UE-74862 : Reusable media encoder framework implementation

#rb Andriy.Tylychko

[CL 10462307 by Rui Figueira in Main branch]

Engine/Source/Runtime/AVEncoder/Private/AVEncoderCommon.h

@@ -0,0 +1,76 @@
+// Copyright 1998-2019 Epic Games, Inc. All Rights Reserved.
+
+#pragma once
+
+#include "CoreMinimal.h"
+#include "Stats/Stats.h"
+#include "Logging/LogMacros.h"
+#include "RHIStaticStates.h"
+#include "HAL/ThreadSafeBool.h"
+#include "HAL/ThreadSafeCounter.h"
+#include "HAL/Thread.h"
+#include "HAL/Event.h"
+#include "Misc/ScopeExit.h"
+#include "ShaderCore.h"
+#include "ProfilingDebugging/CsvProfiler.h"
+#include "RHI.h"
+#include "RHIResources.h"
+#include "ScreenRendering.h"
+#include "CommonRenderResources.h"
+
+DECLARE_LOG_CATEGORY_EXTERN(LogAVEncoder, Log, All);
+CSV_DECLARE_CATEGORY_EXTERN(AVEncoder);
+
+namespace AVEncoder
+{
+
+template<typename F>
+inline void ExecuteRHICommand(F&& Functor)
+{
+	FRHICommandList& RHICmdList = FRHICommandListExecutor::GetImmediateCommandList();
+	if (RHICmdList.Bypass())
+	{
+		Functor();
+	}
+	else
+	{
+		FRHICOMMAND_MACRO(FLocalRHICommand)
+		{
+			F Functor;
+
+			FLocalRHICommand(F InFunctor)
+				: Functor(MoveTemp(InFunctor))
+			{}
+
+			void Execute(FRHICommandListBase& CmdList)
+			{
+				Functor();
+			}
+		};
+
+		new (RHICmdList.AllocCommand<FLocalRHICommand>()) FLocalRHICommand(Functor);
+	}
+}
+
+// Settings specific to  
+struct FH264Settings
+{
+	enum ERateControlMode
+	{
+		ConstQP,
+		VBR,
+		CBR
+	};
+
+	int QP = 20;
+	ERateControlMode RcMode = ERateControlMode::CBR;
+};
+
+bool ReadH264Setting(const FString& Name, const FString& Value, FH264Settings& OutSettings);
+void ReadH264Settings(const TArray<TPair<FString, FString>>& Options, FH264Settings& OutSettings);
+
+void CopyTextureImpl(const FTexture2DRHIRef& Src, FTexture2DRHIRef& Dst, FRHIGPUFence* GPUFence);
+
+}
+
+