Re: [Qemu-devel] [PATCH] pulseaudio: reduce 24s recording latency

[Volker Rümelin]

Hi,

Am 12.09.2015 um 01:22 schrieb Marc-André 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 
qpa_init_in and pulseaudio immediately starts recording to the 4MB 
ringbuffer. The qemu guest, Windows 8.1 in my case, doesn't consume that 
data if there is no process listening on the audio interface. Now if the 
guest starts recording, it will see audio data which was recorded 24s ago.

Regards,
Volker