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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 <math.h>
#include "m_pd.h"
#include "sickle/sic.h"
/* LATER ask about osx */
#if defined(NT) || defined(MACOSX)
#define atanhf(x) (log((1 + x) / (1 - x)) * 0.5)
#endif
typedef t_sic t_atanh;
static t_class *atanh_class;
static t_int *atanh_perform(t_int *w)
{
int nblock = (int)(w[1]);
t_float *in = (t_float *)(w[2]);
t_float *out = (t_float *)(w[3]);
while (nblock--)
{
float f = *in++;
*out++ = atanhf(f); /* CHECKME no protection against NaNs */
}
return (w + 4);
}
static void atanh_dsp(t_atanh *x, t_signal **sp)
{
dsp_add(atanh_perform, 3, sp[0]->s_n, sp[0]->s_vec, sp[1]->s_vec);
}
static void *atanh_new(void)
{
t_atanh *x = (t_atanh *)pd_new(atanh_class);
outlet_new((t_object *)x, &s_signal);
return (x);
}
void atanh_tilde_setup(void)
{
atanh_class = class_new(gensym("atanh~"),
(t_newmethod)atanh_new, 0,
sizeof(t_atanh), 0, 0);
sic_setup(atanh_class, atanh_dsp, SIC_FLOATTOSIGNAL);
}
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