Getting the resolution of a source is very expensive in libOBS, as libOBS does not cache it and instead always calls into the filters and sources to determine the actual source. This also leads to potential lockups due to the filter list mutex being locked for the target source.
Therefore instead of calling it multiple times, cache the result of the call, if that result is even necessary. This reduces the need to synchronize lightly parallelized work (UI and libOBS code) and helps against the potential race condition in libOBS.
Prevents the use of get() and reset() where not actually needed and forces us to actually implement all of the methods needed to interface with the object, leading to cleaner and safer code.
These two wrap the underlying gs_epass and gs_effect_technique objects, to allow direct and improved access to them without relying on the libobs API to provide this access for us. Additionally these make it safe for us to use them instead of relying on C-like code to deal with it.
This drastically improves stability and prevents all exceptions from leaking into libobs C code, which prevents crashes and unexpected freezes from exception handlers further down the stack.
Additionally minor work was done to further improve the quality and user experience for the filter.
Caching the output of a source is only necessary for really expensive to render sources, so it is disabled by default now. Thanks to that, most Source Mirrors are now "free" instead of requiring two context switches and a texture, while those really expensive can be manually set to cache.
The scaling mode is also set to disabled instead of point when rescaling is off to further improve performance. The previous method would incorrectly cause an extra texture to be used.
Additionally we now have support for debug markers for graphics debugging, allowing us to exactly tell apart improvements in rendering cost for this source.
This class and template should be used to reduce the code clutter from repeatedly doing the same thing. It requires OBS v24.0 or newer since the get_properties2 and get_defaults2 API were fully implemented with it.
This is a massive improvement to stability and safety when using the plugin, as all exceptions should now no longer be leaked into C controlled code, which can't actually handle exceptions at all.
Warnings fixed:
* Potentially throwing exception during library load.
* Possibly throwing function passed to C.
* Statement does nothing.
* Variable is initialized but not referenced.
* Variable overloads variable in parent scope.
It is extremely problematic to throw C++ exceptions into C code, especially because C code usually does not handle C++ exceptions at all. Therefore we have to prevent any exception from leaving the function and define it as noexcept.
The util::event code suffers from the problem that it could call into a class that no longer exists, corrupting memory or even crashing. By tracking lifetime using std::weak_ptr<void> this can be avoided and the dead listeners can be automatically removed.
This fixes the case where the effect vanishes, but we still hold an invalid pointer to a parameter of that effect. With the new code, the effect will not vanish as long as an effect pointer exists.
However, all effects must be created either through std::shared_ptr or std::make_shared. If they were not made through one of those means, the code will crash on the ->shared_from_this() call.
Adds a new property to control the alignment of the source within the calculated boundary when rescaling the source. Also fixes the permanently left aligned mirror at the same time.
Similar to the one used in enc-amf, allows looking up string containing other strings, thus drastically simplifying the necessary time to build translated strings, while also caching them for future use.
When copying or re-ordering filters, an occasional crash can be observed due to the rendering not being possible yet. With this, it will simply revert back to the original source instead of crashing.
Fixes the bug that rendering an outline would remove all other effects not directly under the outline, while also improving the rendering speed drastically by only initializing and clearing the rendertarget once instead of for each effect.
This filter allows the use of another source as a mask, allowing complex filter graphs and trippy effects, such as creating a text source with three animated videos, each using a different color channel as the mask.
Fixes#18.
When a source was renamed, obs::source_tracker did not use the new name and instead relied on the old name. This caused source lists with this feature to slowly degrade over time as sources were renamed, until libobs was restarted.
With this fix the renamed sources are now properly tracked, updating as expected.
Related Issue: #64
Clang on Windows and Clang on Linux behave differently, and of course GCC on Windows (MinGW) and GCC on Linux do too. This is the point where using either compiler on either platform should successfully compile the project without any issues.
Clang and GCC have a ton of warnings however, which definitely need to be fixed in the near future. Some of them are great warnings, like old C style casts, others are non-sense like suggest brackets.
Fixes#47Fixes#60
Automatically updates the long description (hover text) if the Type or Subtype field is changed, allowing for more contextual information about what the selected information does.
This refactors the SDF Effects to use a normal blend function instead of doing the blend in the effect itself, improving quality and reducing problematic sampling issues. In addition to this, the effect files have been cleaned up slightly and renamed to their proper names. Glow and Stroke are now supported, which solves both #2 and #4 in one go.
The caching optimization has also now been implemented, reducing the number of renders for this filter to 1 for each tick.
This fixes a dead lock due to attempting to lock the same filter mutex twice, causing libOBS to completely lock up on every mutex. This extends the fix for 4fc25cfd8d.
Additionally this switches to a proper queue system for audio, so we no longer cause audio stuttering or audio skipping.
To further distance the code from having to do too much manually, the graphics context is now available as a managed class. All places that previously used obs_enter_graphics and obs_leave_graphics are now using the new gs::context class instead.
libOBS will simply forget to unlock a mutex if you set the boundary size to zero, resulting in the filters dialog for that source simply getting stuck. Why video rendering can affect the audio filter dialogs is a question for another time, but it's best to just accept it and move on.
Previously this would not do anything correctly, as the call to obs_source_get_flags does not return anything for most sources. Instead obs_source_get_output_flags should be used to verify that we actually have a video or audio capable source to work with.
obs::source_tracker allows us to do more over more versions of OBS Studio, so we are able to enumerate any and all Sources, Scenes and Transitions that weren't created private. If we were to rely on libOBS for this, we would need to limit ourselves to version 23 or higher, but with this we can go very far back - as far back as the global event system was fully supported.
