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#include <m_pd.h>
#include <m_fixed.h>
#include "cos_table.h"
/* ------------------------ osc~ ----------------------------- */
#ifdef ROCKBOX
static t_class *osc_class;
#else
static t_class *osc_class, *scalarosc_class;
#endif
typedef struct _osc
{
t_object x_obj;
unsigned int x_phase;
t_sample x_conv;
t_sample x_f; /* frequency if scalar */
} t_osc;
static void *osc_new(t_floatarg f)
{
t_osc *x = (t_osc *)pd_new(osc_class);
x->x_f = ftofix(f);
outlet_new(&x->x_obj, gensym("signal"));
inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft1"));
x->x_phase = 0;
x->x_conv = 0;
return (x);
}
static t_int *osc_perform(t_int *w)
{
t_osc *x = (t_osc *)(w[1]);
t_sample *in = (t_sample *)(w[2]);
t_sample *out = (t_sample *)(w[3]);
int n = (int)(w[4]);
t_sample *tab = cos_table;
unsigned int phase = x->x_phase;
int conv = x->x_conv;
int off;
int frac;
while (n--) {
phase+= mult(conv ,(*in++));
phase &= (itofix(1) -1);
off = fixtoi((long long)phase<<ILOGCOSTABSIZE);
#ifdef NO_INTERPOLATION
*out = *(tab+off);
#else
// frac = phase & (itofix(1)-1);
frac = phase & ((1<<ILOGCOSTABSIZE)-1);
frac <<= (fix1-ILOGCOSTABSIZE);
*out = mult(*(tab + off),(itofix(1) - frac)) +
mult(*(tab + off + 1),frac);
#endif
out++;
}
x->x_phase = phase;
return (w+5);
}
static void osc_dsp(t_osc *x, t_signal **sp)
{
post("samplerate %f",sp[0]->s_sr);
x->x_conv = ftofix(1000.)/sp[0]->s_sr;
post("conf %d",x->x_conv);
x->x_conv = mult(x->x_conv + 500,ftofix(0.001));
post("conf %d",x->x_conv);
dsp_add(osc_perform, 4, x, sp[0]->s_vec, sp[1]->s_vec, sp[0]->s_n);
}
static void osc_ft1(t_osc *x, t_float f)
{
x->x_phase = ftofix(f); /* *2 ??? */
}
void osc_tilde_setup(void)
{
osc_class = class_new(gensym("osc~"), (t_newmethod)osc_new, 0,
sizeof(t_osc), 0, A_DEFFLOAT, 0);
CLASS_MAINSIGNALIN(osc_class, t_osc, x_f);
class_addmethod(osc_class, (t_method)osc_dsp, gensym("dsp"), 0);
class_addmethod(osc_class, (t_method)osc_ft1, gensym("ft1"), A_FLOAT, 0);
}
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