Add jack_last_frame().

git-svn-id: svn+ssh://jackaudio.org/trunk/jack@730 0c269be4-1314-0410-8aa9-9f06e86f4224

configure.in

@@ -15,7 +15,7 @@ dnl                 changes are made
 dnl ---
 JACK_MAJOR_VERSION=0
 JACK_MINOR_VERSION=98
-JACK_MICRO_VERSION=4
+JACK_MICRO_VERSION=5
 
 dnl ---
 dnl HOWTO: updating the jack protocol version

jack/jack.h

@@ -671,6 +671,16 @@ jack_nframes_t jack_frames_since_cycle_start (const jack_client_t *);
  */
 jack_nframes_t jack_frame_time (const jack_client_t *);
 
+/**
+ * @return the frame_time after the last processing of the graph
+ * this is only to be used from the process callback. 
+ *
+ * This function can be used to put timestamps generated by 
+ * jack_frame_time() in correlation to the current process cycle.
+ */
+jack_nframes_t jack_last_frame_time (const jack_client_t *client);
+
+
 /**
  * @return the current CPU load estimated by JACK.  This is a running
  * average of the time it takes to execute a full process cycle for

libjack/transclient.c

@@ -61,6 +61,16 @@ jack_read_frame_time (const jack_client_t *client, jack_frame_timer_t *copy)
 	} while (copy->guard1 != copy->guard2);
 }
 
+
+jack_nframes_t
+jack_last_frame_time (const jack_client_t *client)
+{
+	jack_frame_timer_t current;
+	jack_read_frame_time (client, &current);
+	return current.frames;
+}
+
+
 /* copy a JACK transport position structure (thread-safe) */
 void
 jack_transport_copy_position (jack_position_t *from, jack_position_t *to)