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  3. FIoChunkEncoding

FIoChunkEncoding

Encodes data into a set of encrypted and compressed blocks.

API > API/Runtime > API/Runtime/Core

Encodes data into a set of encrypted and compressed blocks. The chunk encoding information is enocoded into a 16 byte header followed by N block sizes.

   
Name FIoChunkEncoding
Type class
Header File /Engine/Source/Runtime/Core/Public/IO/IoChunkEncoding.h
Include Path #include "IO/IoChunkEncoding.h"

Syntax

class FIoChunkEncoding

Structs

Name Remarks
FHeader Header describing the encoded I/O chunk.

Constants

Name Type Remarks Include Path
DefaultBlockSize uint32   IO/IoChunkEncoding.h
ExpectedMagic uint32   IO/IoChunkEncoding.h
MaxBlockCount uint32   IO/IoChunkEncoding.h
MaxSize uint64   IO/IoChunkEncoding.h

Functions

Static

Name Remarks Include Path Unreal Specifiers

static bool Decode ( const FIoChunkDecodingParams& Params,
FMemoryView EncodedBlocks,
FMutableMemoryView OutRawData,
EIoDecodeFlags Flags
)

   IO/IoChunkEncoding.h  

static bool Decode ( FMemoryView EncodedData,
FName CompressionFormat,
FMemoryView EncryptionKey,
FMutableMemoryView OutRawData,
uint64 Offset
)

   IO/IoChunkEncoding.h  

static FIoChunkBlockDecodeResult DecodeBlock ( const FIoChunkBlockDecodingParams Params,
FMutableMemoryView EncodedBlock,
FMutableMemoryView OutDecodedBlock
)

 Decode a single I/O store chunk block. IO/IoChunkEncoding.h  

static bool Encode ( const FIoChunkEncodingParams& Params,
FMemoryView RawData,
FIoBuffer& OutEncodedData
)

   IO/IoChunkEncoding.h  

static bool Encode ( const FIoChunkEncodingParams& Params,
FMemoryView RawData,
FIoBuffer& OutHeader,
FIoBuffer& OutEncodedBlocks
)

   IO/IoChunkEncoding.h  

static TIoStatusOr< FIoOffsetAndLength > GetChunkRange ( const FIoChunkDecodingParams& Params,
uint64 RawSize
)

   IO/IoChunkEncoding.h  

static TIoStatusOr< FIoOffsetAndLength > GetChunkRange ( uint64 TotalRawSize,
uint32 RawBlockSize,
TConstArrayView< uint32 > EncodedBlockSize,
uint64 RawOffset,
uint64 RawSize
)

   IO/IoChunkEncoding.h  

static uint64 GetTotalEncodedSize ( TConstArrayView< uint32 > EncodedBlockSize
)

   IO/IoChunkEncoding.h  

static FIoBlockHash HashBlock ( FMemoryView Block
)

   IO/IoChunkEncoding.h  

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