[linux-dvb] Re: Suggested (minor) change for channels.conf

["Jean-Claude Repetto" <jrepetto@mxmlab.com>]

Hi,

----- Original Message -----
From: "Klaus Schmidinger" <Klaus.Schmidinger@cadsoft.de>
To: <linux-dvb@linuxtv.org>
Sent: Friday, August 24, 2001 10:09 AM
Subject: [linux-dvb] Re: Suggested (minor) change for channels.conf


> Dave Chapman wrote:
> >
> > Hello,
> >
> > I know that Klaus is rightly very resistent to changes to the
channels.conf
> > file, but here is a suggestion for a backwards-compatible extension
> >
> > The documentation for VDR ("FORMATS") states that the "conditional
access"
> > field contains "0" for FTA, "1" - can be decrypted by first card, "2" -
can
> > be decrypted by the second card etc.
> >
> > If I am understanding VDR correctly, this documentation could be changed
to
> > say:
> >
> > " "0" means the channel can be received on all installed cards, "1"
means the
> > channel can only be received on the first card, "2" means the channel
can
> > only be received on the second card etc "
> >
> > This seems a more logical explanation to me.
> >
> > My suggested change would then be to extend the conditional access field
to
> > contain a comma-separated list of DVB cards that that channel can be
received
> > from.  This wouldn't break any existing channels.conf, but would give
more
> > flexibity to users with multiple cards or LNBs (including mixtures of
DVB-S,
> > DVB-C and (hopefully) DVB-T).
> >
> > I am happy to write the appropriate patch for VDR if Klaus (and others)
feel
> > that this is a useful addtion to VDR.
>
> Well, I'm thinking about something different: the Ca field should define
what
> conditional access mode this channel uses (e.g. "BetaCrypt", "Irdeto") and
> the user's setup will define what card can provide what kind of
decryption.
> Of course the individual user could extend this to define modes like
"MyMode"
> and set up his cards #1 and #3 to provide this.
>
> The advantage of this would be that a generic channels.conf would no
longer
> have a Ca of '3' for the PW channels, just because _I_ happen to have the
CAM
> in my third DVB card. There would then be a '1' (just because I will
define
> "BetaCrypt" as the first mode) as the Ca parameter of all PW channels, and
my
> individual setup will define that Ca-mode '1' is provided by card #3.
>
> That's what I plan to implement this weekend.
>
> Klaus


I think it is not totally sufficient. For example, you can have two Viaccess
CAMs, one with a TPS card, and the other with a swiss card. So it may be a
little more complex. Dave's solution is better, because you can use any CAMs
and cards.

Jean-Claude





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