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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.
168 lines
4.6 KiB
C++
168 lines
4.6 KiB
C++
/*
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* delayeffect.cpp - definition of the DelayEffect class. The Delay Plugin
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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 "DelayEffect.h"
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#include "Engine.h"
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#include "embed.h"
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#include "Lfo.h"
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#include "lmms_math.h"
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#include "plugin_export.h"
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#include "StereoDelay.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 delay_plugin_descriptor =
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{
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LMMS_STRINGIFY( PLUGIN_NAME ),
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"Delay",
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QT_TRANSLATE_NOOP( "PluginBrowser", "A native delay 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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DelayEffect::DelayEffect( Model* parent, const Plugin::Descriptor::SubPluginFeatures::Key* key ) :
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Effect( &delay_plugin_descriptor, parent, key ),
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m_delayControls( this )
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{
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m_delay = 0;
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m_delay = new StereoDelay( 20, Engine::audioEngine()->outputSampleRate() );
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m_lfo = new Lfo( Engine::audioEngine()->outputSampleRate() );
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m_outGain = 1.0;
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}
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DelayEffect::~DelayEffect()
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{
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if( m_delay )
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{
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delete m_delay;
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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 DelayEffect::processImpl(SampleFrame* buf, const fpp_t frames)
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{
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const float sr = Engine::audioEngine()->outputSampleRate();
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const float d = dryLevel();
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const float w = wetLevel();
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SampleFrame peak;
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float length = m_delayControls.m_delayTimeModel.value();
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float amplitude = m_delayControls.m_lfoAmountModel.value() * sr;
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float lfoTime = 1.0 / m_delayControls.m_lfoTimeModel.value();
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float feedback = m_delayControls.m_feedbackModel.value();
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ValueBuffer *lengthBuffer = m_delayControls.m_delayTimeModel.valueBuffer();
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ValueBuffer *feedbackBuffer = m_delayControls.m_feedbackModel.valueBuffer();
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ValueBuffer *lfoTimeBuffer = m_delayControls.m_lfoTimeModel.valueBuffer();
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ValueBuffer *lfoAmountBuffer = m_delayControls.m_lfoAmountModel.valueBuffer();
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int lengthInc = lengthBuffer ? 1 : 0;
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int amplitudeInc = lfoAmountBuffer ? 1 : 0;
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int lfoTimeInc = lfoTimeBuffer ? 1 : 0;
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int feedbackInc = feedbackBuffer ? 1 : 0;
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float *lengthPtr = lengthBuffer ? &( lengthBuffer->values()[ 0 ] ) : &length;
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float *amplitudePtr = lfoAmountBuffer ? &( lfoAmountBuffer->values()[ 0 ] ) : &litude;
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float *lfoTimePtr = lfoTimeBuffer ? &( lfoTimeBuffer->values()[ 0 ] ) : &lfoTime;
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float *feedbackPtr = feedbackBuffer ? &( feedbackBuffer->values()[ 0 ] ) : &feedback;
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if( m_delayControls.m_outGainModel.isValueChanged() )
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{
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m_outGain = dbfsToAmp( m_delayControls.m_outGainModel.value() );
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}
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for (fpp_t f = 0; f < frames; ++f)
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{
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auto& currentFrame = buf[f];
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const auto dryS = currentFrame;
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// Prepare delay for current sample
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m_delay->setFeedback( *feedbackPtr );
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m_lfo->setFrequency( *lfoTimePtr );
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m_currentLength = static_cast<int>(*lengthPtr * Engine::audioEngine()->outputSampleRate());
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m_delay->setLength( m_currentLength + ( *amplitudePtr * ( float )m_lfo->tick() ) );
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// Process the wet signal
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m_delay->tick( currentFrame );
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currentFrame *= m_outGain;
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// Calculate peak of wet signal
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peak = peak.absMax(currentFrame);
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// Dry/wet mix
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currentFrame = dryS * d + currentFrame * w;
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lengthPtr += lengthInc;
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amplitudePtr += amplitudeInc;
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lfoTimePtr += lfoTimeInc;
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feedbackPtr += feedbackInc;
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}
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m_delayControls.m_outPeakL = peak.left();
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m_delayControls.m_outPeakR = peak.right();
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return ProcessStatus::ContinueIfNotQuiet;
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}
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void DelayEffect::changeSampleRate()
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{
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m_lfo->setSampleRate( Engine::audioEngine()->outputSampleRate() );
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m_delay->setSampleRate( Engine::audioEngine()->outputSampleRate() );
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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 DelayEffect( 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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