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/*
* matrix.c - applies a matrix transform to a signal block
* intended for spectral processing, dynwav
*
* 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAXORDER 1024
typedef struct matrixctl
{
t_float *c_A; /* matrix */
t_float *c_x; /* vector */
int c_order;
} t_matrixctl;
typedef struct matrix
{
t_object x_obj;
t_float x_f;
t_matrixctl x_ctl;
} t_matrix;
static void matrix_load(t_matrix *x, t_symbol *s)
{
FILE *matrix;
if(s && s->s_name)
{
post("matrix: loading %s",s->s_name);
if(matrix = fopen(s->s_name, "r"))
{
int n = x->x_ctl.c_order;
fread(x->x_ctl.c_A, sizeof(float), n*n, matrix);
}
else post("matrix: error, cant open file.");
}
}
static t_int *matrix_perform(t_int *w)
{
t_float *in = (float *)(w[3]);
t_float *out = (float *)(w[4]);
t_matrixctl *ctl = (t_matrixctl *)(w[1]);
int n = (int)(w[2]);
int i,j;
t_float *A = ctl->c_A;
t_float *x = ctl->c_x;
if (in == out) /* store input if ness. */
{
memcpy(x, in, sizeof(t_float)*n);
in = x;
}
bzero(out, sizeof(t_float)*n); /* init output */
for (j=0; j<n; j++)
for (i=0; i<n; i++)
out[i] += A[i+j*n] * in[j];
return (w+5);
}
static void matrix_dsp(t_matrix *x, t_signal **sp)
{
int n = sp[0]->s_n;
int k,i;
if (x->x_ctl.c_order != n)
{
if (x->x_ctl.c_A) free (x->x_ctl.c_A);
x->x_ctl.c_A = (t_float *)calloc(n*n,sizeof(t_float));
x->x_ctl.c_x = (t_float *)calloc(n,sizeof(t_float));
x->x_ctl.c_order = n;
}
for (i=0;i<n;i++) x->x_ctl.c_A[i] = 1;
dsp_add(matrix_perform, 4, &x->x_ctl, sp[0]->s_n, sp[0]->s_vec, sp[1]->s_vec);
}
static void matrix_free(t_matrix *x)
{
if (x->x_ctl.c_A) free (x->x_ctl.c_A);
if (x->x_ctl.c_x) free (x->x_ctl.c_x);
}
t_class *matrix_class;
static void *matrix_new(t_floatarg order)
{
t_matrix *x = (t_matrix *)pd_new(matrix_class);
int iorder = (int)order;
int i, n=64, k;
/* out 1 */
outlet_new(&x->x_obj, gensym("signal"));
/* init data */
x->x_ctl.c_A = (t_float *)calloc(n*n,sizeof(t_float));
x->x_ctl.c_x = (t_float *)calloc(n,sizeof(t_float));
for (i=0;i<n;i++) x->x_ctl.c_A[i] = 1;
x->x_ctl.c_order = n;
return (void *)x;
}
void bmatrix_tilde_setup(void)
{
//post("matrix~ v0.1");
matrix_class = class_new(gensym("bmatrix~"), (t_newmethod)matrix_new,
(t_method)matrix_free, sizeof(t_matrix), 0, A_DEFFLOAT, 0);
CLASS_MAINSIGNALIN(matrix_class, t_matrix, x_f);
class_addmethod(matrix_class, (t_method)matrix_dsp, gensym("dsp"), 0);
class_addmethod(matrix_class, (t_method)matrix_load, gensym("load"), A_SYMBOL,0);
}
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