LutReader.cpp

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#include "LutReader.hpp"

#include <boost/filesystem/path.hpp>
#include <boost/tokenizer.hpp>
#include <boost/spirit/include/classic_core.hpp>
#include <boost/spirit/include/classic.hpp>
#include <boost/spirit/include/classic_assign_actor.hpp>
#include <boost/spirit/include/classic_core.hpp>
#include <boost/filesystem/fstream.hpp>

#include <algorithm>
#include <sstream>
#include <iostream>

namespace tuttle {

using namespace boost;
using namespace boost::spirit::classic;
namespace fs = boost::filesystem;

bool LutReader::read( const fs::path& filename )
{
        std::stringstream ss;
        fs::ifstream file;

        _data.clear();
        _steps.clear();

        file.open( filename, std::ios::in );
        ss << file.rdbuf();
        gram_3dl g( *this );
        parse_info<> info = parse( ss.str().c_str(), g >> eps_p );

        // Normalize values
        if( _data.size() > 0 )
        {
                double max  = *( max_element( _data.begin(), _data.end() ) );
                double norm = 1.0 / std::pow( 2.0, std::ceil( std::log( max ) / std::log( 2.0 ) ) );
                for( VectorDouble::iterator it = _data.begin(); it != _data.end(); ++it )
                {
                        ( *it ) *= norm;
                }
        }
        return _bReadOk = info.full;
}

} // namespace tuttle