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From: Luigi Rizzo <luigi@labinfo.iet.unipi.it>
Message-Id: <199707240508.HAA25745@labinfo.iet.unipi.it>
Subject: Re: dma handling in the sound driver
To: rhh@ct.picker.com (Randall Hopper)
Date: Thu, 24 Jul 1997 07:08:53 +0200 (MET DST)
Cc: freebsd-multimedia@FreeBSD.ORG
In-Reply-To: <19970723232432.47587@ct.picker.com> from "Randall Hopper" at Jul 23, 97 11:24:13 pm
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> Luigi Rizzo:
>  |Knowing which ioctl's are used by apps (commercial and not) would
>  |certainly help to prioritize the work on some rather than others. 
> 
> Ok.  Well, the only commercial app I have this info for is the MpegTV's
> Linux mtv, since I buzzed it out when debugging the no-audio problem
> (before dumping it for the FreeBSD version).  Here's the /dev/dsp ioctls it
> uses:

Thanks for the detailed list.

I am looking at the DSP_SETFRAGMENT thing, and while I have no problem
to implement it with the required features, it sounds quite odd that
the application requires many small buffers. If they are small it means
the app wants low latency, so why ask for many ?

	Luigi