lavfi: add a preinit callback to filters.

It is necessary for filters with child objects, to set the class and default options values.

Nicolas George committed 9 years ago

Commit f8d7b5f1 parent 19804022 files · +23 −0Browse files

Showing the changes to libavfilter/avfilter.h (1 of 2 files). Show all

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@@ -194,6 +194,21 @@ typedef struct AVFilter { · 193 unmodified lines
194	*****************************************************************	194	*****************************************************************
195	*/	195	*/
196		196
		197	/**
		198	* Filter pre-initialization function
		199	*
		200	* This callback will be called immediately after the filter context is
		201	* allocated, to allow allocating and initing sub-objects.
		202	*
		203	* If this callback is not NULL, the uninit callback will be called on
		204	* allocation failure.
		205	*
		206	* @return 0 on success,
		207	* AVERROR code on failure (but the code will be
		208	* dropped and treated as ENOMEM by the calling code)
		209	*/
		210	int (preinit)(AVFilterContext ctx);
		211
197	/**	212	/**
198	* Filter initialization function.	213	* Filter initialization function.
199	*	214	*

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