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Date:      Sun, 10 Dec 1995 18:40:04 +0100 (MET)
From:      Luigi Rizzo <luigi@labinfo.iet.unipi.it>
To:        multimedia@star-gate.com, hackers@freebsd.org, frederick@parc.xerox.com
Subject:   nv and cuseeme mode
Message-ID:  <199512101740.SAA02970@labinfo.iet.unipi.it>

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I reported a few days ago problems in using the CU_SeeMe encoding
in nv 3.3.beta. Further investigation shows that there are endiannes
problems in some of the encoding/decoding routines.  I have
instrumented the encoding and decoding routines, found out that:

* if a geometry mismatch is found, the encoding routine is not invoked;
  in order to enable the PAL mode to work, I had to change slightly
  the tests at the beginning of CUSeeMe_Encode_Reconfig()

* the incoming packet type in CUSeeMe_Decode is seen as 256 instead of
  1. Swapping the bytes makes the rest of the code be called, but
  evidently there are other parts of the code where endiannes is
  important.

I would work on the code myself, but now knowing what the exact
format should be (i.e. travelling data should be little/big endian
?) I cannot be very helpful, and might even scramble the code more
than it is now.

Some help from the author is definitely necessary!

	Luigi
====================================================================
Luigi Rizzo                     Dip. di Ingegneria dell'Informazione
email: luigi@iet.unipi.it       Universita' di Pisa
tel: +39-50-568533              via Diotisalvi 2, 56126 PISA (Italy)
fax: +39-50-568522              http://www.iet.unipi.it/~luigi/
====================================================================



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