2 * This file is part of Libav.
4 * Libav is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
9 * Libav is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with Libav; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 #ifndef AVCODEC_RND_AVG_H
20 #define AVCODEC_RND_AVG_H
25 #define CALL_2X_PIXELS(a, b, n)\
26 static void a(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int h){\
27 b(block , pixels , line_size, h);\
28 b(block+n, pixels+n, line_size, h);\
31 #define BYTE_VEC32(c) ((c)*0x01010101UL)
32 #define BYTE_VEC64(c) ((c)*0x0001000100010001UL)
34 static inline uint32_t rnd_avg32(uint32_t a, uint32_t b)
36 return (a | b) - (((a ^ b) & ~BYTE_VEC32(0x01)) >> 1);
39 static inline uint32_t no_rnd_avg32(uint32_t a, uint32_t b)
41 return (a & b) + (((a ^ b) & ~BYTE_VEC32(0x01)) >> 1);
44 static inline uint64_t rnd_avg64(uint64_t a, uint64_t b)
46 return (a | b) - (((a ^ b) & ~BYTE_VEC64(0x01)) >> 1);
49 static inline uint64_t no_rnd_avg64(uint64_t a, uint64_t b)
51 return (a & b) + (((a ^ b) & ~BYTE_VEC64(0x01)) >> 1);
54 #endif /* AVCODEC_RND_AVG_H */