2 * Copyright (c) 2001-2003 BERO <bero@geocities.co.jp>
3 * Copyright (c) 2011 Oskar Arvidsson
5 * This file is part of FFmpeg.
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.
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.
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
22 #ifndef AVCODEC_RND_AVG_H
23 #define AVCODEC_RND_AVG_H
28 #define CALL_2X_PIXELS(a, b, n)\
29 static void a(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int h){\
30 b(block , pixels , line_size, h);\
31 b(block+n, pixels+n, line_size, h);\
34 #define BYTE_VEC32(c) ((c)*0x01010101UL)
35 #define BYTE_VEC64(c) ((c)*0x0001000100010001UL)
37 static inline uint32_t rnd_avg32(uint32_t a, uint32_t b)
39 return (a | b) - (((a ^ b) & ~BYTE_VEC32(0x01)) >> 1);
42 static inline uint32_t no_rnd_avg32(uint32_t a, uint32_t b)
44 return (a & b) + (((a ^ b) & ~BYTE_VEC32(0x01)) >> 1);
47 static inline uint64_t rnd_avg64(uint64_t a, uint64_t b)
49 return (a | b) - (((a ^ b) & ~BYTE_VEC64(0x01)) >> 1);
52 static inline uint64_t no_rnd_avg64(uint64_t a, uint64_t b)
54 return (a & b) + (((a ^ b) & ~BYTE_VEC64(0x01)) >> 1);
57 #endif /* AVCODEC_RND_AVG_H */