3 * copyright (c) 2007 Bobby Bingham
5 * This file is part of FFmpeg.
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.
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.
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
22 #ifndef AVFILTER_AVFILTERGRAPH_H
23 #define AVFILTER_AVFILTERGRAPH_H
27 typedef struct AVFilterGraph {
28 unsigned filter_count;
29 AVFilterContext **filters;
33 * Get from \p graph a filter instance with name \p name.
35 * @return the pointer to the found filter instance or NULL if it
38 AVFilterContext *avfilter_graph_get_filter(AVFilterGraph *graph, char *name);
41 * Add an existing filter instance to a filter graph.
42 * @param graph The filter graph
43 * @param filter The filter to be added
45 int avfilter_graph_add_filter(AVFilterGraph *graphctx, AVFilterContext *filter);
48 * Check for the validity of \p graph.
50 * A graph is considered valid if all its input and output pads are
53 * @return 0 in case of success, a negative value otherwise
55 int avfilter_graph_check_validity(AVFilterGraph *graphctx, AVClass *log_ctx);
58 * Configure the formats of all the links in the graph.
60 int avfilter_graph_config_formats(AVFilterGraph *graphctx);
63 * Free a graph and destroy its links.
65 void avfilter_destroy_graph(AVFilterGraph *graph);
67 #endif /* AVFILTER_AVFILTERGRAPH_H */