libavfilter/avfiltergraph.h

   1 /*
   2  * Filter graphs
   3  * copyright (c) 2007 Bobby Bingham
   4  *
   5  * This file is part of FFmpeg.
   6  *
   7  * FFmpeg is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * FFmpeg is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with FFmpeg; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #ifndef FFMPEG_AVFILTERGRAPH_H
  23 #define FFMPEG_AVFILTERGRAPH_H
  24
  25 #include "avfilter.h"
  26
  27 typedef struct AVFilterGraph {
  28     unsigned filter_count;
  29     AVFilterContext **filters;
  30 } AVFilterGraph;
  31
  32 /**
  33  * Get a pointer to a graph by instance name
  34  */
  35 AVFilterContext *avfilter_graph_get_filter(AVFilterGraph *graph, char *name);
  36
  37 /**
  38  * Add an existing filter instance to a filter graph.
  39  * @param graph  The filter graph
  40  * @param filter The filter to be added
  41  */
  42 int avfilter_graph_add_filter(AVFilterGraph *graphctx, AVFilterContext *filter);
  43
  44 /**
  45  * Configure the formats of all the links in the graph.
  46  */
  47 int avfilter_graph_config_formats(AVFilterGraph *graphctx);
  48
  49 /**
  50  * Free a graph and destroy its links.
  51  */
  52 void avfilter_destroy_graph(AVFilterGraph *graph);
  53
  54 #endif  /* FFMPEG_AVFILTERGRAPH_H */