Removes prior attempt to expose libcaption headers which really shouldnt
have public. This instead moves the obs-internal include out of the
public obs-scene.h and into it's implementation.

Allows for identification of sources in studio mode

Helper function to find DXGI output index of HMONITOR.

This adds a function find module library.
Co-authored-by: NStéphane Lepin <stephane.lepin@gmail.com>

Sets thread names for the hotkey and v4l2 capture threads.

Does nothing without linear-aware modifications to sources.

GS_RGBA, GS_BGRX, and GS_BGRA now use TYPELESS DXGI formats, so we can
alias them between UNORM and UNORM_SRGB as necessary. GS_RGBA_UNORM,
GS_BGRX_UNORM, and GS_BGRA_UNORM have been added to support straight
UNORM types, which Windows requires for sharing textures from D3D9 and
OpenGL. The D3D path aliases via views, and GL aliases via
GL_EXT_texture_sRGB_decode/GL_FRAMEBUFFER_SRGB.

A significant amount of code has changed in the D3D/GL backends, but the
concepts are simple. On the D3D side, we need separate SRVs and RTVs to
support nonlinear/linear reads and writes. On the GL side, we need to
set the proper GL parameters to emulate the same.

Add gs_enable_framebuffer_srgb/gs_framebuffer_srgb_enabled to set/get
the framebuffer as SRGB or not.

Add gs_linear_srgb_active/gs_set_linear_srgb to instruct sources that
they should render as SRGB. Legacy sources can ignore this setting
without regression.

Update obs_source_draw to use linear SRGB as needed.

Update render_filter_tex to use linear SRGB as needed.

Add gs_effect_set_texture_srgb next to gs_effect_set_texture to set
texture with SRGB view instead.

Add SRGB helpers for vec4 struct.

Create GDI-compatible textures without SRGB support. Doesn't seem to
work with SRGB formats.

This function determines if something is an OBS plugin before attempting
to load it. On Windows, many plugins ship their dependent DLLs alongside
the plugin DLL, so OBS would load things like libcef.dll on startup only
to immediately free it. For other platforms, this is less of a concern
so this function is a no-op for now.

This improves startup time and reduces risk from dependent DLLs
potentially running code with unwanted side effects in DllMain.

Also remove use of deprecated [NSProcessInfo operatingSystem]. It always
returns the NSMACHOperatingSystem.

Also stop parsing [NSProcessInfo operatingSystemVersionString]. The
documentation explicitly says "not for parsing".

Make sure libobs links all libraries needed to satisfy symbols in the
library.

Fixes obsproject/obs-studio#3924

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.

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

PulseAudio code needs to be called with the PA lock held. This chiefly
fixes multiple races during stream shutdown:

* If the functions are called without the lock held, deferred event
  handling races end up with PA infinite looping on the mainloop, or
  asserting, or other badness, as the reentrant calls cause data
  structure corruption on the PA side.
* If we don't reset our callbacks, PA might call us even after we
  request stream disconnection (since the stream actually getting fully
  shut down is asynchronous), and then we dereference NULL pointers from
  our userdata etc. PA will keep its data structures alive until necessary
  via reference counting, but not ours.

The lock around pa_stream_begin_write doesn't result from any issues I
experienced, but it looks correct; PA doesn't say anywhere that that
function is thread-safe.

Regression introduced by dc4e2050: while the stop detection is pending,
it should still return false so the rest of the discard code can run.
Otherwise, the source audio will remain in the buffer, lagging the
source and triggering audio buffering increases until max audio
buffering is reached.

Similar to 315fbd6f and 6071098a, ignore non-fatal errors during the
remux process. It's possible OBS itself writes a file that generates
these errors when remuxed.

This can be useful for reading from textures provided by middleware.

(This commit also modifies rtmp-services and UI)

Changes the maximum resolution size to a resolution list, and splits the
maximum FPS to its own function.

(Note: ABI has not been modified because the last changes still haven't
been released yet, so it's safe to modify this as long as the changes
haven't been officially released)

(This commit also modifies rtmp-services)

Implements obs_service_get_max_bitrate, which allows retrieving the
maximum audio/video bitrates directly rather than being forced to use
the apply method. Makes it a bit easier to get the bitrate values.

(This commit also modifies libobs, UI)