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From: =?UTF-8?Q?Volker_R=c3=bcmelin?= <vr_qemu@t-online.de>
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Date: Sat, 12 Sep 2015 13:23:56 +0200
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Subject: Re: [Qemu-devel] [PATCH] pulseaudio: reduce 24s recording latency
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To: =?UTF-8?Q?Marc-Andr=c3=a9_Lureau?= <marcandre.lureau@gmail.com>
Cc: =?UTF-8?B?S8WRdsOhZ8OzLCBab2x0w6Fu?= <dirty.ice.hu@gmail.com>, QEMU <qemu-devel@nongnu.org>, Gerd Hoffmann <kraxel@redhat.com>

Hi,

Am 12.09.2015 um 01:22 schrieb Marc-Andr=C3=A9 Lureau:

>> Current code doesn't provide pulseaudio buffer attributes for
>> recording. Without buffer attributes pulseaudio uses a default
>> buffer of 4MB. 4MB is approximately 24s 16bit stereo audio
>> data at 44.1kHz.
> Why isn't the buffer processed as soon as some data is available?
>
>

On start up qemu opens a connection to pulseaudio in function=20
qpa_init_in and pulseaudio immediately starts recording to the 4MB=20
ringbuffer. The qemu guest, Windows 8.1 in my case, doesn't consume that=20
data if there is no process listening on the audio interface. Now if the=20
guest starts recording, it will see audio data which was recorded 24s ago=
.

Regards,
Volker