dev note

event flow:

_sdk.SessionInfoUpdated += SdkOnSessionInfoUpdated() { this.OnSessionInfoUpdated() }

protected virtual void OnSessionInfoUpdated() { this.SessionInfoUpdated() }

public event EventHandler<SessionInfoUpdatedEventArgs> SessionInfoUpdated;

SessionInfoUpdatedEventArgs contains actual session info in YAML format.

---
WeekendInfo:
 TrackName: southboston
 TrackID: 14
 TrackLength: 0.59 km
 SeriesID: 0
 SeasonID: 0
 SessionID: 0
 SubSessionID: 0
 Official: 0
 RaceWeek: 0
 EventType: Test
 Category: Oval
 WeekendOptions:
  NumStarters: 0
  StartingGrid: single file
  QualifyScoring: best lap
  CourseCautions: off
  StandingStart: 0
  Restarts: single file
  WindDirection: N
  WindSpeed: 3.22 km/h
  WeatherTemp: 25.56 C
  RelativeHumidity: 55 %
  Unofficial: 0
  CommercialMode: consumer
  NightMode: 0
  IsFixedSetup: 0
  StrictLapsChecking: default
  HasOpenRegistration: 0

SessionInfo:
 Sessions:
 - SessionNum: 0
   SessionLaps: unlimited
   SessionTime: unlimited
   SessionNumLapsToAvg: 0
   SessionType: Offline Testing
   ResultsPositions:
   - Position: 1
     CarIdx: 0
     Lap: 5
     Time: 18.554
     FastestLap: 5
     FastestTime: 18.554
     LastTime: 29.341
     LapsLed: 0
     LapsComplete: 14
     LapsDriven: 0.000
     Incidents: 0
     ReasonOutId: 0
     ReasonOutStr: Running
   ResultsFastestLap:
   - CarIdx: 0
     FastestLap: 5
     FastestTime: 18.554
   ResultsAverageLapTime: -1.000
   ResultsNumCautionFlags: 0
   ResultsNumCautionLaps: 0
   ResultsNumLeadChanges: 0
   ResultsLapsComplete: -1
   ResultsOfficial: 0

CameraInfo:
 Groups:
 - GroupNum: 1
   GroupName: Nose
   Cameras:
   - CameraNum: 1
     CameraName: CamNose
 - GroupNum: 2
   GroupName: Gearbox
   Cameras:
   - CameraNum: 1
     CameraName: CamGearbox
 - GroupNum: 3
   GroupName: Roll Bar
   Cameras:
   - CameraNum: 1
     CameraName: CamRoll Bar
 - GroupNum: 4
   GroupName: F Susp
   Cameras:
   - CameraNum: 1
     CameraName: CamF Susp
 - GroupNum: 5
   GroupName: R Susp
   Cameras:
   - CameraNum: 1
     CameraName: CamR Susp
 - GroupNum: 6
   GroupName: Cockpit
   Cameras:
   - CameraNum: 1
     CameraName: CamCockpit
 - GroupNum: 7
   GroupName: Scenic
   IsScenic: true
   Cameras:
   - CameraNum: 1
     CameraName: Scenic_00
   - CameraNum: 2
     CameraName: Scenic_01
   - CameraNum: 3
     CameraName: Scenic_02
   - CameraNum: 4
     CameraName: Scenic_03
   - CameraNum: 5
     CameraName: Scenic_04
   - CameraNum: 6
     CameraName: Scenic_05
 - GroupNum: 8
   GroupName: TV1
   Cameras:
   - CameraNum: 1
     CameraName: CamTV1_00
   - CameraNum: 2
     CameraName: CamTV1_01
   - CameraNum: 3
     CameraName: CamTV1_02
   - CameraNum: 4
     CameraName: CamTV1_03
 - GroupNum: 9
   GroupName: TV2
   Cameras:
   - CameraNum: 1
     CameraName: CamTV2_00
   - CameraNum: 2
     CameraName: CamTV2_01
   - CameraNum: 3
     CameraName: CamTV2_02
   - CameraNum: 4
     CameraName: CamTV2_03
 - GroupNum: 10
   GroupName: TV3
   Cameras:
   - CameraNum: 1
     CameraName: CamTV3_00
   - CameraNum: 2
     CameraName: CamTV3_01
 - GroupNum: 11
   GroupName: Pit Lane
   Cameras:
   - CameraNum: 1
     CameraName: CamPit Lane
 - GroupNum: 12
   GroupName: Pit Lane 2
   Cameras:
   - CameraNum: 1
     CameraName: CamPit Lane 2
 - GroupNum: 13
   GroupName: Chopper
   Cameras:
   - CameraNum: 1
     CameraName: CamChopper
 - GroupNum: 14
   GroupName: Blimp
   Cameras:
   - CameraNum: 1
     CameraName: CamBlimp
 - GroupNum: 15
   GroupName: Chase
   Cameras:
   - CameraNum: 1
     CameraName: CamChase
 - GroupNum: 16
   GroupName: Far Chase
   Cameras:
   - CameraNum: 1
     CameraName: CamFar Chase
 - GroupNum: 17
   GroupName: Rear Chase
   Cameras:
   - CameraNum: 1
     CameraName: CamRear Chase

DriverInfo:
 DriverCarIdx: 0
 Drivers:
 - CarIdx: 0
   UserName: David Tucker
   AbbrevName: 
   Initials: 
   UserID: 15737
   CarNumber: 64
   CarPath: jettatdi
   CarClassID: 0
   CarID: 27
   CarClassShortName: 
   CarClassRelSpeed: 0
   IRating: 0
   LicLevel: 0
   LicSubLevel: 0
   LicColor: 0xfc0706

SplitTimeInfo:
 Sectors:
 - SectorNum: 0
   SectorStartPct: 0.000
 - SectorNum: 1
   SectorStartPct: 0.500

...

Session State

enum irsdk_SessionState
{
    irsdk_StateInvalid,
    irsdk_StateGetInCar,
    irsdk_StateWarmup,
    irsdk_StateParadeLaps,
    irsdk_StateRacing,
    irsdk_StateCheckered,
    irsdk_StateCoolDown
};