private int readRawData(byte[] rawData)
{
// unpack the packet header manually before attempting to load into a struct
uint packetNumber = BitConverter.ToUInt32(rawData, 0);
uint categoryPacketNumber = BitConverter.ToUInt32(rawData, 4);
int partialPacketIndexBytes = rawData[8];
int partialPacketNumber = rawData[9];
EUDPStreamerPacketHandlerType packetType = (EUDPStreamerPacketHandlerType)rawData[10];
int packetVersion = rawData[11];
int frameLength = 0;
switch (packetType)
{
case EUDPStreamerPacketHandlerType.eCarPhysics:
telemPacketCount++;
if (telemPacketCount > packetCountAtStartOfNextRateCheck)
{
lastPacketRateEstimate = (int)((float)TimeSpan.TicksPerSecond * (float)(telemPacketCount - packetCountAtStartOfCurrentRateCheck) / (float)(DateTime.UtcNow.Ticks - ticksAtStartOfCurrentPacketRateCheck));
Console.WriteLine("Packet rate = " + lastPacketRateEstimate +
"Hz, totals:" +
"\rtelem = " + telemPacketCount +
"\rraceDefinition = " + raceDefinitionPacketCount +
"\rparticipants = " + participantsPacketCount +
"\rtimings = " + timingsPacketCount +
"\rgameState = " + gameStatePacketCount +
"\rweather = " + weatherStatePacketCount +
"\rvehicleNames = " + vehicleNamesPacketCount +
"\rtimeStats = " + timeStatsPacketCount +
"\rparticipantVehicleNames = " + participantVehicleNamesPacketCount +
"\rin sequence = " + inSequenceTelemCount + " oos accepted = " + acceptedOutOfSequenceTelemCount + " oos rejected = " + discardedTelemCount);
packetCountAtStartOfCurrentRateCheck = telemPacketCount;
packetCountAtStartOfNextRateCheck = packetCountAtStartOfCurrentRateCheck + packetRateCheckInterval;
ticksAtStartOfCurrentPacketRateCheck = DateTime.UtcNow.Ticks;
}
frameLength = UDPPacketSizes.telemetryPacketSize;
Boolean sequenceCheckOK = isNextInSequence(packetNumber);
if (sequenceCheckOK)
{
inSequenceTelemCount++;
}
if (strictPacketOrdering && !sequenceCheckOK)
{
discardedTelemCount++;
}
else
{
GCHandle telemHandle = GCHandle.Alloc(rawData.Take(frameLength).ToArray(), GCHandleType.Pinned);
try
{
sTelemetryData telem = (sTelemetryData)Marshal.PtrToStructure(telemHandle.AddrOfPinnedObject(), typeof(sTelemetryData));
if (sequenceCheckOK || !telemIsOutOfSequence(telem))
{
buttonsState = ConvertBytesToBoolArray(telem.sDPad, telem.sJoyPad1, telem.sJoyPad2);
lastSequenceNumberForTelemPacket = (int)packetNumber;
workingGameState = StructHelper.MergeWithExistingState(workingGameState, telem);
newSpotterData = true;
}
}
finally
{
telemHandle.Free();
}
}
break;
case EUDPStreamerPacketHandlerType.eRaceDefinition:
raceDefinitionPacketCount++;
frameLength = UDPPacketSizes.raceDataPacketSize;
GCHandle raceDefHandle = GCHandle.Alloc(rawData.Take(frameLength).ToArray(), GCHandleType.Pinned);
try
{
sRaceData raceDefinition = (sRaceData)Marshal.PtrToStructure(raceDefHandle.AddrOfPinnedObject(), typeof(sRaceData));
workingGameState = StructHelper.MergeWithExistingState(workingGameState, raceDefinition);
}
finally
{
raceDefHandle.Free();
}
break;
case EUDPStreamerPacketHandlerType.eParticipants:
participantsPacketCount++;
frameLength = UDPPacketSizes.participantsDataPacketSize;
GCHandle participantsHandle = GCHandle.Alloc(rawData.Take(frameLength).ToArray(), GCHandleType.Pinned);
try
{
sParticipantsData participants = (sParticipantsData)Marshal.PtrToStructure(participantsHandle.AddrOfPinnedObject(), typeof(sParticipantsData));
workingGameState = StructHelper.MergeWithExistingState(workingGameState, participants);
}
finally
{
participantsHandle.Free();
}
break;
case EUDPStreamerPacketHandlerType.eTimings:
timingsPacketCount++;
frameLength = UDPPacketSizes.timingsDataPacketSize;
GCHandle timingsHandle = GCHandle.Alloc(rawData.Take(frameLength).ToArray(), GCHandleType.Pinned);
try
{
sTimingsData timings = (sTimingsData)Marshal.PtrToStructure(timingsHandle.AddrOfPinnedObject(), typeof(sTimingsData));
workingGameState = StructHelper.MergeWithExistingState(workingGameState, timings);
}
finally
{
timingsHandle.Free();
}
break;
case EUDPStreamerPacketHandlerType.eGameState:
gameStatePacketCount++;
frameLength = UDPPacketSizes.gameStateDataPacketSize;
GCHandle gameStateHandle = GCHandle.Alloc(rawData.Take(frameLength).ToArray(), GCHandleType.Pinned);
try
{
sGameStateData gameState = (sGameStateData)Marshal.PtrToStructure(gameStateHandle.AddrOfPinnedObject(), typeof(sGameStateData));
workingGameState = StructHelper.MergeWithExistingState(workingGameState, gameState);
}
finally
{
gameStateHandle.Free();
}
break;
case EUDPStreamerPacketHandlerType.eWeatherState:
weatherStatePacketCount++;
Console.WriteLine("Got an undocumented and unsupported weather packet");
break;
case EUDPStreamerPacketHandlerType.eVehicleNames:
weatherStatePacketCount++;
Console.WriteLine("Got an undocumented and unsupported vehicle names packet");
break;
case EUDPStreamerPacketHandlerType.eTimeStats:
participantsPacketCount++;
frameLength = UDPPacketSizes.timeStatsPacketSize;
GCHandle timeStatsHandle = GCHandle.Alloc(rawData.Take(frameLength).ToArray(), GCHandleType.Pinned);
try
{
sTimeStatsData timeStatsData = (sTimeStatsData)Marshal.PtrToStructure(timeStatsHandle.AddrOfPinnedObject(), typeof(sTimeStatsData));
workingGameState = StructHelper.MergeWithExistingState(workingGameState, timeStatsData);
}
finally
{
timeStatsHandle.Free();
}
break;
case EUDPStreamerPacketHandlerType.eParticipantVehicleNames:
participantsPacketCount++;
frameLength = UDPPacketSizes.participantVehicleNamesPacketSize;
GCHandle vehNamesHandle = GCHandle.Alloc(rawData.Take(frameLength).ToArray(), GCHandleType.Pinned);
try
{
sParticipantVehicleNamesData participantVehicleNames = (sParticipantVehicleNamesData)Marshal.PtrToStructure(vehNamesHandle.AddrOfPinnedObject(), typeof(sParticipantVehicleNamesData));
workingGameState = StructHelper.MergeWithExistingState(workingGameState, participantVehicleNames);
}
finally
{
vehNamesHandle.Free();
}
break;
}
return(frameLength);
}
public static pCars2APIStruct MergeWithExistingState(pCars2APIStruct existingState, sRaceData raceData)
{
Boolean isTimedSession = (raceData.sLapsTimeInEvent >> 15) == 1;
int sessionLength = raceData.sLapsTimeInEvent / 2; // need the bottom bits of this short here - is it valid to just halve it?
if (isTimedSession)
{
existingState.mLapsInEvent = (uint)sessionLength;
existingState.mSessionLengthTimeFromGame = 0;
}
else
{
existingState.mSessionLengthTimeFromGame = 300 * (uint)sessionLength; // *300 because this is in 5 minutes blocks
existingState.mLapsInEvent = 0;
}
existingState.mTrackLength = raceData.sTrackLength;
existingState.mWorldFastestLapTime = raceData.sWorldFastestLapTime;
existingState.mWorldFastestSector1Time = raceData.sWorldFastestSector1Time;
existingState.mWorldFastestSector2Time = raceData.sWorldFastestSector2Time;
existingState.mWorldFastestSector3Time = raceData.sWorldFastestSector3Time;
existingState.mPersonalFastestLapTime = raceData.sPersonalFastestLapTime;
existingState.mPersonalFastestSector1Time = raceData.sPersonalFastestSector1Time;
existingState.mPersonalFastestSector2Time = raceData.sPersonalFastestSector2Time;
existingState.mPersonalFastestSector3Time = raceData.sPersonalFastestSector3Time;
existingState.mTrackLocation = raceData.sTrackLocation;
existingState.mTrackVariation = raceData.sTrackVariation;
existingState.mTranslatedTrackLocation = raceData.sTranslatedTrackLocation;
existingState.mTranslatedTrackVariation = raceData.sTranslatedTrackVariation;
existingState.mEnforcedPitStopLap = raceData.sEnforcedPitStopLap;
return(existingState);
}
