From df828adc5de7b218b8aaaefcbeb77b8e263e8564 Mon Sep 17 00:00:00 2001 From: Georg Holzmann Date: Fri, 12 Jan 2007 23:53:15 +0000 Subject: ekext now in libdir format svn path=/trunk/; revision=7325 --- externals/build/src/lpreson~.c | 131 ----------------------------------------- 1 file changed, 131 deletions(-) delete mode 100644 externals/build/src/lpreson~.c (limited to 'externals/build/src/lpreson~.c') diff --git a/externals/build/src/lpreson~.c b/externals/build/src/lpreson~.c deleted file mode 100644 index c89a8e56..00000000 --- a/externals/build/src/lpreson~.c +++ /dev/null @@ -1,131 +0,0 @@ -/* Lattice IIR filter from PARCOR coefficients - * Copyright (C) 2005 Nicolas Chetry - * and Edward Kelly - * - * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include "m_pd.h" - -static t_class *lpreson_tilde_class; - -typedef struct _lpreson_control -{ - t_float *c_residual, *c_output; - t_atom *x_parcors; - /* t_atom x_parc_interp_one[MAXPOLES]; - t_int x_parc_ord_one; - t_atom x_parc_interp_two[MAXPOLES]; - t_int x_parc_ord_two; */ -} t_lpreson_control; - -typedef struct _lpreson_tilde -{ - t_object x_obj; - t_float f_dummy; - t_int x_order; - t_lpreson_control x_ctl; -} t_lpreson_tilde; - -t_int *lpreson_tilde_perform(t_int *w) -{ - t_object x_obj; - t_lpreson_tilde *x = (t_lpreson_tilde *)(w[1]); - t_lpreson_control *ctl = (t_lpreson_control *)(w[2]); - int n = (int)(w[3]); - t_float *in = ctl->c_residual; - t_float *out = ctl->c_output; - t_int ord = x->x_order; - float mem[ord+1]; -/* - * Do the inverse filtering - * - * 'data_in' : residual signal (length 'len') - * 'data_out' : output frame (length 'len') - * 'coeff' : the parcor coefficients (length 'tap') - * 'lattice_iir' : filter memory - Previously initialised using init_lattice_iir_filter() - * - */ - int k, i; - float sri; - - for (i=0;i<=ord;i++) - { - // SETFLOAT (&schur->x_parcors[i],0); - mem[i] = 0.0; - } - - for (k = 0; k < n; k++ ) - { - /* Synthesis filter - Lattice structure */ - sri = in[k]; - for (i=0; ix_parcors); - sri = sri - parcor * mem[ord-1-i]; - mem[ord-i] = mem[ord-1-i] + parcor*sri; - } - out[k] = sri; - mem[0] = sri; - - } /* next k */ - return(w+4); -} - -static void lpreson_tilde_list(t_lpreson_tilde *x, t_symbol *s, int argc, t_atom *argv) -{ - if (argc) - { - // x->x_ctl.parc_interp_two = copybytes(x->x_ctl.parc_interp_one, x->x_ctl.parc_ord_one * sizeof(t_atom)); - // x->x_ctl.parc_ord_two = x->x_ctl.parc_ord_one; - // x->x_ctl.parc_interp_one = copybytes(x->x_ctl.parcors, x->x_order * sizeof(t_atom)); - // x->x_ctl.parc_ord_one = x->x_order; - freebytes(x->x_ctl.x_parcors, x->x_order * sizeof(t_atom)); - } - - x->x_ctl.x_parcors = copybytes(argv, argc * sizeof(t_atom)); - x->x_order = argc; -} - -void *lpreson_tilde_dsp(t_lpreson_tilde *x, t_signal **sp) -{ - x->x_ctl.c_residual = sp[0]->s_vec; - x->x_ctl.c_output = sp[1]->s_vec; - dsp_add(lpreson_tilde_perform, 3, x, &x->x_ctl, sp[0]->s_n); - return (void *)x; -} - -void *lpreson_tilde_new(t_floatarg f) -{ - t_lpreson_tilde *x = (t_lpreson_tilde *)pd_new(lpreson_tilde_class); - x->x_order = f >= 1 ? (int)f : 5; - - outlet_new(&x->x_obj, &s_signal); - return (void *)x; -} - -void lpreson_tilde_setup(void) -{ - lpreson_tilde_class = class_new(gensym("lpreson~"), (t_newmethod)lpreson_tilde_new, 0, sizeof(t_lpreson_tilde), CLASS_DEFAULT, A_DEFFLOAT, 0); - - post(". . Lattice IIR filter for lpc. . . . . . ."); - post(". . by Nicolas Chetry . ."); - post(". & Edward Kelly ."); - - class_addmethod(lpreson_tilde_class, (t_method)lpreson_tilde_dsp, gensym("dsp"), 0); -// class_sethelpsymbol(lpreson_tilde_class, gensym("help-lpc~")); - class_addlist(lpreson_tilde_class, lpreson_tilde_list); - class_sethelpsymbol(lpreson_tilde_class, gensym("lpc-cross-synthesis.pd")); - CLASS_MAINSIGNALIN(lpreson_tilde_class, t_lpreson_tilde, f_dummy); -} -- cgit v1.2.1