/* * 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 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 << (INT_BIT - bits)) >> (INT_BIT - 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 #endif /* AVCODEC_MATHOPS_H */