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// sigpack
// for
// pure-data
// by weiss
// www.weiss-archiv.de
#include "m_pd.h"
#ifdef _MSC_VER
#pragma warning( disable : 4244 )
#pragma warning( disable : 4305 )
#endif
// ------------------------ impulse~ -----------------------------
// non-bandlimited single-sample impulses
// code from swh_plugins by steve harris www.plugin.org.uk
static t_class *impulse_tilde_class;
typedef struct _impulse_tilde
{
t_object x_obj;
t_sample x_phase;
t_sample x_sample_rate;
float x_f;
} t_impulse_tilde;
static void *impulse_tilde_new(t_floatarg f)
{
t_impulse_tilde *x = (t_impulse_tilde *)pd_new(impulse_tilde_class);
x->x_f = f;
x->x_phase = 0.f;
x->x_sample_rate = sys_getsr();//later put this in impulse_tilde_dsp???
outlet_new(&x->x_obj, gensym("signal"));
inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft1"));
return (x);
}
static t_int *impulse_tilde_perform(t_int *w)
{
t_impulse_tilde *x = (t_impulse_tilde *)(w[1]);
t_float *in = (t_float *)(w[2]);
t_float *out = (t_float *)(w[3]);
int n = (int)(w[4]);
float f, phase_step, value;
while (n--)
{
f = *(in++);
phase_step = f / x->x_sample_rate;
if (x->x_phase > 1.f) {
x->x_phase -= 1.f;
value = 1.f;
} else {
value = 0.f;
}
*out++ = value;
x->x_phase += phase_step;
}
return (w+5);
}
static void impulse_tilde_ft1(t_impulse_tilde *x, t_float f)
{
x->x_phase = f;
}
static void impulse_tilde_dsp(t_impulse_tilde *x, t_signal **sp)
{
dsp_add(impulse_tilde_perform, 4, x, sp[0]->s_vec, sp[1]->s_vec, sp[0]->s_n);
}
void impulse_tilde_setup(void)
{
impulse_tilde_class = class_new(gensym("impulse~"), (t_newmethod)impulse_tilde_new, 0,
sizeof(t_impulse_tilde), 0, A_DEFFLOAT, 0);
CLASS_MAINSIGNALIN(impulse_tilde_class, t_impulse_tilde, x_f);
class_addmethod(impulse_tilde_class, (t_method)impulse_tilde_dsp, gensym("dsp"), 0);
class_addmethod(impulse_tilde_class, (t_method)impulse_tilde_ft1, gensym("ft1"), A_FLOAT, 0);
}
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