From mboxrd@z Thu Jan  1 00:00:00 1970
From: Clemens Ladisch <clemens@ladisch.de>
Subject: Re: how many processed frames? + various thoughts
Date: Fri, 01 Oct 2010 09:03:37 +0200
Message-ID: <4CA587C9.6040506@ladisch.de>
References: <BAY148-w10DFB4C223E0F94E5ABEB58A680@phx.gbl>
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To: John John <tobler_one@hotmail.it>
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John John wrote:
> Knowing the sample rate and the processed samples, I'm able to
> calculate the clock (what do you think about this approach?).

The sound card's clock will not be exactly synchronous with the
computer's clock.

> is there a good function into alsa API which returns the number of
> processed frames?

snd_pcm_writei() does return the number of processed frames.

snd_pcm_delay() returns the offset to the position of the sample that is
currently being played.


Regards,
Clemens