X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=libs%2Fsurfaces%2Fmackie%2Ffader.cc;h=33e1e4c29faf34d8df107f56b57073c6c0d4da79;hb=548989fc75ba08912efe2bc48d24af5eb95c790d;hp=cc43bf3387e3062cda1690215f1e220d8a7dca47;hpb=4512d013eb7c658519abc8b5e82a1e7bf926cad6;p=ardour.git

diff --git a/libs/surfaces/mackie/fader.cc b/libs/surfaces/mackie/fader.cc
index cc43bf3387..33e1e4c29f 100644
--- a/libs/surfaces/mackie/fader.cc
+++ b/libs/surfaces/mackie/fader.cc
@@ -19,6 +19,10 @@
 
 #include <cmath>
 
+#include "pbd/compose.h"
+
+#include "ardour/debug.h"
+
 #include "fader.h"
 #include "surface.h"
 #include "control_group.h"
@@ -26,6 +30,7 @@
 
 using namespace ArdourSurface;
 using namespace Mackie;
+using namespace PBD;
 
 Control*
 Fader::factory (Surface& surface, int id, const char* name, Group& group)
@@ -54,6 +59,14 @@ Fader::update_message ()
 		return MidiByteArray();
 	}
 
-	int posi = lrintf (0x3fff * position);
+	int posi = lrintf (16384.0 * position);
+
+	if (posi == last_update_position) {
+		return MidiByteArray();
+	}
+
+	last_update_position = posi;
+
+	DEBUG_TRACE (DEBUG::MackieControl, string_compose ("generate fader message for position %1 (%2)\n", position, posi));
 	return MidiByteArray  (3, 0xe0 + id(), posi & 0x7f, posi >> 7);
 }