// ----------------------------------------------------------------------------
//   ___  ___  ___  ___       ___  ____  ___  _  _
//  /__/ /__/ /  / /__  /__/ /__    /   /_   / |/ /
// /    / \  /__/ ___/ ___/ ___/   /   /__  /    /  emulator
//
// ----------------------------------------------------------------------------
// Copyright 2005 Greg Stanton
// 
// 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., 675 Mass Ave, Cambridge, MA 02139, USA.
// ----------------------------------------------------------------------------
// TiaSound is Copyright(c) 1997 by Ron Fries                                
//                                                                           
// This library is free software; you can redistribute it and/or modify it   
// under the terms of version 2 of the GNU Library General Public License    
// as published by the Free Software Foundation.                             
//                                                                           
// 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 Library 
// General Public License for more details.                                  
// To obtain a copy of the GNU Library General Public License, write to the  
// Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.   
//                                                                           
// Any permitted reproduction of these routines, in whole or in part, must   
// bear this legend.                                                         
// ----------------------------------------------------------------------------
// Tia.h
// ----------------------------------------------------------------------------
#ifndef TIA_H
#define TIA_H

#include "Equates.h"

#include "shared.h"

#define SNDLENGTH (1024)

extern u16 tia_buffer[];

extern byte tia_audc[2];
extern byte tia_audf[2];
extern byte tia_audv[2];


extern void tia_Reset( );
extern void tia_SetRegister(word address, byte data);
extern void tia_Clear( );
extern void tia_Process(void);
extern u16 tia_ProcessNow(void);
extern byte tia_volume[2];
extern uint tia_counter[2];
extern uint tia_counterMax[2];
extern u16  tia_wait;
extern u32  myTiaBufIdx;


inline void tia_MemoryChannel(byte channel) 
{
  byte frequency = 0;
  if(tia_audc[channel] == 0) 
  {
    tia_volume[channel] = tia_audv[channel];
  }
  else 
  {
    frequency = tia_audf[channel] + 1;
    if(tia_audc[channel] > 11) 
    {
      frequency *= 3;
    }
  }

  if(frequency != tia_counterMax[channel]) 
  {
    tia_counterMax[channel] = frequency;
    if(tia_counter[channel] == 0 || frequency == 0)
    {
      tia_counter[channel] = frequency;
    }
  }
}

#endif