From cdf8ded57019d5c905f16422d40be7b1a18ab3bc Mon Sep 17 00:00:00 2001 From: Tom Schouten Date: Tue, 21 Jan 2003 10:18:19 +0000 Subject: This commit was generated by cvs2svn to compensate for changes in r350, which included commits to RCS files with non-trunk default branches. svn path=/trunk/externals/creb/; revision=351 --- modules++/biquadseries.cc | 128 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 128 insertions(+) create mode 100644 modules++/biquadseries.cc (limited to 'modules++/biquadseries.cc') diff --git a/modules++/biquadseries.cc b/modules++/biquadseries.cc new file mode 100644 index 0000000..40b3aef --- /dev/null +++ b/modules++/biquadseries.cc @@ -0,0 +1,128 @@ +/* + * 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 + +#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); + +} + +} -- cgit v1.2.1