diff options
Diffstat (limited to 'muse_qt4_evolution/synti/zynaddsubfx/Effects/EQ.C')
| -rw-r--r-- | muse_qt4_evolution/synti/zynaddsubfx/Effects/EQ.C | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/muse_qt4_evolution/synti/zynaddsubfx/Effects/EQ.C b/muse_qt4_evolution/synti/zynaddsubfx/Effects/EQ.C new file mode 100644 index 00000000..8180a655 --- /dev/null +++ b/muse_qt4_evolution/synti/zynaddsubfx/Effects/EQ.C @@ -0,0 +1,198 @@ +/* + ZynAddSubFX - a software synthesizer + + EQ.C - EQ effect + Copyright (C) 2002-2005 Nasca Octavian Paul + Author: Nasca Octavian Paul + + This program is free software; you can redistribute it and/or modify + it under the terms of version 2 of the GNU General Public License + as published by the Free Software Foundation. + + 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 (version 2) for more details. + + You should have received a copy of the GNU General Public License (version 2) + along with this program; if not, write to the Free Software Foundation, + Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + +*/ + +#include <stdio.h> +#include <stdlib.h> +#include <math.h> +#include "EQ.h" + +EQ::EQ(int insertion_,REALTYPE *efxoutl_,REALTYPE *efxoutr_){ + efxoutl=efxoutl_; + efxoutr=efxoutr_; + insertion=insertion_; + filterpars=NULL; + + for (int i=0;i<MAX_EQ_BANDS;i++){ + filter[i].Ptype=0; + filter[i].Pfreq=64; + filter[i].Pgain=64; + filter[i].Pq=64; + filter[i].Pstages=0; + filter[i].l=new AnalogFilter(6,1000.0,1.0,0); + filter[i].r=new AnalogFilter(6,1000.0,1.0,0); + }; + //default values + Ppreset=0; + Pvolume=50; + + setpreset(Ppreset); + cleanup(); +}; + +EQ::~EQ(){ +}; + +/* + * Cleanup the effect + */ +void EQ::cleanup(){ + for (int i=0;i<MAX_EQ_BANDS;i++){ + filter[i].l->cleanup(); + filter[i].r->cleanup(); + }; +}; + + + +/* + * Effect output + */ +void EQ::out(REALTYPE *smpsl,REALTYPE *smpsr){ + int i; + for (i=0;i<SOUND_BUFFER_SIZE;i++){ + efxoutl[i]=smpsl[i]*volume; + efxoutr[i]=smpsr[i]*volume; + }; + + for (i=0;i<MAX_EQ_BANDS;i++){ + if (filter[i].Ptype==0) continue; + filter[i].l->filterout(efxoutl); + filter[i].r->filterout(efxoutr); + }; +}; + + +/* + * Parameter control + */ +void EQ::setvolume(unsigned char Pvolume){ + this->Pvolume=Pvolume; + + outvolume=pow(0.005,(1.0-Pvolume/127.0))*10.0; + if (insertion==0) { + volume=1.0; + } else { + volume=outvolume; + }; + +}; + + +void EQ::setpreset(unsigned char npreset){ + const int PRESET_SIZE=1; + const int NUM_PRESETS=2; + unsigned char presets[NUM_PRESETS][PRESET_SIZE]={ + //EQ 1 + {67}, + //EQ 2 + {67}}; + + if (npreset>=NUM_PRESETS) npreset=NUM_PRESETS-1; + for (int n=0;n<PRESET_SIZE;n++) changepar(n,presets[npreset][n]); + Ppreset=npreset; +}; + + +void EQ::changepar(int npar,unsigned char value){ + switch (npar){ + case 0: setvolume(value); + break; + }; + if (npar<10) return; + + int nb=(npar-10)/5;//number of the band (filter) + if (nb>=MAX_EQ_BANDS) return; + int bp=npar%5;//band paramenter + + REALTYPE tmp; + switch(bp){ + case 0: if (value>9) value=0;//has to be changed if more filters will be added + filter[nb].Ptype=value; + if (value!=0){ + filter[nb].l->settype(value-1); + filter[nb].r->settype(value-1); + }; + break; + case 1: filter[nb].Pfreq=value; + tmp=600.0*pow(30.0,(value-64.0)/64.0); + filter[nb].l->setfreq(tmp); + filter[nb].r->setfreq(tmp); + break; + case 2: filter[nb].Pgain=value; + tmp=30.0*(value-64.0)/64.0; + filter[nb].l->setgain(tmp); + filter[nb].r->setgain(tmp); + break; + case 3: filter[nb].Pq=value; + tmp=pow(30.0,(value-64.0)/64.0); + filter[nb].l->setq(tmp); + filter[nb].r->setq(tmp); + break; + case 4: if (value>=MAX_FILTER_STAGES) value=MAX_FILTER_STAGES-1; + filter[nb].Pstages=value; + filter[nb].l->setstages(value); + filter[nb].r->setstages(value); + break; + }; +}; + +unsigned char EQ::getpar(int npar){ + switch (npar){ + case 0: return(Pvolume); + break; + }; + + if (npar<10) return(0); + + int nb=(npar-10)/5;//number of the band (filter) + if (nb>=MAX_EQ_BANDS) return(0); + int bp=npar%5;//band paramenter + switch(bp){ + case 0: return(filter[nb].Ptype); + break; + case 1: return(filter[nb].Pfreq); + break; + case 2: return(filter[nb].Pgain); + break; + case 3: return(filter[nb].Pq); + break; + case 4: return(filter[nb].Pstages); + break; + }; + + return(0);//in case of bogus parameter number +}; + + + + +REALTYPE EQ::getfreqresponse(REALTYPE freq){ + REALTYPE resp=1.0; + + for (int i=0;i<MAX_EQ_BANDS;i++){ + if (filter[i].Ptype==0) continue; + resp*=filter[i].l->H(freq); + }; + return(rap2dB(resp*outvolume)); +}; + + |