public static VarBufWithIndex FindLatestBuf(this iRSDKHeader header, int requestedTickCount)
{
VarBuf maxBuf = new VarBuf();
int maxIndex = -1;
for (var i = 0; i < header.numBuf; i++)
{
var b = header.varBuf[i];
if (b.tickCount == requestedTickCount)
{
return new VarBufWithIndex()
{
tickCount = requestedTickCount, bufOffset = b.bufOffset, index = i
}
}
;
if (b.tickCount > maxBuf.tickCount)
{
maxBuf = b;
maxIndex = i;
}
}
return(new VarBufWithIndex()
{
tickCount = maxBuf.tickCount, bufOffset = maxBuf.bufOffset, index = maxIndex
});
}
}
SessionData ReadSessionInfo(iRSDKHeader header)
{
if (header.sessionInfoUpdate == sessionLastInfoUpdate)
{
return(lastSessionInfo);
}
sessionLastInfoUpdate = header.sessionInfoUpdate;
//Trace.WriteLine("New Session data retrieved from iRacing. {0}".F(sessionLastInfoUpdate), "DEBUG");
var t = Task.Factory.StartNew(() => {
var sessionInfoData = new byte[header.sessionInfoLen];
accessor.ReadArray <byte>(header.sessionInfoOffset, sessionInfoData, 0, header.sessionInfoLen);
var sessionInfoString = System.Text.Encoding.Default.GetString(sessionInfoData);
var length = sessionInfoString.IndexOf('\0');
if (length == -1)
{
lastSessionInfo = null;
return;
}
sessionInfoString = sessionInfoString.Substring(0, sessionInfoString.IndexOf('\0'));
//Trace.WriteLine(sessionInfoString, "DEBUG");
lastSessionInfo = DeserialiseSessionInfo(sessionInfoString, header.sessionInfoUpdate);
});
if (lastSessionInfo == null)
{
t.Wait();
}
return(lastSessionInfo);
}
unsafe VarHeader[] ReadVariableHeaders(iRSDKHeader header, byte *ptr)
{
var varHeaders = new VarHeader[header.numVars];
ptr += header.varHeaderOffset;
for (var i = 0; i < header.numVars; i++)
{
varHeaders[i] = (VarHeader)Marshal.PtrToStructure(new IntPtr(ptr), typeof(VarHeader));
ptr += size;
}
return(varHeaders);
}
unsafe ITelemetry ReadVariables(iRSDKHeader header, VarHeader[] varHeaders, int requestedTickCount, bool logging)
{
var buf = header.FindLatestBuf(requestedTickCount);
if (buf.index == -1)
{
Trace.WriteLine("No data in iRacing buffers", "DEBUG");
return(null);
}
var values = ReadAllValues(accessor, buf.bufOffset, varHeaders);
var latestHeader = accessor.AcquirePointer(ptr => ReadHeader(ptr));
if (latestHeader.HasChangedSinceReading(buf))
{
Trace.WriteLineIf(logging, "Failed to read data before iRacing overwrote new sample!", "DEBUG");
return(null);
}
values.Add("TickCount", buf.tickCount);
return(values);
}
public static bool HasChangedSinceReading(this iRSDKHeader header, VarBufWithIndex buf)
{
return(header.varBuf[buf.index].tickCount != buf.tickCount);
}