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/******************************************************
*
* zexy - implementation file
*
* copyleft (c) IOhannes m zmölnig
*
* 1999:forum::für::umläute:2004
*
* institute of electronic music and acoustics (iem)
*
******************************************************
*
* license: GNU General Public License v.2
*
******************************************************/
/* 0109:forum::für::umläute:2000
unpack~ :: convert float-(package)-inputs to signals
*/
/* ---------------------------- unpack~ ----------------------------- */
/* unpack a sequence of float-package to a signal-vector */
#include "zexy.h"
static t_class *sigunpack_class;
typedef struct _sigunpack
{
t_object x_obj;
t_sample *buffer;
t_sample *rp, *wp;
int bufsize;
} t_sigunpack;
static void sigunpack_float(t_sigunpack *x, t_float f)
{
if (x->wp + 1 != x->rp) {
*(x->wp)++ = f;
if (x->wp == x->buffer + x->bufsize) x->wp = x->buffer;
}
}
static void sigunpack_list(t_sigunpack *x, t_symbol *s, int argc, t_atom *argv)
{
t_atom *ap = argv;
int i;
for (i = 0, ap = argv; i < argc; ap++, i++) {
if (x->wp + 1 != x->rp) {
*(x->wp)++ = atom_getfloat(ap);
if (x->wp == x->buffer + x->bufsize) x->wp = x->buffer;
}
}
}
static t_int *sigunpack_perform(t_int *w)
{
t_sample *out = (t_sample *)(w[1]);
t_sigunpack *x = (t_sigunpack *)w[2];
int n = (int)(w[3]);
t_sample *buf = x->rp;
int hitchhike = 0;
if ((x->wp >= x->rp) && (x->wp < x->rp+n)) hitchhike=1;
x->rp += n;
if (x->rp == x->buffer + x->bufsize) x->rp = x->buffer;
if (hitchhike) x->wp = x->rp;
while (n--) {
*out++ = *buf;
*buf++ = 0;
}
return (w+4);
}
static void sigunpack_dsp(t_sigunpack *x, t_signal **sp)
{
if (x->bufsize % sp[0]->s_n) {
int newsize = sp[0]->s_n*(1+(int)(x->bufsize/sp[0]->s_n));
freebytes(x->buffer, x->bufsize * sizeof(*x->buffer));
x->buffer = (t_sample *)getbytes(newsize * sizeof(*x->buffer));
x->rp = x->wp = x->buffer;
x->bufsize = newsize;
}
dsp_add(sigunpack_perform, 3, sp[0]->s_vec, x, sp[0]->s_n);
}
static void *sigunpack_new(t_floatarg f)
{
t_sigunpack *x = (t_sigunpack *)pd_new(sigunpack_class);
int suggestedsize = (int)f;
int bufsize;
if (!suggestedsize) bufsize = 64;
else bufsize = (suggestedsize % 64)?(64*(1+(int)(suggestedsize/64))):suggestedsize;
x->buffer = (t_sample *)getbytes(bufsize * sizeof(*x->buffer));
x->bufsize = bufsize;
x->rp = x->wp = x->buffer;
outlet_new(&x->x_obj, gensym("signal"));
return (x);
}
static void sigunpack_help(void)
{
post("unpack~\t:: outputs a sequence of floats as a signal");
}
void unpack_tilde_setup(void)
{
sigunpack_class = class_new(gensym("unpack~"), (t_newmethod)sigunpack_new, 0,
sizeof(t_sigunpack), 0, A_DEFFLOAT, 0);
class_addmethod(sigunpack_class, (t_method)sigunpack_dsp, gensym("dsp"), 0);
class_addfloat(sigunpack_class, (t_method)sigunpack_float);
class_addlist (sigunpack_class, (t_method)sigunpack_list);
class_addmethod(sigunpack_class, (t_method)sigunpack_help, gensym("help"), 0);
zexy_register("unpack~");
}
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