Mesen2/Core/SNES/SnesControlManager.cpp

#include "pch.h"
#include "SNES/SnesControlManager.h"
#include "SNES/SnesConsole.h"
#include "SNES/SnesMemoryManager.h"
#include "SNES/InternalRegisters.h"
#include "Shared/Emulator.h"
#include "Shared/EmuSettings.h"
#include "Shared/KeyManager.h"
#include "Shared/Interfaces/IKeyManager.h"
#include "Shared/Interfaces/IInputProvider.h"
#include "Shared/Interfaces/IInputRecorder.h"
#include "SNES/Input/SnesController.h"
#include "SNES/Input/SnesMouse.h"
#include "SNES/Input/Multitap.h"
#include "SNES/Input/SuperScope.h"
#include "Shared/EventType.h"
#include "Utilities/Serializer.h"
#include "Shared/SystemActionManager.h"

SnesControlManager::SnesControlManager(SnesConsole* console) : BaseControlManager(console->GetEmulator(), CpuType::Snes)
{
	_console = console;
	UpdateControlDevices();
}

SnesControlManager::~SnesControlManager()
{
}

void SnesControlManager::Reset(bool softReset)
{
	_lastWriteValue = 0;
}

shared_ptr<BaseControlDevice> SnesControlManager::CreateControllerDevice(ControllerType type, uint8_t port)
{
	shared_ptr<BaseControlDevice> device;

	SnesConfig& cfg = _emu->GetSettings()->GetSnesConfig();

	switch(type) {
		default:
		case ControllerType::None: break;

		case ControllerType::SnesController:
			device.reset(new SnesController(_emu, port, port == 0 ? cfg.Port1.Keys : cfg.Port2.Keys));
			break;

		case ControllerType::SnesMouse: device.reset(new SnesMouse(_emu, port, port == 0 ? cfg.Port1.Keys : cfg.Port2.Keys)); break;

		case ControllerType::SuperScope: device.reset(new SuperScope(_console, port, port == 0 ? cfg.Port1.Keys : cfg.Port2.Keys)); break;
		
		case ControllerType::Multitap: {
			ControllerConfig controllers[4];
			if(port == 0) {
				std::copy(cfg.Port1SubPorts, cfg.Port1SubPorts + 4, controllers);
				controllers[0].Keys = cfg.Port1.Keys;
			} else {
				std::copy(cfg.Port2SubPorts, cfg.Port2SubPorts + 4, controllers);
				controllers[0].Keys = cfg.Port2.Keys;
			}
			device.reset(new Multitap(_console, port, controllers));
			break;
		}
	}

	return device;
}

void SnesControlManager::UpdateControlDevices()
{
	SnesConfig& cfg = _emu->GetSettings()->GetSnesConfig();
	if(_emu->GetSettings()->IsEqual(_prevConfig, cfg) && _controlDevices.size() > 0) {
		//Do nothing if configuration is unchanged
		return;
	}

	auto lock = _deviceLock.AcquireSafe();
	ClearDevices();
	for(int i = 0; i < 2; i++) {
		shared_ptr<BaseControlDevice> device = CreateControllerDevice(i == 0 ? cfg.Port1.Type : cfg.Port2.Type, i);
		if(device) {
			RegisterControlDevice(device);
		}
	}
}

uint8_t SnesControlManager::Read(uint16_t addr, bool forAutoRead)
{
	if(!forAutoRead) {
		if(_console->GetInternalRegisters()->IsAutoReadActive()) {
			_emu->BreakIfDebugging(CpuType::Snes, BreakSource::SnesReadDuringAutoJoy);
		}
		_console->GetInternalRegisters()->ProcessAutoJoypad();
		SetInputReadFlag();
	}

	uint8_t value = _console->GetMemoryManager()->GetOpenBus() & (addr == 0x4016 ? 0xFC : 0xE0);
	for(shared_ptr<BaseControlDevice> &device : _controlDevices) {
		value |= device->ReadRam(addr);
	}

	if(addr == 0x4017) {
		//These bits are always set to 1 for 4017
		value |= 0x1C;
	}

	return value;
}

void SnesControlManager::Write(uint16_t addr, uint8_t value)
{
	//OUT0 (the pin the controller ports have) is generated by the combination
	//of the last value written to 4016.0 by the CPU ORed with the strobe value
	//the auto-read circuit sets. If either one is set, OUT0 will be set.
	if(_lastWriteValue != value) {
		_console->GetInternalRegisters()->ProcessAutoJoypad();

		_lastWriteValue = value;
		for(shared_ptr<BaseControlDevice>& device : _controlDevices) {
			device->WriteRam(addr, value | (uint8_t)_autoReadStrobe);
		}
	}
}

void SnesControlManager::SetAutoReadStrobe(bool strobe)
{
	//OUT0 (the pin the controller ports have) is generated by the combination
	//of the last value written to 4016.0 by the CPU ORed with the strobe value
	//the auto-read circuit sets. If either one is set, OUT0 will be set.
	if(_autoReadStrobe != strobe) {
		_autoReadStrobe = strobe;
		for(shared_ptr<BaseControlDevice>& device : _controlDevices) {
			device->WriteRam(0x4016, _lastWriteValue | (uint8_t)strobe);
		}
	}
}

void SnesControlManager::Serialize(Serializer &s)
{
	if(!s.IsSaving()) {
		UpdateControlDevices();
	}

	BaseControlManager::Serialize(s);

	for(int i = 0; i < (int)_controlDevices.size(); i++) {
		SVI(_controlDevices[i]);
	}

	SV(_lastWriteValue);
	SV(_autoReadStrobe);
}