OBS has been logging `1 views remain at shutdown` when in reality there
are not technically any views remaining. When views are removed, the
view itself is destroyed immediately, but the mix remains, to be
garbage collected by the graphics thread.
In this case, the view has already been removed, but the graphics
thread has not run an interation and cleaned up the mix, so this
log message appears.
Fixes the issue by checking if a mix actually has an assigned view,
instead of blindly logging existing mixes.
Because Intel has wonderful code which forces it to run on the iGPU if
there are both an Intel iGPU and an Intel dGPU on the same system, the
adapter index OBS is set to internally will no longer be valid, thus if
anyone calls `obs_get_video_info()` to try to find out what adapter
index OBS is running on, it will be invalid on those computers.
Wonderful.
So, basically, this code here just fixe it so if you want to call
`obs_get_video_info()`, it'll actually have a valid adapter index now,
that way we can reference the adapter index when determining what GPU
we're actually running on without having to like, do anything super
complicated and silly like comparing adapter GUIDs just to figure out
what adapter OBS is actually runing on. I don't want the code to be a
mess anymore.
(I like how in any other situation on the face of the planet, there's no
need to force OBS to run on an integrated adapter. *Normally* OBS
*should* run on the dedicated adapter, that way it can actually capture
games properly. You can probably guess as to why they're forcing it to
run on the integrated adapter rather than the dedicated adapter. But you
know what? Whatever. I don't really care anymore I guess. Just...
whatever. Here we are I guess. Also I was in a bad mood while writing
this just as a disclaimer.)
(I hate that this commit exist. I hate that the commit c83eaaa51c exists
even more.)
Split render_texture and derived fields in obs_core_video into new
obs_core_video_mix struct. Add new APIs to add additional obs_view to the render loop, each with a separate render_texture / obs_core_video_mix.
If obs_core_hotkeys.strict_modifiers is true (new default),
hotkey is triggered only if current key modifiers exactly match
the hotkey definition. If false, legacy behavior is selected.
Allows a frontend the ability to set the maximum audio buffering
latency, and specify whether that audio buffering is either fixed (to
the maximum audio buffering latency), or dynamically increasing from 0.
This will be useful if the user wishes to output audio to devices or
through a virtual audio device at a guaranteed minimal latency.
HLG output uses MovieLabs-recommended procedure.
- If peak luminance is greater than 1000, use maxRGB EETF to 1000.
- Otherwise, don't tonemap.
- Then use normal HLG conversion procedure with gamma 1.2 (1000 nits).
Rec. 2020 is really an SDR spec, but I think HDR10 made it okay to slap
PQ on it, call it an HDR spec. Rec. 2100 came along after and formally
allowed the use of PQ/HLG, so we should use 2100 instead.
With this, you can now cast normal obs objects (services, outputs,
sources, encoders) to an obs_object_t, and then use obs_object_*
functions to get references, release references, and similar for weak
object references as well. This allows the ability for the frontend to
use an object of any of those types interchangeably in certain
situations without having to handle each specific type individually.
This is useful because the properties view in particular doesn't care
what type of object it uses, it just needs to be able to hold weak
references to abstract OBS objects.
(This also modifies the UI)
The purpose of deferring destruction of sources is to ensure that:
1.) Hard locks from enumeration cannot occur with source destruction.
For example, if the browser source is destroyed while in the graphics
thread, the browser thread would wait for the graphics thread, but the
graphics thread would still be waiting for the browser thread, causing
a hard lock.
2.) When destroys occur during source enumeration, that the integrity of
the context's next pointer in the linked list can no longer be
compromised
3.) Source releases are fully asynchronous rather than having the risk
of stalling the calling thread
4.) We can wait for source destruction when switching scene collections
or when shutting down rather than hoping for threads to be finished
with sources.
This introduces a new requirement when cleaning up scene/source data:
the obs_wait_for_destroy_queue() function. It is highly recommended that
this function be called after cleaning up sources. It will return true
if at least one or more sources were destroyed. Otherwise it will return
false. Forks are highly advised to call this function manually on source
cleanup -- preferably in a loop, in conjunction with processing
outstanding OBS signals and UI events.
obs_source_release should not be called while iterating through the
global sources linked list, otherwise the linked list will be
compromised. Annoying.
Basically the same fix as obsproject/obs-studio#5600, but should be
slightly more optimal and a bit more explicit.
This fixes a crash that could occur during freeing of sources, as the
audio subsystem was destroyed before sources were released. If a source
had monitoring enabled, it would try to lock a mutex that has been
destroyed, resulting in a crash.
Freeing audio after obs_free_data was also not a solution, as the main
view is freed in obs_free_data, and the audio subsystem is still running
and trying to lock the main view channel mutex which has been freed.
This seems to be the best middle ground, making sure the audio subsystem
is stopped so it no longer tries to access the main view channel, then
freed after obs_free_data.
Fixes https://github.com/obsproject/obs-studio/issues/4409
There is currently no way to enumerate *all* sources in OBS. Only
inputs and scenes have a way to be enumerated. Some applications
like obs-websocket have features that need to take advantage
of enumerating all sources in order to function properly.
