xmpparse.cpp

Read an XMP packet 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.
*/
// xmpparse.cpp
// Read an XMP packet from a file, parse it and print all (known) properties.
#include <exiv2/exiv2.hpp>
#include <string>
#include <iostream>
#include <iomanip>
int main(int argc, char* const argv[])
try {
Exiv2::XmpParser::initialize();
::atexit(Exiv2::XmpParser::terminate);
#ifdef EXV_ENABLE_BMFF
Exiv2::enableBMFF();
#endif
if (argc != 2) {
std::cout << "Usage: " << argv[0] << " file\n";
return 1;
}
Exiv2::DataBuf buf = Exiv2::readFile(argv[1]);
std::string xmpPacket;
xmpPacket.assign(reinterpret_cast<char*>(buf.pData_), buf.size_);
Exiv2::XmpData xmpData;
if (0 != Exiv2::XmpParser::decode(xmpData, xmpPacket)) {
std::string error(argv[1]);
error += ": Failed to parse file contents (XMP packet)";
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::DataBuf
Utility class containing a character array. All it does is to take care of memory allocation and dele...
Definition: types.hpp:193
Exiv2::DataBuf::size_
long size_
The current size of the buffer.
Definition: types.hpp:260
Exiv2::DataBuf::pData_
byte * pData_
Pointer to the buffer, 0 if none has been allocated.
Definition: types.hpp:258
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::decode
static int decode(XmpData &xmpData, const std::string &xmpPacket)
Decode XMP metadata from an XMP packet xmpPacket into xmpData. The format of the XMP packet must foll...
Definition: xmp.cpp:887
Exiv2::XmpParser::terminate
static void terminate()
Terminate the XMP Toolkit and unregister custom namespaces.
Definition: xmp.cpp:703
Exiv2::readFile
EXIV2API DataBuf readFile(const std::string &path)
Read file path into a DataBuf, which is returned.
Definition: basicio.cpp:2665
Exiv2::Error
BasicError< char > Error
Error class used for exceptions (std::string based)
Definition: error.hpp:324