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57d4a1575c
can be created programmatically or loaded from a file. Commited in SoC by Bobby Bingham on 2007-08-14 22:27:05 Originally committed as revision 12700 to svn://svn.ffmpeg.org/ffmpeg/trunk
95 lines
3.2 KiB
C
95 lines
3.2 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 FFMPEG_AVFILTER_GRAPH_H
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#define FFMPEG_AVFILTER_GRAPH_H
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#include "avfilter.h"
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/** Linked-list of filters to create for an AVFilterGraphDesc */
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typedef struct AVFilterGraphDescFilter
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{
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char *name; ///< filter instance name
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char *filter; ///< name of filter type
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char *args; ///< filter parameters
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struct AVFilterGraphDescFilter *next;
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} AVFilterGraphDescFilter;
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/** Linked-list of links between filters */
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typedef struct AVFilterGraphDescLink
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{
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/* TODO: allow referencing pads by name, not just by index */
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char *src; ///< name of the source filter
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unsigned srcpad; ///< index of the output pad on the source filter
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char *dst; ///< name of the dest filter
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unsigned dstpad; ///< index of the input pad on the dest filter
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struct AVFilterGraphDescLink *next;
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} AVFilterGraphDescLink;
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/** Linked-list of filter pads to be exported from the graph */
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typedef struct AVFilterGraphDescExport
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{
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/* TODO: allow referencing pads by name, not just by index */
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char *name; ///< name of the exported pad
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char *filter; ///< name of the filter
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unsigned pad; ///< index of the pad to be exported
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struct AVFilterGraphDescExport *next;
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} AVFilterGraphDescExport;
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/** Description of a graph to be loaded from a file, etc */
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typedef struct
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{
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AVFilterGraphDescFilter *filters; ///< filters in the graph
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AVFilterGraphDescLink *links; ///< links between the filters
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AVFilterGraphDescExport *inputs; ///< inputs to export
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AVFilterGraphDescExport *outputs; ///< outputs to export
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} AVFilterGraphDesc;
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/**
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* Load a filter graph description from a file
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* @param filename Name of the file from which to load the description
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* @return Pointer to the description on success. NULL on failure
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*/
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AVFilterGraphDesc *avfilter_graph_load_desc(const char *filename);
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/**
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* Free a filter graph description
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* @param desc The graph description to free
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*/
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void avfilter_graph_free_desc(AVFilterGraphDesc *desc);
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/**
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* Add an existing filter instance to a filter graph.
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* @param graph The filter graph
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* @param filter The filter to be added
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*/
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void avfilter_graph_add_filter(AVFilterContext *graphctx, AVFilterContext *filter);
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/**
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* Configure the colorspace, resolution, etc of all links in the graph
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*/
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int avfilter_graph_config_links(AVFilterContext *graphctx);
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#endif /* FFMPEG_AVFILTER_H */
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