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Diffstat (limited to 'sc4pd/source/TExpRand.cpp')
| -rw-r--r-- | sc4pd/source/TExpRand.cpp | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/sc4pd/source/TExpRand.cpp b/sc4pd/source/TExpRand.cpp new file mode 100644 index 0000000..a0087e7 --- /dev/null +++ b/sc4pd/source/TExpRand.cpp @@ -0,0 +1,210 @@ +/* sc4pd + TExpRand, TExpRand~ + + 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: Assif Tsahar: Open Systems + +*/ + +#include "sc4pd.hpp" + + +/* ------------------------ TExpRand~ -------------------------------*/ + +class TExpRand_ar: + public sc4pd_dsp +{ + FLEXT_HEADER(TExpRand_ar,sc4pd_dsp); + +public: + TExpRand_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_bang(); + + void m_sethi(float f) + { + hi = f; + ratio = hi / lo; + } + + void m_setlo(float f) + { + lo = f; + ratio = hi / lo; + } + + void m_seed(int i) + { + rgen.init(i); + } + +private: + float m_sample; + float lo; + float hi; + float ratio; + RGen rgen; + + FLEXT_CALLBACK(m_bang); + FLEXT_CALLBACK_F(m_setlo); + FLEXT_CALLBACK_F(m_sethi); + FLEXT_CALLBACK_I(m_seed); +}; + +FLEXT_LIB_DSP_V("TExpRand~",TExpRand_ar); + +TExpRand_ar::TExpRand_ar(int argc, t_atom *argv) +{ + AtomList Args(argc,argv); + + if (Args.Count() != 2) + { + post("not enough arguments"); + return; + } + lo=sc_getfloatarg(Args,0); + hi=sc_getfloatarg(Args,1); + ratio = hi / lo; + + rgen.init(timeseed()); + + AddOutSignal(); + + FLEXT_ADDBANG(0,m_bang); + FLEXT_ADDMETHOD_(0,"setlo",m_setlo); + FLEXT_ADDMETHOD_(0,"sethi",m_sethi); + FLEXT_ADDMETHOD_(0,"seed",m_seed); +} + +void TExpRand_ar::m_dsp(int n, t_sample *const *in, t_sample *const *out) +{ + m_sample = pow(ratio, rgen.frand()) * lo; +} + + +void TExpRand_ar::m_signal(int n, t_sample *const *in, + t_sample *const *out) +{ + t_sample *nout = *out; + + float sample = m_sample; + + for (int i = 0; i!= n;++i) + { + (*(nout)++) = sample; + } +} + +void TExpRand_ar::m_bang() +{ + m_sample = pow(ratio, rgen.frand()) * lo; +} + +/* ------------------------ TExpRand ---------------------------------*/ + +class TExpRand_kr: + public flext_base +{ + FLEXT_HEADER(TExpRand_kr,flext_base); + +public: + TExpRand_kr(int argc, t_atom *argv); + +protected: + void m_loadbang(); + void m_bang(); + + void m_sethi(float f) + { + hi = f; + ratio = hi / lo; + } + + void m_setlo(float f) + { + lo = f; + ratio = hi / lo; + } + + void m_seed(int i) + { + rgen.init(i); + } + +private: + float lo; + float hi; + float ratio; + RGen rgen; + FLEXT_CALLBACK(m_bang); + FLEXT_CALLBACK_F(m_setlo); + FLEXT_CALLBACK_F(m_sethi); + FLEXT_CALLBACK_I(m_seed); +}; + +FLEXT_LIB_V("TExpRand",TExpRand_kr); + +TExpRand_kr::TExpRand_kr(int argc, t_atom *argv) +{ + AtomList Args(argc,argv); + if (Args.Count() != 2) + { + post("not enough arguments"); + return; + } + lo=sc_getfloatarg(Args,0); + hi=sc_getfloatarg(Args,1); + ratio = hi / lo; + + rgen.init(timeseed()); + + AddOutFloat(); + + FLEXT_ADDBANG(0,m_bang); + FLEXT_ADDMETHOD_(0,"setlo",m_setlo); + FLEXT_ADDMETHOD_(0,"sethi",m_sethi); + FLEXT_ADDMETHOD_(0,"seed",m_seed); +} + +void TExpRand_kr::m_loadbang() +{ + ToOutFloat(0,pow(ratio, rgen.frand()) * lo); +} + +void TExpRand_kr::m_bang() +{ + ToOutFloat(0,pow(ratio, rgen.frand()) * lo); +} |