[mythtv] Ticket #5473: audio out, PulseAudio

[cal]

>  I've back-ported this patch to 0.21+fixess18722 (for Ubuntu Intrepid).
>  Aside from the re-factoring required to deal with using QT3 rather than
>  QT4, and the MythTV changes, I found a few issues some of which are not
>  yet resolved:

Nice effort!

[...]

on ...
>  Not yet resolved:
> 
 
>  4. Occasional "!PulseAudio Error: stream buffer underflow" reports. No
>  clues to the reason yet.
Yeah, I've seen those too, and haven't been able to raise a theory. I even
wondered if they might be benign, but that's asking a lot.
> 
>  5. Occasional bursts of static when changing to new channel (sounds like a
>  16-bit sample getting out of step by 8 bits). This will sometimes self-
>  correct (another 8 bits dropped would align the samples correctly again).
As yet I haven't tracked it further up, but I'm wondering just what sort of
audio and related commands get pumped out by the app as a session (or channel
change fires up. It's been a while since I messed with it, but I vaguely recall
traffic through WriteAudio at unexpected times, and a strange sequence of resets,
with maybe even a pause thrown in.

[...]

>  I'll attach the current patch I'm using in Ubuntu Intrepid and update as I
>  make progress with the discovered issues.
> 

good effort, nice to see someone taking it forward!

cheers, Cal