AVFilterPad Struct Reference

A filter pad used for either input or output. More...

#include <filters.h>

Data Fields
const char *	name
	Pad name. More...
enum AVMediaType	type
	AVFilterPad type. More...
int	flags
	A combination of AVFILTERPAD_FLAG_* flags. More...
union {
AVFrame *(*   video )(AVFilterLink *link, int w, int h)
AVFrame *(*   audio )(AVFilterLink *link, int       nb_samples)
}	get_buffer
	Callback functions to get a video/audio buffers. More...
int(*	filter_frame )(AVFilterLink *link, AVFrame *frame)
	Filtering callback. More...
int(*	request_frame )(AVFilterLink *link)
	Frame request callback. More...
int(*	config_props )(AVFilterLink *link)
	Link configuration callback. More...

Detailed Description

A filter pad used for either input or output.

Definition at line 38 of file filters.h.

Field Documentation

name

const char* AVFilterPad::name

Pad name.

The name is unique among inputs and among outputs, but an input may have the same name as an output. This may be NULL if this pad has no need to ever be referenced by name.

Examples

decode_filter_audio.c, decode_filter_video.c, and transcode.c.

Definition at line 44 of file filters.h.

Referenced by append_pad(), avfilter_graph_dump_to_buf(), avfilter_graph_parse(), avfilter_graph_request_oldest(), avfilter_pad_get_name(), config_props_output(), configure_filtergraph(), decimate_init(), fieldmatch_init(), graph_check_validity(), init(), init_filter(), init_filters(), join_init(), libplacebo_init(), movie_common_init(), parse_definition(), split_init(), stack_init(), and xfade_opencl_config_output().

type

enum AVMediaType AVFilterPad::type

AVFilterPad type.

Definition at line 49 of file filters.h.

Referenced by avfilter_pad_get_type(), graph_check_validity(), init(), join_init(), movie_common_init(), parse_definition(), split_init(), and stack_init().

flags

int AVFilterPad::flags

A combination of AVFILTERPAD_FLAG_* flags.

Definition at line 67 of file filters.h.

Referenced by append_pad(), ff_append_inpad_free_name(), ff_append_outpad_free_name(), and init().

video

AVFrame*(* AVFilterPad::video) (AVFilterLink *link, int w, int h)

Definition at line 79 of file filters.h.

Referenced by init().

audio

AVFrame*(* AVFilterPad::audio) (AVFilterLink *link, int nb_samples)

Definition at line 80 of file filters.h.

Referenced by init().

get_buffer

union { ... } AVFilterPad::get_buffer

Callback functions to get a video/audio buffers.

If NULL, the filter system will use ff_default_get_video_buffer() for video and ff_default_get_audio_buffer() for audio.

The state of the union is determined by type.

Input pads only.

Referenced by init().

filter_frame

int(* AVFilterPad::filter_frame) (AVFilterLink *link, AVFrame *frame)

Filtering callback.

This is where a filter receives a frame with audio/video data and should do its processing.

Input pads only.

Returns

>= 0 on success, a negative AVERROR on error. This function must ensure that frame is properly unreferenced on error if it hasn't been passed on to another filter.

Definition at line 93 of file filters.h.

Referenced by init().

request_frame

int(* AVFilterPad::request_frame) (AVFilterLink *link)

Frame request callback.

A call to this should result in some progress towards producing output over the given link. This should return zero on success, and another value on error.

Output pads only.

Definition at line 102 of file filters.h.

Referenced by init().

config_props

int(* AVFilterPad::config_props) (AVFilterLink *link)

Link configuration callback.

For output pads, this should set the link properties such as width/height. This should NOT set the format property - that is negotiated between filters by the filter system using the query_formats() callback before this function is called.

For input pads, this should check the properties of the link, and update the filter's internal state as necessary.

For both input and output filters, this should return zero on success, and another value on error.

Definition at line 118 of file filters.h.

Referenced by decimate_init(), fieldmatch_init(), init(), movie_common_init(), and parse_definition().

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The documentation for this struct was generated from the following file:

• libavfilter/filters.h