From d0a116b2ae1af29d16273be9ad6ec6e5fce95fbf Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Sat, 4 Apr 2020 01:23:58 +0200
Subject: [PATCH] Forward instrument MIDNAM changed signal

---
 libs/ardour/ardour/instrument_info.h |  4 ++++
 libs/ardour/instrument_info.cc       | 13 +++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/libs/ardour/ardour/instrument_info.h b/libs/ardour/ardour/instrument_info.h
index 9468831a85..0d3957fb68 100644
--- a/libs/ardour/ardour/instrument_info.h
+++ b/libs/ardour/ardour/instrument_info.h
@@ -86,6 +86,8 @@ private:
 		_plugin_mode = "";
 	}
 
+	void emit_changed ();
+
 	std::string _external_instrument_model;
 	std::string _external_instrument_mode;
 
@@ -93,6 +95,8 @@ private:
 	mutable std::string _plugin_mode;
 
 	boost::weak_ptr<ARDOUR::Processor> internal_instrument;
+
+	PBD::ScopedConnection _midnam_changed;
 };
 
 }
diff --git a/libs/ardour/instrument_info.cc b/libs/ardour/instrument_info.cc
index fcc7baf1cd..c00efeedbf 100644
--- a/libs/ardour/instrument_info.cc
+++ b/libs/ardour/instrument_info.cc
@@ -68,11 +68,24 @@ InstrumentInfo::set_internal_instrument (boost::shared_ptr<Processor> p)
 		//std::cerr << "InstrumentInfo::set_internal_instrument -- NO CHANGE\n";
 		return;
 	}
+	_midnam_changed.disconnect ();
 	//std::cerr << "InstrumentInfo::set_internal_instrument -> '" << (p ? p->name () : "(NULL)") << "'\n";
 	internal_instrument = p;
 	if (_external_instrument_model.empty () || _external_instrument_model == _("Unknown")) {
 		Changed (); /* EMIT SIGNAL */
 	}
+
+	boost::shared_ptr<PluginInsert> pi = boost::dynamic_pointer_cast<PluginInsert> (p);
+	if (pi && pi->plugin ()->has_midnam ()) {
+		pi->plugin()->UpdatedMidnam.connect_same_thread (_midnam_changed, boost::bind (&InstrumentInfo::emit_changed, this));
+	}
+}
+
+void
+InstrumentInfo::emit_changed () {
+	if (_external_instrument_model.empty ()) {
+		Changed ();
+	}
 }
 
 bool