[mythtv-users] Advice needed on adding a hard coded Audio PID to mpegstreamdata.cpp

[foo bar]

2008/9/22 Another Sillyname <anothersname at googlemail.com>

> Hi All
>
> I'm trying to hard code an Audio PID to the CNN feed on Astra 28E but
> am somewhat stuck so a little help is needed please.
>
> CNN on Astra 28E uses 2319 for it's VPID and usually it would use 2320
> for it's APID, however it is actually using 2320 for text and  2321
> for it's APID.
>
> By looking at the code and a patch required for ITV HD I've worked out
> that something like.....
>
> if (pmt.StreamPID(i) == 2319 && type == StreamID::PrivData)
>       StreamID::IsAudio(type) == 2321;
>
> Added to /mythtv/libs/libmythtv/mpeg/mpegstreamdata.cpp near line 556
> (or perhaps somewhere else more appropriate) would do the job, however
> I don't understand the data naming structure, I can't write code for
> toffee and I don't want my system to burst into flames because I did
> it wrong!!
>
> If someone could give me some pointers I would be very grateful.


The ITV HD patch is necessary because they intentionally misdescribe the
vpid.
The code should handle the situation you describe as-is. However, if the
apid
is misdescribed as PrivData (which seems unlikely) then you'd want something
like:

if (pmt.StreamPID(i) == 2321 && type == StreamID::PrivData)
    type = StreamID::MPEG2Audio;
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