mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-21 07:46:38 +00:00
58 lines
1.7 KiB
C
58 lines
1.7 KiB
C
/* Goom Project
|
|
* Copyright (C) <2003> Jean-Christophe Hoelt <jeko@free.fr>
|
|
*
|
|
* goom_core.c:Contains the core of goom's work.
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* 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.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#ifndef MATHTOOLS_H
|
|
#define MATHTOOLS_H
|
|
|
|
#include <glib.h>
|
|
|
|
#define _double2fixmagic (68719476736.0*1.5)
|
|
/* 2^36 * 1.5, (52-_shiftamt=36) uses limited precisicion to floor */
|
|
#define _shiftamt 16
|
|
/* 16.16 fixed point representation */
|
|
|
|
#if G_BYTE_ORDER == G_BIG_ENDIAN
|
|
#define iexp_ 0
|
|
#define iman_ 1
|
|
#else
|
|
#define iexp_ 1
|
|
#define iman_ 0
|
|
#endif /* BigEndian_ */
|
|
|
|
/* TODO: this optimization is very efficient: put it again when all works
|
|
#ifdef HAVE_MMX
|
|
#define F2I(dbl,i) {double d = dbl + _double2fixmagic; i = ((int*)&d)[iman_] >> _shiftamt;}
|
|
#else*/
|
|
#define F2I(dbl,i) i=(int)dbl;
|
|
/*#endif*/
|
|
|
|
#if 0
|
|
#define SINCOS(f,s,c) \
|
|
__asm__ __volatile__ ("fsincos" : "=t" (c), "=u" (s) : "0" (f))
|
|
#else
|
|
#define SINCOS(f,s,c) {s=sin(f);c=cos(f);}
|
|
#endif
|
|
|
|
extern float sin256[256];
|
|
extern float cos256[256];
|
|
|
|
#endif
|
|
|