FFmpeg
pixelutils.h
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1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg 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  * FFmpeg 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 FFmpeg; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 #ifndef AVUTIL_PIXELUTILS_H
20 #define AVUTIL_PIXELUTILS_H
21 
22 #include <stddef.h>
23 #include <stdint.h>
24 #include "common.h"
25 
26 /**
27  * Sum of abs(src1[x] - src2[x])
28  */
29 typedef int (*av_pixelutils_sad_fn)(const uint8_t *src1, ptrdiff_t stride1,
30  const uint8_t *src2, ptrdiff_t stride2);
31 
32 /**
33  * Get a potentially optimized pointer to a Sum-of-absolute-differences
34  * function (see the av_pixelutils_sad_fn prototype).
35  *
36  * @param w_bits 1<<w_bits is the requested width of the block size
37  * @param h_bits 1<<h_bits is the requested height of the block size
38  * @param aligned If set to 2, the returned sad function will assume src1 and
39  * src2 addresses are aligned on the block size.
40  * If set to 1, the returned sad function will assume src1 is
41  * aligned on the block size.
42  * If set to 0, the returned sad function assume no particular
43  * alignment.
44  * @param log_ctx context used for logging, can be NULL
45  *
46  * @return a pointer to the SAD function or NULL in case of error (because of
47  * invalid parameters)
48  */
49 av_pixelutils_sad_fn av_pixelutils_get_sad_fn(int w_bits, int h_bits,
50  int aligned, void *log_ctx);
51 
52 #endif /* AVUTIL_PIXELUTILS_H */
uint8_t
av_pixelutils_sad_fn av_pixelutils_get_sad_fn(int w_bits, int h_bits, int aligned, void *log_ctx)
Get a potentially optimized pointer to a Sum-of-absolute-differences function (see the av_pixelutils_...
Definition: pixelutils.c:66
static int aligned(int val)
Definition: dashdec.c:178
int(* av_pixelutils_sad_fn)(const uint8_t *src1, ptrdiff_t stride1, const uint8_t *src2, ptrdiff_t stride2)
Sum of abs(src1[x] - src2[x])
Definition: pixelutils.h:29
#define src1
Definition: h264pred.c:139
int
common internal and external API header