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xmpprint.cpp

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

// SPDX-License-Identifier: GPL-2.0-or-later
// Read an XMP from a video or graphic file, parse it and print all (known) properties.
#include <exiv2/exiv2.hpp>
#include <iomanip>
#include <iostream>
#include <string>
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 EXIT_FAILURE;
}
auto image = Exiv2::ImageFactory::open(argv[1]);
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::ErrorCode::kerErrorMessage, error);
}
if (xmpData.empty()) {
std::string error(argv[1]);
error += ": No XMP properties found in the XMP packet";
throw Exiv2::Error(Exiv2::ErrorCode::kerErrorMessage, error);
}
for (auto&& md : xmpData) {
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 EXIT_SUCCESS;
} catch (Exiv2::Error& e) {
std::cout << "Caught Exiv2 exception '" << e << "'\n";
return EXIT_FAILURE;
}
}
Exiv2::Error
Simple error class used for exceptions. An output operator is provided to print errors to a stream.
Definition error.hpp:236
Exiv2::ImageFactory::open
static Image::UniquePtr 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:820
Exiv2::XmpData
A container for XMP data. This is a top-level class of the Exiv2 library.
Definition xmp_exiv2.hpp:138
Exiv2::XmpData::empty
bool empty() const
Return true if there is no XMP metadata.
Definition xmp.cpp:464
Exiv2::XmpParser::initialize
static bool initialize(XmpParser::XmpLockFct xmpLockFct=nullptr, void *pLockData=nullptr)
Initialize the XMP Toolkit.
Definition xmp.cpp:568
Exiv2::XmpParser::terminate
static void terminate()
Terminate the XMP Toolkit and unregister custom namespaces.
Definition xmp.cpp:623