Re: IO plugin and multiple poll descriptors

[Marcel Holtmann <marcel@holtmann.org>]

Hi Takashi,

> > for the IO plugin we can specify one descriptor for poll().
> > 
> > 	io.poll_fd = fd;
> > 	io.poll_events = POLLIN;
> > 
> > I like to use more than one, because in the Bluetooth cases I always
> > have to deal with a signal and a separate media channel. Is it possible
> > to add support for that or do I must work around it.
> 
> Currently, the alsa-lib handles only one poll_fd internally although
> API allows the multiple poll_fds.  So, it's not quite easy to add the
> multiple fds...

are there any plans to change this in the future?

Maybe it is a good idea to retrieve the poll_fd through a callback. I
think of something like you already do in the library:

	poll_descriptors(snd_pcm_ioplug_t *io, struct pollfd *pfds)
	poll_descriptors_count(snd_pcm_ioplug_t *io)

Or do you have a good idea on how to workaround it?

Regards

Marcel




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