apps/codecs/libwmavoice/mathops.h

   1 /*
   2  * simple math operations
   3  * Copyright (c) 2001, 2002 Fabrice Bellard
   4  * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> et al
   5  *
   6  * This file is part of FFmpeg.
   7  *
   8  * FFmpeg is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * FFmpeg is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with FFmpeg; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22 #ifndef AVCODEC_MATHOPS_H
  23 #define AVCODEC_MATHOPS_H
  24
  25 #include "libavutil/common.h"
  26
  27 #if   ARCH_ARM
  28 #   include "arm/mathops.h"
  29 #elif ARCH_AVR32
  30 #   include "avr32/mathops.h"
  31 #elif ARCH_BFIN
  32 #   include "bfin/mathops.h"
  33 #elif ARCH_MIPS
  34 #   include "mips/mathops.h"
  35 #elif ARCH_PPC
  36 #   include "ppc/mathops.h"
  37 #elif ARCH_X86
  38 #   include "x86/mathops.h"
  39 #endif
  40
  41 /* generic implementation */
  42
  43 #ifndef MULL
  44 #   define MULL(a,b,s) (((int64_t)(a) * (int64_t)(b)) >> (s))
  45 #endif
  46
  47 #ifndef MULH
  48 //gcc 3.4 creates an incredibly bloated mess out of this
  49 //#    define MULH(a,b) (((int64_t)(a) * (int64_t)(b))>>32)
  50
  51 static av_always_inline int MULH(int a, int b){
  52     return ((int64_t)(a) * (int64_t)(b))>>32;
  53 }
  54 #endif
  55
  56 #ifndef UMULH
  57 static av_always_inline unsigned UMULH(unsigned a, unsigned b){
  58     return ((uint64_t)(a) * (uint64_t)(b))>>32;
  59 }
  60 #endif
  61
  62 #ifndef MUL64
  63 #   define MUL64(a,b) ((int64_t)(a) * (int64_t)(b))
  64 #endif
  65
  66 #ifndef MAC64
  67 #   define MAC64(d, a, b) ((d) += MUL64(a, b))
  68 #endif
  69
  70 #ifndef MLS64
  71 #   define MLS64(d, a, b) ((d) -= MUL64(a, b))
  72 #endif
  73
  74 /* signed 16x16 -> 32 multiply add accumulate */
  75 #ifndef MAC16
  76 #   define MAC16(rt, ra, rb) rt += (ra) * (rb)
  77 #endif
  78
  79 /* signed 16x16 -> 32 multiply */
  80 #ifndef MUL16
  81 #   define MUL16(ra, rb) ((ra) * (rb))
  82 #endif
  83
  84 #ifndef MLS16
  85 #   define MLS16(rt, ra, rb) ((rt) -= (ra) * (rb))
  86 #endif
  87
  88 /* median of 3 */
  89 #ifndef mid_pred
  90 #define mid_pred mid_pred
  91 static inline av_const int mid_pred(int a, int b, int c)
  92 {
  93 #if 0
  94     int t= (a-b)&((a-b)>>31);
  95     a-=t;
  96     b+=t;
  97     b-= (b-c)&((b-c)>>31);
  98     b+= (a-b)&((a-b)>>31);
  99
 100     return b;
 101 #else
 102     if(a>b){
 103         if(c>b){
 104             if(c>a) b=a;
 105             else    b=c;
 106         }
 107     }else{
 108         if(b>c){
 109             if(c>a) b=c;
 110             else    b=a;
 111         }
 112     }
 113     return b;
 114 #endif
 115 }
 116 #endif
 117
 118 #ifndef sign_extend
 119 static inline av_const int sign_extend(int val, unsigned bits)
 120 {
 121     return (val << ((8 * sizeof(int)) - bits)) >> ((8 * sizeof(int)) - bits);
 122 }
 123 #endif
 124
 125 #ifndef zero_extend
 126 static inline av_const unsigned zero_extend(unsigned val, unsigned bits)
 127 {
 128     return (val << ((8 * sizeof(int)) - bits)) >> ((8 * sizeof(int)) - bits);
 129 }
 130 #endif
 131
 132 #ifndef COPY3_IF_LT
 133 #define COPY3_IF_LT(x, y, a, b, c, d)\
 134 if ((y) < (x)) {\
 135     (x) = (y);\
 136     (a) = (b);\
 137     (c) = (d);\
 138 }
 139 #endif
 140
 141 #ifndef NEG_SSR32
 142 #   define NEG_SSR32(a,s) ((( int32_t)(a))>>(32-(s)))
 143 #endif
 144
 145 #ifndef NEG_USR32
 146 #   define NEG_USR32(a,s) (((uint32_t)(a))>>(32-(s)))
 147 #endif
 148
 149 #if HAVE_BIGENDIAN
 150 # ifndef PACK_2U8
 151 #   define PACK_2U8(a,b)     (((a) <<  8) | (b))
 152 # endif
 153 # ifndef PACK_4U8
 154 #   define PACK_4U8(a,b,c,d) (((a) << 24) | ((b) << 16) | ((c) << 8) | (d))
 155 # endif
 156 # ifndef PACK_2U16
 157 #   define PACK_2U16(a,b)    (((a) << 16) | (b))
 158 # endif
 159 #else
 160 # ifndef PACK_2U8
 161 #   define PACK_2U8(a,b)     (((b) <<  8) | (a))
 162 # endif
 163 # ifndef PACK_4U2
 164 #   define PACK_4U8(a,b,c,d) (((d) << 24) | ((c) << 16) | ((b) << 8) | (a))
 165 # endif
 166 # ifndef PACK_2U16
 167 #   define PACK_2U16(a,b)    (((b) << 16) | (a))
 168 # endif
 169 #endif
 170
 171 #ifndef PACK_2S8
 172 #   define PACK_2S8(a,b)     PACK_2U8((a)&255, (b)&255)
 173 #endif
 174 #ifndef PACK_4S8
 175 #   define PACK_4S8(a,b,c,d) PACK_4U8((a)&255, (b)&255, (c)&255, (d)&255)
 176 #endif
 177 #ifndef PACK_2S16
 178 #   define PACK_2S16(a,b)    PACK_2U16((a)&0xffff, (b)&0xffff)
 179 #endif
 180
 181 #endif /* AVCODEC_MATHOPS_H */
 182