repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
1 | /* |
| 2 | * Copyright (c) 2001-2003 BERO <bero@geocities.co.jp> | |
| 3 | * Copyright (c) 2011 Oskar Arvidsson | |
| 4 | * | |
| 5 | * This file is part of FFmpeg. | |
| 6 | * | |
| 7 | * FFmpeg is free software; you can redistribute it and/or | |
| 8 | * modify it under the terms of the GNU Lesser General Public | |
| 9 | * License as published by the Free Software Foundation; either | |
| 10 | * version 2.1 of the License, or (at your option) any later version. | |
| 11 | * | |
| 12 | * FFmpeg is distributed in the hope that it will be useful, | |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 15 | * Lesser General Public License for more details. | |
| 16 | * | |
| 17 | * You should have received a copy of the GNU Lesser General Public | |
| 18 | * License along with FFmpeg; if not, write to the Free Software | |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 20 | */ | |
| 21 | ||
| 22 | #ifndef AVCODEC_RND_AVG_H | |
| 23 | #define AVCODEC_RND_AVG_H | |
| 24 | ||
| 25 | #include <stddef.h> | |
| 26 | #include <stdint.h> | |
| 27 | ||
| 28 | #define BYTE_VEC32(c) ((c) * 0x01010101UL) | |
| 29 | #define BYTE_VEC64(c) ((c) * 0x0001000100010001UL) | |
| 30 | ||
| 31 | static inline uint32_t rnd_avg32(uint32_t a, uint32_t b) | |
| 32 | { | |
| 33 | return (a | b) - (((a ^ b) & ~BYTE_VEC32(0x01)) >> 1); | |
| 34 | } | |
| 35 | ||
| 36 | static inline uint32_t no_rnd_avg32(uint32_t a, uint32_t b) | |
| 37 | { | |
| 38 | return (a & b) + (((a ^ b) & ~BYTE_VEC32(0x01)) >> 1); | |
| 39 | } | |
| 40 | ||
| 41 | static inline uint64_t rnd_avg64(uint64_t a, uint64_t b) | |
| 42 | { | |
| 43 | return (a | b) - (((a ^ b) & ~BYTE_VEC64(0x01)) >> 1); | |
| 44 | } | |
| 45 | ||
| 46 | static inline uint64_t no_rnd_avg64(uint64_t a, uint64_t b) | |
| 47 | { | |
| 48 | return (a & b) + (((a ^ b) & ~BYTE_VEC64(0x01)) >> 1); | |
| 49 | } | |
| 50 | ||
| 51 | #endif /* AVCODEC_RND_AVG_H */ |