yuzu-android/src/common/zstd_compression.cpp
Morph 99ceb03a1c general: Convert source file copyright comments over to SPDX
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.
2022-04-23 05:55:32 -04:00

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1.6 KiB
C++

// 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_getDecompressedSize(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