AVFilterLink Struct Reference

A link between two filters. More...

#include <avfilter.h>

Public Types
enum	{ AVLINK_UNINIT = 0, AVLINK_STARTINIT, AVLINK_INIT }
	stage of the initialization of the link properties (dimensions, etc) More...
Data Fields
AVFilterContext *	src
	source filter
unsigned int	srcpad
	index of the output pad on the source filter
AVFilterContext *	dst
	dest filter
unsigned int	dstpad
	index of the input pad on the dest filter
enum AVFilterLink:: { ... }	init_state
	stage of the initialization of the link properties (dimensions, etc)
int	w
	agreed upon image width
int	h
	agreed upon image height
enum PixelFormat	format
	agreed upon image colorspace
AVFilterFormats *	in_formats
	Lists of formats supported by the input and output filters respectively.
AVFilterFormats *	out_formats
AVFilterPicRef *	srcpic
	The picture reference currently being sent across the link by the source filter.
AVFilterPicRef *	cur_pic
AVFilterPicRef *	outpic

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Detailed Description

A link between two filters.

This contains pointers to the source and destination filters between which this link exists, and the indexes of the pads involved. In addition, this link also contains the parameters which have been negotiated and agreed upon between the filter, such as image dimensions, format, etc.

Definition at line 437 of file avfilter.h.

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Member Enumeration Documentation

anonymous enum

stage of the initialization of the link properties (dimensions, etc)

Enumerator:

AVLINK_UNINIT	not started
AVLINK_STARTINIT	started, but incomplete
AVLINK_INIT	complete

Definition at line 446 of file avfilter.h.

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Field Documentation

AVFilterPicRef* AVFilterLink::cur_pic

Definition at line 473 of file avfilter.h.

Referenced by avfilter_default_end_frame(), avfilter_draw_slice(), and avfilter_start_frame().

AVFilterContext* AVFilterLink::dst

dest filter

Definition at line 442 of file avfilter.h.

Referenced by avfilter_default_draw_slice(), avfilter_default_end_frame(), avfilter_default_start_frame(), avfilter_destroy(), avfilter_graph_check_validity(), avfilter_insert_filter(), and avfilter_link().

unsigned int AVFilterLink::dstpad

index of the input pad on the dest filter

Definition at line 443 of file avfilter.h.

Referenced by avfilter_destroy(), avfilter_insert_filter(), and avfilter_link().

enum PixelFormat AVFilterLink::format

agreed upon image colorspace

Definition at line 454 of file avfilter.h.

Referenced by avfilter_default_get_video_buffer(), avfilter_draw_slice(), avfilter_link(), and pick_format().

int AVFilterLink::h

agreed upon image height

Definition at line 453 of file avfilter.h.

Referenced by avfilter_default_config_output_link(), and avfilter_default_get_video_buffer().

AVFilterFormats* AVFilterLink::in_formats

Lists of formats supported by the input and output filters respectively.

These lists are used for negotiating the format to actually be used, which will be loaded into the format member, above, when chosen.

Definition at line 461 of file avfilter.h.

Referenced by avfilter_set_common_formats(), pick_format(), and query_formats().

enum { ... } AVFilterLink::init_state

stage of the initialization of the link properties (dimensions, etc)

Referenced by avfilter_config_links().

AVFilterFormats* AVFilterLink::out_formats

Definition at line 462 of file avfilter.h.

Referenced by avfilter_insert_filter(), avfilter_set_common_formats(), pick_format(), and query_formats().

AVFilterPicRef* AVFilterLink::outpic

Definition at line 474 of file avfilter.h.

Referenced by avfilter_default_end_frame(), and avfilter_default_start_frame().

AVFilterContext* AVFilterLink::src

source filter

Definition at line 439 of file avfilter.h.

Referenced by avfilter_config_links(), avfilter_default_config_output_link(), avfilter_destroy(), avfilter_graph_check_validity(), avfilter_link(), avfilter_poll_frame(), and avfilter_request_frame().

unsigned int AVFilterLink::srcpad

index of the output pad on the source filter

Definition at line 440 of file avfilter.h.

Referenced by avfilter_destroy(), and avfilter_link().

AVFilterPicRef* AVFilterLink::srcpic

The picture reference currently being sent across the link by the source filter.

This is used internally by the filter system to allow automatic copying of pictures which do not have sufficient permissions for the destination. This should not be accessed directly by the filters.

Definition at line 471 of file avfilter.h.

Referenced by avfilter_draw_slice(), avfilter_end_frame(), and avfilter_start_frame().

int AVFilterLink::w

agreed upon image width

Definition at line 452 of file avfilter.h.

Referenced by avfilter_default_config_output_link(), and avfilter_default_get_video_buffer().

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

• libavfilter/avfilter.h