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  1. /*
  2.  * This file is part of FFmpeg.
  3.  *
  4.  * FFmpeg is free software; you can redistribute it and/or modify
  5.  * it under the terms of the GNU General Public License as published by
  6.  * the Free Software Foundation; either version 2 of the License, or
  7.  * (at your option) any later version.
  8.  *
  9.  * FFmpeg is distributed in the hope that it will be useful,
  10.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12.  * GNU General Public License for more details.
  13.  *
  14.  * You should have received a copy of the GNU General Public License along
  15.  * with FFmpeg; if not, write to the Free Software Foundation, Inc.,
  16.  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17.  */
  18.  
  19. /**
  20.  * @file
  21.  * progressive to interlaced content filter, inspired by heavy debugging of
  22.  * tinterlace filter.
  23.  */
  24.  
  25. #ifndef AVFILTER_INTERLACE_H
  26. #define AVFILTER_INTERLACE_H
  27.  
  28. #include "libavutil/common.h"
  29. #include "libavutil/imgutils.h"
  30. #include "libavutil/opt.h"
  31.  
  32. #include "avfilter.h"
  33. #include "formats.h"
  34. #include "internal.h"
  35. #include "video.h"
  36.  
  37. enum ScanMode {
  38.     MODE_TFF = 0,
  39.     MODE_BFF = 1,
  40. };
  41.  
  42. enum FieldType {
  43.     FIELD_UPPER = 0,
  44.     FIELD_LOWER = 1,
  45. };
  46.  
  47. typedef struct InterlaceContext {
  48.     const AVClass *class;
  49.     enum ScanMode scan;    // top or bottom field first scanning
  50.     int lowpass;           // enable or disable low pass filterning
  51.     AVFrame *cur, *next;   // the two frames from which the new one is obtained
  52.     void (*lowpass_line)(uint8_t *dstp, ptrdiff_t linesize, const uint8_t *srcp,
  53.                          const uint8_t *srcp_above, const uint8_t *srcp_below);
  54. } InterlaceContext;
  55.  
  56. void ff_interlace_init_x86(InterlaceContext *interlace);
  57.  
  58. #endif /* AVFILTER_INTERLACE_H */
  59.