From owner-cvs-all  Sun Apr  2  7:38:10 2000
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To: sobomax@altavista.net
Cc: cg@FreeBSD.ORG, cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG
Subject: Re: cvs commit: src/sys/dev/sound/isa ess.c
In-Reply-To: Your message of "Sun, 02 Apr 2000 02:50:01 +0300"
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Date: Sun, 02 Apr 2000 23:37:43 +0900
From: MIHIRA Sanpei Yoshiro <sanpei@sanpei.org>
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>I've stuck into this problem on my OPL3-SA based soundcard, where
>64KB (!!!)  buffer provided by default, while apps trying to get
>from driver much less buffer space (usually up to 1K). For example,
>all games using the SDL library was fouled thinking that buffer is
>empty (as the select() suggested so) and keeping pumping data into
>there until it completely filled those famous 64KB, which on 22KHz
>turns into 3 second delay in sound effects.
>
>I've even wrote testcase exposing this problem and ready to send it
>to anyone who want to look into this problem.

  I think so too.  Some sound application software(especially for
GAME, for example, games/xgalaga, games/rollemup in ports
collection) has this buffer problem.

  I also think, we need to add sysctl for buffer size.
---
MIHIRA Sanpei Yoshiro
Yokohama, Japan.



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