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lavu/opt: add a more general child class iteration API

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Use opaque iteration state instead of the previous child class. This
mirrors similar changes done in lavf/lavc.

Deprecate the av_opt_child_class_next() API.
This commit is contained in:
Anton Khirnov 2020-05-27 15:21:30 +02:00
parent 202e06870e
commit 1b4a98b029
5 changed files with 71 additions and 12 deletions
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18
libavutil/log.h
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@ -112,6 +112,7 @@ typedef struct AVClass {
*/
void* (*child_next)(void *obj, void *prev);
#if FF_API_CHILD_CLASS_NEXT
/**
* Return an AVClass corresponding to the next potential
* AVOptions-enabled child.
@ -120,7 +121,9 @@ typedef struct AVClass {
* child_next iterates over _already existing_ objects, while
* child_class_next iterates over _all possible_ children.
*/
attribute_deprecated
const struct AVClass* (*child_class_next)(const struct AVClass *prev);
#endif
/**
* Category used for visualization (like color)
@ -140,6 +143,21 @@ typedef struct AVClass {
* available since version (52.12)
*/
int (*query_ranges)(struct AVOptionRanges **, void *obj, const char *key, int flags);
/**
* Iterate over the AVClasses corresponding to potential AVOptions-enabled
* children.
*
* @param iter pointer to opaque iteration state. The caller must initialize
* *iter to NULL before the first call.
* @return AVClass for the next AVOptions-enabled child or NULL if there are
* no more such children.
*
* @note The difference between child_next and this is that child_next
* iterates over _already existing_ objects, while child_class_iterate
* iterates over _all possible_ children.
*/
const struct AVClass* (*child_class_iterate)(void **iter);
} AVClass;
/**