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/** \file     DecLibRecon.h

    \brief    decoder class (header)

*/

#pragma once

#include "CommonLib/CommonDef.h"

#include "CommonLib/AdaptiveLoopFilter.h"

#include "CommonLib/LoopFilter.h"

#include "CommonLib/InterPrediction.h"

#include "CommonLib/IntraPrediction.h"

#include "CommonLib/Picture.h"

#include "CommonLib/RdCost.h"

#include "CommonLib/Reshape.h"

#include "CommonLib/SampleAdaptiveOffset.h"

#include "CommonLib/TrQuant.h"

#include "DecCu.h"

#include "Utilities/ThreadPool.h"

namespace vvdec

{

class DecLibRecon;

class InterPrediction;

class TrQuant;

//! \ingroup DecoderLib

//! \{

// ====================================================================================================================

// Class definition

// ====================================================================================================================

enum TaskType

{

  /*TRAFO=-1,*/ MIDER, MIDER_cont, LF_INIT, INTER, INTRA, INTRA_cont, RSP, LF_V, LF_V_cont, LF_H, PRESAO, SAO, SAO_cont, ALF, DONE, DMVR

};

using CtuState = std::atomic<TaskType>;

struct CommonTaskParam

{

  DecLibRecon&             decLib;

  CodingStructure*         cs           = nullptr;

  std::vector<CtuState>    ctuStates;

  std::vector<MotionHist>  perLineMiHist;

  bool                     doALF        = true;

  explicit CommonTaskParam( DecLibRecon* dec ) : decLib( *dec ) {}

  void reset( CodingStructure& cs, TaskType ctuStartState, int tasksPerLine, bool doALF );

};

struct SubPicExtTask

{

  Picture*    picture   = nullptr;

  PelStorage* subPicBuf = nullptr;

  Area        subPicArea;

};

struct LineTaskParam

{

  CommonTaskParam& common;

  int              line;

};

struct CtuTaskParam

{

  CommonTaskParam& common;

  int              taskLine;

  int              taskCol;

  int              ctuStart;

  int              ctuEnd;

  int              numColPerTask;

  int              numTasksPerLine;

};

struct FinishPicTaskParam

{

  DecLibRecon* decLib;

  Picture*     pic;

  FinishPicTaskParam() : decLib( nullptr ), pic( nullptr ) {}

  FinishPicTaskParam( DecLibRecon* _dec, Picture* _pic ) : decLib( _dec ), pic( _pic ) {}

};

struct PerThreadResource

{

  IntraPrediction m_cIntraPred;

  InterPrediction m_cInterPred;

  TrQuant         m_cTrQuant;

  Reshape         m_cReshaper;

  DecCu           m_cCuDecoder;

  explicit PerThreadResource() : m_cTrQuant( &m_cInterPred ) {}

  explicit PerThreadResource( TrQuant& trQuant0 ) : m_cTrQuant( &m_cInterPred, &trQuant0 ) {}

};

/// decoder class

class DecLibRecon

{

private:

  PerThreadResource  **m_pcThreadResource;

  RdCost               m_cRdCost;

  LoopFilter           m_cLoopFilter;

  SampleAdaptiveOffset m_cSAO;

  AdaptiveLoopFilter   m_cALF;

  int                  m_numDecThreads = 0;

  ThreadPool*          m_decodeThreadPool;

  bool                 m_upscaleOutputEnabled = false;

  Picture*             m_currDecompPic = nullptr;

#if TRACE_ENABLE_ITT

  __itt_domain*        m_itt_decInst = nullptr;

#endif

  std::unique_ptr<Pel[], AlignedDeleter<Pel>> 

                       m_predBuf;

  ptrdiff_t            m_predBufSize     = 0;

  Mv*                  m_dmvrMvCache     = nullptr;

  size_t               m_dmvrMvCacheSize = 0;

  ptrdiff_t            m_num4x4Elements  = 0;

  LoopFilterParam*     m_loopFilterParam = nullptr;

  MotionInfo*          m_motionInfo      = nullptr;

  PelStorage           m_fltBuf;

  CommonTaskParam            commonTaskParam{ this };

  std::vector<SubPicExtTask> m_subPicExtTasks;

  std::vector<LineTaskParam> tasksFinishMotion;

  std::vector<CtuTaskParam>  tasksCtu;

  FinishPicTaskParam         taskFinishPic;

  CBarrierVec                picBarriers;

public:

  DecLibRecon();

  ~DecLibRecon() = default;

  CLASS_COPY_MOVE_DELETE( DecLibRecon )

  void create( ThreadPool* threadPool, unsigned instanceId, bool upscaleOutputEnabled );

  void destroy();

  void     decompressPicture( Picture* pcPic );

  Picture* waitForPrevDecompressedPic();

  void     cleanupOnException( std::exception_ptr exception );

  Picture* getCurrPic() const { return m_currDecompPic; }

  void     swapBufs( CodingStructure& cs );

private:

  void borderExtPic       ( Picture* pic, const Picture* currPic );

  void createSubPicRefBufs( Picture* pic, const Picture* currPic );

  template<bool checkReadyState=false>

  static bool ctuTask( int tid, CtuTaskParam* param );

};

}