Project

General

Profile

Feature #332

Handling ecm cache to speed up zapping

Added by Hotlobster - almost 14 years ago. Updated about 12 years ago.

Status:
Rejected
Priority:
Low
Assignee:
Mariusz Białończyk
Category:
Descrambling
Target version:
-
Start date:
Due date:
% Done:

0%

Estimated time:

Description

Hi

I'm wondering if there's some way to speed up encrypted channels zapping. FTA chans zapping is really fast, but encrypted channels takes around 3 sec to tune in.

Perhaps using the same scheme as vdr-sc does with ecm caching is the way to go.
After you tune to a channel for the first time, vdr-sc pulls this information for a particular SID from the datastream , and stores the ecm information for that channel in this file. For quicker channel changing information, vdr-sc then recalls this information from the ecm.cache whenever you tune back to that particular channel at a later time---which makes the channel changes much quicker in subsequent tune-ins.

code is in sc/cam.c on the VDR-SC plugin

regards.

History

#1

Updated by Andreas Smas almost 14 years ago

  • Category changed from General to Descrambling
#2

Updated by Adam Sutton about 12 years ago

  • Assignee changed from Andreas Smas to Mariusz Białończyk

Mariusz,

Can you possibly take a look at this, just give thoughts on whether its a) useful b) something that could be done etc...

Adam

#3

Updated by Mariusz Białończyk about 12 years ago

It's similar thing which i described in https://www.lonelycoder.com/redmine/issues/1278#note-6
Of course it could be done but it needs to expand our structures to hold last CAID and handle situations when CAIDs are updated.
Overall: i think that benefit from this would be insignificant.

#4

Updated by Vojtech Plavecky about 12 years ago

personally i do not see benefit of that, while oscam is holding cache, ecm request would be done in ms if oscam is running on same machine.

#5

Updated by Adam Sutton about 12 years ago

  • Status changed from New to Rejected

Closing based on Mariusz evaluation. If this really is wanted I'm sure someone else will ask.

Adam

Also available in: Atom PDF