[mythtv] Adding DVB-T support to MythTV

[jng_junk at greenmail.demon.co.uk]

I've just bought a (budget) DVB-T card. I've had success using it from the
command line and now want to do more with it. I've had a look at MythTV
and like the look of it. I would like to volunteer to add DVB-T support to
MythTV, but I think I'm going to need some help to get started.

With it being a budget card you have to do all the mpeg decoding in
software, although potentially with the assist of your graphics card. I
was wondering if anybody could give me some brief pointers on the
structure of the source code to MythTV, and where I might hook in my
replacement video code. The DVB-T card effectively gives you a /dev/...  
file that you can read directly as an MPEG stream. So I'm going to have to
take this and hook it into whatever MythTV is using already.

Things I need to know are how the current video code works in MythTV and,
how the overlays work in MythTV (eg. how the EPG stuff is done on top of
the video, and how it is done semi-transparently)?

Any help would be much appreciated,

James.