realopl.h

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/*
 * AdPlug - Replayer for many OPL2/OPL3 audio file formats.
 * Copyright (C) 1999 - 2005 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * realopl.h - Real hardware OPL, by Simon Peter <dn.tlp@gmx.net>
 *           - Linux support by Tomas Pollak <tomas@forkhq.com>
 */
 
#ifndef H_ADPLUG_REALOPL
#define H_ADPLUG_REALOPL
 
#include "opl.h"
 
#define DFL_ADLIBPORT 0x388 // default adlib baseport
 
class CRealopl: public Copl {
 public:
  CRealopl(unsigned short initport = DFL_ADLIBPORT); // initport = OPL2 hardware baseport
 
  bool detect();                      // returns true if adlib compatible board is found, else false
  void setvolume(int volume);         // set adlib master volume (0 - 63) 0 = loudest, 63 = softest
  void setquiet(bool quiet = true);   // sets the OPL2 quiet, while still writing to the registers
 
  void setport(unsigned short port) { // set new OPL2 hardware baseport
    adlport = port;
  }
 
  void setnowrite(bool nw = true) { // set hardware write status
    nowrite = nw;
  }
 
  int getvolume() { // get adlib master volume
    return hardvol;
  }
 
  // template methods
  void write(int reg, int val);
  void init();
  void settype(ChipType type) {
    currType = type;
  }
 
 protected:
  void hardwrite(int reg, int val);   // write to OPL2 hardware registers
  bool harddetect();                  // do real hardware detection
 
  // the 9 operators as expected by the OPL2
  static const unsigned char op_table[9];
 
  unsigned short  adlport;            // adlib hardware baseport
  int             hardvol, oldvol;    // hardware master volume
  bool            bequiet;            // quiet status cache
  char            hardvols[2][22][2]; // volume cache
  bool            nowrite;            // don't write to hardware, if true
#ifdef linux
  bool            gotperms;           // if we've requested ioperms yet
#endif
};
 
#endif