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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.
iem_delay written by Thomas Musil (c) IEM KUG Graz Austria 2002 - 2006 */
#include "m_pd.h"
#include "iemlib.h"
#include "iem_delay.h"
/* -------------------------- nz_tilde~ ------------------------------ */
static t_class *nz_tilde_class;
typedef struct _nz_tilde
{
t_object x_obj;
t_float *x_begmem1;
t_float *x_begmem2;
int x_mallocsize;
int x_max_delay_samples;
int x_n_delays;
int x_writeindex;
int *x_del_samples;
int x_blocksize;
t_float **x_io;
t_float x_msi;
} t_nz_tilde;
static void nz_tilde_list(t_nz_tilde *x, t_symbol *s, int argc, t_atom *argv)
{
if(argc == x->x_n_delays)
{
int i, delay, max=x->x_max_delay_samples;
for(i=0; i<argc; i++)
{
delay = atom_getint(argv++);
if(delay < 0)
delay = 0;
if(delay > max)
delay = max;
x->x_del_samples[i] = delay;
}
}
else
post("nz~-ERROR: list need %d delay-values between 0 and %d samples !!!!", x->x_n_delays, x->x_max_delay_samples);
}
static t_int *nz_tilde_perform(t_int *w)
{
t_nz_tilde *x = (t_nz_tilde *)(w[1]);
int n=(int)(w[2]);
int num_dels=x->x_n_delays;
t_float *in;
t_float *out;
int i, j;
t_float *writevec1;
t_float *writevec2;
t_float *readvec;
writevec2 = x->x_begmem2 + x->x_writeindex;
writevec1 = x->x_begmem1 + x->x_writeindex;
in = x->x_io[0];
for(i=0; i<n; i++)
{
writevec2[i] = in[i];
writevec1[i] = in[i];
}
for(j=0; j<num_dels; j++)
{
out = x->x_io[j+1];
readvec = writevec2 - x->x_del_samples[j];
for(i=0; i<n; i++)
out[i] = readvec[i];
}
x->x_writeindex += n;
if(x->x_writeindex >= x->x_mallocsize)
x->x_writeindex -= x->x_mallocsize;
return(w+3);
}
static t_int *nz_tilde_perf8(t_int *w)
{
t_nz_tilde *x = (t_nz_tilde *)(w[1]);
int n=(int)(w[2]);
int num_dels=x->x_n_delays;
t_float *in;
t_float *out;
int i, j;
t_float *writevec1;
t_float *writevec2;
t_float *readvec;
writevec2 = x->x_begmem2 + x->x_writeindex;
writevec1 = x->x_begmem1 + x->x_writeindex;
in = x->x_io[0];
i = n;
while(i)
{
writevec2[0] = in[0];
writevec2[1] = in[1];
writevec2[2] = in[2];
writevec2[3] = in[3];
writevec2[4] = in[4];
writevec2[5] = in[5];
writevec2[6] = in[6];
writevec2[7] = in[7];
writevec1[0] = in[0];
writevec1[1] = in[1];
writevec1[2] = in[2];
writevec1[3] = in[3];
writevec1[4] = in[4];
writevec1[5] = in[5];
writevec1[6] = in[6];
writevec1[7] = in[7];
writevec2 += 8;
writevec1 += 8;
in += 8;
i -= 8;
}
for(j=0; j<num_dels; j++)
{
out = x->x_io[j+1];
readvec = writevec2 - x->x_del_samples[j];
i = n;
while(i)
{
out[0] = readvec[0];
out[1] = readvec[1];
out[2] = readvec[2];
out[3] = readvec[3];
out[4] = readvec[4];
out[5] = readvec[5];
out[6] = readvec[6];
out[7] = readvec[7];
out += 8;
readvec += 8;
i -= 8;
}
}
x->x_writeindex += n;
if(x->x_writeindex >= x->x_mallocsize)
x->x_writeindex -= x->x_mallocsize;
return(w+3);
}
static void nz_tilde_dsp(t_nz_tilde *x, t_signal **sp)
{
int n = sp[0]->s_n;
int i, j, max_samps, num_dels = x->x_n_delays + 1;
if(!x->x_blocksize)/*first time*/
{
max_samps = x->x_max_delay_samples;
i = max_samps / n;
j = max_samps - i * n;
/* allocate memory as a multiple of blocksize */
if(j)
max_samps = (i+1) * n;
else
max_samps = i * n;
// post("malloc = %d, maxdel = %d", max_samps, x->x_max_delay_samples);
x->x_mallocsize = max_samps;
x->x_begmem1 = (t_float *)getbytes(2 * x->x_mallocsize * sizeof(t_float));
x->x_begmem2 = x->x_begmem1 + x->x_mallocsize;
x->x_writeindex = 0;
}
else if(x->x_blocksize != n)
{
max_samps = x->x_max_delay_samples;
i = max_samps / n;
j = max_samps - i * n;
if(j)
max_samps = (i+1) * n;
else
max_samps = i * n;
x->x_begmem1 = (t_float *)resizebytes(x->x_begmem1, 2*x->x_mallocsize*sizeof(t_float), 2*max_samps*sizeof(t_float));
x->x_mallocsize = max_samps;
x->x_begmem2 = x->x_begmem1 + x->x_mallocsize;
x->x_writeindex = 0;
}
x->x_blocksize = n;
for(i=0; i<num_dels; i++)
x->x_io[i] = sp[i]->s_vec;
if(n&7)
dsp_add(nz_tilde_perform, 2, x, n);
else
dsp_add(nz_tilde_perf8, 2, x, n);
}
static void *nz_tilde_new(t_floatarg n_delays, t_floatarg max_delay_samples)
{
t_nz_tilde *x = (t_nz_tilde *)pd_new(nz_tilde_class);
int i, n_out = (int)n_delays;
int max_samps = (int)max_delay_samples;
if(n_out < 1)
n_out = 1;
x->x_n_delays = n_out;
if(max_samps < 1)
max_samps = 1;
x->x_max_delay_samples = max_samps;
x->x_mallocsize = 0;
x->x_begmem1 = (t_float *)0;
x->x_begmem2 = (t_float *)0;
x->x_writeindex = 0;
x->x_blocksize = 0;
x->x_io = (t_float **)getbytes((x->x_n_delays + 1) * sizeof(t_float *));
x->x_del_samples = (int *)getbytes(x->x_n_delays * sizeof(int));
for(i=0; i<n_out; i++)
{
outlet_new(&x->x_obj, &s_signal);
x->x_del_samples[i] = 0;
}
x->x_msi = 0.0f;
return (x);
}
static void nz_tilde_free(t_nz_tilde *x)
{
freebytes(x->x_del_samples, x->x_n_delays * sizeof(int));
freebytes(x->x_io, (x->x_n_delays + 1) * sizeof(t_float *));
if(x->x_begmem1)
freebytes(x->x_begmem1, 2 * x->x_mallocsize * sizeof(t_float));
}
void nz_tilde_setup(void)
{
nz_tilde_class = class_new(gensym("nz~"), (t_newmethod)nz_tilde_new, (t_method)nz_tilde_free,
sizeof(t_nz_tilde), 0, A_DEFFLOAT, A_DEFFLOAT, 0);
CLASS_MAINSIGNALIN(nz_tilde_class, t_nz_tilde, x_msi);
class_addlist(nz_tilde_class, (t_method)nz_tilde_list);
class_addmethod(nz_tilde_class, (t_method)nz_tilde_dsp, gensym("dsp"), 0);
// class_sethelpsymbol(nz_tilde_class, gensym("iemhelp2/nz~-help"));
}
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