[alsa-devel] [PATCH] Wrong latency in pulseaudio plugin breaks Adobe Flash Player

[Clemens Ladisch]

Philip Spencer wrote:
>     3. What should happen?
>
>            (a) The call returns immediately, since there's lots of room
>                in the buffer.
>
>            (b) The call returns after one I/O period's worth of data has
>                been drained from the buffer.

(a)

> If the correct answer is (a) (ALSA's current behaviour), then is there
> any mechanism for an app to achieve (b) -- get woken up after one I/O
> period's worth of data have been drained (other than just doing some
> infinite loop of sleeping then checking snd_pcm_avail periodically)?

Adjust avail_min (but note that wakeups happen only at period
boundaries).


Regards,
Clemens