+ /*
+ * Force a minimal delay if something was written during the previous
+ * call to wng_post_select(). This is necessary because the filter
+ * chain might still have data for us which it couldn't convert during
+ * the previous run due to its buffer size constraints. In this case we
+ * do not want to wait until the next input data arrives as this could
+ * lead to buffer underruns.
+ */
+ if (g->last_written == 0)
+ return;
+ s->timeout.tv_sec = 0;
+ s->timeout.tv_usec = 1;