Revert needed, since otherwise there is no way to do automatic sorting
of includes.
Also reverted change to the docs, as leaving it would make incorrect
docs.
In case of conflicts, includes were sorted according to the coding
standards from #3839.
This reverts commit b4a9f04f92.
This reverts commit 5921122960.
The filter_audio API is not working for qTox/Tox and thus disabled by default via compiler switch. In current qTox UI, it is not configurable, even when this switch is enabled. According to issue #3194 the library is no longer maintained as well. I don't see any reason to keep it in qTox.
We now subscribe to an event and wait for frames when capturing audio
input, the big avdantage is that we only have to fetch the frames from
the hardware once, and we don't need to cache anything.
The frames are simply dispatched to the client's callbacks immediately.
Also removes some outdated ifdefs that did not apply anymore.
And properly handle toxav happily delivering things out of order,
like firing a video frame callback right after a callback setting the bitrate to 0,
when the peer sent these commands in the right order
