From d26d8c91a027751c5c77cae76d0e04a82b50deb7 Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Fri, 23 Apr 2021 17:38:16 -0600
Subject: [PATCH] fix per-processor latency to reflect transport direction

---
 libs/ardour/route.cc | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/libs/ardour/route.cc b/libs/ardour/route.cc
index c82ddaf428..1df017fcad 100644
--- a/libs/ardour/route.cc
+++ b/libs/ardour/route.cc
@@ -525,7 +525,11 @@ Route::process_output_buffers (BufferSet& bufs,
 		 */
 
 		if ((*i)->active ()) {
-			latency += (*i)->effective_latency ();
+			if (speed < 0) {
+				latency -= (*i)->effective_latency ();
+			} else {
+				latency += (*i)->effective_latency ();
+			}
 		}
 
 		if (speed < 0) {