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Diffstat (limited to 'filters')
-rwxr-xr-xfilters/bandpass.c172
-rwxr-xr-xfilters/equalizer.c178
-rwxr-xr-xfilters/highpass.c174
-rwxr-xr-xfilters/highshelf.c180
-rwxr-xr-xfilters/hlshelf.c452
-rwxr-xr-xfilters/lowpass.c178
-rwxr-xr-xfilters/lowshelf.c182
-rwxr-xr-xfilters/moog~.c364
-rwxr-xr-xfilters/notch.c178
9 files changed, 1029 insertions, 1029 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);
+}
+
+
+
diff --git a/filters/equalizer.c b/filters/equalizer.c
index ea1ebec..6765df4 100755
--- a/filters/equalizer.c
+++ b/filters/equalizer.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"
-
-
-
-/* ------------------- equ ----------------------------*/
-static t_class *equ_class;
-
-void equ_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 b0 = 1 + alpha*e_A(x->x_gain);
- t_float b1 = -2.*cos(omega);
- t_float b2 = 1 - alpha*e_A(x->x_gain);
- t_float a0 = 1 + alpha/e_A(x->x_gain);
- t_float a1 = -2.*cos(omega);
- t_float a2 = 1 - alpha/e_A(x->x_gain);
-
-/* 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("equ: 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 equ_float(t_rbjfilter *x,t_floatarg f)
-{
- x->x_freq = f;
- equ_bang(x);
-}
-
-
-static void *equ_new(t_floatarg f,t_floatarg g,t_floatarg bw)
-{
- t_rbjfilter *x = (t_rbjfilter *)pd_new(equ_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;
- if (g != 0.) x->x_gain = g;
- return (x);
-}
-
-
-void equalizer_setup(void)
-{
- equ_class = class_new(gensym("equalizer"), (t_newmethod)equ_new, 0,
- sizeof(t_rbjfilter), 0,A_DEFFLOAT,A_DEFFLOAT,A_DEFFLOAT,0);
- class_addbang(equ_class,equ_bang);
- class_addfloat(equ_class,equ_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"
+
+
+
+/* ------------------- equ ----------------------------*/
+static t_class *equ_class;
+
+void equ_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 b0 = 1 + alpha*e_A(x->x_gain);
+ t_float b1 = -2.*cos(omega);
+ t_float b2 = 1 - alpha*e_A(x->x_gain);
+ t_float a0 = 1 + alpha/e_A(x->x_gain);
+ t_float a1 = -2.*cos(omega);
+ t_float a2 = 1 - alpha/e_A(x->x_gain);
+
+/* 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("equ: 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 equ_float(t_rbjfilter *x,t_floatarg f)
+{
+ x->x_freq = f;
+ equ_bang(x);
+}
+
+
+static void *equ_new(t_floatarg f,t_floatarg g,t_floatarg bw)
+{
+ t_rbjfilter *x = (t_rbjfilter *)pd_new(equ_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;
+ if (g != 0.) x->x_gain = g;
+ return (x);
+}
+
+
+void equalizer_setup(void)
+{
+ equ_class = class_new(gensym("equalizer"), (t_newmethod)equ_new, 0,
+ sizeof(t_rbjfilter), 0,A_DEFFLOAT,A_DEFFLOAT,A_DEFFLOAT,0);
+ class_addbang(equ_class,equ_bang);
+ class_addfloat(equ_class,equ_float);
+}
+
+
+
+
+
diff --git a/filters/highpass.c b/filters/highpass.c
index e7e0443..901c742 100755
--- a/filters/highpass.c
+++ b/filters/highpass.c
@@ -1,87 +1,87 @@
-/* (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"
-
-
-/* ------------------- highpass ----------------------------*/
-
-static t_class *highpass_class;
-
-void highpass_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 = -(1 + cos(omega));
- t_float b0 = -b1/2.;
- 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("highpass: 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 highpass_float(t_rbjfilter *x,t_floatarg f)
-{
- x->x_freq = f;
- highpass_bang(x);
-}
-
-
-static void *highpass_new(t_floatarg f,t_floatarg bw)
-{
- t_rbjfilter *x = (t_rbjfilter *)pd_new(highpass_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 highpass_setup(void)
-{
- highpass_class = class_new(gensym("highpass"), (t_newmethod)highpass_new, 0,
- sizeof(t_rbjfilter), 0,A_DEFFLOAT,A_DEFFLOAT,0);
- class_addbang(highpass_class,highpass_bang);
- class_addfloat(highpass_class,highpass_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"
+
+
+/* ------------------- highpass ----------------------------*/
+
+static t_class *highpass_class;
+
+void highpass_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 = -(1 + cos(omega));
+ t_float b0 = -b1/2.;
+ 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("highpass: 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 highpass_float(t_rbjfilter *x,t_floatarg f)
+{
+ x->x_freq = f;
+ highpass_bang(x);
+}
+
+
+static void *highpass_new(t_floatarg f,t_floatarg bw)
+{
+ t_rbjfilter *x = (t_rbjfilter *)pd_new(highpass_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 highpass_setup(void)
+{
+ highpass_class = class_new(gensym("highpass"), (t_newmethod)highpass_new, 0,
+ sizeof(t_rbjfilter), 0,A_DEFFLOAT,A_DEFFLOAT,0);
+ class_addbang(highpass_class,highpass_bang);
+ class_addfloat(highpass_class,highpass_float);
+}
+
+
+
+
diff --git a/filters/highshelf.c b/filters/highshelf.c
index ee6006c..5af6132 100755
--- a/filters/highshelf.c
+++ b/filters/highshelf.c
@@ -1,90 +1,90 @@
-/* (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"
-
-
-/* ------------------- highshelf ----------------------------*/
-
-static t_class *highshelf_class;
-
-void highshelf_bang(t_rbjfilter *x)
-{
- t_atom at[5];
- t_float omega = e_omega(x->x_freq,x->x_rate);
- t_float A = e_A(x->x_gain);
- t_float cs = cos(omega);
- t_float sn = sin(omega);
- t_float beta = e_beta(A,x->x_bw* 0.01);
-
- t_float b0 = A*((A+1) + (A-1)*cs + beta*sn);
- t_float b1 =-2.*A*((A-1) + (A+1)*cs);
- t_float b2 = A*((A+1) + (A-1)*cs - beta*sn);
- t_float a0 = ((A+1) - (A-1)*cs + beta*sn);
- t_float a1 = 2.*((A-1) - (A+1)*cs);
- t_float a2 = ((A+1) - (A-1)*cs - beta*sn);
-
-/* 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("highshelf: 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 highshelf_float(t_rbjfilter *x,t_floatarg f)
-{
- x->x_freq = f;
- highshelf_bang(x);
-}
-
-
-static void *highshelf_new(t_floatarg f,t_floatarg g,t_floatarg bw)
-{
- t_rbjfilter *x = (t_rbjfilter *)pd_new(highshelf_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;
- if (g != 0.) x->x_gain = g;
- return (x);
-}
-
-
-void highshelf_setup(void)
-{
- highshelf_class = class_new(gensym("highshelf"), (t_newmethod)highshelf_new, 0,
- sizeof(t_rbjfilter), 0,A_DEFFLOAT,A_DEFFLOAT,A_DEFFLOAT,0);
- class_addbang(highshelf_class,highshelf_bang);
- class_addfloat(highshelf_class,highshelf_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"
+
+
+/* ------------------- highshelf ----------------------------*/
+
+static t_class *highshelf_class;
+
+void highshelf_bang(t_rbjfilter *x)
+{
+ t_atom at[5];
+ t_float omega = e_omega(x->x_freq,x->x_rate);
+ t_float A = e_A(x->x_gain);
+ t_float cs = cos(omega);
+ t_float sn = sin(omega);
+ t_float beta = e_beta(A,x->x_bw* 0.01);
+
+ t_float b0 = A*((A+1) + (A-1)*cs + beta*sn);
+ t_float b1 =-2.*A*((A-1) + (A+1)*cs);
+ t_float b2 = A*((A+1) + (A-1)*cs - beta*sn);
+ t_float a0 = ((A+1) - (A-1)*cs + beta*sn);
+ t_float a1 = 2.*((A-1) - (A+1)*cs);
+ t_float a2 = ((A+1) - (A-1)*cs - beta*sn);
+
+/* 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("highshelf: 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 highshelf_float(t_rbjfilter *x,t_floatarg f)
+{
+ x->x_freq = f;
+ highshelf_bang(x);
+}
+
+
+static void *highshelf_new(t_floatarg f,t_floatarg g,t_floatarg bw)
+{
+ t_rbjfilter *x = (t_rbjfilter *)pd_new(highshelf_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;
+ if (g != 0.) x->x_gain = g;
+ return (x);
+}
+
+
+void highshelf_setup(void)
+{
+ highshelf_class = class_new(gensym("highshelf"), (t_newmethod)highshelf_new, 0,
+ sizeof(t_rbjfilter), 0,A_DEFFLOAT,A_DEFFLOAT,A_DEFFLOAT,0);
+ class_addbang(highshelf_class,highshelf_bang);
+ class_addfloat(highshelf_class,highshelf_float);
+}
+
+
diff --git a/filters/hlshelf.c b/filters/hlshelf.c
index a2189d7..7cf99c5 100755
--- a/filters/hlshelf.c
+++ b/filters/hlshelf.c
@@ -1,226 +1,226 @@
-/* (C) Guenter Geiger <geiger@epy.co.at> */
-
-
-#include <m_pd.h>
-#include <math.h>
-
-#ifdef NT
-#pragma warning( disable : 4244 )
-#pragma warning( disable : 4305 )
-#endif
-
-/* ------------------------ hlshelf ----------------------------- */
-
-
-#ifndef M_PI
-#define M_PI 3.141593f
-#endif
-
-#define SRATE 44100.0
-#define MAX_GAIN 120.0f
-
-static t_class *hlshelf_class;
-
-
-typedef struct _hlshelf
-{
- t_object x_obj;
- float s_rate;
- float s_gain0;
- float s_gain1;
- float s_gain2;
- float s_ltransfq;
- float s_htransfq;
- float s_lradians;
- float s_hradians;
-} t_hlshelf;
-
-
-int hlshelf_check_stability(t_float fb1,
- t_float fb2,
- t_float ff1,
- t_float ff2,
- t_float ff3)
-{
- float discriminant = fb1 * fb1 + 4 * fb2;
-
- if (discriminant < 0) /* imaginary roots -- resonant filter */
- {
- /* they're conjugates so we just check that the product
- is less than one */
- if (fb2 >= -1.0f) goto stable;
- }
- else /* real roots */
- {
- /* check that the parabola 1 - fb1 x - fb2 x^2 has a
- vertex between -1 and 1, and that it's nonnegative
- at both ends, which implies both roots are in [1-,1]. */
- if (fb1 <= 2.0f && fb1 >= -2.0f &&
- 1.0f - fb1 -fb2 >= 0 && 1.0f + fb1 - fb2 >= 0)
- goto stable;
- }
- return 0;
-stable:
- return 1;
-}
-
-
-void hlshelf_check(t_hlshelf *x)
-{
-
- if(x->s_gain0 - x->s_gain1 > MAX_GAIN) {
- x->s_gain0 = x->s_gain1 + MAX_GAIN;
- post("setting gain0 to %f",x->s_gain0);
- }
-
-
- if(x->s_gain1 > MAX_GAIN) {
- x->s_gain1 = MAX_GAIN;
- post("setting gain1 to %f",x->s_gain1);
- }
-
- if(x->s_gain2 - x->s_gain1 > MAX_GAIN) {
- x->s_gain2 = x->s_gain1 + MAX_GAIN;
- post("setting gain2 to %f",x->s_gain2);
- }
-
- /* constrain: 0 <= x->s_ltransfq < x->s_htransfq. */
- x->s_ltransfq = (x->s_ltransfq < x->s_htransfq) ? x->s_ltransfq : x->s_htransfq - 0.5f;
-
- if (x->s_ltransfq < 0) x->s_ltransfq = 0.0f;
-
- x->s_lradians = M_PI * x->s_ltransfq / x->s_rate;
- x->s_hradians= M_PI * (0.5f - (x->s_htransfq / x->s_rate));
-
-}
-
-
-void hlshelf_bang(t_hlshelf *x)
-{
- t_atom at[6];
- float c0, c1, c2, d0, d1, d2; /* output coefs */
- float a1, a2, b1, b2, g1, g2; /* temp coefs */
- double xf;
-
- hlshelf_check(x);
-
- /* low shelf */
- xf = 0.5 * 0.115129255 * (double)(x->s_gain0 - x->s_gain1); /* ln(10) / 20 = 0.115129255 */
- if(xf < -200.) /* exp(x) -> 0 */
- {
- a1 = 1.0f;
- b1 = -1.0f;
- g1 = 0.0f;
- }
- else
- {
- double t = tan(x->s_lradians);
- double e = exp(xf);
- double r = t / e;
- double kr = t * e;
-
- a1 = (r - 1) / (r + 1);
- b1 = (kr - 1) / (kr + 1);
- g1 = (kr + 1) / (r + 1);
- }
-
- /* high shelf */
- xf = 0.5 * 0.115129255 * (double)(x->s_gain2 - x->s_gain1); /* ln(10) / 20 = 0.115129255 */
- if(xf < -200.) /* exp(x) -> 0 */
- {
- a2 = -1.0f;
- b2 = 1.0f;
- g2 = 0.0f;
- }
- else
- {
- double t = tan(x->s_hradians);
- double e = exp(xf);
- double r = t / e;
- double kr = t * e;
-
- a2 = (1 - r) / (1 + r);
- b2 = (1 - kr) / (1 + kr);
- g2 = (1 + kr) / (1 + r);
- }
-
- /* form product */
- c0 = g1 * g2 * (float)(exp((double)(x->s_gain1) * 0.05f * 2.302585093f)); ;
- c1 = a1 + a2;
- c2 = a1 * a2;
- d0 = 1.0f;
- d1 = b1 + b2;
- d2 = b1 * b2;
-
- if (!hlshelf_check_stability(-c1/d0,-c2/d0,d0/d0,d1/d0,d2/d0)) {
- post("hlshelf: filter unstable -> resetting");
- c0=1.;c1=0.;c2=0.;
- d0=1.;d1=0.;d2=0.;
- }
-
- SETFLOAT(at,-c1/d0);
- SETFLOAT(at+1,-c2/d0);
- SETFLOAT(at+2,d0/d0);
- SETFLOAT(at+3,d1/d0);
- SETFLOAT(at+4,d2/d0);
-
- outlet_list(x->x_obj.ob_outlet,&s_list,5,at);
-}
-
-void hlshelf_float(t_hlshelf *x,t_floatarg f)
-{
- x->s_gain0 = f;
- hlshelf_bang(x);
-}
-
-
-static void *hlshelf_new(t_symbol* s,t_int argc, t_atom* at)
-{
- t_hlshelf *x = (t_hlshelf *)pd_new(hlshelf_class);
- t_float k0 = atom_getfloat(at);
- t_float k1 = atom_getfloat(at+1);
- t_float k2 = atom_getfloat(at+2);
- t_float f1 = atom_getfloat(at+3);
- t_float f2 = atom_getfloat(at+4);
-
-
- f1 = atom_getfloat(at);
- f2 = atom_getfloat(at);
-
- if ((f1 == 0.0f && f2 == 0.0f) || f1 > f2){ /* all gains = 0db */
- f1 = 150.0f;
- f2 = 5000.0f;
- }
-
- if (f1 < 0) f1 = 0.0f;
- if (f2 > SRATE) f2 = .5f*SRATE;
-
- x->s_rate = SRATE; /* srate default */
- x->s_gain0 = k0;
- x->s_gain1 = k1;
- x->s_gain2 = k2;
-
- x->s_ltransfq = 0.0f;
- x->s_htransfq = SRATE/2;
-
- x->s_lradians = M_PI * x->s_ltransfq / x->s_rate;
- x->s_hradians= M_PI * (0.5f - (x->s_htransfq / x->s_rate));
-
- floatinlet_new(&x->x_obj, &x->s_gain1);
- floatinlet_new(&x->x_obj, &x->s_gain2);
- floatinlet_new(&x->x_obj, &x->s_ltransfq);
- floatinlet_new(&x->x_obj, &x->s_htransfq);
- outlet_new(&x->x_obj, &s_list);
-
- return (x);
-}
-
-void hlshelf_setup(void)
-{
- hlshelf_class = class_new(gensym("hlshelf"), (t_newmethod)hlshelf_new, 0,
- sizeof(t_hlshelf), 0, A_GIMME, 0);
- class_addbang(hlshelf_class,hlshelf_bang);
- class_addfloat(hlshelf_class,hlshelf_float);
-}
-
-
+/* (C) Guenter Geiger <geiger@epy.co.at> */
+
+
+#include <m_pd.h>
+#include <math.h>
+
+#ifdef _MSC_VER
+#pragma warning( disable : 4244 )
+#pragma warning( disable : 4305 )
+#endif
+
+/* ------------------------ hlshelf ----------------------------- */
+
+
+#ifndef M_PI
+#define M_PI 3.141593f
+#endif
+
+#define SRATE 44100.0
+#define MAX_GAIN 120.0f
+
+static t_class *hlshelf_class;
+
+
+typedef struct _hlshelf
+{
+ t_object x_obj;
+ float s_rate;
+ float s_gain0;
+ float s_gain1;
+ float s_gain2;
+ float s_ltransfq;
+ float s_htransfq;
+ float s_lradians;
+ float s_hradians;
+} t_hlshelf;
+
+
+int hlshelf_check_stability(t_float fb1,
+ t_float fb2,
+ t_float ff1,
+ t_float ff2,
+ t_float ff3)
+{
+ float discriminant = fb1 * fb1 + 4 * fb2;
+
+ if (discriminant < 0) /* imaginary roots -- resonant filter */
+ {
+ /* they're conjugates so we just check that the product
+ is less than one */
+ if (fb2 >= -1.0f) goto stable;
+ }
+ else /* real roots */
+ {
+ /* check that the parabola 1 - fb1 x - fb2 x^2 has a
+ vertex between -1 and 1, and that it's nonnegative
+ at both ends, which implies both roots are in [1-,1]. */
+ if (fb1 <= 2.0f && fb1 >= -2.0f &&
+ 1.0f - fb1 -fb2 >= 0 && 1.0f + fb1 - fb2 >= 0)
+ goto stable;
+ }
+ return 0;
+stable:
+ return 1;
+}
+
+
+void hlshelf_check(t_hlshelf *x)
+{
+
+ if(x->s_gain0 - x->s_gain1 > MAX_GAIN) {
+ x->s_gain0 = x->s_gain1 + MAX_GAIN;
+ post("setting gain0 to %f",x->s_gain0);
+ }
+
+
+ if(x->s_gain1 > MAX_GAIN) {
+ x->s_gain1 = MAX_GAIN;
+ post("setting gain1 to %f",x->s_gain1);
+ }
+
+ if(x->s_gain2 - x->s_gain1 > MAX_GAIN) {
+ x->s_gain2 = x->s_gain1 + MAX_GAIN;
+ post("setting gain2 to %f",x->s_gain2);
+ }
+
+ /* constrain: 0 <= x->s_ltransfq < x->s_htransfq. */
+ x->s_ltransfq = (x->s_ltransfq < x->s_htransfq) ? x->s_ltransfq : x->s_htransfq - 0.5f;
+
+ if (x->s_ltransfq < 0) x->s_ltransfq = 0.0f;
+
+ x->s_lradians = M_PI * x->s_ltransfq / x->s_rate;
+ x->s_hradians= M_PI * (0.5f - (x->s_htransfq / x->s_rate));
+
+}
+
+
+void hlshelf_bang(t_hlshelf *x)
+{
+ t_atom at[6];
+ float c0, c1, c2, d0, d1, d2; /* output coefs */
+ float a1, a2, b1, b2, g1, g2; /* temp coefs */
+ double xf;
+
+ hlshelf_check(x);
+
+ /* low shelf */
+ xf = 0.5 * 0.115129255 * (double)(x->s_gain0 - x->s_gain1); /* ln(10) / 20 = 0.115129255 */
+ if(xf < -200.) /* exp(x) -> 0 */
+ {
+ a1 = 1.0f;
+ b1 = -1.0f;
+ g1 = 0.0f;
+ }
+ else
+ {
+ double t = tan(x->s_lradians);
+ double e = exp(xf);
+ double r = t / e;
+ double kr = t * e;
+
+ a1 = (r - 1) / (r + 1);
+ b1 = (kr - 1) / (kr + 1);
+ g1 = (kr + 1) / (r + 1);
+ }
+
+ /* high shelf */
+ xf = 0.5 * 0.115129255 * (double)(x->s_gain2 - x->s_gain1); /* ln(10) / 20 = 0.115129255 */
+ if(xf < -200.) /* exp(x) -> 0 */
+ {
+ a2 = -1.0f;
+ b2 = 1.0f;
+ g2 = 0.0f;
+ }
+ else
+ {
+ double t = tan(x->s_hradians);
+ double e = exp(xf);
+ double r = t / e;
+ double kr = t * e;
+
+ a2 = (1 - r) / (1 + r);
+ b2 = (1 - kr) / (1 + kr);
+ g2 = (1 + kr) / (1 + r);
+ }
+
+ /* form product */
+ c0 = g1 * g2 * (float)(exp((double)(x->s_gain1) * 0.05f * 2.302585093f)); ;
+ c1 = a1 + a2;
+ c2 = a1 * a2;
+ d0 = 1.0f;
+ d1 = b1 + b2;
+ d2 = b1 * b2;
+
+ if (!hlshelf_check_stability(-c1/d0,-c2/d0,d0/d0,d1/d0,d2/d0)) {
+ post("hlshelf: filter unstable -> resetting");
+ c0=1.;c1=0.;c2=0.;
+ d0=1.;d1=0.;d2=0.;
+ }
+
+ SETFLOAT(at,-c1/d0);
+ SETFLOAT(at+1,-c2/d0);
+ SETFLOAT(at+2,d0/d0);
+ SETFLOAT(at+3,d1/d0);
+ SETFLOAT(at+4,d2/d0);
+
+ outlet_list(x->x_obj.ob_outlet,&s_list,5,at);
+}
+
+void hlshelf_float(t_hlshelf *x,t_floatarg f)
+{
+ x->s_gain0 = f;
+ hlshelf_bang(x);
+}
+
+
+static void *hlshelf_new(t_symbol* s,t_int argc, t_atom* at)
+{
+ t_hlshelf *x = (t_hlshelf *)pd_new(hlshelf_class);
+ t_float k0 = atom_getfloat(at);
+ t_float k1 = atom_getfloat(at+1);
+ t_float k2 = atom_getfloat(at+2);
+ t_float f1 = atom_getfloat(at+3);
+ t_float f2 = atom_getfloat(at+4);
+
+
+ f1 = atom_getfloat(at);
+ f2 = atom_getfloat(at);
+
+ if ((f1 == 0.0f && f2 == 0.0f) || f1 > f2){ /* all gains = 0db */
+ f1 = 150.0f;
+ f2 = 5000.0f;
+ }
+
+ if (f1 < 0) f1 = 0.0f;
+ if (f2 > SRATE) f2 = .5f*SRATE;
+
+ x->s_rate = SRATE; /* srate default */
+ x->s_gain0 = k0;
+ x->s_gain1 = k1;
+ x->s_gain2 = k2;
+
+ x->s_ltransfq = 0.0f;
+ x->s_htransfq = SRATE/2;
+
+ x->s_lradians = M_PI * x->s_ltransfq / x->s_rate;
+ x->s_hradians= M_PI * (0.5f - (x->s_htransfq / x->s_rate));
+
+ floatinlet_new(&x->x_obj, &x->s_gain1);
+ floatinlet_new(&x->x_obj, &x->s_gain2);
+ floatinlet_new(&x->x_obj, &x->s_ltransfq);
+ floatinlet_new(&x->x_obj, &x->s_htransfq);
+ outlet_new(&x->x_obj, &s_list);
+
+ return (x);
+}
+
+void hlshelf_setup(void)
+{
+ hlshelf_class = class_new(gensym("hlshelf"), (t_newmethod)hlshelf_new, 0,
+ sizeof(t_hlshelf), 0, A_GIMME, 0);
+ class_addbang(hlshelf_class,hlshelf_bang);
+ class_addfloat(hlshelf_class,hlshelf_float);
+}
+
+
diff --git a/filters/lowpass.c b/filters/lowpass.c
index 4e1b2b9..7155044 100755
--- a/filters/lowpass.c
+++ b/filters/lowpass.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"
-
-
-
-/* ------------------- lowpass ----------------------------*/
-
-static t_class *lowpass_class;
-
-void lowpass_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 = 1 - cos(omega);
- t_float b0 = b1/2.;
- 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("lowpass: 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 lowpass_float(t_rbjfilter *x,t_floatarg f)
-{
- x->x_freq = f;
- lowpass_bang(x);
-}
-
-
-static void *lowpass_new(t_floatarg f,t_floatarg bw)
-{
- t_rbjfilter *x = (t_rbjfilter *)pd_new(lowpass_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 lowpass_setup(void)
-{
- lowpass_class = class_new(gensym("lowpass"), (t_newmethod)lowpass_new, 0,
- sizeof(t_rbjfilter), 0,A_DEFFLOAT,A_DEFFLOAT,0);
- class_addbang(lowpass_class,lowpass_bang);
- class_addfloat(lowpass_class,lowpass_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"
+
+
+
+/* ------------------- lowpass ----------------------------*/
+
+static t_class *lowpass_class;
+
+void lowpass_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 = 1 - cos(omega);
+ t_float b0 = b1/2.;
+ 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("lowpass: 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 lowpass_float(t_rbjfilter *x,t_floatarg f)
+{
+ x->x_freq = f;
+ lowpass_bang(x);
+}
+
+
+static void *lowpass_new(t_floatarg f,t_floatarg bw)
+{
+ t_rbjfilter *x = (t_rbjfilter *)pd_new(lowpass_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 lowpass_setup(void)
+{
+ lowpass_class = class_new(gensym("lowpass"), (t_newmethod)lowpass_new, 0,
+ sizeof(t_rbjfilter), 0,A_DEFFLOAT,A_DEFFLOAT,0);
+ class_addbang(lowpass_class,lowpass_bang);
+ class_addfloat(lowpass_class,lowpass_float);
+}
+
+
+
+
diff --git a/filters/lowshelf.c b/filters/lowshelf.c
index dd925dc..946de89 100755
--- a/filters/lowshelf.c
+++ b/filters/lowshelf.c
@@ -1,91 +1,91 @@
-/* (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"
-
-
-
-/* ------------------- lowshelf ----------------------------*/
-
-static t_class *lowshelf_class;
-
-void lowshelf_bang(t_rbjfilter *x)
-{
- t_atom at[5];
- t_float omega = e_omega(x->x_freq,x->x_rate);
- t_float A = e_A(x->x_gain);
- t_float cs = cos(omega);
- t_float sn = sin(omega);
- t_float beta = e_beta(A,x->x_bw*0.01);
-
- t_float b0 = A*((A+1) - (A-1)*cs + beta*sn);
- t_float b1 = 2.*A*((A-1) - (A+1)*cs);
- t_float b2 = A*((A+1) - (A-1)*cs - beta*sn);
- t_float a0 = ((A+1) + (A-1)*cs + beta*sn);
- t_float a1 = -2.*((A-1) + (A+1)*cs);
- t_float a2 = ((A+1) + (A-1)*cs - beta*sn);
-
-/* 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("lowshelf: 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 lowshelf_float(t_rbjfilter *x,t_floatarg f)
-{
- x->x_freq = f;
- lowshelf_bang(x);
-}
-
-
-static void *lowshelf_new(t_floatarg f,t_floatarg g,t_floatarg bw)
-{
- t_rbjfilter *x = (t_rbjfilter *)pd_new(lowshelf_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;
- if (g != 0.) x->x_gain = g;
- return (x);
-}
-
-
-void lowshelf_setup(void)
-{
- lowshelf_class = class_new(gensym("lowshelf"), (t_newmethod)lowshelf_new, 0,
- sizeof(t_rbjfilter), 0,A_DEFFLOAT,A_DEFFLOAT,A_DEFFLOAT,0);
- class_addbang(lowshelf_class,lowshelf_bang);
- class_addfloat(lowshelf_class,lowshelf_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"
+
+
+
+/* ------------------- lowshelf ----------------------------*/
+
+static t_class *lowshelf_class;
+
+void lowshelf_bang(t_rbjfilter *x)
+{
+ t_atom at[5];
+ t_float omega = e_omega(x->x_freq,x->x_rate);
+ t_float A = e_A(x->x_gain);
+ t_float cs = cos(omega);
+ t_float sn = sin(omega);
+ t_float beta = e_beta(A,x->x_bw*0.01);
+
+ t_float b0 = A*((A+1) - (A-1)*cs + beta*sn);
+ t_float b1 = 2.*A*((A-1) - (A+1)*cs);
+ t_float b2 = A*((A+1) - (A-1)*cs - beta*sn);
+ t_float a0 = ((A+1) + (A-1)*cs + beta*sn);
+ t_float a1 = -2.*((A-1) + (A+1)*cs);
+ t_float a2 = ((A+1) + (A-1)*cs - beta*sn);
+
+/* 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("lowshelf: 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 lowshelf_float(t_rbjfilter *x,t_floatarg f)
+{
+ x->x_freq = f;
+ lowshelf_bang(x);
+}
+
+
+static void *lowshelf_new(t_floatarg f,t_floatarg g,t_floatarg bw)
+{
+ t_rbjfilter *x = (t_rbjfilter *)pd_new(lowshelf_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;
+ if (g != 0.) x->x_gain = g;
+ return (x);
+}
+
+
+void lowshelf_setup(void)
+{
+ lowshelf_class = class_new(gensym("lowshelf"), (t_newmethod)lowshelf_new, 0,
+ sizeof(t_rbjfilter), 0,A_DEFFLOAT,A_DEFFLOAT,A_DEFFLOAT,0);
+ class_addbang(lowshelf_class,lowshelf_bang);
+ class_addfloat(lowshelf_class,lowshelf_float);
+}
+
+
diff --git a/filters/moog~.c b/filters/moog~.c
index 8f4dbea..12f8cf2 100755
--- a/filters/moog~.c
+++ b/filters/moog~.c
@@ -1,182 +1,182 @@
-/* (C) Guenter Geiger <geiger@epy.co.at> */
-
-
-#include "math.h"
-#include <m_pd.h>
-
-/* ----------------------------- moog ----------------------------- */
-static t_class *moog_class;
-
-
-typedef struct _moog
-{
- t_object x_obj;
- t_pd in2;
- t_float x_1,x_2,x_3,x_4;
- t_float y_1,y_2,y_3,y_4;
-} t_moog;
-
-static void moog_reset(t_moog *x)
-{
- x->x_1 = x->x_2 = x->x_3 = x->x_4 = 0.0;
- x->y_1 = x->y_2 = x->y_3 = x->y_4 = 0.0;
-
-}
-
-
-
-static void *moog_new(t_symbol *s, int argc, t_atom *argv)
-{
- if (argc > 1) post("moog~: extra arguments ignored");
- {
- t_moog *x = (t_moog *)pd_new(moog_class);
- outlet_new(&x->x_obj, &s_signal);
- inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_signal, &s_signal);
- inlet_new(&x->x_obj, &x->in2, &s_signal, &s_signal);
- moog_reset(x);
- return (x);
- }
-
-
-}
-
-
-
-static t_float calc_k(t_float f,t_float k) {
- if (k>4.) k =4.;
- if (k < 0.) k = 0.;
- if (f <= 3800) return k;
- k = k - 0.5*((f-3800)/4300);
- return k;
-}
-
-t_int *moog_perform(t_int *w)
-{
- t_moog* x = (t_moog*) (w[1]);
- t_float *in1 = (t_float *)(w[2]);
- t_float *p = (t_float *)(w[3]);
- t_float *k = (t_float *)(w[4]);
-
- t_float *out = (t_float *)(w[5]);
- int n = (int)(w[6]);
- float in;
- float pt,pt1;
-
- float x1 = x->x_1;
- float x2 = x->x_2;
- float x3 = x->x_3;
- float x4 = x->x_4;
- float ys1 = x->y_1;
- float ys2 = x->y_2;
- float ys3 = x->y_3;
- float ys4 = x->y_4;
-
-
- while (n--) {
- if (*p > 8140) *p = 8140.;
- *k = calc_k(*p,*k);
- pt =*p;
- pt1=(pt+1)*0.76923077;
- in = *in1++ - *k*ys4;
- ys1 = (pt1)*in + 0.3*x1 - pt*ys1;
- x1 = in;
- ys2 = (pt1)*ys1 + 0.3*x2 - pt*ys2;
- x2 = ys1;
- ys3 = (pt1)*ys2 + 0.3 *x3 - pt*ys3;
- x3 = ys2;
- ys4 = (pt1)*ys3 + 0.3*x4 - pt*ys4;
- x4 = ys3;
- *out++ = ys4;
- }
-
-
- x->y_1 = ys1;
- x->y_2 = ys2;
- x->y_3 = ys3;
- x->y_4 = ys4;
- x->x_1 = x1;
- x->x_2 = x2;
- x->x_3 = x3;
- x->x_4 = x4;
-
- return (w+7);
-}
-
-
-#define CLIP(x) x = ((x) > 1.0 ? (1.0) : (x))
-
-t_int *moog_perf8(t_int *w)
-{
- t_moog* x = (t_moog*) (w[1]);
- t_float *in1 = (t_float *)(w[2]);
- t_float *p = (t_float *)(w[3]);
- t_float *k = (t_float *)(w[4]);
- t_float *out = (t_float *)(w[5]);
- int n = (int)(w[6]);
-
- t_float x1 = x->x_1;
- t_float x2 = x->x_2;
- t_float x3 = x->x_3;
- t_float x4 = x->x_4;
- t_float ys1 = x->y_1;
- t_float ys2 = x->y_2;
- t_float ys3 = x->y_3;
- t_float ys4 = x->y_4;
- t_float temp,temp2;
- t_float pt,pt1;
- t_float in;
-
- while (n--) {
- if (*p > 8140.) *p = 8140.;
- *k = calc_k(*p,*k);
-
- pt =*p* 0.01*0.0140845 - 0.9999999f;
- pt1=(pt+1.0)*0.76923077;
- in = *in1++ - *k*ys4;
- ys1 = pt1*(in + 0.3*x1) - pt*ys1;
- x1 = in;
- ys2 = pt1*(ys1 + 0.3*x2) - pt*ys2;
- x2 = ys1;
- ys3 = pt1*(ys2 + 0.3*x3) - pt*ys3;
- x3 = ys2;
- ys4 = pt1*(ys3 + 0.3*x4) - pt*ys4;
- x4 = ys3;
- *out++ = ys4;
-
- p++;k++;
- }
-
- x->y_1 = ys1;
- x->y_2 = ys2;
- x->y_3 = ys3;
- x->y_4 = ys4;
- x->x_1 = x1;
- x->x_2 = x2;
- x->x_3 = x3;
- x->x_4 = x4;
-
- return (w+7);
-}
-
-void dsp_add_moog(t_moog *x, t_sample *in1, t_sample *in2, t_sample *in3, t_sample *out, int n)
-{
- if (n&7)
- dsp_add(moog_perform, 6,(t_int)x, in1,in2,in3, out, n);
- else
- dsp_add(moog_perf8, 6,(t_int) x, in1, in2, in3, out, n);
-}
-
-static void moog_dsp(t_moog *x, t_signal **sp)
-{
- dsp_add_moog(x,sp[0]->s_vec, sp[1]->s_vec, sp[2]->s_vec, sp[3]->s_vec,sp[0]->s_n);
-}
-
-
-void moog_tilde_setup(void)
-{
- moog_class = class_new(gensym("moog~"), (t_newmethod)moog_new, 0,
- sizeof(t_moog), 0, A_GIMME, 0);
- class_addmethod(moog_class, nullfn, gensym("signal"), 0);
- class_addmethod(moog_class, (t_method)moog_reset, gensym("reset"), 0);
- class_addmethod(moog_class, (t_method)moog_dsp, gensym("dsp"), A_NULL);
-}
+/* (C) Guenter Geiger <geiger@epy.co.at> */
+
+
+#include "math.h"
+#include <m_pd.h>
+
+/* ----------------------------- moog ----------------------------- */
+static t_class *moog_class;
+
+
+typedef struct _moog
+{
+ t_object x_obj;
+ t_pd in2;
+ t_float x_1,x_2,x_3,x_4;
+ t_float y_1,y_2,y_3,y_4;
+} t_moog;
+
+static void moog_reset(t_moog *x)
+{
+ x->x_1 = x->x_2 = x->x_3 = x->x_4 = 0.0;
+ x->y_1 = x->y_2 = x->y_3 = x->y_4 = 0.0;
+
+}
+
+
+
+static void *moog_new(t_symbol *s, int argc, t_atom *argv)
+{
+ if (argc > 1) post("moog~: extra arguments ignored");
+ {
+ t_moog *x = (t_moog *)pd_new(moog_class);
+ outlet_new(&x->x_obj, &s_signal);
+ inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_signal, &s_signal);
+ inlet_new(&x->x_obj, &x->in2, &s_signal, &s_signal);
+ moog_reset(x);
+ return (x);
+ }
+
+
+}
+
+
+
+static t_float calc_k(t_float f,t_float k) {
+ if (k>4.) k =4.;
+ if (k < 0.) k = 0.;
+ if (f <= 3800) return k;
+ k = k - 0.5*((f-3800)/4300);
+ return k;
+}
+
+t_int *moog_perform(t_int *w)
+{
+ t_moog* x = (t_moog*) (w[1]);
+ t_float *in1 = (t_float *)(w[2]);
+ t_float *p = (t_float *)(w[3]);
+ t_float *k = (t_float *)(w[4]);
+
+ t_float *out = (t_float *)(w[5]);
+ int n = (int)(w[6]);
+ float in;
+ float pt,pt1;
+
+ float x1 = x->x_1;
+ float x2 = x->x_2;
+ float x3 = x->x_3;
+ float x4 = x->x_4;
+ float ys1 = x->y_1;
+ float ys2 = x->y_2;
+ float ys3 = x->y_3;
+ float ys4 = x->y_4;
+
+
+ while (n--) {
+ if (*p > 8140) *p = 8140.;
+ *k = calc_k(*p,*k);
+ pt =*p;
+ pt1=(pt+1)*0.76923077;
+ in = *in1++ - *k*ys4;
+ ys1 = (pt1)*in + 0.3*x1 - pt*ys1;
+ x1 = in;
+ ys2 = (pt1)*ys1 + 0.3*x2 - pt*ys2;
+ x2 = ys1;
+ ys3 = (pt1)*ys2 + 0.3 *x3 - pt*ys3;
+ x3 = ys2;
+ ys4 = (pt1)*ys3 + 0.3*x4 - pt*ys4;
+ x4 = ys3;
+ *out++ = ys4;
+ }
+
+
+ x->y_1 = ys1;
+ x->y_2 = ys2;
+ x->y_3 = ys3;
+ x->y_4 = ys4;
+ x->x_1 = x1;
+ x->x_2 = x2;
+ x->x_3 = x3;
+ x->x_4 = x4;
+
+ return (w+7);
+}
+
+
+#define CLIP(x) x = ((x) > 1.0 ? (1.0) : (x))
+
+t_int *moog_perf8(t_int *w)
+{
+ t_moog* x = (t_moog*) (w[1]);
+ t_float *in1 = (t_float *)(w[2]);
+ t_float *p = (t_float *)(w[3]);
+ t_float *k = (t_float *)(w[4]);
+ t_float *out = (t_float *)(w[5]);
+ int n = (int)(w[6]);
+
+ t_float x1 = x->x_1;
+ t_float x2 = x->x_2;
+ t_float x3 = x->x_3;
+ t_float x4 = x->x_4;
+ t_float ys1 = x->y_1;
+ t_float ys2 = x->y_2;
+ t_float ys3 = x->y_3;
+ t_float ys4 = x->y_4;
+ t_float temp,temp2;
+ t_float pt,pt1;
+ t_float in;
+
+ while (n--) {
+ if (*p > 8140.) *p = 8140.;
+ *k = calc_k(*p,*k);
+
+ pt =*p* 0.01*0.0140845 - 0.9999999f;
+ pt1=(pt+1.0)*0.76923077;
+ in = *in1++ - *k*ys4;
+ ys1 = pt1*(in + 0.3*x1) - pt*ys1;
+ x1 = in;
+ ys2 = pt1*(ys1 + 0.3*x2) - pt*ys2;
+ x2 = ys1;
+ ys3 = pt1*(ys2 + 0.3*x3) - pt*ys3;
+ x3 = ys2;
+ ys4 = pt1*(ys3 + 0.3*x4) - pt*ys4;
+ x4 = ys3;
+ *out++ = ys4;
+
+ p++;k++;
+ }
+
+ x->y_1 = ys1;
+ x->y_2 = ys2;
+ x->y_3 = ys3;
+ x->y_4 = ys4;
+ x->x_1 = x1;
+ x->x_2 = x2;
+ x->x_3 = x3;
+ x->x_4 = x4;
+
+ return (w+7);
+}
+
+void dsp_add_moog(t_moog *x, t_sample *in1, t_sample *in2, t_sample *in3, t_sample *out, int n)
+{
+ if (n&7)
+ dsp_add(moog_perform, 6,(t_int)x, in1,in2,in3, out, n);
+ else
+ dsp_add(moog_perf8, 6,(t_int) x, in1, in2, in3, out, n);
+}
+
+static void moog_dsp(t_moog *x, t_signal **sp)
+{
+ dsp_add_moog(x,sp[0]->s_vec, sp[1]->s_vec, sp[2]->s_vec, sp[3]->s_vec,sp[0]->s_n);
+}
+
+
+void moog_tilde_setup(void)
+{
+ moog_class = class_new(gensym("moog~"), (t_newmethod)moog_new, 0,
+ sizeof(t_moog), 0, A_GIMME, 0);
+ class_addmethod(moog_class, nullfn, gensym("signal"), 0);
+ class_addmethod(moog_class, (t_method)moog_reset, gensym("reset"), 0);
+ class_addmethod(moog_class, (t_method)moog_dsp, gensym("dsp"), A_NULL);
+}
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);
+}
+
+
+
+
+
generated by cgit v1.2.1 (git 2.18.0) at 2024-04-19 18:21:59 +0000