Handling ecm cache to speed up zapping
|Assignee:||Mariusz Białończyk||% Done:|
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
#3 Updated by Mariusz Białończyk 6 months 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.