mirror of
https://github.com/yuzu-mirror/yuzu
synced 2024-12-21 08:03:05 +00:00
55 lines
2 KiB
C++
55 lines
2 KiB
C++
|
// Copyright 2019 yuzu Emulator Project
|
||
|
|
// Licensed under GPLv2 or any later version
|
||
|
|
// Refer to the license.txt file included.
|
||
|
|
|
||
|
|
#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 in bytes of the uncompressed source memory region.
|
||
|
|
*
|
||
|
|
* @return the compressed data.
|
||
|
|
*/
|
||
|
|
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 in bytes of the uncompressed source memory region.
|
||
|
|
* @param compression_level the used compression level. Should be between 3 and 12.
|
||
|
|
*
|
||
|
|
* @return the compressed data.
|
||
|
|
*/
|
||
|
|
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 in bytes of the uncompressed source memory region.
|
||
|
|
*
|
||
|
|
* @return the compressed data.
|
||
|
|
*/
|
||
|
|
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.
|
||
|
|
*/
|
||
|
|
std::vector<u8> DecompressDataLZ4(const std::vector<u8>& compressed, std::size_t uncompressed_size);
|
||
|
|
|
||
|
|
} // namespace Common::Compression
|