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-rw-r--r--iemlib2/src/aspeedlim.c140
1 files changed, 140 insertions, 0 deletions
diff --git a/iemlib2/src/aspeedlim.c b/iemlib2/src/aspeedlim.c
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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.
+
+iemlib2 written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2008 */
+
+
+#include "m_pd.h"
+#include "iemlib.h"
+
+/* ------------------------ aspeedlim --------------------------- */
+/* -- reduces the flow of anything-messages to one message per -- */
+/* -------------------- time interval in ms --------------------- */
+
+struct _aspeedlim_proxy;
+
+static t_class *aspeedlim_class;
+static t_class *aspeedlim_proxy_class;
+
+typedef struct _aspeedlim
+{
+ t_object x_obj;
+ struct _aspeedlim_proxy *x_proxy_inlet;
+ t_clock *x_clock;
+ float x_delay;
+ int x_output_is_locked;
+ int x_there_was_n_event;
+ int x_size;
+ int x_ac;
+ t_atom *x_at;
+ t_symbol *x_selector_sym;
+} t_aspeedlim;
+
+typedef struct _aspeedlim_proxy
+{
+ t_object p_obj;
+ t_aspeedlim *p_owner;
+} t_aspeedlim_proxy;
+
+static void aspeedlim_atcopy(t_atom *src, t_atom *dst, int n)
+{
+ while(n--)
+ *dst++ = *src++;
+}
+
+static void aspeedlim_proxy_stop(t_aspeedlim_proxy *p)
+{
+ t_aspeedlim *x = p->p_owner;
+
+ x->x_output_is_locked = 0;
+ x->x_there_was_n_event = 0;
+ clock_unset(x->x_clock);
+}
+
+static void aspeedlim_proxy_delay(t_aspeedlim_proxy *p, t_floatarg delay)
+{
+ t_aspeedlim *x = p->p_owner;
+
+ if(delay < 0.0)
+ delay = 0.0;
+ x->x_delay = delay;
+}
+
+static void aspeedlim_tick(t_aspeedlim *x)
+{
+ if(x->x_there_was_n_event)
+ {
+ x->x_output_is_locked = 1;
+ x->x_there_was_n_event = 0;
+ outlet_anything(x->x_obj.ob_outlet, x->x_selector_sym, x->x_ac, x->x_at);
+ clock_delay(x->x_clock, x->x_delay);
+ }
+ else
+ {
+ x->x_output_is_locked = 0;
+ x->x_there_was_n_event = 0;
+ }
+}
+
+static void aspeedlim_anything(t_aspeedlim *x, t_symbol *s, int ac, t_atom *av)
+{
+ if(ac > x->x_size)
+ {
+ x->x_at = (t_atom *)resizebytes(x->x_at, x->x_size*sizeof(t_atom), (10 + ac)*sizeof(t_atom));
+ x->x_size = 10 + ac;
+ }
+ x->x_ac = ac;
+ x->x_selector_sym = s;
+ aspeedlim_atcopy(av, x->x_at, ac);
+ if(!x->x_output_is_locked)
+ {
+ x->x_output_is_locked = 1;
+ x->x_there_was_n_event = 0;
+ outlet_anything(x->x_obj.ob_outlet, x->x_selector_sym, x->x_ac, x->x_at);
+ clock_delay(x->x_clock, x->x_delay);
+ }
+ else
+ x->x_there_was_n_event = 1;
+}
+
+static void aspeedlim_free(t_aspeedlim *x)
+{
+ clock_free(x->x_clock);
+ if(x->x_at)
+ freebytes(x->x_at, x->x_size * sizeof(t_atom));
+ if(x->x_proxy_inlet)
+ pd_free((t_pd *)x->x_proxy_inlet);
+}
+
+static void *aspeedlim_new(t_floatarg delay)
+{
+ t_aspeedlim *x = (t_aspeedlim *)pd_new(aspeedlim_class);
+ t_aspeedlim_proxy *p = (t_aspeedlim_proxy *)pd_new(aspeedlim_proxy_class);
+
+ x->x_proxy_inlet = p;
+ p->p_owner = x;
+ x->x_size = 10;
+ x->x_at = (t_atom *)getbytes(x->x_size * sizeof(t_atom));
+ x->x_ac = 0;
+ x->x_selector_sym = &s_bang;
+ if(delay < 0.0)
+ delay = 0.0;
+ x->x_delay = delay;
+ x->x_output_is_locked = 0;
+ x->x_there_was_n_event = 0;
+ x->x_clock = clock_new(x, (t_method)aspeedlim_tick);
+ inlet_new((t_object *)x, (t_pd *)p, 0, 0);
+ outlet_new(&x->x_obj, &s_list);
+ return (x);
+}
+
+void aspeedlim_setup(void)
+{
+ aspeedlim_class = class_new(gensym("aspeedlim"), (t_newmethod)aspeedlim_new,
+ (t_method)aspeedlim_free, sizeof(t_aspeedlim), 0, A_DEFFLOAT, 0);
+ class_addanything(aspeedlim_class, aspeedlim_anything);
+
+ aspeedlim_proxy_class = class_new(gensym("_aspeedlim_proxy"), 0, 0, sizeof(t_aspeedlim_proxy), CLASS_PD | CLASS_NOINLET, 0);
+ class_addmethod(aspeedlim_proxy_class, (t_method)aspeedlim_proxy_stop, gensym("stop"), 0);
+ class_addfloat(aspeedlim_proxy_class, (t_method)aspeedlim_proxy_delay);
+}