From d962ed33f6b5fe3040cfbd798f63ab9aa36d1f9e Mon Sep 17 00:00:00 2001 From: Hans-Christoph Steiner Date: Thu, 25 May 2006 16:40:19 +0000 Subject: renamed files to match their class names svn path=/trunk/externals/creb/; revision=5127 --- modules/window.c | 168 ------------------------------------------------------- 1 file changed, 168 deletions(-) delete mode 100644 modules/window.c (limited to 'modules/window.c') diff --git a/modules/window.c b/modules/window.c deleted file mode 100644 index 777c8c5..0000000 --- a/modules/window.c +++ /dev/null @@ -1,168 +0,0 @@ -/* - * window.c - window generation abstraction - * 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 - - -static t_class *window_class; - -typedef struct _window -{ - t_object x_obj; - t_float x_f; - t_float *x_window; - t_int x_size; - t_symbol *x_type; - t_float x_typearg; - -} t_window; - -static t_int *window_perform(t_int *w) -{ - t_window *x = (t_window *)(w[1]); - t_float *in = (t_float *)(w[2]); - t_float *out = (t_float *)(w[3]); - t_float *window = x->x_window; - int n = (int)(w[4]); - while (n--) - { - *out++ = (*in++) * (*window++); - } - return (w+5); -} - -static void window_size(t_window *x, t_int n) -{ - if (x->x_size != n){ - if (x->x_window) free(x->x_window); - x->x_window = malloc(sizeof(float)*n); - x->x_size = n; - } -} - - -static void window_type(t_window *x, t_symbol *s, t_float f) -{ - int i; - float a = 0; - float a_inc = 2 * M_PI / (float)(x->x_size); - if (!s) s = gensym("hamming"); - if (s == gensym("hamming")){ - for (i=0; ix_size; i++){ - float c = cos(a); - x->x_window[i] = (0.54 - 0.46 * c); - a += a_inc; - } - } - else if (s == gensym("hann")){ - for (i=0; ix_size; i++){ - float c = cos(a); - x->x_window[i] = (0.5 - 0.5 * c); - a += a_inc; - } - } - else if (s == gensym("hann/hamming")){ - for (i=0; ix_size; i++) { - float c = cos(a); - x->x_window[i] = (0.5 - 0.5 * c) / (0.54 - 0.46 * c); - a += a_inc; - } - } - else if (s == gensym("bfft_pink")){ - x->x_window[0] = 1.0f; //DC - x->x_window[1] = 1.0f / sqrt((double)(x->x_size>>1)); //NY - for (i=2; ix_size; i+=2) { - double freq = (double)(i>>1); - float amp = sqrt(1.0 / freq); - x->x_window[i] = amp; - x->x_window[i+1] = amp; - } - } - else if (s == gensym("bfft_blue")){ - x->x_window[0] = 1.0f; //DC - x->x_window[1] = sqrt((double)(x->x_size>>1)); //NY - for (i=2; ix_size; i+=2) { - double freq = (double)(i>>1); - float amp = sqrt(freq); - x->x_window[i] = amp; - x->x_window[i+1] = amp; - } - } - else if (s == gensym("bfft_db/octave")){ - float power = f/6.0; - x->x_window[0] = 1.0f; //DC - x->x_window[1] = pow((double)(x->x_size>>1), power); //NY - for (i=2; ix_size; i+=2) { - double freq = (double)(i>>1); - float amp = pow(freq, power); - x->x_window[i] = amp; - x->x_window[i+1] = amp; - } - } - - - /* default is no window */ - else{ - post("bwin~: unknown window type, using rectangular"); - for (i=0; ix_size; i++) x->x_window[i] = 1.0f; - } - - x->x_type = s; - x->x_typearg = f; - -} - -static void window_dsp(t_window *x, t_signal **sp) -{ - int n = sp[0]->s_n; - if (x->x_size != n){ - window_size(x, n); - window_type(x, x->x_type, x->x_typearg); - } - - dsp_add(window_perform, 4, x, sp[0]->s_vec, sp[1]->s_vec, n); -} - -static void window_free(t_window *x) -{ - free(x->x_window); -} - - -static void *window_new(t_symbol *s) -{ - t_window *x = (t_window *)pd_new(window_class); - outlet_new(&x->x_obj, &s_signal); - x->x_window = 0; - window_size(x, 64); - window_type(x, s, 0); - return (x); -} - -void window_tilde_setup(void) -{ - window_class = class_new(gensym("bwin~"), (t_newmethod)window_new, (t_method)window_free, - sizeof(t_window), 0, A_DEFSYMBOL, A_NULL); - CLASS_MAINSIGNALIN(window_class, t_window, x_f); - class_addmethod(window_class, (t_method)window_dsp, gensym("dsp"), A_NULL); - class_addmethod(window_class, (t_method)window_type, gensym("type"), A_SYMBOL, A_DEFFLOAT, A_NULL); -} - -- cgit v1.2.1