📄 fgssubbanddecoder.cpp
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for(ui = 0; ui < 4; ui++)
{
m_auiScanPosVectChromaDC[ui] = ui;
}
if(m_pcCurrSliceHeader->getFGSCodingMode() == false)
{
//grouping size mode
UInt uiGroupingSize = m_pcCurrSliceHeader->getGroupingSize();
ui = 0;
m_auiScanPosVectLuma[ui] = uiGroupingSize-1;
while( m_auiScanPosVectLuma[ui] < 15)
{
ui++;
m_auiScanPosVectLuma[ui] = m_auiScanPosVectLuma[ui-1]+uiGroupingSize;
}
}
else
{
//vector specified
ui = 0;
m_auiScanPosVectLuma[ui] = m_pcCurrSliceHeader->getPosVect(ui);
while( m_auiScanPosVectLuma[ui] != 15)
{
ui++;
m_auiScanPosVectLuma[ui] = m_auiScanPosVectLuma[ui-1] + m_pcCurrSliceHeader->getPosVect(ui);
}
}
try
{
AOT( m_pcSymbolReader == 0 );
RNOK( m_pcSymbolReader ->startSlice( *m_pcCurrSliceHeader ) );
//===== SIGNIFICANCE PATH =====
{
UInt iStartCycle = 0, iCycle = 0;
UInt iLumaScanIdx = 0;
UInt iChromaDCScanIdx = 0;
UInt iChromaACScanIdx = 1;
UInt uiFirstMbY = (UInt) ( uiFirstMbInSlice / m_uiWidthInMB );
UInt uiFirstMbX = uiFirstMbInSlice % m_uiWidthInMB;
UInt uiLastMbY = (UInt) ( ( uiFirstMbInSlice + uiNumMbsInSlice ) / m_uiWidthInMB );
UInt uiLastMbX = ( uiFirstMbInSlice + uiNumMbsInSlice ) % m_uiWidthInMB;
RNOK( m_pcSymbolReader->RQdecodeEobOffsets_Luma () );
RNOK( m_pcSymbolReader->RQdecodeEobOffsets_Chroma() );
RNOK( m_pcSymbolReader->RQdecodeBestCodeTableMap ( 16 ) );
m_uiLumaCbpRun = 0;
m_uiChromaCbpRun = 0;
Bool bChromaCbpFlag;
if( ! m_pcCurrSliceHeader->getPPS().getEntropyCodingModeFlag() )
{
m_pcUvlcReader->getFlag(m_bLastLumaCbpFlag, "Luma_CBP_first_flag");
m_pcUvlcReader->getFlag(bChromaCbpFlag, "Chroma_CBP_first");
m_uiLastChromaCbp = bChromaCbpFlag ? 1 : 0;
}
while (iLumaScanIdx < 16 || iChromaDCScanIdx < 4 || iChromaACScanIdx < 16) {
UInt bAllowChromaDC = (iCycle == 0) || ((iCycle >= iStartCycle) && ((iCycle-iStartCycle) % 2 == 0));
UInt bAllowChromaAC = (iCycle > 0) && ((iCycle == iStartCycle) || ((iCycle >= iStartCycle) && ((iCycle-iStartCycle) % 3 == 1)));
if( iLumaScanIdx >= 16 && !bAllowChromaDC && !bAllowChromaAC )
{
iCycle++;
continue;
}
UInt uiMaxPosLuma;
UInt uiMaxPosChromaAC;
UInt uiMaxPosChromaDC;
if( iLumaScanIdx == 16 )
uiMaxPosLuma = 16;
else {
for( ui=0; m_auiScanPosVectLuma[ui]<iLumaScanIdx; ui++ ) ;
uiMaxPosLuma = m_auiScanPosVectLuma[ui];
}
if( iChromaACScanIdx == 16 )
uiMaxPosChromaAC = 16;
else {
for( ui=0; 1+m_auiScanPosVectLuma[ui]<iChromaACScanIdx; ui++ ) ;
uiMaxPosChromaAC = 1+m_auiScanPosVectLuma[ui];
}
if( iChromaDCScanIdx == 16 )
uiMaxPosChromaDC = 16;
else {
for( ui=0; m_auiScanPosVectChromaDC[ui]<iChromaDCScanIdx; ui++ ) ;
uiMaxPosChromaDC = m_auiScanPosVectChromaDC[ui];
}
for( UInt uiMbYIdx = uiFirstMbY; uiMbYIdx < uiLastMbY; uiMbYIdx++ )
{
for( UInt uiMbXIdx = ( uiMbYIdx == uiFirstMbY ? uiFirstMbX : 0 ); uiMbXIdx < ( uiMbYIdx == uiLastMbY ? uiLastMbX : m_uiWidthInMB ); uiMbXIdx++ )
{
if( m_pcCurrSliceHeader->getAdaptivePredictionFlag() &&
! m_pcCurrMbDataCtrl->getMbData( uiMbXIdx, uiMbYIdx ).isIntra() &&
( m_pauiMacroblockMap[uiMbYIdx * m_uiWidthInMB + uiMbXIdx] >> NUM_COEFF_SHIFT ) == 0 )
{
//----- Read motion parameters the first time we visit each inter-coded macroblock -----
RNOK( xDecodeMotionData( uiMbYIdx, uiMbXIdx ) );
}
//===== Luma =====
if( ! m_pcCurrSliceHeader->getPPS().getEntropyCodingModeFlag() )
{
if( iLumaScanIdx == 0 )
{
xDecodeLumaCbpVlc(uiMbXIdx, uiMbYIdx);
xDecodeChromaCbpVlc(uiMbXIdx, uiMbYIdx);
}
}
RNOK( xDecodeNewCoefficientLumaMb( uiMbYIdx, uiMbXIdx, iLastQP, iLumaScanIdx, uiMaxPosLuma ) );
//===== CHROMA DC =====
if( bAllowChromaDC && ( m_bFgsComponentSep == 0 || iLumaScanIdx == 16 ) ) {
for( UInt uiPlane = 0; uiPlane < 2; uiPlane ++ ) {
for( ui=iChromaDCScanIdx; ui<=uiMaxPosChromaDC && ui<4; ui++ )
{
if( ui == 0 || ui == m_apaucScanPosMap[uiPlane+1][uiMbYIdx * m_uiWidthInMB + uiMbXIdx] )
RNOK( xDecodeNewCoefficientChromaDC( uiPlane, uiMbYIdx, uiMbXIdx, iLastQP, ui ) );
if( (m_aapaucChromaDCCoefMap[uiPlane][ui][uiMbYIdx * m_uiWidthInMB + uiMbXIdx] & SIGNIFICANT) &&
!(m_aapaucChromaDCCoefMap[uiPlane][ui][uiMbYIdx * m_uiWidthInMB + uiMbXIdx] & CODED) )
RNOK( xDecodeCoefficientChromaDCRef( uiPlane, uiMbYIdx, uiMbXIdx, ui ) );
}
} // for
} // if
//===== CHROMA AC =====
if( bAllowChromaAC && ( m_bFgsComponentSep == 0 || iLumaScanIdx == 16 ) ) {
for( UInt uiPlane = 0; uiPlane < 2; uiPlane ++ )
for( UInt uiB8YIdx = 2 * uiMbYIdx; uiB8YIdx < 2 * uiMbYIdx + 2; uiB8YIdx++ )
for( UInt uiB8XIdx = 2 * uiMbXIdx; uiB8XIdx < 2 * uiMbXIdx + 2; uiB8XIdx++ ) {
for( ui=iChromaACScanIdx; ui<=uiMaxPosChromaAC && ui<16; ui++ )
{
if( ui == 1 || ui == m_apaucScanPosMap[uiPlane+3][uiB8YIdx*2 * m_uiWidthInMB + uiB8XIdx] )
RNOK( xDecodeNewCoefficientChromaAC( uiPlane, uiB8YIdx, uiB8XIdx, iLastQP, ui ) );
if((m_aapaucChromaACCoefMap[uiPlane][ui][uiB8YIdx*2 * m_uiWidthInMB + uiB8XIdx] & SIGNIFICANT) &&
!(m_aapaucChromaACCoefMap[uiPlane][ui][uiB8YIdx*2 * m_uiWidthInMB + uiB8XIdx] & CODED) )
RNOK( xDecodeCoefficientChromaACRef( uiPlane, uiB8YIdx, uiB8XIdx, ui ) );
}
} // for
} // if
RNOK( m_pcSymbolReader->RQupdateVlcTable() );
} // macroblock iteration
}
RNOK( m_pcSymbolReader->RQvlcFlush() );
iLumaScanIdx = min(uiMaxPosLuma+1, 16);
if (bAllowChromaDC)
iChromaDCScanIdx = min(uiMaxPosChromaDC+1, 4);
if (bAllowChromaAC)
iChromaACScanIdx = min(uiMaxPosChromaAC+1, 16);
if ( iCycle == 0 && m_bFgsComponentSep == 0 )
{
m_pcSymbolReader->RQdecodeCycleSymbol(iStartCycle);
}
iCycle++;
} // while
}
// ==
UInt uiTermBit = 0;
RNOK( m_pcSymbolReader->RQdecodeTermBit( uiTermBit ) );
// heiko.schwarz@hhi.fhg.de: decoder could assert when nearly complete FGS slices are decoded
//ROF ( uiTermBit );
if( !uiTermBit )
{
throw BitReadBuffer::ReadStop();
}
}
catch( BitReadBuffer::ReadStop )
{
m_bPicFinished = true;
}
if(m_pcSymbolReader == m_pcUvlcReader)
{
m_pcUvlcReader->m_bTruncated = m_bPicFinished;
}
RNOK( m_pcSymbolReader->finishSlice( ) );
if( ! m_bPicFinished )
{
m_pcCurrSliceHeader->setQualityLevel( m_pcCurrSliceHeader->getQualityLevel() + 1 );
}
RNOK( xUpdateCodingPath() );
RNOK( xClearCodingPath() );
return Err::m_nOK;
}
ErrVal
RQFGSDecoder::xDecodingFGS( SliceHeader* pcSliceHeader )
{
RNOK( m_cMbDataCtrlEL .reset () );
RNOK( m_cMbDataCtrlEL .clear () );
RNOK( m_cMbDataCtrlEL .initSlice ( *m_pcCurrSliceHeader, PARSE_PROCESS, true, NULL ) );
RNOK( m_pcCurrMbDataCtrl->initSlice ( *m_pcCurrSliceHeader, PRE_PROCESS, true, NULL ) );
RNOK( xInitializeMacroblockQPs() );
RNOK( m_cMbDataCtrlEL .initSlice ( *m_pcCurrSliceHeader, PRE_PROCESS, true, NULL ) );
Int iLastQP = m_pcCurrSliceHeader->getPicQp();
UInt uiFirstMbInSlice = m_pcCurrSliceHeader->getFirstMbInSlice ();
// JVT-S054 (2) (ADD)
UInt uiLastMbInSlice = m_pcCurrSliceHeader->getLastMbInSlice();
m_bFgsComponentSep = m_pcCurrSliceHeader->getFgsComponentSep();
Bool isTruncated =false;
//positions vector for luma (and chromaAC) and chroma DC
UInt ui;
for(ui = 0; ui < 4; ui++)
{
m_auiScanPosVectChromaDC[ui] = ui;
}
if(m_pcCurrSliceHeader->getFGSCodingMode() == false)
{
//grouping size mode
UInt uiGroupingSize = m_pcCurrSliceHeader->getGroupingSize();
ui = 0;
m_auiScanPosVectLuma[ui] = uiGroupingSize-1;
while( m_auiScanPosVectLuma[ui] < 15)
{
ui++;
m_auiScanPosVectLuma[ui] = m_auiScanPosVectLuma[ui-1]+uiGroupingSize;
}
}
else
{
//vector specified
ui = 0;
m_auiScanPosVectLuma[ui] = m_pcCurrSliceHeader->getPosVect(ui);
while( m_auiScanPosVectLuma[ui] != 15)
{
ui++;
m_auiScanPosVectLuma[ui] = m_auiScanPosVectLuma[ui-1] + m_pcCurrSliceHeader->getPosVect(ui);
}
}
try
{
AOT( m_pcSymbolReader == 0 );
RNOK( m_pcSymbolReader ->startSlice( *m_pcCurrSliceHeader ) );
//===== SIGNIFICANCE PATH =====
{
UInt iStartCycle = 0, iCycle = 0;
UInt iLumaScanIdx = 0;
UInt iChromaDCScanIdx = 0;
UInt iChromaACScanIdx = 1;
RNOK( m_pcSymbolReader->RQdecodeEobOffsets_Luma () );
RNOK( m_pcSymbolReader->RQdecodeEobOffsets_Chroma() );
RNOK( m_pcSymbolReader->RQdecodeBestCodeTableMap ( 16 ) );
m_uiLumaCbpRun = 0;
m_uiChromaCbpRun = 0;
Bool bChromaCbpFlag;
if( ! m_pcCurrSliceHeader->getPPS().getEntropyCodingModeFlag() )
{
m_pcUvlcReader->getFlag(m_bLastLumaCbpFlag, "Luma_CBP_first_flag");
m_pcUvlcReader->getFlag(bChromaCbpFlag, "Chroma_CBP_first");
m_uiLastChromaCbp = bChromaCbpFlag ? 1 : 0;
}
while (iLumaScanIdx < 16 || iChromaDCScanIdx < 4 || iChromaACScanIdx < 16) {
UInt bAllowChromaDC = (iCycle == 0) || ((iCycle >= iStartCycle) && ((iCycle-iStartCycle) % 2 == 0));
UInt bAllowChromaAC = (iCycle > 0) && ((iCycle == iStartCycle) || ((iCycle >= iStartCycle) && ((iCycle-iStartCycle) % 3 == 1)));
if( iLumaScanIdx >= 16 && !bAllowChromaDC && !bAllowChromaAC )
{
iCycle++;
continue;
}
UInt uiMaxPosLuma;
UInt uiMaxPosChromaAC;
UInt uiMaxPosChromaDC;
if( iLumaScanIdx == 16 )
uiMaxPosLuma = 16;
else {
for( ui=0; m_auiScanPosVectLuma[ui]<iLumaScanIdx; ui++ ) ;
uiMaxPosLuma = m_auiScanPosVectLuma[ui];
}
if( iChromaACScanIdx == 16 )
uiMaxPosChromaAC = 16;
else {
for( ui=0; 1+m_auiScanPosVectLuma[ui]<iChromaACScanIdx; ui++ ) ;
uiMaxPosChromaAC = 1+m_auiScanPosVectLuma[ui];
}
if( iChromaDCScanIdx == 16 )
uiMaxPosChromaDC = 16;
else {
for( ui=0; m_auiScanPosVectChromaDC[ui]<iChromaDCScanIdx; ui++ ) ;
uiMaxPosChromaDC = m_auiScanPosVectChromaDC[ui];
}
UInt uiMbAddress = 0;
for(uiMbAddress=uiFirstMbInSlice ;uiMbAddress<=uiLastMbInSlice ;)
{
UInt uiMbYIdx = uiMbAddress / m_uiWidthInMB;
UInt uiMbXIdx = uiMbAddress % m_uiWidthInMB;
if( m_pcCurrSliceHeader->getAdaptivePredictionFlag() &&
! m_pcCurrMbDataCtrl->getMbData( uiMbXIdx, uiMbYIdx ).isIntra() &&
( m_pauiMacroblockMap[uiMbYIdx * m_uiWidthInMB + uiMbXIdx] >> NUM_COEFF_SHIFT ) == 0 )
{
//----- Read motion parameters the first time we visit each inter-coded macroblock -----
RNOK( xDecodeMotionData( uiMbYIdx, uiMbXIdx ) );
}
//===== Luma =====
if( ! m_pcCurrSliceHeader->getPPS().getEntropyCodingModeFlag() )
{
if( iLumaScanIdx == 0 )
{
xDecodeLumaCbpVlc(uiMbXIdx, uiMbYIdx);
xDecodeChromaCbpVlc(uiMbXIdx, uiMbYIdx);
}
}
RNOK( xDecodeNewCoefficientLumaMb( uiMbYIdx, uiMbXIdx, iLastQP, iLumaScanIdx, uiMaxPosLuma ) );
//===== CHROMA DC =====
if( bAllowChromaDC && ( m_bFgsComponentSep == 0 || iLumaScanIdx == 16 ) ) {
for( UInt uiPlane = 0; uiPlane < 2; uiPlane ++ ) {
for( ui=iChromaDCScanIdx; ui<=uiMaxPosChromaDC && ui<4; ui++ )
{
if( ui == 0 || ui == m_apaucScanPosMap[uiPlane+1][uiMbYIdx * m_uiWidthInMB + uiMbXIdx] )
RNOK( xDecodeNewCoefficientChromaDC( uiPlane, uiMbYIdx, uiMbXIdx, iLastQP, ui ) );
if( (m_aapaucChromaDCCoefMap[uiPlane][ui][uiMbYIdx * m_uiWidthInMB + uiMbXIdx] & SIGNIFICANT) &&
!(m_aapaucChromaDCCoefMap[uiPlane][ui][uiMbYIdx * m_uiWidthInMB + uiMbXIdx] & CODED) )
RNOK( xDecodeCoefficientChromaDCRef( uiPlane, uiMbYIdx, uiMbXIdx, ui ) );
}
} // for
} // if
//===== CHROMA AC =====
if( bAllowChromaAC && ( m_bFgsComponentSep == 0 || iLumaScanIdx == 16 ) ) {
for( UInt uiPlane = 0; uiPlane < 2; uiPlane ++ )
for( UInt uiB8YIdx = 2 * uiMbYIdx; uiB8YIdx < 2 * uiMbYIdx + 2; uiB8YIdx++ )
for( UInt uiB8XIdx = 2 * uiMbXIdx; uiB8XIdx < 2 * uiMbXIdx + 2; uiB8XIdx++ ) {
for( ui=iChromaACScanIdx; ui<=uiMaxPosChromaAC && ui<16; ui++ )
{
if( ui == 1 || ui == m_apaucScanPosMap[uiPlane+3][uiB8YIdx*2 * m_uiWidthInMB + uiB8XIdx] )
RNOK( xDecodeNewCoefficientChromaAC( uiPlane, uiB8YIdx, uiB8XIdx, iLastQP, ui ) );
if((m_aapaucChromaACCoefMap[uiPlane][ui][uiB8YIdx*2 * m_uiWidthInMB + uiB8XIdx] & SIGNIFICANT) &&
!(m_aapaucChromaACCoefMap[uiPlane][ui][uiB8YIdx*2 * m_uiWidthInMB + uiB8XIdx] & CODED) )
RNOK( xDecodeCoefficientChromaACRef( uiPlane, uiB8YIdx, uiB8XIdx, ui ) );
}
} // for
} // if
RNOK( m_pcSymbolReader->RQupdateVlcTable() );
//--ICU/ETRI FMO Implementation
uiMbAddress = m_pcCurrSliceHeader->getFMO()->getNextMBNr(uiMbAddress );
} // macroblock iteration
RNOK( m_pcSymbolReader->RQvlcFlush() );
iLumaScanIdx = min(uiMaxPosLuma+1, 16);
if (bAllowChromaDC)
iChromaDCScanIdx = min(uiMaxPosChromaDC+1, 4);
if (bAllowChromaAC)
iChromaACScanIdx = min(uiMaxPosChromaAC+1, 16);
if ( iCycle == 0 && m_bFgsComponentSep == 0 )
{
m_pcSymbolReader->RQdecodeCycleSymbol(iStartCycle);
}
iCycle++;
} // while
}
// ==
UInt uiTermBit = 0;
RNOK( m_pcSymbolReader->RQdecodeTermBit( uiTermBit ) );
// heiko.schwarz@hhi.fhg.de: decoder could assert when nearly complete FGS slices are decoded
//ROF ( uiTermBit );
if( !uiTermBit )
{
throw BitReadBuffer::ReadStop();
}
}
catch( BitReadBuffer::ReadStop )
{
// FGS ROI DECODE ICU/ETRI
isTruncated =true;
}
if(m_pcSymbolReader == m_pcUvlcReader)
{
// FGS ROI DECODE ICU/ETRI
m_pcUvlcReader->m_bTruncated = isTruncated ;
}
RNOK( m_pcSymbolReader->finishSlice( ) );
if( ! m_bPicFinished )
{
m_pcCurrSliceHeader->setQualityLevel( pcSliceHeader->getQualityLevel());
}
//--ICU/ETRI 1206
RNOK( xUpdateCodingPath(pcSliceHeader) );
RNOK( xClearCodingPath() );
return Err::m_nOK;
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