526b5580da
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21070 a1c6a512-1295-4272-9138-f99709370657
93 lines
2.1 KiB
C
93 lines
2.1 KiB
C
#include <m_pd.h>
|
|
#include <m_fixed.h>
|
|
|
|
typedef struct hipctl
|
|
{
|
|
t_sample c_x;
|
|
t_sample c_coef;
|
|
} t_hipctl;
|
|
|
|
typedef struct sighip
|
|
{
|
|
t_object x_obj;
|
|
float x_sr;
|
|
float x_hz;
|
|
t_hipctl x_cspace;
|
|
t_hipctl *x_ctl;
|
|
float x_f;
|
|
} t_sighip;
|
|
|
|
t_class *sighip_class;
|
|
static void sighip_ft1(t_sighip *x, t_floatarg f);
|
|
|
|
static void *sighip_new(t_floatarg f)
|
|
{
|
|
t_sighip *x = (t_sighip *)pd_new(sighip_class);
|
|
inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("float"), gensym("ft1"));
|
|
outlet_new(&x->x_obj, gensym("signal"));
|
|
x->x_sr = 44100;
|
|
x->x_ctl = &x->x_cspace;
|
|
x->x_cspace.c_x = 0;
|
|
sighip_ft1(x, f);
|
|
x->x_f = 0;
|
|
return (x);
|
|
}
|
|
|
|
static void sighip_ft1(t_sighip *x, t_floatarg f)
|
|
{
|
|
t_float coeff;
|
|
if (f < 0.001) f = 10;
|
|
x->x_hz = f;
|
|
coeff = 1 - f * (2 * 3.14159) / x->x_sr;
|
|
if (coeff < 0) coeff = 0;
|
|
x->x_ctl->c_coef = ftofix(coeff);
|
|
}
|
|
|
|
static t_int *sighip_perform(t_int *w)
|
|
{
|
|
t_sample *in = (t_sample *)(w[1]);
|
|
t_sample *out = (t_sample *)(w[2]);
|
|
t_hipctl *c = (t_hipctl *)(w[3]);
|
|
int n = (t_int)(w[4]);
|
|
int i;
|
|
t_sample last = c->c_x;
|
|
t_sample coef = c->c_coef;
|
|
for (i = 0; i < n; i++)
|
|
{
|
|
t_sample new = *in++ + mult(coef,last);
|
|
*out++ = new - last;
|
|
last = new;
|
|
}
|
|
if (PD_BADFLOAT(last))
|
|
last = 0;
|
|
c->c_x = last;
|
|
return (w+5);
|
|
}
|
|
|
|
static void sighip_dsp(t_sighip *x, t_signal **sp)
|
|
{
|
|
x->x_sr = sp[0]->s_sr;
|
|
sighip_ft1(x, x->x_hz);
|
|
dsp_add(sighip_perform, 4,
|
|
sp[0]->s_vec, sp[1]->s_vec,
|
|
x->x_ctl, sp[0]->s_n);
|
|
|
|
}
|
|
|
|
static void sighip_clear(t_sighip *x, t_floatarg q)
|
|
{
|
|
x->x_cspace.c_x = 0;
|
|
}
|
|
|
|
void hip_tilde_setup(void)
|
|
{
|
|
sighip_class = class_new(gensym("hip~"), (t_newmethod)sighip_new, 0,
|
|
sizeof(t_sighip), 0, A_DEFFLOAT, 0);
|
|
CLASS_MAINSIGNALIN(sighip_class, t_sighip, x_f);
|
|
class_addmethod(sighip_class, (t_method)sighip_dsp, gensym("dsp"), 0);
|
|
class_addmethod(sighip_class, (t_method)sighip_ft1,
|
|
gensym("ft1"), A_FLOAT, 0);
|
|
class_addmethod(sighip_class, (t_method)sighip_clear, gensym("clear"), 0);
|
|
class_sethelpsymbol(sighip_class, gensym("lop~-help.pd"));
|
|
}
|
|
|