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Describe the class of an AVClass context structure. More...
#include <log.h>
Data Fields | |
| const char * | class_name |
| The name of the class; usually it is the same name as the context structure type to which the AVClass is associated. | |
| const char *(* | item_name )(void *ctx) |
| A pointer to a function which returns the name of a context instance ctx associated with the class. | |
| struct AVOption * | option |
| a pointer to the first option specified in the class if any or NULL | |
| int | version |
| LIBAVUTIL_VERSION with which this structure was created. | |
| int | log_level_offset_offset |
| Offset in the structure where log_level_offset is stored. | |
| int | parent_log_context_offset |
| Offset in the structure where a pointer to the parent context for logging is stored. | |
| void *(* | child_next )(void *obj, void *prev) |
| Return next AVOptions-enabled child or NULL. | |
| struct AVClass *(* | child_class_next )(const struct AVClass *prev) |
| Return an AVClass corresponding to the next potential AVOptions-enabled child. | |
| AVClassCategory | category |
| Category used for visualization (like color) This is only set if the category is equal for all objects using this class. | |
| AVClassCategory(* | get_category )(void *ctx) |
| Callback to return the category. | |
| int(* | query_ranges )(struct AVOptionRanges **, void *obj, const char *key, int flags) |
| Callback to return the supported/allowed ranges. | |
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.).
| 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.
Definition at line 55 of file log.h.
Referenced by av_parse_cpu_caps(), av_parse_cpu_flags(), show_codec_opts(), and show_format_opts().
| 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.
Definition at line 61 of file log.h.
Referenced by format_line(), and http_av_log().
| struct AVOption* AVClass::option |
a pointer to the first option specified in the class if any or NULL
Definition at line 68 of file log.h.
Referenced by av_opt_next().
| 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.
Definition at line 76 of file log.h.
Referenced by av_log(), av_opt_query_ranges(), and get_category().
| int AVClass::log_level_offset_offset |
| 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.
Definition at line 91 of file log.h.
Referenced by format_line().
Return next AVOptions-enabled child or NULL.
Definition at line 96 of file log.h.
Referenced by av_opt_child_next().
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.
Definition at line 106 of file log.h.
Referenced by av_opt_child_class_next().
| 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)
Definition at line 113 of file log.h.
Referenced by get_category().
| AVClassCategory(* AVClass::get_category)(void *ctx) |
Callback to return the category.
available since version (51 << 16 | 59 << 8 | 100)
Definition at line 119 of file log.h.
Referenced by get_category().
| 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)
Definition at line 125 of file log.h.
Referenced by av_opt_query_ranges().
1.8.2
