private bool ParseLongLengthPrefixedNalUnit(IH264Reader reader, IResultNodeState resultState)
{
uint nalUnitLength = reader.GetUInt(NalUnitParser.Attribute.NalUnitLength);
long nalUnitEndPosition = (reader.Position + nalUnitLength);
if (nalUnitEndPosition > reader.Length)
{
return(false);
}
//Parse remainder with specific nalunitparser (NOTE: Is not a sub-object)
reader.ParseOneNalUnit(_nalUnitParser, resultState, nalUnitEndPosition);
return(reader.Position == nalUnitEndPosition);
}
public void Parse(IH264Reader reader, IResultNodeState resultState)
{
if (reader.Position == reader.Length)
{
resultState.Invalidate();
return;
}
long nalUnitEndPosition;
// Remove 'zero byte' and 'start code prefix' for the 'byte stream' format
if (reader.PeekUInt() == 0x00000001)
{
// TODO: hoort eigenlijk bij de StartCodePrefix - zie pg. 305 van ITU-T H.264 (03/2010)
reader.GetFixedByte(0x00, NalUnitParser.Attribute.ZeroByte);
}
reader.GetFixedThreeBytes(0x000001, NalUnitParser.Attribute.StartCodePrefix);
var windowStart = reader.Position;
if (reader.NextNalUnit()) //Forward till after next nalunit startcode
{
nalUnitEndPosition = reader.Position; //Position of next nalunit start
}
else
{
nalUnitEndPosition = reader.Length;
}
reader.Position = windowStart; //rewind
if (!resultState.Valid)
{
return;
}
//Parse remainder with specific nalunitparser (NOTE: Is not a sub-object)
reader.ParseOneNalUnit(_nalUnitParser, resultState, nalUnitEndPosition);
}