Update of /cvsroot/pure-data/externals/sc4pd/source In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv11508/source
Modified Files: main.cpp Added Files: BPF.cpp BRF.cpp Log Message: brf & bpf
Index: main.cpp =================================================================== RCS file: /cvsroot/pure-data/externals/sc4pd/source/main.cpp,v retrieving revision 1.24 retrieving revision 1.25 diff -C2 -d -r1.24 -r1.25 *** main.cpp 8 Aug 2004 11:10:30 -0000 1.24 --- main.cpp 8 Aug 2004 16:29:26 -0000 1.25 *************** *** 65,69 **** " AllpassC~, PitchShift~, Resonz~, OnePole(~), OneZero(~), " "TwoPole~, \n" ! " TwoZero~, FOS(~), SOS~, RLPF~, RHPF~, LPF~, HPF~" "\n" ); --- 65,70 ---- " AllpassC~, PitchShift~, Resonz~, OnePole(~), OneZero(~), " "TwoPole~, \n" ! " TwoZero~, FOS(~), SOS~, RLPF~, RHPF~, LPF~, HPF~, BPF~, " ! "BRF~" "\n" ); *************** *** 258,261 **** --- 259,266 ----
FLEXT_DSP_SETUP(HPF_ar); + + FLEXT_DSP_SETUP(BPF_ar); + + FLEXT_DSP_SETUP(BRF_ar); }
--- NEW FILE: BPF.cpp --- /* sc4pd BPF~
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: Jo Kondo: Works For Piano
*/
#include "sc4pd.hpp"
/* ------------------------ BPF~ -------------------------------*/
class BPF_ar: public sc4pd_dsp { FLEXT_HEADER(BPF_ar,sc4pd_dsp);
public: BPF_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) { mRadiansPerSample = sc_radianspersample(); mFilterSlope = sc_filterslope(); mFilterLoops = sc_filterloops(); mFilterRemain = sc_filterremain(); }
void m_set_freq(float f) { m_freq=f; changed = true; }
void m_set_rq(float f) { m_bw=f; changed = true; }
private: float m_y1, m_y2, m_a0, m_b1, m_b2, m_freq, m_bw; bool changed; float mRadiansPerSample, mFilterSlope; int mFilterLoops, mFilterRemain;
FLEXT_CALLBACK_F(m_set_freq); FLEXT_CALLBACK_F(m_set_rq); };
FLEXT_LIB_DSP_V("BPF~",BPF_ar);
BPF_ar::BPF_ar(int argc, t_atom *argv) { FLEXT_ADDMETHOD_(0,"kfreq",m_set_freq); FLEXT_ADDMETHOD_(0,"krq",m_set_rq);
//parse arguments AtomList Args(argc,argv);
m_freq = sc_getfloatarg(Args,0); m_bw = sc_getfloatarg(Args,1); changed = true;
AddOutSignal();
m_a0 = 0.f; m_b1 = 0.f; m_b2 = 0.f; m_y1 = 0.f; m_y2 = 0.f; }
void BPF_ar::m_signal(int n, t_sample *const *in, t_sample *const *out) { t_sample *nin = *in; t_sample *nout = *out;
float y0; float y1 = m_y1; float y2 = m_y2; float a0 = m_a0; float b1 = m_b1; float b2 = m_b2;
if (changed) { float pfreq = m_freq * mRadiansPerSample; float pbw = m_bw * pfreq * 0.5; float C = 1.f / tan(pbw); float D = 2.f * cos(pfreq); float next_a0 = 1.f / (1.f + C); float next_b1 = C * D * next_a0 ; float next_b2 = (1.f - C) * next_a0; float a0_slope = (next_a0 - a0) * mFilterSlope; float b1_slope = (next_b1 - b1) * mFilterSlope; float b2_slope = (next_b2 - b2) * mFilterSlope; for (int i = 0; i!= mFilterLoops;++i) { y0 = ZXP(nin) + b1 * y1 + b2 * y2; ZXP(nout) = a0 * (y0 - y2); y2 = ZXP(nin) + b1 * y0 + b2 * y1; ZXP(nout) = a0 * (y2 - y1); y1 = ZXP(nin) + b1 * y2 + b2 * y0; ZXP(nout) = a0 * (y1 - y0); a0 += a0_slope; b1 += b1_slope; b2 += b2_slope; } for (int i = 0; i!= mFilterRemain;++i) { y0 = ZXP(nin) + b1 * y1 + b2 * y2; ZXP(nout) = a0 * (y0 - y2); y2 = y1; y1 = y0; } m_a0 = a0; m_b1 = b1; m_b2 = b2; changed = false; } else { for (int i = 0; i!= mFilterLoops;++i) { y0 = ZXP(nin) + b1 * y1 + b2 * y2; ZXP(nout) = a0 * (y0 - y2); y2 = ZXP(nin) + b1 * y0 + b2 * y1; ZXP(nout) = a0 * (y2 - y1); y1 = ZXP(nin) + b1 * y2 + b2 * y0; ZXP(nout) = a0 * (y1 - y0); }
for (int i = 0; i!= mFilterRemain;++i) { y0 = ZXP(nin) + b1 * y1 + b2 * y2; ZXP(nout) = a0 * (y0 - y2); y2 = y1; y1 = y0; } } m_y1 = zapgremlins(y1); m_y2 = zapgremlins(y2); }
/* no control rate BPF filter */
--- NEW FILE: BRF.cpp --- /* sc4pd BRF~
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: Jo Kondo: Works For Piano
*/
#include "sc4pd.hpp"
/* ------------------------ BRF~ -------------------------------*/
class BRF_ar: public sc4pd_dsp { FLEXT_HEADER(BRF_ar,sc4pd_dsp);
public: BRF_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) { mRadiansPerSample = sc_radianspersample(); mFilterSlope = sc_filterslope(); mFilterLoops = sc_filterloops(); mFilterRemain = sc_filterremain(); }
void m_set_freq(float f) { m_freq=f; changed = true; }
void m_set_rq(float f) { m_bw=f; changed = true; }
private: float m_y1, m_y2, m_a0, m_a1, m_b2, m_freq, m_bw; bool changed; float mRadiansPerSample, mFilterSlope; int mFilterLoops, mFilterRemain;
FLEXT_CALLBACK_F(m_set_freq); FLEXT_CALLBACK_F(m_set_rq); };
FLEXT_LIB_DSP_V("BRF~",BRF_ar);
BRF_ar::BRF_ar(int argc, t_atom *argv) { FLEXT_ADDMETHOD_(0,"kfreq",m_set_freq); FLEXT_ADDMETHOD_(0,"krq",m_set_rq);
//parse arguments AtomList Args(argc,argv);
m_freq = sc_getfloatarg(Args,0); m_bw = sc_getfloatarg(Args,1); changed = true;
AddOutSignal();
m_a0 = 0.f; m_a1 = 0.f; m_b2 = 0.f; m_y1 = 0.f; m_y2 = 0.f; }
void BRF_ar::m_signal(int n, t_sample *const *in, t_sample *const *out) { t_sample *nin = *in; t_sample *nout = *out;
float ay; float y0; float y1 = m_y1; float y2 = m_y2; float a0 = m_a0; float a1 = m_a1; float b2 = m_b2;
if (changed) { float pfreq = m_freq * mRadiansPerSample; float pbw = m_bw * pfreq * 0.5; float C = tan(pbw); float D = 2.f * cos(pfreq); float next_a0 = 1.f / (1.f + C); float next_a1 = -D * next_a0; float next_b2 = (1.f - C) * next_a0; float a0_slope = (next_a0 - a0) * mFilterSlope; float a1_slope = (next_a1 - a1) * mFilterSlope; float b2_slope = (next_b2 - b2) * mFilterSlope; for (int i = 0; i!= mFilterLoops;++i) { ay = a1 * y1; y0 = ZXP(nin) - ay - b2 * y2; ZXP(nout) = a0 * (y0 + y2) + ay; ay = a1 * y0; y2 = ZXP(nin) - ay - b2 * y1; ZXP(nout) = a0 * (y2 + y1) + ay; ay = a1 * y2; y1 = ZXP(nin) - ay - b2 * y0; ZXP(nout) = a0 * (y1 + y0) + ay; a0 += a0_slope; a1 += a1_slope; b2 += b2_slope; } for (int i = 0; i!= mFilterRemain;++i) { ay = a1 * y1; y0 = ZXP(nin) - ay - b2 * y2; ZXP(nout) = a0 * (y0 + y2) + ay; y2 = y1; y1 = y0; } m_a0 = a0; m_a1 = a1; m_b2 = b2; changed = false; } else { for (int i = 0; i!= mFilterLoops;++i) { ay = a1 * y1; y0 = ZXP(nin) - ay - b2 * y2; ZXP(nout) = a0 * (y0 + y2) + ay; ay = a1 * y0; y2 = ZXP(nin) - ay - b2 * y1; ZXP(nout) = a0 * (y2 + y1) + ay; ay = a1 * y2; y1 = ZXP(nin) - ay - b2 * y0; ZXP(nout) = a0 * (y1 + y0) + ay; }
for (int i = 0; i!= mFilterRemain;++i) { ay = a1 * y1; y0 = ZXP(nin) - ay - b2 * y2; ZXP(nout) = a0 * (y0 + y2) + ay; y2 = y1; y1 = y0; } } m_y1 = zapgremlins(y1); m_y2 = zapgremlins(y2); }
/* no control rate BRF filter */
-
Tim Blechmann