// ***************************************************************** -*- C++ -*-

// xmpprint.cpp

// Read an XMP from a video or graphic file, parse it and print 

// all (known) properties.

// ========================================================================

// Linux standalone compilation : 

//      g++ -o xmprint xmprint.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);

  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;

  }

}