2 Copyright (C) 2016 Paul Davis
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #ifndef __ardour_slavable_automation_control_h__
21 #define __ardour_slavable_automation_control_h__
23 #include "ardour/automation_control.h"
27 class SlavableAutomationControl : public AutomationControl
30 SlavableAutomationControl(ARDOUR::Session&,
31 const Evoral::Parameter& parameter,
32 const ParameterDescriptor& desc,
33 boost::shared_ptr<ARDOUR::AutomationList> l=boost::shared_ptr<ARDOUR::AutomationList>(),
34 const std::string& name="");
36 double get_value () const;
38 void add_master (boost::shared_ptr<AutomationControl>);
39 void remove_master (boost::shared_ptr<AutomationControl>);
40 void clear_masters ();
41 bool slaved_to (boost::shared_ptr<AutomationControl>) const;
43 double get_masters_value () const {
44 Glib::Threads::RWLock::ReaderLock lm (master_lock);
45 return get_masters_value_locked ();
48 std::vector<PBD::ID> masters () const;
50 PBD::Signal0<void> MasterStatusChange;
56 MasterRecord (boost::shared_ptr<AutomationControl> gc, double r)
61 boost::shared_ptr<AutomationControl> master() const { return _master; }
63 /* for boolean/toggled controls, we store a boolean value to
64 * indicate if this master returned true/false (1.0/0.0) from
65 * ::get_value() after its most recent change.
68 bool yn() const { return _yn; }
69 void set_yn (bool yn) { _yn = yn; }
71 /* for non-boolean/non-toggled controls, we store a ratio that
72 * connects the value of the master with the value of this
73 * slave. See comments in the source for more details on how
74 * this is computed and used.
77 double ratio () const { return _ratio; }
78 void reset_ratio (double r) { _ratio = r; }
80 PBD::ScopedConnection connection;
83 boost::shared_ptr<AutomationControl> _master;
90 mutable Glib::Threads::RWLock master_lock;
91 typedef std::map<PBD::ID,MasterRecord> Masters;
93 PBD::ScopedConnectionList masters_connections;
95 void master_going_away (boost::weak_ptr<AutomationControl>);
96 double get_value_locked() const;
97 void actually_set_value (double val, PBD::Controllable::GroupControlDisposition group_override);
98 void update_boolean_masters_records (boost::shared_ptr<AutomationControl>);
99 int32_t get_boolean_masters () const;
101 virtual void master_changed (bool from_self, GroupControlDisposition gcd, boost::shared_ptr<AutomationControl>);
102 virtual void recompute_masters_ratios (double val) { /* do nothing by default */}
103 virtual double get_masters_value_locked () const;
104 virtual void pre_remove_master (boost::shared_ptr<AutomationControl>) {}
105 virtual void post_add_master (boost::shared_ptr<AutomationControl>) {}
110 } // namespace ARDOUR
112 #endif /* __ardour_slavable_automation_control_h__ */