/*
  * Copyright (c) 2010 Nolan Lum <nol888@gmail.com>
  * Copyright (c) 2009 Loren Merritt <lorenm@u.washignton.edu>
  *
  * 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_GRADFUN_H
 #define AVFILTER_GRADFUN_H
 
 #include "avfilter.h"
 
 /// Holds instance-specific information for gradfun.

 typedef struct GradFunContext {

     const AVClass *class;
     double strength;    ///< user specified strength, used to define thresh

     int thresh;    ///< threshold for gradient algorithm
     int radius;    ///< blur radius
     int chroma_w;  ///< width of the chroma planes
     int chroma_h;  ///< weight of the chroma planes
     int chroma_r;  ///< blur radius for the chroma planes
     uint16_t *buf; ///< holds image data for blur algorithm passed into filter.
     /// DSP functions.

     void (*filter_line) (uint8_t *dst, const uint8_t *src, const uint16_t *dc, int width, int thresh, const uint16_t *dithers);
     void (*blur_line) (uint16_t *dc, uint16_t *buf, const uint16_t *buf1, const uint8_t *src, int src_linesize, int width);

 } GradFunContext;
 

 void ff_gradfun_init_x86(GradFunContext *gf);
 

 void ff_gradfun_filter_line_c(uint8_t *dst, const uint8_t *src, const uint16_t *dc, int width, int thresh, const uint16_t *dithers);
 void ff_gradfun_blur_line_c(uint16_t *dc, uint16_t *buf, const uint16_t *buf1, const uint8_t *src, int src_linesize, int width);

 
 #endif /* AVFILTER_GRADFUN_H */