mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
105 lines
3.3 KiB
105 lines
3.3 KiB
/* |
|
* 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 validity and configure all the links and formats in the graph. |
|
* |
|
* @param graphctx the filter graph |
|
* @param log_ctx context used for logging |
|
* @return 0 in case of success, a negative AVERROR code otherwise |
|
*/ |
|
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 */
|
|
|