[mythtv] DVB-C and MythTV

Christiaan van Dijk dvbmail at xs4all.nl
Sun Aug 19 11:07:55 UTC 2007


Rudy Zijlstra wrote:
> Rudy Zijlstra wrote:
>   
>> Christiaan van Dijk wrote:
>>   
>>     
>>> Hi all,
>>>
>>> I've been working on a MythTV box with a DVB-C card and ran into some 
>>> problems. I solved quite some issues and would like to share these here.
>>>
>>> A known problem with DVB-C are the network IDs. In a normal DVB 
>>> situation there's only one main network ID in the NIT which describes 
>>> the used network. In DVB-C however the network ID needs to be entered 
>>> manually and is not even located in the NIT but in NITo. I've seen 
>>> some discussion on how to deal with this since it's not really DVB 
>>> standard and solutions are mainly dirty hacks which only pollute the 
>>> code. I tried a solution which is a bit in between (to my opinion :-) 
>>> ), this solution makes it possible to give a network ID in the 
>>> configuration script which is compiled into the code, if not defined 
>>> (default) the code stays in it's original state. There is some code 
>>> pollution with the conditional defines but I tried to keep it to a 
>>> minimum.
>>> To use a fixed network ID simply add the option --dvb-net-id=1111 to 
>>> the configuration script (for network ID 1111).
>>>
>>> There still is a bug in the standard code for handling the NITo 
>>> tables, the buffering of the different sections needs to take the 
>>> network ID into account since the NITo tables can and will include 
>>> multiple network IDs. This could be tricky since there could be up to 
>>> 64k-1 IDs in theory. The patch avoids this problem by only 
>>> interpreting the NITo/NIT with the matching network ID as main NIT.
>>>
>>> Also fixed a bug in the channel inversion setting, the scanner used to 
>>> set an invalid value for DVB-C, now it defaults to auto. Really minor 
>>> but avoids warnings in the log files.
>>>
>>>     
>>>       
>> Hi  Christiaan,
>>
>> Have you kept these current with SVN? i just tried a scan on the @home 
>> transports in order to update my channels, as they are apparently no 
>> longer up to date. And completely failed with current SVN, as it no 
>> longer sees the DVB tables. Updating them is now a real pain.
>>
>> Have not yet tried to apply to current SVN, will try that tomorrow.
>>
>> Cheers,
>>
>> Rudy
>>   
>>     
> Christiaan,
>
> tried on current SVN, and i get:
> root at satje:/home/svn/mythtv/mythtv# patch -p 2 < 
> /data/linux_install/apps/MythTV/dvb-c.diff
> patching file libs/libmythtv/channelutil.cpp
> Hunk #1 succeeded at 278 (offset 1 line).
> patching file configure
> Hunk #1 succeeded at 154 (offset 36 lines).
> Hunk #2 FAILED at 433.
> Hunk #3 FAILED at 1160.
> Hunk #4 FAILED at 2668.
> Hunk #5 FAILED at 3402.
> 4 out of 5 hunks FAILED -- saving rejects to file configure.rej
> patching file libs/libmythtv/mpeg/dvbstreamdata.cpp
> Hunk #1 succeeded at 7 with fuzz 2 (offset 1 line).
> Hunk #2 succeeded at 218 (offset 18 lines).
> Hunk #3 succeeded at 270 (offset 13 lines).
> Hunk #4 succeeded at 288 (offset 18 lines).
>
>
> As i am not exactly a coder, that pretty much blocks me...
>
> Help?
>
> Cheers,
>
> Rudy
>
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>
>
>   
Fixed the patch for SVN 14207. Tested and scanning works fine for me!
Patch added.
EIT works much better in latest SVN, no patching needed :-) .

Regds,
Christiaan.

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