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fastrig.h
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fastrig.h
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/* fastrig.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
or
or by paper mail at
The DTTS Microwave Society
6 Kathleen Place
Bridgewater, NJ 08807
*/
#ifndef _fastrig_h
#define _fastrig_h
#include <fromsys.h>
#include <banal.h>
#include <splitfields.h>
#include <datatypes.h>
#include <bufvec.h>
#ifdef notdef
#include <cxops.h>
#endif
#define SIN_TABLE_SIZE 4096
#define SIN_TABLE_SIZE_M1 4095
/* **********************************************
* TRIG_SPEED:
* 0 = normal (slow);
* 1 = table look up with interpolation (medium);
* 2 = table look up (fast)
* ***********************************************/
/* Interpolation is ALWAYS done on atan2. The setting
only applies to sin and cos */
#ifndef TRIG_SPEED
#define TRIG_SPEED 0
#endif
#if (TRIG_SPEED == 2)
#define SIN(x) fast_sin(x)
#define COS(x) fast_cos(x)
#define ATAN2(x,y) fast_atan2((x),(y))
#elif (TRIG_SPEED == 1)
#define SIN(x) fast_sin(x)
#define COS(x) fast_cos(x)
#define ATAN2(x,y) fast_atan2((x),(y))
#elif (TRIG_SPEED == 0)
#define SIN(x) (REAL)sin((REAL)x)
#define COS(x) (REAL)cos((REAL)x)
#define ATAN2(x,y) (REAL)atan2((REAL)(x),(REAL)(y))
#endif
#ifndef PI
#define PI M_PI
#endif /* PI */
#ifndef TWOPI
#define TWOPI (2.0 * PI)
#endif
#ifndef ONE_OVER_TWOPI
#define ONE_OVER_TWOPI (0.159154943091895)
#endif
#if (TRIG_SPEED != 0)
extern void InitSPEEDTRIG(void);
extern REAL fast_sin(REAL);
extern REAL fast_cos(REAL);
extern REAL fast_atan2(REAL, REAL);
#endif
#endif