1 files changed, 85 insertions, 0 deletions
diff --git a/hanning~.c b/hanning~.c
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index 0000000..bf11a64
--- /dev/null
+++ b/hanning~.c
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+/* hanning~ - hanning windowing function for Pure Data 
+**
+** Copyright (C) 2002 Joseph A. Sarlo
+**
+** 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+**
+** jsarlo@mambo.peabody.jhu.edu
+*/
+
+#include "m_pd.h"
+#include "windowFunctions.h"
+#include <stdlib.h>
+#ifdef NT
+#pragma warning( disable : 4244 )
+#pragma warning( disable : 4305 )
+#endif
+#define DEFBLOCKSIZE 64
+
+static t_class *hanning_class;
+
+typedef struct _hanning {
+  t_object x_obj;
+  int x_blocksize;
+  float *x_table;
+} t_hanning;
+
+static t_int* hanning_perform(t_int *w) {
+  t_hanning *x = (t_hanning *)(w[1]);
+  t_float *in = (t_float *)(w[2]);
+  t_float *out = (t_float *)(w[3]);
+  int n = (int)(w[4]);
+  int i;
+  if (x->x_blocksize != n) {
+    if (x->x_blocksize < n) {
+      x->x_table = realloc(x->x_table, n * sizeof(float));
+    }
+    x->x_blocksize = n;
+    fillHanning(x->x_table, x->x_blocksize);
+  }
+  for (i = 0; i < n; i++) {
+    *out++ = *(in++) * x->x_table[i];
+  }
+  return (w + 5);
+}
+
+static void hanning_dsp(t_hanning *x, t_signal **sp) {
+  dsp_add(hanning_perform, 4, x, sp[0]->s_vec, sp[1]->s_vec, sp[0]->s_n);
+}
+
+static void* hanning_new(void) {
+  t_hanning *x = (t_hanning *)pd_new(hanning_class);
+  x->x_blocksize = DEFBLOCKSIZE;
+  x->x_table = malloc(x->x_blocksize * sizeof(float));
+  fillHanning(x->x_table, x->x_blocksize);
+  outlet_new(&x->x_obj, gensym("signal"));
+  return (x);
+}
+
+static void hanning_free(t_hanning *x) {
+  free(x->x_table);
+}
+
+void hanning_tilde_setup(void) {
+  hanning_class = class_new(gensym("hanning~"),
+			    (t_newmethod)hanning_new, 
+			    (t_method)hanning_free,
+    	                    sizeof(t_hanning),
+			    0,
+			    A_DEFFLOAT,
+			    0);
+  class_addmethod(hanning_class, nullfn, gensym("signal"), 0);
+  class_addmethod(hanning_class, (t_method)hanning_dsp, gensym("dsp"), 0);
+}