SID.h

/*
 * This file is part of libsidplayfp, a SID player engine.
 *
 *  Copyright (C) 2025-2026 Leandro Nini
 *
 *  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
 */
 
// Based on cRSID lightweight RealSID by Hermit (Mihaly Horvath)
 
#ifndef SIDLITE_SID_H
#define SIDLITE_SID_H
 
#include "ADSR.h"
#include "Filter.h"
#include "WavGen.h"
#include "sl_settings.h"
 
#include <array>
 
namespace SIDLite
{
 
class SID
{
public:
    enum class model_t
    {
        MOS6581,
        MOS8580
    };
 
public:
    SID();
    void reset();
    void write(int addr, int value);
    int read(int addr) const;
    int clock(unsigned int cycles, short* buf);
 
    void setChipModel(model_t model);
    void setRealSIDmode(bool mode);
    bool setSamplingParameters(unsigned int clockFrequency, unsigned short samplingFrequency);
 
    int getLevel() const { return filter.getLevel(); }
 
private:
    unsigned char regs[0x20] = {0};
 
    ADSR              adsr;
    Filter            filter;
    WavGen            wavgen;
    settings          s;
 
    short             SampleCycleCnt;
 
private:
    inline bool generateSample(unsigned int &cycles, short &output);
};
 
}
 
#endif // SIDLITE_SID_H