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authorHans-Christoph Steiner <eighthave@users.sourceforge.net>2006-05-25 16:40:19 +0000
committerHans-Christoph Steiner <eighthave@users.sourceforge.net>2006-05-25 16:40:19 +0000
commitd962ed33f6b5fe3040cfbd798f63ab9aa36d1f9e (patch)
treef700234efa8d57c28ce9be56e0db5f6526921fbe /modules/tabreadmix.c
parent2994949cca515f63fb82fa1d114ce07eb213220d (diff)
renamed files to match their class names
svn path=/trunk/externals/creb/; revision=5127
Diffstat (limited to 'modules/tabreadmix.c')
-rw-r--r--modules/tabreadmix.c273
1 files changed, 0 insertions, 273 deletions
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 <m_pd.h>
-#include <math.h>
-#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->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);
-}