diff options
Diffstat (limited to 'src/iemlib2/sigm2f.c')
-rw-r--r-- | src/iemlib2/sigm2f.c | 250 |
1 files changed, 125 insertions, 125 deletions
diff --git a/src/iemlib2/sigm2f.c b/src/iemlib2/sigm2f.c index 8ff2e9b..eb410c6 100644 --- a/src/iemlib2/sigm2f.c +++ b/src/iemlib2/sigm2f.c @@ -1,125 +1,125 @@ -/* 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~"));
-}
+/* 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~")); +} |