#ifndef __MDFN_PSX_CDC_H
#define __MDFN_PSX_CDC_H

#include "../cdrom/cdromif.h"
#include "../cdrom/SimpleFIFO.h"
#include "../clamp.h"

struct CD_Audio_Buffer
{
   int16 Samples[2][0x1000];	// [0][...] = l, [1][...] = r
   uint32 Size;
   uint32 Freq;
   uint32 ReadPos;
};

class PS_CDC
{
   public:

      PS_CDC();
      ~PS_CDC();

      void SetDisc(bool tray_open, CDIF *cdif, const char disc_id[4]);

      void Power(void);
      int StateAction(StateMem *sm, int load, int data_only);
      void ResetTS(void);

      int32 CalcNextEvent(void);	// Returns in master cycles to next event.

      int32_t Update(const int32_t timestamp);

      void Write(const int32_t timestamp, uint32 A, uint8 V);
      uint8 Read(const int32_t timestamp, uint32 A);

      bool DMACanRead(void);
      uint32 DMARead(void);
      void SoftReset(void);

      void GetCDAudio(int32 samples[2], const unsigned freq);

      CD_Audio_Buffer AudioBuffer;
#ifdef __LIBRETRO__
      int DriveStatus;
#endif

   private:
      CDIF *Cur_CDIF;
      bool DiscChanged;
      int32 DiscStartupDelay;

      uint8 Pending_DecodeVolume[2][2], DecodeVolume[2][2];		// [data_source][output_port]

      int16 ADPCM_ResampBuf[2][32 * 2];
      uint8 ADPCM_ResampCurPos;
      uint8 ADPCM_ResampCurPhase;

      void ApplyVolume(int32 samples[2]);
      void ReadAudioBuffer(int32 samples[2]);

      void ClearAudioBuffers(void);

      uint8 RegSelector;
      uint8 ArgsBuf[16];
      uint8 ArgsWP;		// 5-bit(0 ... 31)
      uint8 ArgsRP;		// 5-bit(0 ... 31)

      uint8 ArgsReceiveLatch;
      uint8 ArgsReceiveBuf[32];
      uint8 ArgsReceiveIn;

      uint8 ResultsBuffer[16];
      uint8 ResultsIn;	// 5-bit(0 ... 31)
      uint8 ResultsWP;	// Write position, 4 bit(0 ... 15).
      uint8 ResultsRP;	// Read position, 4 bit(0 ... 15).

      SimpleFIFO DMABuffer;
      uint8 SB[2340];
      uint32 SB_In;

      enum { SectorPipe_Count = 2 };
      uint8 SectorPipe[SectorPipe_Count][2352];
      uint8 SectorPipe_Pos;
      uint8 SectorPipe_In;

      uint8 SubQBuf[0xC];
      uint8 SubQBuf_Safe[0xC];
      bool SubQChecksumOK;

      bool HeaderBufValid;
      uint8 HeaderBuf[12];

      void RecalcIRQ(void);
      enum
      {
         CDCIRQ_NONE = 0,
         CDCIRQ_DATA_READY = 1,
         CDCIRQ_COMPLETE = 2,
         CDCIRQ_ACKNOWLEDGE = 3,
         CDCIRQ_DATA_END = 4,
         CDCIRQ_DISC_ERROR = 5
      };

      // Names are just guessed for these based on what conditions cause them:
      enum
      {
         ERRCODE_BAD_ARGVAL  = 0x10,
         ERRCODE_BAD_NUMARGS = 0x20,
         ERRCODE_BAD_COMMAND = 0x40,
         ERRCODE_NOT_READY   = 0x80	// 0x80 (happens with getlocl when drive isn't reading, pause when tray is open, and MAYBE when trying to run an async
            //	 command while another async command is currently in its asynch phase being executed[pause when in readtoc, todo test more])
      };

      uint8 IRQBuffer;
      uint8 IRQOutTestMask;
      int32 CDCReadyReceiveCounter;	// IRQBuffer being non-zero prevents new results and new IRQ from coming in and erasing the current results,
      // but apparently at least one CONFOUNDED game is clearing the IRQ state BEFORE reading the results, so we need to have a delay
      // between IRQBuffer being cleared to when we allow new results to come in.  (The real thing should be like this too,
      // but the mechanism is probably more nuanced and complex and ugly and I like anchovy pizza)

      void BeginResults(void);
      void WriteIRQ(uint8);
      void WriteResult(uint8);
      uint8 ReadResult(void);

      uint8 FilterFile;
      uint8 FilterChan;


      uint8 PendingCommand;
      int PendingCommandPhase;
      int32 PendingCommandCounter;

      int32 SPUCounter;

      enum { MODE_SPEED = 0x80 };
      enum { MODE_STRSND = 0x40 };
      enum { MODE_SIZE = 0x20 };
      enum { MODE_SIZE2 = 0x10 };
      enum { MODE_SF = 0x08 };
      enum { MODE_REPORT = 0x04 };
      enum { MODE_AUTOPAUSE = 0x02 };
      enum { MODE_CDDA = 0x01 };
      uint8 Mode;

      enum
      {
         DS_STANDBY = -2,
         DS_PAUSED = -1,
         DS_STOPPED = 0,
         DS_SEEKING,
         DS_SEEKING_LOGICAL,
         DS_PLAY_SEEKING,
         DS_PLAYING,
         DS_READING,
         DS_RESETTING
      };
#ifndef __LIBRETRO__
      int DriveStatus;
#endif
      int StatusAfterSeek;
      bool Forward;
      bool Backward;
      bool Muted;

      int32 PlayTrackMatch;

      int32 PSRCounter;

      int32 CurSector;
      uint32 SectorsRead;	// Reset to 0 on Read*/Play command start; used in the rough simulation of PS1 SetLoc->Read->Pause->Read behavior.

      unsigned AsyncIRQPending;
      uint8 AsyncResultsPending[16];
      uint8 AsyncResultsPendingCount;

      int32 CalcSeekTime(int32 initial, int32 target, bool motor_on, bool paused);

      void ClearAIP(void);
      void CheckAIP(void);
      void SetAIP(unsigned irq, unsigned result_count, uint8 *r);
      void SetAIP(unsigned irq, uint8 result0);
      void SetAIP(unsigned irq, uint8 result0, uint8 result1);

      int32 SeekTarget;
      uint32 SeekRetryCounter;

      int32_t lastts;

      TOC toc;
      bool IsPSXDisc;
      uint8 DiscID[4];

      int32 CommandLoc;
      bool CommandLoc_Dirty;

      uint8 MakeStatus(bool cmd_error = false);
      bool DecodeSubQ(uint8 *subpw);
      bool CommandCheckDiscPresent(void);
      void DMForceStop();

      void EnbufferizeCDDASector(const uint8 *buf);
      bool XA_Test(const uint8 *sdata);
      void XA_ProcessSector(const uint8 *sdata, CD_Audio_Buffer *ab);
      int16 xa_previous[2][2];
      bool xa_cur_set;
      uint8 xa_cur_file;
      uint8 xa_cur_chan;

      uint8 ReportLastF;

      void HandlePlayRead(void);

      struct CDC_CTEntry
      {
         uint8 args_min;
         uint8 args_max;
         const char *name;
         int32 (PS_CDC::*func)(const int arg_count, const uint8 *args);
         int32 (PS_CDC::*func2)(void);
      };

      void PreSeekHack(uint32_t target);
      void ReadBase(void);

      static CDC_CTEntry Commands[0x20];

      int32 Command_Nop(const int arg_count, const uint8 *args);
      int32 Command_Setloc(const int arg_count, const uint8 *args);
      int32 Command_Play(const int arg_count, const uint8 *args);
      int32 Command_Forward(const int arg_count, const uint8 *args);
      int32 Command_Backward(const int arg_count, const uint8 *args);
      int32 Command_ReadN(const int arg_count, const uint8 *args);
      int32 Command_Standby(const int arg_count, const uint8 *args);
      int32 Command_Standby_Part2(void);
      int32 Command_Stop(const int arg_count, const uint8 *args);
      int32 Command_Stop_Part2(void); 
      int32 Command_Pause(const int arg_count, const uint8 *args);
      int32 Command_Pause_Part2(void);
      int32 Command_Reset(const int arg_count, const uint8 *args);
      int32 Command_Mute(const int arg_count, const uint8 *args);
      int32 Command_Demute(const int arg_count, const uint8 *args);
      int32 Command_Setfilter(const int arg_count, const uint8 *args);
      int32 Command_Setmode(const int arg_count, const uint8 *args);
      int32 Command_Getparam(const int arg_count, const uint8 *args);
      int32 Command_GetlocL(const int arg_count, const uint8 *args);
      int32 Command_GetlocP(const int arg_count, const uint8 *args);

      int32 Command_ReadT(const int arg_count, const uint8 *args);
      int32 Command_ReadT_Part2(void);

      int32 Command_GetTN(const int arg_count, const uint8 *args);
      int32 Command_GetTD(const int arg_count, const uint8 *args);
      int32 Command_SeekL(const int arg_count, const uint8 *args);
      int32 Command_SeekP(const int arg_count, const uint8 *args);
      int32 Command_Seek_PartN(void);

      int32 Command_Test(const int arg_count, const uint8 *args);

      int32 Command_ID(const int arg_count, const uint8 *args);
      int32 Command_ID_Part2(void);

      int32 Command_ReadS(const int arg_count, const uint8 *args);
      int32 Command_Init(const int arg_count, const uint8 *args);

      int32 Command_ReadTOC(const int arg_count, const uint8 *args);
      int32 Command_ReadTOC_Part2(void);

      int32 Command_0x1d(const int arg_count, const uint8 *args);
};

#endif
