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/*
VASP modular - vector assembling signal processor / objects for Max/MSP and PD
Copyright (c) 2002 Thomas Grill (xovo@gmx.net)
For information on usage and redistribution, and for a DISCLAIMER OF ALL
WARRANTIES, see the file, "license.txt," in this distribution.
*/
#include "main.h"
#include "ops_feature.h"
#include "oploop.h"
#include "util.h"
#include <math.h>
// --- find peaks
BL higher(S a,S b) { return a > b; }
BL lower(S a,S b) { return a < b; }
/*! \brief Find peaks or valleys (depending on cmp function)
\param rep repetition count
\remark real peak search is mangled into complex domain
\todo how to treat <=, >=
\todo separate real and complex functionality
*/
static BL d_vlpk(OpParam &p,BL cmpf(S a,S b))
{
I dpeaks = (I)(p.frames*p.peaks.density);
if(dpeaks < 1) dpeaks = 1;
I cnt;
do {
cnt = 0;
I i;
S *rdst = p.rddt,*rsrc = p.rsdt;
S *idst = p.iddt,*isrc = p.isdt;
if(!p.peaks.cx || !idst) idst = rdst,p.ids = p.rds;
if(!p.peaks.cx || !isrc) isrc = rsrc,p.iss = p.rss;
// preset sample values
S d1 = -1,d0 = -1,dn = -1;
// search first non-null sample
_D_LOOP(i,p.frames)
if((dn = sqabs(rsrc[i*p.rss],isrc[i*p.iss])) != 0)
break; // non-null -> break!
else
rdst[i*p.rds] = idst[i*p.ids] = 0; // copy null samples to dst
_E_LOOP
// i points to first non-null sample
_D_WHILE(i < p.frames)
// current samples -> previous samples
d1 = d0,d0 = dn;
// save current index
I ci = i;
// search next non-null sample
dn = -1;
while(++i < p.frames)
if((dn = sqabs(rsrc[i*p.rss],isrc[i*p.iss])) != 0) {
break; // non-null -> break!
}
else
rdst[i*p.rds] = idst[i*p.ids] = 0;
if((d1 < 0 || cmpf(d0,d1)) && (dn < 0 || cmpf(d0,dn))) {
// is peak/valley
rdst[ci*p.rds] = rsrc[ci*p.rss];
idst[ci*p.ids] = isrc[ci*p.iss];
++cnt;
}
else
rdst[ci*p.rds] = idst[ci*p.ids] = 0;
_E_WHILE
} while(cnt > dpeaks);
p.peaks.density = p.frames?(R)cnt/p.frames:(cnt?1:0);
return true;
}
inline BL d_peaks(OpParam &p) { return d_vlpk(p,higher); }
inline BL d_valleys(OpParam &p) { return d_vlpk(p,lower); }
inline BL d_rpeaks(OpParam &p) { return d_vlpk(p,higher); }
inline BL d_rvalleys(OpParam &p) { return d_vlpk(p,lower); }
/*! \brief Finds peaks or valleys in a vasp.
\param arg argument list
\param arg.rep repetition count
\param dst destination vasp (NULL for in-place operation)
\param inv true for valley operation
\return normalized destination vasp
*/
Vasp *VaspOp::m_peaks(OpParam &p,CVasp &src,CVasp *dst,BL inv)
{
Vasp *ret = NULL;
RVecBlock *vecs = GetRVecs(p.opname,src,dst);
if(vecs) {
p.peaks.cx = false;
ret = DoOp(vecs,inv?d_valleys:d_peaks,p);
delete vecs;
}
return ret;
}
/*! \brief Finds peaks or valleys by radius in a complex vasp.
\param arg argument list
\param arg.rep repetition count
\param dst destination vasp (NULL for in-place operation)
\param inv true for valley operation
\return normalized destination vasp
*/
Vasp *VaspOp::m_rpeaks(OpParam &p,CVasp &src,CVasp *dst,BL inv)
{
Vasp *ret = NULL;
CVecBlock *vecs = GetCVecs(p.opname,src,dst);
if(vecs) {
p.peaks.cx = true;
ret = DoOp(vecs,inv?d_rvalleys:d_rpeaks,p);
delete vecs;
}
return ret;
}
class vasp_peaks:
public vasp_anyop
{
FLEXT_HEADER(vasp_peaks,vasp_anyop)
public:
vasp_peaks(I argc,const t_atom *argv):
vasp_anyop(argc,argv,VASP_ARG(),true,XletCode(xlet_float,0))
{}
virtual Vasp *do_peaks(OpParam &p)
{
CVasp cdst(dst),cref(ref);
return VaspOp::m_peaks(p,cref,&cdst);
}
virtual Vasp *tx_work(const Argument &arg)
{
OpParam p(thisName(),0);
if(arg.IsList() && arg.GetList().Count() >= 1 && CanbeFloat(arg.GetList()[0])) {
p.peaks.density = GetAFloat(arg.GetList()[0]);
}
else {
if(!arg.IsNone()) post("%s - invalid density argument -> set to 1",p.opname);
p.peaks.density = 1;
}
Vasp *ret = do_peaks(p);
ToOutFloat(1,p.peaks.density);
return ret;
}
};
FLEXT_LIB_V("vasp, vasp.peaks",vasp_peaks)
class vasp_valleys:
public vasp_peaks
{
FLEXT_HEADER(vasp_valleys,vasp_peaks)
public:
vasp_valleys(I argc,const t_atom *argv): vasp_peaks(argc,argv) {}
virtual Vasp *do_peaks(OpParam &p)
{
CVasp cdst(dst),cref(ref);
return VaspOp::m_valleys(p,cref,&cdst);
}
};
FLEXT_LIB_V("vasp, vasp.valleys",vasp_valleys)
class vasp_rpeaks:
public vasp_peaks
{
FLEXT_HEADER(vasp_rpeaks,vasp_peaks)
public:
vasp_rpeaks(I argc,const t_atom *argv): vasp_peaks(argc,argv) {}
virtual Vasp *do_peaks(OpParam &p)
{
CVasp cdst(dst),cref(ref);
return VaspOp::m_rpeaks(p,cref,&cdst);
}
};
FLEXT_LIB_V("vasp, vasp.rpeaks",vasp_rpeaks)
class vasp_rvalleys:
public vasp_peaks
{
FLEXT_HEADER(vasp_rvalleys,vasp_peaks)
public:
vasp_rvalleys(I argc,const t_atom *argv): vasp_peaks(argc,argv) {}
virtual Vasp *do_peaks(OpParam &p)
{
CVasp cdst(dst),cref(ref);
return VaspOp::m_rvalleys(p,cref,&cdst);
}
};
FLEXT_LIB_V("vasp, vasp.rvalleys",vasp_rvalleys)
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