[alsa-devel] [ISSUE] rtl8192ce appears to interfere with ALSA playback

[LANGLOIS Olivier PIS -EXT]

> > As small unrelated sidenote,
> >
> > If I let aplay choose the hw params itself, how comes it ends up with 16
> periods when it calculates the period time to have 4 periods?
>
> How 4 periods come up...?
> period_time = period_size / rate.
>
>
I was referring to this code in aplay.c:set_params():

        if (period_time == 0 && period_frames == 0) {
                if (buffer_time > 0)
                        period_time = buffer_time / 4;
                else
                        period_frames = buffer_frames / 4;
        }

and I think that usually periods_num ~= buffer_time/period_time or buffer_size/period_size

aplay -Dhw:0,0 sine_48000.wav

I have:

  buffer_size  : 24000
  period_size  : 6000
  period_time  : 125000

but with the default dmix setup: aplay -v sine_48000.wav:

  buffer_size  : 16384
  period_size  : 1024
  period_time  : 21333


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