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/*
* peak_controller_effect.cpp - PeakController effect plugin
*
* Copyright (c) 2008 Paul Giblock <drfaygo/at/gmail/dot/com>
* Copyright (c) 2009 Tobias Doerffel <tobydox/at/users.sourceforge.net>
*
* This file is part of LMMS - https://lmms.io
*
* 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 (see COPYING); if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA.
*
*/
#include "Controller.h"
#include "Song.h"
#include "PresetPreviewPlayHandle.h"
#include "PeakController.h"
#include "peak_controller_effect.h"
#include "lmms_math.h"
#include "embed.cpp"
extern "C"
{
Plugin::Descriptor PLUGIN_EXPORT peakcontrollereffect_plugin_descriptor =
{
STRINGIFY( PLUGIN_NAME ),
"Peak Controller",
QT_TRANSLATE_NOOP( "pluginBrowser",
"Plugin for controlling knobs with sound peaks" ),
"Paul Giblock <drfaygo/at/gmail.com>",
0x0100,
Plugin::Effect,
new PluginPixmapLoader( "logo" ),
NULL,
NULL
} ;
}
// We have to keep a list of all the PeakController effects so that we can save
// an peakEffect-ID to the project. This ID is referenced in the PeakController
// settings and is used to set the PeakControllerEffect pointer upon load
//QVector<PeakControllerEffect *> PeakControllerEffect::s_effects;
PeakControllerEffect::PeakControllerEffect(
Model * _parent,
const Descriptor::SubPluginFeatures::Key * _key ) :
Effect( &peakcontrollereffect_plugin_descriptor, _parent, _key ),
m_effectId( rand() ),
m_peakControls( this ),
m_lastSample( 0 ),
m_autoController( NULL )
{
m_autoController = new PeakController( Engine::getSong(), this );
if( !Engine::getSong()->isLoadingProject() && !PresetPreviewPlayHandle::isPreviewing() )
{
Engine::getSong()->addController( m_autoController );
}
PeakController::s_effects.append( this );
}
PeakControllerEffect::~PeakControllerEffect()
{
int idx = PeakController::s_effects.indexOf( this );
if( idx >= 0 )
{
PeakController::s_effects.remove( idx );
Engine::getSong()->removeController( m_autoController );
}
}
bool PeakControllerEffect::processAudioBuffer( sampleFrame * _buf,
const fpp_t _frames )
{
PeakControllerEffectControls & c = m_peakControls;
// This appears to be used for determining whether or not to continue processing
// audio with this effect
if( !isEnabled() || !isRunning() )
{
return false;
}
// RMS:
double sum = 0;
if( c.m_absModel.value() )
{
for( int i = 0; i < _frames; ++i )
{
// absolute value is achieved because the squares are > 0
sum += _buf[i][0]*_buf[i][0] + _buf[i][1]*_buf[i][1];
}
}
else
{
for( int i = 0; i < _frames; ++i )
{
// the value is absolute because of squaring,
// so we need to correct it
sum += _buf[i][0] * _buf[i][0] * sign( _buf[i][0] )
+ _buf[i][1] * _buf[i][1] * sign( _buf[i][1] );
}
}
// TODO: flipping this might cause clipping
// this will mute the output after the values were measured
if( c.m_muteModel.value() )
{
for( int i = 0; i < _frames; ++i )
{
_buf[i][0] = _buf[i][1] = 0.0f;
}
}
float curRMS = sqrt_neg( sum / _frames );
const float tres = c.m_tresholdModel.value();
const float amount = c.m_amountModel.value() * c.m_amountMultModel.value();
curRMS = qAbs( curRMS ) < tres ? 0.0f : curRMS;
m_lastSample = qBound( 0.0f, c.m_baseModel.value() + amount * curRMS, 1.0f );
return isRunning();
}
extern "C"
{
// necessary for getting instance out of shared lib
Plugin * PLUGIN_EXPORT lmms_plugin_main( Model * _parent, void * _data )
{
return new PeakControllerEffect( _parent,
static_cast<const Plugin::Descriptor::SubPluginFeatures::Key *>( _data ) );
}
}
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