avfiltergraph.h 2.17 KB
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/*
 * Filter graphs
 * copyright (c) 2007 Bobby Bingham
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

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#ifndef FFMPEG_AVFILTERGRAPH_H
#define FFMPEG_AVFILTERGRAPH_H
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#include "avfilter.h"

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typedef struct AVFilterGraph {
    unsigned filter_count;
    AVFilterContext **filters;
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} AVFilterGraph;
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/**
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 * Add to a graph a graph described by a string.
 * @param graph   the filter graph where to link the parsed graph context
 * @param filters string to be parsed
 * @param in      input to the graph to be parsed (TODO: allow several)
 * @param inpad   pad index of the input
 * @param in      output to the graph to be parsed (TODO: allow several)
 * @param inpad   pad index of the output
 * @return        zero on success, -1 on error
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 */
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int avfilter_graph_parse_chain(AVFilterGraph *graph, const char *filters, AVFilterContext *in, int inpad, AVFilterContext *out, int outpad);
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/**
 * Add an existing filter instance to a filter graph.
 * @param graph  The filter graph
 * @param filter The filter to be added
 */
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void avfilter_graph_add_filter(AVFilterGraph *graphctx, AVFilterContext *filter);
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/**
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 * Configure the formats of all the links in the graph.
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 */
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int avfilter_graph_config_formats(AVFilterGraph *graphctx);
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/**
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 * Configure the parameters (resolution, etc) of all links in the graph.
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 */
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int avfilter_graph_config_links(AVFilterGraph *graphctx);
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/**
 * Free a graph and destroy its links.
 */
void avfilter_destroy_graph(AVFilterGraph *graph);

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#endif  /* FFMPEG_AVFILTERGRAPH_H */