Spline.h

/*
 * This file is part of libsidplayfp, a SID player engine.
 *
 * Copyright 2011-2015 Leandro Nini <drfiemost@users.sourceforge.net>
 * Copyright 2007-2010 Antti Lankila
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
 
#ifndef SPLINE_H
#define SPLINE_H
 
#include <cstddef>
#include <vector>
 
namespace reSIDfp
{
 
class Spline
{
public:
    typedef struct
    {
        double x;
        double y;
    } Point;
 
private:
    typedef struct
    {
        double x1;
        double x2;
        double a;
        double b;
        double c;
        double d;
    } Param;
 
    typedef std::vector<Param> ParamVector;
 
private:
    ParamVector params;
 
    mutable ParamVector::const_pointer c;
 
public:
    Spline(const Point input[], size_t inputLength);
 
    Point evaluate(double x) const;
};
 
} // namespace reSIDfp
 
#endif