From d962ed33f6b5fe3040cfbd798f63ab9aa36d1f9e Mon Sep 17 00:00:00 2001
From: Hans-Christoph Steiner <eighthave@users.sourceforge.net>
Date: Thu, 25 May 2006 16:40:19 +0000
Subject: renamed files to match their class names

svn path=/trunk/externals/creb/; revision=5127
---
 modules/junction~.c | 207 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 207 insertions(+)
 create mode 100644 modules/junction~.c

(limited to 'modules/junction~.c')

diff --git a/modules/junction~.c b/modules/junction~.c
new file mode 100644
index 0000000..71476da
--- /dev/null
+++ b/modules/junction~.c
@@ -0,0 +1,207 @@
+/*
+ *   junction.c  - computes a lossless circulant junction 
+ *   Copyright (c) 2000-2003 by Tom Schouten
+ *
+ *   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 "m_pd.h"
+#include <math.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <math.h>
+
+
+typedef struct junctionctl
+{
+  t_int c_channels;
+  t_float **c_in;
+  t_float **c_out;
+  t_float *c_buffer;
+  t_float *c_coef;
+  t_float c_norm;
+} t_junctionctl;
+
+typedef struct junction
+{
+  t_object x_obj;
+  t_float x_f;
+  t_junctionctl x_ctl;
+} t_junction;
+
+void junction_bang(t_junction *x)
+{
+  int i, n       = x->x_ctl.c_channels;
+  t_float *coef  = x->x_ctl.c_coef;
+  t_float r;
+
+  for (i=1; i<n/2; i++)
+    {
+      r = rand();
+      r *= ((2 * M_PI)/RAND_MAX);
+      coef[i]= cos(r);
+      coef[n-i] = sin(r);
+    }
+
+  coef[0] = (rand() & 1) ? 1 : -1;
+  coef[n/2] = (rand() & 1) ? 1 : -1;
+
+  /*  mayer_realfft(n, coef); */
+  
+
+}
+
+void junction_random(t_junction *x, t_floatarg f)
+{
+  srand((int)f);
+  junction_bang(x);
+}
+
+static t_int *junction_perform(t_int *w)
+{
+
+
+
+  t_junctionctl *ctl  = (t_junctionctl *)(w[1]);
+  t_int n             = (t_int)(w[2]);
+  t_int i,j;
+  t_float x,y;
+
+  t_int c             = ctl->c_channels;
+  t_float **in        = ctl->c_in;
+  t_float **out       = ctl->c_out;
+  t_float *buf        = ctl->c_buffer;
+  t_float *coef       = ctl->c_coef;
+
+  t_float norm        = ctl->c_norm;
+
+ 
+  for (i=0;i<n;i++)
+    {
+
+      /* read input */
+      for (j=0; j<c; j++)
+	{
+	  buf[j] = in[j][i];
+	}
+      
+      /* transform */
+      mayer_realfft(c, buf);
+      for (j=1; j<c/2; j++)
+	{
+	  float x,y,a,b;
+	  x = buf[j];
+	  y = buf[c-j];
+	  a = coef[j];
+	  b = coef[c-j];
+	  buf[j]   = a * x - b * y;
+	  buf[c-j] = a * y + b * x;
+	}
+      buf[0] *= coef[0];
+      buf[c/2] *= coef[c/2];
+
+
+      mayer_realifft(c, buf);
+      
+
+      /* write output */
+      for (j=0; j<c; j++) 
+	{ 
+	  out[j][i] = buf[j] * norm;
+	}  
+    }
+
+   
+  return (w+3);
+}
+
+
+
+static void junction_dsp(t_junction *x, t_signal **sp)
+{
+  int i, c = x->x_ctl.c_channels;
+  float norm;
+
+  for (i=0;i<c;i++)
+    {
+      x->x_ctl.c_in[i] = sp[i]->s_vec;
+      x->x_ctl.c_out[i] = sp[i+c]->s_vec;
+    }
+
+  norm = c;
+  norm = 1. / (norm);
+  x->x_ctl.c_norm =  norm; 
+
+
+  dsp_add(junction_perform, 2, &x->x_ctl, sp[0]->s_n);
+
+    /*    dsp_add(junction_perform, 4, &x->x_ctl, sp[0]->s_n, sp[0]->s_vec, sp[1]->s_vec);*/
+
+}                                  
+
+
+void junction_free(t_junction *x)
+{
+
+  if (x->x_ctl.c_in) free (x->x_ctl.c_in);
+  if (x->x_ctl.c_out) free (x->x_ctl.c_out);
+  if (x->x_ctl.c_buffer) free (x->x_ctl.c_buffer);
+  if (x->x_ctl.c_coef) free (x->x_ctl.c_coef);
+
+}
+
+t_class *junction_class;
+
+void *junction_new(t_floatarg channels)
+{
+
+  int l = ilog2(channels);
+  int i,n;
+
+  t_junction *x = (t_junction *)pd_new(junction_class);
+
+
+  if (l<2) l = 2;
+  if (l>4) l = 4;
+
+  n=1;
+  while (l--) n *= 2;
+
+  for (i=1;i<n;i++) inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("signal"), gensym("signal")); 
+  for (i=0;i<n;i++) outlet_new(&x->x_obj, gensym("signal")); 
+
+  x->x_ctl.c_in = (float **)malloc(n*sizeof(float *));
+  x->x_ctl.c_out = (float **)malloc(n*sizeof(float *));
+  x->x_ctl.c_buffer = (float *)malloc(n*sizeof(float));
+  x->x_ctl.c_coef = (float *)malloc(n*sizeof(float));
+  x->x_ctl.c_channels = n;
+
+  junction_bang(x);
+
+  return (void *)x;
+}
+
+void junction_tilde_setup(void)
+{
+  //post("junction~ v0.1");
+    junction_class = class_new(gensym("junction~"), (t_newmethod)junction_new,
+    	(t_method)junction_free, sizeof(t_junction), 0, A_DEFFLOAT, 0);
+    CLASS_MAINSIGNALIN(junction_class, t_junction, x_f); 
+    class_addmethod(junction_class, (t_method)junction_bang, gensym("bang"), 0);
+    class_addmethod(junction_class, (t_method)junction_random, gensym("random"), A_FLOAT, 0);
+    class_addmethod(junction_class, (t_method)junction_dsp, gensym("dsp"), 0); 
+
+}
+
-- 
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