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/* sc4pd
BRZ2~
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: William Parker: Compassion Seizes Bed-Stuy
*/
#include "sc4pd.hpp"
/* ------------------------ BRZ2~ -------------------------------*/
class BRZ2_ar:
public sc4pd_dsp
{
FLEXT_HEADER(BRZ2_ar,sc4pd_dsp);
public:
BRZ2_ar(int argc, t_atom *argv);
protected:
virtual void m_signal(int n, t_sample *const *in, t_sample *const *out);
virtual void m_dsp(int n, t_sample *const *in, t_sample *const *out)
{
mFilterLoops=sc_filterloops();
mFilterRemain=sc_filterremain();
}
private:
float m_x1, m_x2;
int mFilterLoops, mFilterRemain;
};
FLEXT_LIB_DSP_V("BRZ2~",BRZ2_ar);
BRZ2_ar::BRZ2_ar(int argc, t_atom *argv)
{
AddOutSignal();
m_x1=0;
m_x2=0;
}
void BRZ2_ar::m_signal(int n, t_sample *const *in,
t_sample *const *out)
{
t_sample *nin = *in;
t_sample *nout = *out;
float x0;
float x1 = m_x1;
float x2 = m_x2;
for (int i = 0; i!=mFilterLoops ;++i)
{
x0 = ZXP(nin);
ZXP(nout) = (x0 + x2) * 0.5f;
x2 = ZXP(nin);
ZXP(nout) = (x2 + x1) * 0.5f;
x1 = ZXP(nin);
ZXP(nout) = (x1 + x0) * 0.5f;
}
for (int i = 0; i!= mFilterRemain;++i)
{
x0 = ZXP(nin);
ZXP(nout) = (x0 + x2) * 0.5f;
x2 = x1;
x1 = x0;
}
m_x1 = x1;
m_x2 = x2;
}
/* ------------------------ BRZ2 -------------------------------*/
class BRZ2_kr:
public flext_base
{
FLEXT_HEADER(BRZ2_kr,flext_base);
public:
BRZ2_kr(int argc, t_atom *argv);
protected:
void m_perform (float f);
private:
float m_x1;
float m_x2;
FLEXT_CALLBACK_F(m_perform);
};
FLEXT_LIB_V("BRZ2",BRZ2_kr);
BRZ2_kr::BRZ2_kr(int argc, t_atom *argv)
{
FLEXT_ADDMETHOD(0,m_perform);
AddOutFloat();
m_x2 = m_x1 = 0;
}
void BRZ2_kr::m_perform(float f)
{
ToOutFloat(0,(f + m_x2) * 0.5f);
m_x2=m_x1;
m_x1=f;
}
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