/*   File: LayerData      By: Alex Theo de Jong   Created: February 1996   Description:   Place holder class for all layer data */class LayerData {  friend class Mpeg2Video; protected:  VideoStream* input;     // bit input  DisplayX11* display;  Idct* idct;  Synchronization* sync;  // Synchronization object  // sequence header  int intra_quantizer_matrix[64], non_intra_quantizer_matrix[64];  int chroma_intra_quantizer_matrix[64], chroma_non_intra_quantizer_matrix[64];  int mpeg2;  int qscale_type,altscan;      // picture coding extension  int pri_brk;                  // slice/macroblock  int quant_scale;  short block[12][64];  int   sparse[12]; public:  int pict_scal;                // picture spatial scalable extension  int scalable_mode;            // sequence scalable extension protected:  // gethdr  void getseqhdr(void);  void getgophdr(void);  void getpicturehdr(void);  void ext_user_data(void);  void sequence_extension(void);  void sequence_display_extension(void);  void quant_matrix_extension(void);  void sequence_scalable_extension(void);  void picture_display_extension(void);  void picture_coding_extension(void);  void picture_spatial_scalable_extension(void);  void picture_temporal_scalable_extension(void);  /* decode extra bit information */  inline void ext_bit_info(void){ while (input->getbits(1)) input->flushbits(8); }  // getpic  void getMBs(int framenum);  void macroblock_modes(int *pmb_type, int *pstwtype, int *pstwclass,                                int *pmotion_type, int *pmv_count, int *pmv_format,                                int *pdmv, int *pmvscale, int *pdct_type);  void clearblock(int comp,int size);  void addblock(int comp, int bx, int by, int dct_type, int addflag); public:  LayerData(const char* windowtitle, Synchronization* s=0){     sync=s;     idct=new Idct;    input=0;    display=new DisplayX11(windowtitle, s);  }  ~LayerData(){     delete input;    delete idct;     delete display;   }  // gethdr  int getheader();  int getslicehdr(void);  // getpic  void getpicture(int framenum);  void putlast(); // getblk  void getintrablock(int comp, int dc_dct_pred[]);  void getinterblock(int comp);  void getmpg2intrablock(int comp, int dc_dct_pred[]);  void getmpg2interblock(int comp);  // motion  void motion_vectors(int PMV[2][2][2], int dmvector[2],                      int mv_field_sel[2][2], int s, int mv_count, int mv_format,                      int h_r_size, int v_r_size, int dmv, int mvscale);  void motion_vector(int *PMV, int *dmvector,                     int h_r_size, int v_r_size, int dmv, int mvscale, int full_pel_vector);  void calc_DMV(int DMV[][2], int *dmvector, int mvx, int mvy);  // recon  void reconstruct(int bx, int by, int mb_type, int motion_type,                   int PMV[2][2][2], int mv_field_sel[2][2], int dmvector[2], int stwtype);  };