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/*
ZynAddSubFX - a software synthesizer
PADnote.C - The "pad" synthesizer
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 <math.h>
#include "PADnote.h"
#include "../Misc/Config.h"
PADnote::PADnote(PADnoteParameters *parameters, Controller *ctl_,REALTYPE freq, REALTYPE velocity, int portamento_, int midinote){
ready=0;
pars=parameters;
portamento=portamento_;
ctl=ctl_;
this->velocity=velocity;
finished_=false;
if (pars->Pfixedfreq==0) basefreq=freq;
else {
basefreq=440.0;
int fixedfreqET=pars->PfixedfreqET;
if (fixedfreqET!=0) {//if the frequency varies according the keyboard note
REALTYPE tmp=(midinote-69.0)/12.0*(pow(2.0,(fixedfreqET-1)/63.0)-1.0);
if (fixedfreqET<=64) basefreq*=pow(2.0,tmp);
else basefreq*=pow(3.0,tmp);
};
};
firsttime=true;
released=false;
realfreq=basefreq;
NoteGlobalPar.Detune=getdetune(pars->PDetuneType
,pars->PCoarseDetune,pars->PDetune);
//find out the closest note
REALTYPE logfreq=log(basefreq*pow(2.0,NoteGlobalPar.Detune/1200.0));
REALTYPE mindist=fabs(logfreq-log(pars->sample[0].basefreq+0.0001));
nsample=0;
for (int i=1;i<PAD_MAX_SAMPLES;i++){
if (pars->sample[i].smp==NULL) break;
REALTYPE dist=fabs(logfreq-log(pars->sample[i].basefreq+0.0001));
// printf("(mindist=%g) %i %g %g\n",mindist,i,dist,pars->sample[i].basefreq);
if (dist<mindist){
nsample=i;
mindist=dist;
};
};
int size=pars->sample[nsample].size;
if (size==0) size=1;
poshi_l=(int)(RND*(size-1));
if (pars->PStereo!=0) poshi_r=(poshi_l+size/2)%size;
else poshi_r=poshi_l;
poslo=0.0;
tmpwave=new REALTYPE [SOUND_BUFFER_SIZE];
if (pars->PPanning==0) NoteGlobalPar.Panning=RND;
else NoteGlobalPar.Panning=pars->PPanning/128.0;
NoteGlobalPar.FilterCenterPitch=pars->GlobalFilter->getfreq()+//center freq
pars->PFilterVelocityScale/127.0*6.0* //velocity sensing
(VelF(velocity,pars->PFilterVelocityScaleFunction)-1);
if (pars->PPunchStrength!=0) {
NoteGlobalPar.Punch.Enabled=1;
NoteGlobalPar.Punch.t=1.0;//start from 1.0 and to 0.0
NoteGlobalPar.Punch.initialvalue=( (pow(10,1.5*pars->PPunchStrength/127.0)-1.0)
*VelF(velocity,pars->PPunchVelocitySensing) );
REALTYPE time=pow(10,3.0*pars->PPunchTime/127.0)/10000.0;//0.1 .. 100 ms
REALTYPE stretch=pow(440.0/freq,pars->PPunchStretch/64.0);
NoteGlobalPar.Punch.dt=1.0/(time*SAMPLE_RATE*stretch);
} else NoteGlobalPar.Punch.Enabled=0;
NoteGlobalPar.FreqEnvelope=new Envelope(pars->FreqEnvelope,basefreq);
NoteGlobalPar.FreqLfo=new LFO(pars->FreqLfo,basefreq);
NoteGlobalPar.AmpEnvelope=new Envelope(pars->AmpEnvelope,basefreq);
NoteGlobalPar.AmpLfo=new LFO(pars->AmpLfo,basefreq);
NoteGlobalPar.Volume=4.0*pow(0.1,3.0*(1.0-pars->PVolume/96.0))//-60 dB .. 0 dB
*VelF(velocity,pars->PAmpVelocityScaleFunction);//velocity sensing
NoteGlobalPar.AmpEnvelope->envout_dB();//discard the first envelope output
globaloldamplitude=globalnewamplitude=NoteGlobalPar.Volume*NoteGlobalPar.AmpEnvelope->envout_dB()*NoteGlobalPar.AmpLfo->amplfoout();
NoteGlobalPar.GlobalFilterL=new Filter(pars->GlobalFilter);
NoteGlobalPar.GlobalFilterR=new Filter(pars->GlobalFilter);
NoteGlobalPar.FilterEnvelope=new Envelope(pars->FilterEnvelope,basefreq);
NoteGlobalPar.FilterLfo=new LFO(pars->FilterLfo,basefreq);
NoteGlobalPar.FilterQ=pars->GlobalFilter->getq();
NoteGlobalPar.FilterFreqTracking=pars->GlobalFilter->getfreqtracking(basefreq);
ready=1;///sa il pun pe asta doar cand e chiar gata
if (parameters->sample[nsample].smp==NULL){
finished_=true;
return;
};
};
PADnote::~PADnote(){
delete (NoteGlobalPar.FreqEnvelope);
delete (NoteGlobalPar.FreqLfo);
delete (NoteGlobalPar.AmpEnvelope);
delete (NoteGlobalPar.AmpLfo);
delete (NoteGlobalPar.GlobalFilterL);
delete (NoteGlobalPar.GlobalFilterR);
delete (NoteGlobalPar.FilterEnvelope);
delete (NoteGlobalPar.FilterLfo);
delete (tmpwave);
};
inline void PADnote::fadein(REALTYPE *smps){
int zerocrossings=0;
for (int i=1;i<SOUND_BUFFER_SIZE;i++)
if ((smps[i-1]<0.0) && (smps[i]>0.0)) zerocrossings++;//this is only the possitive crossings
REALTYPE tmp=(SOUND_BUFFER_SIZE-1.0)/(zerocrossings+1)/3.0;
if (tmp<8.0) tmp=8.0;
int n;
F2I(tmp,n);//how many samples is the fade-in
if (n>SOUND_BUFFER_SIZE) n=SOUND_BUFFER_SIZE;
for (int i=0;i<n;i++) {//fade-in
REALTYPE tmp=0.5-cos((REALTYPE)i/(REALTYPE) n*PI)*0.5;
smps[i]*=tmp;
};
};
void PADnote::computecurrentparameters(){
REALTYPE globalpitch,globalfilterpitch;
globalpitch=0.01*(NoteGlobalPar.FreqEnvelope->envout()+
NoteGlobalPar.FreqLfo->lfoout()*ctl->modwheel.relmod+NoteGlobalPar.Detune);
globaloldamplitude=globalnewamplitude;
globalnewamplitude=NoteGlobalPar.Volume*NoteGlobalPar.AmpEnvelope->envout_dB()*NoteGlobalPar.AmpLfo->amplfoout();
globalfilterpitch=NoteGlobalPar.FilterEnvelope->envout()+NoteGlobalPar.FilterLfo->lfoout()
+NoteGlobalPar.FilterCenterPitch;
REALTYPE tmpfilterfreq=globalfilterpitch+ctl->filtercutoff.relfreq
+NoteGlobalPar.FilterFreqTracking;
tmpfilterfreq=NoteGlobalPar.GlobalFilterL->getrealfreq(tmpfilterfreq);
REALTYPE globalfilterq=NoteGlobalPar.FilterQ*ctl->filterq.relq;
NoteGlobalPar.GlobalFilterL->setfreq_and_q(tmpfilterfreq,globalfilterq);
NoteGlobalPar.GlobalFilterR->setfreq_and_q(tmpfilterfreq,globalfilterq);
//compute the portamento, if it is used by this note
REALTYPE portamentofreqrap=1.0;
if (portamento!=0){//this voice use portamento
portamentofreqrap=ctl->portamento.freqrap;
if (ctl->portamento.used==0){//the portamento has finished
portamento=0;//this note is no longer "portamented"
};
};
realfreq=basefreq*portamentofreqrap*pow(2.0,globalpitch/12.0)*ctl->pitchwheel.relfreq;
};
int PADnote::Compute_Linear(REALTYPE *outl,REALTYPE *outr,int freqhi,REALTYPE freqlo){
REALTYPE *smps=pars->sample[nsample].smp;
if (smps==NULL){
finished_=true;
return(1);
};
int size=pars->sample[nsample].size;
for (int i=0;i<SOUND_BUFFER_SIZE;i++){
poshi_l+=freqhi;
poshi_r+=freqhi;
poslo+=freqlo;
if (poslo>=1.0){
poshi_l+=1;
poshi_r+=1;
poslo-=1.0;
};
if (poshi_l>=size) poshi_l%=size;
if (poshi_r>=size) poshi_r%=size;
outl[i]=smps[poshi_l]*(1.0-poslo)+smps[poshi_l+1]*poslo;
outr[i]=smps[poshi_r]*(1.0-poslo)+smps[poshi_r+1]*poslo;
};
return(1);
};
int PADnote::Compute_Cubic(REALTYPE *outl,REALTYPE *outr,int freqhi,REALTYPE freqlo){
REALTYPE *smps=pars->sample[nsample].smp;
if (smps==NULL){
finished_=true;
return(1);
};
int size=pars->sample[nsample].size;
REALTYPE xm1,x0,x1,x2,a,b,c;
for (int i=0;i<SOUND_BUFFER_SIZE;i++){
poshi_l+=freqhi;
poshi_r+=freqhi;
poslo+=freqlo;
if (poslo>=1.0){
poshi_l+=1;
poshi_r+=1;
poslo-=1.0;
};
if (poshi_l>=size) poshi_l%=size;
if (poshi_r>=size) poshi_r%=size;
//left
xm1=smps[poshi_l];
x0=smps[poshi_l + 1];
x1=smps[poshi_l + 2];
x2=smps[poshi_l + 3];
a = (3.0 * (x0-x1) - xm1 + x2)*0.5;
b = 2.0*x1 + xm1 - (5.0*x0 + x2)*0.5;
c = (x1 - xm1)*0.5;
outl[i] = (((a * poslo) + b) * poslo + c) * poslo + x0;
//right
xm1=smps[poshi_r];
x0=smps[poshi_r + 1];
x1=smps[poshi_r + 2];
x2=smps[poshi_r + 3];
a = (3.0 * (x0-x1) - xm1 + x2)*0.5;
b = 2.0*x1 + xm1 - (5.0*x0 + x2)*0.5;
c = (x1 - xm1)*0.5;
outr[i] = (((a * poslo) + b) * poslo + c) * poslo + x0;
};
return(1);
};
int PADnote::noteout(REALTYPE *outl,REALTYPE *outr){
computecurrentparameters();
REALTYPE *smps=pars->sample[nsample].smp;
if (smps==NULL){
for (int i=0;i<SOUND_BUFFER_SIZE;i++){
outl[i]=0.0;
outr[i]=0.0;
};
return(1);
};
REALTYPE smpfreq=pars->sample[nsample].basefreq;
REALTYPE freqrap=realfreq/smpfreq;
int freqhi=(int) (floor(freqrap));
REALTYPE freqlo=freqrap-floor(freqrap);
if (config.cfg.Interpolation) Compute_Cubic(outl,outr,freqhi,freqlo);
else Compute_Linear(outl,outr,freqhi,freqlo);
if (firsttime){
fadein(outl);
fadein(outr);
firsttime=false;
};
NoteGlobalPar.GlobalFilterL->filterout(outl);
NoteGlobalPar.GlobalFilterR->filterout(outr);
//Apply the punch
if (NoteGlobalPar.Punch.Enabled!=0){
for (int i=0;i<SOUND_BUFFER_SIZE;i++){
REALTYPE punchamp=NoteGlobalPar.Punch.initialvalue*NoteGlobalPar.Punch.t+1.0;
outl[i]*=punchamp;
outr[i]*=punchamp;
NoteGlobalPar.Punch.t-=NoteGlobalPar.Punch.dt;
if (NoteGlobalPar.Punch.t<0.0) {
NoteGlobalPar.Punch.Enabled=0;
break;
};
};
};
if (ABOVE_AMPLITUDE_THRESHOLD(globaloldamplitude,globalnewamplitude)){
// Amplitude Interpolation
for (int i=0;i<SOUND_BUFFER_SIZE;i++){
REALTYPE tmpvol=INTERPOLATE_AMPLITUDE(globaloldamplitude,globalnewamplitude,i,SOUND_BUFFER_SIZE);
outl[i]*=tmpvol*NoteGlobalPar.Panning;
outr[i]*=tmpvol*(1.0-NoteGlobalPar.Panning);
};
} else {
for (int i=0;i<SOUND_BUFFER_SIZE;i++) {
outl[i]*=globalnewamplitude*NoteGlobalPar.Panning;
outr[i]*=globalnewamplitude*(1.0-NoteGlobalPar.Panning);
};
};
// Check if the global amplitude is finished.
// If it does, disable the note
if (NoteGlobalPar.AmpEnvelope->finished()!=0) {
for (int i=0;i<SOUND_BUFFER_SIZE;i++) {//fade-out
REALTYPE tmp=1.0-(REALTYPE)i/(REALTYPE)SOUND_BUFFER_SIZE;
outl[i]*=tmp;
outr[i]*=tmp;
};
finished_=1;
};
return(1);
};
int PADnote::finished(){
return(finished_);
};
void PADnote::relasekey(){
NoteGlobalPar.FreqEnvelope->relasekey();
NoteGlobalPar.FilterEnvelope->relasekey();
NoteGlobalPar.AmpEnvelope->relasekey();
};
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