[mythtv] [Draft] Filter documentation.

[Kenneth Aafløy]

> Bruce Markey wrote:
> > A question was also raised about playback filters and hardware
> > decoders. It would be great if someone with PVR-350 TV-out
> > could try the invert filter for playback. Same for the cle266(?).
> 
> I can only speak for the cle266 at the moment:
> 
> The cle266 filters should definatly be disabled, as the hw slice
> engine uses the previous frames to decode the next. And if they
> are changed by filters, you'll probably get some very funky
> results. The filters should (if not already?) be disabled in
> MythTV for the cle266 untill someone decides to write code
> that will copy each frame to a separate buffer before doing
> filtering on it.

Just to complete my own post, yes, the filters are disabled for
viahwslice, because the frame format is set to a value, which
none of the filters supports (frame.h).

Night,
Kenneth