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51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
/*
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* Copyright (c) 2001-2003 BERO <bero@geocities.co.jp>
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* Copyright (c) 2011 Oskar Arvidsson
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_RND_AVG_H
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#define AVCODEC_RND_AVG_H
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#include <stddef.h>
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#include <stdint.h>
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#define BYTE_VEC32(c) ((c) * 0x01010101UL)
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#define BYTE_VEC64(c) ((c) * 0x0001000100010001UL)
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static inline uint32_t rnd_avg32(uint32_t a, uint32_t b)
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{
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return (a | b) - (((a ^ b) & ~BYTE_VEC32(0x01)) >> 1);
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}
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static inline uint32_t no_rnd_avg32(uint32_t a, uint32_t b)
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{
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return (a & b) + (((a ^ b) & ~BYTE_VEC32(0x01)) >> 1);
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}
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static inline uint64_t rnd_avg64(uint64_t a, uint64_t b)
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{
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return (a | b) - (((a ^ b) & ~BYTE_VEC64(0x01)) >> 1);
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}
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static inline uint64_t no_rnd_avg64(uint64_t a, uint64_t b)
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{
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return (a & b) + (((a ^ b) & ~BYTE_VEC64(0x01)) >> 1);
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}
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#endif /* AVCODEC_RND_AVG_H */
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