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 FFMPEG_AVFILTERGRAPH_H
23 #define FFMPEG_AVFILTERGRAPH_H
27 /** Linked-list of filters to create for an AVFilterGraphDesc */
28 typedef struct AVFilterGraphDescFilter
30 int index; ///< filter instance index
31 char *filter; ///< name of filter type
32 char *args; ///< filter parameters
33 struct AVFilterGraphDescFilter *next;
34 } AVFilterGraphDescFilter;
36 /** Linked-list of links between filters */
37 typedef struct AVFilterGraphDescLink
39 /* TODO: allow referencing pads by name, not just by index */
40 int src; ///< index of the source filter
41 unsigned srcpad; ///< index of the output pad on the source filter
43 int dst; ///< index of the dest filter
44 unsigned dstpad; ///< index of the input pad on the dest filter
46 struct AVFilterGraphDescLink *next;
47 } AVFilterGraphDescLink;
49 /** Linked-list of filter pads to be exported from the graph */
50 typedef struct AVFilterGraphDescExport
52 /* TODO: allow referencing pads by name, not just by index */
53 char *name; ///< name of the exported pad
54 int filter; ///< index of the filter
55 unsigned pad; ///< index of the pad to be exported
57 struct AVFilterGraphDescExport *next;
58 } AVFilterGraphDescExport;
60 /** Description of a graph to be loaded from a file, etc */
63 AVFilterGraphDescFilter *filters; ///< filters in the graph
64 AVFilterGraphDescLink *links; ///< links between the filters
65 AVFilterGraphDescExport *inputs; ///< inputs to export
66 AVFilterGraphDescExport *outputs; ///< outputs to export
69 typedef struct AVFilterGraph {
70 unsigned filter_count;
71 AVFilterContext **filters;
75 * Add to a graph a graph described by a string.
76 * @param graph the filter graph where to link the parsed graph context
77 * @param filters string to be parsed
78 * @param in input to the graph to be parsed (TODO: allow several)
79 * @param inpad pad index of the input
80 * @param in output to the graph to be parsed (TODO: allow several)
81 * @param inpad pad index of the output
82 * @return zero on success, -1 on error
84 int avfilter_graph_parse_chain(AVFilterGraph *graph, const char *filters, AVFilterContext *in, int inpad, AVFilterContext *out, int outpad);
87 * Free a filter graph description.
88 * @param desc The graph description to free
90 void avfilter_graph_free_desc(AVFilterGraphDesc *desc);
93 * Add an existing filter instance to a filter graph.
94 * @param graph The filter graph
95 * @param filter The filter to be added
97 void avfilter_graph_add_filter(AVFilterGraph *graphctx, AVFilterContext *filter);
100 * Configure the formats of all the links in the graph.
102 int avfilter_graph_config_formats(AVFilterGraph *graphctx);
105 * Configure the parameters (resolution, etc) of all links in the graph.
107 int avfilter_graph_config_links(AVFilterGraph *graphctx);
110 int graph_load_from_desc3(AVFilterGraph *ctx, AVFilterGraphDesc *desc,
111 AVFilterContext *in, int inpad,
112 AVFilterContext *out, int outpad);
114 #endif /* FFMPEG_AVFILTERGRAPH_H */