gambatte/common/rateest.h

/***************************************************************************
 *   Copyright (C) 2008 by Sindre Aamås                                    *
 *   aamas@stud.ntnu.no                                                    *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License version 2 as     *
 *   published by the Free Software Foundation.                            *
 *                                                                         *
 *   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 version 2 for more details.                *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   version 2 along with this program; if not, write to the               *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/
#ifndef RATEEST_H
#define RATEEST_H

#include "usec.h"

class RateEst {
public:
	struct Result {
		long est;
		long var;
	};
	
private:
	Result srate;
	usec_t last;
	long reference;
	long samples;
	unsigned count;
	
public:
	RateEst(long srate = 0) { init(srate); }
	RateEst(long srate, long reference) { init(srate, reference); }
	void init(long srate) { init(srate, srate); }
	void init(long srate, long reference);
	void feed(long samples);
	const Result& result() const { return srate; }
};

#endif