/*
 * 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"
// #include "libavutil/internal.h"
// 
// /* 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 << (INT_BIT - bits)) >> (INT_BIT - bits);
// }
// #endif
// 
// #ifndef zero_extend
// static inline av_const unsigned zero_extend(unsigned 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
// 
// #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

#endif /* AVCODEC_MATHOPS_H */