diff --git a/src/common/CMakeLists.txt b/src/common/CMakeLists.txt index b1c3b9b52..1e8e1b215 100644 --- a/src/common/CMakeLists.txt +++ b/src/common/CMakeLists.txt @@ -125,6 +125,8 @@ add_library(common STATIC uint128.h vector_math.h web_result.h + zstd_compression.cpp + zstd_compression.h ) if(ARCHITECTURE_x86_64) diff --git a/src/common/zstd_compression.cpp b/src/common/zstd_compression.cpp new file mode 100644 index 000000000..f6cf7a791 --- /dev/null +++ b/src/common/zstd_compression.cpp @@ -0,0 +1,52 @@ +// Copyright 2019 yuzu Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#pragma once + +#include +#include + +#include "common/assert.h" +#include "common/zstd_compression.h" + +namespace Common::Compression { + +std::vector CompressDataZSTD(const u8* source, std::size_t source_size, s32 compression_level) { + + compression_level = std::clamp(compression_level, 1, ZSTD_maxCLevel()); + + const std::size_t max_compressed_size = ZSTD_compressBound(source_size); + std::vector compressed(max_compressed_size); + + const std::size_t compressed_size = + ZSTD_compress(compressed.data(), compressed.size(), source, source_size, compression_level); + + if (ZSTD_isError(compressed_size)) { + // Compression failed + return {}; + } + + compressed.resize(compressed_size); + + return compressed; +} + +std::vector CompressDataZSTDDefault(const u8* source, std::size_t source_size) { + return CompressDataZSTD(source, source_size, ZSTD_CLEVEL_DEFAULT); +} + +std::vector DecompressDataZSTD(const std::vector& compressed, + std::size_t uncompressed_size) { + std::vector uncompressed(uncompressed_size); + const std::size_t uncompressed_result_size = ZSTD_decompress( + uncompressed.data(), uncompressed.size(), compressed.data(), compressed.size()); + + if (uncompressed_size != uncompressed_result_size || ZSTD_isError(uncompressed_result_size)) { + // Decompression failed + return {}; + } + return uncompressed; +} + +} // namespace Common::Compression diff --git a/src/common/zstd_compression.h b/src/common/zstd_compression.h new file mode 100644 index 000000000..c011ac34b --- /dev/null +++ b/src/common/zstd_compression.h @@ -0,0 +1,44 @@ +// Copyright 2019 yuzu Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#include + +#include "common/common_types.h" + +namespace Common::Compression { + +/** + * Compresses a source memory region with Zstandard 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. + * @param compression_level the used compression level. Should be between 1 and 22. + * + * @return the compressed data. + */ +std::vector CompressDataZSTD(const u8* source, std::size_t source_size, s32 compression_level); + +/** + * Compresses a source memory region with Zstandard with the default compression level 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 CompressDataZSTDDefault(const u8* source, std::size_t source_size); + +/** + * Decompresses a source memory region with Zstandard 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 DecompressDataZSTD(const std::vector& compressed, + std::size_t uncompressed_size); + +} // namespace Common::Compression \ No newline at end of file