protected int ReadNextPacket()
{
if (Data != null)
{
StreamingPool.Return(Data);
Data = null;
}
//wait until a magic packet is received
Device.MillisTimeout = 100;
while (true)
{
SizeBuf[0] = SizeBuf[1] = SizeBuf[2] = SizeBuf[3] = 0;
if (Device.Read(SizeBuf, 0, 4) != 4)
{
if (Token.IsCancellationRequested)
{
return(-3);
}
else
{
continue;
}
}
if (SizeBuf.SequenceEqual(MagicPacket))
{
break;
}
}
//read the payload size
if (Device.Read(SizeBuf, 0, 4) != 4)
{
return(-2);
}
var size = BitConverter.ToUInt32(SizeBuf, 0);
if (size > MaxBufSize)
{
return(-1);
}
if (size == 0)
{
return(0);
}
//read the timestamp
if (Device.Read(TsBuf, 0, 8) != 8)
{
return(-4);
}
Timestamp = BitConverter.ToUInt64(TsBuf);
if (firtTs == 0)
{
firtTs = Timestamp;
}
Timestamp -= firtTs;
//Read the actual data
Device.MillisTimeout = 1000;
Data = StreamingPool.Rent((int)size);
int actualsize = Device.Read(Data, 0, (int)size);
if (actualsize != size)
{
Console.WriteLine("Warning: Reported size doesn't match received size");
}
return(actualsize);
}
