MCP: the return of the master fader

git-svn-id: svn://localhost/ardour2/branches/3.0@11973 d708f5d6-7413-0410-9779-e7cbd77b26cf

libs/surfaces/mackie/fader.cc

@@ -17,6 +17,8 @@
 	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
 
+#include <cmath>
+
 #include "fader.h"
 #include "surface.h"
 #include "control_group.h"
@@ -50,6 +52,6 @@ Fader::update_message ()
 		return MidiByteArray();
 	}
 
-	int posi = int (0x3fff * position);
-	return MidiByteArray  (3, 0xe0 | id(), posi & 0x7f, posi >> 7);
+	int posi = lrintf (0x3fff * position);
+	return MidiByteArray  (3, 0xe0 + id(), posi & 0x7f, posi >> 7);
 }

libs/surfaces/mackie/fader.h

@@ -8,6 +8,7 @@ namespace Mackie {
 class Fader : public Control
 {
   public:
+	
 	Fader (int id, std::string name, Group & group)
 		: Control (id, name, group)
 		, position (0.0)

libs/surfaces/mackie/surface.cc

@@ -7,11 +7,13 @@
 #include "midi++/port.h"
 #include "midi++/manager.h"
 
+#include "ardour/automation_control.h"
 #include "ardour/debug.h"
 #include "ardour/route.h"
 #include "ardour/panner.h"
 #include "ardour/panner_shell.h"
 #include "ardour/rc_configuration.h"
+#include "ardour/session.h"
 
 #include "control_group.h"
 #include "surface_port.h"
@@ -36,7 +38,12 @@ using namespace Mackie;
 using ARDOUR::Route;
 using ARDOUR::Panner;
 using ARDOUR::Pannable;
-using ARDOUR::PannerShell;
+using ARDOUR::AutomationControl;
+
+#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__))
+extern PBD::EventLoop::InvalidationRecord* __invalidator (sigc::trackable& trackable, const char*, int);
+#define invalidator() __invalidator (*(MackieControlProtocol::instance()), __FILE__, __LINE__)
 
 // The MCU sysex header.4th byte Will be overwritten
 // when we get an incoming sysex that identifies
@@ -69,6 +76,10 @@ Surface::Surface (MackieControlProtocol& mcp, const std::string& device_name, ui
 		if (_mcp.device_info().has_global_controls()) {
 			init_controls ();
 		}
+
+		if (_mcp.device_info().has_master_fader()) {
+			setup_master ();
+		}
 	}
 
 	uint32_t n = _mcp.device_info().strip_cnt();
@@ -76,7 +87,7 @@ Surface::Surface (MackieControlProtocol& mcp, const std::string& device_name, ui
 	if (n) {
 		init_strips (n);
 	}
-
+	
 	connect_to_signals ();
 
 	/* wakey wakey */
@@ -194,6 +205,33 @@ Surface::init_strips (uint32_t n)
 	}
 }
 
+void
+Surface::setup_master ()
+{
+	_master_fader = dynamic_cast<Fader*> (Fader::factory (*this, 8, "master", *groups["master"]));
+	
+	boost::shared_ptr<Route> m;
+	
+	if ((m = _mcp.get_session().monitor_out()) == 0) {
+		m = _mcp.get_session().master_out();
+	} 
+	
+	if (!m) {
+		return;
+	}
+	
+	_master_fader->set_normal_control (m->gain_control());
+	m->gain_control()->Changed.connect (*this, invalidator(), ui_bind (&Surface::master_gain_changed, this), ui_context());
+}
+
+void
+Surface::master_gain_changed ()
+{
+	boost::shared_ptr<AutomationControl> ac = _master_fader->control(false);
+	float pos = ac->internal_to_interface (ac->get_value());
+	_port->write (_master_fader->set_position (pos));
+}
+
 float 
 Surface::scaled_delta (float delta, float current_speed)
 {
@@ -289,11 +327,13 @@ Surface::handle_midi_pitchbend_message (MIDI::Parser&, MIDI::pitchbend_t pb, uin
 
 	if (fader) {
 		Strip* strip = dynamic_cast<Strip*> (&fader->group());
+		float pos = (pb >> 4)/1023.0; // only the top 10 bytes are used
 		if (strip) {
-			float midi_pos = pb >> 4; // only the top 10 bytes are used
-			strip->handle_fader (*fader, midi_pos/1023.0);
+			strip->handle_fader (*fader, pos);
 		} else {
 			/* master fader */
+			fader->set_value (pos, false); // alter master gain
+			_port->write (fader->set_position (pos)); // write back value (required for servo)
 		}
 	} else {
 		DEBUG_TRACE (DEBUG::MackieControl, "fader not found\n");

libs/surfaces/mackie/surface.h

@@ -59,9 +59,9 @@ public:
 	std::map<int,Control*> controls_by_device_independent_id;
 	
 	Mackie::JogWheel* jog_wheel() const { return _jog_wheel; }
+	Fader* master_fader() const { return _master_fader; }
 
-	/// The collection of all numbered strips. No master
-	/// strip in here.
+	/// The collection of all numbered strips.
 	typedef std::vector<Strip*> Strips;
 	Strips strips;
 
@@ -147,9 +147,7 @@ public:
 	MackieControlProtocol& mcp() const { return _mcp; }
 
   protected:
-	void init_controls();
-	void init_strips (uint32_t n);
-
+	
   private:
 	MackieControlProtocol& _mcp;
 	SurfacePort*           _port;
@@ -159,11 +157,17 @@ public:
 	bool                   _active;
 	bool                   _connected;
 	Mackie::JogWheel*      _jog_wheel;
+	Fader*                 _master_fader;
 
 	void jog_wheel_state_display (Mackie::JogWheel::State state);
 	void handle_midi_sysex (MIDI::Parser&, MIDI::byte *, size_t count);
 	MidiByteArray host_connection_query (MidiByteArray& bytes);
 	MidiByteArray host_connection_confirmation (const MidiByteArray& bytes);
+
+	void init_controls();
+	void init_strips (uint32_t n);
+	void setup_master ();
+	void master_gain_changed ();
 };
 
 }