diff options
Diffstat (limited to '')
| -rw-r--r-- | src/common/data_compression.cpp | 24 | ||||
| -rw-r--r-- | src/common/data_compression.h | 8 |
2 files changed, 24 insertions, 8 deletions
diff --git a/src/common/data_compression.cpp b/src/common/data_compression.cpp index 624b8ac47..fdf4907d1 100644 --- a/src/common/data_compression.cpp +++ b/src/common/data_compression.cpp @@ -4,14 +4,14 @@ #pragma once -#include <lz4.h> +#include <lz4hc.h> #include "data_compression.h" namespace Compression { - -std::vector<u8> CompressDataLZ4(const u8* source, std::size_t source_size) { +std::vector<u8> CompressDataLZ4(const u8* source, std::size_t source_size, + bool use_LZ4_high_compression) { if (source_size > LZ4_MAX_INPUT_SIZE) { // Source size exceeds LZ4 maximum input size return {}; @@ -19,9 +19,18 @@ std::vector<u8> CompressDataLZ4(const u8* source, std::size_t source_size) { const auto source_size_int = static_cast<int>(source_size); const int max_compressed_size = LZ4_compressBound(source_size_int); std::vector<u8> compressed(max_compressed_size); - const int compressed_size = LZ4_compress_default(reinterpret_cast<const char*>(source), - reinterpret_cast<char*>(compressed.data()), - source_size_int, max_compressed_size); + int compressed_size = 0; + + if (use_LZ4_high_compression) { + compressed_size = LZ4_compress_HC(reinterpret_cast<const char*>(source), + reinterpret_cast<char*>(compressed.data()), + source_size_int, max_compressed_size, LZ4HC_CLEVEL_MAX); + } else { + compressed_size = LZ4_compress_default(reinterpret_cast<const char*>(source), + reinterpret_cast<char*>(compressed.data()), + source_size_int, max_compressed_size); + } + if (compressed_size <= 0) { // Compression failed return {}; @@ -30,7 +39,8 @@ std::vector<u8> CompressDataLZ4(const u8* source, std::size_t source_size) { return compressed; } -std::vector<u8> DecompressDataLZ4(const std::vector<u8>& compressed, std::size_t uncompressed_size) { +std::vector<u8> DecompressDataLZ4(const std::vector<u8>& compressed, + std::size_t uncompressed_size) { std::vector<u8> uncompressed(uncompressed_size); const int size_check = LZ4_decompress_safe(reinterpret_cast<const char*>(compressed.data()), reinterpret_cast<char*>(uncompressed.data()), diff --git a/src/common/data_compression.h b/src/common/data_compression.h index 70878b8d9..f7264b7b8 100644 --- a/src/common/data_compression.h +++ b/src/common/data_compression.h @@ -10,7 +10,13 @@ namespace Compression { -std::vector<u8> CompressDataLZ4(const u8* source, std::size_t source_size); +// Compresses a source memory region with LZ4 and returns the compressed data in an vector. If +// use_LZ4_high_compression is true, the LZ4 subalgortihmn LZ4HC is used with the highst possible +// compression level. This results in a smaller compressed size, but requires more CPU time for +// compression. Data compressed with LZ4HC can also be decompressed with the default LZ4 +// decompression function. +std::vector<u8> CompressDataLZ4(const u8* source, std::size_t source_size, + bool use_LZ4_high_compression); std::vector<u8> DecompressDataLZ4(const std::vector<u8>& compressed, std::size_t uncompressed_size); |