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/* Copyright (c) 2003 krzYszcz and others.
* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution. */
#include <string.h>
#include "m_pd.h"
#include "common/loud.h"
#include "sickle/sic.h"
#include "sickle/arsic.h"
#define BUFFIR_DEFSIZE 0 /* CHECKED */
#define BUFFIR_MAXSIZE 128
typedef struct _buffir
{
t_arsic x_arsic;
t_pd *x_offinlet;
t_pd *x_sizinlet;
t_float *x_lohead;
t_float *x_hihead;
int x_histsize;
t_float *x_histlo;
t_float *x_histhi;
t_float x_histini[2 * BUFFIR_MAXSIZE];
} t_buffir;
static t_class *buffir_class;
static void buffir_setrange(t_buffir *x, t_floatarg f1, t_floatarg f2)
{
int off = (int)f1;
int siz = (int)f2;
if (off < 0)
off = 0;
if (siz <= 0)
siz = BUFFIR_DEFSIZE;
if (siz > x->x_histsize)
{
int newsize, pos = x->x_lohead - x->x_histlo;
int oldbytes = x->x_histsize * sizeof(*x->x_histlo);
if (shared_getmaxcompatibility())
{
static int warned = 0;
if (!warned)
{
loud_incompatible(buffir_class, "stretching history buffer");
warned = 1;
}
}
newsize = x->x_histsize * 2;
while (newsize < siz) newsize *= 2;
if (x->x_histlo == x->x_histini)
{
if (!(x->x_histlo = getbytes(2 * newsize * sizeof(*x->x_histlo))))
x->x_histlo = x->x_histini;
else
{
x->x_histhi = x->x_histlo + newsize;
memcpy(x->x_histhi + pos - x->x_histsize,
x->x_lohead, oldbytes);
x->x_lohead = x->x_histlo + pos;
x->x_hihead = x->x_histhi + pos;
x->x_histsize = newsize;
}
}
else
{
if (!(x->x_histlo =
resizebytes(x->x_histlo, 2 * oldbytes,
2 * newsize * sizeof(*x->x_histlo))))
{
x->x_histsize = BUFFIR_MAXSIZE;
x->x_histlo = x->x_histini;
memset(x->x_histlo, 0,
2 * x->x_histsize * sizeof(*x->x_histlo));
x->x_lohead = x->x_histlo;
x->x_hihead = x->x_histhi = x->x_histlo + x->x_histsize;
}
else
{
x->x_histhi = x->x_histlo + newsize;
memcpy(x->x_histhi + pos - x->x_histsize,
x->x_lohead, oldbytes);
x->x_lohead = x->x_histlo + pos;
x->x_hihead = x->x_histhi + pos;
x->x_histsize = newsize;
}
}
}
pd_float(x->x_offinlet, off);
pd_float(x->x_sizinlet, siz);
}
static void buffir_clear(t_buffir *x)
{
memset(x->x_histlo, 0, 2 * x->x_histsize * sizeof(*x->x_histlo));
x->x_lohead = x->x_histlo;
x->x_hihead = x->x_histhi = x->x_histlo + x->x_histsize;
}
static void buffir_set(t_buffir *x, t_symbol *s, t_floatarg f1, t_floatarg f2)
{
arsic_setarray((t_arsic *)x, s, 1);
buffir_setrange(x, f1, f2);
}
static t_int *buffir_perform(t_int *w)
{
t_arsic *sic = (t_arsic *)(w[1]);
t_buffir *x = (t_buffir *)sic;
int nblock = (int)(w[2]);
t_float *xin = (t_float *)(w[3]);
t_float *out = (t_float *)(w[6]);
t_float *lohead = x->x_lohead;
t_float *hihead = x->x_hihead;
if (sic->s_playable)
{
t_float *oin = (t_float *)(w[4]);
t_float *sin = (t_float *)(w[5]);
int vecsize = sic->s_vecsize;
t_float *vec = sic->s_vectors[0]; /* playable implies nonzero (mono) */
int histsize = x->x_histsize;
while (nblock--)
{
/* CHECKME every sample or once per block.
If once per block, then LATER think about performance. */
/* CHECKME rounding */
int off = (int)*oin++;
int npoints = (int)*sin++;
if (off < 0)
off = 0;
if (npoints > histsize)
npoints = histsize;
if (npoints > vecsize - off)
npoints = vecsize - off;
if (npoints > 0)
{
t_float *coefp = vec + off;
t_float *hp = hihead;
t_float sum = 0.;
*lohead++ = *hihead++ = *xin++;
while (npoints--)
sum += *coefp++ * *hp--;
*out++ = sum;
}
else
{
*lohead++ = *hihead++ = *xin++;
*out++ = 0.;
}
if (lohead >= x->x_histhi)
{
lohead = x->x_histlo;
hihead = x->x_histhi;
}
}
}
else while (nblock--)
{
*lohead++ = *hihead++ = *xin++;
*out++ = 0.;
if (lohead >= x->x_histhi)
{
lohead = x->x_histlo;
hihead = x->x_histhi;
}
}
x->x_lohead = lohead;
x->x_hihead = hihead;
return (w + 7);
}
static void buffir_dsp(t_buffir *x, t_signal **sp)
{
arsic_dsp((t_arsic *)x, sp, buffir_perform, 1);
}
static void buffir_free(t_buffir *x)
{
if (x->x_histlo != x->x_histini)
freebytes(x->x_histlo, 2 * x->x_histsize * sizeof(*x->x_histlo));
arsic_free((t_arsic *)x);
}
static void *buffir_new(t_symbol *s, t_floatarg f1, t_floatarg f2)
{
/* CHECKME always the first channel used. */
/* three auxiliary signals: main, offset and size inputs */
t_buffir *x = (t_buffir *)arsic_new(buffir_class, s, 0, 0, 3);
if (x)
{
arsic_setminsize((t_arsic *)x, 1);
x->x_offinlet = (t_pd *)sic_newinlet((t_sic *)x, f1);
x->x_sizinlet = (t_pd *)sic_newinlet((t_sic *)x, f2);
outlet_new((t_object *)x, &s_signal);
x->x_histsize = BUFFIR_MAXSIZE;
x->x_histlo = x->x_histini;
buffir_clear(x);
buffir_setrange(x, f1, f2);
shared_usecompatibility();
}
return (x);
}
void buffir_tilde_setup(void)
{
buffir_class = class_new(gensym("buffir~"),
(t_newmethod)buffir_new,
(t_method)buffir_free,
sizeof(t_buffir), 0,
A_DEFSYM, A_DEFFLOAT, A_DEFFLOAT, 0);
arsic_setup(buffir_class, buffir_dsp, SIC_FLOATTOSIGNAL);
class_addmethod(buffir_class, (t_method)buffir_clear,
gensym("clear"), 0);
class_addmethod(buffir_class, (t_method)buffir_set,
gensym("set"), A_SYMBOL, A_DEFFLOAT, A_DEFFLOAT, 0);
}
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