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DVDInterface: Read disc after delay, not before

This commit is contained in:
JosJuice 2015-02-17 14:57:36 +01:00
parent 3414f818cd
commit 3ac0977bc6
4 changed files with 104 additions and 26 deletions
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8
Source/Core/Core/CoreTiming.cpp
View File

@ -232,8 +232,14 @@ void ScheduleEvent_Threadsafe(int cyclesIntoFuture, int event_type, u64 userdata
tsQueue.Push(ne);
}
// Executes an event immediately, then returns.
void ScheduleEvent_Immediate(int event_type, u64 userdata)
{
event_types[event_type].callback(userdata, 0);
}
// Same as ScheduleEvent_Threadsafe(0, ...) EXCEPT if we are already on the CPU thread
// in which case the event will get handled immediately, before returning.
// in which case this is the same as ScheduleEvent_Immediate.
void ScheduleEvent_Threadsafe_Immediate(int event_type, u64 userdata)
{
if (Core::IsCPUThread())

10
Source/Core/Core/CoreTiming.h
View File

@ -43,11 +43,11 @@ void DoState(PointerWrap &p);
int RegisterEvent(const std::string& name, TimedCallback callback);
void UnregisterAllEvents();
// userdata MAY NOT CONTAIN POINTERS. userdata might get written and reloaded from disk,
// when we implement state saves.
void ScheduleEvent(int cyclesIntoFuture, int event_type, u64 userdata=0);
void ScheduleEvent_Threadsafe(int cyclesIntoFuture, int event_type, u64 userdata=0);
void ScheduleEvent_Threadsafe_Immediate(int event_type, u64 userdata=0);
// userdata MAY NOT CONTAIN POINTERS. userdata might get written and reloaded from savestates.
void ScheduleEvent(int cyclesIntoFuture, int event_type, u64 userdata = 0);
void ScheduleEvent_Immediate(int event_type, u64 userdata = 0);
void ScheduleEvent_Threadsafe(int cyclesIntoFuture, int event_type, u64 userdata = 0);
void ScheduleEvent_Threadsafe_Immediate(int event_type, u64 userdata = 0);
// We only permit one event of each type in the queue at a time.
void RemoveEvent(int event_type);

110
Source/Core/Core/HW/DVDInterface.cpp
View File

@ -213,6 +213,22 @@ union UDICFG
UDICFG(u32 _hex) {Hex = _hex;}
};
struct DVDReadCommand
{
bool is_valid;
u64 DVD_offset;
u32 output_address;
u32 length;
bool decrypt;
DIInterruptType interrupt_type;
// Used to notify emulated software after executing command.
// Pointers don't work with savestates, so CoreTiming events are used instead
int callback_event_type;
};
// STATE_TO_SAVE
// hardware registers
@ -225,6 +241,8 @@ static UDICR m_DICR;
static UDIIMMBUF m_DIIMMBUF;
static UDICFG m_DICFG;
static DVDReadCommand current_read_command;
static u32 AudioPos;
static u32 CurrentStart;
static u32 CurrentLength;
@ -237,6 +255,7 @@ static bool g_bDiscInside = false;
bool g_bStream = false;
static bool g_bStopAtTrackEnd = false;
static int finish_execute_command = 0;
static int finish_execute_read_command = 0;
static int dtk = 0;
static u64 g_last_read_offset;
@ -257,8 +276,8 @@ void UpdateInterrupts();
void GenerateDIInterrupt(DIInterruptType _DVDInterrupt);
void WriteImmediate(u32 value, u32 output_address, bool write_to_DIIMMBUF);
void ExecuteReadCommand(u64 DVD_offset, u32 output_address, u32 DVD_length, u32 output_length,
bool decrypt, DIInterruptType* interrupt_type, u64* ticks_until_completion);
DVDReadCommand ExecuteReadCommand(u64 DVD_offset, u32 output_address, u32 DVD_length, u32 output_length,
bool decrypt, DIInterruptType* interrupt_type, u64* ticks_until_completion);
u64 SimulateDiscReadTime(u64 offset, u32 length);
s64 CalculateRawDiscReadTime(u64 offset, s64 length);
@ -274,6 +293,8 @@ void DoState(PointerWrap &p)
p.Do(m_DIIMMBUF);
p.DoPOD(m_DICFG);
p.Do(current_read_command);
p.Do(NextStart);
p.Do(AudioPos);
p.Do(NextLength);
@ -301,6 +322,30 @@ static void FinishExecuteCommand(u64 userdata, int cyclesLate)
}
}
static void FinishExecuteReadCommand(u64 userdata, int cyclesLate)
{
if (!current_read_command.is_valid)
{
PanicAlertT("DVDInterface tried to execute non-existing command");
}
else
{
// Here is the actual disc reading
if (!DVDRead(current_read_command.DVD_offset, current_read_command.output_address,
current_read_command.length, current_read_command.decrypt))
{
PanicAlertT("Can't read from DVD_Plugin - DVD-Interface: Fatal Error");
}
}
// The command is marked as invalid because it shouldn't be used again
current_read_command.is_valid = false;
// The final step is to notify the emulated software that the command has been executed
CoreTiming::ScheduleEvent_Immediate(current_read_command.callback_event_type,
current_read_command.interrupt_type);
}
static u32 ProcessDTKSamples(short *tempPCM, u32 num_samples)
{
u32 samples_processed = 0;
@ -376,6 +421,8 @@ void Init()
m_DICFG.Hex = 0;
m_DICFG.CONFIG = 1; // Disable bootrom descrambler
current_read_command.is_valid = false;
AudioPos = 0;
NextStart = 0;
NextLength = 0;
@ -394,6 +441,7 @@ void Init()
insertDisc = CoreTiming::RegisterEvent("InsertDisc", InsertDiscCallback);
finish_execute_command = CoreTiming::RegisterEvent("FinishExecuteCommand", FinishExecuteCommand);
finish_execute_read_command = CoreTiming::RegisterEvent("FinishExecuteReadCommand", FinishExecuteReadCommand);
dtk = CoreTiming::RegisterEvent("StreamingTimer", DTKStreamingCallback);
CoreTiming::ScheduleEvent(0, dtk);
@ -598,14 +646,19 @@ void WriteImmediate(u32 value, u32 output_address, bool write_to_DIIMMBUF)
Memory::Write_U32(value, output_address);
}
void ExecuteReadCommand(u64 DVD_offset, u32 output_address, u32 DVD_length, u32 output_length,
bool decrypt, DIInterruptType* interrupt_type, u64* ticks_until_completion)
// If the returned DVDReadCommand has is_valid set to true,
// FinishExecuteReadCommand must be used to finish executing it
DVDReadCommand ExecuteReadCommand(u64 DVD_offset, u32 output_address, u32 DVD_length, u32 output_length,
bool decrypt, DIInterruptType* interrupt_type, u64* ticks_until_completion)
{
DVDReadCommand command;
if (!g_bDiscInside)
{
g_ErrorCode = ERROR_NO_DISK | ERROR_COVER_H;
*interrupt_type = INT_DEINT;
return;
command.is_valid = false;
return command;
}
if (DVD_length > output_length)
@ -619,10 +672,13 @@ void ExecuteReadCommand(u64 DVD_offset, u32 output_address, u32 DVD_length, u32
else
*ticks_until_completion = SimulateDiscReadTime(DVD_offset, DVD_length);
if (!DVDRead(DVD_offset, output_address, DVD_length, decrypt))
PanicAlertT("Can't read from DVD_Plugin - DVD-Interface: Fatal Error");
*interrupt_type = INT_TCINT;
command.is_valid = true;
command.DVD_offset = DVD_offset;
command.output_address = output_address;
command.length = DVD_length;
command.decrypt = decrypt;
return command;
}
// When the command has finished executing, callback_event_type
@ -633,6 +689,8 @@ void ExecuteCommand(u32 command_0, u32 command_1, u32 command_2, u32 output_addr
{
DIInterruptType interrupt_type = INT_TCINT;
u64 ticks_until_completion = SystemTimers::GetTicksPerSecond() / 15000;
DVDReadCommand read_command;
read_command.is_valid = false;
bool GCAM = (SConfig::GetInstance().m_SIDevice[0] == SIDEVICE_AM_BASEBOARD) &&
(SConfig::GetInstance().m_EXIDevice[2] == EXIDEVICE_AM_BASEBOARD);
@ -677,15 +735,15 @@ void ExecuteCommand(u32 command_0, u32 command_1, u32 command_2, u32 output_addr
// Only seems to be used from WII_IPC, not through direct access
case DVDLowReadDiskID:
INFO_LOG(DVDINTERFACE, "DVDLowReadDiskID");
ExecuteReadCommand(0, output_address, 0x20, output_length,
false, &interrupt_type, &ticks_until_completion);
read_command = ExecuteReadCommand(0, output_address, 0x20, output_length,
false, &interrupt_type, &ticks_until_completion);
break;
// Only used from WII_IPC. This is the only read command that decrypts data
case DVDLowRead:
INFO_LOG(DVDINTERFACE, "DVDLowRead: DVDAddr: 0x%09" PRIx64 ", Size: 0x%x", (u64)command_2 << 2, command_1);
ExecuteReadCommand((u64)command_2 << 2, output_address, command_1, output_length,
true, &interrupt_type, &ticks_until_completion);
read_command = ExecuteReadCommand((u64)command_2 << 2, output_address, command_1, output_length,
true, &interrupt_type, &ticks_until_completion);
break;
// Probably only used by Wii
@ -764,8 +822,8 @@ void ExecuteCommand(u32 command_0, u32 command_1, u32 command_2, u32 output_addr
(command_2 > 0x7ed40000 && command_2 < 0x7ed40008) ||
(((command_2 + command_1) > 0x7ed40000) && (command_2 + command_1) < 0x7ed40008)))
{
ExecuteReadCommand((u64)command_2 << 2, output_address, command_1, output_length,
false, &interrupt_type, &ticks_until_completion);
read_command = ExecuteReadCommand((u64)command_2 << 2, output_address, command_1, output_length,
false, &interrupt_type, &ticks_until_completion);
}
else
{
@ -861,15 +919,15 @@ void ExecuteCommand(u32 command_0, u32 command_1, u32 command_2, u32 output_addr
}
}
ExecuteReadCommand(iDVDOffset, output_address, command_2, output_length,
false, &interrupt_type, &ticks_until_completion);
read_command = ExecuteReadCommand(iDVDOffset, output_address, command_2, output_length,
false, &interrupt_type, &ticks_until_completion);
}
break;
case 0x40: // Read DiscID
INFO_LOG(DVDINTERFACE, "Read DiscID %08x", Memory::Read_U32(output_address));
ExecuteReadCommand(0, output_address, 0x20, output_length,
false, &interrupt_type, &ticks_until_completion);
read_command = ExecuteReadCommand(0, output_address, 0x20, output_length,
false, &interrupt_type, &ticks_until_completion);
break;
default:
@ -1206,7 +1264,21 @@ void ExecuteCommand(u32 command_0, u32 command_1, u32 command_2, u32 output_addr
// The command will finish executing after a delay,
// to simulate the speed of a real disc drive
CoreTiming::ScheduleEvent((int)ticks_until_completion, callback_event_type, interrupt_type);
if (read_command.is_valid)
{
// We schedule a FinishExecuteReadCommand (which will call the actual callback
// once it's done) so that the data transfer isn't completed too early.
// Most games don't care about it, but if it's done wrong, Resident Evil 3
// plays some extra noise when playing the menu selection sound effect.
read_command.callback_event_type = callback_event_type;
read_command.interrupt_type = interrupt_type;
current_read_command = read_command;
CoreTiming::ScheduleEvent((int)ticks_until_completion, finish_execute_read_command);
}
else
{
CoreTiming::ScheduleEvent((int)ticks_until_completion, callback_event_type, interrupt_type);
}
}
// Simulates the timing aspects of reading data from a disc.

2
Source/Core/Core/State.cpp
View File

@ -64,7 +64,7 @@ static Common::Event g_compressAndDumpStateSyncEvent;
static std::thread g_save_thread;
// Don't forget to increase this after doing changes on the savestate system
static const u32 STATE_VERSION = 39;
static const u32 STATE_VERSION = 40;
enum
{