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4fcbb2af33
ff_avfilter_graph_check_validity() ff_avfilter_graph_config_links() ff_avfilter_graph_config_formats() and move their declaration to internal.h. These functions are never used in application code, so it is better to consider them internal functions, this can be changed later if necessary. Simplify API. Originally committed as revision 25737 to svn://svn.ffmpeg.org/ffmpeg/trunk
106 lines
3.3 KiB
C
106 lines
3.3 KiB
C
/*
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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 validity and configure all the links and formats in the graph.
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*
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* @param graphctx the filter graph
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* @param log_ctx context used for logging
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* @return 0 in case of success, a negative AVERROR code otherwise
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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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/**
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* A linked-list of the inputs/outputs of the filter chain.
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*
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* This is mainly useful for avfilter_graph_parse(), since this
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* function may accept a description of a graph with not connected
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* input/output pads. This struct specifies, per each not connected
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* pad contained in the graph, the filter context and the pad index
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* required for establishing a link.
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*/
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typedef struct AVFilterInOut {
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/** unique name for this input/output in the list */
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char *name;
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/** filter context associated to this input/output */
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AVFilterContext *filter_ctx;
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/** index of the filt_ctx pad to use for linking */
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int pad_idx;
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/** next input/input in the list, NULL if this is the last */
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struct AVFilterInOut *next;
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} AVFilterInOut;
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/**
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* Add a graph described by a string to a graph.
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*
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* @param graph the filter graph where to link the parsed graph context
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* @param filters string to be parsed
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* @param inputs linked list to the inputs of the graph
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* @param outputs linked list to the outputs of the graph
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* @return zero on success, a negative AVERROR code on error
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*/
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int avfilter_graph_parse(AVFilterGraph *graph, const char *filters,
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AVFilterInOut *inputs, AVFilterInOut *outputs,
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AVClass *log_ctx);
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#endif /* AVFILTER_AVFILTERGRAPH_H */
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