[mythtv] Not decoding enough audio data?

[Ed W]

Hi, I have seen stutters with audio for some years now and only now had 
some time to debug it a little.  In general it occurs during blank 
frames on DVB-T streams (UK).  However, I'm also seeing it occasionally 
in other situations now.

Having instrumented the audio layer, the problem actually seems to be 
the audio ringbuffer running dry and no samples left to feed the 
soundcard.  Now, I poked around a little trying to figure out the 
feedback loop which is controlling how much audio data is being decoded 
at any time, but confess I can't see how this is happening?

Can someone please give me a brief heads up on which parts of the code 
to look at more closely so I can debug this on my setup please?

Thanks

Ed W