49 lines
1.6 KiB
C++
49 lines
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_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
|