//for diagnostic
void PrintTag(Exiv2::ExifData::iterator itr)
{
std::cout << itr->value() << " (" << itr->typeName() << ", size: " << itr->count() << ")" << std::endl;
if(itr->count()>1)
{
std::cout << "[";
for(long i=0; i<itr->count(); i++)
{
std::cout << itr->toFloat(i) << ",";
}
std::cout << "]" << std::endl;
};
};
bool _getExiv2Value(Exiv2::ExifData& exifData, std::string keyName, float & value)
{
Exiv2::ExifData::iterator itr = exifData.findKey(Exiv2::ExifKey(keyName));
if (itr != exifData.end() && itr->count())
{
value = itr->toFloat();
return true;
}
else
{
return false;
};
};
bool _getExiv2Value(Exiv2::ExifData& exifData, uint16_t tagID, std::string groupName, double & value)
{
Exiv2::ExifData::iterator itr = exifData.findKey(Exiv2::ExifKey(tagID, groupName));
if (itr != exifData.end() && itr->count())
{
value = itr->toFloat();
return true;
}
else
{
return false;
}
}
bool _getExiv2Value(Exiv2::ExifData& exifData, std::string keyName, std::vector<float> & values)
{
values.clear();
Exiv2::ExifData::iterator itr = exifData.findKey(Exiv2::ExifKey(keyName));
if (itr != exifData.end() && itr->count())
{
for(long i=0; i<itr->count(); i++)
{
values.push_back(itr->toFloat(i));
};
return true;
}
else
{
return false;
}
}