1 files changed, 178 insertions, 0 deletions
diff --git a/apps/plugins/pdbox/PDa/extra/equalizer.c b/apps/plugins/pdbox/PDa/extra/equalizer.c
new file mode 100644
index 0000000000..1d21c4087c
--- /dev/null
+++ b/apps/plugins/pdbox/PDa/extra/equalizer.c
@@ -0,0 +1,178 @@
+/* (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 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);
+}

diff --git a/apps/plugins/pdbox/PDa/extra/equalizer.c b/apps/plugins/pdbox/PDa/extra/equalizer.c new file mode 100644 index 0000000000..1d21c4087c --- /dev/null +++ b/apps/plugins/pdbox/PDa/extra/equalizer.c
@@ -0,0 +1,178 @@
	1	/* (C) Guenter Geiger <geiger@epy.co.at> */
	2
	3
	4	/*
	5
	6	These filter coefficients computations are taken from
	7	http://www.harmony-central.com/Computer/Programming/Audio-EQ-Cookbook.txt
	8
	9	written by Robert Bristow-Johnson
	10
	11	*/
	12
	13	#include "m_pd.h"
	14	#ifdef NT
	15	#pragma warning( disable : 4244 )
	16	#pragma warning( disable : 4305 )
	17	#endif
	18	#include <math.h>
	19	#include "filters.h"
	20
	21
	22
	23	/* ------------------- equ ----------------------------*/
	24	static t_class *equ_class;
	25
	26	void equ_bang(t_rbjfilter *x)
	27	{
	28	t_atom at[5];
	29	t_float omega = e_omega(x->x_freq,x->x_rate);
	30	t_float alpha = e_alpha(x->x_bw*0.01,omega);
	31	t_float b0 = 1 + alpha*e_A(x->x_gain);
	32	t_float b1 = -2.*cos(omega);
	33	t_float b2 = 1 - alpha*e_A(x->x_gain);
	34	t_float a0 = 1 + alpha/e_A(x->x_gain);
	35	t_float a1 = -2.*cos(omega);
	36	t_float a2 = 1 - alpha/e_A(x->x_gain);
	37
	38	/* post("bang %f %f %f",x->x_freq, x->x_gain, x->x_bw);*/
	39
	40	if (!check_stability(-a1/a0,-a2/a0,b0/a0,b1/a0,b2/a0)) {
	41	post("equ: filter unstable -> resetting");
	42	a0=1.;a1=0.;a2=0.;
	43	b0=1.;b1=0.;b2=0.;
	44	}
	45
	46	SETFLOAT(at,-a1/a0);
	47	SETFLOAT(at+1,-a2/a0);
	48	SETFLOAT(at+2,b0/a0);
	49	SETFLOAT(at+3,b1/a0);
	50	SETFLOAT(at+4,b2/a0);
	51
	52	outlet_list(x->x_obj.ob_outlet,&s_list,5,at);
	53	}
	54
	55
	56	void equ_float(t_rbjfilter *x,t_floatarg f)
	57	{
	58	x->x_freq = f;
	59	equ_bang(x);
	60	}
	61
	62
	63	static void *equ_new(t_floatarg f,t_floatarg g,t_floatarg bw)
	64	{
	65	t_rbjfilter x = (t_rbjfilter )pd_new(equ_class);
	66
	67	x->x_rate = 44100.0;
	68	outlet_new(&x->x_obj,&s_float);
	69	floatinlet_new(&x->x_obj, &x->x_gain);
	70	floatinlet_new(&x->x_obj, &x->x_bw);
	71	if (f > 0.) x->x_freq = f;
	72	if (bw > 0.) x->x_bw = bw;
	73	if (g != 0.) x->x_gain = g;
	74	return (x);
	75	}
	76
	77
	78	void equalizer_setup(void)
	79	{
	80	equ_class = class_new(gensym("equalizer"), (t_newmethod)equ_new, 0,
	81	sizeof(t_rbjfilter), 0,A_DEFFLOAT,A_DEFFLOAT,A_DEFFLOAT,0);
	82	class_addbang(equ_class,equ_bang);
	83	class_addfloat(equ_class,equ_float);
	84	}
	85
	86
	87
	88
	89
	90	/* (C) Guenter Geiger <geiger@epy.co.at> */
	91
	92
	93	/*
	94
	95	These filter coefficients computations are taken from
	96	http://www.harmony-central.com/Computer/Programming/Audio-EQ-Cookbook.txt
	97
	98	written by Robert Bristow-Johnson
	99
	100	*/
	101
	102	#include "m_pd.h"
	103	#ifdef NT
	104	#pragma warning( disable : 4244 )
	105	#pragma warning( disable : 4305 )
	106	#endif
	107	#include <math.h>
	108	#include "filters.h"
	109
	110
	111
	112	/* ------------------- equ ----------------------------*/
	113	static t_class *equ_class;
	114
	115	void equ_bang(t_rbjfilter *x)
	116	{
	117	t_atom at[5];
	118	t_float omega = e_omega(x->x_freq,x->x_rate);
	119	t_float alpha = e_alpha(x->x_bw*0.01,omega);
	120	t_float b0 = 1 + alpha*e_A(x->x_gain);
	121	t_float b1 = -2.*cos(omega);
	122	t_float b2 = 1 - alpha*e_A(x->x_gain);
	123	t_float a0 = 1 + alpha/e_A(x->x_gain);
	124	t_float a1 = -2.*cos(omega);
	125	t_float a2 = 1 - alpha/e_A(x->x_gain);
	126
	127	/* post("bang %f %f %f",x->x_freq, x->x_gain, x->x_bw);*/
	128
	129	if (!check_stability(-a1/a0,-a2/a0,b0/a0,b1/a0,b2/a0)) {
	130	post("equ: filter unstable -> resetting");
	131	a0=1.;a1=0.;a2=0.;
	132	b0=1.;b1=0.;b2=0.;
	133	}
	134
	135	SETFLOAT(at,-a1/a0);
	136	SETFLOAT(at+1,-a2/a0);
	137	SETFLOAT(at+2,b0/a0);
	138	SETFLOAT(at+3,b1/a0);
	139	SETFLOAT(at+4,b2/a0);
	140
	141	outlet_list(x->x_obj.ob_outlet,&s_list,5,at);
	142	}
	143
	144
	145	void equ_float(t_rbjfilter *x,t_floatarg f)
	146	{
	147	x->x_freq = f;
	148	equ_bang(x);
	149	}
	150
	151
	152	static void *equ_new(t_floatarg f,t_floatarg g,t_floatarg bw)
	153	{
	154	t_rbjfilter x = (t_rbjfilter )pd_new(equ_class);
	155
	156	x->x_rate = 44100.0;
	157	outlet_new(&x->x_obj,&s_float);
	158	floatinlet_new(&x->x_obj, &x->x_gain);
	159	floatinlet_new(&x->x_obj, &x->x_bw);
	160	if (f > 0.) x->x_freq = f;
	161	if (bw > 0.) x->x_bw = bw;
	162	if (g != 0.) x->x_gain = g;
	163	return (x);
	164	}
	165
	166
	167	void equalizer_setup(void)
	168	{
	169	equ_class = class_new(gensym("equalizer"), (t_newmethod)equ_new, 0,
	170	sizeof(t_rbjfilter), 0,A_DEFFLOAT,A_DEFFLOAT,A_DEFFLOAT,0);
	171	class_addbang(equ_class,equ_bang);
	172	class_addfloat(equ_class,equ_float);
	173	}
	174
	175
	176
	177
	178