From mboxrd@z Thu Jan  1 00:00:00 1970
From: James Courtier-Dutton <James@superbug.demon.co.uk>
Subject: Re: status pointer's problem with dmix.
Date: Wed, 17 Sep 2003 20:01:36 +0100
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References: <3F68A8F9.6010605@superbug.demon.co.uk> <s5h3cevs0wn.wl@alsa2.suse.de>
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To: Takashi Iwai <tiwai@suse.de>
Cc: Alsa-devel@lists.sourceforge.net
List-Id: alsa-devel@alsa-project.org

Takashi Iwai wrote:
> At Wed, 17 Sep 2003 19:33:29 +0100,
> James Courtier-Dutton wrote:
> 
>>Output from sending stereo sound to the "dmix" device.
>>bash-2.05b# cat status
>>state: RUNNING
>>trigger_time: 1063822024.640173000
>>tstamp      : 1063822060.456968000
>>delay       : -1719463
>>avail       : 1731463
>>avail_max   : 1731463
>>-----
>>hw_ptr      : 1719463
>>appl_ptr    : 0
>>bash-2.05b#
>>
>>Output from sending stereo sound to the "front" device.
>>bash-2.05b# cat status
>>state: RUNNING
>>trigger_time: 1063823309.038609000
>>tstamp      : 1063823320.869677000
>>delay       : 14161
>>avail       : 2223
>>avail_max   : 3586
>>-----
>>hw_ptr      : 567983
>>appl_ptr    : 582144
>>
>>As you can see, the "front" device acts correctly, with all the pointers 
>>acting as they should.
>>But with "dmix", all the pointers are wrong.
>>This is particularly problematic for me, as I need a properly 
>>functioning "delay" value for my application.
>>
>>This is using alsa from 2.6test5 kernel.
> 
> 
> is it through the rate plugin?
> there was a bug about rate plugin together with dmix, which was fixed
> recently on cvs.
> 
> 
> Takashi
> 
> 
How do I tell if it is using the "rate" plugin?
I am outputing a single stereo signal at 48khz, 16 bits.
Where do I configure the rate that dmix works at natively?

Cheers
James




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