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/* scalefilter - maps incoming numbers onto the closest member of a 12TET scale
* Copyright (c) 2005-2023 Edward Kelly
* Forinformaion on usage and distribution, and for a DICLAIMER OF ALL
* WARRANTIES, see the file "LICENSE.txt," in this distribution. */
#include "m_pd.h"
#include <string.h>
#define MAXSIZE 256
static t_class *scalefilter_class;
typedef struct _scalefilter
{
t_object x_obj;
t_atom chroma[MAXSIZE], instance[MAXSIZE];
int bufsize, isscale, elements, foundelements;
t_float maxinstances;
t_outlet *note, *scale, *fill, *nomatch, *full;
} t_scalefilter;
static void scalefilter_set(t_scalefilter *x, t_symbol *s, int size, t_atom *thisscale)
{
int i;
t_float arg;
if(size >= 1) {
for(i=0;i<size;i++) {
arg = atom_getfloat(thisscale+i);
SETFLOAT(&x->chroma[i],arg);
SETFLOAT(&x->instance[i],0);
}
x->isscale = 1;
x->bufsize = x->elements = size;
x->foundelements = 0;
outlet_float(x->fill,(t_float)x->elements);
}
}
static void scalefilter_zero(t_scalefilter *x, t_floatarg size)
{
int i;
int newsize = 12;
if(size >= 1) {
newsize = (int)size;
}
x->bufsize = newsize;
for(i=0;i<newsize;i++) {
SETFLOAT(&x->chroma[i],-9999);
SETFLOAT(&x->instance[i],0);
}
x->isscale = 0;
x->elements = 0;
x->foundelements = 0;
}
static void scalefilter_reset(t_scalefilter *x)
{
int i;
for(i=0;i<x->bufsize;i++) {
SETFLOAT(&x->instance[i],0);
}
if(x->isscale == 0) {
x->elements = 0;
}
if(x->isscale == 1) {
x->elements = x->bufsize;
}
x->foundelements = 0;
}
static void scalefilter_float(t_scalefilter *x, t_floatarg fin)
{
int max = x->maxinstances >= 1 ? (int)x->maxinstances : 1;
int i, instances;
int found = 0;
t_float element;
if(x->isscale == 1) { // if there is already a scale, just compare
for(i=0;i<x->bufsize;i++) {
element = atom_getfloatarg(i, MAXSIZE, x->chroma);
if(element == fin) {
found = 1;
instances = (int)atom_getfloatarg(i, MAXSIZE, x->instance);
if(instances < max) {
SETFLOAT(&x->instance[i],instances + 1);
outlet_float(x->note,fin);
x->foundelements++;
}
}
}
}
if(x->isscale == 0) { // if there is no scale, add new notes to the end
for(i=0;i<x->elements;i++) {
element = atom_getfloatarg(i, MAXSIZE, x->chroma);
if(element == fin) {
found = 1;
instances = (int)atom_getfloatarg(i, MAXSIZE, x->instance);
if(instances < max) {
SETFLOAT(&x->instance[i],instances + 1);
outlet_float(x->note, fin);
x->foundelements++;
}
}
}
if(x->bufsize > x->elements && found == 0) {
SETFLOAT(&x->chroma[x->elements],fin);
SETFLOAT(&x->instance[i],1);
found = 1;
x->elements++;
outlet_float(x->note, fin);
outlet_float(x->fill, (t_float)x->elements);
x->foundelements++;
}
if(x->elements == x->bufsize) {
x->isscale = 1;
}
}
if(x->foundelements >= x->bufsize * (int)x->maxinstances) {
outlet_bang(x->full);
}
if(found == 0) {
outlet_float(x->nomatch, fin);
}
}
static void scalefilter_get(t_scalefilter *x)
{
if(x->isscale == 1) {
outlet_list(x->scale, gensym("list"), x->bufsize, x->chroma);
}
if(x->isscale == 0) {
outlet_list(x->scale, gensym("list"), x->elements, x->chroma);
}
}
static void *scalefilter_new(t_floatarg length, t_floatarg maximum)
{
t_float len = 12;
t_float max = 2;
t_scalefilter *x = (t_scalefilter *)pd_new(scalefilter_class);
if(length >= 1) {
len = length;
}
max = maximum < MAXSIZE ? maximum >= 1 ? maximum : 2 : MAXSIZE;
x->bufsize = len;
x->maxinstances = max;
x->foundelements = 0;
int i;
for(i=0;i<MAXSIZE;i++) {
SETFLOAT(&x->chroma[i],-1);
SETFLOAT(&x->instance[i],0);
}
x->isscale = 0;
x->note = outlet_new(&x->x_obj, gensym("float"));
x->scale = outlet_new(&x->x_obj, gensym("list"));
x->nomatch = outlet_new(&x->x_obj, gensym("float"));
x->fill = outlet_new(&x->x_obj, gensym("float"));
x->full = outlet_new(&x->x_obj, gensym("bang"));
floatinlet_new(&x->x_obj, &x->maxinstances);
return (void *)x;
}
void scalefilter_setup(void)
{
scalefilter_class = class_new(gensym("scalefilter"),
(t_newmethod)scalefilter_new,
0, sizeof(t_scalefilter),
0, A_DEFFLOAT, A_DEFFLOAT, 0);
post("_-^scalefilter^-_ by Ed Kelly, 2013");
class_addfloat(scalefilter_class, scalefilter_float);
class_addmethod(scalefilter_class, (t_method)scalefilter_set, gensym("set"), A_GIMME, 0);
class_addmethod(scalefilter_class, (t_method)scalefilter_zero, gensym("zero"), A_DEFFLOAT, 0);
class_addmethod(scalefilter_class, (t_method)scalefilter_reset, gensym("reset"), A_DEFFLOAT, 0);
class_addmethod(scalefilter_class, (t_method)scalefilter_get, gensym("get"), A_DEFFLOAT, 0);
}
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