/*
  * 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 */