/*
  * 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_IDET_H
 #define AVFILTER_IDET_H
 
 #include "libavutil/pixdesc.h"
 #include "avfilter.h"
 
 #define HIST_SIZE 4
 

 typedef int (*ff_idet_filter_func)(const uint8_t *a, const uint8_t *b, const uint8_t *c, int w);
 

 typedef enum {
     TFF,
     BFF,

     PROGRESSIVE,

     UNDETERMINED,
 } Type;
 

 typedef enum {
     REPEAT_NONE,
     REPEAT_TOP,
     REPEAT_BOTTOM,
 } RepeatedField;
 

 typedef struct IDETContext {

     const AVClass *class;
     float interlace_threshold;
     float progressive_threshold;

     float repeat_threshold;

     float half_life;
     uint64_t decay_coefficient;

 
     Type last_type;

 
     uint64_t repeats[3];

     uint64_t prestat[4];
     uint64_t poststat[4];

     uint64_t total_repeats[3];

     uint64_t total_prestat[4];
     uint64_t total_poststat[4];

 
     uint8_t history[HIST_SIZE];
 
     AVFrame *cur;
     AVFrame *next;
     AVFrame *prev;

     ff_idet_filter_func filter_line;

     int interlaced_flag_accuracy;
     int analyze_interlaced_flag;
     int analyze_interlaced_flag_done;
 

     const AVPixFmtDescriptor *csp;

     int eof;

 } IDETContext;
 

 void ff_idet_init_x86(IDETContext *idet, int for_16b);

 
 /* main fall-back for left-over */
 int ff_idet_filter_line_c(const uint8_t *a, const uint8_t *b, const uint8_t *c, int w);

 int ff_idet_filter_line_c_16bit(const uint16_t *a, const uint16_t *b, const uint16_t *c, int w);

 
 #endif