ca755f767c
Change pdbox include paths to handle this git-svn-id: svn://svn.rockbox.org/rockbox/trunk@24916 a1c6a512-1295-4272-9138-f99709370657
130 lines
3.5 KiB
C
130 lines
3.5 KiB
C
#ifdef ROCKBOX
|
|
#include "plugin.h"
|
|
#include "../../pdbox.h"
|
|
#else /* ROCKBOX */
|
|
#define FIXEDPOINT
|
|
#endif /* ROCKBOX */
|
|
#include "../src/m_pd.h"
|
|
#include <../src/m_fixed.h>
|
|
|
|
|
|
#define MAXOVERLAP 10
|
|
#define MAXVSTAKEN 64
|
|
|
|
typedef struct sigenv
|
|
{
|
|
t_object x_obj; /* header */
|
|
void *x_outlet; /* a "float" outlet */
|
|
void *x_clock; /* a "clock" object */
|
|
t_sample *x_buf; /* a Hanning window */
|
|
int x_phase; /* number of points since last output */
|
|
int x_period; /* requested period of output */
|
|
int x_realperiod; /* period rounded up to vecsize multiple */
|
|
int x_npoints; /* analysis window size in samples */
|
|
t_float x_result; /* result to output */
|
|
t_sample x_sumbuf[MAXOVERLAP]; /* summing buffer */
|
|
t_float x_f;
|
|
} t_sigenv;
|
|
|
|
t_class *sigenv_class;
|
|
static void sigenv_tick(t_sigenv *x);
|
|
|
|
static void *sigenv_new(t_floatarg fnpoints, t_floatarg fperiod)
|
|
{
|
|
int npoints = fnpoints;
|
|
int period = fperiod;
|
|
t_sigenv *x;
|
|
t_sample *buf;
|
|
int i;
|
|
|
|
if (npoints < 1) npoints = 1024;
|
|
if (period < 1) period = npoints/2;
|
|
if (period < npoints / MAXOVERLAP + 1)
|
|
period = npoints / MAXOVERLAP + 1;
|
|
if (!(buf = getbytes(sizeof(t_sample) * (npoints + MAXVSTAKEN))))
|
|
{
|
|
error("env: couldn't allocate buffer");
|
|
return (0);
|
|
}
|
|
x = (t_sigenv *)pd_new(sigenv_class);
|
|
x->x_buf = buf;
|
|
x->x_npoints = npoints;
|
|
x->x_phase = 0;
|
|
x->x_period = period;
|
|
for (i = 0; i < MAXOVERLAP; i++) x->x_sumbuf[i] = 0;
|
|
for (i = 0; i < npoints; i++)
|
|
buf[i] = ftofix((1. - cos((2 * 3.14159 * i) / npoints))/npoints);
|
|
for (; i < npoints+MAXVSTAKEN; i++) buf[i] = 0;
|
|
x->x_clock = clock_new(x, (t_method)sigenv_tick);
|
|
x->x_outlet = outlet_new(&x->x_obj, gensym("float"));
|
|
x->x_f = 0;
|
|
return (x);
|
|
}
|
|
|
|
static t_int *sigenv_perform(t_int *w)
|
|
{
|
|
t_sigenv *x = (t_sigenv *)(w[1]);
|
|
t_sample *in = (t_sample *)(w[2]);
|
|
int n = (int)(w[3]);
|
|
int count;
|
|
t_sample *sump;
|
|
in += n;
|
|
for (count = x->x_phase, sump = x->x_sumbuf;
|
|
count < x->x_npoints; count += x->x_realperiod, sump++)
|
|
{
|
|
t_sample *hp = x->x_buf + count;
|
|
t_sample *fp = in;
|
|
t_sample sum = *sump;
|
|
int i;
|
|
|
|
for (i = 0; i < n; i++)
|
|
{
|
|
fp--;
|
|
sum += *hp++ * ((*fp * *fp)>>16)>>16;
|
|
}
|
|
*sump = sum;
|
|
}
|
|
sump[0] = 0;
|
|
x->x_phase -= n;
|
|
if (x->x_phase < 0)
|
|
{
|
|
x->x_result = x->x_sumbuf[0];
|
|
for (count = x->x_realperiod, sump = x->x_sumbuf;
|
|
count < x->x_npoints; count += x->x_realperiod, sump++)
|
|
sump[0] = sump[1];
|
|
sump[0] = 0;
|
|
x->x_phase = x->x_realperiod - n;
|
|
clock_delay(x->x_clock, 0L);
|
|
}
|
|
return (w+4);
|
|
}
|
|
|
|
static void sigenv_dsp(t_sigenv *x, t_signal **sp)
|
|
{
|
|
if (x->x_period % sp[0]->s_n) x->x_realperiod =
|
|
x->x_period + sp[0]->s_n - (x->x_period % sp[0]->s_n);
|
|
else x->x_realperiod = x->x_period;
|
|
dsp_add(sigenv_perform, 3, x, sp[0]->s_vec, sp[0]->s_n);
|
|
if (sp[0]->s_n > MAXVSTAKEN) bug("sigenv_dsp");
|
|
}
|
|
|
|
static void sigenv_tick(t_sigenv *x) /* callback function for the clock */
|
|
{
|
|
outlet_float(x->x_outlet, powtodb(x->x_result*3.051757e-05));
|
|
}
|
|
|
|
static void sigenv_ff(t_sigenv *x) /* cleanup on free */
|
|
{
|
|
clock_free(x->x_clock);
|
|
freebytes(x->x_buf, (x->x_npoints + MAXVSTAKEN) * sizeof(float));
|
|
}
|
|
|
|
|
|
void env_tilde_setup(void )
|
|
{
|
|
sigenv_class = class_new(gensym("env~"), (t_newmethod)sigenv_new,
|
|
(t_method)sigenv_ff, sizeof(t_sigenv), 0, A_DEFFLOAT, A_DEFFLOAT, 0);
|
|
CLASS_MAINSIGNALIN(sigenv_class, t_sigenv, x_f);
|
|
class_addmethod(sigenv_class, (t_method)sigenv_dsp, gensym("dsp"), 0);
|
|
}
|
|
|