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Duckstation/src/core/cdrom.cpp
Connor McLaughlin 72f6503bec CDROM: Reduce speed change delay
2020-04-25 14:16:36 +10:00

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62 KiB
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#include "cdrom.h"
#include "common/cd_image.h"
#include "common/log.h"
#include "common/state_wrapper.h"
#include "dma.h"
#include "game_list.h"
#include "imgui.h"
#include "interrupt_controller.h"
#include "settings.h"
#include "spu.h"
#include "system.h"
Log_SetChannel(CDROM);
CDROM::CDROM() = default;
CDROM::~CDROM() = default;
void CDROM::Initialize(System* system, DMA* dma, InterruptController* interrupt_controller, SPU* spu)
{
m_system = system;
m_dma = dma;
m_interrupt_controller = interrupt_controller;
m_spu = spu;
m_command_event =
m_system->CreateTimingEvent("CDROM Command Event", 1, 1, std::bind(&CDROM::ExecuteCommand, this), false);
m_drive_event = m_system->CreateTimingEvent("CDROM Drive Event", 1, 1,
std::bind(&CDROM::ExecuteDrive, this, std::placeholders::_2), false);
if (m_system->GetSettings().cdrom_read_thread)
m_reader.StartThread();
}
void CDROM::Reset()
{
SoftReset();
// this should be reading sector 0
m_reader.WaitForReadToComplete();
if (m_reader.GetSectorSubQ().IsCRCValid())
m_last_subq = m_reader.GetSectorSubQ();
}
void CDROM::SoftReset()
{
m_command = Command::None;
m_command_event->Deactivate();
m_drive_state = DriveState::Idle;
m_drive_event->Deactivate();
m_status.bits = 0;
m_secondary_status.bits = 0;
m_secondary_status.motor_on = HasMedia();
m_mode.bits = 0;
m_current_double_speed = false;
m_interrupt_enable_register = INTERRUPT_REGISTER_MASK;
m_interrupt_flag_register = 0;
m_pending_async_interrupt = 0;
m_setloc_position = {};
m_last_requested_sector = 0;
if (m_reader.HasMedia())
m_reader.QueueReadSector(m_last_requested_sector);
m_setloc_pending = false;
m_read_after_seek = false;
m_play_after_seek = false;
m_muted = false;
m_adpcm_muted = false;
m_xa_filter_file_number = 0;
m_xa_filter_channel_number = 0;
m_xa_current_file_number = 0;
m_xa_current_channel_number = 0;
m_xa_current_set = false;
std::memset(&m_last_sector_header, 0, sizeof(m_last_sector_header));
std::memset(&m_last_sector_subheader, 0, sizeof(m_last_sector_subheader));
m_last_sector_header_valid = false;
std::memset(&m_last_subq, 0, sizeof(m_last_subq));
m_last_cdda_report_frame_nibble = 0xFF;
m_cdda_report_delay = 0;
m_next_cd_audio_volume_matrix[0][0] = 0x80;
m_next_cd_audio_volume_matrix[0][1] = 0x00;
m_next_cd_audio_volume_matrix[1][0] = 0x00;
m_next_cd_audio_volume_matrix[1][1] = 0x80;
m_cd_audio_volume_matrix = m_next_cd_audio_volume_matrix;
m_xa_last_samples.fill(0);
for (u32 i = 0; i < 2; i++)
{
m_xa_resample_ring_buffer[i].fill(0);
m_xa_resample_p = 0;
m_xa_resample_sixstep = 6;
}
m_param_fifo.Clear();
m_response_fifo.Clear();
m_async_response_fifo.Clear();
m_data_fifo.Clear();
m_current_read_sector_buffer = 0;
m_current_write_sector_buffer = 0;
for (u32 i = 0; i < NUM_SECTOR_BUFFERS; i++)
{
m_sector_buffers[i].data.fill(0);
m_sector_buffers[i].size = 0;
}
UpdateStatusRegister();
}
bool CDROM::DoState(StateWrapper& sw)
{
sw.Do(&m_command);
sw.Do(&m_drive_state);
sw.Do(&m_status.bits);
sw.Do(&m_secondary_status.bits);
sw.Do(&m_mode.bits);
sw.Do(&m_current_double_speed);
sw.Do(&m_interrupt_enable_register);
sw.Do(&m_interrupt_flag_register);
sw.Do(&m_pending_async_interrupt);
sw.DoPOD(&m_setloc_position);
sw.DoPOD(&m_last_requested_sector);
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_xa_filter_file_number);
sw.Do(&m_xa_filter_channel_number);
sw.Do(&m_xa_current_file_number);
sw.Do(&m_xa_current_channel_number);
sw.Do(&m_xa_current_set);
sw.DoBytes(&m_last_sector_header, sizeof(m_last_sector_header));
sw.DoBytes(&m_last_sector_subheader, sizeof(m_last_sector_subheader));
sw.Do(&m_last_sector_header_valid);
sw.DoBytes(&m_last_subq, sizeof(m_last_subq));
sw.Do(&m_last_cdda_report_frame_nibble);
sw.Do(&m_cdda_report_delay);
sw.Do(&m_play_track_number_bcd);
sw.Do(&m_async_command_parameter);
sw.Do(&m_cd_audio_volume_matrix);
sw.Do(&m_next_cd_audio_volume_matrix);
sw.Do(&m_xa_last_samples);
sw.Do(&m_xa_resample_ring_buffer);
sw.Do(&m_xa_resample_p);
sw.Do(&m_xa_resample_sixstep);
sw.Do(&m_param_fifo);
sw.Do(&m_response_fifo);
sw.Do(&m_async_response_fifo);
sw.Do(&m_data_fifo);
sw.Do(&m_current_read_sector_buffer);
sw.Do(&m_current_write_sector_buffer);
for (u32 i = 0; i < NUM_SECTOR_BUFFERS; i++)
{
sw.Do(&m_sector_buffers[i].data);
sw.Do(&m_sector_buffers[i].size);
}
if (sw.IsReading())
{
if (m_reader.HasMedia())
m_reader.QueueReadSector(m_last_requested_sector);
UpdateCommandEvent();
m_drive_event->SetState(!IsDriveIdle());
}
return !sw.HasError();
}
bool CDROM::HasMedia() const
{
return m_reader.HasMedia();
}
std::string CDROM::GetMediaFileName() const
{
return m_reader.GetMediaFileName();
}
void CDROM::InsertMedia(std::unique_ptr<CDImage> media)
{
if (HasMedia())
RemoveMedia();
// set the region from the system area of the disc
m_disc_region = GameList::GetRegionForImage(media.get());
Log_InfoPrintf("Inserting new media, disc region: %s, console region: %s", Settings::GetDiscRegionName(m_disc_region),
Settings::GetConsoleRegionName(m_system->GetRegion()));
// motor automatically spins up
m_secondary_status.motor_on = true;
// reading TOC? interestingly this doesn't work for GetlocL though...
CDImage::SubChannelQ subq;
if (media->Seek(0) && media->ReadSubChannelQ(&subq) && subq.IsCRCValid())
m_last_subq = subq;
m_reader.SetMedia(std::move(media));
}
void CDROM::RemoveMedia(bool force /* = false */)
{
if (!m_reader.HasMedia() && !force)
return;
Log_InfoPrintf("Removing CD...");
m_reader.RemoveMedia();
m_last_sector_header_valid = false;
m_secondary_status.motor_on = false;
m_secondary_status.shell_open = true;
m_secondary_status.ClearActiveBits();
m_disc_region = DiscRegion::Other;
// If the drive was doing anything, we need to abort the command.
m_drive_state = DriveState::Idle;
m_command = Command::None;
m_command_event->Deactivate();
m_drive_event->Deactivate();
// The console sends an interrupt when the shell is opened regardless of whether a command was executing.
SendAsyncErrorResponse(STAT_ERROR, 0x08);
}
void CDROM::SetUseReadThread(bool enabled)
{
if (enabled == m_reader.IsUsingThread())
return;
if (enabled)
m_reader.StartThread();
else
m_reader.StopThread();
}
u8 CDROM::ReadRegister(u32 offset)
{
switch (offset)
{
case 0: // status register
Log_TracePrintf("CDROM read status register -> 0x%08X", m_status.bits);
return m_status.bits;
case 1: // always response FIFO
{
if (m_response_fifo.IsEmpty())
{
Log_DebugPrintf("Response FIFO empty on read");
return 0xFF;
}
const u8 value = m_response_fifo.Pop();
UpdateStatusRegister();
Log_DebugPrintf("CDROM read response FIFO -> 0x%08X", ZeroExtend32(value));
return value;
}
case 2: // always data FIFO
{
const u8 value = m_data_fifo.Pop();
UpdateStatusRegister();
Log_DebugPrintf("CDROM read data FIFO -> 0x%08X", ZeroExtend32(value));
return value;
}
case 3:
{
if (m_status.index & 1)
{
const u8 value = m_interrupt_flag_register | ~INTERRUPT_REGISTER_MASK;
Log_DebugPrintf("CDROM read interrupt flag register -> 0x%02X", ZeroExtend32(value));
return value;
}
else
{
const u8 value = m_interrupt_enable_register | ~INTERRUPT_REGISTER_MASK;
Log_DebugPrintf("CDROM read interrupt enable register -> 0x%02X", ZeroExtend32(value));
return value;
}
}
break;
}
Log_ErrorPrintf("Unknown CDROM register read: offset=0x%02X, index=%d", offset,
ZeroExtend32(m_status.index.GetValue()));
Panic("Unknown CDROM register");
return 0;
}
void CDROM::WriteRegister(u32 offset, u8 value)
{
if (offset == 0)
{
Log_TracePrintf("CDROM status register <- 0x%02X", value);
m_status.bits = (m_status.bits & static_cast<u8>(~3)) | (value & u8(3));
return;
}
const u32 reg = (m_status.index * 3u) + (offset - 1);
switch (reg)
{
case 0:
{
Log_DebugPrintf("CDROM command register <- 0x%02X", value);
if (HasPendingCommand())
{
Log_WarningPrintf("Cancelling pending command 0x%02X", static_cast<u8>(m_command));
AbortCommand();
}
BeginCommand(static_cast<Command>(value));
return;
}
case 1:
{
if (m_param_fifo.IsFull())
{
Log_WarningPrintf("Parameter FIFO overflow");
m_param_fifo.RemoveOne();
}
m_param_fifo.Push(value);
UpdateStatusRegister();
return;
}
case 2:
{
// TODO: sector buffer is not the data fifo
Log_DebugPrintf("Request register <- 0x%02X", value);
const RequestRegister rr{value};
Assert(!rr.SMEN);
if (rr.BFRD)
{
LoadDataFIFO();
}
else
{
Log_DebugPrintf("Clearing data FIFO");
m_data_fifo.Clear();
}
UpdateStatusRegister();
return;
}
case 3:
{
Log_ErrorPrintf("Sound map data out <- 0x%02X", value);
return;
}
case 4:
{
Log_DebugPrintf("Interrupt enable register <- 0x%02X", value);
m_interrupt_enable_register = value & INTERRUPT_REGISTER_MASK;
UpdateInterruptRequest();
return;
}
case 5:
{
Log_DebugPrintf("Interrupt flag register <- 0x%02X", value);
m_interrupt_flag_register &= ~(value & INTERRUPT_REGISTER_MASK);
if (m_interrupt_flag_register == 0)
{
if (HasPendingAsyncInterrupt())
DeliverAsyncInterrupt();
else
UpdateCommandEvent();
}
// Bit 6 clears the parameter FIFO.
if (value & 0x40)
{
m_param_fifo.Clear();
UpdateStatusRegister();
}
return;
}
case 6:
{
Log_ErrorPrintf("Sound map coding info <- 0x%02X", value);
return;
}
case 7:
{
Log_DebugPrintf("Audio volume for left-to-left output <- 0x%02X", value);
m_next_cd_audio_volume_matrix[0][0] = value;
return;
}
case 8:
{
Log_DebugPrintf("Audio volume for left-to-right output <- 0x%02X", value);
m_next_cd_audio_volume_matrix[0][1] = value;
return;
}
case 9:
{
Log_DebugPrintf("Audio volume for right-to-right output <- 0x%02X", value);
m_next_cd_audio_volume_matrix[1][1] = value;
return;
}
case 10:
{
Log_DebugPrintf("Audio volume for right-to-left output <- 0x%02X", value);
m_next_cd_audio_volume_matrix[1][0] = value;
return;
}
case 11:
{
Log_DebugPrintf("Audio volume apply changes <- 0x%02X", value);
m_adpcm_muted = ConvertToBoolUnchecked(value & u8(0x01));
if (value & 0x20)
m_cd_audio_volume_matrix = m_next_cd_audio_volume_matrix;
return;
}
default:
{
Log_ErrorPrintf("Unknown CDROM register write: offset=0x%02X, index=%d, reg=%u, value=0x%02X", offset,
m_status.index.GetValue(), reg, value);
return;
}
}
}
void CDROM::DMARead(u32* words, u32 word_count)
{
const u32 words_in_fifo = m_data_fifo.GetSize() / 4;
if (words_in_fifo < word_count)
{
Log_ErrorPrintf("DMA read on empty/near-empty data FIFO");
std::memset(words + words_in_fifo, 0, sizeof(u32) * (word_count - words_in_fifo));
}
const u32 bytes_to_read = std::min<u32>(word_count * sizeof(u32), m_data_fifo.GetSize());
m_data_fifo.PopRange(reinterpret_cast<u8*>(words), bytes_to_read);
}
void CDROM::SetInterrupt(Interrupt interrupt)
{
m_interrupt_flag_register = static_cast<u8>(interrupt);
UpdateInterruptRequest();
}
void CDROM::SetAsyncInterrupt(Interrupt interrupt)
{
if (m_interrupt_flag_register == static_cast<u8>(interrupt))
{
Log_WarningPrintf("Not setting async interrupt %u because there is already one unacknowledged",
static_cast<u8>(interrupt));
m_async_response_fifo.Clear();
return;
}
Assert(m_pending_async_interrupt == 0);
m_pending_async_interrupt = static_cast<u8>(interrupt);
if (!HasPendingInterrupt())
DeliverAsyncInterrupt();
}
void CDROM::ClearAsyncInterrupt()
{
m_pending_async_interrupt = 0;
m_async_response_fifo.Clear();
}
void CDROM::DeliverAsyncInterrupt()
{
Assert(m_pending_async_interrupt != 0 && !HasPendingInterrupt());
Log_DevPrintf("Delivering async interrupt %u", m_pending_async_interrupt);
m_response_fifo.Clear();
m_response_fifo.PushFromQueue(&m_async_response_fifo);
m_interrupt_flag_register = m_pending_async_interrupt;
m_pending_async_interrupt = 0;
UpdateInterruptRequest();
UpdateStatusRegister();
UpdateCommandEvent();
}
void CDROM::SendACKAndStat()
{
m_response_fifo.Push(m_secondary_status.bits);
SetInterrupt(Interrupt::ACK);
}
void CDROM::SendErrorResponse(u8 stat_bits /* = STAT_ERROR */, u8 reason /* = 0x80 */)
{
m_response_fifo.Push(m_secondary_status.bits | stat_bits);
m_response_fifo.Push(reason);
SetInterrupt(Interrupt::Error);
}
void CDROM::SendAsyncErrorResponse(u8 stat_bits /* = STAT_ERROR */, u8 reason /* = 0x80 */)
{
m_async_response_fifo.Push(m_secondary_status.bits | stat_bits);
m_async_response_fifo.Push(reason);
SetAsyncInterrupt(Interrupt::Error);
}
void CDROM::UpdateStatusRegister()
{
m_status.ADPBUSY = false;
m_status.PRMEMPTY = m_param_fifo.IsEmpty();
m_status.PRMWRDY = !m_param_fifo.IsFull();
m_status.RSLRRDY = !m_response_fifo.IsEmpty();
m_status.DRQSTS = !m_data_fifo.IsEmpty();
m_status.BUSYSTS = HasPendingCommand();
m_dma->SetRequest(DMA::Channel::CDROM, m_status.DRQSTS);
}
void CDROM::UpdateInterruptRequest()
{
if ((m_interrupt_flag_register & m_interrupt_enable_register) == 0)
return;
m_interrupt_controller->InterruptRequest(InterruptController::IRQ::CDROM);
}
TickCount CDROM::GetAckDelayForCommand(Command command)
{
if (command == Command::Init)
{
// Init takes longer.
return 120000;
}
// Tests show that the average time to acknowledge a command is significantly higher when a disc is in the drive,
// presumably because the controller is busy doing discy-things.
constexpr u32 default_ack_delay_no_disc = 20000;
constexpr u32 default_ack_delay_with_disc = 30000;
return HasMedia() ? default_ack_delay_with_disc : default_ack_delay_no_disc;
}
TickCount CDROM::GetTicksForRead()
{
return m_mode.double_speed ? (MASTER_CLOCK / 150) : (MASTER_CLOCK / 75);
}
TickCount CDROM::GetTicksForSeek(CDImage::LBA new_lba)
{
const CDImage::LBA current_lba = m_secondary_status.motor_on ? m_last_requested_sector : 0;
const u32 lba_diff = static_cast<u32>((new_lba > current_lba) ? (new_lba - current_lba) : (current_lba - new_lba));
// Formula from Mednafen.
TickCount ticks = std::max<TickCount>(20000, lba_diff * MASTER_CLOCK * 1000 / (72 * 60 * 75) / 1000);
if (!m_secondary_status.motor_on)
ticks += MASTER_CLOCK;
if (lba_diff >= 2550)
ticks += static_cast<TickCount>(u64(MASTER_CLOCK) * 300 / 1000);
else if (m_drive_state == DriveState::Idle) // paused
ticks += 1237952 << (BoolToUInt8(!m_mode.double_speed));
else if (lba_diff >= 3 && lba_diff < 12)
ticks += MASTER_CLOCK / (75 << (BoolToUInt8(!m_mode.double_speed)) << 2);
if (m_mode.double_speed != m_current_double_speed)
{
Log_DevPrintf("Switched from %s to %s speed", m_current_double_speed ? "double" : "single",
m_mode.double_speed ? "double" : "single");
m_current_double_speed = m_mode.double_speed;
// Approximate time for the motor to change speed?
ticks += static_cast<u32>(static_cast<double>(MASTER_CLOCK) * 0.1);
}
Log_DevPrintf("Seek time for %u LBAs: %d", lba_diff, ticks);
return ticks;
}
void CDROM::BeginCommand(Command command)
{
m_command = command;
m_command_event->Schedule(GetAckDelayForCommand(command));
UpdateCommandEvent();
UpdateStatusRegister();
}
void CDROM::EndCommand()
{
m_param_fifo.Clear();
m_command = Command::None;
m_command_event->Deactivate();
UpdateStatusRegister();
}
void CDROM::AbortCommand()
{
m_command = Command::None;
m_command_event->Deactivate();
UpdateStatusRegister();
}
void CDROM::ExecuteCommand()
{
Log_DevPrintf("CDROM executing command 0x%02X", ZeroExtend32(static_cast<u8>(m_command)));
if (!m_response_fifo.IsEmpty())
{
Log_DebugPrintf("Response FIFO not empty on command begin");
m_response_fifo.Clear();
}
switch (m_command)
{
case Command::Getstat:
{
Log_DebugPrintf("CDROM Getstat command");
// if bit 0 or 2 is set, send an additional byte
SendACKAndStat();
// shell open bit is cleared after sending the status
if (HasMedia())
m_secondary_status.shell_open = false;
EndCommand();
return;
}
case Command::Test:
{
const u8 subcommand = m_param_fifo.Pop();
ExecuteTestCommand(subcommand);
return;
}
case Command::GetID:
{
Log_DebugPrintf("CDROM GetID command");
SendACKAndStat();
m_drive_state = DriveState::ReadingID;
m_drive_event->Schedule(GetTicksForSeek(0) + GetTicksForRead());
EndCommand();
return;
}
case Command::ReadTOC:
{
Log_DebugPrintf("CDROM ReadTOC command");
if (!HasMedia())
{
SendErrorResponse(STAT_ERROR, 0x80);
}
else
{
SendACKAndStat();
m_drive_state = DriveState::ReadingTOC;
m_drive_event->Schedule(MASTER_CLOCK / 2); // half a second
}
EndCommand();
return;
}
case Command::Setfilter:
{
const u8 file = m_param_fifo.Peek(0);
const u8 channel = m_param_fifo.Peek(1);
Log_DebugPrintf("CDROM setfilter command 0x%02X 0x%02X", ZeroExtend32(file), ZeroExtend32(channel));
m_xa_filter_file_number = file;
m_xa_filter_channel_number = channel;
SendACKAndStat();
EndCommand();
return;
}
case Command::Setmode:
{
const u8 mode = m_param_fifo.Peek(0);
Log_DebugPrintf("CDROM setmode command 0x%02X", ZeroExtend32(mode));
m_mode.bits = mode;
SendACKAndStat();
EndCommand();
return;
}
case Command::Setloc:
{
// TODO: Verify parameter count
m_setloc_position.minute = PackedBCDToBinary(m_param_fifo.Peek(0));
m_setloc_position.second = PackedBCDToBinary(m_param_fifo.Peek(1));
m_setloc_position.frame = PackedBCDToBinary(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:
{
const bool logical = (m_command == Command::SeekL);
Log_DebugPrintf("CDROM %s command", logical ? "SeekL" : "SeekP");
if (!HasMedia())
{
SendErrorResponse(STAT_ERROR, 0x80);
}
else
{
SendACKAndStat();
BeginSeeking(logical, false, false);
}
EndCommand();
return;
}
case Command::SetSession:
{
const u8 session = m_param_fifo.IsEmpty() ? 0 : m_param_fifo.Peek(0);
Log_DebugPrintf("CDROM SetSession command, session=%u", session);
if (!HasMedia() || m_drive_state == DriveState::Reading || m_drive_state == DriveState::Playing)
{
SendErrorResponse(STAT_ERROR, 0x80);
}
else if (session == 0)
{
SendErrorResponse(STAT_ERROR, 0x10);
}
else
{
SendACKAndStat();
m_async_command_parameter = session;
m_drive_state = DriveState::ChangingSession;
m_drive_event->Schedule(MASTER_CLOCK / 2); // half a second
}
EndCommand();
return;
}
case Command::ReadN:
case Command::ReadS:
{
Log_DebugPrintf("CDROM read command");
if (!HasMedia())
{
SendErrorResponse(STAT_ERROR, 0x80);
}
else
{
SendACKAndStat();
BeginReading();
}
EndCommand();
return;
}
case Command::Play:
{
u8 track = m_param_fifo.IsEmpty() ? 0 : m_param_fifo.Peek(0);
Log_DebugPrintf("CDROM play command, track=%u", track);
if (!HasMedia())
{
SendErrorResponse(STAT_ERROR, 0x80);
}
else
{
SendACKAndStat();
BeginPlaying(track);
}
EndCommand();
return;
}
case Command::Pause:
{
if (m_secondary_status.seeking)
{
Log_WarningPrintf("CDROM Pause command while seeking - sending error response");
SendErrorResponse(STAT_ERROR, ERROR_NOT_READY);
EndCommand();
return;
}
// TODO: Should return an error if seeking.
const bool was_reading = (m_drive_state == DriveState::Reading || m_drive_state == DriveState::Playing);
const TickCount pause_time = was_reading ? (m_mode.double_speed ? 2000000 : 1000000) : 7000;
Log_DebugPrintf("CDROM pause command");
SendACKAndStat();
m_drive_state = DriveState::Pausing;
m_drive_event->Schedule(pause_time);
EndCommand();
return;
}
case Command::Stop:
{
const bool was_motor_on = m_secondary_status.motor_on;
const TickCount stop_time = was_motor_on ? (m_mode.double_speed ? 25000000 : 13000000) : 7000;
Log_DebugPrintf("CDROM stop command");
SendACKAndStat();
m_drive_state = DriveState::Stopping;
m_drive_event->Schedule(stop_time);
EndCommand();
return;
}
case Command::Reset:
{
Log_DebugPrintf("CDROM reset command");
SendACKAndStat();
m_drive_state = DriveState::Resetting;
m_drive_event->Schedule(400000);
EndCommand();
return;
}
break;
case Command::MotorOn:
{
Log_DebugPrintf("CDROM motor on command");
if (m_secondary_status.motor_on)
{
SendErrorResponse(STAT_ERROR, 0x20);
}
else
{
SendACKAndStat();
m_drive_state = DriveState::Resetting;
m_drive_event->Schedule(MASTER_CLOCK);
}
EndCommand();
return;
}
break;
case Command::Mute:
{
Log_DebugPrintf("CDROM mute command");
m_muted = true;
SendACKAndStat();
EndCommand();
}
break;
case Command::Demute:
{
Log_DebugPrintf("CDROM demute command");
m_muted = false;
SendACKAndStat();
EndCommand();
}
break;
case Command::GetlocL:
{
Log_DebugPrintf("CDROM GetlocL command - header %s [%02X:%02X:%02X]",
m_last_sector_header_valid ? "valid" : "invalid", m_last_sector_header.minute,
m_last_sector_header.second, m_last_sector_header.frame);
if (!m_last_sector_header_valid)
{
SendErrorResponse(STAT_ERROR, 0x80);
}
else
{
m_response_fifo.PushRange(reinterpret_cast<const u8*>(&m_last_sector_header), sizeof(m_last_sector_header));
m_response_fifo.PushRange(reinterpret_cast<const u8*>(&m_last_sector_subheader),
sizeof(m_last_sector_subheader));
SetInterrupt(Interrupt::ACK);
}
EndCommand();
return;
}
case Command::GetlocP:
{
if (!HasMedia())
{
Log_DebugPrintf("CDROM GetlocP command - not ready");
SendErrorResponse(STAT_ERROR, ERROR_NOT_READY);
}
else
{
Log_DebugPrintf("CDROM GetlocP command - T%02x I%02x R[%02x:%02x:%02x] A[%02x:%02x:%02x]",
m_last_subq.track_number_bcd, m_last_subq.index_number_bcd, m_last_subq.relative_minute_bcd,
m_last_subq.relative_second_bcd, m_last_subq.relative_frame_bcd,
m_last_subq.absolute_minute_bcd, m_last_subq.absolute_second_bcd,
m_last_subq.absolute_frame_bcd);
m_response_fifo.Push(m_last_subq.track_number_bcd);
m_response_fifo.Push(m_last_subq.index_number_bcd);
m_response_fifo.Push(m_last_subq.relative_minute_bcd);
m_response_fifo.Push(m_last_subq.relative_second_bcd);
m_response_fifo.Push(m_last_subq.relative_frame_bcd);
m_response_fifo.Push(m_last_subq.absolute_minute_bcd);
m_response_fifo.Push(m_last_subq.absolute_second_bcd);
m_response_fifo.Push(m_last_subq.absolute_frame_bcd);
SetInterrupt(Interrupt::ACK);
}
EndCommand();
return;
}
case Command::GetTN:
{
Log_DebugPrintf("CDROM GetTN command");
if (HasMedia())
{
m_reader.WaitForReadToComplete();
m_response_fifo.Push(m_secondary_status.bits);
m_response_fifo.Push(BinaryToBCD(Truncate8(m_reader.GetMedia()->GetFirstTrackNumber())));
m_response_fifo.Push(BinaryToBCD(Truncate8(m_reader.GetMedia()->GetLastTrackNumber())));
SetInterrupt(Interrupt::ACK);
}
else
{
SendErrorResponse(STAT_ERROR, 0x80);
}
EndCommand();
}
break;
case Command::GetTD:
{
Log_DebugPrintf("CDROM GetTD command");
Assert(m_param_fifo.GetSize() >= 1);
const u8 track = PackedBCDToBinary(m_param_fifo.Peek());
if (!HasMedia())
{
SendErrorResponse(STAT_ERROR, 0x80);
}
else if (track > m_reader.GetMedia()->GetTrackCount())
{
SendErrorResponse(STAT_ERROR, 0x10);
}
else
{
CDImage::Position pos;
if (track == 0)
pos = CDImage::Position::FromLBA(m_reader.GetMedia()->GetLBACount());
else
pos = m_reader.GetMedia()->GetTrackStartMSFPosition(track);
m_response_fifo.Push(m_secondary_status.bits);
m_response_fifo.Push(BinaryToBCD(Truncate8(pos.minute)));
m_response_fifo.Push(BinaryToBCD(Truncate8(pos.second)));
SetInterrupt(Interrupt::ACK);
}
EndCommand();
}
break;
case Command::Getparam:
{
Log_DebugPrintf("CDROM Getparam command");
m_response_fifo.Push(m_secondary_status.bits);
m_response_fifo.Push(m_mode.bits);
m_response_fifo.Push(0);
m_response_fifo.Push(m_xa_filter_file_number);
m_response_fifo.Push(m_xa_filter_channel_number);
SetInterrupt(Interrupt::ACK);
EndCommand();
}
break;
case Command::Sync:
{
Log_DebugPrintf("CDROM sync command");
SendErrorResponse(STAT_ERROR, 0x40);
EndCommand();
}
break;
default:
{
Log_ErrorPrintf("Unknown CDROM command 0x%04X with %u parameters, please report", static_cast<u16>(m_command),
m_param_fifo.GetSize());
Panic("Unknown CDROM command");
}
break;
}
}
void CDROM::ExecuteTestCommand(u8 subcommand)
{
switch (subcommand)
{
case 0x04: // Reset SCEx counters
{
Log_DebugPrintf("Reset SCEx counters");
m_secondary_status.motor_on = true;
m_response_fifo.Push(m_secondary_status.bits);
SetInterrupt(Interrupt::ACK);
EndCommand();
return;
}
case 0x05: // Read SCEx counters
{
Log_DebugPrintf("Read SCEx counters");
m_response_fifo.Push(m_secondary_status.bits);
m_response_fifo.Push(0); // # of TOC reads?
m_response_fifo.Push(0); // # of SCEx strings received
SetInterrupt(Interrupt::ACK);
EndCommand();
return;
}
case 0x20: // Get CDROM BIOS Date/Version
{
Log_DebugPrintf("Get CDROM BIOS Date/Version");
static constexpr u8 response[] = {0x95, 0x05, 0x16, 0xC1};
m_response_fifo.PushRange(response, countof(response));
SetInterrupt(Interrupt::ACK);
EndCommand();
return;
}
case 0x22:
{
Log_DebugPrintf("Get CDROM region ID string");
switch (m_system->GetRegion())
{
case ConsoleRegion::NTSC_J:
{
static constexpr u8 response[] = {'f', 'o', 'r', ' ', 'J', 'a', 'p', 'a', 'n'};
m_response_fifo.PushRange(response, countof(response));
}
break;
case ConsoleRegion::PAL:
{
static constexpr u8 response[] = {'f', 'o', 'r', ' ', 'E', 'u', 'r', 'o', 'p', 'e'};
m_response_fifo.PushRange(response, countof(response));
}
break;
case ConsoleRegion::NTSC_U:
default:
{
static constexpr u8 response[] = {'f', 'o', 'r', ' ', 'U', '/', 'C'};
m_response_fifo.PushRange(response, countof(response));
}
break;
}
SetInterrupt(Interrupt::ACK);
EndCommand();
return;
}
default:
{
Log_ErrorPrintf("Unknown test command 0x%02X, %u parameters", subcommand, m_param_fifo.GetSize());
Panic("Unknown test command");
return;
}
}
}
void CDROM::UpdateCommandEvent()
{
// if there's a pending interrupt, we can't execute the command yet
// so deactivate it until the interrupt is acknowledged
if (!HasPendingCommand() || HasPendingInterrupt())
{
m_command_event->Deactivate();
return;
}
else if (HasPendingCommand())
{
m_command_event->Activate();
}
}
void CDROM::ExecuteDrive(TickCount ticks_late)
{
switch (m_drive_state)
{
case DriveState::Resetting:
DoResetComplete(ticks_late);
break;
case DriveState::SeekingPhysical:
case DriveState::SeekingLogical:
DoSeekComplete(ticks_late);
break;
case DriveState::Pausing:
DoPauseComplete();
break;
case DriveState::Stopping:
DoStopComplete();
break;
case DriveState::ReadingID:
DoIDRead();
break;
case DriveState::ReadingTOC:
DoTOCRead();
break;
case DriveState::Reading:
case DriveState::Playing:
DoSectorRead();
break;
case DriveState::ChangingSession:
DoChangeSessionComplete();
break;
case DriveState::Idle:
default:
break;
}
}
void CDROM::BeginReading(TickCount ticks_late /* = 0 */, bool after_seek /* = false */)
{
Log_DebugPrintf("Starting reading @ LBA %u", m_last_requested_sector);
ClearSectorBuffers();
if (m_setloc_pending)
{
BeginSeeking(true, true, false);
return;
}
m_secondary_status.ClearActiveBits();
m_secondary_status.motor_on = true;
const TickCount ticks = GetTicksForRead();
const TickCount first_sector_ticks = ticks + (after_seek ? 0 : GetTicksForSeek(m_last_requested_sector)) - ticks_late;
m_drive_state = DriveState::Reading;
m_drive_event->SetInterval(ticks);
m_drive_event->Schedule(first_sector_ticks);
m_current_read_sector_buffer = 0;
m_current_write_sector_buffer = 0;
m_xa_current_file_number = 0;
m_xa_current_channel_number = 0;
m_xa_current_set = false;
m_reader.QueueReadSector(m_last_requested_sector);
}
void CDROM::BeginPlaying(u8 track_bcd, TickCount ticks_late /* = 0 */, bool after_seek /* = false */)
{
Log_DebugPrintf("Starting playing CDDA track %x", track_bcd);
m_last_cdda_report_frame_nibble = 0xFF;
m_cdda_report_delay = CDImage::FRAMES_PER_SECOND;
m_play_track_number_bcd = track_bcd;
// if track zero, start from current position
if (track_bcd != 0)
{
// play specific track?
if (track_bcd > m_reader.GetMedia()->GetTrackCount())
{
// restart current track
track_bcd = BinaryToBCD(Truncate8(m_reader.GetMedia()->GetTrackNumber()));
}
m_setloc_position = m_reader.GetMedia()->GetTrackStartMSFPosition(PackedBCDToBinary(track_bcd));
m_setloc_pending = true;
}
if (m_setloc_pending)
{
BeginSeeking(false, false, true);
return;
}
m_secondary_status.ClearActiveBits();
m_secondary_status.motor_on = true;
ClearSectorBuffers();
const TickCount ticks = GetTicksForRead();
const TickCount first_sector_ticks = ticks + (after_seek ? 0 : GetTicksForSeek(m_last_requested_sector)) - ticks_late;
m_drive_state = DriveState::Playing;
m_drive_event->SetInterval(ticks);
m_drive_event->Schedule(first_sector_ticks);
m_current_read_sector_buffer = 0;
m_current_write_sector_buffer = 0;
m_reader.QueueReadSector(m_last_requested_sector);
}
void CDROM::BeginSeeking(bool logical, bool read_after_seek, bool play_after_seek)
{
if (!m_setloc_pending)
Log_WarningPrintf("Seeking without setloc set");
m_read_after_seek = read_after_seek;
m_play_after_seek = play_after_seek;
m_setloc_pending = false;
Log_DebugPrintf("Seeking to [%02u:%02u:%02u] (LBA %u) (%s)", m_setloc_position.minute, m_setloc_position.second,
m_setloc_position.frame, m_setloc_position.ToLBA(), logical ? "logical" : "physical");
const CDImage::LBA seek_lba = m_setloc_position.ToLBA();
const TickCount seek_time = GetTicksForSeek(seek_lba);
m_secondary_status.ClearActiveBits();
m_secondary_status.motor_on = true;
m_secondary_status.seeking = true;
m_drive_state = logical ? DriveState::SeekingLogical : DriveState::SeekingPhysical;
m_drive_event->SetIntervalAndSchedule(seek_time);
m_last_requested_sector = seek_lba;
m_reader.QueueReadSector(m_last_requested_sector);
}
void CDROM::DoResetComplete(TickCount ticks_late)
{
m_drive_state = DriveState::Idle;
m_drive_event->Deactivate();
m_secondary_status.bits = 0;
m_secondary_status.motor_on = HasMedia();
m_mode.bits = 0;
m_mode.read_raw_sector = true;
if (!HasMedia())
{
Log_DevPrintf("CDROM reset - no disc");
m_secondary_status.shell_open = true;
SendAsyncErrorResponse(STAT_ERROR, 0x08);
return;
}
m_async_response_fifo.Clear();
m_async_response_fifo.Push(m_secondary_status.bits);
SetAsyncInterrupt(Interrupt::Complete);
if (!HasMedia())
{
m_secondary_status.motor_on = false;
m_secondary_status.shell_open = true;
}
}
void CDROM::DoSeekComplete(TickCount ticks_late)
{
const bool logical = (m_drive_state == DriveState::SeekingLogical);
m_drive_state = DriveState::Idle;
m_drive_event->Deactivate();
m_secondary_status.ClearActiveBits();
bool seek_okay = m_reader.WaitForReadToComplete();
if (seek_okay)
{
const CDImage::SubChannelQ& subq = m_reader.GetSectorSubQ();
if (subq.IsCRCValid())
{
// seek and update sub-q for ReadP command
m_last_subq = subq;
DebugAssert(m_last_requested_sector == m_reader.GetLastReadSector());
const auto [seek_mm, seek_ss, seek_ff] = CDImage::Position::FromLBA(m_last_requested_sector).ToBCD();
seek_okay = (subq.IsCRCValid() && subq.absolute_minute_bcd == seek_mm && subq.absolute_second_bcd == seek_ss &&
subq.absolute_frame_bcd == seek_ff);
if (seek_okay)
{
if (subq.control.data)
{
// ensure the location matches up (it should)
ProcessDataSectorHeader(m_reader.GetSectorBuffer().data());
seek_okay = (m_last_sector_header.minute == seek_mm && m_last_sector_header.second == seek_ss &&
m_last_sector_header.frame == seek_ff);
}
else
{
if (logical)
{
Log_WarningPrintf("Logical seek to non-data sector [%02x:%02x:%02x]", seek_mm, seek_ss, seek_ff);
seek_okay = false;
}
}
}
}
}
if (seek_okay)
{
// seek complete, transition to play/read if requested
// INT2 is not sent on play/read
if (m_read_after_seek)
{
BeginReading(ticks_late, true);
}
else if (m_play_after_seek)
{
BeginPlaying(0, ticks_late, true);
}
else
{
m_async_response_fifo.Push(m_secondary_status.bits);
SetAsyncInterrupt(Interrupt::Complete);
}
}
else
{
CDImage::Position pos(CDImage::Position::FromLBA(m_last_requested_sector));
Log_WarningPrintf("%s seek to [%02u:%02u:%02u] failed", logical ? "Logical" : "Physical", pos.minute, pos.second,
pos.frame);
SendAsyncErrorResponse(STAT_SEEK_ERROR, 0x04);
m_last_sector_header_valid = false;
}
m_setloc_pending = false;
m_read_after_seek = false;
m_play_after_seek = false;
UpdateStatusRegister();
}
void CDROM::DoPauseComplete()
{
Log_DebugPrintf("Pause complete");
m_drive_state = DriveState::Idle;
m_drive_event->Deactivate();
m_secondary_status.ClearActiveBits();
m_async_response_fifo.Clear();
m_async_response_fifo.Push(m_secondary_status.bits);
SetAsyncInterrupt(Interrupt::Complete);
}
void CDROM::DoStopComplete()
{
Log_DebugPrintf("Stop complete");
m_drive_state = DriveState::Idle;
m_drive_event->Deactivate();
m_secondary_status.ClearActiveBits();
m_secondary_status.motor_on = false;
m_async_response_fifo.Clear();
m_async_response_fifo.Push(m_secondary_status.bits);
SetAsyncInterrupt(Interrupt::Complete);
}
void CDROM::DoChangeSessionComplete()
{
Log_DebugPrintf("Changing session complete");
m_drive_state = DriveState::Idle;
m_drive_event->Deactivate();
m_secondary_status.ClearActiveBits();
m_secondary_status.motor_on = true;
m_async_response_fifo.Clear();
if (m_async_command_parameter == 0x01)
{
m_async_response_fifo.Push(m_secondary_status.bits);
SetAsyncInterrupt(Interrupt::Complete);
}
else
{
// we don't emulate multisession discs.. for now
SendAsyncErrorResponse(STAT_SEEK_ERROR, 0x40);
}
}
void CDROM::DoIDRead()
{
Log_DebugPrintf("ID read complete");
m_drive_state = DriveState::Idle;
m_drive_event->Deactivate();
m_secondary_status.ClearActiveBits();
m_secondary_status.motor_on = HasMedia();
// TODO: Audio CD.
u8 stat_byte = m_secondary_status.bits;
u8 flags_byte = 0;
if (!HasMedia())
{
flags_byte |= (1 << 6); // Disc Missing
}
else
{
// this is where it would get read from the start of the disc?
m_last_requested_sector = 0;
m_reader.QueueReadSector(m_last_requested_sector);
if (m_system->GetSettings().cdrom_region_check &&
(m_disc_region == DiscRegion::Other ||
m_system->GetRegion() != System::GetConsoleRegionForDiscRegion(m_disc_region)))
{
stat_byte |= STAT_ID_ERROR;
flags_byte |= (1 << 7); // Unlicensed
}
}
m_async_response_fifo.Clear();
m_async_response_fifo.Push(stat_byte);
m_async_response_fifo.Push(flags_byte);
m_async_response_fifo.Push(0x20); // TODO: Disc type from TOC
m_async_response_fifo.Push(0x00); // TODO: Session info?
static constexpr u32 REGION_STRING_LENGTH = 4;
static constexpr std::array<std::array<u8, REGION_STRING_LENGTH>, static_cast<size_t>(DiscRegion::Count)>
region_strings = {{{'S', 'C', 'E', 'I'}, {'S', 'C', 'E', 'A'}, {'S', 'C', 'E', 'E'}, {0, 0, 0, 0}}};
m_async_response_fifo.PushRange(region_strings[static_cast<u8>(m_disc_region)].data(), REGION_STRING_LENGTH);
SetAsyncInterrupt((flags_byte != 0) ? Interrupt::Error : Interrupt::Complete);
}
void CDROM::DoTOCRead()
{
Log_DebugPrintf("TOC read complete");
m_drive_state = DriveState::Idle;
m_drive_event->Deactivate();
m_async_response_fifo.Clear();
m_async_response_fifo.Push(m_secondary_status.bits);
SetAsyncInterrupt(Interrupt::Complete);
}
void CDROM::DoSectorRead()
{
if (!m_reader.WaitForReadToComplete())
Panic("Sector read failed");
// TODO: Error handling
// TODO: Check SubQ checksum.
const CDImage::SubChannelQ& subq = m_reader.GetSectorSubQ();
const bool is_data_sector = subq.control.data;
if (!is_data_sector)
{
if (m_play_track_number_bcd == 0)
{
// track number was not specified, but we've found the track now
m_play_track_number_bcd = subq.track_number_bcd;
Log_DebugPrintf("Setting playing track number to %u", m_play_track_number_bcd);
}
else if (m_mode.auto_pause && subq.track_number_bcd != m_play_track_number_bcd)
{
// we don't want to update the position if the track changes, so we check it before reading the actual sector.
Log_DevPrintf("Auto pause at the end of track %u (LBA %u)", m_play_track_number_bcd,
m_reader.GetLastReadSector());
ClearAsyncInterrupt();
m_async_response_fifo.Push(m_secondary_status.bits);
SetAsyncInterrupt(Interrupt::DataEnd);
m_secondary_status.ClearActiveBits();
m_drive_state = DriveState::Idle;
m_drive_event->Deactivate();
return;
}
}
else
{
ProcessDataSectorHeader(m_reader.GetSectorBuffer().data());
}
if (subq.IsCRCValid())
{
m_last_subq = subq;
}
else
{
const CDImage::Position pos(CDImage::Position::FromLBA(m_reader.GetLastReadSector()));
Log_DevPrintf("Sector %u [%02u:%02u:%02u] has invalid subchannel Q", m_reader.GetLastReadSector(), pos.minute,
pos.second, pos.frame);
}
if (is_data_sector && m_drive_state == DriveState::Reading)
{
ProcessDataSector(m_reader.GetSectorBuffer().data(), subq);
}
else if (!is_data_sector && m_drive_state == DriveState::Playing)
{
ProcessCDDASector(m_reader.GetSectorBuffer().data(), subq);
}
else if (m_drive_state != DriveState::Reading && m_drive_state != DriveState::Playing)
{
Panic("Not reading or playing");
}
else
{
Log_WarningPrintf("Skipping sector %u as it is a %s sector and we're not %s", m_reader.GetLastReadSector(),
is_data_sector ? "data" : "audio", is_data_sector ? "reading" : "playing");
}
m_last_requested_sector++;
m_reader.QueueReadSector(m_last_requested_sector);
}
void CDROM::ProcessDataSectorHeader(const u8* raw_sector)
{
std::memcpy(&m_last_sector_header, &raw_sector[SECTOR_SYNC_SIZE], sizeof(m_last_sector_header));
std::memcpy(&m_last_sector_subheader, &raw_sector[SECTOR_SYNC_SIZE + sizeof(m_last_sector_header)],
sizeof(m_last_sector_subheader));
m_last_sector_header_valid = true;
}
void CDROM::ProcessDataSector(const u8* raw_sector, const CDImage::SubChannelQ& subq)
{
Log_DevPrintf("Read sector %u: mode %u submode 0x%02X into buffer %u", m_last_requested_sector,
ZeroExtend32(m_last_sector_header.sector_mode), ZeroExtend32(m_last_sector_subheader.submode.bits),
m_current_write_sector_buffer);
// The reading bit shouldn't be set until the first sector is processed.
m_secondary_status.reading = true;
if (m_mode.xa_enable && m_last_sector_header.sector_mode == 2)
{
if (m_last_sector_subheader.submode.realtime && m_last_sector_subheader.submode.audio)
{
ProcessXAADPCMSector(raw_sector, subq);
// Audio+realtime sectors aren't delivered to the CPU.
return;
}
}
// TODO: How does XA relate to this buffering?
SectorBuffer* sb = &m_sector_buffers[m_current_write_sector_buffer];
m_current_write_sector_buffer = (m_current_write_sector_buffer + 1) % NUM_SECTOR_BUFFERS;
if (sb->size > 0)
{
Log_DevPrintf("Sector buffer %u was not read, previous sector dropped",
(m_current_write_sector_buffer - 1) % NUM_SECTOR_BUFFERS);
}
if (m_mode.ignore_bit)
Log_WarningPrintf("SetMode.4 bit set on read of sector %u", m_last_requested_sector);
if (m_mode.read_raw_sector)
{
std::memcpy(sb->data.data(), raw_sector + SECTOR_SYNC_SIZE, RAW_SECTOR_OUTPUT_SIZE);
sb->size = RAW_SECTOR_OUTPUT_SIZE;
}
else
{
// TODO: This should actually depend on the mode...
Assert(m_last_sector_header.sector_mode == 2);
std::memcpy(sb->data.data(), raw_sector + CDImage::SECTOR_SYNC_SIZE + 12, DATA_SECTOR_OUTPUT_SIZE);
sb->size = DATA_SECTOR_OUTPUT_SIZE;
}
// Deliver to CPU
if (HasPendingAsyncInterrupt())
{
Log_WarningPrintf("Data interrupt was not delivered");
ClearAsyncInterrupt();
}
m_async_response_fifo.Push(m_secondary_status.bits);
SetAsyncInterrupt(Interrupt::DataReady);
}
static std::array<std::array<s16, 29>, 7> s_zigzag_table = {
{{0, 0x0, 0x0, 0x0, 0x0, -0x0002, 0x000A, -0x0022, 0x0041, -0x0054,
0x0034, 0x0009, -0x010A, 0x0400, -0x0A78, 0x234C, 0x6794, -0x1780, 0x0BCD, -0x0623,
0x0350, -0x016D, 0x006B, 0x000A, -0x0010, 0x0011, -0x0008, 0x0003, -0x0001},
{0, 0x0, 0x0, -0x0002, 0x0, 0x0003, -0x0013, 0x003C, -0x004B, 0x00A2,
-0x00E3, 0x0132, -0x0043, -0x0267, 0x0C9D, 0x74BB, -0x11B4, 0x09B8, -0x05BF, 0x0372,
-0x01A8, 0x00A6, -0x001B, 0x0005, 0x0006, -0x0008, 0x0003, -0x0001, 0x0},
{0, 0x0, -0x0001, 0x0003, -0x0002, -0x0005, 0x001F, -0x004A, 0x00B3, -0x0192,
0x02B1, -0x039E, 0x04F8, -0x05A6, 0x7939, -0x05A6, 0x04F8, -0x039E, 0x02B1, -0x0192,
0x00B3, -0x004A, 0x001F, -0x0005, -0x0002, 0x0003, -0x0001, 0x0, 0x0},
{0, -0x0001, 0x0003, -0x0008, 0x0006, 0x0005, -0x001B, 0x00A6, -0x01A8, 0x0372,
-0x05BF, 0x09B8, -0x11B4, 0x74BB, 0x0C9D, -0x0267, -0x0043, 0x0132, -0x00E3, 0x00A2,
-0x004B, 0x003C, -0x0013, 0x0003, 0x0, -0x0002, 0x0, 0x0, 0x0},
{-0x0001, 0x0003, -0x0008, 0x0011, -0x0010, 0x000A, 0x006B, -0x016D, 0x0350, -0x0623,
0x0BCD, -0x1780, 0x6794, 0x234C, -0x0A78, 0x0400, -0x010A, 0x0009, 0x0034, -0x0054,
0x0041, -0x0022, 0x000A, -0x0001, 0x0, 0x0001, 0x0, 0x0, 0x0},
{0x0002, -0x0008, 0x0010, -0x0023, 0x002B, 0x001A, -0x00EB, 0x027B, -0x0548, 0x0AFA,
-0x16FA, 0x53E0, 0x3C07, -0x1249, 0x080E, -0x0347, 0x015B, -0x0044, -0x0017, 0x0046,
-0x0023, 0x0011, -0x0005, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
{-0x0005, 0x0011, -0x0023, 0x0046, -0x0017, -0x0044, 0x015B, -0x0347, 0x080E, -0x1249,
0x3C07, 0x53E0, -0x16FA, 0x0AFA, -0x0548, 0x027B, -0x00EB, 0x001A, 0x002B, -0x0023,
0x0010, -0x0008, 0x0002, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}}};
static s16 ZigZagInterpolate(const s16* ringbuf, const s16* table, u8 p)
{
s32 sum = 0;
for (u8 i = 0; i < 29; i++)
sum += (s32(ringbuf[(p - i) & 0x1F]) * s32(table[i])) / 0x8000;
return static_cast<s16>(std::clamp<s32>(sum, -0x8000, 0x7FFF));
}
static constexpr s32 ApplyVolume(s16 sample, u8 volume)
{
return s32(sample) * static_cast<s32>(ZeroExtend32(volume)) >> 7;
}
static constexpr s16 SaturateVolume(s32 volume)
{
return static_cast<s16>(std::clamp<s32>(volume, -0x8000, 0x7FFF));
}
template<bool STEREO, bool SAMPLE_RATE>
static void ResampleXAADPCM(const s16* frames_in, u32 num_frames_in, SPU* spu, s16* left_ringbuf, s16* right_ringbuf,
u8* p_ptr, u8* sixstep_ptr, const std::array<std::array<u8, 2>, 2>& volume_matrix)
{
u8 p = *p_ptr;
u8 sixstep = *sixstep_ptr;
spu->EnsureCDAudioSpace(((num_frames_in * 7) / 6) << BoolToUInt8(SAMPLE_RATE));
for (u32 in_sample_index = 0; in_sample_index < num_frames_in; in_sample_index++)
{
const s16 left = *(frames_in++);
const s16 right = STEREO ? *(frames_in++) : left;
if constexpr (!STEREO)
{
UNREFERENCED_VARIABLE(right);
}
for (u32 sample_dup = 0; sample_dup < (SAMPLE_RATE ? 2 : 1); sample_dup++)
{
left_ringbuf[p] = left;
if constexpr (STEREO)
right_ringbuf[p] = right;
p = (p + 1) % 32;
sixstep--;
if (sixstep == 0)
{
sixstep = 6;
for (u32 j = 0; j < 7; j++)
{
const s16 left_interp = ZigZagInterpolate(left_ringbuf, s_zigzag_table[j].data(), p);
const s16 right_interp = STEREO ? ZigZagInterpolate(right_ringbuf, s_zigzag_table[j].data(), p) : left_interp;
const s16 left_out = SaturateVolume(ApplyVolume(left_interp, volume_matrix[0][0]) +
ApplyVolume(right_interp, volume_matrix[1][0]));
const s16 right_out = SaturateVolume(ApplyVolume(left_interp, volume_matrix[0][1]) +
ApplyVolume(right_interp, volume_matrix[1][1]));
spu->AddCDAudioSample(left_out, right_out);
}
}
}
}
*p_ptr = p;
*sixstep_ptr = sixstep;
}
void CDROM::ResetCurrentXAFile()
{
m_xa_current_channel_number = 0;
m_xa_current_file_number = 0;
m_xa_current_set = false;
}
void CDROM::ProcessXAADPCMSector(const u8* raw_sector, const CDImage::SubChannelQ& subq)
{
// Check for automatic ADPCM filter.
if (m_mode.xa_filter && (m_last_sector_subheader.file_number != m_xa_filter_file_number ||
m_last_sector_subheader.channel_number != m_xa_filter_channel_number))
{
Log_DebugPrintf("Skipping sector due to filter mismatch (expected %u/%u got %u/%u)", m_xa_filter_file_number,
m_xa_filter_channel_number, m_last_sector_subheader.file_number,
m_last_sector_subheader.channel_number);
return;
}
// Track the current file being played. If this is not set by the filter, it'll be set by the first file/sector which
// is read. Fixes audio in Tomb Raider III menu.
if (!m_xa_current_set)
{
m_xa_current_file_number = m_last_sector_subheader.file_number;
m_xa_current_channel_number = m_last_sector_subheader.channel_number;
m_xa_current_set = true;
}
else if (m_last_sector_subheader.file_number != m_xa_current_file_number ||
m_last_sector_subheader.channel_number != m_xa_current_channel_number)
{
Log_DebugPrintf("Skipping sector due to current file mismatch (expected %u/%u got %u/%u)", m_xa_current_file_number,
m_xa_current_channel_number, m_last_sector_subheader.file_number,
m_last_sector_subheader.channel_number);
return;
}
// Reset current file on EOF, and play the file in the next sector.
if (m_last_sector_subheader.submode.eof)
ResetCurrentXAFile();
std::array<s16, CDXA::XA_ADPCM_SAMPLES_PER_SECTOR_4BIT> sample_buffer;
CDXA::DecodeADPCMSector(raw_sector, sample_buffer.data(), m_xa_last_samples.data());
// Only send to SPU if we're not muted.
if (m_muted || m_adpcm_muted)
return;
m_spu->GeneratePendingSamples();
if (m_last_sector_subheader.codinginfo.IsStereo())
{
const u32 num_samples = m_last_sector_subheader.codinginfo.GetSamplesPerSector() / 2;
if (m_last_sector_subheader.codinginfo.IsHalfSampleRate())
{
ResampleXAADPCM<true, true>(sample_buffer.data(), num_samples, m_spu, m_xa_resample_ring_buffer[0].data(),
m_xa_resample_ring_buffer[1].data(), &m_xa_resample_p, &m_xa_resample_sixstep,
m_cd_audio_volume_matrix);
}
else
{
ResampleXAADPCM<true, false>(sample_buffer.data(), num_samples, m_spu, m_xa_resample_ring_buffer[0].data(),
m_xa_resample_ring_buffer[1].data(), &m_xa_resample_p, &m_xa_resample_sixstep,
m_cd_audio_volume_matrix);
}
}
else
{
const u32 num_samples = m_last_sector_subheader.codinginfo.GetSamplesPerSector();
if (m_last_sector_subheader.codinginfo.IsHalfSampleRate())
{
ResampleXAADPCM<false, true>(sample_buffer.data(), num_samples, m_spu, m_xa_resample_ring_buffer[0].data(),
m_xa_resample_ring_buffer[1].data(), &m_xa_resample_p, &m_xa_resample_sixstep,
m_cd_audio_volume_matrix);
}
else
{
ResampleXAADPCM<false, false>(sample_buffer.data(), num_samples, m_spu, m_xa_resample_ring_buffer[0].data(),
m_xa_resample_ring_buffer[1].data(), &m_xa_resample_p, &m_xa_resample_sixstep,
m_cd_audio_volume_matrix);
}
}
}
void CDROM::ProcessCDDASector(const u8* raw_sector, const CDImage::SubChannelQ& subq)
{
// For CDDA sectors, the whole sector contains the audio data.
Log_DevPrintf("Read sector %u as CDDA", m_last_requested_sector);
m_secondary_status.playing_cdda = true;
// Skip the pregap, and don't report on it.
if (subq.index_number_bcd == 0)
return;
if (m_mode.report_audio)
{
const u8 frame_nibble = subq.absolute_frame_bcd >> 4;
if (m_last_cdda_report_frame_nibble != frame_nibble && (m_cdda_report_delay == 0 || --m_cdda_report_delay == 0))
{
m_last_cdda_report_frame_nibble = frame_nibble;
Log_DebugPrintf("CDDA report at track[%02x] index[%02x] rel[%02x:%02x:%02x]", subq.track_number_bcd,
subq.index_number_bcd, subq.relative_minute_bcd, subq.relative_second_bcd,
subq.relative_frame_bcd);
ClearAsyncInterrupt();
m_async_response_fifo.Push(m_secondary_status.bits);
m_async_response_fifo.Push(subq.track_number_bcd);
m_async_response_fifo.Push(subq.index_number_bcd);
if (subq.absolute_frame_bcd & 0x10)
{
m_async_response_fifo.Push(subq.relative_minute_bcd);
m_async_response_fifo.Push(0x80 | subq.relative_second_bcd);
m_async_response_fifo.Push(subq.relative_frame_bcd);
}
else
{
m_async_response_fifo.Push(subq.absolute_minute_bcd);
m_async_response_fifo.Push(subq.absolute_second_bcd);
m_async_response_fifo.Push(subq.absolute_frame_bcd);
}
m_async_response_fifo.Push(0); // peak low
m_async_response_fifo.Push(0); // peak high
SetAsyncInterrupt(Interrupt::DataReady);
}
}
// Apply volume when pushing sectors to SPU.
if (m_muted)
return;
m_spu->GeneratePendingSamples();
constexpr bool is_stereo = true;
constexpr u32 num_samples = CDImage::RAW_SECTOR_SIZE / sizeof(s16) / (is_stereo ? 2 : 1);
m_spu->EnsureCDAudioSpace(num_samples);
const u8* sector_ptr = raw_sector;
for (u32 i = 0; i < num_samples; i++)
{
s16 samp_left, samp_right;
std::memcpy(&samp_left, sector_ptr, sizeof(samp_left));
std::memcpy(&samp_right, sector_ptr + sizeof(s16), sizeof(samp_right));
sector_ptr += sizeof(s16) * 2;
const s16 left = SaturateVolume(ApplyVolume(samp_left, m_cd_audio_volume_matrix[0][0]) +
ApplyVolume(samp_right, m_cd_audio_volume_matrix[1][0]));
const s16 right = SaturateVolume(ApplyVolume(samp_left, m_cd_audio_volume_matrix[0][1]) +
ApplyVolume(samp_right, m_cd_audio_volume_matrix[1][1]));
m_spu->AddCDAudioSample(left, right);
}
}
void CDROM::LoadDataFIFO()
{
if (!m_data_fifo.IsEmpty())
{
Log_DevPrintf("Load data fifo when not empty");
return;
}
// any data to load?
SectorBuffer& sb = m_sector_buffers[m_current_read_sector_buffer];
if (sb.size == 0)
{
Log_WarningPrintf("Attempting to load empty sector buffer");
m_data_fifo.PushRange(sb.data.data(), RAW_SECTOR_OUTPUT_SIZE);
}
else
{
m_data_fifo.PushRange(sb.data.data(), sb.size);
sb.size = 0;
}
Log_DevPrintf("Loaded %u bytes to data FIFO from buffer %u", m_data_fifo.GetSize(), m_current_read_sector_buffer);
m_current_read_sector_buffer = m_current_write_sector_buffer;
}
void CDROM::ClearSectorBuffers()
{
for (u32 i = 0; i < NUM_SECTOR_BUFFERS; i++)
m_sector_buffers[i].size = 0;
}
void CDROM::DrawDebugWindow()
{
static const ImVec4 active_color{1.0f, 1.0f, 1.0f, 1.0f};
static const ImVec4 inactive_color{0.4f, 0.4f, 0.4f, 1.0f};
const float framebuffer_scale = ImGui::GetIO().DisplayFramebufferScale.x;
ImGui::SetNextWindowSize(ImVec2(800.0f * framebuffer_scale, 500.0f * framebuffer_scale), ImGuiCond_FirstUseEver);
if (!ImGui::Begin("CDROM State", &m_system->GetSettings().debugging.show_cdrom_state))
{
ImGui::End();
return;
}
// draw voice states
if (ImGui::CollapsingHeader("Media", ImGuiTreeNodeFlags_DefaultOpen))
{
if (HasMedia())
{
const CDImage* media = m_reader.GetMedia();
const auto [disc_minute, disc_second, disc_frame] = media->GetMSFPositionOnDisc();
const auto [track_minute, track_second, track_frame] = media->GetMSFPositionInTrack();
ImGui::Text("Filename: %s", media->GetFileName().c_str());
ImGui::Text("Disc Position: MSF[%02u:%02u:%02u] LBA[%u]", disc_minute, disc_second, disc_frame,
media->GetPositionOnDisc());
ImGui::Text("Track Position: Number[%u] MSF[%02u:%02u:%02u] LBA[%u]", media->GetTrackNumber(), track_minute,
track_second, track_frame, media->GetPositionInTrack());
ImGui::Text("Last Sector: %02X:%02X:%02X (Mode %u)", m_last_sector_header.minute, m_last_sector_header.second,
m_last_sector_header.frame, m_last_sector_header.sector_mode);
}
else
{
ImGui::Text("No media inserted.");
}
}
if (ImGui::CollapsingHeader("Status/Mode", ImGuiTreeNodeFlags_DefaultOpen))
{
static constexpr std::array<const char*, 11> drive_state_names = {
{"Idle", "Resetting", "Seeking (Physical)", "Seeking (Logical)", "Reading ID", "Reading TOC", "Reading",
"Playing", "Pausing", "Stopping", "Changing Session"}};
ImGui::Columns(3);
ImGui::Text("Status");
ImGui::NextColumn();
ImGui::Text("Secondary Status");
ImGui::NextColumn();
ImGui::Text("Mode Status");
ImGui::NextColumn();
ImGui::TextColored(m_status.ADPBUSY ? active_color : inactive_color, "ADPBUSY: %s",
m_status.ADPBUSY ? "Yes" : "No");
ImGui::NextColumn();
ImGui::TextColored(m_secondary_status.error ? active_color : inactive_color, "Error: %s",
m_secondary_status.error ? "Yes" : "No");
ImGui::NextColumn();
ImGui::TextColored(m_mode.cdda ? active_color : inactive_color, "CDDA: %s", m_mode.cdda ? "Yes" : "No");
ImGui::NextColumn();
ImGui::TextColored(m_status.PRMEMPTY ? active_color : inactive_color, "PRMEMPTY: %s",
m_status.PRMEMPTY ? "Yes" : "No");
ImGui::NextColumn();
ImGui::TextColored(m_secondary_status.motor_on ? active_color : inactive_color, "Motor On: %s",
m_secondary_status.motor_on ? "Yes" : "No");
ImGui::NextColumn();
ImGui::TextColored(m_mode.auto_pause ? active_color : inactive_color, "Auto Pause: %s",
m_mode.auto_pause ? "Yes" : "No");
ImGui::NextColumn();
ImGui::TextColored(m_status.PRMWRDY ? active_color : inactive_color, "PRMWRDY: %s",
m_status.PRMWRDY ? "Yes" : "No");
ImGui::NextColumn();
ImGui::TextColored(m_secondary_status.seek_error ? active_color : inactive_color, "Seek Error: %s",
m_secondary_status.seek_error ? "Yes" : "No");
ImGui::NextColumn();
ImGui::TextColored(m_mode.report_audio ? active_color : inactive_color, "Report Audio: %s",
m_mode.report_audio ? "Yes" : "No");
ImGui::NextColumn();
ImGui::TextColored(m_status.RSLRRDY ? active_color : inactive_color, "RSLRRDY: %s",
m_status.RSLRRDY ? "Yes" : "No");
ImGui::NextColumn();
ImGui::TextColored(m_secondary_status.id_error ? active_color : inactive_color, "ID Error: %s",
m_secondary_status.id_error ? "Yes" : "No");
ImGui::NextColumn();
ImGui::TextColored(m_mode.xa_filter ? active_color : inactive_color, "XA Filter: %s (File %u Channel %u)",
m_mode.xa_filter ? "Yes" : "No", m_xa_filter_file_number, m_xa_filter_channel_number);
ImGui::NextColumn();
ImGui::TextColored(m_status.DRQSTS ? active_color : inactive_color, "DRQSTS: %s", m_status.DRQSTS ? "Yes" : "No");
ImGui::NextColumn();
ImGui::TextColored(m_secondary_status.shell_open ? active_color : inactive_color, "Shell Open: %s",
m_secondary_status.shell_open ? "Yes" : "No");
ImGui::NextColumn();
ImGui::TextColored(m_mode.ignore_bit ? active_color : inactive_color, "Ignore Bit: %s",
m_mode.ignore_bit ? "Yes" : "No");
ImGui::NextColumn();
ImGui::TextColored(m_status.BUSYSTS ? active_color : inactive_color, "BUSYSTS: %s",
m_status.BUSYSTS ? "Yes" : "No");
ImGui::NextColumn();
ImGui::TextColored(m_secondary_status.reading ? active_color : inactive_color, "Reading: %s",
m_secondary_status.reading ? "Yes" : "No");
ImGui::NextColumn();
ImGui::TextColored(m_mode.read_raw_sector ? active_color : inactive_color, "Read Raw Sectors: %s",
m_mode.read_raw_sector ? "Yes" : "No");
ImGui::NextColumn();
ImGui::NextColumn();
ImGui::TextColored(m_secondary_status.seeking ? active_color : inactive_color, "Seeking: %s",
m_secondary_status.seeking ? "Yes" : "No");
ImGui::NextColumn();
ImGui::TextColored(m_mode.xa_enable ? active_color : inactive_color, "XA Enable: %s",
m_mode.xa_enable ? "Yes" : "No");
ImGui::NextColumn();
ImGui::NextColumn();
ImGui::TextColored(m_secondary_status.playing_cdda ? active_color : inactive_color, "Playing CDDA: %s",
m_secondary_status.playing_cdda ? "Yes" : "No");
ImGui::NextColumn();
ImGui::TextColored(m_mode.double_speed ? active_color : inactive_color, "Double Speed: %s",
m_mode.double_speed ? "Yes" : "No");
ImGui::NextColumn();
ImGui::Columns(1);
ImGui::NewLine();
if (HasPendingCommand())
{
ImGui::TextColored(active_color, "Command: 0x%02X (%d ticks remaining)", static_cast<u8>(m_command),
m_command_event->IsActive() ? m_command_event->GetTicksUntilNextExecution() : 0);
}
else
{
ImGui::TextColored(inactive_color, "Command: None");
}
if (IsDriveIdle())
{
ImGui::TextColored(inactive_color, "Drive: Idle");
}
else
{
ImGui::TextColored(active_color, "Drive: %s (%d ticks remaining)",
drive_state_names[static_cast<u8>(m_drive_state)],
m_drive_event->IsActive() ? m_drive_event->GetTicksUntilNextExecution() : 0);
}
ImGui::Text("Interrupt Enable Register: 0x%02X", m_interrupt_enable_register);
ImGui::Text("Interrupt Flag Register: 0x%02X", m_interrupt_flag_register);
}
if (ImGui::CollapsingHeader("CD Audio", ImGuiTreeNodeFlags_DefaultOpen))
{
if (m_drive_state == DriveState::Reading && m_mode.xa_enable)
{
ImGui::TextColored(active_color, "Playing: XA-ADPCM (File %u / Channel %u)", m_xa_current_file_number,
m_xa_current_channel_number);
}
else if (m_drive_state == DriveState::Playing)
{
ImGui::TextColored(active_color, "Playing: CDDA (Track %x)", m_last_subq.track_number_bcd);
}
else
{
ImGui::TextColored(inactive_color, "Playing: Inactive");
}
ImGui::TextColored(m_muted ? inactive_color : active_color, "Muted: %s", m_muted ? "Yes" : "No");
ImGui::Text("Left Output: Left Channel=%02X (%u%%), Right Channel=%02X (%u%%)", m_cd_audio_volume_matrix[0][0],
ZeroExtend32(m_cd_audio_volume_matrix[0][0]) * 100 / 0x80, m_cd_audio_volume_matrix[1][0],
ZeroExtend32(m_cd_audio_volume_matrix[1][0]) * 100 / 0x80);
ImGui::Text("Right Output: Left Channel=%02X (%u%%), Right Channel=%02X (%u%%)", m_cd_audio_volume_matrix[0][1],
ZeroExtend32(m_cd_audio_volume_matrix[0][1]) * 100 / 0x80, m_cd_audio_volume_matrix[1][1],
ZeroExtend32(m_cd_audio_volume_matrix[1][1]) * 100 / 0x80);
}
ImGui::End();
}
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