8 Sep
2010
8 Sep
'10
10:44 p.m.
Hello,
On Wed, Sep 8, 2010 at 9:18 AM, Gabriel M. Beddingfield
<gabrbedd(a)gmail.com> wrote:
I've set alsa to wake me up every N frames. However, when I awake, I find
that I often have fewer than N frames available:
[snip]
snd_pcm_sw_params_set_avail_min (playback_handle, sw_params, N)
/* ... */
while(1) {
err = snd_pcm_wait(playback_handle, 1000);
assert(err >= 0); /* OK */
frames_to_deliver = snd_pcm_avail_update(playback_handle);
assert(frames_to_deliver >= 0); /* OK */
/* this fails about every other cycle: */
assert(frames_to_deliver >= N);
}
FYI, I compiled Paul's example code and it did the same thing.
Is this a limitation of this method? Should I switch to the "polling" API?
...or perhaps switch to clalsadrv? :-)
Thanks in advance,
Gabriel