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/*
* Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>
* Copyright (c) 2013 Paul B Mahol
*
* 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
*/
#ifndef AVFILTER_NOISE_H
#define AVFILTER_NOISE_H
#include "libavutil/lfg.h"
#include "avfilter.h"
#define MAX_NOISE 5120
#define MAX_SHIFT 1024
#define MAX_RES (MAX_NOISE-MAX_SHIFT)
#define NOISE_UNIFORM 1
#define NOISE_TEMPORAL 2
#define NOISE_AVERAGED 8
#define NOISE_PATTERN 16
typedef struct FilterParams {
int strength;
unsigned flags;
AVLFG lfg;
int seed;
int8_t *noise;
int8_t *prev_shift[MAX_RES][3];
int rand_shift[MAX_RES];
int rand_shift_init;
} FilterParams;
typedef struct NoiseContext {
const AVClass *class;
int nb_planes;
int bytewidth[4];
int height[4];
FilterParams all;
FilterParams param[4];
void (*line_noise)(uint8_t *dst, const uint8_t *src, const int8_t *noise, int len, int shift);
void (*line_noise_avg)(uint8_t *dst, const uint8_t *src, int len, const int8_t * const *shift);
} NoiseContext;
void ff_line_noise_c(uint8_t *dst, const uint8_t *src, const int8_t *noise, int len, int shift);
void ff_line_noise_avg_c(uint8_t *dst, const uint8_t *src, int len, const int8_t * const *shift);
void ff_noise_init_x86(NoiseContext *n);
#endif /* AVFILTER_NOISE_H */
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