1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
// Copyright 2019 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include <zstd.h>
#include "common/logging/log.h"
#include "common/zstd_compression.h"
namespace Common::Compression {
std::vector<u8> CompressDataZSTD(std::span<const u8> source, s32 compression_level) {
compression_level = std::clamp(compression_level, ZSTD_minCLevel(), ZSTD_maxCLevel());
const std::size_t max_compressed_size = ZSTD_compressBound(source.size());
if (ZSTD_isError(max_compressed_size)) {
LOG_ERROR(Common, "Error determining ZSTD maximum compressed size: {} ({})",
ZSTD_getErrorName(max_compressed_size), max_compressed_size);
return {};
}
std::vector<u8> compressed(max_compressed_size);
const std::size_t compressed_size = ZSTD_compress(
compressed.data(), compressed.size(), source.data(), source.size(), compression_level);
if (ZSTD_isError(compressed_size)) {
LOG_ERROR(Common, "Error compressing ZSTD data: {} ({})",
ZSTD_getErrorName(compressed_size), compressed_size);
return {};
}
compressed.resize(compressed_size);
return compressed;
}
std::vector<u8> CompressDataZSTDDefault(std::span<const u8> source) {
return CompressDataZSTD(source, ZSTD_CLEVEL_DEFAULT);
}
std::vector<u8> DecompressDataZSTD(std::span<const u8> compressed) {
const std::size_t decompressed_size =
ZSTD_getFrameContentSize(compressed.data(), compressed.size());
if (decompressed_size == ZSTD_CONTENTSIZE_UNKNOWN) {
LOG_ERROR(Common, "ZSTD decompressed size could not be determined.");
return {};
}
if (decompressed_size == ZSTD_CONTENTSIZE_ERROR || ZSTD_isError(decompressed_size)) {
LOG_ERROR(Common, "Error determining ZSTD decompressed size: {} ({})",
ZSTD_getErrorName(decompressed_size), decompressed_size);
return {};
}
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) {
LOG_ERROR(Common, "ZSTD decompression expected {} bytes, got {}", decompressed_size,
uncompressed_result_size);
return {};
}
if (ZSTD_isError(uncompressed_result_size)) {
LOG_ERROR(Common, "Error decompressing ZSTD data: {} ({})",
ZSTD_getErrorName(uncompressed_result_size), uncompressed_result_size);
return {};
}
return decompressed;
}
} // namespace Common::Compression
|
