Data Fields

AVFilter Struct Reference

Filter definition. More...

#include <avfilter.h>

Data Fields

const char * name
 filter name
int priv_size
 size of private data to allocate for the filter
int(* init )(AVFilterContext *ctx, const char *args, void *opaque)
 Filter initialization function.
void(* uninit )(AVFilterContext *ctx)
 Filter uninitialization function.
int(* query_formats )(AVFilterContext *)
 Queries formats/layouts supported by the filter and its pads, and sets the in_formats/in_chlayouts for links connected to its output pads, and out_formats/out_chlayouts for links connected to its input pads.
const AVFilterPadinputs
 NULL terminated list of inputs. NULL if none.
const AVFilterPadoutputs
 NULL terminated list of outputs. NULL if none.
const char * description
 A description for the filter.

Detailed Description

Filter definition.

This defines the pads a filter contains, and all the callback functions used to interact with the filter.

Definition at line 510 of file avfilter.h.


Field Documentation

const char * AVFilter::description

A description for the filter.

You should use the NULL_IF_CONFIG_SMALL() macro to define it.

Definition at line 547 of file avfilter.h.

int(* AVFilter::init)(AVFilterContext *ctx, const char *args, void *opaque)

Filter initialization function.

Args contains the user-supplied parameters. FIXME: maybe an AVOption-based system would be better? opaque is data provided by the code requesting creation of the filter, and is used to pass data to the filter.

Definition at line 521 of file avfilter.h.

Referenced by av_vsrc_buffer_add_video_buffer_ref(), and avfilter_init_filter().

NULL terminated list of inputs. NULL if none.

Definition at line 540 of file avfilter.h.

Referenced by avfilter_open(), and main().

const char * AVFilter::name

NULL terminated list of outputs. NULL if none.

Definition at line 541 of file avfilter.h.

Referenced by avfilter_open(), and main().

size of private data to allocate for the filter

Definition at line 513 of file avfilter.h.

Referenced by avfilter_open().

Queries formats/layouts supported by the filter and its pads, and sets the in_formats/in_chlayouts for links connected to its output pads, and out_formats/out_chlayouts for links connected to its input pads.

Returns:
zero on success, a negative value corresponding to an AVERROR code otherwise

Definition at line 538 of file avfilter.h.

Referenced by main(), and query_formats().

Filter uninitialization function.

Should deallocate any memory held by the filter, release any buffer references, etc. This does not need to deallocate the AVFilterContext->priv memory itself.

Definition at line 528 of file avfilter.h.

Referenced by avfilter_free().


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