Accept FS #10244 by Wincent Balin: more pdbox work done for GSoC; also some keyword and line-ending fixes by me

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21626 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 93 insertions, 86 deletions

diff --git a/apps/plugins/pdbox/PDa/extra/lowpass.c b/apps/plugins/pdbox/PDa/extra/lowpass.c
index 251b7175f3..18de4afe8b 100644
--- a/apps/plugins/pdbox/PDa/extra/lowpass.c
+++ b/apps/plugins/pdbox/PDa/extra/lowpass.c
@@ -1,87 +1,94 @@
-/* (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
+
+*/
+
+#ifdef ROCKBOX
+#include "plugin.h"
+#include "pdbox.h"
+#include "m_pd.h"
+#include "math.h"
+#include "filters.h"
+#else /* ROCKBOX */
+#include "m_pd.h"
+#ifdef NT
+#pragma warning( disable : 4244 )
+#pragma warning( disable : 4305 )
+#endif
+#include <math.h>
+#include "filters.h"
+#endif /* ROCKBOX */
+
+
+/* ------------------- 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);
+}
+