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/* 0109:forum::für::umläute:2000
pack~ :: convert signals to float-packages
unpack~ :: convert float-(package)-inputs to signals
*/
#include "zexy.h"
#include <math.h>
#ifdef NT
#pragma warning( disable : 4244 )
#pragma warning( disable : 4305 )
#endif
/* ------------------------ pack~ ----------------------------- */
/* pack the signal-vector to a float-package :: ~2message */
static t_class *sigpack_class;
typedef struct _sigpack
{
t_object x_obj;
int vector_length;
t_atom *buffer;
} t_sigpack;
static t_int *sigpack_perform(t_int *w)
{
t_float *in = (t_float *)(w[1]);
t_sigpack *x = (t_sigpack *)w[2];
int n = (int)(w[3]), i = 0;
t_atom *buf = x->buffer;
while (n--) {
SETFLOAT(&buf[i], *in++);
i++;
}
outlet_list(x->x_obj.ob_outlet, &s_list, x->vector_length, x->buffer);
return (w+4);
}
static void sigpack_dsp(t_sigpack *x, t_signal **sp)
{
if (x->vector_length != sp[0]->s_n) {
freebytes(x->buffer, x->vector_length * sizeof(t_atom));
x->vector_length = sp[0]->s_n;
x->buffer = (t_atom *)getbytes(x->vector_length * sizeof(t_atom));
}
dsp_add(sigpack_perform, 3, sp[0]->s_vec, x, sp[0]->s_n);
}
static void *sigpack_new(void)
{
t_sigpack *x = (t_sigpack *)pd_new(sigpack_class);
x->vector_length = 0;
x->buffer = 0;
outlet_new(&x->x_obj, gensym("list"));
return (x);
}
static void sigpack_help(void)
{
post("pack~\t:: outputs the signal-vectors as float-packages");
}
void sigpack_setup(void)
{
sigpack_class = class_new(gensym("pack~"), (t_newmethod)sigpack_new, 0,
sizeof(t_sigpack), 0, A_DEFFLOAT, 0);
class_addmethod(sigpack_class, nullfn, gensym("signal"), 0);
class_addmethod(sigpack_class, (t_method)sigpack_dsp, gensym("dsp"), 0);
class_addmethod(sigpack_class, (t_method)sigpack_help, gensym("help"), 0);
class_sethelpsymbol(sigpack_class, gensym("zexy/pack~"));
}
/* ---------------------------- unpack~ ----------------------------- */
/* unpack a sequence of float-package to a signal-vector :: message2~ */
static t_class *sigunpack_class;
typedef struct _sigunpack
{
t_object x_obj;
t_float *buffer;
t_float *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 (ap->a_type == A_FLOAT) {
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_float *out = (t_float *)(w[1]);
t_sigunpack *x = (t_sigunpack *)w[2];
int n = (int)(w[3]);
t_float *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(t_float));
x->buffer = (t_float *)getbytes(newsize * sizeof(t_float));
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_float *)getbytes(bufsize * sizeof(t_float));
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 sigunpack_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);
class_sethelpsymbol(sigunpack_class, gensym("zexy/unpack~"));
}
/* global setup routine */
void z_sigpack_setup(void)
{
sigunpack_setup();
sigpack_setup();
}
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