Mailing List archive
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[linux-dvb] Re: DVB-CI question
> > I'm talking about the layer below that: Each of those TPDU fragments can
> > be further re-fragmented into multiple link layer packets when they're
> > actually written to the CAM. Link layer packets can be up to 65535 bytes.
> > I suppose I could use knowledge of the fact that the higher layers will
> > never send anything more than 2048 bytes to optimise that though.
>
> I don't know that much about the CI cruft, but IMHO
> EN50221 says that link-layer fragments are of the same size
> as the pyhsical layer fragement (annex A.3.2), and the
> buffer size for the physical layer is negotiated between
> the CAM and the host (annex A.2.2.1.1, buffer size negotiation
> protocol). The av7110 implementation uses the minimum required
> buffer size of 256 bytes (or less, according to negotiation).
Yeah, we're talking about the same thing here: LPDUs. An LPDU is a fragment of
a TPDU.
However, TPDUs themselves have their own fragmentation system for some reason,
which is *different* from the LPDU fragmentation. Klaus is talking about this
TPDU fragmentation.
Lovely innit? :)
--
Info:
To unsubscribe send a mail to ecartis@linuxtv.org with "unsubscribe linux-dvb" as subject.
Home |
Main Index |
Thread Index