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 
25 /**
26  * Sum of abs(src1[x] - src2[x])
27  */
28 typedef int (*av_pixelutils_sad_fn)(const uint8_t *src1, ptrdiff_t stride1,
29  const uint8_t *src2, ptrdiff_t stride2);
30 
31 /**
32  * Get a potentially optimized pointer to a Sum-of-absolute-differences
33  * function (see the av_pixelutils_sad_fn prototype).
34  *
35  * @param w_bits 1<<w_bits is the requested width of the block size
36  * @param h_bits 1<<h_bits is the requested height of the block size
37  * @param aligned If set to 2, the returned sad function will assume src1 and
38  * src2 addresses are aligned on the block size.
39  * If set to 1, the returned sad function will assume src1 is
40  * aligned on the block size.
41  * If set to 0, the returned sad function assume no particular
42  * alignment.
43  * @param log_ctx context used for logging, can be NULL
44  *
45  * @return a pointer to the SAD function or NULL in case of error (because of
46  * invalid parameters)
47  */
48 av_pixelutils_sad_fn av_pixelutils_get_sad_fn(int w_bits, int h_bits,
49  int aligned, void *log_ctx);
50 
51 #endif /* AVUTIL_PIXELUTILS_H */
src1
const pixel * src1
Definition: h264pred_template.c:421
av_pixelutils_sad_fn
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:28
aligned
static int aligned(int val)
Definition: dashdec.c:170
av_pixelutils_get_sad_fn
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:72
src2
const pixel * src2
Definition: h264pred_template.c:422
int
int
Definition: ffmpeg_filter.c:424