SDLPAL/adplug/opl.h

/*
 * Adplug - Replayer for many OPL2/OPL3 audio file formats.
 * Copyright (C) 1999 - 2007 Simon Peter, <dn.tlp@gmx.net>, et al.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * opl.h - OPL base class, by Simon Peter <dn.tlp@gmx.net>
 */

#ifndef H_ADPLUG_OPL
#define H_ADPLUG_OPL

class Copl {
public:
   typedef enum {
      TYPE_OPL2, TYPE_OPL3, TYPE_DUAL_OPL2
   } ChipType;

   Copl()
         : currChip(0), currType(TYPE_OPL2) {
   }

   virtual ~Copl() {
   }

   virtual void write(int reg, int val) {} // combined register select + data write
   virtual void setchip(int n) { // select OPL chip
      if (n < 2)
         currChip = n;
   }

   virtual int getchip() { // returns current OPL chip
      return currChip;
   }

   virtual void init(void) {} // reinitialize OPL chip(s)

   // return this OPL chip's type
   ChipType gettype() {
      return currType;
   }

   // Emulation only: fill buffer
   virtual void update(short *buf, int samples) {}

protected:
   int		currChip;		// currently selected OPL chip number
   ChipType	currType;		// this OPL chip's type
};

#endif