blob: 807b3a016ad3280d13799f329e54e4286184e77c (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
/*
* H.274 film grain synthesis
* Copyright (c) 2021 Niklas Haas <ffmpeg@haasn.xyz>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* H.274 film grain synthesis.
* @author Niklas Haas <ffmpeg@haasn.xyz>
*/
#ifndef AVCODEC_H274_H
#define AVCODEC_H274_H
#include <libavutil/film_grain_params.h>
// Must be initialized to {0} prior to first usage
typedef struct H274FilmGrainDatabase {
// Database of film grain patterns, lazily computed as-needed
int8_t db[13 /* h */][13 /* v */][64][64];
uint16_t residency[13 /* h */]; // bit field of v
// Temporary buffer for slice generation
int16_t slice_tmp[64][64];
} H274FilmGrainDatabase;
// Synthesizes film grain on top of `in` and stores the result to `out`. `out`
// must already have been allocated and set to the same size and format as
// `in`.
//
// Returns a negative error code on error, such as invalid params.
int ff_h274_apply_film_grain(AVFrame *out, const AVFrame *in,
H274FilmGrainDatabase *db,
const AVFilmGrainParams *params);
#endif /* AVCODEC_H274_H */
|
