From dfed9bb41f3da99644213f11edbef530b2df1ee2 Mon Sep 17 00:00:00 2001 From: Tim Blechmann Date: Wed, 4 Aug 2004 16:46:55 +0000 Subject: *** empty log message *** svn path=/trunk/externals/tb/; revision=1908 --- sc4pd/source/CombL.cpp | 272 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 272 insertions(+) create mode 100644 sc4pd/source/CombL.cpp (limited to 'sc4pd/source/CombL.cpp') diff --git a/sc4pd/source/CombL.cpp b/sc4pd/source/CombL.cpp new file mode 100644 index 0000000..9af21ae --- /dev/null +++ b/sc4pd/source/CombL.cpp @@ -0,0 +1,272 @@ +/* sc4pd + CombL~ + + 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: Butcher/Charles/Doerner: The Contest Of Pleasures + +*/ + +#include "sc4pd.hpp" +#include "DelayUnit.hpp" + +class CombL_ar : public FeedbackDelay_ar +{ + FLEXT_HEADER(CombL_ar,FeedbackDelay_ar); + + CombL_ar (int argc, t_atom *argv); + ~CombL_ar (); + +protected: + virtual void m_signal(int n, t_sample *const *in, t_sample *const *out) + { + m_signal_fun(n,in,out); + } + + virtual void m_dsp(int n, t_sample *const *in, t_sample *const *out) + { + delay_changed = decay_changed = false; + FeedbackDelay_Reset(); + } + + void m_delay(float f) + { + m_delaytime=f; + delay_changed = true; + } + + void m_decay(float f) + { + m_decaytime=f; + decay_changed = true; + } + +private: + bool delay_changed, decay_changed; + DEFSIGCALL(m_signal_fun); + DEFSIGFUN(m_signal_); + DEFSIGFUN(m_signal_z); + + FLEXT_CALLBACK_F(m_delay); + FLEXT_CALLBACK_F(m_decay); +}; + +FLEXT_LIB_DSP_V("CombL~",CombL_ar); + +CombL_ar::CombL_ar (int argc, t_atom *argv) +{ + FLEXT_ADDMETHOD_(0,"delaytime",m_delay); + FLEXT_ADDMETHOD_(0,"decaytime",m_decay); + + //parse arguments + AtomList Args(argc,argv); + + if (Args.Count() != 3) + { + post("3 arguments are needed"); + return; + } + + m_maxdelaytime = sc_getfloatarg(Args,0); + m_delaytime = sc_getfloatarg(Args,1); + m_decaytime = sc_getfloatarg(Args,2); + + SETSIGFUN(m_signal_fun,SIGFUN(m_signal_z)); + + AddOutSignal(); +} + +CombL_ar::~CombL_ar () +{ + DelayUnit_Dtor(); +} + +void CombL_ar::m_signal_z(int n, t_sample *const *in, t_sample *const *out) +{ + t_sample *nin = *in; + t_sample *nout = *out; + + float *dlybuf = m_dlybuf; + long iwrphase = m_iwrphase; + float dsamp = m_dsamp; + float feedbk = m_feedbk; + long mask = m_mask; + + if (delay_changed || decay_changed) + { + float next_dsamp = CalcDelay(m_delaytime); + float dsamp_slope = CALCSLOPE(next_dsamp, dsamp); + + float next_feedbk = CalcFeedback(m_delaytime, m_decaytime); + float feedbk_slope = CALCSLOPE(next_feedbk, feedbk); + + for (int i = 0; i!= n;++i) + { + dsamp += dsamp_slope; + long idsamp = (long)dsamp; + float frac = dsamp - idsamp; + long irdphase = iwrphase - idsamp; + long irdphaseb = irdphase - 1; + + float zin = ZXP(nin); + if (irdphase < 0) + { + dlybuf[iwrphase & mask] = zin; + ZXP(nout) = 0.f; + } + else if (irdphaseb < 0) + { + float d1 = dlybuf[irdphase & mask]; + float value = d1 - frac * d1; + dlybuf[iwrphase & mask] = zin + feedbk * value; + ZXP(nout) = value; + } + else + { + float d1 = dlybuf[irdphase & mask]; + float d2 = dlybuf[irdphaseb & mask]; + float value = lininterp(frac, d1, d2); + dlybuf[iwrphase & mask] = zin + feedbk * value; + ZXP(nout) = value; + } + + feedbk += feedbk_slope; + iwrphase++; + } + m_feedbk = feedbk; + m_dsamp = dsamp; + delay_changed = decay_changed = false; + } + else + { + long idsamp = (long)dsamp; + float frac = dsamp - idsamp; + + for (int i = 0; i!= n;++i) + { + long irdphase = iwrphase - idsamp; + long irdphaseb = irdphase - 1; + + float zin = ZXP(nin); + if (irdphase < 0) + { + dlybuf[iwrphase & mask] = zin; + ZXP(nout) = 0.f; + } + else if (irdphaseb < 0) + { + float d1 = dlybuf[irdphase & mask]; + float value = d1 - frac * d1; + dlybuf[iwrphase & mask] = zin + feedbk * value; + ZXP(nout) = value; + } + else + { + float d1 = dlybuf[irdphase & mask]; + float d2 = dlybuf[irdphaseb & mask]; + float value = lininterp(frac, d1, d2); + dlybuf[iwrphase & mask] = zin + feedbk * value; + ZXP(nout) = value; + } + iwrphase++; + } + + + } + + m_iwrphase = iwrphase; + m_numoutput += n; + if (m_numoutput >= m_idelaylen) + { + SETSIGFUN(m_signal_fun,SIGFUN(m_signal_)); + } +} + +void CombL_ar::m_signal_(int n, t_sample *const *in, t_sample *const *out) +{ + t_sample *nin = *in; + t_sample *nout = *out; + + float *dlybuf = m_dlybuf; + long iwrphase = m_iwrphase; + float dsamp = m_dsamp; + float feedbk = m_feedbk; + long mask = m_mask; + + if(delay_changed || decay_changed) + { + float next_dsamp = CalcDelay(m_delaytime); + float dsamp_slope = CALCSLOPE(next_dsamp, dsamp); + + float next_feedbk = CalcFeedback(m_delaytime, m_decaytime); + float feedbk_slope = CALCSLOPE(next_feedbk, feedbk); + + for(int i=0; i!= n;++i) + { + dsamp += dsamp_slope; + long idsamp = (long)dsamp; + float frac = dsamp - idsamp; + long irdphase = iwrphase - idsamp; + long irdphaseb = irdphase - 1; + float d1 = dlybuf[irdphase & mask]; + float d2 = dlybuf[irdphaseb & mask]; + float value = lininterp(frac, d1, d2); + dlybuf[iwrphase & mask] = ZXP(nin) + feedbk * value; + ZXP(nout) = value; + feedbk += feedbk_slope; + iwrphase++; + } + m_feedbk = feedbk; + m_dsamp = dsamp; + delay_changed = decay_changed = false; + } + else + { + long idsamp = (long)dsamp; + float frac = dsamp - idsamp; + + for(int i=0; i!= n;++i) + { + long irdphase = iwrphase - idsamp; + long irdphaseb = irdphase - 1; + float d1 = dlybuf[irdphase & mask]; + float d2 = dlybuf[irdphaseb & mask]; + float value = lininterp(frac, d1, d2); + dlybuf[iwrphase & mask] = ZXP(nin) + feedbk * value; + ZXP(nout) = value; + iwrphase++; + + } + } + m_iwrphase = iwrphase; +} + +/* todo: CombL for control rate ? */ -- cgit v1.2.1