obs-filters: Fix building of noise reduction

If speex and rnnoise are disabled but nvafx is enabled, the noise
reduction filter still needs to be built. This fixes the issue.

Co-authored-by: Ryan Foster <ryan@obsproject.com>
Signed-off-by: pkv <pkv@obsproject.com>

plugins/obs-filters/CMakeLists.txt

@@ -5,10 +5,6 @@ legacy_check()
 add_library(obs-filters MODULE)
 add_library(OBS::filters ALIAS obs-filters)
 
-if(OS_WINDOWS)
-  target_enable_feature(obs-filters "NVIDIA Audio FX support" LIBNVAFX_ENABLED HAS_NOISEREDUCTION)
-endif()
-
 target_sources(
   obs-filters
   PRIVATE
@@ -41,6 +37,7 @@ include(cmake/speexdsp.cmake)
 include(cmake/rnnoise.cmake)
 
 if(OS_WINDOWS)
+  include(cmake/nvidia.cmake)
   configure_file(cmake/windows/obs-module.rc.in obs-filters.rc)
   target_sources(obs-filters PRIVATE obs-filters.rc)
 endif()

plugins/obs-filters/cmake/nvidia.cmake

@@ -0,0 +1,4 @@
+if(ENABLE_NVAFX)
+  target_sources(obs-filters PRIVATE noise-suppress-filter.c)
+  target_compile_definitions(obs-filters PRIVATE LIBNVAFX_ENABLED HAS_NOISEREDUCTION)
+endif()