quickerNES/source/quickNES/quickNESInstance.hpp

91 lines
2.4 KiB
C++

#pragma once
#include <Nes_Emu.h>
#include <Nes_State.h>
#include <emuInstance.hpp>
#define _DUMMY_SIZE 65536
extern void register_misc_mappers();
extern void register_extra_mappers();
extern void register_mapper_70();
class QuickNESInstance : public EmuInstance
{
public:
QuickNESInstance() : EmuInstance()
{
// Creating new emulator
_nes = new Nes_Emu;
// Allocating video buffer
video_buffer = (uint8_t *)malloc(image_width * image_height);
// Setting video buffer
_nes->set_pixels(video_buffer, image_width + 8);
// If running the original QuickNES, register extra mappers now
register_misc_mappers();
register_extra_mappers();
register_mapper_70();
}
virtual bool loadROMFileImpl(const std::string &romData) override
{
// Loading rom data
Mem_File_Reader romReader(romData.data(), (int)romData.size());
Auto_File_Reader romFile(romReader);
auto result = _nes->load_ines(romFile);
return result == 0;
}
uint8_t *getLowMem() const override { return _nes->low_mem(); };
uint8_t *getNametableMem() const override { return _nes->nametable_mem(); };
uint8_t *getHighMem() const override { return _nes->high_mem(); };
const uint8_t *getChrMem() const override { return _nes->chr_mem(); };
size_t getChrMemSize() const override { return _nes->chr_size(); };
void serializeState(uint8_t *state) const override
{
Mem_Writer w(state, _stateSize, 0);
Auto_File_Writer a(w);
_nes->save_state(a);
}
void deserializeState(const uint8_t *state) override
{
Mem_File_Reader r(state, _stateSize);
Auto_File_Reader a(r);
_nes->load_state(a);
}
void advanceStateImpl(const inputType controller1, const inputType controller2) override
{
if (_doRendering == true) _nes->emulate_frame(controller1, controller2);
if (_doRendering == false) _nes->emulate_skip_frame(controller1, controller2);
}
std::string getCoreName() const override { return "QuickNES"; }
void doSoftReset() override { _nes->reset(false); }
void doHardReset() override { _nes->reset(true); }
void *getInternalEmulatorPointer() const override { return _nes; }
private:
inline size_t getStateSizeImpl() const override
{
uint8_t *data = (uint8_t *)malloc(_DUMMY_SIZE);
Mem_Writer w(data, _DUMMY_SIZE);
Auto_File_Writer a(w);
_nes->save_state(a);
free(data);
return w.size();
}
// Video buffer
uint8_t *video_buffer;
// Emulator instance
Nes_Emu *_nes;
};