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common/zstd_compression: Add Zstandard wrapper
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@ -125,6 +125,8 @@ add_library(common STATIC
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uint128.h
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vector_math.h
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web_result.h
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zstd_compression.cpp
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zstd_compression.h
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)
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if(ARCHITECTURE_x86_64)
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52
src/common/zstd_compression.cpp
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52
src/common/zstd_compression.cpp
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@ -0,0 +1,52 @@
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// Copyright 2019 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include <algorithm>
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#include <zstd.h>
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#include "common/assert.h"
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#include "common/zstd_compression.h"
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namespace Common::Compression {
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std::vector<u8> CompressDataZSTD(const u8* source, std::size_t source_size, s32 compression_level) {
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compression_level = std::clamp(compression_level, 1, ZSTD_maxCLevel());
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const std::size_t max_compressed_size = ZSTD_compressBound(source_size);
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std::vector<u8> compressed(max_compressed_size);
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const std::size_t compressed_size =
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ZSTD_compress(compressed.data(), compressed.size(), source, source_size, compression_level);
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if (ZSTD_isError(compressed_size)) {
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// Compression failed
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return {};
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}
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compressed.resize(compressed_size);
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return compressed;
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}
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std::vector<u8> CompressDataZSTDDefault(const u8* source, std::size_t source_size) {
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return CompressDataZSTD(source, source_size, ZSTD_CLEVEL_DEFAULT);
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}
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std::vector<u8> DecompressDataZSTD(const std::vector<u8>& compressed,
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std::size_t uncompressed_size) {
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std::vector<u8> uncompressed(uncompressed_size);
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const std::size_t uncompressed_result_size = ZSTD_decompress(
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uncompressed.data(), uncompressed.size(), compressed.data(), compressed.size());
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if (uncompressed_size != uncompressed_result_size || ZSTD_isError(uncompressed_result_size)) {
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// Decompression failed
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return {};
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}
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return uncompressed;
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}
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} // namespace Common::Compression
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src/common/zstd_compression.h
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src/common/zstd_compression.h
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@ -0,0 +1,44 @@
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// Copyright 2019 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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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 Zstandard 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 in bytes of the uncompressed source memory region.
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* @param compression_level the used compression level. Should be between 1 and 22.
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*
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* @return the compressed data.
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*/
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std::vector<u8> CompressDataZSTD(const u8* source, std::size_t source_size, s32 compression_level);
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/**
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* Compresses a source memory region with Zstandard with the default compression level and returns
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* 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 in bytes 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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std::vector<u8> CompressDataZSTDDefault(const u8* source, std::size_t source_size);
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/**
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* Decompresses a source memory region with Zstandard 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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std::vector<u8> DecompressDataZSTD(const std::vector<u8>& compressed,
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std::size_t uncompressed_size);
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} // namespace Common::Compression
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