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-rw-r--r--src/iemlib2/sigm2f.c252
1 files changed, 125 insertions, 127 deletions
diff --git a/src/iemlib2/sigm2f.c b/src/iemlib2/sigm2f.c
index f623905..8ff2e9b 100644
--- a/src/iemlib2/sigm2f.c
+++ b/src/iemlib2/sigm2f.c
@@ -1,127 +1,125 @@
-/* Copyright (c) 1997-2003 Miller Puckette.
-* For information on usage and redistribution, and for a DISCLAIMER OF ALL
-* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
-
-iemlib2 written by Thomas Musil (c) IEM KUG Graz Austria 2000 - 2003 */
-
-#ifdef NT
-#pragma warning( disable : 4244 )
-#pragma warning( disable : 4305 )
-#endif
-
-#include "m_pd.h"
-#include "iemlib.h"
-#include <stdlib.h>
-#include <string.h>
-#include <stdio.h>
-#include <math.h>
-
-/* ------------------------ m2f~ ----------------------------- */
-
-#define M2FTABSIZE 2048
-
-float *iem_m2f_table=(float *)0L;
-
-static t_class *sigm2f_class;
-
-typedef struct _sigm2f
-{
- t_object x_obj;
- float x_msi;
-} t_sigm2f;
-
-static void *sigm2f_new(void)
-{
- t_sigm2f *x = (t_sigm2f *)pd_new(sigm2f_class);
- outlet_new(&x->x_obj, gensym("signal"));
- x->x_msi = 0;
- return (x);
-}
-
-static t_int *sigm2f_perform(t_int *w)
-{
- t_float *in = (t_float *)(w[1]);
- t_float *out = (t_float *)(w[2]);
- t_sigm2f *x = (t_sigm2f *)(w[3]);
- int n = (int)(w[4]);
- float *tab = iem_m2f_table, *addr, f1, f2, frac, iinn;
- double dphase;
- int normhipart;
- union tabfudge tf;
-
- tf.tf_d = UNITBIT32;
- normhipart = tf.tf_i[HIOFFSET];
-
-#if 0 /* this is the readable version of the code. */
- while (n--)
- {
- iinn = (*in++)*10.0+670.0;
- dphase = (double)iinn + UNITBIT32;
- tf.tf_d = dphase;
- addr = tab + (tf.tf_i[HIOFFSET] & (M2FTABSIZE-1));
- tf.tf_i[HIOFFSET] = normhipart;
- frac = tf.tf_d - UNITBIT32;
- f1 = addr[0];
- f2 = addr[1];
- *out++ = f1 + frac * (f2 - f1);
- }
-#endif
-#if 1 /* this is the same, unwrapped by hand. */
- iinn = (*in++)*10.0+670.0;
- dphase = (double)iinn + UNITBIT32;
- tf.tf_d = dphase;
- addr = tab + (tf.tf_i[HIOFFSET] & (M2FTABSIZE-1));
- tf.tf_i[HIOFFSET] = normhipart;
- while (--n)
- {
- iinn = (*in++)*10.0+670.0;
- dphase = (double)iinn + UNITBIT32;
- frac = tf.tf_d - UNITBIT32;
- tf.tf_d = dphase;
- f1 = addr[0];
- f2 = addr[1];
- addr = tab + (tf.tf_i[HIOFFSET] & (M2FTABSIZE-1));
- *out++ = f1 + frac * (f2 - f1);
- tf.tf_i[HIOFFSET] = normhipart;
- }
- frac = tf.tf_d - UNITBIT32;
- f1 = addr[0];
- f2 = addr[1];
- *out++ = f1 + frac * (f2 - f1);
-#endif
- return (w+5);
-}
-
-static void sigm2f_dsp(t_sigm2f *x, t_signal **sp)
-{
- dsp_add(sigm2f_perform, 4, sp[0]->s_vec, sp[1]->s_vec, x, sp[0]->s_n);
-}
-
-static void sigm2f_maketable(void)
-{
- union tabfudge tf;
-
- if(!iem_m2f_table)
- {
- int i;
- float *fp, midi, refexp=440.0*exp(-5.75*log(2.0));
-
- iem_m2f_table = (float *)getbytes(sizeof(float) * (M2FTABSIZE+1));
- for(i=0, fp=iem_m2f_table, midi=-67.0; i<=M2FTABSIZE; i++, fp++, midi+=0.1)
- *fp = refexp * exp(0.057762265047 * midi);
- }
- tf.tf_d = UNITBIT32 + 0.5;
- if((unsigned)tf.tf_i[LOWOFFSET] != 0x80000000)
- bug("m2f~: unexpected machine alignment");
-}
-
-void sigm2f_setup(void)
-{
- sigm2f_class = class_new(gensym("m2f~"), (t_newmethod)sigm2f_new, 0,
- sizeof(t_sigm2f), 0, 0);
- CLASS_MAINSIGNALIN(sigm2f_class, t_sigm2f, x_msi);
- class_addmethod(sigm2f_class, (t_method)sigm2f_dsp, gensym("dsp"), 0);
- sigm2f_maketable();
- class_sethelpsymbol(sigm2f_class, gensym("iemhelp/help-m2f~"));
-}
-
+/* For information on usage and redistribution, and for a DISCLAIMER OF ALL
+* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
+
+iemlib2 written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2005 */
+
+#ifdef NT
+#pragma warning( disable : 4244 )
+#pragma warning( disable : 4305 )
+#endif
+
+#include "m_pd.h"
+#include "iemlib.h"
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+/* ----------- m2f~ ----------- */
+/* --------- obsolete --------- */
+
+#define M2FTABSIZE 2048
+
+float *iem_m2f_table=(float *)0L;
+
+static t_class *sigm2f_class;
+
+typedef struct _sigm2f
+{
+ t_object x_obj;
+ float x_msi;
+} t_sigm2f;
+
+static void *sigm2f_new(void)
+{
+ t_sigm2f *x = (t_sigm2f *)pd_new(sigm2f_class);
+ outlet_new(&x->x_obj, gensym("signal"));
+ x->x_msi = 0;
+ return (x);
+}
+
+static t_int *sigm2f_perform(t_int *w)
+{
+ t_float *in = (t_float *)(w[1]);
+ t_float *out = (t_float *)(w[2]);
+ t_sigm2f *x = (t_sigm2f *)(w[3]);
+ int n = (int)(w[4]);
+ float *tab = iem_m2f_table, *addr, f1, f2, frac, iinn;
+ double dphase;
+ int normhipart;
+ union tabfudge tf;
+
+ tf.tf_d = UNITBIT32;
+ normhipart = tf.tf_i[HIOFFSET];
+
+#if 0 /* this is the readable version of the code. */
+ while (n--)
+ {
+ iinn = (*in++)*10.0+670.0;
+ dphase = (double)iinn + UNITBIT32;
+ tf.tf_d = dphase;
+ addr = tab + (tf.tf_i[HIOFFSET] & (M2FTABSIZE-1));
+ tf.tf_i[HIOFFSET] = normhipart;
+ frac = tf.tf_d - UNITBIT32;
+ f1 = addr[0];
+ f2 = addr[1];
+ *out++ = f1 + frac * (f2 - f1);
+ }
+#endif
+#if 1 /* this is the same, unwrapped by hand. */
+ iinn = (*in++)*10.0+670.0;
+ dphase = (double)iinn + UNITBIT32;
+ tf.tf_d = dphase;
+ addr = tab + (tf.tf_i[HIOFFSET] & (M2FTABSIZE-1));
+ tf.tf_i[HIOFFSET] = normhipart;
+ while (--n)
+ {
+ iinn = (*in++)*10.0+670.0;
+ dphase = (double)iinn + UNITBIT32;
+ frac = tf.tf_d - UNITBIT32;
+ tf.tf_d = dphase;
+ f1 = addr[0];
+ f2 = addr[1];
+ addr = tab + (tf.tf_i[HIOFFSET] & (M2FTABSIZE-1));
+ *out++ = f1 + frac * (f2 - f1);
+ tf.tf_i[HIOFFSET] = normhipart;
+ }
+ frac = tf.tf_d - UNITBIT32;
+ f1 = addr[0];
+ f2 = addr[1];
+ *out++ = f1 + frac * (f2 - f1);
+#endif
+ return (w+5);
+}
+
+static void sigm2f_dsp(t_sigm2f *x, t_signal **sp)
+{
+ dsp_add(sigm2f_perform, 4, sp[0]->s_vec, sp[1]->s_vec, x, sp[0]->s_n);
+}
+
+static void sigm2f_maketable(void)
+{
+ union tabfudge tf;
+
+ if(!iem_m2f_table)
+ {
+ int i;
+ float *fp, midi, refexp=440.0*exp(-5.75*log(2.0));
+
+ iem_m2f_table = (float *)getbytes(sizeof(float) * (M2FTABSIZE+1));
+ for(i=0, fp=iem_m2f_table, midi=-67.0; i<=M2FTABSIZE; i++, fp++, midi+=0.1)
+ *fp = refexp * exp(0.057762265047 * midi);
+ }
+ tf.tf_d = UNITBIT32 + 0.5;
+ if((unsigned)tf.tf_i[LOWOFFSET] != 0x80000000)
+ bug("m2f~: unexpected machine alignment");
+}
+
+void sigm2f_setup(void)
+{
+ sigm2f_class = class_new(gensym("m2f~"), (t_newmethod)sigm2f_new, 0,
+ sizeof(t_sigm2f), 0, 0);
+ CLASS_MAINSIGNALIN(sigm2f_class, t_sigm2f, x_msi);
+ class_addmethod(sigm2f_class, (t_method)sigm2f_dsp, gensym("dsp"), 0);
+ sigm2f_maketable();
+ class_sethelpsymbol(sigm2f_class, gensym("iemhelp/help-m2f~"));
+}