1 files changed, 247 insertions, 0 deletions
diff --git a/libs/ardour/ardour/automation_event.h b/libs/ardour/ardour/automation_event.h
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+/*
+    Copyright (C) 2002 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.
+
+    $Id$
+*/
+
+#ifndef __ardour_automation_event_h__
+#define __ardour_automation_event_h__
+
+#include <stdint.h>
+#include <list>
+#include <cmath>
+
+#include <sigc++/signal.h>
+#include <pbd/lockmonitor.h>
+#include <pbd/undo.h>
+#include <pbd/xml++.h>
+#include <ardour/ardour.h>
+#include <ardour/state_manager.h>
+
+namespace ARDOUR {
+	
+struct ControlEvent {
+    double when;
+    double value;
+    
+    ControlEvent (double w, double v)
+	    : when (w), value (v) { }
+    ControlEvent (const ControlEvent& other) 
+	    : when (other.when), value (other.value) {}
+
+    virtual ~ControlEvent() {}
+    
+//    bool operator==(const ControlEvent& other) {
+//	    return value == other.value && when == other.when;
+//    }
+
+};
+
+class AutomationList : public StateManager
+{
+  public:
+	typedef std::list<ControlEvent*> AutomationEventList;
+	typedef AutomationEventList::iterator iterator;
+	typedef AutomationEventList::const_iterator const_iterator;
+
+	AutomationList(double default_value, bool no_state = false);
+	~AutomationList();
+
+	AutomationList (const AutomationList&);
+	AutomationList (const AutomationList&, double start, double end);
+	AutomationList& operator= (const AutomationList&);
+	bool operator== (const AutomationList&);
+
+	void freeze();
+	void thaw ();
+
+	AutomationEventList::size_type size() const { return events.size(); }
+	bool empty() const { return events.empty(); }
+
+	void reset_default (double val) {
+		default_value = val;
+	}
+
+	void clear ();
+	void x_scale (double factor);
+	bool extend_to (double);
+
+	void reposition_for_rt_add (double when);
+	void rt_add (double when, double value);
+	iterator add (double when, double value, iterator, bool ignore_mode = false);
+	void add (double when, double value, bool for_loading = false);
+
+	void erase_range (double start, double end);
+	void erase (iterator);
+	void erase (iterator, iterator);
+	void move_range (iterator start, iterator end, double, double);
+	void modify (iterator, double, double);
+
+	AutomationList* cut (double, double);
+	AutomationList* copy (double, double);
+	void clear (double, double);
+
+	AutomationList* cut (iterator, iterator);
+	AutomationList* copy (iterator, iterator);
+	void clear (iterator, iterator);
+
+	bool paste (AutomationList&, double position, float times);
+
+	void set_automation_state (AutoState);
+	AutoState automation_state() const { return _state; }
+	sigc::signal<void> automation_style_changed;
+
+	void set_automation_style (AutoStyle m);
+        AutoStyle automation_style() const { return _style; }
+	sigc::signal<void> automation_state_changed;
+
+	bool automation_playback() {
+		return (_state & Play) || ((_state & Touch) && !_touching);
+	}
+	bool automation_write () {
+		return (_state & Write) || ((_state & Touch) && _touching);
+	}
+
+	void start_touch ();
+	void stop_touch ();
+	bool touching() const { return _touching; }
+
+	void set_yrange (double min, double max) {
+		min_yval = min;
+		max_yval = max;
+	}
+
+	double get_max_y() const { return max_yval; }
+	double get_min_y() const { return min_yval; }
+
+	void truncate_end (double length);
+	void truncate_start (double length);
+	
+	iterator begin() { return events.begin(); }
+	iterator end() { return events.end(); }
+
+	ControlEvent* back() { return events.back(); }
+	ControlEvent* front() { return events.front(); }
+
+	const_iterator const_begin() const { return events.begin(); }
+	const_iterator const_end() const { return events.end(); }
+
+	std::pair<AutomationList::iterator,AutomationList::iterator> control_points_adjacent (double when);
+
+	template<class T> void apply_to_points (T& obj, void (T::*method)(const AutomationList&)) {
+		LockMonitor lm (lock, __LINE__, __FILE__);
+		(obj.*method)(*this);
+	}
+
+	UndoAction get_memento () const;
+	
+	virtual void store_state (XMLNode& node) const;
+	virtual void load_state (const XMLNode&);
+
+	void set_max_xval (double);
+	double get_max_xval() const { return max_xval; }
+
+	double eval (double where) {
+		LockMonitor lm (lock, __LINE__, __FILE__);
+		return unlocked_eval (where);
+	}
+
+	double rt_safe_eval (double where, bool& ok) {
+
+		TentativeLockMonitor lm (lock, __LINE__, __FILE__);
+
+		if ((ok = lm.locked())) {
+			return unlocked_eval (where);
+		} else {
+			return 0.0;
+		}
+	}
+
+	struct TimeComparator {
+		bool operator() (const ControlEvent* a, const ControlEvent* b) { 
+			return a->when < b->when;
+		}
+	};
+
+  protected:
+	struct State : public ARDOUR::StateManager::State {
+	    AutomationEventList events;
+
+	    State (std::string why) : ARDOUR::StateManager::State (why) {}
+	};
+
+	AutomationEventList events;
+	mutable PBD::NonBlockingLock lock;
+	bool   _frozen;
+	bool    changed_when_thawed;
+	bool   _dirty;
+
+	struct LookupCache {
+	    double left;  /* leftmost x coordinate used when finding "range" */
+	    std::pair<AutomationList::iterator,AutomationList::iterator> range;
+	};
+
+	LookupCache lookup_cache;
+
+	AutoState  _state;
+	AutoStyle  _style;
+	bool  _touching;
+	bool  _new_touch;
+	double max_xval;
+	double min_yval;
+	double max_yval;
+	double default_value;
+	bool   no_state;
+
+	iterator rt_insertion_point;
+	double   rt_pos;
+
+	void maybe_signal_changed ();
+	void mark_dirty ();
+	void _x_scale (double factor);
+
+	/* called by type-specific unlocked_eval() to handle
+	   common case of 0, 1 or 2 control points.
+	*/
+
+	double shared_eval (double x);
+
+	/* called by shared_eval() to handle any case of
+	   3 or more control points.
+	*/
+
+	virtual double multipoint_eval (double x); 
+
+	/* called by locked entry point and various private
+	   locations where we already hold the lock.
+	*/
+
+	virtual double unlocked_eval (double where);
+
+	Change   restore_state (StateManager::State&);
+	StateManager::State* state_factory (std::string why) const;
+
+	virtual ControlEvent* point_factory (double,double) const;
+	virtual ControlEvent* point_factory (const ControlEvent&) const;
+
+
+	AutomationList* cut_copy_clear (double, double, int op);
+};
+
+} // namespace
+
+#endif /* __ardour_automation_event_h__ */