// 7.3.5.1 Macroblock prediction syntax
private void MacroBlockPrediction(IMacroblockType macroBlockType)
{
if (macroBlockType.IsIntra4X4 || macroBlockType.IsIntra16X16)
{
if (macroBlockType.IsIntra4X4)
{
int lumaSubBlocks = _mbFlags.TransformSize8X8Flag ? 4 : 16;
for (int i = 0; i < lumaSubBlocks; i++)
{
if (GetPrevIntra4X4PredModeFlag() == 0) // prev_intra4x4_pred_mode_flag[luma4x4BlkIdx])
{
GetRemIntra4X4PredMode(); // rem_intra4x4_pred_mode[luma4x4BlkIdx]
}
}
}
if (_sequenceState.IsChromaSubsampling)
{
GetIntraChromaPredMode(); // intra_chroma_pred_mode
}
}
else if (!macroBlockType.IsDirect)
{
uint numMbPart = macroBlockType.NumMbPart; // either 1 or 2
MacroblockPartitioning macroblockPartitioning = macroBlockType.MacroblockPartitioning;
uint referencePictureCount0 = _sliceState.ActiveReferencePictureCount0; //defaults to _pictureState.DefaultReferencePictureCount0;
if (HasReferencePictureIndex(referencePictureCount0))
{
var referencePictureIndex = new ReferencePictureIndex(_mbStateA.RefIdxL0, _mbStateB.RefIdxL0);
for (uint i = 0; i < numMbPart; i++)
{
if (macroBlockType.IsList0Predicted(i))
{
uint idx = macroblockPartitioning[i].Idx;
if (GetReferencePicture(referencePictureCount0, referencePictureIndex.GetCtxIdxInc(idx))) // ref_idx_l0[ mbPartIdx ]
{
referencePictureIndex.SetNonZeroRefIdx(idx);
}
}
}
_currMbState.RefIdxL0 = referencePictureIndex.Bits;
}
uint referencePictureCount1 = _sliceState.ActiveReferencePictureCount1; //defaults to _pictureState.DefaultReferencePictureCount1;
if (HasReferencePictureIndex(referencePictureCount1))
{
var referencePictureIndex = new ReferencePictureIndex(_mbStateA.RefIdxL1, _mbStateB.RefIdxL1);
for (uint i = 0; i < numMbPart; i++)
{
if (macroBlockType.IsList1Predicted(i))
{
uint idx = macroblockPartitioning[i].Idx;
if (GetReferencePicture(referencePictureCount1, referencePictureIndex.GetCtxIdxInc(idx))) // ref_idx_l1[ mbPartIdx ]
{
referencePictureIndex.SetNonZeroRefIdx(idx);
}
}
}
_currMbState.RefIdxL1 = referencePictureIndex.Bits;
}
for (uint i = 0; i < numMbPart; i++)
{
if (macroBlockType.IsList0Predicted(i))
{
GetMotionVector(_motionFieldL0, macroblockPartitioning[i]); // mvd_l0[ i ][ 0 ][ compIdx ]
}
}
for (uint i = 0; i < numMbPart; i++)
{
if (macroBlockType.IsList1Predicted(i))
{
GetMotionVector(_motionFieldL1, macroblockPartitioning[i]); // mvd_l1[ i ][ 0 ][ compIdx ]
}
}
}
}
// 7.3.5.1 Macroblock prediction syntax
private void MacroBlockPrediction(IMacroblockType macroBlockType, bool transformSize8X8Flag)
{
if (macroBlockType.IsIntra4X4 || macroBlockType.IsIntra16X16)
{
if (macroBlockType.IsIntra4X4)
{
uint lumaSubBlocks = transformSize8X8Flag ? 4U : 16U;
for (uint i = 0; i < lumaSubBlocks; i++)
{
if (!_reader.GetBit()) // prev_intra4x4_pred_mode_flag[luma4x4BlkIdx])
{
_reader.GetBits(3); // rem_intra4x4_pred_mode[luma4x4BlkIdx]
}
}
}
if (_sequenceState.IsChromaSubsampling)
{
_reader.GetExpGolombCoded(); // intra_chroma_pred_mode
}
}
else if (!macroBlockType.IsDirect)
{
uint numMbPart = macroBlockType.NumMbPart; // either 1 or 2
uint referencePictureCount0 = _sliceState.ActiveReferencePictureCount0; //defaults to _pictureState.DefaultReferencePictureCount0;
if (HasReferencePictureIndex(referencePictureCount0))
{
for (uint i = 0; i < numMbPart; i++)
{
if (macroBlockType.IsList0Predicted(i))
{
GetReferencePicture(referencePictureCount0); // ref_idx_l0[ mbPartIdx ]
}
}
}
uint referencePictureCount1 = _sliceState.ActiveReferencePictureCount1; //defaults to _pictureState.DefaultReferencePictureCount1;
if (HasReferencePictureIndex(referencePictureCount1))
{
for (uint i = 0; i < numMbPart; i++)
{
if (macroBlockType.IsList1Predicted(i))
{
GetReferencePicture(referencePictureCount1); // ref_idx_l1[ mbPartIdx ]
}
}
}
for (uint i = 0; i < numMbPart; i++)
{
if (macroBlockType.IsList0Predicted(i))
{
GetMotionVector(); // mvd_l0[ i ][ 0 ][ compIdx ]
}
}
for (uint i = 0; i < numMbPart; i++)
{
if (macroBlockType.IsList1Predicted(i))
{
GetMotionVector(); // mvd_l1[ i ][ 0 ][ compIdx ]
}
}
}
}
