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authorunknown <FreddyFunk@users.noreply.github.com>2019-02-08 23:11:00 +0100
committerFreddyFunk <FreddyFunk@users.noreply.github.com>2019-03-29 18:22:08 +0100
commit72477731ed20c56a4d6f18a22f43224fab667cef (patch)
treeb42e73051351850148cbffe65c528c0adfff62af /src
parentcommon: Link libzstd_static (diff)
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-rw-r--r--src/common/CMakeLists.txt2
-rw-r--r--src/common/zstd_compression.cpp52
-rw-r--r--src/common/zstd_compression.h44
3 files changed, 98 insertions, 0 deletions
diff --git a/src/common/CMakeLists.txt b/src/common/CMakeLists.txt
index b1c3b9b52..1e8e1b215 100644
--- a/src/common/CMakeLists.txt
+++ b/src/common/CMakeLists.txt
@@ -125,6 +125,8 @@ add_library(common STATIC
uint128.h
vector_math.h
web_result.h
+ zstd_compression.cpp
+ zstd_compression.h
)
if(ARCHITECTURE_x86_64)
diff --git a/src/common/zstd_compression.cpp b/src/common/zstd_compression.cpp
new file mode 100644
index 000000000..f6cf7a791
--- /dev/null
+++ b/src/common/zstd_compression.cpp
@@ -0,0 +1,52 @@
+// Copyright 2019 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <algorithm>
+#include <zstd.h>
+
+#include "common/assert.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(const std::vector<u8>& compressed,
+ std::size_t uncompressed_size) {
+ std::vector<u8> uncompressed(uncompressed_size);
+ const std::size_t uncompressed_result_size = ZSTD_decompress(
+ uncompressed.data(), uncompressed.size(), compressed.data(), compressed.size());
+
+ if (uncompressed_size != uncompressed_result_size || ZSTD_isError(uncompressed_result_size)) {
+ // Decompression failed
+ return {};
+ }
+ return uncompressed;
+}
+
+} // namespace Common::Compression
diff --git a/src/common/zstd_compression.h b/src/common/zstd_compression.h
new file mode 100644
index 000000000..c011ac34b
--- /dev/null
+++ b/src/common/zstd_compression.h
@@ -0,0 +1,44 @@
+// Copyright 2019 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <vector>
+
+#include "common/common_types.h"
+
+namespace Common::Compression {
+
+/**
+ * Compresses a source memory region with Zstandard and returns the compressed data in a vector.
+ *
+ * @param source the uncompressed source memory region.
+ * @param source_size the size in bytes of the uncompressed source memory region.
+ * @param compression_level the used compression level. Should be between 1 and 22.
+ *
+ * @return the compressed data.
+ */
+std::vector<u8> CompressDataZSTD(const u8* source, std::size_t source_size, s32 compression_level);
+
+/**
+ * Compresses a source memory region with Zstandard with the default compression level and returns
+ * the compressed data in a vector.
+ *
+ * @param source the uncompressed source memory region.
+ * @param source_size the size in bytes of the uncompressed source memory region.
+ *
+ * @return the compressed data.
+ */
+std::vector<u8> CompressDataZSTDDefault(const u8* source, std::size_t source_size);
+
+/**
+ * Decompresses a source memory region with Zstandard and returns the uncompressed data in a vector.
+ *
+ * @param compressed the compressed source memory region.
+ * @param uncompressed_size the size in bytes of the uncompressed data.
+ *
+ * @return the decompressed data.
+ */
+std::vector<u8> DecompressDataZSTD(const std::vector<u8>& compressed,
+ std::size_t uncompressed_size);
+
+} // namespace Common::Compression \ No newline at end of file