📄 cabacreader.cpp
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if( uiSymbol )
{
rcMbDataAccessBase.getMbData().setMbCbp( rcMbDataAccessBase.getMbData().getMbCbp() | 0x10 );
}
return ( uiSymbol == 1 );
}
Bool
CabacReader::RQdecodeCBP_ChromaAC( MbDataAccess& rcMbDataAccess,
MbDataAccess& rcMbDataAccessBase )
{
UInt uiSymbol = 0;
UInt uiLeftChromaCbp = rcMbDataAccessBase.getLeftChromaCbpFGS ();
UInt uiAboveChromaCbp = rcMbDataAccessBase.getAboveChromaCbpFGS();
UInt uiCtx = ( uiLeftChromaCbp > 1 ? 1 : 0 ) + ( uiAboveChromaCbp > 1 ? 2 : 0 );
ANOK( CabaDecoder::getSymbol( uiSymbol, m_cCbpCCModel.get( 2, uiCtx ) ) );
DTRACE_T( "CBP_ChromaAC" );
DTRACE_V( uiSymbol );
DTRACE_N;
if( uiSymbol )
{
rcMbDataAccessBase.getMbData().setMbCbp( ( rcMbDataAccessBase.getMbData().getMbCbp() & 0xF ) | 0x20 );
}
return ( uiSymbol == 1 );
}
Bool
CabacReader::RQdecodeCBP_8x8( MbDataAccess& rcMbDataAccess,
MbDataAccess& rcMbDataAccessBase,
B8x8Idx c8x8Idx )
{
UInt uiSymbol = 0;
UInt uiCurrentCbp = rcMbDataAccessBase.getMbData().getMbCbp();
UInt uiLeftLumaCbp = rcMbDataAccessBase.getLeftLumaCbpFGS ( c8x8Idx );
UInt uiAboveLumaCbp = rcMbDataAccessBase.getAboveLumaCbpFGS( c8x8Idx );
UInt uiCtx = 0;
switch( c8x8Idx.b8x8Index() )
{
case 0: uiCtx = 3 - uiLeftLumaCbp - 2*uiAboveLumaCbp; break;
case 1: uiCtx = 3 - ( uiCurrentCbp &1) - 2*uiAboveLumaCbp; break;
case 2: uiCtx = 3 - uiLeftLumaCbp - ((uiCurrentCbp<<1)&2); break;
case 3: uiCtx = 3 - ((uiCurrentCbp>>2)&1) - ( uiCurrentCbp &2); break;
default: AF();
}
ANOK( CabaDecoder::getSymbol( uiSymbol, m_cCbpCCModel.get( 0, uiCtx ) ) );
DTRACE_T( "CBP_Luma" );
DTRACE_V( uiSymbol );
DTRACE_N;
if( uiSymbol )
{
rcMbDataAccessBase.getMbData().setMbCbp( rcMbDataAccessBase.getMbData().getMbCbp() | ( 1 << c8x8Idx.b8x8Index() ) );
}
return ( uiSymbol == 1 );
}
ErrVal
CabacReader::RQdecodeDeltaQp( MbDataAccess& rcMbDataAccess)
{
UInt uiDQp = 0;
Int iDQp = 0;
UInt uiCtx = 0;
RNOK( CabaDecoder::getSymbol( uiDQp, m_cDeltaQpCCModel.get( 0, uiCtx ) ) );
if( uiDQp )
{
RNOK( CabaDecoder::getUnarySymbol( uiDQp, &m_cDeltaQpCCModel.get( 0, 2 ), 1 ) );
iDQp = (uiDQp + 2) / 2;
if( uiDQp & 1 )
{
iDQp = -iDQp;
}
}
DTRACE_T( "DQP" );
DTRACE_V( uiDQp );
DTRACE_N;
rcMbDataAccess.addDeltaQp( iDQp );
return Err::m_nOK;
}
ErrVal
CabacReader::RQdecode8x8Flag( MbDataAccess& rcMbDataAccess,
MbDataAccess& rcMbDataAccessBase )
{
UInt uiSymbol = 0;
UInt uiCtx = rcMbDataAccessBase.getCtx8x8Flag();
RNOK( CabaDecoder::getSymbol( uiSymbol, m_cTransSizeCCModel.get( 0, uiCtx ) ) );
DTRACE_T( "TRAFO_8x8" );
DTRACE_V( uiSymbol );
DTRACE_N;
rcMbDataAccess .getMbData().setTransformSize8x8( uiSymbol == 1 );
rcMbDataAccessBase.getMbData().setTransformSize8x8( uiSymbol == 1 );
return Err::m_nOK;
}
ErrVal
CabacReader::RQdecodeTermBit ( UInt& ruiBit )
{
RNOK( CabaDecoder::getTerminateBufferBit( ruiBit ) );
DTRACE_T( "EOS" );
DTRACE_V( ruiBit );
DTRACE_N;
return Err::m_nOK;
}
ErrVal
CabacReader::RQeo8b( Bool& bEob )
{
bEob = false;
return Err::m_nOK;
}
ErrVal
CabacReader::RQdecodeNewTCoeff_8x8( MbDataAccess& rcMbDataAccess,
MbDataAccess& rcMbDataAccessBase,
B8x8Idx c8x8Idx,
UInt uiScanIndex,
Bool& rbLast,
UInt& ruiNumCoefRead )
{
TCoeff* piCoeff = rcMbDataAccess .getMbTCoeffs().get8x8( c8x8Idx );
TCoeff* piCoeffBase = rcMbDataAccessBase.getMbTCoeffs().get8x8( c8x8Idx );
const UChar* pucScan = g_aucFrameScan64;
ROT( piCoeffBase[pucScan[uiScanIndex]] );
DTRACE_T( "LUMA_8x8_NEW" );
DTRACE_V( c8x8Idx.b8x8Index() );
DTRACE_V( uiScanIndex );
DTRACE_N;
rcMbDataAccessBase.getMbData().setBCBP( c8x8Idx.b4x4(), 1 );
rcMbDataAccessBase.getMbData().setBCBP( c8x8Idx.b4x4()+1, 1 );
rcMbDataAccessBase.getMbData().setBCBP( c8x8Idx.b4x4()+4, 1 );
rcMbDataAccessBase.getMbData().setBCBP( c8x8Idx.b4x4()+5, 1 );
RNOK( xRQdecodeNewTCoeffs( piCoeff, piCoeffBase, 64, 2, 2, pucScan, uiScanIndex, rbLast, ruiNumCoefRead, pos2ctx_last8x8, pos2ctx_map8x8, 4 ) );
return Err::m_nOK;
}
ErrVal
CabacReader::RQdecodeTCoeffRef_8x8( MbDataAccess& rcMbDataAccess,
MbDataAccess& rcMbDataAccessBase,
B8x8Idx c8x8Idx,
UInt uiScanIndex )
{
TCoeff* piCoeff = rcMbDataAccess .getMbTCoeffs().get8x8( c8x8Idx );
TCoeff* piCoeffBase = rcMbDataAccessBase.getMbTCoeffs().get8x8( c8x8Idx );
const UChar* pucScan = g_aucFrameScan64;
DTRACE_T( "LUMA_8x8_REF" );
DTRACE_V( c8x8Idx.b8x8Index() );
DTRACE_V( uiScanIndex );
DTRACE_N;
UInt uiSig = 0;
RNOK( CabaDecoder::getSymbol( uiSig, m_cRefCCModel.get( 0, 0 ) ) );
if( uiSig )
{
UInt uiSymbol = 0;
RNOK( CabaDecoder::getSymbol( uiSymbol, m_cRefCCModel.get( 0, 1 ) ) );
UInt uiSignBL = ( piCoeffBase[pucScan[uiScanIndex]] < 0 ? 1 : 0 );
UInt uiSignEL = ( uiSignBL ^ uiSymbol );
piCoeff[pucScan[uiScanIndex]] = ( uiSig ? ( uiSignEL ? -1 : 1 ) : 0 );
}
return Err::m_nOK;
}
ErrVal
CabacReader::RQdecodeNewTCoeff_Luma ( MbDataAccess& rcMbDataAccess,
MbDataAccess& rcMbDataAccessBase,
ResidualMode eResidualMode,
LumaIdx cIdx,
UInt uiScanIndex,
Bool& rbLast,
UInt& ruiNumCoefRead )
{
TCoeff* piCoeff = rcMbDataAccess .getMbTCoeffs().get( cIdx );
TCoeff* piCoeffBase = rcMbDataAccessBase.getMbTCoeffs().get( cIdx );
const UChar* pucScan = g_aucFrameScan;
//UInt uiStart = 0; // unused variable. mwi
UInt uiStop = 16;
ROT( piCoeffBase[pucScan[uiScanIndex]] );
DTRACE_T( "LUMA_4x4_NEW" );
DTRACE_V( cIdx.b4x4() );
DTRACE_V( uiScanIndex );
DTRACE_N;
RNOK( xRQdecodeNewTCoeffs( piCoeff, piCoeffBase, uiStop, type2ctx1[eResidualMode], type2ctx2[eResidualMode], pucScan, uiScanIndex, rbLast, ruiNumCoefRead ) );
return Err::m_nOK;
}
ErrVal
CabacReader::RQdecodeTCoeffRef_Luma ( MbDataAccess& rcMbDataAccess,
MbDataAccess& rcMbDataAccessBase,
LumaIdx cIdx,
UInt uiScanIndex )
{
TCoeff* piCoeff = rcMbDataAccess .getMbTCoeffs().get( cIdx );
TCoeff* piCoeffBase = rcMbDataAccessBase.getMbTCoeffs().get( cIdx );
const UChar* pucScan = g_aucFrameScan;
DTRACE_T( "LUMA_4x4_REF" );
DTRACE_V( cIdx.b4x4() );
DTRACE_V( uiScanIndex );
DTRACE_N;
RNOK( xRQdecodeTCoeffsRef( piCoeff, piCoeffBase, pucScan, uiScanIndex ) );
return Err::m_nOK;
}
ErrVal
CabacReader::RQdecodeNewTCoeff_Chroma ( MbDataAccess& rcMbDataAccess,
MbDataAccess& rcMbDataAccessBase,
ResidualMode eResidualMode,
ChromaIdx cIdx,
UInt uiScanIndex,
Bool& rbLast,
UInt& ruiNumCoefRead )
{
// == Nokia, m11509
//ruiLast = 0;
// ==
TCoeff* piCoeff = rcMbDataAccess .getMbTCoeffs().get( cIdx );
TCoeff* piCoeffBase = rcMbDataAccessBase.getMbTCoeffs().get( cIdx );
const UChar* pucScan = ( eResidualMode == CHROMA_DC ? g_aucIndexChromaDCScan : g_aucFrameScan );
//UInt uiStart = ( eResidualMode == CHROMA_AC ? 1 : 0 ); // unused variable. mwi
UInt uiStop = ( eResidualMode == CHROMA_DC ? 4 : 16 );
ROT( piCoeffBase[pucScan[uiScanIndex]] );
DTRACE_T( "CHROMA_4x4_NEW" );
DTRACE_V( cIdx );
DTRACE_V( uiScanIndex );
DTRACE_N;
RNOK( xRQdecodeNewTCoeffs( piCoeff, piCoeffBase, uiStop, type2ctx1[eResidualMode], type2ctx2[eResidualMode], pucScan, uiScanIndex, rbLast, ruiNumCoefRead ) );
return Err::m_nOK;
}
ErrVal
CabacReader::RQdecodeTCoeffRef_Chroma ( MbDataAccess& rcMbDataAccess,
MbDataAccess& rcMbDataAccessBase,
ResidualMode eResidualMode,
ChromaIdx cIdx,
UInt uiScanIndex )
{
TCoeff* piCoeff = rcMbDataAccess .getMbTCoeffs().get( cIdx );
TCoeff* piCoeffBase = rcMbDataAccessBase.getMbTCoeffs().get( cIdx );
const UChar* pucScan = ( eResidualMode == CHROMA_DC ? g_aucIndexChromaDCScan : g_aucFrameScan );
DTRACE_T( "CHROMA_4x4_REF" );
DTRACE_V( cIdx );
DTRACE_V( uiScanIndex );
DTRACE_N;
RNOK( xRQdecodeTCoeffsRef( piCoeff, piCoeffBase, pucScan, uiScanIndex ) );
return Err::m_nOK;
}
ErrVal
CabacReader::xRQdecodeNewTCoeffs( TCoeff* piCoeff,
TCoeff* piCoeffBase,
UInt uiStop,
UInt uiCtx1,
UInt uiCtx2,
const UChar* pucScan,
UInt uiScanIndex,
Bool& rbLast,
UInt& ruiNumCoefRead,
const int* paiCtxEobMap,
const int* paiCtxSigMap,
UInt uiStride )
{
ruiNumCoefRead = 0;
if( rbLast )
{
UInt uiSymbol;
RNOK( CabaDecoder::getSymbol( uiSymbol, m_cLastCCModel.get( uiCtx2, paiCtxEobMap[uiScanIndex-1] ) ) );
rbLast = (uiSymbol == 1);
ROTRS(rbLast, Err::m_nOK);
}
//===== SIGNIFICANCE BIT ======
UInt uiSig;
do
{
ruiNumCoefRead++;
UInt uiLastScanPosition = uiScanIndex + uiStride;
while (uiLastScanPosition < uiStop && piCoeffBase[pucScan[uiLastScanPosition]])
uiLastScanPosition += uiStride;
if (uiLastScanPosition < uiStop)
{
RNOK( CabaDecoder::getSymbol( uiSig, m_cMapCCModel.get( uiCtx2, paiCtxSigMap[uiScanIndex] ) ) );
} else {
uiSig = 1;
}
if( uiSig )
{
break;
}
uiScanIndex += uiStride;
while (uiScanIndex < uiStop && piCoeffBase[pucScan[uiScanIndex]])
uiScanIndex += uiStride;
}
while ( true );
UInt uiCoeff = uiSig;
UInt uiSign = 0;
UInt uiCtx = 1;
//===== SIGN =====
RNOK( CabaDecoder::getEpSymbol( uiSign ) );
//===== ABSOLUTE VALUE =====
RNOK( CabaDecoder::getSymbol ( uiCoeff, m_cOneCCModel.get( uiCtx1, uiCtx ) ) );
if( uiCoeff )
{
uiCtx = 0;
RNOK( CabaDecoder::getExGolombLevel( uiCoeff, m_cAbsCCModel.get( uiCtx1, uiCtx ) ) );
uiCoeff += 2;
}
else
{
uiCoeff++;
}
piCoeff[pucScan[uiScanIndex]] = ( uiSign ? -(Int)uiCoeff : (Int)uiCoeff );
return Err::m_nOK;
}
ErrVal
CabacReader::xRQdecodeTCoeffsRef( TCoeff* piCoeff,
TCoeff* piCoeffBase,
const UChar* pucScan,
UInt uiScanIndex )
{
UInt uiSig = 0;
RNOK( CabaDecoder::getSymbol( uiSig, m_cRefCCModel.get( 0, 0 ) ) );
if( uiSig )
{
UInt uiSymbol = 0;
RNOK( CabaDecoder::getSymbol( uiSymbol, m_cRefCCModel.get( 0, 1 ) ) );
UInt uiSignBL = ( piCoeffBase[pucScan[uiScanIndex]] < 0 ? 1 : 0 );
UInt uiSignEL = ( uiSignBL ^ uiSymbol );
piCoeff[pucScan[uiScanIndex]] = ( uiSig ? ( uiSignEL ? -1 : 1 ) : 0 );
}
return Err::m_nOK;
}
// == Nokia, m11509
ErrVal
CabacReader::RQdecodeCycleSymbol( UInt& uiCycle )
{
UInt itSymbol;
RNOK( CabaDecoder::getEpSymbol( itSymbol ) );
// Changed mapping to match syntax in WD (justin.ridge@nokia.com)
uiCycle = 1 + itSymbol;
if (itSymbol == 1) {
RNOK( CabaDecoder::getEpSymbol( itSymbol ) );
uiCycle += itSymbol;
}
// heiko.schwarz@hhi.fhg.de: return added
return Err::m_nOK;
}
// ==
H264AVC_NAMESPACE_END
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