2010-07-14 17:25, Jaroslav Kysela skrev: > On Wed, 14 Jul 2010, David Henningsson wrote: > >> 2010-07-14 13:13, Raymond Yau skrev: >> >>> localhost pulseaudio[24553]: alsa-util.c: appl_ptr : 735801008 >>> localhost pulseaudio[24553]: alsa-util.c: hw_ptr : 735846184 >>> >>> This is underrun as you can see appl_ptr is behing hw_ptr >> >> Ehm, isn't that a ring buffer? I e, there is nothing wrong with appl_ptr >> being less than hw_ptr. > > For playback, if appl_ptr is less than hw_ptr, it's underrun situation > (application didn't feed samples in time to the driver's ring buffer). > > Note that pointers in ALSA are in range 0..boundary not > 0..ring_buffer_size (boundary is near LONG_MAX value) - it's design to > detect such situations (underrun, overrun). Okay, thanks for the clarification. But LONG_MAX (as in 2^31) would still wrap around every thirteen hours (at 44100 Hz), so are we having bugs, such as e g failure to detect underruns, at those occasions? // David _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
