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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. */
#include <string.h>
#include "m_pd.h"
#include "common/grow.h"
#include "sickle/sic.h"
#define FRAMEDELTA_INISIZE 512
typedef struct _framedelta
{
t_sic x_sic;
int x_size;
t_float *x_frame;
t_float x_frameini[FRAMEDELTA_INISIZE];
} t_framedelta;
static t_class *framedelta_class;
static t_int *framedelta_perform(t_int *w)
{
int nblock = (int)(w[1]);
t_float *frame = (t_float *)(w[2]);
t_float *in = (t_float *)(w[3]);
t_float *out = (t_float *)(w[4]);
while (nblock--)
{
float f = *in++;
*out++ = f - *frame; /* CHECKME */
*frame++ = f;
}
return (w + 5);
}
static void framedelta_dsp(t_framedelta *x, t_signal **sp)
{
int nblock = sp[0]->s_n;
if (nblock > x->x_size)
x->x_frame = grow_nodata(&nblock, &x->x_size, x->x_frame,
FRAMEDELTA_INISIZE, x->x_frameini,
sizeof(*x->x_frame));
memset(x->x_frame, 0, nblock * sizeof(*x->x_frame)); /* CHECKME */
dsp_add(framedelta_perform, 4, nblock, x->x_frame,
sp[0]->s_vec, sp[1]->s_vec);
}
static void framedelta_free(t_framedelta *x)
{
if (x->x_frame != x->x_frameini)
freebytes(x->x_frame, x->x_size * sizeof(*x->x_frame));
}
static void *framedelta_new(t_symbol *s, int ac, t_atom *av)
{
t_framedelta *x = (t_framedelta *)pd_new(framedelta_class);
int size;
x->x_size = FRAMEDELTA_INISIZE;
x->x_frame = x->x_frameini;
if ((size = sys_getblksize()) > FRAMEDELTA_INISIZE)
x->x_frame = grow_nodata(&size, &x->x_size, x->x_frame,
FRAMEDELTA_INISIZE, x->x_frameini,
sizeof(*x->x_frame));
outlet_new((t_object *)x, &s_signal);
return (x);
}
void framedelta_tilde_setup(void)
{
framedelta_class = class_new(gensym("framedelta~"),
(t_newmethod)framedelta_new,
(t_method)framedelta_free,
sizeof(t_framedelta), 0, 0);
sic_setup(framedelta_class, framedelta_dsp, SIC_FLOATTOSIGNAL);
}
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