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metacopy.cpp

Demonstrates copying metadata from one image to another

// SPDX-License-Identifier: GPL-2.0-or-later
#include <exiv2/exiv2.hpp>
// include local header files which are not part of libexiv2
#include "metacopy.hpp"
// *****************************************************************************
// Main
int main(int argc, char* const argv[]) {
try {
Exiv2::XmpParser::initialize();
::atexit(Exiv2::XmpParser::terminate);
// Handle command line arguments
Params params;
if (params.getopt(argc, argv)) {
params.usage();
return 1;
}
if (params.help_) {
params.help();
return 2;
}
// Use MemIo to increase test coverage.
Exiv2::FileIo fileIo(params.read_);
auto memIo = std::make_unique<Exiv2::MemIo>();
memIo->transfer(fileIo);
auto readImg = Exiv2::ImageFactory::open(std::move(memIo));
readImg->readMetadata();
auto writeImg = Exiv2::ImageFactory::open(params.write_);
if (params.preserve_) {
writeImg->readMetadata();
}
if (params.iptc_) {
writeImg->setIptcData(readImg->iptcData());
}
if (params.exif_) {
writeImg->setExifData(readImg->exifData());
}
if (params.comment_) {
writeImg->setComment(readImg->comment());
}
if (params.xmp_) {
writeImg->setXmpData(readImg->xmpData());
}
try {
writeImg->writeMetadata();
} catch (const Exiv2::Error&) {
std::cerr << params.progname() << ": Could not write metadata to (" << params.write_ << ")\n";
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
} catch (Exiv2::Error& e) {
std::cerr << "Caught Exiv2 exception '" << e << "'\n";
return EXIT_FAILURE;
}
}
int Params::option(int opt, const std::string& /*optarg*/, int optopt) {
int rc = 0;
switch (opt) {
case 'h': {
help_ = true;
break;
}
case 'i': {
iptc_ = true;
break;
}
case 'e': {
exif_ = true;
break;
}
case 'c': {
comment_ = true;
break;
}
case 'x': {
xmp_ = true;
break;
}
case 'p': {
preserve_ = true;
break;
}
case 'a': {
iptc_ = true;
exif_ = true;
comment_ = true;
xmp_ = true;
break;
}
case ':': {
std::cerr << progname() << ": Option -" << static_cast<char>(optopt) << " requires an argument\n";
rc = 1;
break;
}
case '?': {
std::cerr << progname() << ": Unrecognized option -" << static_cast<char>(optopt) << "\n";
rc = 1;
break;
}
default: {
std::cerr << progname() << ": getopt returned unexpected character code " << std::hex << opt << "\n";
rc = 1;
break;
}
}
return rc;
}
int Params::nonoption(const std::string& argv) {
if (!write_.empty()) {
std::cerr << progname() << ": Unexpected extra argument (" << argv << ")\n";
return 1;
}
if (first_)
read_ = argv;
else
write_ = argv;
first_ = false;
return 0;
}
int Params::getopt(int argc, char* const argv[]) {
int rc = Util::Getopt::getopt(argc, argv, optstring_);
// Further consistency checks
if (!help_) {
if (rc == 0 && read_.empty()) {
std::cerr << progname() << ": Read and write files must be specified\n";
rc = 1;
}
if (rc == 0 && write_.empty()) {
std::cerr << progname() << ": Write file must be specified\n";
rc = 1;
}
if (preserve_ && iptc_ && exif_ && comment_ && xmp_) {
std::cerr << progname() << ": Option -p has no effect when all metadata types are specified.\n";
rc = 1;
}
}
return rc;
} // Params::getopt
void Params::usage(std::ostream& os) const {
os << "\nReads and writes raw metadata. Use -h option for help.\n"
<< "Usage: " << progname() << " [-iecxaph] readfile writefile\n";
}
void Params::help(std::ostream& os) const {
usage(os);
os << "\nOptions:\n"
<< " -i Read Iptc data from readfile and write to writefile.\n"
<< " -e Read Exif data from readfile and write to writefile.\n"
<< " -c Read Jpeg comment from readfile and write to writefile.\n"
<< " -x Read XMP data from readfile and write to writefile.\n"
<< " -a Read all metadata from readfile and write to writefile.\n"
<< " -p Preserve existing metadata in writefile if not replaced.\n"
<< " -h Display this help and exit.\n\n";
} // Params::help
Exiv2::Error
Simple error class used for exceptions. An output operator is provided to print errors to a stream.
Definition error.hpp:236
Exiv2::FileIo
Provides binary file IO by implementing the BasicIo interface.
Definition basicio.hpp:284
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:804
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