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lavfi: add ff_inoutlink_check_flow()

This commit is contained in:
Nicolas George 2022-02-19 16:13:39 +01:00
parent 12139d1103
commit 531d09fb2d
2 changed files with 16 additions and 0 deletions
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8
libavfilter/avfilter.c
View File

@ -1559,6 +1559,14 @@ int ff_outlink_get_status(AVFilterLink *link)
return link->status_in;
}
int ff_inoutlink_check_flow(AVFilterLink *inlink, AVFilterLink *outlink)
{
return ff_outlink_frame_wanted(outlink) ||
ff_inlink_check_available_frame(inlink) ||
inlink->status_out;
}
const AVClass *avfilter_get_class(void)
{
return &avfilter_class;

8
libavfilter/filters.h
View File

@ -258,4 +258,12 @@ static inline void ff_outlink_set_status(AVFilterLink *link, int status, int64_t
} \
} while (0)
/**
* Check for flow control between input and output.
* This is necessary for filters that may produce several output frames for
* a single input event, otherwise they may produce them all at once,
* causing excessive memory consumption.
*/
int ff_inoutlink_check_flow(AVFilterLink *inlink, AVFilterLink *outlink);
#endif /* AVFILTER_FILTERS_H */