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/* sc4pd
LFDNoise1~
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
*
* DynNoiseUGens.cpp
* xSC3plugins
*
* Created by Alberto de Campo, Sekhar Ramacrishnan, Julian Rohrhuber on Sun May 30 2004.
* Copyright (c) 2004 HfbK. All rights reserved.
*
*
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: Phil Minton & Veryan Weston: Ways Past
*/
#include "sc4pd.hpp"
/* ------------------------ LFDNoise1~ -------------------------------*/
class LFDNoise1_ar:
public sc4pd_dsp
{
FLEXT_HEADER(LFDNoise1_ar,sc4pd_dsp);
public:
LFDNoise1_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);
void m_seed(int i)
{
rgen.init(i);
}
void m_set(float f)
{
m_freq = f;
}
private:
RGen rgen;
float m_freq;
float m_prevlevel;
float m_nextlevel;
float m_phase;
float m_smpdur;
bool m_ar;
FLEXT_CALLBACK_I(m_seed);
FLEXT_CALLBACK_F(m_set);
};
FLEXT_LIB_DSP_V("LFDNoise1~",LFDNoise1_ar);
LFDNoise1_ar::LFDNoise1_ar(int argc, t_atom *argv)
{
FLEXT_ADDMETHOD_(0,"seed",m_seed);
FLEXT_ADDMETHOD_(0,"set",m_set);
//parse arguments
AtomList Args(argc,argv);
m_freq = sc_getfloatarg(Args,0);
rgen.init(timeseed());
m_phase=0.f;
m_prevlevel=0.f;
m_nextlevel = rgen.frand2();
m_ar = sc_ar(Args);
if (m_ar)
AddInSignal("freqency");
else
AddInSignal("\"set\" frequency");
AddOutSignal();
}
void LFDNoise1_ar::m_dsp(int n, t_sample *const *in,
t_sample *const *out)
{
m_smpdur = sc_sampledur();
}
void LFDNoise1_ar::m_signal(int n, t_sample *const *in,
t_sample *const *out)
{
t_sample *nout = *out;
float prevLevel = m_prevlevel;
float nextLevel = m_nextlevel;
float phase = m_phase;
RGET;
if (m_ar)
{
t_sample *nin = *in;
float smpdur = m_smpdur;
for (int i = 0; i!= n; ++i)
{
phase -= ZXP(nin) * smpdur;
if (phase <= 0)
{
phase = sc_wrap(phase, 0.f, 1.f);
prevLevel = nextLevel;
nextLevel = frand2(s1,s2,s3);
}
ZXP(nout) = nextLevel + ( phase * (prevLevel - nextLevel) );
}
}
else
{
float dphase = m_smpdur * m_freq;
for (int i = 0; i!= n; ++i)
{
phase -= dphase;
if (phase <= 0)
{
phase = sc_wrap(phase, 0.f, 1.f);
prevLevel = nextLevel;
nextLevel = frand2(s1,s2,s3);
}
ZXP(nout) = nextLevel + ( phase * (prevLevel - nextLevel) );
}
}
m_prevlevel = prevLevel;
m_nextlevel = nextLevel;
m_phase = phase;
RPUT;
}
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