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c747c7a9ee
This was done to increase performance when sample exactness is not in use. This was a consern becasue of the 2 extra function calls each frame introduced with SA.
173 lines
4.1 KiB
C++
173 lines
4.1 KiB
C++
/*
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* BassBooster.cpp - bass booster effect plugin
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*
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* Copyright (c) 2006-2014 Tobias Doerffel <tobydox/at/users.sourceforge.net>
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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 "BassBooster.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 bassbooster_plugin_descriptor =
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{
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STRINGIFY( PLUGIN_NAME ),
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"BassBooster",
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QT_TRANSLATE_NOOP( "pluginBrowser", "Boost your bass the fast and simple way" ),
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"Tobias Doerffel <tobydox/at/users.sf.net>",
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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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}
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BassBoosterEffect::BassBoosterEffect( Model* parent, const Descriptor::SubPluginFeatures::Key* key ) :
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Effect( &bassbooster_plugin_descriptor, parent, key ),
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m_frequencyChangeNeeded( false ),
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m_bbFX( DspEffectLibrary::FastBassBoost( 70.0f, 1.0f, 2.8f ) ),
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m_bbControls( this )
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{
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changeFrequency();
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changeGain();
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changeRatio();
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}
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BassBoosterEffect::~BassBoosterEffect()
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{
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}
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bool BassBoosterEffect::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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// check out changed controls
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if( m_frequencyChangeNeeded || m_bbControls.m_freqModel.isValueChanged() )
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{
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changeFrequency();
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m_frequencyChangeNeeded = false;
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}
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if( m_bbControls.m_gainModel.isValueChanged() ) { changeGain(); }
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if( m_bbControls.m_ratioModel.isValueChanged() ) { changeRatio(); }
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float gain = m_bbControls.m_gainModel.value();
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ValueBuffer *gainBuffer = m_bbControls.m_gainModel.valueBuffer();
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int gainInc = gainBuffer ? 1 : 0;
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float *gainPtr = gainBuffer ? &( gainBuffer->values()[ 0 ] ) : &gain;
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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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if( gainBuffer )
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{
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//process period using sample exact data
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for( fpp_t f = 0; f < frames; ++f )
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{
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m_bbFX.leftFX().setGain( *gainPtr );
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m_bbFX.rightFX().setGain( *gainPtr );
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outSum += buf[f][0]*buf[f][0] + buf[f][1]*buf[f][1];
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sample_t s[2] = { buf[f][0], buf[f][1] };
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m_bbFX.nextSample( s[0], s[1] );
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buf[f][0] = d * buf[f][0] + w * s[0];
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buf[f][1] = d * buf[f][1] + w * s[1];
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gainPtr += gainInc;
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}
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} else
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{
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//process period without sample exact data
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m_bbFX.leftFX().setGain( *gainPtr );
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m_bbFX.rightFX().setGain( *gainPtr );
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for( fpp_t f = 0; f < frames; ++f )
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{
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outSum += buf[f][0]*buf[f][0] + buf[f][1]*buf[f][1];
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sample_t s[2] = { buf[f][0], buf[f][1] };
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m_bbFX.nextSample( s[0], s[1] );
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buf[f][0] = d * buf[f][0] + w * s[0];
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buf[f][1] = d * buf[f][1] + w * s[1];
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}
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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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inline void BassBoosterEffect::changeFrequency()
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{
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const sample_t fac = Engine::mixer()->processingSampleRate() / 44100.0f;
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m_bbFX.leftFX().setFrequency( m_bbControls.m_freqModel.value() * fac );
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m_bbFX.rightFX().setFrequency( m_bbControls.m_freqModel.value() * fac );
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}
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inline void BassBoosterEffect::changeGain()
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{
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m_bbFX.leftFX().setGain( m_bbControls.m_gainModel.value() );
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m_bbFX.rightFX().setGain( m_bbControls.m_gainModel.value() );
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}
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inline void BassBoosterEffect::changeRatio()
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{
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m_bbFX.leftFX().setRatio( m_bbControls.m_ratioModel.value() );
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m_bbFX.rightFX().setRatio( m_bbControls.m_ratioModel.value() );
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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 * PLUGIN_EXPORT lmms_plugin_main( Model* parent, void* data )
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{
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return new BassBoosterEffect( parent, static_cast<const Plugin::Descriptor::SubPluginFeatures::Key *>( data ) );
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}
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}
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