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authorHans-Christoph Steiner <eighthave@users.sourceforge.net>2005-11-14 21:59:09 +0000
committerHans-Christoph Steiner <eighthave@users.sourceforge.net>2005-11-14 21:59:09 +0000
commitc1419b43ea354fa04360450ae4f64612df065099 (patch)
tree8c38d7338e9df7e889a18dceeedb3509adbbf423 /filters/notch.c
parent76be9508936fa53fe661d378ee2fc41cc9baebf3 (diff)
these pragmas are only used for MSVC, not MinGW or Cygwin, therefore changing the define from NT to _MSC_VER
svn path=/trunk/externals/ggee/; revision=3903
Diffstat (limited to 'filters/notch.c')
-rwxr-xr-xfilters/notch.c178
1 files changed, 89 insertions, 89 deletions
diff --git a/filters/notch.c b/filters/notch.c
index ab11a7a..c0741e2 100755
--- a/filters/notch.c
+++ b/filters/notch.c
@@ -1,89 +1,89 @@
-/* (C) Guenter Geiger <geiger@epy.co.at> */
-
-
-/*
-
- These filter coefficients computations are taken from
- http://www.harmony-central.com/Computer/Programming/Audio-EQ-Cookbook.txt
-
- written by Robert Bristow-Johnson
-
-*/
-
-#include <m_pd.h>
-#ifdef NT
-#pragma warning( disable : 4244 )
-#pragma warning( disable : 4305 )
-#endif
-#include <math.h>
-#include "filters.h"
-
-
-
-/* ------------------- notch ----------------------------*/
-
-static t_class *notch_class;
-
-void notch_bang(t_rbjfilter *x)
-{
- t_atom at[5];
- t_float omega = e_omega(x->x_freq,x->x_rate);
- t_float alpha = e_alpha(x->x_bw* 0.01,omega);
- t_float b1 = -2.*cos(omega);
- t_float b0 = 1;
- t_float b2 = b0;
- t_float a0 = 1 + alpha;
- t_float a1 = -2.*cos(omega);
- t_float a2 = 1 - alpha;
-
-/* post("bang %f %f %f",x->x_freq, x->x_gain, x->x_bw); */
-
- if (!check_stability(-a1/a0,-a2/a0,b0/a0,b1/a0,b2/a0)) {
- post("notch: filter unstable -> resetting");
- a0=1.;a1=0.;a2=0.;
- b0=1.;b1=0.;b2=0.;
- }
-
- SETFLOAT(at,-a1/a0);
- SETFLOAT(at+1,-a2/a0);
- SETFLOAT(at+2,b0/a0);
- SETFLOAT(at+3,b1/a0);
- SETFLOAT(at+4,b2/a0);
-
- outlet_list(x->x_obj.ob_outlet,&s_list,5,at);
-}
-
-
-void notch_float(t_rbjfilter *x,t_floatarg f)
-{
- x->x_freq = f;
- notch_bang(x);
-}
-
-
-static void *notch_new(t_floatarg f,t_floatarg bw)
-{
- t_rbjfilter *x = (t_rbjfilter *)pd_new(notch_class);
-
- x->x_rate = 44100.0;
- outlet_new(&x->x_obj,&s_float);
-/* floatinlet_new(&x->x_obj, &x->x_gain); */
- floatinlet_new(&x->x_obj, &x->x_bw);
- if (f > 0.) x->x_freq = f;
- if (bw > 0.) x->x_bw = bw;
- return (x);
-}
-
-
-void notch_setup(void)
-{
- notch_class = class_new(gensym("notch"), (t_newmethod)notch_new, 0,
- sizeof(t_rbjfilter), 0,A_DEFFLOAT,A_DEFFLOAT,0);
- class_addbang(notch_class,notch_bang);
- class_addfloat(notch_class,notch_float);
-}
-
-
-
-
-
+/* (C) Guenter Geiger <geiger@epy.co.at> */
+
+
+/*
+
+ These filter coefficients computations are taken from
+ http://www.harmony-central.com/Computer/Programming/Audio-EQ-Cookbook.txt
+
+ written by Robert Bristow-Johnson
+
+*/
+
+#include <m_pd.h>
+#ifdef _MSC_VER
+#pragma warning( disable : 4244 )
+#pragma warning( disable : 4305 )
+#endif
+#include <math.h>
+#include "filters.h"
+
+
+
+/* ------------------- notch ----------------------------*/
+
+static t_class *notch_class;
+
+void notch_bang(t_rbjfilter *x)
+{
+ t_atom at[5];
+ t_float omega = e_omega(x->x_freq,x->x_rate);
+ t_float alpha = e_alpha(x->x_bw* 0.01,omega);
+ t_float b1 = -2.*cos(omega);
+ t_float b0 = 1;
+ t_float b2 = b0;
+ t_float a0 = 1 + alpha;
+ t_float a1 = -2.*cos(omega);
+ t_float a2 = 1 - alpha;
+
+/* post("bang %f %f %f",x->x_freq, x->x_gain, x->x_bw); */
+
+ if (!check_stability(-a1/a0,-a2/a0,b0/a0,b1/a0,b2/a0)) {
+ post("notch: filter unstable -> resetting");
+ a0=1.;a1=0.;a2=0.;
+ b0=1.;b1=0.;b2=0.;
+ }
+
+ SETFLOAT(at,-a1/a0);
+ SETFLOAT(at+1,-a2/a0);
+ SETFLOAT(at+2,b0/a0);
+ SETFLOAT(at+3,b1/a0);
+ SETFLOAT(at+4,b2/a0);
+
+ outlet_list(x->x_obj.ob_outlet,&s_list,5,at);
+}
+
+
+void notch_float(t_rbjfilter *x,t_floatarg f)
+{
+ x->x_freq = f;
+ notch_bang(x);
+}
+
+
+static void *notch_new(t_floatarg f,t_floatarg bw)
+{
+ t_rbjfilter *x = (t_rbjfilter *)pd_new(notch_class);
+
+ x->x_rate = 44100.0;
+ outlet_new(&x->x_obj,&s_float);
+/* floatinlet_new(&x->x_obj, &x->x_gain); */
+ floatinlet_new(&x->x_obj, &x->x_bw);
+ if (f > 0.) x->x_freq = f;
+ if (bw > 0.) x->x_bw = bw;
+ return (x);
+}
+
+
+void notch_setup(void)
+{
+ notch_class = class_new(gensym("notch"), (t_newmethod)notch_new, 0,
+ sizeof(t_rbjfilter), 0,A_DEFFLOAT,A_DEFFLOAT,0);
+ class_addbang(notch_class,notch_bang);
+ class_addfloat(notch_class,notch_float);
+}
+
+
+
+
+