linux-kernel - Re: [ANNOUNCE] OSS Proxy 1.2 using CUSE

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Message-Id: <E1Lwian-0004pq-8P@pomaz-ex.szeredi.hu>
Date:	Wed, 22 Apr 2009 21:58:49 +0200
From:	Miklos Szeredi <miklos@...redi.hu>
To:	teheo@...e.de
CC:	linux-kernel@...r.kernel.org, greg@...ah.com, miklos@...redi.hu,
	tiwai@...e.de, fuse-devel@...ts.sourceforge.net
Subject: Re: [ANNOUNCE] OSS Proxy 1.2 using CUSE

On Tue, 14 Apr 2009, Tejun Heo wrote:
> OSSP 1.2 available.  It now can do mmap for both playback and
> recording.  All my quakes and dooms run and sound fine.  :-)
> 
>   http://userweb.kernel.org/~tj/ossp/

Xmms with the OSS output plugin doesn't really work.  It plays like 10
times too fast and the output is not really recognizable.

This is the debug output of osspd:

osspd: OSS Proxy v1.2 (C) 2008-2009 by Tejun Heo <teheo@...e.de>
osspd: Creating dsp (14:3), adsp (14:12), mixer (14:0)
osspd DBG0: CREATE mixer(12799)
osspd DBG0: S[1/16744] CREATE slave=16745 /store/git/ossp/ossp-padsp
osspd DBG0: S[1/16744]   client=16744 cmd=7:8 notify=9:10
ossp-padsp[mszeredi:16745] DBG0: requested frag_size (4096) is smaller than mini
mum (4412)
ossp-padsp[mszeredi:16745] DBG0: CREATE PLAY s16le 2ch 44100Hz fsz=4412:25
ossp-padsp[mszeredi:16745] DBG0:   tlen=131072:743 max=139896:793 pre=8192:46
ossp-padsp[mszeredi:16745] DBG0:   u_sd=0 u_fsz=4096:23 u_maxf=32
osspd DBG0: S[1/16744] volume set=-1/-1:-1/-1 get=63/63:0/0
ossp-padsp[mszeredi:16745] DBG0: PLAY stream underrun
ossp-padsp[mszeredi:16745] DBG0: PLAY stream underrun
ossp-padsp[mszeredi:16745] DBG0: PLAY stream underrun
ossp-padsp[mszeredi:16745] DBG0: PLAY stream underrun
ossp-padsp[mszeredi:16745] DBG0: PLAY stream underrun
ossp-padsp[mszeredi:16745] DBG0: PLAY stream underrun
[...message repeated zillion times]

I guess this has something to do with the too small frag size, but
couldn't figure out how all this works in prepare_streams() and
padsp_write().

Thanks,
Miklos
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