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bfa04c987d
* Centralize standard LMMS plugin logo Previously, every single plugin would have its own copy of this image. Now, these plugins pull it from the theme. I'm not sure it's valuable for this to be themeable, but AFAIK it's the place all the other non-plugin resources are stored, so that's where it goes for now.
167 lines
4.1 KiB
C++
167 lines
4.1 KiB
C++
/*
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* flangereffect.cpp - defination of FlangerEffect class.
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*
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* Copyright (c) 2014 David French <dave/dot/french3/at/googlemail/dot/com>
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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 "FlangerEffect.h"
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#include <numbers>
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#include "Engine.h"
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#include "MonoDelay.h"
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#include "QuadratureLfo.h"
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#include "embed.h"
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#include "lmms_math.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 flanger_plugin_descriptor =
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{
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LMMS_STRINGIFY( PLUGIN_NAME ),
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"Flanger",
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QT_TRANSLATE_NOOP( "PluginBrowser", "A native flanger plugin" ),
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"Dave French <contact/dot/dave/dot/french3/at/googlemail/dot/com>",
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0x0100,
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Plugin::Type::Effect,
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new PixmapLoader("lmms-plugin-logo"),
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nullptr,
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nullptr,
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} ;
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FlangerEffect::FlangerEffect( Model *parent, const Plugin::Descriptor::SubPluginFeatures::Key *key ) :
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Effect( &flanger_plugin_descriptor, parent, key ),
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m_flangerControls( this )
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{
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m_lfo = new QuadratureLfo( Engine::audioEngine()->outputSampleRate() );
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m_lDelay = new MonoDelay( 1, Engine::audioEngine()->outputSampleRate() );
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m_rDelay = new MonoDelay( 1, Engine::audioEngine()->outputSampleRate() );
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}
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FlangerEffect::~FlangerEffect()
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{
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if(m_lDelay )
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{
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delete m_lDelay;
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}
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if( m_rDelay )
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{
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delete m_rDelay;
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}
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if( m_lfo )
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{
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delete m_lfo;
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}
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}
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Effect::ProcessStatus FlangerEffect::processImpl(SampleFrame* buf, const fpp_t frames)
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{
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const float d = dryLevel();
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const float w = wetLevel();
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const float length = m_flangerControls.m_delayTimeModel.value() * Engine::audioEngine()->outputSampleRate();
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const float noise = m_flangerControls.m_whiteNoiseAmountModel.value();
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float amplitude = m_flangerControls.m_lfoAmountModel.value() * Engine::audioEngine()->outputSampleRate();
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bool invertFeedback = m_flangerControls.m_invertFeedbackModel.value();
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m_lfo->setFrequency( 1.0/m_flangerControls.m_lfoFrequencyModel.value() );
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m_lfo->setOffset(m_flangerControls.m_lfoPhaseModel.value() / 180 * std::numbers::pi);
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m_lDelay->setFeedback( m_flangerControls.m_feedbackModel.value() );
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m_rDelay->setFeedback( m_flangerControls.m_feedbackModel.value() );
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auto dryS = std::array<sample_t, 2>{};
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for( fpp_t f = 0; f < frames; ++f )
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{
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float leftLfo;
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float rightLfo;
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buf[f][0] += fastRand(-1.f, +1.f) * noise;
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buf[f][1] += fastRand(-1.f, +1.f) * noise;
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dryS[0] = buf[f][0];
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dryS[1] = buf[f][1];
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m_lfo->tick(&leftLfo, &rightLfo);
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m_lDelay->setLength( ( float )length + amplitude * (leftLfo+1.0) );
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m_rDelay->setLength( ( float )length + amplitude * (rightLfo+1.0) );
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if(invertFeedback)
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{
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m_lDelay->tick( &buf[f][1] );
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m_rDelay->tick(&buf[f][0] );
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} else
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{
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m_lDelay->tick( &buf[f][0] );
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m_rDelay->tick( &buf[f][1] );
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}
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buf[f][0] = ( d * dryS[0] ) + ( w * buf[f][0] );
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buf[f][1] = ( d * dryS[1] ) + ( w * buf[f][1] );
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}
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return ProcessStatus::ContinueIfNotQuiet;
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}
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void FlangerEffect::changeSampleRate()
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{
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m_lfo->setSampleRate( Engine::audioEngine()->outputSampleRate() );
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m_lDelay->setSampleRate( Engine::audioEngine()->outputSampleRate() );
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m_rDelay->setSampleRate( Engine::audioEngine()->outputSampleRate() );
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}
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void FlangerEffect::restartLFO()
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{
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m_lfo->restart();
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}
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extern "C"
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{
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//needed for getting plugin 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 FlangerEffect( parent , 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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