public NalUnitStreamParser(INalUnitParser nalUnitParser, IH264State state)
{
_nalUnitParser = nalUnitParser;
_state = state;
_nalUnitStartByteLongLengthPrefix = new bool[256];
_nalUnitStartByteShortLengthPrefix = new bool[256];
for (int nalRefIdc = 0; nalRefIdc <= 3; nalRefIdc++)
{
int nonIdrPictureSliceIndex = (nalRefIdc << 5) | (int)NalUnitType.CodedSliceOfANonIdrPicture;
_nalUnitStartByteLongLengthPrefix[nonIdrPictureSliceIndex] = true;
}
for (int nalRefIdc = 1; nalRefIdc <= 3; nalRefIdc++)
{
int nalRefIdcBits = (nalRefIdc << 5);
_nalUnitStartByteLongLengthPrefix[nalRefIdcBits | (int)NalUnitType.CodedSliceOfAnIdrPicture] = true;
_nalUnitStartByteShortLengthPrefix[nalRefIdcBits | (int)NalUnitType.SequenceParameterSet] = true;
_nalUnitStartByteShortLengthPrefix[nalRefIdcBits | (int)NalUnitType.PictureParameterSet] = true;
}
Configurable <H264Detector.ConfigurationKey> configurable = H264Detector.Configurable;
_minSliceNalUnitLength = (uint)configurable[H264Detector.ConfigurationKey.MinSliceNalUnitLength];
_maxSliceNalUnitLength = (uint)configurable[H264Detector.ConfigurationKey.MaxSliceNalUnitLength];
}
public void ParseOneNalUnit(INalUnitParser parser, IResultNodeState resultState, long nalUnitEndPosition)
{
long startPosition = Position;
IList <uint> sanitizedPositions = new List <uint>();
var unitReader = NalUnitReader(nalUnitEndPosition, sanitizedPositions);
unitReader.Result = resultState;
parser.Parse(unitReader, resultState);
// Synchronize real data reader with end of NAL unit
Position = startPosition + GetRawOffset(sanitizedPositions, (uint)unitReader.Position);
//Console.WriteLine("(Non-)Validated NAL unit of {0} bytes", (Position - startPosition));
ReadTrailingZeroBytes((uint)Math.Min(16, (nalUnitEndPosition - Position)));
if (Position != nalUnitEndPosition)
{
// TODO: er zit 'troep' (bv. audio data) tussen het einde van de huidige en volgende NAL unit
//Console.WriteLine("Still {0} junk bytes after NAL unit, starting at offset {1:x8}", (nalUnitEndPosition - Position), Position);
}
//Position = nalUnitEndPosition;
}
public ByteStreamParser(INalUnitParser nalUnitParser)
{
_nalUnitParser = nalUnitParser;
}
