[mythtv] DVB EIT Implementation

[Rudy Zijlstra]

Stuart Auchterlonie wrote:

>On Wed, Oct 12, 2005 at 06:28:47AM -0400, Daniel Kristjansson wrote:
>  
>
>>On Wed, 2005-10-12 at 10:18 +0100, Stuart Auchterlonie wrote:
>>    
>>
>>>On Wed, Oct 12, 2005 at 09:57:52AM +0100, John Pullan wrote:
>>>      
>>>
>>>Something I noticed while looking at the memory leaks is the
>>>Events map contains events for EVERY channel available, but
>>>GetEmitID only ever picks events from the channels on the
>>>current mplex.
>>>      
>>>
>>It should only contain the events for that transport,
>>and emit them when they are known to be complete.
>>    
>>
>
>Ahh, this is where various situations are different.
>
>UK DVB-T transmits EIT info for all mplexes on all mplexes.
>Aus DVB-T transmits EIT info for 1 mplex on that mplex.
>  (plus the info isn't very good apparently...)
>DVB-S is sometimes like both of these and sometimes has a single
>channel carrying EIT info.
>
>No idea about ATSC.
>
>  
>

>The way it works now is based on the assumption you outlined above,
>that this mplex only has data for this mplex.
>
>  
>
And this assumption fails in many places. DVB-S (Astra) tries to have 1 
mplex with all EIT, does not manage this because of contractual issues 
and so ends up with: 1 mplex with a lot ot EIT, and several mplexes 
covering multiple other mplexes....

DVB-C has many situations where the assumption of mplex has data for 
mplex only fails.

Rudy