aac5773f
 hucm
功能基本完成，接口待打磨
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/*
* 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 */
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