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author | Lorry Tar Creator <lorry-tar-importer@lorry> | 2012-07-12 20:34:34 +0000 |
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committer | Lorry Tar Creator <lorry-tar-importer@lorry> | 2012-07-12 20:34:34 +0000 |
commit | 0c6a5fa0d9719a40748d8726b4543f02f70518c1 (patch) | |
tree | 241f9ae619069ac5861d7621ade296102ab5de5d /libexif/exif-entry.c | |
download | libexif-tarball-master.tar.gz |
libexif-0.6.21HEADlibexif-0.6.21master
Diffstat (limited to 'libexif/exif-entry.c')
-rw-r--r-- | libexif/exif-entry.c | 1748 |
1 files changed, 1748 insertions, 0 deletions
diff --git a/libexif/exif-entry.c b/libexif/exif-entry.c new file mode 100644 index 0000000..54a90a2 --- /dev/null +++ b/libexif/exif-entry.c @@ -0,0 +1,1748 @@ +/* exif-entry.c + * + * Copyright (c) 2001 Lutz Mueller <lutz@users.sourceforge.net> + * + * 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 <config.h> + +#include <libexif/exif-entry.h> +#include <libexif/exif-ifd.h> +#include <libexif/exif-utils.h> +#include <libexif/i18n.h> + +#include <ctype.h> +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <time.h> +#include <math.h> + +#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 + * and is based entirely on the data type. + * \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; + unsigned int i; + size_t len; + const ExifByteOrder o = exif_data_get_byte_order (e->parent->parent); + + if (!e->size || !maxlen) + return; + ++maxlen; /* include the terminating NUL */ + 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); + len = strlen (val); + for (i = 1; i < e->components; i++) { + v_byte = e->data[i]; + snprintf (val+len, maxlen-len, ", 0x%02x", v_byte); + len += strlen (val+len); + if (len >= maxlen-1) break; + } + break; + case EXIF_FORMAT_SHORT: + v_short = exif_get_short (e->data, o); + snprintf (val, maxlen, "%u", v_short); + len = 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 (val+len, maxlen-len, ", %u", v_short); + len += strlen (val+len); + if (len >= maxlen-1) break; + } + break; + case EXIF_FORMAT_SSHORT: + v_sshort = exif_get_sshort (e->data, o); + snprintf (val, maxlen, "%i", v_sshort); + len = 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 (val+len, maxlen-len, ", %i", v_sshort); + len += strlen (val+len); + if (len >= maxlen-1) break; + } + break; + case EXIF_FORMAT_LONG: + v_long = exif_get_long (e->data, o); + snprintf (val, maxlen, "%lu", (unsigned long) v_long); + len = 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 (val+len, maxlen-len, ", %lu", (unsigned long) v_long); + len += strlen (val+len); + if (len >= maxlen-1) break; + } + break; + case EXIF_FORMAT_SLONG: + v_slong = exif_get_slong (e->data, o); + snprintf (val, maxlen, "%li", (long) v_slong); + len = 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 (val+len, maxlen-len, ", %li", (long) v_slong); + len += strlen (val+len); + if (len >= maxlen-1) break; + } + break; + case EXIF_FORMAT_ASCII: + strncpy (val, (char *) e->data, MIN (maxlen-1, e->size)); + val[MIN (maxlen-1, e->size)] = 0; + break; + case EXIF_FORMAT_RATIONAL: + len = 0; + for (i = 0; i < e->components; i++) { + if (i > 0) { + snprintf (val+len, maxlen-len, ", "); + len += strlen (val+len); + } + 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 (val+len, maxlen-len, "%2.*f", + decimals, + (double) v_rat.numerator / + (double) v_rat.denominator); + } else + snprintf (val+len, maxlen-len, "%lu/%lu", + (unsigned long) v_rat.numerator, + (unsigned long) v_rat.denominator); + len += strlen (val+len); + if (len >= maxlen-1) break; + } + break; + case EXIF_FORMAT_SRATIONAL: + len = 0; + for (i = 0; i < e->components; i++) { + if (i > 0) { + snprintf (val+len, maxlen-len, ", "); + len += strlen (val+len); + } + 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 (val+len, maxlen-len, "%2.*f", + decimals, + (double) v_srat.numerator / + (double) v_srat.denominator); + } else + snprintf (val+len, maxlen-len, "%li/%li", + (long) v_srat.numerator, + (long) v_srat.denominator); + len += strlen (val+len); + if (len >= maxlen-1) 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))); +} + +/*! Check if a string consists entirely of a single, repeated character. + * Up to first n bytes are checked. + * + * \param[in] data pointer of string to check + * \param[in] ch character to match + * \param[in] n maximum number of characters to match + * + * \return 0 if the string matches or is of zero length, nonzero otherwise + */ +static int +match_repeated_char(const unsigned char *data, unsigned char ch, size_t n) +{ + int i; + for (i=n; i; --i, ++data) { + if (*data == 0) { + i = 0; /* all bytes before NUL matched */ + break; + } + if (*data != ch) + break; + } + return i; +} + +#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; + 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}, + {"0230", 2, 3}, + {"" , 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); + + if (!e || !e->parent || !e->parent->parent || !maxlen) + return val; + + /* make sure the returned string is zero terminated */ + memset (val, 0, maxlen); + maxlen--; + memset (b, 0, sizeof (b)); + + /* We need the byte order */ + 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 but seems to contain data. + * Print as much as possible. + */ + exif_entry_log (e, EXIF_LOG_CODE_DEBUG, + _("Tag UserComment contains data but is " + "against specification.")); + for (j = 0; (i < e->size) && (j < maxlen); i++, j++) { + exif_entry_log (e, EXIF_LOG_CODE_DEBUG, + _("Byte at position %i: 0x%02x"), i, e->data[i]); + val[j] = 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. + * Remember that a corrupted tag might not be NUL-terminated + */ + if (e->size && e->data && match_repeated_char(e->data, ' ', e->size)) + 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)); + k = 0; + if (e->size && e->data) { + const unsigned char *tagdata = memchr(e->data, 0, e->size); + if (tagdata++) { + int editor_ofs = tagdata - e->data; + int remaining = e->size - editor_ofs; + if (match_repeated_char(tagdata, ' ', remaining)) { + strncat (val, (const char*)tagdata, MIN (maxlen - strlen (val), remaining)); + ++k; + } + } + } + if (!k) + 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: + { + /* Sanity check the size to prevent overflow */ + if (e->size+sizeof(unsigned short) < e->size) break; + + /* The tag may not be U+0000-terminated , so make a local + U+0000-terminated copy before converting it */ + unsigned short *utf16 = exif_mem_alloc (e->priv->mem, e->size+sizeof(unsigned short)); + if (!utf16) break; + memcpy(utf16, e->data, e->size); + utf16[e->size/sizeof(unsigned short)] = 0; + + /* Warning! The texts are converted from UTF16 to UTF8 */ + /* FIXME: use iconv to convert into the locale encoding */ + exif_convert_utf16_to_utf8(val, utf16, maxlen); + exif_mem_free(e->priv->mem, utf16); + 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; + } +} |