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Diffstat (limited to 'sc4pd/source/OneZero.cpp')
| -rw-r--r-- | sc4pd/source/OneZero.cpp | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/sc4pd/source/OneZero.cpp b/sc4pd/source/OneZero.cpp new file mode 100644 index 0000000..82c9ad5 --- /dev/null +++ b/sc4pd/source/OneZero.cpp @@ -0,0 +1,200 @@ +/* sc4pd + OneZero, OneZero~ + + 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: Goh Lee Kwang: Internal Pleasures + +*/ + +#include "sc4pd.hpp" + +/* ------------------------ OneZero~ -------------------------------*/ + +class OneZero_ar: + public sc4pd_dsp +{ + FLEXT_HEADER(OneZero_ar,sc4pd_dsp); + +public: + OneZero_ar(int argc, t_atom *argv); + +protected: + virtual void m_signal(int n, t_sample *const *in, t_sample *const *out); + + void m_set(float f) + { + n_b1=f; + changed = true; + } + +private: + float m_b1, m_x1; + float n_b1; + bool changed; + + FLEXT_CALLBACK_F(m_set); +}; + +FLEXT_LIB_DSP_V("OneZero~",OneZero_ar); + +OneZero_ar::OneZero_ar(int argc, t_atom *argv) +{ + FLEXT_ADDMETHOD_(0,"coef",m_set); + + //parse arguments + AtomList Args(argc,argv); + + m_b1 = sc_getfloatarg(Args,0); + + AddOutSignal(); + + m_x1 = 0.f; +} + +void OneZero_ar::m_signal(int n, t_sample *const *in, + t_sample *const *out) +{ + t_sample *nin = *in; + t_sample *nout = *out; + + float b1 = m_b1; + float x1 = m_x1; + + if (changed) + { + m_b1=n_b1; + float b1_slope = CALCSLOPE(m_b1, b1); + if (b1 >= 0.f && m_b1 >= 0) + { + for (int i = 0; i!= n;++i) + { + float x0 = ZXP(nin); + ZXP(nout) = x0 + b1 * (x1 - x0); + x1 = x0; + b1 += b1_slope; + } + } + else if (b1 <= 0.f && m_b1 <= 0) + { + for (int i = 0; i!= n;++i) + { + float x0 = ZXP(nin); + ZXP(nout) = x0 + b1 * (x1 + x0); + x1 = x0; + b1 += b1_slope; + } + } + else + { + for (int i = 0; i!= n;++i) + { + float x0 = ZXP(nin); + ZXP(nout) = (1.f - fabs(b1)) * x0 + b1 * x1; + x1 = x0; + b1 += b1_slope; + } + } + changed = false; + } + else + { + if (b1 >= 0.f) + { + for (int i = 0; i!= n;++i) + { + float x0 = ZXP(nin); + ZXP(nout) = x0 + b1 * (x1 - x0); + x1 = x0; + } + } + else + { + for (int i = 0; i!= n;++i) + { + float x0 = ZXP(nin); + ZXP(nout) = x0 + b1 * (x1 + x0); + x1 = x0; + } + } + } + m_x1 = x1; +} + +/* ------------------------ OneZero ---------------------------------*/ + + +class OneZero_kr: + public flext_base +{ + FLEXT_HEADER(OneZero_kr,flext_base); + +public: + OneZero_kr(int argc, t_atom *argv); + +protected: + void m_perform(float f); + + void m_set(float f) + { + m_b1=f; + } + +private: + float m_b1, m_x1; + + FLEXT_CALLBACK_F(m_set); + FLEXT_CALLBACK_F(m_perform); +}; + + +FLEXT_LIB_V("OneZero",OneZero_kr); + +OneZero_kr::OneZero_kr(int argc, t_atom *argv) +{ + FLEXT_ADDMETHOD(0,m_perform); + FLEXT_ADDMETHOD_(0,"set",m_set); + + AddOutFloat(); + + //parse arguments + AtomList Args(argc,argv); + + m_b1 = sc_getfloatarg(Args,0); + + m_x1=0; +} + +void OneZero_kr::m_perform(float f) +{ + ToOutFloat(0,((1-abs(m_b1))*f)+m_b1*m_x1); + m_x1=f; +} |