/**
* unmarshal a single SEI message from bitstream bs
*/
void parseSEImessage(TComInputBitstream& bs, SEImessages& seis)
{
unsigned payloadType = 0;
for (unsigned char byte = 0xff; 0xff == byte; )
{
payloadType += byte = bs.read(8);
}
unsigned payloadSize = 0;
for (unsigned char byte = 0xff; 0xff == byte; )
{
payloadSize += byte = bs.read(8);
}
switch (payloadType)
{
case SEI::USER_DATA_UNREGISTERED:
seis.user_data_unregistered = new SEIuserDataUnregistered;
parseSEIuserDataUnregistered(bs, *seis.user_data_unregistered, payloadSize);
break;
case SEI::PICTURE_DIGEST:
seis.picture_digest = new SEIpictureDigest;
parseSEIpictureDigest(bs, *seis.picture_digest, payloadSize);
break;
default:
assert(!"Unhandled SEI message");
}
}
/**
* parse bitstream bs and unpack a picture_digest SEI message
* of payloadSize bytes into sei.
*/
static void parseSEIpictureDigest(TComInputBitstream& bs, SEIpictureDigest& sei, unsigned payloadSize)
{
assert(payloadSize >= 17);
sei.method = static_cast<SEIpictureDigest::Method>(bs.read(8));
assert(SEIpictureDigest::MD5 == sei.method);
for (unsigned i = 0; i < 16; i++)
{
sei.digest[i] = bs.read(8);
}
}
/**
* create a NALunit structure with given header values and storage for
* a bitstream
*/
void read(InputNALUnit& nalu, vector<uint8_t>& nalUnitBuf)
{
/* perform anti-emulation prevention */
TComInputBitstream *pcBitstream = new TComInputBitstream(NULL);
convertPayloadToRBSP(nalUnitBuf, pcBitstream, (nalUnitBuf[0] & 64) == 0);
nalu.m_Bitstream = new TComInputBitstream(&nalUnitBuf);
nalu.m_Bitstream->setEmulationPreventionByteLocation(pcBitstream->getEmulationPreventionByteLocation());
delete pcBitstream;
readNalUnitHeader(nalu);
}
/**
* create a NALunit structure with given header values and storage for
* a bitstream
*/
void read(InputNALUnit& nalu, vector<uint8_t>& nalUnitBuf)
{
/* perform anti-emulation prevention */
#if TILES_DECODER
TComInputBitstream *pcBitstream = new TComInputBitstream(NULL);
convertPayloadToRBSP(nalUnitBuf, pcBitstream);
#else
convertPayloadToRBSP(nalUnitBuf);
#endif
nalu.m_Bitstream = new TComInputBitstream(&nalUnitBuf);
#if TILES_DECODER
// copy the tile marker location information
nalu.m_Bitstream->setTileMarkerLocationCount( pcBitstream->getTileMarkerLocationCount() );
for (UInt uiIdx=0; uiIdx < nalu.m_Bitstream->getTileMarkerLocationCount(); uiIdx++)
{
nalu.m_Bitstream->setTileMarkerLocation( uiIdx, pcBitstream->getTileMarkerLocation(uiIdx) );
}
delete pcBitstream;
#endif
TComInputBitstream& bs = *nalu.m_Bitstream;
bool forbidden_zero_bit = bs.read(1);
assert(forbidden_zero_bit == 0);
nalu.m_RefIDC = (NalRefIdc) bs.read(2);
nalu.m_UnitType = (NalUnitType) bs.read(5);
switch (nalu.m_UnitType)
{
case NAL_UNIT_CODED_SLICE:
case NAL_UNIT_CODED_SLICE_IDR:
case NAL_UNIT_CODED_SLICE_CDR:
{
nalu.m_TemporalID = bs.read(3);
nalu.m_OutputFlag = bs.read(1);
unsigned reserved_one_4bits = bs.read(4);
assert(reserved_one_4bits == 1);
}
break;
default:
nalu.m_TemporalID = 0;
nalu.m_OutputFlag = true;
break;
}
}
/**
* parse bitstream bs and unpack a user_data_unregistered SEI message
* of payloasSize bytes into sei.
*/
static void parseSEIuserDataUnregistered(TComInputBitstream& bs, SEIuserDataUnregistered &sei, unsigned payloadSize)
{
assert(payloadSize >= 16);
for (unsigned i = 0; i < 16; i++)
{
sei.uuid_iso_iec_11578[i] = bs.read(8);
}
sei.userDataLength = payloadSize - 16;
if (!sei.userDataLength)
{
sei.userData = 0;
return;
}
sei.userData = new unsigned char[sei.userDataLength];
for (unsigned i = 0; i < sei.userDataLength; i++)
{
sei.userData[i] = bs.read(8);
}
}
Void SEIReader::xReadSEImessage(SEIMessages& seis, const NalUnitType nalUnitType, TComSPS *sps)
{
#if ENC_DEC_TRACE
xTraceSEIHeader();
#endif
Int payloadType = 0;
UInt val = 0;
do
{
READ_CODE (8, val, "payload_type");
payloadType += val;
} while (val==0xFF);
UInt payloadSize = 0;
do
{
READ_CODE (8, val, "payload_size");
payloadSize += val;
} while (val==0xFF);
#if ENC_DEC_TRACE
xTraceSEIMessageType((SEI::PayloadType)payloadType);
#endif
/* extract the payload for this single SEI message.
* This allows greater safety in erroneous parsing of an SEI message
* from affecting subsequent messages.
* After parsing the payload, bs needs to be restored as the primary
* bitstream.
*/
TComInputBitstream *bs = getBitstream();
setBitstream(bs->extractSubstream(payloadSize * 8));
SEI *sei = NULL;
if(nalUnitType == NAL_UNIT_SEI)
{
switch (payloadType)
{
case SEI::USER_DATA_UNREGISTERED:
sei = new SEIuserDataUnregistered;
xParseSEIuserDataUnregistered((SEIuserDataUnregistered&) *sei, payloadSize);
break;
case SEI::ACTIVE_PARAMETER_SETS:
sei = new SEIActiveParameterSets;
xParseSEIActiveParameterSets((SEIActiveParameterSets&) *sei, payloadSize);
break;
case SEI::DECODING_UNIT_INFO:
if (!sps)
{
printf ("Warning: Found Decoding unit SEI message, but no active SPS is available. Ignoring.");
}
else
{
sei = new SEIDecodingUnitInfo;
xParseSEIDecodingUnitInfo((SEIDecodingUnitInfo&) *sei, payloadSize, sps);
}
break;
case SEI::BUFFERING_PERIOD:
if (!sps)
{
printf ("Warning: Found Buffering period SEI message, but no active SPS is available. Ignoring.");
}
else
{
sei = new SEIBufferingPeriod;
xParseSEIBufferingPeriod((SEIBufferingPeriod&) *sei, payloadSize, sps);
}
break;
case SEI::PICTURE_TIMING:
if (!sps)
{
printf ("Warning: Found Picture timing SEI message, but no active SPS is available. Ignoring.");
}
else
{
sei = new SEIPictureTiming;
xParseSEIPictureTiming((SEIPictureTiming&)*sei, payloadSize, sps);
}
break;
case SEI::RECOVERY_POINT:
sei = new SEIRecoveryPoint;
xParseSEIRecoveryPoint((SEIRecoveryPoint&) *sei, payloadSize);
break;
case SEI::FRAME_PACKING:
sei = new SEIFramePacking;
xParseSEIFramePacking((SEIFramePacking&) *sei, payloadSize);
break;
case SEI::DISPLAY_ORIENTATION:
sei = new SEIDisplayOrientation;
xParseSEIDisplayOrientation((SEIDisplayOrientation&) *sei, payloadSize);
break;
case SEI::TEMPORAL_LEVEL0_INDEX:
sei = new SEITemporalLevel0Index;
xParseSEITemporalLevel0Index((SEITemporalLevel0Index&) *sei, payloadSize);
break;
case SEI::REGION_REFRESH_INFO:
sei = new SEIGradualDecodingRefreshInfo;
xParseSEIGradualDecodingRefreshInfo((SEIGradualDecodingRefreshInfo&) *sei, payloadSize);
break;
default:
for (UInt i = 0; i < payloadSize; i++)
{
UInt seiByte;
READ_CODE (8, seiByte, "unknown prefix SEI payload byte");
}
printf ("Unknown prefix SEI message (payloadType = %d) was found!\n", payloadType);
}
}
else
{
switch (payloadType)
{
#if L0363_SEI_ALLOW_SUFFIX
case SEI::USER_DATA_UNREGISTERED:
sei = new SEIuserDataUnregistered;
xParseSEIuserDataUnregistered((SEIuserDataUnregistered&) *sei, payloadSize);
break;
#endif
case SEI::DECODED_PICTURE_HASH:
sei = new SEIDecodedPictureHash;
xParseSEIDecodedPictureHash((SEIDecodedPictureHash&) *sei, payloadSize);
break;
default:
for (UInt i = 0; i < payloadSize; i++)
{
UInt seiByte;
READ_CODE (8, seiByte, "unknown suffix SEI payload byte");
}
printf ("Unknown suffix SEI message (payloadType = %d) was found!\n", payloadType);
}
}
if (sei != NULL)
{
seis.push_back(sei);
}
/* By definition the underlying bitstream terminates in a byte-aligned manner.
* 1. Extract all bar the last MIN(bitsremaining,nine) bits as reserved_payload_extension_data
* 2. Examine the final 8 bits to determine the payload_bit_equal_to_one marker
* 3. Extract the remainingreserved_payload_extension_data bits.
*
* If there are fewer than 9 bits available, extract them.
*/
Int payloadBitsRemaining = getBitstream()->getNumBitsLeft();
if (payloadBitsRemaining) /* more_data_in_payload() */
{
for (; payloadBitsRemaining > 9; payloadBitsRemaining--)
{
UInt reservedPayloadExtensionData;
READ_CODE (1, reservedPayloadExtensionData, "reserved_payload_extension_data");
}
/* 2 */
Int finalBits = getBitstream()->peekBits(payloadBitsRemaining);
Int finalPayloadBits = 0;
for (Int mask = 0xff; finalBits & (mask >> finalPayloadBits); finalPayloadBits++)
{
continue;
}
/* 3 */
for (; payloadBitsRemaining > 9 - finalPayloadBits; payloadBitsRemaining--)
{
UInt reservedPayloadExtensionData;
READ_CODE (1, reservedPayloadExtensionData, "reserved_payload_extension_data");
}
UInt dummy;
READ_CODE (1, dummy, "payload_bit_equal_to_one");
READ_CODE (payloadBitsRemaining-1, dummy, "payload_bit_equal_to_zero");
}
/* restore primary bitstream for sei_message */
delete getBitstream();
setBitstream(bs);
}
Void TDecSlice::decompressSlice(TComInputBitstream* pcBitstream, TComInputBitstream** ppcSubstreams, TComPic*& rpcPic, TDecSbac* pcSbacDecoder, TDecSbac* pcSbacDecoders)
{
TComDataCU* pcCU;
UInt uiIsLast = 0;
Int iStartCUEncOrder = max(rpcPic->getSlice(rpcPic->getCurrSliceIdx())->getSliceCurStartCUAddr()/rpcPic->getNumPartInCU(), rpcPic->getSlice(rpcPic->getCurrSliceIdx())->getEntropySliceCurStartCUAddr()/rpcPic->getNumPartInCU());
Int iStartCUAddr = rpcPic->getPicSym()->getCUOrderMap(iStartCUEncOrder);
// decoder don't need prediction & residual frame buffer
rpcPic->setPicYuvPred( 0 );
rpcPic->setPicYuvResi( 0 );
#if ENC_DEC_TRACE
g_bJustDoIt = g_bEncDecTraceEnable;
#endif
DTRACE_CABAC_VL( g_nSymbolCounter++ );
DTRACE_CABAC_T( "\tPOC: " );
DTRACE_CABAC_V( rpcPic->getPOC() );
DTRACE_CABAC_T( "\n" );
#if ENC_DEC_TRACE
g_bJustDoIt = g_bEncDecTraceDisable;
#endif
UInt uiTilesAcross = rpcPic->getPicSym()->getNumColumnsMinus1()+1;
TComSlice* pcSlice = rpcPic->getSlice(rpcPic->getCurrSliceIdx());
UInt iSymbolMode = pcSlice->getPPS()->getEntropyCodingMode();
Int iNumSubstreams = pcSlice->getPPS()->getNumSubstreams();
if( iSymbolMode )
{
m_pcBufferSbacDecoders = new TDecSbac [uiTilesAcross];
m_pcBufferBinCABACs = new TDecBinCABAC[uiTilesAcross];
for (UInt ui = 0; ui < uiTilesAcross; ui++)
{
m_pcBufferSbacDecoders[ui].init(&m_pcBufferBinCABACs[ui]);
}
//save init. state
for (UInt ui = 0; ui < uiTilesAcross; ui++)
{
m_pcBufferSbacDecoders[ui].load(pcSbacDecoder);
}
}
if( iSymbolMode )
{
m_pcBufferLowLatSbacDecoders = new TDecSbac [uiTilesAcross];
m_pcBufferLowLatBinCABACs = new TDecBinCABAC[uiTilesAcross];
for (UInt ui = 0; ui < uiTilesAcross; ui++)
m_pcBufferLowLatSbacDecoders[ui].init(&m_pcBufferLowLatBinCABACs[ui]);
//save init. state
for (UInt ui = 0; ui < uiTilesAcross; ui++)
m_pcBufferLowLatSbacDecoders[ui].load(pcSbacDecoder);
}
UInt uiWidthInLCUs = rpcPic->getPicSym()->getFrameWidthInCU();
//UInt uiHeightInLCUs = rpcPic->getPicSym()->getFrameHeightInCU();
UInt uiCol=0, uiLin=0, uiSubStrm=0;
UInt uiTileCol;
UInt uiTileStartLCU;
UInt uiTileLCUX;
UInt uiTileLCUY;
UInt uiTileWidth;
UInt uiTileHeight;
Int iNumSubstreamsPerTile = 1; // if independent.
for( Int iCUAddr = iStartCUAddr; !uiIsLast && iCUAddr < rpcPic->getNumCUsInFrame(); iCUAddr = rpcPic->getPicSym()->xCalculateNxtCUAddr(iCUAddr) )
{
pcCU = rpcPic->getCU( iCUAddr );
pcCU->initCU( rpcPic, iCUAddr );
uiTileCol = rpcPic->getPicSym()->getTileIdxMap(iCUAddr) % (rpcPic->getPicSym()->getNumColumnsMinus1()+1); // what column of tiles are we in?
uiTileStartLCU = rpcPic->getPicSym()->getTComTile(rpcPic->getPicSym()->getTileIdxMap(iCUAddr))->getFirstCUAddr();
uiTileLCUX = uiTileStartLCU % uiWidthInLCUs;
uiTileLCUY = uiTileStartLCU / uiWidthInLCUs;
uiTileWidth = rpcPic->getPicSym()->getTComTile(rpcPic->getPicSym()->getTileIdxMap(iCUAddr))->getTileWidth();
uiTileHeight = rpcPic->getPicSym()->getTComTile(rpcPic->getPicSym()->getTileIdxMap(iCUAddr))->getTileHeight();
uiCol = iCUAddr % uiWidthInLCUs;
uiLin = iCUAddr / uiWidthInLCUs;
// inherit from TR if necessary, select substream to use.
if( iSymbolMode && pcSlice->getPPS()->getNumSubstreams() > 1 )
{
if (pcSlice->getPPS()->getNumSubstreams() > 1)
{
// independent tiles => substreams are "per tile". iNumSubstreams has already been multiplied.
iNumSubstreamsPerTile = iNumSubstreams/rpcPic->getPicSym()->getNumTiles();
uiSubStrm = rpcPic->getPicSym()->getTileIdxMap(iCUAddr)*iNumSubstreamsPerTile
+ uiLin%iNumSubstreamsPerTile;
}
else
{
// dependent tiles => substreams are "per frame".
uiSubStrm = uiLin % iNumSubstreams;
}
m_pcEntropyDecoder->setBitstream( ppcSubstreams[uiSubStrm] );
// Synchronize cabac probabilities with upper-right LCU if it's available and we're at the start of a line.
if (pcSlice->getPPS()->getNumSubstreams() > 1 && uiCol == uiTileLCUX)
{
// We'll sync if the TR is available.
TComDataCU *pcCUUp = pcCU->getCUAbove();
UInt uiWidthInCU = rpcPic->getFrameWidthInCU();
TComDataCU *pcCUTR = NULL;
if ( pcCUUp && ((iCUAddr%uiWidthInCU+1) < uiWidthInCU) )
{
pcCUTR = rpcPic->getCU( iCUAddr - uiWidthInCU + 1 );
}
UInt uiMaxParts = 1<<(pcSlice->getSPS()->getMaxCUDepth()<<1);
if ( (true/*bEnforceSliceRestriction*/ &&
((pcCUTR==NULL) || (pcCUTR->getSlice()==NULL) ||
((pcCUTR->getSCUAddr()+uiMaxParts-1) < pcSlice->getSliceCurStartCUAddr()) ||
((rpcPic->getPicSym()->getTileIdxMap( pcCUTR->getAddr() ) != rpcPic->getPicSym()->getTileIdxMap(iCUAddr)))
))||
(true/*bEnforceEntropySliceRestriction*/ &&
((pcCUTR==NULL) || (pcCUTR->getSlice()==NULL) ||
((pcCUTR->getSCUAddr()+uiMaxParts-1) < pcSlice->getEntropySliceCurStartCUAddr()) ||
((rpcPic->getPicSym()->getTileIdxMap( pcCUTR->getAddr() ) != rpcPic->getPicSym()->getTileIdxMap(iCUAddr)))
))
)
{
// TR not available.
}
else
{
// TR is available, we use it.
pcSbacDecoders[uiSubStrm].loadContexts( &m_pcBufferSbacDecoders[uiTileCol] );
}
}
pcSbacDecoder->load(&pcSbacDecoders[uiSubStrm]); //this load is used to simplify the code (avoid to change all the call to pcSbacDecoders)
}
else if ( iSymbolMode && pcSlice->getPPS()->getNumSubstreams() <= 1 )
{
// Set variables to appropriate values to avoid later code change.
iNumSubstreamsPerTile = 1;
}
if ( (iCUAddr == rpcPic->getPicSym()->getTComTile(rpcPic->getPicSym()->getTileIdxMap(iCUAddr))->getFirstCUAddr()) && // 1st in tile.
(iCUAddr!=0) && (iCUAddr!=rpcPic->getPicSym()->getPicSCUAddr(rpcPic->getSlice(rpcPic->getCurrSliceIdx())->getSliceCurStartCUAddr())/rpcPic->getNumPartInCU())) // !1st in frame && !1st in slice
{
if (pcSlice->getPPS()->getNumSubstreams() > 1)
{
// We're crossing into another tile, tiles are independent.
// When tiles are independent, we have "substreams per tile". Each substream has already been terminated, and we no longer
// have to perform it here.
// For TILES_DECODER, there can be a header at the start of the 1st substream in a tile. These are read when the substreams
// are extracted, not here.
}
else
{
#if CABAC_INIT_FLAG
SliceType sliceType = pcSlice->getSliceType();
if (pcSlice->getCabacInitFlag())
{
switch (sliceType)
{
case P_SLICE: // change initialization table to B_SLICE intialization
sliceType = B_SLICE;
break;
case B_SLICE: // change initialization table to P_SLICE intialization
sliceType = P_SLICE;
break;
default : // should not occur
assert(0);
}
}
m_pcEntropyDecoder->updateContextTables( sliceType, pcSlice->getSliceQp() );
#else
m_pcEntropyDecoder->updateContextTables( pcSlice->getSliceType(), pcSlice->getSliceQp() );
#endif
}
Bool bTileMarkerFoundFlag = false;
TComInputBitstream *pcTmpPtr;
pcTmpPtr = ppcSubstreams[uiSubStrm]; // for CABAC
for (UInt uiIdx=0; uiIdx<pcTmpPtr->getTileMarkerLocationCount(); uiIdx++)
{
if ( pcTmpPtr->getByteLocation() == (pcTmpPtr->getTileMarkerLocation( uiIdx )+2) )
{
bTileMarkerFoundFlag = true;
break;
}
}
if (bTileMarkerFoundFlag)
{
UInt uiTileIdx;
// Read tile index
m_pcEntropyDecoder->readTileMarker( uiTileIdx, rpcPic->getPicSym()->getBitsUsedByTileIdx() );
}
}
#if ENC_DEC_TRACE
g_bJustDoIt = g_bEncDecTraceEnable;
#endif
if ( pcSlice->getSPS()->getUseSAO() && pcSlice->getSaoInterleavingFlag() && pcSlice->getSaoEnabledFlag() )
{
pcSlice->getAPS()->getSaoParam()->bSaoFlag[0] = pcSlice->getSaoEnabledFlag();
if (iCUAddr == iStartCUAddr)
{
pcSlice->getAPS()->getSaoParam()->bSaoFlag[1] = pcSlice->getSaoEnabledFlagCb();
pcSlice->getAPS()->getSaoParam()->bSaoFlag[2] = pcSlice->getSaoEnabledFlagCr();
}
Int numCuInWidth = pcSlice->getAPS()->getSaoParam()->numCuInWidth;
Int cuAddrInSlice = iCUAddr - pcSlice->getSliceCurStartCUAddr()/rpcPic->getNumPartInCU();
Int cuAddrUpInSlice = cuAddrInSlice - numCuInWidth;
Int rx = iCUAddr % numCuInWidth;
Int ry = iCUAddr / numCuInWidth;
pcSbacDecoder->parseSaoOneLcuInterleaving(rx, ry, pcSlice->getAPS()->getSaoParam(),pcCU, cuAddrInSlice, cuAddrUpInSlice, pcSlice->getSPS()->getLFCrossSliceBoundaryFlag() );
}
m_pcCuDecoder->decodeCU ( pcCU, uiIsLast );
m_pcCuDecoder->decompressCU ( pcCU );
#if ENC_DEC_TRACE
g_bJustDoIt = g_bEncDecTraceDisable;
#endif
if( iSymbolMode )
{
/*If at the end of a LCU line but not at the end of a substream, perform CABAC flush*/
if (!uiIsLast && pcSlice->getPPS()->getNumSubstreams() > 1)
{
if ((uiCol == uiTileLCUX+uiTileWidth-1) && (uiLin+iNumSubstreamsPerTile < uiTileLCUY+uiTileHeight))
{
m_pcEntropyDecoder->decodeFlush();
}
}
pcSbacDecoders[uiSubStrm].load(pcSbacDecoder);
//Store probabilities of second LCU in line into buffer
if (pcSlice->getPPS()->getNumSubstreams() > 1 && (uiCol == uiTileLCUX+1))
{
m_pcBufferSbacDecoders[uiTileCol].loadContexts( &pcSbacDecoders[uiSubStrm] );
}
}
}
}
