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/* Copyright (c) 2002-2003 krzYszcz and others.
* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution. */
#include "m_pd.h"
#include "sickle/sic.h"
/* CHECKME for a fixed minimum deltime, if any (5ms for c74's metro) */
typedef struct _snapshot
{
t_sic x_sic;
t_float x_value;
int x_rqoffset; /* requested */
int x_offset; /* effective (truncated) */
int x_stopped;
int x_on; /* !stopped && deltime > 0 */
float x_deltime;
int x_npoints;
int x_nleft;
int x_nblock;
float x_ksr;
t_clock *x_clock;
} t_snapshot;
static t_class *snapshot_class;
static void snapshot_tick(t_snapshot *x)
{
outlet_float(((t_object *)x)->ob_outlet, x->x_value);
}
static void snapshot_bang(t_snapshot *x)
{
outlet_float(((t_object *)x)->ob_outlet, x->x_value);
}
static void snapshot_correct(t_snapshot *x)
{
int wason = x->x_on;
x->x_offset =
(x->x_rqoffset < x->x_nblock ? x->x_rqoffset : x->x_nblock - 1);
x->x_npoints = x->x_deltime * x->x_ksr - x->x_nblock + x->x_offset;
if (x->x_on = (!x->x_stopped && x->x_deltime > 0.))
{
if (!wason) x->x_nleft = x->x_offset; /* CHECKME */
}
else if (wason) clock_unset(x->x_clock);
}
static void snapshot_start(t_snapshot *x)
{
x->x_stopped = 0;
if (!x->x_on && x->x_deltime > 0.) /* CHECKED no default */
{
x->x_nleft = x->x_offset; /* CHECKME */
x->x_on = 1;
}
}
static void snapshot_stop(t_snapshot *x)
{
x->x_stopped = 1;
if (x->x_on)
{
clock_unset(x->x_clock);
x->x_on = 0;
}
}
static void snapshot_float(t_snapshot *x, t_float f)
{
/* CHECKED nonzero/zero, CHECKED incompatible: int only (float ignored) */
if (f != 0.)
snapshot_start(x);
else
snapshot_stop(x);
}
static void snapshot_ft1(t_snapshot *x, t_floatarg f)
{
x->x_deltime = (f > 0. ? f : 0.); /* CHECKED */
/* CHECKED setting deltime to a positive value starts the clock
only if it was stopped by setting deltime to zero */
snapshot_correct(x);
}
static void snapshot_offset(t_snapshot *x, t_floatarg f)
{
int i = (int)f; /* CHECKME */
x->x_rqoffset = (i >= 0 ? i : 0); /* CHECKME */
/* CHECKME if the change has an effect prior to next dsp_add call */
snapshot_correct(x);
}
static t_int *snapshot_perform(t_int *w)
{
t_snapshot *x = (t_snapshot *)(w[1]);
t_float *in = (t_float *)(w[2]);
x->x_value = in[x->x_offset];
if (x->x_on)
{
/* CHECKME nleft vs offset */
if (x->x_nleft < x->x_nblock)
{
clock_delay(x->x_clock, 0);
x->x_nleft = x->x_npoints;
}
else x->x_nleft -= x->x_nblock;
}
return (w + 3);
}
static void snapshot_dsp(t_snapshot *x, t_signal **sp)
{
x->x_nblock = sp[0]->s_n;
x->x_ksr = sp[0]->s_sr * 0.001;
snapshot_correct(x);
x->x_nleft = x->x_offset; /* CHECKME */
dsp_add(snapshot_perform, 2, x, sp[0]->s_vec);
}
static void snapshot_free(t_snapshot *x)
{
if (x->x_clock) clock_free(x->x_clock);
}
static void *snapshot_new(t_floatarg f1, t_floatarg f2)
{
t_snapshot *x = (t_snapshot *)pd_new(snapshot_class);
x->x_stopped = 0; /* CHECKED */
x->x_on = 0;
x->x_value = 0;
x->x_nblock = 64; /* redundant */
x->x_ksr = 44.1; /* redundant */
inlet_new((t_object *)x, (t_pd *)x, &s_float, gensym("ft1"));
outlet_new((t_object *)x, &s_float);
x->x_clock = clock_new(x, (t_method)snapshot_tick);
snapshot_offset(x, f2); /* CHECKME (this is fixed at nblock-1 in Pd) */
snapshot_ft1(x, f1);
return (x);
}
void Snapshot_tilde_setup(void)
{
snapshot_class = class_new(gensym("Snapshot~"),
(t_newmethod)snapshot_new,
(t_method)snapshot_free,
sizeof(t_snapshot), 0,
A_DEFFLOAT, A_DEFFLOAT, 0);
class_addcreator((t_newmethod)snapshot_new, gensym("snapshot~"), A_DEFFLOAT, A_DEFFLOAT, 0);
sic_setup(snapshot_class, snapshot_dsp, snapshot_float);
class_addbang(snapshot_class, snapshot_bang);
class_addmethod(snapshot_class, (t_method)snapshot_ft1,
gensym("ft1"), A_FLOAT, 0);
class_addmethod(snapshot_class, (t_method)snapshot_offset,
gensym("offset"), A_FLOAT, 0);
class_addmethod(snapshot_class, (t_method)snapshot_start,
gensym("start"), 0);
class_addmethod(snapshot_class, (t_method)snapshot_stop,
gensym("stop"), 0);
}
void snapshot_tilde_setup(void)
{
Snapshot_tilde_setup();
}
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