/*
  * 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
  */
 
 /**
  * @file
  * Double input streams helper for filters
  */
 
 #ifndef AVFILTER_DUALINPUT_H
 #define AVFILTER_DUALINPUT_H
 
 #include <stdint.h>
 #include "bufferqueue.h"

 #include "framesync.h"

 #include "internal.h"
 
 typedef struct {

     FFFrameSync fs;
     FFFrameSyncIn second_input; /* must be immediately after fs */
 

     AVFrame *(*process)(AVFilterContext *ctx, AVFrame *main, const AVFrame *second);
     int shortest;               ///< terminate stream when the second input terminates
     int repeatlast;             ///< repeat last second frame
 } FFDualInputContext;
 

 int ff_dualinput_init(AVFilterContext *ctx, FFDualInputContext *s);

 int ff_dualinput_filter_frame(FFDualInputContext *s, AVFilterLink *inlink, AVFrame *in);

 int ff_dualinput_request_frame(FFDualInputContext *s, AVFilterLink *outlink);
 void ff_dualinput_uninit(FFDualInputContext *s);
 
 #endif /* AVFILTER_DUALINPUT_H */