diff --git a/cfg/encoder_randomaccess_vtm.cfg b/cfg/encoder_randomaccess_vtm.cfg
index c3b70fe2b03a4e986411e633b68e2f7adb0a8c2a..673977990b4040248efa1770fcb435e3d4b5e35a 100644
--- a/cfg/encoder_randomaccess_vtm.cfg
+++ b/cfg/encoder_randomaccess_vtm.cfg
@@ -150,6 +150,7 @@ AffineAmvr : 1
LMCSEnable : 1 # LMCS: 0: disable, 1:enable
LMCSSignalType : 0 # Input signal type: 0:SDR, 1:HDR-PQ, 2:HDR-HLG
LMCSUpdateCtrl : 0 # LMCS model update control: 0:RA, 1:AI, 2:LDB/LDP
+LMCSoffset : 6 # chroma residual scaling offset
MIP : 1
DMVR : 1
SMVD : 1
diff --git a/cfg/per-class/classH1.cfg b/cfg/per-class/classH1.cfg
index e7cefecf655c6684755617e8048d0e9dca006003..afde72f0bc268310eafa3fd442eaf0a829b1fbe8 100644
--- a/cfg/per-class/classH1.cfg
+++ b/cfg/per-class/classH1.cfg
@@ -5,6 +5,7 @@ isSDR : 0 # 1: SDR in PQ container, 0: HDR
# ======= LMCS =======================
LMCSEnable : 1 # turned on in HDR CTC
LMCSSignalType : 1 # Input signal type: 0:SDR, 1:HDR-PQ, 2:HDR-HLG
+LMCSoffset : 1 # chroma residual scaling offset
#======== Chroma QP scale ============
WCGPPSEnable : 0 # enable WCG Chroma scale
diff --git a/source/App/EncoderApp/EncApp.cpp b/source/App/EncoderApp/EncApp.cpp
index a774e69e169353242cbcaf428fa2cd0404a2e4d8..19148d5bb954824c05ab253b861cf445f729eef6 100644
--- a/source/App/EncoderApp/EncApp.cpp
+++ b/source/App/EncoderApp/EncApp.cpp
@@ -637,6 +637,9 @@ void EncApp::xInitLibCfg()
m_cEncLib.setReshapeSignalType ( m_reshapeSignalType );
m_cEncLib.setReshapeIntraCMD ( m_intraCMD );
m_cEncLib.setReshapeCW ( m_reshapeCW );
+#if JVET_P0371_CHROMA_SCALING_OFFSET
+ m_cEncLib.setReshapeCSoffset ( m_CSoffset );
+#endif
#if JVET_O0756_CALCULATE_HDRMETRICS
for (int i=0; i<hdrtoolslib::NB_REF_WHITE; i++)
diff --git a/source/App/EncoderApp/EncAppCfg.cpp b/source/App/EncoderApp/EncAppCfg.cpp
index 550b9c605c1ece48907a6faff15f935538edfe14..5b5784bac011f1bc0ea8d8fd57a1fe4afd5dc9de 100644
--- a/source/App/EncoderApp/EncAppCfg.cpp
+++ b/source/App/EncoderApp/EncAppCfg.cpp
@@ -993,6 +993,9 @@ bool EncAppCfg::parseCfg( int argc, char* argv[] )
"1: rsp both (CW66 for QP<=22), 2: rsp TID0 (for all QP),"
"3: rsp inter(CW66 for QP<=22), 4: rsp inter(for all QP).")
("LMCSInitialCW", m_initialCW, 0u, "LMCS initial total codeword (0~1023) when LMCSAdpOption > 0")
+#if JVET_P0371_CHROMA_SCALING_OFFSET
+ ("LMCSOffset", m_CSoffset, 0, "LMCS chroma residual scaling offset")
+#endif
("IntraCMD", m_intraCMD, 0u, "IntraChroma MD: 0: none, 1:fixed to default wPSNR weight")
("LCTUFast", m_useFastLCTU, false, "Fast methods for large CTU")
("FastMrg", m_useFastMrg, false, "Fast methods for inter merge")
@@ -2709,6 +2712,10 @@ bool EncAppCfg::xCheckParameter()
xConfirmPara(m_adpOption > 4, "Max. LMCS Adaptation Option is 4");
xConfirmPara(m_initialCW < 0, "Min. Initial Total Codeword is 0");
xConfirmPara(m_initialCW > 1023, "Max. Initial Total Codeword is 1023");
+#if JVET_P0371_CHROMA_SCALING_OFFSET
+ xConfirmPara(m_CSoffset < -7, "Min. LMCS Offset value is -7");
+ xConfirmPara(m_CSoffset > 7, "Max. LMCS Offset value is 7");
+#endif
if (m_updateCtrl > 0 && m_adpOption > 2) { m_adpOption -= 2; }
}
@@ -3718,6 +3725,9 @@ void EncAppCfg::xPrintParameter()
msg(VERBOSE, "(Signal:%s ", m_reshapeSignalType == 0 ? "SDR" : (m_reshapeSignalType == 2 ? "HDR-HLG" : "HDR-PQ"));
msg(VERBOSE, "Opt:%d", m_adpOption);
if (m_adpOption > 0) { msg(VERBOSE, " CW:%d", m_initialCW); }
+#if JVET_P0371_CHROMA_SCALING_OFFSET
+ msg(VERBOSE, " CSoffset:%d", m_CSoffset);
+#endif
msg(VERBOSE, ") ");
}
msg(VERBOSE, "MIP:%d ", m_MIP);
diff --git a/source/App/EncoderApp/EncAppCfg.h b/source/App/EncoderApp/EncAppCfg.h
index c6493979f36b0833d07d020a4f460b7f17d08c3e..76ae65dd96eea0e4e4c3a3bf28d4e922745a3134 100644
--- a/source/App/EncoderApp/EncAppCfg.h
+++ b/source/App/EncoderApp/EncAppCfg.h
@@ -332,6 +332,9 @@ protected:
int m_updateCtrl;
int m_adpOption;
uint32_t m_initialCW;
+#if JVET_P0371_CHROMA_SCALING_OFFSET
+ int m_CSoffset;
+#endif
bool m_encDbOpt;
unsigned m_uiMaxCUWidth; ///< max. CU width in pixel
unsigned m_uiMaxCUHeight; ///< max. CU height in pixel
diff --git a/source/Lib/CommonLib/Reshape.cpp b/source/Lib/CommonLib/Reshape.cpp
index 40a5ed72316c760025a4dfd9159d668c520ccf8d..c029fec70bc1c98171db6f1da5c60139639bc0d6 100644
--- a/source/Lib/CommonLib/Reshape.cpp
+++ b/source/Lib/CommonLib/Reshape.cpp
@@ -225,6 +225,9 @@ void Reshape::copySliceReshaperInfo(SliceReshapeInfo& tInfo, SliceReshapeInfo& s
tInfo.reshaperModelMinBinIdx = sInfo.reshaperModelMinBinIdx;
memcpy(tInfo.reshaperModelBinCWDelta, sInfo.reshaperModelBinCWDelta, sizeof(int)*(PIC_CODE_CW_BINS));
tInfo.maxNbitsNeededDeltaCW = sInfo.maxNbitsNeededDeltaCW;
+#if JVET_P0371_CHROMA_SCALING_OFFSET
+ tInfo.chrResScalingOffset = sInfo.chrResScalingOffset;
+#endif
}
tInfo.sliceReshaperEnableFlag = sInfo.sliceReshaperEnableFlag;
if (sInfo.sliceReshaperEnableFlag)
@@ -262,7 +265,11 @@ void Reshape::constructReshaper()
else
{
m_invScaleCoef[i] = (int32_t)(m_initCW * (1 << FP_PREC) / m_binCW[i]);
+#if JVET_P0371_CHROMA_SCALING_OFFSET
+ m_chromaAdjHelpLUT[i] = (int32_t)(m_initCW * (1 << FP_PREC) / ( m_binCW[i] + m_sliceReshapeInfo.chrResScalingOffset ) );
+#else
m_chromaAdjHelpLUT[i] = m_invScaleCoef[i];
+#endif
}
}
for (int lumaSample = 0; lumaSample < m_reshapeLUTSize; lumaSample++)
diff --git a/source/Lib/CommonLib/Slice.h b/source/Lib/CommonLib/Slice.h
index c0d36fcd88c380e8f29e08c15b9cfcf88e8a0f22..ec635575a1d7437b6d36aa0983ad66a9eee95552 100644
--- a/source/Lib/CommonLib/Slice.h
+++ b/source/Lib/CommonLib/Slice.h
@@ -451,6 +451,9 @@ public:
uint32_t reshaperModelMaxBinIdx;
int reshaperModelBinCWDelta[PIC_CODE_CW_BINS];
int maxNbitsNeededDeltaCW;
+#if JVET_P0371_CHROMA_SCALING_OFFSET
+ int chrResScalingOffset;
+#endif
void setUseSliceReshaper(bool b) { sliceReshaperEnableFlag = b; }
bool getUseSliceReshaper() const { return sliceReshaperEnableFlag; }
void setSliceReshapeModelPresentFlag(bool b) { sliceReshaperModelPresentFlag = b; }
@@ -484,6 +487,12 @@ public:
{
return false;
}
+#if JVET_P0371_CHROMA_SCALING_OFFSET
+ if (chrResScalingOffset != other.chrResScalingOffset)
+ {
+ return false;
+ }
+#endif
if( memcmp( reshaperModelBinCWDelta, other.reshaperModelBinCWDelta, sizeof( reshaperModelBinCWDelta ) ) )
{
return false;
diff --git a/source/Lib/CommonLib/TypeDef.h b/source/Lib/CommonLib/TypeDef.h
index e4cfb8d141dc78d406f1ebc0aa80a4f2808ffdc0..d7b01ffb56e7e5965c5788c52d021674ed3ca8aa 100644
--- a/source/Lib/CommonLib/TypeDef.h
+++ b/source/Lib/CommonLib/TypeDef.h
@@ -53,6 +53,7 @@
#define JVET_P0345_LD_GOP_8 1 // JVET-P0345: low-delay gop size 8
+#define JVET_P0371_CHROMA_SCALING_OFFSET 1 // JVET-P0371: Signalling offset for chroma residual scaling
#define JVET_P0803_COMBINED_MIP_CLEANUP 1 // JVET-P0803: Several MIP cleanups
#define JVET_P0199_P0289_P0303_MIP_FULLMATRIX 1 // JVET-P0199/P0289/P0303: Full matrix multiplication for all MIP block shapes
diff --git a/source/Lib/DecoderLib/DecLib.cpp b/source/Lib/DecoderLib/DecLib.cpp
index 58b680f472034e721f325330d8228222af96004f..051d1d161dfe181542067fcf0d5c8ce93a3159ad 100644
--- a/source/Lib/DecoderLib/DecLib.cpp
+++ b/source/Lib/DecoderLib/DecLib.cpp
@@ -1534,6 +1534,9 @@ bool DecLib::xDecodeSlice(InputNALUnit &nalu, int &iSkipFrame, int iPOCLastDispl
tInfo.reshaperModelMinBinIdx = sInfo.reshaperModelMinBinIdx;
memcpy(tInfo.reshaperModelBinCWDelta, sInfo.reshaperModelBinCWDelta, sizeof(int)*(PIC_CODE_CW_BINS));
tInfo.maxNbitsNeededDeltaCW = sInfo.maxNbitsNeededDeltaCW;
+#if JVET_P0371_CHROMA_SCALING_OFFSET
+ tInfo.chrResScalingOffset = sInfo.chrResScalingOffset;
+#endif
tInfo.setUseSliceReshaper(pcSlice->getLmcsEnabledFlag());
tInfo.setSliceReshapeChromaAdj(pcSlice->getLmcsChromaResidualScaleFlag());
tInfo.setSliceReshapeModelPresentFlag(true);
diff --git a/source/Lib/DecoderLib/VLCReader.cpp b/source/Lib/DecoderLib/VLCReader.cpp
index 0e695a0f891385fdf056a233b952652009ecf9b3..3687b17bf2754744f9bcfcb5ae83db0b49028ecb 100644
--- a/source/Lib/DecoderLib/VLCReader.cpp
+++ b/source/Lib/DecoderLib/VLCReader.cpp
@@ -1004,6 +1004,17 @@ void HLSyntaxReader::parseLmcsAps( APS* aps )
int signCW = code;
info.reshaperModelBinCWDelta[i] = (1 - 2 * signCW) * absCW;
}
+#if JVET_P0371_CHROMA_SCALING_OFFSET
+ READ_CODE(3, code, "lmcs_delta_abs_crs");
+ int absCW = code;
+ if (absCW > 0)
+ {
+ READ_CODE(1, code, "lmcs_delta_sign_crs_flag");
+ }
+ int signCW = code;
+ info.chrResScalingOffset = (1 - 2 * signCW) * absCW;
+#endif
+
aps->setReshaperAPSInfo(info);
}
diff --git a/source/Lib/EncoderLib/EncCfg.h b/source/Lib/EncoderLib/EncCfg.h
index feb45aadf93a4c8cf65471b1d023056721dfb63e..16eaf368d495b8e14ce01fbab07ac3ea5c91adab 100644
--- a/source/Lib/EncoderLib/EncCfg.h
+++ b/source/Lib/EncoderLib/EncCfg.h
@@ -340,6 +340,9 @@ protected:
unsigned m_reshapeSignalType;
unsigned m_intraCMD;
ReshapeCW m_reshapeCW;
+#if JVET_P0371_CHROMA_SCALING_OFFSET
+ int m_CSoffset;
+#endif
bool m_encDbOpt;
bool m_useFastLCTU;
bool m_useFastMrg;
@@ -991,6 +994,10 @@ public:
uint32_t getReshapeIntraCMD () { return m_intraCMD; }
void setReshapeCW (const ReshapeCW &reshapeCW) { m_reshapeCW = reshapeCW; }
const ReshapeCW& getReshapeCW () { return m_reshapeCW; }
+#if JVET_P0371_CHROMA_SCALING_OFFSET
+ void setReshapeCSoffset (int CSoffset) { m_CSoffset = CSoffset; }
+ int getReshapeCSoffset () { return m_CSoffset; }
+#endif
void setMaxCUWidth ( uint32_t u ) { m_maxCUWidth = u; }
uint32_t getMaxCUWidth () const { return m_maxCUWidth; }
void setMaxCUHeight ( uint32_t u ) { m_maxCUHeight = u; }
diff --git a/source/Lib/EncoderLib/EncGOP.cpp b/source/Lib/EncoderLib/EncGOP.cpp
index d51c70c99cd35b31f31262fe72755c613b3a13e9..85f895a324f2a75ff386b2959423c31e8e3d0068 100644
--- a/source/Lib/EncoderLib/EncGOP.cpp
+++ b/source/Lib/EncoderLib/EncGOP.cpp
@@ -1753,6 +1753,10 @@ void EncGOP::xPicInitLMCS(Picture *pic, Slice *slice)
m_pcReshaper->setSrcReshaped(false);
m_pcReshaper->setRecReshaped(true);
+#if JVET_P0371_CHROMA_SCALING_OFFSET
+ m_pcReshaper->getSliceReshaperInfo().chrResScalingOffset = m_pcCfg->getReshapeCSoffset();
+#endif
+
if (m_pcCfg->getReshapeSignalType() == RESHAPE_SIGNAL_PQ)
{
m_pcReshaper->preAnalyzerHDR(pic, sliceType, m_pcCfg->getReshapeCW(), m_pcCfg->getDualITree());
@@ -1854,6 +1858,9 @@ void EncGOP::xPicInitLMCS(Picture *pic, Slice *slice)
tInfo.reshaperModelMinBinIdx = sInfo.reshaperModelMinBinIdx;
memcpy(tInfo.reshaperModelBinCWDelta, sInfo.reshaperModelBinCWDelta, sizeof(int)*(PIC_CODE_CW_BINS));
tInfo.maxNbitsNeededDeltaCW = sInfo.maxNbitsNeededDeltaCW;
+#if JVET_P0371_CHROMA_SCALING_OFFSET
+ tInfo.chrResScalingOffset = sInfo.chrResScalingOffset;
+#endif
m_pcEncLib->getApsMap()->setChangedFlag((lmcsAPS->getAPSId() << NUM_APS_TYPE_LEN) + LMCS_APS);
}
diff --git a/source/Lib/EncoderLib/EncReshape.cpp b/source/Lib/EncoderLib/EncReshape.cpp
index b92b0cdb46b4da91a6835d9046c3a23045cae6d3..034d6b11907b8ee5ee986491b32c14b039c3ac12 100644
--- a/source/Lib/EncoderLib/EncReshape.cpp
+++ b/source/Lib/EncoderLib/EncReshape.cpp
@@ -93,6 +93,9 @@ void EncReshape::createEnc(int picWidth, int picHeight, uint32_t maxCUWidth, ui
m_sliceReshapeInfo.reshaperModelMinBinIdx = 0;
m_sliceReshapeInfo.reshaperModelMaxBinIdx = PIC_CODE_CW_BINS - 1;
memset(m_sliceReshapeInfo.reshaperModelBinCWDelta, 0, (PIC_CODE_CW_BINS) * sizeof(int));
+#if JVET_P0371_CHROMA_SCALING_OFFSET
+ m_sliceReshapeInfo.chrResScalingOffset = 0;
+#endif
m_picWidth = picWidth;
m_picHeight = picHeight;
@@ -962,7 +965,11 @@ void EncReshape::initLUTfromdQPModel()
else
{
m_invScaleCoef[i] = (int32_t)(m_initCW * (1 << FP_PREC) / m_binCW[i]);
+#if JVET_P0371_CHROMA_SCALING_OFFSET
+ m_chromaAdjHelpLUT[i] = (int32_t)(m_initCW * (1 << FP_PREC) / (m_binCW[i] + m_sliceReshapeInfo.chrResScalingOffset));
+#else
m_chromaAdjHelpLUT[i] = m_invScaleCoef[i];
+#endif
}
}
for (int lumaSample = 0; lumaSample < m_reshapeLUTSize; lumaSample++)
@@ -1054,7 +1061,11 @@ void EncReshape::constructReshaperLMCS()
else
{
m_invScaleCoef[i] = (int32_t)(m_initCW * (1 << FP_PREC) / m_binCW[i]);
+#if JVET_P0371_CHROMA_SCALING_OFFSET
+ m_chromaAdjHelpLUT[i] = (int32_t)(m_initCW * (1 << FP_PREC) / (m_binCW[i] + m_sliceReshapeInfo.chrResScalingOffset));
+#else
m_chromaAdjHelpLUT[i] = m_invScaleCoef[i];
+#endif
}
}
for (int lumaSample = 0; lumaSample < m_reshapeLUTSize; lumaSample++)
diff --git a/source/Lib/EncoderLib/VLCWriter.cpp b/source/Lib/EncoderLib/VLCWriter.cpp
index 023d0a90c7e8f632f37134fbb2a20e84c32b5b9b..31005a474e413a1e4ebbd2e8c3d2ab0eb084e993 100644
--- a/source/Lib/EncoderLib/VLCWriter.cpp
+++ b/source/Lib/EncoderLib/VLCWriter.cpp
@@ -579,6 +579,16 @@ void HLSWriter::codeLmcsAps( APS* pcAPS )
WRITE_FLAG(signCW, "lmcs_delta_sign_cw_flag[ i ]");
}
}
+#if JVET_P0371_CHROMA_SCALING_OFFSET
+ int deltaCRS = param.chrResScalingOffset;
+ int signCRS = (deltaCRS < 0) ? 1 : 0;
+ int absCRS = (deltaCRS < 0) ? (-deltaCRS) : deltaCRS;
+ WRITE_CODE(absCRS, 3, "lmcs_delta_crs_val");
+ if (absCRS > 0)
+ {
+ WRITE_FLAG(signCRS, "lmcs_delta_crs_val_flag");
+ }
+#endif
}
void HLSWriter::codeScalingListAps( APS* pcAPS )