mirror of https://git.ffmpeg.org/ffmpeg.git
53 lines
1.8 KiB
C
53 lines
1.8 KiB
C
|
/*
|
||
|
|
* 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 */
|