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Diffstat (limited to 'src/speedlim.c')
| -rw-r--r-- | src/speedlim.c | 227 |
1 files changed, 227 insertions, 0 deletions
diff --git a/src/speedlim.c b/src/speedlim.c new file mode 100644 index 0000000..1cd5862 --- /dev/null +++ b/src/speedlim.c @@ -0,0 +1,227 @@ +/* ------------------------- 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. */
+
+/* LATER 'clock' method */
+
+#include <string.h>
+#include "m_pd.h"
+// #include "hammer.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);
+}
+
+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);
+ 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
+ class_sethelpsymbol(speedlim_class, gensym("help-speedlim.pd"));
+#else
+ class_sethelpsymbol(speedlim_class, gensym("maxlib/help-speedlim.pd"));
+#endif
+}
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