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/*
ZynAddSubFX - a software synthesizer
Util.C - Miscellaneous functions
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 "Util.h"
#include <math.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
int SAMPLE_RATE=44100;
int SOUND_BUFFER_SIZE=256;
int OSCIL_SIZE=512;
Config config;
REALTYPE *denormalkillbuf;
/*
* Transform the velocity according the scaling parameter (velocity sensing)
*/
REALTYPE VelF(REALTYPE velocity,unsigned char scaling){
REALTYPE x;
x=pow(VELOCITY_MAX_SCALE,(64.0-scaling)/64.0);
if ((scaling==127)||(velocity>0.99)) return(1.0);
else return(pow(velocity,x));
};
/*
* Get the detune in cents
*/
REALTYPE getdetune(unsigned char type,unsigned short int coarsedetune,unsigned short int finedetune){
REALTYPE det=0.0,octdet=0.0,cdet=0.0,findet=0.0;
//Get Octave
int octave=coarsedetune/1024;
if (octave>=8) octave-=16;
octdet=octave*1200.0;
//Coarse and fine detune
int cdetune=coarsedetune%1024;
if (cdetune>512) cdetune-=1024;
int fdetune=finedetune-8192;
switch (type){
// case 1: is used for the default (see below)
case 2: cdet=fabs(cdetune*10.0);
findet=fabs(fdetune/8192.0)*10.0;
break;
case 3: cdet=fabs(cdetune*100);
findet=pow(10,fabs(fdetune/8192.0)*3.0)/10.0-0.1;
break;
case 4: cdet=fabs(cdetune*701.95500087);//perfect fifth
findet=(pow(2,fabs(fdetune/8192.0)*12.0)-1.0)/4095*1200;
break;
//case ...: need to update N_DETUNE_TYPES, if you'll add more
default:cdet=fabs(cdetune*50.0);
findet=fabs(fdetune/8192.0)*35.0;//almost like "Paul's Sound Designer 2"
break;
};
if (finedetune<8192) findet=-findet;
if (cdetune<0) cdet=-cdet;
det=octdet+cdet+findet;
return(det);
};
bool fileexists(char *filename){
struct stat tmp;
int result=stat(filename,&tmp);
if (result>=0) return(true);
return(false);
};
void newFFTFREQS(FFTFREQS *f,int size){
f->c=new REALTYPE[size];
f->s=new REALTYPE[size];
for (int i=0;i<size;i++){
f->c[i]=0.0;f->s[i]=0.0;
};
};
void deleteFFTFREQS(FFTFREQS *f){
delete[] f->c;
delete[] f->s;
f->c=f->s=NULL;
};
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