obs-filters: Factor out NVIDIA Audio effects

Currently, the three NVIDIA Audio Effects (noise suppression, room echo
removal, noise suppression + room echo removal combined) are part of
the noise suppression filter.
Historically, it's because a lot of code was shared between speex,
rnnoise & NVIDIA noise suppression.
But the NVIDIA code has become bulkier & cumbersome due to:
- addition of other effects;
- addition of a deferred loading thread.
The factorisation makes the code very difficult to maintain for
(un)readability reasons.
This will make it easier to add other audio effects, should we wish to.
Developers life will be easier too when debugging.
The code has been reorganized and comments added.
I also added a mutex in the process_fx function to avoid a crash when
swapping effects.
A deprecation warning has been added to the noise suppression filter to
direct users to the new filter.

Signed-off-by: pkv <[email protected]>

plugins/obs-filters/cmake/legacy.cmake

@@ -167,7 +167,10 @@ if(LIBNVVFX_FOUND)
   target_sources(obs-filters PRIVATE nvidia-greenscreen-filter.c)
   obs_status(STATUS "NVIDIA Video FX support enabled; requires redist to be installed by end-user")
 endif()
-
+if(LIBNVAFX_FOUND)
+  target_sources(obs-filters PRIVATE nvidia-audiofx-filter.c)
+  obs_status(STATUS "NVIDIA Audio FX support enabled; requires redist to be installed by end-user")
+endif()
 target_include_directories(obs-filters PRIVATE $<BUILD_INTERFACE:${CMAKE_BINARY_DIR}/config>)
 
 target_link_libraries(obs-filters PRIVATE OBS::libobs)

plugins/obs-filters/cmake/nvidia.cmake

@@ -5,6 +5,7 @@ endif()
 
 if(ENABLE_NVAFX)
   target_enable_feature(obs-filters "NVIDIA Audio FX support" LIBNVAFX_ENABLED HAS_NOISEREDUCTION)
+  target_sources(obs-filters PRIVATE nvidia-audiofx-filter.c)
 else()
   target_disable_feature(obs-filters "NVIDIA Audio FX support")
 endif()

plugins/obs-filters/data/locale/en-US.ini

@@ -88,6 +88,7 @@ NoiseSuppress.Method.Nvafx.Denoiser="NVIDIA Noise Removal"
 NoiseSuppress.Method.Nvafx.Dereverb="NVIDIA Room Echo Removal"
 NoiseSuppress.Method.Nvafx.DenoiserPlusDereverb="NVIDIA Noise Removal + Room Echo Removal"
 NoiseSuppress.Method.Nvafx.Deprecation="WARNING: Please upgrade both NVIDIA Video & Audio SDK. Your current version of Audio SDK is outdated."
+NoiseSuppress.Method.Nvafx.Deprecation2="WARNING: NVIDIA Audio Effects are planned for removal from the 'noise suppression' filter. If you use them, please migrate to the new dedicated filter 'NVIDIA Audio Effects'."
 Saturation="Saturation"
 HueShift="Hue Shift"
 Amount="Amount"
@@ -133,3 +134,4 @@ Upward.Compressor="Upward Compressor"
 3BandEq.low="Low"
 3BandEq.mid="Mid"
 3BandEq.high="High"
+NvidiaAudioFX="NVIDIA Audio Effects"

plugins/obs-filters/noise-suppress-filter.c

@@ -61,6 +61,8 @@ bool nvafx_loaded = false;
 	MT_("NoiseSuppress.Method.Nvafx.DenoiserPlusDereverb")
 #define TEXT_METHOD_NVAFX_DEPRECATION \
 	MT_("NoiseSuppress.Method.Nvafx.Deprecation")
+#define TEXT_METHOD_NVAFX_DEPRECATION2 \
+	MT_("NoiseSuppress.Method.Nvafx.Deprecation2")
 
 #define MAX_PREPROC_CHANNELS 8
 
@@ -622,6 +624,41 @@ static void noise_suppress_update(void *data, obs_data_t *s)
 #pragma warning(push)
 #pragma warning(disable : 4706)
 #endif
+void release_lib(void)
+{
+#ifdef LIBNVAFX_ENABLED
+	NvAFX_GetEffectList = NULL;
+	NvAFX_CreateEffect = NULL;
+	NvAFX_CreateChainedEffect = NULL;
+	NvAFX_DestroyEffect = NULL;
+	NvAFX_SetU32 = NULL;
+	NvAFX_SetU32List = NULL;
+	NvAFX_SetString = NULL;
+	NvAFX_SetStringList = NULL;
+	NvAFX_SetFloat = NULL;
+	NvAFX_SetFloatList = NULL;
+	NvAFX_GetU32 = NULL;
+	NvAFX_GetString = NULL;
+	NvAFX_GetStringList = NULL;
+	NvAFX_GetFloat = NULL;
+	NvAFX_GetFloatList = NULL;
+	NvAFX_Load = NULL;
+	NvAFX_GetSupportedDevices = NULL;
+	NvAFX_Run = NULL;
+	NvAFX_Reset = NULL;
+	if (nv_audiofx) {
+		FreeLibrary(nv_audiofx);
+		nv_audiofx = NULL;
+	}
+	cuCtxGetCurrent = NULL;
+	cuCtxPopCurrent = NULL;
+	cuInit = NULL;
+	if (nv_cuda) {
+		FreeLibrary(nv_cuda);
+		nv_cuda = NULL;
+	}
+#endif
+}
 bool load_nvafx(void)
 {
 #ifdef LIBNVAFX_ENABLED
@@ -1236,6 +1273,12 @@ static obs_properties_t *noise_suppress_properties(void *data)
 		obs_property_set_long_description(
 			warning, TEXT_METHOD_NVAFX_DEPRECATION);
 	}
+	obs_property_t *warning2 = obs_properties_add_text(ppts, "deprecation2",
+							   NULL, OBS_TEXT_INFO);
+	obs_property_text_set_info_type(warning2, OBS_TEXT_INFO_WARNING);
+	obs_property_set_long_description(warning2,
+					  TEXT_METHOD_NVAFX_DEPRECATION2);
+
 #if defined(LIBRNNOISE_ENABLED) && defined(LIBSPEEXDSP_ENABLED)
 	if (!nvafx_loaded) {
 		obs_property_list_item_disable(method, 2, true);

plugins/obs-filters/nvafx-load.h

@@ -1,3 +1,4 @@
+#pragma once
 #include <Windows.h>
 #include <stdio.h>
 #include <stdbool.h>
@@ -252,40 +253,6 @@ static cuCtxGetCurrent_t cuCtxGetCurrent = NULL;
 static cuCtxPopCurrent_t cuCtxPopCurrent = NULL;
 static cuInit_t cuInit = NULL;
 
-void release_lib(void)
-{
-	NvAFX_GetEffectList = NULL;
-	NvAFX_CreateEffect = NULL;
-	NvAFX_CreateChainedEffect = NULL;
-	NvAFX_DestroyEffect = NULL;
-	NvAFX_SetU32 = NULL;
-	NvAFX_SetU32List = NULL;
-	NvAFX_SetString = NULL;
-	NvAFX_SetStringList = NULL;
-	NvAFX_SetFloat = NULL;
-	NvAFX_SetFloatList = NULL;
-	NvAFX_GetU32 = NULL;
-	NvAFX_GetString = NULL;
-	NvAFX_GetStringList = NULL;
-	NvAFX_GetFloat = NULL;
-	NvAFX_GetFloatList = NULL;
-	NvAFX_Load = NULL;
-	NvAFX_GetSupportedDevices = NULL;
-	NvAFX_Run = NULL;
-	NvAFX_Reset = NULL;
-	if (nv_audiofx) {
-		FreeLibrary(nv_audiofx);
-		nv_audiofx = NULL;
-	}
-	cuCtxGetCurrent = NULL;
-	cuCtxPopCurrent = NULL;
-	cuInit = NULL;
-	if (nv_cuda) {
-		FreeLibrary(nv_cuda);
-		nv_cuda = NULL;
-	}
-}
-
 static bool nvafx_get_sdk_path(char *buffer, const size_t len)
 {
 	DWORD ret =
@@ -334,4 +301,5 @@ static unsigned int get_lib_version(void)
 	SetDllDirectoryA(NULL);
 	return version;
 }
+
 #endif