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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_flt.h"
#include "opdefs.h"
#include "util.h"
// --- highpass ---------------------------------------
//! \todo handle carry
//! \todo handle yield
BL VecOp::d_fhp(OpParam &p)
{
if(p.revdir)
post("%s - reversing operation direction due to overlap: opposite sample delay",p.opname);
/*
R coef = (2*PI)/perln;
if(coef > 1) coef = 1;
*/
const R coef = 1-p.flt.coef;
const I arep = abs(p.flt.rep);
S *src = p.rsdt,*dst = p.rddt;
for(I ti = 0; ti < arep; ++ti) {
register S v1;
I i;
// t+ direction
for(i = 0,v1 = 0; i < p.frames; ++i) {
register const S v0 = *src + coef*v1;
*dst = v0-v1;
v1 = v0;
src += p.rss,dst += p.rds;
}
if(p.flt.rep < 0) {
if(++ti == arep) break;
// t- direction
for(i = p.frames-1,v1 = 0; i >= 0; --i) {
src -= p.rss,dst -= p.rds;
register const S v0 = *src + coef*v1;
*dst = v0-v1;
v1 = v0;
}
}
}
return true;
}
// --- lowpass ---------------------------------------
//! \todo handle carry
//! \todo handle yield
BL VecOp::d_flp(OpParam &p)
{
if(p.revdir)
post("%s - reversing operation direction due to overlap: opposite sample delay",p.opname);
/*
R coef = (2*PI)/perln;
if(coef > 1) coef = 1;
*/
const R coef = p.flt.coef,feed = 1-coef;
const I arep = abs(p.flt.rep);
for(I ti = 0; ti < arep; ++ti) {
register S v1;
I i;
S *src = p.rsdt,*dst = p.rddt;
// t+ direction
for(i = 0,v1 = 0; i < p.frames; ++i) {
v1 = *dst = coef* *src + feed*v1;
src += p.rss,dst += p.rds;
}
if(p.flt.rep < 0) {
if(++ti == arep) break;
// t- direction
for(i = p.frames-1,v1 = 0; i >= 0; --i) {
src -= p.rss,dst -= p.rds;
v1 = *dst = coef* *src + feed*v1;
}
}
}
return true;
}
Vasp *VaspOp::m_fhp(OpParam &p,Vasp &src,const Argument &arg,Vasp *dst,BL hp)
{
Vasp *ret = NULL;
if(arg.IsList() && arg.GetList().Count() >= 1) {
RVecBlock *vecs = GetRVecs(p.opname,src,dst);
if(vecs) {
p.flt.coef = 2*PI/flext::GetAFloat(arg.GetList()[0]);
if(p.flt.coef > 1) p.flt.coef = 1;
p.flt.rep = arg.GetList().Count() >= 2?flext::GetAInt(arg.GetList()[1]):1;
p.flt.rep = -p.flt.rep; // fwd/bwd operation
/*
if(p.SROvr()) {
p.SDRRev();
post("%s - reversing operation direction due to overlap: opposite sample delay",opnm);
}
*/
ret = DoOp(vecs,hp?VecOp::d_fhp:VecOp::d_flp,p);
delete vecs;
}
}
return ret;
}
VASP_ANYOP("vasp.flp",flp,1,true,VASP_ARG(),"Passive low pass filter")
VASP_ANYOP("vasp.fhp",fhp,1,true,VASP_ARG(),"Passive high pass filter")
// --- integrate/differentiate
/*! \brief Integration
\remark The delay of the result is +/- one sample, depending on the direction of the calculation
\todo different modes how to initialize first carry?
\todo repetition count
*/
BL VecOp::d_int(OpParam &p)
{
if(p.revdir)
post("%s - reversed operation direction due to overlap: opposite sample delay",p.opname);
register S d = p.intdif.carry;
register I i;
_D_LOOP(i,p.frames)
*p.rddt = (d += *p.rsdt);
p.rsdt += p.rss,p.rddt += p.rds;
_E_LOOP
p.intdif.carry = d;
return true;
}
/*! \brief Differentiation
\remark The delay of the result is +/- one sample, depending on the direction of the calculation
\todo different modes how to initialize first carry?
\todo repetition count
*/
BL VecOp::d_dif(OpParam &p)
{
if(p.revdir)
post("%s - reversed operation direction due to overlap: opposite sample delay",p.opname);
register S d = p.intdif.carry;
register I i;
_D_LOOP(i,p.frames)
register S d1 = *p.rsdt;
*p.rddt = d1-d,d = d1;
p.rsdt += p.rss,p.rddt += p.rds;
_E_LOOP
p.intdif.carry = d;
return true;
}
/*! \brief Does vasp integration/differentiation.
\param arg argument list
\param dst destination vasp (NULL for in-place operation)
\param inv true for differentiation
\return normalized destination vasp
*/
Vasp *VaspOp::m_int(OpParam &p,Vasp &src,const Argument &arg,Vasp *dst,BL inv)
{
Vasp *ret = NULL;
RVecBlock *vecs = GetRVecs(p.opname,src,dst);
if(vecs) {
p.intdif.carry = 0,p.intdif.rep = 1;
if(arg.IsList() && arg.GetList().Count() >= 1) p.intdif.rep = flext::GetAInt(arg.GetList()[0]);
if(p.intdif.rep < 0) {
post("%s - invalid repetition count (%i) -> set to 1",p.opname,p.intdif.rep);
p.intdif.rep = 1;
}
ret = DoOp(vecs,inv?VecOp::d_dif:VecOp::d_int,p);
delete vecs;
}
return ret;
}
VASP_ANYOP("vasp.int",int,0,true,VASP_ARG_I(1),"Integration")
VASP_ANYOP("vasp.dif",dif,0,true,VASP_ARG_I(1),"Differentiation")
/*! \brief Bashes denormals and NANs to zero
\param arg argument list
\param dst destination vasp (NULL for in-place operation)
\return normalized destination vasp
*/
template<class T> inline V f_fix(T &v,T a)
{
if(a != a) // NAN
v = 0;
else {
// denormal bashing (doesn't propagate to the next stage)
static const F anti_denormal = 1e-18F;
a += anti_denormal;
a -= anti_denormal;
v = a;
}
}
BL VecOp::d_fix(OpParam &p) { D__run(f_fix<S>,p); }
VASP_UNARY("vasp.fix",fix,true,"Bashes denormals/NANs to zero")
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