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exif.cc
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/*
This file is part of darktable,
Copyright (C) 2009-2024 darktable developers.
darktable is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
darktable 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with darktable. If not, see <http://www.gnu.org/licenses/>.
*/
#define __STDC_FORMAT_MACROS
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <errno.h>
#include <glib.h>
#include <sqlite3.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
#include <zlib.h>
#include <array>
#include <cassert>
#include <cmath>
#include <cstdlib>
#include <fstream>
#include <iostream>
#include <sstream>
#include <string>
#include <exiv2/exiv2.hpp>
#include "control/control.h"
#if defined(_WIN32) && defined(EXV_UNICODE_PATH)
#define WIDEN(s) pugi::as_wide(s)
#else
#define WIDEN(s) (s)
#endif
#include <pugixml.hpp>
using namespace std;
#include "common/color_harmony.h"
#include "common/colorlabels.h"
#include "common/darktable.h"
#include "common/debug.h"
#include "common/dng_opcode.h"
#include "common/image_cache.h"
#include "common/exif.h"
#include "common/metadata.h"
#include "common/ratings.h"
#include "common/tags.h"
#include "common/iop_order.h"
#include "common/variables.h"
#include "common/utility.h"
#include "common/history.h"
#include "common/datetime.h"
#include "control/conf.h"
#include "develop/imageop.h"
#include "develop/blend.h"
#include "develop/masks.h"
#include "imageio/imageio_common.h"
#include "imageio/imageio_jpeg.h"
#define DT_XMP_EXIF_VERSION 5
#if EXIV2_TEST_VERSION(0,28,0)
#define AnyError Error
#define toLong toInt64
#endif
// For these models we can't calculate the correct crop factor or, for some we could, but we
// prefer to take it from here, rather than complicate the calculation code with exceptions
static const struct dt_model_cropfactor dt_cropfactors[] = {
{.model = "FinePix SL1000", // exiv2 doesn't yet read the tags we need to calculate correctly
.cropfactor = 5.6f
},
{.model = "FinePix E550", // tags contain incorrect data, so formula gives us incorrect result
.cropfactor = 4.65f
},
{.model = "XF10", // resolution was calculated relative to dimensions not typical of Fuji
.cropfactor = 1.5f
},
{.model = "FinePix S1", // resolution was calculated relative to dimensions not typical of Fuji
.cropfactor = 5.6f
},
{.model = "FinePix HS10 HS11", // calculation gives a slightly inaccurate result
.cropfactor = 5.64f
},
};
// Persistent list of Exiv2 tags. Set up in dt_init().
static GList *exiv2_taglist = NULL;
static const char *_get_exiv2_type(const int type)
{
switch(type)
{
case 1:
return "Byte";
case 2:
return "Ascii";
case 3:
return "Short";
case 4:
return "Long";
case 5:
return "Rational"; // two LONGs: numerator and denumerator of a fraction
case 6:
return "SByte";
case 7:
return "Undefined";
case 8:
return "SShort";
case 9:
return "SLong";
case 10:
return "SRational"; // two SLONGs: numerator and denumerator of a fraction.
case 11:
return "Float"; // single precision (4-byte) IEEE format
case 12:
return "Double"; // double precision (8-byte) IEEE format.
case 13:
return "Ifd"; // 32-bit (4-byte) unsigned integer
case 16:
return "LLong"; // 64-bit (8-byte) unsigned integer
case 17:
return "LLong"; // 64-bit (8-byte) signed integer
case 18:
return "Ifd8"; // 64-bit (8-byte) unsigned integer
case 0x10000:
return "String";
case 0x10001:
return "Date";
case 0x10002:
return "Time";
case 0x10003:
return "Comment";
case 0x10004:
return "Directory";
case 0x10005:
return "XmpText";
case 0x10006:
return "XmpAlt";
case 0x10007:
return "XmpBag";
case 0x10008:
return "XmpSeq";
case 0x10009:
return "LangAlt";
case 0x1fffe:
return "Invalid";
case 0x1ffff:
return "LastType";
default:
return "Invalid";
}
}
static void _get_xmp_tags(const char *prefix,
GList **taglist)
{
const Exiv2::XmpPropertyInfo *pl = Exiv2::XmpProperties::propertyList(prefix);
if(pl)
{
for(int i = 0; pl[i].name_ != 0; ++i)
{
char *tag = dt_util_dstrcat(NULL, "Xmp.%s.%s,%s",
prefix, pl[i].name_, _get_exiv2_type(pl[i].typeId_));
*taglist = g_list_prepend(*taglist, tag);
}
}
}
static int _illu_to_temp(const dt_dng_illuminant_t illu)
{
switch(illu)
{
case DT_LS_StandardLightA:
case DT_LS_Tungsten:
return 2850;
case DT_LS_ISOStudioTungsten:
return 3200;
case DT_LS_StandardLightB:
return 4871;
case DT_LS_StandardLightC:
return 6774;
case DT_LS_D50:
return 5000;
case DT_LS_D55:
case DT_LS_Daylight:
case DT_LS_FineWeather:
case DT_LS_Flash:
return 5500;
case DT_LS_D65:
case DT_LS_CloudyWeather:
return 6500;
case DT_LS_D75:
case DT_LS_Shade:
return 7500;
case DT_LS_DaylightFluorescent:
return 6430;
case DT_LS_DayWhiteFluorescent:
return 5000;
case DT_LS_CoolWhiteFluorescent:
return 4150;
case DT_LS_Fluorescent:
return 4230;
case DT_LS_WhiteFluorescent:
return 3450;
case DT_LS_WarmWhiteFluorescent:
return 2940;
default:
return 0;
}
}
void dt_exif_set_exiv2_taglist()
{
if(exiv2_taglist)
return;
try
{
const Exiv2::GroupInfo *groupList = Exiv2::ExifTags::groupList();
if(groupList)
{
while(groupList->tagList_)
{
const std::string groupName(groupList->groupName_);
if(groupName.substr(0, 3) != "Sub" &&
groupName != "Image2" &&
groupName != "Image3" &&
groupName != "Thumbnail"
)
{
const Exiv2::TagInfo *tagInfo = groupList->tagList_();
while(tagInfo->tag_ != 0xFFFF)
{
char *tag = dt_util_dstrcat(NULL, "Exif.%s.%s,%s",
groupList->groupName_,
tagInfo->name_,
_get_exiv2_type(tagInfo->typeId_));
exiv2_taglist = g_list_prepend(exiv2_taglist, tag);
tagInfo++;
}
}
groupList++;
}
}
const Exiv2::DataSet *iptcEnvelopeList = Exiv2::IptcDataSets::envelopeRecordList();
while(iptcEnvelopeList->number_ != 0xFFFF)
{
char *tag = dt_util_dstrcat(NULL, "Iptc.Envelope.%s,%s%s",
iptcEnvelopeList->name_,
_get_exiv2_type(iptcEnvelopeList->type_),
iptcEnvelopeList->repeatable_ ? "-R" : "");
exiv2_taglist = g_list_prepend(exiv2_taglist, tag);
iptcEnvelopeList++;
}
const Exiv2::DataSet *iptcApplication2List =
Exiv2::IptcDataSets::application2RecordList();
while(iptcApplication2List->number_ != 0xFFFF)
{
char *tag = dt_util_dstrcat(NULL, "Iptc.Application2.%s,%s%s",
iptcApplication2List->name_,
_get_exiv2_type(iptcApplication2List->type_),
iptcApplication2List->repeatable_ ? "-R" : "");
exiv2_taglist = g_list_prepend(exiv2_taglist, tag);
iptcApplication2List++;
}
_get_xmp_tags("dc", &exiv2_taglist);
_get_xmp_tags("xmp", &exiv2_taglist);
_get_xmp_tags("xmpRights", &exiv2_taglist);
_get_xmp_tags("xmpMM", &exiv2_taglist);
_get_xmp_tags("xmpBJ", &exiv2_taglist);
_get_xmp_tags("xmpTPg", &exiv2_taglist);
_get_xmp_tags("xmpDM", &exiv2_taglist);
_get_xmp_tags("pdf", &exiv2_taglist);
_get_xmp_tags("photoshop", &exiv2_taglist);
_get_xmp_tags("crs", &exiv2_taglist);
_get_xmp_tags("tiff", &exiv2_taglist);
_get_xmp_tags("exif", &exiv2_taglist);
_get_xmp_tags("exifEX", &exiv2_taglist);
_get_xmp_tags("aux", &exiv2_taglist);
_get_xmp_tags("iptc", &exiv2_taglist);
_get_xmp_tags("iptcExt", &exiv2_taglist);
_get_xmp_tags("plus", &exiv2_taglist);
_get_xmp_tags("mwg-rs", &exiv2_taglist);
_get_xmp_tags("mwg-kw", &exiv2_taglist);
_get_xmp_tags("dwc", &exiv2_taglist);
_get_xmp_tags("dcterms", &exiv2_taglist);
_get_xmp_tags("digiKam", &exiv2_taglist);
_get_xmp_tags("kipi", &exiv2_taglist);
_get_xmp_tags("GPano", &exiv2_taglist);
_get_xmp_tags("lr", &exiv2_taglist);
_get_xmp_tags("MP", &exiv2_taglist);
_get_xmp_tags("MPRI", &exiv2_taglist);
_get_xmp_tags("MPReg", &exiv2_taglist);
_get_xmp_tags("acdsee", &exiv2_taglist);
_get_xmp_tags("mediapro", &exiv2_taglist);
_get_xmp_tags("expressionmedia", &exiv2_taglist);
_get_xmp_tags("MicrosoftPhoto", &exiv2_taglist);
}
catch (Exiv2::AnyError& e)
{
const char *errstring = e.what();
dt_print(DT_DEBUG_IMAGEIO, "[exiv2 taglist] %s\n", errstring);
}
}
const GList* dt_exif_get_exiv2_taglist()
{
if(!exiv2_taglist)
dt_exif_set_exiv2_taglist();
return exiv2_taglist;
}
static const char *_exif_get_exiv2_tag_type(const char *tagname)
{
if(!tagname) return NULL;
for(GList *tag = exiv2_taglist; tag; tag = g_list_next(tag))
{
char *t = (char *)tag->data;
if(g_str_has_prefix(t, tagname) && t[strlen(tagname)] == ',')
{
if(t)
{
t += strlen(tagname) + 1;
return t;
}
}
}
return NULL;
}
// Exiv2's readMetadata is not thread safe in 0.26. So we lock it.
// Since readMetadata might throw an exception we wrap it into
// some C++ magic to make sure we unlock in all cases. Well, actually
// not magic but basic RAII.
// FIXME: Check again once we rely on 0.27.
class Lock
{
public:
Lock() { dt_pthread_mutex_lock(&darktable.exiv2_threadsafe); }
~Lock() { dt_pthread_mutex_unlock(&darktable.exiv2_threadsafe); }
};
#define read_metadata_threadsafe(image) \
{ \
Lock lock; \
image->readMetadata(); \
}
static void _exif_import_tags(dt_image_t *img, Exiv2::XmpData::iterator &pos);
static void _read_xmp_timestamps(Exiv2::XmpData &xmpData,
dt_image_t *img,
const int xmp_version);
static void _read_xmp_harmony_guide(Exiv2::XmpData &xmpData,
dt_image_t *img,
const int xmp_version);
// This array should contain all XmpBag and XmpSeq keys used by dt
const char *dt_xmp_keys[]
= { "Xmp.dc.subject", "Xmp.lr.hierarchicalSubject",
"Xmp.darktable.colorlabels", "Xmp.darktable.history",
"Xmp.darktable.history_modversion", "Xmp.darktable.history_enabled",
"Xmp.darktable.history_end", "Xmp.darktable.iop_order_version",
"Xmp.darktable.iop_order_list", "Xmp.darktable.history_operation",
"Xmp.darktable.history_params", "Xmp.darktable.blendop_params",
"Xmp.darktable.blendop_version", "Xmp.darktable.multi_priority",
"Xmp.darktable.multi_name", "Xmp.darktable.multi_name_hand_edited",
"Xmp.darktable.iop_order", "Xmp.darktable.xmp_version",
"Xmp.darktable.raw_params", "Xmp.darktable.auto_presets_applied",
"Xmp.darktable.mask_id", "Xmp.darktable.mask_type",
"Xmp.darktable.mask_name", "Xmp.darktable.masks_history",
"Xmp.darktable.mask_num", "Xmp.darktable.mask_points",
"Xmp.darktable.mask_version", "Xmp.darktable.mask",
"Xmp.darktable.mask_nb", "Xmp.darktable.mask_src",
"Xmp.darktable.history_basic_hash", "Xmp.darktable.history_auto_hash",
"Xmp.darktable.history_current_hash", "Xmp.darktable.import_timestamp",
"Xmp.darktable.change_timestamp", "Xmp.darktable.export_timestamp",
"Xmp.darktable.print_timestamp", "Xmp.darktable.version_name",
"Xmp.darktable.harmony_guide_type", "Xmp.darktable.harmony_guide_rotation",
"Xmp.darktable.harmony_guide_width",
"Xmp.acdsee.notes", "Xmp.dc.creator",
"Xmp.dc.publisher", "Xmp.dc.title",
"Xmp.dc.description", "Xmp.dc.rights",
"Xmp.dc.format", "Xmp.xmpMM.DerivedFrom",
"Xmp.xmpMM.PreservedFileName" };
// The number of XmpBag XmpSeq keys that dt uses
static const guint dt_xmp_keys_n = G_N_ELEMENTS(dt_xmp_keys);
// Inspired by ufraw_exiv2.cc:
static void _strlcpy_to_utf8(char *dest,
const size_t dest_max,
Exiv2::ExifData::const_iterator &pos,
Exiv2::ExifData &exifData)
{
std::string str = pos->print(&exifData);
char *s = g_locale_to_utf8(str.c_str(), str.length(), NULL, NULL, NULL);
if(s != NULL)
{
g_strlcpy(dest, s, dest_max);
g_free(s);
}
else
{
g_strlcpy(dest, str.c_str(), dest_max);
}
g_strstrip(dest);
}
// If a numerical Exif value n has no string representation in Exiv2
// then the returned string is a useless "(n)" which can be discarded
static void _exif_value_str(const int value,
char *dest,
const size_t dest_max,
Exiv2::ExifData::const_iterator &pos,
Exiv2::ExifData &exifData)
{
_strlcpy_to_utf8(dest, dest_max, pos, exifData);
gchar *str_value = g_strdup_printf("(%d)", value);
if(g_strcmp0(dest, str_value) == 0)
{
dest[0] = '\0';
}
g_free(str_value);
}
// Function to remove known dt keys and subtrees from xmpdata, so not
// to append them twice. This should work because dt first reads all
// known keys.
static void _remove_known_keys(Exiv2::XmpData &xmp)
{
xmp.sortByKey();
for(unsigned int i = 0; i < dt_xmp_keys_n; i++)
{
Exiv2::XmpData::iterator pos = xmp.findKey(Exiv2::XmpKey(dt_xmp_keys[i]));
while(pos != xmp.end())
{
std::string key = pos->key();
const char *ckey = key.c_str();
size_t len = key.size();
// Stop iterating once the key no longer matches what we are
// trying to delete. This assumes sorted input.
if(!(g_str_has_prefix(ckey, dt_xmp_keys[i])
&& (ckey[len] == '[' || ckey[len] == '\0')))
break;
pos = xmp.erase(pos);
}
}
}
static void _remove_exif_keys(Exiv2::ExifData &exif,
const char *keys[],
const unsigned int n_keys)
{
for(unsigned int i = 0; i < n_keys; i++)
{
try
{
Exiv2::ExifData::iterator pos;
while((pos = exif.findKey(Exiv2::ExifKey(keys[i]))) != exif.end())
exif.erase(pos);
}
catch(Exiv2::AnyError &e)
{
// The only exception we may get is "invalid" tag, which is not
// important enough to either stop the function, or even display
// a message (it's probably the tag that is not implemented in
// the Exiv2 version used).
}
}
}
static void _remove_xmp_keys(Exiv2::XmpData &xmp,
const char *keys[],
const unsigned int n_keys)
{
for(unsigned int i = 0; i < n_keys; i++)
{
try
{
Exiv2::XmpData::iterator pos;
while((pos = xmp.findKey(Exiv2::XmpKey(keys[i]))) != xmp.end())
xmp.erase(pos);
}
catch(Exiv2::AnyError &e)
{
// The only exception we may get is "invalid" tag, which is not
// important enough to either stop the function, or even display
// a message (it's probably the tag that is not implemented in
// the Exiv2 version used).
}
}
}
static bool _exif_read_xmp_tag(Exiv2::XmpData &xmpData,
Exiv2::XmpData::iterator *pos,
string key)
{
try
{
return (*pos = xmpData.findKey(Exiv2::XmpKey(key))) != xmpData.end()
&& (*pos)->size();
}
catch(Exiv2::AnyError &e)
{
const char *errstring = e.what();
dt_print(DT_DEBUG_IMAGEIO, "[exiv2 read_xmp_tag] %s\n", errstring);
return false;
}
}
#define FIND_XMP_TAG(key) _exif_read_xmp_tag(xmpData, &pos, key)
// FIXME: according to
// http://www.exiv2.org/doc/classExiv2_1_1Metadatum.html#63c2b87249ba96679c29e01218169124
// there is no need to pass xmpData
// version = -1 --> version ignored
static bool _exif_decode_xmp_data(dt_image_t *img,
Exiv2::XmpData &xmpData,
const int version,
const bool exif_read)
{
// As this can be called several times during the image lifetime, clean up first
GList *imgs = NULL;
imgs = g_list_prepend(imgs, GINT_TO_POINTER(img->id));
try
{
Exiv2::XmpData::iterator pos;
// Older darktable version did not write this data correctly: the
// reasoning behind strdup'ing all the strings before passing it
// to sqlite3 is, that they are somehow corrupt after the call to
// sqlite3_prepare_v2() -- don't ask me why for they don't get
// passed to that function.
if(version == -1 || version > 0)
{
if(!exif_read) dt_metadata_clear(imgs, FALSE);
for(unsigned int i = 0; i < DT_METADATA_NUMBER; i++)
{
const gchar *key = dt_metadata_get_key(i);
if(FIND_XMP_TAG(key))
{
char *value = strdup(pos->toString().c_str());
char *adr = value;
// Skip any lang="" or charset=xxx
while(!strncmp(value, "lang=", 5) || !strncmp(value, "charset=", 8))
{
while(*value != ' ' && *value) value++;
while(*value == ' ') value++;
}
dt_metadata_set_import(img->id, key, value);
free(adr);
}
}
}
// If XMP file(s) are found, read the rating from here.
if(FIND_XMP_TAG("Xmp.darktable.xmp_version")
|| !dt_conf_get_bool("ui_last/ignore_exif_rating"))
{
if(FIND_XMP_TAG("Xmp.xmp.Rating"))
{
const int stars = pos->toLong();
dt_image_set_xmp_rating(img, stars);
}
else
dt_image_set_xmp_rating(img, -2);
}
if(!exif_read) dt_colorlabels_remove_all_labels(img->id);
if(FIND_XMP_TAG("Xmp.xmp.Label"))
{
std::string label = pos->toString();
if(label == "Red") // Is it really called like that in XMP files?
dt_colorlabels_set_label(img->id, 0);
else if(label == "Yellow") // Is it really called like that in XMP files?
dt_colorlabels_set_label(img->id, 1);
else if(label == "Green")
dt_colorlabels_set_label(img->id, 2);
else if(label == "Blue") // Is it really called like that in XMP files?
dt_colorlabels_set_label(img->id, 3);
else if(label == "Purple") // Is it really called like that in XMP files?
dt_colorlabels_set_label(img->id, 4);
}
// If Xmp.xmp.Label not managed from an external app use dt colors
else if(FIND_XMP_TAG("Xmp.darktable.colorlabels"))
{
// color labels
const int cnt = pos->count();
for(int i = 0; i < cnt; i++)
{
dt_colorlabels_set_label(img->id, pos->toLong(i));
}
}
if((dt_image_get_xmp_mode() != DT_WRITE_XMP_NEVER) ||
dt_conf_get_bool("ui_last/import_last_tags_imported"))
{
GList *tags = NULL;
// Preserve dt tags which are not saved in xmp file
if(!exif_read) dt_tag_set_tags(tags, imgs, TRUE, TRUE, FALSE);
if(FIND_XMP_TAG("Xmp.lr.hierarchicalSubject"))
_exif_import_tags(img, pos);
else if(FIND_XMP_TAG("Xmp.dc.subject"))
_exif_import_tags(img, pos);
}
// Read GPS location
if(FIND_XMP_TAG("Xmp.exif.GPSLatitude"))
{
img->geoloc.latitude = dt_util_gps_string_to_number(pos->toString().c_str());
}
if(FIND_XMP_TAG("Xmp.exif.GPSLongitude"))
{
img->geoloc.longitude = dt_util_gps_string_to_number(pos->toString().c_str());
}
if(FIND_XMP_TAG("Xmp.exif.GPSAltitude"))
{
Exiv2::XmpData::const_iterator ref =
xmpData.findKey(Exiv2::XmpKey("Xmp.exif.GPSAltitudeRef"));
if(ref != xmpData.end() && ref->size())
{
std::string sign_str = ref->toString();
const char *sign = sign_str.c_str();
double elevation = 0.0;
if(dt_util_gps_elevation_to_number(pos->toRational(0).first,
pos->toRational(0).second,
sign[0], &elevation))
img->geoloc.elevation = elevation;
}
}
// Read lens type from Xmp.exifEX.LensModel
if(FIND_XMP_TAG("Xmp.exifEX.LensModel"))
{
// Lens model
char *lens = strdup(pos->toString().c_str());
char *adr = lens;
if(strncmp(lens, "lang=", 5) == 0)
{
lens = strchr(lens, ' ');
if(lens != NULL) lens++;
}
// No need to do any Unicode<->locale conversion, the field is specified as ASCII
g_strlcpy(img->exif_lens, lens, sizeof(img->exif_lens));
free(adr);
}
// Read timestamp from Xmp.exif.DateTimeOriginal
if(FIND_XMP_TAG("Xmp.exif.DateTimeOriginal")
|| FIND_XMP_TAG("Xmp.photoshop.DateCreated"))
{
char *datetime = strdup(pos->toString().c_str());
dt_datetime_exif_to_img(img, datetime);
free(datetime);
}
if(imgs) g_list_free(imgs);
imgs = NULL;
return true;
}
catch(Exiv2::AnyError &e)
{
if(imgs) g_list_free(imgs);
imgs = NULL;
const char *errstring = e.what();
dt_print(DT_DEBUG_IMAGEIO,
"[exiv2 _exif_decode_xmp_data] %s: %s\n",
img->filename,
errstring);
return false;
}
}
static bool _exif_read_iptc_tag(Exiv2::IptcData &iptcData,
Exiv2::IptcData::const_iterator *pos,
string key)
{
try
{
return (*pos = iptcData.findKey(Exiv2::IptcKey(key)))
!= iptcData.end() && (*pos)->size();
}
catch(Exiv2::AnyError &e)
{
const char *errstring = e.what();
dt_print(DT_DEBUG_IMAGEIO, "[exiv2 read_iptc_tag] %s\n", errstring);
return false;
}
}
#define FIND_IPTC_TAG(key) _exif_read_iptc_tag(iptcData, &pos, key)
// FIXME: according to
// http://www.exiv2.org/doc/classExiv2_1_1Metadatum.html#63c2b87249ba96679c29e01218169124
// there is no need to pass iptcData
static bool _exif_decode_iptc_data(dt_image_t *img,
Exiv2::IptcData &iptcData)
{
try
{
Exiv2::IptcData::const_iterator pos;
iptcData.sortByKey(); // this helps to quickly find all Iptc.Application2.Keywords
if((pos = iptcData.findKey(Exiv2::IptcKey("Iptc.Application2.Keywords")))
!= iptcData.end())
{
while(pos != iptcData.end())
{
std::string key = pos->key();
if(g_strcmp0(key.c_str(), "Iptc.Application2.Keywords")) break;
std::string str = pos->print();
char *tag = dt_util_foo_to_utf8(str.c_str());
guint tagid = 0;
dt_tag_new(tag, &tagid);
dt_tag_attach(tagid, img->id, FALSE, FALSE);
g_free(tag);
++pos;
}
DT_DEBUG_CONTROL_SIGNAL_RAISE(darktable.signals, DT_SIGNAL_TAG_CHANGED);
}
if(FIND_IPTC_TAG("Iptc.Application2.Caption"))
{
std::string str = pos->print(/*&iptcData*/);
dt_metadata_set_import(img->id, "Xmp.dc.description", str.c_str());
}
if(FIND_IPTC_TAG("Iptc.Application2.Copyright"))
{
std::string str = pos->print(/*&iptcData*/);
dt_metadata_set_import(img->id, "Xmp.dc.rights", str.c_str());
}
if(FIND_IPTC_TAG("Iptc.Application2.Byline"))
{
std::string str = pos->print(/*&iptcData*/);
dt_metadata_set_import(img->id, "Xmp.dc.creator", str.c_str());
}
else if(FIND_IPTC_TAG("Iptc.Application2.Writer"))
{
std::string str = pos->print(/*&iptcData*/);
dt_metadata_set_import(img->id, "Xmp.dc.creator", str.c_str());
}
else if(FIND_IPTC_TAG("Iptc.Application2.Contact"))
{
std::string str = pos->print(/*&iptcData*/);
dt_metadata_set_import(img->id, "Xmp.dc.creator", str.c_str());
}
if(FIND_IPTC_TAG("Iptc.Application2.DateCreated"))
{
// Exiv2 already converts IPTC date and time into ISO 8601 format
GString *datetime = g_string_new(pos->toString().c_str());
datetime = g_string_append(datetime, "T");
if(FIND_IPTC_TAG("Iptc.Application2.TimeCreated"))
{
gchar *time = g_strdup(pos->toString().c_str());
datetime = g_string_append(datetime, time);
g_free(time);
}
else
datetime = g_string_append(datetime, "00:00:00");
dt_datetime_exif_to_img(img, datetime->str);
g_string_free(datetime, TRUE);
}
return true;
}
catch(Exiv2::AnyError &e)
{
const char *errstring = e.what();
dt_print(DT_DEBUG_IMAGEIO,
"[exiv2 _exif_decode_iptc_data] %s: %s\n",
img->filename,
errstring);
return false;
}
}
static bool _exif_read_exif_tag(Exiv2::ExifData &exifData,
Exiv2::ExifData::const_iterator *pos,
string key)
{
try
{
return (*pos = exifData.findKey(Exiv2::ExifKey(key)))
!= exifData.end() && (*pos)->size();
}
catch(Exiv2::AnyError &e)
{
const char *errstring = e.what();
dt_print(DT_DEBUG_IMAGEIO, "[exiv2 read_exif_tag] %s\n", errstring);
return false;
}
}
#define FIND_EXIF_TAG(key) _exif_read_exif_tag(exifData, &pos, key)
// Support DefaultUserCrop, what is the safe Exif tag?
// DefaultUserCrop is known by name only from Exiv2 0.27.4.
// Magic-nr taken from DNG spec, the spec also says it has 4 floats (top,left,bottom,right).
// We only take them if a) we find a value != the default *and* b) data are plausible.
static bool _check_usercrop(Exiv2::ExifData &exifData,
dt_image_t *img)
{
Exiv2::ExifData::const_iterator pos =
exifData.findKey(Exiv2::ExifKey("Exif.SubImage1.0xc7b5"));
// DNGs without an embedded preview have the raw image tags under
// Exif.Image instead of Exif.SubImage1.
if(pos == exifData.end())
pos = exifData.findKey(Exiv2::ExifKey("Exif.Image.0xc7b5"));
if(pos != exifData.end() && pos->count() == 4 && pos->size())
{
dt_boundingbox_t crop;
for(int i = 0; i < 4; i++) crop[i] = pos->toFloat(i);
if(((crop[0] > 0)
||(crop[1] > 0)
||(crop[2] < 1)
||(crop[3] < 1))
&& (crop[2] - crop[0] > 0.05f)
&& (crop[3] - crop[1] > 0.05f))
{
for(int i=0; i<4; i++) img->usercrop[i] = crop[i];
return TRUE;
}
}
return FALSE;
}
static gboolean _check_dng_opcodes(Exiv2::ExifData &exifData,
dt_image_t *img)
{
gboolean has_opcodes = FALSE;
Exiv2::ExifData::const_iterator pos =
exifData.findKey(Exiv2::ExifKey("Exif.SubImage1.OpcodeList2"));
// DNGs without an embedded preview have the opcodes under
// Exif.Image instead of Exif.SubImage1.
if(pos == exifData.end())
pos = exifData.findKey(Exiv2::ExifKey("Exif.Image.OpcodeList2"));
if(pos != exifData.end())
{
uint8_t *data = (uint8_t *)g_malloc(pos->size());
pos->copy(data, Exiv2::invalidByteOrder);
dt_dng_opcode_process_opcode_list_2(data, pos->size(), img);
g_free(data);
has_opcodes = TRUE;
}
Exiv2::ExifData::const_iterator posb =
exifData.findKey(Exiv2::ExifKey("Exif.SubImage1.OpcodeList3"));
// DNGs without an embedded preview have the opcodes under
// Exif.Image instead of Exif.SubImage1.
if(posb == exifData.end())
posb = exifData.findKey(Exiv2::ExifKey("Exif.Image.OpcodeList3"));
if(posb != exifData.end())
{
uint8_t *data = (uint8_t *)g_malloc(posb->size());
posb->copy(data, Exiv2::invalidByteOrder);
dt_dng_opcode_process_opcode_list_3(data, posb->size(), img);
g_free(data);
has_opcodes = TRUE;
}
return has_opcodes;
}
static gboolean _check_lens_correction_data(Exiv2::ExifData &exifData,
dt_image_t *img)
{
Exiv2::ExifData::const_iterator pos, posd, posc, posv;
/*
* Sony lens correction data
*/
if(Exiv2::versionNumber() >= EXIV2_MAKE_VERSION(0, 27, 4)
&& _exif_read_exif_tag(exifData, &posd, "Exif.SubImage1.DistortionCorrParams")
&& _exif_read_exif_tag(exifData, &posc, "Exif.SubImage1.ChromaticAberrationCorrParams")
&& _exif_read_exif_tag(exifData, &posv, "Exif.SubImage1.VignettingCorrParams"))
{
// Validate
const int nc = posd->toLong(0);
if(nc <= 16 && 2*nc == posc->toLong(0) && nc == posv->toLong(0))
{
img->exif_correction_type = CORRECTION_TYPE_SONY;
img->exif_correction_data.sony.nc = nc;
for(int i = 0; i < nc; i++)
{
img->exif_correction_data.sony.distortion[i] = posd->toLong(i + 1);
img->exif_correction_data.sony.ca_r[i] = posc->toLong(i + 1);
img->exif_correction_data.sony.ca_b[i] = posc->toLong(nc + i + 1);
img->exif_correction_data.sony.vignetting[i] = posv->toLong(i + 1);
}
}
}
/*
* Fuji lens correction data
*/
if(Exiv2::versionNumber() >= EXIV2_MAKE_VERSION(0, 27, 4)
&& _exif_read_exif_tag(exifData, &posd, "Exif.Fujifilm.GeometricDistortionParams")
&& _exif_read_exif_tag(exifData, &posc, "Exif.Fujifilm.ChromaticAberrationParams")
&& _exif_read_exif_tag(exifData, &posv, "Exif.Fujifilm.VignettingParams"))
{
// X-Trans IV/V
if(posd->count() == 19 && posc->count() == 29 && posv->count() == 19)
{
const int nc = 9;
img->exif_correction_type = CORRECTION_TYPE_FUJI;
img->exif_correction_data.fuji.nc = nc;
for(int i = 0; i < nc; i++)
{
const float kd = posd->toFloat(i + 1);
const float kc = posc->toFloat(i + 1);
const float kv = posv->toFloat(i + 1);
// Check that the knots position is the same for distortion, ca and vignetting,
if(kd != kc || kd != kv)
{
img->exif_correction_type = CORRECTION_TYPE_NONE;
break;
}
img->exif_correction_data.fuji.knots[i] = kd;
img->exif_correction_data.fuji.distortion[i] = posd->toFloat(i + 10);
img->exif_correction_data.fuji.ca_r[i] = posc->toFloat(i + 10);
img->exif_correction_data.fuji.ca_b[i] = posc->toFloat(i + 19);
img->exif_correction_data.fuji.vignetting[i] = posv->toFloat(i + 10);
}
// Account for the 1.25x crop modes in some Fuji cameras
if(FIND_EXIF_TAG("Exif.Fujifilm.CropMode")
&& (pos->toLong() == 2 || pos->toLong() == 4))
img->exif_correction_data.fuji.cropf = 1.25f;
else
img->exif_correction_data.fuji.cropf = 1;
}
// X-Trans I/II/III
else if(posd->count() == 23 && posc->count() == 31 && posv->count() == 23)
{
const int nc = 11;
img->exif_correction_type = CORRECTION_TYPE_FUJI;
img->exif_correction_data.fuji.nc = nc;
for(int i = 0; i < nc; i++)
{
const float kd = posd->toFloat(i + 1);
float kc = 0;
// ca data doesn't provide first knot (0)
if(i != 0) kc = posc->toFloat(i);
const float kv = posv->toFloat(i + 1);
// check that the knots position is the same for distortion, ca and vignetting,
if(kd != kc || kd != kv)
{
img->exif_correction_type = CORRECTION_TYPE_NONE;
break;
}
img->exif_correction_data.fuji.knots[i] = kd;
img->exif_correction_data.fuji.distortion[i] = posd->toFloat(i + 12);
// ca data doesn't provide first knot (0)
if(i == 0)
{
img->exif_correction_data.fuji.ca_r[i] = 0;
img->exif_correction_data.fuji.ca_b[i] = 0;
}
else
{