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/* Copyright (c) 1997-1999 Miller Puckette.
* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution. */
/* send~, delread~, throw~, catch~ */
#include "m_pd.h"
#include "delwrite~.h"
static t_class *sigdelread_class;
typedef struct _sigdelread
{
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 */
int x_zerodel; /* 0 or vecsize depending on read/write order */
} t_sigdelread;
static void sigdelread_float(t_sigdelread *x, t_float f);
static void *sigdelread_new(t_symbol *s, t_floatarg f)
{
t_sigdelread *x = (t_sigdelread *)pd_new(sigdelread_class);
x->x_sym = s;
x->x_sr = 1;
x->x_n = 1;
x->x_zerodel = 0;
sigdelread_float(x, f);
outlet_new(&x->x_obj, &s_signal);
return (x);
}
static void sigdelread_float(t_sigdelread *x, t_float f)
{
int samps;
t_sigdelwrite *delwriter =
(t_sigdelwrite *)pd_findbyclass(x->x_sym, sigdelwrite_class);
x->x_deltime = f;
if (delwriter)
{
int delsize = delwriter->x_cspace.c_n;
x->x_delsamps = (int)(0.5 + 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 - DEFDELVS)
x->x_delsamps = delwriter->x_cspace.c_n - DEFDELVS;
}
}
static t_int *sigdelread_perform(t_int *w)
{
t_sample *out = (t_sample *)(w[1]);
t_delwritectl *c = (t_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 + XTRASAMPS);
if (phase < 0) phase += nsamps;
bp = vp + phase;
while (n--)
{
*out++ = *bp++;
if (bp == ep) bp -= nsamps;
}
return (w+5);
}
static void sigdelread_dsp(t_sigdelread *x, t_signal **sp)
{
t_sigdelwrite *delwriter =
(t_sigdelwrite *)pd_findbyclass(x->x_sym, sigdelwrite_class);
x->x_sr = sp[0]->s_sr * 0.001;
x->x_n = sp[0]->s_n;
if (delwriter)
{
sigdelwrite_checkvecsize(delwriter, sp[0]->s_n);
x->x_zerodel = (delwriter->x_sortno == ugen_getsortno() ?
0 : delwriter->x_vecsize);
sigdelread_float(x, x->x_deltime);
dsp_add(sigdelread_perform, 4,
sp[0]->s_vec, &delwriter->x_cspace, &x->x_delsamps, sp[0]->s_n);
}
else if (*x->x_sym->s_name)
error("delread~: %s: no such delwrite~",x->x_sym->s_name);
}
void delread_tilde_setup(void)
{
sigdelread_class = class_new(gensym("delread~"),
(t_newmethod)sigdelread_new, 0,
sizeof(t_sigdelread), 0, A_DEFSYM, A_DEFFLOAT, 0);
class_addmethod(sigdelread_class, (t_method)sigdelread_dsp,
gensym("dsp"), 0);
class_addfloat(sigdelread_class, (t_method)sigdelread_float);
}
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