On Wed, 17 Oct 2001, Paul Davis wrote:
> snd_pcm_avail_update(): this simply updates the information on the
> number of available bytes. as you have noted, it does not block.
what is snd_pcm_set_avail_main() for, then?
>
> your code does this:
>
> if (this->stream == SND_PCM_STREAM_PLAYBACK) {
> if (poll (&pfd, 1, 1000) < 0) {
>
> which means you are not polling at all for a capture stream.
>
> ergo, your code does not block, ergo it uses close to 100% of the CPU.
>
> :)
your observations are astute :)
which brings us to the subject of the email, what is the proper way to block, or
wait, on a capture device?
I just came to a pseudo-epiphany, but I can't test it atm. Do I poll on the fd,
but set pfd.events = POLLIN | POLLERR?
Thanks for your patience :)
wingo
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