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#include <m_pd.h>
#include <m_fixed.h>
static t_class *vsnapshot_tilde_class;
typedef struct _vsnapshot
{
t_object x_obj;
int x_n;
int x_gotone;
t_sample *x_vec;
float x_f;
float x_sampspermsec;
double x_time;
} t_vsnapshot;
static void *vsnapshot_tilde_new(void)
{
t_vsnapshot *x = (t_vsnapshot *)pd_new(vsnapshot_tilde_class);
outlet_new(&x->x_obj, &s_float);
x->x_f = 0;
x->x_n = 0;
x->x_vec = 0;
x->x_gotone = 0;
return (x);
}
static t_int *vsnapshot_tilde_perform(t_int *w)
{
t_sample *in = (t_sample *)(w[1]);
t_vsnapshot *x = (t_vsnapshot *)(w[2]);
t_sample *out = x->x_vec;
int n = x->x_n, i;
for (i = 0; i < n; i++)
out[i] = in[i];
x->x_time = clock_getlogicaltime();
x->x_gotone = 1;
return (w+3);
}
static void vsnapshot_tilde_dsp(t_vsnapshot *x, t_signal **sp)
{
int n = sp[0]->s_n;
if (n != x->x_n)
{
if (x->x_vec)
t_freebytes(x->x_vec, x->x_n * sizeof(t_sample));
x->x_vec = (t_sample *)getbytes(n * sizeof(t_sample));
x->x_gotone = 0;
x->x_n = n;
}
x->x_sampspermsec = sp[0]->s_sr / 1000;
dsp_add(vsnapshot_tilde_perform, 2, sp[0]->s_vec, x);
}
static void vsnapshot_tilde_bang(t_vsnapshot *x)
{
float val;
if (x->x_gotone)
{
int indx = clock_gettimesince(x->x_time) * x->x_sampspermsec;
if (indx < 0)
indx = 0;
else if (indx >= x->x_n)
indx = x->x_n - 1;
val = x->x_vec[indx];
}
else val = 0;
outlet_float(x->x_obj.ob_outlet, val);
}
static void vsnapshot_tilde_ff(t_vsnapshot *x)
{
if (x->x_vec)
t_freebytes(x->x_vec, x->x_n * sizeof(t_sample));
}
void vsnapshot_tilde_setup(void)
{
vsnapshot_tilde_class = class_new(gensym("vsnapshot~"),
vsnapshot_tilde_new, (t_method)vsnapshot_tilde_ff,
sizeof(t_vsnapshot), 0, 0);
CLASS_MAINSIGNALIN(vsnapshot_tilde_class, t_vsnapshot, x_f);
class_addmethod(vsnapshot_tilde_class, (t_method)vsnapshot_tilde_dsp, gensym("dsp"), 0);
class_addbang(vsnapshot_tilde_class, vsnapshot_tilde_bang);
}
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