[mythtv] Re: mythtv-dev Digest, Vol 27, Issue 46

[Nathaniel Daw]

On Wed, 20 Apr 2005 mythtv-dev-request at mythtv.org wrote:

> It's not as trivial as you make it sound.. There are reasons most of the
> masks were chosen the way they are.. There are some networks that misuse
> the 0x46 and 0x42 tables and have them inverted.. EIT also seems to be
> barely within spec as i've seen it most of the time and its easier to
> just read whatever is being sent on that PID instead of opening up a
> pile of section filters..

Fair enough, but I am suggesting leaving the permissive mask unchanged and
just changing the masked out part of the filter ID underneath it to align
with the table you are most likely want. So for the channel tables that
would be 0x42 instead of 0x46, and for EIT that would be 0x50 instead of
0x00. For drivers that properly implement masking, this shouldn't change
anything.  If it doesn't, as on the dec-2000t, it should fall back to 
acceptable behavior, at least picking up the most important packet type. 

I agree it probably doesn't make sense to open up a whole pile of filters
for the EIT -- I'm sorry I suggested that -- but I don't see how the
narrower change would hurt anything. And it would make hardware work out
of the box that right now mythtv can't even configure.

Nathaniel