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xmpprint.cpp

Read an XMP from a file, parse it and print all (known) properties

// ***************************************************************** -*- C++ -*-
/*
* Copyright (C) 2004-2021 Exiv2 authors
* This program is part of the Exiv2 distribution.
*
* 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., 51 Franklin Street, 5th Floor, Boston, MA 02110-1301 USA.
*/
// xmpprint.cpp
// Read an XMP from a video or graphic file, parse it and print
// all (known) properties.
// ========================================================================
// Linux standalone compilation :
// g++ -o xmpprint xmpprint.cpp `pkg-config --cflags --libs exiv2`
// ========================================================================
#include <exiv2/exiv2.hpp>
#include <string>
#include <iostream>
#include <iomanip>
#include <cassert>
int main(int argc, char** argv)
{
Exiv2::XmpParser::initialize();
::atexit(Exiv2::XmpParser::terminate);
#ifdef EXV_ENABLE_BMFF
Exiv2::enableBMFF();
#endif
try
{
if (argc != 2)
{
std::cout << "Usage: " << argv[0] << " file\n";
return 1;
}
Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open(argv[1]);
assert (image.get() != 0);
image->readMetadata();
Exiv2::XmpData &xmpData = image->xmpData();
if (xmpData.empty()) {
std::string error(argv[1]);
error += ": No XMP data found in the file";
throw Exiv2::Error(Exiv2::kerErrorMessage, error);
}
if (xmpData.empty())
{
std::string error(argv[1]);
error += ": No XMP properties found in the XMP packet";
throw Exiv2::Error(Exiv2::kerErrorMessage, error);
}
for (Exiv2::XmpData::const_iterator md = xmpData.begin();
md != xmpData.end(); ++md)
{
std::cout << std::setfill(' ') << std::left
<< std::setw(44)
<< md->key() << " "
<< std::setw(9) << std::setfill(' ') << std::left
<< md->typeName() << " "
<< std::dec << std::setw(3)
<< std::setfill(' ') << std::right
<< md->count() << " "
<< std::dec << md->toString()
<< std::endl;
}
Exiv2::XmpParser::terminate();
return 0;
}
catch (Exiv2::AnyError& e)
{
std::cout << "Caught Exiv2 exception '" << e << "'\n";
return -1;
}
}
Exiv2::AnyError
Error class interface. Allows the definition and use of a hierarchy of error classes which can all be...
Definition error.hpp:174
Exiv2::ImageFactory::open
static Image::AutoPtr open(const std::string &path, bool useCurl=true)
Create an Image subclass of the appropriate type by reading the specified file. Image type is derived...
Definition image.cpp:924
Exiv2::Image::AutoPtr
std::auto_ptr< Image > AutoPtr
Image auto_ptr type.
Definition image.hpp:81
Exiv2::XmpData
A container for XMP data. This is a top-level class of the Exiv2 library.
Definition xmp_exiv2.hpp:166
Exiv2::XmpData::empty
bool empty() const
Return true if there is no XMP metadata.
Definition xmp.cpp:528
Exiv2::XmpData::end
iterator end()
End of the metadata.
Definition xmp.cpp:543
Exiv2::XmpData::const_iterator
XmpMetadata::const_iterator const_iterator
XmpMetadata const iterator type.
Definition xmp_exiv2.hpp:174
Exiv2::XmpData::begin
iterator begin()
Begin of the metadata.
Definition xmp.cpp:538
Exiv2::XmpParser::initialize
static bool initialize(XmpParser::XmpLockFct xmpLockFct=0, void *pLockData=0)
Initialize the XMP Toolkit.
Definition xmp.cpp:641
Exiv2::XmpParser::terminate
static void terminate()
Terminate the XMP Toolkit and unregister custom namespaces.
Definition xmp.cpp:703
Exiv2::Error
BasicError< char > Error
Error class used for exceptions (std::string based)
Definition error.hpp:324