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 * Gets a filter instance with name name from graph.
37 * @return the pointer to the found filter instance or NULL if it
40 AVFilterContext
*avfilter_graph_get_filter(AVFilterGraph
*graph
, char *name
);
43 * Adds an existing filter instance to a filter graph.
44 * @param graph The filter graph
45 * @param filter The filter to be added
47 int avfilter_graph_add_filter(AVFilterGraph
*graphctx
, AVFilterContext
*filter
);
50 * Checks for the validity of graph.
52 * A graph is considered valid if all its input and output pads are
55 * @return 0 in case of success, a negative value otherwise
57 int avfilter_graph_check_validity(AVFilterGraph
*graphctx
, AVClass
*log_ctx
);
60 * Configures all the links of graphctx.
62 * @return 0 in case of success, a negative value otherwise
64 int avfilter_graph_config_links(AVFilterGraph
*graphctx
, AVClass
*log_ctx
);
67 * Configures the formats of all the links in the graph.
69 int avfilter_graph_config_formats(AVFilterGraph
*graphctx
);
72 * Frees a graph and destroys its links.
74 void avfilter_graph_destroy(AVFilterGraph
*graph
);
76 #endif /* AVFILTER_AVFILTERGRAPH_H */