/***************************************************************************
 *   Copyright (C) 2004 by Johan Maes - ON4QZ                              *
 *   on4qz@telenet.be                                                      *
 *   http://users.telenet.be/on4qz                                         *
 *                                                                         *
 *   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.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/
#ifndef SYNTHES_H
#define SYNTHES_H
#include <math.h>

#define SINTABLEN 1024

class synthesizer
{
public:
	synthesizer(double txSmpClock);
	~synthesizer();
	short int nextSample(double freq)
		{
  		double temp;
  		int t;
  		short int i;
			previousAngle=oldAngle;
  		temp=(freq/txSamplingClock)*(double)SINTABLEN+oldAngle;
  		oldAngle=fmod(temp,SINTABLEN);
  		t=(int)(oldAngle+0.5);
  		//t=(int)(oldAngle);
  		i=sineTable[t%SINTABLEN];
  		return i;
		} 
/*	short int nextSample(double )
		{
			if((counter%10)==0)
				{
					if (state==-1) state=1;
					else state=-1;
				}
			counter++;
			return state*20000;
		}	*/
		
	void unget()
		{
			oldAngle=previousAngle;
/*			counter--;
			if((counter%10)==0)
				{
					if (state==-1) state=1;
					else state=-1;
				}*/
			
		}
private:
	double txSamplingClock;
	double oldAngle;
	double previousAngle;
	short int sineTable[SINTABLEN];
/*	int counter;
	int state;*/
};



#endif