public double Speed = 0; // KB/s
public object Clone()
{
TransportState state = new TransportState();
state.PendingLength = this.PendingLength;
state.ReceivedLength = this.ReceivedLength;
state.Speed = this.Speed;
return(state);
}
public void FromLowLayerToHere(DataContent dataContent)
{
TransportState state = dataContent.TransportState;
// not receiving enough (this is receiver)
if (dataContent.Data == null)
{
// reset
if (state.PendingLength == 0)
{
_prevReceivedLength = state.ReceivedLength;
_prevTime = DateTime.Now;
_prevSpeed = 0;
return;
}
// count speed
if (DateTime.Now == _prevTime)
{
state.Speed = double.MaxValue;
}
else
{
state.Speed = (1 - alpha) * _prevSpeed + alpha * (state.ReceivedLength - _prevReceivedLength) / 1024 / (DateTime.Now - _prevTime).TotalSeconds;
}
// update
_prevSpeed = state.Speed;
_prevReceivedLength = state.ReceivedLength;
_prevTime = DateTime.Now;
// write state in dataContent
Byte[] data = Util.ObjectByteConverter.ObjectToByteArray(state);
dataContent.Data = data;
// tell peer about the transport process
NextLowLayerEvent?.Invoke((DataContent)dataContent.Clone());
}
// still sending (this is sender)
else
{
// get tranport process info from receiver
dataContent.TransportState = (TransportState)Util.ObjectByteConverter.ByteArrayToObject((byte[])dataContent.Data);
}
// tell this app
NextHighLayerEvent?.Invoke(dataContent);
}