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 /** \file     SubpicMergeApp.h
     \brief    Subpicture merge application header file
 */

#include <vector>
#include <fstream>


 //! \ingroup SubpicMergeApp
 //! \{



struct SubpicParams {
  int                                  width;
  int                                  height;
  int                                  topLeftCornerX;
  int                                  topLeftCornerY;
  std::ifstream                        fp;
};


struct Subpicture;
class InputByteStream;
class HLSyntaxReader;
class DCI;
class ParameterSetManager;
class PicHeader;
class InputNALUnit;
class Slice;
class OutputBitstream;
class VPS;
class SPS;
class PPS;
struct OutputNALUnit;
class AccessUnit;


class SubpicMergeApp
{
public:
  SubpicMergeApp(std::vector<SubpicParams> &subpicParams, std::ofstream &outputStream);
  ~SubpicMergeApp();

  void mergeStreams(bool mixedNaluFlag);
  void mergeYuvFiles(int bitdepth, int chromaFormat);

private:
  std::vector<Subpicture> *m_subpics;
  std::ofstream &m_outputStream;
  int m_prevPicPOC;
  int m_picWidth;
  int m_picHeight;

  void getOutputPicSize();
  bool isNewPicture(std::ifstream *bitstreamFile, InputByteStream *bytestream, bool firstSliceInPicture);
  bool parseDCI(HLSyntaxReader &hlsReader, DCI &dci);
  int parseVPS(HLSyntaxReader &hlsReader, ParameterSetManager &psManager);
  int parseSPS(HLSyntaxReader &hlsReader, ParameterSetManager &psManager);
  int parsePPS(HLSyntaxReader &hlsReader, ParameterSetManager &psManager);
  void parseAPS(HLSyntaxReader &hlsReader, ParameterSetManager &psManager, int &apsId, int &apsType);
  void parsePictureHeader(HLSyntaxReader &hlsReader, PicHeader &picHeader, ParameterSetManager &psManager);
  void parseSliceHeader(HLSyntaxReader &hlsReader, InputNALUnit &nalu, Slice &slice, PicHeader &picHeader, OutputBitstream &sliceData, ParameterSetManager &psManager, int prevTid0Poc);
  void decodeNalu(Subpicture &subpic, InputNALUnit &nalu);
  void parseSubpic(Subpicture &subpic, bool &morePictures);
  void generateMergedStreamVPSes(std::vector<VPS*> &vpsList);
  int computeSubPicIdLen(int numSubpics);
  void generateMergedStreamSPSes(std::vector<SPS*> &spsList);
  void getTileDimensions(std::vector<int> &tileWidths, std::vector<int> &tileHeights);
  void generateMergedStreamPPSes(ParameterSetManager &psManager, std::vector<PPS*> &ppsList);
  void updateSliceHeadersForMergedStream(ParameterSetManager &psManager);
  void copyInputNaluToOutputNalu(OutputNALUnit &outNalu, InputNALUnit &inNalu);
  void copyNalUnitsToAccessUnit(AccessUnit &accessUnit, std::vector<InputNALUnit> &nalus, int naluType);
  bool getMixedNalPicFlag();
  Subpicture &selectSubpicForPicHeader(bool isMixedNaluPic);
  void generateMergedPic(ParameterSetManager &psManager, bool mixedNaluFlag);
  void validateSubpics();
};


//! \}
