libavfilter/graphparser.h

   1 /*
   2  * Filter graph parser
   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 AVFILTER_GRAPHPARSER_H
  23 #define AVFILTER_GRAPHPARSER_H
  24
  25 #include "avfilter.h"
  26 #include "avfiltergraph.h"
  27
  28 /**
  29  * A linked-list of the inputs/outputs of the filter chain.
  30  */
  31 typedef struct AVFilterInOut {
  32     const char *name;
  33     AVFilterContext *filter;
  34     int pad_idx;
  35
  36     struct AVFilterInOut *next;
  37 } AVFilterInOut;
  38
  39 /**
  40  * Add to a graph a graph described by a string.
  41  *
  42  * @param graph   the filter graph where to link the parsed graph context
  43  * @param filters string to be parsed
  44  * @param inputs  linked list to the inputs of the graph
  45  * @param outputs linked list to the outputs of the graph
  46  * @return        zero on success, -1 on error
  47  */
  48 int avfilter_graph_parse(AVFilterGraph *graph, const char *filters,
  49                          AVFilterInOut *inputs, AVFilterInOut *outputs,
  50                          AVClass *log_ctx);
  51
  52 #endif  /* AVFILTER_GRAPHPARSER_H */