Aligned clipping after inverse transform with VVC specification

source/Lib/CommonLib/TrQuant.cpp

@@ -812,6 +812,8 @@ void TrQuant::xIT( const TransformUnit &tu, const ComponentID &compID, const CCo
   const int      TRANSFORM_MATRIX_SHIFT = g_transformMatrixShift[TRANSFORM_INVERSE];
   const TCoeff   clipMinimum            = -( 1 << maxLog2TrDynamicRange );
   const TCoeff   clipMaximum            =  ( 1 << maxLog2TrDynamicRange ) - 1;
+  const TCoeff   pelMinimum             = std::numeric_limits<Pel>::min();
+  const TCoeff   pelMaximum             = std::numeric_limits<Pel>::max();
   const uint32_t transformWidthIndex    = floorLog2(width ) - 1;                                // nLog2WidthMinus1, since transform start from 2-point
   const uint32_t transformHeightIndex   = floorLog2(height) - 1;                                // nLog2HeightMinus1, since transform start from 2-point
 
@@ -844,22 +846,22 @@ void TrQuant::xIT( const TransformUnit &tu, const ComponentID &compID, const CCo
     CHECK( shift_1st < 0, "Negative shift" );
     CHECK( shift_2nd < 0, "Negative shift" );
     TCoeff *tmp = ( TCoeff * ) alloca( width * height * sizeof( TCoeff ) );
-  fastInvTrans[trTypeVer][transformHeightIndex](pCoeff.buf, tmp, shift_1st, width, skipWidth, skipHeight, clipMinimum, clipMaximum);
-  fastInvTrans[trTypeHor][transformWidthIndex] (tmp,      block, shift_2nd, height,         0, skipWidth, clipMinimum, clipMaximum);
+    fastInvTrans[trTypeVer][transformHeightIndex](pCoeff.buf, tmp, shift_1st, width, skipWidth, skipHeight, clipMinimum, clipMaximum);
+    fastInvTrans[trTypeHor][transformWidthIndex] (tmp,      block, shift_2nd, height,        0, skipWidth,  pelMinimum,  pelMaximum);
   }
   else if( width == 1 ) //1-D vertical transform
   {
     int shift = ( TRANSFORM_MATRIX_SHIFT + maxLog2TrDynamicRange - 1 ) - bitDepth + COM16_C806_TRANS_PREC;
     CHECK( shift < 0, "Negative shift" );
     CHECK( ( transformHeightIndex < 0 ), "There is a problem with the height." );
-    fastInvTrans[trTypeVer][transformHeightIndex]( pCoeff.buf, block, shift + 1, 1, 0, skipHeight, clipMinimum, clipMaximum );
+    fastInvTrans[trTypeVer][transformHeightIndex]( pCoeff.buf, block, shift + 1, 1, 0, skipHeight, pelMinimum, pelMaximum );
   }
   else //if(iHeight == 1) //1-D horizontal transform
   {
     const int      shift              = ( TRANSFORM_MATRIX_SHIFT + maxLog2TrDynamicRange - 1 ) - bitDepth + COM16_C806_TRANS_PREC;
     CHECK( shift < 0, "Negative shift" );
     CHECK( ( transformWidthIndex < 0 ), "There is a problem with the width." );
-    fastInvTrans[trTypeHor][transformWidthIndex]( pCoeff.buf, block, shift + 1, 1, 0, skipWidth, clipMinimum, clipMaximum );
+    fastInvTrans[trTypeHor][transformWidthIndex]( pCoeff.buf, block, shift + 1, 1, 0, skipWidth, pelMinimum, pelMaximum );
   }
 
   Pel *resiBuf    = pResidual.buf;