99ceb03a1c
This formats all copyright comments according to SPDX formatting guidelines. Additionally, this resolves the remaining GPLv2 only licensed files by relicensing them to GPLv2.0-or-later.
60 lines
2.2 KiB
C++
60 lines
2.2 KiB
C++
// SPDX-FileCopyrightText: Copyright 2019 yuzu Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#pragma once
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#include <span>
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#include <vector>
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#include "common/common_types.h"
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namespace Common::Compression {
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/**
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* Compresses a source memory region with LZ4 and returns the compressed data in a vector.
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*
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* @param source The uncompressed source memory region.
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* @param source_size The size of the uncompressed source memory region.
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*
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* @return the compressed data.
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*/
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[[nodiscard]] std::vector<u8> CompressDataLZ4(const u8* source, std::size_t source_size);
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/**
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* Utilizes the LZ4 subalgorithm LZ4HC with the specified compression level. Higher compression
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* levels result in a smaller compressed size, but require more CPU time for compression. The
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* compression level has almost no impact on decompression speed. Data compressed with LZ4HC can
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* also be decompressed with the default LZ4 decompression.
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*
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* @param source The uncompressed source memory region.
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* @param source_size The size of the uncompressed source memory region.
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* @param compression_level The used compression level. Should be between 3 and 12.
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*
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* @return the compressed data.
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*/
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[[nodiscard]] std::vector<u8> CompressDataLZ4HC(const u8* source, std::size_t source_size,
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s32 compression_level);
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/**
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* Utilizes the LZ4 subalgorithm LZ4HC with the highest possible compression level.
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*
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* @param source The uncompressed source memory region.
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* @param source_size The size of the uncompressed source memory region
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*
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* @return the compressed data.
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*/
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[[nodiscard]] std::vector<u8> CompressDataLZ4HCMax(const u8* source, std::size_t source_size);
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/**
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* Decompresses a source memory region with LZ4 and returns the uncompressed data in a vector.
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*
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* @param compressed the compressed source memory region.
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* @param uncompressed_size the size in bytes of the uncompressed data.
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*
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* @return the decompressed data.
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*/
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[[nodiscard]] std::vector<u8> DecompressDataLZ4(std::span<const u8> compressed,
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std::size_t uncompressed_size);
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} // namespace Common::Compression
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