[mythtv] MHEG-5 support for New Zealand Profile

[Steven Ellis]

David Matthews wrote:
> Steven Ellis wrote:
>   
>> On Wed, February 28, 2007 10:34 am, Steven Ellis wrote:
>>     
>>> Ok I've done done a build with key code 300 mapped to F2 which produced
>>> some additional output. You can see the details at
>>> http://www.mythtv.co.nz/mythtv/?p=34 along with the verbose output from
>>> the frontend.
>>>
>>> This resulted in a Loading message being displayed, but no additional
>>> feedback or output was present.
>>>
>>> Now it appears that they have modified the UK MHEG 1.0.6 profile
>>> slightly here for NZ. For example there are 3 new register sets (13-15)
>>> that need to be supported. Plus we need to support Maori characters.
>>>       
>> Dont a little bit more digging looking at the ASSERT messages in the logs
>> because it appears the MHEG code makes two requests that aren't currently
>> implemented in the MythTV MHEG-5 stack. I've updated the details on the
>> http://mythtv.co.nz site, but for now I think I need to have another read
>> of the UK 1.0.6 spec.
>>     
>
> I've had a look at your logs and it does appear that it is using a 
> couple of "resident programs" that aren't currently implemented.  These 
> are among the things that aren't actually used in current MHEG in the 
> UK.  Generally I didn't implement features if I couldn't test them.  It 
> should be fairly easy to implement CCR, BSI will probably require some 
> more work.  I'll see what I can do and send you a patch to try.
>
> It looks like you are not using a recent version of myth.  The ASSERTs 
> were replaced by more useful error messages in svn 12420.  It would be 
> better to upgrade to the latest svn.  That will make applying patches 
> easier.
>
> Do you have details of the input event register sets?  How do the keys 
> on the NZ remote compare with the remote shown in the UK profile?  It's 
> important to know exactly which keys are included in each set.  As a 
> first guess I'd say that 13, 14 and 15 correspond to the UK's 3, 4 and 5 
> but with different codes for the colour keys.
>
> Myth uses the FreeSans font for MHEG.  Provided the glyphs for Maori are 
> in the font and the broadcaster is sending correct UTF-8 this shouldn't 
> be a problem.
>   
Well thanks to a lot of help from David I've now been able to submit a
patch to extend the MHEG support to cover the NZ Profile - See
http://cvs.mythtv.org/trac/ticket/3162 for details.

Steve

-- 
Steven Ellis - Technical Director
OpenMedia Limited
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