At Fri, 29 Feb 2008 17:56:43 -0600, Timur Tabi wrote: > > I'm stress-testing my sound driver using mplayer to see how it handles underrun > during jumps in CPU loads. That is, I start playing a movie, and then I cause > the CPU to jump to 100%, and then I drop the CPU back to normal. During the > times when the CPU is at 100%, I get underruns and other problems. That's normal. > > When I tell mplayer to use the ALSA API, my driver recovers nicely from an > underrun situation when the CPU load drops back to normal. However, if I tell > mplayer to use the OSS API (i.e. ALSA's OSS emulation), it does not recover from > an underrun situation. The audio and video playback remains distorted. I need > to tell mplayer to pause and resume to get it to recover. > > Is this normal for ALSA drivers? Before I try to debug this problem the hard > way, I want to know if this could be the result of a common programming mistake > in my driver or something like similar. No, it's not normal. The question is whether OSS emulation really notices the underrun. More likely, it's caused by the difference of parameters. Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
