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analopl.h

/*
 * Adplug - Replayer for many OPL2/OPL3 audio file formats.
 * Copyright (C) 1999, 2000, 2001 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
 *
 *
 * analopl.h - Spectrum analyzing hardware OPL, by Simon Peter (dn.tlp@gmx.net)
 */

#ifndef H_ANALOPL_DEFINED
#define H_ANALOPL_DEFINED

#include "opl.h"

#define DFL_ADLIBPORT   0x388       // default adlib baseport

class CAnalopl: public Copl
{
public:
      CAnalopl(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; };
      int getcarriervol(unsigned int v);              // get carrier volume of adlib voice v
      int getmodulatorvol(unsigned int v);            // get modulator volume of adlib voice v
      bool getkeyon(unsigned int v);

      // template methods
      void write(int reg, int val);
      void init();

private:
      void hardwrite(int reg, int val);   // write to OPL2 hardware registers

      unsigned short    adlport;                // adlib hardware baseport
      int                     hardvol,oldvol;         // hardware master volume
      bool              bequiet;                // quiet status cache
      char              hardvols[22][2];  // volume cache
      unsigned char     keyregs[9][2];                // shadow key register
      bool              nowrite;                // don't write to hardware, if true
};

#endif

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