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add download quest conversion function

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This commit is contained in:
Martin Michelsen
2018-11-10 19:55:38 -08:00
parent 861d29fba5
commit 05d74ce496
4 changed files with 189 additions and 4 deletions
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Quest.cc
+78 -3
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@@ -6,6 +6,7 @@
#include <phosg/Strings.hh>
#include "Compression.hh"
#include "PSOEncryption.hh"
#include "Text.hh"
using namespace std;
@@ -56,8 +57,8 @@ struct PSOQuestHeaderDC { // same for dc v1 and v2, thankfully
uint32_t unknown_offset1;
uint32_t size;
uint32_t unused;
uint8_t is_download;
uint8_t unknown1;
uint8_t unknown2;
uint16_t quest_number; // 0xFFFF for challenge quests
char name[0x20];
char short_description[0x80];
@@ -69,8 +70,8 @@ struct PSOQuestHeaderPC {
uint32_t unknown_offset1;
uint32_t size;
uint32_t unused;
uint8_t is_download;
uint8_t unknown1;
uint8_t unknown2;
uint16_t quest_number; // 0xFFFF for challenge quests
char16_t name[0x20];
char16_t short_description[0x80];
@@ -82,7 +83,8 @@ struct PSOQuestHeaderGC {
uint32_t unknown_offset1;
uint32_t size;
uint32_t unused;
uint16_t unknown1;
uint8_t is_download;
uint8_t unknown1;
uint8_t quest_number;
uint8_t episode; // 1 = ep2. apparently some quests have 0xFF here, which means ep1 (?)
char name[0x20];
@@ -362,3 +364,76 @@ vector<shared_ptr<const Quest>> QuestIndex::filter(GameVersion version,
return ret;
}
static string create_download_quest_file(const string& compressed_data,
size_t decompressed_size) {
struct PSODownloadQuestHeader {
uint32_t decompressed_size;
uint32_t encryption_seed; // note: use PC encryption, even for GC quests
};
string data(8, '\0');
auto* header = reinterpret_cast<PSODownloadQuestHeader*>(const_cast<char*>(
compressed_data.data()));
header->decompressed_size = decompressed_size + sizeof(PSODownloadQuestHeader);
header->encryption_seed = random_object<uint32_t>();
data += compressed_data;
// add extra bytes if necessary so encryption won't fail
data.resize((data.size() + 3) & (~3));
// TODO: for DC quests, do we use DC encryption?
PSOPCEncryption encr(header->encryption_seed);
encr.encrypt(const_cast<char*>(data.data() + sizeof(PSODownloadQuestHeader)),
data.size() - sizeof(PSODownloadQuestHeader));
return data;
}
shared_ptr<Quest> Quest::create_download_quest(const string& file_basename) const {
if (this->category == QuestCategory::Download) {
throw invalid_argument("quest is already a download quest");
}
string decompressed_bin = prs_decompress(*this->bin_contents());
void* data_ptr = const_cast<char*>(decompressed_bin.data());
switch (this->version) {
case GameVersion::DC:
reinterpret_cast<PSOQuestHeaderDC*>(data_ptr)->is_download = 0x01;
break;
case GameVersion::PC:
reinterpret_cast<PSOQuestHeaderDC*>(data_ptr)->is_download = 0x01;
break;
case GameVersion::GC:
reinterpret_cast<PSOQuestHeaderDC*>(data_ptr)->is_download = 0x01;
break;
case GameVersion::BB:
throw invalid_argument("PSOBB does not support download quests");
default:
throw invalid_argument("unknown game version");
}
shared_ptr<Quest> dlq(new Quest(file_basename));
dlq->quest_id = this->quest_id;
dlq->category = QuestCategory::Download;
dlq->episode = this->episode;
dlq->is_dcv1 = this->is_dcv1;
dlq->joinable = this->joinable;
dlq->version = this->version;
dlq->name = this->name;
dlq->short_description = this->short_description;
dlq->long_description = this->long_description;
dlq->bin_contents_ptr.reset(new string(create_download_quest_file(
prs_compress(decompressed_bin), decompressed_bin.size())));
auto dat_contents = this->dat_contents();
dlq->dat_contents_ptr.reset(new string(create_download_quest_file(
*dat_contents, prs_decompress_size(*dat_contents))));
save_file(dlq->bin_filename(), *dlq->bin_contents_ptr);
save_file(dlq->dat_filename(), *dlq->dat_contents_ptr);
return dlq;
}