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support compression levels in prs

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This commit is contained in:
Martin Michelsen
2023-05-27 13:39:57 -07:00
parent 54a734e049
commit afd93047c1
3 changed files with 224 additions and 114 deletions
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src/Main.cc
+10 -2
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@@ -98,7 +98,12 @@ The actions are:\n\
decompress-prs [INPUT-FILENAME [OUTPUT-FILENAME]]\n\
compress-bc0 [INPUT-FILENAME [OUTPUT-FILENAME]]\n\
decompress-bc0 [INPUT-FILENAME [OUTPUT-FILENAME]]\n\
Compress or decompress data using the PRS or BC0 algorithms.\n\
Compress or decompress data using the PRS or BC0 algorithms. When\n\
compressing with PRS, the --compression-level=N option (default 1)\n\
specifies how aggressive the compressor should be in searching for literal\n\
sequences. A higher value generally means slower compression and a smaller\n\
output size. If 0 is given, the data is PRS-encoded but not actually\n\
compressed, resulting in valid PRS data which is larger than the input.\n\
prs-size [INPUT-FILENAME]\n\
Compute the decompressed size of the PRS-compressed input data, but don\'t\n\
write the decompressed data anywhere.\n\
@@ -292,6 +297,7 @@ int main(int argc, char** argv) {
size_t stride = 1;
size_t num_threads = 0;
size_t bytes = 0;
size_t prs_compression_level = 1;
const char* find_decryption_seed_ciphertext = nullptr;
vector<const char*> find_decryption_seed_plaintexts;
const char* input_filename = nullptr;
@@ -321,6 +327,8 @@ int main(int argc, char** argv) {
cli_version = GameVersion::XB;
} else if (!strcmp(argv[x], "--bb")) {
cli_version = GameVersion::BB;
} else if (!strncmp(argv[x], "--compression-level=", 20)) {
prs_compression_level = strtoull(&argv[x][20], nullptr, 0);
} else if (!strcmp(argv[x], "--round2")) {
round2 = true;
} else if (!strncmp(argv[x], "--bytes=", 8)) {
@@ -531,7 +539,7 @@ int main(int argc, char** argv) {
uint64_t start = now();
if (behavior == Behavior::COMPRESS_PRS) {
data = prs_compress(data, progress_fn);
data = prs_compress(data, prs_compression_level, progress_fn);
} else if (behavior == Behavior::DECOMPRESS_PRS) {
data = prs_decompress(data);
} else if (behavior == Behavior::COMPRESS_BC0) {