From 7cc2e8c969e7b778af90f3b45a4c3fa3cbc90ef6 Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Tue, 26 Jul 2016 04:17:10 +0200
Subject: [PATCH] add initial midi sidechain if plugin has one.

---
 libs/ardour/ardour/plugin_insert.h |  2 +-
 libs/ardour/plugin_insert.cc       | 13 ++++++++-----
 2 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/libs/ardour/ardour/plugin_insert.h b/libs/ardour/ardour/plugin_insert.h
index 564feb0c63..d38523a77d 100644
--- a/libs/ardour/ardour/plugin_insert.h
+++ b/libs/ardour/ardour/plugin_insert.h
@@ -156,7 +156,7 @@ class LIBARDOUR_API PluginInsert : public Processor
 	void set_strict_io  (bool b);
 	void set_custom_cfg (bool b);
 	bool set_preset_out (const ChanCount&);
-	bool add_sidechain  (uint32_t n_audio = 1);
+	bool add_sidechain  (uint32_t n_audio = 1, uint32_t n_midi = 0);
 	bool del_sidechain ();
 	void set_sidechain_latency (uint32_t, uint32_t);
 	boost::shared_ptr<SideChain> sidechain () const { return _sidechain; }
diff --git a/libs/ardour/plugin_insert.cc b/libs/ardour/plugin_insert.cc
index 7fb799d492..a7e512713d 100644
--- a/libs/ardour/plugin_insert.cc
+++ b/libs/ardour/plugin_insert.cc
@@ -85,8 +85,8 @@ PluginInsert::PluginInsert (Session& s, boost::shared_ptr<Plugin> plug)
 		add_plugin (plug);
 		create_automatable_parameters ();
 		const ChanCount& sc (sidechain_input_pins ());
-		if (sc.n_audio () > 0) {
-			add_sidechain (sc.n_audio ());
+		if (sc.n_audio () > 0 || sc.n_midi () > 0) {
+			add_sidechain (sc.n_audio (), sc.n_midi ());
 		}
 	}
 }
@@ -190,14 +190,14 @@ PluginInsert::set_preset_out (const ChanCount& c)
 }
 
 bool
-PluginInsert::add_sidechain (uint32_t n_audio)
+PluginInsert::add_sidechain (uint32_t n_audio, uint32_t n_midi)
 {
 	// caller must hold process lock
 	if (_sidechain) {
 		return false;
 	}
 	std::ostringstream n;
-	if (n_audio > 0) {
+	if (n_audio > 0 || n_midi > 0) {
 		n << "Sidechain " << Session::next_name_id ();
 	} else {
 		n << "TO BE RESET FROM XML";
@@ -206,7 +206,10 @@ PluginInsert::add_sidechain (uint32_t n_audio)
 	_sidechain = boost::shared_ptr<SideChain> (sc);
 	_sidechain->activate ();
 	for (uint32_t n = 0; n < n_audio; ++n) {
-		_sidechain->input()->add_port ("", owner()); // add a port, don't connect.
+		_sidechain->input()->add_port ("", owner(), DataType::AUDIO); // add a port, don't connect.
+	}
+	for (uint32_t n = 0; n < n_midi; ++n) {
+		_sidechain->input()->add_port ("", owner(), DataType::MIDI); // add a port, don't connect.
 	}
 	PluginConfigChanged (); /* EMIT SIGNAL */
 	return true;