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Diffstat (limited to 'muse_qt4_evolution/synti/zynaddsubfx/Misc/Util.C')
| -rw-r--r-- | muse_qt4_evolution/synti/zynaddsubfx/Misc/Util.C | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/muse_qt4_evolution/synti/zynaddsubfx/Misc/Util.C b/muse_qt4_evolution/synti/zynaddsubfx/Misc/Util.C new file mode 100644 index 00000000..74619731 --- /dev/null +++ b/muse_qt4_evolution/synti/zynaddsubfx/Misc/Util.C @@ -0,0 +1,112 @@ +/* + 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; +}; + |