ffmpeg.libavutil.pixelutils source code

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 module ffmpeg.libavutil.pixelutils;
20 
21 extern (C):
22 import ffmpeg; @nogc nothrow:
23 
24 /**
25  * Sum of abs(src1[x] - src2[x])
26  */
27 alias av_pixelutils_sad_fn = int function (
28     const(ubyte)* src1,
29     ptrdiff_t stride1,
30     const(ubyte)* src2,
31     ptrdiff_t stride2);
32 
33 /**
34  * Get a potentially optimized pointer to a Sum-of-absolute-differences
35  * function (see the av_pixelutils_sad_fn prototype).
36  *
37  * @param w_bits  1<<w_bits is the requested width of the block size
38  * @param h_bits  1<<h_bits is the requested height of the block size
39  * @param aligned If set to 2, the returned sad function will assume src1 and
40  *                src2 addresses are aligned on the block size.
41  *                If set to 1, the returned sad function will assume src1 is
42  *                aligned on the block size.
43  *                If set to 0, the returned sad function assume no particular
44  *                alignment.
45  * @param log_ctx context used for logging, can be NULL
46  *
47  * @return a pointer to the SAD function or NULL in case of error (because of
48  *         invalid parameters)
49  */
50 av_pixelutils_sad_fn av_pixelutils_get_sad_fn (
51     int w_bits,
52     int h_bits,
53     int aligned,
54     void* log_ctx);
55 
56 /* AVUTIL_PIXELUTILS_H */