[mythtv] More nforce questions

[DMW]

From: "Drew Bernat" <abernat at zathras.net>
>
> I just tried that (setting AudioOutputDevice to plughw:0,1) and it doesn't
> help. The audio is playing right pitch-wise (no chipmunking) but the
> playback is still very choppy, and I get the same errors on the console.

I played with the S/PDIF output and had the same problems. I used aplay as a
guide to fix these problems and was able to make some progress. One problem
seems to be that AddSamples doesn't handle the case where snd_pcm_mmap_write
doesn't write all the data given. Adding in a while loop around this made
the choppy playback much better for me, but never truly fixed it. It is
reasonably obvious how to make this change by looking at aplay.

Unfortunately I have absolutely no ALSA experience outside of the playing
around I did above, so how to properly fix this is a problem I haven't
solved (yet).

- Dave