diff options
Diffstat (limited to 'muse_qt4_evolution/synti/zynaddsubfx/Effects/Echo.C')
| -rw-r--r-- | muse_qt4_evolution/synti/zynaddsubfx/Effects/Echo.C | 240 |
1 files changed, 240 insertions, 0 deletions
diff --git a/muse_qt4_evolution/synti/zynaddsubfx/Effects/Echo.C b/muse_qt4_evolution/synti/zynaddsubfx/Effects/Echo.C new file mode 100644 index 00000000..a35ee1ba --- /dev/null +++ b/muse_qt4_evolution/synti/zynaddsubfx/Effects/Echo.C @@ -0,0 +1,240 @@ +/* + ZynAddSubFX - a software synthesizer + + Echo.C - Echo 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 "Echo.h" + +Echo::Echo(int insertion_,REALTYPE *efxoutl_,REALTYPE *efxoutr_){ + efxoutl=efxoutl_; + efxoutr=efxoutr_; + filterpars=NULL; + + insertion=insertion_; + //default values + Ppreset=0; + Pvolume=50; + Ppanning=64; + Pdelay=60; + Plrdelay=100; + Plrcross=100; + Pfb=40; + Phidamp=60; + + ldelay=NULL; + rdelay=NULL; + lrdelay=0; + + setpreset(Ppreset); + cleanup(); +}; + +Echo::~Echo(){ + delete[] ldelay; + delete[] rdelay; +}; + +/* + * Cleanup the effect + */ +void Echo::cleanup(){ + int i; + for (i=0;i<dl;i++) ldelay[i]=0.0; + for (i=0;i<dr;i++) rdelay[i]=0.0; + oldl=0.0; + oldr=0.0; +}; + + +/* + * Initialize the delays + */ +void Echo::initdelays(){ + kl=0;kr=0; + dl=delay-lrdelay;if (dl<1) dl=1; + dr=delay+lrdelay;if (dr<1) dr=1; + + if (ldelay!=NULL) delete [] ldelay; + if (rdelay!=NULL) delete [] rdelay; + ldelay=new REALTYPE[dl]; + rdelay=new REALTYPE[dr]; + + cleanup(); +}; + +/* + * Effect output + */ +void Echo::out(REALTYPE *smpsl,REALTYPE *smpsr){ + int i; + REALTYPE l,r,ldl,rdl; + + for (i=0;i<SOUND_BUFFER_SIZE;i++){ + ldl=ldelay[kl]; + rdl=rdelay[kr]; + l=ldl*(1.0-lrcross)+rdl*lrcross; + r=rdl*(1.0-lrcross)+ldl*lrcross; + ldl=l;rdl=r; + + efxoutl[i]=ldl*2.0; + efxoutr[i]=rdl*2.0; + ldl=smpsl[i]*panning-ldl*fb; + rdl=smpsr[i]*(1.0-panning)-rdl*fb; + + //LowPass Filter + ldelay[kl]=ldl=ldl*hidamp+oldl*(1.0-hidamp); + rdelay[kr]=rdl=rdl*hidamp+oldr*(1.0-hidamp); + oldl=ldl; + oldr=rdl; + + if (++kl>=dl) kl=0; + if (++kr>=dr) kr=0; + }; + +}; + + +/* + * Parameter control + */ +void Echo::setvolume(unsigned char Pvolume){ + this->Pvolume=Pvolume; + + if (insertion==0) { + outvolume=pow(0.01,(1.0-Pvolume/127.0))*4.0; + volume=1.0; + } else { + volume=outvolume=Pvolume/127.0; + }; + if (Pvolume==0) cleanup(); + +}; + +void Echo::setpanning(unsigned char Ppanning){ + this->Ppanning=Ppanning; + panning=(Ppanning+0.5)/127.0; +}; + +void Echo::setdelay(unsigned char Pdelay){ + this->Pdelay=Pdelay; + delay=1+(int)(Pdelay/127.0*SAMPLE_RATE*1.5);//0 .. 1.5 sec + initdelays(); +}; + +void Echo::setlrdelay(unsigned char Plrdelay){ + REALTYPE tmp; + this->Plrdelay=Plrdelay; + tmp=(pow(2,fabs(Plrdelay-64.0)/64.0*9)-1.0)/1000.0*SAMPLE_RATE; + if (Plrdelay<64.0) tmp=-tmp; + lrdelay=(int) tmp; + initdelays(); +}; + +void Echo::setlrcross(unsigned char Plrcross){ + this->Plrcross=Plrcross; + lrcross=Plrcross/127.0*1.0; +}; + +void Echo::setfb(unsigned char Pfb){ + this->Pfb=Pfb; + fb=Pfb/128.0; +}; + +void Echo::sethidamp(unsigned char Phidamp){ + this->Phidamp=Phidamp; + hidamp=1.0-Phidamp/127.0; +}; + +void Echo::setpreset(unsigned char npreset){ + const int PRESET_SIZE=7; + const int NUM_PRESETS=9; + unsigned char presets[NUM_PRESETS][PRESET_SIZE]={ + //Echo 1 + {67,64,35,64,30,59,0}, + //Echo 2 + {67,64,21,64,30,59,0}, + //Echo 3 + {67,75,60,64,30,59,10}, + //Simple Echo + {67,60,44,64,30,0,0}, + //Canyon + {67,60,102,50,30,82,48}, + //Panning Echo 1 + {67,64,44,17,0,82,24}, + //Panning Echo 2 + {81,60,46,118,100,68,18}, + //Panning Echo 3 + {81,60,26,100,127,67,36}, + //Feedback Echo + {62,64,28,64,100,90,55}}; + + + if (npreset>=NUM_PRESETS) npreset=NUM_PRESETS-1; + for (int n=0;n<PRESET_SIZE;n++) changepar(n,presets[npreset][n]); + if (insertion!=0) changepar(0,presets[npreset][0]/2);//lower the volume if this is insertion effect + Ppreset=npreset; +}; + + +void Echo::changepar(int npar,unsigned char value){ + switch (npar){ + case 0: setvolume(value); + break; + case 1: setpanning(value); + break; + case 2: setdelay(value); + break; + case 3: setlrdelay(value); + break; + case 4: setlrcross(value); + break; + case 5: setfb(value); + break; + case 6: sethidamp(value); + break; + }; +}; + +unsigned char Echo::getpar(int npar){ + switch (npar){ + case 0: return(Pvolume); + break; + case 1: return(Ppanning); + break; + case 2: return(Pdelay); + break; + case 3: return(Plrdelay); + break; + case 4: return(Plrcross); + break; + case 5: return(Pfb); + break; + case 6: return(Phidamp); + break; + }; + return(0);//in case of bogus parameter number +}; + + + + |