avfilter.h File Reference

Main libavfilter public API header. More...

#include <stddef.h>
#include "libavutil/attributes.h"
#include "libavutil/avutil.h"
#include "libavutil/dict.h"
#include "libavutil/frame.h"
#include "libavutil/log.h"
#include "libavutil/samplefmt.h"
#include "libavutil/pixfmt.h"
#include "libavutil/rational.h"
#include "libavfilter/version.h"

Go to the source code of this file.

Data Structures
struct	AVFilter
	Filter definition. More...
struct	AVFilterContext
	An instance of a filter. More...
struct	AVFilterLink
	A link between two filters. More...
struct	AVFilterGraph
struct	AVFilterInOut
	A linked-list of the inputs/outputs of the filter chain. More...

Macros
#define	AVFILTER_FLAG_DYNAMIC_INPUTS   (1 << 0)
	The number of the filter inputs is not determined just by AVFilter.inputs.
#define	AVFILTER_FLAG_DYNAMIC_OUTPUTS   (1 << 1)
	The number of the filter outputs is not determined just by AVFilter.outputs.
#define	AVFILTER_FLAG_SLICE_THREADS   (1 << 2)
	The filter supports multithreading by splitting frames into multiple parts and processing them concurrently.
#define	AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC   (1 << 16)
	Some filters support a generic "enable" expression option that can be used to enable or disable a filter in the timeline.
#define	AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL   (1 << 17)
	Same as AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, except that the filter will have its filter_frame() callback(s) called as usual even when the enable expression is false.
#define	AVFILTER_FLAG_SUPPORT_TIMELINE   (AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL)
	Handy mask to test whether the filter supports or no the timeline feature (internally or generically).
#define	AVFILTER_THREAD_SLICE   (1 << 0)
	Process multiple parts of the frame concurrently.
#define	AVFILTER_CMD_FLAG_ONE   1
	Stop once a filter understood the command (for target=all for example), fast filters are favored automatically.
#define	AVFILTER_CMD_FLAG_FAST   2
	Only execute command when its fast (like a video out that supports contrast adjustment in hw)

Typedefs
typedef int(	avfilter_action_func )(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
	A function pointer passed to the AVFilterGraph::execute callback to be executed multiple times, possibly in parallel.
typedef int(	avfilter_execute_func )(AVFilterContext *ctx, avfilter_action_func *func, void *arg, int *ret, int nb_jobs)
	A function executing multiple jobs, possibly in parallel.

Enumerations
enum	{ AVFILTER_AUTO_CONVERT_ALL = 0, AVFILTER_AUTO_CONVERT_NONE = -1 }

Functions
unsigned	avfilter_version (void)
	Return the LIBAVFILTER_VERSION_INT constant.
const char *	avfilter_configuration (void)
	Return the libavfilter build-time configuration.
const char *	avfilter_license (void)
	Return the libavfilter license.
attribute_deprecated int	avfilter_ref_get_channels (AVFilterBufferRef *ref)
	Get the number of channels of a buffer reference.
int	avfilter_pad_count (const AVFilterPad *pads)
	Get the number of elements in a NULL-terminated array of AVFilterPads (e.g.
const char *	avfilter_pad_get_name (const AVFilterPad *pads, int pad_idx)
	Get the name of an AVFilterPad.
enum AVMediaType	avfilter_pad_get_type (const AVFilterPad *pads, int pad_idx)
	Get the type of an AVFilterPad.
int	avfilter_link (AVFilterContext *src, unsigned srcpad, AVFilterContext *dst, unsigned dstpad)
	Link two filters together.
void	avfilter_link_free (AVFilterLink **link)
	Free the link in *link, and set its pointer to NULL.
int	avfilter_link_get_channels (AVFilterLink *link)
	Get the number of channels of a link.
void	avfilter_link_set_closed (AVFilterLink *link, int closed)
	Set the closed field of a link.
int	avfilter_config_links (AVFilterContext *filter)
	Negotiate the media format, dimensions, etc of all inputs to a filter.
int	avfilter_process_command (AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags)
	Make the filter instance process a command.
void	avfilter_register_all (void)
	Initialize the filter system.
int	avfilter_register (AVFilter *filter)
	Register a filter.
const AVFilter *	avfilter_get_by_name (const char *name)
	Get a filter definition matching the given name.
const AVFilter *	avfilter_next (const AVFilter *prev)
	Iterate over all registered filters.
int	avfilter_init_str (AVFilterContext *ctx, const char *args)
	Initialize a filter with the supplied parameters.
int	avfilter_init_dict (AVFilterContext *ctx, AVDictionary **options)
	Initialize a filter with the supplied dictionary of options.
void	avfilter_free (AVFilterContext *filter)
	Free a filter context.
int	avfilter_insert_filter (AVFilterLink *link, AVFilterContext *filt, unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
	Insert a filter in the middle of an existing link.
const AVClass *	avfilter_get_class (void)
AVFilterGraph *	avfilter_graph_alloc (void)
	Allocate a filter graph.
AVFilterContext *	avfilter_graph_alloc_filter (AVFilterGraph *graph, const AVFilter *filter, const char *name)
	Create a new filter instance in a filter graph.
AVFilterContext *	avfilter_graph_get_filter (AVFilterGraph *graph, const char *name)
	Get a filter instance identified by instance name from graph.
int	avfilter_graph_create_filter (AVFilterContext **filt_ctx, const AVFilter *filt, const char *name, const char *args, void *opaque, AVFilterGraph *graph_ctx)
	Create and add a filter instance into an existing graph.
void	avfilter_graph_set_auto_convert (AVFilterGraph *graph, unsigned flags)
	Enable or disable automatic format conversion inside the graph.
int	avfilter_graph_config (AVFilterGraph *graphctx, void *log_ctx)
	Check validity and configure all the links and formats in the graph.
void	avfilter_graph_free (AVFilterGraph **graph)
	Free a graph, destroy its links, and set *graph to NULL.
AVFilterInOut *	avfilter_inout_alloc (void)
	Allocate a single AVFilterInOut entry.
void	avfilter_inout_free (AVFilterInOut **inout)
	Free the supplied list of AVFilterInOut and set *inout to NULL.
int	avfilter_graph_parse (AVFilterGraph *graph, const char *filters, AVFilterInOut *inputs, AVFilterInOut *outputs, void *log_ctx)
	Add a graph described by a string to a graph.
int	avfilter_graph_parse_ptr (AVFilterGraph *graph, const char *filters, AVFilterInOut **inputs, AVFilterInOut **outputs, void *log_ctx)
	Add a graph described by a string to a graph.
int	avfilter_graph_parse2 (AVFilterGraph *graph, const char *filters, AVFilterInOut **inputs, AVFilterInOut **outputs)
	Add a graph described by a string to a graph.
int	avfilter_graph_send_command (AVFilterGraph *graph, const char *target, const char *cmd, const char *arg, char *res, int res_len, int flags)
	Send a command to one or more filter instances.
int	avfilter_graph_queue_command (AVFilterGraph *graph, const char *target, const char *cmd, const char *arg, int flags, double ts)
	Queue a command for one or more filter instances.
char *	avfilter_graph_dump (AVFilterGraph *graph, const char *options)
	Dump a graph into a human-readable string representation.
int	avfilter_graph_request_oldest (AVFilterGraph *graph)
	Request a frame on the oldest sink link.

Detailed Description

Main libavfilter public API header.

Definition in file avfilter.h.