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/*
Copyright (C) 2006-2016 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.
*/
#include "ardour/dB.h"
#include "ardour/gain_control.h"
#include "ardour/session.h"
#include "i18n.h"
using namespace ARDOUR;
using namespace std;
GainControl::GainControl (Session& session, const Evoral::Parameter ¶m, boost::shared_ptr<AutomationList> al)
: AutomationControl (session, param, ParameterDescriptor(param),
al ? al : boost::shared_ptr<AutomationList> (new AutomationList (param)),
param.type() == GainAutomation ? X_("gaincontrol") : X_("trimcontrol")) {
alist()->reset_default (1.0);
lower_db = accurate_coefficient_to_dB (_desc.lower);
range_db = accurate_coefficient_to_dB (_desc.upper) - lower_db;
}
void
GainControl::set_value (double val, PBD::Controllable::GroupControlDisposition group_override)
{
if (writable()) {
_set_value (val, group_override);
}
}
void
GainControl::set_value_unchecked (double val)
{
/* used only automation playback */
_set_value (val, Controllable::NoGroup);
}
void
GainControl::_set_value (double val, Controllable::GroupControlDisposition group_override)
{
AutomationControl::set_value (std::max (std::min (val, (double)_desc.upper), (double)_desc.lower), group_override);
_session.set_dirty ();
}
double
GainControl::internal_to_interface (double v) const
{
if (_desc.type == GainAutomation) {
return gain_to_slider_position (v);
} else {
return (accurate_coefficient_to_dB (v) - lower_db) / range_db;
}
}
double
GainControl::interface_to_internal (double v) const
{
if (_desc.type == GainAutomation) {
return slider_position_to_gain (v);
} else {
return dB_to_coefficient (lower_db + v * range_db);
}
}
double
GainControl::internal_to_user (double v) const
{
return accurate_coefficient_to_dB (v);
}
double
GainControl::user_to_internal (double u) const
{
return dB_to_coefficient (u);
}
std::string
GainControl::get_user_string () const
{
char theBuf[32]; sprintf( theBuf, _("%3.1f dB"), accurate_coefficient_to_dB (get_value()));
return std::string(theBuf);
}
gain_t
GainControl::get_master_gain () const
{
Glib::Threads::Mutex::Lock sm (master_lock, Glib::Threads::TRY_LOCK);
if (sm.locked()) {
return get_master_gain_locked ();
}
return 1.0;
}
gain_t
GainControl::get_master_gain_locked () const
{
/* Master lock MUST be held */
gain_t g = 1.0;
for (Masters::const_iterator m = _masters.begin(); m != _masters.end(); ++m) {
g *= (*m)->get_value ();
}
return g;
}
void
GainControl::add_master (boost::shared_ptr<GainControl> m)
{
gain_t old_master_val;
gain_t new_master_val;
{
Glib::Threads::Mutex::Lock lm (master_lock);
old_master_val = get_master_gain_locked ();
_masters.push_back (m);
new_master_val = get_master_gain_locked ();
}
if (old_master_val != new_master_val) {
Changed(); /* EMIT SIGNAL */
}
}
void
GainControl::remove_master (boost::shared_ptr<GainControl> m)
{
gain_t old_master_val;
gain_t new_master_val;
{
Glib::Threads::Mutex::Lock lm (master_lock);
old_master_val = get_master_gain_locked ();
_masters.remove (m);
new_master_val = get_master_gain_locked ();
}
if (old_master_val != new_master_val) {
Changed(); /* EMIT SIGNAL */
}
}
void
GainControl::clear_masters ()
{
gain_t old_master_val;
gain_t new_master_val;
{
Glib::Threads::Mutex::Lock lm (master_lock);
old_master_val = get_master_gain_locked ();
_masters.clear ();
new_master_val = get_master_gain_locked ();
}
if (old_master_val != new_master_val) {
Changed(); /* EMIT SIGNAL */
}
}
bool
GainControl::slaved_to (boost::shared_ptr<GainControl> gc) const
{
Glib::Threads::Mutex::Lock lm (master_lock);
return find (_masters.begin(), _masters.end(), gc) != _masters.end();
}
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