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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_rowrfft_class;
typedef struct _MTXRowrfft_ MTXRowrfft;
struct _MTXRowrfft_
{
t_object x_obj;
int size;
int size2;
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;
};
static void deleteMTXRowrfft (MTXRowrfft *x)
{
free (x->f_re);
free (x->f_im);
free (x->list_re);
free (x->list_im);
}
static void *newMTXRowrfft (t_symbol *s, int argc, t_atom *argv)
{
MTXRowrfft *x = (MTXRowrfft *) pd_new (mtx_rowrfft_class);
x->list_re_out = outlet_new (&x->x_obj, gensym("matrix"));
x->list_im_out = outlet_new (&x->x_obj, gensym("matrix"));
x->size=x->size2=0;
x->f_re=x->f_im=0;
x->list_re=x->list_im=0;
return ((void *) x);
}
static void mTXrowrfftBang (MTXRowrfft *x)
{
if (x->list_im) {
outlet_anything(x->list_im_out, gensym("matrix"), x->size2, x->list_im);
outlet_anything(x->list_re_out, gensym("matrix"), x->size2, x->list_re);
}
}
static void fftRestoreImag (int n, t_float *re, t_float *im)
{
t_float *im2;
n >>= 1;
*im=0;
re += n;
im += n;
im2 = im;
*im=0;
while (--n) {
*--im = -*++re;
*++im2 = 0;
*re = 0;
}
}
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++);
}
static void mTXrowrfftMatrix (MTXRowrfft *x, t_symbol *s,
int argc, t_atom *argv)
{
//mTXrowrfftList (x, s, argc-2, argv+2);
int rows = atom_getint (argv++);
int columns = atom_getint (argv++);
int columns_re = (columns>>1)+1; /* N/2+1 samples needed for real part of realfft */
int size = rows * columns;
int in_size = argc-2;
int size2 = columns_re * rows + 2; /* +2 since the list also contains matrix row+col */
int fft_count;
t_atom *list_re = x->list_re;
t_atom *list_im = x->list_im;
t_float *f_re = x->f_re;
t_float *f_im = x->f_im;
// fftsize check
if (!size)
post("mtx_rowrfft: invalid dimensions");
else if (in_size<size)
post("mtx_rowrfft: sparse matrix not yet supported: use \"mtx_check\"");
else if (columns < 4){
post("mtx_rowrfft: matrix must have at least 4 columns");
}
else if (columns == (1 << ilog2(columns))) {
/* ok, do the FFT! */
// 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)*size2);
list_im=(t_atom*)realloc(list_im, sizeof(t_atom)*size2);
x->size = size;
x->size2 = size2;
x->list_im = list_im;
x->list_re = list_re;
x->f_re = f_re;
x->f_im = f_im;
// main part
readFloatFromList (size, argv, f_re);
fft_count = rows;
list_re += 2;
list_im += 2;
while (fft_count--){
mayer_realfft (columns, f_re);
fftRestoreImag (columns, f_re, f_im);
writeFloatIntoList (columns_re, list_re, f_re);
writeFloatIntoList (columns_re, list_im, f_im);
f_im += columns;
f_re += columns;
list_re += columns_re;
list_im += columns_re;
}
list_re = x->list_re;
list_im = x->list_im;
SETSYMBOL(list_re, gensym("matrix"));
SETSYMBOL(list_im, gensym("matrix"));
SETFLOAT(list_re, rows);
SETFLOAT(list_im, rows);
SETFLOAT(list_re+1, columns_re);
SETFLOAT(list_im+1, columns_re);
outlet_anything(x->list_im_out, gensym("matrix"),
x->size2, list_im);
outlet_anything(x->list_re_out, gensym("matrix"),
x->size2, list_re);
}
else
post("mtx_rowfft: rowvector size no power of 2!");
}
void mtx_rowrfft_setup (void)
{
mtx_rowrfft_class = class_new
(gensym("mtx_rowrfft"),
(t_newmethod) newMTXRowrfft,
(t_method) deleteMTXRowrfft,
sizeof (MTXRowrfft),
CLASS_DEFAULT, A_GIMME, 0);
class_addbang (mtx_rowrfft_class, (t_method) mTXrowrfftBang);
class_addmethod (mtx_rowrfft_class, (t_method) mTXrowrfftMatrix, gensym("matrix"), A_GIMME,0);
class_sethelpsymbol (mtx_rowrfft_class, gensym("iemmatrix/mtx_rowrfft"));
}
void iemtx_rowrfft_setup(void){
mtx_rowrfft_setup();
}
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