q_matrix.c

This program can encode the YUV vdieo format to H.264 and decode it.

 * \brief
 *    Free Q matrix arrays
 ***********************************************************************
 */
void free_QMatrix ()
{
  free(qp_rem_matrix);
  free(qp_per_matrix);

  free_mem4Dint(LevelScale4x4Luma,      2, 6);
  free_mem5Dint(LevelScale4x4Chroma, 2, 2, 6);
  free_mem4Dint(LevelScale8x8Luma,      2, 6);
  free_mem5Dint(LevelScale8x8Chroma, 2, 2, 6);

  free_mem4Dint(InvLevelScale4x4Luma,      2, 6);
  free_mem5Dint(InvLevelScale4x4Chroma, 2, 2, 6);
  free_mem4Dint(InvLevelScale8x8Luma,      2, 6);
  free_mem5Dint(InvLevelScale8x8Chroma, 2, 2, 6);
}


/*!
 ***********************************************************************
 * \brief
 *    Initialise Q matrix values.
 ***********************************************************************
 */
void Init_QMatrix (void)
{
  char *content;


  allocate_QMatrix ();

  if(input->ScalingMatrixPresentFlag)
  {
    printf ("Parsing QMatrix file %s ", input->QmatrixFile);
    content = GetConfigFileContent(input->QmatrixFile, 0);
    if(content!='\0')
      ParseMatrix(content, strlen (content));
    else
      printf("\nError: %s\nProceeding with default values for all matrices.", errortext);

    PatchMatrix();
    printf("\n");

    memset(UseDefaultScalingMatrix4x4Flag, 0, 6 * sizeof(short));
    memset(UseDefaultScalingMatrix8x8Flag, 0, 6 * sizeof(short));

    free(content);
  }
}

/*!
 ************************************************************************
 * \brief
 *    For calculating the quantisation values at frame level
 *
 * \par Input:
 *    none
 *
 * \par Output:
 *    none
 ************************************************************************
 */
void CalculateQuantParam(void)
{
  int i, j, k, temp;
  int present[6];
  int no_q_matrix=FALSE;

  if(!active_sps->seq_scaling_matrix_present_flag && !active_pps->pic_scaling_matrix_present_flag) //set to no q-matrix
    no_q_matrix=TRUE;
  else
  {
    memset(present, 0, sizeof(int)*6);

    if(active_sps->seq_scaling_matrix_present_flag)
      for(i=0; i<6; i++)
        present[i] = active_sps->seq_scaling_list_present_flag[i];

    if(active_pps->pic_scaling_matrix_present_flag)
      for(i=0; i<6; i++)
      {
        if((i==0) || (i==3))
          present[i] |= active_pps->pic_scaling_list_present_flag[i];
        else
          present[i] = active_pps->pic_scaling_list_present_flag[i];
      }
  }

  if(no_q_matrix==TRUE)
  {
    for(k=0; k<6; k++)
      for(j=0; j<4; j++)
        for(i=0; i<4; i++)
        {
          LevelScale4x4Luma[1][k][j][i]         = quant_coef[k][j][i];
          InvLevelScale4x4Luma[1][k][j][i]      = dequant_coef[k][j][i]<<4;

          LevelScale4x4Chroma[0][1][k][j][i]    = quant_coef[k][j][i];
          InvLevelScale4x4Chroma[0][1][k][j][i] = dequant_coef[k][j][i]<<4;

          LevelScale4x4Chroma[1][1][k][j][i]    = quant_coef[k][j][i];
          InvLevelScale4x4Chroma[1][1][k][j][i] = dequant_coef[k][j][i]<<4;

          // Inter
          LevelScale4x4Luma[0][k][j][i]         = quant_coef[k][j][i];
          InvLevelScale4x4Luma[0][k][j][i]      = dequant_coef[k][j][i]<<4;

          LevelScale4x4Chroma[0][0][k][j][i]    = quant_coef[k][j][i];
          InvLevelScale4x4Chroma[0][0][k][j][i] = dequant_coef[k][j][i]<<4;

          LevelScale4x4Chroma[1][0][k][j][i]    = quant_coef[k][j][i];
          InvLevelScale4x4Chroma[1][0][k][j][i] = dequant_coef[k][j][i]<<4;
        }
  }
  else
  {
    for(k=0; k<6; k++)
      for(j=0; j<4; j++)
        for(i=0; i<4; i++)
        {
          temp = (j<<2)+i;
          if((!present[0]) || UseDefaultScalingMatrix4x4Flag[0])
          {
            LevelScale4x4Luma[1][k][j][i]         = (quant_coef[k][j][i]<<4)/Quant_intra_default[temp];
            InvLevelScale4x4Luma[1][k][j][i]      = dequant_coef[k][j][i]*Quant_intra_default[temp];
          }
          else
          {
            LevelScale4x4Luma[1][k][j][i]         = (quant_coef[k][j][i]<<4)/ScalingList4x4[0][temp];
            InvLevelScale4x4Luma[1][k][j][i]      = dequant_coef[k][j][i]*ScalingList4x4[0][temp];
          }

          if(!present[1])
          {
            LevelScale4x4Chroma[0][1][k][j][i]    = LevelScale4x4Luma[1][k][j][i];
            InvLevelScale4x4Chroma[0][1][k][j][i] = InvLevelScale4x4Luma[1][k][j][i];
          }
          else
          {
            LevelScale4x4Chroma[0][1][k][j][i]    = (quant_coef[k][j][i]<<4)/(UseDefaultScalingMatrix4x4Flag[1] ? Quant_intra_default[temp]:ScalingList4x4[1][temp]);
            InvLevelScale4x4Chroma[0][1][k][j][i] = dequant_coef[k][j][i]*(UseDefaultScalingMatrix4x4Flag[1] ? Quant_intra_default[temp]:ScalingList4x4[1][temp]);
          }

          if(!present[2])
          {
            LevelScale4x4Chroma[1][1][k][j][i]    = LevelScale4x4Chroma[0][1][k][j][i];
            InvLevelScale4x4Chroma[1][1][k][j][i] = InvLevelScale4x4Chroma[0][1][k][j][i];
          }
          else
          {
            LevelScale4x4Chroma[1][1][k][j][i]    = (quant_coef[k][j][i]<<4)/(UseDefaultScalingMatrix4x4Flag[2] ? Quant_intra_default[temp]:ScalingList4x4[2][temp]);
            InvLevelScale4x4Chroma[1][1][k][j][i] = dequant_coef[k][j][i]*(UseDefaultScalingMatrix4x4Flag[2] ? Quant_intra_default[temp]:ScalingList4x4[2][temp]);
          }

          if((!present[3]) || UseDefaultScalingMatrix4x4Flag[3])
          {
            LevelScale4x4Luma[0][k][j][i]         = (quant_coef[k][j][i]<<4)/Quant_inter_default[temp];
            InvLevelScale4x4Luma[0][k][j][i]      = dequant_coef[k][j][i]*Quant_inter_default[temp];
          }
          else
          {
            LevelScale4x4Luma[0][k][j][i]         = (quant_coef[k][j][i]<<4)/ScalingList4x4[3][temp];
            InvLevelScale4x4Luma[0][k][j][i]      = dequant_coef[k][j][i]*ScalingList4x4[3][temp];
          }

          if(!present[4])
          {
            LevelScale4x4Chroma[0][0][k][j][i]    = LevelScale4x4Luma[0][k][j][i];
            InvLevelScale4x4Chroma[0][0][k][j][i] = InvLevelScale4x4Luma[0][k][j][i];
          }
          else
          {
            LevelScale4x4Chroma[0][0][k][j][i]    = (quant_coef[k][j][i]<<4)/(UseDefaultScalingMatrix4x4Flag[4] ? Quant_inter_default[temp]:ScalingList4x4[4][temp]);
            InvLevelScale4x4Chroma[0][0][k][j][i] = dequant_coef[k][j][i]*(UseDefaultScalingMatrix4x4Flag[4] ? Quant_inter_default[temp]:ScalingList4x4[4][temp]);
          }

          if(!present[5])
          {
            LevelScale4x4Chroma[1][0][k][j][i]    = LevelScale4x4Chroma[0][0][k][j][i];
            InvLevelScale4x4Chroma[1][0][k][j][i] = InvLevelScale4x4Chroma[0][0][k][j][i];
          }
          else
          {
            LevelScale4x4Chroma[1][0][k][j][i]    = (quant_coef[k][j][i]<<4)/(UseDefaultScalingMatrix4x4Flag[5] ? Quant_inter_default[temp]:ScalingList4x4[5][temp]);
            InvLevelScale4x4Chroma[1][0][k][j][i] = dequant_coef[k][j][i]*(UseDefaultScalingMatrix4x4Flag[5] ? Quant_inter_default[temp]:ScalingList4x4[5][temp]);
          }
        }
  }

  // setting for 4x4 luma quantization matrix
  if( IS_INDEPENDENT(input) )
  {
    if( img->colour_plane_id == 0 )
    {
      ptLevelScale4x4Luma    = LevelScale4x4Luma;
      ptInvLevelScale4x4Luma = InvLevelScale4x4Luma;
    }
    else if( img->colour_plane_id == 1 )
    {
      ptLevelScale4x4Luma    = LevelScale4x4Chroma[0];
      ptInvLevelScale4x4Luma = InvLevelScale4x4Chroma[0];
    }
    else if( img->colour_plane_id == 2 )
    {
      ptLevelScale4x4Luma    = LevelScale4x4Chroma[1];
      ptInvLevelScale4x4Luma = InvLevelScale4x4Chroma[1];
    }
  }
  else
  {
    ptLevelScale4x4Luma    = LevelScale4x4Luma;
    ptInvLevelScale4x4Luma = InvLevelScale4x4Luma;
  }

}

/*!
 ************************************************************************
 * \brief
 *    Calculate the quantisation and inverse quantisation parameters
 *
 ************************************************************************
 */
void CalculateQuant8Param()
{
  int i, j, k, temp;
  int n_ScalingList8x8;
  int present[6];
  int no_q_matrix=FALSE;

  // maximum number of valid 8x8 scaling lists
  n_ScalingList8x8 = ( active_sps->chroma_format_idc != 3 ) ? 2 : 6;

  if(!active_sps->seq_scaling_matrix_present_flag && !active_pps->pic_scaling_matrix_present_flag) //set to default matrix
    no_q_matrix=TRUE;
  else
  {
    memset(present, 0, sizeof(int)*n_ScalingList8x8);

    if(active_sps->seq_scaling_matrix_present_flag)
      for(i=0; i<n_ScalingList8x8; i++)
        present[i] = active_sps->seq_scaling_list_present_flag[i+6];

      if(active_pps->pic_scaling_matrix_present_flag)
        for(i=0; i<n_ScalingList8x8; i++)
        {
          if( i==0 || i==1 )
            present[i] |= active_pps->pic_scaling_list_present_flag[i+6];
          else
            present[i] = active_pps->pic_scaling_list_present_flag[i+6];
        }
  }

  if(no_q_matrix==TRUE)
  {
    for(k=0; k<6; k++)
      for(j=0; j<8; j++)
        for(i=0; i<8; i++)
        {
          // intra Y
          LevelScale8x8Luma[1][k][j][i]         = quant_coef8[k][j][i];
          InvLevelScale8x8Luma[1][k][j][i]      = dequant_coef8[k][j][i]<<4;

          // inter Y
          LevelScale8x8Luma[0][k][j][i]         = quant_coef8[k][j][i];
          InvLevelScale8x8Luma[0][k][j][i]      = dequant_coef8[k][j][i]<<4;

          if( n_ScalingList8x8 > 2 )  // 4:4:4 case only
          {
            // intra U
            LevelScale8x8Chroma[0][1][k][j][i]    = quant_coef8[k][j][i];
            InvLevelScale8x8Chroma[0][1][k][j][i] = dequant_coef8[k][j][i]<<4;

            // intra V
            LevelScale8x8Chroma[1][1][k][j][i]    = quant_coef8[k][j][i];
            InvLevelScale8x8Chroma[1][1][k][j][i] = dequant_coef8[k][j][i]<<4;

            // inter U
            LevelScale8x8Chroma[0][0][k][j][i]    = quant_coef8[k][j][i];
            InvLevelScale8x8Chroma[0][0][k][j][i] = dequant_coef8[k][j][i]<<4;

            // inter V
            LevelScale8x8Chroma[1][0][k][j][i]    = quant_coef8[k][j][i];
            InvLevelScale8x8Chroma[1][0][k][j][i] = dequant_coef8[k][j][i]<<4;
          }
        }
  }
  else
  {
    for(k=0; k<6; k++)
      for(j=0; j<8; j++)
        for(i=0; i<8; i++)
        {
          temp = (j<<3)+i;
          if((!present[0]) || UseDefaultScalingMatrix8x8Flag[0])
          {
            LevelScale8x8Luma[1][k][j][i]    = (quant_coef8[k][j][i]<<4)/Quant8_intra_default[temp];
            InvLevelScale8x8Luma[1][k][j][i] = dequant_coef8[k][j][i]*Quant8_intra_default[temp];
          }
          else
          {
            LevelScale8x8Luma[1][k][j][i]    = (quant_coef8[k][j][i]<<4)/ScalingList8x8[0][temp];
            InvLevelScale8x8Luma[1][k][j][i] = dequant_coef8[k][j][i]*ScalingList8x8[0][temp];
          }

          if((!present[1]) || UseDefaultScalingMatrix8x8Flag[1])
          {
            LevelScale8x8Luma[0][k][j][i]    = (quant_coef8[k][j][i]<<4)/Quant8_inter_default[temp];
            InvLevelScale8x8Luma[0][k][j][i] = dequant_coef8[k][j][i]*Quant8_inter_default[temp];
          }
          else
          {
            LevelScale8x8Luma[0][k][j][i]    = (quant_coef8[k][j][i]<<4)/ScalingList8x8[1][temp];
            InvLevelScale8x8Luma[0][k][j][i] = dequant_coef8[k][j][i]*ScalingList8x8[1][temp];
          }

          if( n_ScalingList8x8 > 2 )
          {

            // Intra U
            if(!present[2])
            {
              LevelScale8x8Chroma[0][1][k][j][i]    = LevelScale8x8Luma[1][k][j][i];
              InvLevelScale8x8Chroma[0][1][k][j][i] = InvLevelScale8x8Luma[1][k][j][i];
            }
            else
            {
              LevelScale8x8Chroma[0][1][k][j][i]    = (quant_coef8[k][j][i]<<4)/(UseDefaultScalingMatrix8x8Flag[2] ? Quant8_intra_default[temp]:ScalingList8x8[2][temp]);
              InvLevelScale8x8Chroma[0][1][k][j][i] = dequant_coef8[k][j][i]*(UseDefaultScalingMatrix8x8Flag[2] ? Quant8_intra_default[temp]:ScalingList8x8[2][temp]);
            }

            // Inter U
            if(!present[3])
            {
              LevelScale8x8Chroma[0][0][k][j][i]    = LevelScale8x8Luma[0][k][j][i];
              InvLevelScale8x8Chroma[0][0][k][j][i] = InvLevelScale8x8Luma[0][k][j][i];
            }
            else
            {
              LevelScale8x8Chroma[0][0][k][j][i]    = (quant_coef8[k][j][i]<<4)/(UseDefaultScalingMatrix8x8Flag[3] ? Quant8_inter_default[temp]:ScalingList8x8[3][temp]);
              InvLevelScale8x8Chroma[0][0][k][j][i] = dequant_coef8[k][j][i]*(UseDefaultScalingMatrix8x8Flag[3] ? Quant8_inter_default[temp]:ScalingList8x8[3][temp]);
            }

            // Intra V
            if(!present[4])
            {
              LevelScale8x8Chroma[1][1][k][j][i]    = LevelScale8x8Chroma[0][1][k][j][i];
              InvLevelScale8x8Chroma[1][1][k][j][i] = InvLevelScale8x8Chroma[0][1][k][j][i];
            }
            else
            {
              LevelScale8x8Chroma[1][1][k][j][i]    = (quant_coef8[k][j][i]<<4)/(UseDefaultScalingMatrix8x8Flag[4] ? Quant8_intra_default[temp]:ScalingList8x8[4][temp]);
              InvLevelScale8x8Chroma[1][1][k][j][i] = dequant_coef8[k][j][i]*(UseDefaultScalingMatrix8x8Flag[4] ? Quant8_intra_default[temp]:ScalingList8x8[4][temp]);
            }

            // Inter V
            if(!present[5])
            {
              LevelScale8x8Chroma[1][0][k][j][i]    = LevelScale8x8Chroma[0][0][k][j][i];
              InvLevelScale8x8Chroma[1][0][k][j][i] = InvLevelScale8x8Chroma[0][0][k][j][i];
            }
            else
            {
              LevelScale8x8Chroma[1][0][k][j][i]    = (quant_coef8[k][j][i]<<4)/(UseDefaultScalingMatrix8x8Flag[5] ? Quant8_inter_default[temp]:ScalingList8x8[5][temp]);
              InvLevelScale8x8Chroma[1][0][k][j][i] = dequant_coef8[k][j][i]*(UseDefaultScalingMatrix8x8Flag[5] ? Quant8_inter_default[temp]:ScalingList8x8[5][temp]);
            }

          }
        }
  }

  // setting for 8x8 luma quantization matrix
  if( IS_INDEPENDENT(input) )
  {
    if( img->colour_plane_id == 0 )
    {
      ptLevelScale8x8Luma    = LevelScale8x8Luma;
      ptInvLevelScale8x8Luma = InvLevelScale8x8Luma;
    }
    else if( img->colour_plane_id == 1 )
    {
      ptLevelScale8x8Luma    = LevelScale8x8Chroma[0];
      ptInvLevelScale8x8Luma = InvLevelScale8x8Chroma[0];
    }
    else if( img->colour_plane_id == 2 )
    {
      ptLevelScale8x8Luma    = LevelScale8x8Chroma[1];
      ptInvLevelScale8x8Luma = InvLevelScale8x8Chroma[1];
    }
  }
  else
  {
    ptLevelScale8x8Luma    = LevelScale8x8Luma;
    ptInvLevelScale8x8Luma = InvLevelScale8x8Luma;
  }

}