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Diffstat (limited to 'libs/ffvpx/libavcodec/mathops.h')
| -rw-r--r-- | libs/ffvpx/libavcodec/mathops.h | 251 |
1 files changed, 251 insertions, 0 deletions
diff --git a/libs/ffvpx/libavcodec/mathops.h b/libs/ffvpx/libavcodec/mathops.h new file mode 100644 index 000000000..1c3566431 --- /dev/null +++ b/libs/ffvpx/libavcodec/mathops.h @@ -0,0 +1,251 @@ +/* + * 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 <stdint.h> + +#include "libavutil/common.h" +#include "libavutil/reverse.h" +#include "config.h" + +#define MAX_NEG_CROP 1024 + +extern const uint32_t ff_inverse[257]; +extern const uint8_t ff_sqrt_tab[256]; +extern const uint8_t ff_crop_tab[256 + 2 * MAX_NEG_CROP]; +extern const uint8_t ff_zigzag_direct[64]; +extern const uint8_t ff_zigzag_scan[16+1]; + +#if ARCH_ARM +# include "arm/mathops.h" +#elif ARCH_AVR32 +# include "avr32/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 MUL64 +# define MUL64(a,b) ((int64_t)(a) * (int64_t)(b)) +#endif + +#ifndef MULL +# define MULL(a,b,s) (MUL64(a, b) >> (s)) +#endif + +#ifndef MULH +static av_always_inline int MULH(int a, int b){ + return MUL64(a, 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 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(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 + +#ifndef median4 +#define median4 median4 +static inline av_const int median4(int a, int b, int c, int d) +{ + if (a < b) { + if (c < d) return (FFMIN(b, d) + FFMAX(a, c)) / 2; + else return (FFMIN(b, c) + FFMAX(a, d)) / 2; + } else { + if (c < d) return (FFMIN(a, d) + FFMAX(b, c)) / 2; + else return (FFMIN(a, c) + FFMAX(b, d)) / 2; + } +} +#endif + +#ifndef sign_extend +static inline av_const int sign_extend(int val, unsigned bits) +{ + unsigned shift = 8 * sizeof(int) - bits; + union { unsigned u; int s; } v = { (unsigned) val << shift }; + return v.s >> shift; +} +#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 MASK_ABS +#define MASK_ABS(mask, level) do { \ + mask = level >> 31; \ + level = (level ^ mask) - mask; \ + } while (0) +#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 + +#ifndef FASTDIV +# define FASTDIV(a,b) ((uint32_t)((((uint64_t)a) * ff_inverse[b]) >> 32)) +#endif /* FASTDIV */ + +#ifndef ff_sqrt +#define ff_sqrt ff_sqrt +static inline av_const unsigned int ff_sqrt(unsigned int a) +{ + unsigned int b; + + if (a < 255) return (ff_sqrt_tab[a + 1] - 1) >> 4; + else if (a < (1 << 12)) b = ff_sqrt_tab[a >> 4] >> 2; +#if !CONFIG_SMALL + else if (a < (1 << 14)) b = ff_sqrt_tab[a >> 6] >> 1; + else if (a < (1 << 16)) b = ff_sqrt_tab[a >> 8] ; +#endif + else { + int s = av_log2_16bit(a >> 16) >> 1; + unsigned int c = a >> (s + 2); + b = ff_sqrt_tab[c >> (s + 8)]; + b = FASTDIV(c,b) + (b << s); + } + + return b - (a < b * b); +} +#endif + +static inline av_const float ff_sqrf(float a) +{ + return a*a; +} + +static inline int8_t ff_u8_to_s8(uint8_t a) +{ + union { + uint8_t u8; + int8_t s8; + } b; + b.u8 = a; + return b.s8; +} + +static av_always_inline uint32_t bitswap_32(uint32_t x) +{ + return (uint32_t)ff_reverse[ x & 0xFF] << 24 | + (uint32_t)ff_reverse[(x >> 8) & 0xFF] << 16 | + (uint32_t)ff_reverse[(x >> 16) & 0xFF] << 8 | + (uint32_t)ff_reverse[ x >> 24]; +} + +#endif /* AVCODEC_MATHOPS_H */ |