From: Lee Revell <rlrevell@joe-job.com>
To: Steve Finney <sfinney@healthhero.com>
Cc: alsa-devel@lists.sourceforge.net
Subject: Re: /dev/dsp exclusive open?
Date: Wed, 19 Apr 2006 16:05:21 -0400 [thread overview]
Message-ID: <1145477122.31023.17.camel@mindpipe> (raw)
In-Reply-To: <F23ABFFDB8261D40A6F6D30EA0148825308F62@VS6.EXCHPROD.USA.NET>
On Wed, 2006-04-19 at 12:06 -0600, Steve Finney wrote:
> In various docs, I thought I had seen references to the fact that
> only one process should be able to open /dev/dsp (OSS). I'm running
> ALSA 1.0.10rc1
> (Linux kernel 2.6.14.3), and it appears as if it is possible to open
> /dev/dsp twice (two separate processes), but the _third_ open will
> return EBUSY. Is this a bug or a feature?
>
It depends on the hardware. If the device does hardware mixing like
emu10k1 or some VIA chips then multiple open will be possible. If the
hardware only handles a single stereo stream like most new devices then
only one process can open it.
Since your hardware supports two streams I am guessing this is a VIA
chipset?
Lee
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prev parent reply other threads:[~2006-04-19 20:05 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-19 18:06 /dev/dsp exclusive open? Steve Finney
2006-04-19 20:05 ` Lee Revell [this message]
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