/*
  * 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
  */
 
 #ifndef AVFILTER_INTERNAL_H
 #define AVFILTER_INTERNAL_H
 
 /**
  * @file
  * internal API functions
  */
 
 #include "avfilter.h"

 #include "avfiltergraph.h"

 #define POOL_SIZE 32
 typedef struct AVFilterPool {
     AVFilterBufferRef *pic[POOL_SIZE];
     int count;

 } AVFilterPool;

 /**
  * Check for the validity of graph.
  *
  * A graph is considered valid if all its input and output pads are
  * connected.
  *
  * @return 0 in case of success, a negative value otherwise
  */
 int ff_avfilter_graph_check_validity(AVFilterGraph *graphctx, AVClass *log_ctx);
 
 /**
  * Configure all the links of graphctx.
  *
  * @return 0 in case of success, a negative value otherwise
  */
 int ff_avfilter_graph_config_links(AVFilterGraph *graphctx, AVClass *log_ctx);
 
 /**
  * Configure the formats of all the links in the graph.
  */
 int ff_avfilter_graph_config_formats(AVFilterGraph *graphctx, AVClass *log_ctx);
 

 /** default handler for freeing audio/video buffer when there are no references left */
 void ff_avfilter_default_free_buffer(AVFilterBuffer *buf);
 

 #endif /* AVFILTER_INTERNAL_H */