[mythtv] Channel handling

[jafa]

Daniel Kristjansson wrote:
> I would recommend keeping the input stuff in there, this allows for
> easier refactoring of channel classes later on. And if at some point
> multiple inputs are added to a future rev of the hardware you won't
> have to rewrite everything (Say you want to support OTA and Cable
> with the same device without the user needing to change the wiring).
>   

Hi Daniel,

Each tuner on the box has one physical input but can demodulate 8VSB, 
64QAM, and 256QAM.

Would it be better to consider it to have three inputs or to have one 
input with three different tv modes?

Nick