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/tabreadmix.c | 273 --------------------------------------------------- 1 file changed, 273 deletions(-) delete mode 100644 modules/tabreadmix.c (limited to 'modules/tabreadmix.c') diff --git a/modules/tabreadmix.c b/modules/tabreadmix.c deleted file mode 100644 index d787f02..0000000 --- a/modules/tabreadmix.c +++ /dev/null @@ -1,273 +0,0 @@ -/* - * tabreadmix.c - an overlap add tabread~ clone - * 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 -#include -#include "extlib_util.h" - -/******************** tabreadmix~ ***********************/ - -static t_class *tabreadmix_tilde_class; - -typedef struct _tabreadmix_tilde -{ - t_object x_obj; - int x_npoints; - float *x_vec; - t_symbol *x_arrayname; - float x_f; - - /* file position vars */ - int x_currpos; - int x_prevpos; - - /* cross fader state vars */ - int x_xfade_size; - int x_xfade_phase; - float x_xfade_cos; - float x_xfade_sin; - float x_xfade_state_c; - float x_xfade_state_s; - -} t_tabreadmix_tilde; - - - -inline void tabreadmix_tilde_wrapindices(t_tabreadmix_tilde *x) -{ - int max; - - /* modulo */ - x->x_currpos %= x->x_npoints; - x->x_prevpos %= x->x_npoints; - - /* make sure 0<=..x_npoints */ - //if (x->x_currpos < 0) x->x_currpos += x->x_npoints; - //if (x->x_prevpos < 0) x->x_prevpos += x->x_npoints; - x->x_currpos += (x->x_currpos < 0) * x->x_npoints; - x->x_prevpos += (x->x_prevpos < 0) * x->x_npoints; - -} - - - -#define min(x,y) ((x)<(y)?(x):(y)) - -static t_int *tabreadmix_tilde_perform(t_int *w) -{ - t_tabreadmix_tilde *x = (t_tabreadmix_tilde *)(w[1]); - t_float *pos = (t_float *)(w[2]); - t_float *out = (t_float *)(w[3]); - int n = (int)(w[4]); - int maxxindex; - float *buf = x->x_vec; - int i; - float currgain, prevgain; - float c,s; - int chunk; - int leftover; - int newpos = (int)*pos; - - maxxindex = x->x_npoints; - if (!buf) goto zero; - if (maxxindex <= 0) goto zero; - - - while (n){ - - /* process as much data as possible */ - leftover = x->x_xfade_size - x->x_xfade_phase; - chunk = min(n, leftover); - - for (i = 0; i < chunk; i++){ - /* compute crossfade gains from oscillator state */ - currgain = 0.5f - x->x_xfade_state_c; - prevgain = 0.5f + x->x_xfade_state_c; - - /* check indices & wrap */ - tabreadmix_tilde_wrapindices(x); - - /* mix and write */ - newpos = (int)(*pos++); - *out++ = currgain * buf[x->x_currpos++] + prevgain * buf[x->x_prevpos++]; - - /* advance oscillator */ - c = x->x_xfade_state_c * x->x_xfade_cos - x->x_xfade_state_s * x->x_xfade_sin; - s = x->x_xfade_state_c * x->x_xfade_sin + x->x_xfade_state_s * x->x_xfade_cos; - x->x_xfade_state_c = c; - x->x_xfade_state_s = s; - } - - /* update indices */ - x->x_xfade_phase += chunk; - n -= chunk; - //pos += chunk; - - /* check if prev chunk is finished */ - if (x->x_xfade_size == x->x_xfade_phase){ - x->x_prevpos = x->x_currpos; - x->x_currpos = newpos; - x->x_xfade_state_c = 0.5f; - x->x_xfade_state_s = 0.0f; - x->x_xfade_phase = 0; - } - - } - - /* return if we ran out of data */ - return (w+5); - - - zero: - while (n--) *out++ = 0; - return (w+5); -} - - -static void tabreadmix_tilde_blocksize(t_tabreadmix_tilde *x, t_float size) -{ - double prev_phase; - int max; - float fmax = (float)x->x_npoints * 0.5f; - - if (size < 1.0) size = 1.0; - - prev_phase = (double)x->x_xfade_phase; - prev_phase *= size; - prev_phase /= (double)x->x_xfade_size; - - - /* preserve the crossfader state */ - x->x_xfade_phase = (int)prev_phase; - x->x_xfade_size = (int)size; - - - x->x_xfade_cos = cos(M_PI / (float)x->x_xfade_size); - x->x_xfade_sin = sin(M_PI / (float)x->x_xfade_size); - - - /* make sure indices are inside array */ - if (x->x_npoints == 0){ - x->x_currpos = 0; - x->x_prevpos = 0; - } - - //else tabreadmix_tilde_wrapindices(x); - - - -} - -void tabreadmix_tilde_pitch(t_tabreadmix_tilde *x, t_float f) -{ - if (f < 1) f = 1; - - tabreadmix_tilde_blocksize(x, sys_getsr() / f); -} - -void tabreadmix_tilde_chunks(t_tabreadmix_tilde *x, t_float f) -{ - if (f < 1.0f) f = 1.0f; - tabreadmix_tilde_blocksize(x, (float)x->x_npoints / f); -} - -void tabreadmix_tilde_bang(t_tabreadmix_tilde *x, t_float f) -{ - //trigger a chunk reset on next dsp call - x->x_xfade_phase = x->x_xfade_size; -} - -void tabreadmix_tilde_set(t_tabreadmix_tilde *x, t_symbol *s) -{ - t_garray *a; - - x->x_arrayname = s; - if (!(a = (t_garray *)pd_findbyclass(x->x_arrayname, garray_class))) - { - if (*s->s_name) - error("tabreadmix~: %s: no such array", x->x_arrayname->s_name); - x->x_vec = 0; - } - else if (!garray_getfloatarray(a, &x->x_npoints, &x->x_vec)) - { - error("%s: bad template for tabreadmix~", x->x_arrayname->s_name); - x->x_vec = 0; - } - else garray_usedindsp(a); - - /* make sure indices are inside array */ - if (x->x_npoints == 0){ - x->x_currpos = 0; - x->x_prevpos = 0; - } - - //else tabreadmix_tilde_wrapindices(x); - -} - -static void tabreadmix_tilde_dsp(t_tabreadmix_tilde *x, t_signal **sp) -{ - tabreadmix_tilde_set(x, x->x_arrayname); - - dsp_add(tabreadmix_tilde_perform, 4, x, - sp[0]->s_vec, sp[1]->s_vec, sp[0]->s_n); - -} - -static void tabreadmix_tilde_free(t_tabreadmix_tilde *x) -{ -} - -static void *tabreadmix_tilde_new(t_symbol *s) -{ - t_tabreadmix_tilde *x = (t_tabreadmix_tilde *)pd_new(tabreadmix_tilde_class); - x->x_arrayname = s; - x->x_vec = 0; - inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("float"), gensym("blocksize")); - outlet_new(&x->x_obj, gensym("signal")); - x->x_f = 0; - x->x_xfade_phase = 0; - x->x_xfade_size = 1024; - x->x_currpos = 0; - x->x_prevpos = 0; - x->x_xfade_state_c = 0.5f; - x->x_xfade_state_s = 0.0f; - tabreadmix_tilde_blocksize(x, 1024); - return (x); -} - -void tabreadmix_tilde_setup(void) -{ - tabreadmix_tilde_class = class_new(gensym("tabreadmix~"), - (t_newmethod)tabreadmix_tilde_new, (t_method)tabreadmix_tilde_free, - sizeof(t_tabreadmix_tilde), 0, A_DEFSYM, 0); - CLASS_MAINSIGNALIN(tabreadmix_tilde_class, t_tabreadmix_tilde, x_f); - class_addmethod(tabreadmix_tilde_class, (t_method)tabreadmix_tilde_dsp, - gensym("dsp"), 0); - class_addmethod(tabreadmix_tilde_class, (t_method)tabreadmix_tilde_set, - gensym("set"), A_SYMBOL, 0); - class_addmethod(tabreadmix_tilde_class, (t_method)tabreadmix_tilde_blocksize, - gensym("blocksize"), A_FLOAT, 0); - class_addmethod(tabreadmix_tilde_class, (t_method)tabreadmix_tilde_pitch, - gensym("pitch"), A_FLOAT, 0); - class_addmethod(tabreadmix_tilde_class, (t_method)tabreadmix_tilde_chunks, - gensym("chunks"), A_FLOAT, 0); - class_addmethod(tabreadmix_tilde_class, (t_method)tabreadmix_tilde_bang, - gensym("bang"), 0); -} -- cgit v1.2.1