fix propagation of parameter changes from Plugin to PluginInsert so that automation will record parameter changes performed in a plugin GUI (#4976)

git-svn-id: svn://localhost/ardour2/branches/3.0@13026 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 17 insertions, 5 deletions

diff --git a/libs/ardour/audio_unit.cc b/libs/ardour/audio_unit.cc
index e02a00c28e..a76bcc4aae 100644
--- a/libs/ardour/audio_unit.cc
+++ b/libs/ardour/audio_unit.cc
@@ -2787,9 +2787,21 @@ AUPlugin::_parameter_change_listener (void* arg, void* src, const AudioUnitEvent
 void
 AUPlugin::parameter_change_listener (void* /*arg*/, void* /*src*/, const AudioUnitEvent* event, UInt64 /*host_time*/, Float32 new_value)
 {
-	ParameterMap::iterator i = parameter_map.find (event->mArgument.mParameter.mParameterID);
-
-	if (i != parameter_map.end()) {
-		ParameterChanged (i->second, new_value);
-	}
+        ParameterMap::iterator i;
+
+        switch (event->mEventType) {
+        case kAudioUnitEvent_BeginParameterChangeGesture:
+                break;
+        case kAudioUnitEvent_EndParameterChangeGesture:
+                break;
+        case kAudioUnitEvent_ParameterValueChange:
+                i = parameter_map.find (event->mArgument.mParameter.mParameterID);
+
+                if (i != parameter_map.end()) {
+                        ParameterChanged (i->second, new_value);
+                }
+                break;
+        default:
+                break;
+        }
 }