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-rwxr-xr-xfilters/bandpass.c172
1 files changed, 86 insertions, 86 deletions
diff --git a/filters/bandpass.c b/filters/bandpass.c
index c4c2e13..90431ee 100755
--- a/filters/bandpass.c
+++ b/filters/bandpass.c
@@ -1,86 +1,86 @@
-
-/* (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"
-
-/* ------------------- bandpass ----------------------------*/
-
-static t_class *bandpass_class;
-
-void bandpass_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 = 0.;
- t_float b0 = alpha;
- t_float b2 = -alpha;
- 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("bandpass: 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 bandpass_float(t_rbjfilter *x,t_floatarg f)
-{
- x->x_freq = f;
- bandpass_bang(x);
-}
-
-
-static void *bandpass_new(t_floatarg f,t_floatarg bw)
-{
- t_rbjfilter *x = (t_rbjfilter *)pd_new(bandpass_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 bandpass_setup(void)
-{
- bandpass_class = class_new(gensym("bandpass"), (t_newmethod)bandpass_new, 0,
- sizeof(t_rbjfilter), 0,A_DEFFLOAT,A_DEFFLOAT,0);
- class_addbang(bandpass_class,bandpass_bang);
- class_addfloat(bandpass_class,bandpass_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"
+
+/* ------------------- bandpass ----------------------------*/
+
+static t_class *bandpass_class;
+
+void bandpass_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 = 0.;
+ t_float b0 = alpha;
+ t_float b2 = -alpha;
+ 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("bandpass: 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 bandpass_float(t_rbjfilter *x,t_floatarg f)
+{
+ x->x_freq = f;
+ bandpass_bang(x);
+}
+
+
+static void *bandpass_new(t_floatarg f,t_floatarg bw)
+{
+ t_rbjfilter *x = (t_rbjfilter *)pd_new(bandpass_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 bandpass_setup(void)
+{
+ bandpass_class = class_new(gensym("bandpass"), (t_newmethod)bandpass_new, 0,
+ sizeof(t_rbjfilter), 0,A_DEFFLOAT,A_DEFFLOAT,0);
+ class_addbang(bandpass_class,bandpass_bang);
+ class_addfloat(bandpass_class,bandpass_float);
+}
+
+
+