2011/7/23 pl bossart <bossart.nospam at gmail.com> > > When meet Overrun or Underrun, PA will increase watermark. Due to some > > hardware limitation, the hw_ptr will not be updated in PA's request > latency. > > So there maybe some cases "faked overrun/underrun". Take capture for > > example, when Pulseaudio was waken up to read new capture data from > driver, > > and find the "available" area is much more than the record space. > Although > > it's fast enough to read out all data in short time, PA regard that as > > "overrun" and increase watermark/latency step by step, that's really > > useless. > > So attached patch used to avoid such case and only increase > > watermark/latency in real "overrun" case. > > Humm, it's not clear what problem you are trying to solve and on what > platform. Looks like a very old MRST firmware/driver? > If your driver doesn't update the hw_ptr, then how can you know if > this is a real or a fake overrun? > In fact it's a solution for such firmware hasing low hw_ptr updating rate. Pulseaudio use hw_unused field to track the unused buffer, the real overrun means the "avail" space is geting close to hwbuf_size. --xingchao > -Pierre > _______________________________________________ > pulseaudio-discuss mailing list > pulseaudio-discuss at lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.freedesktop.org/archives/pulseaudio-discuss/attachments/20110723/269b219a/attachment.html>
