start marker implemented, along with GotoZero command for old behaviour; R binding for global rec-enable now works (menu item added)

git-svn-id: svn://localhost/trunk/ardour2@376 d708f5d6-7413-0410-9779-e7cbd77b26cf

libs/ardour/ardour/location.h

@@ -51,7 +51,8 @@ class Location : public Stateful, public sigc::trackable
 		IsHidden = 0x8,
 		IsCDMarker = 0x10,
 		IsEnd = 0x20,
-		IsRangeMarker = 0x40
+		IsRangeMarker = 0x40,
+		IsStart = 0x80
 	};
 
 	Location (jack_nframes_t sample_start,
@@ -89,6 +90,7 @@ class Location : public Stateful, public sigc::trackable
 	void set_hidden (bool yn, void *src);
 	void set_cd (bool yn, void *src);
 	void set_is_end (bool yn, void* src);
+	void set_is_start (bool yn, void* src);
 
 	bool is_auto_punch ()  { return _flags & IsAutoPunch; }
 	bool is_auto_loop () { return _flags & IsAutoLoop; }
@@ -96,6 +98,7 @@ class Location : public Stateful, public sigc::trackable
 	bool is_hidden () { return _flags & IsHidden; }
 	bool is_cd_marker () { return _flags & IsCDMarker; }
 	bool is_end() { return _flags & IsEnd; }
+	bool is_start() { return _flags & IsStart; }
 	bool is_range_marker() { return _flags & IsRangeMarker; }
 
 	sigc::signal<void,Location*> name_changed;
@@ -146,6 +149,7 @@ class Locations : public Stateful, public StateManager
 	Location* auto_loop_location () const;
 	Location* auto_punch_location () const;
 	Location* end_location() const;
+	Location* start_location() const;
 
 	uint32_t num_range_markers() const;
 

libs/ardour/ardour/session.h

@@ -353,7 +353,7 @@ class Session : public sigc::trackable, public Stateful
 	void request_auto_loop (bool yn);
 	jack_nframes_t  last_transport_start() const { return _last_roll_location; }
 	void goto_end ()   { request_locate (end_location->start(), false);}
-	void goto_start () { request_locate (0, false); }
+	void goto_start () { request_locate (start_location->start(), false); }
 	void use_rf_shuttle_speed ();
 	void request_transport_speed (float speed);
 	void request_overwrite_buffer (DiskStream*);
@@ -366,6 +366,7 @@ class Session : public sigc::trackable, public Stateful
 	int remove_region_from_region_list (Region&);
 
 	jack_nframes_t current_end_frame() const { return end_location->start(); }
+	jack_nframes_t current_start_frame() const { return start_location->start(); }
 	jack_nframes_t frame_rate() const   { return _current_frame_rate; }
 	double frames_per_smpte_frame() const { return _frames_per_smpte_frame; }
 	jack_nframes_t frames_per_hour() const { return _frames_per_hour; }
@@ -1002,6 +1003,7 @@ class Session : public sigc::trackable, public Stateful
 	atomic_t                _record_status;
 	jack_nframes_t          _transport_frame;
 	Location*                end_location;
+	Location*                start_location;
 	Slave                  *_slave;
 	SlaveSource             _slave_type;
 	volatile float          _transport_speed;

libs/ardour/location.cc

@@ -154,6 +154,14 @@ Location::set_is_end (bool yn, void *src)
 	}
 }
 
+void
+Location::set_is_start (bool yn, void *src)
+{
+	if (set_flag_internal (yn, IsStart)) {
+		 FlagsChanged (this, src); /* EMIT SIGNAL */
+	}
+}
+
 void
 Location::set_auto_punch (bool yn, void *src) 
 {
@@ -659,6 +667,17 @@ Locations::end_location () const
 	return 0;
 }	
 
+Location*
+Locations::start_location () const
+{
+	for (LocationList::const_iterator i = locations.begin(); i != locations.end(); ++i) {
+		if ((*i)->is_start()) {
+			return const_cast<Location*> (*i);
+		}
+	}
+	return 0;
+}	
+
 Location*
 Locations::auto_loop_location () const
 {

libs/ardour/session_state.cc

@@ -126,6 +126,7 @@ Session::first_stage_init (string fullpath, string snapshot_name)
 	_transport_frame = 0;
 	last_stop_frame = 0;
 	end_location = new Location (0, 0, _("end"), Location::Flags ((Location::IsMark|Location::IsEnd)));
+	start_location = new Location (0, 0, _("start"), Location::Flags ((Location::IsMark|Location::IsStart)));
 	_end_location_is_free = true;
 	atomic_set (&_record_status, Disabled);
 	auto_play = false;
@@ -560,11 +561,14 @@ Session::create (bool& new_session, string* mix_template, jack_nframes_t initial
 
 	if (new_session) {
 
-		/* set an initial end point */
+		/* set initial start + end point */
+
+		start_location->set_end (0);
+		_locations.add (start_location);
 
 		end_location->set_end (initial_length);
 		_locations.add (end_location);
-
+		
 		_state_of_the_state = Clean;
 
 		if (save_state (_current_snapshot_name)) {
@@ -1551,9 +1555,17 @@ Session::set_state (const XMLNode& node)
 	if ((location = _locations.end_location()) == 0) {
 		_locations.add (end_location);
 	} else {
+		delete end_location;
 		end_location = location;
 	}
 
+	if ((location = _locations.start_location()) == 0) {
+		_locations.add (start_location);
+	} else {
+		delete start_location;
+		start_location = location;
+	}
+
 	_locations.save_state (_("initial state"));
 
 	if ((child = find_named_node (node, "EditGroups")) == 0) {