avfilter.h File Reference

external API header More...

#include <stddef.h>
#include "libavutil/avutil.h"
#include "libavutil/dict.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	AVFilterBuffer
	A reference-counted buffer data type used by the filter system. More...
struct	AVFilterBufferRefAudioProps
	Audio specific properties in a reference to an AVFilterBuffer. More...
struct	AVFilterBufferRefVideoProps
	Video specific properties in a reference to an AVFilterBuffer. More...
struct	AVFilterBufferRef
	A reference to an AVFilterBuffer. More...
struct	AVFilter
	Filter definition. More...
struct	AVFilterContext
	An instance of a filter. More...
struct	AVFilterLink
	A link between two filters. More...

Macros
#define	AV_PERM_READ   0x01
	can read from the buffer
#define	AV_PERM_WRITE   0x02
	can write to the buffer
#define	AV_PERM_PRESERVE   0x04
	nobody else can overwrite the buffer
#define	AV_PERM_REUSE   0x08
	can output the buffer multiple times, with the same contents each time
#define	AV_PERM_REUSE2   0x10
	can output the buffer multiple times, modified each time
#define	AV_PERM_NEG_LINESIZES   0x20
	the buffer requested can have negative linesizes
#define	AV_PERM_ALIGN   0x40
	the buffer must be aligned
#define	AVFILTER_ALIGN   16
#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)

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.
const AVClass *	avfilter_get_class (void)
	Get the class for the AVFilterContext struct.
void	avfilter_copy_buffer_ref_props (AVFilterBufferRef *dst, AVFilterBufferRef *src)
	Copy properties of src to dst, without copying the actual data.
AVFilterBufferRef *	avfilter_ref_buffer (AVFilterBufferRef *ref, int pmask)
	Add a new reference to a buffer.
void	avfilter_unref_buffer (AVFilterBufferRef *ref)
	Remove a reference to a buffer.
void	avfilter_unref_bufferp (AVFilterBufferRef **ref)
	Remove a reference to a buffer and set the pointer to NULL.
int	avfilter_ref_get_channels (AVFilterBufferRef *ref)
	Get the number of channels of a buffer reference.
const char *	avfilter_pad_get_name (AVFilterPad *pads, int pad_idx)
	Get the name of an AVFilterPad.
enum AVMediaType	avfilter_pad_get_type (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.
AVFilterBufferRef *	avfilter_get_video_buffer_ref_from_arrays (uint8_t *const data[4], const int linesize[4], int perms, int w, int h, enum AVPixelFormat format)
	Create a buffer reference wrapped around an already allocated image buffer.
AVFilterBufferRef *	avfilter_get_audio_buffer_ref_from_arrays (uint8_t **data, int linesize, int perms, int nb_samples, enum AVSampleFormat sample_fmt, uint64_t channel_layout)
	Create an audio buffer reference wrapped around an already allocated samples buffer.
AVFilterBufferRef *	avfilter_get_audio_buffer_ref_from_arrays_channels (uint8_t **data, int linesize, int perms, int nb_samples, enum AVSampleFormat sample_fmt, int channels, uint64_t channel_layout)
	Create an audio buffer reference wrapped around an already allocated samples buffer.
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.
void	avfilter_uninit (void)
	Uninitialize the filter system.
int	avfilter_register (AVFilter *filter)
	Register a filter.
AVFilter *	avfilter_get_by_name (const char *name)
	Get a filter definition matching the given name.
AVFilter **	av_filter_next (AVFilter **filter)
	If filter is NULL, returns a pointer to the first registered filter pointer, if filter is non-NULL, returns the next pointer after filter.
int	avfilter_open (AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
	Create a filter instance.
int	avfilter_init_filter (AVFilterContext *filter, const char *args, void *opaque)
	Initialize a filter.
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.

Detailed Description

external API header

Definition in file avfilter.h.