ldecod.c

包含了从MPEG4的视频解码到H.264的视频编码部分的源代码

    currSlice->mot_ctx = create_contexts_MotionInfo();
    currSlice->tex_ctx = create_contexts_TextureInfo();
  }
  currSlice->max_part_nr = 3;  //! assume data partitioning (worst case) for the following mallocs()
  currSlice->partArr = AllocPartition(currSlice->max_part_nr);
}


/*!
 ************************************************************************
 * \brief
 *    Memory frees of the Slice structure and of its dependent
 *    data structures
 *
 * \par Input:
 *    Input Parameters struct inp_par *inp,  struct img_par *img
 ************************************************************************
 */
void free_slice(struct inp_par *inp, struct img_par *img)
{
  Slice *currSlice = img->currentSlice;

  FreePartition (currSlice->partArr, 3);
//      if (inp->symbol_mode == CABAC)
  if (1)
  {
    // delete all context models
    delete_contexts_MotionInfo(currSlice->mot_ctx);
    delete_contexts_TextureInfo(currSlice->tex_ctx);
  }
  free(img->currentSlice);

  currSlice = NULL;
}

/*!
 ************************************************************************
 * \brief
 *    Dynamic memory allocation of frame size related global buffers
 *    buffers are defined in global.h, allocated memory must be freed in
 *    void free_global_buffers()
 *
 *  \par Input:
 *    Input Parameters struct inp_par *inp, Image Parameters struct img_par *img
 *
 *  \par Output:
 *     Number of allocated bytes
 ***********************************************************************
 */
int init_global_buffers(struct inp_par *inp, struct img_par *img)
{
  int i,j;

  int memory_size=0;
#ifdef _ADAPT_LAST_GROUP_
  extern int *last_P_no_frm;
  extern int *last_P_no_fld;
#endif

  img->buf_cycle = inp->buf_cycle+1;

  img->buf_cycle *= 2;

  if (img->structure != FRAME)
  {
    img->height *= 2;         // set height to frame (twice of field) for normal variables
    img->height_cr *= 2;      // set height to frame (twice of field) for normal variables
  }

#ifdef _ADAPT_LAST_GROUP_
  if ((last_P_no_frm = (int*)malloc(2*img->buf_cycle*sizeof(int))) == NULL)
    no_mem_exit("get_mem4global_buffers: last_P_no_frm");
  if ((last_P_no_fld = (int*)malloc(2*img->buf_cycle*sizeof(int))) == NULL)
    no_mem_exit("get_mem4global_buffers: last_P_no_fld");
#endif

  // allocate memory for encoding frame buffers: imgY, imgUV
  // byte imgY[288][352];
  // byte imgUV[2][144][176];
  memory_size += get_mem2D(&imgY_frm, img->height, img->width);    // processing memory in frame mode
  memory_size += get_mem3D(&imgUV_frm, 2, img->height_cr, img->width_cr); // processing memory in frame mode

  memory_size += get_mem2D(&imgY_top, img->height/2, img->width);    // processing memory in field mode
  memory_size += get_mem3D(&imgUV_top, 2, img->height_cr/2, img->width_cr);  // processing memory in field mode

  memory_size += get_mem2D(&imgY_bot, img->height/2, img->width);    // processing memory in field mode
  memory_size += get_mem3D(&imgUV_bot, 2, img->height_cr/2, img->width_cr);  // processing memory in field mode

  // allocate memory for multiple ref. frame buffers: mref, mcref
  // rows and cols for croma component mcef[ref][croma][4x][4y] are switched
  // compared to luma mref[ref][4y][4x] for whatever reason
  // number of reference frames increased by one for next P-frame
  alloc_mref(img);
  
  // allocate memory for imgY_prev
  memory_size += get_mem2D(&imgY_prev, img->height, img->width);
  memory_size += get_mem3D(&imgUV_prev, 2, img->height_cr, img->width_cr);

  // allocate memory for reference frames of each block: refFrArr
  // int  refFrArr[72][88];
  memory_size += get_mem2Dint(&refFrArr_frm, img->height/BLOCK_SIZE, img->width/BLOCK_SIZE);
  memory_size += get_mem2Dint(&refFrArr_top, img->height/BLOCK_SIZE, img->width/BLOCK_SIZE);
  memory_size += get_mem2Dint(&refFrArr_bot, img->height/BLOCK_SIZE, img->width/BLOCK_SIZE);
  
  // allocate memory for collocated motion stationarity - int could be replaced with boolean    
  memory_size += get_mem2Dint(&moving_block_frm, img->height/BLOCK_SIZE, img->width/BLOCK_SIZE);
  memory_size += get_mem2Dint(&moving_block_top,  img->height/BLOCK_SIZE, img->width/BLOCK_SIZE);
  memory_size += get_mem2Dint(&moving_block_bot,  img->height/BLOCK_SIZE, img->width/BLOCK_SIZE);

  // allocate memory for reference frame in find_snr
  // byte imgY_ref[288][352];
  // byte imgUV_ref[2][144][176];
  memory_size += get_mem2D(&imgY_ref, img->height, img->width);
  memory_size += get_mem3D(&imgUV_ref, 2, img->height_cr, img->width_cr);

  // allocate memory in structure img
  if(((img->mb_data) = (Macroblock *) calloc((img->width/MB_BLOCK_SIZE) * (img->height/MB_BLOCK_SIZE),sizeof(Macroblock))) == NULL)
    no_mem_exit("init_global_buffers: img->mb_data");
//  if(img->UseConstrainedIntraPred)
  if (1)      // Always alloc the memory -- we don't know what the parset will tell us later
  {
    if(((img->intra_block) = (int**)calloc((j=(img->width/MB_BLOCK_SIZE) * (img->height/MB_BLOCK_SIZE)),sizeof(int))) == NULL)
      no_mem_exit("init_global_buffers: img->intra_block");
    for (i=0; i<j; i++)
    {
      if ((img->intra_block[i] = (int*)calloc(4, sizeof(int))) == NULL)
        no_mem_exit ("init_global_buffers: img->intra_block");
    }
  }
  // img => int mv[92][72][3]
  memory_size += get_mem3Dint(&(img->mv_frm),img->width/BLOCK_SIZE +4, img->height/BLOCK_SIZE,3);
  memory_size += get_mem3Dint(&(img->mv_top),img->width/BLOCK_SIZE +4, img->height/BLOCK_SIZE,3);
  memory_size += get_mem3Dint(&(img->mv_bot),img->width/BLOCK_SIZE +4, img->height/BLOCK_SIZE,3);
  // img => int ipredmode[90][74]
  memory_size += get_mem2Dint(&(img->ipredmode),img->width/BLOCK_SIZE +2 , img->height/BLOCK_SIZE +2);
  // int dfMV[92][72][3];
  memory_size += get_mem3Dint(&(img->dfMV),img->width/BLOCK_SIZE +4, img->height/BLOCK_SIZE,3);
  // int dbMV[92][72][3];
  memory_size += get_mem3Dint(&(img->dbMV),img->width/BLOCK_SIZE +4, img->height/BLOCK_SIZE,3);
  // int fw_refFrArr[72][88];
  memory_size += get_mem2Dint(&(img->fw_refFrArr_frm),img->height/BLOCK_SIZE,img->width/BLOCK_SIZE);
  // int bw_refFrArr[72][88];
  memory_size += get_mem2Dint(&(img->bw_refFrArr_frm),img->height/BLOCK_SIZE,img->width/BLOCK_SIZE);
  // int fw_mv[92][72][3];
  memory_size += get_mem3Dint(&(img->fw_mv),img->width/BLOCK_SIZE +4, img->height/BLOCK_SIZE,3);
  // int bw_mv[92][72][3];
  memory_size += get_mem3Dint(&(img->bw_mv),img->width/BLOCK_SIZE +4, img->height/BLOCK_SIZE,3);

  // int fw_refFrArr[72][88];
  memory_size += get_mem2Dint(&(img->fw_refFrArr_top),img->height/BLOCK_SIZE,img->width/BLOCK_SIZE);
  // int bw_refFrArr[72][88];
  memory_size += get_mem2Dint(&(img->bw_refFrArr_top),img->height/BLOCK_SIZE,img->width/BLOCK_SIZE);
  // int fw_refFrArr[72][88];
  memory_size += get_mem2Dint(&(img->fw_refFrArr_bot),img->height/BLOCK_SIZE,img->width/BLOCK_SIZE);
  // int bw_refFrArr[72][88];
  memory_size += get_mem2Dint(&(img->bw_refFrArr_bot),img->height/BLOCK_SIZE,img->width/BLOCK_SIZE);

  memory_size += get_mem2Dint(&(img->ipredmode_frm),img->width/BLOCK_SIZE +2 , img->height/BLOCK_SIZE +2);
  memory_size += get_mem2Dint(&(img->ipredmode_top),img->width/BLOCK_SIZE +2 , (img->height /2)/BLOCK_SIZE +2);
  memory_size += get_mem2Dint(&(img->ipredmode_bot),img->width/BLOCK_SIZE +2 , (img->height /2)/BLOCK_SIZE +2);

  memory_size += get_mem3Dint(&(img->fw_mv_frm),img->width/BLOCK_SIZE +4, img->height/BLOCK_SIZE,3);
  memory_size += get_mem3Dint(&(img->fw_mv_top),img->width/BLOCK_SIZE +4, (img->height/2)/BLOCK_SIZE,3);
  memory_size += get_mem3Dint(&(img->fw_mv_bot),img->width/BLOCK_SIZE +4, (img->height/2)/BLOCK_SIZE,3);

  memory_size += get_mem3Dint(&(img->bw_mv_frm),img->width/BLOCK_SIZE +4, img->height/BLOCK_SIZE,3);
  memory_size += get_mem3Dint(&(img->bw_mv_top),img->width/BLOCK_SIZE +4, (img->height/2)/BLOCK_SIZE,3);
  memory_size += get_mem3Dint(&(img->bw_mv_bot),img->width/BLOCK_SIZE +4, (img->height/2)/BLOCK_SIZE,3);

  memory_size += get_mem3Dint(&(img->dfMV_top),img->width/BLOCK_SIZE +4, img->height/BLOCK_SIZE,3);
  memory_size += get_mem3Dint(&(img->dbMV_top),img->width/BLOCK_SIZE +4, img->height/BLOCK_SIZE,3);

  memory_size += get_mem3Dint(&(img->dfMV_bot),img->width/BLOCK_SIZE +4, img->height/BLOCK_SIZE,3);
  memory_size += get_mem3Dint(&(img->dbMV_bot),img->width/BLOCK_SIZE +4, img->height/BLOCK_SIZE,3);

  memory_size += get_mem2Dint(&(img->field_anchor),img->height/BLOCK_SIZE,img->width/BLOCK_SIZE);
  memory_size += get_mem2Dint(&(field_mb), img->height/MB_BLOCK_SIZE, img->width/MB_BLOCK_SIZE);

  memory_size += get_mem3Dint(&(img->wp_weight), 2, MAX_REFERENCE_PICTURES, 3);
  memory_size += get_mem3Dint(&(img->wp_offset), 2, MAX_REFERENCE_PICTURES, 3);
  memory_size += get_mem4Dint(&(img->wbp_weight), 2, MAX_REFERENCE_PICTURES, MAX_REFERENCE_PICTURES, 3);

  // CAVLC mem
  if((img->nz_coeff = (int****)calloc(img->width/MB_BLOCK_SIZE,sizeof(int***))) == NULL)
    no_mem_exit("get_mem4global_buffers: nzcoeff");
  for(j=0;j<img->width/MB_BLOCK_SIZE;j++)
  {
    memory_size += get_mem3Dint(&(img->nz_coeff[j]), img->height/MB_BLOCK_SIZE, 4, 6);
  }

  memory_size += get_mem2Dint(&(img->siblock),img->width/MB_BLOCK_SIZE  , img->height/MB_BLOCK_SIZE);

  if (img->structure != FRAME)
  {
    img->height /= 2;      // reset height for normal variables
    img->height_cr /= 2;   // reset height for normal variables
  }
  
  img->buf_cycle = inp->buf_cycle+1;

  return (memory_size);
}

/*!
 ************************************************************************
 * \brief
 *    Free allocated memory of frame size related global buffers
 *    buffers are defined in global.h, allocated memory is allocated in
 *    int init_global_buffers()
 *
 * \par Input:
 *    Input Parameters struct inp_par *inp, Image Parameters struct img_par *img
 *
 * \par Output:
 *    none
 *
 ************************************************************************
 */
void free_global_buffers(struct inp_par *inp, struct img_par *img)
{
  int  i,j;
#ifdef _ADAPT_LAST_GROUP_
  extern int *last_P_no_frm;
  extern int *last_P_no_fld;
  free (last_P_no_frm);
  free (last_P_no_fld);
#endif

  free_mem2D(imgY_frm);
  free_mem2D(imgY_top);
  free_mem2D(imgY_bot);
  free_mem3D(imgUV_frm,2);
  free_mem3D(imgUV_top,2);
  free_mem3D(imgUV_bot,2);
  free_mem2D(imgY_prev);
  free_mem3D(imgUV_prev,2);

  // free multiple ref frame buffers
  free (mref_frm);
  free (mcef_frm);

  free (mref_fld);
  free (mcef_fld);
  free (parity_fld);
  free (chroma_vector_adjustment);

  free_mem2Dint(refFrArr_frm);
  free_mem2Dint(refFrArr_top);
  free_mem2Dint(refFrArr_bot);

  free_mem2Dint(moving_block_frm);
  free_mem2Dint(moving_block_top);
  free_mem2Dint(moving_block_bot);

  free_mem2D (imgY_ref);
  free_mem3D (imgUV_ref,2);
//  free_mem2D (imgY_tmp);
//  free_mem3D (imgUV_tmp,2);

  // CAVLC free mem
  for(j=0;j<img->width/MB_BLOCK_SIZE;j++)
  {
    free_mem3Dint(img->nz_coeff[j], img->height/MB_BLOCK_SIZE);
  }
  if (img->nz_coeff !=NULL) free(img->nz_coeff );
  free_mem2Dint(img->siblock);

  // free mem, allocated for structure img
  if (img->mb_data       != NULL) free(img->mb_data);

//  if(img->UseConstrainedIntraPred)
  if (1)    // uncnonditionally allocated since introdiuction of par sets
  {
    j = (img->width/16)*(img->height/16);
    for (i=0; i<j; i++)
    {
      free (img->intra_block[i]);
    }
    free (img->intra_block);
  }
  free_mem3Dint(img->mv_frm,img->width/BLOCK_SIZE + 4);
  free_mem3Dint(img->mv_top,img->width/BLOCK_SIZE + 4);
  free_mem3Dint(img->mv_bot,img->width/BLOCK_SIZE + 4);

  free_mem2Dint (img->ipredmode);

  free_mem3Dint(img->dfMV,img->width/BLOCK_SIZE + 4);
  free_mem3Dint(img->dbMV,img->width/BLOCK_SIZE + 4);

  free_mem2Dint(img->fw_refFrArr_frm);
  free_mem2Dint(img->bw_refFrArr_frm);
  free_mem2Dint(img->fw_refFrArr_top);
  free_mem2Dint(img->bw_refFrArr_top);
  free_mem2Dint(img->fw_refFrArr_bot);
  free_mem2Dint(img->bw_refFrArr_bot);

  free_mem3Dint(img->fw_mv,img->width/BLOCK_SIZE + 4);
  free_mem3Dint(img->bw_mv,img->width/BLOCK_SIZE + 4);

  free_mem2Dint (img->ipredmode_frm);
  free_mem2Dint (img->ipredmode_top);
  free_mem2Dint (img->ipredmode_bot);

  free_mem3Dint(img->fw_mv_frm,img->width/BLOCK_SIZE + 4);
  free_mem3Dint(img->fw_mv_top,img->width/BLOCK_SIZE + 4);
  free_mem3Dint(img->fw_mv_bot,img->width/BLOCK_SIZE + 4);

  free_mem3Dint(img->bw_mv_frm,img->width/BLOCK_SIZE + 4);
  free_mem3Dint(img->bw_mv_top,img->width/BLOCK_SIZE + 4);
  free_mem3Dint(img->bw_mv_bot,img->width/BLOCK_SIZE + 4);

  free_mem3Dint(img->dfMV_top,img->width/BLOCK_SIZE + 4);
  free_mem3Dint(img->dbMV_top,img->width/BLOCK_SIZE + 4);

  free_mem3Dint(img->dfMV_bot,img->width/BLOCK_SIZE + 4);
  free_mem3Dint(img->dbMV_bot,img->width/BLOCK_SIZE + 4);

  free_mem2Dint(img->field_anchor);
  free_mem2Dint(field_mb);

  free_mem3Dint(img->wp_weight, 2);
  free_mem3Dint(img->wp_offset, 2);
  free_mem4Dint(img->wbp_weight, 2, MAX_REFERENCE_PICTURES);

}