Merge branchesHEADsvn2git-headmaster

- abstractions/tb
- externals/tb

1 files changed, 276 insertions, 0 deletions

diff --git a/sc4pd/source/AllpassL.cpp b/sc4pd/source/AllpassL.cpp
new file mode 100644
index 0000000..2353df3
--- /dev/null
+++ b/sc4pd/source/AllpassL.cpp
@@ -0,0 +1,276 @@
+/* sc4pd 
+   AllpassL~
+
+   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: Rashid Ali & Frank Lowe: Duo Exchange
+
+*/
+
+#include "sc4pd.hpp"
+#include "DelayUnit.hpp"
+
+class AllpassL_ar : public FeedbackDelay_ar
+{
+    FLEXT_HEADER(AllpassL_ar,FeedbackDelay_ar);
+
+    AllpassL_ar (int argc, t_atom *argv);
+    ~AllpassL_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("AllpassL~",AllpassL_ar);
+
+AllpassL_ar::AllpassL_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();
+}
+
+AllpassL_ar::~AllpassL_ar ()
+{
+    DelayUnit_Dtor();
+}
+
+void AllpassL_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) = - feedbk * zin; //check: probably a bug = 0?
+	    } 
+	    else if (irdphaseb < 0)
+	    {
+		float d1 = dlybuf[irdphase & mask];
+		float value = d1 - frac * d1;
+		float dwr = zin + feedbk * value;
+		dlybuf[iwrphase & mask] = dwr;
+		ZXP(nout) = value - feedbk * dwr;
+	    }
+	    else
+	    {
+		float d1 = dlybuf[irdphase & mask];
+		float d2 = dlybuf[irdphaseb & mask];
+		float value = lininterp(frac, d1, d2);
+		float dwr = zin + feedbk * value;
+		dlybuf[iwrphase & mask] = dwr;
+		ZXP(nout) = value - feedbk * dwr;
+	    }
+
+	    feedbk += feedbk_slope;
+	    iwrphase++;
+	}
+	m_feedbk = feedbk;
+	m_dsamp = dsamp;
+	delay_changed = decay_changed = false;
+    }
+    else
+    {
+	long idsamp = (long)dsamp;
+	float frac = dsamp - idsamp;
+
+	float zin = ZXP(nin);
+	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) = - feedbk * zin;
+	    }
+	    else if (irdphaseb < 0) 
+	    {
+		float d1 = dlybuf[irdphase & mask];
+		float value = d1 - frac * d1;
+		float dwr = zin + feedbk * value;
+		dlybuf[iwrphase & mask] = dwr;
+		ZXP(nout) = value - feedbk * dwr;
+	    } 
+	    else
+	    {
+		float d1 = dlybuf[irdphase & mask];
+		float d2 = dlybuf[irdphaseb & mask];
+		float value = lininterp(frac, d1, d2);
+		float dwr = zin + feedbk * value;
+		dlybuf[iwrphase & mask] = dwr;
+		ZXP(nout) = value - feedbk * dwr;
+	    }
+	    iwrphase++;
+	}
+    }
+    
+    m_iwrphase = iwrphase;
+    m_numoutput += n;
+    if (m_numoutput >= m_idelaylen)
+    {
+	SETSIGFUN(m_signal_fun,SIGFUN(m_signal_));
+    }
+}
+
+void AllpassL_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);
+	    float dwr = ZXP(nin) + feedbk * value;
+	    dlybuf[iwrphase & mask] = dwr;
+	    ZXP(nout) = value - feedbk * dwr;
+	    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);
+	    float dwr = ZXP(nin) + feedbk * value;
+	    dlybuf[iwrphase & mask] = dwr;
+	    ZXP(nout) = value - feedbk * dwr;
+	    iwrphase++;
+	}
+    }
+    m_iwrphase = iwrphase;
+}
+
+/* todo: AllpassL for control rate ? */