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/*
* Copyright (C) 2016-2017 Paul Davis <paul@linuxaudiosystems.com>
* Copyright (C) 2017 Robin Gareus <robin@gareus.org>
*
* 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 <cmath>
#include "pbd/convert.h"
#include "pbd/strsplit.h"
#include "evoral/Curve.h"
#include "ardour/dB.h"
#include "ardour/gain_control.h"
#include "ardour/session.h"
#include "ardour/vca.h"
#include "ardour/vca_manager.h"
#include "pbd/i18n.h"
using namespace ARDOUR;
using namespace std;
GainControl::GainControl (Session& session, const Evoral::Parameter ¶m, boost::shared_ptr<AutomationList> al)
: SlavableAutomationControl (session, param, ParameterDescriptor(param),
al ? al : boost::shared_ptr<AutomationList> (new AutomationList (param)),
(param.type() == GainAutomation || param.type() == BusSendLevel) ? X_("gaincontrol") : X_("trimcontrol"),
Controllable::GainLike)
{
}
void
GainControl::inc_gain (gain_t factor)
{
/* To be used ONLY when doing group-relative gain adjustment, from
* ControlGroup::set_group_values().
*/
const float desired_gain = get_value ();
if (fabsf (desired_gain) < GAIN_COEFF_SMALL) {
// really?! what's the idea here?
actually_set_value (0.000001f + (0.000001f * factor), Controllable::ForGroup);
} else {
actually_set_value (desired_gain + (desired_gain * factor), Controllable::ForGroup);
}
}
void
GainControl::post_add_master (boost::shared_ptr<AutomationControl> m)
{
if (m->get_value() == 0) {
/* master is at -inf, which forces this ctrl to -inf on assignment */
Changed (false, Controllable::NoGroup); /* EMIT SIGNAL */
}
}
bool
GainControl::get_masters_curve_locked (samplepos_t start, samplepos_t end, float* vec, samplecnt_t veclen) const
{
if (_masters.empty()) {
return list()->curve().rt_safe_get_vector (start, end, vec, veclen);
}
for (samplecnt_t i = 0; i < veclen; ++i) {
vec[i] = 1.f;
}
return SlavableAutomationControl::masters_curve_multiply (start, end, vec, veclen);
}
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