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/* Copyright (c) 1997-2001 Miller Puckette and others.
* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution. */
/* MIDI. */
#include "m_pd.h"
static t_class *poly_class;
typedef struct voice
{
t_float v_pitch;
int v_used;
unsigned long v_serial;
} t_voice;
typedef struct poly
{
t_object x_obj;
int x_n;
t_voice *x_vec;
t_float x_vel;
t_outlet *x_pitchout;
t_outlet *x_velout;
unsigned long x_serial;
int x_steal;
} t_poly;
static void *poly_new(t_float fnvoice, t_float fsteal)
{
int i, n = fnvoice;
t_poly *x = (t_poly *)pd_new(poly_class);
t_voice *v;
if (n < 1) n = 1;
x->x_n = n;
x->x_vec = (t_voice *)getbytes(n * sizeof(*x->x_vec));
for (v = x->x_vec, i = n; i--; v++)
v->v_pitch = v->v_used = v->v_serial = 0;
x->x_vel = 0;
x->x_steal = (fsteal != 0);
floatinlet_new(&x->x_obj, &x->x_vel);
outlet_new(&x->x_obj, &s_float);
x->x_pitchout = outlet_new(&x->x_obj, &s_float);
x->x_velout = outlet_new(&x->x_obj, &s_float);
x->x_serial = 0;
return (x);
}
static void poly_float(t_poly *x, t_float f)
{
int i;
t_voice *v;
t_voice *firston, *firstoff;
unsigned int serialon, serialoff, onindex = 0, offindex = 0;
if (x->x_vel > 0)
{
/* note on. Look for a vacant voice */
for (v = x->x_vec, i = 0, firston = firstoff = 0,
serialon = serialoff = 0xffffffff; i < x->x_n; v++, i++)
{
if (v->v_used && v->v_serial < serialon)
firston = v, serialon = v->v_serial, onindex = i;
else if (!v->v_used && v->v_serial < serialoff)
firstoff = v, serialoff = v->v_serial, offindex = i;
}
if (firstoff)
{
outlet_float(x->x_velout, x->x_vel);
outlet_float(x->x_pitchout, firstoff->v_pitch = f);
outlet_float(x->x_obj.ob_outlet, offindex+1);
firstoff->v_used = 1;
firstoff->v_serial = x->x_serial++;
}
/* if none, steal one */
else if (firston && x->x_steal)
{
outlet_float(x->x_velout, 0);
outlet_float(x->x_pitchout, firston->v_pitch);
outlet_float(x->x_obj.ob_outlet, onindex+1);
outlet_float(x->x_velout, x->x_vel);
outlet_float(x->x_pitchout, firston->v_pitch = f);
outlet_float(x->x_obj.ob_outlet, onindex+1);
firston->v_serial = x->x_serial++;
}
}
else /* note off. Turn off oldest match */
{
for (v = x->x_vec, i = 0, firston = 0, serialon = 0xffffffff;
i < x->x_n; v++, i++)
if (v->v_used && v->v_pitch == f && v->v_serial < serialon)
firston = v, serialon = v->v_serial, onindex = i;
if (firston)
{
firston->v_used = 0;
firston->v_serial = x->x_serial++;
outlet_float(x->x_velout, 0);
outlet_float(x->x_pitchout, firston->v_pitch);
outlet_float(x->x_obj.ob_outlet, onindex+1);
}
}
}
static void poly_stop(t_poly *x)
{
int i;
t_voice *v;
for (i = 0, v = x->x_vec; i < x->x_n; i++, v++)
if (v->v_used)
{
outlet_float(x->x_velout, 0L);
outlet_float(x->x_pitchout, v->v_pitch);
outlet_float(x->x_obj.ob_outlet, i+1);
v->v_used = 0;
v->v_serial = x->x_serial++;
}
}
static void poly_clear(t_poly *x)
{
int i;
t_voice *v;
for (v = x->x_vec, i = x->x_n; i--; v++) v->v_used = v->v_serial = 0;
}
static void poly_free(t_poly *x)
{
freebytes(x->x_vec, x->x_n * sizeof (*x->x_vec));
}
void poly_setup(void)
{
poly_class = class_new(gensym("poly"),
(t_newmethod)poly_new, (t_method)poly_free,
sizeof(t_poly), 0, A_DEFFLOAT, A_DEFFLOAT, 0);
class_addfloat(poly_class, poly_float);
class_addmethod(poly_class, (t_method)poly_stop, gensym("stop"), 0);
class_addmethod(poly_class, (t_method)poly_clear, gensym("clear"), 0);
}
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