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Diffstat (limited to 'sc4pd/source/FOS.cpp')
| -rw-r--r-- | sc4pd/source/FOS.cpp | 258 |
1 files changed, 258 insertions, 0 deletions
diff --git a/sc4pd/source/FOS.cpp b/sc4pd/source/FOS.cpp new file mode 100644 index 0000000..6bd3c26 --- /dev/null +++ b/sc4pd/source/FOS.cpp @@ -0,0 +1,258 @@ +/* sc4pd + FOS, FOS~ + + 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: Susie Ibarra & Assif Tsahar: Home Cookin' + +*/ + +#include "sc4pd.hpp" + +/* ------------------------ FOS~ -------------------------------*/ + +class FOS_ar: + public sc4pd_dsp +{ + FLEXT_HEADER(FOS_ar,sc4pd_dsp); + +public: + FOS_ar(int argc, t_atom *argv); + +protected: + virtual void m_signal(int n, t_sample *const *in, t_sample *const *out) + { + m_signal_fun(n,in,out); + } + + void m_set_a0(float f) + { + next_a0=f; + } + + void m_set_a1(float f) + { + next_a1=f; + } + + void m_set_b1(float f) + { + next_b1=f; + } + + void m_ar() + { + SETSIGFUN(m_signal_fun,SIGFUN(m_signal_ar)); + } + + void m_kr() + { + SETSIGFUN(m_signal_fun,SIGFUN(m_signal_kr)); + } + +private: + float next_a0, next_a1, next_b1; + float m_y1, m_a0, m_a1, m_b1; + + DEFSIGCALL (m_signal_fun); + DEFSIGFUN (m_signal_ar); + DEFSIGFUN (m_signal_kr); + + FLEXT_CALLBACK_F(m_set_a0); + FLEXT_CALLBACK_F(m_set_a1); + FLEXT_CALLBACK_F(m_set_b1); + FLEXT_CALLBACK(m_ar); + FLEXT_CALLBACK(m_kr); +}; + +FLEXT_LIB_DSP_V("FOS~",FOS_ar); + +FOS_ar::FOS_ar(int argc, t_atom *argv) +{ + FLEXT_ADDMETHOD_(0,"a0",m_set_a0); + FLEXT_ADDMETHOD_(0,"a1",m_set_a1); + FLEXT_ADDMETHOD_(0,"b1",m_set_b1); + FLEXT_ADDMETHOD_(0,"ar",m_ar); + FLEXT_ADDMETHOD_(0,"kr",m_kr); + + //parse arguments + AtomList Args(argc,argv); + + if (Args.Count()<3) + { + post("needs at least 3 arguments"); + return; + } + m_a0 = sc_getfloatarg(Args,0); + m_a1 = sc_getfloatarg(Args,1); + m_b1 = sc_getfloatarg(Args,2); + + if(sc_ar(Args)) + { + SETSIGFUN(m_signal_fun,SIGFUN(m_signal_ar)); + AddInSignal(); + AddInSignal(); + AddInSignal(); + AddInSignal(); + } + else // if not given, use control rate + SETSIGFUN(m_signal_fun,SIGFUN(m_signal_kr)); + + AddOutSignal(); + + m_y1 = 0.f; + m_a0 = 0.f; + m_a1 = 0.f; + m_b1 = 0.f; +} + +void FOS_ar::m_signal_ar(int n, t_sample *const *in, + t_sample *const *out) +{ + t_sample *nin = *in; + t_sample *nout = *out; + float *a0 = *(in+1); + float *a1 = *(in+2); + float *b1 = *(in+3); + + float y1 = m_y1; + + for (int i = 0; i!= n;++i) + { + float y0 = ZXP(nin) + ZXP(b1) * y1; + ZXP(nout) = ZXP(a0) * y0 + ZXP(a1) * y1; + y1 = y0; + } + m_y1 = zapgremlins(y1); +} + + +void FOS_ar::m_signal_kr(int n, t_sample *const *in, + t_sample *const *out) +{ + t_sample *nin = *in; + t_sample *nout = *out; + + float y1 = m_y1; + float a0 = m_a0; + float a1 = m_a1; + float b1 = m_b1; + float a0_slope = CALCSLOPE(next_a0, a0); + float a1_slope = CALCSLOPE(next_a1, a1); + float b1_slope = CALCSLOPE(next_b1, b1); + + for (int i = 0; i!= n;++i) + { + float y0 = ZXP(nin) + b1 * y1; + ZXP(nout) = a0 * y0 + a1 * y1; + y1 = y0; + + a0 += a0_slope; + a1 += a1_slope; + b1 += b1_slope; + } +} + +/* ------------------------ FOS ---------------------------------*/ + + +class FOS_kr: + public flext_base +{ + FLEXT_HEADER(FOS_kr,flext_base); + +public: + FOS_kr(int argc, t_atom *argv); + +protected: + void m_perform(float f); + + void m_set_a0(float f) + { + m_a0=f; + } + + void m_set_a1(float f) + { + m_a1=f; + } + + void m_set_b1(float f) + { + m_b1=f; + } + + +private: + float m_y1, m_a0, m_a1, m_b1; + + FLEXT_CALLBACK_F(m_set_a0); + FLEXT_CALLBACK_F(m_set_a1); + FLEXT_CALLBACK_F(m_set_b1); + FLEXT_CALLBACK_F(m_perform); +}; + + +FLEXT_LIB_V("FOS",FOS_kr); + +FOS_kr::FOS_kr(int argc, t_atom *argv) +{ + FLEXT_ADDMETHOD(0,m_perform); + FLEXT_ADDMETHOD_(0,"a0",m_set_a0); + FLEXT_ADDMETHOD_(0,"a1",m_set_a1); + FLEXT_ADDMETHOD_(0,"b1",m_set_b1); + + AddOutFloat(); + + //parse arguments + AtomList Args(argc,argv); + + if (Args.Count()!=3) + { + post("needs 3 arguments"); + return; + } + + m_a0 = sc_getfloatarg(Args,0); + m_a1 = sc_getfloatarg(Args,1); + m_b1 = sc_getfloatarg(Args,2); + + m_y1 = 0.f; + m_a0 = 0.f; + m_a1 = 0.f; + m_b1 = 0.f; +} + +void FOS_kr::m_perform(float f) +{ + m_y1 = m_a0 * (f + m_b1 * m_y1) + m_a1 * m_y1; + ToOutFloat(0,m_y1); +} |