From 2b60d55c919e7588f5aff15936e83c300b3660bb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?IOhannes=20m=20zm=C3=B6lnig?=
 <zmoelnig@users.sourceforge.net>
Date: Tue, 22 Mar 2005 20:58:25 +0000
Subject: zexy-2.0: - use of abstractions for objects that allow it - some
 objects are build both as externals and abstractions (as slower fallbacks) -
 code-layout is now 1:1 c-file<->object (this should allow for building of
 zexy as  a collection of externals instead as a big library) - matrix-objects
 have moved to iemmatrix !!

svn path=/trunk/externals/zexy/; revision=2641
---
 src/blockmirror_tilde.c | 104 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 104 insertions(+)
 create mode 100644 src/blockmirror_tilde.c

(limited to 'src/blockmirror_tilde.c')

diff --git a/src/blockmirror_tilde.c b/src/blockmirror_tilde.c
new file mode 100644
index 0000000..5c0efcc
--- /dev/null
+++ b/src/blockmirror_tilde.c
@@ -0,0 +1,104 @@
+/******************************************************
+ *
+ * zexy - implementation file
+ *
+ * copyleft (c) IOhannes m zmölnig
+ *
+ *   1999:forum::für::umläute:2004
+ *
+ *   institute of electronic music and acoustics (iem)
+ *
+ ******************************************************
+ *
+ * license: GNU General Public License v.2
+ *
+ ******************************************************/
+
+/*
+  1110:forum::für::umläute:1999
+*/
+
+#include "zexy.h"
+
+/* ------------------------ blockmirror~ ----------------------------- */
+
+/* mirrors a signalblock around it's center:
+   {x[0], x[1], ... x[n-1]} --> {x[n-1], x[n-2], ... x[0]}
+*/
+
+static t_class *blockmirror_class;
+
+typedef struct _blockmirror
+{
+  t_object x_obj;
+  int doit;
+  int blocksize;
+  t_float *blockbuffer;
+} t_blockmirror;
+
+static void blockmirror_float(t_blockmirror *x, t_floatarg f)
+{
+  x->doit = (f != 0);
+}
+
+static t_int *blockmirror_perform(t_int *w)
+{
+  t_blockmirror	*x = (t_blockmirror *)(w[1]);
+  t_float *in = (t_float *)(w[2]);
+  t_float *out = (t_float *)(w[3]);
+  int n = (int)(w[4]);
+  if (x->doit) {
+    if (in==out){
+      int N=n;
+      t_float *dummy=x->blockbuffer;
+      while(n--)*dummy++=*in++;
+      dummy--;
+      while(N--)*out++=*dummy--;
+    } else {
+      in+=n-1;
+      while(n--)*out++=*in--;
+    }
+  } else while (n--) *out++ = *in++;
+  return (w+5);
+}
+
+static void blockmirror_dsp(t_blockmirror *x, t_signal **sp)
+{
+  if (x->blocksize<sp[0]->s_n){
+    if(x->blockbuffer)freebytes(x->blockbuffer, sizeof(t_float)*x->blocksize);
+    x->blocksize = sp[0]->s_n;
+    x->blockbuffer = getbytes(sizeof(t_float)*x->blocksize);
+  }
+  dsp_add(blockmirror_perform, 4, x, sp[0]->s_vec, sp[1]->s_vec, sp[0]->s_n);
+}
+
+static void blockmirror_helper(void)
+{
+  post("\n%c blockmirror~-object for reverting a signal", HEARTSYMBOL);
+  post("'help' : view this\n"
+       "signal~");
+  post("outlet : signal~");
+}
+
+static void *blockmirror_new()
+{
+  t_blockmirror *x = (t_blockmirror *)pd_new(blockmirror_class);
+  outlet_new(&x->x_obj, gensym("signal"));
+  x->doit = 1;
+  x->blocksize=0;
+  return (x);
+}
+
+void blockmirror_tilde_setup(void)
+{
+  blockmirror_class = class_new(gensym("blockmirror~"), (t_newmethod)blockmirror_new, 0,
+			 sizeof(t_blockmirror), 0, A_DEFFLOAT, 0);
+  class_addmethod(blockmirror_class, nullfn, gensym("signal"), 0);
+  class_addmethod(blockmirror_class, (t_method)blockmirror_dsp, gensym("dsp"), 0);
+  
+  class_addfloat(blockmirror_class, blockmirror_float);
+  
+  class_addmethod(blockmirror_class, (t_method)blockmirror_helper, gensym("help"), 0);
+  class_sethelpsymbol(blockmirror_class, gensym("zexy/blockmirror~"));
+  zexy_register("blockmirror~");
+}
-- 
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