/*

  * This file is part of FFmpeg.

  *

  * FFmpeg is free software; you can redistribute it and/or modify

  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 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 General Public License for more details.
  *
  * You should have received a copy of the GNU 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.
  */
 
 /**
  * @file
  * progressive to interlaced content filter, inspired by heavy debugging of
  * tinterlace filter.
  */
 
 #ifndef AVFILTER_INTERLACE_H
 #define AVFILTER_INTERLACE_H
 
 #include "libavutil/common.h"
 #include "libavutil/imgutils.h"
 #include "libavutil/opt.h"
 
 #include "avfilter.h"
 #include "formats.h"
 #include "internal.h"
 #include "video.h"
 
 enum ScanMode {
     MODE_TFF = 0,
     MODE_BFF = 1,
 };
 
 enum FieldType {
     FIELD_UPPER = 0,
     FIELD_LOWER = 1,
 };
 
 typedef struct InterlaceContext {
     const AVClass *class;
     enum ScanMode scan;    // top or bottom field first scanning
     int lowpass;           // enable or disable low pass filterning
     AVFrame *cur, *next;   // the two frames from which the new one is obtained
     void (*lowpass_line)(uint8_t *dstp, ptrdiff_t linesize, const uint8_t *srcp,
                          const uint8_t *srcp_above, const uint8_t *srcp_below);
 } InterlaceContext;
 
 void ff_interlace_init_x86(InterlaceContext *interlace);
 
 #endif /* AVFILTER_INTERLACE_H */