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src/common/zstd_compression.cpp
49 строк
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zstd: Use ZSTD_getFrameContentSize instead of ZSTD_getDecompressedSize
24 мар 2023, 05:16
24 мар 2023, 05:16
abe2ad7
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// SPDX-FileCopyrightText: Copyright 2019 yuzu Emulator Project // SPDX-License-Identifier: GPL-2.0-or-later #include <algorithm> #include <zstd.h> #include "common/zstd_compression.h" namespace Common::Compression { std::vector<u8> 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<u8> 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<u8> CompressDataZSTDDefault(const u8* source, std::size_t source_size) { return CompressDataZSTD(source, source_size, ZSTD_CLEVEL_DEFAULT); } std::vector<u8> DecompressDataZSTD(std::span<const u8> compressed) { const std::size_t decompressed_size = ZSTD_getFrameContentSize(compressed.data(), compressed.size()); std::vector<u8> decompressed(decompressed_size); const std::size_t uncompressed_result_size = ZSTD_decompress( decompressed.data(), decompressed.size(), compressed.data(), compressed.size()); if (decompressed_size != uncompressed_result_size || ZSTD_isError(uncompressed_result_size)) { // Decompression failed return {}; } return decompressed; } } // namespace Common::Compression