mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-16 12:24:52 +00:00
1e80a0eaa4
avfilter_graph_parse() declaration to libavfilter/avfiltergraph.h. Simplify, and less confusing for the user. Originally committed as revision 25705 to svn://svn.ffmpeg.org/ffmpeg/trunk
127 lines
3.8 KiB
C
127 lines
3.8 KiB
C
/*
|
|
* 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
|
|
*/
|
|
|
|
#ifndef AVFILTER_AVFILTERGRAPH_H
|
|
#define AVFILTER_AVFILTERGRAPH_H
|
|
|
|
#include "avfilter.h"
|
|
|
|
typedef struct AVFilterGraph {
|
|
unsigned filter_count;
|
|
AVFilterContext **filters;
|
|
|
|
char *scale_sws_opts; ///< sws options to use for the auto-inserted scale filters
|
|
} AVFilterGraph;
|
|
|
|
/**
|
|
* Allocate a filter graph.
|
|
*/
|
|
AVFilterGraph *avfilter_graph_alloc(void);
|
|
|
|
/**
|
|
* Get a filter instance with name name from graph.
|
|
*
|
|
* @return the pointer to the found filter instance or NULL if it
|
|
* cannot be found.
|
|
*/
|
|
AVFilterContext *avfilter_graph_get_filter(AVFilterGraph *graph, char *name);
|
|
|
|
/**
|
|
* Add an existing filter instance to a filter graph.
|
|
*
|
|
* @param graphctx the filter graph
|
|
* @param filter the filter to be added
|
|
*/
|
|
int avfilter_graph_add_filter(AVFilterGraph *graphctx, AVFilterContext *filter);
|
|
|
|
/**
|
|
* Check for the validity of graph.
|
|
*
|
|
* A graph is considered valid if all its input and output pads are
|
|
* connected.
|
|
*
|
|
* @return 0 in case of success, a negative value otherwise
|
|
*/
|
|
int avfilter_graph_check_validity(AVFilterGraph *graphctx, AVClass *log_ctx);
|
|
|
|
/**
|
|
* Configure all the links of graphctx.
|
|
*
|
|
* @return 0 in case of success, a negative value otherwise
|
|
*/
|
|
int avfilter_graph_config_links(AVFilterGraph *graphctx, AVClass *log_ctx);
|
|
|
|
/**
|
|
* Configure the formats of all the links in the graph.
|
|
*/
|
|
int avfilter_graph_config_formats(AVFilterGraph *graphctx, AVClass *log_ctx);
|
|
|
|
/**
|
|
* Check validity and configure all the links and formats in the graph.
|
|
*
|
|
* @see avfilter_graph_check_validity(), avfilter_graph_config_links(),
|
|
* avfilter_graph_config_formats()
|
|
*/
|
|
int avfilter_graph_config(AVFilterGraph *graphctx, AVClass *log_ctx);
|
|
|
|
/**
|
|
* Free a graph and destroy its links.
|
|
*/
|
|
void avfilter_graph_free(AVFilterGraph *graph);
|
|
|
|
/**
|
|
* A linked-list of the inputs/outputs of the filter chain.
|
|
*
|
|
* This is mainly useful for avfilter_graph_parse(), since this
|
|
* function may accept a description of a graph with not connected
|
|
* input/output pads. This struct specifies, per each not connected
|
|
* pad contained in the graph, the filter context and the pad index
|
|
* required for establishing a link.
|
|
*/
|
|
typedef struct AVFilterInOut {
|
|
/** unique name for this input/output in the list */
|
|
char *name;
|
|
|
|
/** filter context associated to this input/output */
|
|
AVFilterContext *filter_ctx;
|
|
|
|
/** index of the filt_ctx pad to use for linking */
|
|
int pad_idx;
|
|
|
|
/** next input/input in the list, NULL if this is the last */
|
|
struct AVFilterInOut *next;
|
|
} AVFilterInOut;
|
|
|
|
/**
|
|
* Add a graph described by a string to a graph.
|
|
*
|
|
* @param graph the filter graph where to link the parsed graph context
|
|
* @param filters string to be parsed
|
|
* @param inputs linked list to the inputs of the graph
|
|
* @param outputs linked list to the outputs of the graph
|
|
* @return zero on success, a negative AVERROR code on error
|
|
*/
|
|
int avfilter_graph_parse(AVFilterGraph *graph, const char *filters,
|
|
AVFilterInOut *inputs, AVFilterInOut *outputs,
|
|
AVClass *log_ctx);
|
|
|
|
#endif /* AVFILTER_AVFILTERGRAPH_H */
|