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/* ------------------------- speedlim ----------------------------------------- */
/* */
/* Lets information through only every N milliseconds. */
/* Written by Krzysztof Czaja for his cyclone library. */
/* Modified to fit into maxlib by Olaf Matthes <olaf.matthes@gmx.de>. */
/* Get source at http://www.akustische-kunst.org/puredata/maxlib/ */
/* */
/* This program is free software; you can redistribute it and/or */
/* modify it under the terms of the GNU General Public License */
/* as published by the Free Software Foundation; either version 2 */
/* of the License, or (at your option) any later version. */
/* */
/* This program is distributed in the hope that it will be useful, */
/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
/* GNU General Public License for more details. */
/* */
/* You should have received a copy of the GNU General Public License */
/* along with this program; if not, write to the Free Software */
/* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* */
/* You should have received a copy of the GNU Lesser General Public */
/* License along with this library; if not, write to the */
/* Free Software Foundation, Inc., 59 Temple Place - Suite 330, */
/* Boston, MA 02111-1307, USA. */
/* */
/* Based on PureData by Miller Puckette and others. */
/* */
/* ---------------------------------------------------------------------------- */
/* this is the original copyright notice: */
/* Copyright (c) 1997-2002 Miller Puckette and others.
* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution. */
#include <string.h>
#include "m_pd.h"
#define SPEEDLIM_INISIZE 32 /* LATER rethink */
#define SPEEDLIM_MAXSIZE 256 /* not used */
typedef struct _speedlim
{
t_object x_ob;
int x_open;
t_float x_delta;
t_symbol *x_selector;
t_float x_float;
t_symbol *x_symbol;
t_gpointer *x_pointer;
int x_size; /* as allocated */
int x_natoms; /* as used */
t_atom *x_message;
t_atom x_messini[SPEEDLIM_INISIZE];
int x_entered;
t_clock *x_clock;
} t_speedlim;
static t_class *speedlim_class;
/* a caller must check for nrequested > *sizep */
/* returns actual number of atoms: requested (success)
or a default value of initial size (failure) */
/* the result is guaranteed to be >= min(nrequested, inisize) */
static int speedlim_grow(int nrequested, int *sizep, t_atom **bufp,
int inisize, t_atom *bufini)
{
int newsize = *sizep * 2;
while (newsize < nrequested) newsize *= 2;
if (*bufp == bufini)
*bufp = (t_atom *)getbytes(newsize * sizeof(**bufp));
else
*bufp = (t_atom *)resizebytes(*bufp, *sizep * sizeof(**bufp),
newsize * sizeof(**bufp));
if (*bufp)
*sizep = newsize;
else
{
*bufp = bufini;
nrequested = *sizep = inisize;
}
return (nrequested);
}
static void speedlim_dooutput(t_speedlim *x, t_symbol *s, int ac, t_atom *av)
{
x->x_open = 0; /* so there will be no reentrant calls of dooutput */
x->x_entered = 1; /* this prevents a message from being overridden */
clock_unset(x->x_clock);
if (s == &s_bang)
outlet_bang(((t_object *)x)->ob_outlet);
else if (s == &s_float)
outlet_float(((t_object *)x)->ob_outlet, x->x_float);
else if (s == &s_symbol && x->x_symbol)
{
/* if x_symbol is null, then symbol &s_ is passed
by outlet_anything() -> typedmess() */
outlet_symbol(((t_object *)x)->ob_outlet, x->x_symbol);
x->x_symbol = 0;
}
else if (s == &s_pointer && x->x_pointer)
{
/* LATER */
x->x_pointer = 0;
}
else if (s == &s_list)
outlet_list(((t_object *)x)->ob_outlet, &s_list, ac, av);
else if (s)
outlet_anything(((t_object *)x)->ob_outlet, s, ac, av);
x->x_selector = 0;
x->x_natoms = 0;
if (x->x_delta > 0)
clock_delay(x->x_clock, x->x_delta);
else
x->x_open = 1;
x->x_entered = 0;
}
static void speedlim_tick(t_speedlim *x)
{
if (x->x_selector)
speedlim_dooutput(x, x->x_selector, x->x_natoms, x->x_message);
else
x->x_open = 1;
}
static void speedlim_anything(t_speedlim *x, t_symbol *s, int ac, t_atom *av)
{
if (x->x_open)
speedlim_dooutput(x, s, ac, av);
else if (s && s != &s_ && !x->x_entered)
{
if (ac > x->x_size)
/* MAXSIZE not used, not even a warning...
LATER consider clipping */
ac = speedlim_grow(ac, &x->x_size, &x->x_message,
SPEEDLIM_INISIZE, x->x_messini);
x->x_selector = s;
x->x_natoms = ac;
if (ac)
memcpy(x->x_message, av, ac * sizeof(*x->x_message));
}
}
static void speedlim_bang(t_speedlim *x)
{
x->x_selector = &s_bang;
speedlim_anything(x, x->x_selector, 0, 0);
}
static void speedlim_float(t_speedlim *x, t_float f)
{
x->x_selector = &s_float;
x->x_float = f;
speedlim_anything(x, x->x_selector, 0, 0);
}
static void speedlim_symbol(t_speedlim *x, t_symbol *s)
{
x->x_selector = &s_symbol;
x->x_symbol = s;
speedlim_anything(x, x->x_selector, 0, 0);
}
/* LATER gpointer */
static void speedlim_list(t_speedlim *x, t_symbol *s, int ac, t_atom *av)
{
x->x_selector = &s_list;
speedlim_anything(x, x->x_selector, ac, av);
}
static void speedlim_ft1(t_speedlim *x, t_floatarg f)
{
if (f < 0)
f = 0; /* redundant (and CHECKED) */
x->x_delta = f;
/* CHECKED: no rearming --
if clock is set, then new delta value is not used until next tick */
}
static void speedlim_free(t_speedlim *x)
{
if (x->x_message != x->x_messini)
freebytes(x->x_message, x->x_size * sizeof(*x->x_message));
if (x->x_clock)
clock_free(x->x_clock);
}
static void *speedlim_new(t_floatarg f)
{
t_speedlim *x = (t_speedlim *)pd_new(speedlim_class);
x->x_open = 1; /* CHECKED */
x->x_delta = 0;
x->x_selector = 0;
x->x_float = 0;
x->x_symbol = 0;
x->x_pointer = 0;
x->x_size = SPEEDLIM_INISIZE;
x->x_natoms = 0;
x->x_message = x->x_messini;
x->x_entered = 0;
inlet_new((t_object *)x, (t_pd *)x, &s_float, gensym("ft1"));
outlet_new((t_object *)x, &s_anything);
x->x_clock = clock_new(x, (t_method)speedlim_tick);
speedlim_ft1(x, f);
return (x);
}
#ifndef MAXLIB
void speedlim_setup(void)
{
speedlim_class = class_new(gensym("speedlim"), (t_newmethod)speedlim_new,
(t_method)speedlim_free, sizeof(t_speedlim), 0, A_DEFFLOAT, 0);
#else
void maxlib_speedlim_setup(void)
{
speedlim_class = class_new(gensym("maxlib_speedlim"), (t_newmethod)speedlim_new,
(t_method)speedlim_free, sizeof(t_speedlim), 0, A_DEFFLOAT, 0);
class_addcreator((t_newmethod)speedlim_new, gensym("speedlim"), A_DEFFLOAT, 0);
#endif
class_addbang(speedlim_class, speedlim_bang);
class_addfloat(speedlim_class, speedlim_float);
class_addsymbol(speedlim_class, speedlim_symbol);
class_addlist(speedlim_class, speedlim_list);
class_addanything(speedlim_class, speedlim_anything);
class_addmethod(speedlim_class, (t_method)speedlim_ft1, gensym("ft1"), A_FLOAT, 0);
#ifndef MAXLIB
#else
class_sethelpsymbol(speedlim_class, gensym("maxlib/speedlim-help.pd"));
#endif
}
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