libavfilter/gradfun.h

   1 /*
   2  * Copyright (c) 2010 Nolan Lum <nol888@gmail.com>
   3  * Copyright (c) 2009 Loren Merritt <lorenm@u.washignton.edu>
   4  *
   5  * This file is part of Libav.
   6  *
   7  * Libav is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * Libav is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with Libav; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #ifndef AVFILTER_GRADFUN_H
  23 #define AVFILTER_GRADFUN_H
  24
  25 #include "avfilter.h"
  26
  27 /// Holds instance-specific information for gradfun.
  28 typedef struct GradFunContext {
  29     int thresh;    ///< threshold for gradient algorithm
  30     int radius;    ///< blur radius
  31     int chroma_w;  ///< width of the chroma planes
  32     int chroma_h;  ///< weight of the chroma planes
  33     int chroma_r;  ///< blur radius for the chroma planes
  34     uint16_t *buf; ///< holds image data for blur algorithm passed into filter.
  35     /// DSP functions.
  36     void (*filter_line) (uint8_t *dst, uint8_t *src, uint16_t *dc, int width, int thresh, const uint16_t *dithers);
  37     void (*blur_line) (uint16_t *dc, uint16_t *buf, uint16_t *buf1, uint8_t *src, int src_linesize, int width);
  38 } GradFunContext;
  39
  40 void ff_gradfun_init_x86(GradFunContext *gf);
  41
  42 void ff_gradfun_filter_line_c(uint8_t *dst, uint8_t *src, uint16_t *dc, int width, int thresh, const uint16_t *dithers);
  43 void ff_gradfun_blur_line_c(uint16_t *dc, uint16_t *buf, uint16_t *buf1, uint8_t *src, int src_linesize, int width);
  44
  45 #endif /* AVFILTER_GRADFUN_H */