void DPB::prepareEncode(TComPic *pic)
{
PPAScopeEvent(DPB_prepareEncode);
int pocCurr = pic->getSlice()->getPOC();
m_picList.pushFront(*pic);
TComSlice* slice = pic->getSlice();
if (getNalUnitType(pocCurr, m_lastIDR, pic) == NAL_UNIT_CODED_SLICE_IDR_W_RADL ||
getNalUnitType(pocCurr, m_lastIDR, pic) == NAL_UNIT_CODED_SLICE_IDR_N_LP)
{
m_lastIDR = pocCurr;
}
slice->setLastIDR(m_lastIDR);
slice->setTemporalLayerNonReferenceFlag(!slice->isReferenced());
// Set the nal unit type
slice->setNalUnitType(getNalUnitType(pocCurr, m_lastIDR, pic));
// If the slice is un-referenced, change from _R "referenced" to _N "non-referenced" NAL unit type
if (slice->getTemporalLayerNonReferenceFlag())
{
switch (slice->getNalUnitType())
{
case NAL_UNIT_CODED_SLICE_TRAIL_R:
slice->setNalUnitType(NAL_UNIT_CODED_SLICE_TRAIL_N);
break;
case NAL_UNIT_CODED_SLICE_RADL_R:
slice->setNalUnitType(NAL_UNIT_CODED_SLICE_RADL_N);
break;
case NAL_UNIT_CODED_SLICE_RASL_R:
slice->setNalUnitType(NAL_UNIT_CODED_SLICE_RASL_N);
break;
default:
break;
}
}
// Do decoding refresh marking if any
decodingRefreshMarking(pocCurr, slice->getNalUnitType());
computeRPS(pocCurr, slice->isIRAP(), slice->getLocalRPS(), slice->getSPS()->getMaxDecPicBuffering(0));
slice->setRPS(slice->getLocalRPS());
slice->setRPSidx(-1); // Force use of RPS from slice, rather than from SPS
applyReferencePictureSet(slice->getRPS(), pocCurr); // Mark pictures in m_piclist as unreferenced if they are not included in RPS
arrangeLongtermPicturesInRPS(slice);
slice->setNumRefIdx(REF_PIC_LIST_0, X265_MIN(m_maxRefL0, slice->getRPS()->getNumberOfNegativePictures())); // Ensuring L0 contains just the -ve POC
slice->setNumRefIdx(REF_PIC_LIST_1, X265_MIN(m_maxRefL1, slice->getRPS()->getNumberOfPositivePictures()));
slice->setRefPicList(m_picList);
// Slice type refinement
if ((slice->getSliceType() == B_SLICE) && (slice->getNumRefIdx(REF_PIC_LIST_1) == 0))
{
slice->setSliceType(P_SLICE);
}
if (slice->getSliceType() == B_SLICE)
{
// TODO: Can we estimate this from lookahead?
slice->setColFromL0Flag(0);
bool bLowDelay = true;
int curPOC = slice->getPOC();
int refIdx = 0;
for (refIdx = 0; refIdx < slice->getNumRefIdx(REF_PIC_LIST_0) && bLowDelay; refIdx++)
{
if (slice->getRefPic(REF_PIC_LIST_0, refIdx)->getPOC() > curPOC)
{
bLowDelay = false;
}
}
for (refIdx = 0; refIdx < slice->getNumRefIdx(REF_PIC_LIST_1) && bLowDelay; refIdx++)
{
if (slice->getRefPic(REF_PIC_LIST_1, refIdx)->getPOC() > curPOC)
{
bLowDelay = false;
}
}
slice->setCheckLDC(bLowDelay);
}
else
{
slice->setCheckLDC(true);
}
slice->setRefPOCList();
slice->setEnableTMVPFlag(1);
bool bGPBcheck = false;
if (slice->getSliceType() == B_SLICE)
{
if (slice->getNumRefIdx(REF_PIC_LIST_0) == slice->getNumRefIdx(REF_PIC_LIST_1))
{
bGPBcheck = true;
for (int i = 0; i < slice->getNumRefIdx(REF_PIC_LIST_1); i++)
{
if (slice->getRefPOC(REF_PIC_LIST_1, i) != slice->getRefPOC(REF_PIC_LIST_0, i))
{
bGPBcheck = false;
break;
}
}
}
}
slice->setMvdL1ZeroFlag(bGPBcheck);
slice->setNextSlice(false);
/* Increment reference count of all motion-referenced frames. This serves two purposes. First
* it prevents the frame from being recycled, and second the referenced frames know how many
* other FrameEncoders are using them for motion reference */
int numPredDir = slice->isInterP() ? 1 : slice->isInterB() ? 2 : 0;
for (int l = 0; l < numPredDir; l++)
{
for (int ref = 0; ref < slice->getNumRefIdx(l); ref++)
{
TComPic *refpic = slice->getRefPic(l, ref);
ATOMIC_INC(&refpic->m_countRefEncoders);
}
}
}
Bool TDecTop::xDecodeSlice(InputNALUnit &nalu, Int &iSkipFrame, Int iPOCLastDisplay )
{
m_apcSlicePilot->initSlice(); // the slice pilot is an object to prepare for a new slice
// it is not associated with picture, sps or pps structures.
if (m_bFirstSliceInPicture)
{
m_uiSliceIdx = 0;
}
else
{
m_apcSlicePilot->copySliceInfo( m_pcPic->getPicSym()->getSlice(m_uiSliceIdx-1) );
}
m_apcSlicePilot->setSliceIdx(m_uiSliceIdx);
m_apcSlicePilot->setNalUnitType(nalu.m_nalUnitType);
Bool nonReferenceFlag = (m_apcSlicePilot->getNalUnitType() == NAL_UNIT_CODED_SLICE_TRAIL_N ||
m_apcSlicePilot->getNalUnitType() == NAL_UNIT_CODED_SLICE_TSA_N ||
m_apcSlicePilot->getNalUnitType() == NAL_UNIT_CODED_SLICE_STSA_N ||
m_apcSlicePilot->getNalUnitType() == NAL_UNIT_CODED_SLICE_RADL_N ||
m_apcSlicePilot->getNalUnitType() == NAL_UNIT_CODED_SLICE_RASL_N);
m_apcSlicePilot->setTemporalLayerNonReferenceFlag(nonReferenceFlag);
m_apcSlicePilot->setReferenced(true); // Putting this as true ensures that picture is referenced the first time it is in an RPS
m_apcSlicePilot->setTLayerInfo(nalu.m_temporalId);
#if ENC_DEC_TRACE
const UInt64 originalSymbolCount = g_nSymbolCounter;
#endif
m_cEntropyDecoder.decodeSliceHeader (m_apcSlicePilot, &m_parameterSetManager);
// set POC for dependent slices in skipped pictures
if(m_apcSlicePilot->getDependentSliceSegmentFlag() && m_prevSliceSkipped)
{
m_apcSlicePilot->setPOC(m_skippedPOC);
}
m_apcSlicePilot->setAssociatedIRAPPOC(m_pocCRA);
m_apcSlicePilot->setAssociatedIRAPType(m_associatedIRAPType);
//For inference of NoOutputOfPriorPicsFlag
if (m_apcSlicePilot->getRapPicFlag())
{
if ((m_apcSlicePilot->getNalUnitType() >= NAL_UNIT_CODED_SLICE_BLA_W_LP && m_apcSlicePilot->getNalUnitType() <= NAL_UNIT_CODED_SLICE_IDR_N_LP) ||
(m_apcSlicePilot->getNalUnitType() == NAL_UNIT_CODED_SLICE_CRA && m_bFirstSliceInSequence) ||
(m_apcSlicePilot->getNalUnitType() == NAL_UNIT_CODED_SLICE_CRA && m_apcSlicePilot->getHandleCraAsBlaFlag()))
{
m_apcSlicePilot->setNoRaslOutputFlag(true);
}
//the inference for NoOutputPriorPicsFlag
if (!m_bFirstSliceInBitstream && m_apcSlicePilot->getRapPicFlag() && m_apcSlicePilot->getNoRaslOutputFlag())
{
if (m_apcSlicePilot->getNalUnitType() == NAL_UNIT_CODED_SLICE_CRA)
{
m_apcSlicePilot->setNoOutputPriorPicsFlag(true);
}
}
else
{
m_apcSlicePilot->setNoOutputPriorPicsFlag(false);
}
if(m_apcSlicePilot->getNalUnitType() == NAL_UNIT_CODED_SLICE_CRA)
{
m_craNoRaslOutputFlag = m_apcSlicePilot->getNoRaslOutputFlag();
}
}
if (m_apcSlicePilot->getRapPicFlag() && m_apcSlicePilot->getNoOutputPriorPicsFlag())
{
m_lastPOCNoOutputPriorPics = m_apcSlicePilot->getPOC();
m_isNoOutputPriorPics = true;
}
else
{
m_isNoOutputPriorPics = false;
}
//For inference of PicOutputFlag
if (m_apcSlicePilot->getNalUnitType() == NAL_UNIT_CODED_SLICE_RASL_N || m_apcSlicePilot->getNalUnitType() == NAL_UNIT_CODED_SLICE_RASL_R)
{
if ( m_craNoRaslOutputFlag )
{
m_apcSlicePilot->setPicOutputFlag(false);
}
}
if (m_apcSlicePilot->getNalUnitType() == NAL_UNIT_CODED_SLICE_CRA && m_craNoRaslOutputFlag) //Reset POC MSB when CRA has NoRaslOutputFlag equal to 1
{
TComPPS *pps = m_parameterSetManager.getPPS(m_apcSlicePilot->getPPSId());
assert (pps != 0);
TComSPS *sps = m_parameterSetManager.getSPS(pps->getSPSId());
assert (sps != 0);
Int iMaxPOClsb = 1 << sps->getBitsForPOC();
m_apcSlicePilot->setPOC( m_apcSlicePilot->getPOC() & (iMaxPOClsb - 1) );
}
// Skip pictures due to random access
if (isRandomAccessSkipPicture(iSkipFrame, iPOCLastDisplay))
{
m_prevSliceSkipped = true;
m_skippedPOC = m_apcSlicePilot->getPOC();
return false;
}
// Skip TFD pictures associated with BLA/BLANT pictures
if (isSkipPictureForBLA(iPOCLastDisplay))
{
m_prevSliceSkipped = true;
m_skippedPOC = m_apcSlicePilot->getPOC();
return false;
}
// clear previous slice skipped flag
m_prevSliceSkipped = false;
//we should only get a different poc for a new picture (with CTU address==0)
if (!m_apcSlicePilot->getDependentSliceSegmentFlag() && m_apcSlicePilot->getPOC()!=m_prevPOC && !m_bFirstSliceInSequence && (m_apcSlicePilot->getSliceCurStartCtuTsAddr() != 0))
{
printf ("Warning, the first slice of a picture might have been lost!\n");
}
// exit when a new picture is found
if (!m_apcSlicePilot->getDependentSliceSegmentFlag() && (m_apcSlicePilot->getSliceCurStartCtuTsAddr() == 0 && !m_bFirstSliceInPicture) )
{
if (m_prevPOC >= m_pocRandomAccess)
{
m_prevPOC = m_apcSlicePilot->getPOC();
#if ENC_DEC_TRACE
//rewind the trace counter since we didn't actually decode the slice
g_nSymbolCounter = originalSymbolCount;
#endif
return true;
}
m_prevPOC = m_apcSlicePilot->getPOC();
}
//detect lost reference picture and insert copy of earlier frame.
{
Int lostPoc;
while((lostPoc=m_apcSlicePilot->checkThatAllRefPicsAreAvailable(m_cListPic, m_apcSlicePilot->getRPS(), true, m_pocRandomAccess)) > 0)
{
xCreateLostPicture(lostPoc-1);
}
}
if (!m_apcSlicePilot->getDependentSliceSegmentFlag())
{
m_prevPOC = m_apcSlicePilot->getPOC();
}
// actual decoding starts here
xActivateParameterSets();
m_bFirstSliceInSequence = false;
m_bFirstSliceInBitstream = false;
TComSlice* pcSlice = m_pcPic->getPicSym()->getSlice(m_uiSliceIdx);
// When decoding the slice header, the stored start and end addresses were actually RS addresses, not TS addresses.
// Now, having set up the maps, convert them to the correct form.
pcSlice->setSliceSegmentCurStartCtuTsAddr( m_pcPic->getPicSym()->getCtuRsToTsAddrMap(pcSlice->getSliceSegmentCurStartCtuTsAddr()) );
pcSlice->setSliceSegmentCurEndCtuTsAddr( m_pcPic->getPicSym()->getCtuRsToTsAddrMap(pcSlice->getSliceSegmentCurEndCtuTsAddr()) );
if(!pcSlice->getDependentSliceSegmentFlag())
{
pcSlice->setSliceCurStartCtuTsAddr(m_pcPic->getPicSym()->getCtuRsToTsAddrMap(pcSlice->getSliceCurStartCtuTsAddr()));
pcSlice->setSliceCurEndCtuTsAddr(m_pcPic->getPicSym()->getCtuRsToTsAddrMap(pcSlice->getSliceCurEndCtuTsAddr()));
}
m_pcPic->setTLayer(nalu.m_temporalId);
if (!pcSlice->getDependentSliceSegmentFlag())
{
pcSlice->checkCRA(pcSlice->getRPS(), m_pocCRA, m_associatedIRAPType, m_cListPic );
// Set reference list
pcSlice->setRefPicList( m_cListPic, true );
// For generalized B
// note: maybe not existed case (always L0 is copied to L1 if L1 is empty)
if (pcSlice->isInterB() && pcSlice->getNumRefIdx(REF_PIC_LIST_1) == 0)
{
Int iNumRefIdx = pcSlice->getNumRefIdx(REF_PIC_LIST_0);
pcSlice->setNumRefIdx ( REF_PIC_LIST_1, iNumRefIdx );
for (Int iRefIdx = 0; iRefIdx < iNumRefIdx; iRefIdx++)
{
pcSlice->setRefPic(pcSlice->getRefPic(REF_PIC_LIST_0, iRefIdx), REF_PIC_LIST_1, iRefIdx);
}
}
if (!pcSlice->isIntra())
{
Bool bLowDelay = true;
Int iCurrPOC = pcSlice->getPOC();
Int iRefIdx = 0;
for (iRefIdx = 0; iRefIdx < pcSlice->getNumRefIdx(REF_PIC_LIST_0) && bLowDelay; iRefIdx++)
{
if ( pcSlice->getRefPic(REF_PIC_LIST_0, iRefIdx)->getPOC() > iCurrPOC )
{
bLowDelay = false;
}
}
if (pcSlice->isInterB())
{
for (iRefIdx = 0; iRefIdx < pcSlice->getNumRefIdx(REF_PIC_LIST_1) && bLowDelay; iRefIdx++)
{
if ( pcSlice->getRefPic(REF_PIC_LIST_1, iRefIdx)->getPOC() > iCurrPOC )
{
bLowDelay = false;
}
}
}
pcSlice->setCheckLDC(bLowDelay);
}
//---------------
pcSlice->setRefPOCList();
}
m_pcPic->setCurrSliceIdx(m_uiSliceIdx);
if(pcSlice->getSPS()->getScalingListFlag())
{
TComScalingList scalingList;
if(pcSlice->getPPS()->getScalingListPresentFlag())
{
scalingList = pcSlice->getPPS()->getScalingList();
}
else if (pcSlice->getSPS()->getScalingListPresentFlag())
{
scalingList = pcSlice->getSPS()->getScalingList();
}
else
{
scalingList.setDefaultScalingList();
}
m_cTrQuant.setScalingListDec(scalingList, pcSlice->getSPS()->getChromaFormatIdc());
m_cTrQuant.setUseScalingList(true);
}
else
{
m_cTrQuant.setFlatScalingList(pcSlice->getSPS()->getChromaFormatIdc());
m_cTrQuant.setUseScalingList(false);
}
// Decode a picture
m_cGopDecoder.decompressSlice(nalu.m_Bitstream, m_pcPic);
m_bFirstSliceInPicture = false;
m_uiSliceIdx++;
return false;
}
