Miam-Player  0.8.0
A nice music player
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AVClass Struct Reference

#include <log.h>

Public Attributes

const char * class_name
 
const char *(* item_name )(void *ctx)
 
const struct AVOption * option
 
int version
 
int log_level_offset_offset
 
int parent_log_context_offset
 
void *(* child_next )(void *obj, void *prev)
 
const struct AVClass *(* child_class_next )(const struct AVClass *prev)
 
AVClassCategory category
 
AVClassCategory(* get_category )(void *ctx)
 
int(* query_ranges )(struct AVOptionRanges **, void *obj, const char *key, int flags)
 

Detailed Description

Describe the class of an AVClass context structure. That is an arbitrary struct of which the first field is a pointer to an AVClass struct (e.g. AVCodecContext, AVFormatContext etc.).

Member Data Documentation

AVClassCategory AVClass::category

Category used for visualization (like color) This is only set if the category is equal for all objects using this class. available since version (51 << 16 | 56 << 8 | 100)

const struct AVClass*(* AVClass::child_class_next) (const struct AVClass *prev)

Return an AVClass corresponding to the next potential AVOptions-enabled child.

The difference between child_next and this is that child_next iterates over already existing objects, while child_class_next iterates over all possible children.

void*(* AVClass::child_next) (void *obj, void *prev)

Return next AVOptions-enabled child or NULL

const char* AVClass::class_name

The name of the class; usually it is the same name as the context structure type to which the AVClass is associated.

AVClassCategory(* AVClass::get_category) (void *ctx)

Callback to return the category. available since version (51 << 16 | 59 << 8 | 100)

const char*(* AVClass::item_name) (void *ctx)

A pointer to a function which returns the name of a context instance ctx associated with the class.

int AVClass::log_level_offset_offset

Offset in the structure where log_level_offset is stored. 0 means there is no such variable

const struct AVOption* AVClass::option

a pointer to the first option specified in the class if any or NULL

See also
av_set_default_options()
int AVClass::parent_log_context_offset

Offset in the structure where a pointer to the parent context for logging is stored. For example a decoder could pass its AVCodecContext to eval as such a parent context, which an av_log() implementation could then leverage to display the parent context. The offset can be NULL.

int(* AVClass::query_ranges) (struct AVOptionRanges **, void *obj, const char *key, int flags)

Callback to return the supported/allowed ranges. available since version (52.12)

int AVClass::version

LIBAVUTIL_VERSION with which this structure was created. This is used to allow fields to be added without requiring major version bumps everywhere.

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