mirror of
https://github.com/RetroDECK/Duckstation.git
synced 2024-11-27 16:15:41 +00:00
348 lines
9.8 KiB
C++
348 lines
9.8 KiB
C++
#pragma once
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#include "cdrom_async_reader.h"
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#include "common/bitfield.h"
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#include "common/cd_image.h"
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#include "common/cd_xa.h"
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#include "common/fifo_queue.h"
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#include "common/heap_array.h"
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#include "types.h"
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#include <array>
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#include <string>
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#include <tuple>
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#include <vector>
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class StateWrapper;
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class TimingEvent;
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class CDROM final
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{
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public:
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CDROM();
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~CDROM();
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void Initialize();
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void Shutdown();
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void Reset();
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bool DoState(StateWrapper& sw);
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bool HasMedia() const { return m_reader.HasMedia(); }
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const std::string& GetMediaFileName() const { return m_reader.GetMediaFileName(); }
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void InsertMedia(std::unique_ptr<CDImage> media);
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std::unique_ptr<CDImage> RemoveMedia(bool force = false);
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void CPUClockChanged();
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// I/O
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u8 ReadRegister(u32 offset);
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void WriteRegister(u32 offset, u8 value);
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void DMARead(u32* words, u32 word_count);
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// Render statistics debug window.
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void DrawDebugWindow();
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void SetUseReadThread(bool enabled);
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/// Reads a frame from the audio FIFO, used by the SPU.
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ALWAYS_INLINE std::tuple<s16, s16> GetAudioFrame()
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{
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const u32 frame = m_audio_fifo.IsEmpty() ? 0u : m_audio_fifo.Pop();
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return std::tuple<s16, s16>(static_cast<s16>(frame), static_cast<s16>(frame >> 16));
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}
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private:
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enum : u32
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{
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RAW_SECTOR_OUTPUT_SIZE = CDImage::RAW_SECTOR_SIZE - CDImage::SECTOR_SYNC_SIZE,
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DATA_SECTOR_OUTPUT_SIZE = CDImage::DATA_SECTOR_SIZE,
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SECTOR_SYNC_SIZE = CDImage::SECTOR_SYNC_SIZE,
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SECTOR_HEADER_SIZE = CDImage::SECTOR_HEADER_SIZE,
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XA_RESAMPLE_RING_BUFFER_SIZE = 32,
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XA_RESAMPLE_ZIGZAG_TABLE_SIZE = 29,
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XA_RESAMPLE_NUM_ZIGZAG_TABLES = 7,
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PARAM_FIFO_SIZE = 16,
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RESPONSE_FIFO_SIZE = 16,
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DATA_FIFO_SIZE = RAW_SECTOR_OUTPUT_SIZE,
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NUM_SECTOR_BUFFERS = 8,
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AUDIO_FIFO_SIZE = 44100 * 2,
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AUDIO_FIFO_LOW_WATERMARK = 5,
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BASE_RESET_TICKS = 400000,
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};
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static constexpr u8 INTERRUPT_REGISTER_MASK = 0x1F;
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enum class Interrupt : u8
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{
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DataReady = 0x01,
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Complete = 0x02,
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ACK = 0x03,
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DataEnd = 0x04,
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Error = 0x05
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};
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enum class Command : u16
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{
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Sync = 0x00,
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Getstat = 0x01,
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Setloc = 0x02,
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Play = 0x03,
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Forward = 0x04,
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Backward = 0x05,
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ReadN = 0x06,
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MotorOn = 0x07,
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Stop = 0x08,
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Pause = 0x09,
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Reset = 0x0A,
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Mute = 0x0B,
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Demute = 0x0C,
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Setfilter = 0x0D,
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Setmode = 0x0E,
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Getparam = 0x0F,
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GetlocL = 0x10,
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GetlocP = 0x11,
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SetSession = 0x12,
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GetTN = 0x13,
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GetTD = 0x14,
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SeekL = 0x15,
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SeekP = 0x16,
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SetClock = 0x17,
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GetClock = 0x18,
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Test = 0x19,
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GetID = 0x1A,
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ReadS = 0x1B,
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Init = 0x1C,
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GetQ = 0x1D,
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ReadTOC = 0x1E,
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VideoCD = 0x1F,
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None = 0xFFFF
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};
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enum class DriveState : u8
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{
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Idle,
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ShellOpening,
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Resetting,
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SeekingPhysical,
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SeekingLogical,
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ReadingID,
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ReadingTOC,
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Reading,
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Playing,
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Pausing,
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Stopping,
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ChangingSession
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};
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union StatusRegister
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{
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u8 bits;
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BitField<u8, u8, 0, 2> index;
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BitField<u8, bool, 2, 1> ADPBUSY;
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BitField<u8, bool, 3, 1> PRMEMPTY;
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BitField<u8, bool, 4, 1> PRMWRDY;
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BitField<u8, bool, 5, 1> RSLRRDY;
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BitField<u8, bool, 6, 1> DRQSTS;
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BitField<u8, bool, 7, 1> BUSYSTS;
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};
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enum StatBits : u8
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{
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STAT_ERROR = (1 << 0),
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STAT_MOTOR_ON = (1 << 1),
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STAT_SEEK_ERROR = (1 << 2),
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STAT_ID_ERROR = (1 << 3),
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STAT_SHELL_OPEN = (1 << 4),
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STAT_READING = (1 << 5),
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STAT_SEEKING = (1 << 6),
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STAT_PLAYING_CDDA = (1 << 7)
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};
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enum ErrorReason : u8
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{
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ERROR_REASON_INVALID_ARGUMENT = 0x10,
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ERROR_REASON_INCORRECT_NUMBER_OF_PARAMETERS = 0x20,
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ERROR_REASON_INVALID_COMMAND = 0x40,
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ERROR_REASON_NOT_READY = 0x80
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};
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union SecondaryStatusRegister
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{
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u8 bits;
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BitField<u8, bool, 0, 1> error;
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BitField<u8, bool, 1, 1> motor_on;
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BitField<u8, bool, 2, 1> seek_error;
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BitField<u8, bool, 3, 1> id_error;
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BitField<u8, bool, 4, 1> shell_open;
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BitField<u8, bool, 5, 1> reading;
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BitField<u8, bool, 6, 1> seeking;
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BitField<u8, bool, 7, 1> playing_cdda;
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/// Clears the CDDA/seeking bits.
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ALWAYS_INLINE void ClearActiveBits() { bits &= ~(STAT_SEEKING | STAT_READING | STAT_PLAYING_CDDA); }
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};
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union ModeRegister
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{
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u8 bits;
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BitField<u8, bool, 0, 1> cdda;
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BitField<u8, bool, 1, 1> auto_pause;
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BitField<u8, bool, 2, 1> report_audio;
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BitField<u8, bool, 3, 1> xa_filter;
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BitField<u8, bool, 4, 1> ignore_bit;
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BitField<u8, bool, 5, 1> read_raw_sector;
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BitField<u8, bool, 6, 1> xa_enable;
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BitField<u8, bool, 7, 1> double_speed;
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};
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union RequestRegister
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{
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u8 bits;
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BitField<u8, bool, 5, 1> SMEN;
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BitField<u8, bool, 6, 1> BFWR;
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BitField<u8, bool, 7, 1> BFRD;
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};
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void SoftReset();
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ALWAYS_INLINE bool IsDriveIdle() const { return m_drive_state == DriveState::Idle; }
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ALWAYS_INLINE bool IsSeeking() const
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{
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return (m_drive_state == DriveState::SeekingLogical || m_drive_state == DriveState::SeekingPhysical ||
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m_drive_state == DriveState::Resetting);
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}
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ALWAYS_INLINE bool IsReadingOrPlaying() const
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{
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return (m_drive_state == DriveState::Reading || m_drive_state == DriveState::Playing);
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}
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ALWAYS_INLINE bool CanReadMedia() const { return (m_drive_state != DriveState::ShellOpening && m_reader.HasMedia()); }
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ALWAYS_INLINE bool HasPendingCommand() const { return m_command != Command::None; }
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ALWAYS_INLINE bool HasPendingInterrupt() const { return m_interrupt_flag_register != 0; }
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ALWAYS_INLINE bool HasPendingAsyncInterrupt() const { return m_pending_async_interrupt != 0; }
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ALWAYS_INLINE void AddCDAudioFrame(s16 left, s16 right)
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{
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m_audio_fifo.Push(ZeroExtend32(static_cast<u16>(left)) | (ZeroExtend32(static_cast<u16>(right)) << 16));
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}
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void SetInterrupt(Interrupt interrupt);
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void SetAsyncInterrupt(Interrupt interrupt);
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void ClearAsyncInterrupt();
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void DeliverAsyncInterrupt();
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void SendACKAndStat();
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void SendErrorResponse(u8 stat_bits = STAT_ERROR, u8 reason = 0x80);
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void SendAsyncErrorResponse(u8 stat_bits = STAT_ERROR, u8 reason = 0x80);
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void UpdateStatusRegister();
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void UpdateInterruptRequest();
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TickCount GetAckDelayForCommand(Command command);
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TickCount GetTicksForRead();
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TickCount GetTicksForSeek(CDImage::LBA new_lba);
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TickCount GetTicksForStop(bool motor_was_on);
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CDImage::LBA GetNextSectorToBeRead();
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void BeginCommand(Command command); // also update status register
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void EndCommand(); // also updates status register
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void AbortCommand();
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void ExecuteCommand();
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void ExecuteTestCommand(u8 subcommand);
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void UpdateCommandEvent();
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void ExecuteDrive(TickCount ticks_late);
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void BeginReading(TickCount ticks_late = 0, bool after_seek = false);
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void BeginPlaying(u8 track_bcd, TickCount ticks_late = 0, bool after_seek = false);
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void DoShellOpenComplete(TickCount ticks_late);
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void DoResetComplete(TickCount ticks_late);
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void DoSeekComplete(TickCount ticks_late);
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void DoPauseComplete();
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void DoStopComplete();
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void DoChangeSessionComplete();
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void DoIDRead();
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void DoTOCRead();
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void DoSectorRead();
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void ProcessDataSectorHeader(const u8* raw_sector);
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void ProcessDataSector(const u8* raw_sector, const CDImage::SubChannelQ& subq);
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void ProcessXAADPCMSector(const u8* raw_sector, const CDImage::SubChannelQ& subq);
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void ProcessCDDASector(const u8* raw_sector, const CDImage::SubChannelQ& subq);
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void StopReadingWithDataEnd();
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void BeginSeeking(bool logical, bool read_after_seek, bool play_after_seek);
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void UpdatePositionWhileSeeking();
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void ResetCurrentXAFile();
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void ResetAudioDecoder();
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void LoadDataFIFO();
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void ClearSectorBuffers();
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template<bool STEREO, bool SAMPLE_RATE>
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void ResampleXAADPCM(const s16* frames_in, u32 num_frames_in);
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std::unique_ptr<TimingEvent> m_command_event;
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std::unique_ptr<TimingEvent> m_drive_event;
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Command m_command = Command::None;
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DriveState m_drive_state = DriveState::Idle;
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DiscRegion m_disc_region = DiscRegion::Other;
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StatusRegister m_status = {};
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SecondaryStatusRegister m_secondary_status = {};
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ModeRegister m_mode = {};
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bool m_current_double_speed = false;
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u8 m_interrupt_enable_register = INTERRUPT_REGISTER_MASK;
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u8 m_interrupt_flag_register = 0;
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u8 m_pending_async_interrupt = 0;
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CDImage::Position m_setloc_position = {};
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CDImage::LBA m_current_lba{};
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CDImage::LBA m_seek_start_lba{};
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CDImage::LBA m_seek_end_lba{};
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bool m_setloc_pending = false;
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bool m_read_after_seek = false;
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bool m_play_after_seek = false;
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bool m_muted = false;
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bool m_adpcm_muted = false;
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u8 m_xa_filter_file_number = 0;
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u8 m_xa_filter_channel_number = 0;
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u8 m_xa_current_file_number = 0;
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u8 m_xa_current_channel_number = 0;
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u8 m_xa_current_set = false;
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CDImage::SectorHeader m_last_sector_header{};
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CDXA::XASubHeader m_last_sector_subheader{};
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bool m_last_sector_header_valid = false;
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CDImage::SubChannelQ m_last_subq{};
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u8 m_last_cdda_report_frame_nibble = 0xFF;
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u8 m_play_track_number_bcd = 0xFF;
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u8 m_async_command_parameter = 0x00;
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std::array<std::array<u8, 2>, 2> m_cd_audio_volume_matrix{};
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std::array<std::array<u8, 2>, 2> m_next_cd_audio_volume_matrix{};
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std::array<s32, 4> m_xa_last_samples{};
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std::array<std::array<s16, XA_RESAMPLE_RING_BUFFER_SIZE>, 2> m_xa_resample_ring_buffer{};
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u8 m_xa_resample_p = 0;
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u8 m_xa_resample_sixstep = 6;
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InlineFIFOQueue<u8, PARAM_FIFO_SIZE> m_param_fifo;
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InlineFIFOQueue<u8, RESPONSE_FIFO_SIZE> m_response_fifo;
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InlineFIFOQueue<u8, RESPONSE_FIFO_SIZE> m_async_response_fifo;
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HeapFIFOQueue<u8, DATA_FIFO_SIZE> m_data_fifo;
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struct SectorBuffer
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{
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HeapArray<u8, RAW_SECTOR_OUTPUT_SIZE> data;
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u32 size;
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};
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u32 m_current_read_sector_buffer = 0;
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u32 m_current_write_sector_buffer = 0;
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std::array<SectorBuffer, NUM_SECTOR_BUFFERS> m_sector_buffers;
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CDROMAsyncReader m_reader;
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// two 16-bit samples packed in 32-bits
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HeapFIFOQueue<u32, AUDIO_FIFO_SIZE> m_audio_fifo;
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};
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extern CDROM g_cdrom;
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