/*
  * Copyright (c) 2011 Stefano Sabatini
  * Copyright (c) 2010 Baptiste Coudurier
  * Copyright (c) 2003 Michael Zucchi <notzed@ximian.com>
  *
  * 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
  * temporal field interlace filter, ported from MPlayer/libmpcodecs
  */
 #ifndef AVFILTER_TINTERLACE_H
 #define AVFILTER_TINTERLACE_H
 

 #include "libavutil/bswap.h"

 #include "libavutil/opt.h"

 #include "libavutil/pixdesc.h"

 #include "drawutils.h"

 #include "avfilter.h"
 

 #define TINTERLACE_FLAG_VLPF 01
 #define TINTERLACE_FLAG_EXACT_TB 2
 #define TINTERLACE_FLAG_CVLPF 4
 

 enum TInterlaceMode {
     MODE_MERGE = 0,
     MODE_DROP_EVEN,
     MODE_DROP_ODD,
     MODE_PAD,
     MODE_INTERLEAVE_TOP,
     MODE_INTERLEAVE_BOTTOM,
     MODE_INTERLACEX2,

     MODE_MERGEX2,

     MODE_NB,
 };
 

 typedef struct TInterlaceContext {

     const AVClass *class;

     int mode;                   ///< TInterlaceMode, interlace mode selected

     AVRational preout_time_base;

     int flags;                  ///< flags affecting interlacing algorithm
     int frame;                  ///< number of the output frame
     int vsub;                   ///< chroma vertical subsampling
     AVFrame *cur;
     AVFrame *next;
     uint8_t *black_data[4];     ///< buffer used to fill padded lines
     int black_linesize[4];

     FFDrawContext draw;
     FFDrawColor color;

     const AVPixFmtDescriptor *csp;

     void (*lowpass_line)(uint8_t *dstp, ptrdiff_t width, const uint8_t *srcp,

                          ptrdiff_t mref, ptrdiff_t pref, int clip_max);

 } TInterlaceContext;
 

 void ff_tinterlace_init_x86(TInterlaceContext *interlace);
 

 #endif /* AVFILTER_TINTERLACE_H */