avfilter: add ff_inlink_queued_samples()

libavfilter/avfilter.c

@@ -1458,6 +1458,11 @@ int ff_inlink_check_available_frame(AVFilterLink *link)
     return ff_framequeue_queued_frames(&link->fifo) > 0;
 }
 
+int ff_inlink_queued_samples(AVFilterLink *link)
+{
+    return ff_framequeue_queued_samples(&link->fifo);
+}
+
 int ff_inlink_check_available_samples(AVFilterLink *link, unsigned min)
 {
     uint64_t samples = ff_framequeue_queued_samples(&link->fifo);

libavfilter/filters.h

@@ -72,6 +72,13 @@ size_t ff_inlink_queued_frames(AVFilterLink *link);
  */
 int ff_inlink_check_available_frame(AVFilterLink *link);
 
+
+/***
+  * Get the number of samples available on the link.
+  * @return the numer of samples available on the link.
+  */
+int ff_inlink_queued_samples(AVFilterLink *link);
+
 /**
  * Test if enough samples are available on the link.
  * @return  >0 if enough samples are available