avfilter.h File Reference

Main libavfilter public API header. More...

#include <stddef.h>
#include "libavutil/attributes.h"
#include "libavutil/avutil.h"
#include "libavutil/buffer.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_major.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	AVFilterFormatsConfig
	Lists of formats / etc. 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. More...
#define	AVFILTER_FLAG_DYNAMIC_OUTPUTS   (1 << 1)
	The number of the filter outputs is not determined just by AVFilter.outputs. More...
#define	AVFILTER_FLAG_SLICE_THREADS   (1 << 2)
	The filter supports multithreading by splitting frames into multiple parts and processing them concurrently. More...
#define	AVFILTER_FLAG_METADATA_ONLY   (1 << 3)
	The filter is a "metadata" filter - it does not modify the frame data in any way. More...
#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. More...
#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. More...
#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). More...
#define	AVFILTER_THREAD_SLICE   (1 << 0)
	Process multiple parts of the frame concurrently. More...
#define	AVFILTER_CMD_FLAG_ONE   1
	Stop once a filter understood the command (for target=all for example), fast filters are favored automatically. More...
#define	AVFILTER_CMD_FLAG_FAST   2
	Only execute command when its fast (like a video out that supports contrast adjustment in hw) More...

Typedefs
typedef struct AVFilterPad	AVFilterPad
typedef struct AVFilterFormats	AVFilterFormats
typedef struct AVFilterChannelLayouts	AVFilterChannelLayouts
typedef struct AVFilterInternal	AVFilterInternal
typedef struct AVFilterGraphInternal	AVFilterGraphInternal
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. More...
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. More...

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

Functions
unsigned	avfilter_version (void)
	Return the LIBAVFILTER_VERSION_INT constant. More...
const char *	avfilter_configuration (void)
	Return the libavfilter build-time configuration. More...
const char *	avfilter_license (void)
	Return the libavfilter license. More...
attribute_deprecated int	avfilter_pad_count (const AVFilterPad *pads)
	Get the number of elements in an AVFilter's inputs or outputs array. More...
const char *	avfilter_pad_get_name (const AVFilterPad *pads, int pad_idx)
	Get the name of an AVFilterPad. More...
enum AVMediaType	avfilter_pad_get_type (const AVFilterPad *pads, int pad_idx)
	Get the type of an AVFilterPad. More...
unsigned	avfilter_filter_pad_count (const AVFilter *filter, int is_output)
	Get the number of elements in an AVFilter's inputs or outputs array. More...
int	avfilter_link (AVFilterContext *src, unsigned srcpad, AVFilterContext *dst, unsigned dstpad)
	Link two filters together. More...
void	avfilter_link_free (AVFilterLink **link)
	Free the link in *link, and set its pointer to NULL. More...
int	avfilter_config_links (AVFilterContext *filter)
	Negotiate the media format, dimensions, etc of all inputs to a filter. More...
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. More...
const AVFilter *	av_filter_iterate (void **opaque)
	Iterate over all registered filters. More...
const AVFilter *	avfilter_get_by_name (const char *name)
	Get a filter definition matching the given name. More...
int	avfilter_init_str (AVFilterContext *ctx, const char *args)
	Initialize a filter with the supplied parameters. More...
int	avfilter_init_dict (AVFilterContext *ctx, AVDictionary **options)
	Initialize a filter with the supplied dictionary of options. More...
void	avfilter_free (AVFilterContext *filter)
	Free a filter context. More...
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. More...
const AVClass *	avfilter_get_class (void)
AVFilterGraph *	avfilter_graph_alloc (void)
	Allocate a filter graph. More...
AVFilterContext *	avfilter_graph_alloc_filter (AVFilterGraph *graph, const AVFilter *filter, const char *name)
	Create a new filter instance in a filter graph. More...
AVFilterContext *	avfilter_graph_get_filter (AVFilterGraph *graph, const char *name)
	Get a filter instance identified by instance name from graph. More...
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. More...
void	avfilter_graph_set_auto_convert (AVFilterGraph *graph, unsigned flags)
	Enable or disable automatic format conversion inside the graph. More...
int	avfilter_graph_config (AVFilterGraph *graphctx, void *log_ctx)
	Check validity and configure all the links and formats in the graph. More...
void	avfilter_graph_free (AVFilterGraph **graph)
	Free a graph, destroy its links, and set *graph to NULL. More...
AVFilterInOut *	avfilter_inout_alloc (void)
	Allocate a single AVFilterInOut entry. More...
void	avfilter_inout_free (AVFilterInOut **inout)
	Free the supplied list of AVFilterInOut and set *inout to NULL. More...
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. More...
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. More...
int	avfilter_graph_parse2 (AVFilterGraph *graph, const char *filters, AVFilterInOut **inputs, AVFilterInOut **outputs)
	Add a graph described by a string to a graph. More...
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. More...
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. More...
char *	avfilter_graph_dump (AVFilterGraph *graph, const char *options)
	Dump a graph into a human-readable string representation. More...
int	avfilter_graph_request_oldest (AVFilterGraph *graph)
	Request a frame on the oldest sink link. More...

Detailed Description

Main libavfilter public API header.

Definition in file avfilter.h.