fix from carl so that switching into write automation mode doesn't reset gain levels

git-svn-id: svn://localhost/ardour2/branches/2.0-ongoing@5299 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 5 insertions, 2 deletions

diff --git a/libs/ardour/io.cc b/libs/ardour/io.cc
index 7d9734d6d6..ad376628db 100644
--- a/libs/ardour/io.cc
+++ b/libs/ardour/io.cc
@@ -2584,8 +2584,11 @@ IO::set_gain_automation_state (AutoState state)
 			changed = true;
 			last_automation_snapshot = 0;
 			_gain_automation_curve.set_automation_state (state);
-			
-			if (state != Off) {
+
+			/* don't reset gain if we're moving to Off or Write mode;
+			   if we're moving to Write, the user may have manually set up gains
+			   that they don't want to lose */
+			if (state != Off && state != Write) {
 				set_gain (_gain_automation_curve.eval (_session.transport_frame()), this);
 			}
 		}