[MPlayer-dev-eng] ALSA issue, r29549

[Clemens Ladisch]

Reimar Döffinger wrote:
> On Tue, Sep 29, 2009 at 02:11:04PM +0200, Reimar Döffinger wrote:
> > On Tue, Sep 29, 2009 at 01:25:04PM +0200, Clemens Ladisch wrote:
> > > Apparently, ao_data.outburst being 12288 instead of 6144 bytes trips up
> > > the audio playback code.  (Unfortunately, the assumption in
> > > http://lists.mplayerhq.hu/pipermail/mplayer-dev-eng/2009-August/062150.html
> > > seems not to be entirely true.)
> > 
> > Why do you think so?

Because I thought the period size was the only difference between the
old and the new code.

However, now I've looked at the snd-ca0106 driver, and that hardware
supports no more than 8 periods.  So the old code actually uses
1024 * 8 frames and the new code 2048 * 8; both outburst and buffersize
have doubled.

> > I manually set ao_data.outburst to 24576 and still have no issue.

Were you able to reproduce the problem on your machine?

> The overall ao_data.buffersize is what causes the issue, not outburst.

That still raises the question what the upper limit on buffersize is.
I we knew that, ao_alsa could just call set_buffer_bytes_max.


Best regards,
Clemens