From 1d4494961b598055c94b8239e294c03c6ac1aaa8 Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Tue, 20 Oct 2015 11:31:18 -0400
Subject: add commentary

---
 gtk2_ardour/lv2_plugin_ui.cc | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'gtk2_ardour')

diff --git a/gtk2_ardour/lv2_plugin_ui.cc b/gtk2_ardour/lv2_plugin_ui.cc
index 33fa2c746d..153f4efdd9 100644
--- a/gtk2_ardour/lv2_plugin_ui.cc
+++ b/gtk2_ardour/lv2_plugin_ui.cc
@@ -183,7 +183,7 @@ LV2PluginUI::output_update()
 	if (!_inst) {
 		return;
 	}
-	
+
 	/* output ports (values set by DSP) need propagating to GUI */
 
 	uint32_t nports = _output_ports.size();
@@ -193,6 +193,10 @@ LV2PluginUI::output_update()
 		suil_instance_port_event ((SuilInstance*)_inst, index, 4, 0, &val);
 	}
 
+	/* Input ports marked for update because the control value changed
+	   since the last redisplay.
+	*/
+
 	for (Updates::iterator i = _updates.begin(); i != _updates.end(); ++i) {
 		float val = _lv2->get_parameter (*i);
 		/* push current value to the GUI */
-- 
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