text: #ifndef TRANSFORM 
  #define TRANSFORM
  
  void forward4x4(int *block, int *out_block, int pos_y, int pos_x);
  void inverse4x4(int *block, int *out_block, int pos_y, int pos_x);
  void hadamard4x4_DCs(int *block, int *out_block);
  void ihadamard4x4_DCs(int *block, int *reconstruction);
  //void inverse4x4(int **tblock, int **block, int pos_y, int pos_x);
  //void hadamard4x4(int **block, int **tblock);
  //void ihadamard4x4(int **tblock, int **block);
  //void hadamard4x2(int **block, int **tblock);
  //void ihadamard4x2(int **tblock, int **block);
  //void hadamard2x2(int **block, int tblock[4]);
  //void ihadamard2x2(int tblock[4], int block[4]);
  
  #endif
  