partially-done (but compile-friendly) move of instrument info into a new backend object

git-svn-id: svn://localhost/ardour2/branches/3.0@12652 d708f5d6-7413-0410-9779-e7cbd77b26cf

libs/ardour/ardour/instrument_info.h

@@ -0,0 +1,56 @@
+/*
+    Copyright (C) 2012 Paul Davis
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#ifndef __ardour_instrument_info_h__
+#define __ardour_instrument_info_h__
+
+#include <string>
+#include <stdint.h>
+
+#include "pbd/signals.h"
+
+#include <boost/weak_ptr.hpp>
+
+namespace ARDOUR {
+
+class Processor;
+
+class InstrumentInfo {
+  public:
+    InstrumentInfo();
+    ~InstrumentInfo ();
+
+    void set_external_instrument (const std::string& model, const std::string& mode);
+    void set_internal_instrument (boost::shared_ptr<ARDOUR::Processor>);
+
+    std::string get_patch_name (uint16_t bank, uint8_t program, uint8_t channel) const;
+    std::string get_instrument_name () const;
+
+    PBD::Signal0<void> Changed;
+
+  private:
+    std::string external_instrument_model;
+    std::string external_instrument_mode;
+
+    boost::weak_ptr<ARDOUR::Processor> internal_instrument;
+};
+
+} /* namespace ARDOUR */
+
+
+#endif /* __ardour_instrument_info_h__ */

libs/ardour/ardour/route.h

@@ -41,6 +41,7 @@
 #include "pbd/destructible.h"
 
 #include "ardour/ardour.h"
+#include "ardour/instrument_info.h"
 #include "ardour/io.h"
 #include "ardour/types.h"
 #include "ardour/mute_master.h"
@@ -405,6 +406,7 @@ class Route : public SessionObject, public Automatable, public RouteGroupMember,
 	   special case not covered by this utility function.
 	*/
 	boost::shared_ptr<Processor> the_instrument() const;
+        InstrumentInfo& instrument_info() { return _instrument_info; }
 
 	void automation_snapshot (framepos_t now, bool force=false);
 	void protect_automation ();
@@ -500,6 +502,8 @@ class Route : public SessionObject, public Automatable, public RouteGroupMember,
 	DataType       _default_type;
 	FedBy          _fed_by;
 
+        InstrumentInfo _instrument_info;
+
 	virtual ChanCount input_streams () const;
 
   protected:

libs/ardour/instrument_info.cc

@@ -0,0 +1,100 @@
+/*
+    Copyright (C) 2012 Paul Davis
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "pbd/compose.h"
+
+#include "midi++/midnam_patch.h"
+
+#include "ardour/instrument_info.h"
+#include "ardour/midi_patch_manager.h"
+#include "ardour/processor.h"
+#include "ardour/rc_configuration.h"
+
+#include "i18n.h"
+
+using namespace ARDOUR;
+using std::string;
+
+InstrumentInfo::InstrumentInfo ()
+	: external_instrument_model (_("Unknown"))
+{
+}
+
+InstrumentInfo::~InstrumentInfo ()
+{
+}
+
+void
+InstrumentInfo::set_external_instrument (const string& model, const string& mode)
+{
+	external_instrument_model = model;
+	external_instrument_mode = mode;
+	internal_instrument.reset ();
+	Changed(); /* EMIT SIGNAL */
+}
+
+void
+InstrumentInfo::set_internal_instrument (boost::shared_ptr<Processor> p)
+{
+	internal_instrument = p;
+	external_instrument_model = (_("Unknown"));
+	external_instrument_mode = "";
+	Changed(); /* EMIT SIGNAL */
+}
+
+string
+InstrumentInfo::get_instrument_name () const
+{
+	boost::shared_ptr<Processor> p = internal_instrument.lock();
+
+	if (p) {
+		return p->name();
+	}
+
+	if (external_instrument_mode.empty()) {
+		return external_instrument_model;
+	} else {
+		return string_compose ("%1 (%2)", external_instrument_model, external_instrument_mode);
+	}
+}
+
+string
+InstrumentInfo::get_patch_name (uint16_t bank, uint8_t program, uint8_t channel) const
+{
+	boost::shared_ptr<Processor> p = internal_instrument.lock();
+
+	if (p) {
+		return "some plugin program";
+	}
+
+	MIDI::Name::PatchPrimaryKey patch_key (bank, program);
+	
+	boost::shared_ptr<MIDI::Name::Patch> patch =
+		MIDI::Name::MidiPatchManager::instance().find_patch (external_instrument_model, 
+								     external_instrument_mode, channel, patch_key);
+
+	if (patch) {
+		return patch->name();
+	} else {
+		/* program and bank numbers are zero-based: convert to one-based: MIDI_BP_ZERO */
+
+#define MIDI_BP_ZERO ((Config->get_first_midi_bank_is_zero())?0:1)
+
+		return string_compose ("%1 %2",program + MIDI_BP_ZERO , bank + MIDI_BP_ZERO);
+	}
+}	

libs/ardour/route.cc

@@ -1014,6 +1014,11 @@ Route::add_processor (boost::shared_ptr<Processor> processor, boost::shared_ptr<
 		_output->set_user_latency (0);
 	}
 
+	boost::shared_ptr<Processor> instr = the_instrument();
+	if (instr) {
+		_instrument_info.set_internal_instrument (instr);
+	}
+
 	processors_changed (RouteProcessorChange ()); /* EMIT SIGNAL */
 	set_processor_positions ();
 
@@ -1162,6 +1167,11 @@ Route::add_processors (const ProcessorList& others, boost::shared_ptr<Processor>
 		_output->set_user_latency (0);
 	}
 
+	boost::shared_ptr<Processor> instr = the_instrument();
+	if (instr) {
+		_instrument_info.set_internal_instrument (instr);
+	}
+
 	processors_changed (RouteProcessorChange ()); /* EMIT SIGNAL */
 	set_processor_positions ();
 
@@ -1368,6 +1378,8 @@ Route::clear_processors (Placement p)
 	processors_changed (RouteProcessorChange ()); /* EMIT SIGNAL */
 	set_processor_positions ();
 
+	_instrument_info.set_internal_instrument (boost::shared_ptr<Processor>());
+
 	if (!already_deleting) {
 		_session.clear_deletion_in_progress();
 	}
@@ -1466,6 +1478,11 @@ Route::remove_processor (boost::shared_ptr<Processor> processor, ProcessorStream
 		}
 	}
 
+	boost::shared_ptr<Processor> instr = the_instrument();
+	if (instr) {
+		_instrument_info.set_internal_instrument (instr);
+	}
+
 	processor->drop_references ();
 	processors_changed (RouteProcessorChange ()); /* EMIT SIGNAL */
 	set_processor_positions ();

libs/ardour/wscript

@@ -105,6 +105,7 @@ libardour_sources = [
         'graph.cc',
         'graphnode.cc',
         'import.cc',
+        'instrument_info.cc',
         'internal_return.cc',
         'internal_send.cc',
         'interpolation.cc',