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/* sc4pd
Integrator~, Integrator
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: AMM: AMMMusic 1966
*/
#include "sc4pd.hpp"
/* ------------------------ Integrator~ -----------------------------*/
class Integrator_ar
:public sc4pd_dsp
{
FLEXT_HEADER(Integrator_ar,sc4pd_dsp);
public:
Integrator_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);
private:
FLEXT_CALLBACK_F(m_set);
float m_b1; //leak
float m_y1; //z-1
};
FLEXT_LIB_DSP_V("Integrator~",Integrator_ar);
Integrator_ar::Integrator_ar(int argc,t_atom * argv)
{
FLEXT_ADDMETHOD_(0,"leak",m_set);
AtomList Args(argc,argv);
m_b1 = sc_getfloatarg(Args,0);
AddOutSignal();
m_y1 = 0.f;
}
void Integrator_ar::m_signal(int n, t_sample *const *in,
t_sample *const *out)
{
t_sample *nout = *out;
t_sample *nin = *in;
float b1 = m_b1;
float y1 = m_y1;
if (b1 == m_b1)
{
if (b1 == 1.f)
{
for (int i = 0; i!= n;++i)
{
float y0 = (*(nin)++);
(*(nout)++) = y1 = y0 + y1;
}
}
else if (b1 == 0.f)
{
for (int i = 0; i!= n;++i)
{
float y0 = (*(nin)++);
(*(nout)++) = y1 = y0;
}
}
else
{
for (int i = 0; i!= n;++i)
{
float y0 = (*(nin)++);
(*(nout)++) = y1 = y0 + b1 * y1;
}
}
}
else
{
float b1_slope = CALCSLOPE(m_b1, b1);
if (b1 >= 0.f && m_b1 >= 0)
{
for (int i = 0; i!= n;++i)
{
float y0 = (*(nin)++);
(*(nout)++) = y1 = y0 + b1 * (y1 - y0);
b1 += b1_slope;
}
}
else if (b1 <= 0.f && m_b1 <= 0)
{
for (int i = 0; i!= n;++i)
{
float y0 = (*(nin)++);
(*(nout)++) = y1 = y0 + b1 * (y1 + y0);
b1 += b1_slope;
}
}
else
{
for (int i = 0; i!= n;++i)
{
float y0 = (*(nin)++);
(*(nout)++) = y1 = (1.f - fabs(b1)) * y0 + b1 * y1;
b1 += b1_slope;
}
}
}
m_y1 = zapgremlins(y1);
}
void Integrator_ar::m_set(float f)
{
m_b1=f;
}
/* ------------------------ Integrator ------------------------------*/
class Integrator_kr
:public flext_base
{
FLEXT_HEADER(Integrator_kr,flext_base);
public:
Integrator_kr(int argc,t_atom * argv);
protected:
void m_set(float f);
void m_perform(float f);
private:
float m_b1; //leak
float m_y1; //z-1
FLEXT_CALLBACK_F(m_set);
FLEXT_CALLBACK_F(m_perform);
};
FLEXT_LIB_V("Integrator",Integrator_kr);
Integrator_kr::Integrator_kr(int argc,t_atom * argv)
{
AtomList Args(argc,argv);
m_b1 = sc_getfloatarg(Args,0);
m_y1 = 0.f;
AddInFloat();
AddOutFloat();
FLEXT_ADDMETHOD(0,m_perform);
FLEXT_ADDMETHOD_(0,"leak",m_set);
}
void Integrator_kr::m_perform(float f)
{
m_y1 = f + m_y1 * m_b1;
ToOutFloat(0,m_y1);
}
void Integrator_kr::m_set(float f)
{
m_b1=f;
}
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