libavfilter/avfiltergraph.c File Reference

#include <ctype.h>
#include <string.h>
#include "avfilter.h"
#include "avfiltergraph.h"
#include "internal.h"

Go to the source code of this file.

Functions
AVFilterGraph *	avfilter_graph_alloc (void)
	Allocate a filter graph.
void	avfilter_graph_free (AVFilterGraph **graph)
	Free a graph, destroy its links, and set *graph to NULL.
int	avfilter_graph_add_filter (AVFilterGraph *graph, AVFilterContext *filter)
	Add an existing filter instance to a filter graph.
int	avfilter_graph_create_filter (AVFilterContext **filt_ctx, AVFilter *filt, const char *name, const char *args, void *opaque, AVFilterGraph *graph_ctx)
	Create and add a filter instance into an existing graph.
int	ff_avfilter_graph_check_validity (AVFilterGraph *graph, AVClass *log_ctx)
	Check for the validity of graph.
int	ff_avfilter_graph_config_links (AVFilterGraph *graph, AVClass *log_ctx)
	Configure all the links of graphctx.
AVFilterContext *	avfilter_graph_get_filter (AVFilterGraph *graph, char *name)
	Get a filter instance with name name from graph.
static int	query_formats (AVFilterGraph *graph, AVClass *log_ctx)
static void	pick_format (AVFilterLink *link)
static void	pick_formats (AVFilterGraph *graph)
int	ff_avfilter_graph_config_formats (AVFilterGraph *graph, AVClass *log_ctx)
	Configure the formats of all the links in the graph.
int	avfilter_graph_config (AVFilterGraph *graphctx, void *log_ctx)
	Check validity and configure all the links and formats in the graph.

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Function Documentation

int avfilter_graph_add_filter	(	AVFilterGraph *	graphctx,
		AVFilterContext *	filter
	)

Add an existing filter instance to a filter graph.

Parameters:

	graphctx	the filter graph
	filter	the filter to be added

Definition at line 46 of file avfiltergraph.c.

Referenced by avfilter_graph_create_filter(), and create_filter().

AVFilterGraph* avfilter_graph_alloc

(

void

)

Allocate a filter graph.

Definition at line 30 of file avfiltergraph.c.

Referenced by video_thread().

int avfilter_graph_config	(	AVFilterGraph *	graphctx,
		void *	log_ctx
	)

Check validity and configure all the links and formats in the graph.

Parameters:

	graphctx	the filter graph
	log_ctx	context used for logging

Returns:

0 in case of success, a negative AVERROR code otherwise

Definition at line 239 of file avfiltergraph.c.

Referenced by main().

int avfilter_graph_create_filter	(	AVFilterContext **	filt_ctx,
		AVFilter *	filt,
		const char *	name,
		const char *	args,
		void *	opaque,
		AVFilterGraph *	graph_ctx
	)

Create and add a filter instance into an existing graph.

The filter instance is created from the filter filt and inited with the parameters args and opaque.

In case of success put in *filt_ctx the pointer to the created filter instance, otherwise set *filt_ctx to NULL.

Parameters:

	name	the instance name to give to the created filter instance
	graph_ctx	the filter graph

Returns:

a negative AVERROR error code in case of failure, a non negative value otherwise

Definition at line 59 of file avfiltergraph.c.

Referenced by query_formats().

void avfilter_graph_free

(

AVFilterGraph **

graph

)

Free a graph, destroy its links, and set *graph to NULL.

If *graph is NULL, do nothing.

Definition at line 35 of file avfiltergraph.c.

Referenced by video_thread().

AVFilterContext* avfilter_graph_get_filter	(	AVFilterGraph *	graph,
		char *	name
	)

Get a filter instance with name name from graph.

Returns:

the pointer to the found filter instance or NULL if it cannot be found.

Definition at line 127 of file avfiltergraph.c.

int ff_avfilter_graph_check_validity	(	AVFilterGraph *	graphctx,
		AVClass *	log_ctx
	)

Check for the validity of graph.

A graph is considered valid if all its input and output pads are connected.

Returns:

0 in case of success, a negative value otherwise

Definition at line 80 of file avfiltergraph.c.

Referenced by avfilter_graph_config().

int ff_avfilter_graph_config_formats	(	AVFilterGraph *	graph,
		AVClass *	log_ctx
	)

Configure the formats of all the links in the graph.

Definition at line 224 of file avfiltergraph.c.

Referenced by avfilter_graph_config().

int ff_avfilter_graph_config_links	(	AVFilterGraph *	graphctx,
		AVClass *	log_ctx
	)

Configure all the links of graphctx.

Returns:

0 in case of success, a negative value otherwise

Definition at line 110 of file avfiltergraph.c.

Referenced by avfilter_graph_config().

static void pick_format

(

AVFilterLink *

link

)

[static]

Definition at line 191 of file avfiltergraph.c.

Referenced by pick_formats().

static void pick_formats

(

AVFilterGraph *

graph

)

[static]

Definition at line 210 of file avfiltergraph.c.

Referenced by ff_avfilter_graph_config_formats().

static int query_formats	(	AVFilterGraph *	graph,
		AVClass *	log_ctx
	)			[static]

Definition at line 138 of file avfiltergraph.c.

Referenced by ff_avfilter_graph_config_formats().