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/*
* iemmatrix
*
* objects for manipulating simple matrices
* mostly refering to matlab/octave matrix functions
*
* Copyright (c) 2005, Franz Zotter
* IEM, Graz, Austria
*
* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
*
*/
#include "iemmatrix.h"
#include <stdlib.h>
static t_class *mtx_rowrifft_class;
typedef struct _MTXRowrifft_
{
t_object x_obj;
int rows;
int columns;
int columns_re;
int size;
int size2;
t_float renorm_fac;
t_float *f_re;
t_float *f_im;
t_outlet *list_re_out;
t_outlet *list_im_out;
t_atom *list_re;
t_atom *list_im;
} MTXRowrifft;
/* helper functions: these should really go into a separate file! */
static void zeroFloatArray (int n, t_float *f)
{
while (n--)
*f++ = 0.0f;
}
static void writeFloatIntoList (int n, t_atom *l, t_float *f)
{
for (;n--;f++, l++)
SETFLOAT (l, *f);
}
static void readFloatFromList (int n, t_atom *l, t_float *f)
{
while (n--)
*f++ = atom_getfloat (l++);
}
/*--------------inverse real fft */
static void multiplyVector (int n, t_float *f, t_float fac)
{
while (n--)
*f++ *= fac;
}
static void ifftPrepareReal (int n, t_float *re, t_float *im)
{
n >>= 1;
re += n;
im += n;
while (--n)
*++re = -*--im;
}
static void *newMTXRowrifft (t_symbol *s, int argc, t_atom *argv)
{
MTXRowrifft *x = (MTXRowrifft *) pd_new (mtx_rowrifft_class);
inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("matrix"),gensym(""));
x->list_re_out = outlet_new (&x->x_obj, gensym("matrix"));
return ((void *) x);
}
static void mTXrowrifftMatrixCold (MTXRowrifft *x, t_symbol *s,
int argc, t_atom *argv)
{
int rows = atom_getint (argv++);
int columns_re = atom_getint (argv++);
int in_size = argc-2;
int columns = (columns_re-1)<<1;
int size2 = columns_re * rows;
int size = rows * columns;
int ifft_count;
t_atom *list_re = x->list_re;
t_float *f_re = x->f_re;
t_float *f_im = x->f_im;
/* ifftsize check */
if (columns_re < 3)
post("mtx_rowrifft: matrix must have at least 3 columns");
else if (!size)
post("mtx_rowrifft: invalid dimensions");
else if (in_size < size2)
post("mtx_rowrifft: sparse matrix not yet supported: use \"mtx_check\"");
else if (columns<4)
post("mtx_rowrifft: too small matrices");
else if (columns == (1 << ilog2(columns))) {
/* memory things */
f_re=(t_float*)realloc(f_re, sizeof(t_float)*size);
f_im=(t_float*)realloc(f_im, sizeof(t_float)*size);
list_re=(t_atom*)realloc(list_re, sizeof(t_atom)*(size+2));
x->size = size;
x->size2 = size2;
x->rows = rows;
x->columns = columns;
x->columns_re = columns_re;
x->list_re = list_re;
x->f_re = f_re;
x->f_im = f_im;
/* main part: reading imaginary part */
ifft_count = rows;
x->renorm_fac = 1.0f / columns;
while (ifft_count--) {
readFloatFromList (columns_re, argv, f_im);
argv += columns_re;
f_im += columns;
}
/* do nothing else! */
}
else
post("mtx_rowrifft: rowvector 2*(size+1) no power of 2!");
}
static void mTXrowrifftMatrixHot (MTXRowrifft *x, t_symbol *s,
int argc, t_atom *argv)
{
int rows = atom_getint (argv++);
int columns_re = atom_getint (argv++);
int columns = x->columns;
int size = x->size;
int in_size = argc-2;
int size2 = x->size2;
int ifft_count;
t_atom *ptr_re = x->list_re;
t_float *f_re = x->f_re;
t_float *f_im = x->f_im;
t_float renorm_fac = x->renorm_fac;
/* ifftsize check */
if ((rows != x->rows) ||
(columns_re != x->columns_re))
post("mtx_rowrifft: matrix dimensions do not match");
else if (in_size<size2)
post("mtx_rowrifft: sparse matrix not yet supported: use \"mtx_check\"");
else if (!x->size2)
post("mtx_rowrifft: invalid right side matrix");
else { /* main part */
ifft_count = rows;
ptr_re += 2;
while (ifft_count--){
readFloatFromList (columns_re, argv, f_re);
ifftPrepareReal (columns, f_re, f_im);
mayer_realifft (columns, f_re);
multiplyVector (columns, f_re, renorm_fac);
f_im += columns;
f_re += columns;
ptr_re += columns;
argv += columns_re;
}
ptr_re = x->list_re;
f_re = x->f_re;
size2 = x->size2;
SETSYMBOL(ptr_re, gensym("matrix"));
SETFLOAT(ptr_re, rows);
SETFLOAT(&ptr_re[1], x->columns);
writeFloatIntoList (size, ptr_re+2, f_re);
outlet_anything(x->list_re_out, gensym("matrix"), size+2, ptr_re);
}
}
static void mTXrowrifftBang (MTXRowrifft *x)
{
if (x->list_re)
outlet_anything(x->list_re_out, gensym("matrix"),
x->size+2, x->list_re);
}
static void deleteMTXRowrifft (MTXRowrifft *x)
{
if (x->f_re)
free(x->f_re);
if (x->f_im)
free(x->f_im);
if (x->list_re)
free(x->list_re);
if (x->list_im)
free(x->list_im);
}
static void mtx_rowrifft_setup (void)
{
mtx_rowrifft_class = class_new
(gensym("mtx_rowrifft"),
(t_newmethod) newMTXRowrifft,
(t_method) deleteMTXRowrifft,
sizeof (MTXRowrifft),
CLASS_DEFAULT, A_GIMME, 0);
class_addbang (mtx_rowrifft_class, (t_method) mTXrowrifftBang);
class_addmethod (mtx_rowrifft_class, (t_method) mTXrowrifftMatrixHot, gensym("matrix"), A_GIMME,0);
class_addmethod (mtx_rowrifft_class, (t_method) mTXrowrifftMatrixCold, gensym(""), A_GIMME,0);
}
void iemtx_rowrifft_setup(void){
mtx_rowrifft_setup();
}
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