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/* Copyright 2002 Benjamin R. Saylor
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "m_pd.h"
#ifdef _MSC_VER
#pragma warning( disable : 4244 )
#pragma warning( disable : 4305 )
#endif
static t_class *zhzxh_class;
typedef struct _zhzxh {
t_object x_obj;
t_float slope;
t_float lastval;
t_float srate;
t_float f;
} t_zhzxh;
static t_int *zhzxh_perform(t_int *w)
{
t_zhzxh *x = (t_zhzxh *)(w[1]);
t_float *in = (t_float *)(w[2]);
t_float *out = (t_float *)(w[3]);
int n = (int)(w[4]);
t_float f;
t_float lastval = x->lastval;
t_float delta = x->slope / x->srate;
while (n--) {
f = *(in++);
if (lastval < f)
*out = lastval + delta;
else
*out = lastval - delta;
lastval = *(out++);
}
x->lastval = lastval;
return (w+5);
}
static void zhzxh_dsp(t_zhzxh *x, t_signal **sp)
{
dsp_add(zhzxh_perform, 4, x, sp[0]->s_vec, sp[1]->s_vec, sp[0]->s_n);
}
static void *zhzxh_new(t_symbol *s, int argc, t_atom *argv)
{
t_zhzxh *x = (t_zhzxh *)pd_new(zhzxh_class);
x->slope = 1;
x->lastval = 0;
x->srate = sys_getsr();
floatinlet_new(&x->x_obj, &x->slope);
outlet_new(&x->x_obj, gensym("signal"));
return (x);
}
void zhzxh_tilde_setup(void)
{
zhzxh_class = class_new(gensym("zhzxh~"), (t_newmethod)zhzxh_new, 0, sizeof(t_zhzxh), 0, A_GIMME, 0);
CLASS_MAINSIGNALIN(zhzxh_class, t_zhzxh, f);
class_addmethod(zhzxh_class, (t_method)zhzxh_dsp, gensym("dsp"), 0);
}
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