIF_FORMAT_SHORT, val, maxlen); CC (e, 1, val, maxlen); v_short = exif_get_short (e->data, o); /* Search the tag */ for (i = 0; list2[i].tag && (list2[i].tag != e->tag); i++); if (!list2[i].tag) { strncpy (val, "Internal error.", maxlen - 1); break; } /* Find the value */ for (j = 0; list2[i].elem[j].values && (list2[i].elem[j].index < v_short); j++); if (list2[i].elem[j].index != v_short) { snprintf (val, maxlen, "Internal error (unknown " "value %i).", v_short); break; } /* Find a short enough value */ memset (val, 0, maxlen); for (k = 0; list2[i].elem[j].values && list2[i].elem[j].values[k]; k++) { l = strlen (_(list2[i].elem[j].values[k])); if ((maxlen > l) && (strlen (val) < l)) strncpy (val, _(list2[i].elem[j].values[k]), maxlen - 1); } if (!strlen (val)) snprintf (val, maxlen, "%i", v_short); break; case EXIF_TAG_PLANAR_CONFIGURATION: case EXIF_TAG_SENSING_METHOD: case EXIF_TAG_ORIENTATION: case EXIF_TAG_YCBCR_POSITIONING: case EXIF_TAG_PHOTOMETRIC_INTERPRETATION: case EXIF_TAG_CUSTOM_RENDERED: case EXIF_TAG_EXPOSURE_MODE: case EXIF_TAG_WHITE_BALANCE: case EXIF_TAG_SCENE_CAPTURE_TYPE: case EXIF_TAG_GAIN_CONTROL: case EXIF_TAG_SATURATION: case EXIF_TAG_CONTRAST: case EXIF_TAG_SHARPNESS: CF (e, EXIF_FORMAT_SHORT, val, maxlen); CC (e, 1, val, maxlen); v_short = exif_get_short (e->data, o); /* Search the tag */ for (i = 0; list[i].tag && (list[i].tag != e->tag); i++); if (!list[i].tag) { strncpy (val, "Internal error.", maxlen - 1); break; } /* Find the value */ for (j = 0; list[i].strings[j] && (j < v_short); j++); if (!list[i].strings[j]) snprintf (val, maxlen, "%i", v_short); else strncpy (val, _(list[i].strings[j]), maxlen - 1); break; default: if (!e->components) break; switch (e->format) { case EXIF_FORMAT_UNDEFINED: break; case EXIF_FORMAT_BYTE: case EXIF_FORMAT_SBYTE: v_byte = e->data[0]; snprintf (val, maxlen, "0x%02x", v_byte); maxlen -= strlen (val); for (i = 1; i < e->components; i++) { v_byte = e->data[i]; snprintf (b, sizeof (b), ", 0x%02x", v_byte); strncat (val, b, maxlen); maxlen -= strlen (b); if ((signed)maxlen <= 0) break; } break; case EXIF_FORMAT_SHORT: case EXIF_FORMAT_SSHORT: v_short = exif_get_short (e->data, o); snprintf (val, maxlen, "%i", v_short); maxlen -= strlen (val); for (i = 1; i < e->components; i++) { v_short = exif_get_short (e->data + exif_format_get_size (e->format) * i, o); snprintf (b, sizeof (b), ", %i", v_short); strncat (val, b, maxlen); maxlen -= strlen (b); if ((signed)maxlen <= 0) break; } break; case EXIF_FORMAT_LONG: v_long = exif_get_long (e->data, o); snprintf (val, maxlen, "%li", (long int) v_long); maxlen -= strlen (val); for (i = 1; i < e->components; i++) { v_long = exif_get_long (e->data + exif_format_get_size (e->format) * i, o); snprintf (b, sizeof (b), ", %li", (long int) v_long); strncat (val, b, maxlen); maxlen -= strlen (b); if ((signed)maxlen <= 0) break; } break; case EXIF_FORMAT_SLONG: v_slong = exif_get_slong (e->data, o); snprintf (val, maxlen, "%li", (long int) v_slong); maxlen -= strlen (val); for (i = 1; i < e->components; i++) { v_long = exif_get_slong (e->data + exif_format_get_size (e->format) * i, o); snprintf (b, sizeof (b), ", %li", (long int) v_long); strncat (val, b, maxlen); maxlen -= strlen (b); if ((signed)maxlen <= 0) break; } break; case EXIF_FORMAT_ASCII: strncpy (val, (char *) e->data, MIN (maxlen, e->size)); break; case EXIF_FORMAT_RATIONAL: v_rat = exif_get_rational (e->data, o); if (v_rat.denominator) { snprintf (val, maxlen, "%2.2f", (double)v_rat.numerator / v_rat.denominator); } else { snprintf (val, maxlen, "%i/%i", v_rat.numerator, v_rat.denominator); } maxlen -= strlen (val); for (i = 1; i < e->components; i++) { v_rat = exif_get_rational ( e->data + 8 * i, o); snprintf (b, sizeof (b), ", %2.2f", (double)v_rat.numerator / v_rat.denominator); strncat (val, b, maxlen); maxlen -= strlen (b); if ((signed)maxlen <= 0) break; } break; case EXIF_FORMAT_SRATIONAL: v_srat = exif_get_srational (e->data, o); if (v_srat.denominator) { snprintf (val, maxlen, "%2.2f", (double)v_srat.numerator / v_srat.denominator); } else { snprintf (val, maxlen, "%i/%i", v_srat.numerator, v_srat.denominator); } maxlen -= strlen (val); for (i = 1; i < e->components; i++) { v_srat = exif_get_srational ( e->data + 8 * i, o); snprintf (b, sizeof (b), ", %2.2f", (double)v_srat.numerator / v_srat.denominator); strncat (val, b, maxlen); maxlen -= strlen (b); if ((signed) maxlen <= 0) break; } break; case EXIF_FORMAT_DOUBLE: case EXIF_FORMAT_FLOAT: default: /* What to do here? */ break; } } return val; } void exif_entry_initialize (ExifEntry *e, ExifTag tag) { time_t t; struct tm *tm; ExifRational r; ExifByteOrder o; /* We need the byte order */ if (!e || !e->parent || e->data || !e->parent->parent) return; o = exif_data_get_byte_order (e->parent->parent); e->tag = tag; switch (tag) { /* LONG, 1 component, no default */ case EXIF_TAG_PIXEL_X_DIMENSION: case EXIF_TAG_PIXEL_Y_DIMENSION: case EXIF_TAG_EXIF_IFD_POINTER: case EXIF_TAG_GPS_INFO_IFD_POINTER: case EXIF_TAG_INTEROPERABILITY_IFD_POINTER: case EXIF_TAG_JPEG_INTERCHANGE_FORMAT_LENGTH: case EXIF_TAG_JPEG_INTERCHANGE_FORMAT: e->components = 1; e->format = EXIF_FORMAT_LONG; e->size = exif_format_get_size (e->format) * e->components; e->data = exif_entry_alloc (e, e->size); break; /* SHORT, 1 component, no default */ case EXIF_TAG_SUBJECT_LOCATION: case EXIF_TAG_SENSING_METHOD: case EXIF_TAG_PHOTOMETRIC_INTERPRETATION: case EXIF_TAG_COMPRESSION: case EXIF_TAG_EXPOSURE_MODE: case EXIF_TAG_WHITE_BALANCE: case EXIF_TAG_FOCAL_LENGTH_IN_35MM_FILM: case EXIF_TAG_GAIN_CONTROL: case EXIF_TAG_SUBJECT_DISTANCE_RANGE: case EXIF_TAG_FLASH: case EXIF_TAG_COLOR_SPACE: /* SHORT, 1 component, default 0 */ case EXIF_TAG_IMAGE_WIDTH: case EXIF_TAG_IMAGE_LENGTH: case EXIF_TAG_EXPOSURE_PROGRAM: case EXIF_TAG_LIGHT_SOURCE: case EXIF_TAG_METERING_MODE: case EXIF_TAG_CUSTOM_RENDERED: case EXIF_TAG_SCENE_CAPTURE_TYPE: case EXIF_TAG_CONTRAST: case EXIF_TAG_SATURATION: case EXIF_TAG_SHARPNESS: e->components = 1; e->format = EXIF_FORMAT_SHORT; e->size = exif_format_get_size (e->format) * e->components; e->data = exif_entry_alloc (e, e->size); exif_set_short (e->data, o, 0); break; /* SHORT, 1 component, default 1 */ case EXIF_TAG_ORIENTATION: case EXIF_TAG_PLANAR_CONFIGURATION: case EXIF_TAG_YCBCR_POSITIONING: e->components = 1; e->format = EXIF_FORMAT_SHORT; e->size = exif_format_get_size (e->format) * e->components; e->data = exif_entry_alloc (e, e->size); exif_set_short (e->data, o, 1); break; /* SHORT, 1 component, default 2 */ case EXIF_TAG_RESOLUTION_UNIT: case EXIF_TAG_FOCAL_PLANE_RESOLUTION_UNIT: e->components = 1; e->format = EXIF_FORMAT_SHORT; e->size = exif_format_get_size (e->format) * e->components; e->data = exif_entry_alloc (e, e->size); exif_set_short (e->data, o, 2); break; /* SHORT, 1 component, default 3 */ case EXIF_TAG_SAMPLES_PER_PIXEL: e->components = 1; e->format = EXIF_FORMAT_SHORT; e->size = exif_format_get_size (e->format) * e->components; e->data = exif_entry_alloc (e, e->size); exif_set_short (e->data, o, 3); break; case EXIF_TAG_BITS_PER_SAMPLE: e->components = 3; e->format = EXIF_FORMAT_SHORT; e->size = exif_format_get_size (e->format) * e->components; e->data = exif_entry_alloc (e, e->size); if (!e->data) break; exif_set_short (e->data, o, 8); exif_set_short ( e->data + exif_format_get_size (e->format), o, 8); exif_set_short ( e->data + 2 * exif_format_get_size (e->format), o, 8); break; case EXIF_TAG_YCBCR_SUB_SAMPLING: e->components = 2; e->format = EXIF_FORMAT_SHORT; e->size = exif_format_get_size (e->format) * e->components; e->data = exif_entry_alloc (e, e->size); if (!e->data) break; exif_set_short (e->data, o, 2); exif_set_short ( e->data + exif_format_get_size (e->format), o, 1); break; /* SHORT, any component, no default */ case EXIF_TAG_SUBJECT_AREA: case EXIF_TAG_ISO_SPEED_RATINGS: e->components = 0; e->format = EXIF_FORMAT_SHORT; e->size = 0; e->data = 0; break; /* SRATIONAL, 1 component, no default */ case EXIF_TAG_EXPOSURE_BIAS_VALUE: case EXIF_TAG_BRIGHTNESS_VALUE: case EXIF_TAG_SHUTTER_SPEED_VALUE: e->components = 1; e->format = EXIF_FORMAT_SRATIONAL; e->size = exif_format_get_size (e->format) * e->components; e->data = exif_entry_alloc (e, e->size); break; /* RATIONAL, 1 component, no default */ case EXIF_TAG_EXPOSURE_TIME: case EXIF_TAG_FOCAL_PLANE_X_RESOLUTION: case EXIF_TAG_FOCAL_PLANE_Y_RESOLUTION: case EXIF_TAG_EXPOSURE_INDEX: case EXIF_TAG_FLASH_ENERGY: case EXIF_TAG_FNUMBER: case EXIF_TAG_FOCAL_LENGTH: case EXIF_TAG_SUBJECT_DISTANCE: case EXIF_TAG_MAX_APERTURE_VALUE: case EXIF_TAG_APERTURE_VALUE: case EXIF_TAG_COMPRESSED_BITS_PER_PIXEL: case EXIF_TAG_PRIMARY_CHROMATICITIES: case EXIF_TAG_DIGITAL_ZOOM_RATIO: e->components = 1; e->format = EXIF_FORMAT_RATIONAL; e->size = exif_format_get_size (e->format) * e->components; e->data = exif_entry_alloc (e, e->size); break; /* RATIONAL, 1 component, default 72/1 */ case EXIF_TAG_X_RESOLUTION: case EXIF_TAG_Y_RESOLUTION: e->components = 1; e->format = EXIF_FORMAT_RATIONAL; e->size = exif_format_get_size (e->format) * e->components; e->data = exif_entry_alloc (e, e->size); r.numerator = 72; r.denominator = 1; exif_set_rational (e->data, o, r); break; /* RATIONAL, 2 components, no default */ case EXIF_TAG_WHITE_POINT: e->components = 2; e->format = EXIF_FORMAT_RATIONAL; e->size = exif_format_get_size (e->format) * e->components; e->data = exif_entry_alloc (e, e->size); break; /* RATIONAL, 6 components */ case EXIF_TAG_REFERENCE_BLACK_WHITE: e->components = 6; e->format = EXIF_FORMAT_RATIONAL; e->size = exif_format_get_size (e->format) * e->components; e->data = exif_entry_alloc (e, e->size); if (!e->data) break; r.denominator = 1; r.numerator = 0; exif_set_rational (e->data, o, r); r.numerator = 255; exif_set_rational ( e->data + exif_format_get_size (e->format), o, r); r.numerator = 0; exif_set_rational ( e->data + 2 * exif_format_get_size (e->format), o, r); r.numerator = 255; exif_set_rational ( e->data + 3 * exif_format_get_size (e->format), o, r); r.numerator = 0; exif_set_rational ( e->data + 4 * exif_format_get_size (e->format), o, r); r.numerator = 255; exif_set_rational ( e->data + 5 * exif_format_get_size (e->format), o, r); break; /* ASCII, 20 components, default current time */ case EXIF_TAG_DATE_TIME: case EXIF_TAG_DATE_TIME_ORIGINAL: case EXIF_TAG_DATE_TIME_DIGITIZED: t = time (NULL); tm = localtime (&t); e->components = 20; e->format = EXIF_FORMAT_ASCII; e->size = exif_format_get_size (e->format) * e->components; e->data = exif_entry_alloc (e, e->size); if (!e->data) break; snprintf ((char *) e->data, e->size, "%04i:%02i:%02i %02i:%02i:%02i", tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec); break; /* EXIF_FORMAT_ASCII, 13 components */ case EXIF_TAG_RELATED_SOUND_FILE: e->components = 13; e->format = EXIF_FORMAT_ASCII; e->size = exif_format_get_size (e->format) * e->components; e->data = exif_entry_alloc (e, e->size); break; case EXIF_TAG_IMAGE_UNIQUE_ID: e->components = 33; e->format = EXIF_FORMAT_ASCII; e->size = exif_format_get_size (e->format) * e->components; e->data = exif_entry_alloc (e, e->size); break; /* ASCII, any components, no default */ case EXIF_TAG_SPECTRAL_SENSITIVITY: case EXIF_TAG_SUB_SEC_TIME: case EXIF_TAG_SUB_SEC_TIME_ORIGINAL: case EXIF_TAG_SUB_SEC_TIME_DIGITIZED: case EXIF_TAG_IMAGE_DESCRIPTION: case EXIF_TAG_MAKE: case EXIF_TAG_MODEL: case EXIF_TAG_SOFTWARE: case EXIF_TAG_ARTIST: case EXIF_TAG_COPYRIGHT: e->components = 0; e->format = EXIF_FORMAT_ASCII; e->size = 0; e->data = NULL; break; /* UNDEFINED, no components, no default */ case EXIF_TAG_OECF: case EXIF_TAG_SPATIAL_FREQUENCY_RESPONSE: case EXIF_TAG_NEW_CFA_PATTERN: case EXIF_TAG_DEVICE_SETTING_DESCRIPTION: case EXIF_TAG_MAKER_NOTE: case EXIF_TAG_USER_COMMENT: e->components = 0; e->format = EXIF_FORMAT_UNDEFINED; e->size = 0; e->data = NULL; break; /* UNDEFINED, 1 component, default 1 */ case EXIF_TAG_SCENE_TYPE: e->components = 1; e->format = EXIF_FORMAT_UNDEFINED; e->size = exif_format_get_size (e->format) * e->components; e->data = exif_entry_alloc (e, e->size); if (!e->data) break; e->data[0] = 0x01; break; /* UNDEFINED, 1 component, default 3 */ case EXIF_TAG_FILE_SOURCE: e->components = 1; e->format = EXIF_FORMAT_UNDEFINED; e->size = exif_format_get_size (e->format) * e->components; e->data = exif_entry_alloc (e, e->size); if (!e->data) break; e->data[0] = 0x03; break; /* UNDEFINED, 4 components, default 0 1 0 0 */ case EXIF_TAG_FLASH_PIX_VERSION: e->components = 4; e->format = EXIF_FORMAT_UNDEFINED; e->size = exif_format_get_size (e->format) * e->components; e->data = exif_entry_alloc (e, e->size); if (!e->data) break; memcpy (e->data, "0100", 4); break; /* UNDEFINED, 4 components, default 0 2 1 0 */ case EXIF_TAG_EXIF_VERSION: e->components = 4; e->format = EXIF_FORMAT_UNDEFINED; e->size = exif_format_get_size (e->format) * e->components; e->data = exif_entry_alloc (e, e->size); if (!e->data) break; memcpy (e->data, "0210", 4); break; /* UNDEFINED, 4 components, no default */ case EXIF_TAG_COMPONENTS_CONFIGURATION: e->components = 4; e->format = EXIF_FORMAT_UNDEFINED; e->size = exif_format_get_size (e->format) * e->components; e->data = malloc (e->size); break; default: break; } }