1 files changed, 1 insertions, 74 deletions

diff --git a/apps/plugins/pdbox/PDa/extra/filters.h b/apps/plugins/pdbox/PDa/extra/filters.h
index 72d997e425..8a91f75073 100644
--- a/apps/plugins/pdbox/PDa/extra/filters.h
+++ b/apps/plugins/pdbox/PDa/extra/filters.h
@@ -72,77 +72,4 @@ stable:
 

 

 #endif

-/*

-

- These filter coefficients computations are taken from

- http://www.harmony-central.com/Computer/Programming/Audio-EQ-Cookbook.txt  

-

- written by Robert Bristow-Johnson

-

-*/

-

-

-#ifndef __GGEE_FILTERS_H__

-#define __GGEE_FILTERS_H__

-

-

-

-#ifndef M_PI

-#define M_PI 3.141593f

-#endif

-

-

-#include <math.h>

-#define LN2 0.69314718

-#define e_A(g) (pow(10,(g/40.)))

-#define e_omega(f,r) (2.0*M_PI*f/r)

-#define e_alpha(bw,omega) (sin(omega)*sinh(LN2/2. * bw * omega/sin(omega)))

-#define e_beta(a,S) (sqrt((a*a + 1)/(S) - (a-1)*(a-1)))

-

-

-

-

-typedef struct _rbjfilter

-{

-     t_object x_obj;

-     t_float  x_rate;

-     t_float  x_freq;

-     t_float  x_gain;

-     t_float  x_bw;

-} t_rbjfilter;

-

-

-static int 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;

-}

-

-

-

-

-

-

-#endif

+