1 files changed, 196 insertions, 0 deletions
diff --git a/modules/pdp_del.c b/modules/pdp_del.c
new file mode 100644
index 0000000..97e47fd
--- /dev/null
+++ b/modules/pdp_del.c
@@ -0,0 +1,196 @@
+/*
+ *   Pure Data Packet module.
+ *   Copyright (c) by Tom Schouten <pdp@zzz.kotnet.org>
+ *
+ *   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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+
+
+#include "pdp.h"
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+typedef struct pdp_del_struct
+{
+  t_object x_obj;
+  t_float x_f;
+  
+  t_outlet *x_outlet0;
+
+  int *x_packet;
+  int x_order;
+  int x_head;
+  int x_delay;
+} t_pdp_del;
+
+
+
+
+
+static void pdp_del_input_0(t_pdp_del *x, t_symbol *s, t_floatarg f)
+{
+  int in;
+  int out;
+  int packet;
+
+  
+    /* if this is a register_ro message or register_rw message, register with packet factory */
+    /* if this is a process message, start the processing + propagate stuff to outputs */
+
+    if (s == gensym("register_ro")){
+      in = (x->x_head & (x->x_order-1));
+      //post("pdp_del: marking unused packed id=%d on loc %d", x->x_packet[0], in);
+      pdp_packet_mark_unused(x->x_packet[in]);
+      packet = pdp_packet_copy_ro((int)f);
+      x->x_packet[in] = packet;
+      //post("pdp_del: writing packed id=%d on loc %d", packet, in);
+    }
+    else if (s == gensym("process")){
+      out = ((x->x_head + x->x_delay) & (x->x_order-1));
+      packet = x->x_packet[out];
+
+      if (-1 != packet){
+	//post("pdp_del: packet %d has id %d", out, packet);
+	pdp_packet_mark_unused(packet);
+	outlet_pdp(x->x_outlet0, packet);
+	x->x_packet[out] = -1;
+      }
+      else {
+	//post("pdp_del: packet %d is empty", out);
+      }
+      x->x_head--;
+    }
+
+
+}
+
+
+
+
+
+static void pdp_del_delay(t_pdp_del *x, t_floatarg fdel)
+{
+  int del = (int)fdel;
+  if (del < 0) del = 0;
+  if (del >= x->x_order) del = x->x_order - 1;
+
+  x->x_delay = del;
+
+}
+
+static void pdp_del_reset(t_pdp_del *x)
+{
+  int i;
+  for (i=0; i<x->x_order; i++) {
+      pdp_packet_mark_unused(x->x_packet[i]);
+      x->x_packet[i] = -1;
+  }
+  x->x_head = 0;
+
+}
+
+static void pdp_del_free(t_pdp_del *x)
+{
+  pdp_del_reset(x);
+  free (x->x_packet);
+}
+
+t_class *pdp_del_class;
+
+
+
+void *pdp_del_new(t_floatarg forder, t_floatarg fdel)
+{
+  int order = (int)forder;
+  int del;
+  int logorder;
+  int i;
+  t_pdp_del *x = (t_pdp_del *)pd_new(pdp_del_class);
+
+
+  del = order;
+  order++;
+
+  if (del < 0) del = 0;
+  
+
+  if (order <= 2) order = 2;
+  else {
+
+    order--;
+    logorder = 1;
+
+
+    while ((order | 1) != 1) {
+      order >>= 1;
+      logorder++;
+    }
+
+    order = 1 << logorder;
+  }
+
+  post("pdp_del: order = %d", order);
+
+  x->x_order = order;
+  x->x_packet = (int *)malloc(sizeof(int)*order);
+  for(i=0; i<order; i++) x->x_packet[i] = -1;
+
+  x->x_delay = del;
+
+
+  inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("float"), gensym("delay"));
+
+  x->x_outlet0 = outlet_new(&x->x_obj, &s_anything); 
+
+
+  return (void *)x;
+}
+
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+
+void pdp_del_setup(void)
+{
+
+
+    pdp_del_class = class_new(gensym("pdp_del"), (t_newmethod)pdp_del_new,
+			      (t_method)pdp_del_free, sizeof(t_pdp_del), 0, A_DEFFLOAT, A_NULL);
+    
+    class_addmethod(pdp_del_class, (t_method)pdp_del_input_0, gensym("pdp"),  A_SYMBOL, A_DEFFLOAT, A_NULL);
+    class_addmethod(pdp_del_class, (t_method)pdp_del_delay, gensym("delay"),  A_DEFFLOAT, A_NULL);
+    class_addmethod(pdp_del_class, (t_method)pdp_del_reset, gensym("reset"),  A_NULL);
+
+}
+
+#ifdef __cplusplus
+}
+#endif