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-rw-r--r--modules++/biquadseries~.cc128
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diff --git a/modules++/biquadseries~.cc b/modules++/biquadseries~.cc
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+/*
+ * biquadseries.cc - second order section filter pd interface
+ * Copyright (c) 2000-2003 by Tom Schouten
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+
+#include "m_pd.h"
+#include <math.h>
+
+#include "DSPIcomplex.h"
+#include "DSPIfilters.h"
+
+
+
+typedef struct biquadseries_struct
+{
+ t_object x_obj;
+ t_float x_f;
+ DSPIfilterSeries* biquadseries;
+} t_biquadseries;
+
+void biquadseries_bang(t_biquadseries *x)
+{
+
+}
+
+void biquadseries_butterLP(t_biquadseries *x, t_floatarg f)
+{
+ x->biquadseries->setButterLP(f / sys_getsr());
+}
+
+void biquadseries_butterHP(t_biquadseries *x, t_floatarg f)
+{
+ x->biquadseries->setButterHP(f / sys_getsr());
+}
+
+
+
+static t_int *biquadseries_perform(t_int *w)
+{
+
+
+ t_float *in = (float *)(w[3]);
+ t_float *out = (float *)(w[4]);
+ DSPIfilterSeries* biquadseries = (DSPIfilterSeries *)(w[1]);
+ t_int n = (t_int)(w[2]);
+ t_int i;
+ t_float x;
+
+ // dit kan beter
+ float smooth = .01;
+ //1.0f - pow(.9f,1.0f/(float)(n));
+
+ for (i = 0; i < n; i++)
+ {
+ x = *in++;
+ biquadseries->BangSmooth(x, x, smooth);
+ *out++ = x;
+ }
+
+ return (w+5);
+}
+
+static void biquadseries_dsp(t_biquadseries *x, t_signal **sp)
+{
+ dsp_add(biquadseries_perform, 4, x->biquadseries, sp[0]->s_n, sp[0]->s_vec, sp[1]->s_vec);
+
+}
+void biquadseries_free(void)
+{
+
+}
+
+t_class *biquadseries_class;
+
+void *biquadseries_new(t_floatarg fsections)
+{
+ t_biquadseries *x = (t_biquadseries *)pd_new(biquadseries_class);
+
+ int sections = (int)fsections;
+ if (sections < 1) sections = 1;
+ // post("biquadseries~: %d sections", sections);
+ x->biquadseries = new DSPIfilterSeries(sections);
+
+ // inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("float"), gensym("freq"));
+ outlet_new(&x->x_obj, gensym("signal"));
+
+ biquadseries_butterLP(x, 10000);
+
+ return (void *)x;
+}
+
+
+extern "C" {
+
+void biquadseries_tilde_setup(void)
+{
+ //post("biquadseries~ v0.1");
+
+ biquadseries_class = class_new(gensym("biquadseries~"), (t_newmethod)biquadseries_new,
+ (t_method)biquadseries_free, sizeof(t_biquadseries), 0, A_DEFFLOAT, 0);
+
+ CLASS_MAINSIGNALIN(biquadseries_class, t_biquadseries, x_f);
+
+ class_addmethod(biquadseries_class, (t_method)biquadseries_bang, gensym("bang"), (t_atomtype)0);
+
+ class_addmethod(biquadseries_class, (t_method)biquadseries_dsp, gensym("dsp"), (t_atomtype)0);
+
+ class_addmethod(biquadseries_class, (t_method)biquadseries_butterLP, gensym("butterLP"), A_FLOAT, A_NULL);
+ class_addmethod(biquadseries_class, (t_method)biquadseries_butterHP, gensym("butterHP"), A_FLOAT, A_NULL);
+
+}
+
+}