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/*
xsample - extended sample objects for Max/MSP and pd (pure data)
Copyright (c) 2001-2011 Thomas Grill (gr@grrrr.org)
For information on usage and redistribution, and for a DISCLAIMER OF ALL
WARRANTIES, see the file, "license.txt," in this distribution.
$LastChangedRevision: 39 $
$LastChangedDate$
$LastChangedBy$
*/
#ifndef __INTER_H
#define __INTER_H
TMPLDEF void xinter::st_play0(const Element *,const int ,const int ,const int n,const int inchns,const int outchns,t_sample *const *invecs,t_sample *const *outvecs,bool looped)
{
// stopped/invalid buffer -> output zero
for(int ci = 0; ci < outchns; ++ci) ZeroSamples(outvecs[ci],n);
}
TMPLDEF void xinter::st_play1(const Element *bdt,const int smin,const int smax,const int n,const int inchns,const int outchns,t_sample *const *invecs,t_sample *const *outvecs,bool looped)
{
SIGCHNS(BCHNS,inchns,OCHNS,outchns);
// position info are frame units
const t_sample *pos = invecs[0];
t_sample *const *sig = outvecs;
// no interpolation
// ----------------
if(UNLIKELY(smin == smax)) {
// zero loop length -> assume that smin is a valid sample position...
int ci;
for(ci = 0; ci < OCHNS; ++ci) SetSamples(sig[ci],n,bdt[smin*BCHNS]);
// clear rest of output channels (if buffer has less channels)
for(; ci < outchns; ++ci) ZeroSamples(sig[ci],n);
}
else if(OCHNS == 1) {
t_sample *sig0 = sig[0];
for(int i = 0; i < n; ++i) {
register long oint = CASTINT<long>(*(pos++));
// for xplay oint can be out of bounds -> check
if(LIKELY(oint >= smin))
if(LIKELY(oint < smax)) {
// normal
*(sig0++) = bdt[oint*BCHNS];
}
else {
// position > last sample ... take only last sample
*(sig0++) = bdt[(smax-1)*BCHNS];
}
else {
// position < 0 ... take only 0th sample
*(sig0++) = bdt[smin*BCHNS];
}
}
}
else {
for(int i = 0,si = 0; i < n; ++i,++si) {
register long oint = CASTINT<long>(*(pos++));
register const Element *fp;
// for xplay oint can be out of bounds -> check
if(LIKELY(oint >= smin))
if(LIKELY(oint < smax)) {
// normal
fp = bdt+oint*BCHNS;
}
else {
// position > last sample ... take only last sample
fp = bdt+(smax-1)*BCHNS;
}
else {
// position < 0 ... take only 0th sample
fp = bdt+smin*BCHNS;
}
for(int ci = 0; ci < OCHNS; ++ci)
sig[ci][si] = fp[ci];
}
// clear rest of output channels (if buffer has less channels)
for(int ci = OCHNS; ci < outchns; ++ci) ZeroSamples(sig[ci],n);
}
}
TMPLDEF void xinter::st_play2(const Element *bdt,const int smin,const int smax,const int n,const int inchns,const int outchns,t_sample *const *invecs,t_sample *const *outvecs,bool looped)
{
const int plen = smax-smin;
if(UNLIKELY(plen < 2)) {
st_play1 TMPLCALL (bdt,smin,smax,n,inchns,outchns,invecs,outvecs,looped);
return;
}
SIGCHNS(BCHNS,inchns,OCHNS,outchns);
// position info are frame units
const t_sample *pos = invecs[0];
t_sample *const *sig = outvecs;
// linear interpolation
// --------------------
const int maxo = smax-1; // last sample in buffer
if(OCHNS == 1) {
t_sample *sig0 = sig[0];
for(int i = 0; i < n; ++i) {
const float o = *(pos++);
register long oint = CASTINT<long>(o);
const float frac = o-oint;
t_sample fp0,fp1;
if(LIKELY(oint >= smin))
if(LIKELY(oint < maxo)) {
// normal interpolation
fp0 = bdt[oint*BCHNS];
fp1 = bdt[(oint+1)*BCHNS];
}
else {
// position is past last sample
if(looped) {
oint = smin+(oint-smin)%plen;
fp0 = bdt[oint*BCHNS];
fp1 = oint >= maxo?t_sample(bdt[smin]):fp0;
}
else
fp0 = fp1 = bdt[maxo*BCHNS];
}
else {
// position is before first sample
if(looped) {
oint = smax-(smin-oint)%plen;
fp0 = bdt[oint*BCHNS];
fp1 = oint >= maxo?t_sample(bdt[smin]):fp0;
}
else
fp0 = fp1 = bdt[smin*BCHNS];
}
*(sig0++) = fp0+frac*(fp1-fp0);
}
}
else {
for(int i = 0,si = 0; i < n; ++i,++si) {
const float o = *(pos++);
register long oint = CASTINT<long>(o);
const Element *fp0,*fp1;
const float frac = o-oint;
if(LIKELY(oint >= smin))
if(LIKELY(oint < maxo)) {
// normal interpolation
fp0 = bdt+oint*BCHNS;
fp1 = fp0+BCHNS;
}
else {
// position is past last sample
if(looped) {
oint = smin+(oint-smin)%plen;
fp0 = bdt+oint*BCHNS;
fp1 = oint >= maxo?bdt+smin:fp0;
}
else
fp0 = fp1 = bdt+maxo*BCHNS;
}
else {
// position is before first sample
if(looped) {
oint = smax-(smin-oint)%plen;
fp0 = bdt+oint*BCHNS;
fp1 = oint >= maxo?bdt+smin:fp0;
}
else
fp0 = fp1 = bdt+smin*BCHNS;
}
for(int ci = 0; ci < OCHNS; ++ci)
sig[ci][si] = fp0[ci]+frac*(fp1[ci]-fp0[ci]);
}
// clear rest of output channels (if buffer has less channels)
for(int ci = OCHNS; ci < outchns; ++ci) ZeroSamples(sig[ci],n);
}
}
TMPLDEF void xinter::st_play4(const Element *bdt,const int smin,const int smax,const int n,const int inchns,const int outchns,t_sample *const *invecs,t_sample *const *outvecs,bool looped)
{
const int plen = smax-smin; //curlen;
if(UNLIKELY(plen < 4)) {
if(plen < 2) st_play1 TMPLCALL (bdt,smin,smax,n,inchns,outchns,invecs,outvecs,looped);
else st_play2 TMPLCALL (bdt,smin,smax,n,inchns,outchns,invecs,outvecs,looped);
return;
}
SIGCHNS(BCHNS,inchns,OCHNS,outchns);
// position info are frame units
const t_sample *pos = invecs[0];
t_sample *const *sig = outvecs;
// 4-point interpolation
// ---------------------
const int maxo = smax-1; // last sample in play region
if(OCHNS == 1) {
t_sample *sig0 = sig[0];
for(int i = 0; i < n; ++i) {
float o = pos[i];
register long oint = CASTINT<long>(o);
register t_sample fa,fb,fc,fd;
const float frac = o-oint;
register const Element *ptr = bdt+oint*BCHNS;
if(LIKELY(oint > smin)) {
if(LIKELY(oint < maxo-2)) {
// normal case
fa = ptr[-BCHNS];
fb = ptr[0];
fc = ptr[BCHNS];
fd = ptr[BCHNS*2];
}
else {
// not enough space at the end
if(looped) {
// normalize position
oint = smin+(oint-smin)%plen;
goto looped1;
}
else {
// last sample is outside in any case
fd = bdt[maxo*BCHNS];
if(oint-1 >= maxo)
// if first is outside, all are outside
fa = fb = fc = fd;
else {
fa = ptr[-BCHNS];
if(oint >= maxo)
fb = fc = fd;
else {
fb = ptr[0];
fc = oint+1 < maxo?static_cast<t_sample>(ptr[BCHNS]):fd;
}
}
}
}
}
else {
// not enough space at the beginning
if(looped) {
// normalize position
oint = smax-(smin-oint)%plen;
looped1:
ptr = bdt+oint*BCHNS;
// inside in any case
fb = ptr[0];
if(oint < maxo-1) {
fa = oint > smin?ptr[-BCHNS]:bdt[maxo*BCHNS];
fc = ptr[BCHNS];
fd = ptr[BCHNS*2];
}
else {
fa = ptr[-BCHNS];
fc = oint < maxo?ptr[BCHNS]:ptr[(1-plen)*BCHNS];
fd = ptr[(2-plen)*BCHNS];
}
}
else {
// first sample is outside in any case
fa = bdt[smin*BCHNS];
if(oint+2 < smin)
// if last is outside, all are outside
fb = fc = fd = fa;
else {
fd = ptr[BCHNS*2];
if(oint+1 < smin)
fb = fc = fa;
else {
fc = ptr[BCHNS];
fb = oint < smin?fa:static_cast<t_sample>(ptr[0]);
}
}
}
}
const float f1 = frac*0.5f-0.5f;
const float f3 = frac*3.0f-1.0f;
const float amdf = (fa-fd)*frac;
const float cmb = fc-fb;
const float bma = fb-fa;
sig0[i] = fb + frac*( cmb - f1 * ( amdf+bma+cmb*f3 ) );
}
}
else {
for(int i = 0,si = 0; i < n; ++i,++si) {
float o = *(pos++);
register long oint = CASTINT<long>(o);
const float frac = o-oint;
register const Element *ptr = bdt+oint*BCHNS;
register const Element *fa,*fb,*fc,*fd;
if(LIKELY(oint > smin))
if(LIKELY(oint < maxo-2)) {
// normal case
fb = ptr;
fa = fb-BCHNS;
fc = fb+BCHNS;
fd = fc+BCHNS;
}
else {
// not enough space at the end
if(looped) {
// normalize position
oint = smin+(oint-smin)%plen;
goto looped2;
}
else {
// last sample is outside in any case
fd = bdt+maxo*BCHNS;
if(oint-1 >= maxo)
// if first is outside, all are outside
fa = fb = fc = fd;
else {
fa = ptr-BCHNS;
if(oint >= maxo)
fb = fc = fd;
else {
fb = ptr;
fc = oint+1 < maxo?ptr+BCHNS:fd;
}
}
}
}
else {
// not enough space at the beginning
if(looped) {
// normalize position
oint = smax-(smin-oint)%plen;
looped2:
// inside in any case
fb = bdt+oint*BCHNS;
if(oint < maxo-1) {
fa = oint > smin?fb-BCHNS:bdt+maxo*BCHNS;
fc = fb+BCHNS;
fd = fc+BCHNS;
}
else {
fa = fb-BCHNS;
fc = oint < maxo?fb+BCHNS:bdt+(oint-plen+1)*BCHNS;
fd = bdt+(oint-plen+2)*BCHNS;
}
}
else {
// first sample is outside in any case
fa = bdt+smin*BCHNS;
if(oint+2 < smin)
// if last is outside, all are outside
fb = fc = fd = fa;
else {
fd = ptr+BCHNS*2;
if(oint+1 < smin)
fb = fc = fa;
else {
fc = ptr+BCHNS;
fb = oint < smin?fa:ptr;
}
}
}
}
const float f1 = 0.5f*(frac-1.0f);
const float f3 = frac*3.0f-1.0f;
for(int ci = 0; ci < OCHNS; ++ci) {
const float amdf = (fa[ci]-fd[ci])*frac;
const float cmb = fc[ci]-fb[ci];
const float bma = fb[ci]-fa[ci];
sig[ci][si] = fb[ci] + frac*( cmb - f1 * ( amdf+bma+cmb*f3 ) );
}
}
// clear rest of output channels (if buffer has less channels)
for(int ci = OCHNS; ci < outchns; ++ci) ZeroSamples(sig[ci],n);
}
}
TMPLDEF inline void xinter::s_play0(int n,t_sample *const *invecs,t_sample *const *outvecs)
{
st_play0 TMPLCALL (buf.Data(),curmin,curmax,n,buf.Channels(),outchns,invecs,outvecs,loopmode == xsl_loop);
}
TMPLDEF inline void xinter::s_play1(int n,t_sample *const *invecs,t_sample *const *outvecs)
{
st_play1 TMPLCALL (buf.Data(),curmin,curmax,n,buf.Channels(),outchns,invecs,outvecs,loopmode == xsl_loop);
}
TMPLDEF inline void xinter::s_play2(int n,t_sample *const *invecs,t_sample *const *outvecs)
{
st_play2 TMPLCALL (buf.Data(),curmin,curmax,n,buf.Channels(),outchns,invecs,outvecs,loopmode == xsl_loop);
}
TMPLDEF inline void xinter::s_play4(int n,t_sample *const *invecs,t_sample *const *outvecs)
{
st_play4 TMPLCALL (buf.Data(),curmin,curmax,n,buf.Channels(),outchns,invecs,outvecs,loopmode == xsl_loop);
}
#endif
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