[linux-dvb] [PATCH] (Try 2) Convert GP8PSK module to use S2API
alannisota at gmail.com
Tue Dec 16 18:59:04 CET 2008
Janne, Thanks for your' response. Hopefuly this patch addresses all of
I am not including the API changes at the moment. I'll try again on
that after this gets committed (the number of folks working with DCII is
very small, as far as I'm aware, so the other modulation types can be
There were a fewquestions which I'll try to answer here as well:
> Do the values for the FEC in cmd depend on the
Yes, each modulation can have completely different meanings for cmd
> I would prefer a S2API command DTV_TURBO_MODES over duplicating
> modulations. Especially since the the implemtation in the driver differs
> only for QPSK and QPSK_TURBO.
The downside to this is that it requires more changes inside of the
user-space software to do something special with these modulations.
They really are completely different than non-turbo modes. But as the
only interesting case is Turbo-QPSK, and I'm not sure which satellites
even broadcast it, that may be ok.
>> + QPSK_DCII_C,
>> + QPSK_DCII_I,
>> + QPSK_DCII_Q,
> Are all three needed? What does the last character mean?
I'm not an expert in DCII, and don't know much about it. This set of
code came directly from the vendor. Here is the best description of
DCII that I've seen though:
This patch converts the gp8psk module to use the S2API.
It pretends to be DVB-S2 capable in order to allow the various
supported modulations (8PSK, QPSK-Turbo, etc), and keep software
compatibility with the S2API patches for Mythtv and VDR.
Signed-off by: Alan Nisota <alannisota at gmail.com>
-------------- next part --------------
A non-text attachment was scrubbed...
Size: 6487 bytes
Desc: not available
Url : http://www.linuxtv.org/pipermail/linux-dvb/attachments/20081216/12fc52ba/attachment.patch
More information about the linux-dvb