From d6b088044e161a27d49df537bbb6d998a8d0e50d Mon Sep 17 00:00:00 2001 From: musil Date: Sat, 9 Dec 2006 02:00:52 +0000 Subject: // class_sethelpsymbol(); changed help-*.pd to *-help.pd chanded file structure to standard 1st step remove old svn path=/trunk/externals/iemlib/; revision=6756 --- src/iemlib1/biquad_freq_resp.c | 86 ------------------------------------------ 1 file changed, 86 deletions(-) delete mode 100644 src/iemlib1/biquad_freq_resp.c (limited to 'src/iemlib1/biquad_freq_resp.c') diff --git a/src/iemlib1/biquad_freq_resp.c b/src/iemlib1/biquad_freq_resp.c deleted file mode 100644 index bc1e99d..0000000 --- a/src/iemlib1/biquad_freq_resp.c +++ /dev/null @@ -1,86 +0,0 @@ -/* For information on usage and redistribution, and for a DISCLAIMER OF ALL -* WARRANTIES, see the file, "LICENSE.txt," in this distribution. - -iemlib1 written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2005 */ - - -#include "m_pd.h" -#include "iemlib.h" -#include - -/* ------------------------ biquad_freq_resp ------------------- */ -/* -- calculates the frequency responce of a biquad structure -- */ - -typedef struct _biquad_freq_resp -{ - t_object x_obj; - t_float a0; - t_float a1; - t_float a2; - t_float b1; - t_float b2; - t_outlet *x_out_re; - t_outlet *x_out_im; -} t_biquad_freq_resp; - -static t_class *biquad_freq_resp_class; - -static void biquad_freq_resp_float(t_biquad_freq_resp *x, t_floatarg f) -{ - t_float re1, im1, re2, im2; - t_float c, s, a; - - if(f < 0.0f) - f = 0.0f; - else if(f > 180.0f) - f = 180.0; - f *= 3.14159265f; - f /= 180.0f; - - c = cos(f); - s = sin(f); - - re1 = x->a0 + x->a1*c + x->a2*(c*c - s*s); - im1 = x->a1*s + x->a2*2.0f*(s*c); - re2 = 1.0f - x->b1*c - x->b2*(c*c - s*s); - im2 = -x->b1*s - x->b2*2.0f*(s*c); - a = re2*re2 + im2*im2; - outlet_float(x->x_out_im, (re1*im2 - re2*im1)/a);/* because z^-1 = e^-jwt, negative sign */ - outlet_float(x->x_out_re, (re1*re2 + im1*im2)/a); - -} -/* y/x = (a0 + a1*z-1 + a2*z-2)/(1 - b1*z-1 - b2*z-2);*/ - -static void biquad_freq_resp_list(t_biquad_freq_resp *x, t_symbol *s, int argc, t_atom *argv) -{ - if((argc == 5)&&IS_A_FLOAT(argv,4)&&IS_A_FLOAT(argv,3)&&IS_A_FLOAT(argv,2)&&IS_A_FLOAT(argv,1)&&IS_A_FLOAT(argv,0)) - { - x->b1 = (float)atom_getfloatarg(0, argc, argv); - x->b2 = (float)atom_getfloatarg(1, argc, argv); - x->a0 = (float)atom_getfloatarg(2, argc, argv); - x->a1 = (float)atom_getfloatarg(3, argc, argv); - x->a2 = (float)atom_getfloatarg(4, argc, argv); - } -} - -static void *biquad_freq_resp_new(void) -{ - t_biquad_freq_resp *x = (t_biquad_freq_resp *)pd_new(biquad_freq_resp_class); - x->x_out_re = outlet_new(&x->x_obj, &s_float); - x->x_out_im = outlet_new(&x->x_obj, &s_float); - x->b1 = 0.0f; - x->b2 = 0.0f; - x->a0 = 0.0f; - x->a1 = 0.0f; - x->a2 = 0.0f; - return (x); -} - -void biquad_freq_resp_setup(void) -{ - biquad_freq_resp_class = class_new(gensym("biquad_freq_resp"), (t_newmethod)biquad_freq_resp_new, 0, - sizeof(t_biquad_freq_resp), 0, 0); - class_addfloat(biquad_freq_resp_class, biquad_freq_resp_float); - class_addlist(biquad_freq_resp_class, (t_method)biquad_freq_resp_list); - class_sethelpsymbol(biquad_freq_resp_class, gensym("iemhelp/help-biquad_freq_resp")); -} -- cgit v1.2.1