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/*
* 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 */
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