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delreadc~.c
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#include "shadylib.h"
/*modified from pd source code */
/* ----------------------------- delreadc~ ----------------------------- */
static t_class *sigdelreadc_class;
typedef struct _sigdelreadc
{
t_object x_obj;
t_symbol *x_sym;
t_float x_deltime; /* delay in msec */
int x_delsamps; /* delay in samples */
t_float x_sr; /* samples per msec */
t_float x_n; /* vector size */
t_shadylib_delwritectl *x_cspace; /* pointer to the current delwritec~ ctl*/
int x_zerodel; /* 0 or vecsize depending on read/write order */
} t_sigdelreadc;
static void sigdelreadc_float(t_sigdelreadc *x, t_float f);
static void *sigdelreadc_new(t_symbol *s, t_floatarg f)
{
t_sigdelreadc *x = (t_sigdelreadc *)pd_new(sigdelreadc_class);
x->x_sym = s;
x->x_sr = 1;
x->x_n = 1;
x->x_zerodel = 0;
sigdelreadc_float(x, f);
outlet_new(&x->x_obj, &s_signal);
return (x);
}
static void sigdelreadc_float(t_sigdelreadc *x, t_float f)
{
t_shadylib_sigdelwritec *delwriter =
(t_shadylib_sigdelwritec *)pd_findbyclass(x->x_sym, shadylib_sigdelwritec_class);
x->x_deltime = f;
if (delwriter)
{
x->x_delsamps = (int)(0.5f + x->x_sr * x->x_deltime)
+ x->x_n - x->x_zerodel;
if (x->x_delsamps < x->x_n) x->x_delsamps = x->x_n;
else if (x->x_delsamps > delwriter->x_cspace.c_n)
x->x_delsamps = delwriter->x_cspace.c_n;
}
}
static void sigdelreadc_set(t_sigdelreadc *x, t_symbol *s) {
t_shadylib_sigdelwritec *delwriter =
(t_shadylib_sigdelwritec *)pd_findbyclass(s,
shadylib_sigdelwritec_class);
if (delwriter) {
x->x_sym = s;
if(pd_getdspstate()) {
shadylib_sigdelwritec_updatesr(delwriter, x->x_sr*1000.f);
shadylib_sigdelwritec_checkvecsize(delwriter, x->x_n);
x->x_zerodel = (delwriter->x_sortno == ugen_getsortno() ?
0 : delwriter->x_vecsize);
sigdelreadc_float(x, x->x_deltime);
x->x_cspace = &delwriter->x_cspace;
}
} else if (*x->x_sym->s_name)
pd_error(x, "delreadc~: %s: no such delwritec~", s->s_name);
}
static t_int *sigdelreadc_perform(t_int *w)
{
t_sample *out = (t_sample *)(w[1]);
t_shadylib_delwritectl *c = *(t_shadylib_delwritectl **)(w[2]);
int delsamps = *(int *)(w[3]);
int n = (int)(w[4]);
int phase = c->c_phase - delsamps, nsamps = c->c_n;
t_sample *vp = c->c_vec, *bp, *ep = vp + (c->c_n + SHADYLIB_XTRASAMPS);
if (phase < 0) phase += nsamps;
bp = vp + phase;
while (n--)
{
*out++ = *bp++;
if (bp == ep) bp -= nsamps;
}
return (w+5);
}
static void sigdelreadc_dsp(t_sigdelreadc *x, t_signal **sp)
{
t_shadylib_sigdelwritec *delwriter =
(t_shadylib_sigdelwritec *)pd_findbyclass(x->x_sym,
shadylib_sigdelwritec_class);
x->x_sr = sp[0]->s_sr * 0.001;
x->x_n = sp[0]->s_n;
if (delwriter)
{
shadylib_sigdelwritec_updatesr(delwriter, sp[0]->s_sr);
shadylib_sigdelwritec_checkvecsize(delwriter, sp[0]->s_n);
x->x_zerodel = (delwriter->x_sortno == ugen_getsortno() ?
0 : delwriter->x_vecsize);
sigdelreadc_float(x, x->x_deltime);
x->x_cspace = &delwriter->x_cspace;
dsp_add(sigdelreadc_perform, 4,
sp[0]->s_vec, &x->x_cspace, &x->x_delsamps, sp[0]->s_n);
}
else if (*x->x_sym->s_name)
pd_error(x, "delreadc~: %s: no such delwritec~", x->x_sym->s_name);
}
void delreadc_tilde_setup(void)
{
sigdelreadc_class = class_new(gensym("delreadc~"),
(t_newmethod)sigdelreadc_new, 0,
sizeof(t_sigdelreadc), 0, A_DEFSYM, A_DEFFLOAT, 0);
class_addmethod(sigdelreadc_class, (t_method)sigdelreadc_dsp,
gensym("dsp"), A_CANT, 0);
class_addmethod(sigdelreadc_class, (t_method)sigdelreadc_set,
gensym("set"), A_SYMBOL, 0);
class_addfloat(sigdelreadc_class, (t_method)sigdelreadc_float);
}