Fixes a bug where if the theme was changed, then wasn't saved, and the
user exits the window with the [x] button, then chooses "No" when asked
to save settings, it would not restore the original theme.

libobs: Remove log entry for CoInitializeEx pass

Remove entry from the top of the log. Always returns S_FALSE, and that's
unlikely to change.

libobs/util: Fix POSIX event bugs

libobs: Fix da_reserve early return logic

mac-capture: Use resize instead of reserve

Handle spurious wakeups, and ensure mutex unlock.

Test desired capacity against original capacity instead of size.

Better practice for the tracked size to be nonzero.

This does NOT speed up window capture significantly.

plugins: Add oss-audio input support

obs-ffmpeg: Fix AVFrame handling in FFmpeg output

CI: Update Github Actions with caching and macOS improvements

libobs-winrt: win-capture: Detect GraphicsCaptureItem closure

Make WGC window capture recover from GraphicsCaptureItem closure, which
can occur when following links in fullscreen Chrome for example.

Fix an issue in the way AVFrames were handled in the FFmpeg
encoder plugin, which could lead to tearing in the encoded
video due to data races in the AVFrame and AVBuffer.

This is fixed by calling av_frame_make_writable which ensures
the frame and its associated buffer are writable. If its not,
it will copy the AVFrame, create a new AVBuffer for it and
decrease the refcount of the old AVFrame and AVBuffer.
This way OBS always ends up with a usable buffer to write into
which is not still used by the encoder while avoiding a copy
when unnecessary.

A long standing lack of synchronization on the elevated process handle
made the non-elevated process always exit, so the updater would assume
it was started elevated and launch OBS from the elevated context.

Also applies the altered working directory to the non-elevated code
path so it can find the OBS executable properly.

libobs: Don't allow duplicating scene sources

deps/glad: Fix build with GCC-10

GCC-10 defaults to '-fno-common' [1], which triggers issues with
defining global variables multiple times.  To fix the build, use
'extern' to turn the first definition of 'gladGetProcAddressPtr'
into a declaration.

1. https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85678

Closes https://github.com/obsproject/obs-studio/issues/2828

vlc-video: Add procedure to receive media metadata

rtmp-services: Add Xlovecam.com streaming service

libobs: Additionally use SetThreadDescription if possible

Closes obsproject/obs-studio#2813

obs-plugins: Check if sources are showing for media hotkeys

obs-scripting: Expose platform functions to scripts

rtmp-services: Update GameTips.TV

It's the better way to declare thread names, but you need Windows 10,
version 1607 to use it.

libobs: Add Windows 10 release version to crash log

Original code makes duplicated item and bad memory

Closes obsproject/obs-studio#2837

libobs-opengl: Lock Mac parent context during present

Closes obsproject/obs-studio#2843

Parent context lock keeps GL commands serialized.

Fixes race that causes crash when resizing multiview.

This implements OSS audio input capturing support for OSS-capable OSes.
FreeBSD and DragonFly (not yet tested on) supports are added as a
starting point.

Follow-up to eadb96fb.

obs-ffmpeg: Update error message in process_packet

rtmp-services: Add Nimo TV