+/** Return at what position the latest underflow occurred, or -1 if this information is not
+ * known (e g if no underflow has occurred, or server is older than 1.0).
+ * Can be used inside the underflow callback to get information about the current underflow.
+ * (Only for playback streams) \since 1.0 */
+int64_t pa_stream_get_underflow_index(pa_stream *p);
+