Scaling shouldn't be part of the Source and instead should be done as a filter. Not only does supporting it drastically increase code complexity, it also doesn't add anything that is really necessary as you can do everything it did better in an actual transform.
Caching wasn't actually used except for scaling and was mostly broken too, causing flickering.
Adds support for specifying Minimum Bitrate directly in the UI instead of requiring custom settings to do so. Additionally Adaptive I/B-Frames are now only shown if Look-Ahead is a value greater than 0 frames.
Quality Minimum can also now be left at a default value of -1, the Quality group is no longer toggleable and Quality Target moved into the group. Settings options on the context is now searching children too (if there are any).
Finally, some C++17 formatting was done.
Fixes#101
Scaling is now fully supported for Floats and Integers, which allows much higher precision inputs, or upscaling to a different range. Complex functions for scaling are not supported as those would be a scripting thing and should be kept as that (OBS Studio has built in Lua scripting).
Additionally, enumerations are now correctly loaded with data.
Related #5
Allow for overriding type and size of an element, opening the path for `int#[]`, `float#[]`, `int#x#`, `float#x#`, `bool#x#`, `vector<type, #>` and `matrix<type, #, #>`. Also allows for specifying the exact type of texture instead of hoping the user gets it right, as well as samplers.
Parameters are also now created if they are invisible, which means that the properties() function must not be called, but they must still be used like any other. This is due to a problem with default values not being applied all the time, and sometimes just vanishing.
The code also now throws exceptions with reasonable text, which should be caught by the gfx::shader implementation and refuse a load of the effect. No other state should be modified at that point, so care must be taken that up until the moment the complete initialization is done no other state is modified.
Thanks to the workaround in obs::tools, gfx::shader::shader now supports dynamically rebuilding the properties with new properties without crashing OBS Studio. This effectively allows you to have an up to date view of the current parameters for the shader technique.
Additionally with file watching, live development of shaders is possible at very little cost. Currently only file times and size is looked at every 333ms, but in the future it is possible to also watch for file renames and more.
The current implementation of obs_properties_remove_by_name corrupts the obs_properties_t object whenever it is called on the first or last property in the list. This leads to rapid unscheduled disassembly, and therefore must be fixed in order for this function to be used.
Fixed by upstream PR https://github.com/obsproject/obs-studio/pull/2257.
Removes the stutter when re-opening the properties dialog which was caused by recompiling the same exact shader every time this happened. Also paves the way for simple file watching.
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.
