//Function for initializing m_RPSList, a list of TComReferencePictureSet, based on the GOPEntry objects read from the config file.
Void TEncTop::xInitRPS(Bool isFieldCoding)
{
TComReferencePictureSet* rps;
m_cSPS.createRPSList(getGOPSize() + m_extraRPSs + 1);
TComRPSList* rpsList = m_cSPS.getRPSList();
for( Int i = 0; i < getGOPSize()+m_extraRPSs; i++)
{
GOPEntry ge = getGOPEntry(i);
rps = rpsList->getReferencePictureSet(i);
rps->setNumberOfPictures(ge.m_numRefPics);
rps->setNumRefIdc(ge.m_numRefIdc);
Int numNeg = 0;
Int numPos = 0;
for( Int j = 0; j < ge.m_numRefPics; j++)
{
rps->setDeltaPOC(j,ge.m_referencePics[j]);
rps->setUsed(j,ge.m_usedByCurrPic[j]);
if(ge.m_referencePics[j]>0)
{
numPos++;
}
else
{
numNeg++;
}
}
rps->setNumberOfNegativePictures(numNeg);
rps->setNumberOfPositivePictures(numPos);
// handle inter RPS intialization from the config file.
rps->setInterRPSPrediction(ge.m_interRPSPrediction > 0); // not very clean, converting anything > 0 to true.
rps->setDeltaRIdxMinus1(0); // index to the Reference RPS is always the previous one.
TComReferencePictureSet* RPSRef = i>0 ? rpsList->getReferencePictureSet(i-1): NULL; // get the reference RPS
if (ge.m_interRPSPrediction == 2) // Automatic generation of the inter RPS idc based on the RIdx provided.
{
assert (RPSRef!=NULL);
Int deltaRPS = getGOPEntry(i-1).m_POC - ge.m_POC; // the ref POC - current POC
Int numRefDeltaPOC = RPSRef->getNumberOfPictures();
rps->setDeltaRPS(deltaRPS); // set delta RPS
rps->setNumRefIdc(numRefDeltaPOC+1); // set the numRefIdc to the number of pictures in the reference RPS + 1.
Int count=0;
for (Int j = 0; j <= numRefDeltaPOC; j++ ) // cycle through pics in reference RPS.
{
Int RefDeltaPOC = (j<numRefDeltaPOC)? RPSRef->getDeltaPOC(j): 0; // if it is the last decoded picture, set RefDeltaPOC = 0
rps->setRefIdc(j, 0);
for (Int k = 0; k < rps->getNumberOfPictures(); k++ ) // cycle through pics in current RPS.
{
if (rps->getDeltaPOC(k) == ( RefDeltaPOC + deltaRPS)) // if the current RPS has a same picture as the reference RPS.
{
rps->setRefIdc(j, (rps->getUsed(k)?1:2));
count++;
break;
}
}
}
if (count != rps->getNumberOfPictures())
{
printf("Warning: Unable fully predict all delta POCs using the reference RPS index given in the config file. Setting Inter RPS to false for this RPS.\n");
rps->setInterRPSPrediction(0);
}
}
else if (ge.m_interRPSPrediction == 1) // inter RPS idc based on the RefIdc values provided in config file.
{
assert (RPSRef!=NULL);
rps->setDeltaRPS(ge.m_deltaRPS);
rps->setNumRefIdc(ge.m_numRefIdc);
for (Int j = 0; j < ge.m_numRefIdc; j++ )
{
rps->setRefIdc(j, ge.m_refIdc[j]);
}
#if WRITE_BACK
// the following code overwrite the deltaPOC and Used by current values read from the config file with the ones
// computed from the RefIdc. A warning is printed if they are not identical.
numNeg = 0;
numPos = 0;
TComReferencePictureSet RPSTemp; // temporary variable
for (Int j = 0; j < ge.m_numRefIdc; j++ )
{
if (ge.m_refIdc[j])
{
Int deltaPOC = ge.m_deltaRPS + ((j < RPSRef->getNumberOfPictures())? RPSRef->getDeltaPOC(j) : 0);
RPSTemp.setDeltaPOC((numNeg+numPos),deltaPOC);
RPSTemp.setUsed((numNeg+numPos),ge.m_refIdc[j]==1?1:0);
if (deltaPOC<0)
{
numNeg++;
}
else
{
numPos++;
}
}
}
if (numNeg != rps->getNumberOfNegativePictures())
{
printf("Warning: number of negative pictures in RPS is different between intra and inter RPS specified in the config file.\n");
rps->setNumberOfNegativePictures(numNeg);
rps->setNumberOfPictures(numNeg+numPos);
}
if (numPos != rps->getNumberOfPositivePictures())
{
printf("Warning: number of positive pictures in RPS is different between intra and inter RPS specified in the config file.\n");
rps->setNumberOfPositivePictures(numPos);
rps->setNumberOfPictures(numNeg+numPos);
}
RPSTemp.setNumberOfPictures(numNeg+numPos);
RPSTemp.setNumberOfNegativePictures(numNeg);
RPSTemp.sortDeltaPOC(); // sort the created delta POC before comparing
// check if Delta POC and Used are the same
// print warning if they are not.
for (Int j = 0; j < ge.m_numRefIdc; j++ )
{
if (RPSTemp.getDeltaPOC(j) != rps->getDeltaPOC(j))
{
printf("Warning: delta POC is different between intra RPS and inter RPS specified in the config file.\n");
rps->setDeltaPOC(j,RPSTemp.getDeltaPOC(j));
}
if (RPSTemp.getUsed(j) != rps->getUsed(j))
{
printf("Warning: Used by Current in RPS is different between intra and inter RPS specified in the config file.\n");
rps->setUsed(j,RPSTemp.getUsed(j));
}
}
#endif
}
}
//In case of field coding, we need to set special parameters for the first bottom field of the sequence, since it is not specified in the cfg file.
//The position = GOPSize + extraRPSs which is (a priori) unused is reserved for this field in the RPS.
if (isFieldCoding)
{
rps = rpsList->getReferencePictureSet(getGOPSize()+m_extraRPSs);
rps->setNumberOfPictures(1);
rps->setNumberOfNegativePictures(1);
rps->setNumberOfPositivePictures(0);
rps->setNumberOfLongtermPictures(0);
rps->setDeltaPOC(0,-1);
rps->setPOC(0,0);
rps->setUsed(0,true);
rps->setInterRPSPrediction(false);
rps->setDeltaRIdxMinus1(0);
rps->setDeltaRPS(0);
rps->setNumRefIdc(0);
}
}
