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/* Copyright (c) 2002-2003 krzYszcz and others.
* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution. */
/* CHECKME no reset after changing of a window size? */
/* CHECKME overlap */
#include <math.h>
#include "m_pd.h"
#include "sickle/sic.h"
#if defined(NT) || defined(MACOSX)
/* cf pd/src/x_arithmetic.c */
#define sqrtf sqrt
#endif
#define AVERAGE_DEFNPOINTS 100 /* CHECKME */
#define AVERAGE_DEFMODE AVERAGE_BIPOLAR
enum { AVERAGE_BIPOLAR, AVERAGE_ABSOLUTE, AVERAGE_RMS };
typedef struct _average
{
t_sic x_sic;
int x_mode;
float (*x_sumfn)(t_float*, int, float);
int x_phase;
int x_npoints;
float x_result;
float x_accum;
t_clock *x_clock;
} t_average;
static t_class *average_class;
static void average_tick(t_average *x)
{
outlet_float(((t_object *)x)->ob_outlet, x->x_result);
}
static float average_bipolarsum(t_float *in, int nxfer, float accum)
{
while (nxfer--)
accum += *in++;
return (accum);
}
static float average_absolutesum(t_float *in, int nxfer, float accum)
{
while (nxfer--)
{
float f = *in++;
accum += (f >= 0 ? f : -f);
}
return (accum);
}
static float average_rmssum(t_float *in, int nxfer, float accum)
{
while (nxfer--)
{
float f = *in++;
accum += f * f;
}
return (accum);
}
static void average_setmode(t_average *x, int mode)
{
if (mode == AVERAGE_BIPOLAR)
x->x_sumfn = average_bipolarsum;
else if (mode == AVERAGE_ABSOLUTE)
x->x_sumfn = average_absolutesum;
else if (mode == AVERAGE_RMS)
x->x_sumfn = average_rmssum;
else
{
bug("average_setmode");
return;
}
x->x_mode = mode;
x->x_phase = x->x_npoints;
x->x_accum = 0;
}
static void average_float(t_average *x, t_float f)
{
int i = (int)f; /* CHECKME noninteger */
if (i > 0) /* CHECKME */
{
x->x_npoints = i;
x->x_phase = x->x_npoints;
x->x_accum = 0;
}
}
static void average_bipolar(t_average *x)
{
average_setmode(x, AVERAGE_BIPOLAR);
}
static void average_absolute(t_average *x)
{
average_setmode(x, AVERAGE_ABSOLUTE);
}
static void average_rms(t_average *x)
{
average_setmode(x, AVERAGE_RMS);
}
static t_int *average_perform(t_int *w)
{
t_average *x = (t_average *)(w[1]);
int nblock = (int)(w[2]);
t_float *in = (t_float *)(w[3]);
float (*sumfn)(t_float*, int, float) = x->x_sumfn;
int phase = x->x_phase;
if (phase <= nblock)
{
float accum = (*sumfn)(in, phase, x->x_accum);
nblock -= phase;
if (x->x_mode == AVERAGE_RMS)
/* CHECKME scaling and FIXME */
x->x_result = sqrtf(accum / x->x_npoints);
else
x->x_result = accum / x->x_npoints;
clock_delay(x->x_clock, 0);
x->x_accum = 0;
if (nblock < x->x_npoints)
x->x_phase = x->x_npoints - nblock;
else
{
x->x_phase = x->x_npoints;
return (w + 4);
}
}
else x->x_phase -= nblock;
x->x_accum = (*sumfn)(in, nblock, x->x_accum);
return (w + 4);
}
static void average_dsp(t_average *x, t_signal **sp)
{
dsp_add(average_perform, 3, x, sp[0]->s_n, sp[0]->s_vec);
}
static void average_free(t_average *x)
{
if (x->x_clock) clock_free(x->x_clock);
}
static void *average_new(t_symbol *s, t_floatarg f)
{
t_average *x = (t_average *)pd_new(average_class);
int i = (int)f; /* CHECKME noninteger */
int mode;
/* CHECKED it looks like memory is allocated for the entire window,
in tune with the refman's note about ``maximum averaging interval'' --
needed for dynamic control over window size, or what? LATER rethink */
x->x_npoints = (i > 0 ? /* CHECKME */
i : AVERAGE_DEFNPOINTS);
if (s == gensym("bipolar"))
mode = AVERAGE_BIPOLAR;
else if (s == gensym("absolute"))
mode = AVERAGE_ABSOLUTE;
else if (s == gensym("rms"))
mode = AVERAGE_RMS;
else
{
mode = AVERAGE_DEFMODE;
/* CHECKME a warning if (s && s != &s_) */
}
average_setmode(x, mode);
/* CHECKME if not x->x_phase = 0 */
outlet_new((t_object *)x, &s_float);
x->x_clock = clock_new(x, (t_method)average_tick);
return (x);
}
void average_tilde_setup(void)
{
average_class = class_new(gensym("average~"),
(t_newmethod)average_new,
(t_method)average_free,
sizeof(t_average), 0,
A_DEFFLOAT, A_DEFSYM, 0);
sic_setup(average_class, average_dsp, average_float);
class_addmethod(average_class, (t_method)average_bipolar,
gensym("bipolar"), 0);
class_addmethod(average_class, (t_method)average_absolute,
gensym("absolute"), 0);
class_addmethod(average_class, (t_method)average_rms,
gensym("rms"), 0);
}
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