Date: Wed, 3 May 2000 12:21:53 +0200 (CEST) From: Alexander Leidinger <Alexander@Leidinger.net> To: culverk@wam.umd.edu Cc: multimedia@freebsd.org, cg@freebsd.org Subject: Re: sound Message-ID: <200005031021.MAA00686@Magelan.Leidinger.net> In-Reply-To: <Pine.GSO.4.21.0004281649420.3336-100000@rac6.wam.umd.edu>
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On 28 Apr, Kenneth Wayne Culver wrote:
> Just to let someone know (I know this is -current) but some of the recent
> changes to the pcm driver have had some wierd effects. First, no wav file
> will completely play (at least not the short ones); second, xmms now takes
> 100% cpu, and in top, it says that 76% of this is being used by the
> "system"
I see 100% cpu too, but with my own mpeg player. mpg123 didn't use 100%
cpu. I think it's related to some changes in the buffer code of pcm (if
I remember correctly the commit messages).
My own player has a decode thread and a write-to-output-device thread.
The ouput thread just locks one of multiple buffers, writes the data (<=
8k) in it to /dev/dsp and unlocks the buffer.
Note: I didn't know how one has to use /dev/dsp, perhaps writting
8k is too much, but the previous versions of pcm didn't showed this
behavior.
(1) netchild@ttyp0% uname -a
FreeBSD Magelan.Leidinger.net 5.0-CURRENT FreeBSD 5.0-CURRENT #15: Mon Apr 24 18:09:05 CEST 2000 root@Magelan.Leidinger.net:/big/usr/src/sys/compile/WORK i386
The source of the world (and kernel) is at least from the same day.
(5) netchild@ttyp1% ident /usr/src/sys/dev/sound/pcm/* |grep FreeBSD
$FreeBSD: src/sys/dev/sound/pcm/ac97.c,v 1.8 2000/04/01 22:23:59 cg Exp $
$FreeBSD: src/sys/dev/sound/pcm/ac97.h,v 1.4 2000/03/20 15:30:47 cg Exp $
$FreeBSD: src/sys/dev/sound/pcm/channel.c,v 1.25 2000/04/23 18:09:17 cg Exp $
$FreeBSD: src/sys/dev/sound/pcm/channel.h,v 1.9 2000/04/23 18:09:17 cg Exp $
$FreeBSD: src/sys/dev/sound/pcm/datatypes.h,v 1.10 2000/04/15 05:04:12 cg Exp $
$FreeBSD: src/sys/dev/sound/pcm/dsp.c,v 1.19 2000/04/23 18:09:18 cg Exp $
$FreeBSD: src/sys/dev/sound/pcm/dsp.h,v 1.2 1999/09/01 06:58:22 peter Exp $
$FreeBSD: src/sys/dev/sound/pcm/fake.c,v 1.4 2000/01/29 18:48:30 peter Exp $
$FreeBSD: src/sys/dev/sound/pcm/feeder.c,v 1.9 2000/04/15 05:04:12 cg Exp $
$FreeBSD: src/sys/dev/sound/pcm/mixer.c,v 1.5 2000/03/20 15:21:49 cg Exp $
$FreeBSD: src/sys/dev/sound/pcm/mixer.h,v 1.3 2000/03/20 15:21:50 cg Exp $
$FreeBSD: src/sys/dev/sound/pcm/sound.c,v 1.19 2000/04/05 01:13:42 cg Exp $
$FreeBSD: src/sys/dev/sound/pcm/sound.h,v 1.11 2000/03/20 15:30:47 cg Exp $
I haven't tried it with a recent version (at least sound.c seems to be
at 1.21 now), but I want to update today.
Bye,
Alexander.
--
Speak softly and carry a cellular phone.
http://www.Leidinger.net Alexander+Home @ Leidinger.net
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