71 lines
2.7 KiB
C++
71 lines
2.7 KiB
C++
#include "stdafx.h"
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#include "iNesLoader.h"
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#include "../Utilities/CRC32.h"
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#include "GameDatabase.h"
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#include "EmulationSettings.h"
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RomData iNesLoader::LoadRom(vector<uint8_t>& romFile)
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{
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RomData romData;
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uint8_t* buffer = romFile.data();
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NESHeader header;
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memcpy((char*)&header, buffer, sizeof(NESHeader));
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buffer += sizeof(NESHeader);
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header.SanitizeHeader(romFile.size());
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romData.IsNes20Header = (header.GetRomHeaderVersion() == RomHeaderVersion::Nes2_0);
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romData.MapperID = header.GetMapperID();
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romData.SubMapperID = header.GetSubMapper();
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romData.MirroringType = header.GetMirroringType();
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romData.HasBattery = header.HasBattery();
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if(header.IsPalRom()) {
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romData.System = GameSystem::NesPal;
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} else if(header.IsVsSystem()) {
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romData.System = GameSystem::VsUniSystem;
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} else if(header.IsPlaychoice()) {
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romData.System = GameSystem::Playchoice;
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}
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romData.HasTrainer = header.HasTrainer();
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romData.ChrRamSize = header.GetChrRamSize();
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romData.NesHeader = header;
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if(romData.HasTrainer) {
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//512-byte trainer at $7000-$71FF (stored before PRG data)
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romData.TrainerData.insert(romData.TrainerData.end(), buffer, buffer + 512);
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buffer += 512;
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}
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uint32_t romCrc = CRC32::GetCRC(buffer, header.GetPrgSize() + header.GetChrSize());
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romData.PrgRom.insert(romData.PrgRom.end(), buffer, buffer + header.GetPrgSize());
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buffer += header.GetPrgSize();
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romData.ChrRom.insert(romData.ChrRom.end(), buffer, buffer + header.GetChrSize());
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stringstream crcHex;
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crcHex << std::hex << std::uppercase << std::setfill('0') << std::setw(8) << romCrc;
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MessageManager::Log("PRG+CHR CRC32: 0x" + crcHex.str());
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if(romData.IsNes20Header) {
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MessageManager::Log("[iNes] NES 2.0 file: Yes");
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}
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MessageManager::Log("[iNes] Mapper: " + std::to_string(romData.MapperID) + " Sub:" + std::to_string(romData.SubMapperID));
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MessageManager::Log("[iNes] PRG ROM: " + std::to_string(romData.PrgRom.size()/1024) + " KB");
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MessageManager::Log("[iNes] CHR ROM: " + std::to_string(romData.ChrRom.size()/1024) + " KB");
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if(romData.ChrRamSize > 0) {
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MessageManager::Log("[iNes] CHR RAM: " + std::to_string(romData.ChrRamSize) + " KB");
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} else if(romData.ChrRom.size() == 0) {
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MessageManager::Log("[iNes] CHR RAM: 8 KB");
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}
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MessageManager::Log("[iNes] Mirroring: " + string(romData.MirroringType == MirroringType::Horizontal ? "Horizontal" : romData.MirroringType == MirroringType::Vertical ? "Vertical" : "Four Screens"));
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MessageManager::Log("[iNes] Battery: " + string(romData.HasBattery ? "Yes" : "No"));
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if(romData.HasTrainer) {
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MessageManager::Log("[iNes] Trainer: Yes");
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}
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if(!EmulationSettings::CheckFlag(EmulationFlags::DisableGameDatabase) && header.GetRomHeaderVersion() != RomHeaderVersion::Nes2_0) {
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GameDatabase::UpdateRomData(romCrc, romData);
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}
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return romData;
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}
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