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/* ------------------------ randomblock~ -------------------------------------- */
/* */
/* Generates a random signal block */
/* Written by Yves Degoyon (ydegoyon@free.fr). */
/* */
/* 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. */
/* */
/* See file LICENSE for further informations on licensing terms. */
/* */
/* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* */
/* Based on PureData by Miller Puckette and others. */
/* */
/* ---------------------------------------------------------------------------- */
#include <sys/types.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/stat.h>
#ifndef __APPLE__
#include <malloc.h>
#endif
#include <ctype.h>
#include <unistd.h>
#include <time.h>
#include <sys/time.h>
#include "m_pd.h" /* standard pd stuff */
static char *randomblock_version = "randomblock~: generates a random audio block : author : ydegoyon@free.fr";
static t_class *randomblock_class;
typedef struct _randomblock
{
t_object x_obj;
t_int x_limit;
} t_randomblock;
/* clean up */
static void randomblock_free(t_randomblock *x)
{
}
static void *randomblock_new(t_float flimit)
{
t_randomblock *x = (t_randomblock *)pd_new(randomblock_class);
outlet_new(&x->x_obj, &s_signal);
inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("limit"));
if ( flimit <= 0 || flimit > RAND_MAX ) {
post( "randomblock~: wrong creation argument" );
return NULL;
}
x->x_limit = (int) flimit;
return(x);
}
static void *randomblock_limit(t_randomblock* x, t_float flimit)
{
if ( flimit < 0 || flimit > RAND_MAX ) {
post( "randomblock~: wrong random limit" );
return;
} else {
x->x_limit=(int)flimit;
}
}
static t_int *randomblock_perform(t_int *w)
{
t_float *out = (t_float*) w[1];
int n = (int)(w[2]);
t_randomblock *x = (t_randomblock*) w[3];
int rvalue = rand();
// post("random value : %d", rvalue );
rvalue = rvalue%(x->x_limit-n);
// post("modulated by %d : %d", (x->x_limit-n), rvalue );
if ( rvalue < 0 ) rvalue=0;
while (n--) {
*(out)++=(float)rvalue++;
}
return (w+4);
}
static void randomblock_dsp(t_randomblock *x, t_signal **sp)
{
dsp_add( randomblock_perform, 3, sp[0]->s_vec, sp[0]->s_n, x ) ;
}
void randomblock_tilde_setup(void)
{
post(randomblock_version);
randomblock_class = class_new(gensym("randomblock~"), (t_newmethod)randomblock_new,
(t_method)randomblock_free,
sizeof(t_randomblock), 0, A_DEFFLOAT, 0);
class_addmethod( randomblock_class, (t_method)randomblock_dsp, gensym("dsp"), 0);
class_addmethod( randomblock_class, (t_method)randomblock_limit, gensym("limit"), A_FLOAT, 0);
}
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