Annodex Demuxing
================

Now there is two annodex versions... basic difference is the newer one has annodex and anxdata
headers in the same stream, and then codecs follow on. The old one the annodex headers
are in their own stream, but the anxdata headers are the first header in each stream.

SWITCH (version)
	CASE oldversion:
		handleOldVersion()
	CASE newVersion:
		handleNewVersion()
	CASE versionXXXXXX:
		etc...
	CASE unknown:
		bitch and moan
END SWITCH

Old Version header layout
=========================
Annodex BOS Header (id = 0)
AnxData Header 1 (id = 1)  //Must be CMML
AnxData Header 2 (id = 2)
....
AnxData Header n (id = n)
Annodex EOS (id = 0)

CMML Head Tag 	 (id = 1)	
Codec BOS Header 2 (id = 2)	}
...				}	Not necessarily in this order.
Codec BOS Header n (id = n)	}
---------------
Interleaved header and data for streams 1-->n
EOS Pages for streams 1-->n



New version header layout
=========================
Annodex BOS Header (id = 0)
AnxData Header 1 (id = 0)  //Must be CMML (CHECK THIS !!)
AnxData Header 2 (id = 0)
....
AnxData Header n (id = 0)
Annodex EOS (id = 0)

CMML Head Tag (id = 1)
Codec BOS Header 2 (id=2)
...
Codec BOS Header n (id = n)
------
Interleaved header and data for streams 1-->n
EOS Pages for streams 1-->n


This implies with the new version, players that don't understand annodex can just safely ignore streams
they don't recognise (ie id=0) and after the initial block of anxdata and annodex headers the result
will be just a normal ogg file, but with a CMML stream (which can be ignored).

*** Need to check if CMML BOS must come first... if it does, this could impact some players ability to
recognise files as theora or vorbis as the media mappings will not match. (ie theora is supposed to have
the first header)


State Machine
=============

States
------

SEEN_NOTHING
SEEN_ANNODEX_BOS
SEEN_AN_ANXDATA
PROCEEDING_AS_OGG
INVALID_STATE

Transitions
-----------

t(currentState, condition, newState)
------------------------------------
t(SEEN_NOTHING, annodex BOS arrives, SEEN_ANNODEX_BOS)
t(SEEN_NOTHING, !(annodex BOS arrives), INVALID_STATE)
t(SEEN_ANNODEX_BOS, anxdata arrives, SEEN_AN_ANXDATA)
t(SEEN_ANNODEX_BOS, !(anxdata arrives), INVALID_STATE)
t(SEEN_AN_ANXDATA, anxdata arrives, SEEN_AN_ANXDATA)
t(SEEN_AN_ANXDATA, annodex EOS arrives, PROCEEDING_AS_OGG)
t(SEEN_AN_ANXDATA, !(anxdata arrives || annodex EOS arrives), INVALID_STATE)

Then proceed as ogg if state is PROCEEDING_AS_OGG otherwise FAIL.