diff options
Diffstat (limited to 'src/iemlib2/sigm2f.c')
-rw-r--r-- | src/iemlib2/sigm2f.c | 252 |
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~"));
+}
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