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/* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
iemlib1 written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2010 */
#include "m_pd.h"
#include "iemlib.h"
/* ---------- sparse_FIR~ - sparse_FIR-filter with coef-matrix-message ----------- */
/* the list or matrix message should have an index and its value, index , value, aso.... */
typedef struct _sparse_FIR_tilde
{
t_object x_obj;
t_float *x_coef_beg;
int *x_index_beg;
int x_n_coef;
int x_n_coef_malloc;
t_float *x_history_beg;
int x_rw_index;
int x_sparse_FIR_order;
t_float x_msi;
} t_sparse_FIR_tilde;
static t_class *sparse_FIR_tilde_class;
static t_int *sparse_FIR_tilde_perform(t_int *w)
{
t_float *in = (t_float *)(w[1]);
t_float *out = (t_float *)(w[2]);
t_sparse_FIR_tilde *x = (t_sparse_FIR_tilde *)(w[3]);
int n = (t_int)(w[4]);
int rw_index = x->x_rw_index;
int i, j, ix;
int order = x->x_sparse_FIR_order;
int n_coef = x->x_n_coef;
int n_coef8;
t_float sum=0.0f;
t_float *coef = x->x_coef_beg;
int *index = x->x_index_beg;
t_float *write_hist1=x->x_history_beg;
t_float *write_hist2;
t_float *read_hist;
t_float *coef_vec;
int *index_vec;
t_float *hist_vec;
if((order < 1) || (n_coef < 1))
goto sparse_FIR_tilde_perf_zero;
n_coef8 = n_coef / 8;
write_hist1 = x->x_history_beg;
write_hist2 = write_hist1 + order;
read_hist = write_hist2;
for(i=0; i<n; i++)
{
write_hist1[rw_index] = in[i];
write_hist2[rw_index] = in[i];
sum = 0.0f;
coef_vec = coef;
index_vec = index;
hist_vec = &read_hist[rw_index];
for(j=0; j<n_coef8; j++)
{
ix = index_vec[0];
sum += coef_vec[0] * hist_vec[ix];
ix = index_vec[1];
sum += coef_vec[1] * hist_vec[ix];
ix = index_vec[2];
sum += coef_vec[2] * hist_vec[ix];
ix = index_vec[3];
sum += coef_vec[3] * hist_vec[ix];
ix = index_vec[4];
sum += coef_vec[4] * hist_vec[ix];
ix = index_vec[5];
sum += coef_vec[5] * hist_vec[ix];
ix = index_vec[6];
sum += coef_vec[6] * hist_vec[ix];
ix = index_vec[7];
sum += coef_vec[7] * hist_vec[ix];
coef_vec += 8;
index_vec += 8;
}
for(j=n_coef8*8; j<n_coef; j++)
{
ix = index[j];
sum += coef[j] * read_hist[rw_index+ix];
}
out[i] = sum;
rw_index++;
if(rw_index >= order)
rw_index -= order;
}
x->x_rw_index = rw_index;
return(w+5);
sparse_FIR_tilde_perf_zero:
while(n--)
*out++ = 0.0f;
return(w+5);
}
static void sparse_FIR_tilde_list(t_sparse_FIR_tilde *x, t_symbol *s, int argc, t_atom *argv)
{
int order = x->x_sparse_FIR_order;
int n_arg2 = argc/2, index, i;
int n_coef = 0;
int *index_pointer = x->x_index_beg;
t_float *coef_pointer = x->x_coef_beg;
t_float coef;
for(i=0; i<n_arg2; i++)
{
index = (int)atom_getfloat(argv++);
coef = (t_float)atom_getfloat(argv++);
if((index >= 0) && (index < order))
{
*index_pointer++ = -index;
*coef_pointer++ = coef;
n_coef++;
}
}
x->x_n_coef = n_coef;
}
static void sparse_FIR_tilde_matrix(t_sparse_FIR_tilde *x, t_symbol *s, int argc, t_atom *argv)
{
int row, col;
if(argc < 2)
{
post("sparse_FIR~ : corrupt matrix passed");
return;
}
row = (int)atom_getfloat(argv++);
col = (int)atom_getfloat(argv++);
if((row < 1)||(col < 1))
{
post("sparse_FIR~ : corrupt matrix passed");
return;
}
if((row*col) < (argc - 2))
{
post("sparse_FIR~ WARNING: row column product less than message content!");
sparse_FIR_tilde_list(x, &s_list, row*col, argv);
}
else if((row*col) > (argc-2))
{
post("sparse_FIR~ WARNING: row column product greater than message content!");
sparse_FIR_tilde_list(x, &s_list, argc-2, argv);
}
else
sparse_FIR_tilde_list(x, &s_list, argc-2, argv);
}
static void sparse_FIR_tilde_order(t_sparse_FIR_tilde *x, t_floatarg fn)
{
int n = (int)fn;
if(n > 0)
{
if(n > x->x_sparse_FIR_order)/* resize */
{
x->x_history_beg = (t_float *)resizebytes(x->x_history_beg, 2*x->x_n_coef_malloc*sizeof(t_float), 2*n*sizeof(t_float));
x->x_index_beg = (int *)resizebytes(x->x_index_beg, x->x_n_coef_malloc*sizeof(int), n*sizeof(int));
x->x_coef_beg = (t_float *)resizebytes(x->x_coef_beg, x->x_n_coef_malloc*sizeof(t_float), n*sizeof(t_float));
x->x_n_coef_malloc = n;
}
x->x_sparse_FIR_order = n;
x->x_rw_index = 0;
}
}
static void sparse_FIR_tilde_dsp(t_sparse_FIR_tilde *x, t_signal **sp)
{
dsp_add(sparse_FIR_tilde_perform, 4, sp[0]->s_vec, sp[1]->s_vec, x, sp[0]->s_n);
}
static void *sparse_FIR_tilde_new(t_floatarg fn)
{
t_sparse_FIR_tilde *x = (t_sparse_FIR_tilde *)pd_new(sparse_FIR_tilde_class);
int n=(int)fn;
outlet_new(&x->x_obj, &s_signal);
x->x_msi = 0;
x->x_n_coef = 0;
if(n < 1)
n = 1;
x->x_sparse_FIR_order = n;
x->x_n_coef_malloc = n;
x->x_history_beg = (t_float *)getbytes((2*x->x_n_coef_malloc)*sizeof(t_float));
x->x_index_beg = (int *)getbytes(x->x_n_coef_malloc*sizeof(int));
x->x_coef_beg = (t_float *)getbytes(x->x_n_coef_malloc*sizeof(t_float));
x->x_rw_index = 0;
return(x);
}
static void sparse_FIR_tilde_free(t_sparse_FIR_tilde *x)
{
if(x->x_history_beg)
freebytes(x->x_history_beg, (2*x->x_n_coef_malloc)*sizeof(t_float));
if(x->x_index_beg)
freebytes(x->x_index_beg, x->x_n_coef_malloc*sizeof(int));
if(x->x_coef_beg)
freebytes(x->x_coef_beg, x->x_n_coef_malloc*sizeof(t_float));
}
void sparse_FIR_tilde_setup(void)
{
sparse_FIR_tilde_class = class_new(gensym("sparse_FIR~"), (t_newmethod)sparse_FIR_tilde_new,
(t_method)sparse_FIR_tilde_free, sizeof(t_sparse_FIR_tilde), 0, A_DEFFLOAT, 0);
CLASS_MAINSIGNALIN(sparse_FIR_tilde_class, t_sparse_FIR_tilde, x_msi);
class_addmethod(sparse_FIR_tilde_class, (t_method)sparse_FIR_tilde_dsp, gensym("dsp"), 0);
class_addlist(sparse_FIR_tilde_class, (t_method)sparse_FIR_tilde_list);
class_addmethod(sparse_FIR_tilde_class, (t_method)sparse_FIR_tilde_matrix, gensym("matrix"), A_GIMME, 0);
class_addmethod(sparse_FIR_tilde_class, (t_method)sparse_FIR_tilde_order, gensym("order"), A_FLOAT, 0);
class_addmethod(sparse_FIR_tilde_class, (t_method)sparse_FIR_tilde_order, gensym("size"), A_FLOAT, 0);
}
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