From: Gerd Hoffmann <kraxel@redhat.com>
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [RESEND PATCH 2/3] pulseaudio: setup buffer attrs
Date: Tue, 25 Jan 2011 12:05:43 +0100 [thread overview]
Message-ID: <4D3EAE87.7040908@redhat.com> (raw)
In-Reply-To: <20110125092020.GB5940@playa.tlv.redhat.com>
Hi,
> What's the default buffer size?
Don't know the exact number, but pulse's default buffer size is quite
big by design. Which is fine for most apps (such as mp3 players) where
loading more sound data into the buffer every second or so is ok. It
doesn't work very well for sound card emulation though. And it doesn't
work at all if your guest happens to use a ring buffer which holds sound
data for only 20ms.
> Is there any reason to query this on startup
> somewhere instead of hard coding it?
No. The pulse default values will never ever work for qemu's low
latency requirements.
cheers,
Gerd
next prev parent reply other threads:[~2011-01-25 11:05 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-24 21:07 [Qemu-devel] [RESEND PATCH 1/3] pulseaudio: process 1/4 buffer max at once Gerd Hoffmann
2011-01-24 21:07 ` [Qemu-devel] [RESEND PATCH 2/3] pulseaudio: setup buffer attrs Gerd Hoffmann
2011-01-25 9:20 ` Alon Levy
2011-01-25 11:05 ` Gerd Hoffmann [this message]
2011-01-24 21:07 ` [Qemu-devel] [RESEND PATCH 3/3] pulseaudio: tweak config Gerd Hoffmann
2011-01-25 16:57 ` [Qemu-devel] Re: [RESEND PATCH 1/3] pulseaudio: process 1/4 buffer max at once malc
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