From 9ac351e60ceac28056d5513e3c346346689d11e0 Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Wed, 25 Jan 2012 15:30:02 +0000
Subject: fix #4405, by explicitly cancelling solo when a route's inputs drop
 to zero

git-svn-id: svn://localhost/ardour2/branches/3.0@11346 d708f5d6-7413-0410-9779-e7cbd77b26cf
---
 libs/ardour/ardour/route.h      |  1 +
 libs/ardour/ardour/session.h    |  2 ++
 libs/ardour/route.cc            | 19 +++++++++++++++++++
 libs/ardour/session_rtevents.cc | 20 ++++++++++++++++++++
 4 files changed, 42 insertions(+)

diff --git a/libs/ardour/ardour/route.h b/libs/ardour/ardour/route.h
index 1724439dc2..5c77627877 100644
--- a/libs/ardour/ardour/route.h
+++ b/libs/ardour/ardour/route.h
@@ -148,6 +148,7 @@ class Route : public SessionObject, public Automatable, public RouteGroupMember,
 
 	void set_solo (bool yn, void *src);
 	bool soloed () const { return self_soloed () || soloed_by_others (); }
+	void cancel_solo_after_disconnect ();
 
 	bool soloed_by_others () const { return _soloed_by_others_upstream||_soloed_by_others_downstream; }
 	bool soloed_by_others_upstream () const { return _soloed_by_others_upstream; }
diff --git a/libs/ardour/ardour/session.h b/libs/ardour/ardour/session.h
index 1df8ac6c49..885b5aae24 100644
--- a/libs/ardour/ardour/session.h
+++ b/libs/ardour/ardour/session.h
@@ -618,6 +618,7 @@ class Session : public PBD::StatefulDestructible, public PBD::ScopedConnectionLi
 
 	void set_solo (boost::shared_ptr<RouteList>, bool, SessionEvent::RTeventCallback after = rt_cleanup, bool group_override = false);
 	void set_just_one_solo (boost::shared_ptr<Route>, bool, SessionEvent::RTeventCallback after = rt_cleanup);
+	void cancel_solo_after_disconnect (boost::shared_ptr<Route>, SessionEvent::RTeventCallback after = rt_cleanup);
 	void set_mute (boost::shared_ptr<RouteList>, bool, SessionEvent::RTeventCallback after = rt_cleanup, bool group_override = false);
 	void set_listen (boost::shared_ptr<RouteList>, bool, SessionEvent::RTeventCallback after = rt_cleanup, bool group_override = false);
 	void set_record_enabled (boost::shared_ptr<RouteList>, bool, SessionEvent::RTeventCallback after = rt_cleanup, bool group_override = false);
@@ -1477,6 +1478,7 @@ class Session : public PBD::StatefulDestructible, public PBD::ScopedConnectionLi
 		return ev;
 	}
 
+	void rt_cancel_solo_after_disconnect (boost::shared_ptr<RouteList>, bool /* ignored */, bool /* ignored*/ );
 	void rt_set_solo (boost::shared_ptr<RouteList>, bool yn, bool group_override);
 	void rt_set_just_one_solo (boost::shared_ptr<RouteList>, bool yn, bool /* ignored*/ );
 	void rt_set_mute (boost::shared_ptr<RouteList>, bool yn, bool group_override);
diff --git a/libs/ardour/route.cc b/libs/ardour/route.cc
index 0f04a3743d..9233a77b14 100644
--- a/libs/ardour/route.cc
+++ b/libs/ardour/route.cc
@@ -2824,11 +2824,30 @@ Route::nonrealtime_handle_transport_stopped (bool /*abort_ignored*/, bool did_lo
 void
 Route::input_change_handler (IOChange change, void * /*src*/)
 {
+	bool need_to_queue_solo_change = true;
+
 	if ((change.type & IOChange::ConfigurationChanged)) {
+		need_to_queue_solo_change = false;
 		configure_processors (0);
 		_phase_invert.resize (_input->n_ports().n_audio ());
 		io_changed (); /* EMIT SIGNAL */
 	}
+
+	if (_fed_by.size() == 0 && _soloed_by_others_upstream) {
+		if (need_to_queue_solo_change) {
+			_session.cancel_solo_after_disconnect (shared_from_this());
+		} else {
+			cancel_solo_after_disconnect ();
+		}
+	}
+}
+
+void
+Route::cancel_solo_after_disconnect ()
+{
+	_soloed_by_others_upstream = 0;
+	set_mute_master_solo ();
+	solo_changed (false, this);
 }
 
 uint32_t
diff --git a/libs/ardour/session_rtevents.cc b/libs/ardour/session_rtevents.cc
index ca1ee319c7..43d291c458 100644
--- a/libs/ardour/session_rtevents.cc
+++ b/libs/ardour/session_rtevents.cc
@@ -71,6 +71,26 @@ Session::rt_set_solo (boost::shared_ptr<RouteList> rl, bool yn, bool /* group_ov
 	set_dirty();
 }
 
+void
+Session::cancel_solo_after_disconnect (boost::shared_ptr<Route> r, SessionEvent::RTeventCallback after)
+{
+	boost::shared_ptr<RouteList> rl (new RouteList);
+	rl->push_back (r);
+
+	queue_event (get_rt_event (rl, false, after, false, &Session::rt_cancel_solo_after_disconnect));
+}
+
+void
+Session::rt_cancel_solo_after_disconnect (boost::shared_ptr<RouteList> rl, bool /*yn */, bool /* group_override */)
+{
+	for (RouteList::iterator i = rl->begin(); i != rl->end(); ++i) {
+		if (!(*i)->is_hidden()) {
+			(*i)->cancel_solo_after_disconnect ();
+		}
+	}
+	/* no need to call set-dirty - the disconnect will already have done that */
+}
+
 void
 Session::set_just_one_solo (boost::shared_ptr<Route> r, bool yn, SessionEvent::RTeventCallback after)
 {
-- 
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