Hi Pierre, Colin, Any comments? --xingchao 2011/7/22 xing wang <wangxingchao2011 at gmail.com> > > > 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 >
