1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
|
/*
Copyright (C) 2016 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 __libardour_slavable_automation_control_h__
#define __libardour_slavable_automation_control_h__
#include "ardour/automation_control.h"
#include "ardour/session.h"
using namespace std;
using namespace ARDOUR;
using namespace PBD;
SlavableAutomationControl::SlavableAutomationControl(ARDOUR::Session& s,
const Evoral::Parameter& parameter,
const ParameterDescriptor& desc,
boost::shared_ptr<ARDOUR::AutomationList> l,
const std::string& name)
: AutomationControl (s, parameter, desc, l, name)
{
}
SlavableAutomationControl::~SlavableAutomationControl ()
{
}
double
SlavableAutomationControl::get_masters_value_locked () const
{
gain_t v = _desc.normal;
for (Masters::const_iterator mr = _masters.begin(); mr != _masters.end(); ++mr) {
if (_desc.toggled) {
/* if any master is enabled, the slaves are too */
if (mr->second.master()->get_value()) {
return _desc.upper;
}
} else {
/* get current master value, scale by our current ratio with that master */
v *= mr->second.master()->get_value () * mr->second.ratio();
}
}
return min (_desc.upper, v);
}
double
SlavableAutomationControl::get_value_locked() const
{
/* read or write masters lock must be held */
if (_masters.empty()) {
return Control::get_double (false, _session.transport_frame());
}
return get_masters_value_locked ();
}
/** Get the current effective `user' value based on automation state */
double
SlavableAutomationControl::get_value() const
{
bool from_list = _list && boost::dynamic_pointer_cast<AutomationList>(_list)->automation_playback();
if (!from_list) {
Glib::Threads::RWLock::ReaderLock lm (master_lock);
return get_value_locked ();
} else {
return Control::get_double (from_list, _session.transport_frame());
}
}
void
SlavableAutomationControl::add_master (boost::shared_ptr<AutomationControl> m)
{
double current_value;
double new_value;
std::pair<Masters::iterator,bool> res;
{
Glib::Threads::RWLock::WriterLock lm (master_lock);
current_value = get_value_locked ();
/* ratio will be recomputed below */
res = _masters.insert (make_pair<PBD::ID,MasterRecord> (m->id(), MasterRecord (m, 1.0)));
if (res.second) {
recompute_masters_ratios (current_value);
/* note that we bind @param m as a weak_ptr<AutomationControl>, thus
avoiding holding a reference to the control in the binding
itself.
*/
m->DropReferences.connect_same_thread (masters_connections, boost::bind (&SlavableAutomationControl::master_going_away, this, m));
/* Store the connection inside the MasterRecord, so that when we destroy it, the connection is destroyed
and we no longer hear about changes to the AutomationControl.
Note that we fix the "from_self" argument that will
be given to our own Changed signal to "false",
because the change came from the master.
*/
m->Changed.connect_same_thread (res.first->second.connection, boost::bind (&SlavableAutomationControl::master_changed, this, _1, _2));
cerr << this << enum_2_string ((AutomationType) _parameter.type()) << " now listening to Changed from " << m << endl;
}
new_value = get_value_locked ();
}
if (res.second) {
/* this will notify everyone that we're now slaved to the master */
MasterStatusChange (); /* EMIT SIGNAL */
}
if (new_value != current_value) {
/* need to do this without a writable() check in case
* the master is removed while this control is doing
* automation playback.
*/
actually_set_value (new_value, Controllable::NoGroup);
}
}
void
SlavableAutomationControl::master_changed (bool /*from_self*/, GroupControlDisposition gcd)
{
cerr << this << enum_2_string ((AutomationType)_parameter.type()) << " master changed, relay changed along\n";
/* our value has (likely) changed, but not because we were
* modified. Just the master.
*/
Changed (false, gcd); /* EMIT SIGNAL */
}
void
SlavableAutomationControl::master_going_away (boost::weak_ptr<AutomationControl> wm)
{
boost::shared_ptr<AutomationControl> m = wm.lock();
if (m) {
remove_master (m);
}
}
void
SlavableAutomationControl::remove_master (boost::shared_ptr<AutomationControl> m)
{
double current_value;
double new_value;
Masters::size_type erased = 0;
{
Glib::Threads::RWLock::WriterLock lm (master_lock);
current_value = get_value_locked ();
erased = _masters.erase (m->id());
if (erased) {
recompute_masters_ratios (current_value);
}
new_value = get_value_locked ();
}
if (erased) {
MasterStatusChange (); /* EMIT SIGNAL */
}
if (new_value != current_value) {
Changed (false, Controllable::NoGroup);
}
}
void
SlavableAutomationControl::clear_masters ()
{
double current_value;
double new_value;
bool had_masters = false;
{
Glib::Threads::RWLock::WriterLock lm (master_lock);
current_value = get_value_locked ();
if (!_masters.empty()) {
had_masters = true;
}
_masters.clear ();
new_value = get_value_locked ();
}
if (had_masters) {
MasterStatusChange (); /* EMIT SIGNAL */
}
if (new_value != current_value) {
Changed (false, Controllable::NoGroup);
}
}
bool
SlavableAutomationControl::slaved_to (boost::shared_ptr<AutomationControl> m) const
{
Glib::Threads::RWLock::ReaderLock lm (master_lock);
return _masters.find (m->id()) != _masters.end();
}
bool
SlavableAutomationControl::slaved () const
{
Glib::Threads::RWLock::ReaderLock lm (master_lock);
return !_masters.empty();
}
#endif /* __libardour_slavable_automation_control_h__ */
|
