h.264

H.264编码解码器源码(c语言版本)

  if (input->WeightedPrediction || input->WeightedBiprediction)
    free(mref_frm_w);
 
  if (input->WeightedPrediction || input->WeightedBiprediction)
        free (Refbuf11_frm_w);

  // free multiple ref frame buffers
  // number of reference frames increased by one for next P-frame

  if(input->successive_Bframe!=0 || input->StoredBPictures > 0)
  {
    // free last P-frame buffers for B-frame coding
    free_mem3Dint(tmp_fwMV,2);
    free_mem3Dint(tmp_bwMV,2);
    free_mem3Dint(dfMV,2);
    free_mem3Dint(dbMV,2);
    free_mem2Dint(fw_refFrArr_frm);
    free_mem2Dint(bw_refFrArr_frm);    
    if (input->direct_type)
    {
      free_mem2Dint(moving_block_frm);
      free_mem2Dint(fwdir_refFrArr);
      free_mem2Dint(bwdir_refFrArr);
    }
  } // end if B frame
  free_mem2Dint(abp_type_FrArr);

  free_mem2Dint(img4Y_tmp);    // free temp quarter pel frame buffer

  // free mem, allocated in init_img()
  // free intra pred mode buffer for blocks
  free_mem2Dint(img->ipredmode);
  free(img->mb_data);

  if(input->UseConstrainedIntraPred)
  {
    free (img->intra_block);
  }

  if (input->rdopt==2)
  {
    free(decs->resY[0]);
    free(decs->resY);
    free(decs->RefBlock[0]);
    free(decs->RefBlock);
    for (j=0; j<input->NoOfDecoders; j++)
    {
      free(decs->decY[j][0]);
      free(decs->decY[j]);
      free(decs->decY_best[j][0]);
      free(decs->decY_best[j]);
      for (i=0; i<img->buf_cycle+1; i++)
      {
        free(decs->decref[j][i][0]);
        free(decs->decref[j][i]);
      }
      free(decs->decref[j]);
    }
    free(decs->decY);
    free(decs->decY_best);
    free(decs->decref);
    free(decs->status_map[0]);
    free(decs->status_map);
    free(decs->dec_mb_mode[0]);
    free(decs->dec_mb_mode);
  }
  if (input->RestrictRef)
  {
    free(pixel_map[0]);
    free(pixel_map);
    free(refresh_map[0]);
    free(refresh_map);
  }

  if(input->InterlaceCodingOption != FRAME_CODING)
  {
    free_mem2D(imgY_com);
    free_mem3D(imgUV_com,2);
    free_mem2D(imgY_org_top);      // free ref frame buffers
    free_mem3D(imgUV_org_top,2);
    free_mem2D(imgY_org_bot);      // free ref frame buffers
    free_mem3D(imgUV_org_bot,2);

    // free multiple ref frame buffers
    // number of reference frames increased by one for next P-frame
    if (input->WeightedPrediction || input->WeightedBiprediction)
      free(mref_fld_w);

    if(input->successive_Bframe!=0 || input->StoredBPictures > 0)
    {
      // free last P-frame buffers for B-frame coding
      free_mem2Dint(fw_refFrArr_top);
      free_mem2Dint(bw_refFrArr_top);
      free_mem2Dint(fw_refFrArr_bot);
      free_mem2Dint(bw_refFrArr_bot);
      if (input->direct_type)
      {
        free_mem2Dint(moving_block_top);
        free_mem2Dint(moving_block_bot);
      }
    } // end if B frame

    if ( input->WeightedPrediction || input->WeightedBiprediction)
       free (Refbuf11_fld_w);

    free_mem3Dint(tmp_mv_top,2);
    free_mem3Dint(tmp_mv_bot,2);
    free_mem2Dint(refFrArr_top);
    free_mem2Dint(refFrArr_bot);
    free_mem2Dint(abp_type_FrArr_top);
    free_mem2Dint(abp_type_FrArr_bot);
  }

  // CAVLC mem free
  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->field_anchor);
}

/*!
 ************************************************************************
 * \brief
 *    Allocate memory for mv
 * \par Input:
 *    Image Parameters struct img_par *img                             \n
 *    int****** mv
 * \return memory size in bytes
 ************************************************************************
 */
int get_mem_mv (int****** mv)
{
  int i, j, k, l;

  if ((*mv = (int*****)calloc(4,sizeof(int****))) == NULL)
    no_mem_exit ("get_mem_mv: mv");
  for (i=0; i<4; i++)
  {
    if (((*mv)[i] = (int****)calloc(4,sizeof(int***))) == NULL)
      no_mem_exit ("get_mem_mv: mv");
    for (j=0; j<4; j++)
    {
      if (((*mv)[i][j] = (int***)calloc(img->buf_cycle,sizeof(int**))) == NULL)
        no_mem_exit ("get_mem_mv: mv");
      for (k=0; k<img->buf_cycle; k++)
      {
        if (((*mv)[i][j][k] = (int**)calloc(9,sizeof(int*))) == NULL)
          no_mem_exit ("get_mem_mv: mv");
        for (l=0; l<9; l++)
          if (((*mv)[i][j][k][l] = (int*)calloc(2,sizeof(int))) == NULL)
            no_mem_exit ("get_mem_mv: mv");
      }
    }
  }
  return 4*4*img->buf_cycle*9*2*sizeof(int);
}


/*!
 ************************************************************************
 * \brief
 *    Free memory from mv
 * \par Input:
 *    int****** mv
 ************************************************************************
 */
void free_mem_mv (int***** mv)
{
  int i, j, k, l;

  for (i=0; i<4; i++)
  {
    for (j=0; j<4; j++)
    {
      for (k=0; k<img->buf_cycle; k++)
      {
        for (l=0; l<9; l++)
          free (mv[i][j][k][l]);
        free (mv[i][j][k]);
      }
      free (mv[i][j]);
    }
    free (mv[i]);
  }
  free (mv);
}





/*!
 ************************************************************************
 * \brief
 *    Allocate memory for AC coefficients
 ************************************************************************
 */
int get_mem_ACcoeff (int***** cofAC)
{
  int i, j, k;

  if ((*cofAC = (int****)calloc (6, sizeof(int***))) == NULL)              no_mem_exit ("get_mem_ACcoeff: cofAC");
  for (k=0; k<6; k++)
  {
    if (((*cofAC)[k] = (int***)calloc (4, sizeof(int**))) == NULL)         no_mem_exit ("get_mem_ACcoeff: cofAC");
    for (j=0; j<4; j++)
    {
      if (((*cofAC)[k][j] = (int**)calloc (2, sizeof(int*))) == NULL)      no_mem_exit ("get_mem_ACcoeff: cofAC");
      for (i=0; i<2; i++)
      {
        if (((*cofAC)[k][j][i] = (int*)calloc (65, sizeof(int))) == NULL)  no_mem_exit ("get_mem_ACcoeff: cofAC"); // 18->65 for ABT
      }
    }
  }
  return 6*4*2*65*sizeof(int);// 18->65 for ABT
}

/*!
 ************************************************************************
 * \brief
 *    Allocate memory for DC coefficients
 ************************************************************************
 */
int get_mem_DCcoeff (int**** cofDC)
{
  int j, k;

  if ((*cofDC = (int***)calloc (3, sizeof(int**))) == NULL)           no_mem_exit ("get_mem_DCcoeff: cofDC");
  for (k=0; k<3; k++)
  {
    if (((*cofDC)[k] = (int**)calloc (2, sizeof(int*))) == NULL)      no_mem_exit ("get_mem_DCcoeff: cofDC");
    for (j=0; j<2; j++)
    {
      if (((*cofDC)[k][j] = (int*)calloc (65, sizeof(int))) == NULL)  no_mem_exit ("get_mem_DCcoeff: cofDC"); // 18->65 for ABT
    }
  }
  return 3*2*65*sizeof(int); // 18->65 for ABT
}


/*!
 ************************************************************************
 * \brief
 *    Free memory of AC coefficients
 ************************************************************************
 */
void free_mem_ACcoeff (int**** cofAC)
{
  int i, j, k;

  for (k=0; k<6; k++)
  {
    for (i=0; i<4; i++)
    {
      for (j=0; j<2; j++)
      {
        free (cofAC[k][i][j]);
      }
      free (cofAC[k][i]);
    }
    free (cofAC[k]);
  }
  free (cofAC);
}

/*!
 ************************************************************************
 * \brief
 *    Free memory of DC coefficients
 ************************************************************************
 */
void free_mem_DCcoeff (int*** cofDC)
{
  int i, j;

  for (j=0; j<3; j++)
  {
    for (i=0; i<2; i++)
    {
      free (cofDC[j][i]);
    }
    free (cofDC[j]);
  }
  free (cofDC);
}


/*!
 ************************************************************************
 * \brief
 *    form frame picture from two field pictures 
 ************************************************************************
 */
void combine_field()
{
  int i;

  for (i=0; i<img->height / 2; i++)
  {
    memcpy(imgY_com[i*2], enc_top_picture->imgY[i], img->width);     // top field
    memcpy(imgY_com[i*2 + 1], enc_bottom_picture->imgY[i], img->width); // bottom field
  }

  for (i=0; i<img->height_cr / 2; i++)
  {
    memcpy(imgUV_com[0][i*2], enc_top_picture->imgUV[0][i], img->width_cr);
    memcpy(imgUV_com[0][i*2 + 1], enc_bottom_picture->imgUV[0][i], img->width_cr);
    memcpy(imgUV_com[1][i*2], enc_top_picture->imgUV[1][i], img->width_cr);
    memcpy(imgUV_com[1][i*2 + 1], enc_bottom_picture->imgUV[1][i], img->width_cr);
  }
}

/*!
 ************************************************************************
 * \brief
 *    RD decision of frame and field coding 
 ************************************************************************
 */
int decide_fld_frame(float snr_frame_Y, float snr_field_Y, int bit_field, int bit_frame, double lambda_picture)
{
  double cost_frame, cost_field;

  cost_frame = bit_frame * lambda_picture + snr_frame_Y;
  cost_field = bit_field * lambda_picture + snr_field_Y;

  if (cost_field > cost_frame)
    return (0);
  else
    return (1);
}

/*!
 ************************************************************************
 * \brief
 *    Do some initializaiton work for encoding the 2nd IGOP
 ************************************************************************
 */
void process_2nd_IGOP()
{
  Boolean FirstIGOPFinished = FALSE;
  if ( img->number == input->no_frames-1 )
    FirstIGOPFinished = TRUE;
  if (input->NumFrameIn2ndIGOP==0) return;
  if (!FirstIGOPFinished || In2ndIGOP) return;
  In2ndIGOP = TRUE;

//  img->number = -1;
  start_frame_no_in_this_IGOP = input->no_frames;
  start_tr_in_this_IGOP = (input->no_frames-1)*(input->jumpd+1) +1;
  input->no_frames = input->no_frames + input->NumFrameIn2ndIGOP;

/*  reset_buffers();

  frm->picbuf_short[0]->u