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-rw-r--r--src/noisi~.c82
1 files changed, 45 insertions, 37 deletions
diff --git a/src/noisi~.c b/src/noisi~.c
index b62d5d3..8577ac9 100644
--- a/src/noisi~.c
+++ b/src/noisi~.c
@@ -1,4 +1,4 @@
-/*
+/*
* noisi~: bandlimited noise generator
*
* (c) 1999-2011 IOhannes m zmölnig, forum::für::umläute, institute of electronic music and acoustics (iem)
@@ -7,12 +7,12 @@
* 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, see <http://www.gnu.org/licenses/>.
*/
@@ -20,11 +20,11 @@
/*
30041999
- two bandlimited noise gnerators based on DODGE/JERSE "computer music" c3.9 : RANDI & RANDH
-
+ two bandlimited noise gnerators based on DODGE/JERSE "computer music" c3.9 : RANDI & RANDH
+
I do not care for copyrights
- (all in all, the used noise~-code (in fact, the pseude-random-code) is from Miller Puckette
- and I made only very few modifications so look out for the LICENSE.TXT delivered with
+ (all in all, the used noise~-code (in fact, the pseude-random-code) is from Miller Puckette
+ and I made only very few modifications so look out for the LICENSE.TXT delivered with
puredata for further (c)-information
forum für umläute 1999
@@ -40,13 +40,12 @@
/* general */
-typedef struct _nois
-{
+typedef struct _nois {
t_object x_obj;
int val;
t_sample current;
t_sample decrement;
- t_sample updater;
+ t_sample updater;
t_sample to_go;
} t_nois;
@@ -54,10 +53,9 @@ typedef struct _nois
static void set_noisfreq(t_nois *x, t_floatarg freq)
{
x->updater = (freq > 0) ? sys_getsr() / freq : 1;
- if (x->updater < 1)
- {
- x->updater = 1;
- }
+ if (x->updater < 1) {
+ x->updater = 1;
+ }
x->to_go = 0;
}
@@ -69,20 +67,24 @@ static void set_noisseed(t_nois *x, t_floatarg seed)
-/* ------------------------ noisi~ ----------------------------- */
+/* ------------------------ noisi~ ----------------------------- */
static t_class *noisi_class;
-static inline t_sample int2sample(int i) {
- return ((t_sample)(i & 0x7fffffff) - 0x40000000) * (t_sample)(1.0 / 0x40000000);
+static inline t_sample int2sample(int i)
+{
+ return ((t_sample)(i & 0x7fffffff) - 0x40000000) * (t_sample)(
+ 1.0 / 0x40000000);
}
-static inline int update_intNoise(int i) {
+static inline int update_intNoise(int i)
+{
i *= 435898247;
i += 382842987;
return i;
}
-static t_int *noisi_perform(t_int *w){
+static t_int *noisi_perform(t_int *w)
+{
t_nois *x = (t_nois *)(w[1]);
t_sample *out = (t_sample *)(w[2]);
int n = (int)(w[3]);
@@ -94,18 +96,18 @@ static t_int *noisi_perform(t_int *w){
t_sample still_to_go = x->to_go;
if (all_to_go == 1) {
- /* this is "pure white" noise, so we have to calculate each sample */
+ /* this is "pure white" noise, so we have to calculate each sample */
while (n--) {
*out++ = int2sample(i_value=update_intNoise(i_value));
}
} else if (n < still_to_go) {
- /* signal won't change for the next 64 samples */
+ /* signal won't change for the next 64 samples */
still_to_go -= n;
- while (n--){
+ while (n--) {
*out++ = (f_value -= decrement);
}
} else if (all_to_go + still_to_go > n) {
- /* only one update calculation necessary for 64 samples !!! */
+ /* only one update calculation necessary for 64 samples !!! */
while (still_to_go-- > 0) {
n--;
*out++ = (f_value -= decrement);
@@ -120,13 +122,13 @@ static t_int *noisi_perform(t_int *w){
*out++ = (f_value -= decrement);
}
} else {
- /* anything else */
+ /* anything else */
while (n--) {
- if (still_to_go-- <= 0) { /* update only if all time has elapsed */
- still_to_go += all_to_go;
- f_value=int2sample(i_value);
- i_value=update_intNoise(i_value);
- decrement = (f_value - int2sample(i_value)) / all_to_go;
+ if (still_to_go-- <= 0) { /* update only if all time has elapsed */
+ still_to_go += all_to_go;
+ f_value=int2sample(i_value);
+ i_value=update_intNoise(i_value);
+ decrement = (f_value - int2sample(i_value)) / all_to_go;
}
*out++ = (f_value -= decrement);
}
@@ -136,16 +138,18 @@ static t_int *noisi_perform(t_int *w){
x->current = f_value;
x->decrement = decrement;
x->to_go = still_to_go;
-
+
return (w+4);
}
-static void noisi_dsp(t_nois *x, t_signal **sp){
+static void noisi_dsp(t_nois *x, t_signal **sp)
+{
dsp_add(noisi_perform, 3, x, sp[0]->s_vec, sp[0]->s_n);
}
-static void noisi_helper(void){
+static void noisi_helper(void)
+{
post("\n"HEARTSYMBOL" noisi~\t:: a bandlimited interpolating pseudo-noise generator");
post("<freq>\t : sampling-frequency (in Hz)\n"
"'help'\t : view this");
@@ -157,9 +161,10 @@ static void noisi_helper(void){
post("for further details see DODGE/JERSE \"computer music\" c3.9\n");
}
-static void *noisi_new(t_floatarg f){
+static void *noisi_new(t_floatarg f)
+{
t_nois *x = (t_nois *)pd_new(noisi_class);
-
+
static int init = 4259;
x->val = (init *= 17);
@@ -169,13 +174,16 @@ static void *noisi_new(t_floatarg f){
return (x);
}
-void noisi_tilde_setup(void){
- noisi_class = class_new(gensym("noisi~"), (t_newmethod)noisi_new, 0, sizeof(t_nois), 0, A_DEFFLOAT, 0);
+void noisi_tilde_setup(void)
+{
+ noisi_class = class_new(gensym("noisi~"), (t_newmethod)noisi_new, 0,
+ sizeof(t_nois), 0, A_DEFFLOAT, 0);
class_addfloat(noisi_class, set_noisfreq);
class_addmethod(noisi_class, (t_method)noisi_dsp, gensym("dsp"), 0);
- class_addmethod(noisi_class, (t_method)set_noisseed, gensym("seed"), A_FLOAT, 0);
+ class_addmethod(noisi_class, (t_method)set_noisseed, gensym("seed"),
+ A_FLOAT, 0);
class_addmethod(noisi_class, (t_method)noisi_helper, gensym("help"), 0);
zexy_register("noisi~");
generated by cgit v1.2.1 (git 2.18.0) at 2024-11-05 19:57:50 +0000