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lavfi: add ff_inlink_request_frame().

This commit is contained in:
Nicolas George 2016-12-24 13:16:59 +01:00
parent d3cb140433
commit 9eb4c79afd
2 changed files with 16 additions and 0 deletions
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8
libavfilter/avfilter.c
View File

@ -1638,6 +1638,14 @@ int ff_inlink_evaluate_timeline_at_frame(AVFilterLink *link, const AVFrame *fram
return fabs(av_expr_eval(dstctx->enable, dstctx->var_values, NULL)) >= 0.5;
}
void ff_inlink_request_frame(AVFilterLink *link)
{
av_assert1(!link->status_in);
av_assert1(!link->status_out);
link->frame_wanted_out = 1;
ff_filter_set_ready(link->src, 100);
}
const AVClass *avfilter_get_class(void)
{
return &avfilter_class;

8
libavfilter/filters.h
View File

@ -126,4 +126,12 @@ int ff_inlink_make_frame_writable(AVFilterLink *link, AVFrame **rframe);
*/
int ff_inlink_acknowledge_status(AVFilterLink *link, int *rstatus, int64_t *rpts);
/**
* Mark that a frame is wanted on the link.
* Unlike ff_filter_frame(), it must not be called when the link has a
* non-zero status, and thus does not acknowledge it.
* Also it cannot fail.
*/
void ff_inlink_request_frame(AVFilterLink *link);
#endif /* AVFILTER_FILTERS_H */