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/*
* fwarp.c - converts a frequency to a "standard" tangent warped freq
* Copyright (c) 2000-2003 by Tom Schouten
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "m_pd.h"
#include <math.h>
#define SEQL 16
typedef struct fwarp
{
t_object t_ob;
t_outlet *x_out;
} t_fwarp;
static void fwarp_float(t_fwarp *x, t_floatarg f)
{
float twopi = 2.0f * M_PI;
float sr = sys_getsr();
f /= sr;
f = tan(twopi * f) / twopi;
outlet_float(x->x_out, f * sr);
}
static void fwarp_free(void)
{
}
t_class *fwarp_class;
static void *fwarp_new(void)
{
t_fwarp *x = (t_fwarp *)pd_new(fwarp_class);
x->x_out = outlet_new(&x->t_ob, gensym("float"));
return (void *)x;
}
void fwarp_setup(void)
{
fwarp_class = class_new(gensym("fwarp"), (t_newmethod)fwarp_new,
(t_method)fwarp_free, sizeof(t_fwarp), 0, 0);
class_addfloat(fwarp_class, fwarp_float);
}
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