Paul Davis
1b2a64c391
master(s) value now just scales the control's own value; a trivial bit of math at assign/deassign ensures that values do not change during add/remove master operations
103 lines
2.8 KiB
C++
103 lines
2.8 KiB
C++
/*
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Copyright (C) 2006-2016 Paul Davis
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2 of the License, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <cmath>
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#include "pbd/convert.h"
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#include "pbd/strsplit.h"
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#include "ardour/dB.h"
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#include "ardour/gain_control.h"
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#include "ardour/session.h"
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#include "ardour/vca.h"
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#include "ardour/vca_manager.h"
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#include "pbd/i18n.h"
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using namespace ARDOUR;
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using namespace std;
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GainControl::GainControl (Session& session, const Evoral::Parameter ¶m, boost::shared_ptr<AutomationList> al)
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: SlavableAutomationControl (session, param, ParameterDescriptor(param),
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al ? al : boost::shared_ptr<AutomationList> (new AutomationList (param)),
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param.type() == GainAutomation ? X_("gaincontrol") : X_("trimcontrol"),
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Controllable::GainLike)
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{
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alist()->reset_default (1.0);
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lower_db = accurate_coefficient_to_dB (_desc.lower);
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range_db = accurate_coefficient_to_dB (_desc.upper) - lower_db;
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}
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double
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GainControl::internal_to_interface (double v) const
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{
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if (_desc.type == GainAutomation) {
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return gain_to_slider_position (v);
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} else {
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return (accurate_coefficient_to_dB (v) - lower_db) / range_db;
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}
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}
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double
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GainControl::interface_to_internal (double v) const
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{
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if (_desc.type == GainAutomation) {
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return slider_position_to_gain (v);
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} else {
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return dB_to_coefficient (lower_db + v * range_db);
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}
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}
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double
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GainControl::internal_to_user (double v) const
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{
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return accurate_coefficient_to_dB (v);
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}
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double
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GainControl::user_to_internal (double u) const
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{
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return dB_to_coefficient (u);
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}
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std::string
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GainControl::get_user_string () const
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{
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char theBuf[32]; sprintf( theBuf, _("%3.1f dB"), accurate_coefficient_to_dB (get_value()));
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return std::string(theBuf);
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}
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void
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GainControl::inc_gain (gain_t factor)
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{
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/* To be used ONLY when doing group-relative gain adjustment, from
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* ControlGroup::set_group_values().
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*/
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const float desired_gain = user_double();
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if (fabsf (desired_gain) < GAIN_COEFF_SMALL) {
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// really?! what's the idea here?
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actually_set_value (0.000001f + (0.000001f * factor), Controllable::ForGroup);
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} else {
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actually_set_value (desired_gain + (desired_gain * factor), Controllable::ForGroup);
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}
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}
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