ACC memory-mapped file Race telemetry

[paoloambrosio]

Implement telemetry for ACC with what provided by memory-mapped files. Relates to #49 and #50.

• [ ] Read MM telemetry
  • [x] Error if Major version doesn't match
  • [x] Handle absence of MM files
  • [x] Handle reading from 3 files independently
  • [ ] Cool off period before trying to open the file again (e.g. from 15ms to 1s poll time - simulated by skipping reads)
• [ ] Use the current MM data to create telemetry (what fields?)
• [ ] Gaming modes
  • [ ] Menu
  • [ ] Race (SP, MP driving, MP connected)
• [ ] Update documentation

[paoloambrosio]

Edit: this would have been really difficult with the Dataflow API, so we implemented #28 first. The following is not relevant anymore.

To implement UDP reading we would require...

1. UDP connection block (IPropagatorBlock<byte[], byte[]>)
   • connects to UDP
   • incoming socket messages are sent to source
   • target sends messages to socket
   • terminates when connection terminates
2. ACC UDP connection block
   • ACC UDP out message =transform=> byte[] => UDP connection block
   • UDP connection block => byte[] =transform=> ACC UDP out message
3. Restarting source
   • timer tick
   • if source can be created (i.e. connection can be established)
     • stop this timer (timer.Change(Timeout.Infinite, Timeout.Infinite))
     • link source to output
     • listen to source termination, unlink it (?) and restart timer
   • else wait for the next timer

[paoloambrosio]

Telemetry file not present in main menu. Otherwise...

graphicData.Status	when
0	recorded replay (when everything is 0)
1	race replay (with session data)
2	in game menus with staticData.AidMechanicalDamage as -1.0
3	in single player paused menu