mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
182 lines
4.1 KiB
182 lines
4.1 KiB
/* |
|
* simple math operations |
|
* Copyright (c) 2001, 2002 Fabrice Bellard |
|
* Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> et al |
|
* |
|
* This file is part of FFmpeg. |
|
* |
|
* FFmpeg is free software; you can redistribute it and/or |
|
* modify it under the terms of the GNU Lesser General Public |
|
* License as published by the Free Software Foundation; either |
|
* version 2.1 of the License, or (at your option) any later version. |
|
* |
|
* FFmpeg 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 |
|
* Lesser General Public License for more details. |
|
* |
|
* You should have received a copy of the GNU Lesser General Public |
|
* License along with FFmpeg; if not, write to the Free Software |
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
|
*/ |
|
#ifndef AVCODEC_MATHOPS_H |
|
#define AVCODEC_MATHOPS_H |
|
|
|
#include "libavutil/common.h" |
|
|
|
#if ARCH_ARM |
|
# include "arm/mathops.h" |
|
#elif ARCH_AVR32 |
|
# include "avr32/mathops.h" |
|
#elif ARCH_BFIN |
|
# include "bfin/mathops.h" |
|
#elif ARCH_MIPS |
|
# include "mips/mathops.h" |
|
#elif ARCH_PPC |
|
# include "ppc/mathops.h" |
|
#elif ARCH_X86 |
|
# include "x86/mathops.h" |
|
#endif |
|
|
|
/* generic implementation */ |
|
|
|
#ifndef MULL |
|
# define MULL(a,b,s) (((int64_t)(a) * (int64_t)(b)) >> (s)) |
|
#endif |
|
|
|
#ifndef MULH |
|
//gcc 3.4 creates an incredibly bloated mess out of this |
|
//# define MULH(a,b) (((int64_t)(a) * (int64_t)(b))>>32) |
|
|
|
static av_always_inline int MULH(int a, int b){ |
|
return ((int64_t)(a) * (int64_t)(b))>>32; |
|
} |
|
#endif |
|
|
|
#ifndef UMULH |
|
static av_always_inline unsigned UMULH(unsigned a, unsigned b){ |
|
return ((uint64_t)(a) * (uint64_t)(b))>>32; |
|
} |
|
#endif |
|
|
|
#ifndef MUL64 |
|
# define MUL64(a,b) ((int64_t)(a) * (int64_t)(b)) |
|
#endif |
|
|
|
#ifndef MAC64 |
|
# define MAC64(d, a, b) ((d) += MUL64(a, b)) |
|
#endif |
|
|
|
#ifndef MLS64 |
|
# define MLS64(d, a, b) ((d) -= MUL64(a, b)) |
|
#endif |
|
|
|
/* signed 16x16 -> 32 multiply add accumulate */ |
|
#ifndef MAC16 |
|
# define MAC16(rt, ra, rb) rt += (ra) * (rb) |
|
#endif |
|
|
|
/* signed 16x16 -> 32 multiply */ |
|
#ifndef MUL16 |
|
# define MUL16(ra, rb) ((ra) * (rb)) |
|
#endif |
|
|
|
#ifndef MLS16 |
|
# define MLS16(rt, ra, rb) ((rt) -= (ra) * (rb)) |
|
#endif |
|
|
|
/* median of 3 */ |
|
#ifndef mid_pred |
|
#define mid_pred mid_pred |
|
static inline av_const int mid_pred(int a, int b, int c) |
|
{ |
|
#if 0 |
|
int t= (a-b)&((a-b)>>31); |
|
a-=t; |
|
b+=t; |
|
b-= (b-c)&((b-c)>>31); |
|
b+= (a-b)&((a-b)>>31); |
|
|
|
return b; |
|
#else |
|
if(a>b){ |
|
if(c>b){ |
|
if(c>a) b=a; |
|
else b=c; |
|
} |
|
}else{ |
|
if(b>c){ |
|
if(c>a) b=c; |
|
else b=a; |
|
} |
|
} |
|
return b; |
|
#endif |
|
} |
|
#endif |
|
|
|
#ifndef sign_extend |
|
static inline av_const int sign_extend(int val, unsigned bits) |
|
{ |
|
return (val << ((8 * sizeof(int)) - bits)) >> ((8 * sizeof(int)) - bits); |
|
} |
|
#endif |
|
|
|
#ifndef zero_extend |
|
static inline av_const unsigned zero_extend(unsigned val, unsigned bits) |
|
{ |
|
return (val << ((8 * sizeof(int)) - bits)) >> ((8 * sizeof(int)) - bits); |
|
} |
|
#endif |
|
|
|
#ifndef COPY3_IF_LT |
|
#define COPY3_IF_LT(x, y, a, b, c, d)\ |
|
if ((y) < (x)) {\ |
|
(x) = (y);\ |
|
(a) = (b);\ |
|
(c) = (d);\ |
|
} |
|
#endif |
|
|
|
#ifndef NEG_SSR32 |
|
# define NEG_SSR32(a,s) ((( int32_t)(a))>>(32-(s))) |
|
#endif |
|
|
|
#ifndef NEG_USR32 |
|
# define NEG_USR32(a,s) (((uint32_t)(a))>>(32-(s))) |
|
#endif |
|
|
|
#if HAVE_BIGENDIAN |
|
# ifndef PACK_2U8 |
|
# define PACK_2U8(a,b) (((a) << 8) | (b)) |
|
# endif |
|
# ifndef PACK_4U8 |
|
# define PACK_4U8(a,b,c,d) (((a) << 24) | ((b) << 16) | ((c) << 8) | (d)) |
|
# endif |
|
# ifndef PACK_2U16 |
|
# define PACK_2U16(a,b) (((a) << 16) | (b)) |
|
# endif |
|
#else |
|
# ifndef PACK_2U8 |
|
# define PACK_2U8(a,b) (((b) << 8) | (a)) |
|
# endif |
|
# ifndef PACK_4U2 |
|
# define PACK_4U8(a,b,c,d) (((d) << 24) | ((c) << 16) | ((b) << 8) | (a)) |
|
# endif |
|
# ifndef PACK_2U16 |
|
# define PACK_2U16(a,b) (((b) << 16) | (a)) |
|
# endif |
|
#endif |
|
|
|
#ifndef PACK_2S8 |
|
# define PACK_2S8(a,b) PACK_2U8((a)&255, (b)&255) |
|
#endif |
|
#ifndef PACK_4S8 |
|
# define PACK_4S8(a,b,c,d) PACK_4U8((a)&255, (b)&255, (c)&255, (d)&255) |
|
#endif |
|
#ifndef PACK_2S16 |
|
# define PACK_2S16(a,b) PACK_2U16((a)&0xffff, (b)&0xffff) |
|
#endif |
|
|
|
#endif /* AVCODEC_MATHOPS_H */ |
|
|
|
|