Merge branch 'windows' of git.ardour.org:ardour/ardour into windows

5 files changed, 131 insertions, 111 deletions

diff --git a/libs/ardour/ardour/audio_backend.h b/libs/ardour/ardour/audio_backend.h
index 4d57f0b43d..9052acd530 100644
--- a/libs/ardour/ardour/audio_backend.h
+++ b/libs/ardour/ardour/audio_backend.h
@@ -223,6 +223,11 @@ class AudioBackend : public PortEngine {
     virtual uint32_t     systemic_input_latency () const = 0;
     virtual uint32_t     systemic_output_latency () const = 0;
 
+    /** override this if this implementation returns true from
+     * requires_driver_selection()
+     */
+    virtual std::string  driver_name() const { return std::string(); }
+
     /** Return the name of a control application for the 
      * selected/in-use device. If no such application exists,
      * or if no device has been selected or is in-use,
diff --git a/libs/ardour/ardour/session.h b/libs/ardour/ardour/session.h
index d0cd3fa06e..3fa9fbcb28 100644
--- a/libs/ardour/ardour/session.h
+++ b/libs/ardour/ardour/session.h
@@ -1071,7 +1071,6 @@ class Session : public PBD::StatefulDestructible, public PBD::ScopedConnectionLi
 	boost::scoped_ptr<SessionDirectory> _session_dir;
 
 	void hookup_io ();
-        int when_engine_running ();
 	void graph_reordered ();
 
 	/** current snapshot name, without the .ardour suffix */
@@ -1137,8 +1136,10 @@ class Session : public PBD::StatefulDestructible, public PBD::ScopedConnectionLi
 	void             auto_loop_changed (Location *);
 	void             auto_loop_declick_range (Location *, framepos_t &, framepos_t &);
 
+        int  ensure_engine (uint32_t desired_sample_rate);
 	void pre_engine_init (std::string path);
 	int  post_engine_init ();
+        int  immediately_post_engine ();
 	void remove_empty_sounds ();
 
 	void setup_midi_control ();
@@ -1521,13 +1522,6 @@ class Session : public PBD::StatefulDestructible, public PBD::ScopedConnectionLi
 		float opt
 		);
 
-	/* number of hardware ports we're using,
-	   based on max (requested,available)
-	*/
-
-	ChanCount n_physical_outputs;
-	ChanCount n_physical_inputs;
-
 	int find_all_sources (std::string path, std::set<std::string>& result);
 	int find_all_sources_across_snapshots (std::set<std::string>& result, bool exclude_this_snapshot);
 
@@ -1624,7 +1618,6 @@ class Session : public PBD::StatefulDestructible, public PBD::ScopedConnectionLi
     void setup_ltc ();
     void setup_click ();
     void setup_bundles ();
-    int  ensure_engine (uint32_t desired_sample_rate);
 };
 
 } // namespace ARDOUR
diff --git a/libs/ardour/audioengine.cc b/libs/ardour/audioengine.cc
index ebebac5774..05fc469c77 100644
--- a/libs/ardour/audioengine.cc
+++ b/libs/ardour/audioengine.cc
@@ -1037,12 +1037,22 @@ AudioEngine::start_latency_detection ()
 	delete _mtdm;
 	_mtdm = 0;
 
+	/* find the ports we will connect to */
+
+	PortEngine::PortHandle* out = pe.get_port_by_name (_latency_output_name);
+	PortEngine::PortHandle* in = pe.get_port_by_name (_latency_input_name);
+
+	if (!out || !in) {
+		return;
+	}
+
 	/* create the ports we will use to read/write data */
 	
 	if ((_latency_output_port = pe.register_port ("latency_out", DataType::AUDIO, IsOutput)) == 0) {
 		return;
 	}
 	if (pe.connect (_latency_output_port, _latency_output_name)) {
+		pe.unregister_port (_latency_output_port);
 		return;
 	}
 
@@ -1058,9 +1068,9 @@ AudioEngine::start_latency_detection ()
 
 	LatencyRange lr;
 	_latency_signal_latency = 0;
-	lr = pe.get_latency_range (_latency_input_port, false);
+	lr = pe.get_latency_range (in, false);
 	_latency_signal_latency = lr.max;
-	lr = pe.get_latency_range (_latency_output_port, true);
+	lr = pe.get_latency_range (out, true);
 	_latency_signal_latency += lr.max;
 
 	/* all created and connected, lets go */
@@ -1076,9 +1086,14 @@ AudioEngine::stop_latency_detection ()
 {
 	_measuring_latency = false;
 
-	port_engine().unregister_port (_latency_output_port);
-	port_engine().unregister_port (_latency_input_port);
-	
+	if (_latency_output_port) {
+		port_engine().unregister_port (_latency_output_port);
+		_latency_output_port = 0;
+	}
+	if (_latency_input_port) {
+		port_engine().unregister_port (_latency_input_port);
+		_latency_input_port = 0;
+	}
 	if (_started_for_latency) {
 		stop ();
 	}
diff --git a/libs/ardour/session.cc b/libs/ardour/session.cc
index 4be42c769a..2a081086d4 100644
--- a/libs/ardour/session.cc
+++ b/libs/ardour/session.cc
@@ -258,17 +258,26 @@ Session::Session (AudioEngine &eng,
 	, _suspend_timecode_transmission (0)
 	,  _speakers (new Speakers)
 	, ignore_route_processor_changes (false)
+	, _midi_ports (0)
+	, _mmc (0)
 {
 	uint32_t sr = 0;
 
 	pre_engine_init (fullpath);
 	
 	if (_is_new) {
+		if (ensure_engine (sr)) {
+			destroy ();
+			throw failed_constructor ();
+		}
+
 		if (create (mix_template, bus_profile)) {
 			destroy ();
 			throw failed_constructor ();
 		}
+
 	} else {
+
 		if (load_state (_current_snapshot_name)) {
 			throw failed_constructor ();
 		}
@@ -284,11 +293,11 @@ Session::Session (AudioEngine &eng,
 				sr = atoi (prop->value());
 			}
 		}
-	}
 
-	if (ensure_engine (sr)) {
-		destroy ();
-		throw failed_constructor ();
+		if (ensure_engine (sr)) {
+			destroy ();
+			throw failed_constructor ();
+		}
 	}
 
 	if (post_engine_init ()) {
@@ -361,6 +370,50 @@ Session::ensure_engine (uint32_t desired_sample_rate)
 		return -1;
 	}
 
+	return immediately_post_engine ();
+
+}
+
+int
+Session::immediately_post_engine ()
+{
+	/* Do various initializations that should take place directly after we
+	 * know that the engine is running, but before we either create a
+	 * session or set state for an existing one.
+	 */
+	 
+	if (how_many_dsp_threads () > 1) {
+		/* For now, only create the graph if we are using >1 DSP threads, as
+		   it is a bit slower than the old code with 1 thread.
+		*/
+		_process_graph.reset (new Graph (*this));
+	}
+
+	/* every time we reconnect, recompute worst case output latencies */
+
+	_engine.Running.connect_same_thread (*this, boost::bind (&Session::initialize_latencies, this));
+
+	if (synced_to_jack()) {
+		_engine.transport_stop ();
+	}
+
+	if (config.get_jack_time_master()) {
+		_engine.transport_locate (_transport_frame);
+	}
+
+	try {
+		BootMessage (_("Set up LTC"));
+		setup_ltc ();
+		BootMessage (_("Set up Click"));
+		setup_click ();
+		BootMessage (_("Set up standard connections"));
+		setup_bundles ();
+	}
+
+	catch (failed_constructor& err) {
+		return -1;
+	}
+
 	return 0;
 }
 
@@ -474,9 +527,9 @@ Session::destroy ()
 	/* not strictly necessary, but doing it here allows the shared_ptr debugging to work */
 	playlists.reset ();
 
-	delete _mmc;
-	delete _midi_ports;
-	delete _locations;
+	delete _mmc; _mmc = 0;
+	delete _midi_ports; _midi_ports = 0;
+	delete _locations; _locations = 0;
 
 	DEBUG_TRACE (DEBUG::Destruction, "Session::destroy() done\n");
 
@@ -683,81 +736,6 @@ Session::setup_bundles ()
 
 }
 
-int
-Session::when_engine_running ()
-{
-	/* every time we reconnect, recompute worst case output latencies */
-
-	_engine.Running.connect_same_thread (*this, boost::bind (&Session::initialize_latencies, this));
-
-	if (synced_to_jack()) {
-		_engine.transport_stop ();
-	}
-
-	if (config.get_jack_time_master()) {
-		_engine.transport_locate (_transport_frame);
-	}
-
-
-	try {
-		BootMessage (_("Set up LTC"));
-		setup_ltc ();
-		BootMessage (_("Set up Click"));
-		setup_click ();
-		BootMessage (_("Set up standard connections"));
-		setup_bundles ();
-	}
-
-	catch (failed_constructor& err) {
-		return -1;
-	}
-
-	BootMessage (_("Setup signal flow and plugins"));
-
-	/* Reset all panners */
-
-	Delivery::reset_panners ();
-
-	/* this will cause the CPM to instantiate any protocols that are in use
-	 * (or mandatory), which will pass it this Session, and then call
-	 * set_state() on each instantiated protocol to match stored state.
-	 */
-
-	ControlProtocolManager::instance().set_session (this);
-
-	/* This must be done after the ControlProtocolManager set_session above,
-	   as it will set states for ports which the ControlProtocolManager creates.
-	*/
-
-	// XXX set state of MIDI::Port's
-	// MidiPortManager::instance()->set_port_states (Config->midi_port_states ());
-
-	/* And this must be done after the MIDI::Manager::set_port_states as
-	 * it will try to make connections whose details are loaded by set_port_states.
-	 */
-
-	hookup_io ();
-
-	/* Let control protocols know that we are now all connected, so they
-	 * could start talking to surfaces if they want to.
-	 */
-
-	ControlProtocolManager::instance().midi_connectivity_established ();
-
-	if (_is_new && !no_auto_connect()) {
-		Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock());
-		auto_connect_master_bus ();
-	}
-
-	_state_of_the_state = StateOfTheState (_state_of_the_state & ~(CannotSave|Dirty));
-
-        /* update latencies */
-
-        initialize_latencies ();
-
-	return 0;
-}
-
 void
 Session::auto_connect_master_bus ()
 {
@@ -917,14 +895,14 @@ Session::add_monitor_section ()
 			
 			/* Monitor bus is audio only */
 
-			uint32_t mod = n_physical_outputs.get (DataType::AUDIO);
-			uint32_t limit = _monitor_out->n_outputs().get (DataType::AUDIO);
 			vector<string> outputs[DataType::num_types];
 
 			for (uint32_t i = 0; i < DataType::num_types; ++i) {
 				_engine.get_physical_outputs (DataType (DataType::Symbol (i)), outputs[i]);
 			}
-			
+
+			uint32_t mod = outputs[DataType::AUDIO].size();
+			uint32_t limit = _monitor_out->n_outputs().get (DataType::AUDIO);
 			
 			if (mod != 0) {
 				
diff --git a/libs/ardour/session_state.cc b/libs/ardour/session_state.cc
index 2d91bdd4c2..1a605d2fd5 100644
--- a/libs/ardour/session_state.cc
+++ b/libs/ardour/session_state.cc
@@ -211,16 +211,6 @@ Session::post_engine_init ()
 	set_block_size (_engine.samples_per_cycle());
 	set_frame_rate (_engine.sample_rate());
 
-	if (how_many_dsp_threads () > 1) {
-		/* For now, only create the graph if we are using >1 DSP threads, as
-		   it is a bit slower than the old code with 1 thread.
-		*/
-		_process_graph.reset (new Graph (*this));
-	}
-
-	n_physical_outputs = _engine.n_physical_outputs ();
-	n_physical_inputs =  _engine.n_physical_inputs ();
-
 	BootMessage (_("Using configuration"));
 
 	_midi_ports = new MidiPortManager;
@@ -281,8 +271,47 @@ Session::post_engine_init ()
 		Config->map_parameters (ff);
 		config.map_parameters (ft);
 
-		when_engine_running ();
-
+		/* Reset all panners */
+		
+		Delivery::reset_panners ();
+		
+		/* this will cause the CPM to instantiate any protocols that are in use
+		 * (or mandatory), which will pass it this Session, and then call
+		 * set_state() on each instantiated protocol to match stored state.
+		 */
+		
+		ControlProtocolManager::instance().set_session (this);
+		
+		/* This must be done after the ControlProtocolManager set_session above,
+		   as it will set states for ports which the ControlProtocolManager creates.
+		*/
+		
+		// XXX set state of MIDI::Port's
+		// MidiPortManager::instance()->set_port_states (Config->midi_port_states ());
+		
+		/* And this must be done after the MIDI::Manager::set_port_states as
+		 * it will try to make connections whose details are loaded by set_port_states.
+		 */
+		
+		hookup_io ();
+		
+		/* Let control protocols know that we are now all connected, so they
+		 * could start talking to surfaces if they want to.
+		 */
+		
+		ControlProtocolManager::instance().midi_connectivity_established ();
+		
+		if (_is_new && !no_auto_connect()) {
+			Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock());
+			auto_connect_master_bus ();
+		}
+		
+		_state_of_the_state = StateOfTheState (_state_of_the_state & ~(CannotSave|Dirty));
+		
+		/* update latencies */
+		
+		initialize_latencies ();
+		
 		_locations->changed.connect_same_thread (*this, boost::bind (&Session::locations_changed, this));
 		_locations->added.connect_same_thread (*this, boost::bind (&Session::locations_added, this, _1));