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livetrax/libs/ardour/record_enable_control.cc

76 lines
2.6 KiB
C++

/*
* Copyright (C) 2016 Paul Davis <paul@linuxaudiosystems.com>
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "ardour/audioengine.h"
#include "ardour/record_enable_control.h"
#include "pbd/i18n.h"
using namespace ARDOUR;
using namespace PBD;
RecordEnableControl::RecordEnableControl (Session& session, std::string const & name, Recordable& r, Temporal::TimeDomainProvider const & tdp)
: SlavableAutomationControl (session, RecEnableAutomation, ParameterDescriptor (RecEnableAutomation),
std::shared_ptr<AutomationList>(new AutomationList(Evoral::Parameter(RecEnableAutomation), tdp)),
name)
, _recordable (r)
{
_list->set_interpolation(Evoral::ControlList::Discrete);
/* record-enable changes must be synchronized by the process cycle */
set_flag (Controllable::RealTime);
}
void
RecordEnableControl::set_value (double val, Controllable::GroupControlDisposition gcd)
{
/* Because we are marked as a RealTime control, this will queue
up the control change to be executed in a realtime context.
*/
SlavableAutomationControl::set_value (val, gcd);
}
void
RecordEnableControl::actually_set_value (double val, Controllable::GroupControlDisposition gcd)
{
if (val && !_recordable.can_be_record_enabled()) {
std::cerr << "rec-enable not allowed\n";
return;
}
SlavableAutomationControl::actually_set_value (val, gcd);
}
void
RecordEnableControl::do_pre_realtime_queue_stuff (double newval)
{
/* do the non-RT part of rec-enabling first - the RT part will be done
* on the next process cycle. This does mean that theoretically we are
* doing things provisionally on the assumption that the rec-enable
* change will work, but this had better be a solid assumption for
* other reasons.
*
* this is guaranteed to be called from a non-process thread.
*/
if (_recordable.prep_record_enabled (newval)) {
/* failed */
std::cerr << "Prep rec-enable failed\n";
}
}