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-rw-r--r--src/iemlib2/speedlim.c107
1 files changed, 107 insertions, 0 deletions
diff --git a/src/iemlib2/speedlim.c b/src/iemlib2/speedlim.c
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+/* Copyright (c) 1997-2003 Miller Puckette.
+* For information on usage and redistribution, and for a DISCLAIMER OF ALL
+* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
+
+iemlib2 written by Thomas Musil (c) IEM KUG Graz Austria 2000 - 2003 */
+
+#ifdef NT
+#pragma warning( disable : 4244 )
+#pragma warning( disable : 4305 )
+#endif
+
+#include "m_pd.h"
+#include "iemlib.h"
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <math.h>
+
+/* ------------------------ speedlim ---------------------------- */
+static t_class *speedlim_class;
+
+typedef struct _speedlim
+{
+ t_object x_obj;
+ t_clock *x_clock;
+ float x_delay;
+ int x_output_is_locked;
+ int x_there_was_n_event;
+ float x_curval;
+ float x_lastout;
+} t_speedlim;
+
+static void speedlim_stop(t_speedlim *x)
+{
+ x->x_output_is_locked = 0;
+ x->x_there_was_n_event = 0;
+ clock_unset(x->x_clock);
+}
+
+static void speedlim_tick(t_speedlim *x)
+{
+ if(x->x_there_was_n_event)
+ {
+ x->x_output_is_locked = 1;
+ x->x_there_was_n_event = 0;
+ outlet_float(x->x_obj.ob_outlet, x->x_curval);
+ clock_delay(x->x_clock, x->x_delay);
+ }
+ else
+ {
+ x->x_output_is_locked = 0;
+ x->x_there_was_n_event = 0;
+ }
+}
+
+static void speedlim_float(t_speedlim *x, t_float val)
+{
+ x->x_curval = val;
+ if(!x->x_output_is_locked)
+ {
+ x->x_output_is_locked = 1;
+ x->x_there_was_n_event = 0;
+ outlet_float(x->x_obj.ob_outlet, x->x_curval);
+ clock_delay(x->x_clock, x->x_delay);
+ }
+ else
+ x->x_there_was_n_event = 1;
+}
+
+static void speedlim_ft1(t_speedlim *x, t_float delay)
+{
+ if(delay < 0.0)
+ delay = 0.0;
+ x->x_delay = delay;
+}
+
+static void speedlim_free(t_speedlim *x)
+{
+ clock_free(x->x_clock);
+}
+
+static void *speedlim_new(t_float delay)
+{
+ t_speedlim *x = (t_speedlim *)pd_new(speedlim_class);
+
+ if(delay < 0.0)
+ delay = 0.0;
+ x->x_delay = delay;
+ x->x_curval = 0.0f;
+ x->x_output_is_locked = 0;
+ x->x_there_was_n_event = 0;
+ x->x_clock = clock_new(x, (t_method)speedlim_tick);
+ outlet_new(&x->x_obj, &s_float);
+ inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft1"));
+ 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_addmethod(speedlim_class, (t_method)speedlim_stop, gensym("stop"), 0);
+ class_addfloat(speedlim_class, (t_method)speedlim_float);
+ class_addmethod(speedlim_class, (t_method)speedlim_ft1, gensym("ft1"), A_FLOAT, 0);
+ class_sethelpsymbol(speedlim_class, gensym("iemhelp/help-speedlim"));
+}
+