From mboxrd@z Thu Jan  1 00:00:00 1970
From: Clemens Ladisch <clemens@ladisch.de>
Subject: Re: S24_LE is 3 bytes ? in alsa-lib example pcm.c
Date: Thu, 10 Jul 2008 11:23:10 +0200
Message-ID: <4875D4FE.3000607@ladisch.de>
References: <4875C730.7080003@aimvalley.nl>
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To: Norbert van Bolhuis <nvbolhuis@aimvalley.nl>
Cc: alsa-user@lists.sourceforge.net, alsa-devel@alsa-project.org
List-Id: alsa-devel@alsa-project.org

Norbert van Bolhuis wrote:
> as far as I know:
> sample format S24_LE is 24bit sample in 4 bytes
> sample format S24_3LE is 24bit sample in 3 bytes
> (why else have separate definitions), right ?

Yes.

> In the ALSA-LIb example /test/pcm.c however
> (http://www.alsa-project.org/alsa-doc/alsa-lib/_2test_2pcm_8c-example.html)
> there is no diff between the 2 sample formats.

That example program uses snd_pcm_format_width() although it should
have used snd_pcm_format_physical_width() when calculating memory
buffer sizes.


Regards,
Clemens