rnd_avg.h 1.75 KB
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/*
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 * Copyright (c) 2001-2003 BERO <bero@geocities.co.jp>
 * Copyright (c) 2011 Oskar Arvidsson
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 *
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 * This file is part of FFmpeg.
 *
 * 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
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
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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
 * 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
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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
 */

#ifndef AVCODEC_RND_AVG_H
#define AVCODEC_RND_AVG_H

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#include <stddef.h>
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#include <stdint.h>

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#define CALL_2X_PIXELS(a, b, n)\
static void a(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int h){\
    b(block  , pixels  , line_size, h);\
    b(block+n, pixels+n, line_size, h);\
}

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#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 */