wscompand.h

// wscompand.h
/*
This file is part of a program that implements a Software-Defined Radio.

Copyright (C) 2004, 2005, 2006 by Frank Brickle, AB2KT and Bob McGwier, N4HY

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

The authors can be reached by email at

ab2kt@arrl.net
or
rwmcgwier@comcast.net

or by paper mail at

The DTTS Microwave Society
6 Kathleen Place
Bridgewater, NJ 08807
*/

#ifndef _wscompand_h
#define _wscompand_h

#include <fromsys.h>
#include <defs.h>
#include <banal.h>
#include <splitfields.h>
#include <datatypes.h>
#include <bufvec.h>
#include <cxops.h>

typedef struct _wscompander
{
    int npts, nend;
    REAL fac, *tbl;
    CXB buff;
} WSCompanderInfo, *WSCompander;

extern void WSCompand(WSCompander wsc);

// fac < 0: compression
// fac > 0: expansion

extern void WSCReset(WSCompander wsc, REAL fac);
extern WSCompander newWSCompander(int npts, REAL fac, CXB buff);
extern void delWSCompander(WSCompander wsc);

#endif