| /* |
| * Copyright (c) 2001-2003 BERO <bero@geocities.co.jp> |
| * Copyright (c) 2011 Oskar Arvidsson |
| * |
| * 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_RND_AVG_H |
| #define AVCODEC_RND_AVG_H |
| |
| #include <stddef.h> |
| #include <stdint.h> |
| |
| #define BYTE_VEC32(c) ((c) * 0x01010101UL) |
| #define BYTE_VEC64(c) ((c) * 0x0001000100010001UL) |
| |
| static inline uint32_t rnd_avg32(uint32_t a, uint32_t b) |
| { |
| return (a | b) - (((a ^ b) & ~BYTE_VEC32(0x01)) >> 1); |
| } |
| |
| static inline uint32_t no_rnd_avg32(uint32_t a, uint32_t b) |
| { |
| return (a & b) + (((a ^ b) & ~BYTE_VEC32(0x01)) >> 1); |
| } |
| |
| static inline uint64_t rnd_avg64(uint64_t a, uint64_t b) |
| { |
| return (a | b) - (((a ^ b) & ~BYTE_VEC64(0x01)) >> 1); |
| } |
| |
| static inline uint64_t no_rnd_avg64(uint64_t a, uint64_t b) |
| { |
| return (a & b) + (((a ^ b) & ~BYTE_VEC64(0x01)) >> 1); |
| } |
| |
| #endif /* AVCODEC_RND_AVG_H */ |
