/* * eqeffect.cpp - defination of EqEffect class. * * Copyright (c) 2014 David French * * 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 "EqEffect.h" #include "Engine.h" #include "EqFader.h" #include "interpolation.h" #include "lmms_math.h" #include "embed.h" #include "plugin_export.h" extern "C" { Plugin::Descriptor PLUGIN_EXPORT eq_plugin_descriptor = { STRINGIFY( PLUGIN_NAME ), "Equalizer", QT_TRANSLATE_NOOP( "pluginBrowser", "A native eq plugin" ), "Dave French ", 0x0100, Plugin::Effect, new PluginPixmapLoader("logo"), NULL, NULL } ; } EqEffect::EqEffect( Model *parent, const Plugin::Descriptor::SubPluginFeatures::Key *key) : Effect( &eq_plugin_descriptor, parent, key ), m_eqControls( this ), m_inGain( 1.0 ), m_outGain( 1.0 ) { } EqEffect::~EqEffect() { } bool EqEffect::processAudioBuffer( sampleFrame *buf, const fpp_t frames ) { const int sampleRate = Engine::mixer()->processingSampleRate(); //wet/dry controls const float dry = dryLevel(); const float wet = wetLevel(); sample_t dryS[2]; // setup sample exact controls float hpRes = m_eqControls.m_hpResModel.value(); float lowShelfRes = m_eqControls.m_lowShelfResModel.value(); float para1Bw = m_eqControls.m_para1BwModel.value(); float para2Bw = m_eqControls.m_para2BwModel.value(); float para3Bw = m_eqControls.m_para3BwModel.value(); float para4Bw = m_eqControls.m_para4BwModel.value(); float highShelfRes = m_eqControls.m_highShelfResModel.value(); float lpRes = m_eqControls.m_lpResModel.value(); float hpFreq = m_eqControls.m_hpFeqModel.value(); float lowShelfFreq = m_eqControls.m_lowShelfFreqModel.value(); float para1Freq = m_eqControls.m_para1FreqModel.value(); float para2Freq = m_eqControls.m_para2FreqModel.value(); float para3Freq = m_eqControls.m_para3FreqModel.value(); float para4Freq = m_eqControls.m_para4FreqModel.value(); float highShelfFreq = m_eqControls.m_highShelfFreqModel.value(); float lpFreq = m_eqControls.m_lpFreqModel.value(); bool hpActive = m_eqControls.m_hpActiveModel.value(); bool hp24Active = m_eqControls.m_hp24Model.value(); bool hp48Active = m_eqControls.m_hp48Model.value(); bool lowShelfActive = m_eqControls.m_lowShelfActiveModel.value(); bool para1Active = m_eqControls.m_para1ActiveModel.value(); bool para2Active = m_eqControls.m_para2ActiveModel.value(); bool para3Active = m_eqControls.m_para3ActiveModel.value(); bool para4Active = m_eqControls.m_para4ActiveModel.value(); bool highShelfActive = m_eqControls.m_highShelfActiveModel.value(); bool lpActive = m_eqControls.m_lpActiveModel.value(); bool lp24Active = m_eqControls.m_lp24Model.value(); bool lp48Active = m_eqControls.m_lp48Model.value(); float lowShelfGain = m_eqControls.m_lowShelfGainModel.value(); float para1Gain = m_eqControls.m_para1GainModel.value(); float para2Gain = m_eqControls.m_para2GainModel.value(); float para3Gain = m_eqControls.m_para3GainModel.value(); float para4Gain = m_eqControls.m_para4GainModel.value(); float highShelfGain = m_eqControls.m_highShelfGainModel.value(); //set all filter parameters once per frame, EqFilter handles //smooth xfading, reducing pops clicks and dc bias offsets m_hp12.setParameters( sampleRate, hpFreq, hpRes, 1 ); m_hp24.setParameters( sampleRate, hpFreq, hpRes, 1 ); m_hp480.setParameters( sampleRate, hpFreq, hpRes, 1 ); m_hp481.setParameters( sampleRate, hpFreq, hpRes, 1 ); m_lowShelf.setParameters( sampleRate, lowShelfFreq, lowShelfRes, lowShelfGain ); m_para1.setParameters( sampleRate, para1Freq, para1Bw, para1Gain ); m_para2.setParameters( sampleRate, para2Freq, para2Bw, para2Gain ); m_para3.setParameters( sampleRate, para3Freq, para3Bw, para3Gain ); m_para4.setParameters( sampleRate, para4Freq, para4Bw, para4Gain ); m_highShelf.setParameters( sampleRate, highShelfFreq, highShelfRes, highShelfGain ); m_lp12.setParameters( sampleRate, lpFreq, lpRes, 1 ); m_lp24.setParameters( sampleRate, lpFreq, lpRes, 1 ); m_lp480.setParameters( sampleRate, lpFreq, lpRes, 1 ); m_lp481.setParameters( sampleRate, lpFreq, lpRes, 1 ); if( !isEnabled() || !isRunning () ) { return( false ); } if( m_eqControls.m_outGainModel.isValueChanged() ) { m_outGain = dbfsToAmp(m_eqControls.m_outGainModel.value()); } if( m_eqControls.m_inGainModel.isValueChanged() ) { m_inGain = dbfsToAmp(m_eqControls.m_inGainModel.value()); } m_eqControls.m_inProgress = true; double outSum = 0.0; for( fpp_t f = 0; f < frames; ++f ) { outSum += buf[f][0]*buf[f][0] + buf[f][1]*buf[f][1]; } const float outGain = m_outGain; sampleFrame m_inPeak = { 0, 0 }; if(m_eqControls.m_analyseInModel.value( true ) && outSum > 0 && m_eqControls.isViewVisible() ) { m_eqControls.m_inFftBands.analyze( buf, frames ); } else { m_eqControls.m_inFftBands.clear(); } gain( buf, frames, m_inGain, &m_inPeak ); m_eqControls.m_inPeakL = m_eqControls.m_inPeakL < m_inPeak[0] ? m_inPeak[0] : m_eqControls.m_inPeakL; m_eqControls.m_inPeakR = m_eqControls.m_inPeakR < m_inPeak[1] ? m_inPeak[1] : m_eqControls.m_inPeakR; float periodProgress = 0.0f; // percentage of period processed for( fpp_t f = 0; f < frames; ++f) { periodProgress = (float)f / (float)(frames-1); //wet dry buffer dryS[0] = buf[f][0]; dryS[1] = buf[f][1]; if( hpActive ) { buf[f][0] = m_hp12.update( buf[f][0], 0, periodProgress ); buf[f][1] = m_hp12.update( buf[f][1], 1, periodProgress ); if( hp24Active || hp48Active ) { buf[f][0] = m_hp24.update( buf[f][0], 0, periodProgress ); buf[f][1] = m_hp24.update( buf[f][1], 1, periodProgress ); } if( hp48Active ) { buf[f][0] = m_hp480.update( buf[f][0], 0, periodProgress ); buf[f][1] = m_hp480.update( buf[f][1], 1, periodProgress ); buf[f][0] = m_hp481.update( buf[f][0], 0, periodProgress ); buf[f][1] = m_hp481.update( buf[f][1], 1, periodProgress ); } } if( lowShelfActive ) { buf[f][0] = m_lowShelf.update( buf[f][0], 0, periodProgress ); buf[f][1] = m_lowShelf.update( buf[f][1], 1, periodProgress ); } if( para1Active ) { buf[f][0] = m_para1.update( buf[f][0], 0, periodProgress ); buf[f][1] = m_para1.update( buf[f][1], 1, periodProgress ); } if( para2Active ) { buf[f][0] = m_para2.update( buf[f][0], 0, periodProgress ); buf[f][1] = m_para2.update( buf[f][1], 1, periodProgress ); } if( para3Active ) { buf[f][0] = m_para3.update( buf[f][0], 0, periodProgress ); buf[f][1] = m_para3.update( buf[f][1], 1, periodProgress ); } if( para4Active ) { buf[f][0] = m_para4.update( buf[f][0], 0, periodProgress ); buf[f][1] = m_para4.update( buf[f][1], 1, periodProgress ); } if( highShelfActive ) { buf[f][0] = m_highShelf.update( buf[f][0], 0, periodProgress ); buf[f][1] = m_highShelf.update( buf[f][1], 1, periodProgress ); } if( lpActive ){ buf[f][0] = m_lp12.update( buf[f][0], 0, periodProgress ); buf[f][1] = m_lp12.update( buf[f][1], 1, periodProgress ); if( lp24Active || lp48Active ) { buf[f][0] = m_lp24.update( buf[f][0], 0, periodProgress ); buf[f][1] = m_lp24.update( buf[f][1], 1, periodProgress ); } if( lp48Active ) { buf[f][0] = m_lp480.update( buf[f][0], 0, periodProgress ); buf[f][1] = m_lp480.update( buf[f][1], 1, periodProgress ); buf[f][0] = m_lp481.update( buf[f][0], 0, periodProgress ); buf[f][1] = m_lp481.update( buf[f][1], 1, periodProgress ); } } //apply wet / dry levels buf[f][1] = ( dry * dryS[1] ) + ( wet * buf[f][1] ); buf[f][0] = ( dry * dryS[0] ) + ( wet * buf[f][0] ); } sampleFrame outPeak = { 0, 0 }; gain( buf, frames, outGain, &outPeak ); m_eqControls.m_outPeakL = m_eqControls.m_outPeakL < outPeak[0] ? outPeak[0] : m_eqControls.m_outPeakL; m_eqControls.m_outPeakR = m_eqControls.m_outPeakR < outPeak[1] ? outPeak[1] : m_eqControls.m_outPeakR; checkGate( outSum / frames ); if(m_eqControls.m_analyseOutModel.value( true ) && outSum > 0 && m_eqControls.isViewVisible() ) { m_eqControls.m_outFftBands.analyze( buf, frames ); setBandPeaks( &m_eqControls.m_outFftBands , ( int )( sampleRate ) ); } else { m_eqControls.m_outFftBands.clear(); } m_eqControls.m_inProgress = false; return isRunning(); } float EqEffect::peakBand( float minF, float maxF, EqAnalyser *fft, int sr ) { float peak = -60; float *b = fft->m_bands; float h = 0; for( int x = 0; x < MAX_BANDS; x++, b++ ) { if( bandToFreq( x ,sr) >= minF && bandToFreq( x,sr ) <= maxF ) { h = 20 * ( log10( *b / fft->getEnergy() ) ); peak = h > peak ? h : peak; } } return ( peak + 60 ) / 100; } void EqEffect::setBandPeaks( EqAnalyser *fft, int samplerate ) { m_eqControls.m_lowShelfPeakR = m_eqControls.m_lowShelfPeakL = peakBand( m_eqControls.m_lowShelfFreqModel.value() * ( 1 - m_eqControls.m_lowShelfResModel.value() * 0.5 ), m_eqControls.m_lowShelfFreqModel.value(), fft , samplerate ); m_eqControls.m_para1PeakL = m_eqControls.m_para1PeakR = peakBand( m_eqControls.m_para1FreqModel.value() * ( 1 - m_eqControls.m_para1BwModel.value() * 0.5 ), m_eqControls.m_para1FreqModel.value() * ( 1 + m_eqControls.m_para1BwModel.value() * 0.5 ), fft , samplerate ); m_eqControls.m_para2PeakL = m_eqControls.m_para2PeakR = peakBand( m_eqControls.m_para2FreqModel.value() * ( 1 - m_eqControls.m_para2BwModel.value() * 0.5 ), m_eqControls.m_para2FreqModel.value() * ( 1 + m_eqControls.m_para2BwModel.value() * 0.5 ), fft , samplerate ); m_eqControls.m_para3PeakL = m_eqControls.m_para3PeakR = peakBand( m_eqControls.m_para3FreqModel.value() * ( 1 - m_eqControls.m_para3BwModel.value() * 0.5 ), m_eqControls.m_para3FreqModel.value() * ( 1 + m_eqControls.m_para3BwModel.value() * 0.5 ), fft , samplerate ); m_eqControls.m_para4PeakL = m_eqControls.m_para4PeakR = peakBand( m_eqControls.m_para4FreqModel.value() * ( 1 - m_eqControls.m_para4BwModel.value() * 0.5 ), m_eqControls.m_para4FreqModel.value() * ( 1 + m_eqControls.m_para4BwModel.value() * 0.5 ), fft , samplerate ); m_eqControls.m_highShelfPeakL = m_eqControls.m_highShelfPeakR = peakBand( m_eqControls.m_highShelfFreqModel.value(), m_eqControls.m_highShelfFreqModel.value() * ( 1 + m_eqControls.m_highShelfResModel.value() * 0.5 ), fft, samplerate ); } extern "C" { //needed for getting plugin out of shared lib PLUGIN_EXPORT Plugin * lmms_plugin_main( Model* parent, void* data ) { return new EqEffect( parent , static_cast( data ) ); } }