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96df9b006c
* Prefix `STRINGIFY` and `STR` macros with `LMMS_` * Fix include guard macro names * Remove unused macros
166 lines
4.2 KiB
C++
166 lines
4.2 KiB
C++
/*
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* PeakControllerEffect.cpp - PeakController effect plugin
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*
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* Copyright (c) 2008 Paul Giblock <drfaygo/at/gmail/dot/com>
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* Copyright (c) 2009 Tobias Doerffel <tobydox/at/users.sourceforge.net>
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*
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* This file is part of LMMS - https://lmms.io
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program (see COPYING); if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA.
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*
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*/
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#include "Song.h"
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#include "PresetPreviewPlayHandle.h"
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#include "PeakController.h"
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#include "PeakControllerEffect.h"
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#include "lmms_math.h"
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#include "embed.h"
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#include "plugin_export.h"
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namespace lmms
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{
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extern "C"
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{
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Plugin::Descriptor PLUGIN_EXPORT peakcontrollereffect_plugin_descriptor =
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{
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LMMS_STRINGIFY( PLUGIN_NAME ),
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"Peak Controller",
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QT_TRANSLATE_NOOP( "PluginBrowser",
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"Plugin for controlling knobs with sound peaks" ),
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"Paul Giblock <drfaygo/at/gmail.com>",
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0x0100,
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Plugin::Effect,
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new PluginPixmapLoader("logo"),
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nullptr,
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nullptr,
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} ;
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}
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// We have to keep a list of all the PeakController effects so that we can save
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// an peakEffect-ID to the project. This ID is referenced in the PeakController
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// settings and is used to set the PeakControllerEffect pointer upon load
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//QVector<PeakControllerEffect *> PeakControllerEffect::s_effects;
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PeakControllerEffect::PeakControllerEffect(
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Model * _parent,
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const Descriptor::SubPluginFeatures::Key * _key ) :
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Effect( &peakcontrollereffect_plugin_descriptor, _parent, _key ),
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m_effectId( rand() ),
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m_peakControls( this ),
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m_lastSample( 0 ),
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m_autoController( nullptr )
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{
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m_autoController = new PeakController( Engine::getSong(), this );
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if( !Engine::getSong()->isLoadingProject() && !PresetPreviewPlayHandle::isPreviewing() )
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{
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Engine::getSong()->addController( m_autoController );
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}
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PeakController::s_effects.append( this );
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}
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PeakControllerEffect::~PeakControllerEffect()
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{
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int idx = PeakController::s_effects.indexOf( this );
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if( idx >= 0 )
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{
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PeakController::s_effects.remove( idx );
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Engine::getSong()->removeController( m_autoController );
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}
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}
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bool PeakControllerEffect::processAudioBuffer( sampleFrame * _buf,
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const fpp_t _frames )
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{
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PeakControllerEffectControls & c = m_peakControls;
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// This appears to be used for determining whether or not to continue processing
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// audio with this effect
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if( !isEnabled() || !isRunning() )
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{
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return false;
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}
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// RMS:
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double sum = 0;
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if( c.m_absModel.value() )
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{
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for( int i = 0; i < _frames; ++i )
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{
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// absolute value is achieved because the squares are > 0
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sum += _buf[i][0]*_buf[i][0] + _buf[i][1]*_buf[i][1];
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}
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}
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else
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{
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for( int i = 0; i < _frames; ++i )
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{
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// the value is absolute because of squaring,
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// so we need to correct it
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sum += _buf[i][0] * _buf[i][0] * sign( _buf[i][0] )
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+ _buf[i][1] * _buf[i][1] * sign( _buf[i][1] );
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}
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}
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// TODO: flipping this might cause clipping
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// this will mute the output after the values were measured
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if( c.m_muteModel.value() )
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{
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for( int i = 0; i < _frames; ++i )
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{
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_buf[i][0] = _buf[i][1] = 0.0f;
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}
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}
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float curRMS = sqrt_neg( sum / _frames );
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const float tres = c.m_tresholdModel.value();
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const float amount = c.m_amountModel.value() * c.m_amountMultModel.value();
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curRMS = qAbs( curRMS ) < tres ? 0.0f : curRMS;
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m_lastSample = qBound( 0.0f, c.m_baseModel.value() + amount * curRMS, 1.0f );
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return isRunning();
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}
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extern "C"
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{
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// necessary for getting instance out of shared lib
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PLUGIN_EXPORT Plugin * lmms_plugin_main( Model * _parent, void * _data )
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{
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return new PeakControllerEffect( _parent,
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static_cast<const Plugin::Descriptor::SubPluginFeatures::Key *>( _data ) );
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}
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}
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} // namespace lmms
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