- /* If non-NULL called whenever the the source this output is attached
- * to changes. Called from main context */
- void (*moved) (pa_source_output *o); /* may be NULL */
+ /* If non-NULL called whenever the source this output is attached
+ * to suspends or resumes. Called from IO context */
+ void (*suspend_within_thread) (pa_source_output *o, pa_bool_t b); /* may be NULL */
+
+ /* If non-NULL called whenever the source output is moved to a new
+ * source. Called from main context after the stream was detached
+ * from the old source and before it is attached to the new
+ * source. If dest is NULL the move was executed in two
+ * phases and the second one failed; the stream will be destroyed
+ * after this call. */
+ void (*moving) (pa_source_output *o, pa_source *dest); /* may be NULL */