ffmpeg / libavfilter / avfiltergraph.h @ 97dd1e4a
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/*
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* Filter graphs
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* copyright (c) 2007 Bobby Bingham
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVFILTER_AVFILTERGRAPH_H
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#define AVFILTER_AVFILTERGRAPH_H
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#include "avfilter.h" |
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typedef struct AVFilterGraph { |
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unsigned filter_count;
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AVFilterContext **filters; |
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char *scale_sws_opts; ///< sws options to use for the auto-inserted scale filters |
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} AVFilterGraph; |
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/**
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* Allocate a filter graph.
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*/
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AVFilterGraph *avfilter_graph_alloc(void);
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/**
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* Get a filter instance with name name from graph.
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*
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* @return the pointer to the found filter instance or NULL if it
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* cannot be found.
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*/
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AVFilterContext *avfilter_graph_get_filter(AVFilterGraph *graph, char *name);
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/**
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* Add an existing filter instance to a filter graph.
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*
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* @param graphctx the filter graph
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* @param filter the filter to be added
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*/
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int avfilter_graph_add_filter(AVFilterGraph *graphctx, AVFilterContext *filter);
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/**
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* Check for the validity of graph.
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*
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* A graph is considered valid if all its input and output pads are
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* connected.
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*
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* @return 0 in case of success, a negative value otherwise
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*/
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int avfilter_graph_check_validity(AVFilterGraph *graphctx, AVClass *log_ctx);
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/**
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* Configure all the links of graphctx.
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*
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* @return 0 in case of success, a negative value otherwise
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*/
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int avfilter_graph_config_links(AVFilterGraph *graphctx, AVClass *log_ctx);
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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, AVClass *log_ctx);
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/**
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* Check validity and configure all the links and formats in the graph.
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*
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* @see avfilter_graph_check_validity(), avfilter_graph_config_links(),
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* avfilter_graph_config_formats()
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*/
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int avfilter_graph_config(AVFilterGraph *graphctx, AVClass *log_ctx);
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/**
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* Free a graph and destroy its links.
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*/
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void avfilter_graph_free(AVFilterGraph *graph);
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#endif /* AVFILTER_AVFILTERGRAPH_H */ |