improve build configuration

Plugins/GStreamer/Config/FilterPlugin.ini

@@ -0,0 +1,8 @@
+[FilterPlugin]
+; This section lists additional files which will be packaged along with your plugin. Paths should be listed relative to the root plugin directory, and
+; may include "...", "*", and "?" wildcards to match directories, files, and individual characters respectively.
+;
+; Examples:
+;    /README.txt
+;    /Extras/...
+;    /Binaries/ThirdParty/*.dll

Plugins/GStreamer/GStreamer.uplugin

@@ -16,11 +16,5 @@
       "LoadingPhase": "PostEngineInit",
       "WhitelistPlatforms": [ "Win64" ]
     }
-  ],
-  "Plugins": [
-    {
-      "Name": "GStreamerLoader",
-      "Enabled": true
-    }
   ]
 }

Plugins/GStreamer/Source/GStreamer/GStreamer.Build.cs

@@ -6,7 +6,8 @@ public class GStreamer : ModuleRules
     public GStreamer(ReadOnlyTargetRules Target) : base(Target)
     {
         DefaultBuildSettings = BuildSettingsVersion.V2;
-        PCHUsage = PCHUsageMode.UseExplicitOrSharedPCHs;
+        PCHUsage = PCHUsageMode.NoPCHs; // UseExplicitOrSharedPCHs;
+        bUseUnity = false;
         bEnableUndefinedIdentifierWarnings = false;
 
         PublicDependencyModuleNames.AddRange(
@@ -18,26 +19,27 @@ public GStreamer(ReadOnlyTargetRules Target) : base(Target)
                 "RHI",
                 "RenderCore",
                 "Slate",
-                "SlateCore",
-                "GStreamerLoader"
+                "SlateCore"
             }
         );
 
         if (Target.Platform == UnrealTargetPlatform.Win64)
         {
             const string GStreamerRoot = @"C:\dev\gstreamer_dev\1.0\msvc_x86_64"; // path to gstreamer development package
 
-            PublicIncludePaths.Add(Path.Combine(GStreamerRoot, "include"));
-            PublicIncludePaths.Add(Path.Combine(GStreamerRoot, "include", "gstreamer-1.0"));
-            PublicIncludePaths.Add(Path.Combine(GStreamerRoot, "include", "glib-2.0"));
-            PublicIncludePaths.Add(Path.Combine(GStreamerRoot, "lib", "glib-2.0", "include"));
-            PublicLibraryPaths.Add(Path.Combine(GStreamerRoot, "lib"));
+            PrivateIncludePaths.Add(Path.Combine(GStreamerRoot, "include"));
+            PrivateIncludePaths.Add(Path.Combine(GStreamerRoot, "include", "gstreamer-1.0"));
+            PrivateIncludePaths.Add(Path.Combine(GStreamerRoot, "include", "glib-2.0"));
+            PrivateIncludePaths.Add(Path.Combine(GStreamerRoot, "lib", "glib-2.0", "include"));
 
-            PublicAdditionalLibraries.Add("glib-2.0.lib");
-            PublicAdditionalLibraries.Add("gobject-2.0.lib");
-            PublicAdditionalLibraries.Add("gstreamer-1.0.lib");
-            PublicAdditionalLibraries.Add("gstvideo-1.0.lib");
-            PublicAdditionalLibraries.Add("gstapp-1.0.lib");
+            var GStreamerLibPath = Path.Combine(GStreamerRoot, "lib");
+            PublicSystemLibraryPaths.Add(GStreamerLibPath);
+
+            PublicAdditionalLibraries.Add(Path.Combine(GStreamerLibPath, "glib-2.0.lib"));
+            PublicAdditionalLibraries.Add(Path.Combine(GStreamerLibPath, "gobject-2.0.lib"));
+            PublicAdditionalLibraries.Add(Path.Combine(GStreamerLibPath, "gstreamer-1.0.lib"));
+            PublicAdditionalLibraries.Add(Path.Combine(GStreamerLibPath, "gstvideo-1.0.lib"));
+            PublicAdditionalLibraries.Add(Path.Combine(GStreamerLibPath, "gstapp-1.0.lib"));
 
             PublicDelayLoadDLLs.Add("glib-2.0-0.dll");
             PublicDelayLoadDLLs.Add("gobject-2.0-0.dll");

Plugins/GStreamer/Source/GStreamer/Private/GStreamerModule.cpp

@@ -3,6 +3,12 @@
 #include "SharedUnreal.h"
 #include "Runtime/Core/Public/Misc/Paths.h"
 
+#if PLATFORM_WINDOWS
+	#include "Windows/AllowWindowsPlatformTypes.h"
+	#include <windows.h>
+	#include "Windows/HideWindowsPlatformTypes.h"
+#endif
+
 DEFINE_LOG_CATEGORY(LogGStreamer);
 
 class FGStreamerModule : public IGStreamerModule
@@ -25,7 +31,7 @@ static FString GetGstRoot()
 
 void FGStreamerModule::StartupModule()
 {
-	GST_LOG_DBG(TEXT("StartupModule"));
+	UE_LOG(LogGStreamer, Display, TEXT("GStreamerModule::StartupModule"));
 
 	INIT_PROFILER;
 
@@ -37,7 +43,13 @@ void FGStreamerModule::StartupModule()
 	{
 		UE_LOG(LogGStreamer, Display, TEXT("GSTREAMER_ROOT: \"%s\""), *RootPath);
 		BinPath = FPaths::Combine(RootPath, TEXT("bin"));
-		if (!FPaths::DirectoryExists(BinPath))
+		if (FPaths::DirectoryExists(BinPath))
+		{
+			SetDefaultDllDirectories(LOAD_LIBRARY_SEARCH_DEFAULT_DIRS);
+			//SetDllDirectoryW(*BinPath);
+			AddDllDirectory(*BinPath);
+		}
+		else
 		{
 			UE_LOG(LogGStreamer, Error, TEXT("Directory not found: \"%s\""), *BinPath);
 			BinPath = "";

_precompile.cmd

@@ -0,0 +1,5 @@
+set "ENGINE_DIR=C:\dev\UE_4.26"
+set "PROJECT_DIR=C:\dev\ue4-gstreamer"
+set "BUILD_DIR=C:\dev\ue4-gstreamer\Build"
+
+call "%ENGINE_DIR%\Engine\Build\BatchFiles\RunUAT.bat" BuildPlugin -Plugin="%PROJECT_DIR%\Plugins\GStreamer\GStreamer.uplugin" -Package="%BUILD_DIR%\Plugins\GStreamer" -TargetPlatforms=Win64 -Rocket -precompile -VS2019 -StrictIncludes