/work/vvenc/source/Lib/EncoderLib/VLCWriter.cpp

Source
/* -----------------------------------------------------------------------------
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other Intellectual Property Rights other than the copyrights concerning 
the Software are granted under this license.

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/** \file     VLCWriter.cpp
 *  \brief    Writer for high level syntax
 */

#include "VLCWriter.h"
#include "SEIwrite.h"
#include "CommonLib/CommonDef.h"
#include "CommonLib/Unit.h"
#include "CommonLib/Picture.h" // th remove this
#include "CommonLib/dtrace_next.h"

//! \ingroup EncoderLib
//! \{

namespace vvenc {

#if ENABLE_TRACING

void  VLCWriter::xWriteSCodeTr (int value, uint32_t  length, const char *pSymbolName)
{
  xWriteSCode (value,length);
  if( g_HLSTraceEnable )
  {
    if( length<10 )
    {
      DTRACE( g_trace_ctx, D_HEADER, "%-50s u(%d)  : %d\n", pSymbolName, length, value );
    }
    else
    {
      DTRACE( g_trace_ctx, D_HEADER, "%-50s u(%d) : %d\n", pSymbolName, length, value );
    }
  }
}

void  VLCWriter::xWriteCodeTr (uint32_t value, uint32_t  length, const char *pSymbolName)
{
  xWriteCode (value,length);

  if( g_HLSTraceEnable )
  {
    if( length < 10 )
    {
      DTRACE( g_trace_ctx, D_HEADER, "%-50s u(%d)  : %d\n", pSymbolName, length, value );
    }
    else
    {
      DTRACE( g_trace_ctx, D_HEADER, "%-50s u(%d) : %d\n", pSymbolName, length, value );
    }
  }
}

void  VLCWriter::xWriteUvlcTr (uint32_t value, const char *pSymbolName)
{
  xWriteUvlc (value);
  if( g_HLSTraceEnable )
  {
    DTRACE( g_trace_ctx, D_HEADER, "%-50s ue(v) : %d\n", pSymbolName, value );
  }
}

void  VLCWriter::xWriteSvlcTr (int value, const char *pSymbolName)
{
  xWriteSvlc(value);
  if( g_HLSTraceEnable )
  {
    DTRACE( g_trace_ctx, D_HEADER, "%-50s se(v) : %d\n", pSymbolName, value );
  }
}

void  VLCWriter::xWriteFlagTr(bool flag, const char *pSymbolName)
{
  xWriteFlag(flag);
  if( g_HLSTraceEnable )
  {
    DTRACE( g_trace_ctx, D_HEADER, "%-50s u(1)  : %d\n", pSymbolName, flag?1:0 );
  }
}

bool g_HLSTraceEnable = true;

#endif

void VLCWriter::xWriteSCode    ( int code, uint32_t length )
{
  assert ( length > 0 && length<=32 );
  assert( length==32 || (code>=-(1<<(length-1)) && code<(1<<(length-1))) );
  m_pcBitIf->write( length==32 ? uint32_t(code) : ( uint32_t(code)&((1<<length)-1) ), length );
}

void VLCWriter::xWriteCode     ( uint32_t uiCode, uint32_t uiLength )
{
  CHECK( uiLength == 0, "Code of length '0' not supported" );
  m_pcBitIf->write( uiCode, uiLength );
}

void VLCWriter::xWriteUvlc     ( uint32_t uiCode )
{
  uint32_t uiLength = 1;
  uint32_t uiTemp = ++uiCode;

  CHECK( !uiTemp, "Integer overflow" );

  while( 1 != uiTemp )
  {
    uiTemp >>= 1;
    uiLength += 2;
  }
  // Take care of cases where uiLength > 32
  m_pcBitIf->write( 0, uiLength >> 1);
  m_pcBitIf->write( uiCode, (uiLength+1) >> 1);
}

void VLCWriter::xWriteSvlc     ( int iCode )
{
  uint32_t uiCode = uint32_t( iCode <= 0 ? (-iCode)<<1 : (iCode<<1)-1);
  xWriteUvlc( uiCode );
}

void VLCWriter::xWriteFlag( bool flag )
{
  m_pcBitIf->write( flag?1:0, 1 );
}

void VLCWriter::xWriteRbspTrailingBits()
{
  WRITE_FLAG( 1, "rbsp_stop_one_bit");
  int cnt = 0;
  while (m_pcBitIf->getNumBitsUntilByteAligned())
  {
    WRITE_FLAG( 0, "rbsp_alignment_zero_bit");
    cnt++;
  }
  CHECK(cnt>=8, "More than '8' alignment bytes read");
}

void HLSWriter::codeAUD(const int audIrapOrGdrAuFlag, const int pictureType)
{
  DTRACE( g_trace_ctx, D_HEADER, "=========== Access Unit Delimiter ===========\n" );

  CHECK(pictureType >= 3, "Invalid picture type");
  WRITE_FLAG(audIrapOrGdrAuFlag, "aud_irap_or_gdr_au_flag");
  WRITE_CODE(pictureType, 3, "pic_type");
  xWriteRbspTrailingBits();
}

void HLSWriter::xCodeRefPicList( const ReferencePictureList* rpl, bool isLongTermPresent, uint32_t ltLsbBitsCount, const bool isForbiddenZeroDeltaPoc, int rplIdx )
{
  uint32_t numRefPic = rpl->numberOfShorttermPictures + rpl->numberOfLongtermPictures + rpl->numberOfInterLayerPictures;
  WRITE_UVLC(numRefPic, "num_ref_entries[ listIdx ][ rplsIdx ]");

  if (isLongTermPresent && numRefPic > 0 && rplIdx != -1)
  {
    WRITE_FLAG(rpl->ltrpInSliceHeader, "ltrp_in_slice_header_flag[ listIdx ][ rplsIdx ]");
  }
  int prevDelta = MAX_INT;
  int deltaValue = 0;
  bool firstSTRP = true;
  for (int ii = 0; ii < numRefPic; ii++)
  {
    if( rpl->interLayerPresent )
    {
      WRITE_FLAG( rpl->isInterLayerRefPic[ii], "inter_layer_ref_pic_flag[ listIdx ][ rplsIdx ][ i ]" );

      if( rpl->isInterLayerRefPic[ii] )
      {
        CHECK( rpl->interLayerRefPicIdx[ii] < 0, "Wrong inter-layer reference index" );
        WRITE_UVLC( rpl->interLayerRefPicIdx[ii], "ilrp_idx[ listIdx ][ rplsIdx ][ i ]" );
      }
    }

    if( !rpl->isInterLayerRefPic[ii] )
    {
      if (isLongTermPresent)
      {
        WRITE_FLAG(!rpl->isLongtermRefPic[ii], "st_ref_pic_flag[ listIdx ][ rplsIdx ][ i ]");
      }
      if (!rpl->isLongtermRefPic[ii])
      {
        if (firstSTRP)
        {
          firstSTRP = false;
          deltaValue = prevDelta = rpl->refPicIdentifier[ii];
        }
        else
        {
          deltaValue = rpl->refPicIdentifier[ii] - prevDelta;
          prevDelta = rpl->refPicIdentifier[ii];
        }
        unsigned int absDeltaValue = (deltaValue < 0) ? 0 - deltaValue : deltaValue;
        if( isForbiddenZeroDeltaPoc || ii == 0 )
        {
          CHECK( !absDeltaValue, "Zero delta POC is not used without WP" );
          WRITE_UVLC( absDeltaValue - 1, "abs_delta_poc_st[ listIdx ][ rplsIdx ][ i ]" );
        }
        else
        WRITE_UVLC(absDeltaValue, "abs_delta_poc_st[ listIdx ][ rplsIdx ][ i ]");
        if (absDeltaValue > 0)
        {
          WRITE_FLAG((deltaValue < 0), "strp_entry_sign_flag[ listIdx ][ rplsIdx ][ i ]");  //0  means negative delta POC : 1 means positive
        }
      }
      else if (!rpl->ltrpInSliceHeader)
      {
        WRITE_CODE(rpl->refPicIdentifier[ii], ltLsbBitsCount, "poc_lsb_lt[listIdx][rplsIdx][i]");
      }
    }
  }
}

void HLSWriter::codePPS( const PPS* pcPPS, const SPS* pcSPS )
{
  DTRACE( g_trace_ctx, D_HEADER, "=========== Picture Parameter Set  ===========\n" );

  WRITE_CODE( pcPPS->ppsId, 6,                        "pps_pic_parameter_set_id" );
  WRITE_CODE( pcPPS->spsId, 4,                        "pps_seq_parameter_set_id" );

  WRITE_FLAG( pcPPS->mixedNaluTypesInPic,             "pps_mixed_nalu_types_in_pic_flag" );

  WRITE_UVLC( pcPPS->picWidthInLumaSamples,           "pic_width_in_luma_samples" );
  WRITE_UVLC( pcPPS->picHeightInLumaSamples,          "pic_height_in_luma_samples" );

  if( pcPPS->picWidthInLumaSamples == pcSPS->maxPicWidthInLumaSamples && pcPPS->picHeightInLumaSamples == pcSPS->maxPicHeightInLumaSamples )
  {
    WRITE_FLAG( 0,                                    "pps_conformance_window_flag" );
  }
  else
  {
    const Window& conf = pcPPS->conformanceWindow;
    WRITE_FLAG( conf.enabledFlag,                     "pps_conformance_window_flag" );
    if( conf.enabledFlag )
    {
      WRITE_UVLC( conf.winLeftOffset   / SPS::getWinUnitX(pcSPS->chromaFormatIdc ), "conf_win_left_offset" );
      WRITE_UVLC( conf.winRightOffset  / SPS::getWinUnitX(pcSPS->chromaFormatIdc ), "conf_win_right_offset" );
      WRITE_UVLC( conf.winTopOffset    / SPS::getWinUnitY(pcSPS->chromaFormatIdc ), "conf_win_top_offset" );
      WRITE_UVLC( conf.winBottomOffset / SPS::getWinUnitY(pcSPS->chromaFormatIdc ), "conf_win_bottom_offset" );
    }
  }

  const Window& scWnd = pcPPS->scalingWindow;
  WRITE_FLAG( scWnd.enabledFlag,                      "pps_scaling_window_flag" );
  if( scWnd.enabledFlag )
  {
    WRITE_UVLC( scWnd.winLeftOffset   / SPS::getWinUnitX(pcSPS->chromaFormatIdc ), "pps_scaling_win_left_offset" );
    WRITE_UVLC( scWnd.winRightOffset  / SPS::getWinUnitX(pcSPS->chromaFormatIdc ), "pps_scaling_win_right_offset" );
    WRITE_UVLC( scWnd.winTopOffset    / SPS::getWinUnitY(pcSPS->chromaFormatIdc ), "pps_scaling_win_top_offset" );
    WRITE_UVLC( scWnd.winBottomOffset / SPS::getWinUnitY(pcSPS->chromaFormatIdc ), "pps_scaling_win_bottom_offset" );
  }

  WRITE_FLAG( pcPPS->outputFlagPresent,               "pps_output_flag_present_flag" );
  WRITE_FLAG( pcPPS->noPicPartition,                  "pps_no_pic_partition_flag" );
  WRITE_FLAG( pcPPS->subPicIdMappingInPps,            "pps_subpic_id_mapping_in_pps_flag" );
  if( pcPPS->subPicIdMappingInPps )
  {
    if( pcPPS->noPicPartition )
    {
      WRITE_UVLC( pcPPS->numSubPics - 1,              "pps_num_subpics_minus1" );
    }
    WRITE_UVLC( pcPPS->subPicIdLen - 1,               "pps_subpic_id_len_minus1" );

    CHECK((1 << pcPPS->subPicIdLen) < pcPPS->numSubPics, "pps_subpic_id_len exceeds valid range");
    for( int picIdx = 0; picIdx < pcPPS->numSubPics; picIdx++ )
    {
      WRITE_CODE( pcPPS->subPicId[picIdx], pcPPS->subPicIdLen, "pps_subpic_id[i]" );
    }
  }

  if( !pcPPS->noPicPartition )
  {
    WRITE_CODE( pcPPS->log2CtuSize - 5, 2, "pps_log2_ctu_size_minus5" );
    WRITE_UVLC( pcPPS->numExpTileCols - 1, "pps_num_exp_tile_columns_minus1" );
    WRITE_UVLC( pcPPS->numExpTileRows - 1, "pps_num_exp_tile_rows_minus1" );

    for( int colIdx = 0; colIdx < pcPPS->numExpTileCols; colIdx++ )
    {
      WRITE_UVLC( pcPPS->tileColWidth[ colIdx ] - 1,    "pps_tile_column_width_minus1[i]" );
    }
    for( int rowIdx = 0; rowIdx < pcPPS->numExpTileRows; rowIdx++ )
    {
      WRITE_UVLC( pcPPS->tileRowHeight[ rowIdx ] - 1,   "pps_tile_row_height_minus1[i]" );
    }

    if( pcPPS->numTileCols * pcPPS->numTileRows > 1 )
    {
      WRITE_FLAG( pcPPS->loopFilterAcrossTilesEnabled,  "pps_loop_filter_across_tiles_enabled_flag" );
      WRITE_FLAG( pcPPS->rectSlice ? 1 : 0,             "pps_rect_slice_flag" );
    }
    if( pcPPS->rectSlice )
    {
      WRITE_FLAG( pcPPS->singleSlicePerSubPic ? 1 : 0,  "pps_single_slice_per_subpic_flag" );
    }
    if( pcPPS->rectSlice & !pcPPS->singleSlicePerSubPic )
    {
      CHECK( pcPPS->numSlicesInPic > 1, "currently only one slice supported" );
      WRITE_UVLC( pcPPS->numSlicesInPic - 1,            "pps_num_slices_in_pic_minus1" );
    }

    if( pcPPS->rectSlice == 0 || pcPPS->singleSlicePerSubPic || pcPPS->numSlicesInPic > 1 )
    {
      WRITE_FLAG( pcPPS->loopFilterAcrossSlicesEnabled, "pps_loop_filter_across_slices_enabled_flag" );
    }
  }

  WRITE_FLAG( pcPPS->cabacInitPresent,                "pps_cabac_init_present_flag" );
  WRITE_UVLC( pcPPS->numRefIdxL0DefaultActive-1,      "pps_num_ref_idx_l0_default_active_minus1");
  WRITE_UVLC( pcPPS->numRefIdxL1DefaultActive-1,      "pps_num_ref_idx_l1_default_active_minus1");
  WRITE_FLAG( pcPPS->rpl1IdxPresent,                  "pps_rpl1_idx_present_flag");

  WRITE_FLAG( pcPPS->weightPred,                      "pps_weighted_pred_flag" );   // Use of Weighting Prediction (P_SLICE)
  WRITE_FLAG( pcPPS->weightedBiPred,                  "pps_weighted_bipred_flag" );  // Use of Weighting Bi-Prediction (B_SLICE)
  WRITE_FLAG( pcPPS->wrapAroundEnabled,               "pps_ref_wraparound_enabled_flag" );
  if( pcPPS->wrapAroundEnabled )
  {
    WRITE_UVLC(pcPPS->picWidthMinusWrapAroundOffset,  "pps_pic_width_minus_wraparound_offset");
  }

  WRITE_SVLC( pcPPS->picInitQPMinus26,                "pps_init_qp_minus26");
  WRITE_FLAG( pcPPS->useDQP,                          "pps_cu_qp_delta_enabled_flag" );
  WRITE_FLAG (pcPPS->usePPSChromaTool,                "pps_chroma_tool_offsets_present_flag");
  if (pcPPS->usePPSChromaTool)
  {
    WRITE_SVLC( pcPPS->chromaQpOffset[COMP_Cb],       "pps_cb_qp_offset" );
    WRITE_SVLC( pcPPS->chromaQpOffset[COMP_Cr],       "pps_cr_qp_offset" );
    WRITE_FLAG( pcPPS->jointCbCrQpOffsetPresent,      "pps_joint_cbcr_qp_offset_present_flag");
    if (pcPPS->jointCbCrQpOffsetPresent)
    {
      WRITE_SVLC(pcPPS->chromaQpOffset[COMP_JOINT_CbCr],"pps_joint_cbcr_qp_offset_value");
    }

    WRITE_FLAG( pcPPS->sliceChromaQpFlag,               "pps_slice_chroma_qp_offsets_present_flag" );

    bool cuChromaQpOffsetEnabled = pcPPS->chromaQpOffsetListLen>0;
    WRITE_FLAG(cuChromaQpOffsetEnabled,                 "pps_cu_chroma_qp_offset_list_enabled_flag" );
    if( cuChromaQpOffsetEnabled )
    {
      WRITE_UVLC(pcPPS->chromaQpOffsetListLen - 1,      "pps_chroma_qp_offset_list_len_minus1");
      /* skip zero index */
      for (int cuChromaQpOffsetIdx = 0; cuChromaQpOffsetIdx < pcPPS->chromaQpOffsetListLen; cuChromaQpOffsetIdx++)
      {
        WRITE_SVLC(pcPPS->getChromaQpOffsetListEntry(cuChromaQpOffsetIdx+1).u.comp.CbOffset,     "pps_cb_qp_offset_list[i]");
        WRITE_SVLC(pcPPS->getChromaQpOffsetListEntry(cuChromaQpOffsetIdx+1).u.comp.CrOffset,     "pps_cr_qp_offset_list[i]");
        if (pcPPS->jointCbCrQpOffsetPresent)
        {
          WRITE_SVLC(pcPPS->getChromaQpOffsetListEntry(cuChromaQpOffsetIdx + 1).u.comp.JointCbCrOffset, "pps_joint_cbcr_qp_offset_list[i]");
        }
      }
    }
  }
  WRITE_FLAG( pcPPS->deblockingFilterControlPresent,    "pps_deblocking_filter_control_present_flag");
  if(pcPPS->deblockingFilterControlPresent)
  {
    WRITE_FLAG( pcPPS->deblockingFilterOverrideEnabled, "pps_deblocking_filter_override_enabled_flag" );
    WRITE_FLAG( pcPPS->deblockingFilterDisabled,        "pps_deblocking_filter_disabled_flag" );
    if (!pcPPS->noPicPartition && pcPPS->deblockingFilterOverrideEnabled)
    {
      WRITE_FLAG(pcPPS->dbfInfoInPh,                    "pps_dbf_info_in_ph_flag");
    }

    if(!pcPPS->deblockingFilterDisabled )
    {
      WRITE_SVLC( pcPPS->deblockingFilterBetaOffsetDiv2[COMP_Y],            "pps_beta_offset_div2" );
      WRITE_SVLC( pcPPS->deblockingFilterTcOffsetDiv2[COMP_Y],              "pps_tc_offset_div2" );
      if( pcPPS->usePPSChromaTool )
      {
        WRITE_SVLC( pcPPS->deblockingFilterBetaOffsetDiv2[COMP_Cb],         "pps_cb_beta_offset_div2" );
        WRITE_SVLC( pcPPS->deblockingFilterTcOffsetDiv2[COMP_Cb],           "pps_cb_tc_offset_div2" );
        WRITE_SVLC( pcPPS->deblockingFilterBetaOffsetDiv2[COMP_Cr],         "pps_cr_beta_offset_div2" );
        WRITE_SVLC( pcPPS->deblockingFilterTcOffsetDiv2[COMP_Cr],           "pps_cr_tc_offset_div2" );
      }
    }
  }
  if ( !pcPPS->noPicPartition )
  {
    WRITE_FLAG(pcPPS->rplInfoInPh,                        "pps_rpl_info_in_ph_flag");
    WRITE_FLAG(pcPPS->saoInfoInPh,                        "pps_sao_info_in_ph_flag");
    WRITE_FLAG(pcPPS->alfInfoInPh,                        "pps_alf_info_in_ph_flag");
    if( (pcPPS->weightPred || pcPPS->weightedBiPred) && pcPPS->rplInfoInPh)
    {
      WRITE_FLAG(pcPPS->wpInfoInPh,                       "pps_wp_info_in_ph_flag");
    }
    WRITE_FLAG(pcPPS->qpDeltaInfoInPh,                    "pps_qp_delta_info_in_ph_flag");
  }

  WRITE_FLAG( pcPPS->pictureHeaderExtensionPresent,       "pps_picture_header_extension_present_flag");
  WRITE_FLAG( pcPPS->sliceHeaderExtensionPresent,         "pps_slice_header_extension_present_flag");

  WRITE_FLAG( false,                                      "pps_extension_present_flag" );

  xWriteRbspTrailingBits();
}

void HLSWriter::codeAPS( const APS* pcAPS )
{
  DTRACE(g_trace_ctx, D_HEADER, "=========== Adaptation Parameter Set  ===========\n");

  WRITE_CODE(pcAPS->apsType, 3,        "aps_params_type");
  WRITE_CODE(pcAPS->apsId, 5,          "adaptation_parameter_set_id");
  WRITE_FLAG(pcAPS->chromaPresent, "aps_chroma_present_flag");

  if (pcAPS->apsType == ALF_APS)
  {
    codeAlfAps(pcAPS);
  }
  else if (pcAPS->apsType == LMCS_APS)
  {
    codeLmcsAps (pcAPS );
  }
  else if( pcAPS->apsType == SCALING_LIST_APS )
  {
    THROW("no support");
  }
  else
  {
    THROW("invalid APS Type");
  }
  WRITE_FLAG(0, "aps_extension_flag");
  xWriteRbspTrailingBits();
}

void HLSWriter::codeAlfAps( const APS* pcAPS )
{
  const AlfParam& param = pcAPS->alfParam;

  WRITE_FLAG(param.newFilterFlag[CH_L],                 "alf_luma_new_filter");
  const CcAlfFilterParam& paramCcAlf = pcAPS->ccAlfParam;
  if (pcAPS->chromaPresent)
  {
    WRITE_FLAG(param.newFilterFlag[CH_C],               "alf_chroma_new_filter");
    WRITE_FLAG(paramCcAlf.newCcAlfFilter[COMP_Cb - 1],  "alf_cc_cb_filter_signal_flag");
    WRITE_FLAG(paramCcAlf.newCcAlfFilter[COMP_Cr - 1],  "alf_cc_cr_filter_signal_flag");
  }

  if (param.newFilterFlag[CH_L])
  {
    WRITE_FLAG( param.nonLinearFlag[CH_L],              "alf_luma_clip" );

    WRITE_UVLC(param.numLumaFilters - 1,                "alf_luma_num_filters_signalled_minus1");
    if (param.numLumaFilters > 1)
    {
      const int len = ceilLog2( param.numLumaFilters);
      for (int i = 0; i < MAX_NUM_ALF_CLASSES; i++)
      {
        WRITE_CODE(param.filterCoeffDeltaIdx[i], len,   "alf_luma_coeff_delta_idx" );
      }
    }
    alfFilter(param, false, 0);
  }

  if (param.newFilterFlag[CH_C])
  {
    WRITE_FLAG(param.nonLinearFlag[CH_C],               "alf_nonlinear_enable_flag_chroma");
    if( VVENC_MAX_NUM_ALF_ALTERNATIVES_CHROMA > 1 )
    {
      WRITE_UVLC( param.numAlternativesChroma - 1,      "alf_chroma_num_alts_minus1" );
    }
    for( int altIdx=0; altIdx < param.numAlternativesChroma; ++altIdx )
    {
      alfFilter(param, true, altIdx);
    }
  }

  for (int ccIdx = 0; ccIdx < 2; ccIdx++)
  {
    if (paramCcAlf.newCcAlfFilter[ccIdx])
    {
      const int filterCount = paramCcAlf.ccAlfFilterCount[ccIdx];
      CHECK(filterCount > MAX_NUM_CC_ALF_FILTERS, "CC ALF Filter count is too large");
      CHECK(filterCount == 0,                     "CC ALF Filter count is too small");

      WRITE_UVLC(filterCount - 1, ccIdx == 0 ? "alf_cc_cb_filters_signalled_minus1" : "alf_cc_cr_filters_signalled_minus1");

      for (int filterIdx = 0; filterIdx < filterCount; filterIdx++)
      {
        AlfFilterShape alfShape(size_CC_ALF);

        const short *coeff = paramCcAlf.ccAlfCoeff[ccIdx][filterIdx];
        // Filter coefficients
        for (int i = 0; i < alfShape.numCoeff - 1; i++)
        {
          if (coeff[i] == 0)
          {
            WRITE_CODE(0, CCALF_BITS_PER_COEFF_LEVEL, ccIdx == 0 ? "alf_cc_cb_mapped_coeff_abs" : "alf_cc_cr_mapped_coeff_abs");
          }
          else
          {
            WRITE_CODE(1 + floorLog2(abs(coeff[i])), CCALF_BITS_PER_COEFF_LEVEL, ccIdx == 0 ? "alf_cc_cb_mapped_coeff_abs" : "alf_cc_cr_mapped_coeff_abs");
            WRITE_FLAG(coeff[i] < 0 ? 1 : 0, ccIdx == 0 ? "alf_cc_cb_coeff_sign" : "alf_cc_cr_coeff_sign");
          }
        }

        DTRACE(g_trace_ctx, D_SYNTAX, "%s coeff filterIdx %d: ", ccIdx == 0 ? "Cb" : "Cr", filterIdx);
        for (int i = 0; i < alfShape.numCoeff; i++)
        {
          DTRACE(g_trace_ctx, D_SYNTAX, "%d ", coeff[i]);
        }
        DTRACE(g_trace_ctx, D_SYNTAX, "\n");
      }
    }
  }
}

void HLSWriter::codeLmcsAps( const APS* aps )
{
  const LmcsParam& param = aps->lmcsParam;
  WRITE_UVLC(param.reshaperModelMinBinIdx,                          "lmcs_min_bin_idx");
  WRITE_UVLC(PIC_CODE_CW_BINS - 1 - param.reshaperModelMaxBinIdx,   "lmcs_delta_max_bin_idx");
  assert(param.maxNbitsNeededDeltaCW > 0);
  WRITE_UVLC(param.maxNbitsNeededDeltaCW - 1,                       "lmcs_delta_cw_prec_minus1");

  for (int i = param.reshaperModelMinBinIdx; i <= param.reshaperModelMaxBinIdx; i++)
  {
    int deltaCW = param.reshaperModelBinCWDelta[i];
    int signCW = (deltaCW < 0) ? 1 : 0;
    int absCW = (deltaCW < 0) ? (-deltaCW) : deltaCW;
    WRITE_CODE(absCW, param.maxNbitsNeededDeltaCW,                  "lmcs_delta_abs_cw[ i ]");
    if (absCW > 0)
    {
      WRITE_FLAG(signCW,                                            "lmcs_delta_sign_cw_flag[ i ]");
    }
  }
  int deltaCRS = aps->chromaPresent ? param.chrResScalingOffset : 0;
  int signCRS = (deltaCRS < 0) ? 1 : 0;
  int absCRS = (deltaCRS < 0) ? (-deltaCRS) : deltaCRS;
  if (aps->chromaPresent)
  {
    WRITE_CODE(absCRS, 3,                                           "lmcs_delta_abs_crs");
  }
  if (absCRS > 0)
  {
    WRITE_FLAG(signCRS,                                             "lmcs_delta_sign_crs_val_flag");
  }
}

void HLSWriter::codeVUI( const VUI *pcVUI, const SPS* pcSPS )
{
#if ENABLE_TRACING
  DTRACE( g_trace_ctx, D_HEADER, "----------- vui_parameters -----------\n");
#endif

  WRITE_FLAG(pcVUI->progressiveSourceFlag,                "vui_general_progressive_source_flag"         );
  WRITE_FLAG(pcVUI->interlacedSourceFlag,                 "vui_general_interlaced_source_flag"          );
  WRITE_FLAG(pcVUI->nonPackedFlag,                        "vui_non_packed_constraint_flag");
  WRITE_FLAG(pcVUI->nonProjectedFlag,                     "vui_non_projected_constraint_flag");
  WRITE_FLAG(pcVUI->aspectRatioInfoPresent,               "aspect_ratio_info_present_flag");
  if (pcVUI->aspectRatioInfoPresent)
  {
    WRITE_FLAG(pcVUI->aspectRatioConstantFlag,            "vui_aspect_ratio_constant_flag");   
    WRITE_CODE(pcVUI->aspectRatioIdc, 8,                  "aspect_ratio_idc" );
    if (pcVUI->aspectRatioIdc == 255)
    {
      WRITE_CODE(pcVUI->sarWidth, 16,                     "sar_width");
      WRITE_CODE(pcVUI->sarHeight, 16,                    "sar_height");
    }
  }
  WRITE_FLAG(pcVUI->overscanInfoPresent,                  "vui_overscan_info_present_flag");
  if (pcVUI->overscanInfoPresent)
  {
    WRITE_FLAG(pcVUI->overscanAppropriateFlag,            "vui_overscan_appropriate_flag");
  }
  WRITE_FLAG(pcVUI->colourDescriptionPresent,             "colour_description_present_flag");
  if (pcVUI->colourDescriptionPresent)
  {
    WRITE_CODE(pcVUI->colourPrimaries, 8,                 "colour_primaries");
    WRITE_CODE(pcVUI->transferCharacteristics, 8,         "transfer_characteristics");
    WRITE_CODE(pcVUI->matrixCoefficients, 8,              "matrix_coeffs");
    WRITE_FLAG(pcVUI->videoFullRangeFlag,                 "vui_video_full_range_flag");
  }
  WRITE_FLAG(pcVUI->chromaLocInfoPresent,                 "chroma_loc_info_present_flag");
  if (pcVUI->chromaLocInfoPresent)
  {
    if(pcVUI->progressiveSourceFlag && !pcVUI->interlacedSourceFlag)
    {
      WRITE_UVLC(pcVUI->chromaSampleLocType,              "chroma_sample_loc_type");
    }
    else
    {
      WRITE_UVLC(pcVUI->chromaSampleLocTypeTopField,      "chroma_sample_loc_type_top_field");
      WRITE_UVLC(pcVUI->chromaSampleLocTypeBottomField,   "chroma_sample_loc_type_bottom_field");
    }
  }

  if(!isByteAligned())
  {
    WRITE_FLAG(1,   "vui_payload_bit_equal_to_one");
    while(!isByteAligned())
    {
      WRITE_FLAG(0, "vui_payload_bit_equal_to_zero");
    }
  }
}

void HLSWriter::codeGeneralHrdparameters(const GeneralHrdParams * hrd)
{
  WRITE_CODE(hrd->numUnitsInTick, 32,                   "num_units_in_tick");
  WRITE_CODE(hrd->timeScale, 32,                        "time_scale");
  WRITE_FLAG(hrd->generalNalHrdParamsPresent,           "general_nal_hrd_parameters_present_flag");
  WRITE_FLAG(hrd->generalVclHrdParamsPresent,           "general_vcl_hrd_parameters_present_flag");
  if( hrd->generalNalHrdParamsPresent || hrd->generalVclHrdParamsPresent )
  {
    WRITE_FLAG(hrd->generalSamePicTimingInAllOlsFlag,     "general_same_pic_timing_in_all_ols_flag");
    WRITE_FLAG(hrd->generalDecodingUnitHrdParamsPresent,  "general_decoding_unit_hrd_params_present_flag");
    if (hrd->generalDecodingUnitHrdParamsPresent)
    {
      WRITE_CODE(hrd->tickDivisorMinus2, 8,               "tick_divisor_minus2");
    }
    WRITE_CODE(hrd->bitRateScale, 4,                      "bit_rate_scale");
    WRITE_CODE(hrd->cpbSizeScale, 4,                      "cpb_size_scale");
    if (hrd->generalDecodingUnitHrdParamsPresent)
    {
      WRITE_CODE(hrd->cpbSizeDuScale, 4,                  "cpb_size_du_scale");
    }
    WRITE_UVLC(hrd->hrdCpbCntMinus1,                      "hrd_cpb_cnt_minus1");
  }
}

void HLSWriter::codeOlsHrdParameters(const GeneralHrdParams * generalHrd, const OlsHrdParams *olsHrd, const uint32_t firstSubLayer, const uint32_t maxNumSubLayersMinus1)
{
  for( int i = firstSubLayer; i <= maxNumSubLayersMinus1; i ++ )
  {
    const OlsHrdParams *hrd = &(olsHrd[i]);
    WRITE_FLAG(hrd->fixedPicRateGeneralFlag,      "fixed_pic_rate_general_flag");

    if (!hrd->fixedPicRateGeneralFlag)
    {
      WRITE_FLAG(hrd->fixedPicRateWithinCvsFlag,  "fixed_pic_rate_within_cvs_flag");
    }
    if (hrd->fixedPicRateWithinCvsFlag)
    {
      WRITE_UVLC(hrd->elementDurationInTcMinus1,  "elemental_duration_in_tc_minus1");
    }
    else if ( (generalHrd->generalNalHrdParamsPresent || generalHrd->generalVclHrdParamsPresent) &&generalHrd->hrdCpbCntMinus1 == 0)
    {
      WRITE_FLAG(hrd->lowDelayHrdFlag,            "low_delay_hrd_flag");
    }

    for( int nalOrVcl = 0; nalOrVcl < 2; nalOrVcl ++ )
    {
      if (((nalOrVcl == 0) && (generalHrd->generalNalHrdParamsPresent)) || ((nalOrVcl == 1) && (generalHrd->generalVclHrdParamsPresent)))
      {
        for (int j = 0; j <= (generalHrd->hrdCpbCntMinus1); j++)
        {
          WRITE_UVLC(hrd->bitRateValueMinus1[j][nalOrVcl], "bit_rate_value_minus1");
          WRITE_UVLC(hrd->cpbSizeValueMinus1[j][nalOrVcl], "cpb_size_value_minus1");
          if (generalHrd->generalDecodingUnitHrdParamsPresent)
          {
            WRITE_UVLC(hrd->duCpbSizeValueMinus1[j][nalOrVcl], "cpb_size_du_value_minus1");
            WRITE_UVLC(hrd->duBitRateValueMinus1[j][nalOrVcl], "bit_rate_du_value_minus1");
          }
          WRITE_FLAG(hrd->cbrFlag[j][nalOrVcl], "cbr_flag");
        }
      }
    }
  }
}

void HLSWriter::dpb_parameters(int maxSubLayersMinus1, bool subLayerInfoFlag, const SPS *pcSPS)
{
  for (uint32_t i = (subLayerInfoFlag ? 0 : maxSubLayersMinus1); i <= maxSubLayersMinus1; i++)
  {
    WRITE_UVLC(pcSPS->maxDecPicBuffering[i] - 1,          "dpb_max_dec_pic_buffering_minus1[i]");
    WRITE_UVLC(pcSPS->numReorderPics[i],                  "dpb_max_num_reorder_pics[i]");
    WRITE_UVLC(pcSPS->maxLatencyIncreasePlus1[i],         "dpb_max_latency_increase_plus1[i]");
  }
}

void HLSWriter::codeSPS( const SPS* pcSPS )
{
  DTRACE( g_trace_ctx, D_HEADER, "=========== Sequence Parameter Set  ===========\n" );

  WRITE_CODE( pcSPS->spsId, 4,                            "sps_seq_parameter_set_id" );
  WRITE_CODE( pcSPS->vpsId, 4,                            "sps_video_parameter_set_id" );
  CHECK(pcSPS->maxTLayers == 0, "Maximum number of temporal sub-layers is '0'");

  WRITE_CODE(pcSPS->maxTLayers - 1, 3,                    "sps_max_sub_layers_minus1");
  WRITE_CODE( int(pcSPS->chromaFormatIdc), 2,             "sps_chroma_format_idc" );
  WRITE_CODE(floorLog2(pcSPS->CTUSize) - 5, 2,            "sps_log2_ctu_size_minus5");
  WRITE_FLAG(pcSPS->ptlDpbHrdParamsPresent,               "sps_ptl_dpb_hrd_params_present_flag");

  if (pcSPS->ptlDpbHrdParamsPresent)
  {
    codeProfileTierLevel( &pcSPS->profileTierLevel, true, pcSPS->maxTLayers - 1 );
  }

  WRITE_FLAG(pcSPS->GDR,                                  "sps_gdr_enabled_flag");
  WRITE_FLAG( pcSPS->rprEnabled,                          "sps_ref_pic_resampling_enabled_flag" );
  if( pcSPS->rprEnabled )
  {
    WRITE_FLAG(pcSPS->resChangeInClvsEnabled, "sps_res_change_in_clvs_allowed_flag");
  }
  WRITE_UVLC( pcSPS->maxPicWidthInLumaSamples,            "sps_pic_width_max_in_luma_samples" );
  WRITE_UVLC( pcSPS->maxPicHeightInLumaSamples,           "sps_pic_height_max_in_luma_samples" );

  const Window& conf = pcSPS->conformanceWindow;
  WRITE_FLAG( conf.enabledFlag,                           "sps_conformance_window_flag" );
  if (conf.enabledFlag)
  {
    WRITE_UVLC( conf.winLeftOffset   / SPS::getWinUnitX(pcSPS->chromaFormatIdc ), "sps_conf_win_left_offset" );
    WRITE_UVLC( conf.winRightOffset  / SPS::getWinUnitX(pcSPS->chromaFormatIdc ), "sps_conf_win_right_offset" );
    WRITE_UVLC( conf.winTopOffset    / SPS::getWinUnitY(pcSPS->chromaFormatIdc ), "sps_conf_win_top_offset" );
    WRITE_UVLC( conf.winBottomOffset / SPS::getWinUnitY(pcSPS->chromaFormatIdc ), "sps_conf_win_bottom_offset" );
  }

  WRITE_FLAG(pcSPS->subPicInfoPresent,                    "sps_subpic_info_present_flag");

  if (pcSPS->subPicInfoPresent)
  {
    THROW("no suppport");
  }

  WRITE_UVLC( pcSPS->bitDepths[ CH_L ] - 8,               "sps_bitdepth_minus8" );
  WRITE_FLAG( pcSPS->entropyCodingSyncEnabled,            "sps_entropy_coding_sync_enabled_flag" );
  WRITE_FLAG( pcSPS->entryPointsPresent,                  "sps_entry_point_offsets_present_flag" );
  WRITE_CODE( pcSPS->bitsForPOC-4, 4,                     "sps_log2_max_pic_order_cnt_lsb_minus4" );
  WRITE_FLAG( pcSPS->pocMsbFlag,                          "sps_poc_msb_flag");

  if (pcSPS->pocMsbFlag)
  {
    WRITE_UVLC(pcSPS->pocMsbLen - 1,                      "sps_poc_msb_len_minus1");
  }

  WRITE_CODE(0, 2,                                        "sps_num_extra_ph_bits_bytes");
  WRITE_CODE(0, 2,                                        "sps_num_extra_sh_bits_bytes");

  if (pcSPS->ptlDpbHrdParamsPresent)
  {
    if (pcSPS->maxTLayers > 1)
    {
      WRITE_FLAG(pcSPS->subLayerDpbParams,                "sps_sublayer_dpb_params_flag");
    }
    dpb_parameters(pcSPS->maxTLayers - 1, pcSPS->subLayerDpbParams, pcSPS);
  }

  WRITE_UVLC(pcSPS->log2MinCodingBlockSize - 2,                           "log2_min_luma_coding_block_size_minus2");
  WRITE_FLAG(pcSPS->partitionOverrideEnabled,                             "sps_partition_constraints_override_enabled_flag");
  WRITE_UVLC(Log2(pcSPS->minQTSize[0]) - pcSPS->log2MinCodingBlockSize,   "sps_log2_diff_min_qt_min_cb_intra_slice_luma");
  WRITE_UVLC(pcSPS->maxMTTDepth[0],                                       "sps_max_mtt_hierarchy_depth_intra_slice_luma");
  if (pcSPS->maxMTTDepth[0] != 0)
  {
    WRITE_UVLC(Log2(pcSPS->maxBTSize[0]) - Log2(pcSPS->minQTSize[0]),     "sps_log2_diff_max_bt_min_qt_intra_slice_luma");
    WRITE_UVLC(Log2(pcSPS->maxTTSize[0]) - Log2(pcSPS->minQTSize[0]),     "sps_log2_diff_max_tt_min_qt_intra_slice_luma");
  }
  if( pcSPS->chromaFormatIdc != CHROMA_400 )
  {
    WRITE_FLAG(pcSPS->dualITree,                                          "sps_qtbtt_dual_tree_intra_flag");
  }
  if (pcSPS->dualITree)
  {
    WRITE_UVLC(Log2(pcSPS->minQTSize[2]) - pcSPS->log2MinCodingBlockSize, "sps_log2_diff_min_qt_min_cb_intra_slice_chroma");
    WRITE_UVLC(pcSPS->maxMTTDepth[2],                                     "sps_max_mtt_hierarchy_depth_intra_slice_chroma");
    if (pcSPS->maxMTTDepth[2] != 0)
    {
      WRITE_UVLC(Log2(pcSPS->maxBTSize[2]) - Log2(pcSPS->minQTSize[2]),   "sps_log2_diff_max_bt_min_qt_intra_slice_chroma");
      WRITE_UVLC(Log2(pcSPS->maxTTSize[2]) - Log2(pcSPS->minQTSize[2]),   "sps_log2_diff_max_tt_min_qt_intra_slice_chroma");
    }
  }

  WRITE_UVLC(Log2(pcSPS->minQTSize[1]) - pcSPS->log2MinCodingBlockSize,   "sps_log2_diff_min_qt_min_cb_inter_slice");
  WRITE_UVLC(pcSPS->maxMTTDepth[1],                                       "sps_max_mtt_hierarchy_depth_inter_slice");
  if (pcSPS->maxMTTDepth[1] != 0)
  {
    WRITE_UVLC(Log2(pcSPS->maxBTSize[1]) - Log2(pcSPS->minQTSize[1]),     "sps_log2_diff_max_bt_min_qt_inter_slice");
    WRITE_UVLC(Log2(pcSPS->maxTTSize[1]) - Log2(pcSPS->minQTSize[1]),     "sps_log2_diff_max_tt_min_qt_inter_slice");
  }

  if (pcSPS->CTUSize > 32)
  {
    WRITE_FLAG( (pcSPS->log2MaxTbSize - 5) != 0,                          "sps_max_luma_transform_size_64_flag" );
  }
  WRITE_FLAG(pcSPS->transformSkip,                                        "sps_transform_skip_enabled_flag");
  if (pcSPS->transformSkip)
  {
    WRITE_UVLC(pcSPS->log2MaxTransformSkipBlockSize - 2,                  "sps_log2_transform_skip_max_size_minus2");
    WRITE_FLAG(pcSPS->BDPCM,                                              "sps_bdpcm_enabled_flag");
  }
  WRITE_FLAG( pcSPS->MTS,                                                 "sps_mts_enabled_flag" );
  if ( pcSPS->MTS )
  {
    WRITE_FLAG( pcSPS->MTSIntra,                                          "sps_explicit_mts_intra_enabled_flag" );
    WRITE_FLAG( pcSPS->MTSInter,                                          "sps_explicit_mts_inter_enabled_flag" );
  }
  WRITE_FLAG( pcSPS->LFNST,                                               "sps_lfnst_enabled_flag");

  if (pcSPS->chromaFormatIdc != CHROMA_400)
  {
    WRITE_FLAG(pcSPS->jointCbCr,                                          "sps_joint_cbcr_enabled_flag");

    const ChromaQpMappingTable& chromaQpMappingTable = pcSPS->chromaQpMappingTable;
    WRITE_FLAG(chromaQpMappingTable.m_sameCQPTableForAllChromaFlag,       "same_qp_table_for_chroma");
    int numQpTables = chromaQpMappingTable.m_sameCQPTableForAllChromaFlag ? 1 : (pcSPS->jointCbCr ? 3 : 2);
    CHECK(numQpTables != chromaQpMappingTable.m_numQpTables, " numQpTables does not match at encoder side ");
    for (int i = 0; i < numQpTables; i++)
    {
      WRITE_SVLC(chromaQpMappingTable.m_qpTableStartMinus26[i],           "sps_qp_table_starts_minus26");
      WRITE_UVLC(chromaQpMappingTable.m_numPtsInCQPTableMinus1[i],        "sps_num_points_in_qp_table_minus1");

      for (int j = 0; j <= chromaQpMappingTable.m_numPtsInCQPTableMinus1[i]; j++)
      {
        WRITE_UVLC(chromaQpMappingTable.m_deltaQpInValMinus1[i][j],       "sps_delta_qp_in_val_minus1");
        WRITE_UVLC(chromaQpMappingTable.m_deltaQpOutVal[i][j] ^ chromaQpMappingTable.m_deltaQpInValMinus1[i][j], "sps_delta_qp_diff_val");
      }
    }
  }

  WRITE_FLAG( pcSPS->saoEnabled,                          "sps_sao_enabled_flag");
  WRITE_FLAG( pcSPS->alfEnabled,                          "sps_alf_enabled_flag" );
  if (pcSPS->alfEnabled && pcSPS->chromaFormatIdc != CHROMA_400)
  {
    WRITE_FLAG( pcSPS->ccalfEnabled,                      "sps_ccalf_enabled_flag" );
  }
  WRITE_FLAG(pcSPS->lumaReshapeEnable,                    "sps_lmcs_enable_flag");
  WRITE_FLAG( pcSPS->weightPred,                          "sps_weighted_pred_flag" );   // Use of Weighting Prediction (P_SLICE)
  WRITE_FLAG( pcSPS->weightedBiPred,                      "sps_weighted_bipred_flag" );  // Use of Weighting Bi-Prediction (B_SLICE)
  WRITE_FLAG( pcSPS->longTermRefsPresent,                 "sps_long_term_ref_pics_flag" );
  if( pcSPS->vpsId > 0 )
  {
    WRITE_FLAG( pcSPS->interLayerPresent,                 "sps_inter_layer_ref_pics_present_flag" );
  }
  WRITE_FLAG( pcSPS->idrRefParamList,                     "sps_idr_rpl_present_flag" );
  WRITE_FLAG( pcSPS->rpl1CopyFromRpl0,                    "sps_rpl1_copy_from_rpl0_flag");

  //Write candidate for List0
  uint32_t numberOfRPL = (uint32_t)pcSPS->getNumRPL(0);
  WRITE_UVLC(numberOfRPL,                                 "sps_num_ref_pic_lists_in_sps[0]");
  for (int ii = 0; ii < numberOfRPL; ii++)
  {
    xCodeRefPicList( &pcSPS->rplList[0][ii], pcSPS->longTermRefsPresent, pcSPS->bitsForPOC, !pcSPS->weightPred && !pcSPS->weightedBiPred, ii );
  }

  //Write candidate for List1
  if (!pcSPS->rpl1CopyFromRpl0)
  {
    numberOfRPL = (uint32_t)pcSPS->getNumRPL(1);
    WRITE_UVLC(numberOfRPL,                               "sps_num_ref_pic_lists_in_sps[1]");
    for (int ii = 0; ii < numberOfRPL; ii++)
    {
      xCodeRefPicList( &pcSPS->rplList[1][ii], pcSPS->longTermRefsPresent, pcSPS->bitsForPOC, !pcSPS->weightPred && !pcSPS->weightedBiPred, ii );
    }
  }

  WRITE_FLAG( pcSPS->wrapAroundEnabled,                   "sps_ref_wraparound_enabled_flag" );

  WRITE_FLAG( pcSPS->temporalMVPEnabled,                  "sps_temporal_mvp_enabled_flag" );

  if ( pcSPS->temporalMVPEnabled )
  {
    WRITE_FLAG( pcSPS->SbtMvp,                            "sps_sbtmvp_enabled_flag");
  }

  WRITE_FLAG( pcSPS->AMVR,                                "sps_amvr_enabled_flag" );

  WRITE_FLAG( pcSPS->BDOF,                                "sps_bdof_enabled_flag" );
  if (pcSPS->BDOF)
  {
    WRITE_FLAG(pcSPS->BdofPresent,                        "sps_bdof_pic_present_flag");
  }
  WRITE_FLAG( pcSPS->SMVD,                                "sps_smvd_enabled_flag" );
  WRITE_FLAG( pcSPS->DMVR,                                "sps_dmvr_enabled_flag" );
  if (pcSPS->DMVR)
  {
    WRITE_FLAG(pcSPS->DmvrPresent,                        "sps_dmvr_pic_present_flag");
  }
  WRITE_FLAG(pcSPS->MMVD,                                 "sps_mmvd_enabled_flag");
  if ( pcSPS->MMVD )
  {
    WRITE_FLAG( pcSPS->fpelMmvd,                          "sps_fpel_mmvd_enabled_flag" );
  }
  WRITE_UVLC(MRG_MAX_NUM_CANDS - pcSPS->maxNumMergeCand,  "sps_six_minus_max_num_merge_cand");
  WRITE_FLAG( pcSPS->SBT,                                 "sps_sbt_enabled_flag" );
  WRITE_FLAG( pcSPS->Affine,                              "sps_affine_enabled_flag" );
  if ( pcSPS->Affine )
  {
    WRITE_UVLC(AFFINE_MRG_MAX_NUM_CANDS - pcSPS->maxNumAffineMergeCand, "five_minus_max_num_subblock_merge_cand");
    WRITE_FLAG( pcSPS->AffineType,                        "sps_affine_type_flag" );
    if (pcSPS->AMVR )
    {
      WRITE_FLAG( pcSPS->AffineAmvr,                      "sps_affine_amvr_enabled_flag" );
    }

    WRITE_FLAG( pcSPS->PROF,                              "sps_affine_prof_enabled_flag" );
    if (pcSPS->PROF)
    {
      WRITE_FLAG(pcSPS->ProfPresent,                      "sps_prof_pic_present_flag" );
    }
  }

  WRITE_FLAG(pcSPS->BCW,                                  "sps_bcw_enabled_flag");

  WRITE_FLAG( pcSPS->CIIP,                                "sps_ciip_enabled_flag" );

  if (pcSPS->maxNumMergeCand >= 2)
  {
    WRITE_FLAG(pcSPS->GEO,                                "sps_gpm_enabled_flag");
    if (pcSPS->GEO && pcSPS->maxNumMergeCand >= 3)
    {
      WRITE_UVLC(pcSPS->maxNumMergeCand - pcSPS->maxNumGeoCand,   "sps_max_num_merge_cand_minus_max_num_gpm_cand");
    }
  }

  WRITE_UVLC(pcSPS->log2ParallelMergeLevelMinus2,         "sps_log2_parallel_merge_level_minus2");
  WRITE_FLAG( pcSPS->ISP,                                 "sps_isp_enabled_flag");
  WRITE_FLAG( pcSPS->MRL,                                 "sps_mrl_enabled_flag");
  WRITE_FLAG( pcSPS->MIP,                                 "sps_mip_enabled_flag");
  if( pcSPS->chromaFormatIdc != CHROMA_400)
  {
    WRITE_FLAG( pcSPS->LMChroma,                          "sps_cclm_enabled_flag" );
  }
  if ( pcSPS->chromaFormatIdc == CHROMA_420 )
  {
    WRITE_FLAG( pcSPS->horCollocatedChroma,               "sps_chroma_horizontal_collocated_flag" );
    WRITE_FLAG( pcSPS->verCollocatedChroma,               "sps_chroma_vertical_collocated_flag" );
  }

  WRITE_FLAG(pcSPS->PLT,                                  "sps_palette_enabled_flag" );

  if (pcSPS->chromaFormatIdc == CHROMA_444)
  {
    WRITE_FLAG(pcSPS->PLT,                                "sps_plt_enabled_flag" );
  }
  if (pcSPS->chromaFormatIdc == CHROMA_444 && pcSPS->log2MaxTbSize != 6)
  {
    WRITE_FLAG(pcSPS->useColorTrans,                      "sps_act_enabled_flag");
  }
  if (pcSPS->transformSkip || pcSPS->PLT)
  {
    WRITE_UVLC(pcSPS->internalMinusInputBitDepth[CH_L],   "sps_internal_bit_depth_minus_input_bit_depth");
  }

  WRITE_FLAG(pcSPS->IBC,                                  "sps_ibc_enabled_flag");
  if( pcSPS->IBC )
  {
    WRITE_UVLC(IBC_MRG_MAX_NUM_CANDS - pcSPS->maxNumIBCMergeCand, "six_minus_max_num_ibc_merge_cand");
  }

  WRITE_FLAG( pcSPS->LADF,                                "sps_ladf_enabled_flag" );
  if ( pcSPS->LADF )
  {
    THROW("no support");
  }

  WRITE_FLAG( pcSPS->scalingListEnabled,                  "sps_explicit_scaling_list_enabled_flag" );
  if (pcSPS->LFNST && pcSPS->scalingListEnabled )
  {
    WRITE_FLAG(pcSPS->disableScalingMatrixForLfnstBlks,   "sps_scaling_matrix_for_lfnst_disabled_flag");
  }
  if (pcSPS->useColorTrans && pcSPS->scalingListEnabled)
  {
    WRITE_FLAG(pcSPS->scalingMatrixAlternativeColourSpaceDisabled, "sps_scaling_matrix_for_alternative_colour_space_disabled_flag");
  }
  if (pcSPS->scalingMatrixAlternativeColourSpaceDisabled)
  {
    WRITE_FLAG(pcSPS->scalingMatrixDesignatedColourSpace, "sps_scaling_matrix_designated_colour_space_flag");
  }
  WRITE_FLAG(pcSPS->depQuantEnabled,                      "sps_dep_quant_enabled_flag");
  WRITE_FLAG(pcSPS->signDataHidingEnabled,                "sps_sign_data_hiding_enabled_flag");

  WRITE_FLAG( pcSPS->virtualBoundariesEnabled,            "sps_virtual_boundaries_enabled_flag" );
  if( pcSPS->virtualBoundariesEnabled )
  {
    WRITE_CODE( pcSPS->numVerVirtualBoundaries, 2,        "sps_num_ver_virtual_boundaries");
    for( unsigned i = 0; i < pcSPS->numVerVirtualBoundaries; i++ )
    {
      WRITE_UVLC((pcSPS->virtualBoundariesPosX[i]>>3),    "sps_virtual_boundaries_pos_x");
    }
    WRITE_CODE(pcSPS->numHorVirtualBoundaries, 2,         "sps_num_hor_virtual_boundaries");
    for( unsigned i = 0; i < pcSPS->numHorVirtualBoundaries; i++ )
    {
      WRITE_UVLC((pcSPS->virtualBoundariesPosY[i]>>3),    "sps_virtual_boundaries_pos_y");
    }
  }

  if (pcSPS->ptlDpbHrdParamsPresent)
  {
    WRITE_FLAG(pcSPS->hrdParametersPresent,               "sps_timing_hrd_params_present_flag");

    if( pcSPS->hrdParametersPresent )
    {
      codeGeneralHrdparameters(&pcSPS->generalHrdParams);
      if ((pcSPS->maxTLayers - 1) > 0)
      {
        WRITE_FLAG(pcSPS->subLayerParametersPresent,      "sps_sublayer_cpb_params_present_flag");
      }
      uint32_t firstSubLayer = pcSPS->subLayerParametersPresent ? 0 : (pcSPS->maxTLayers - 1);
      codeOlsHrdParameters(&pcSPS->generalHrdParams, pcSPS->olsHrdParams, firstSubLayer, pcSPS->maxTLayers - 1);
    }
  }

  WRITE_FLAG(pcSPS->fieldSeqFlag,                         "sps_field_seq_flag");

  WRITE_FLAG( pcSPS->vuiParametersPresent,                "sps_vui_parameters_present_flag" );
  if (pcSPS->vuiParametersPresent)
  {
    OutputBitstream *bs = m_pcBitIf; // save the original ono
    OutputBitstream bs_count;
    setBitstream(&bs_count);
#if ENABLE_TRACING
    bool traceEnable = g_HLSTraceEnable;
    g_HLSTraceEnable = false;
#endif
    codeVUI(&pcSPS->vuiParameters, pcSPS);
#if ENABLE_TRACING
    g_HLSTraceEnable = traceEnable;
#endif
    unsigned vui_payload_data_num_bits = bs_count.getNumberOfWrittenBits();
    CHECK( vui_payload_data_num_bits % 8 != 0, "Invalid number of VUI payload data bits" );
    setBitstream(bs);
    WRITE_UVLC((vui_payload_data_num_bits >> 3) - 1,        "sps_vui_payload_size_minus1");
    while (!isByteAligned())
    {
      WRITE_FLAG(0,                                         "sps_vui_alignment_zero_bit");
    }
    codeVUI(&pcSPS->vuiParameters, pcSPS);
  }

  bool sps_extension_present_flag=false;
  bool sps_extension_flags[NUM_SPS_EXTENSION_FLAGS]={false};

  for(int i=0; i<NUM_SPS_EXTENSION_FLAGS; i++)
  {
    sps_extension_present_flag|=sps_extension_flags[i];
  }

  WRITE_FLAG( sps_extension_present_flag,                   "sps_extension_present_flag" );

  if (sps_extension_present_flag)
  {
#if ENABLE_TRACING
    static const char *syntaxStrings[]={ "sps_range_extension_flag",
      "sps_multilayer_extension_flag",
      "sps_extension_6bits[0]",
      "sps_extension_6bits[1]",
      "sps_extension_6bits[2]",
      "sps_extension_6bits[3]",
      "sps_extension_6bits[4]",
      "sps_extension_6bits[5]" };
#endif

    for(int i=0; i<NUM_SPS_EXTENSION_FLAGS; i++)
    {
      WRITE_FLAG( sps_extension_flags[i], syntaxStrings[i] );
    }

    for(int i=0; i<NUM_SPS_EXTENSION_FLAGS; i++) // loop used so that the order is determined by the enum.
    {
      if (sps_extension_flags[i])
      {
#if 0 // TODO: enable when applicable
        switch (SPSExtensionFlagIndex(i))
        {
        default:
          CHECK(sps_extension_flags[i]!=false, "Unknown PPS extension signalled"); // Should never get here with an active SPS extension flag.
          break;
        }
#endif
      }
    }
  }
  xWriteRbspTrailingBits();
}

void HLSWriter::codeDCI( const DCI* dci )
{
  DTRACE( g_trace_ctx, D_HEADER, "=========== Decoding Parameter Set     ===========\n" );

  WRITE_CODE( 0,                                    4,        "dci_reserved_zero_5bits" );
  uint32_t numPTLs = (uint32_t) dci->profileTierLevel.size();
  CHECK (numPTLs<1, "At least one PTL must be available in DPS");

  WRITE_CODE( numPTLs - 1,                          4,        "dci_num_ptls_minus1" );

  for (int i=0; i< numPTLs; i++)
  {
    codeProfileTierLevel( &dci->profileTierLevel[i], true, 0 );
  }
  WRITE_FLAG( 0,                                              "dci_extension_flag" );
  xWriteRbspTrailingBits();
}

void HLSWriter::codeVPS(const VPS* pcVPS)
{
  DTRACE( g_trace_ctx, D_HEADER, "=========== Video Parameter Set     ===========\n" );

  WRITE_CODE(pcVPS->vpsId,              4,              "vps_video_parameter_set_id");
  WRITE_CODE(pcVPS->maxLayers - 1,      6,              "vps_max_layers_minus1");
  WRITE_CODE(pcVPS->maxSubLayers - 1,   3,              "vps_max_sublayers_minus1");
  if (pcVPS->maxLayers > 1 && pcVPS->maxSubLayers > 1)
  {
    WRITE_FLAG(pcVPS->defaultPtlDpbHrdMaxTidFlag,        "vps_default_ptl_dpb_hrd_max_tid_flag");
  }
  if (pcVPS->maxLayers > 1)
  {
    WRITE_FLAG(pcVPS->allIndependentLayers,             "vps_all_independent_layers_flag");
  }
  for (uint32_t i = 0; i < pcVPS->maxLayers; i++)
  {
    WRITE_CODE(pcVPS->layerId[i], 6,                    "vps_layer_id");
    if (i > 0 && !pcVPS->allIndependentLayers)
    {
      WRITE_FLAG(pcVPS->independentLayer[i],            "vps_independent_layer_flag");
      if (!pcVPS->independentLayer[i])
      {
        bool presentFlag = false;
        for (int j = 0; j < i; j++)
        {
          presentFlag |= ((pcVPS->maxTidIlRefPicsPlus1[i][j] != VVENC_MAX_TLAYER) && pcVPS->directRefLayer[i][j]);
        }
        WRITE_FLAG(presentFlag, "max_tid_ref_present_flag[ i ]");
        for (int j = 0; j < i; j++)
        {
          WRITE_FLAG(pcVPS->directRefLayer[i][j], "vps_direct_ref_layer_flag");
          if (presentFlag && pcVPS->directRefLayer[i][j])
          {
            WRITE_CODE(pcVPS->maxTidIlRefPicsPlus1[i][j], 3, "max_tid_il_ref_pics_plus1[ i ][ j ]");
          }
        }
      }
    }
  }
  if( pcVPS->maxLayers > 1 )
  {
    if (pcVPS->allIndependentLayers)
    {
      WRITE_FLAG(pcVPS->eachLayerIsAnOls,               "vps_each_layer_is_an_ols_flag");
    }
    if (!pcVPS->eachLayerIsAnOls)
    {
      if (!pcVPS->allIndependentLayers)
      {
        WRITE_CODE(pcVPS->olsModeIdc, 2,                "vps_ols_mode_idc");
      }
      if (pcVPS->olsModeIdc == 2)
      {
        WRITE_CODE(pcVPS->numOutputLayerSets - 2, 8,    "vps_num_output_layer_sets_minus2");
        for (uint32_t i = 1; i < pcVPS->numOutputLayerSets; i++)
        {
          for (uint32_t j = 0; j < pcVPS->maxLayers; j++)
          {
            WRITE_FLAG(pcVPS->olsOutputLayer[i][j],     "vps_ols_output_layer_flag");
          }
        }
      }
    }
    CHECK(pcVPS->numPtls - 1 >= pcVPS->totalNumOLSs, "vps_num_ptls_minus1 shall be less than TotalNumOlss");
    WRITE_CODE(pcVPS->numPtls - 1, 8,                   "vps_num_ptls_minus1");
  }

  int totalNumOlss = pcVPS->totalNumOLSs;
  for (int i = 0; i < pcVPS->numPtls; i++)
  {
    if(i > 0)
    {
      WRITE_FLAG(pcVPS->ptPresent[i],                   "vps_ptl_present_flag");
    }
    if(!pcVPS->allLayersSameNumSubLayers)
    {
      WRITE_CODE(pcVPS->ptlMaxTemporalId[i] ,3,         "vps_ptl_max_temporal_id");
    }
  }
  int cnt = 0;
  while (m_pcBitIf->getNumBitsUntilByteAligned())
  {
    WRITE_FLAG( 0,                                      "vps_ptl_reserved_zero_bit");
    cnt++;
  }
  CHECK(cnt>=8, "More than '8' alignment bytes written");
  for (int i = 0; i < pcVPS->numPtls; i++)
  {
    codeProfileTierLevel(&pcVPS->profileTierLevel[i], pcVPS->ptPresent[i], pcVPS->ptlMaxTemporalId[i] - 1);
  }
  for (int i = 0; i < totalNumOlss; i++)
  {
    if(pcVPS->numPtls > 1 && pcVPS->numPtls != pcVPS->totalNumOLSs)
      WRITE_CODE(pcVPS->olsPtlIdx[i], 8,                "vps_ols_ptl_idx");
  }
  if( !pcVPS->allIndependentLayers )
  {
    WRITE_UVLC( pcVPS->numDpbParams,                    "vps_num_dpb_params" );
  }

  if( pcVPS->numDpbParams > 0 && pcVPS->maxSubLayers > 1 )
  {
    WRITE_FLAG( pcVPS->sublayerDpbParamsPresent,        "vps_sublayer_dpb_params_present_flag" );
  }

  for( int i = 0; i < pcVPS->numDpbParams; i++ )
  {
    if( !pcVPS->allLayersSameNumSubLayers )
    {
      WRITE_CODE( pcVPS->dpbMaxTemporalId[i], 3,      "vps_dpb_max_temporal_id[i]" );
    }
    if( pcVPS->maxSubLayers == 1 )
    {
      CHECK( pcVPS->dpbMaxTemporalId[i] != 0, "When vps_max_sublayers_minus1 is equal to 0, the value of dpb_max_temporal_id[ i ] is inferred to be equal to 0" );
    }
    else
    {
      if( pcVPS->defaultPtlDpbHrdMaxTidFlag )
      {
        CHECK( pcVPS->dpbMaxTemporalId[i] != pcVPS->maxSubLayers - 1, "When vps_max_sublayers_minus1 is greater than 0 and vps_all_layers_same_num_sublayers_flag is equal to 1, the value of dpb_max_temporal_id[ i ] is inferred to be equal to vps_max_sublayers_minus1" );
      }
      else
      {
        WRITE_CODE( pcVPS->dpbMaxTemporalId[i], 3,      "vps_dpb_max_temporal_id[i]" );
      }
    }

    for( int j = ( pcVPS->sublayerDpbParamsPresent ? 0 : pcVPS->dpbMaxTemporalId[i] ); j <= pcVPS->dpbMaxTemporalId[i]; j++ )
    {
      WRITE_UVLC( pcVPS->dpbParameters[i].maxDecPicBuffering[j],      "max_dec_pic_buffering_minus1[i]" );
      WRITE_UVLC( pcVPS->dpbParameters[i].numReorderPics[j],          "max_num_reorder_pics[i]" );
      WRITE_UVLC( pcVPS->dpbParameters[i].maxLatencyIncreasePlus1[j], "max_latency_increase_plus1[i]" );
    }
  }

  for( int i = 0; i < pcVPS->totalNumOLSs; i++ )
  {
    if( pcVPS->numLayersInOls[i] > 1 )
    {
      WRITE_UVLC( pcVPS->olsDpbPicSize[i].width,          "vps_ols_dpb_pic_width[i]" );
      WRITE_UVLC( pcVPS->olsDpbPicSize[i].height,         "vps_ols_dpb_pic_height[i]" );
      WRITE_CODE( pcVPS->olsDpbChromaFormatIdc[i], 2,     "vps_ols_dpb_chroma_format[i]");
      WRITE_UVLC( pcVPS->olsDpbBitDepthMinus8[i],         "vps_ols_dpb_bitdepth_minus8[i]");
      if( pcVPS->numDpbParams > 1 && (pcVPS->numDpbParams != pcVPS->numMultiLayeredOlss) )
      {
        WRITE_UVLC( pcVPS->olsDpbParamsIdx[i],            "vps_ols_dpb_params_idx[i]" );
      }
    }
  }


  if (!pcVPS->eachLayerIsAnOls)
  {
    WRITE_FLAG(pcVPS->generalHrdParamsPresent, "vps_general_hrd_params_present_flag");
  }
  if (pcVPS->generalHrdParamsPresent)
  {
    codeGeneralHrdparameters(&pcVPS->generalHrdParams);
    if ((pcVPS->maxSubLayers-1) > 0)
    {
      WRITE_FLAG(pcVPS->sublayerCpbParamsPresent, "vps_sublayer_cpb_params_present_flag");
    }
    WRITE_UVLC(pcVPS->numOlsHrdParamsMinus1, "vps_num_ols_hrd_params_minus1");
    for (int i = 0; i <= pcVPS->numOlsHrdParamsMinus1; i++)
    {
      if (!pcVPS->defaultPtlDpbHrdMaxTidFlag)
      {
        WRITE_CODE(pcVPS->hrdMaxTid[i], 3, "vps_hrd_vps_max_tid[i]");
      }
      uint32_t firstSublayer = pcVPS->sublayerCpbParamsPresent ? 0 : pcVPS->hrdMaxTid[i];
      codeOlsHrdParameters(&pcVPS->generalHrdParams, &pcVPS->olsHrdParams[i], firstSublayer, pcVPS->hrdMaxTid[i]);
    }
    if ((pcVPS->numOlsHrdParamsMinus1 > 0) && ((pcVPS->numOlsHrdParamsMinus1 + 1) != pcVPS->numMultiLayeredOlss))
    {
      for (int i = 0; i < pcVPS->numMultiLayeredOlss; i++)
      {
        WRITE_UVLC(pcVPS->olsHrdIdx[i], "vps_ols_hrd_idx[i]");
      }
    }
  }
  WRITE_FLAG(0,                                           "vps_extension_flag");

  //future extensions here..
  xWriteRbspTrailingBits();
}

void HLSWriter::codePictureHeader( const PicHeader* picHeader, bool writeRbspTrailingBits )
{
  const PPS*  pps = NULL;
  const SPS*  sps = NULL;

  DTRACE( g_trace_ctx, D_HEADER, "=========== Picture Header ===========\n" );

  CodingStructure& cs = *picHeader->pic->cs;
  WRITE_FLAG(picHeader->gdrOrIrapPic, "ph_gdr_or_irap_pic_flag");
  WRITE_FLAG(picHeader->nonRefPic,    "ph_non_ref_pic_flag");
  if (picHeader->gdrOrIrapPic)
  {
    WRITE_FLAG(picHeader->gdrPic,     "ph_gdr_pic_flag");
  }
  // Q0781, two-flags
  WRITE_FLAG(picHeader->picInterSliceAllowed,   "ph_inter_slice_allowed_flag");
  if (picHeader->picInterSliceAllowed)
  {
    WRITE_FLAG(picHeader->picIntraSliceAllowed, "ph_intra_slice_allowed_flag");
  }
  // parameter sets
  WRITE_UVLC(picHeader->ppsId,                  "ph_pic_parameter_set_id");
  pps = cs.slice->pps;
  CHECK(pps == 0, "Invalid PPS");
  sps = cs.slice->sps;
  CHECK(sps == 0, "Invalid SPS");
  int pocBits = cs.slice->sps->bitsForPOC;
  int pocMask = (1 << pocBits) - 1;
  WRITE_CODE(cs.slice->poc & pocMask, pocBits,  "ph_pic_order_cnt_lsb");
  if( picHeader->gdrPic )
  {
    WRITE_UVLC(picHeader->recoveryPocCnt,       "ph_recovery_poc_cnt");
  }

  // PH extra bits are not written in the reference encoder
  // as these bits are reserved for future extensions
  // for( i = 0; i < NumExtraPhBits; i++ )
  //    ph_extra_bit[ i ]

  if (sps->pocMsbFlag)
  {
    WRITE_FLAG(picHeader->pocMsbPresent,        "ph_poc_msb_present_flag");
    if (picHeader->pocMsbPresent)
    {
      WRITE_CODE(picHeader->pocMsbVal, sps->pocMsbLen, "ph_poc_msb_val");
    }
  }

   // alf enable flags and aps IDs
  if( sps->alfEnabled)
  {
    if (pps->alfInfoInPh)
    {
      WRITE_FLAG(picHeader->alfEnabled[COMP_Y],         "ph_alf_enabled_flag");
      if (picHeader->alfEnabled[COMP_Y])
      {
        WRITE_CODE(picHeader->numAlfAps, 3,             "ph_num_alf_aps_ids_luma");
        for (int i = 0; i < picHeader->numAlfAps; i++)
        {
          WRITE_CODE(picHeader->alfApsId[i], 3,         "ph_alf_aps_id_luma");
        }

        const int alfChromaIdc = picHeader->alfEnabled[COMP_Cb] + picHeader->alfEnabled[COMP_Cr] * 2 ;
        if (sps->chromaFormatIdc != CHROMA_400)
        {
          WRITE_CODE(picHeader->alfEnabled[COMP_Cb], 1, "ph_alf_cb_enabled_flag");
          WRITE_CODE(picHeader->alfEnabled[COMP_Cr], 1, "ph_alf_cr_enabled_flag");
        }
        if (alfChromaIdc)
        {
          WRITE_CODE(picHeader->alfChromaApsId, 3,      "ph_alf_aps_id_chroma");
        }
        if (sps->ccalfEnabled)
        {
          WRITE_FLAG(picHeader->ccalfEnabled[COMP_Cb],  "ph_cc_alf_cb_enabled_flag");
          if (picHeader->ccalfEnabled[COMP_Cb])
          {
            WRITE_CODE(picHeader->ccalfCbApsId, 3,      "ph_cc_alf_cb_aps_id");
          }
          WRITE_FLAG(picHeader->ccalfEnabled[COMP_Cr],  "ph_cc_alf_cr_enabled_flag");
          if (picHeader->ccalfEnabled[COMP_Cr])
          {
            WRITE_CODE(picHeader->ccalfCrApsId, 3,      "ph_cc_alf_cr_aps_id");
          }
        }
      }
    }
  }

  // luma mapping / chroma scaling controls
  if (sps->lumaReshapeEnable)
  {
    WRITE_FLAG(picHeader->lmcsEnabled,                  "ph_lmcs_enabled_flag");
    if (picHeader->lmcsEnabled)
    {
      WRITE_CODE(picHeader->lmcsApsId, 2,               "ph_lmcs_aps_id");
      if (sps->chromaFormatIdc != CHROMA_400)
      {
        WRITE_FLAG(picHeader->lmcsChromaResidualScale,  "ph_chroma_residual_scale_flag");
      }
    }
  }

  // quantization scaling lists
  if( sps->scalingListEnabled )
  {
    WRITE_FLAG( picHeader->explicitScalingListEnabled,  "ph_scaling_list_present_flag" );
    if( picHeader->explicitScalingListEnabled )
    {
      WRITE_CODE( picHeader->scalingListApsId, 3,       "ph_scaling_list_aps_id" );
    }
  }

  // virtual boundaries
  if( sps->virtualBoundariesEnabled && !sps->virtualBoundariesPresent )
  {
    WRITE_FLAG( picHeader->virtualBoundariesEnabled,    "ph_loop_filter_across_virtual_boundaries_disabled_present_flag" );
    if( picHeader->virtualBoundariesEnabled )
    {
      WRITE_CODE(picHeader->numVerVirtualBoundaries, 2, "ph_num_ver_virtual_boundaries");
      for( unsigned i = 0; i < picHeader->numVerVirtualBoundaries; i++ )
      {
        WRITE_UVLC(picHeader->virtualBoundariesPosX[i] >> 3, "ph_virtual_boundaries_pos_x");
      }
      WRITE_CODE(picHeader->numHorVirtualBoundaries, 2, "ph_num_hor_virtual_boundaries");
      for( unsigned i = 0; i < picHeader->numHorVirtualBoundaries; i++ )
      {
        WRITE_UVLC(picHeader->virtualBoundariesPosY[i]>>3, "ph_virtual_boundaries_pos_y");
      }
    }
  }

  // picture output flag
  if( pps->outputFlagPresent && !picHeader->nonRefPic)
  {
    WRITE_FLAG( picHeader->picOutputFlag, "ph_pic_output_flag" );
  }

  // reference picture lists
  if (pps->rplInfoInPh)
  {
    // List0 and List1
    for(int listIdx = 0; listIdx < 2; listIdx++)
    {
      if(sps->getNumRPL(listIdx) > 0 &&
          (listIdx == 0 || (listIdx == 1 && pps->rpl1IdxPresent)))
      {
        WRITE_FLAG(picHeader->rplIdx[listIdx] != -1 ? 1 : 0, "pic_rpl_sps_flag[i]");
      }
      else if(sps->getNumRPL(listIdx) == 0)
      {
        CHECK(picHeader->rplIdx[listIdx] != -1, "rpl_sps_flag[1] will be infer to 0 and this is not what was expected");
      }
      else if(listIdx == 1)
      {
        auto rplsSpsFlag0 = picHeader->rplIdx[0] != -1 ? 1 : 0;
        auto rplsSpsFlag1 = picHeader->rplIdx[1] != -1 ? 1 : 0;
        CHECK(rplsSpsFlag1 != rplsSpsFlag0, "rpl_sps_flag[1] will be infer to 0 and this is not what was expected");
      }

      if(picHeader->rplIdx[listIdx] != -1)
      {
        if(sps->getNumRPL(listIdx) > 1 &&
            (listIdx == 0 || (listIdx == 1 && pps->rpl1IdxPresent)))
        {
          int numBits = ceilLog2(sps->getNumRPL( listIdx ));
          WRITE_CODE(picHeader->rplIdx[listIdx], numBits, "pic_rpl_idx[i]");
        }
        else if(sps->getNumRPL(listIdx) == 1)
        {
          CHECK(picHeader->rplIdx[listIdx] != 0, "RPL1Idx is not signalled but it is not equal to 0");
        }
        else
        {
          CHECK(picHeader->rplIdx[1] != picHeader->rplIdx[0], "RPL1Idx is not signalled but it is not the same as RPL0Idx");
        }
      }
      // explicit RPL in picture header
      else
      {
        xCodeRefPicList( picHeader->pRPL[listIdx], sps->longTermRefsPresent, sps->bitsForPOC, !(sps->weightPred||sps->weightedBiPred), -1 );
      }

      // POC MSB cycle signalling for LTRP
      if (picHeader->pRPL[listIdx]->numberOfLongtermPictures)
      {
        for (int i = 0; i < picHeader->pRPL[listIdx]->numberOfLongtermPictures + picHeader->pRPL[listIdx]->numberOfShorttermPictures; i++)
        {
          if (picHeader->pRPL[listIdx]->isLongtermRefPic[i])
          {
            if (picHeader->pRPL[listIdx]->ltrpInSliceHeader)
            {
              WRITE_CODE(picHeader->pRPL[listIdx]->refPicIdentifier[i], sps->bitsForPOC,
                         "pic_poc_lsb_lt[listIdx][rplsIdx][j]");
            }
            WRITE_FLAG(picHeader->pRPL[listIdx]->deltaPocMSBPresent[i], "pic_delta_poc_msb_present_flag[i][j]");
            if (picHeader->pRPL[listIdx]->deltaPocMSBPresent[i])
            {
              WRITE_UVLC(picHeader->pRPL[listIdx]->deltaPocMSBCycleLT[i], "pic_delta_poc_msb_cycle_lt[i][j]");
            }
          }
        }
      }
    }
  }

  // partitioning constraint overrides
  if (sps->partitionOverrideEnabled )
  {
    WRITE_FLAG(picHeader->splitConsOverride, "partition_constraints_override_flag");
  }

  // Q0781, two-flags
  if (picHeader->picIntraSliceAllowed)
  {
    if (picHeader->splitConsOverride)
    {
      WRITE_UVLC(floorLog2(picHeader->minQTSize[0]) - sps->log2MinCodingBlockSize, "pic_log2_diff_min_qt_min_cb_intra_slice_luma");
      WRITE_UVLC(picHeader->maxMTTDepth[0], "ph_max_mtt_hierarchy_depth_intra_slice_luma");
      if (picHeader->maxMTTDepth[0] != 0)
      {
        WRITE_UVLC(floorLog2(picHeader->maxBTSize[0]) - floorLog2(picHeader->minQTSize[0]), "ph_log2_diff_max_bt_min_qt_intra_slice_luma");
        WRITE_UVLC(floorLog2(picHeader->maxTTSize[0]) - floorLog2(picHeader->minQTSize[0]), "ph_log2_diff_max_tt_min_qt_intra_slice_luma");
      }

      if (sps->dualITree)
      {
        WRITE_UVLC(floorLog2(picHeader->minQTSize[2]) - sps->log2MinCodingBlockSize, "ph_log2_diff_min_qt_min_cb_intra_slice_chroma");
        WRITE_UVLC(picHeader->maxMTTDepth[2], "ph_max_mtt_hierarchy_depth_intra_slice_chroma");
        if (picHeader->maxMTTDepth[2] != 0)
        {
          WRITE_UVLC(floorLog2(picHeader->maxBTSize[2]) - floorLog2(picHeader->minQTSize[2]), "ph_log2_diff_max_bt_min_qt_intra_slice_chroma");
          WRITE_UVLC(floorLog2(picHeader->maxTTSize[2]) - floorLog2(picHeader->minQTSize[2]), "ph_log2_diff_max_tt_min_qt_intra_slice_chroma");
        }
      }
    }
  }
  if (picHeader->picIntraSliceAllowed )
  {
  // delta quantization and chrom and chroma offset
    if (pps->useDQP)
    {
      WRITE_UVLC( picHeader->cuQpDeltaSubdivIntra, "ph_cu_qp_delta_subdiv_intra_slice" );
    }
    if (pps->chromaQpOffsetListLen )
    {
      WRITE_UVLC( picHeader->cuChromaQpOffsetSubdivIntra, "ph_cu_chroma_qp_offset_subdiv_intra_slice" );
    }
  }

  if (picHeader->picInterSliceAllowed )
  {
    if (picHeader->splitConsOverride )
    {
      WRITE_UVLC(floorLog2(picHeader->minQTSize[1]) - sps->log2MinCodingBlockSize, "ph_log2_diff_min_qt_min_cb_inter_slice");
      WRITE_UVLC(picHeader->maxMTTDepth[1], "ph_max_mtt_hierarchy_depth_inter_slice");
      if (picHeader->maxMTTDepth[1] != 0)
      {
        WRITE_UVLC(floorLog2(picHeader->maxBTSize[1]) - floorLog2(picHeader->minQTSize[1]), "ph_log2_diff_max_bt_min_qt_inter_slice");
        WRITE_UVLC(floorLog2(picHeader->maxTTSize[1]) - floorLog2(picHeader->minQTSize[1]), "ph_log2_diff_max_tt_min_qt_inter_slice");
      }
    }

    // delta quantization and chrom and chroma offset
    if (pps->useDQP)
    {
      WRITE_UVLC(picHeader->cuQpDeltaSubdivInter, "ph_cu_qp_delta_subdiv_inter_slice");
    }

    if (pps->chromaQpOffsetListLen )
    {
      WRITE_UVLC(picHeader->cuChromaQpOffsetSubdivInter, "ph_cu_chroma_qp_offset_subdiv_inter_slice");
    }

    // temporal motion vector prediction
    if (sps->temporalMVPEnabled)
    {
      WRITE_FLAG( picHeader->enableTMVP, "ph_temporal_mvp_enabled_flag" );
      if (picHeader->enableTMVP && pps->rplInfoInPh)
      {
        if (picHeader->pRPL[1]->getNumRefEntries() > 0)
        {
          WRITE_CODE(picHeader->picColFromL0, 1, "ph_collocated_from_l0_flag");
        }
        if ((picHeader->picColFromL0 && picHeader->pRPL[0]->getNumRefEntries() > 1) ||
          (!picHeader->picColFromL0 && picHeader->pRPL[1]->getNumRefEntries() > 1))
        {
          WRITE_UVLC(picHeader->colRefIdx, "ph_collocated_ref_idx");
        }
      }
    }

  // full-pel MMVD flag
    if (sps->fpelMmvd )
    {
      WRITE_FLAG( picHeader->disFracMMVD, "ph_fpel_mmvd_enabled_flag" );
    }
  // mvd L1 zero flag
    if (!pps->rplInfoInPh || picHeader->pRPL[1]->getNumRefEntries() > 0)
    {
      WRITE_FLAG(picHeader->mvdL1Zero, "ph_mvd_l1_zero_flag");
    }

  // picture level BDOF disable flags
    if (sps->BdofPresent && (!pps->rplInfoInPh || picHeader->pRPL[1]->getNumRefEntries() > 0))
    {
      WRITE_FLAG(picHeader->disBdofFlag, "ph_disable_bdof_flag");
    }

  // picture level DMVR disable flags
    if (sps->DmvrPresent && (!pps->rplInfoInPh || picHeader->pRPL[1]->getNumRefEntries() > 0))
    {
      WRITE_FLAG(picHeader->disDmvrFlag, "ph_disable_dmvr_flag");
    }

  // picture level PROF disable flags
    if (sps->ProfPresent)
    {
      WRITE_FLAG(picHeader->disProfFlag, "ph_disable_prof_flag");
    }

    if ((pps->weightPred || pps->weightedBiPred) && pps->wpInfoInPh )
    {
      xCodePredWeightTable(picHeader, pps, sps);
    }
   }

  if (pps->qpDeltaInfoInPh)
  {
    WRITE_SVLC(picHeader->qpDelta, "ph_qp_delta");
  }

  // joint Cb/Cr sign flag
  if (sps->jointCbCr )
  {
    WRITE_FLAG( picHeader->jointCbCrSign, "ph_joint_cbcr_sign_flag" );
  }

  // sao enable flags
  if(sps->saoEnabled)
  {
    if (pps->saoInfoInPh)
    {
      WRITE_FLAG(picHeader->saoEnabled[CH_L], "ph_sao_luma_enabled_flag");
      if (sps->chromaFormatIdc != CHROMA_400)
      {
        WRITE_FLAG(picHeader->saoEnabled[CH_C], "ph_sao_chroma_enabled_flag");
      }
    }
  }

  // deblocking filter controls
  if (pps->deblockingFilterControlPresent )
  {
    if(pps->deblockingFilterOverrideEnabled)
    {
      if (pps->dbfInfoInPh)
      {
        WRITE_FLAG ( picHeader->deblockingFilterOverride, "ph_deblocking_filter_override_flag" );
 
        if(picHeader->deblockingFilterOverride)
        {
          WRITE_FLAG( picHeader->deblockingFilterDisable, "ph_deblocking_filter_disabled_flag" );
          if( !picHeader->deblockingFilterDisable )
          {
            WRITE_SVLC( picHeader->deblockingFilterBetaOffsetDiv2[COMP_Y], "ph_beta_offset_div2" );
            WRITE_SVLC( picHeader->deblockingFilterTcOffsetDiv2[COMP_Y], "ph_tc_offset_div2" );
            if( pps->usePPSChromaTool )
            {
              WRITE_SVLC( picHeader->deblockingFilterBetaOffsetDiv2[COMP_Cb], "ph_cb_beta_offset_div2" );
              WRITE_SVLC( picHeader->deblockingFilterTcOffsetDiv2[COMP_Cb], "ph_cb_tc_offset_div2" );
              WRITE_SVLC( picHeader->deblockingFilterBetaOffsetDiv2[COMP_Cr], "ph_cr_beta_offset_div2" );
              WRITE_SVLC( picHeader->deblockingFilterTcOffsetDiv2[COMP_Cr], "ph_cr_tc_offset_div2" );
            }
          }
        }
      }
    }
  }

  // picture header extension
  if(pps->pictureHeaderExtensionPresent)
  {
    WRITE_UVLC(0,"ph_extension_length");
  }

  if ( writeRbspTrailingBits )
  {
    xWriteRbspTrailingBits();
  }
}


void HLSWriter::codeSliceHeader( const Slice* slice )
{
  DTRACE( g_trace_ctx, D_HEADER, "=========== Slice ===========\n" );

  CodingStructure& cs        = *slice->pic->cs;
  const PicHeader *picHeader = cs.picHeader;
  const ChromaFormat format  = slice->sps->chromaFormatIdc;
  const uint32_t numberValidComponents = getNumberValidComponents(format);
  const bool chromaEnabled = isChromaEnabled(format);

  WRITE_FLAG(slice->pictureHeaderInSliceHeader, "sh_picture_header_in_slice_header_flag");
  if(slice->pictureHeaderInSliceHeader)
  {
    codePictureHeader(picHeader, false);
  }

  if (slice->sps->subPicInfoPresent)
  {
    uint32_t bitsSubPicId;
    if (slice->sps->subPicIdMappingExplicitlySignalled)
    {
      bitsSubPicId = slice->sps->subPicIdLen;
    }
    else if (slice->pps->subPicIdMappingInPps)
    {
      bitsSubPicId = slice->pps->subPicIdLen;
    }
    else
    {
      bitsSubPicId = ceilLog2(slice->sps->numSubPics);
    }
    WRITE_CODE(slice->sliceSubPicId, bitsSubPicId, "sh_subpic_id");
  }

  if (!slice->pps->rectSlice)
  {
    THROW("no suppport");
  }
  else
  {
    // slice address is the index of the slice within the current sub-picture
    uint32_t currSubPicIdx = slice->pps->getSubPicIdxFromSubPicId( slice->sliceSubPicId );
    SubPic currSubPic = slice->pps->subPics[currSubPicIdx];
    if( currSubPic.numSlicesInSubPic > 1 )
    {
      int numSlicesInPreviousSubPics = 0;
      for(int sp = 0; sp < currSubPicIdx; sp++)
      {
        numSlicesInPreviousSubPics += slice->pps->subPics[sp].numSlicesInSubPic;
      }
      int bitsSliceAddress = ceilLog2(currSubPic.numSlicesInSubPic);
      WRITE_CODE( slice->sliceMap.sliceID - numSlicesInPreviousSubPics, bitsSliceAddress, "sh_slice_address");
    }
  }

  if (picHeader->picInterSliceAllowed)
  {
    WRITE_UVLC(slice->sliceType, "sh_slice_type");
  }
  if (picHeader->gdrOrIrapPic) //th check this
  {
    WRITE_FLAG(picHeader->noOutputOfPriorPics, "sh_no_output_of_prior_pics_flag");
  }

  if (!picHeader->picIntraSliceAllowed )
  {
    CHECK(slice->sliceType == VVENC_I_SLICE, "when pic_intra_slice_allowed_flag = 0, no I_Slice is allowed");
  }

  if (slice->sps->alfEnabled && !slice->pps->alfInfoInPh)
  {
    const int alfEnabled = slice->alfEnabled[COMP_Y];
    WRITE_FLAG(alfEnabled, "sh_alf_enabled_flag");

    if (alfEnabled)
    {
      WRITE_CODE(slice->numAps, 3, "sh_num_alf_aps_ids_luma");
      for (int i = 0; i < slice->numAps; i++)
      {
        WRITE_CODE(slice->lumaApsId[i], 3, "sh_alf_aps_id_luma");
      }

      const int alfChromaIdc = slice->alfEnabled[COMP_Cb] + slice->alfEnabled[COMP_Cr] * 2;
      if (chromaEnabled)
      {
        WRITE_FLAG(slice->alfEnabled[COMP_Cb], "sh_alf_cb_enabled_flag");
        WRITE_FLAG(slice->alfEnabled[COMP_Cr], "sh_alf_cr_enabled_flag");
      }
      if (alfChromaIdc)
      {
        WRITE_CODE(slice->chromaApsId, 3,      "sh_alf_aps_id_chroma");
      }

      if (slice->sps->ccalfEnabled)
      {
        WRITE_FLAG(slice->ccAlfCbEnabled,      "sh_cc_alf_cb_enabled_flag");
        if( slice->ccAlfCbEnabled )
        {
          // write CC ALF Cb APS ID
          WRITE_CODE(slice->ccAlfCbApsId, 3,   "sh_cc_alf_cb_aps_id");
        }
        // Cr
        WRITE_FLAG(slice->ccAlfCrEnabled,      "sh_cc_alf_cr_enabled_flag");
        if( slice->ccAlfCrEnabled )
        {
          // write CC ALF Cr APS ID
          WRITE_CODE(slice->ccAlfCrApsId, 3,   "sh_cc_alf_cr_aps_id");
        }
      }
    }
  }

  if (picHeader->lmcsEnabled && !slice->pictureHeaderInSliceHeader)
  {
    WRITE_FLAG( slice->lmcsEnabled,             "sh_lmcs_enabled_flag");
  }
  if (picHeader->explicitScalingListEnabled && !slice->pictureHeaderInSliceHeader)
  {
    WRITE_FLAG(slice->explicitScalingListUsed,  "sh_explicit_scaling_list_used_flag");
  }

  if(  !slice->pps->rplInfoInPh && (!slice->getIdrPicFlag() || slice->sps->idrRefParamList))
  {
    int numRPL0 = slice->sps->getNumRPL(0);
    //Write L0 related syntax elements
    if (numRPL0 > 0)
    {
      WRITE_FLAG(slice->rplIdx[0] != -1, "ref_pic_list_sps_flag[0]");
    }
    if (slice->rplIdx[0] != -1)
    {
      if (numRPL0 > 1)
      {
        int numBits = 0;
        while ((1 << numBits) < numRPL0)
        {
          numBits++;
        }
        WRITE_CODE(slice->rplIdx[0], numBits, "ref_pic_list_idx[0]");
      }
    }
    else
    {  //write local RPL0
      xCodeRefPicList( slice->rpl[0], slice->sps->longTermRefsPresent, slice->sps->bitsForPOC, !slice->sps->weightPred && !slice->sps->weightedBiPred, -1 );
    }
    //Deal POC Msb cycle signalling for LTRP
    if (slice->rpl[0]->numberOfLongtermPictures)
    {
      for (int i = 0; i < slice->rpl[0]->numberOfLongtermPictures + slice->rpl[0]->numberOfShorttermPictures; i++)
      {
        if (slice->rpl[0]->isLongtermRefPic[i])
        {
          if (slice->rpl[0]->ltrpInSliceHeader)
          {
            WRITE_CODE(slice->rpl[0]->refPicIdentifier[i], slice->sps->bitsForPOC, "slice_poc_lsb_lt[listIdx][rplsIdx][j]");
          }
          WRITE_FLAG(slice->rpl[0]->deltaPocMSBPresent[i], "delta_poc_msb_present_flag[i][j]");
          if (slice->rpl[0]->deltaPocMSBPresent[i])
          {
            WRITE_UVLC(slice->rpl[0]->deltaPocMSBCycleLT[i], "delta_poc_msb_cycle_lt[i][j]");
          }
        }
      }
    }

    //Write L1 related syntax elements
      if (slice->sps->getNumRPL(1) > 1 && slice->pps->rpl1IdxPresent)
      {
        WRITE_FLAG(slice->rplIdx[1] != -1 ? 1 : 0, "ref_pic_list_sps_flag[1]");
      }
      else if (slice->sps->getNumRPL(1) == 0)
      {
        CHECK(slice->rplIdx[1] != -1, "rpl_sps_flag[1] will be infer to 0 and this is not what was expected");
      }
      else
      {
        auto rplsSpsFlag0 = slice->rplIdx[0] != -1 ? 1 : 0;
        auto rplsSpsFlag1 = slice->rplIdx[1] != -1 ? 1 : 0;
        CHECK(rplsSpsFlag1 != rplsSpsFlag0, "rpl_sps_flag[1] will be infer to 0 and this is not what was expected");
      }

      if (slice->rplIdx[1] != -1)
      {
        if (slice->sps->getNumRPL(1) > 1 && slice->pps->rpl1IdxPresent)
        {
          int numBits = 0;
          while ((1 << numBits) < slice->sps->getNumRPL(1))
          {
            numBits++;
          }
          WRITE_CODE(slice->rplIdx[1], numBits, "ref_pic_list_idx[1]");
        }
        else if (slice->sps->getNumRPL(1) == 1)
        {
          CHECK(slice->rplIdx[1] != 0, "RPL1Idx is not signalled but it is not equal to 0");
        }
        else
        {
          CHECK(slice->rplIdx[1] != slice->rplIdx[0], "RPL1Idx is not signalled but it is not the same as RPL0Idx");
        }
      }
      else
      {  //write local RPL1
        xCodeRefPicList( slice->rpl[1], slice->sps->longTermRefsPresent, slice->sps->bitsForPOC, !(slice->sps->weightPred || slice->sps->weightedBiPred), -1 );
      }
      //Deal POC Msb cycle signalling for LTRP
      if (slice->rpl[1]->numberOfLongtermPictures)
      {
        for (int i = 0; i < slice->rpl[1]->numberOfLongtermPictures + slice->rpl[1]->numberOfShorttermPictures; i++)
        {
          if (slice->rpl[1]->isLongtermRefPic[i])
          {
            if (slice->rpl[1]->ltrpInSliceHeader)
            {
              WRITE_CODE(slice->rpl[1]->refPicIdentifier[i], slice->sps->bitsForPOC,
                         "slice_poc_lsb_lt[listIdx][rplsIdx][j]");
            }
            WRITE_FLAG(slice->rpl[1]->deltaPocMSBPresent[i], "delta_poc_msb_present_flag[i][j]");
            if (slice->rpl[1]->deltaPocMSBPresent[i])
            {
              WRITE_UVLC(slice->rpl[1]->deltaPocMSBCycleLT[i], "delta_poc_msb_cycle_lt[i][j]");
            }
          }
        }
      }
    }

    //check if numrefidxes match the defaults. If not, override

    if ((!slice->isIntra() && slice->rpl[0]->getNumRefEntries() > 1) ||
        (slice->isInterB() && slice->rpl[1]->getNumRefEntries() > 1) )
    {
      int defaultL0 = std::min<int>(slice->rpl[0]->getNumRefEntries(), slice->pps->numRefIdxL0DefaultActive);
      int defaultL1 = slice->isInterB() ? std::min<int>(slice->rpl[1]->getNumRefEntries(), slice->pps->numRefIdxL1DefaultActive) : 0;
      bool overrideFlag = ( slice->numRefIdx[ REF_PIC_LIST_0 ] != defaultL0 || ( slice->isInterB() && slice->numRefIdx[ REF_PIC_LIST_1 ] != defaultL1 ) );
      WRITE_FLAG( overrideFlag ? 1 : 0, "num_ref_idx_active_override_flag" );
      if( overrideFlag )
      {
        if(slice->rpl[0]->getNumRefEntries() > 1)
        {
          WRITE_UVLC( slice->numRefIdx[ REF_PIC_LIST_0 ] - 1, "num_ref_idx_l0_active_minus1" );
        }

        if( slice->isInterB() && slice->rpl[1]->getNumRefEntries() > 1)
        {
          WRITE_UVLC( slice->numRefIdx[ REF_PIC_LIST_1 ] - 1, "num_ref_idx_l1_active_minus1" );
        }
      }
    }

    if( !slice->isIntra() )
    {
      if( !slice->isIntra() && slice->pps->cabacInitPresent )
      {
        const SliceType encCABACTableIdx = slice->encCABACTableIdx;
        bool encCabacInitFlag = ( slice->sliceType != encCABACTableIdx && encCABACTableIdx != VVENC_I_SLICE ) ? true : false;
        WRITE_FLAG( encCabacInitFlag ? 1 : 0, "sh_cabac_init_flag" );
      }
    }

    if( slice->picHeader->enableTMVP  && !slice->pps->rplInfoInPh)
    {
      if(!slice->pps->rplInfoInPh)
      {
        if (slice->sliceType == VVENC_B_SLICE)
        {
          WRITE_FLAG(slice->colFromL0Flag, "sh_collocated_from_l0_flag");
        }
      }

    if( slice->sliceType != VVENC_I_SLICE &&
      ( ( slice->colFromL0Flag == 1 && slice->numRefIdx[ REF_PIC_LIST_0 ] > 1 ) ||
        ( slice->colFromL0Flag == 0 && slice->numRefIdx[ REF_PIC_LIST_1 ] > 1 ) ) )
    {
      WRITE_UVLC( slice->colRefIdx, "sh_collocated_ref_idx" );
    }
  }

  if( ( slice->pps->weightPred && slice->sliceType == VVENC_P_SLICE ) || ( slice->pps->weightedBiPred && slice->sliceType == VVENC_B_SLICE ) )
  {
    if( !slice->pps->wpInfoInPh )
    {
      xCodePredWeightTable( slice );
    }
  }

  if (!slice->pps->qpDeltaInfoInPh)
  {
    WRITE_SVLC(slice->sliceQp - (slice->pps->picInitQPMinus26 + 26), "slice_qp_delta");
  }
  if (slice->pps->sliceChromaQpFlag)
  {
    if (numberValidComponents > COMP_Cb)
    {
      WRITE_SVLC( slice->sliceChromaQpDelta[COMP_Cb], "sh_cb_qp_offset" );
    }
    if (numberValidComponents > COMP_Cr)
    {
      WRITE_SVLC( slice->sliceChromaQpDelta[COMP_Cr], "sh_cr_qp_offset" );
      if (slice->sps->jointCbCr)
      {
        WRITE_SVLC( slice->sliceChromaQpDelta[COMP_JOINT_CbCr], "sh_joint_cbcr_qp_offset");
      }
    }
    CHECK(numberValidComponents < COMP_Cr+1, "Too many valid components");
  }

  if (slice->pps->chromaQpOffsetListLen>0)
  {
    WRITE_FLAG(slice->chromaQpAdjEnabled, "sh_cu_chroma_qp_offset_enabled_flag");
  }

  if( slice->sps->saoEnabled && !slice->pps->saoInfoInPh )
  {
    WRITE_FLAG( slice->saoEnabled[CH_L], "sh_sao_luma_flag" );
    if( chromaEnabled )
    {
      WRITE_FLAG( slice->saoEnabled[CH_C], "sh_sao_chroma_flag" );
    }
  }


  if (slice->pps->deblockingFilterControlPresent && !slice->pps->dbfInfoInPh)
  {
    if (slice->pps->deblockingFilterOverrideEnabled )
    {
      WRITE_FLAG(slice->deblockingFilterOverride, "sh_deblocking_params_present_flag");
    }
    if (slice->deblockingFilterOverride)
    {
      if (!slice->pps->deblockingFilterDisabled)
      {
       WRITE_FLAG(slice->deblockingFilterDisable, "sh_deblocking_filter_disabled_flag");
      }
      if(!slice->deblockingFilterDisable)
      {
        WRITE_SVLC (slice->deblockingFilterBetaOffsetDiv2[COMP_Y],   "slice_beta_offset_div2");
        WRITE_SVLC (slice->deblockingFilterTcOffsetDiv2[COMP_Y],     "slice_tc_offset_div2");
        if( slice->pps->usePPSChromaTool )
        {
          WRITE_SVLC (slice->deblockingFilterBetaOffsetDiv2[COMP_Cb], "slice_cb_beta_offset_div2");
          WRITE_SVLC (slice->deblockingFilterTcOffsetDiv2[COMP_Cb],   "slice_cb_tc_offset_div2");
          WRITE_SVLC (slice->deblockingFilterBetaOffsetDiv2[COMP_Cr], "slice_cr_beta_offset_div2");
          WRITE_SVLC (slice->deblockingFilterTcOffsetDiv2[COMP_Cr],   "slice_cr_tc_offset_div2");
        }
      }
    }
  }

  // dependent quantization
  if( slice->sps->depQuantEnabled )
  {
    WRITE_FLAG(slice->depQuantEnabled, "sh_dep_quant_used_flag");
  }

  // sign data hiding
  if( slice->sps->signDataHidingEnabled && !slice->depQuantEnabled )
  {
    WRITE_FLAG(slice->signDataHidingEnabled, "sh_sign_data_hiding_used_flag" );
  }
  if( slice->sps->transformSkip && !slice->depQuantEnabled && !slice->signDataHidingEnabled )
  {
    WRITE_FLAG(slice->tsResidualCodingDisabled, "sh_ts_residual_coding_disabled_flag");
  }

  if(slice->pps->sliceHeaderExtensionPresent)
  {
    WRITE_UVLC(0,"slice_header_extension_length");
  }
}

void  HLSWriter::codeConstraintInfo  ( const ConstraintInfo* cinfo )
{
  WRITE_FLAG(cinfo->gciPresent,                         "gci_present_flag");
  if (cinfo->gciPresent)
  {
    WRITE_FLAG(cinfo->intraOnlyConstraintFlag,              "gci_intra_only_constraint_flag");
    WRITE_FLAG(cinfo->allLayersIndependentConstraintFlag,   "gci_all_layers_independent_constraint_flag");
    WRITE_FLAG(cinfo->onePictureOnlyConstraintFlag,         "gci_one_au_only_constraint_flag");

    /* picture format */
    WRITE_CODE(16 - cinfo->maxBitDepthConstraintIdc, 4,     "gci_sixteen_minus_max_bitdepth_constraint_idc");
    WRITE_CODE(3 - cinfo->maxChromaFormatConstraintIdc, 2,  "gci_three_minus_max_chroma_format_constraint_idc");

    /* NAL unit type related */
    WRITE_FLAG(cinfo->noMixedNaluTypesInPicConstraintFlag,  "gci_no_mixed_nalu_types_in_pic_constraint_flag");
    WRITE_FLAG(cinfo->noTrailConstraintFlag,                "gci_no_trail_constraint_flag");
    WRITE_FLAG(cinfo->noStsaConstraintFlag,                 "gci_no_stsa_constraint_flag");
    WRITE_FLAG(cinfo->noRaslConstraintFlag,                 "gci_no_rasl_constraint_flag");
    WRITE_FLAG(cinfo->noRadlConstraintFlag,                 "gci_no_radl_constraint_flag");
    WRITE_FLAG(cinfo->noIdrConstraintFlag,                  "gci_no_idr_constraint_flag");
    WRITE_FLAG(cinfo->noCraConstraintFlag,                  "gci_no_cra_constraint_flag");
    WRITE_FLAG(cinfo->noGdrConstraintFlag,                  "gci_no_gdr_constraint_flag");
    WRITE_FLAG(cinfo->noApsConstraintFlag,                  "gci_no_aps_constraint_flag");
    WRITE_FLAG(cinfo->noIdrRplConstraintFlag,               "gci_no_idr_rpl_constraint_flag");

    /* tile, slice, subpicture partitioning */
    WRITE_FLAG(cinfo->oneTilePerPicConstraintFlag,          "gci_one_tile_per_pic_constraint_flag");
    WRITE_FLAG(cinfo->picHeaderInSliceHeaderConstraintFlag, "gci_pic_header_in_slice_header_constraint_flag");
    WRITE_FLAG(cinfo->oneSlicePerPicConstraintFlag,         "gci_one_slice_per_pic_constraint_flag");
    WRITE_FLAG(cinfo->noRectSliceConstraintFlag,            "gci_no_rectangular_slice_constraint_flag");
    WRITE_FLAG(cinfo->oneSlicePerSubpicConstraintFlag,      "gci_one_slice_per_subpic_constraint_flag");
    WRITE_FLAG(cinfo->noSubpicInfoConstraintFlag,           "gci_no_subpic_info_constraint_flag");


    /* CTU and block partitioning */
    WRITE_CODE(3 - (cinfo->maxLog2CtuSizeConstraintIdc - 5), 2, "gci_three_minus_max_log2_ctu_size_constraint_idc");
    WRITE_FLAG(cinfo->noPartitionConstraintsOverrideConstraintFlag, "gci_no_partition_constraints_override_constraint_flag");
    WRITE_FLAG(cinfo->noMttConstraintFlag,                  "gci_no_mtt_constraint_flag");
    WRITE_FLAG(cinfo->noQtbttDualTreeIntraConstraintFlag,   "gci_no_qtbtt_dual_tree_intra_constraint_flag");

    /* intra */
    WRITE_FLAG(cinfo->noPaletteConstraintFlag,              "gci_no_palette_constraint_flag");
    WRITE_FLAG(cinfo->noIbcConstraintFlag,                  "gci_no_ibc_constraint_flag");
    WRITE_FLAG(cinfo->noIspConstraintFlag,                  "gci_no_isp_constraint_flag");
    WRITE_FLAG(cinfo->noMrlConstraintFlag,                  "gci_no_mrl_constraint_flag");
    WRITE_FLAG(cinfo->noMipConstraintFlag,                  "gci_no_mip_constraint_flag");
    WRITE_FLAG(cinfo->noCclmConstraintFlag,                 "gci_no_cclm_constraint_flag");

    /* inter */
    WRITE_FLAG(cinfo->noRprConstraintFlag,                  "gci_no_ref_pic_resampling_constraint_flag");
    WRITE_FLAG(cinfo->noResChangeInClvsConstraintFlag,      "gci_no_res_change_in_clvs_constraint_flag");
    WRITE_FLAG(cinfo->noWeightedPredictionConstraintFlag,   "gci_no_weighted_prediction_constraint_flag");
    WRITE_FLAG(cinfo->noRefWraparoundConstraintFlag,        "gci_no_ref_wraparound_constraint_flag");
    WRITE_FLAG(cinfo->noTemporalMvpConstraintFlag,          "gci_no_temporal_mvp_constraint_flag");
    WRITE_FLAG(cinfo->noSbtmvpConstraintFlag,               "gci_no_sbtmvp_constraint_flag");
    WRITE_FLAG(cinfo->noAmvrConstraintFlag,                 "gci_no_amvr_constraint_flag");
    WRITE_FLAG(cinfo->noBdofConstraintFlag,                 "gci_no_bdof_constraint_flag");
    WRITE_FLAG(cinfo->noSmvdConstraintFlag,                 "gci_no_smvd_constraint_flag");
    WRITE_FLAG(cinfo->noDmvrConstraintFlag,                 "gci_no_dmvr_constraint_flag");
    WRITE_FLAG(cinfo->noMmvdConstraintFlag,                 "gci_no_mmvd_constraint_flag");
    WRITE_FLAG(cinfo->noAffineMotionConstraintFlag,         "gci_no_affine_motion_constraint_flag");
    WRITE_FLAG(cinfo->noProfConstraintFlag,                 "gci_no_prof_constraint_flag");
    WRITE_FLAG(cinfo->noBcwConstraintFlag,                  "gci_no_bcw_constraint_flag");
    WRITE_FLAG(cinfo->noCiipConstraintFlag,                 "gci_no_ciip_constraint_flag");
    WRITE_FLAG(cinfo->noGeoConstraintFlag,                  "gci_no_gpm_constraint_flag");

    /* transform, quantization, residual */
    WRITE_FLAG(cinfo->noLumaTransformSize64ConstraintFlag,  "gci_no_luma_transform_size_64_constraint_flag");
    WRITE_FLAG(cinfo->noTransformSkipConstraintFlag,        "gci_no_transform_skip_constraint_flag");
    WRITE_FLAG(cinfo->noBDPCMConstraintFlag,                "gci_no_bdpcm_constraint_flag");
    WRITE_FLAG(cinfo->noMtsConstraintFlag,                  "gci_no_mts_constraint_flag");
    WRITE_FLAG(cinfo->noLfnstConstraintFlag,                "gci_no_lfnst_constraint_flag");
    WRITE_FLAG(cinfo->noJointCbCrConstraintFlag,            "gci_no_joint_cbcr_constraint_flag");
    WRITE_FLAG(cinfo->noSbtConstraintFlag,                  "gci_no_sbt_constraint_flag");
    WRITE_FLAG(cinfo->noActConstraintFlag,                  "gci_no_act_constraint_flag");
    WRITE_FLAG(cinfo->noExplicitScaleListConstraintFlag,    "gci_no_explicit_scaling_list_constraint_flag");
    WRITE_FLAG(cinfo->noDepQuantConstraintFlag,             "gci_no_dep_quant_constraint_flag");
    WRITE_FLAG(cinfo->noSignDataHidingConstraintFlag,       "gci_no_sign_data_hiding_constraint_flag");
    WRITE_FLAG(cinfo->noQpDeltaConstraintFlag,              "gci_no_qp_delta_constraint_flag");
    WRITE_FLAG(cinfo->noChromaQpOffsetConstraintFlag,       "gci_no_chroma_qp_offset_constraint_flag");

    /* loop filter */
    WRITE_FLAG(cinfo->noSaoConstraintFlag,                  "gci_no_sao_constraint_flag");
    WRITE_FLAG(cinfo->noAlfConstraintFlag,                  "gci_no_alf_constraint_flag");
    WRITE_FLAG(cinfo->noCCAlfConstraintFlag,                "gci_no_ccalf_constraint_flag");
    WRITE_FLAG(cinfo->noLmcsConstraintFlag,                 "gci_no_lmcs_constraint_flag");
    WRITE_FLAG(cinfo->noLadfConstraintFlag,                 "gci_no_ladf_constraint_flag");
    WRITE_FLAG(cinfo->noVirtualBoundaryConstraintFlag,      "gci_no_virtual_boundaries_constraint_flag");

    //The value of gci_num_reserved_bits shall be equal to 0 in bitstreams conforming to this version of this Specification.
    //Other values of gci_num_reserved_bits are reserved for future use by ITU-T | ISO/IEC.
    WRITE_CODE(0, 8,                                        "gci_num_reserved_bits");
  }

  while (!isByteAligned())
  {
    WRITE_FLAG(0, "gci_alignment_zero_bit");
  }
}


void  HLSWriter::codeProfileTierLevel    ( const ProfileTierLevel* ptl, bool profileTierPresent, int maxNumSubLayersMinus1 )
{
  if(profileTierPresent)
  {
    WRITE_CODE( (uint32_t)ptl->profileIdc, 7 ,        "general_profile_idc"                     );
    WRITE_FLAG( ptl->tierFlag==vvencTier::VVENC_TIER_HIGH,           "general_tier_flag"                       );
  }

  WRITE_CODE( (uint32_t)ptl->levelIdc, 8 ,            "general_level_idc");
  WRITE_FLAG( ptl->frameOnlyConstraintFlag,           "ptl_frame_only_constraint_flag" );
  WRITE_FLAG( ptl->multiLayerEnabledFlag,             "ptl_multilayer_enabled_flag"    );
  if(profileTierPresent)
  {
    codeConstraintInfo( &ptl->constraintInfo );
  }

  for (int i = maxNumSubLayersMinus1 - 1; i >= 0; i--)
  {
    WRITE_FLAG( ptl->subLayerLevelPresent[i],         "sub_layer_level_present_flag[i]" );
  }

  while (!isByteAligned())
  {
    WRITE_FLAG(0,                                     "ptl_reserved_zero_bit");
  }

  for (int i = maxNumSubLayersMinus1 - 1; i >= 0; i--)
  {
    if( ptl->subLayerLevelPresent[i] )
    {
      WRITE_CODE( (uint32_t)ptl->subLayerLevelIdc[i], 8, "sub_layer_level_idc[i]" );
    }
  }

  if (profileTierPresent)
  {
    WRITE_CODE(ptl->numSubProfile, 8, "ptl_num_sub_profiles");
    for (int i = 0; i < ptl->numSubProfile; i++)
    {
      WRITE_CODE(ptl->subProfileIdc[i], 32, "general_sub_profile_idc[i]");
    }
  }
}


/**
* Write tiles and wavefront substreams sizes for the slice header (entry points).
*
* \param pSlice Slice structure that contains the substream size information.
*/
void  HLSWriter::codeTilesWPPEntryPoint( Slice* pSlice )
{
  int numEntryPoints = pSlice->getNumEntryPoints( *pSlice->sps, *pSlice->pps );
  if( numEntryPoints == 0 )
  {
    return;
  }

  uint32_t maxOffset = 0;
  for(int idx=0; idx<pSlice->getNumberOfSubstreamSizes(); idx++)
  {
    uint32_t offset=pSlice->getSubstreamSize(idx);
    if ( offset > maxOffset )
    {
      maxOffset = offset;
    }
  }

  // Determine number of bits "offsetLenMinus1+1" required for entry point information
  uint32_t offsetLenMinus1 = 0;
  while (maxOffset >= (1u << (offsetLenMinus1 + 1)))
  {
    offsetLenMinus1++;
    CHECK(offsetLenMinus1 + 1 >= 32, "Invalid offset length minus 1");
  }

  if (pSlice->getNumberOfSubstreamSizes()>0)
  {
    WRITE_UVLC(offsetLenMinus1, "sh_entry_offset_len_minus1");

    for (uint32_t idx=0; idx<pSlice->getNumberOfSubstreamSizes(); idx++)
    {
      WRITE_CODE(pSlice->getSubstreamSize(idx)-1, offsetLenMinus1+1, "sh_entry_point_offset_minus1");
    }
  }
}


// ====================================================================================================================
// Protected member functions
// ====================================================================================================================

//! Code weighted prediction tables
void HLSWriter::xCodePredWeightTable( const Slice* slice )
{
  WPScalingParam      *wp;
  const ChromaFormat  format                = slice->sps->chromaFormatIdc;
  const uint32_t      numberValidComponents = getNumberValidComponents(format);
  const bool          bChroma               = isChromaEnabled(format);
  const int           iNbRef                = (slice->sliceType == VVENC_B_SLICE ) ? (2) : (1);
  bool                bDenomCoded           = false;
  uint32_t            uiTotalSignalledWeightFlags = 0;

  if ( (slice->sliceType==VVENC_P_SLICE && slice->pps->weightPred) || (slice->sliceType==VVENC_B_SLICE && slice->pps->weightedBiPred) )
  {
    for ( int iNumRef=0 ; iNumRef<iNbRef ; iNumRef++ ) // loop over l0 and l1 syntax elements
    {
      RefPicList  refPicList = ( iNumRef ? REF_PIC_LIST_1 : REF_PIC_LIST_0 );

      // NOTE: wp[].log2WeightDenom and wp[].presentFlag are actually per-channel-type settings.

      for ( int iRefIdx=0 ; iRefIdx<slice->numRefIdx[ refPicList ] ; iRefIdx++ )
      {
        slice->getWpScaling(refPicList, iRefIdx, wp);
        if ( !bDenomCoded )
        {
          int iDeltaDenom;
          WRITE_UVLC( wp[COMP_Y].log2WeightDenom, "luma_log2_weight_denom" );

          if( bChroma )
          {
            CHECK( wp[COMP_Cb].log2WeightDenom != wp[COMP_Cr].log2WeightDenom, "Chroma blocks of different size not supported" );
            iDeltaDenom = (wp[COMP_Cb].log2WeightDenom - wp[COMP_Y].log2WeightDenom);
            WRITE_SVLC( iDeltaDenom, "delta_chroma_log2_weight_denom" );
          }
          bDenomCoded = true;
        }
        WRITE_FLAG( wp[COMP_Y].presentFlag, iNumRef==0?"luma_weight_l0_flag[i]":"luma_weight_l1_flag[i]" );
        uiTotalSignalledWeightFlags += wp[COMP_Y].presentFlag;
      }
      if (bChroma)
      {
        for ( int iRefIdx=0 ; iRefIdx<slice->numRefIdx[ refPicList ] ; iRefIdx++ )
        {
          slice->getWpScaling( refPicList, iRefIdx, wp );
          CHECK( wp[COMP_Cb].presentFlag != wp[COMP_Cr].presentFlag, "Inconsistent settings for chroma channels" );
          WRITE_FLAG( wp[COMP_Cb].presentFlag, iNumRef==0?"chroma_weight_l0_flag[i]":"chroma_weight_l1_flag[i]" );
          uiTotalSignalledWeightFlags += 2*wp[COMP_Cb].presentFlag;
        }
      }

      for ( int iRefIdx=0 ; iRefIdx<slice->numRefIdx[ refPicList ] ; iRefIdx++ )
      {
        slice->getWpScaling(refPicList, iRefIdx, wp);
        if ( wp[COMP_Y].presentFlag )
        {
          int iDeltaWeight = (wp[COMP_Y].iWeight - (1<<wp[COMP_Y].log2WeightDenom));
          WRITE_SVLC( iDeltaWeight, iNumRef==0?"delta_luma_weight_l0[i]":"delta_luma_weight_l1[i]" );
          WRITE_SVLC( wp[COMP_Y].iOffset, iNumRef==0?"luma_offset_l0[i]":"luma_offset_l1[i]" );
        }

        if ( bChroma )
        {
          if ( wp[COMP_Cb].presentFlag )
          {
            for ( int j = COMP_Cb ; j < numberValidComponents ; j++ )
            {
              CHECK(wp[COMP_Cb].log2WeightDenom != wp[COMP_Cr].log2WeightDenom, "Chroma blocks of different size not supported");
              int iDeltaWeight = (wp[j].iWeight - (1<<wp[COMP_Cb].log2WeightDenom));
              WRITE_SVLC( iDeltaWeight, iNumRef==0?"delta_chroma_weight_l0[i]":"delta_chroma_weight_l1[i]" );

              int range=128;
              int pred = ( range - ( ( range*wp[j].iWeight)>>(wp[j].log2WeightDenom) ) );
              int iDeltaChroma = (wp[j].iOffset - pred);
              WRITE_SVLC( iDeltaChroma, iNumRef==0?"delta_chroma_offset_l0[i]":"delta_chroma_offset_l1[i]" );
            }
          }
        }
      }
    }
    CHECK(uiTotalSignalledWeightFlags>24, "Too many signalled weight flags");
  }
}


void HLSWriter::xCodePredWeightTable( const PicHeader *picHeader, const PPS *pps, const SPS *sps )
{
  WPScalingParam  *wp;
  const ChromaFormat  format                = sps->chromaFormatIdc;
  const uint32_t      numberValidComponents = getNumberValidComponents(format);
  const bool          bChroma               = isChromaEnabled(format);
  bool                bDenomCoded           = false;
  uint32_t            uiTotalSignalledWeightFlags = 0;
  uint32_t            numLxWeights                = picHeader->numL0Weights;
  bool                moreSyntaxToBeParsed        = true;
  for (int iNumRef = 0; iNumRef < NUM_REF_PIC_LIST_01 && moreSyntaxToBeParsed; iNumRef++)   // loop over l0 and l1 syntax elements
  {
    RefPicList  refPicList = ( iNumRef ? REF_PIC_LIST_1 : REF_PIC_LIST_0 );

    // NOTE: wp[].log2WeightDenom and wp[].presentFlag are actually per-channel-type settings.

    for ( int iRefIdx=0 ; iRefIdx<numLxWeights ; iRefIdx++ )
    {
      picHeader->getWpScaling(refPicList, iRefIdx, wp);
      if ( !bDenomCoded )
      {
        int iDeltaDenom;
        WRITE_UVLC( wp[COMP_Y].log2WeightDenom, "luma_log2_weight_denom" );

        if( bChroma )
        {
          CHECK( wp[COMP_Cb].log2WeightDenom != wp[COMP_Cr].log2WeightDenom, "Chroma blocks of different size not supported" );
          iDeltaDenom = (wp[COMP_Cb].log2WeightDenom - wp[COMP_Y].log2WeightDenom);
          WRITE_SVLC( iDeltaDenom, "delta_chroma_log2_weight_denom" );
        }
        bDenomCoded = true;
      }
      WRITE_FLAG( wp[COMP_Y].presentFlag, iNumRef==0?"luma_weight_l0_flag[i]":"luma_weight_l1_flag[i]" );
      uiTotalSignalledWeightFlags += wp[COMP_Y].presentFlag;
    }
    if (bChroma)
    {
      for ( int iRefIdx=0 ; iRefIdx<numLxWeights; iRefIdx++ )
      {
        picHeader->getWpScaling( refPicList, iRefIdx, wp );
        CHECK( wp[COMP_Cb].presentFlag != wp[COMP_Cr].presentFlag, "Inconsistent settings for chroma channels" );
        WRITE_FLAG( wp[COMP_Cb].presentFlag, iNumRef==0?"chroma_weight_l0_flag[i]":"chroma_weight_l1_flag[i]" );
        uiTotalSignalledWeightFlags += 2*wp[COMP_Cb].presentFlag;
      }
    }

    for ( int iRefIdx=0 ; iRefIdx<numLxWeights; iRefIdx++ )
    {
      picHeader->getWpScaling(refPicList, iRefIdx, wp);
      if ( wp[COMP_Y].presentFlag )
      {
        int iDeltaWeight = (wp[COMP_Y].iWeight - (1<<wp[COMP_Y].log2WeightDenom));
        WRITE_SVLC( iDeltaWeight, iNumRef==0?"delta_luma_weight_l0[i]":"delta_luma_weight_l1[i]" );
        WRITE_SVLC( wp[COMP_Y].iOffset, iNumRef==0?"luma_offset_l0[i]":"luma_offset_l1[i]" );
      }

      if ( bChroma )
      {
        if ( wp[COMP_Cb].presentFlag )
        {
          for ( int j = COMP_Cb ; j < numberValidComponents ; j++ )
          {
            CHECK(wp[COMP_Cb].log2WeightDenom != wp[COMP_Cr].log2WeightDenom, "Chroma blocks of different size not supported");
            int iDeltaWeight = (wp[j].iWeight - (1<<wp[COMP_Cb].log2WeightDenom));
            WRITE_SVLC( iDeltaWeight, iNumRef==0?"delta_chroma_weight_l0[i]":"delta_chroma_weight_l1[i]" );

            int range=128;
            int pred = ( range - ( ( range*wp[j].iWeight)>>(wp[j].log2WeightDenom) ) );
            int iDeltaChroma = (wp[j].iOffset - pred);
            WRITE_SVLC( iDeltaChroma, iNumRef==0?"delta_chroma_offset_l0[i]":"delta_chroma_offset_l1[i]" );
          }
        }
      }
    }
    if (iNumRef == 0 )
    {
      numLxWeights = picHeader->numL1Weights;
      if (pps->weightedBiPred == 0) 
      {
        numLxWeights = 0;
      }
      else if (picHeader->pRPL[1]->getNumRefEntries() > 0)
      {
        WRITE_UVLC(numLxWeights, "num_l1_weights");
      }
      moreSyntaxToBeParsed = (numLxWeights == 0) ? false : true;
    }
  }
  CHECK(uiTotalSignalledWeightFlags>24, "Too many signalled weight flags");
}

void HLSWriter::alfFilter( const AlfParam& alfParam, const bool isChroma, const int altIdx )
{
  AlfFilterShape alfShape(isChroma ? 5 : 7);
  const short* coeff = isChroma ? alfParam.chromaCoeff[altIdx] : alfParam.lumaCoeff;
  const short* clipp = isChroma ? alfParam.chromaClipp[altIdx] : alfParam.lumaClipp;
  const int numFilters = isChroma ? 1 : alfParam.numLumaFilters;

  // vlc for all

  // Filter coefficients
  for( int ind = 0; ind < numFilters; ++ind )
  {
    for( int i = 0; i < alfShape.numCoeff - 1; i++ )
    {
      WRITE_UVLC( abs(coeff[ ind* MAX_NUM_ALF_LUMA_COEFF + i ]), isChroma ? "alf_chroma_coeff_abs" : "alf_luma_coeff_abs" ); //alf_coeff_chroma[i], alf_coeff_luma_delta[i][j]
      if( abs( coeff[ ind* MAX_NUM_ALF_LUMA_COEFF + i ] ) != 0 )
      {
        WRITE_FLAG( ( coeff[ ind* MAX_NUM_ALF_LUMA_COEFF + i ] < 0 ) ? 1 : 0, isChroma ? "alf_chroma_coeff_sign" : "alf_luma_coeff_sign" );
      }
    }
  }

  // Clipping values coding
  if( alfParam.nonLinearFlag[isChroma] )
  {
    for (int ind = 0; ind < numFilters; ++ind)
    {
      for (int i = 0; i < alfShape.numCoeff - 1; i++)
      {
        WRITE_CODE(clipp[ind* MAX_NUM_ALF_LUMA_COEFF + i], 2, isChroma ? "alf_chroma_clip_idx" : "alf_luma_clip_idx");
      }
    }
  }
}

} // namespace vvenc

//! \}


Coverage Report

Created: 2026-05-30 06:10