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lavfi: add AVFilter.activate.

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This commit is contained in:
Nicolas George 2016-12-19 08:38:15 +01:00
parent db4a71c0ff
commit 3ff01feda3
2 changed files with 19 additions and 1 deletions
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6
libavfilter/avfilter.c
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@ -1480,8 +1480,12 @@ int ff_filter_activate(AVFilterContext *filter)
{
int ret;
/* Generic timeline support is not yet implemented but should be easy */
av_assert1(!(filter->filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC &&
filter->filter->activate));
filter->ready = 0;
ret = ff_filter_activate_default(filter);
ret = filter->filter->activate ? filter->filter->activate(filter) :
ff_filter_activate_default(filter);
if (ret == FFERROR_NOT_READY)
ret = 0;
return ret;

14
libavfilter/avfilter.h
View File

@ -294,6 +294,20 @@ typedef struct AVFilter {
* used for providing binary data.
*/
int (*init_opaque)(AVFilterContext *ctx, void *opaque);
/**
* Filter activation function.
*
* Called when any processing is needed from the filter, instead of any
* filter_frame and request_frame on pads.
*
* The function must examine inlinks and outlinks and perform a single
* step of processing. If there is nothing to do, the function must do
* nothing and not return an error. If more steps are or may be
* possible, it must use ff_filter_set_ready() to schedule another
* activation.
*/
int (*activate)(AVFilterContext *ctx);
} AVFilter;
/**