diff options
Diffstat (limited to 'sc4pd/source/LFDNoise2.cpp')
| -rw-r--r-- | sc4pd/source/LFDNoise2.cpp | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/sc4pd/source/LFDNoise2.cpp b/sc4pd/source/LFDNoise2.cpp new file mode 100644 index 0000000..136b1c9 --- /dev/null +++ b/sc4pd/source/LFDNoise2.cpp @@ -0,0 +1,188 @@ +/* sc4pd + LFDNoise2~ + + 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" + + +/* ------------------------ LFDNoise2~ -------------------------------*/ + +class LFDNoise2_ar: + public sc4pd_dsp +{ + FLEXT_HEADER(LFDNoise2_ar,sc4pd_dsp); + +public: + LFDNoise2_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_levela, m_levelb, m_levelc, m_leveld; + float m_phase; + float m_smpdur; + + bool m_ar; + + FLEXT_CALLBACK_I(m_seed); + FLEXT_CALLBACK_F(m_set); +}; + +FLEXT_LIB_DSP_V("LFDNoise2~",LFDNoise2_ar); + +LFDNoise2_ar::LFDNoise2_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()); + + RGET; + + m_phase=0.f; + m_levela = frand2(s1, s2, s3) * 0.8f;// limits max interpol. overshoot to 1. + m_levelb = frand2(s1, s2, s3) * 0.8f; + m_levelc = frand2(s1, s2, s3) * 0.8f; + m_leveld = frand2(s1, s2, s3) * 0.8f; + + RPUT; + + m_ar = sc_ar(Args); + + if (m_ar) + AddInSignal("freqency"); + else + AddInSignal("\"set\" frequency"); + AddOutSignal(); +} + +void LFDNoise2_ar::m_dsp(int n, t_sample *const *in, + t_sample *const *out) +{ + m_smpdur = sc_sampledur(); +} + + +void LFDNoise2_ar::m_signal(int n, t_sample *const *in, + t_sample *const *out) +{ + t_sample *nout = *out; + + float a = m_levela; + float b = m_levelb; + float c = m_levelc; + float d = m_leveld; + + 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); + a = b; + b = c; + c = d; + d = frand2(s1,s2,s3) * 0.8f; // limits max interpol. overshoot to 1. + + } + ZXP(nout) = cubicinterp(1.f - phase, a, b, c, d); + } + } + 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); + a = b; + b = c; + c = d; + d = frand2(s1,s2,s3) * 0.8f; // limits max interpol. overshoot to 1. + } + ZXP(nout) = cubicinterp(1.f - phase, a, b, c, d); + } + } + + + m_phase = phase; + + m_levela = a; + m_levelb = b; + m_levelc = c; + m_leveld = d; + + RPUT; +} + + |