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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"
static t_class *mtx_diff_class;
typedef struct _MTXdiff_ MTXdiff;
struct _MTXdiff_
{
t_object x_obj;
int rows;
int columns;
int size;
int diff_dimension;
int diff_direction;
t_outlet *list_outlet;
t_atom *list_out;
t_atom *list_in;
t_float *x;
t_float *y;
};
static void deleteMTXdiff (MTXdiff *mtx_diff_obj)
{
if (mtx_diff_obj->list_out)
freebytes (mtx_diff_obj->list_out, sizeof(t_atom)*(mtx_diff_obj->size+2));
if (mtx_diff_obj->x)
freebytes (mtx_diff_obj->x, sizeof(t_float)*(mtx_diff_obj->size));
if (mtx_diff_obj->y)
freebytes (mtx_diff_obj->y, sizeof(t_float)*(mtx_diff_obj->size));
}
static void mTXSetdiffDirection (MTXdiff *mtx_diff_obj, t_float c_dir)
{
int direction = (int) c_dir;
mtx_diff_obj->diff_direction = (direction==-1)?direction:1;
}
static void mTXSetdiffDimension (MTXdiff *mtx_diff_obj, t_float c_dim)
{
int dimension = (int) c_dim;
mtx_diff_obj->diff_dimension = (dimension==2)?dimension:1;
}
static void *newMTXdiff (t_symbol *s, int argc, t_atom *argv)
{
MTXdiff *mtx_diff_obj = (MTXdiff *) pd_new (mtx_diff_class);
int c_dir = 1;
int c_dim = 1;
mtx_diff_obj->diff_dimension = c_dim;
switch ((argc>2)?2:argc) {
case 2:
c_dir = atom_getint(argv+1);
case 1:
c_dim = atom_getint(argv);
}
mTXSetdiffDirection (mtx_diff_obj, (t_float) c_dir);
mTXSetdiffDimension (mtx_diff_obj, (t_float) c_dim);
mtx_diff_obj->list_outlet = outlet_new (&mtx_diff_obj->x_obj, gensym("matrix"));
return ((void *) mtx_diff_obj);
}
static void mTXdiffBang (MTXdiff *mtx_diff_obj)
{
if (mtx_diff_obj->list_out)
outlet_anything(mtx_diff_obj->list_outlet, gensym("matrix"),
mtx_diff_obj->size+2, mtx_diff_obj->list_out);
}
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 readFloatFromListModulo (int n, int m, t_atom *l, t_float *f)
{
t_atom *ptr = l;
int count1, count2;
n /= m;
count1 = m;
while (count1--)
for (count2 = n, ptr = l++; count2--; ptr += m, f++)
*f = atom_getfloat (ptr);
}
static void writeFloatIntoListModulo (int n, int m, t_atom *l, t_float *f)
{
t_atom *ptr = l;
int count1, count2;
n /= m;
count1 = m;
while (count1--)
for (count2 = n, ptr = l++; count2--; ptr += m, f++)
SETFLOAT(ptr,*f);
}
static void diff (int n, t_float *x, t_float *y)
{
*y++ = *x++;
for (;--n; x++, y++)
*y = *x - *(x-1);
}
static void diffReverse (int n, t_float *x, t_float *y)
{
*y-- = *x--;
for (;--n; x--, y--)
*y = *x - *(x+1);
}
static void mTXdiffMatrix (MTXdiff *mtx_diff_obj, t_symbol *s,
int argc, t_atom *argv)
{
int rows = atom_getint (argv++);
int columns = atom_getint (argv++);
int size = rows * columns;
int list_size = argc - 2;
t_atom *list_ptr = argv;
t_atom *list_out = mtx_diff_obj->list_out;
t_float *x = mtx_diff_obj->x;
t_float *y = mtx_diff_obj->y;
int count;
// size check
if (!size) {
post("mtx_diff: invalid dimensions");
return;
}
else if (list_size<size) {
post("mtx_diff: sparse matrix not yet supported: use \"mtx_check\"");
return;
}
else if ((!x)||(!list_out)||(!y)) {
if (!x)
x = (t_float *) getbytes (sizeof (t_float) * (size));
if (!y)
y = (t_float *) getbytes (sizeof (t_float) * (size));
if (!list_out)
list_out = (t_atom *) getbytes (sizeof (t_atom) * (size+2));
}
else if (size != mtx_diff_obj->size) {
x = (t_float *) resizebytes (x,
sizeof (t_float) * (mtx_diff_obj->size),
sizeof (t_float) * (size));
y = (t_float *) resizebytes (y,
sizeof (t_float) * (mtx_diff_obj->size),
sizeof (t_float) * (size));
list_out = (t_atom *) resizebytes (list_out,
sizeof (t_atom) * (mtx_diff_obj->size+2),
sizeof (t_atom) * (size + 2));
}
mtx_diff_obj->size = size;
mtx_diff_obj->rows = rows;
mtx_diff_obj->columns = columns;
mtx_diff_obj->list_out = list_out;
mtx_diff_obj->x = x;
mtx_diff_obj->y = y;
// main part
// reading matrix from inlet
if (mtx_diff_obj->diff_dimension == 2) {
readFloatFromListModulo (size, columns, list_ptr, x);
columns = mtx_diff_obj->rows;
rows = mtx_diff_obj->columns;
}
else
readFloatFromList (size, list_ptr, x);
// calculating diff
if (mtx_diff_obj->diff_direction == -1) {
x += columns-1;
y += columns-1;
for (count = rows; count--; x += columns, y += columns)
diffReverse (columns,x,y);
}
else
for (count = rows; count--; x += columns, y += columns)
diff (columns,x,y);
x = mtx_diff_obj->x;
y = mtx_diff_obj->y;
// writing matrix to outlet
if (mtx_diff_obj->diff_dimension == 2) {
columns = mtx_diff_obj->columns;
rows = mtx_diff_obj->rows;
writeFloatIntoListModulo (size, columns, list_out+2, y);
}
else
writeFloatIntoList (size, list_out+2, y);
SETSYMBOL(list_out, gensym("matrix"));
SETFLOAT(list_out, rows);
SETFLOAT(&list_out[1], columns);
outlet_anything(mtx_diff_obj->list_outlet, gensym("matrix"),
mtx_diff_obj->size+2, list_out);
}
void mtx_diff_setup (void)
{
mtx_diff_class = class_new
(gensym("mtx_diff"),
(t_newmethod) newMTXdiff,
(t_method) deleteMTXdiff,
sizeof (MTXdiff),
CLASS_DEFAULT, A_GIMME, 0);
class_addbang (mtx_diff_class, (t_method) mTXdiffBang);
class_addmethod (mtx_diff_class, (t_method) mTXdiffMatrix, gensym("matrix"), A_GIMME,0);
class_addmethod (mtx_diff_class, (t_method) mTXSetdiffDimension, gensym("dimension"), A_DEFFLOAT,0);
class_addmethod (mtx_diff_class, (t_method) mTXSetdiffDirection, gensym("direction"), A_DEFFLOAT,0);
class_sethelpsymbol (mtx_diff_class, gensym("iemmatrix/mtx_diff"));
}
void iemtx_diff_setup(void){
mtx_diff_setup();
}
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