60 lines
2.2 KiB
C++
60 lines
2.2 KiB
C++
// Copyright 2019 yuzu Emulator Project
|
|
// Licensed under GPLv2 or any later version
|
|
// Refer to the license.txt file included.
|
|
|
|
#pragma once
|
|
|
|
#include <span>
|
|
#include <vector>
|
|
|
|
#include "common/common_types.h"
|
|
|
|
namespace Common::Compression {
|
|
|
|
/**
|
|
* Compresses a source memory region with LZ4 and returns the compressed data in a vector.
|
|
*
|
|
* @param source The uncompressed source memory region.
|
|
* @param source_size The size of the uncompressed source memory region.
|
|
*
|
|
* @return the compressed data.
|
|
*/
|
|
[[nodiscard]] std::vector<u8> CompressDataLZ4(const u8* source, std::size_t source_size);
|
|
|
|
/**
|
|
* Utilizes the LZ4 subalgorithm LZ4HC with the specified compression level. Higher compression
|
|
* levels result in a smaller compressed size, but require more CPU time for compression. The
|
|
* compression level has almost no impact on decompression speed. Data compressed with LZ4HC can
|
|
* also be decompressed with the default LZ4 decompression.
|
|
*
|
|
* @param source The uncompressed source memory region.
|
|
* @param source_size The size of the uncompressed source memory region.
|
|
* @param compression_level The used compression level. Should be between 3 and 12.
|
|
*
|
|
* @return the compressed data.
|
|
*/
|
|
[[nodiscard]] std::vector<u8> CompressDataLZ4HC(const u8* source, std::size_t source_size,
|
|
s32 compression_level);
|
|
|
|
/**
|
|
* Utilizes the LZ4 subalgorithm LZ4HC with the highest possible compression level.
|
|
*
|
|
* @param source The uncompressed source memory region.
|
|
* @param source_size The size of the uncompressed source memory region
|
|
*
|
|
* @return the compressed data.
|
|
*/
|
|
[[nodiscard]] std::vector<u8> CompressDataLZ4HCMax(const u8* source, std::size_t source_size);
|
|
|
|
/**
|
|
* Decompresses a source memory region with LZ4 and returns the uncompressed data in a vector.
|
|
*
|
|
* @param compressed the compressed source memory region.
|
|
* @param uncompressed_size the size in bytes of the uncompressed data.
|
|
*
|
|
* @return the decompressed data.
|
|
*/
|
|
[[nodiscard]] std::vector<u8> DecompressDataLZ4(std::span<const u8> compressed,
|
|
std::size_t uncompressed_size);
|
|
|
|
} // namespace Common::Compression
|