[alsa-devel] Is snd_pcm_hw_params_set_period_time_near the same as sampling period?
Guilherme Longo
grlongo.ireland at gmail.com
Thu Jul 23 17:24:32 CEST 2009
Hi mates.
I am trying to understand a piece of a code I am studing .
What does exactly the functions snd_pcm_hw_params_set_period_time_near
sets?
In my understand period time should be the time between 2 consecutive
samples, but the following code does not appears to be calculating that.
buffer_time = 500000 // What I believe that means 0.5s as US is the
unit used.
if (period_time == 0 && period_frames == 0) {
if (buffer_time > 0)
period_time = buffer_time / 4;
else
period_frames = buffer_frames / 4;
}
Is this period time the same as period describled in here:
http://www.fon.hum.uva.nl/praat/manual/sampling_period.html
Thanks!
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