1 /*
2 * Copyright (C) 2016 Paul Davis <paul@linuxaudiosystems.com>
3 *
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.
8 *
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.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
17 */
18
19 #include "ardour/audioengine.h"
20 #include "ardour/record_enable_control.h"
21
22 #include "pbd/i18n.h"
23
24 using namespace ARDOUR;
25 using namespace PBD;
26
RecordEnableControl(Session & session,std::string const & name,Recordable & r)27 RecordEnableControl::RecordEnableControl (Session& session, std::string const & name, Recordable& r)
28 : SlavableAutomationControl (session, RecEnableAutomation, ParameterDescriptor (RecEnableAutomation),
29 boost::shared_ptr<AutomationList>(new AutomationList(Evoral::Parameter(RecEnableAutomation))),
30 name)
31 , _recordable (r)
32 {
33 _list->set_interpolation(Evoral::ControlList::Discrete);
34
35 /* record-enable changes must be synchronized by the process cycle */
36 set_flag (Controllable::RealTime);
37 }
38
39 void
set_value(double val,Controllable::GroupControlDisposition gcd)40 RecordEnableControl::set_value (double val, Controllable::GroupControlDisposition gcd)
41 {
42 /* Because we are marked as a RealTime control, this will queue
43 up the control change to be executed in a realtime context.
44 */
45 SlavableAutomationControl::set_value (val, gcd);
46 }
47
48 void
actually_set_value(double val,Controllable::GroupControlDisposition gcd)49 RecordEnableControl::actually_set_value (double val, Controllable::GroupControlDisposition gcd)
50 {
51 if (val && !_recordable.can_be_record_enabled()) {
52 std::cerr << "rec-enable not allowed\n";
53 return;
54 }
55
56 SlavableAutomationControl::actually_set_value (val, gcd);
57 }
58
59 void
do_pre_realtime_queue_stuff(double newval)60 RecordEnableControl::do_pre_realtime_queue_stuff (double newval)
61 {
62 /* do the non-RT part of rec-enabling first - the RT part will be done
63 * on the next process cycle. This does mean that theoretically we are
64 * doing things provisionally on the assumption that the rec-enable
65 * change will work, but this had better be a solid assumption for
66 * other reasons.
67 *
68 * this is guaranteed to be called from a non-process thread.
69 */
70
71 if (_recordable.prep_record_enabled (newval)) {
72 /* failed */
73 std::cerr << "Prep rec-enable failed\n";
74 }
75 }
76