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  3. FIoChunkEncoding

FIoChunkEncoding

Encodes data into a set of encrypted and compressed blocks.

Unreal Engine C++ API Reference > Runtime > Core > IO

References

   
Module Core
Header /Engine/Source/Runtime/Core/Public/IO/IoChunkEncoding.h
Include #include "IO/IoChunkEncoding.h"

Syntax

class FIoChunkEncoding

Remarks

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.

Functions

  Type Name Description
Public function Static bool

Decode ( const FIoChunkDecodingParams& Params,
FMemoryView EncodedBlocks,
FMutableMemoryView OutRawData
)

  
Public function Static bool

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

  
Public function Static bool

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

  
Public function Static bool

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

  
Public function Static TIoStatusOr< FIoOffsetAndLength >

GetChunkRange ( const FIoChunkDecodingParams& Params,
uint64 RawSize
)

  
Public function Static TIoStatusOr< FIoOffsetAndLength >

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

  
Public function Static uint64

GetTotalEncodedSize ( TConstArrayView< uint32 > EncodedBlockSize
)

  
Public function Static FIoStatus

HashBlocks ( const FHeader& Header,
FMemoryView EncodedData,
TArray< FIoHash >& OutHashes
)

  

Classes

  Type Name Description
Public struct FHeader Header describing the encoded I/O chunk.  

Constants

Name Description
DefaultBlockSize  
ExpectedMagic  
MaxBlockCount  
MaxSize  

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