From a7e6303e3e7e87bf90b21821d2e419ed4799783c Mon Sep 17 00:00:00 2001
From: musil <tmusil@users.sourceforge.net>
Date: Fri, 28 Jun 2013 17:25:22 +0000
Subject: initial check in of double precision library of iem

svn path=/trunk/externals/iem/iem_dp/; revision=17167
---
 src/tabread4~~.c | 128 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 128 insertions(+)
 create mode 100755 src/tabread4~~.c

(limited to 'src/tabread4~~.c')

diff --git a/src/tabread4~~.c b/src/tabread4~~.c
new file mode 100755
index 0000000..83f6603
--- /dev/null
+++ b/src/tabread4~~.c
@@ -0,0 +1,128 @@
+/* For information on usage and redistribution, and for a DISCLAIMER OF ALL
+* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
+
+iem_dp written by IOhannes m zmoelnig, Thomas Musil, Copyright (c) IEM KUG Graz Austria 1999 - 2007 */
+/* double precision library */
+
+
+#include "m_pd.h"
+#include "iemlib.h"
+#include "iem_dp.h"
+
+/* -------------------------- tabread4~~ ------------------------------ */
+/* based on miller's tabread4~ which is part of pd */
+
+static t_class *tabread4_tilde_tilde_class;
+
+typedef struct _tabread4_tilde_tilde
+{
+  t_object  x_obj;
+  int       x_npoints;
+  iemarray_t  *x_vec;
+  t_symbol  *x_arrayname;
+  t_float   x_f;
+} t_tabread4_tilde_tilde;
+
+static void *tabread4_tilde_tilde_new(t_symbol *s)
+{
+  t_tabread4_tilde_tilde *x = (t_tabread4_tilde_tilde *)pd_new(tabread4_tilde_tilde_class);
+  x->x_arrayname = s;
+  x->x_vec = 0;
+  x->x_npoints=0;
+  
+  inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_signal, &s_signal);
+  outlet_new(&x->x_obj, &s_signal);
+  x->x_f = 0;
+  return (x);
+}
+
+static t_int *tabread4_tilde_tilde_perform(t_int *w)
+{
+  t_tabread4_tilde_tilde *x = (t_tabread4_tilde_tilde *)(w[1]);
+  t_sample *in0 = (t_sample *)(w[2]);
+  t_sample *in1 = (t_sample *)(w[3]);
+  t_sample *out = (t_sample *)(w[4]);
+  int n = (int)(w[5]);
+  int maxindex;
+  iemarray_t *buf = x->x_vec, *wp;
+  int i;
+  
+  maxindex = x->x_npoints - 3;
+  if (!buf){
+    while (n--) *out++ = 0;
+    return (w+6);
+  }
+  //  post("xxx");
+  for (i = 0; i < n; i++)
+  {
+    t_sample in0_s=*in0++;
+    t_sample in1_s=*in1++;
+	double findex = iem_dp_calc_sum(in0_s, in1_s);
+    long int index = findex;
+    double frac;
+    t_sample a,  b,  c,  d, cminusb;
+
+    if (index < 1)
+      index = 1, frac = 0;
+    else if (index > maxindex)
+      index = maxindex, frac = 1;
+    else frac = findex - index;
+    
+    //  post("%f + %f = %f", in0_s, in1_s, findex);
+    //  post("%f - %f = %d", findex, frac, index);
+    
+    wp = buf + index;
+    
+    a = iemarray_getfloat(wp,-1);
+    b = iemarray_getfloat(wp, 0);
+    c = iemarray_getfloat(wp, 1);
+    d = iemarray_getfloat(wp, 2);
+    
+    cminusb = c-b;
+    *out++ = b + frac * (cminusb - 0.1666667f * (1.-frac) * 
+                         ((d - a - 3.0f * cminusb) * frac + (d + 2.0f*a - 3.0f*b)));
+  }
+  return (w+6);
+}
+
+static void tabread4_tilde_tilde_set(t_tabread4_tilde_tilde *x, t_symbol *s)
+{
+  t_garray *a;
+  
+  x->x_arrayname = s;
+  if (!(a = (t_garray *)pd_findbyclass(x->x_arrayname, garray_class)))
+  {
+    if (*s->s_name)
+      pd_error(x, "tabread4~~: %s: no such array", x->x_arrayname->s_name);
+    iemarray_setfloat(x->x_vec, 0, 0.0f);
+  }
+  else if (!iemarray_getarray(a, &x->x_npoints, &x->x_vec))
+  {
+    pd_error(x, "%s: bad template for tabread4~~", x->x_arrayname->s_name);
+    iemarray_setfloat(x->x_vec, 0, 0.0f);
+  }
+  else garray_usedindsp(a);
+}
+
+static void tabread4_tilde_tilde_dsp(t_tabread4_tilde_tilde *x, t_signal **sp)
+{
+  tabread4_tilde_tilde_set(x, x->x_arrayname);
+  
+  dsp_add(tabread4_tilde_tilde_perform, 5, x,
+    sp[0]->s_vec, sp[1]->s_vec, sp[2]->s_vec, sp[0]->s_n);
+  
+}
+
+static void tabread4_tilde_tilde_free(t_tabread4_tilde_tilde *x)
+{
+}
+
+void tabread4_tilde_tilde_setup(void)
+{
+  tabread4_tilde_tilde_class = class_new(gensym("tabread4~~"),
+    (t_newmethod)tabread4_tilde_tilde_new, (t_method)tabread4_tilde_tilde_free, 
+    sizeof(t_tabread4_tilde_tilde), 0, A_DEFSYM, 0);
+  CLASS_MAINSIGNALIN(tabread4_tilde_tilde_class, t_tabread4_tilde_tilde, x_f);
+  class_addmethod(tabread4_tilde_tilde_class, (t_method)tabread4_tilde_tilde_dsp, gensym("dsp"), 0);
+  class_addmethod(tabread4_tilde_tilde_class, (t_method)tabread4_tilde_tilde_set, gensym("set"), A_SYMBOL, 0);
+}
-- 
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