Libav
rnd_avg.h
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1 /*
2  * This file is part of Libav.
3  *
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.
8  *
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.
13  *
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
17  */
18 
19 #ifndef AVCODEC_RND_AVG_H
20 #define AVCODEC_RND_AVG_H
21 
22 #include <stddef.h>
23 #include <stdint.h>
24 
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);\
29 }
30 
31 #define BYTE_VEC32(c) ((c)*0x01010101UL)
32 #define BYTE_VEC64(c) ((c)*0x0001000100010001UL)
33 
34 static inline uint32_t rnd_avg32(uint32_t a, uint32_t b)
35 {
36  return (a | b) - (((a ^ b) & ~BYTE_VEC32(0x01)) >> 1);
37 }
38 
39 static inline uint32_t no_rnd_avg32(uint32_t a, uint32_t b)
40 {
41  return (a & b) + (((a ^ b) & ~BYTE_VEC32(0x01)) >> 1);
42 }
43 
44 static inline uint64_t rnd_avg64(uint64_t a, uint64_t b)
45 {
46  return (a | b) - (((a ^ b) & ~BYTE_VEC64(0x01)) >> 1);
47 }
48 
49 static inline uint64_t no_rnd_avg64(uint64_t a, uint64_t b)
50 {
51  return (a & b) + (((a ^ b) & ~BYTE_VEC64(0x01)) >> 1);
52 }
53 
54 #endif /* AVCODEC_RND_AVG_H */
static uint64_t no_rnd_avg64(uint64_t a, uint64_t b)
Definition: rnd_avg.h:49
#define b
Definition: input.c:52
static uint32_t no_rnd_avg32(uint32_t a, uint32_t b)
Definition: rnd_avg.h:39
#define BYTE_VEC32(c)
Definition: rnd_avg.h:31
static uint32_t rnd_avg32(uint32_t a, uint32_t b)
Definition: rnd_avg.h:34
#define BYTE_VEC64(c)
Definition: rnd_avg.h:32
static uint64_t rnd_avg64(uint64_t a, uint64_t b)
Definition: rnd_avg.h:44