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/* sc4pd
BrownNoise, BrownNoise~
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: Laminal
*/
#include "sc4pd.hpp"
/* ------------------------ BrownNoise~ -------------------------------*/
class BrownNoise_ar:
public flext_dsp
{
FLEXT_HEADER(BrownNoise_ar,flext_dsp);
public:
BrownNoise_ar(int argc, t_atom *argv);
protected:
virtual void m_signal(int n, t_sample *const *in, t_sample *const *out);
void m_seed(int i)
{
rgen.init(i);
}
private:
float m_level;
RGen rgen;
FLEXT_CALLBACK_I(m_seed);
};
FLEXT_LIB_DSP_V("BrownNoise~",BrownNoise_ar);
BrownNoise_ar::BrownNoise_ar(int argc, t_atom *argv)
{
//parse arguments
AtomList Args(argc,argv);
rgen.init(timeseed());
m_level=rgen.frand2();
FLEXT_ADDMETHOD_(0,"seed",m_seed);
AddOutSignal();
}
void BrownNoise_ar::m_signal(int n, t_sample *const *in,
t_sample *const *out)
{
t_sample *nout = *out;
RGET;
float z = m_level;
for (int i = 0; i!= n;++i)
{
z += frand8(s1, s2, s3);
if (z > 1.f)
z = 2.f - z;
else
if (z < -1.f)
z = -2.f - z;
(*(nout)++) = z;
}
m_level = z;
RPUT;
}
/* ------------------------ BrownNoise ---------------------------------*/
class BrownNoise_kr:
public flext_base
{
FLEXT_HEADER(BrownNoise_kr,flext_base);
public:
BrownNoise_kr(int argc, t_atom *argv);
protected:
void m_perform();
void m_seed(int i)
{
rgen.init(i);
}
private:
float m_level;
RGen rgen;
FLEXT_CALLBACK(m_perform);
FLEXT_CALLBACK_I(m_seed);
};
FLEXT_LIB_V("BrownNoise",BrownNoise_kr);
BrownNoise_kr::BrownNoise_kr(int argc, t_atom *argv)
{
FLEXT_ADDBANG(0,m_perform);
FLEXT_ADDMETHOD_(0,"seed",m_seed);
//parse arguments
AtomList Args(argc,argv);
rgen.init(timeseed());
m_level=rgen.frand2();
AddOutFloat();
}
void BrownNoise_kr::m_perform()
{
float z = m_level + rgen.frand8();
if (z > 1.f)
z = 2.f - z;
else
if (z < -1.f)
z = -2.f - z;
ToOutFloat(0,z);
m_level = z;
}
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