merge (with conflict fixes) with master (even against rgareus' recommendation)

17 files changed, 229 insertions, 60 deletions

diff --git a/gtk2_ardour/ardour.menus.in b/gtk2_ardour/ardour.menus.in
index a354df603d..b6328963bb 100644
--- a/gtk2_ardour/ardour.menus.in
+++ b/gtk2_ardour/ardour.menus.in
@@ -551,6 +551,7 @@
     <menuitem action='newaux'/>
     <separator/>
     <menuitem action='controls'/>
+    <menuitem action='send_options'/>
     <separator/>
     <menuitem action='clear'/>
     <menuitem action='clear_pre'/>
diff --git a/gtk2_ardour/mixer_strip.cc b/gtk2_ardour/mixer_strip.cc
index 28c4e07452..80548ea20b 100644
--- a/gtk2_ardour/mixer_strip.cc
+++ b/gtk2_ardour/mixer_strip.cc
@@ -1041,29 +1041,13 @@ MixerStrip::update_panner_choices ()
 	ENSURE_GUI_THREAD (*this, &MixerStrip::update_panner_choices)
 	if (!_route->panner_shell()) { return; }
 
-	int in = _route->output()->n_ports().n_audio();
-	int out = in;
-
+	uint32_t in = _route->output()->n_ports().n_audio();
+	uint32_t out = in;
 	if (_route->panner()) {
 		in = _route->panner()->in().n_audio();
 	}
 
-	if (out < 2 || in == 0) {
-		panners.set_available_panners(_route, std::map<std::string,std::string>());
-		return;
-	}
-
-	std::map<std::string,std::string> panner_list;
-	std::list<PannerInfo*> panner_info = PannerManager::instance().panner_info;
-	/* get available panners for current configuration. */
-	for (list<PannerInfo*>::iterator p = panner_info.begin(); p != panner_info.end(); ++p) {
-		 PanPluginDescriptor* d = &(*p)->descriptor;
-		 if (d->in != -1 && d->in != in) continue;
-		 if (d->out != -1 && d->out != out) continue;
-		 if (d->in == -1 && d->out == -1 && out <= 2) continue;
-		 panner_list.insert(std::pair<std::string,std::string>(d->panner_uri,d->name));
-	}
-	panners.set_available_panners(_route, panner_list);
+	panners.set_available_panners(PannerManager::instance().PannerManager::get_available_panners(in, out));
 }
 
 /*
@@ -1891,10 +1875,13 @@ MixerStrip::show_send (boost::shared_ptr<Send> send)
 	gain_meter().set_controls (_route, send->meter(), send->amp());
 	gain_meter().setup_meters ();
 
+	uint32_t const in = _current_delivery->pans_required();
+	uint32_t const out = _current_delivery->pan_outs();
+
 	panner_ui().set_panner (_current_delivery->panner_shell(), _current_delivery->panner());
-	panner_ui().set_available_panners(boost::shared_ptr<ARDOUR::Route>(), std::map<std::string,std::string>());
+	panner_ui().set_available_panners(PannerManager::instance().PannerManager::get_available_panners(in, out));
 	panner_ui().setup_pan ();
-	panners.show_all ();
+	panner_ui().show_all ();
 
 	input_button.set_sensitive (false);
 	group_button.set_sensitive (false);
diff --git a/gtk2_ardour/panner2d.cc b/gtk2_ardour/panner2d.cc
index c3b87ba5e4..51c0112397 100644
--- a/gtk2_ardour/panner2d.cc
+++ b/gtk2_ardour/panner2d.cc
@@ -401,7 +401,7 @@ Panner2d::on_expose_event (GdkEventExpose *event)
 {
         CartesianVector c;
 	cairo_t* cr;
-        bool small_size = (height <= large_size_threshold);
+        bool small = (height <= large_size_threshold);
         const double diameter = radius*2.0;
 
 	cr = gdk_cairo_create (get_window()->gobj());
@@ -426,14 +426,14 @@ Panner2d::on_expose_event (GdkEventExpose *event)
 	/* horizontal line of "crosshairs" */
 
         cairo_set_source_rgba (cr, 0.282, 0.517, 0.662, 1.0);
-	cairo_move_to (cr, 0.0, rint(radius) - .5);
-	cairo_line_to (cr, diameter, rint(radius) - .5);
+	cairo_move_to (cr, 0.0, rint(radius) + .5);
+	cairo_line_to (cr, diameter, rint(radius) + .5);
 	cairo_stroke (cr);
 
 	/* vertical line of "crosshairs" */
 
-	cairo_move_to (cr, rint(radius) - .5, 0);
-	cairo_line_to (cr, rint(radius) - .5, diameter);
+	cairo_move_to (cr, rint(radius) + .5, 0);
+	cairo_line_to (cr, rint(radius) + .5, diameter);
 	cairo_stroke (cr);
 
 	/* the circle on which signals live */
@@ -484,7 +484,7 @@ Panner2d::on_expose_event (GdkEventExpose *event)
 
 		cairo_select_font_face (cr, "sans", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL);
 
-		if (small_size) {
+		if (small) {
 			arc_radius = 4.0;
 		} else {
 			cairo_set_font_size (cr, 10);
@@ -526,12 +526,12 @@ Panner2d::on_expose_event (GdkEventExpose *event)
                                         cairo_set_source_rgba (cr, 0.517, 0.772, 0.882, 0.8);
                                         cairo_stroke (cr);
 
-                                        if (!small_size && !signal->text.empty()) {
+                                        if (!small && !signal->text.empty()) {
                                                 cairo_set_source_rgba (cr, 0.517, 0.772, 0.882, .9);
                                                 /* the +/- adjustments are a hack to try to center the text in the circle
                                                  * TODO use pango get_pixel_size() -- see mono_panner.cc
                                                  */
-                                                if (small_size) {
+                                                if (small) {
                                                         cairo_move_to (cr, c.x - 1, c.y + 1);
                                                 } else {
                                                         cairo_move_to (cr, c.x - 4, c.y + 4);
@@ -565,7 +565,7 @@ Panner2d::on_expose_event (GdkEventExpose *event)
                                 cairo_move_to (cr, c.x, c.y);
                                 cairo_save (cr);
                                 cairo_rotate (cr, -(speaker->position.azi/360.0) * (2.0 * M_PI));
-                                if (small_size) {
+                                if (small) {
                                         cairo_scale (cr, 0.8, 0.8);
                                 } else {
                                         cairo_scale (cr, 1.2, 1.2);
@@ -583,7 +583,7 @@ Panner2d::on_expose_event (GdkEventExpose *event)
 				cairo_fill (cr);
                                 cairo_restore (cr);
 
-                                if (!small_size) {
+                                if (!small) {
                                         cairo_set_font_size (cr, 16);
 
                                         /* move the text in just a bit */
diff --git a/gtk2_ardour/panner_ui.cc b/gtk2_ardour/panner_ui.cc
index af297a8507..0c57fab244 100644
--- a/gtk2_ardour/panner_ui.cc
+++ b/gtk2_ardour/panner_ui.cc
@@ -388,7 +388,7 @@ PannerUI::build_pan_menu ()
 		items.push_back (MenuElem (_("Edit..."), sigc::mem_fun (*this, &PannerUI::pan_edit)));
 	}
 
-	if (_route && _panner_list.size() > 1 && !_panshell->bypassed()) {
+	if (_panner_list.size() > 1 && !_panshell->bypassed()) {
 		RadioMenuItem::Group group;
 		items.push_back (SeparatorElem());
 
@@ -444,9 +444,7 @@ PannerUI::pan_reset ()
 void
 PannerUI::pan_set_custom_type (std::string uri) {
 	if (_suspend_menu_callbacks) return;
-	if (_route) {
-		_route->set_custom_panner_uri(uri);
-	}
+	_panshell->select_panner_by_uri(uri);
 }
 
 void
@@ -644,8 +642,7 @@ PannerUI::position_adjusted ()
 }
 
 void
-PannerUI::set_available_panners(boost::shared_ptr<ARDOUR::Route> r, std::map<std::string,std::string> p)
+PannerUI::set_available_panners(std::map<std::string,std::string> p)
 {
-	_route = r;
 	_panner_list = p;
 }
diff --git a/gtk2_ardour/panner_ui.h b/gtk2_ardour/panner_ui.h
index dca24451d1..9b349d664f 100644
--- a/gtk2_ardour/panner_ui.h
+++ b/gtk2_ardour/panner_ui.h
@@ -73,7 +73,7 @@ class PannerUI : public Gtk::HBox, public ARDOUR::SessionHandlePtr
 
 	void set_width (Width);
 	void setup_pan ();
-	void set_available_panners(boost::shared_ptr<ARDOUR::Route>, std::map<std::string,std::string>);
+	void set_available_panners(std::map<std::string,std::string>);
 
 	void effective_pan_display ();
 
@@ -85,6 +85,7 @@ class PannerUI : public Gtk::HBox, public ARDOUR::SessionHandlePtr
 
   private:
 	friend class MixerStrip;
+	friend class SendUI;
 
 	boost::shared_ptr<ARDOUR::PannerShell> _panshell;
 	boost::shared_ptr<ARDOUR::Panner> _panner;
@@ -161,7 +162,6 @@ class PannerUI : public Gtk::HBox, public ARDOUR::SessionHandlePtr
         void start_touch (boost::weak_ptr<ARDOUR::AutomationControl>);
         void stop_touch (boost::weak_ptr<ARDOUR::AutomationControl>);
 
-	boost::shared_ptr<ARDOUR::Route> _route;
 	std::map<std::string,std::string> _panner_list;
 	bool _suspend_menu_callbacks;
 };
diff --git a/gtk2_ardour/processor_box.cc b/gtk2_ardour/processor_box.cc
index 1e2289d790..05a373e9d8 100644
--- a/gtk2_ardour/processor_box.cc
+++ b/gtk2_ardour/processor_box.cc
@@ -45,6 +45,7 @@
 #include "ardour/audioengine.h"
 #include "ardour/internal_return.h"
 #include "ardour/internal_send.h"
+#include "ardour/panner_shell.h"
 #include "ardour/plugin_insert.h"
 #include "ardour/pannable.h"
 #include "ardour/port_insert.h"
@@ -456,6 +457,34 @@ ProcessorEntry::toggle_control_visibility (Control* c)
 	_parent->update_gui_object_state (this);
 }
 
+Menu *
+ProcessorEntry::build_send_options_menu ()
+{
+	using namespace Menu_Helpers;
+	Menu* menu = manage (new Menu);
+	MenuList& items = menu->items ();
+
+	boost::shared_ptr<Send> send = boost::dynamic_pointer_cast<Send> (_processor);
+	if (send) {
+
+		items.push_back (CheckMenuElem (_("Link panner controls")));
+		CheckMenuItem* c = dynamic_cast<CheckMenuItem*> (&items.back ());
+		c->set_active (send->panner_shell()->is_linked_to_route());
+		c->signal_toggled().connect (sigc::mem_fun (*this, &ProcessorEntry::toggle_panner_link));
+
+	}
+	return menu;
+}
+
+void
+ProcessorEntry::toggle_panner_link ()
+{
+	boost::shared_ptr<Send> send = boost::dynamic_pointer_cast<Send> (_processor);
+	if (send) {
+		send->panner_shell()->set_linked_to_route(!send->panner_shell()->is_linked_to_route());
+	}
+}
+
 ProcessorEntry::Control::Control (boost::shared_ptr<AutomationControl> c, string const & n)
 	: _control (c)
 	, _adjustment (gain_to_slider_position_with_max (1.0, Config->get_max_gain()), 0, 1, 0.01, 0.1)
@@ -1092,6 +1121,20 @@ ProcessorBox::show_processor_menu (int arg)
 		}
 	}
 
+	Gtk::MenuItem* send_menu_item = dynamic_cast<Gtk::MenuItem*>(ActionManager::get_widget("/ProcessorMenu/send_options"));
+	if (send_menu_item) {
+		if (single_selection) {
+			Menu* m = single_selection->build_send_options_menu ();
+			if (m && !m->items().empty()) {
+				send_menu_item->set_submenu (*m);
+				send_menu_item->set_sensitive (true);
+			} else {
+				gtk_menu_item_set_submenu (send_menu_item->gobj(), 0);
+				send_menu_item->set_sensitive (false);
+			}
+		}
+	}
+
 	/* Sensitise actions as approprioate */
 
         cut_action->set_sensitive (can_cut());
@@ -2071,7 +2114,8 @@ ProcessorBox::paste_processor_state (const XMLNodeList& nlist, boost::shared_ptr
 
 				boost::shared_ptr<Pannable> sendpan(new Pannable (*_session));
 				XMLNode n (**niter);
-				Send* s = new Send (*_session, sendpan, _route->mute_master());
+
+				Send* s = new Send (*_session, _route->pannable(), _route->mute_master());
 
 				IOProcessor::prepare_for_reset (n, s->name());
 				
@@ -2404,6 +2448,7 @@ ProcessorBox::register_actions ()
 	ActionManager::register_action (popup_act_grp, X_("newaux"), _("New Aux Send ..."));
 
 	ActionManager::register_action (popup_act_grp, X_("controls"), _("Controls"));
+	ActionManager::register_action (popup_act_grp, X_("send_options"), _("Send Options"));
 
 	ActionManager::register_action (popup_act_grp, X_("clear"), _("Clear (all)"),
 			sigc::ptr_fun (ProcessorBox::rb_clear));
diff --git a/gtk2_ardour/processor_box.h b/gtk2_ardour/processor_box.h
index a66a6c4a56..021e557d36 100644
--- a/gtk2_ardour/processor_box.h
+++ b/gtk2_ardour/processor_box.h
@@ -138,6 +138,7 @@ public:
 	void set_control_state (XMLNode const *);
 	std::string state_id () const;
 	Gtk::Menu* build_controls_menu ();
+	Gtk::Menu* build_send_options_menu ();
 
 protected:
 	ArdourButton _button;
@@ -205,6 +206,7 @@ private:
 	std::list<Control*> _controls;
 
 	void toggle_control_visibility (Control *);
+	void toggle_panner_link ();
 
 	class PortIcon : public Gtk::DrawingArea {
 	public:
diff --git a/gtk2_ardour/rc_option_editor.cc b/gtk2_ardour/rc_option_editor.cc
index 7c5d9a7763..1286fd8cc9 100644
--- a/gtk2_ardour/rc_option_editor.cc
+++ b/gtk2_ardour/rc_option_editor.cc
@@ -1637,6 +1637,8 @@ RCOptionEditor::RCOptionEditor ()
 
 	/* SOLO AND MUTE */
 
+	add_option (_("Solo / mute"), new OptionEditorHeading (_("Solo")));
+
 	add_option (_("Solo / mute"),
 	     new FaderOption (
 		     "solo-mute-gain",
@@ -1750,6 +1752,16 @@ RCOptionEditor::RCOptionEditor ()
 		     sigc::mem_fun (*_rc_config, &RCConfiguration::set_mute_affects_main_outs)
 		     ));
 
+	add_option (_("Solo / mute"), new OptionEditorHeading (_("Send Routing")));
+
+	add_option (_("Solo / mute"),
+	     new BoolOption (
+		     "link-send-and-route-panner",
+		     _("Link panners of Aux and External Sends with main panner by default"),
+		     sigc::mem_fun (*_rc_config, &RCConfiguration::get_link_send_and_route_panner),
+		     sigc::mem_fun (*_rc_config, &RCConfiguration::set_link_send_and_route_panner)
+		     ));
+
 	add_option (_("MIDI"),
 		    new BoolOption (
 			    "send-midi-clock",
diff --git a/gtk2_ardour/send_ui.cc b/gtk2_ardour/send_ui.cc
index 019307fd16..7e3b0e775a 100644
--- a/gtk2_ardour/send_ui.cc
+++ b/gtk2_ardour/send_ui.cc
@@ -20,6 +20,7 @@
 #include <gtkmm2ext/doi.h>
 
 #include "ardour/io.h"
+#include "ardour/panner_manager.h"
 #include "ardour/send.h"
 #include "ardour/rc_configuration.h"
 
@@ -70,7 +71,11 @@ SendUI::SendUI (Gtk::Window* parent, boost::shared_ptr<Send> s, Session* session
 
 	_send->output()->changed.connect (connections, invalidator (*this), boost::bind (&SendUI::outs_changed, this, _1, _2), gui_context());
 
+	uint32_t const in = _send->pans_required();
+	uint32_t const out = _send->pan_outs();
+
 	_panners.set_width (Wide);
+	_panners.set_available_panners(PannerManager::instance().PannerManager::get_available_panners(in, out));
 	_panners.setup_pan ();
 
 	_gpm.setup_meters ();
@@ -97,7 +102,14 @@ SendUI::outs_changed (IOChange change, void* /*ignored*/)
 {
 	ENSURE_GUI_THREAD (*this, &SendUI::outs_changed, change, ignored)
 	if (change.type & IOChange::ConfigurationChanged) {
+		uint32_t const in = _send->pans_required();
+		uint32_t const out = _send->pan_outs();
+		if (_panners._panner == 0) {
+			_panners.set_panner (_send->panner_shell(), _send->panner());
+		}
+		_panners.set_available_panners(PannerManager::instance().PannerManager::get_available_panners(in, out));
 		_panners.setup_pan ();
+		_panners.show_all ();
 		_gpm.setup_meters ();
 	}
 }
diff --git a/libs/ardour/ardour/panner_manager.h b/libs/ardour/ardour/panner_manager.h
index 80f8e8010a..73d667424f 100644
--- a/libs/ardour/ardour/panner_manager.h
+++ b/libs/ardour/ardour/panner_manager.h
@@ -20,6 +20,8 @@
 #ifndef __ardour_panner_manager_h__
 #define __ardour_panner_manager_h__
 
+#include <map>
+#include <string>
 #include <glibmm/module.h>
 
 #include "ardour/panner.h"
@@ -27,7 +29,10 @@
 
 namespace ARDOUR {
 
+typedef std::map<std::string,std::string> PannerUriMap;
+
 struct LIBARDOUR_API PannerInfo {
+
 	PanPluginDescriptor descriptor;
 	Glib::Module* module;
 
@@ -51,7 +56,8 @@ public:
 	std::list<PannerInfo*> panner_info;
 
 	PannerInfo* select_panner (ChanCount in, ChanCount out, std::string const uri = "");
-	PannerInfo* get_by_uri (std::string uri);
+	PannerInfo* get_by_uri (std::string uri) const;
+	PannerUriMap get_available_panners(uint32_t const a_in, uint32_t const a_out) const;
 
 private:
 	PannerManager();
diff --git a/libs/ardour/ardour/panner_shell.h b/libs/ardour/ardour/panner_shell.h
index 76df20489f..02f80c7b28 100644
--- a/libs/ardour/ardour/panner_shell.h
+++ b/libs/ardour/ardour/panner_shell.h
@@ -50,7 +50,7 @@ class Pannable;
 class LIBARDOUR_API PannerShell : public SessionObject
 {
 public:
-	PannerShell (std::string name, Session&, boost::shared_ptr<Pannable>);
+	PannerShell (std::string name, Session&, boost::shared_ptr<Pannable>, bool is_send = false);
 	virtual ~PannerShell ();
 
 	std::string describe_parameter (Evoral::Parameter param);
@@ -64,25 +64,38 @@ public:
 	XMLNode& get_state ();
 	int      set_state (const XMLNode&, int version);
 
+	PBD::Signal0<void> PannableChanged; /* Pannable changed -- l*/
 	PBD::Signal0<void> Changed; /* panner and/or outputs count and/or bypass state changed */
 
 	boost::shared_ptr<Panner> panner() const { return _panner; }
-	boost::shared_ptr<Pannable> pannable() const { return _pannable; }
+	boost::shared_ptr<Pannable> pannable() const { return _panlinked ? _pannable_route : _pannable_internal; }
 
 	bool bypassed () const;
 	void set_bypassed (bool);
 
+	bool is_send () const { return (_is_send); }
+	bool is_linked_to_route () const { return (_is_send && _panlinked); }
+	/* this function takes the process lock: */
+	void set_linked_to_route (bool);
+
 	std::string current_panner_uri() const { return _current_panner_uri; }
 	std::string user_selected_panner_uri() const { return _user_selected_panner_uri; }
 	std::string panner_gui_uri() const { return _panner_gui_uri; }
 
+	/* this function takes the process lock: */
+	bool select_panner_by_uri (std::string const uri);
+
   private:
 	friend class Route;
 	void distribute_no_automation (BufferSet& src, BufferSet& dest, pframes_t nframes, gain_t gain_coeff);
 	bool set_user_selected_panner_uri (std::string const uri);
 
 	boost::shared_ptr<Panner> _panner;
-	boost::shared_ptr<Pannable> _pannable;
+
+	boost::shared_ptr<Pannable> _pannable_internal;
+	boost::shared_ptr<Pannable> _pannable_route;
+	bool _is_send;
+	bool _panlinked;
 	bool _bypassed;
 
 	std::string _current_panner_uri;
diff --git a/libs/ardour/ardour/rc_configuration_vars.h b/libs/ardour/ardour/rc_configuration_vars.h
index 23973f6a1a..adae854ca7 100644
--- a/libs/ardour/ardour/rc_configuration_vars.h
+++ b/libs/ardour/ardour/rc_configuration_vars.h
@@ -113,6 +113,8 @@ CONFIG_VARIABLE (gain_t, solo_mute_gain, "solo-mute-gain", 0.0)
 CONFIG_VARIABLE (std::string, monitor_bus_preferred_bundle, "monitor-bus-preferred-bundle", "")
 CONFIG_VARIABLE (bool, quieten_at_speed, "quieten-at-speed", true)
 
+CONFIG_VARIABLE (bool, link_send_and_route_panner, "link-send-and-route-panner", true)
+
 /* click */
 
 CONFIG_VARIABLE (bool, clicking, "clicking", false)
diff --git a/libs/ardour/delivery.cc b/libs/ardour/delivery.cc
index 11500b4b10..b4b9831d97 100644
--- a/libs/ardour/delivery.cc
+++ b/libs/ardour/delivery.cc
@@ -58,7 +58,9 @@ Delivery::Delivery (Session& s, boost::shared_ptr<IO> io, boost::shared_ptr<Pann
 	, _no_panner_reset (false)
 {
 	if (pannable) {
-		_panshell = boost::shared_ptr<PannerShell>(new PannerShell (_name, _session, pannable));
+		bool is_send = false;
+		if (r & (Delivery::Send|Delivery::Aux)) is_send = true;
+		_panshell = boost::shared_ptr<PannerShell>(new PannerShell (_name, _session, pannable, is_send));
 	}
 
 	_display_to_user = false;
@@ -80,7 +82,9 @@ Delivery::Delivery (Session& s, boost::shared_ptr<Pannable> pannable, boost::sha
 	, _no_panner_reset (false)
 {
 	if (pannable) {
-		_panshell = boost::shared_ptr<PannerShell>(new PannerShell (_name, _session, pannable));
+		bool is_send = false;
+		if (r & (Delivery::Send|Delivery::Aux)) is_send = true;
+		_panshell = boost::shared_ptr<PannerShell>(new PannerShell (_name, _session, pannable, is_send));
 	}
 
 	_display_to_user = false;
@@ -364,6 +368,7 @@ Delivery::set_state (const XMLNode& node, int version)
 	XMLNode* pannnode = node.child (X_("Pannable"));
 	if (_panshell && _panshell->panner() && pannnode) {
 		_panshell->pannable()->set_state (*pannnode, version);
+		_panshell->pannable()->set_panner(_panshell->panner());
 	}
 
 	return 0;
diff --git a/libs/ardour/panner_manager.cc b/libs/ardour/panner_manager.cc
index 3c9623f3e6..0084a62285 100644
--- a/libs/ardour/panner_manager.cc
+++ b/libs/ardour/panner_manager.cc
@@ -222,13 +222,35 @@ PannerManager::select_panner (ChanCount in, ChanCount out, std::string const uri
 }
 
 PannerInfo*
-PannerManager::get_by_uri (std::string uri)
+PannerManager::get_by_uri (std::string uri) const
 {
 	PannerInfo* pi = NULL;
-	for (list<PannerInfo*>::iterator p = panner_info.begin(); p != panner_info.end(); ++p) {
+	for (list<PannerInfo*>::const_iterator p = panner_info.begin(); p != panner_info.end(); ++p) {
 		if ((*p)->descriptor.panner_uri != uri) continue;
 		pi = (*p);
 		break;
 	}
 	return pi;
 }
+
+PannerUriMap
+PannerManager::get_available_panners(uint32_t const a_in, uint32_t const a_out) const
+{
+	int const in = a_in;
+	int const out = a_out;
+	PannerUriMap panner_list;
+
+	if (out < 2 || in == 0) {
+		return panner_list;
+	}
+
+	/* get available panners for current configuration. */
+	for (list<PannerInfo*>::const_iterator p = panner_info.begin(); p != panner_info.end(); ++p) {
+		 PanPluginDescriptor* d = &(*p)->descriptor;
+		 if (d->in != -1 && d->in != in) continue;
+		 if (d->out != -1 && d->out != out) continue;
+		 if (d->in == -1 && d->out == -1 && out <= 2) continue;
+		 panner_list.insert(std::pair<std::string,std::string>(d->panner_uri,d->name));
+	}
+	return panner_list;
+}
diff --git a/libs/ardour/panner_shell.cc b/libs/ardour/panner_shell.cc
index a25cb49ab5..b489354e21 100644
--- a/libs/ardour/panner_shell.cc
+++ b/libs/ardour/panner_shell.cc
@@ -43,8 +43,10 @@
 #include "evoral/Curve.hpp"
 
 #include "ardour/audio_buffer.h"
+#include "ardour/audioengine.h"
 #include "ardour/buffer_set.h"
 #include "ardour/debug.h"
+#include "ardour/pannable.h"
 #include "ardour/panner.h"
 #include "ardour/panner_manager.h"
 #include "ardour/panner_shell.h"
@@ -59,21 +61,31 @@ using namespace std;
 using namespace ARDOUR;
 using namespace PBD;
 
-PannerShell::PannerShell (string name, Session& s, boost::shared_ptr<Pannable> p)
+PannerShell::PannerShell (string name, Session& s, boost::shared_ptr<Pannable> p, bool is_send)
 	: SessionObject (s, name)
-	, _pannable (p)
+	, _pannable_route (p)
+	, _is_send (is_send)
+	, _panlinked (true)
 	, _bypassed (false)
 	, _current_panner_uri("")
 	, _user_selected_panner_uri("")
 	, _panner_gui_uri("")
 	, _force_reselect (false)
 {
+	if (is_send) {
+		_pannable_internal.reset(new Pannable (s));
+		if (Config->get_link_send_and_route_panner()) {
+			_panlinked = true;
+		} else {
+			_panlinked = false;
+		}
+	}
 	set_name (name);
 }
 
 PannerShell::~PannerShell ()
 {
-	DEBUG_TRACE(DEBUG::Destruction, string_compose ("panner shell %3 for %1 destructor, panner is %4, pannable is %2\n", _name, _pannable, this, _panner));
+	DEBUG_TRACE(DEBUG::Destruction, string_compose ("panner shell %3 for %1 destructor, panner is %4, pannable is %2\n", _name, _pannable_route, this, _panner));
 }
 
 void
@@ -120,7 +132,8 @@ PannerShell::configure_io (ChanCount in, ChanCount out)
 		speakers.reset (s);
 	}
 
-	Panner* p = pi->descriptor.factory (_pannable, speakers);
+	/* TODO  don't allow to link  _is_send if internal & route panners are different types */
+	Panner* p = pi->descriptor.factory (pannable(), speakers);
 	// boost_debug_shared_ptr_mark_interesting (p, "Panner");
 	_panner.reset (p);
 	_panner->configure_io (in, out);
@@ -137,8 +150,9 @@ PannerShell::get_state ()
 
 	node->add_property (X_("bypassed"), _bypassed ? X_("yes") : X_("no"));
 	node->add_property (X_("user-panner"), _user_selected_panner_uri);
+	node->add_property (X_("linked-to-route"), _panlinked ? X_("yes") : X_("no"));
 
-	if (_panner) {
+	if (_panner && _is_send) {
 		node->add_child_nocopy (_panner->get_state ());
 	}
 
@@ -157,6 +171,10 @@ PannerShell::set_state (const XMLNode& node, int version)
 		set_bypassed (string_is_affirmative (prop->value ()));
 	}
 
+	if ((prop = node.property (X_("linked-to-route"))) != 0) {
+		_panlinked = string_is_affirmative (prop->value ());
+	}
+
 	if ((prop = node.property (X_("user-panner"))) != 0) {
 		_user_selected_panner_uri = prop->value ();
 	}
@@ -170,7 +188,8 @@ PannerShell::set_state (const XMLNode& node, int version)
 			if ((prop = (*niter)->property (X_("uri")))) {
 				PannerInfo* p = PannerManager::instance().get_by_uri(prop->value());
 				if (p) {
-					_panner.reset (p->descriptor.factory (_pannable, _session.get_speakers ()));
+					_panner.reset (p->descriptor.factory (
+								_is_send ? _pannable_internal : _pannable_route, _session.get_speakers ()));
 					_current_panner_uri = p->descriptor.panner_uri;
 					_panner_gui_uri = p->descriptor.gui_uri;
 					if (_panner->set_state (**niter, version) == 0) {
@@ -193,7 +212,8 @@ PannerShell::set_state (const XMLNode& node, int version)
 						   assumption, but it's still an assumption.
 						*/
 
-						_panner.reset ((*p)->descriptor.factory (_pannable, _session.get_speakers ()));
+						_panner.reset ((*p)->descriptor.factory (
+									_is_send ? _pannable_internal : _pannable_route, _session.get_speakers ()));
 						_current_panner_uri = (*p)->descriptor.panner_uri;
 						_panner_gui_uri = (*p)->descriptor.gui_uri;
 
@@ -393,3 +413,41 @@ PannerShell::set_user_selected_panner_uri (std::string const uri)
 	_force_reselect = true;
 	return true;
 }
+
+bool
+PannerShell::select_panner_by_uri (std::string const uri)
+{
+	if (uri == _user_selected_panner_uri) return false;
+	_user_selected_panner_uri = uri;
+	if (uri == _current_panner_uri) return false;
+	_force_reselect = true;
+	if (_panner) {
+		Glib::Threads::Mutex::Lock lx (AudioEngine::instance()->process_lock ());
+			ChanCount in = _panner->in();
+			ChanCount out = _panner->out();
+			configure_io(in, out);
+			pannable()->set_panner(_panner);
+			_session.set_dirty ();
+	}
+	return true;
+}
+
+void
+PannerShell::set_linked_to_route (bool onoff)
+{
+	if (!_is_send || onoff == _panlinked) {
+		return;
+	}
+	_panlinked = onoff;
+
+	_force_reselect = true;
+	if (_panner) {
+		Glib::Threads::Mutex::Lock lx (AudioEngine::instance()->process_lock ());
+			ChanCount in = _panner->in();
+			ChanCount out = _panner->out();
+			configure_io(in, out);
+			pannable()->set_panner(_panner);
+			_session.set_dirty ();
+	}
+	PannableChanged();
+}
diff --git a/libs/ardour/route.cc b/libs/ardour/route.cc
index 1b40df24dd..6279dbacf6 100644
--- a/libs/ardour/route.cc
+++ b/libs/ardour/route.cc
@@ -1568,6 +1568,10 @@ Route::remove_processors (const ProcessorList& to_be_deleted, ProcessorStreams*
 	return 0;
 }
 
+#if 0
+/* currently unused (again) -- but will come in handy soon (again)
+ * once there is an option to link route + delivery panner settings
+ */
 void
 Route::set_custom_panner_uri (std::string const panner_uri)
 {
@@ -1619,6 +1623,7 @@ Route::set_custom_panner_uri (std::string const panner_uri)
 	processors_changed (RouteProcessorChange ()); /* EMIT SIGNAL */
 	_session.set_dirty ();
 }
+#endif
 
 void
 Route::reset_instrument_info ()
@@ -2553,8 +2558,7 @@ Route::set_processor_state (const XMLNode& node)
 
 				if (prop->value() == "intsend") {
 
-					boost::shared_ptr<Pannable> sendpan (new Pannable (_session));
-					processor.reset (new InternalSend (_session, sendpan, _mute_master, boost::shared_ptr<Route>(), Delivery::Role (0)));
+					processor.reset (new InternalSend (_session, _pannable, _mute_master, boost::shared_ptr<Route>(), Delivery::Aux));
 
 				} else if (prop->value() == "ladspa" || prop->value() == "Ladspa" ||
 				           prop->value() == "lv2" ||
@@ -2570,8 +2574,7 @@ Route::set_processor_state (const XMLNode& node)
 
 				} else if (prop->value() == "send") {
 
-					boost::shared_ptr<Pannable> sendpan (new Pannable (_session));
-					processor.reset (new Send (_session, sendpan, _mute_master));
+					processor.reset (new Send (_session, _pannable, _mute_master));
 
 				} else {
 					error << string_compose(_("unknown Processor type \"%1\"; ignored"), prop->value()) << endmsg;
diff --git a/libs/panners/vbap/vbap.cc b/libs/panners/vbap/vbap.cc
index 23683fde08..0de8d3a29a 100644
--- a/libs/panners/vbap/vbap.cc
+++ b/libs/panners/vbap/vbap.cc
@@ -477,7 +477,11 @@ void
 VBAPanner::reset ()
 {
 	set_position (0);
-	set_width (1);
+        if (_signals.size() > 1) {
+                set_width (1.0 - (1.0 / (double)_signals.size()));
+        } else {
+                set_width (0);
+        }
 	set_elevation (0);
 
 	update ();