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Diffstat (limited to 'sc4pd/source/LinCong.cpp')
| -rw-r--r-- | sc4pd/source/LinCong.cpp | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/sc4pd/source/LinCong.cpp b/sc4pd/source/LinCong.cpp new file mode 100644 index 0000000..fdead9c --- /dev/null +++ b/sc4pd/source/LinCong.cpp @@ -0,0 +1,211 @@ +/* sc4pd + LinCong, LinCong~ + + 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: Keith Rowe & John Tilbury: Duos For Doris + +*/ + +#include "sc4pd.hpp" + + +/* ------------------------ LinCong~ -------------------------------*/ + +class LinCong_ar: + public sc4pd_dsp +{ + FLEXT_HEADER(LinCong_ar,sc4pd_dsp); + +public: + LinCong_ar(int argc, t_atom *argv); + +protected: + virtual void m_signal(int n, t_sample *const *in, t_sample *const *out); + + void m_set_seed(float f) + { + m_seed = (int)f; + } + + void m_set_mul(float f) + { + m_mul = (int)f; + } + + void m_set_add(float f) + { + m_add = (int)f; + } + + void m_set_mod(float f) + { + m_mod = (int)f; + m_scale = 2/f; //output between -1 and 1 + } + +private: + unsigned int m_seed; //seed + unsigned int m_mul, m_add, m_mod; //parameters + + float m_scale; + + FLEXT_CALLBACK_F(m_set_seed); + FLEXT_CALLBACK_F(m_set_mul); + FLEXT_CALLBACK_F(m_set_add); + FLEXT_CALLBACK_F(m_set_mod); +}; + +FLEXT_LIB_DSP_V("LinCong~",LinCong_ar); + +LinCong_ar::LinCong_ar(int argc, t_atom *argv) +{ + FLEXT_ADDMETHOD_(0,"seed",m_set_seed); + FLEXT_ADDMETHOD_(0,"mul",m_set_mul); + FLEXT_ADDMETHOD_(0,"add",m_set_add); + FLEXT_ADDMETHOD_(0,"mod",m_set_mod); + + //parse arguments + AtomList Args(argc,argv); + if (Args.Count()!=4) + { + post("4 arguments needed"); + } + m_seed = sc_getfloatarg(Args,0); + m_mul = sc_getfloatarg(Args,1); + m_add = sc_getfloatarg(Args,2); + m_set_mod(sc_getfloatarg(Args,3)); + + AddOutSignal(); +} + + +void LinCong_ar::m_signal(int n, t_sample *const *in, + t_sample *const *out) +{ + t_sample *xout = *out; + + + unsigned int seed = m_seed; + unsigned int mul = m_mul; + unsigned int add = m_add; + unsigned int mod = m_mod; + + float scale = m_scale; + + for (int i = 0; i!= n;++i) + { + seed=(seed * mul + add) % mod; + (*(xout)++)=float(seed)*scale - 1; + } + + m_seed = seed; +} + + + +/* ------------------------ LinCong ---------------------------------*/ + +class LinCong_kr: + public flext_base +{ + FLEXT_HEADER(LinCong_kr,flext_base); + +public: + LinCong_kr(int argc, t_atom *argv); + +protected: + void m_perform(); + + void m_set_seed(float f) + { + m_seed = (int)f; + } + + void m_set_mul(float f) + { + m_mul = (int)f; + } + + void m_set_add(float f) + { + m_add = (int)f; + } + + void m_set_mod(float f) + { + m_mod = (int)f; + m_scale = 2/f; //output between -1 and 1 + } + +private: + unsigned int m_seed; //seed + unsigned int m_mul, m_add, m_mod; //parameters + + float m_scale; + + FLEXT_CALLBACK_F(m_set_seed); + FLEXT_CALLBACK_F(m_set_mul); + FLEXT_CALLBACK_F(m_set_add); + FLEXT_CALLBACK_F(m_set_mod); + FLEXT_CALLBACK(m_perform); +}; + + +FLEXT_LIB_V("LinCong",LinCong_kr); + +LinCong_kr::LinCong_kr(int argc, t_atom *argv) +{ + FLEXT_ADDMETHOD_(0,"seed",m_set_seed); + FLEXT_ADDMETHOD_(0,"mul",m_set_mul); + FLEXT_ADDMETHOD_(0,"add",m_set_add); + FLEXT_ADDMETHOD_(0,"mod",m_set_mod); + FLEXT_ADDBANG(0,m_perform); + + //parse arguments + AtomList Args(argc,argv); + if (Args.Count()!=4) + { + post("4 arguments needed"); + } + m_seed = sc_getfloatarg(Args,0); + m_mul = sc_getfloatarg(Args,1); + m_add = sc_getfloatarg(Args,2); + m_set_mod(sc_getfloatarg(Args,3)); + + AddOutFloat(); +} + +void LinCong_kr::m_perform() +{ + m_seed=(m_seed * m_mul + m_add) % m_mod; + ToOutFloat(0,float(m_seed) * m_scale - 1); +} |