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/* sc4pd
DelayC~
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: Tom Cora: Halleluja, Anyway
*/
#include "sc4pd.hpp"
#include "DelayUnit.hpp"
class DelayC_ar : private DelayUnit_ar
{
FLEXT_HEADER(DelayC_ar,DelayUnit_ar);
DelayC_ar (int argc, t_atom *argv);
~DelayC_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)
{
changed = false;
DelayUnit_Reset();
}
void m_set(float f)
{
m_delaytime=f;
changed = true;
}
private:
bool changed;
DEFSIGCALL(m_signal_fun);
DEFSIGFUN(m_signal_);
DEFSIGFUN(m_signal_z);
FLEXT_CALLBACK_F(m_set);
};
FLEXT_LIB_DSP_V("DelayC~",DelayC_ar);
DelayC_ar::DelayC_ar (int argc, t_atom *argv)
{
FLEXT_ADDMETHOD_(0,"delaytime",m_set);
//parse arguments
AtomList Args(argc,argv);
if (Args.Count() != 2)
{
post("2 arguments are needed");
return;
}
m_delaytime = sc_getfloatarg(Args,0);
m_maxdelaytime = sc_getfloatarg(Args,1);
SETSIGFUN(m_signal_fun,SIGFUN(m_signal_z));
AddOutSignal();
}
DelayC_ar::~DelayC_ar ()
{
DelayUnit_Dtor();
}
void DelayC_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;
long mask = m_mask;
float d0, d1, d2, d3;
if (changed)
{
float next_dsamp = CalcDelay(m_delaytime);
float dsamp_slope = CALCSLOPE(next_dsamp, dsamp);
for (int i = 0; i!= n;++i)
{
dsamp += dsamp_slope;
long idsamp = (long)dsamp;
float frac = dsamp - idsamp;
long irdphase1 = iwrphase - idsamp;
long irdphase2 = irdphase1 - 1;
long irdphase3 = irdphase1 - 2;
long irdphase0 = irdphase1 + 1;
dlybuf[iwrphase & mask] = ZXP(nin);
if (irdphase0 < 0)
{
ZXP(nout) = 0.f;
}
else
{
if (irdphase1 < 0)
{
d1 = d2 = d3 = 0.f;
d0 = dlybuf[irdphase0 & mask];
}
else if (irdphase2 < 0)
{
d1 = d2 = d3 = 0.f;
d0 = dlybuf[irdphase0 & mask];
d1 = dlybuf[irdphase1 & mask];
}
else if (irdphase3 < 0)
{
d3 = 0.f;
d0 = dlybuf[irdphase0 & mask];
d1 = dlybuf[irdphase1 & mask];
d2 = dlybuf[irdphase2 & mask];
}
else
{
d0 = dlybuf[irdphase0 & mask];
d1 = dlybuf[irdphase1 & mask];
d2 = dlybuf[irdphase2 & mask];
d3 = dlybuf[irdphase3 & mask];
}
ZXP(nout) = cubicinterp(frac, d0, d1, d2, d3);
}
iwrphase++;
}
m_dsamp = dsamp;
changed = false;
}
else
{
long idsamp = (long)dsamp;
float frac = dsamp - idsamp;
for (int i = 0; i!= n;++i)
{
long irdphase1 = iwrphase - idsamp;
long irdphase2 = irdphase1 - 1;
long irdphase3 = irdphase1 - 2;
long irdphase0 = irdphase1 + 1;
dlybuf[iwrphase & mask] = ZXP(nin);
if (irdphase0 < 0)
{
ZXP(nout) = 0.f;
}
else
{
if (irdphase1 < 0)
{
d1 = d2 = d3 = 0.f;
d0 = dlybuf[irdphase0 & mask];
}
else if (irdphase2 < 0)
{
d1 = d2 = d3 = 0.f;
d0 = dlybuf[irdphase0 & mask];
d1 = dlybuf[irdphase1 & mask];
}
else if (irdphase3 < 0)
{
d3 = 0.f;
d0 = dlybuf[irdphase0 & mask];
d1 = dlybuf[irdphase1 & mask];
d2 = dlybuf[irdphase2 & mask];
}
else
{
d0 = dlybuf[irdphase0 & mask];
d1 = dlybuf[irdphase1 & mask];
d2 = dlybuf[irdphase2 & mask];
d3 = dlybuf[irdphase3 & mask];
}
ZXP(nout) = cubicinterp(frac, d0, d1, d2, d3);
}
iwrphase++;
}
}
m_iwrphase = iwrphase;
m_numoutput += n;
if (m_numoutput >= m_idelaylen)
{
SETSIGFUN(m_signal_fun,SIGFUN(m_signal_));
}
}
void DelayC_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;
long mask = m_mask;
if (changed)
{
float next_dsamp = CalcDelay(m_delaytime);
float dsamp_slope = CALCSLOPE(next_dsamp, dsamp);
for (int i = 0; i!= n;++i)
{
dlybuf[iwrphase & mask] = ZXP(nin);
dsamp += dsamp_slope;
long idsamp = (long)dsamp;
float frac = dsamp - idsamp;
long irdphase1 = iwrphase - idsamp;
long irdphase2 = irdphase1 - 1;
long irdphase3 = irdphase1 - 2;
long irdphase0 = irdphase1 + 1;
float d0 = dlybuf[irdphase0 & mask];
float d1 = dlybuf[irdphase1 & mask];
float d2 = dlybuf[irdphase2 & mask];
float d3 = dlybuf[irdphase3 & mask];
ZXP(nout) = cubicinterp(frac, d0, d1, d2, d3);
iwrphase++;
}
m_dsamp = dsamp;
changed = false;
}
else
{
long idsamp = (long)dsamp;
float frac = dsamp - idsamp;
for (int i = 0; i!= n;++i)
{
dlybuf[iwrphase & mask] = ZXP(nin);
long irdphase1 = iwrphase - idsamp;
long irdphase2 = irdphase1 - 1;
long irdphase3 = irdphase1 - 2;
long irdphase0 = irdphase1 + 1;
float d0 = dlybuf[irdphase0 & mask];
float d1 = dlybuf[irdphase1 & mask];
float d2 = dlybuf[irdphase2 & mask];
float d3 = dlybuf[irdphase3 & mask];
ZXP(nout) = cubicinterp(frac, d0, d1, d2, d3);
iwrphase++;
}
}
m_iwrphase = iwrphase;
}
/* todo: DelayC for control rate ? */
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