q_matrix.c

G729、h263、h264、MPEG4四种最流行的音频和视频标准的压缩和解压算法的源代码.rar

          }
        }

        if(fail) //value of matrix exceed range
        {
          printf("\n%s value exceed range. (Value must be 1 to 255)\n", MatrixType4x4[i]);
          printf("Setting default values for this matrix.");
          if(i>2)
            memcpy(ScalingList, Quant_inter_default, sizeof(short)*16);
          else
            memcpy(ScalingList, Quant_intra_default, sizeof(short)*16);
        }
      }
      else //matrix not found, pad with default value
      {
        printf("\n%s matrix definition not found. Setting default values.", MatrixType4x4[i]);
        if(i>2)
          memcpy(ScalingList, Quant_inter_default, sizeof(short)*16);
        else
          memcpy(ScalingList, Quant_intra_default, sizeof(short)*16);
      }
    }

    if((i<2) && input->ScalingListPresentFlag[i+6])
    {
      ScalingList=ScalingList8x8input[i];
      if(matrix8x8_check[i])
      {
        fail=0;
        for(cnt=0; cnt<64; cnt++)
        {
          if(ScalingList[cnt]<0 || ScalingList[cnt]>255) // ScalingList[0]=0 to indicate use default matrix
          {
            fail=1;
            break;
          }
        }

        if(fail) //value of matrix exceed range
        {
          printf("\n%s value exceed range. (Value must be 1 to 255)\n", MatrixType8x8[i]);
          printf("Setting default values for this matrix.");
          if(i==7)
            memcpy(ScalingList, Quant8_inter_default, sizeof(short)*64);
          else
            memcpy(ScalingList, Quant8_intra_default, sizeof(short)*64);
        }
      }
      else //matrix not found, pad with default value
      {
        printf("\n%s matrix definition not found. Setting default values.", MatrixType8x8[i]);
        if(i==7)
          memcpy(ScalingList, Quant8_inter_default, sizeof(short)*64);
        else
          memcpy(ScalingList, Quant8_intra_default, sizeof(short)*64);
      }
    }
  }
}

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

  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, sizeof(short)*6);
    UseDefaultScalingMatrix8x8Flag[0]=UseDefaultScalingMatrix8x8Flag[1]=0;
  
    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_Intra[k][j][i]         = quant_coef[k][j][i];
          InvLevelScale4x4Luma_Intra[k][j][i]      = dequant_coef[k][j][i]<<4;

          LevelScale4x4Chroma_Intra[0][k][j][i]    = quant_coef[k][j][i];
          InvLevelScale4x4Chroma_Intra[0][k][j][i] = dequant_coef[k][j][i]<<4;

          LevelScale4x4Chroma_Intra[1][k][j][i]    = quant_coef[k][j][i];
          InvLevelScale4x4Chroma_Intra[1][k][j][i] = dequant_coef[k][j][i]<<4;

          LevelScale4x4Luma_Inter[k][j][i]         = quant_coef[k][j][i];
          InvLevelScale4x4Luma_Inter[k][j][i]      = dequant_coef[k][j][i]<<4;

          LevelScale4x4Chroma_Inter[0][k][j][i]    = quant_coef[k][j][i];
          InvLevelScale4x4Chroma_Inter[0][k][j][i] = dequant_coef[k][j][i]<<4;

          LevelScale4x4Chroma_Inter[1][k][j][i]    = quant_coef[k][j][i];
          InvLevelScale4x4Chroma_Inter[1][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 = (i<<2)+j;
          if((!present[0]) || UseDefaultScalingMatrix4x4Flag[0])
          {
            LevelScale4x4Luma_Intra[k][j][i]         = (quant_coef[k][j][i]<<4)/Quant_intra_default[temp];
            InvLevelScale4x4Luma_Intra[k][j][i]      = dequant_coef[k][j][i]*Quant_intra_default[temp];
          }
          else
          {
            LevelScale4x4Luma_Intra[k][j][i]         = (quant_coef[k][j][i]<<4)/ScalingList4x4[0][temp];
            InvLevelScale4x4Luma_Intra[k][j][i]      = dequant_coef[k][j][i]*ScalingList4x4[0][temp];
          }

          if(!present[1])
          {
            LevelScale4x4Chroma_Intra[0][k][j][i]    = LevelScale4x4Luma_Intra[k][j][i];
            InvLevelScale4x4Chroma_Intra[0][k][j][i] = InvLevelScale4x4Luma_Intra[k][j][i];
          }
          else
          {
            LevelScale4x4Chroma_Intra[0][k][j][i]    = (quant_coef[k][j][i]<<4)/(UseDefaultScalingMatrix4x4Flag[1] ? Quant_intra_default[temp]:ScalingList4x4[1][temp]);
            InvLevelScale4x4Chroma_Intra[0][k][j][i] = dequant_coef[k][j][i]*(UseDefaultScalingMatrix4x4Flag[1] ? Quant_intra_default[temp]:ScalingList4x4[1][temp]);
          }

          if(!present[2])
          {
            LevelScale4x4Chroma_Intra[1][k][j][i]    = LevelScale4x4Chroma_Intra[0][k][j][i];
            InvLevelScale4x4Chroma_Intra[1][k][j][i] = InvLevelScale4x4Chroma_Intra[0][k][j][i];
          }
          else
          {
            LevelScale4x4Chroma_Intra[1][k][j][i]    = (quant_coef[k][j][i]<<4)/(UseDefaultScalingMatrix4x4Flag[2] ? Quant_intra_default[temp]:ScalingList4x4[2][temp]);
            InvLevelScale4x4Chroma_Intra[1][k][j][i] = dequant_coef[k][j][i]*(UseDefaultScalingMatrix4x4Flag[2] ? Quant_intra_default[temp]:ScalingList4x4[2][temp]);
          }

          if((!present[3]) || UseDefaultScalingMatrix4x4Flag[3])
          {
            LevelScale4x4Luma_Inter[k][j][i]         = (quant_coef[k][j][i]<<4)/Quant_inter_default[temp];
            InvLevelScale4x4Luma_Inter[k][j][i]      = dequant_coef[k][j][i]*Quant_inter_default[temp];
          }
          else
          {
            LevelScale4x4Luma_Inter[k][j][i]         = (quant_coef[k][j][i]<<4)/ScalingList4x4[3][temp];
            InvLevelScale4x4Luma_Inter[k][j][i]      = dequant_coef[k][j][i]*ScalingList4x4[3][temp];
          }

          if(!present[4])
          {
            LevelScale4x4Chroma_Inter[0][k][j][i]    = LevelScale4x4Luma_Inter[k][j][i];
            InvLevelScale4x4Chroma_Inter[0][k][j][i] = InvLevelScale4x4Luma_Inter[k][j][i];
          }
          else
          {
            LevelScale4x4Chroma_Inter[0][k][j][i]    = (quant_coef[k][j][i]<<4)/(UseDefaultScalingMatrix4x4Flag[4] ? Quant_inter_default[temp]:ScalingList4x4[4][temp]);
            InvLevelScale4x4Chroma_Inter[0][k][j][i] = dequant_coef[k][j][i]*(UseDefaultScalingMatrix4x4Flag[4] ? Quant_inter_default[temp]:ScalingList4x4[4][temp]);
          }

          if(!present[5])
          {
            LevelScale4x4Chroma_Inter[1][k][j][i]    = LevelScale4x4Chroma_Inter[0][k][j][i];
            InvLevelScale4x4Chroma_Inter[1][k][j][i] = InvLevelScale4x4Chroma_Inter[0][k][j][i];
          }
          else
          {
            LevelScale4x4Chroma_Inter[1][k][j][i]    = (quant_coef[k][j][i]<<4)/(UseDefaultScalingMatrix4x4Flag[5] ? Quant_inter_default[temp]:ScalingList4x4[5][temp]);
            InvLevelScale4x4Chroma_Inter[1][k][j][i] = dequant_coef[k][j][i]*(UseDefaultScalingMatrix4x4Flag[5] ? Quant_inter_default[temp]:ScalingList4x4[5][temp]);
          }
        }
  }
}

/*!
 ************************************************************************
 * \brief
 *    Calculate the quantisation and inverse quantisation parameters
 *
 ************************************************************************
 */
void CalculateQuant8Param()
{
  int i, j, k, temp;
  int present[2];
  int no_q_matrix=FALSE;

  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)*2);

    if(active_sps->seq_scaling_matrix_present_flag)
      for(i=0; i<2; i++)
        present[i] = active_sps->seq_scaling_list_present_flag[i+6];

    if(active_pps->pic_scaling_matrix_present_flag)
      for(i=0; i<2; i++)
        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++)
        {
          LevelScale8x8Luma_Intra[k][j][i]         = quant_coef8[k][j][i];
          InvLevelScale8x8Luma_Intra[k][j][i]      = dequant_coef8[k][j][i]<<4;

          LevelScale8x8Luma_Inter[k][j][i]         = quant_coef8[k][j][i];
          InvLevelScale8x8Luma_Inter[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 = (i<<3)+j;
          if((!present[0]) || UseDefaultScalingMatrix8x8Flag[0])
          {
            LevelScale8x8Luma_Intra[k][j][i]    = (quant_coef8[k][j][i]<<4)/Quant8_intra_default[temp];
            InvLevelScale8x8Luma_Intra[k][j][i] = dequant_coef8[k][j][i]*Quant8_intra_default[temp];
          }
          else
          {
            LevelScale8x8Luma_Intra[k][j][i]    = (quant_coef8[k][j][i]<<4)/ScalingList8x8[0][temp];
            InvLevelScale8x8Luma_Intra[k][j][i] = dequant_coef8[k][j][i]*ScalingList8x8[0][temp];
          }

          if((!present[1]) || UseDefaultScalingMatrix8x8Flag[1])
          {
            LevelScale8x8Luma_Inter[k][j][i]    = (quant_coef8[k][j][i]<<4)/Quant8_inter_default[temp];
            InvLevelScale8x8Luma_Inter[k][j][i] = dequant_coef8[k][j][i]*Quant8_inter_default[temp];
          }
          else
          {
            LevelScale8x8Luma_Inter[k][j][i]    = (quant_coef8[k][j][i]<<4)/ScalingList8x8[1][temp];
            InvLevelScale8x8Luma_Inter[k][j][i] = dequant_coef8[k][j][i]*ScalingList8x8[1][temp];
          }
        }
  }
}