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// ***************************************************************** -*- C++ -*-
/*
* This program 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 2
* of the License, or (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/*!
@file exiv2_extractor.cc
@brief libextractor plugin for Exif using exiv2
@version $Rev$
@author Andreas Huggel (ahu)
<a href="mailto:ahuggel@gmx.net">ahuggel@gmx.net</a>
@date 30-Jun-05, ahu: created; 15-Dec-09, cg: updated
*/
#include <iostream>
#include <iomanip>
#include <cassert>
#include <cstring>
#include <math.h>
#include "platform.h"
#include "extractor.h"
#include <exiv2/exif.hpp>
#include <exiv2/image.hpp>
#include <exiv2/futils.hpp>
#define SUPPRESS_WARNINGS 1
#define ADD(s, type) do { if (0!=proc(proc_cls, "exiv2", type, EXTRACTOR_METAFORMAT_UTF8, "text/plain", s, strlen(s)+1)) return 1; } while (0)
static int
addExiv2Tag(const Exiv2::ExifData& exifData,
const std::string& key,
enum EXTRACTOR_MetaType type,
EXTRACTOR_MetaDataProcessor proc,
void *proc_cls)
{
const char * str;
Exiv2::ExifKey ek(key);
Exiv2::ExifData::const_iterator md = exifData.findKey(ek);
if (md != exifData.end()) {
std::string ccstr = Exiv2::toString(*md);
str = ccstr.c_str();
while ( (strlen(str) > 0) && isspace((unsigned char) str[0])) str++;
if (strlen(str) > 0)
ADD (str, type);
md++;
}
return 0;
}
static int
addIptcData(const Exiv2::IptcData& iptcData,
const std::string& key,
enum EXTRACTOR_MetaType type,
EXTRACTOR_MetaDataProcessor proc,
void *proc_cls)
{
const char * str;
Exiv2::IptcKey ek(key);
Exiv2::IptcData::const_iterator md = iptcData.findKey(ek);
while (md != iptcData.end())
{
if (0 != strcmp (Exiv2::toString(md->key()).c_str(), key.c_str()))
break;
std::string ccstr = Exiv2::toString(*md);
str = ccstr.c_str();
while ( (strlen(str) > 0) && isspace( (unsigned char) str[0])) str++;
if (strlen(str) > 0)
ADD (str, type);
md++;
}
return 0;
}
static int
addXmpData(const Exiv2::XmpData& xmpData,
const std::string& key,
enum EXTRACTOR_MetaType type,
EXTRACTOR_MetaDataProcessor proc,
void *proc_cls)
{
const char * str;
Exiv2::XmpKey ek(key);
Exiv2::XmpData::const_iterator md = xmpData.findKey(ek);
while (md != xmpData.end())
{
if (0 != strcmp (Exiv2::toString(md->key()).c_str(), key.c_str()))
break;
std::string ccstr = Exiv2::toString(*md);
str = ccstr.c_str();
while ( (strlen(str) > 0) && isspace( (unsigned char) str[0])) str++;
if (strlen(str) > 0)
ADD (str, type);
md++;
}
return 0;
}
#define ADDEXIV(s,t) do { if (0 != addExiv2Tag (exifData, s, t, proc, proc_cls)) return 1; } while (0)
#define ADDIPTC(s,t) do { if (0 != addIptcData (iptcData, s, t, proc, proc_cls)) return 1; } while (0)
#define ADDXMP(s,t) do { if (0 != addXmpData (xmpData, s, t, proc, proc_cls)) return 1; } while (0)
extern "C" {
int
EXTRACTOR_exiv2_extract (const char *data,
size_t size,
EXTRACTOR_MetaDataProcessor proc,
void *proc_cls,
const char *options)
{
try
{
Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open( (Exiv2::byte*) data,
size);
if (image.get() == 0)
return 0;
image->readMetadata();
Exiv2::ExifData &exifData = image->exifData();
if (!exifData.empty())
{
Exiv2::ExifData::const_iterator md;
/* FIXME: this should be a loop over data,
not a looooong block of code */
ADDEXIV ("Exif.Image.Copyright", EXTRACTOR_METATYPE_COPYRIGHT);
ADDEXIV ("Exif.Photo.UserComment", EXTRACTOR_METATYPE_COMMENT);
ADDEXIV ("Exif.GPSInfo.GPSLatitudeRef", EXTRACTOR_METATYPE_GPS_LATITUDE_REF);
ADDEXIV ("Exif.GPSInfo.GPSLatitude", EXTRACTOR_METATYPE_GPS_LATITUDE);
ADDEXIV ("Exif.GPSInfo.GPSLongitudeRef", EXTRACTOR_METATYPE_GPS_LONGITUDE_REF);
ADDEXIV ("Exif.GPSInfo.GPSLongitude", EXTRACTOR_METATYPE_GPS_LONGITUDE);
ADDEXIV ("Exif.Image.Make", EXTRACTOR_METATYPE_CAMERA_MAKE);
ADDEXIV ("Exif.Image.Model", EXTRACTOR_METATYPE_CAMERA_MODEL);
ADDEXIV ("Exif.Image.Orientation", EXTRACTOR_METATYPE_ORIENTATION);
ADDEXIV ("Exif.Photo.DateTimeOriginal", EXTRACTOR_METATYPE_CREATION_DATE);
ADDEXIV ("Exif.Photo.ExposureBiasValue", EXTRACTOR_METATYPE_EXPOSURE_BIAS);
ADDEXIV ("Exif.Photo.Flash", EXTRACTOR_METATYPE_FLASH);
ADDEXIV ("Exif.CanonSi.FlashBias", EXTRACTOR_METATYPE_FLASH_BIAS);
ADDEXIV ("Exif.Panasonic.FlashBias", EXTRACTOR_METATYPE_FLASH_BIAS);
ADDEXIV ("Exif.Olympus.FlashBias", EXTRACTOR_METATYPE_FLASH_BIAS);
ADDEXIV ("Exif.Photo.FocalLength", EXTRACTOR_METATYPE_FOCAL_LENGTH);
ADDEXIV ("Exif.Photo.FocalLengthIn35mmFilm", EXTRACTOR_METATYPE_FOCAL_LENGTH_35MM);
ADDEXIV ("Exif.Photo.ISOSpeedRatings", EXTRACTOR_METATYPE_ISO_SPEED);
ADDEXIV ("Exif.CanonSi.ISOSpeed", EXTRACTOR_METATYPE_ISO_SPEED);
ADDEXIV ("Exif.Nikon1.ISOSpeed", EXTRACTOR_METATYPE_ISO_SPEED);
ADDEXIV ("Exif.Nikon2.ISOSpeed", EXTRACTOR_METATYPE_ISO_SPEED);
ADDEXIV ("Exif.Nikon3.ISOSpeed", EXTRACTOR_METATYPE_ISO_SPEED);
ADDEXIV ("Exif.Photo.ExposureProgram", EXTRACTOR_METATYPE_EXPOSURE_MODE);
ADDEXIV ("Exif.CanonCs.ExposureProgram", EXTRACTOR_METATYPE_EXPOSURE_MODE);
ADDEXIV ("Exif.Photo.MeteringMode", EXTRACTOR_METATYPE_METERING_MODE);
ADDEXIV ("Exif.CanonCs.Macro", EXTRACTOR_METATYPE_MACRO_MODE);
ADDEXIV ("Exif.Fujifilm.Macro", EXTRACTOR_METATYPE_MACRO_MODE);
ADDEXIV ("Exif.Olympus.Macro", EXTRACTOR_METATYPE_MACRO_MODE);
ADDEXIV ("Exif.Panasonic.Macro", EXTRACTOR_METATYPE_MACRO_MODE);
ADDEXIV ("Exif.CanonCs.Quality", EXTRACTOR_METATYPE_IMAGE_QUALITY);
ADDEXIV ("Exif.Fujifilm.Quality", EXTRACTOR_METATYPE_IMAGE_QUALITY);
ADDEXIV ("Exif.Sigma.Quality", EXTRACTOR_METATYPE_IMAGE_QUALITY);
ADDEXIV ("Exif.Nikon1.Quality", EXTRACTOR_METATYPE_IMAGE_QUALITY);
ADDEXIV ("Exif.Nikon2.Quality", EXTRACTOR_METATYPE_IMAGE_QUALITY);
ADDEXIV ("Exif.Nikon3.Quality", EXTRACTOR_METATYPE_IMAGE_QUALITY);
ADDEXIV ("Exif.Olympus.Quality", EXTRACTOR_METATYPE_IMAGE_QUALITY);
ADDEXIV ("Exif.Panasonic.Quality", EXTRACTOR_METATYPE_IMAGE_QUALITY);
ADDEXIV ("Exif.CanonSi.WhiteBalance", EXTRACTOR_METATYPE_WHITE_BALANCE);
ADDEXIV ("Exif.Fujifilm.WhiteBalance", EXTRACTOR_METATYPE_WHITE_BALANCE);
ADDEXIV ("Exif.Sigma.WhiteBalance", EXTRACTOR_METATYPE_WHITE_BALANCE);
ADDEXIV ("Exif.Nikon1.WhiteBalance", EXTRACTOR_METATYPE_WHITE_BALANCE);
ADDEXIV ("Exif.Nikon2.WhiteBalance", EXTRACTOR_METATYPE_WHITE_BALANCE);
ADDEXIV ("Exif.Nikon3.WhiteBalance", EXTRACTOR_METATYPE_WHITE_BALANCE);
ADDEXIV ("Exif.Olympus.WhiteBalance", EXTRACTOR_METATYPE_WHITE_BALANCE);
ADDEXIV ("Exif.Panasonic.WhiteBalance", EXTRACTOR_METATYPE_WHITE_BALANCE);
ADDEXIV ("Exif.Photo.FNumber", EXTRACTOR_METATYPE_APERTURE);
md = exifData.findKey(Exiv2::ExifKey("Exif.Photo.ApertureValue"));
if (md != exifData.end()) {
std::ostringstream os;
os << std::fixed << std::setprecision(1)
<< "F" << exp(log(2.0) * md->toFloat() / 2);
ADD (os.str().c_str(), EXTRACTOR_METATYPE_APERTURE);
}
ADDEXIV ("Exif.Photo.ExposureTime", EXTRACTOR_METATYPE_EXPOSURE);
md = exifData.findKey(Exiv2::ExifKey("Exif.Photo.ShutterSpeedValue"));
if (md != exifData.end()) {
double tmp = exp(log(2.0) * md->toFloat()) + 0.5;
std::ostringstream os;
if (tmp > 1) {
os << "1/" << static_cast<long>(tmp) << " s";
}
else {
os << static_cast<long>(1/tmp) << " s";
}
ADD (os.str().c_str(), EXTRACTOR_METATYPE_EXPOSURE);
}
/* this can sometimes be wrong (corrupt exiv2 data?).
Either way, we should get the data directly from
the specific file format parser (i.e. jpeg, tiff). */
// Exif Resolution
unsigned long xdim = 0;
unsigned long ydim = 0;
md = exifData.findKey(Exiv2::ExifKey("Exif.Photo.PixelXDimension"));
if (md != exifData.end()) xdim = md->toLong();
md = exifData.findKey(Exiv2::ExifKey("Exif.Photo.PixelYDimension"));
if (md != exifData.end()) ydim = md->toLong();
if ( (xdim != 0) && (ydim != 0))
{
std::ostringstream os;
os << xdim << "x" << ydim;
ADD (os.str().c_str(), EXTRACTOR_METATYPE_IMAGE_DIMENSIONS);
}
}
Exiv2::IptcData &iptcData = image->iptcData();
if (! iptcData.empty()) {
ADDIPTC ("Iptc.Application2.Keywords", EXTRACTOR_METATYPE_KEYWORDS);
ADDIPTC ("Iptc.Application2.City", EXTRACTOR_METATYPE_LOCATION_CITY);
ADDIPTC ("Iptc.Application2.SubLocation", EXTRACTOR_METATYPE_LOCATION_SUBLOCATION);
ADDIPTC ("Iptc.Application2.CountryName", EXTRACTOR_METATYPE_LOCATION_COUNTRY);
ADDIPTC ("Xmp.photoshop.Country", EXTRACTOR_METATYPE_RATING);
}
Exiv2::XmpData &xmpData = image->xmpData();
if (! xmpData.empty()) {
ADDXMP ("Xmp.photoshop.City", EXTRACTOR_METATYPE_LOCATION_CITY);
ADDXMP ("Xmp.xmp.Rating", EXTRACTOR_METATYPE_RATING);
ADDXMP ("Xmp.MicrosoftPhoto.Rating", EXTRACTOR_METATYPE_RATING);
ADDXMP ("Xmp.iptc.CountryCode", EXTRACTOR_METATYPE_LOCATION_COUNTRY_CODE);
ADDXMP ("Xmp.xmp.CreatorTool", EXTRACTOR_METATYPE_CREATED_BY_SOFTWARE);
ADDXMP ("Xmp.lr.hierarchicalSubject", EXTRACTOR_METATYPE_SUBJECT);
}
}
catch (const Exiv2::AnyError& e) {
#ifndef SUPPRESS_WARNINGS
std::cout << "Caught Exiv2 exception '" << e << "'\n";
#endif
}
return 0;
}
}
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