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a203ee4650
Conflicts: plugins/delay/delaycontrols.cpp plugins/delay/delaycontrolsdialog.cpp plugins/delay/delayeffect.cpp
125 lines
3.1 KiB
C++
125 lines
3.1 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 - http://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.cpp"
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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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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::Effect,
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new PluginPixmapLoader( "logo" ),
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NULL,
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NULL
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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::mixer()->processingSampleRate() );
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m_lfo = new Lfo( Engine::mixer()->processingSampleRate() );
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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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bool DelayEffect::processAudioBuffer( sampleFrame* buf, const fpp_t frames )
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{
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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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double outSum = 0.0;
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const float d = dryLevel();
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const float w = wetLevel();
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const float length = m_delayControls.m_delayTimeModel.value() * Engine::mixer()->processingSampleRate();
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const float amplitude = m_delayControls.m_lfoAmountModel.value() * Engine::mixer()->processingSampleRate();
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m_lfo->setFrequency( 1.0 / m_delayControls.m_lfoTimeModel.value() );
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m_delay->setFeedback( m_delayControls.m_feedbackModel.value() );
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sample_t dryS[2];
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for( fpp_t f = 0; f < frames; ++f )
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{
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dryS[0] = buf[f][0];
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dryS[1] = buf[f][1];
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m_delay->setLength( ( float )length + ( amplitude * ( float )m_lfo->tick() ) );
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m_delay->tick( buf[f] );
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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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outSum += buf[f][0]*buf[f][0] + buf[f][1]*buf[f][1];
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}
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checkGate( outSum / frames );
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return isRunning();
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}
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void DelayEffect::changeSampleRate()
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{
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m_lfo->setSampleRate( Engine::mixer()->processingSampleRate() );
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m_delay->setSampleRate( Engine::mixer()->processingSampleRate() );
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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 * PLUGIN_EXPORT 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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