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;
31 char *scale_sws_opts; ///< sws options to use for the auto-inserted scale filters
35 * Allocate a filter graph.
37 AVFilterGraph *avfilter_graph_alloc(void);
40 * Get a filter instance with name name from graph.
42 * @return the pointer to the found filter instance or NULL if it
45 AVFilterContext *avfilter_graph_get_filter(AVFilterGraph *graph, char *name);
48 * Add an existing filter instance to a filter graph.
50 * @param graphctx the filter graph
51 * @param filter the filter to be added
53 int avfilter_graph_add_filter(AVFilterGraph *graphctx, AVFilterContext *filter);
56 * Check for the validity of graph.
58 * A graph is considered valid if all its input and output pads are
61 * @return 0 in case of success, a negative value otherwise
63 int avfilter_graph_check_validity(AVFilterGraph *graphctx, AVClass *log_ctx);
66 * Configure all the links of graphctx.
68 * @return 0 in case of success, a negative value otherwise
70 int avfilter_graph_config_links(AVFilterGraph *graphctx, AVClass *log_ctx);
73 * Configure the formats of all the links in the graph.
75 int avfilter_graph_config_formats(AVFilterGraph *graphctx, AVClass *log_ctx);
78 * Check validity and configure all the links and formats in the graph.
80 * @see avfilter_graph_check_validity(), avfilter_graph_config_links(),
81 * avfilter_graph_config_formats()
83 int avfilter_graph_config(AVFilterGraph *graphctx, AVClass *log_ctx);
86 * Free a graph and destroy its links.
88 void avfilter_graph_destroy(AVFilterGraph *graph);
90 #endif /* AVFILTER_AVFILTERGRAPH_H */