CriticSec Refactor [PART 1] Remove InitSubPicQueue and m_csReceive.
CriticSec Refactor [PART 2] Do NOT start file reloader thread until every thing has been initiated
CriticSec Refactor [PART 3] properly protect CSubtitleInputPin member
CriticSec Refactor [PART 4] properly protect XySubFilter members
CriticSec Refactor [PART 5] One critical section for all
Normally we should connect before using its methods, but on the other hand, we want to properly prepare ourself before the connect
Report TV.601 if the subtitle is neither text based nor HDMV.