Kurt Kartaltepe bc9eee922e libobs: Fix pulseaudio monitoring, once and for all
This makes multiple changes to resolve issues with monitoring. We have
added a number of things over time to resolve various issues due to our
misunderstanding of the pulse api and the explicitly wrong pulse api
documentation.

First is removing the prior stream write tracking. Write tracking
was incorrect as pulse sends you the total number of bytes it wants
written at that time and not a incremental, but also this write tracking
is unhelpful since we can just let begin_write signal when we should
stop writing.

Second removing underflow tracking, this sort of worked to detect high
latency sources like vlc which buffer ~1s of data before writing audio
data. It worked because it would grow the buffer in PA until we could
write enough data into it, but it didn't allow us to leverage that
larger buffer because we never paused the PA stream.

To solve the buffering/high latency issue instead start the PA stream
corked and only uncork it once we have enough data to reach the targeted
latency. We also check how much data we recieve from the source and if
it appears to be high latency providing us with much more data than our
target latency we increase the latency to match the source. Fixing the
VLC source issue and resulting in a smooth start to audio instead of
underruns while we play and increase latency.

Finally add some handling for pulses incorrectly documented API. Notably
that begin_write may request more or less data from you so handle both
cases. And stop attempting to use attr.maxlength which is not updated
after set_buffer_attr calls and was always -1, and tlength is just more
appropriate.

old mantis resulting in some changes, still fixed. https://obsproject.com/mantis/view.php?id=1076
fixes #7574
2023-02-25 15:13:08 -08:00
2021-11-25 20:59:11 +11:00
2022-08-11 20:04:01 -04:00
2023-01-08 04:10:37 +00:00
2021-10-24 00:35:27 -07:00
2018-07-14 08:21:00 +01:00

OBS Studio <https://obsproject.com>
===================================

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What is OBS Studio?
-------------------

OBS Studio is software designed for capturing, compositing, encoding,
recording, and streaming video content, efficiently.

It's distributed under the GNU General Public License v2 (or any later
version) - see the accompanying COPYING file for more details.

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-----------

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OBS Studio - Free and open source software for live streaming and screen recording
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