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#include "../src/m_pd.h"
#include "../src/m_fixed.h"
static t_class *tabosc4_tilde_class;
typedef struct _tabosc4_tilde
{
t_object x_obj;
int x_fnpoints;
int x_lognpoints;
t_sample *x_vec;
t_symbol *x_arrayname;
t_sample x_f;
unsigned int x_phase;
t_sample x_conv;
} t_tabosc4_tilde;
static void *tabosc4_tilde_new(t_symbol *s)
{
t_tabosc4_tilde *x = (t_tabosc4_tilde *)pd_new(tabosc4_tilde_class);
x->x_arrayname = s;
x->x_vec = 0;
x->x_fnpoints = 512;
outlet_new(&x->x_obj, gensym("signal"));
inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft1"));
x->x_f = 0;
post("new done");
return (x);
}
static t_int *tabosc4_tilde_perform(t_int *w)
{
t_tabosc4_tilde *x = (t_tabosc4_tilde *)(w[1]);
t_sample *in = (t_sample *)(w[2]);
t_sample *out = (t_sample *)(w[3]);
int n = (int)(w[4]);
t_sample *tab = x->x_vec;
unsigned int phase = x->x_phase;
int conv = x->x_conv;
int off;
int frac;
int logp = x->x_lognpoints;
if (!tab) goto zero;
while (n--) {
t_sample f2;
phase+= mult(conv ,(*in++));
phase &= (itofix(1) -1);
off = fixtoi((long long)phase<<logp);
#ifdef NO_INTERPOLATION
*out = *(tab+off);
#else
frac = phase & ((1<<logp)-1);
frac <<= (fix1-logp);
f2 = (off == x->x_fnpoints) ?
mult(*(tab),frac) :
mult(*(tab + off + 1),frac);
*out = mult(*(tab + off),(itofix(1) - frac)) + f2;
#endif
out++;
}
x->x_phase = phase;
return (w+5);
zero:
while (n--) *out++ = 0;
return (w+5);
}
void tabosc4_tilde_set(t_tabosc4_tilde *x, t_symbol *s)
{
t_garray *a;
#ifdef ROCKBOX
int pointsinarray;
#else
int npoints, pointsinarray;
#endif
x->x_arrayname = s;
if (!(a = (t_garray *)pd_findbyclass(x->x_arrayname, garray_class)))
{
if (*s->s_name)
pd_error(x, "tabosc4~: %s: no such array", x->x_arrayname->s_name);
x->x_vec = 0;
}
else if (!garray_getfloatarray(a, &pointsinarray, &x->x_vec))
{
pd_error(x, "%s: bad template for tabosc4~", x->x_arrayname->s_name);
x->x_vec = 0;
}
else
{
#ifndef ROCKBOX
int i;
#endif
x->x_fnpoints = pointsinarray;
x->x_lognpoints = ilog2(pointsinarray);
post("tabosc~: using %d (log %d) points of array",x->x_fnpoints,x->x_lognpoints);
garray_usedindsp(a);
}
}
static void tabosc4_tilde_ft1(t_tabosc4_tilde *x, t_float f)
{
x->x_phase = f;
}
static void tabosc4_tilde_dsp(t_tabosc4_tilde *x, t_signal **sp)
{
x->x_conv = ftofix(1000.)/sp[0]->s_sr;
x->x_conv = mult(x->x_conv + 500,ftofix(0.001));
tabosc4_tilde_set(x, x->x_arrayname);
dsp_add(tabosc4_tilde_perform, 4, x,
sp[0]->s_vec, sp[1]->s_vec, sp[0]->s_n);
}
void tabosc4_tilde_setup(void)
{
tabosc4_tilde_class = class_new(gensym("tabosc4~"),
(t_newmethod)tabosc4_tilde_new, 0,
sizeof(t_tabosc4_tilde), 0, A_DEFSYM, 0);
CLASS_MAINSIGNALIN(tabosc4_tilde_class, t_tabosc4_tilde, x_f);
class_addmethod(tabosc4_tilde_class, (t_method)tabosc4_tilde_dsp,
gensym("dsp"), 0);
class_addmethod(tabosc4_tilde_class, (t_method)tabosc4_tilde_set,
gensym("set"), A_SYMBOL, 0);
class_addmethod(tabosc4_tilde_class, (t_method)tabosc4_tilde_ft1,
gensym("ft1"), A_FLOAT, 0);
}
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