On Sun, 9 Dec 2001, Abramo Bagnara wrote:
> Jaroslav Kysela wrote:
> >
> > On Sat, 8 Dec 2001, Tim Goetze wrote:
> >
> > > the doc to snd_pcm_mmap_commit says
> > >
> > > * \return 0 on success otherwise a negative error code
> > >
> > > but on success it rather seems to return >= 0 (the number of frames
> > > commited i think).
> > >
> > > please clarify and fix.
> >
> > Yes, it's definitely wrong. The return value should be zero or an error.
> > The description is fine, but the implementation fails. I'm working on it.
>
> I'm not so sure that documentation was right and implementation wrong.
>
> What are the reasons of this choice vs. the opposite one?
>
> Are you sure that for each PCM type is always possible to commit *all*
> frames or none? What happens if after a first partial transfer we get an
> xrun?
We return an error and appl_ptr will be increased with amount of
successfully written frames, so we can use this value later for
recovery. I think that we should add a new function called (for example)
snd_pcm_mmap_commit_partial which will take care about partial
transfers as well to allow good recovery.
Jaroslav
-----
Jaroslav Kysela <[EMAIL PROTECTED]>
SuSE Linux http://www.suse.com
ALSA Project http://www.alsa-project.org
_______________________________________________
Alsa-devel mailing list
[EMAIL PROTECTED]
https://lists.sourceforge.net/lists/listinfo/alsa-devel
