From: Clemens Ladisch <clemens@ladisch.de>
To: Sedji Gaouaou <sedji.gaouaou@atmel.com>
Cc: alsa-devel@alsa-project.org
Subject: Re: Recording problem with ALSA: trying to set up some constraints
Date: Thu, 22 May 2008 13:03:33 +0200 [thread overview]
Message-ID: <48355305.1090808@ladisch.de> (raw)
In-Reply-To: <48353DEE.1020502@atmel.com>
Sedji Gaouaou wrote:
> I have a problem with my recording driver.
> I have set up a pcm_hardware structure in which I define the format
> supported by my hardware:
> ...
> .formats = (SNDRV_PCM_FMTBIT_S16_LE
> | SNDRV_PCM_FMTBIT_S16_BE
> | SNDRV_PCM_FMTBIT_S20_3LE
> ...
>
> Then in my open function I pass it to the runtime struct.
>
> Nevertheless if I try to run arecord with this option: arecord -d 1
> test.wav, I will have a kernel oops.
> The default format is U8, but it is not supported by my Hardware, abd it
> is not defined in my structure, so I though that it should exit arecord
> but not crash.
The default device will do automatic sample format conversion, i.e.,
your driver will see a request for S16_LE.
This looks like a bug somewhere else in your driver.
Regards,
Clemens
next prev parent reply other threads:[~2008-05-22 11:03 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-22 9:33 Recording problem with ALSA: trying to set up some constraints Sedji Gaouaou
2008-05-22 11:03 ` Clemens Ladisch [this message]
2008-05-23 14:27 ` Sedji Gaouaou
2008-05-23 15:42 ` USB Data Dropping Charles Eidsness
2008-05-26 18:45 ` Charles Eidsness
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