CI: Update Qt and Deps on Windows

UI: Enable HW acceleration switch for browser sources on Mac

libobs: Add texture sharing support for macOS/OpenGL

macOS hardware acceleration
multiprocess on macOS

This lock causes a deadlock when freeing the JACK client while a
process callback is pending:

deactivate_jack -> locks mutex
   JACK thread -> calls jack_process_callback
   jack_process_callback -> blocks on mutex
jack_client_close -> joins JACK thread
(deadlock as the process callback never returns)

Instead, just don't lock the mutex. This is only mutexing on
creation/destruction of the JACK client. This is not necessary: the
process callback will only run after jack_activate (which is right
before the mutex is released in jack_init()), and will stop running
by the time jack_client_close returns. We don't actually need to
unregister any ports, so just call jack_client_close first thing in
deactivate_jack, which will guarantee the process callback has
completed before returning.

In fact, jack_process_callback isn't allowed to lock any mutexes or
allocate any memory at all, so this plug-in is still broken in this way
as obs_source_output_audio does that. This can cause audio xruns, as
realtime guarantees are violated. This is something that should be
fixed in the future, but at least it's not a deadlock.

Ports which do not feed audio back into JACK should be marked as terminal.
This allows latency compensation to work properly.

The previous calculation was completely broken, returning offset
timestamps in the best case, and complete insanity in the worst case
(e.g. if an xrun occurs or JACK otherwise has a glitch).

Initialize CEF during obs_module_load() to prevent a crash in Chrome's
memory allocation handler.

Reference: obsproject/obs-browser#256

Closes obsproject/obs-studio#3932

This fixes a bug where the transition wouldn't work when playback
is randomized and restart on activate is used.

https://github.com/simd-everywhere/simde/commit/c3d7abfaba6729a8b11d09a314b34a4db628911d

Simplify usage of the SIMDe header

This obviates the need for sse2neon as well and fixes compilation of all
plugins that referenced sse-intrin.h on all architectures, not just
arm*.

Fixes bug where the lock state wouldn't be copied when duplicating
a scene.

This is necessary on ppc64 to build plugins that use cmake, so that
-DNO_WARN_X86_INTRINSICS is defined.

It's necessary on ppc64 for plugins that use cmake.

This prevents windres to catch up '-Wno-multichar' as an option which is
unknown to it.  This flag was added in commit
aa0e64b7

This reverts commit 4e5f20dc.

This originally was added because of a faulty assumption that it would
change defaults, but defaults were apparently broken from 26.0.2 -> 26.1
because primaryScreen->size() changed its behavior, so the original code
technically fixed the original behavior.

The new scaling behavior affects defaults, so only apply it to new
installs of 26.2 or greater, while maintaining the previous behavior if
the user is upgrading from an older version.

Without this change, new profiles created on systems using a fractional
scaling factor (e.g., 125%, 150%, 175%) will get an incorrect (X, Y)
pair for the new canvas size. For a display with 125% scaling, OBS would
set (1536, 864) instead of (1920, 1080). With this change, it will set
(1920, 1080).

Removes logging from the DAL plugin that is not really necessary but spams Console.app

Marks function parameters as unused, removing compiler warnings

FFmpeg functions such as av_interleaved_write_frame return negative
on error, so all errno values are negated.