@@ -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;
@@ -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 */
Signed-off-by: Nicolas George <george@nsup.org> --- libavfilter/avfilter.c | 8 ++++++++ libavfilter/filters.h | 8 ++++++++ 2 files changed, 16 insertions(+)