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| author | Peter D'Hoye <peter.dhoye@gmail.com> | 2009-05-24 21:28:16 +0000 |
|---|---|---|
| committer | Peter D'Hoye <peter.dhoye@gmail.com> | 2009-05-24 21:28:16 +0000 |
| commit | 526b5580dabbfed7cfe5439dc3a90ec727f563c2 (patch) | |
| tree | 22b1af92348785daad16714ee5e2b633017e0e48 /apps/plugins/pdbox/PDa/extra/equalizer.c | |
| parent | 4f2dfcc01b260d946044ef2b6af5fe36cb772c8d (diff) | |
| download | rockbox-526b5580dabbfed7cfe5439dc3a90ec727f563c2.zip rockbox-526b5580dabbfed7cfe5439dc3a90ec727f563c2.tar.gz rockbox-526b5580dabbfed7cfe5439dc3a90ec727f563c2.tar.bz2 rockbox-526b5580dabbfed7cfe5439dc3a90ec727f563c2.tar.xz | |
Cut the files in half and it might work better (note to self: check your tree is really clean before patching)
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21070 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'apps/plugins/pdbox/PDa/extra/equalizer.c')
| -rw-r--r-- | apps/plugins/pdbox/PDa/extra/equalizer.c | 94 |
1 files changed, 1 insertions, 93 deletions
diff --git a/apps/plugins/pdbox/PDa/extra/equalizer.c b/apps/plugins/pdbox/PDa/extra/equalizer.c index 1d21c40..7438323 100644 --- a/apps/plugins/pdbox/PDa/extra/equalizer.c +++ b/apps/plugins/pdbox/PDa/extra/equalizer.c @@ -83,96 +83,4 @@ void equalizer_setup(void) 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);
-}
-
-
-
-
-
+ |