X-Git-Url: https://git.carlh.net/gitweb/?a=blobdiff_plain;f=gtk2_ardour%2Flinux_vst_gui_support.cc;h=c54430c4e64ede4a06a3d06be674251f2afa8138;hb=7d3ef2318338b4dc6f836dbdba34f56627633a6d;hp=5eaf485c7569587ff45bce90c1d9d70828e33282;hpb=4ece16be8ea0b9862d05886eaecdf4108b345c53;p=ardour.git

diff --git a/gtk2_ardour/linux_vst_gui_support.cc b/gtk2_ardour/linux_vst_gui_support.cc
index 5eaf485c75..c54430c4e6 100644
--- a/gtk2_ardour/linux_vst_gui_support.cc
+++ b/gtk2_ardour/linux_vst_gui_support.cc
@@ -22,11 +22,10 @@
 /** VSTFX - An engine based on FST for handling linuxVST plugins **/
 /******************************************************************/
 
-/** EDITOR tab stops at 4 **/
-
 #include <stdlib.h>
 #include <stdio.h>
 #include <libgen.h>
+#include <assert.h>
 
 #include <pthread.h>
 #include <signal.h>
@@ -349,11 +348,18 @@ void* gui_event_loop (void* ptr)
 		/*Look at the XEvent queue - if there are any XEvents we need to handle them,
 		including passing them to all the plugin (eventProcs) we are currently managing*/
 		
+		bool may_sleep = true;
+
 		if(LXVST_XDisplay)
 		{
 			/*See if there are any events in the queue*/
 		
 			int num_events = XPending(LXVST_XDisplay);
+
+			if (num_events > 0) {
+				// keep dispatching events as fast as possible
+				may_sleep = false;
+			}
 			
 			/*process them if there are any*/
 		
@@ -465,6 +471,10 @@ again:
 
 			clock1 = g_get_monotonic_time();
 		}
+
+		if (may_sleep && elapsed_time_ms + 1 < LXVST_sched_timer_interval) {
+			Glib::usleep(1000 * (LXVST_sched_timer_interval - elapsed_time_ms - 1));
+		}
 	}
 
 	/*Drop out to here if we set gui_quit to 1 */
@@ -772,6 +782,10 @@ vstfx_event_loop_remove_plugin (VSTState* vstfx)
 		}
 	}
 
+	// if this function is called, there must be
+	// at least one plugin in the linked list
+	assert(vstfx_first);
+
 	if (vstfx_first == vstfx) {
 		vstfx_first = vstfx_first->next;
 	}