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/* Copyright (c) 2004 krzYszcz and others.
* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution. */
#include <math.h>
#include "m_pd.h"
#include "shared.h"
#include "common/grow.h"
#include "common/loud.h"
#include "common/clc.h"
#include "sickle/sic.h"
//#define CURVE_DEBUG
/* CHECKED apparently c74's formula has not been carefully tuned (yet?).
It has 5% deviation from the straight line for ccinput = 0 at half-domain,
range 1, and generates nans for ccinput > .995 (cf comment in clc.h). */
#define CURVE_INISIZE 64 /* LATER rethink */
#define CURVE_MAXSIZE 64
typedef struct _curveseg
{
float s_target;
float s_delta;
int s_nhops;
float s_ccinput;
double s_bb;
double s_mm;
} t_curveseg;
typedef struct _curve
{
t_sic x_sic;
float x_value;
float x_ccinput;
float x_target;
float x_delta;
int x_deltaset;
double x_vv;
double x_bb;
double x_mm;
float x_y0;
float x_dy;
float x_ksr;
int x_nleft;
int x_retarget;
int x_size; /* as allocated */
int x_nsegs; /* as used */
t_curveseg *x_curseg;
t_curveseg *x_segs;
t_curveseg x_segini[CURVE_INISIZE];
t_clock *x_clock;
t_outlet *x_bangout;
#ifdef CURVE_DEBUG
int dbg_nretargets;
int dbg_exitpoint;
int dbg_nhops;
#endif
} t_curve;
static t_class *curve_class;
static double curve_coef;
static void curve_cc(t_curve *x, t_curveseg *segp, float f)
{
int nhops = segp->s_delta * x->x_ksr + 0.5; /* LATER rethink */
segp->s_ccinput = f;
segp->s_nhops = (nhops > 0 ? nhops : 0);
clccurve_coefs(segp->s_nhops, (double)f, &segp->s_bb, &segp->s_mm);
#ifdef CURVE_DEBUG
post("%g %g %g %g",
segp->s_target, segp->s_delta, segp->s_bb, segp->s_mm);
#endif
}
static void curve_tick(t_curve *x)
{
outlet_bang(x->x_bangout);
#ifdef CURVE_DEBUG
post("exit point %d, after %d retarget calls",
x->dbg_exitpoint, x->dbg_nretargets);
post("at value %g, after last %d nhops, with bb %g, mm %g",
x->x_value, x->dbg_nhops, x->x_bb, x->x_mm);
x->dbg_nretargets = x->dbg_exitpoint = x->dbg_nhops = 0;
#endif
}
static t_int *curve_perform(t_int *w)
{
t_curve *x = (t_curve *)(w[1]);
t_float *out = (t_float *)(w[2]);
int nblock = (int)(w[3]);
int nxfer = x->x_nleft;
float curval = x->x_value;
double vv = x->x_vv;
double bb = x->x_bb;
double mm = x->x_mm;
float dy = x->x_dy;
float y0 = x->x_y0;
if (PD_BADFLOAT(curval)) /* LATER rethink */
curval = x->x_value = 0;
retarget:
if (x->x_retarget)
{
float target = x->x_curseg->s_target;
float delta = x->x_curseg->s_delta;
int nhops = x->x_curseg->s_nhops;
bb = x->x_curseg->s_bb;
mm = x->x_curseg->s_mm;
if (x->x_curseg->s_ccinput < 0)
dy = x->x_value - target;
else
dy = target - x->x_value;
#ifdef CURVE_DEBUG
x->dbg_nretargets++;
#endif
x->x_nsegs--;
x->x_curseg++;
while (nhops <= 0)
{
curval = x->x_value = target;
if (x->x_nsegs)
{
target = x->x_curseg->s_target;
delta = x->x_curseg->s_delta;
nhops = x->x_curseg->s_nhops;
bb = x->x_curseg->s_bb;
mm = x->x_curseg->s_mm;
if (x->x_curseg->s_ccinput < 0)
dy = x->x_value - target;
else
dy = target - x->x_value;
x->x_nsegs--;
x->x_curseg++;
}
else
{
while (nblock--) *out++ = curval;
x->x_nleft = 0;
#ifdef CURVE_DEBUG
x->dbg_exitpoint = 1;
#endif
clock_delay(x->x_clock, 0);
x->x_retarget = 0;
return (w + 4);
}
}
nxfer = x->x_nleft = nhops;
x->x_vv = vv = bb;
x->x_bb = bb;
x->x_mm = mm;
x->x_dy = dy;
x->x_y0 = y0 = x->x_value;
x->x_target = target;
x->x_retarget = 0;
#ifdef CURVE_DEBUG
x->dbg_nhops = nhops;
#endif
}
if (nxfer >= nblock)
{
int silly = ((x->x_nleft -= nblock) == 0); /* LATER rethink */
while (nblock--)
{
*out++ = curval = (vv - bb) * dy + y0;
vv *= mm;
}
if (silly)
{
if (x->x_nsegs) x->x_retarget = 1;
else
{
#ifdef CURVE_DEBUG
x->dbg_exitpoint = 2;
#endif
clock_delay(x->x_clock, 0);
}
x->x_value = x->x_target;
}
else
{
x->x_value = curval;
x->x_vv = vv;
}
}
else if (nxfer > 0)
{
nblock -= nxfer;
do
*out++ = (vv - bb) * dy + y0, vv *= mm;
while (--nxfer);
curval = x->x_value = x->x_target;
if (x->x_nsegs)
{
x->x_retarget = 1;
goto retarget;
}
else
{
while (nblock--) *out++ = curval;
x->x_nleft = 0;
#ifdef CURVE_DEBUG
x->dbg_exitpoint = 3;
#endif
clock_delay(x->x_clock, 0);
}
}
else while (nblock--) *out++ = curval;
return (w + 4);
}
static void curve_float(t_curve *x, t_float f)
{
if (x->x_deltaset)
{
x->x_deltaset = 0;
x->x_target = f;
x->x_nsegs = 1;
x->x_curseg = x->x_segs;
x->x_curseg->s_target = f;
x->x_curseg->s_delta = x->x_delta;
#ifdef CURVE_DEBUG
startpost("single segment: ");
#endif
curve_cc(x, x->x_curseg, x->x_ccinput);
x->x_retarget = 1;
}
else
{
x->x_value = x->x_target = f;
x->x_nsegs = 0;
x->x_curseg = 0;
x->x_nleft = 0;
x->x_retarget = 0;
}
}
/* CHECKED delta is not persistent, but ccinput is */
static void curve_ft1(t_curve *x, t_floatarg f)
{
x->x_delta = f;
x->x_deltaset = (f > 0);
}
static void curve_list(t_curve *x, t_symbol *s, int ac, t_atom *av)
{
int natoms, nsegs, odd;
t_atom *ap;
t_curveseg *segp;
for (natoms = 0, ap = av; natoms < ac; natoms++, ap++)
{
if (ap->a_type != A_FLOAT)
{
loud_messarg((t_pd *)x, &s_list); /* CHECKED */
return; /* CHECKED */
}
}
if (!natoms)
return; /* CHECKED */
odd = natoms % 3;
nsegs = natoms / 3;
if (odd) nsegs++;
if (nsegs > x->x_size)
{
int ns = nsegs;
x->x_segs = grow_nodata(&ns, &x->x_size, x->x_segs,
CURVE_INISIZE, x->x_segini,
sizeof(*x->x_segs));
if (ns < nsegs)
{
natoms = ns * 3;
nsegs = ns;
odd = 0;
}
}
x->x_nsegs = nsegs;
#ifdef CURVE_DEBUG
post("%d segments:", x->x_nsegs);
#endif
segp = x->x_segs;
if (odd) nsegs--;
while (nsegs--)
{
segp->s_target = av++->a_w.w_float;
segp->s_delta = av++->a_w.w_float;
curve_cc(x, segp, av++->a_w.w_float);
segp++;
}
if (odd)
{
segp->s_target = av->a_w.w_float;
if (odd > 1)
segp->s_delta = av[1].a_w.w_float;
else
segp->s_delta = 0;
curve_cc(x, segp, 0.);
}
x->x_deltaset = 0;
x->x_target = x->x_segs->s_target;
x->x_curseg = x->x_segs;
x->x_retarget = 1;
}
/* CHECKED no stop, pity... */
#if 0
static void curve_stop(t_curve *x)
{
x->x_target = x->x_value;
x->x_nleft = 0;
x->x_retarget = 0;
x->x_nsegs = 0;
x->x_curseg = 0;
}
#endif
static void curve_dsp(t_curve *x, t_signal **sp)
{
float ksr = sp[0]->s_sr * 0.001;
if (ksr != x->x_ksr)
{
int nsegs = x->x_nsegs;
t_curveseg *segp = x->x_segs;
x->x_ksr = ksr;
while (nsegs--)
{
curve_cc(x, segp, segp->s_ccinput);
segp++;
}
}
dsp_add(curve_perform, 3, x, sp[0]->s_vec, sp[0]->s_n);
}
static void curve_free(t_curve *x)
{
if (x->x_segs != x->x_segini)
freebytes(x->x_segs, x->x_size * sizeof(*x->x_segs));
if (x->x_clock) clock_free(x->x_clock);
}
static void *curve_new(t_floatarg f1, t_floatarg f2)
{
t_curve *x = (t_curve *)pd_new(curve_class);
x->x_value = x->x_target = f1;
x->x_ccinput = f2;
x->x_deltaset = 0;
x->x_ksr = sys_getsr() * 0.001;
x->x_nleft = 0;
x->x_retarget = 0;
x->x_size = CURVE_INISIZE;
x->x_nsegs = 0;
x->x_segs = x->x_segini;
x->x_curseg = 0;
inlet_new((t_object *)x, (t_pd *)x, &s_float, gensym("ft1"));
floatinlet_new((t_object *)x, &x->x_ccinput);
outlet_new((t_object *)x, &s_signal);
x->x_bangout = outlet_new((t_object *)x, &s_bang);
x->x_clock = clock_new(x, (t_method)curve_tick);
return (x);
}
void curve_tilde_setup(void)
{
curve_class = class_new(gensym("curve~"),
(t_newmethod)curve_new,
(t_method)curve_free,
sizeof(t_curve), 0,
A_DEFFLOAT, A_DEFFLOAT, 0);
sic_setup(curve_class, curve_dsp, SIC_NOMAINSIGNALIN);
class_addfloat(curve_class, curve_float);
class_addlist(curve_class, curve_list);
class_addmethod(curve_class, (t_method)curve_ft1,
gensym("ft1"), A_FLOAT, 0);
}
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