o2::aod::native::PayloadDecompressor Class Reference

#include <Codecs.h>

Classes
struct	Codec

Public Member Functions
	PayloadDecompressor (std::span< const uint8_t > src, uint32_t objLen, std::string const &file, uint64_t fileOffset)
	~PayloadDecompressor ()
	PayloadDecompressor (PayloadDecompressor const &)=delete
PayloadDecompressor &	operator= (PayloadDecompressor const &)=delete
void	read (uint8_t *dst, size_t n)
void	readPrefix (uint8_t *dst, size_t n)
size_t	produced () const
	Bytes produced so far.

Detailed Description

Decompresses the chunks of a ROOT compressed payload incrementally into caller-provided memory. Each read() continues where the previous one stopped, so a caller can stop at the end of the value region without producing (or holding) the rest. Only LZ4 needs scratch memory, and only when a read ends in the middle of an LZ4 chunk.

Definition at line 30 of file Codecs.h.

Constructor & Destructor Documentation

PayloadDecompressor() [1/2]

o2::aod::native::PayloadDecompressor::PayloadDecompressor	(	std::span< const uint8_t >	src,
		uint32_t	objLen,
		std::string const &	file,
		uint64_t	fileOffset
	)

Definition at line 59 of file Codecs.cxx.

~PayloadDecompressor()

o2::aod::native::PayloadDecompressor::~PayloadDecompressor ( )

default

PayloadDecompressor() [2/2]

o2::aod::native::PayloadDecompressor::PayloadDecompressor ( PayloadDecompressor const &  )

delete

Member Function Documentation

operator=()

PayloadDecompressor & o2::aod::native::PayloadDecompressor::operator= ( PayloadDecompressor const &  )

delete

produced()

size_t o2::aod::native::PayloadDecompressor::produced ( ) const

inline

Bytes produced so far.

Definition at line 46 of file Codecs.h.

read()

void o2::aod::native::PayloadDecompressor::read	(	uint8_t *	dst,
		size_t	n
	)

Writes exactly n bytes to dst. Throws CorruptData if the payload ends first or contradicts its own headers.

Definition at line 289 of file Codecs.cxx.

readPrefix()

void o2::aod::native::PayloadDecompressor::readPrefix	(	uint8_t *	dst,
		size_t	n
	)

Writes the first n bytes of the payload to dst, as the only read. Since the output is contiguous and stays in place, zstd decodes into it without a window buffer of its own.

Definition at line 280 of file Codecs.cxx.

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The documentation for this class was generated from the following files:

• /home/runner/work/AliceO2/AliceO2/Framework/AODNative/include/AODNative/Codecs.h
• /home/runner/work/AliceO2/AliceO2/Framework/AODNative/src/Codecs.cxx