On Wed, 17 Sep 2003, Paul Davis wrote:
> >So, the application does the following: -
> >1) I want there to be 8 periods or less, with a minimum of 2.
> >2) I want the buffer to be about 500ms long or less, with a minimum or 100ms
> >3) I want the period size to have a min value of x, and a max value or y.
> >4) Now calculate the actual sizes based on all the above information.
> >(i.e. The buffer_size, and period_size values are not set until stage (4).
> >At this point, alsa-lib would use the contrains above, and calculate the
> >best values for buffer_size and period size based on the above, and also
> >what the hardware can do.
> >
> >The reason I think it might help this way, is because period_size and
> >buffer_size and number of periods are all closely linked, so we should
> >not have to set them one at a time, but set them as a group.
>
> given that buffer_size = period_size * nperiods, why try to set the
> buffer size at all? i've never set the buffer size in any ALSA app - i
> always set nperiods first, then the period size.
Good point. This algorithm sounds robust.
Jaroslav
-----
Jaroslav Kysela <[EMAIL PROTECTED]>
Linux Kernel Sound Maintainer
ALSA Project, SuSE Labs
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