public MacroBlockLayer(SequenceParameterSet sps, PictureParameterSet pps, SliceHeader header, SliceData data)
{
_sliceType = header.SliceType;
_sps = sps;
_pps = pps;
_header = header;
_data = data;
_mbTypeParser = _data.MBTypeParser;
_cbp = _data.CBP;
_mbQPD = _data.MBQPD;
}
public MacroBlockLayer(SequenceParameterSet sps, PictureParameterSet pps, SliceHeader header, SliceData data)
{
_sliceType = header.SliceType;
_sps = sps;
_pps = pps;
_header = header;
_data = data;
_mbTypeParser = _data.MBTypeParser;
_cbp = _data.CBP;
_mbQPD = _data.MBQPD;
}
public SliceData(SequenceParameterSet sps, PictureParameterSet pps, SliceHeader header)
{
_sps = sps;
_pps = pps;
_header = header;
if (_pps.EntropyCodingModeFlag)
{
MBTypeParser = new MBTypeCABACParser(_pps, header);
CBP = new CodedBlockPattern(_pps, _header);
MBQPD = new MBQPDelta(_pps, _header);
}
}
public SliceData(SequenceParameterSet sps, PictureParameterSet pps, SliceHeader header)
{
_sps = sps;
_pps = pps;
_header = header;
if (_pps.EntropyCodingModeFlag)
{
MBTypeParser = new MBTypeCABACParser(_pps, header);
CBP = new CodedBlockPattern(_pps, _header);
MBQPD = new MBQPDelta(_pps, _header);
}
}
public CABACBaseClass(PictureParameterSet pps, SliceHeader sliceHeader)
{
_pps = pps;
_header = sliceHeader;
}
public CodedSliceWithoutPartition(SequenceParameterSet sps, PictureParameterSet pps,
Byte idc, NALUnitType naluType, uint size)
: base(sps, pps, idc, naluType, size)
{
}
private bool _firstMacroBlock; // if true, no macroblock has been processed for slice
public MBTypeCABACParser(PictureParameterSet pps, SliceHeader header) : base(pps, header)
{
_firstMacroBlock = true;
}
public CodedSlicePartitionA(SequenceParameterSet sps, PictureParameterSet pps, byte idc, uint size)
: base(sps, pps, idc, NALUnitType.SlicePartitionA, size)
{
}
public CABACBaseClass(PictureParameterSet pps, SliceHeader sliceHeader)
{
_pps = pps;
_header = sliceHeader;
}
public CodedSliceNonIDR(SequenceParameterSet sps, PictureParameterSet pps, byte idc, uint size)
: base(sps, pps, idc, NALUnitType.NonIDRSlice, size)
{
}
public CodedSliceIDR(SequenceParameterSet sps, PictureParameterSet pps, uint size)
: base(sps, pps, (byte)1, NALUnitType.IDRSlice, size)
{
}
public CodedSlicePartitionBorC(SequenceParameterSet sps, PictureParameterSet pps,
byte idc, NALUnitType naluType, uint size)
: base(sps, pps, (byte)0, NALUnitType.SlicePartitionA, size)
{
_pps = pps;
}
public CodedSlicePartitionBorC(SequenceParameterSet sps, PictureParameterSet pps,
byte idc, NALUnitType naluType, uint size)
: base(sps, pps, (byte)0, NALUnitType.SlicePartitionA, size)
{
_pps = pps;
}
public CodedBlockPattern(PictureParameterSet pps, SliceHeader header) : base(pps, header)
{
}
public SliceHeader(SequenceParameterSet sps, PictureParameterSet pps, NetworkAbstractionLayerUnit nalu)
{
_nalu = nalu;
_sps = sps;
_pps = pps;
}
public SliceData(SequenceParameterSet sps, PictureParameterSet pps, SliceHeader header, NetworkAbstractionLayerUnit nalu)
: this(sps, pps, header)
{
_nalu = nalu;
}
public CodedSliceWithoutPartition(SequenceParameterSet sps, PictureParameterSet pps,
Byte idc, NALUnitType naluType, uint size)
: base(sps, pps, idc, naluType, size)
{
}
void ParseThreadProc(object buffer)
{
byte[] sliceBytes = buffer as byte[];
BitReader br = new BitReader(new MemoryStream(sliceBytes));
int totalSize = _totalSize;
int offset = 0;
int state = 0;
while (totalSize > 4)
{
int naluLen = (int)br.GetUIntFromNBits(32);
if (naluLen > totalSize)
{
throw new Exception("H264 parsing: wrong byte count encountered");
}
if (naluLen > 0)
{
byte b = br.PeekByte();
byte refIDC = (byte)(b >> 5);
NALUnitType naluType = (NALUnitType)(b & 0x1F);
switch (state)
{
case 0:
AccessUnitDelimiter aud = new AccessUnitDelimiter((uint)naluLen);
aud.Read(br);
state = 1;
break;
case 1:
// either SEI or SPS (if it's an SEI, don't change state)
if (naluType == NALUnitType.SupplementalEnhancementInfo)
{
SupplementatlEnhancementMessage sei = new SupplementatlEnhancementMessage(_sps, (uint)naluLen);
sei.Read(br);
}
else if (naluType == NALUnitType.SequenceParamSet)
{
// replace _sps
_sps = new SequenceParameterSet((uint)naluLen);
_sps.Read(br);
}
else if (naluType == NALUnitType.PictureParamSet)
{
// replace _pps
_pps = new PictureParameterSet((uint)naluLen);
_pps.Read(br);
}
else if (naluType == NALUnitType.IDRSlice)
{
CodedSliceIDR idr = new CodedSliceIDR(_sps, _pps, (uint)naluLen);
idr.Read(br);
SliceType = idr.Header.SliceType;
FrameNum = idr.Header.FrameNum;
state = 2; // next should be zero or more redundant coded pictures
}
else if (naluType == NALUnitType.NonIDRSlice)
{
CodedSliceNonIDR nonIdr = new CodedSliceNonIDR(_sps, _pps, GetIDC(refIDC), (uint)naluLen);
nonIdr.Read(br);
SliceType = nonIdr.Header.SliceType;
FrameNum = nonIdr.Header.FrameNum;
state = 2; // next should be zero or more redundant coded pictures
}
else if (naluType == NALUnitType.SlicePartitionA)
{
CodedSlicePartitionA partA = new CodedSlicePartitionA(_sps, _pps, GetIDC(refIDC), (uint)naluLen);
partA.Read(br);
SliceType = partA.Header.SliceType;
FrameNum = partA.Header.FrameNum;
state = 2; // next should be zero or more redundant coded pictures
}
else if ((naluType == NALUnitType.SlicePartitionB) || (naluType == NALUnitType.SlicePartitionC))
{
CodedSlicePartitionBorC partBC = new CodedSlicePartitionBorC(_sps, _pps, GetIDC(refIDC), naluType, (uint)naluLen);
partBC.Read(br);
// FIXME: check that SliceType and FrameNum are set at this point
state = 2; // next should be zero or more redundant coded pictures
}
break;
case 2:
// either coded picture or end of sequence
break;
default:
break;
}
offset += naluLen;
totalSize -= (naluLen + 4);
}
else
{
naluLen = 0; // debugging break point
}
}
if (SampleDoneEvent != null)
{
SampleDoneEvent(this);
}
}
public H264Sample(SequenceParameterSet sps, PictureParameterSet pps, int size)
{
_sps = sps;
_pps = pps;
_totalSize = size;
}
public SliceData(SequenceParameterSet sps, PictureParameterSet pps, SliceHeader header, NetworkAbstractionLayerUnit nalu) : this(sps, pps, header)
{
_nalu = nalu;
}
public CodedSliceBase(SequenceParameterSet sps, PictureParameterSet pps, Byte idc, NALUnitType naluType, uint size)
{
Nalu = new NetworkAbstractionLayerUnit(idc, naluType, size);
Header = new SliceHeader(sps, pps, Nalu);
Data = new SliceData(sps, pps, Header, Nalu);
}
private bool _firstMacroBlock; // if true, no macroblock has been processed for slice
#endregion Fields
#region Constructors
public MBTypeCABACParser(PictureParameterSet pps, SliceHeader header)
: base(pps, header)
{
_firstMacroBlock = true;
}
public CodedSliceNonIDR(SequenceParameterSet sps, PictureParameterSet pps, byte idc, uint size)
: base(sps, pps, idc, NALUnitType.NonIDRSlice, size)
{
}
public CodedSliceBase(SequenceParameterSet sps, PictureParameterSet pps, Byte idc, NALUnitType naluType, uint size)
{
Nalu = new NetworkAbstractionLayerUnit(idc, naluType, size);
Header = new SliceHeader(sps, pps, Nalu);
Data = new SliceData(sps, pps, Header, Nalu);
}
public CodedBlockPattern(PictureParameterSet pps, SliceHeader header)
: base(pps, header)
{
}
public MBQPDelta(PictureParameterSet pps, SliceHeader header) : base(pps, header)
{
}
public MBQPDelta(PictureParameterSet pps, SliceHeader header)
: base(pps, header)
{
}
public SliceHeader(SequenceParameterSet sps, PictureParameterSet pps, NetworkAbstractionLayerUnit nalu)
{
_nalu = nalu;
_sps = sps;
_pps = pps;
}
public CodedSliceIDR(SequenceParameterSet sps, PictureParameterSet pps, uint size)
: base(sps, pps, (byte)1, NALUnitType.IDRSlice, size)
{
}
public CodedSlicePartitionA(SequenceParameterSet sps, PictureParameterSet pps, byte idc, uint size)
: base(sps, pps, idc, NALUnitType.SlicePartitionA, size)
{
}
private PictureParameterSet ParsePPS(byte[] data)
{
PictureParameterSet pps = new PictureParameterSet((uint)data.Length);
H264.BitReader bitReader = new H264.BitReader(new MemoryStream(data));
pps.Read(bitReader);
bitReader.Close();
return pps;
}
