From 4c1375daa8fcfb5c7c1d291df30027c78937f4df Mon Sep 17 00:00:00 2001
From: musil <tmusil@users.sourceforge.net>
Date: Thu, 11 Dec 2008 19:52:38 +0000
Subject: speedlim for anything

svn path=/trunk/externals/iemlib/; revision=10448
---
 iemlib2/src/aspeedlim.c | 140 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 140 insertions(+)
 create mode 100644 iemlib2/src/aspeedlim.c

(limited to 'iemlib2/src/aspeedlim.c')

diff --git a/iemlib2/src/aspeedlim.c b/iemlib2/src/aspeedlim.c
new file mode 100644
index 0000000..9262b8e
--- /dev/null
+++ b/iemlib2/src/aspeedlim.c
@@ -0,0 +1,140 @@
+/* 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);
+}
-- 
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