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/* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
iem_t3_lib written by Gerhard Eckel, Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2005 */
#include "m_pd.h"
#include "iemlib.h"
/* -------------------------- sigt3_sig~ ------------------------------ */
static t_class *sigt3_sig_class;
typedef struct _sigt3_sig
{
t_object x_obj;
t_clock *x_clock;
t_float x_old_val;
t_float x_new_val;
t_float *x_beg;
int x_n;
int x_t3_bang_samps;
int x_transient;
t_float x_ms2samps;
t_float x_ticks2ms;
} t_sigt3_sig;
static void sigt3_sig_tick(t_sigt3_sig *x)
{
t_float *trans = x->x_beg, val;
int n = x->x_n, t3_bang_samps, i;
t3_bang_samps = x->x_t3_bang_samps;
if(!x->x_transient)
{
val = x->x_old_val;
for(i=0; i<t3_bang_samps; i++)
trans[i] = val;
x->x_transient = 1;
}
val = x->x_old_val = x->x_new_val;
for(i=t3_bang_samps; i<n; i++)
trans[i] = val;
}
static void sigt3_sig_stop(t_sigt3_sig *x)
{
clock_unset(x->x_clock);
x->x_new_val = x->x_old_val;
}
static void sigt3_sig_list(t_sigt3_sig *x, t_symbol *s, int ac, t_atom *av)
{
if((ac == 2)&&IS_A_FLOAT(av,0)&&IS_A_FLOAT(av,1))
{
int n = x->x_n, t3_bang_samps, ticks;
t3_bang_samps = (int)((t_float)atom_getfloatarg(0, ac, av)*x->x_ms2samps);
x->x_new_val = (t_float)atom_getfloatarg(1, ac, av);
if(t3_bang_samps < 0)
t3_bang_samps = 0;
ticks = t3_bang_samps / n;
x->x_t3_bang_samps = t3_bang_samps - n*ticks;
if(ticks < 1)
sigt3_sig_tick(x);
else
clock_delay(x->x_clock, (double)ticks * (double)x->x_ticks2ms);
}
}
static t_int *sigt3_sig_perform(t_int *w)
{
t_float *out = (t_float *)(w[1]);
t_sigt3_sig *x = (t_sigt3_sig *)(w[2]);
int n = (int)(w[3]);
if(x->x_transient)
{
t_float *trans = x->x_beg;
while(n--)
*out++ = *trans++;
x->x_transient = 0;
}
else
{
t_float val = x->x_new_val;
while(n--)
*out++ = val;
}
return (w+4);
}
static t_int *sigt3_sig_perf8(t_int *w)
{
t_float *out = (t_float *)(w[1]);
t_sigt3_sig *x = (t_sigt3_sig *)(w[2]);
int n = (int)(w[3]), i;
if(x->x_transient)
{
t_float *trans = x->x_beg;
for(i=0; i<n; i+=8, out+=8, trans+=8)
{
out[0] = trans[0];
out[1] = trans[1];
out[2] = trans[2];
out[3] = trans[3];
out[4] = trans[4];
out[5] = trans[5];
out[6] = trans[6];
out[7] = trans[7];
}
x->x_transient = 0;
}
else
{
t_float val = x->x_new_val;
for(i=0; i<n; i+=8, out+=8)
{
out[0] = val;
out[1] = val;
out[2] = val;
out[3] = val;
out[4] = val;
out[5] = val;
out[6] = val;
out[7] = val;
}
}
return (w+4);
}
static void sigt3_sig_dsp(t_sigt3_sig *x, t_signal **sp)
{
int i;
t_float *trans, val;
if(sp[0]->s_n > x->x_n)
{
freebytes(x->x_beg, x->x_n*sizeof(t_float));
x->x_n = sp[0]->s_n;
x->x_beg = (t_float *)getbytes(x->x_n*sizeof(t_float));
}
else
x->x_n = sp[0]->s_n;
x->x_ms2samps = 0.001*(t_float)sp[0]->s_sr;
x->x_ticks2ms = (t_float)x->x_n / x->x_ms2samps;
i = x->x_n;
val = x->x_new_val;
trans = x->x_beg;
while(i--)
*trans++ = val;
if((sp[0]->s_n)&7)
dsp_add(sigt3_sig_perform, 3, sp[0]->s_vec, x, sp[0]->s_n);
else
dsp_add(sigt3_sig_perf8, 3, sp[0]->s_vec, x, sp[0]->s_n);
}
static void sigt3_sig_free(t_sigt3_sig *x)
{
if(x->x_beg)
freebytes(x->x_beg, x->x_n*sizeof(t_float));
clock_free(x->x_clock);
}
static void *sigt3_sig_new(t_floatarg init_val)
{
t_sigt3_sig *x = (t_sigt3_sig *)pd_new(sigt3_sig_class);
x->x_new_val = x->x_old_val = init_val;
x->x_n = (int)sys_getblksize();
x->x_beg = (t_float *)getbytes(x->x_n*sizeof(t_float));
x->x_t3_bang_samps = x->x_transient = 0;
x->x_ms2samps = 0.001 * (t_float)sys_getsr();
x->x_ticks2ms = (t_float)x->x_n / x->x_ms2samps;
x->x_clock = clock_new(x, (t_method)sigt3_sig_tick);
outlet_new(&x->x_obj, &s_signal);
return (x);
}
void sigt3_sig_setup(void)
{
sigt3_sig_class = class_new(gensym("t3_sig~"), (t_newmethod)sigt3_sig_new,
(t_method)sigt3_sig_free, sizeof(t_sigt3_sig), 0, A_DEFFLOAT, 0);
class_addmethod(sigt3_sig_class, (t_method)sigt3_sig_dsp, gensym("dsp"), 0);
class_addmethod(sigt3_sig_class, (t_method)sigt3_sig_stop, gensym("stop"), 0);
class_addlist(sigt3_sig_class, (t_method)sigt3_sig_list);
class_sethelpsymbol(sigt3_sig_class, gensym("iemhelp/help-t3_sig~"));
}
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