Xargon/Duckstation
1
0
Fork 0
mirror of https://github.com/RetroDECK/Duckstation.git synced 2024-11-26 15:45:42 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

CDROM: Refactoring seek/read to support timing

Browse source
This commit is contained in:
Connor McLaughlin 2019-10-26 21:07:28 +10:00
parent b4f2bf4d3c
commit 99663d119c
3 changed files with 181 additions and 100 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

244
src/core/cdrom.cpp
View file

@ -36,17 +36,20 @@ void CDROM::SoftReset()
m_command = Command::Sync;
m_command_stage = 0;
m_command_remaining_ticks = 0;
m_sector_read_remaining_ticks = 0;
m_muted = false;
m_adpcm_muted = false;
m_read_or_seek_remaining_ticks = 0;
m_status.bits = 0;
m_secondary_status.bits = 0;
m_mode.bits = 0;
m_interrupt_enable_register = INTERRUPT_REGISTER_MASK;
m_interrupt_flag_register = 0;
m_pending_async_interrupt = 0;
m_pending_location = {};
m_location_pending = false;
m_setloc_position = {};
m_seek_position = {};
m_setloc_pending = false;
m_read_after_seek = false;
m_play_after_seek = false;
m_muted = false;
m_adpcm_muted = false;
m_filter_file_number = 0;
m_filter_channel_number = 0;
std::memset(&m_last_sector_header, 0, sizeof(m_last_sector_header));
@ -78,24 +81,23 @@ void CDROM::SoftReset()
bool CDROM::DoState(StateWrapper& sw)
{
sw.Do(&m_command);
sw.Do(&m_command_state);
sw.Do(&m_command_stage);
sw.Do(&m_command_remaining_ticks);
sw.Do(&m_sector_read_remaining_ticks);
sw.Do(&m_muted);
sw.Do(&m_adpcm_muted);
sw.Do(&m_pending_location.minute);
sw.Do(&m_pending_location.second);
sw.Do(&m_pending_location.frame);
sw.Do(&m_location_pending);
sw.Do(&m_command_state);
sw.Do(&m_read_or_seek_remaining_ticks);
sw.Do(&m_status.bits);
sw.Do(&m_secondary_status.bits);
sw.Do(&m_mode.bits);
sw.Do(&m_interrupt_enable_register);
sw.Do(&m_interrupt_flag_register);
sw.Do(&m_pending_async_interrupt);
sw.DoPOD(&m_pending_location);
sw.Do(&m_location_pending);
sw.DoPOD(&m_setloc_position);
sw.DoPOD(&m_seek_position);
sw.Do(&m_setloc_pending);
sw.Do(&m_read_after_seek);
sw.Do(&m_play_after_seek);
sw.Do(&m_muted);
sw.Do(&m_adpcm_muted);
sw.Do(&m_filter_file_number);
sw.Do(&m_filter_channel_number);
sw.DoBytes(&m_last_sector_header, sizeof(m_last_sector_header));
@ -121,8 +123,8 @@ bool CDROM::DoState(StateWrapper& sw)
{
if (m_command_state == CommandState::WaitForExecute)
m_system->SetDowncount(m_command_remaining_ticks);
if (m_secondary_status.IsReadingOrPlaying())
m_system->SetDowncount(m_sector_read_remaining_ticks);
if (m_secondary_status.seeking || m_secondary_status.reading || m_secondary_status.playing_cdda)
m_system->SetDowncount(m_read_or_seek_remaining_ticks);
// load up media if we had something in there before
m_media.reset();
@ -447,6 +449,13 @@ void CDROM::SendErrorResponse(u8 reason /*= 0x80*/)
SetInterrupt(Interrupt::INT5);
}
void CDROM::SendAsyncErrorResponse(u8 reason /*= 0x80*/)
{
m_async_response_fifo.Push(m_secondary_status.bits | 0x01);
m_async_response_fifo.Push(reason);
SetAsyncInterrupt(Interrupt::INT5);
}
void CDROM::UpdateStatusRegister()
{
m_status.ADPBUSY = false;
@ -459,7 +468,7 @@ void CDROM::UpdateStatusRegister()
m_dma->SetRequest(DMA::Channel::CDROM, m_status.DRQSTS);
}
u32 CDROM::GetAckDelayForCommand() const
TickCount CDROM::GetAckDelayForCommand() const
{
const u32 default_ack_delay = 2000;
if (m_command == Command::Init)
@ -468,11 +477,22 @@ u32 CDROM::GetAckDelayForCommand() const
return default_ack_delay;
}
u32 CDROM::GetTicksForRead() const
TickCount CDROM::GetTicksForRead() const
{
return m_mode.double_speed ? (MASTER_CLOCK / 150) : (MASTER_CLOCK / 75);
}
TickCount CDROM::GetTicksForSeek() const
{
const CDImage::LBA current_lba = m_media->GetPositionOnDisc();
const CDImage::LBA new_lba = m_setloc_position.ToLBA();
const u32 lba_diff = static_cast<u32>((new_lba > current_lba) ? (new_lba - current_lba) : (current_lba - new_lba));
const TickCount ticks = static_cast<TickCount>(20000 + lba_diff * 100);
Log_DebugPrintf("Seek time for %u LBAs: %d", lba_diff, ticks);
return ticks;
}
void CDROM::Execute(TickCount ticks)
{
switch (m_command_state)
@ -496,13 +516,20 @@ void CDROM::Execute(TickCount ticks)
break;
}
if (m_secondary_status.IsReadingOrPlaying())
if (m_secondary_status.IsActive())
{
m_sector_read_remaining_ticks -= ticks;
if (m_sector_read_remaining_ticks <= 0)
DoSectorRead();
m_read_or_seek_remaining_ticks -= ticks;
if (m_read_or_seek_remaining_ticks <= 0)
{
if (m_secondary_status.seeking)
DoSeekComplete();
else
DoSectorRead();
}
else
m_system->SetDowncount(m_sector_read_remaining_ticks);
{
m_system->SetDowncount(m_read_or_seek_remaining_ticks);
}
}
}
@ -606,53 +633,6 @@ void CDROM::ExecuteCommand()
return;
}
case Command::Setloc:
{
// TODO: Verify parameter count
m_pending_location.minute = BCDToDecimal(m_param_fifo.Peek(0));
m_pending_location.second = BCDToDecimal(m_param_fifo.Peek(1));
m_pending_location.frame = BCDToDecimal(m_param_fifo.Peek(2));
m_location_pending = true;
Log_DebugPrintf("CDROM setloc command (%02X, %02X, %02X)", ZeroExtend32(m_param_fifo.Peek(0)),
ZeroExtend32(m_param_fifo.Peek(1)), ZeroExtend32(m_param_fifo.Peek(2)));
SendACKAndStat();
EndCommand();
return;
}
case Command::SeekL:
case Command::SeekP:
{
// TODO: Data vs audio mode
Log_DebugPrintf("CDROM seek command");
if (m_command_stage == 0)
{
Assert(m_location_pending);
StopReading();
if (!m_media || !m_media->Seek(m_pending_location))
{
Panic("Error in Setloc command");
return;
}
m_location_pending = false;
m_secondary_status.motor_on = true;
m_secondary_status.seeking = true;
SendACKAndStat();
NextCommandStage(false, 20000);
}
else
{
m_secondary_status.seeking = false;
m_response_fifo.Push(m_secondary_status.bits);
SetInterrupt(Interrupt::INT2);
EndCommand();
}
return;
}
case Command::Setfilter:
{
const u8 file = m_param_fifo.Peek(0);
@ -676,14 +656,57 @@ void CDROM::ExecuteCommand()
return;
}
case Command::Setloc:
{
if (m_secondary_status.reading || m_secondary_status.playing_cdda || m_secondary_status.seeking)
Log_WarningPrintf("Setloc while reading/playing/seeking");
// TODO: Verify parameter count
m_setloc_position.minute = BCDToDecimal(m_param_fifo.Peek(0));
m_setloc_position.second = BCDToDecimal(m_param_fifo.Peek(1));
m_setloc_position.frame = BCDToDecimal(m_param_fifo.Peek(2));
m_setloc_pending = true;
Log_DebugPrintf("CDROM setloc command (%02X, %02X, %02X)", ZeroExtend32(m_param_fifo.Peek(0)),
ZeroExtend32(m_param_fifo.Peek(1)), ZeroExtend32(m_param_fifo.Peek(2)));
SendACKAndStat();
EndCommand();
return;
}
case Command::SeekL:
case Command::SeekP:
{
// TODO: Data vs audio mode
Log_DebugPrintf("CDROM seek command");
if (!m_media)
{
SendErrorResponse(0x80);
}
else
{
StopReading();
BeginSeeking();
SendACKAndStat();
}
EndCommand();
return;
}
case Command::ReadN:
case Command::ReadS:
{
Log_DebugPrintf("CDROM read command");
if (!m_media)
{
SendErrorResponse(0x80);
}
else
{
StopReading();
BeginReading(false);
SendACKAndStat();
}
EndCommand();
return;
@ -710,11 +733,12 @@ void CDROM::ExecuteCommand()
track = Truncate8(m_media->GetTrackNumber());
}
m_pending_location = m_media->GetTrackStartMSFPosition(track);
m_location_pending = true;
m_setloc_position = m_media->GetTrackStartMSFPosition(track);
m_setloc_pending = true;
}
BeginReading(true);
SendACKAndStat();
}
EndCommand();
@ -902,14 +926,12 @@ void CDROM::BeginReading(bool cdda)
{
Log_DebugPrintf("Starting %s", cdda ? "playing CDDA" : "reading");
// TODO: Seek timing and clean up...
if (m_location_pending)
if (m_setloc_pending)
{
if (!m_media || !m_media->Seek(m_pending_location))
{
Panic("Seek error");
}
m_location_pending = false;
BeginSeeking();
m_read_after_seek = !cdda;
m_play_after_seek = cdda;
return;
}
m_secondary_status.motor_on = true;
@ -917,10 +939,52 @@ void CDROM::BeginReading(bool cdda)
m_secondary_status.reading = !cdda;
m_secondary_status.playing_cdda = cdda;
SendACKAndStat();
m_read_or_seek_remaining_ticks = GetTicksForRead();
m_system->SetDowncount(m_read_or_seek_remaining_ticks);
}
m_sector_read_remaining_ticks = GetTicksForRead();
m_system->SetDowncount(m_sector_read_remaining_ticks);
void CDROM::BeginSeeking()
{
if (!m_setloc_pending)
Log_WarningPrintf("Seeking without setloc set");
m_seek_position = m_setloc_position;
m_setloc_pending = false;
Log_DebugPrintf("Seeking to [%02u:%02u:%02u]", m_seek_position.minute, m_seek_position.second, m_seek_position.frame);
Assert(!m_secondary_status.IsReadingOrPlaying());
m_secondary_status.motor_on = true;
m_secondary_status.seeking = true;
m_read_or_seek_remaining_ticks = GetTicksForSeek();
m_system->SetDowncount(m_read_or_seek_remaining_ticks);
}
void CDROM::DoSeekComplete()
{
Assert(m_secondary_status.seeking);
m_secondary_status.seeking = false;
if (m_media && m_media->Seek(m_seek_position))
{
// seek complete, transition to play/read if requested
if (m_play_after_seek || m_read_after_seek)
BeginReading(m_play_after_seek);
m_async_response_fifo.Push(m_secondary_status.bits);
SetAsyncInterrupt(Interrupt::INT2);
}
else
{
Log_WarningPrintf("Seek to [%02u:%02u:%02u] failed", m_seek_position.minute, m_seek_position.second,
m_seek_position.frame);
SendAsyncErrorResponse(0x80);
}
m_setloc_pending = false;
m_read_after_seek = false;
m_play_after_seek = false;
}
void CDROM::DoSectorRead()
@ -947,8 +1011,8 @@ void CDROM::DoSectorRead()
else
Panic("Not reading or playing");
m_sector_read_remaining_ticks += GetTicksForRead();
m_system->SetDowncount(m_sector_read_remaining_ticks);
m_read_or_seek_remaining_ticks += GetTicksForRead();
m_system->SetDowncount(m_read_or_seek_remaining_ticks);
}
void CDROM::ProcessDataSector()
@ -956,7 +1020,7 @@ void CDROM::ProcessDataSector()
std::memcpy(&m_last_sector_header, &m_sector_buffer[SECTOR_SYNC_SIZE], sizeof(m_last_sector_header));
std::memcpy(&m_last_sector_subheader, &m_sector_buffer[SECTOR_SYNC_SIZE + sizeof(m_last_sector_header)],
sizeof(m_last_sector_subheader));
Log_DevPrintf("Read sector %u: mode %u submode 0x%02X", m_media->GetPositionOnDisc(),
Log_DevPrintf("Read sector %u: mode %u submode 0x%02X", m_media->GetPositionOnDisc() - 1,
ZeroExtend32(m_last_sector_header.sector_mode), ZeroExtend32(m_last_sector_subheader.submode.bits));
bool pass_to_cpu = true;
@ -1158,13 +1222,15 @@ void CDROM::ProcessCDDASector()
void CDROM::StopReading()
{
if (!m_secondary_status.IsReadingOrPlaying())
if (!m_secondary_status.IsActive())
return;
Log_DebugPrintf("Stopping %s", m_secondary_status.reading ? "reading" : "playing CDDA");
Log_DebugPrintf("Stopping %s",
m_secondary_status.seeking ? "seeking" : (m_secondary_status.reading ? "reading" : "playing CDDA"));
m_secondary_status.reading = false;
m_secondary_status.playing_cdda = false;
m_sector_read_remaining_ticks = 0;
m_secondary_status.seeking = false;
m_read_or_seek_remaining_ticks = 0;
}
void CDROM::LoadDataFIFO()

35
src/core/cdrom.h
View file

@ -133,7 +133,15 @@ private:
BitField<u8, bool, 6, 1> seeking;
BitField<u8, bool, 7, 1> playing_cdda;
bool IsReadingOrPlaying() const { return reading || playing_cdda; }
ALWAYS_INLINE bool IsReadingOrPlaying() const { return reading || playing_cdda; }
/// Returns true if seeking, reading or playing CDDA.
ALWAYS_INLINE bool IsActive() const
{
// MSVC can't turn this into a single bit test :(
// return seeking || reading || playing_cdda;
return (bits & 0xE0) != 0;
}
};
union ModeRegister
@ -166,21 +174,25 @@ private:
void DeliverAsyncInterrupt();
void SendACKAndStat();
void SendErrorResponse(u8 reason = 0x80);
void SendAsyncErrorResponse(u8 reason = 0x80);
void UpdateStatusRegister();
u32 GetAckDelayForCommand() const;
u32 GetTicksForRead() const;
TickCount GetAckDelayForCommand() const;
TickCount GetTicksForRead() const;
TickCount GetTicksForSeek() const;
void BeginCommand(Command command); // also update status register
void NextCommandStage(bool wait_for_irq, u32 time);
void EndCommand(); // also updates status register
void ExecuteCommand();
void ExecuteTestCommand(u8 subcommand);
void BeginReading(bool cdda);
void DoSeekComplete();
void DoSectorRead();
void ProcessDataSector();
void ProcessXAADPCMSector();
void ProcessCDDASector();
void StopReading();
void BeginSeeking();
void LoadDataFIFO();
System* m_system = nullptr;
@ -189,14 +201,11 @@ private:
SPU* m_spu = nullptr;
std::unique_ptr<CDImage> m_media;
CommandState m_command_state = CommandState::Idle;
Command m_command = Command::Sync;
CommandState m_command_state = CommandState::Idle;
u32 m_command_stage = 0;
TickCount m_command_remaining_ticks = 0;
TickCount m_sector_read_remaining_ticks = 0;
bool m_muted = false;
bool m_adpcm_muted = false;
TickCount m_read_or_seek_remaining_ticks = 0;
StatusRegister m_status = {};
SecondaryStatusRegister m_secondary_status = {};
@ -206,8 +215,14 @@ private:
u8 m_interrupt_flag_register = 0;
u8 m_pending_async_interrupt = 0;
CDImage::Position m_pending_location = {};
bool m_location_pending = false;
CDImage::Position m_setloc_position = {};
CDImage::Position m_seek_position = {};
bool m_setloc_pending = false;
bool m_read_after_seek = false;
bool m_play_after_seek = false;
bool m_muted = false;
bool m_adpcm_muted = false;
u8 m_filter_file_number = 0;
u8 m_filter_channel_number = 0;

2
src/duckstation/main.cpp
View file

@ -84,7 +84,7 @@ int main(int argc, char* argv[])
#else
g_pLog->SetConsoleOutputParams(true, nullptr, LOGLEVEL_DEBUG);
// g_pLog->SetConsoleOutputParams(true, "GPU GPU_HW_OpenGL SPU Pad DigitalController", LOGLEVEL_DEBUG);
g_pLog->SetConsoleOutputParams(true, "GPU GPU_HW_OpenGL Pad DigitalController InterruptController", LOGLEVEL_DEBUG);
g_pLog->SetConsoleOutputParams(true, "GPU GPU_HW_OpenGL Pad DigitalController InterruptController SPU MDEC", LOGLEVEL_DEBUG);
// g_pLog->SetFilterLevel(LOGLEVEL_TRACE);
g_pLog->SetFilterLevel(LOGLEVEL_DEBUG);
// g_pLog->SetFilterLevel(LOGLEVEL_DEV);