Remove built-in rewind code - RetroArch takes care of that

Core/Console.cpp

@@ -22,7 +22,6 @@
 #include "SoundMixer.h"
 #include "NsfMapper.h"
 #include "MovieManager.h"
-#include "RewindManager.h"
 #include "SaveStateManager.h"
 #include "HdPackBuilder.h"
 #include "HdAudioDevice.h"
@@ -106,8 +105,6 @@ void Console::Release(bool forShutdown)
 		_master->_notificationManager->SendNotification(ConsoleNotificationType::VsDualSystemStopped);
 	}
 
-	_rewindManager.reset();
-
 	_hdPackBuilder.reset();
 	_hdData.reset();
 	_hdAudioDevice.reset();
@@ -363,14 +360,6 @@ bool Console::Initialize(VirtualFile &romFile, VirtualFile &patchFile, bool forP
 
 			ResetComponents(false);
 
-			//Reset components before creating rewindmanager, otherwise the first save state it takes will be invalid
-			if(!forPowerCycle) {
-				_rewindManager.reset(new RewindManager(shared_from_this()));
-				_notificationManager->RegisterNotificationListener(_rewindManager);
-			} else {
-				_rewindManager->Initialize();
-			}
-
 			//Poll controller input after creating rewind manager, to make sure it catches the first frame's input
 			_controlManager->UpdateInputState();
 
@@ -479,11 +468,6 @@ CheatManager* Console::GetCheatManager()
 	return _cheatManager.get();
 }
 
-shared_ptr<RewindManager> Console::GetRewindManager()
-{
-	return _rewindManager;
-}
-
 HistoryViewer* Console::GetHistoryViewer()
 {
 	return _historyViewer.get();
@@ -659,7 +643,6 @@ void Console::Run()
 			if(_historyViewer) {
 				_historyViewer->ProcessEndOfFrame();
 			}
-			_rewindManager->ProcessEndOfFrame();
 			_settings->DisableOverclocking(_disableOcNextFrame || IsNsf());
 			_disableOcNextFrame = false;
 
@@ -1185,20 +1168,6 @@ bool Console::IsNsf()
 	return std::dynamic_pointer_cast<NsfMapper>(_mapper) != nullptr;
 }
 
-void Console::CopyRewindData(shared_ptr<Console> sourceConsole)
-{
-	sourceConsole->Pause();
-	Pause();
-
-	//Disable battery saving for this instance
-	_batteryManager->SetSaveEnabled(false);
-	_historyViewer.reset(new HistoryViewer(shared_from_this()));
-	sourceConsole->_rewindManager->CopyHistory(_historyViewer);
-
-	Resume();
-	sourceConsole->Resume();
-}
-
 uint8_t* Console::GetRamBuffer(uint16_t address)
 {
 	//Only used by libretro port for achievements - should not be used by anything else.

Core/Console.h

@@ -6,7 +6,6 @@
 #include "VirtualFile.h"
 
 class BaseMapper;
-class RewindManager;
 class HistoryViewer;
 class APU;
 class CPU;
@@ -48,7 +47,6 @@ private:
 	SimpleLock _stopLock;
 	atomic<uint32_t> _pauseCounter;
 
-	shared_ptr<RewindManager> _rewindManager;
 	shared_ptr<HistoryViewer> _historyViewer;
 
 	shared_ptr<CPU> _cpu;
@@ -129,7 +127,6 @@ public:
 	ControlManager* GetControlManager();
 	MemoryManager* GetMemoryManager();
 	CheatManager* GetCheatManager();
-	shared_ptr<RewindManager> GetRewindManager();
 	HistoryViewer* GetHistoryViewer();
 
 	bool LoadMatchingRom(string romName, HashInfo hashInfo);
@@ -209,8 +206,6 @@ public:
 	void StartRecordingHdPack(string saveFolder, ScaleFilterType filterType, uint32_t scale, uint32_t flags, uint32_t chrRamBankSize);
 	void StopRecordingHdPack();
 	
-	void CopyRewindData(shared_ptr<Console> sourceConsole);
-
 	uint8_t* GetRamBuffer(uint16_t address);
 		
 	void DebugAddTrace(const char *log);

Core/Debugger.cpp

@@ -19,7 +19,6 @@
 #include "DisassemblyInfo.h"
 #include "PPU.h"
 #include "MemoryManager.h"
-#include "RewindManager.h"
 #include "DebugBreakHelper.h"
 #include "ScriptHost.h"
 #include "StandardController.h"
@@ -95,7 +94,6 @@ Debugger::Debugger(shared_ptr<Console> console, shared_ptr<CPU> cpu, shared_ptr<
 	_runToCycle = -1;
 	_prevInstructionCycle = -1;
 	_curInstructionCycle = -1;
-	_needRewind = false;
 
 	//Only enable break on uninitialized reads when debugger is opened at power on/reset
 	_enableBreakOnUninitRead = _cpu->GetPC() == 0;
@@ -705,32 +703,6 @@ bool Debugger::ProcessRamOperation(MemoryOperationType type, uint16_t &addr, uin
 			value = _memoryManager->DebugRead(addr, true);
 			_cpu->SetDebugPC(addr);
 			_nextReadAddr = -1;
-		} else if(_needRewind) {
-			//Step back - Need to load a state, and then alter the current opcode based on the new program counter
-			if(!_rewindCache.empty()) {
-				//Restore the state, and the cycle number of the instruction that preceeded that state
-				//Otherwise, the target cycle number when building the next cache will be incorrect
-				_console->LoadState(_rewindCache.back());
-				_curInstructionCycle = _rewindPrevInstructionCycleCache.back();
-				
-				_rewindCache.pop_back();
-				_rewindPrevInstructionCycleCache.pop_back();
-				
-				//This state is for the instruction we want to stop on, break here.
-				_runToCycle = -1;
-				Step(1);
-			} else {
-				_console->GetRewindManager()->StartRewinding(true);
-				
-				//Adjust the cycle counter by 1 because the state was taken before the instruction started
-				//whereas the CPU already read the first byte of the instruction by the time we get here
-				State cpuState;
-				_cpu->GetState(cpuState);
-				cpuState.CycleCount++;
-				_cpu->SetState(cpuState);
-			}
-			UpdateProgramCounter(addr, value);
-			_needRewind = false;
 		}
 		ProcessScriptSaveState(addr, value);
 
@@ -798,8 +770,6 @@ bool Debugger::ProcessRamOperation(MemoryOperationType type, uint16_t &addr, uin
 
 		if(_runToCycle != -1) {
 			if((int64_t)_cpu->GetCycleCount() >= _runToCycle) {
-				//Step back operation is done, revert RewindManager's state & break debugger
-				_console->GetRewindManager()->StopRewinding(true);
 				_runToCycle = -1;
 				Step(1);
 			} else if(_runToCycle - (int64_t)_cpu->GetCycleCount() < 500) {
@@ -916,7 +886,7 @@ bool Debugger::ProcessRamOperation(MemoryOperationType type, uint16_t &addr, uin
 		if(_runToCycle == -1 && (type == MemoryOperationType::ExecOpCode || type == MemoryOperationType::ExecOperand)) {
 			_memoryAccessCounter->ProcessMemoryExec(addressInfo, _cpu->GetCycleCount());
 		}
-		if(!_needRewind && type == MemoryOperationType::ExecOpCode) {
+		if(type == MemoryOperationType::ExecOpCode) {
 			UpdateCallstack(_lastInstruction, addr);
 		}
 	}
@@ -1120,7 +1090,6 @@ void Debugger::StepBack()
 {
 	if(_runToCycle == -1 && _prevInstructionCycle < _curInstructionCycle) {
 		_runToCycle = _prevInstructionCycle;
-		_needRewind = true;
 		Run();
 	}
 }

Core/EmulationSettings.cpp

@@ -1,7 +1,6 @@
 #include "stdafx.h"
 #include "EmulationSettings.h"
 #include "Console.h"
-#include "RewindManager.h"
 
 //Version 0.9.9
 uint16_t EmulationSettings::_versionMajor = 0;

Core/HdBuilderPpu.h

@@ -3,7 +3,6 @@
 #include "PPU.h"
 #include "HdNesPack.h"
 #include "VideoDecoder.h"
-#include "RewindManager.h"
 #include "HdPackBuilder.h"
 #include "HdPpu.h"
 
@@ -127,4 +126,4 @@ public:
 			PPU::SendFrame();
 		}
 	}
-};
+};

Core/HdPpu.cpp

@@ -4,7 +4,6 @@
 #include "Console.h"
 #include "HdNesPack.h"
 #include "VideoDecoder.h"
-#include "RewindManager.h"
 #include "HdPackConditions.h"
 #include "NotificationManager.h"
 #include "BaseMapper.h"

Core/LuaApi.cpp

@@ -10,7 +10,6 @@
 #include "ScriptingContext.h"
 #include "DebugHud.h"
 #include "VideoDecoder.h"
-#include "RewindManager.h"
 #include "SaveStateManager.h"
 #include "Console.h"
 #include "IKeyManager.h"
@@ -591,7 +590,6 @@ int LuaApi::Rewind(lua_State *lua)
 	checkparams();
 	checksavestateconditions();
 	errorCond(seconds <= 0, "seconds must be >= 1");
-	_console->GetRewindManager()->RewindSeconds(seconds);
 	return l.ReturnCount();
 }
 

Core/PPU.cpp

@@ -6,7 +6,6 @@
 #include "VideoDecoder.h"
 #include "Debugger.h"
 #include "BaseMapper.h"
-#include "RewindManager.h"
 #include "ControlManager.h"
 #include "MemoryManager.h"
 #include "Console.h"

Core/SoundMixer.cpp

@@ -4,7 +4,6 @@
 #include "SoundMixer.h"
 #include "CPU.h"
 #include "VideoRenderer.h"
-#include "RewindManager.h"
 #include "OggMixer.h"
 #include "Console.h"
 #include "BaseMapper.h"

Core/VideoDecoder.cpp

@@ -9,7 +9,6 @@
 #include "HdVideoFilter.h"
 #include "ScaleFilter.h"
 #include "VideoRenderer.h"
-#include "RewindManager.h"
 #include "Console.h"
 #include "PPU.h"
 #include "HdData.h"
@@ -124,8 +123,7 @@ void VideoDecoder::DecodeFrame(bool synchronous)
 
 	_frameChanged = false;
 	
-	//Rewind manager will take care of sending the correct frame to the video renderer
+	_console->GetVideoRenderer()->UpdateFrame(outputBuffer, frameInfo.Width, frameInfo.Height);
-	_console->GetRewindManager()->SendFrame(outputBuffer, frameInfo.Width, frameInfo.Height, synchronous);
 }
 
 uint32_t VideoDecoder::GetFrameCount()