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/* (C) Oswald Berthold <opt@web.fm> */
#include "math.h"
#include <m_pd.h>
/* ----------------------------- mixer ----------------------------- */
static t_class *mixer_class;
typedef struct _mixer
{
t_object x_obj;
t_int x_n;
t_float* x_m;
} t_mixer;
static void *mixer_new(t_symbol *s, t_floatarg num)
{
int i;
t_mixer *x = (t_mixer *)pd_new(mixer_class);
if (num < 1) x->x_n = 1;
else x->x_n = (int) num;
x->x_m = getbytes(sizeof(t_float)*x->x_n);
for (i=0;i<x->x_n /* - 1 */ ;i++) {
inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_signal, &s_signal);
x->x_m[i] = 1.;
}
outlet_new(&x->x_obj, &s_signal);
return (x);
}
void mixer_list(t_mixer* x,t_symbol* s,t_int argc, t_atom* argv)
{
int chan;
t_float val;
if (argc != 2) {
post("unknown");
return;
}
chan = (int) atom_getfloat(argv++);
val = atom_getfloat(argv++);
x->x_m[chan] = val;
}
t_int *mixer_perform(t_int *w)
{
t_mixer* x = (t_mixer*) (w[1]);
int n = (int)(w[2]);
t_float **in = getbytes(sizeof(float)*x->x_n);
t_float *out;
int i,j;
int offset = 3;
for (i=0;i < x->x_n;i++) {
in[i] = (t_float *)(w[offset+i]);
}
out = (t_float *)(w[offset+i]);
while (n--) {
*out = 0.;
for (j=0;j<x->x_n;j++) {
*out += *(in[j]++) * x->x_m[j];
}
out++;
}
return (w+offset+1+i);
}
static void mixer_dsp(t_mixer *x, t_signal **sp)
{
int i;
t_int** myvec = getbytes(sizeof(t_int)*(x->x_n + 3));
myvec[0] = (t_int*)x;
myvec[1] = (t_int*)sp[0]->s_n;
for (i=0;i < x->x_n+1;i++)
myvec[2 + i] = (t_int*)sp[i]->s_vec;
dsp_addv(mixer_perform, x->x_n + 3, (t_int*)myvec);
freebytes(myvec,sizeof(t_int)*(x->x_n + 3));
}
void mixer_tilde_setup(void)
{
mixer_class = class_new(gensym("mixer~"), (t_newmethod)mixer_new, 0,
sizeof(t_mixer), 0, A_DEFFLOAT, A_DEFSYM,A_NULL);
class_addmethod(mixer_class, nullfn, gensym("signal"), 0);
class_addmethod(mixer_class, (t_method)mixer_dsp, gensym("dsp"), 0);
class_addlist(mixer_class,mixer_list);
}
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