[linux-dvb] Re: V4 API proposal

["Franck Arnaud" <franck@nenie.org>]

Emard:

> I would also suggest the global idea should be
> to try to optimize the api for budget-type cards only, 
> and silently discard any onbard mpeg or hardware
> demux as if we already had mpeg2 decoder and descrambler
> in open source either in the kernel or as external application.

Could it be possible to modularize the drivers into 
distinct player and source interfaces that do not 
depend on each other? Playing would be like
cat /dev/tsreceiver0/source | /dev/mpeg0/sink, I 
wonder if there is a way in Linux to do that 
with zero copy or otherwise efficiently, which 
could allow this separation even when both functions 
are implemented by the same chip(set).

Also, are there any rules followed for what goes in 
user space or kernel space? For example for the 
frontend it seems inconsistent now: diseqc is 
user space (you build diseqc command and send 
them through a generic "send diseqc command" 
API, you could have ioctls for each diseqc function 
instead) while the frontend itself is kernel space 
(you could have a single i2c device, and do every 
frontend stuff in a frontend process or libfrontend 
that writes to the i2c device). No change requested 
here, I'm just curious how people see that things 
should be kernel or user space.

--
franck@nenie.org



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