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  1. /*
  2.  * This file is part of FFmpeg.
  3.  *
  4.  * FFmpeg is free software; you can redistribute it and/or
  5.  * modify it under the terms of the GNU Lesser General Public
  6.  * License as published by the Free Software Foundation; either
  7.  * version 2.1 of the License, or (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 GNU
  12.  * Lesser General Public License for more details.
  13.  *
  14.  * You should have received a copy of the GNU Lesser General Public
  15.  * License along with FFmpeg; if not, write to the Free Software
  16.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17.  */
  18.  
  19. /**
  20.  * @file
  21.  * Double input streams helper for filters
  22.  */
  23.  
  24. #ifndef AVFILTER_DUALINPUT_H
  25. #define AVFILTER_DUALINPUT_H
  26.  
  27. #include <stdint.h>
  28. #include "bufferqueue.h"
  29. #include "framesync.h"
  30. #include "internal.h"
  31.  
  32. typedef struct {
  33.     FFFrameSync fs;
  34.     FFFrameSyncIn second_input; /* must be immediately after fs */
  35.  
  36.     AVFrame *(*process)(AVFilterContext *ctx, AVFrame *main, const AVFrame *second);
  37.     int shortest;               ///< terminate stream when the second input terminates
  38.     int repeatlast;             ///< repeat last second frame
  39. } FFDualInputContext;
  40.  
  41. int ff_dualinput_init(AVFilterContext *ctx, FFDualInputContext *s);
  42. int ff_dualinput_filter_frame(FFDualInputContext *s, AVFilterLink *inlink, AVFrame *in);
  43. int ff_dualinput_request_frame(FFDualInputContext *s, AVFilterLink *outlink);
  44. void ff_dualinput_uninit(FFDualInputContext *s);
  45.  
  46. #endif /* AVFILTER_DUALINPUT_H */
  47.