[linux-dvb] How to descramble?

Henrik Sjoberg henke at epact.se
Fri Oct 14 13:52:16 CEST 2005


Hi all,

I have completed my fix of descrambling on streams level and I can finally
watch all my channels FTAs as well as scrambled.
If the PMT contains no CA descriptor on programme level and common CA
descriptors on stream level, the stream level common CA descriptors are
now moved to programme level. Thanks to Manu for the idea and explaining
to me how things work :).

Before I start submitting patches it would be good to test the code some
more. It would be great if people could send me parts of their ca_zap
printout so that I could test the parser and copier with more data than my
own. What I am interrested is the row(s) reading:
parse_pmt: PMT Data=[ <snip> ]

In order not to clog the list with this, please send them directly to me.

Regards,
Henrik


> On Wed, Oct 12, 2005 at 02:44:20PM +0200, Henrik Sjoberg wrote:
>
>> > The message from the userland application is wrong, due to bugs. Will
>> > need to fix that for descrambling to happen.
>> > This has been subjected to discussion many times.
>>
>> I am currently working on this code. The parsing and handling of the
>> stream descriptors are getting there, but I have not verified if the
>> ca_pmt is ok yet. I'll get back when I have.
>
> Thank you very much, Henrik and Manu, for your quick feedback and
> the good news!
>
>> ps I tried Andreas PMT data through the parser and came out better than
>> before:
>
> If there's anything I can do to help you, just tell me.
>
> --
> Andreas Trottmann
> Werft22 AG
> Tel    +41 (0)56 210 91 37
> Fax    +41 (0)56 210 91 34
> Mobile +41 (0)79 229 88 55
>
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