lots of odds and ends to do with solo isolate and its GUI

git-svn-id: svn://localhost/ardour2/branches/3.0@7072 d708f5d6-7413-0410-9779-e7cbd77b26cf

12 files changed, 186 insertions, 44 deletions

diff --git a/gtk2_ardour/ardour3_ui_dark.rc.in b/gtk2_ardour/ardour3_ui_dark.rc.in
index 1c1fdd520c..e423ad7960 100644
--- a/gtk2_ardour/ardour3_ui_dark.rc.in
+++ b/gtk2_ardour/ardour3_ui_dark.rc.in
@@ -332,14 +332,14 @@ style "solo_button" = "small_button"
 
 style "solo_isolate_led"
 {
+        fg[NORMAL] = { 0.725, 0.925, 0.949 }
        	fg[ACTIVE] = { 1.0, 0, 0 }
-       	fg[NORMAL] = { 0, 1.0, 0 } 
 }
 
 style "solo_safe_led"
 {
-       	fg[ACTIVE] = { 0.26, 0.47, 0.69 } 
-       	fg[NORMAL] = { 0, 1.0, 0 } 
+	fg[NORMAL] = { 0.725, 0.925, 0.949 }
+       	fg[ACTIVE] = { 1.0, 0, 0 } 
 }
 
 style "solo_button_alternate" = "small_button"
@@ -456,6 +456,13 @@ style "monitor_dim_button" = "small_button"
 	fg[ACTIVE] = { 0, 0, 0 }
 }
 
+style "monitor_iso_button" = "small_button"
+{
+	font_name = "@FONT_SMALLER@"
+	bg[ACTIVE] = { 0.725, 0.925, 0.949 }
+	fg[ACTIVE] = { 0, 0, 0 }
+}
+
 style "mute_button" = "small_button"
 {
 	bg[ACTIVE] = { 0.90, 0.89, 0.73 }
@@ -1689,6 +1696,8 @@ widget "*MonitorInvertButton" style:highest "monitor_invert_button"
 widget "*MonitorInvertButton*" style:highest "monitor_invert_button"
 widget "*MonitorOptButton" style:highest "monitor_opt_button"
 widget "*MonitorOptButton*" style:highest "monitor_opt_button"
+widget "*MonitorIsoAlert" style:highest "monitor_iso_button"
+widget "*MonitorIsoAlert*" style:highest "monitor_iso_button"
 widget "*BypassButton" style:highest "red_when_active"
 widget "*BypassButton*" style:highest "red_when_active"
 widget "*TransportSoloAlert" style:highest "flashing_alert"
@@ -1806,4 +1815,4 @@ widget "*PortMatrixLabel*" style:highest "small_text"
 widget "*MidiTracerTextView" style:highest "midi_tracer_textview"
 widget "*SoloIsolatedLED" style:highest "solo_isolate_led"
 widget "*SoloSafeLED" style:highest "solo_safe_led"
-widget "*SoloLEDLabel" style:highest "smallest_text"
+widget "*SoloLEDLabel" style:highest "very_small_text"
diff --git a/gtk2_ardour/led.cc b/gtk2_ardour/led.cc
index 645b65e99b..76d71bc35e 100644
--- a/gtk2_ardour/led.cc
+++ b/gtk2_ardour/led.cc
@@ -122,24 +122,7 @@ LED::set_visual_state (int32_t s)
         if (s != _visual_state) {
 
                 _visual_state = s;
-
-                RefPtr<Style> style = get_style();
-                Color c;
-                
-                switch (_visual_state) {
-                case 0:
-                        c = style->get_fg (STATE_NORMAL);
-                        break;
-                default:
-                        c = style->get_fg (STATE_ACTIVE);
-                        break;
-                }
-
-                _red = c.get_red_p ();
-                _green = c.get_green_p ();
-                _blue = c.get_blue_p ();
-                
-                set_dirty ();
+                set_colors_from_style ();
         }
 }
 
@@ -156,6 +139,13 @@ LED::set_diameter (float d)
 }
 
 void
+LED::on_realize ()
+{
+        set_colors_from_style ();
+        CairoWidget::on_realize ();
+}
+
+void
 LED::on_size_request (Gtk::Requisition* req)
 {
         if (_fixed_diameter) {
@@ -165,3 +155,25 @@ LED::on_size_request (Gtk::Requisition* req)
                 CairoWidget::on_size_request (req);
         }
 }
+
+void
+LED::set_colors_from_style ()
+{
+        RefPtr<Style> style = get_style();
+        Color c;
+        
+        switch (_visual_state) {
+        case 0:
+                c = style->get_fg (STATE_NORMAL);
+                break;
+        default:
+                c = style->get_fg (STATE_ACTIVE);
+                break;
+        }
+        
+        _red = c.get_red_p ();
+        _green = c.get_green_p ();
+        _blue = c.get_blue_p ();
+        
+        set_dirty ();
+}
diff --git a/gtk2_ardour/led.h b/gtk2_ardour/led.h
index 6350a36ba3..06ac7454df 100644
--- a/gtk2_ardour/led.h
+++ b/gtk2_ardour/led.h
@@ -37,7 +37,8 @@ class LED : public CairoWidget
   protected:
 	void render (cairo_t *);
         void on_size_request (Gtk::Requisition* req);
-        
+        void on_realize ();
+
   private:
         int32_t _visual_state;
         bool  _active;
@@ -46,6 +47,8 @@ class LED : public CairoWidget
         float _red;
         float _green;
         float _blue;
+
+        void set_colors_from_style ();
 };
 
 #endif /* __gtk2_ardour_led_h__ */
diff --git a/gtk2_ardour/mixer_strip.cc b/gtk2_ardour/mixer_strip.cc
index df9fc36084..ede93736e9 100644
--- a/gtk2_ardour/mixer_strip.cc
+++ b/gtk2_ardour/mixer_strip.cc
@@ -188,7 +188,7 @@ MixerStrip::init ()
 
         solo_isolated_led = manage (new LED);
         solo_isolated_led->show ();
-        solo_isolated_led->set_diameter (5);
+        solo_isolated_led->set_diameter (6);
         solo_isolated_led->set_no_show_all (true);
         solo_isolated_led->set_name (X_("SoloIsolatedLED"));
         solo_isolated_led->add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK);
@@ -197,7 +197,7 @@ MixerStrip::init ()
 
         solo_safe_led = manage (new LED);
         solo_safe_led->show ();
-        solo_safe_led->set_diameter (5);
+        solo_safe_led->set_diameter (6);
         solo_safe_led->set_no_show_all (true);
         solo_safe_led->set_name (X_("SoloSafeLED"));
         solo_safe_led->add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK);
@@ -215,10 +215,10 @@ MixerStrip::init ()
 
         solo_led_table.set_spacings (0);
         solo_led_table.set_border_width (1);
-        solo_led_table.attach (*solo_isolated_led, 0, 1, 0, 1, Gtk::FILL, Gtk::FILL);
-        solo_led_table.attach (*iso_label, 1, 2, 0, 1, Gtk::FILL, Gtk::FILL);
-        solo_led_table.attach (*solo_safe_led, 0, 1, 1, 2, Gtk::FILL, Gtk::FILL);
-        solo_led_table.attach (*safe_label, 1, 2, 1, 2, Gtk::FILL, Gtk::FILL);
+        solo_led_table.attach (*iso_label, 0, 1, 0, 1, Gtk::FILL, Gtk::FILL);
+        solo_led_table.attach (*solo_isolated_led, 1, 2, 0, 1, Gtk::FILL, Gtk::FILL);
+        solo_led_table.attach (*safe_label, 0, 1, 1, 2, Gtk::FILL, Gtk::FILL);
+        solo_led_table.attach (*solo_safe_led, 1, 2, 1, 2, Gtk::FILL, Gtk::FILL);
 
         solo_led_table.show ();
         solo_led_box.pack_end (solo_led_table, false, false);
diff --git a/gtk2_ardour/monitor_section.cc b/gtk2_ardour/monitor_section.cc
index a5331a0c8e..5b60942bb1 100644
--- a/gtk2_ardour/monitor_section.cc
+++ b/gtk2_ardour/monitor_section.cc
@@ -51,6 +51,7 @@ MonitorSection::MonitorSection (Session* s)
         , dim_all_button (_("dim"))
         , mono_button (_("mono"))
         , rude_solo_button (_("soloing"))
+        , rude_iso_button (_("isolated"))
         , rude_audition_button (_("auditioning"))
         , exclusive_solo_button (_("Exclusive"))
         , solo_mute_override_button (_("Solo/Mute"))
@@ -92,6 +93,9 @@ MonitorSection::MonitorSection (Session* s)
 	rude_solo_button.set_name ("TransportSoloAlert");
         rude_solo_button.show ();
 
+	rude_iso_button.set_name ("MonitorIsoAlert");
+        rude_iso_button.show ();
+
 	rude_audition_button.set_name ("TransportAuditioningAlert");
         rude_audition_button.show ();
 
@@ -100,6 +104,9 @@ MonitorSection::MonitorSection (Session* s)
 	rude_solo_button.signal_button_press_event().connect (sigc::mem_fun(*this, &MonitorSection::cancel_solo), false);
         UI::instance()->set_tip (rude_solo_button, _("When active, something is soloed.\nClick to de-solo everything"));
 
+	rude_iso_button.signal_button_press_event().connect (sigc::mem_fun(*this, &MonitorSection::cancel_isolate), false);
+        UI::instance()->set_tip (rude_iso_button, _("When active, something is solo-isolated.\nClick to de-isolate everything"));
+
 	rude_audition_button.signal_button_press_event().connect (sigc::mem_fun(*this, &MonitorSection::cancel_audition), false);
         UI::instance()->set_tip (rude_audition_button, _("When active, auditioning is active.\nClick to stop the audition"));
 
@@ -182,7 +189,12 @@ MonitorSection::MonitorSection (Session* s)
         solo_opt_box->show ();
         
         upper_packer.set_spacing (12);
-        upper_packer.pack_start (rude_solo_button, false, false);
+
+        Gtk::HBox* rude_box = manage (new HBox);
+        rude_box->pack_start (rude_solo_button, true, true);
+        rude_box->pack_start (rude_iso_button, true, true);
+
+        upper_packer.pack_start (*rude_box, false, false);
         upper_packer.pack_start (rude_audition_button, false, false);
         upper_packer.pack_start (solo_model_box, false, false);
         upper_packer.pack_start (*solo_opt_box, false, false);
@@ -306,12 +318,13 @@ MonitorSection::set_session (Session* s)
                         _route.reset ();
                 }
                 
-                        
         } else {
                 /* no session */
                 _monitor.reset ();
                 _route.reset ();
                 control_connections.drop_connections ();
+                rude_iso_button.set_active (false);
+                rude_solo_button.set_active (false);
         }
 
         /* both might be null */
@@ -920,9 +933,15 @@ MonitorSection::solo_blink (bool onoff)
 		} else {
 			rude_solo_button.set_state (STATE_NORMAL);
 		}
+
+                if (_session->soloing()) {
+                        rude_iso_button.set_active (_session->solo_isolated());
+                }
+
 	} else {
 		// rude_solo_button.set_active (false);
 		rude_solo_button.set_state (STATE_NORMAL);
+                rude_iso_button.set_active (false);
 	}
 }
 
@@ -941,6 +960,17 @@ MonitorSection::cancel_solo (GdkEventButton* ev)
 }
 
 bool
+MonitorSection::cancel_isolate (GdkEventButton* ev)
+{
+        if (_session) {
+                boost::shared_ptr<RouteList> rl (_session->get_routes ());
+                _session->set_solo_isolated (rl, false, Session::rt_cleanup, true);
+        }
+
+        return true;
+}
+
+bool
 MonitorSection::cancel_audition (GdkEventButton* ev)
 {
 	if (_session) {
diff --git a/gtk2_ardour/monitor_section.h b/gtk2_ardour/monitor_section.h
index d543ea1acd..b3edb624b9 100644
--- a/gtk2_ardour/monitor_section.h
+++ b/gtk2_ardour/monitor_section.h
@@ -115,6 +115,7 @@ class MonitorSection : public RouteUI
         BindableToggleButton dim_all_button;
         BindableToggleButton mono_button;
         BindableToggleButton rude_solo_button;
+        BindableToggleButton rude_iso_button;
         BindableToggleButton rude_audition_button;
         BindableToggleButton exclusive_solo_button;
         BindableToggleButton solo_mute_override_button;
@@ -123,11 +124,13 @@ class MonitorSection : public RouteUI
         void solo_blink (bool);
         void audition_blink (bool);
         bool cancel_solo (GdkEventButton*);
+        bool cancel_isolate (GdkEventButton*);
         bool cancel_audition (GdkEventButton*);
         void solo_cut_changed ();
         void update_solo_model ();
         void parameter_changed (std::string);
-        
+        void isolated_changed ();
+
         PBD::ScopedConnection config_connection;
         PBD::ScopedConnectionList control_connections;
         
diff --git a/gtk2_ardour/route_ui.cc b/gtk2_ardour/route_ui.cc
index 3bc36da091..58d5a721b5 100644
--- a/gtk2_ardour/route_ui.cc
+++ b/gtk2_ardour/route_ui.cc
@@ -1072,13 +1072,33 @@ RouteUI::muting_change ()
 bool
 RouteUI::solo_isolate_button_release (GdkEventButton* ev)
 {
+        if (ev->type == GDK_2BUTTON_PRESS || ev->type == GDK_3BUTTON_PRESS) {
+                return true;
+        }
+
         bool view = (solo_isolated_led->visual_state() != 0);
         bool model = _route->solo_isolated();
 
         /* called BEFORE the view has changed */
 
-        if (model == view) {
-                _route->set_solo_isolated (!view, this);
+        if (ev->button == 1) {
+                if (Keyboard::modifier_state_equals (ev->state, Keyboard::ModifierMask (Keyboard::PrimaryModifier|Keyboard::TertiaryModifier))) {
+
+                        if (model) {
+                                /* disable isolate for all routes */
+                                _session->set_solo_isolated (_session->get_routes(), false, Session::rt_cleanup, true);
+                        }
+
+                } else {
+                        if (model == view) {
+
+                                /* flip just this route */
+
+                                boost::shared_ptr<RouteList> rl (new RouteList);
+                                rl->push_back (_route);
+                                _session->set_solo_isolated (rl, !view, Session::rt_cleanup, true);
+                        }
+                }
         }
 
         return true;
diff --git a/libs/ardour/ardour/session.h b/libs/ardour/ardour/session.h
index b399745187..a321d1ffcc 100644
--- a/libs/ardour/ardour/session.h
+++ b/libs/ardour/ardour/session.h
@@ -583,6 +583,7 @@ class Session : public PBD::StatefulDestructible, public PBD::ScopedConnectionLi
 
 	bool soloing() const { return _non_soloed_outs_muted; }
 	bool listening() const { return _listen_cnt > 0; }
+        bool solo_isolated() const { return _solo_isolated_cnt > 0; }
 
 	static const SessionEvent::RTeventCallback rt_cleanup;
 
@@ -591,11 +592,12 @@ class Session : public PBD::StatefulDestructible, public PBD::ScopedConnectionLi
 	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_enable (boost::shared_ptr<RouteList>, bool, SessionEvent::RTeventCallback after = rt_cleanup, bool group_override = false);
+        void set_solo_isolated (boost::shared_ptr<RouteList>, bool, SessionEvent::RTeventCallback after = rt_cleanup, bool group_override = false);
 
 	PBD::Signal1<void,bool> SoloActive;
 	PBD::Signal0<void> SoloChanged;
+        PBD::Signal0<void> IsolatedChanged;
 	
-
 	/* control/master out */
 
 	boost::shared_ptr<Route> monitor_out() const { return _monitor_out; }
@@ -861,6 +863,7 @@ class Session : public PBD::StatefulDestructible, public PBD::ScopedConnectionLi
 	float                   _meter_falloff;
 	bool                    _non_soloed_outs_muted;
 	uint32_t                _listen_cnt;
+	uint32_t                _solo_isolated_cnt;
 	bool                    _writable;
 	bool                    _was_seamless;
 
@@ -1220,6 +1223,7 @@ class Session : public PBD::StatefulDestructible, public PBD::ScopedConnectionLi
 	void route_listen_changed (void *src, boost::weak_ptr<Route>);
 	void route_mute_changed (void *src);
 	void route_solo_changed (bool self_solo_change, void *src, boost::weak_ptr<Route>);
+	void route_solo_isolated_changed (void *src, boost::weak_ptr<Route>);
 	void update_route_solo_state (boost::shared_ptr<RouteList> r = boost::shared_ptr<RouteList>());
 
 	void listen_position_changed ();
@@ -1437,6 +1441,7 @@ class Session : public PBD::StatefulDestructible, public PBD::ScopedConnectionLi
 	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);
 	void rt_set_listen (boost::shared_ptr<RouteList>, bool yn, bool group_override);
+	void rt_set_solo_isolated (boost::shared_ptr<RouteList>, bool yn, bool group_override);
 	void rt_set_record_enable (boost::shared_ptr<RouteList>, bool yn, bool group_override);
 
 	/** temporary list of Diskstreams used only during load of 2.X sessions */
diff --git a/libs/ardour/route.cc b/libs/ardour/route.cc
index 48eeae7774..e5a4b01fd1 100644
--- a/libs/ardour/route.cc
+++ b/libs/ardour/route.cc
@@ -716,22 +716,27 @@ Route::set_solo_isolated (bool yn, void *src)
 
         /* XXX should we back-propagate as well? (April 2010: myself and chris goddard think not) */
 
+        bool changed = false;
+
 	if (yn) {
                 if (_solo_isolated == 0) {
                         _mute_master->set_solo_ignore (true);
+                        changed = true;
                 }
 		_solo_isolated++;
-                solo_isolated_changed (src);
 	} else {
 		if (_solo_isolated > 0) {
 			_solo_isolated--;
                         if (_solo_isolated == 0) {
                                 _mute_master->set_solo_ignore (false);
+                                changed = true;
                         }
-                        solo_isolated_changed (src);
 		}
 	}
 
+        if (changed) {
+                solo_isolated_changed (src);
+        }
 }
 
 bool
diff --git a/libs/ardour/session.cc b/libs/ardour/session.cc
index 0b796a32bf..3e22150762 100644
--- a/libs/ardour/session.cc
+++ b/libs/ardour/session.cc
@@ -1993,6 +1993,7 @@ Session::add_routes (RouteList& new_routes, bool save)
 
 		r->listen_changed.connect_same_thread (*this, boost::bind (&Session::route_listen_changed, this, _1, wpr));
 		r->solo_changed.connect_same_thread (*this, boost::bind (&Session::route_solo_changed, this, _1, _2, wpr));
+		r->solo_isolated_changed.connect_same_thread (*this, boost::bind (&Session::route_solo_isolated_changed, this, _1, wpr));
 		r->mute_changed.connect_same_thread (*this, boost::bind (&Session::route_mute_changed, this, _1));
 		r->output()->changed.connect_same_thread (*this, boost::bind (&Session::set_worst_io_latencies_x, this, _1, _2));
 		r->processors_changed.connect_same_thread (*this, boost::bind (&Session::route_processors_changed, this, _1));
@@ -2161,14 +2162,13 @@ Session::remove_route (shared_ptr<Route> route)
 			_monitor_out.reset ();
 		}
 
-		update_route_solo_state ();
-
 		/* writer goes out of scope, forces route list update */
 	}
-
+        
+        update_route_solo_state ();
 	find_current_end ();
 
-	// We need to disconnect the routes inputs and outputs
+	// We need to disconnect the route's inputs and outputs
 
 	route->input()->disconnect (0);
 	route->output()->disconnect (0);
@@ -2244,7 +2244,36 @@ Session::route_listen_changed (void* /*src*/, boost::weak_ptr<Route> wpr)
 		_listen_cnt--;
 	}
 }
+void
+Session::route_solo_isolated_changed (void* /*src*/, boost::weak_ptr<Route> wpr)
+{
+	boost::shared_ptr<Route> route = wpr.lock ();
 
+	if (!route) {
+		/* should not happen */
+		error << string_compose (_("programming error: %1"), X_("invalid route weak ptr passed to route_solo_changed")) << endmsg;
+		return;
+	}
+        
+        bool send_changed = false;
+
+        if (route->solo_isolated()) {
+                if (_solo_isolated_cnt == 0) {
+                        send_changed = true;
+                }
+                _solo_isolated_cnt++;
+        } else if (_solo_isolated_cnt > 0) {
+                _solo_isolated_cnt--;
+                if (_solo_isolated_cnt == 0) {
+                        send_changed = true;
+                }
+        }
+
+        if (send_changed) {
+                IsolatedChanged (); /* EMIT SIGNAL */
+        }
+}
+            
 void
 Session::route_solo_changed (bool self_solo_change, void* /*src*/, boost::weak_ptr<Route> wpr)
 {
@@ -2340,6 +2369,7 @@ Session::update_route_solo_state (boost::shared_ptr<RouteList> r)
 
 	bool something_soloed = false;
         uint32_t listeners = 0;
+        uint32_t isolated = 0;
 
 	if (!r) {
 		r = routes.reader();
@@ -2348,7 +2378,6 @@ Session::update_route_solo_state (boost::shared_ptr<RouteList> r)
 	for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
 		if (!(*i)->is_master() && !(*i)->is_monitor() && !(*i)->is_hidden() && (*i)->self_soloed()) {
 			something_soloed = true;
-			break;
 		}
 
                 if (!(*i)->is_hidden() && (*i)->listening()) {
@@ -2358,6 +2387,10 @@ Session::update_route_solo_state (boost::shared_ptr<RouteList> r)
                                 (*i)->set_listen (false, this);
                         }
                 }
+
+                if ((*i)->solo_isolated()) {
+                        isolated++;
+                }
 	}
 
         if (something_soloed != _non_soloed_outs_muted) {
@@ -2365,8 +2398,11 @@ Session::update_route_solo_state (boost::shared_ptr<RouteList> r)
                 SoloActive (_non_soloed_outs_muted); /* EMIT SIGNAL */
         }
 
-        if (listeners) {
-                 _listen_cnt = listeners;
+        _listen_cnt = listeners;
+
+        if (isolated != _solo_isolated_cnt) {
+                _solo_isolated_cnt = isolated;
+                IsolatedChanged (); /* EMIT SIGNAL */
         }
 }
 
diff --git a/libs/ardour/session_rtevents.cc b/libs/ardour/session_rtevents.cc
index 2befe47c16..921a6348eb 100644
--- a/libs/ardour/session_rtevents.cc
+++ b/libs/ardour/session_rtevents.cc
@@ -130,6 +130,24 @@ Session::rt_set_mute (boost::shared_ptr<RouteList> rl, bool yn, bool /*group_ove
 }
 
 void
+Session::set_solo_isolated (boost::shared_ptr<RouteList> rl, bool yn, SessionEvent::RTeventCallback after, bool group_override)
+{
+	queue_event (get_rt_event (rl, yn, after, group_override, &Session::rt_set_solo_isolated));
+}
+
+void
+Session::rt_set_solo_isolated (boost::shared_ptr<RouteList> rl, bool yn, bool /*group_override*/)
+{
+	for (RouteList::iterator i = rl->begin(); i != rl->end(); ++i) {
+		if (!(*i)->is_master() && !(*i)->is_monitor() && !(*i)->is_hidden()) {
+			(*i)->set_solo_isolated (yn, this);
+		}
+	}
+	
+	set_dirty();
+}
+
+void
 Session::set_record_enable (boost::shared_ptr<RouteList> rl, bool yn, SessionEvent::RTeventCallback after, bool group_override)
 {
 	if (!writable()) {
diff --git a/libs/ardour/session_state.cc b/libs/ardour/session_state.cc
index ae2eda81d4..a0e61d547a 100644
--- a/libs/ardour/session_state.cc
+++ b/libs/ardour/session_state.cc
@@ -170,6 +170,7 @@ Session::first_stage_init (string fullpath, string snapshot_name)
 
 	_non_soloed_outs_muted = false;
 	_listen_cnt = 0;
+	_solo_isolated_cnt = 0;
 	g_atomic_int_set (&processing_prohibited, 0);
 	_transport_speed = 0;
 	_last_transport_speed = 0;