/* exif-entry.c * * Copyright (c) 2001 Lutz Mueller * * 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., 51 Franklin Street, Fifth Floor, * Boston, MA 02110-1301 USA. */ #include #include #include #include #include #include #include #include #include #include #include #ifndef M_PI #define M_PI 3.14159265358979323846 #endif struct _ExifEntryPrivate { unsigned int ref_count; ExifMem *mem; }; /* This function is hidden in exif-data.c */ ExifLog *exif_data_get_log (ExifData *); #ifndef NO_VERBOSE_TAG_STRINGS 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); } #else #if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L #define exif_entry_log(...) do { } while (0) #elif defined(__GNUC__) #define exif_entry_log(x...) do { } while (0) #else #define exif_entry_log (void) #endif #endif 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); } } /*! Get a value and convert it to an ExifShort. * \bug Not all types are converted that could be converted and no indication * is made when that occurs */ static inline ExifShort exif_get_short_convert (const unsigned char *buf, ExifFormat format, ExifByteOrder order) { switch (format) { case EXIF_FORMAT_LONG: return (ExifShort) exif_get_long (buf, order); case EXIF_FORMAT_SLONG: return (ExifShort) exif_get_slong (buf, order); case EXIF_FORMAT_SHORT: return (ExifShort) exif_get_short (buf, order); case EXIF_FORMAT_SSHORT: return (ExifShort) exif_get_sshort (buf, order); case EXIF_FORMAT_BYTE: case EXIF_FORMAT_SBYTE: return (ExifShort) buf[0]; default: /* Unsupported type */ return (ExifShort) 0; } } void exif_entry_fix (ExifEntry *e) { unsigned int i, newsize; unsigned char *newdata; 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: case EXIF_TAG_ISO_SPEED_RATINGS: switch (e->format) { case EXIF_FORMAT_LONG: case EXIF_FORMAT_SLONG: case EXIF_FORMAT_BYTE: case EXIF_FORMAT_SBYTE: case EXIF_FORMAT_SSHORT: if (!e->parent || !e->parent->parent) break; 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_in_ifd(e->tag, exif_entry_get_ifd(e)), exif_format_get_name (e->format), exif_format_get_name (EXIF_FORMAT_SHORT)); o = exif_data_get_byte_order (e->parent->parent); newsize = e->components * exif_format_get_size (EXIF_FORMAT_SHORT); newdata = exif_entry_alloc (e, newsize); if (!newdata) { exif_entry_log (e, EXIF_LOG_CODE_NO_MEMORY, "Could not allocate %lu byte(s).", (unsigned long)newsize); break; } for (i = 0; i < e->components; i++) exif_set_short ( newdata + i * exif_format_get_size ( EXIF_FORMAT_SHORT), o, exif_get_short_convert ( e->data + i * exif_format_get_size (e->format), e->format, o)); exif_mem_free (e->priv->mem, e->data); e->data = newdata; e->size = newsize; e->format = EXIF_FORMAT_SHORT; break; case EXIF_FORMAT_SHORT: /* No conversion necessary */ break; default: exif_entry_log (e, EXIF_LOG_CODE_CORRUPT_DATA, _("Tag '%s' is of format '%s' (which is " "against specification) but cannot be changed " "to format '%s'."), exif_tag_get_name_in_ifd(e->tag, exif_entry_get_ifd(e)), exif_format_get_name (e->format), exif_format_get_name (EXIF_FORMAT_SHORT)); 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_in_ifd(e->tag, exif_entry_get_ifd(e)), exif_format_get_name (EXIF_FORMAT_SRATIONAL), exif_format_get_name (EXIF_FORMAT_RATIONAL)); break; default: break; } break; /* All these tags need to be of format 'SRational'. */ case EXIF_TAG_EXPOSURE_BIAS_VALUE: case EXIF_TAG_BRIGHTNESS_VALUE: case EXIF_TAG_SHUTTER_SPEED_VALUE: switch (e->format) { case EXIF_FORMAT_RATIONAL: if (!e->parent || !e->parent->parent) break; o = exif_data_get_byte_order (e->parent->parent); for (i = 0; i < e->components; i++) { r = exif_get_rational (e->data + i * exif_format_get_size ( EXIF_FORMAT_RATIONAL), o); sr.numerator = (ExifLong) r.numerator; sr.denominator = (ExifLong) r.denominator; exif_set_srational (e->data + i * exif_format_get_size ( EXIF_FORMAT_SRATIONAL), o, sr); } e->format = EXIF_FORMAT_SRATIONAL; 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_in_ifd(e->tag, exif_entry_get_ifd(e)), exif_format_get_name (EXIF_FORMAT_RATIONAL), exif_format_get_name (EXIF_FORMAT_SRATIONAL)); 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); } /* 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. */ for (i = 0; (i < e->size) && !e->data[i]; i++); if (!i) for ( ; (i < e->size) && (e->data[i] == ' '); i++); if ((i >= 8) && (i < e->size)) { exif_entry_log (e, EXIF_LOG_CODE_DEBUG, _("Tag 'UserComment' is not empty but does not " "start with a format identifier. " "This has been fixed.")); memcpy (e->data, "ASCII\0\0\0", 8); break; } /* * First 8 bytes need to follow the specification. If they don't, * assume ASCII. */ 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 a " "format identifier. This has been fixed.")); break; } break; default: break; } } /*! Format the value of an ExifEntry for human display in a generic way. * The output is localized. The formatting is independent of the tag number. * \pre The buffer at val is entirely cleared to 0. This guarantees that the * resulting string will be NUL terminated. * \pre The ExifEntry is already a member of an ExifData. * \param[in] e EXIF entry * \param[out] val buffer in which to store value * \param[in] maxlen one less than the length of the buffer val */ static void exif_entry_format_value(ExifEntry *e, char *val, size_t maxlen) { ExifByte v_byte; ExifShort v_short; ExifSShort v_sshort; ExifLong v_long; ExifRational v_rat; ExifSRational v_srat; ExifSLong v_slong; char b[64]; unsigned int i; const ExifByteOrder o = exif_data_get_byte_order (e->parent->parent); if (!e->size) return; switch (e->format) { case EXIF_FORMAT_UNDEFINED: snprintf (val, maxlen, _("%i bytes undefined data"), e->size); 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: v_short = exif_get_short (e->data, o); snprintf (val, maxlen, "%u", 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), ", %u", v_short); strncat (val, b, maxlen); maxlen -= strlen (b); if ((signed)maxlen <= 0) break; } break; case EXIF_FORMAT_SSHORT: v_sshort = exif_get_sshort (e->data, o); snprintf (val, maxlen, "%i", v_sshort); maxlen -= strlen (val); for (i = 1; i < e->components; i++) { v_sshort = exif_get_short (e->data + exif_format_get_size (e->format) * i, o); snprintf (b, sizeof (b), ", %i", v_sshort); 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, "%lu", (unsigned long) 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), ", %lu", (unsigned long) 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) v_slong); maxlen -= strlen (val); for (i = 1; i < e->components; i++) { v_slong = exif_get_slong (e->data + exif_format_get_size (e->format) * i, o); snprintf (b, sizeof (b), ", %li", (long) v_slong); 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: for (i = 0; i < e->components; i++) { if (i > 0) { strncat (val, ", ", maxlen); maxlen -= 2; } v_rat = exif_get_rational ( e->data + 8 * i, o); if (v_rat.denominator) { /* * Choose the number of significant digits to * display based on the size of the denominator. * It is scaled so that denominators within the * range 13..120 will show 2 decimal points. */ int decimals = (int)(log10(v_rat.denominator)-0.08+1.0); snprintf (b, sizeof (b), "%2.*f", decimals, (double) v_rat.numerator / (double) v_rat.denominator); } else snprintf (b, sizeof (b), "%lu/%lu", (unsigned long) v_rat.numerator, (unsigned long) v_rat.denominator); strncat (val, b, maxlen); maxlen -= strlen (b); if ((signed) maxlen <= 0) break; } break; case EXIF_FORMAT_SRATIONAL: for (i = 0; i < e->components; i++) { if (i > 0) { strncat (val, ", ", maxlen); maxlen -= 2; } v_srat = exif_get_srational ( e->data + 8 * i, o); if (v_srat.denominator) { int decimals = (int)(log10(fabs(v_srat.denominator))-0.08+1.0); snprintf (b, sizeof (b), "%2.*f", decimals, (double) v_srat.numerator / (double) v_srat.denominator); } else snprintf (b, sizeof (b), "%li/%li", (long) v_srat.numerator, (long) 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: snprintf (val, maxlen, _("%i bytes unsupported data type"), e->size); 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_in_ifd (e->tag, exif_entry_get_ifd(e))); 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 const struct { ExifTag tag; const char *strings[10]; } list[] = { #ifndef NO_VERBOSE_TAG_DATA { 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_("Reversed mono"), N_("Normal mono"), N_("RGB"), N_("Palette"), "", N_("CMYK"), N_("YCbCr"), "", N_("CieLAB"), 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}}, #endif { 0, {NULL}} }; static const struct { ExifTag tag; struct { int index; const char *values[4]; /*!< list of progressively shorter string descriptions; the longest one that fits will be selected */ } elem[25]; } list2[] = { #ifndef NO_VERBOSE_TAG_DATA { 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}}, {7, {N_("JPEG compression"), NULL}}, {8, {N_("Deflate/ZIP compression"), NULL}}, {32773, {N_("PackBits 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_("Without strobe"), NULL}}, {0x0007, {N_("Strobe return light detected"), N_("With strobe"), NULL}}, {0x0008, {N_("Flash did not fire"), NULL}}, /* Olympus E-330 */ {0x0009, {N_("Flash fired, compulsory flash mode"), NULL}}, {0x000d, {N_("Flash fired, compulsory flash mode, return light " "not detected"), NULL}}, {0x000f, {N_("Flash fired, compulsory flash mode, return light " "detected"), NULL}}, {0x0010, {N_("Flash did not fire, compulsory 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 mode, " "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}}, {2, {N_("Adobe RGB"), NULL}}, {0xffff, {N_("Uncalibrated"), NULL}}, {0x0000, {NULL}}}}, #endif {0, { { 0, {NULL}}} } }; const char * exif_entry_get_value (ExifEntry *e, char *val, unsigned int maxlen) { unsigned int i, j, k; const unsigned char *t; ExifShort v_short, v_short2, v_short3, v_short4; ExifByte v_byte; ExifRational v_rat; ExifSRational v_srat; char b[64]; const char *c; ExifByteOrder o; double d; ExifEntry *entry; static const struct { char label[5]; char major, minor; } versions[] = { {"0110", 1, 1}, {"0120", 1, 2}, {"0200", 2, 0}, {"0210", 2, 1}, {"0220", 2, 2}, {"0221", 2, 21}, {"" , 0, 0} }; /* FIXME: This belongs to somewhere else. */ /* libexif should use the default system locale. * If an application specifically requires UTF-8, then we * must give the application a way to tell libexif that. * * bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8"); */ bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR); /* make sure the returned string is zero terminated */ memset (val, 0, maxlen); maxlen--; memset (b, 0, sizeof (b)); /* We need the byte order */ if (!e || !e->parent || !e->parent->parent) return val; o = exif_data_get_byte_order (e->parent->parent); /* 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); /* FIXME: use iconv to convert into the locale encoding. * EXIF 2.2 implies (but does not say) that this encoding is * UCS-2. */ break; } if ((e->size >= 8) && !memcmp (e->data, "JIS\0\0\0\0\0", 8)) { strncpy (val, _("Unsupported JIS string"), maxlen); /* FIXME: use iconv to convert into the locale encoding */ 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 ((char *)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. */ strncat (val, " - ", maxlen - strlen (val)); if (e->size && e->data) { size_t ts; t = e->data + strlen ((char *) e->data) + 1; ts = e->data + e->size - t; if ((ts > 0) && (strspn ((char *)t, " ") != ts)) strncat (val, (char *)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) { exif_entry_format_value(e, val, maxlen); break; } d = (double) v_rat.numerator / (double) v_rat.denominator; snprintf (val, maxlen, "f/%.01f", d); break; case EXIF_TAG_APERTURE_VALUE: case EXIF_TAG_MAX_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 || (0x80000000 == v_rat.numerator)) { exif_entry_format_value(e, val, maxlen); break; } d = (double) v_rat.numerator / (double) v_rat.denominator; snprintf (val, maxlen, _("%.02f EV"), d); snprintf (b, sizeof (b), _(" (f/%.01f)"), pow (2, d / 2.)); if (maxlen > strlen (val) + strlen (b)) strncat (val, b, maxlen - strlen (val)); 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) { exif_entry_format_value(e, val, maxlen); break; } /* * 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 ((char *)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 ((char *)entry->data, "DiMAGE 7", 8)) d = 3.9; else if (!strncmp ((char *)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)); d = (double) v_rat.numerator / (double) v_rat.denominator; snprintf (val, maxlen, "%.1f mm", d); if (maxlen > strlen (val) + strlen (b)) strncat (val, b, maxlen - strlen (val)); 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) { exif_entry_format_value(e, val, maxlen); break; } d = (double) v_rat.numerator / (double) v_rat.denominator; snprintf (val, maxlen, "%.1f m", d); 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) { exif_entry_format_value(e, val, maxlen); break; } d = (double) v_rat.numerator / (double) v_rat.denominator; if (d < 1) snprintf (val, maxlen, _("1/%i"), (int) (0.5 + 1. / d)); else snprintf (val, maxlen, "%i", (int) d); if (maxlen > strlen (val) + strlen (_(" sec."))) strncat (val, _(" sec."), maxlen - strlen (val)); 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) { exif_entry_format_value(e, val, maxlen); break; } d = (double) v_srat.numerator / (double) v_srat.denominator; snprintf (val, maxlen, _("%.02f EV"), d); d = 1. / pow (2, d); if (d < 1) snprintf (b, sizeof (b), _(" (1/%d sec.)"), (int) (1. / d)); else snprintf (b, sizeof (b), _(" (%d sec.)"), (int) d); strncat (val, b, maxlen - strlen (val)); 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); if (!v_srat.denominator) { exif_entry_format_value(e, val, maxlen); break; } d = (double) v_srat.numerator / (double) v_srat.denominator; snprintf (val, maxlen, _("%.02f EV"), d); snprintf (b, sizeof (b), _(" (%.02f cd/m^2)"), 1. / (M_PI * 0.3048 * 0.3048) * pow (2, d)); if (maxlen > strlen (val) + strlen (b)) strncat (val, b, maxlen - strlen (val)); break; case EXIF_TAG_FILE_SOURCE: CF (e, EXIF_FORMAT_UNDEFINED, val, maxlen); CC (e, 1, val, maxlen); v_byte = e->data[0]; if (v_byte == 3) strncpy (val, _("DSC"), maxlen); else snprintf (val, maxlen, _("Internal error (unknown " "value %i)"), v_byte); 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) { exif_entry_format_value(e, val, maxlen); break; } d = (double) v_srat.numerator / (double) v_srat.denominator; snprintf (val, maxlen, _("%.02f EV"), d); break; case EXIF_TAG_SCENE_TYPE: CF (e, EXIF_FORMAT_UNDEFINED, val, maxlen); CC (e, 1, val, maxlen); v_byte = e->data[0]; if (v_byte == 1) strncpy (val, _("Directly photographed"), maxlen); else snprintf (val, maxlen, _("Internal error (unknown " "value %i)"), v_byte); 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, "%u, %u", v_short, v_short2); 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_GPS_VERSION_ID: /* This is only valid in the GPS IFD */ CF (e, EXIF_FORMAT_BYTE, val, maxlen); CC (e, 4, val, maxlen); v_byte = e->data[0]; snprintf (val, maxlen, "%u", v_byte); maxlen -= strlen (val); for (i = 1; i < e->components; i++) { v_byte = e->data[i]; snprintf (b, sizeof (b), ".%u", v_byte); strncat (val, b, maxlen); maxlen -= strlen (b); if ((signed)maxlen <= 0) break; } break; case EXIF_TAG_INTEROPERABILITY_VERSION: /* a.k.a. case EXIF_TAG_GPS_LATITUDE: */ /* This tag occurs in EXIF_IFD_INTEROPERABILITY */ if (e->format == EXIF_FORMAT_UNDEFINED) { strncpy (val, (char *) e->data, MIN (maxlen, e->size)); break; } /* EXIF_TAG_GPS_LATITUDE is the same numerically as * EXIF_TAG_INTEROPERABILITY_VERSION but in EXIF_IFD_GPS */ exif_entry_format_value(e, val, maxlen); break; case EXIF_TAG_GPS_ALTITUDE_REF: /* This is only valid in the GPS IFD */ CF (e, EXIF_FORMAT_BYTE, val, maxlen); CC (e, 1, val, maxlen); v_byte = e->data[0]; if (v_byte == 0) strncpy (val, _("Sea level"), maxlen); else if (v_byte == 1) strncpy (val, _("Sea level reference"), maxlen); else snprintf (val, maxlen, _("Internal error (unknown " "value %i)"), v_byte); break; case EXIF_TAG_GPS_TIME_STAMP: /* This is only valid in the GPS IFD */ CF (e, EXIF_FORMAT_RATIONAL, val, maxlen); CC (e, 3, val, maxlen); v_rat = exif_get_rational (e->data, o); if (!v_rat.denominator) { exif_entry_format_value(e, val, maxlen); break; } i = v_rat.numerator / v_rat.denominator; v_rat = exif_get_rational (e->data + exif_format_get_size (e->format), o); if (!v_rat.denominator) { exif_entry_format_value(e, val, maxlen); break; } j = v_rat.numerator / v_rat.denominator; v_rat = exif_get_rational (e->data + 2*exif_format_get_size (e->format), o); if (!v_rat.denominator) { exif_entry_format_value(e, val, maxlen); break; } d = (double) v_rat.numerator / (double) v_rat.denominator; snprintf (val, maxlen, "%02u:%02u:%05.2f", i, j, d); break; case EXIF_TAG_METERING_MODE: case EXIF_TAG_COMPRESSION: case EXIF_TAG_LIGHT_SOURCE: 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) { snprintf (val, maxlen, _("Internal error (unknown " "value %i)"), v_short); break; } /* Find the value */ for (j = 0; list2[i].elem[j].values[0] && (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[k]; k++) { size_t l = strlen (_(list2[i].elem[j].values[k])); if ((maxlen > l) && (strlen (val) < l)) strncpy (val, _(list2[i].elem[j].values[k]), maxlen); } if (!val[0]) 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) { snprintf (val, maxlen, _("Internal error (unknown " "value %i)"), v_short); 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 if (!*list[i].strings[j]) snprintf (val, maxlen, _("Unknown value %i"), v_short); else strncpy (val, _(list[i].strings[j]), maxlen); break; case EXIF_TAG_XP_TITLE: case EXIF_TAG_XP_COMMENT: case EXIF_TAG_XP_AUTHOR: case EXIF_TAG_XP_KEYWORDS: case EXIF_TAG_XP_SUBJECT: /* Warning! The texts are converted from UTF16 to UTF8 */ /* FIXME: use iconv to convert into the locale encoding */ exif_convert_utf16_to_utf8(val, (unsigned short*)e->data, MIN(maxlen, e->size)); break; default: /* Use a generic value formatting */ exif_entry_format_value(e, val, maxlen); } return val; } /*! * \bug Log and report failed exif_mem_malloc() calls. */ void exif_entry_initialize (ExifEntry *e, ExifTag tag) { 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); if (!e->data) break; 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_ISO_SPEED_RATINGS: /* 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); if (!e->data) break; 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); if (!e->data) break; 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); if (!e->data) break; 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); if (!e->data) break; exif_set_short (e->data, o, 3); break; /* SHORT, 1 component, default 0xffff */ case EXIF_TAG_COLOR_SPACE: 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); if (!e->data) break; exif_set_short (e->data, o, 0xffff); break; /* SHORT, 3 components, default 8 8 8 */ 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; /* SHORT, 2 components, default 2 1 */ 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; /* 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); if (!e->data) break; 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); if (!e->data) break; 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); if (!e->data) break; 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); if (!e->data) break; 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 */ case EXIF_TAG_DATE_TIME: case EXIF_TAG_DATE_TIME_ORIGINAL: case EXIF_TAG_DATE_TIME_DIGITIZED: { time_t t; #ifdef HAVE_LOCALTIME_R struct tm tms; #endif struct tm *tm; t = time (NULL); #ifdef HAVE_LOCALTIME_R tm = localtime_r (&t, &tms); #else tm = localtime (&t); #endif 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; } /* ASCII, no default */ case EXIF_TAG_SUB_SEC_TIME: case EXIF_TAG_SUB_SEC_TIME_ORIGINAL: case EXIF_TAG_SUB_SEC_TIME_DIGITIZED: e->components = 0; e->format = EXIF_FORMAT_ASCII; e->size = 0; e->data = NULL; break; /* ASCII, default "[None]" */ case EXIF_TAG_IMAGE_DESCRIPTION: case EXIF_TAG_MAKE: case EXIF_TAG_MODEL: case EXIF_TAG_SOFTWARE: case EXIF_TAG_ARTIST: e->components = strlen (_("[None]")) + 1; 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; strncpy ((char *)e->data, _("[None]"), e->size); break; /* ASCII, default "[None]\0[None]\0" */ case EXIF_TAG_COPYRIGHT: e->components = (strlen (_("[None]")) + 1) * 2; 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; strcpy (((char *)e->data) + 0, _("[None]")); strcpy (((char *)e->data) + strlen (_("[None]")) + 1, _("[None]")); 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 48 49 48 48 */ 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 48 50 49 48 */ 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, default 1 2 3 0 */ 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 = exif_entry_alloc (e, e->size); if (!e->data) break; e->data[0] = 1; e->data[1] = 2; e->data[2] = 3; e->data[3] = 0; break; /* UNDEFINED, no components, no default */ /* Use this if the tag is otherwise unsupported */ case EXIF_TAG_MAKER_NOTE: case EXIF_TAG_USER_COMMENT: default: e->components = 0; e->format = EXIF_FORMAT_UNDEFINED; e->size = 0; e->data = NULL; break; } }