globally remove all trailing whitespace from ardour code base.
[ardour.git] / libs / surfaces / mackie / strip.cc
index cbb0a9d6ca7622d15280d5744fc403ca35f44db2..ca5c79e9e012ce1757124324a51b309f2e482edb 100644 (file)
@@ -23,6 +23,8 @@
 
 #include <sys/time.h>
 
+#include <glibmm/convert.h>
+
 #include "midi++/port.h"
 
 #include "pbd/compose.h"
 #include "jog.h"
 #include "meter.h"
 
-using namespace Mackie;
 using namespace std;
 using namespace ARDOUR;
 using namespace PBD;
+using namespace ArdourSurface;
+using namespace Mackie;
 
-#define ui_context() MackieControlProtocol::instance() /* a UICallback-derived object that specifies the event loop for signal handling */
-#define ui_bind(f, ...) boost::protect (boost::bind (f, __VA_ARGS__))
+#ifndef timeradd /// only avail with __USE_BSD
+#define timeradd(a,b,result)                         \
+  do {                                               \
+    (result)->tv_sec = (a)->tv_sec + (b)->tv_sec;    \
+    (result)->tv_usec = (a)->tv_usec + (b)->tv_usec; \
+    if ((result)->tv_usec >= 1000000)                \
+    {                                                \
+      ++(result)->tv_sec;                            \
+      (result)->tv_usec -= 1000000;                  \
+    }                                                \
+  } while (0)
+#endif
 
-extern PBD::EventLoop::InvalidationRecord* __invalidator (sigc::trackable& trackable, const char*, int);
-#define invalidator() __invalidator (*(MackieControlProtocol::instance()), __FILE__, __LINE__)
+#define ui_context() MackieControlProtocol::instance() /* a UICallback-derived object that specifies the event loop for signal handling */
 
 Strip::Strip (Surface& s, const std::string& name, int index, const map<Button::ID,StripButtonInfo>& strip_buttons)
        : Group (name)
@@ -73,22 +85,31 @@ Strip::Strip (Surface& s, const std::string& name, int index, const map<Button::
        , _vselect (0)
        , _fader_touch (0)
        , _vpot (0)
-       , _vpot_mode (PanAzimuth)
-       , _preflip_vpot_mode (PanAzimuth)
        , _fader (0)
+       , _meter (0)
        , _index (index)
        , _surface (&s)
        , _controls_locked (false)
+       , _transport_is_rolling (false)
+       , _metering_active (true)
        , _reset_display_at (0)
        , _last_gain_position_written (-1.0)
-       , _last_pan_position_written (-1.0)
+       , _last_pan_azi_position_written (-1.0)
+       , _last_pan_width_position_written (-1.0)
+       , redisplay_requests (256)
 {
        _fader = dynamic_cast<Fader*> (Fader::factory (*_surface, index, "fader", *this));
        _vpot = dynamic_cast<Pot*> (Pot::factory (*_surface, Pot::ID + index, "vpot", *this));
-       _meter = dynamic_cast<Meter*> (Meter::factory (*_surface, index, "meter", *this));
+
+       if (s.mcp().device_info().has_meters()) {
+               _meter = dynamic_cast<Meter*> (Meter::factory (*_surface, index, "meter", *this));
+       }
 
        for (map<Button::ID,StripButtonInfo>::const_iterator b = strip_buttons.begin(); b != strip_buttons.end(); ++b) {
-               (void) Button::factory (*_surface, b->first, b->second.base_id + index, b->second.name, *this);
+               Button* bb = dynamic_cast<Button*> (Button::factory (*_surface, b->first, b->second.base_id + index, b->second.name, *this));
+               DEBUG_TRACE (DEBUG::MackieControl, string_compose ("surface %1 strip %2 new button BID %3 id %4 from base %5\n",
+                                                                  _surface->number(), index, Button::id_to_name (bb->bid()),
+                                                                  bb->id(), b->second.base_id));
        }
 }      
 
@@ -97,7 +118,7 @@ Strip::~Strip ()
        /* surface is responsible for deleting all controls */
 }
 
-void 
+void
 Strip::add (Control & control)
 {
        Button* button;
@@ -125,6 +146,7 @@ Strip::add (Control & control)
                        break;
                case Button::FaderTouch:
                        _fader_touch = button;
+                       break;
                default:
                        break;
                }
@@ -132,7 +154,7 @@ Strip::add (Control & control)
 }
 
 void
-Strip::set_route (boost::shared_ptr<Route> r)
+Strip::set_route (boost::shared_ptr<Route> r, bool /*with_messages*/)
 {
        if (_controls_locked) {
                return;
@@ -149,7 +171,11 @@ Strip::set_route (boost::shared_ptr<Route> r)
 
        _route = r;
 
+       control_by_parameter.clear ();
+       reset_saved_values ();
+
        if (!r) {
+               zero ();
                return;
        }
 
@@ -158,32 +184,37 @@ Strip::set_route (boost::shared_ptr<Route> r)
        
        _solo->set_control (_route->solo_control());
        _mute->set_control (_route->mute_control());
-       set_vpot_mode (PanAzimuth);
+
+       set_vpot_parameter (PanAzimuthAutomation);
        
-       _route->solo_control()->Changed.connect(route_connections, invalidator(), ui_bind (&Strip::notify_solo_changed, this), ui_context());
-       _route->mute_control()->Changed.connect(route_connections, invalidator(), ui_bind (&Strip::notify_mute_changed, this), ui_context());
+       _route->solo_changed.connect (route_connections, MISSING_INVALIDATOR, boost::bind (&Strip::notify_solo_changed, this), ui_context());
+       _route->listen_changed.connect (route_connections, MISSING_INVALIDATOR, boost::bind (&Strip::notify_solo_changed, this), ui_context());
+
+       _route->mute_control()->Changed.connect(route_connections, MISSING_INVALIDATOR, boost::bind (&Strip::notify_mute_changed, this), ui_context());
 
        boost::shared_ptr<Pannable> pannable = _route->pannable();
 
-       if (pannable) {
-               pannable->pan_azimuth_control->Changed.connect(route_connections, invalidator(), ui_bind (&Strip::notify_panner_changed, this, false), ui_context());
-               pannable->pan_width_control->Changed.connect(route_connections, invalidator(), ui_bind (&Strip::notify_panner_changed, this, false), ui_context());
+       if (pannable && _route->panner()) {
+               pannable->pan_azimuth_control->Changed.connect(route_connections, MISSING_INVALIDATOR, boost::bind (&Strip::notify_panner_azi_changed, this, false), ui_context());
+               pannable->pan_width_control->Changed.connect(route_connections, MISSING_INVALIDATOR, boost::bind (&Strip::notify_panner_width_changed, this, false), ui_context());
        }
-       _route->gain_control()->Changed.connect(route_connections, invalidator(), ui_bind (&Strip::notify_gain_changed, this, false), ui_context());
-       _route->PropertyChanged.connect (route_connections, invalidator(), ui_bind (&Strip::notify_property_changed, this, _1), ui_context());
+       _route->gain_control()->Changed.connect(route_connections, MISSING_INVALIDATOR, boost::bind (&Strip::notify_gain_changed, this, false), ui_context());
+       _route->PropertyChanged.connect (route_connections, MISSING_INVALIDATOR, boost::bind (&Strip::notify_property_changed, this, _1), ui_context());
        
        boost::shared_ptr<Track> trk = boost::dynamic_pointer_cast<ARDOUR::Track>(_route);
        
        if (trk) {
                _recenable->set_control (trk->rec_enable_control());
-               trk->rec_enable_control()->Changed .connect(route_connections, invalidator(), ui_bind (&Strip::notify_record_enable_changed, this), ui_context());
+               trk->rec_enable_control()->Changed .connect(route_connections, MISSING_INVALIDATOR, boost::bind (&Strip::notify_record_enable_changed, this), ui_context());
+
+               
        }
        
        // TODO this works when a currently-banked route is made inactive, but not
        // when a route is activated which should be currently banked.
        
-       _route->active_changed.connect (route_connections, invalidator(), ui_bind (&Strip::notify_active_changed, this), ui_context());
-       _route->DropReferences.connect (route_connections, invalidator(), ui_bind (&Strip::notify_route_deleted, this), ui_context());
+       _route->active_changed.connect (route_connections, MISSING_INVALIDATOR, boost::bind (&Strip::notify_active_changed, this), ui_context());
+       _route->DropReferences.connect (route_connections, MISSING_INVALIDATOR, boost::bind (&Strip::notify_route_deleted, this), ui_context());
        
        /* Update */
        
@@ -194,73 +225,51 @@ Strip::set_route (boost::shared_ptr<Route> r)
        build_input_list (_route->input()->n_ports());
        build_output_list (_route->output()->n_ports());
 
-       current_pot_modes.clear();
+       possible_pot_parameters.clear();
 
        if (pannable) {
-               boost::shared_ptr<Panner> panner = pannable->panner();
+               boost::shared_ptr<Panner> panner = _route->panner();
                if (panner) {
                        set<Evoral::Parameter> automatable = panner->what_can_be_automated ();
                        set<Evoral::Parameter>::iterator a;
                        
                        if ((a = automatable.find (PanAzimuthAutomation)) != automatable.end()) {
-                               current_pot_modes.push_back (PanAzimuth);
+                               possible_pot_parameters.push_back (PanAzimuthAutomation);
                        }
                        
                        if ((a = automatable.find (PanWidthAutomation)) != automatable.end()) {
-                               current_pot_modes.push_back (PanWidth);
+                               possible_pot_parameters.push_back (PanWidthAutomation);
                        }
                }
        }
-
-       current_pot_modes.push_back (Input);
-       current_pot_modes.push_back (Output);
-
-       if (_route->nth_send (0) != 0) {
-               current_pot_modes.push_back (Send1);
-       }
-       if (_route->nth_send (1) != 0) {
-               current_pot_modes.push_back (Send2);
-       }
-       if (_route->nth_send (2) != 0) {
-               current_pot_modes.push_back (Send3);
-       }
-       if (_route->nth_send (3) != 0) {
-               current_pot_modes.push_back (Send4);
-       }
-       if (_route->nth_send (4) != 0) {
-               current_pot_modes.push_back (Send5);
-       }
-       if (_route->nth_send (5) != 0) {
-               current_pot_modes.push_back (Send6);
-       }
-       if (_route->nth_send (6) != 0) {
-               current_pot_modes.push_back (Send7);
-       }
-       if (_route->nth_send (7) != 0) {
-               current_pot_modes.push_back (Send8);
-       }
 }
 
-void 
+void
 Strip::notify_all()
 {
+       if (!_route) {
+               zero ();
+               return;
+       }
+
        notify_solo_changed ();
        notify_mute_changed ();
        notify_gain_changed ();
        notify_property_changed (PBD::PropertyChange (ARDOUR::Properties::name));
-       notify_panner_changed ();
+       notify_panner_azi_changed ();
+       notify_panner_width_changed ();
        notify_record_enable_changed ();
 }
 
-void 
+void
 Strip::notify_solo_changed ()
 {
        if (_route && _solo) {
-               _surface->write (_solo->set_state (_route->soloed() ? on : off));
+               _surface->write (_solo->set_state ((_route->soloed() || _route->listening_via_monitor()) ? on : off));
        }
 }
 
-void 
+void
 Strip::notify_mute_changed ()
 {
        DEBUG_TRACE (DEBUG::MackieControl, string_compose ("Strip %1 mute changed\n", _index));
@@ -272,7 +281,7 @@ Strip::notify_mute_changed ()
        }
 }
 
-void 
+void
 Strip::notify_record_enable_changed ()
 {
        if (_route && _recenable)  {
@@ -280,62 +289,58 @@ Strip::notify_record_enable_changed ()
        }
 }
 
-void 
+void
 Strip::notify_active_changed ()
 {
        _surface->mcp().refresh_current_bank();
 }
 
-void 
+void
 Strip::notify_route_deleted ()
 {
        _surface->mcp().refresh_current_bank();
 }
 
-void 
+void
 Strip::notify_gain_changed (bool force_update)
 {
-       DEBUG_TRACE (DEBUG::MackieControl, string_compose ("gain changed for strip %1, flip mode %2\n", _index, _surface->mcp().flip_mode()));
-
        if (_route) {
                
                Control* control;
 
-               if (_surface->mcp().flip_mode()) {
+               if (_surface->mcp().flip_mode() != MackieControlProtocol::Normal) {
                        control = _vpot;
                } else {
                        control = _fader;
                }
 
-               if (!control->in_use()) {
-
-                       float pos = _route->gain_control()->internal_to_interface (_route->gain_control()->get_value());
+               boost::shared_ptr<AutomationControl> ac = _route->gain_control();
+               
+               float gain_coefficient = ac->get_value();
+               float normalized_position = ac->internal_to_interface (gain_coefficient);
 
-                       if (force_update || pos != _last_gain_position_written) {
 
-                               if (_surface->mcp().flip_mode()) {
-                                       _surface->write (_vpot->set_all (pos, true, Pot::wrap));
-                                       do_parameter_display (GainAutomation, pos);
-                               } else {
-                                       _surface->write (_fader->set_position (pos));
-                                       do_parameter_display (GainAutomation, pos);
+               if (force_update || normalized_position != _last_gain_position_written) {
+                       
+                       if (_surface->mcp().flip_mode() != MackieControlProtocol::Normal) {
+                               if (!control->in_use()) {
+                                       _surface->write (_vpot->set (normalized_position, true, Pot::wrap));
                                }
-
-                               queue_display_reset (2000);
-                               _last_gain_position_written = pos;
-                               
+                               queue_parameter_display (GainAutomation, gain_coefficient);
                        } else {
-                               DEBUG_TRACE (DEBUG::MackieControl, "value is stale, no message sent\n");
+                               if (!control->in_use()) {
+                                       _surface->write (_fader->set_position (normalized_position));
+                               }
+                               queue_parameter_display (GainAutomation, gain_coefficient);
                        }
-               } else {
-                       DEBUG_TRACE (DEBUG::MackieControl, "fader in use, no message sent\n");
+
+                       queue_display_reset (2000);
+                       _last_gain_position_written = normalized_position;
                }
-       } else {
-               DEBUG_TRACE (DEBUG::MackieControl, "no route or no fader\n");
        }
 }
 
-void 
+void
 Strip::notify_property_changed (const PropertyChange& what_changed)
 {
        if (!what_changed.contains (ARDOUR::Properties::name)) {
@@ -356,8 +361,8 @@ Strip::notify_property_changed (const PropertyChange& what_changed)
        }
 }
 
-void 
-Strip::notify_panner_changed (bool force_update)
+void
+Strip::notify_panner_azi_changed (bool force_update)
 {
        if (_route) {
 
@@ -365,60 +370,99 @@ Strip::notify_panner_changed (bool force_update)
 
                boost::shared_ptr<Pannable> pannable = _route->pannable();
 
-               if (!pannable) {
+               if (!pannable || !_route->panner()) {
                        _surface->write (_vpot->zero());
                        return;
                }
 
-               Control* control;
+               Control* control = control_by_parameter[PanAzimuthAutomation];
 
-               if (_surface->mcp().flip_mode()) {
-                       control = _fader;
-               } else {
-                       control = _vpot;
+               if (!control) {
+                       return;
                }
 
-               if (!control->in_use()) {
+               double pos = pannable->pan_azimuth_control->internal_to_interface (pannable->pan_azimuth_control->get_value());
+               
+               if (force_update || pos != _last_pan_azi_position_written) {
+
+                       if (control == _fader) {
+                               if (!_fader->in_use()) {
+                                       _surface->write (_fader->set_position (pos));
+                               }
+                       } else if (control == _vpot) {
+                               _surface->write (_vpot->set (pos, true, Pot::dot));
+                       }
                        
-                       double pos = pannable->pan_azimuth_control->internal_to_interface (pannable->pan_azimuth_control->get_value());
+                       queue_parameter_display (PanAzimuthAutomation, pos);
+                       queue_display_reset (2000);
+                       _last_pan_azi_position_written = pos;
+               }
+       }
+}
+
+void
+Strip::notify_panner_width_changed (bool force_update)
+{
+       if (_route) {
+
+               DEBUG_TRACE (DEBUG::MackieControl, string_compose ("pan width change for strip %1\n", _index));
+
+               boost::shared_ptr<Pannable> pannable = _route->pannable();
+
+               if (!pannable || !_route->panner()) {
+                       _surface->write (_vpot->zero());
+                       return;
+               }
+
+
+               Control* control = control_by_parameter[PanWidthAutomation];
+
+               if (!control) {
+                       return;
+               }       
                        
-                       if (force_update || pos != _last_pan_position_written) {
-                               
-                               if (_surface->mcp().flip_mode()) {
-                                       
-                                       _surface->write (_fader->set_position (pos));
-                                       do_parameter_display (PanAzimuthAutomation, pos);
-                               } else {
-                                       _surface->write (_vpot->set_all (pos, true, Pot::dot));
-                                       do_parameter_display (PanAzimuthAutomation, pos);
+               double pos = pannable->pan_width_control->internal_to_interface (pannable->pan_width_control->get_value());
+               
+               if (force_update || pos != _last_pan_azi_position_written) {
+                       
+                       if (_surface->mcp().flip_mode() != MackieControlProtocol::Normal) {
+
+                               if (control == _fader) {
+                                       if (!control->in_use()) {
+                                               _surface->write (_fader->set_position (pos));
+                                       }
                                }
 
-                               queue_display_reset (2000);
-                               _last_pan_position_written = pos;
+                       } else if (control == _vpot) {
+                               _surface->write (_vpot->set (pos, true, Pot::spread));
                        }
+                       
+                       queue_parameter_display (PanWidthAutomation, pos);
+                       queue_display_reset (2000);
+                       _last_pan_azi_position_written = pos;
                }
        }
 }
 
 void
-Strip::select_event (Button& button, ButtonState bs)
+Strip::select_event (Button&, ButtonState bs)
 {
        DEBUG_TRACE (DEBUG::MackieControl, "select button\n");
        
        if (bs == press) {
                
-               int ms = _surface->mcp().modifier_state();
+               int ms = _surface->mcp().main_modifier_state();
 
                if (ms & MackieControlProtocol::MODIFIER_CMDALT) {
                        _controls_locked = !_controls_locked;
                        _surface->write (display (1,_controls_locked ?  "Locked" : "Unlock"));
                        queue_display_reset (1000);
-                               return;
+                       return;
                }
                
                if (ms & MackieControlProtocol::MODIFIER_SHIFT) {
                        /* reset to default */
-                       boost::shared_ptr<AutomationControl> ac = _vpot->control ();
+                       boost::shared_ptr<AutomationControl> ac = _fader->control ();
                        if (ac) {
                                ac->set_value (ac->normal());
                        }
@@ -436,16 +480,16 @@ Strip::select_event (Button& button, ButtonState bs)
 }
 
 void
-Strip::vselect_event (Button& button, ButtonState bs)
+Strip::vselect_event (Button&, ButtonState bs)
 {
        if (bs == press) {
 
-
-               int ms = _surface->mcp().modifier_state();
+               int ms = _surface->mcp().main_modifier_state();
                                
                if (ms & MackieControlProtocol::MODIFIER_SHIFT) {
-                       boost::shared_ptr<AutomationControl> ac = button.control ();
 
+                       boost::shared_ptr<AutomationControl> ac = _vpot->control ();
+                               
                        if (ac) {
                                
                                /* reset to default/normal value */
@@ -453,6 +497,7 @@ Strip::vselect_event (Button& button, ButtonState bs)
                        }
 
                }  else {
+
                        DEBUG_TRACE (DEBUG::MackieControl, "switching to next pot mode\n");
                        next_pot_mode ();
                }
@@ -461,21 +506,28 @@ Strip::vselect_event (Button& button, ButtonState bs)
 }
 
 void
-Strip::fader_touch_event (Button& button, ButtonState bs)
+Strip::fader_touch_event (Button&, ButtonState bs)
 {
        DEBUG_TRACE (DEBUG::MackieControl, string_compose ("fader touch, press ? %1\n", (bs == press)));
        
-       /* never use the modified control for fader stuff */
-       
        if (bs == press) {
-               
-               _fader->set_in_use (true);
-               _fader->start_touch (_surface->mcp().transport_frame());
+
                boost::shared_ptr<AutomationControl> ac = _fader->control ();
+
+               if (_surface->mcp().main_modifier_state() & MackieControlProtocol::MODIFIER_SHIFT) {
                        if (ac) {
-                               do_parameter_display ((AutomationType) ac->parameter().type(), ac->internal_to_interface (ac->get_value()));
+                               ac->set_value (ac->normal());
+                       }
+               } else {
+
+                       _fader->set_in_use (true);
+                       _fader->start_touch (_surface->mcp().transport_frame());
+                       
+                       if (ac) {
+                               queue_parameter_display ((AutomationType) ac->parameter().type(), ac->internal_to_interface (ac->get_value()));
                                queue_display_reset (2000);
                        }
+               }
                        
        } else {
                
@@ -519,7 +571,7 @@ Strip::handle_button (Button& button, ButtonState bs)
                                _surface->mcp().add_down_button ((AutomationType) control->parameter().type(), _surface->number(), _index);
                                
                                float new_value;
-                               int ms = _surface->mcp().modifier_state();
+                               int ms = _surface->mcp().main_modifier_state();
                                
                                if (ms & MackieControlProtocol::MODIFIER_SHIFT) {
                                        /* reset to default/normal value */
@@ -555,18 +607,26 @@ Strip::handle_button (Button& button, ButtonState bs)
 }
 
 void
-Strip::do_parameter_display (AutomationType type, float val)
+Strip::queue_parameter_display (AutomationType type, float val)
 {
-       float dB;
+       RedisplayRequest req;
+
+       req.type = type;
+       req.val = val;
+
+       redisplay_requests.write (&req, 1);
+}
 
+void
+Strip::do_parameter_display (AutomationType type, float val)
+{
        switch (type) {
        case GainAutomation:
-               dB = fast_coefficient_to_dB (val);
                if (val == 0.0) {
                        _surface->write (display (1, " -inf "));
                } else {
                        char buf[16];
-                       
+                       float dB = accurate_coefficient_to_dB (val);
                        snprintf (buf, sizeof (buf), "%6.1f", dB);
                        _surface->write (display (1, buf));
                }               
@@ -575,28 +635,52 @@ Strip::do_parameter_display (AutomationType type, float val)
        case PanAzimuthAutomation:
                if (_route) {
                        boost::shared_ptr<Pannable> p = _route->pannable();
-                       if (p && p->panner()) {
-                               string str = p->panner()->value_as_string (p->pan_azimuth_control);
+                       if (p && _route->panner()) {
+                               string str =_route->panner()->value_as_string (p->pan_azimuth_control);
                                _surface->write (display (1, str));
                        }
                }
+               break;
+
+       case PanWidthAutomation:
+               if (_route) {
+                       char buf[16];
+                       snprintf (buf, sizeof (buf), "%5ld%%", lrintf ((val * 200.0)-100));
+                       _surface->write (display (1, buf));
+               }
+               break;
+
        default:
                break;
        }
 }
 
+void
+Strip::handle_fader_touch (Fader& fader, bool touch_on)
+{
+       if (touch_on) {
+               fader.start_touch (_surface->mcp().transport_frame());
+       } else {
+               fader.stop_touch (_surface->mcp().transport_frame(), false);
+       }
+}
+
 void
 Strip::handle_fader (Fader& fader, float position)
 {
        DEBUG_TRACE (DEBUG::MackieControl, string_compose ("fader to %1\n", position));
 
        fader.set_value (position);
-       fader.start_touch (_surface->mcp().transport_frame());
-       queue_display_reset (2000);
 
-       // must echo bytes back to slider now, because
-       // the notifier only works if the fader is not being
-       // touched. Which it is if we're getting input.
+       /* From the Mackie Control MIDI implementation docs:
+
+          In order to ensure absolute synchronization with the host software,
+          Mackie Control uses a closed-loop servo system for the faders,
+          meaning the faders will always move to their last received position.
+          When a host receives a Fader Position Message, it must then
+          re-transmit that message to the Mackie Control or else the faders
+          will return to their last position.
+       */
 
        _surface->write (fader.set_position (position));
 }
@@ -608,12 +692,11 @@ Strip::handle_pot (Pot& pot, float delta)
           stop moving. So to get a stop event, we need to use a timeout.
        */
        
-       pot.start_touch (_surface->mcp().transport_frame());
-
+       boost::shared_ptr<AutomationControl> ac = pot.control();
        double p = pot.get_value ();
        p += delta;
-       p = min (1.0, p);
-       p = max (0.0, p);
+       p = max (ac->lower(), p);
+       p = min (ac->upper(), p);
        pot.set_value (p);
 }
 
@@ -632,7 +715,23 @@ Strip::periodic (uint64_t usecs)
        }
 }
 
-void 
+void
+Strip::redisplay ()
+{
+       RedisplayRequest req;
+       bool have_request = false;
+
+       while (redisplay_requests.read (&req, 1) == 1) {
+               /* read them all */
+               have_request = true;
+       }
+
+       if (have_request) {
+               do_parameter_display (req.type, req.val);
+       }
+}
+
+void
 Strip::update_automation ()
 {
        ARDOUR::AutoState gain_state = _route->gain_control()->automation_state();
@@ -644,7 +743,8 @@ Strip::update_automation ()
        if (_route->panner()) {
                ARDOUR::AutoState panner_state = _route->panner()->automation_state();
                if (panner_state == Touch || panner_state == Play) {
-                       notify_panner_changed (false);
+                       notify_panner_azi_changed (false);
+                       notify_panner_width_changed (false);
                }
        }
 }
@@ -652,25 +752,21 @@ Strip::update_automation ()
 void
 Strip::update_meter ()
 {
-       if (_meter) {
-               float dB = const_cast<PeakMeter&> (_route->peak_meter()).peak_power (0);
-               _surface->write (_meter->update_message (dB));
+       if (_meter && _transport_is_rolling && _metering_active) {
+               float dB = const_cast<PeakMeter&> (_route->peak_meter()).meter_level (0, MeterMCP);
+               _meter->send_update (*_surface, dB);
        }
 }
 
-MidiByteArray
+void
 Strip::zero ()
 {
-       MidiByteArray retval;
-
        for (Group::Controls::const_iterator it = _controls.begin(); it != _controls.end(); ++it) {
-               retval << (*it)->zero ();
+               _surface->write ((*it)->zero ());
        }
 
-       retval << blank_display (0);
-       retval << blank_display (1);
-       
-       return retval;
+       _surface->write (blank_display (0));
+       _surface->write (blank_display (1));
 }
 
 MidiByteArray
@@ -696,10 +792,16 @@ Strip::display (uint32_t line_number, const std::string& line)
        // offset (0 to 0x37 first line, 0x38 to 0x6f for second line)
        retval << (_index * 7 + (line_number * 0x38));
        
-       // ascii data to display
-       retval << line;
+       // ascii data to display. @param line is UTF-8
+       string ascii = Glib::convert_with_fallback (line, "UTF-8", "ISO-8859-1", "_");
+       string::size_type len = ascii.length();
+       if (len > 6) {
+               ascii = ascii.substr (0, 6);
+               len = 6;
+       }
+       retval << ascii;
        // pad with " " out to 6 chars
-       for (int i = line.length(); i < 6; ++i) {
+       for (int i = len; i < 6; ++i) {
                retval << ' ';
        }
        
@@ -711,8 +813,6 @@ Strip::display (uint32_t line_number, const std::string& line)
        // sysex trailer
        retval << MIDI::eox;
        
-       DEBUG_TRACE (DEBUG::MackieControl, string_compose ("MackieMidiBuilder::strip_display midi: %1\n", retval));
-
        return retval;
 }
 
@@ -728,54 +828,41 @@ Strip::unlock_controls ()
        _controls_locked = false;
 }
 
-MidiByteArray
-Strip::gui_selection_changed (ARDOUR::RouteNotificationListPtr rl)
+void
+Strip::gui_selection_changed (const ARDOUR::StrongRouteNotificationList& rl)
 {
-       for (ARDOUR::RouteNotificationList::iterator i = rl->begin(); i != rl->end(); ++i) {
+       for (ARDOUR::StrongRouteNotificationList::const_iterator i = rl.begin(); i != rl.end(); ++i) {
                if ((*i) == _route) {
-                       return _select->set_state (on);
+                       _surface->write (_select->set_state (on));
+                       return;
                }
        }
 
-       return _select->set_state (off);
+       _surface->write (_select->set_state (off));
 }
 
 string
 Strip::vpot_mode_string () const
 {
-       switch (_vpot_mode) {
-       case Gain:
+       boost::shared_ptr<AutomationControl> ac = _vpot->control();
+       
+       if (!ac) {
+               return string();
+       }
+
+       switch (ac->parameter().type()) {
+       case GainAutomation:
                return "Fader";
-       case PanAzimuth:
+       case PanAzimuthAutomation:
                return "Pan";
-       case PanWidth:
+       case PanWidthAutomation:
                return "Width";
-       case PanElevation:
+       case PanElevationAutomation:
                return "Elev";
-       case PanFrontBack:
+       case PanFrontBackAutomation:
                return "F/Rear";
-       case PanLFE:
+       case PanLFEAutomation:
                return "LFE";
-       case Input:
-               return "Input";
-       case Output:
-               return "Output";
-       case Send1:
-               return "Send 1";
-       case Send2:
-               return "Send 2";
-       case Send3:
-               return "Send 3";
-       case Send4:
-               return "Send 4";
-       case Send5:
-               return "Send 5";
-       case Send6:
-               return "Send 6";
-       case Send7:
-               return "Send 7";
-       case Send8:
-               return "Send 8";
        }
 
        return "???";
@@ -788,12 +875,17 @@ Strip::flip_mode_changed (bool notify)
                return;
        }
 
+       reset_saved_values ();
+
        boost::shared_ptr<AutomationControl> fader_controllable = _fader->control ();
        boost::shared_ptr<AutomationControl> vpot_controllable = _vpot->control ();
 
        _fader->set_control (vpot_controllable);
        _vpot->set_control (fader_controllable);
 
+       control_by_parameter[fader_controllable->parameter()] = _vpot;
+       control_by_parameter[vpot_controllable->parameter()] = _fader;
+
        _surface->write (display (1, vpot_mode_string ()));
 
        if (notify) {
@@ -826,10 +918,15 @@ Strip::clear_display_reset ()
 void
 Strip::reset_display ()
 {
-       _surface->write (display (1, vpot_mode_string()));
+       if (_route) {
+               _surface->write (display (1, vpot_mode_string()));
+       } else {
+               _surface->write (blank_display (1));
+       }
+               
        clear_display_reset ();
 }
-                        
+                       
 struct RouteCompareByName {
        bool operator() (boost::shared_ptr<Route> a, boost::shared_ptr<Route> b) {
                return a->name().compare (b->name()) < 0;
@@ -910,18 +1007,29 @@ Strip::build_output_list (const ChanCount& channels)
 void
 Strip::next_pot_mode ()
 {
-       vector<PotMode>::iterator i;
+       vector<Evoral::Parameter>::iterator i;
 
-       if (_surface->mcp().flip_mode()) {
+       if (_surface->mcp().flip_mode() != MackieControlProtocol::Normal) {
                /* do not change vpot mode while in flipped mode */
                DEBUG_TRACE (DEBUG::MackieControl, "not stepping pot mode - in flip mode\n");
                _surface->write (display (1, "Flip"));
-               queue_display_reset (2000);
+               queue_display_reset (1000);
                return;
        }
 
-       for (i = current_pot_modes.begin(); i != current_pot_modes.end(); ++i) {
-               if ((*i) == _vpot_mode) {
+
+       boost::shared_ptr<AutomationControl> ac = _vpot->control();
+
+       if (!ac) {
+               return;
+       }
+
+       if (possible_pot_parameters.empty() || (possible_pot_parameters.size() == 1 && possible_pot_parameters.front() == ac->parameter())) {
+               return;
+       }
+
+       for (i = possible_pot_parameters.begin(); i != possible_pot_parameters.end(); ++i) {
+               if ((*i) == ac->parameter()) {
                        break;
                }
        }
@@ -930,112 +1038,124 @@ Strip::next_pot_mode ()
           also happen if the current mode is not in the current pot mode list)
        */
 
-       if (i != current_pot_modes.end()) {
+       if (i != possible_pot_parameters.end()) {
                ++i;
        }
 
-       if (i == current_pot_modes.end()) {
-               i = current_pot_modes.begin();
+       if (i == possible_pot_parameters.end()) {
+               i = possible_pot_parameters.begin();
        }
 
-       set_vpot_mode (*i);
+       set_vpot_parameter (*i);
 }
 
 void
-Strip::set_vpot_mode (PotMode m)
+Strip::set_vpot_parameter (Evoral::Parameter p)
 {
-       boost::shared_ptr<Send> send;
        boost::shared_ptr<Pannable> pannable;
 
-       DEBUG_TRACE (DEBUG::MackieControl, string_compose ("switch to vpot mode %1\n", m));
+       DEBUG_TRACE (DEBUG::MackieControl, string_compose ("switch to vpot mode %1\n", p));
 
-       if (!_route) {
-               return;
-       }
+       reset_saved_values ();
 
-       _vpot_mode = m;
-
-       switch (_vpot_mode) {
-       case Gain:
-               break;
-       case PanAzimuth:
+       switch (p.type()) {
+       case PanAzimuthAutomation:
                pannable = _route->pannable ();
                if (pannable) {
-                       if (_surface->mcp().flip_mode()) {
+                       if (_surface->mcp().flip_mode() != MackieControlProtocol::Normal) {
                                /* gain to vpot, pan azi to fader */
                                _vpot->set_control (_route->gain_control());
+                               control_by_parameter[GainAutomation] = _vpot;
                                if (pannable) {
                                        _fader->set_control (pannable->pan_azimuth_control);
+                                       control_by_parameter[PanAzimuthAutomation] = _fader;
+                               } else {
+                                       _fader->set_control (boost::shared_ptr<AutomationControl>());
+                                       control_by_parameter[PanAzimuthAutomation] = 0;
                                }
-                               _vpot_mode = Gain;
                        } else {
                                /* gain to fader, pan azi to vpot */
                                _fader->set_control (_route->gain_control());
+                               control_by_parameter[GainAutomation] = _fader;
                                if (pannable) {
                                        _vpot->set_control (pannable->pan_azimuth_control);
+                                       control_by_parameter[PanAzimuthAutomation] = _vpot;
+                               } else {
+                                       _vpot->set_control (boost::shared_ptr<AutomationControl>());
+                                       control_by_parameter[PanAzimuthAutomation] = 0;
                                }
                        }
                }
                break;
-       case PanWidth:
+       case PanWidthAutomation:
                pannable = _route->pannable ();
                if (pannable) {
-                       if (_surface->mcp().flip_mode()) {
+                       if (_surface->mcp().flip_mode() != MackieControlProtocol::Normal) {
                                /* gain to vpot, pan width to fader */
                                _vpot->set_control (_route->gain_control());
+                               control_by_parameter[GainAutomation] = _vpot;
                                if (pannable) {
                                        _fader->set_control (pannable->pan_width_control);
+                                       control_by_parameter[PanWidthAutomation] = _fader;
+                               } else {
+                                       _fader->set_control (boost::shared_ptr<AutomationControl>());
+                                       control_by_parameter[PanWidthAutomation] = 0;
                                }
-                               _vpot_mode = Gain;
                        } else {
                                /* gain to fader, pan width to vpot */
                                _fader->set_control (_route->gain_control());
+                               control_by_parameter[GainAutomation] = _fader;
                                if (pannable) {
                                        _vpot->set_control (pannable->pan_width_control);
-                               }
-                       }
-               }
-               break;
-       case PanElevation:
-               break;
-       case PanFrontBack:
-               break;
-       case PanLFE:
-               break;
-       case Input:
-               break;
-       case Output:
-               break;
-       case Send1:
-               send = boost::dynamic_pointer_cast<Send> (_route->nth_send (0));
-               if (send) {
-                       if (_surface->mcp().flip_mode()) {
-                               /* route gain to vpot, send gain to fader */
-                               _fader->set_control (send->amp()->gain_control());
-                               _vpot->set_control (_route->gain_control());
-                               _vpot_mode = Gain;
+                                       control_by_parameter[PanWidthAutomation] = _vpot;
                                } else {
-                               /* route gain to fader, send gain to vpot */
-                               _vpot->set_control (send->amp()->gain_control());
-                               _fader->set_control (_route->gain_control());
+                                       _vpot->set_control (boost::shared_ptr<AutomationControl>());
+                                       control_by_parameter[PanWidthAutomation] = 0;
+                               }
                        }
                }
                break;
-       case Send2:
-               break;
-       case Send3:
-               break;
-       case Send4:
+       case PanElevationAutomation:
                break;
-       case Send5:
+       case PanFrontBackAutomation:
                break;
-       case Send6:
+       case PanLFEAutomation:
                break;
-       case Send7:
-               break;
-       case Send8:
-               break;
-       };
+       }
 
        _surface->write (display (1, vpot_mode_string()));
 }
+
+void
+Strip::reset_saved_values ()
+{
+       _last_pan_azi_position_written = -1.0;
+       _last_pan_width_position_written = -1.0;
+       _last_gain_position_written = -1.0;
+
+}
+
+void
+Strip::notify_metering_state_changed()
+{
+       if (!_route || !_meter) {
+               return;
+       }
+       
+       bool transport_is_rolling = (_surface->mcp().get_transport_speed () != 0.0f);
+       bool metering_active = _surface->mcp().metering_active ();
+       
+       if ((_transport_is_rolling == transport_is_rolling) && (_metering_active == metering_active)) {
+               return;
+       }
+       
+       _meter->notify_metering_state_changed (*_surface, transport_is_rolling, metering_active);
+       
+       if (!transport_is_rolling || !metering_active) {
+               notify_property_changed (PBD::PropertyChange (ARDOUR::Properties::name));
+               notify_panner_azi_changed (true);
+       }
+       
+       _transport_is_rolling = transport_is_rolling;
+       _metering_active = metering_active;
+}