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| author | Ferenc Arn <tagcup@yahoo.com> | 2017-10-26 16:42:02 -0400 |
|---|---|---|
| committer | Ferenc Arn <tagcup@yahoo.com> | 2017-10-27 12:26:13 -0400 |
| commit | f3436a841a3b59fc3a9deb94d5fdfd1e550d0351 (patch) | |
| tree | 5fb9a624e5072fcb8b7a4189dcddcf370ed263cf /core/io/compression.cpp | |
| parent | 01815e9b5f1ec97d0018ee843a07fa73f450f1bf (diff) | |
| download | redot-engine-f3436a841a3b59fc3a9deb94d5fdfd1e550d0351.tar.gz | |
Add an option to use zstd's recently introduced long range matching (off by default).
Diffstat (limited to 'core/io/compression.cpp')
| -rw-r--r-- | core/io/compression.cpp | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/core/io/compression.cpp b/core/io/compression.cpp index fbe97e54c7..51d48901cf 100644 --- a/core/io/compression.cpp +++ b/core/io/compression.cpp @@ -78,9 +78,16 @@ int Compression::compress(uint8_t *p_dst, const uint8_t *p_src, int p_src_size, } break; case MODE_ZSTD: { - + ZSTD_CCtx *cctx = ZSTD_createCCtx(); + ZSTD_CCtx_setParameter(cctx, ZSTD_p_compressionLevel, zstd_level); + if (zstd_long_distance_matching) { + ZSTD_CCtx_setParameter(cctx, ZSTD_p_enableLongDistanceMatching, 1); + ZSTD_CCtx_setParameter(cctx, ZSTD_p_windowLog, zstd_window_log_size); + } int max_dst_size = get_max_compressed_buffer_size(p_src_size, MODE_ZSTD); - return ZSTD_compress(p_dst, max_dst_size, p_src, p_src_size, zstd_level); + int ret = ZSTD_compressCCtx(cctx, p_dst, max_dst_size, p_src, p_src_size, zstd_level); + ZSTD_freeCCtx(cctx); + return ret; } break; } @@ -165,8 +172,11 @@ int Compression::decompress(uint8_t *p_dst, int p_dst_max_size, const uint8_t *p return total; } break; case MODE_ZSTD: { - - return ZSTD_decompress(p_dst, p_dst_max_size, p_src, p_src_size); + ZSTD_DCtx *dctx = ZSTD_createDCtx(); + if (zstd_long_distance_matching) ZSTD_DCtx_setMaxWindowSize(dctx, 1 << zstd_window_log_size); + int ret = ZSTD_decompressDCtx(dctx, p_dst, p_dst_max_size, p_src, p_src_size); + ZSTD_freeDCtx(dctx); + return ret; } break; } @@ -176,3 +186,5 @@ int Compression::decompress(uint8_t *p_dst, int p_dst_max_size, const uint8_t *p int Compression::zlib_level = Z_DEFAULT_COMPRESSION; int Compression::gzip_level = Z_DEFAULT_COMPRESSION; int Compression::zstd_level = 3; +bool Compression::zstd_long_distance_matching = false; +int Compression::zstd_window_log_size = 27; |