[PD-cvs] externals/sc4pd/source OneZero.cpp,NONE,1.1
Tim Blechmann
timblech at users.sourceforge.net
Sat Aug 7 22:45:37 CEST 2004
Update of /cvsroot/pure-data/externals/sc4pd/source
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv20371/source
Added Files:
OneZero.cpp
Log Message:
--- NEW FILE: OneZero.cpp ---
/* sc4pd
OneZero, OneZero~
Copyright (c) 2004 Tim Blechmann.
This code is derived from:
SuperCollider real time audio synthesis system
Copyright (c) 2002 James McCartney. All rights reserved.
http://www.audiosynth.com
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.
Based on:
PureData by Miller Puckette and others.
http://www.crca.ucsd.edu/~msp/software.html
FLEXT by Thomas Grill
http://www.parasitaere-kapazitaeten.net/ext
SuperCollider by James McCartney
http://www.audiosynth.com
Coded while listening to: Goh Lee Kwang: Internal Pleasures
*/
#include "sc4pd.hpp"
/* ------------------------ OneZero~ -------------------------------*/
class OneZero_ar:
public sc4pd_dsp
{
FLEXT_HEADER(OneZero_ar,sc4pd_dsp);
public:
OneZero_ar(int argc, t_atom *argv);
protected:
virtual void m_signal(int n, t_sample *const *in, t_sample *const *out);
void m_set(float f)
{
n_b1=f;
changed = true;
}
private:
float m_b1, m_x1;
float n_b1;
bool changed;
FLEXT_CALLBACK_F(m_set);
};
FLEXT_LIB_DSP_V("OneZero~",OneZero_ar);
OneZero_ar::OneZero_ar(int argc, t_atom *argv)
{
FLEXT_ADDMETHOD_(0,"coef",m_set);
//parse arguments
AtomList Args(argc,argv);
m_b1 = sc_getfloatarg(Args,0);
AddOutSignal();
m_x1 = 0.f;
}
void OneZero_ar::m_signal(int n, t_sample *const *in,
t_sample *const *out)
{
t_sample *nin = *in;
t_sample *nout = *out;
float b1 = m_b1;
float x1 = m_x1;
if (changed)
{
m_b1=n_b1;
float b1_slope = CALCSLOPE(m_b1, b1);
if (b1 >= 0.f && m_b1 >= 0)
{
for (int i = 0; i!= n;++i)
{
float x0 = ZXP(nin);
ZXP(nout) = x0 + b1 * (x1 - x0);
x1 = x0;
b1 += b1_slope;
}
}
else if (b1 <= 0.f && m_b1 <= 0)
{
for (int i = 0; i!= n;++i)
{
float x0 = ZXP(nin);
ZXP(nout) = x0 + b1 * (x1 + x0);
x1 = x0;
b1 += b1_slope;
}
}
else
{
for (int i = 0; i!= n;++i)
{
float x0 = ZXP(nin);
ZXP(nout) = (1.f - fabs(b1)) * x0 + b1 * x1;
x1 = x0;
b1 += b1_slope;
}
}
changed = false;
}
else
{
if (b1 >= 0.f)
{
for (int i = 0; i!= n;++i)
{
float x0 = ZXP(nin);
ZXP(nout) = x0 + b1 * (x1 - x0);
x1 = x0;
}
}
else
{
for (int i = 0; i!= n;++i)
{
float x0 = ZXP(nin);
ZXP(nout) = x0 + b1 * (x1 + x0);
x1 = x0;
}
}
}
m_x1 = x1;
}
/* ------------------------ OneZero ---------------------------------*/
class OneZero_kr:
public flext_base
{
FLEXT_HEADER(OneZero_kr,flext_base);
public:
OneZero_kr(int argc, t_atom *argv);
protected:
void m_perform(float f);
void m_set(float f)
{
m_b1=f;
}
private:
float m_b1, m_x1;
FLEXT_CALLBACK_F(m_set);
FLEXT_CALLBACK_F(m_perform);
};
FLEXT_LIB_V("OneZero",OneZero_kr);
OneZero_kr::OneZero_kr(int argc, t_atom *argv)
{
FLEXT_ADDMETHOD(0,m_perform);
FLEXT_ADDMETHOD_(0,"set",m_set);
AddOutFloat();
//parse arguments
AtomList Args(argc,argv);
m_b1 = sc_getfloatarg(Args,0);
m_x1=0;
}
void OneZero_kr::m_perform(float f)
{
ToOutFloat(0,((1-abs(m_b1))*f)+m_b1*m_x1);
m_x1=f;
}
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