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/* Copyright (c) 2002-2003 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 <string.h>
#include "m_pd.h"
#include "sickle/sic.h"
#include "sickle/arsic.h"
/* CHECKME (the refman): the extra channels are not played */
typedef struct _wave
{
t_arsic x_arsic;
int x_nointerp;
} t_wave;
static t_class *wave_class;
static void wave_interp(t_wave *x, t_floatarg f)
{
x->x_nointerp = (f == 0);
arsic_setminsize((t_arsic *)x, (x->x_nointerp ? 1 : 4));
arsic_check((t_arsic *)x);
}
static void wave_set(t_wave *x, t_symbol *s)
{
arsic_setarray((t_arsic *)x, s, 1);
}
static t_int *wave_perform(t_int *w)
{
t_arsic *sic = (t_arsic *)(w[1]);
int nblock = (int)(w[2]);
int nch = sic->s_nchannels;
t_int *outp = w + 6;
if (sic->s_playable)
{
t_wave *x = (t_wave *)sic;
t_float *xin = (t_float *)(w[3]);
t_float *sin = (t_float *)(w[4]);
t_float *ein = (t_float *)(w[5]);
int vecsize = sic->s_vecsize;
t_float **vectable = sic->s_vectors;
float ksr = sic->s_ksr;
int nointerp = x->x_nointerp;
int maxindex = (nointerp ? vecsize - 1 : vecsize - 3);
int iblock;
for (iblock = 0; iblock < nblock; iblock++)
{
float spos = *sin++ * ksr;
float xpos = *ein++ * ksr;
/* msp seems to be buggy here, but CHECKME again */
int siz = (int)((xpos > 0 ? xpos : maxindex) - spos);
float phase = *xin++;
int ndx;
int ch = nch;
/* CHECKED: phase is clipped, not wrapped */
if (phase < 0) phase = 0;
else if (phase > 1.0) phase = 1.0;
xpos = (siz > 0 ? spos + siz * phase : spos);
ndx = (int)xpos;
if (nointerp)
{
if (ndx < 0) ndx = 0;
else if (ndx > maxindex) ndx = maxindex;
while (ch--)
{
t_float *vp = vectable[ch];
t_float *out = (t_float *)(outp[ch]);
out[iblock] = (vp ? vp[ndx] : 0);
}
}
else
{
float frac, a, b, c, d, cminusb;
if (ndx < 1)
ndx = 1, frac = 0;
else if (ndx > maxindex)
ndx = maxindex, frac = 1;
else frac = xpos - ndx;
while (ch--)
{
t_float *vp = vectable[ch];
t_float *out = (t_float *)(outp[ch]);
if (vp)
{
vp += ndx;
a = vp[-1];
b = vp[0];
c = vp[1];
d = vp[2];
cminusb = c-b;
out[iblock] = b + frac * (
cminusb - 0.1666667f * (1. - frac) * (
(d - a - 3.0f * cminusb) * frac
+ (d + 2.0f * a - 3.0f * b)
)
);
}
else out[iblock] = 0;
}
}
}
}
else
{
int ch = nch;
while (ch--)
{
t_float *out = (t_float *)outp[ch];
int n = nblock;
while (n--) *out++ = 0;
}
}
return (w + sic->s_nperfargs + 1);
}
static void wave_dsp(t_wave *x, t_signal **sp)
{
arsic_dsp((t_arsic *)x, sp, wave_perform, 1);
}
static void wave_free(t_wave *x)
{
arsic_free((t_arsic *)x);
}
static void *wave_new(t_symbol *s, t_floatarg f1, t_floatarg f2, t_floatarg f3)
{
/* three auxiliary signals: phase, clipstart, and clipend inputs */
t_wave *x = (t_wave *)arsic_new(wave_class, s, (int)f3, 0, 3);
if (x)
{
int nch = arsic_getnchannels((t_arsic *)x);
if (f1 < 0) f1 = 0;
if (f2 < 0) f2 = 0;
sic_newinlet((t_sic *)x, f1);
sic_newinlet((t_sic *)x, f2);
while (nch--)
outlet_new((t_object *)x, &s_signal);
wave_interp(x, 1);
}
return (x);
}
void wave_tilde_setup(void)
{
wave_class = class_new(gensym("wave~"),
(t_newmethod)wave_new,
(t_method)wave_free,
sizeof(t_wave), 0,
A_DEFSYM, A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, 0);
arsic_setup(wave_class, wave_dsp, SIC_FLOATTOSIGNAL);
class_addmethod(wave_class, (t_method)wave_set,
gensym("set"), A_SYMBOL, 0);
class_addmethod(wave_class, (t_method)wave_interp,
gensym("interp"), A_FLOAT, 0);
}
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