C++ FByteBulkData::Lock方法代码示例

FByteBulkData* USoundWave::GetCompressedData(FName Format)
{
	if (IsTemplate() || IsRunningDedicatedServer())
	{
		return NULL;
	}
	bool bContainedData = CompressedFormatData.Contains(Format);
	FByteBulkData* Result = &CompressedFormatData.GetFormat(Format);
	if (!bContainedData)
	{
		if (!FPlatformProperties::RequiresCookedData() && GetDerivedDataCache())
		{
			TArray<uint8> OutData;
			FDerivedAudioDataCompressor* DeriveAudioData = new FDerivedAudioDataCompressor(this, Format);
			GetDerivedDataCacheRef().GetSynchronous(DeriveAudioData, OutData);
			if (OutData.Num())
			{
				Result->Lock(LOCK_READ_WRITE);
				FMemory::Memcpy(Result->Realloc(OutData.Num()), OutData.GetData(), OutData.Num());
				Result->Unlock();
			}
		}
		else
		{
			UE_LOG(LogAudio, Error, TEXT("Attempt to access the DDC when there is none available on sound '%s', format = %s. Should have been cooked."), *GetFullName(), *Format.ToString());
		}
	}
	check(Result);
	return Result->GetBulkDataSize() > 0 ? Result : NULL; // we don't return empty bulk data...but we save it to avoid thrashing the DDC
}

FByteBulkData* UNavCollision::GetCookedData(FName Format)
{
	if (IsTemplate())
	{
		return NULL;
	}
	
	bool bContainedData = CookedFormatData.Contains(Format);
	FByteBulkData* Result = &CookedFormatData.GetFormat(Format);

	if (!bContainedData)
	{
		if (FPlatformProperties::RequiresCookedData())
		{
			UE_LOG(LogNavigation, Fatal, TEXT("Attempt to build nav collision data for %s when we are unable to. This platform requires cooked packages."), *GetPathName());
		}
		
		TArray<uint8> OutData;
		FDerivedDataNavCollisionCooker* DerivedNavCollisionData = new FDerivedDataNavCollisionCooker(Format, this);
		if (DerivedNavCollisionData->CanBuild() 
			&& GetDerivedDataCacheRef().GetSynchronous(DerivedNavCollisionData, OutData))
		{
			if (OutData.Num())
			{
				Result->Lock(LOCK_READ_WRITE);
				FMemory::Memcpy(Result->Realloc(OutData.Num()), OutData.GetData(), OutData.Num());
				Result->Unlock();
			}
		}
	}

	check(Result);
	return Result->GetBulkDataSize() > 0 ? Result : NULL; // we don't return empty bulk data...but we save it to avoid thrashing the DDC
}

FByteBulkData* UBodySetup::GetCookedData(FName Format)
{
	if (IsTemplate())
	{
		return NULL;
	}

	IInterface_CollisionDataProvider* CDP = Cast<IInterface_CollisionDataProvider>(GetOuter());

	// If there is nothing to cook or if we are reading data from a cooked package for an asset with no collision, 
	// we want to return here
	if ((AggGeom.ConvexElems.Num() == 0 && CDP == NULL) || !bHasCookedCollisionData)
	{
		return NULL;
	}

	FFormatContainer* UseCookedData = CookedFormatDataOverride ? CookedFormatDataOverride : &CookedFormatData;

	bool bContainedData = UseCookedData->Contains(Format);
	FByteBulkData* Result = &UseCookedData->GetFormat(Format);
#if WITH_PHYSX
	if (!bContainedData)
	{
		if (FPlatformProperties::RequiresCookedData())
		{
			UE_LOG(LogPhysics, Error, TEXT("Attempt to build physics data for %s when we are unable to. This platform requires cooked packages."), *GetPathName());
		}

		if (AggGeom.ConvexElems.Num() == 0 && (CDP == NULL || CDP->ContainsPhysicsTriMeshData(bMeshCollideAll) == false))
		{
			return NULL;
		}

#if WITH_RUNTIME_PHYSICS_COOKING || WITH_EDITOR
		TArray<uint8> OutData;
		FDerivedDataPhysXCooker* DerivedPhysXData = new FDerivedDataPhysXCooker(Format, this);
		if (DerivedPhysXData->CanBuild())
		{
		#if WITH_EDITOR
			GetDerivedDataCacheRef().GetSynchronous(DerivedPhysXData, OutData);
		#elif WITH_RUNTIME_PHYSICS_COOKING
			DerivedPhysXData->Build(OutData);
		#endif
			if (OutData.Num())
			{
				Result->Lock(LOCK_READ_WRITE);
				FMemory::Memcpy(Result->Realloc(OutData.Num()), OutData.GetData(), OutData.Num());
				Result->Unlock();
			}
		}
		else
#endif
		{
			UE_LOG(LogPhysics, Warning, TEXT("Attempt to build physics data for %s when we are unable to."), *GetPathName());
		}
	}
#endif // WITH_PHYSX
	check(Result);
	return Result->GetBulkDataSize() > 0 ? Result : NULL; // we don't return empty bulk data...but we save it to avoid thrashing the DDC
}

FPhysXFormatDataReader::FPhysXFormatDataReader( FByteBulkData& InBulkData )
	: TriMesh( NULL )
	, TriMeshNegX( NULL )
{
	// Read cooked physics data
	uint8* DataPtr = (uint8*)InBulkData.Lock( LOCK_READ_ONLY );
	FBufferReader Ar( DataPtr, InBulkData.GetBulkDataSize(), false );
	
	uint8 bLittleEndian = true;
	int32 NumConvexElementsCooked = 0;
	int32 NumMirroredElementsCooked = 0;
	uint8 bTriMeshCooked = false;
	uint8 bMirroredTriMeshCooked = false;

	Ar << bLittleEndian;
	Ar.SetByteSwapping( PLATFORM_LITTLE_ENDIAN ? !bLittleEndian : !!bLittleEndian );
	Ar << NumConvexElementsCooked;	
	Ar << NumMirroredElementsCooked;
	Ar << bTriMeshCooked;
	Ar << bMirroredTriMeshCooked;
	
	ConvexMeshes.Empty( NumConvexElementsCooked );
	ConvexMeshesNegX.Empty( NumMirroredElementsCooked );

	for( int32 ElementIndex = 0; ElementIndex < NumConvexElementsCooked; ElementIndex++ )
	{
		PxConvexMesh* ConvexMesh = ReadConvexMesh( Ar, DataPtr, InBulkData.GetBulkDataSize() );
		ConvexMeshes.Add( ConvexMesh );
	}

	for( int32 ElementIndex = 0; ElementIndex < NumMirroredElementsCooked; ElementIndex++ )
	{
		PxConvexMesh* ConvexMeshNegX = ReadConvexMesh( Ar, DataPtr, InBulkData.GetBulkDataSize() );
		ConvexMeshesNegX.Add( ConvexMeshNegX );
	}

	if( bTriMeshCooked )
	{
		TriMesh = ReadTriMesh( Ar, DataPtr, InBulkData.GetBulkDataSize() );
		check(TriMesh);	
	}

	if( bMirroredTriMeshCooked )
	{
		TriMeshNegX = ReadTriMesh( Ar, DataPtr, InBulkData.GetBulkDataSize() );
		check(TriMeshNegX);	
	}

	InBulkData.Unlock();
}

FByteBulkData* UPhysicsSerializer::GetBinaryData(FName Format, const TArray<FBodyInstance*>& Bodies, const TArray<class UBodySetup*>& BodySetups, const TArray<class UPhysicalMaterial*>& PhysicalMaterials)
{
	if (!FParse::Param(FCommandLine::Get(), TEXT("PhysxSerialization")))
	{
		return nullptr;
	}

#if PLATFORM_MAC
	return nullptr;	//This is not supported right now
#endif

	QUICK_SCOPE_CYCLE_COUNTER(STAT_GetBinaryData);
	const bool bContainedData = BinaryFormatData.Contains(Format);
	FByteBulkData* Result = &BinaryFormatData.GetFormat(Format);
	if (!FParse::Param(FCommandLine::Get(), TEXT("NoPhysxAlignment")))
	{
		Result->SetBulkDataAlignment(PHYSX_SERIALIZATION_ALIGNMENT);
	}
	
	if (!bContainedData)
	{
#if WITH_EDITOR
#if WITH_PHYSX
		TArray<uint8> OutData;
		FDerivedDataPhysXBinarySerializer* DerivedPhysXSerializer = new FDerivedDataPhysXBinarySerializer(Format, Bodies, BodySetups, PhysicalMaterials, FGuid::NewGuid()); //TODO: Maybe it's worth adding this to the DDC. For now there's a lot of complexity with the guid invalidation so I've left it out.
		if (DerivedPhysXSerializer->CanBuild())
		{

			DerivedPhysXSerializer->Build(OutData);
#endif
			if (OutData.Num())
			{
				Result->Lock(LOCK_READ_WRITE);
				FMemory::Memcpy(Result->Realloc(OutData.Num()), OutData.GetData(), OutData.Num());
				Result->Unlock();
			}
		}
		else
#endif
		{
			UE_LOG(LogPhysics, Warning, TEXT("Attempt to use binary physics data but we are unable to."));
		}
	}

	return Result->GetBulkDataSize() > 0 ? Result : nullptr;
}

FPhysXFormatDataReader::FPhysXFormatDataReader( FByteBulkData& InBulkData, FBodySetupUVInfo* UVInfo )
{
	// Read cooked physics data
	uint8* DataPtr = (uint8*)InBulkData.Lock( LOCK_READ_ONLY );
	FBufferReader Ar( DataPtr, InBulkData.GetBulkDataSize(), false );
	
	uint8 bLittleEndian = true;
	int32 NumConvexElementsCooked = 0;
	int32 NumMirroredElementsCooked = 0;
	int32 NumTriMeshesCooked = 0;

	Ar << bLittleEndian;
	Ar.SetByteSwapping( PLATFORM_LITTLE_ENDIAN ? !bLittleEndian : !!bLittleEndian );
	Ar << NumConvexElementsCooked;	
	Ar << NumMirroredElementsCooked;
	Ar << NumTriMeshesCooked;
	
	ConvexMeshes.Empty(NumConvexElementsCooked);
	for( int32 ElementIndex = 0; ElementIndex < NumConvexElementsCooked; ElementIndex++ )
	{
		PxConvexMesh* ConvexMesh = ReadConvexMesh( Ar, DataPtr, InBulkData.GetBulkDataSize() );
		ConvexMeshes.Add( ConvexMesh );
	}

	ConvexMeshesNegX.Empty(NumMirroredElementsCooked);
	for( int32 ElementIndex = 0; ElementIndex < NumMirroredElementsCooked; ElementIndex++ )
	{
		PxConvexMesh* ConvexMeshNegX = ReadConvexMesh( Ar, DataPtr, InBulkData.GetBulkDataSize() );
		ConvexMeshesNegX.Add( ConvexMeshNegX );
	}

	TriMeshes.Empty(NumTriMeshesCooked);
	for(int32 ElementIndex = 0; ElementIndex < NumTriMeshesCooked; ++ElementIndex)
	{
		PxTriangleMesh* TriMesh = ReadTriMesh( Ar, DataPtr, InBulkData.GetBulkDataSize() );
		TriMeshes.Add(TriMesh);
	}

	// Init UVInfo pointer
	check(UVInfo);
	Ar << *UVInfo;

	InBulkData.Unlock();
}

	FNavCollisionDataReader(FByteBulkData& InBulkData, FNavCollisionConvex& InTriMeshCollision, FNavCollisionConvex& InConvexCollision, TNavStatArray<int32>& InShapeIndices)
		: TriMeshCollision(InTriMeshCollision)
		, ConvexCollision(InConvexCollision)
		, ConvexShapeIndices(InShapeIndices)
	{
		// Read cooked data
		uint8* DataPtr = (uint8*)InBulkData.Lock( LOCK_READ_ONLY );
		FBufferReader Ar( DataPtr, InBulkData.GetBulkDataSize(), false );

		uint8 bLittleEndian = true;

		Ar << bLittleEndian;
		Ar.SetByteSwapping( PLATFORM_LITTLE_ENDIAN ? !bLittleEndian : !!bLittleEndian );
		Ar << TriMeshCollision.VertexBuffer;
		Ar << TriMeshCollision.IndexBuffer;
		Ar << ConvexCollision.VertexBuffer;
		Ar << ConvexCollision.IndexBuffer;
		Ar << ConvexShapeIndices;

		InBulkData.Unlock();
	}