From: Jaroslav Kysela <perex@perex.cz>
To: alsa-devel@alsa-project.org
Cc: Petr Kulhavy <petr@barix.com>
Subject: Re: AES/SPDIF channel status bits in ALSA
Date: Thu, 08 Jan 2015 14:27:10 +0100 [thread overview]
Message-ID: <54AE85AE.2030206@perex.cz> (raw)
In-Reply-To: <54AE82A2.7070100@barix.com>
Dne 8.1.2015 v 14:14 Petr Kulhavy napsal(a):
> Hi,
>
> is there a way to get the channel status bits information from an AES or
> SPDIF input interface through ALSA and read it in userspace?
> I'm trying to solve some issues with the channel status bits sent from a
> custom hardware and finding a way to analyse the channel status info.
Look for the IEC958 controls (amixer -c <cardnumber> contents), but most
hardware / drivers do not pass this information.
Some hardware is also able to receive the whole spdif frames - look for
drivers with SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_* types (like cmipci).
Jaroslav
--
Jaroslav Kysela <perex@perex.cz>
Linux Kernel Sound Maintainer
ALSA Project; Red Hat, Inc.
prev parent reply other threads:[~2015-01-08 13:27 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-08 13:14 AES/SPDIF channel status bits in ALSA Petr Kulhavy
2015-01-08 13:27 ` Jaroslav Kysela [this message]
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