parset.c

JM 11.0 KTA 2.1 Source Code

  }
  else
  {
    sps->seq_scaling_matrix_present_flag = (Boolean)0;
    for(i=0; i<8; i++)
      sps->seq_scaling_list_present_flag[i] = 0;
    
  }
  
  
  if (img->auto_crop_right || img->auto_crop_bottom)
  {
    sps->frame_cropping_flag = TRUE;
    sps->frame_cropping_rect_left_offset=0;
    sps->frame_cropping_rect_top_offset=0;
    sps->frame_cropping_rect_right_offset=  (img->auto_crop_right / SubWidthC[sps->chroma_format_idc]);
    sps->frame_cropping_rect_bottom_offset= (img->auto_crop_bottom / (SubHeightC[sps->chroma_format_idc] * (2 - sps->frame_mbs_only_flag)));
    if (img->auto_crop_right % SubWidthC[sps->chroma_format_idc])
    {
      error("automatic frame cropping (width) not possible",500);
    }
    if (img->auto_crop_bottom % (SubHeightC[sps->chroma_format_idc] * (2 - sps->frame_mbs_only_flag)))
    {
      error("automatic frame cropping (height) not possible",500);
    }
  }
  else
  {
    sps->frame_cropping_flag = FALSE;
  }
};

/*!
************************************************************************
* \brief
*    GeneratePictureParameterSet: 
*    Generates a Picture Parameter Set structure
*
* \par
*    Regarding the QP
*    The previous software versions coded the absolute QP only in the 
*    slice header.  This is kept, and the offset in the PPS is coded 
*    even if we could save bits by intelligently using this field.
*
************************************************************************
*/

void GeneratePictureParameterSet( pic_parameter_set_rbsp_t *pps, //!< Picture Parameter Set to be filled
                                 seq_parameter_set_rbsp_t *sps, //!< used Sequence Parameter Set
                                 int PPS_id,                    //!< PPS ID
                                 int WeightedPrediction,        //!< value of weighted_pred_flag
                                 int WeightedBiprediction,      //!< value of weighted_bipred_idc
                                 int cb_qp_index_offset,        //!< value of cb_qp_index_offset
                                 int cr_qp_index_offset         //!< value of cr_qp_index_offset
                                 )
{
  unsigned i;
  
  int frext_profile = ((IdentifyProfile()==FREXT_HP) || 
    (IdentifyProfile()==FREXT_Hi10P) ||
    (IdentifyProfile()==FREXT_Hi422) ||
    (IdentifyProfile()==FREXT_Hi444));
  
  // *************************************************************************
  // Picture Parameter Set 
  // *************************************************************************
  
  pps->seq_parameter_set_id = sps->seq_parameter_set_id;
  pps->pic_parameter_set_id = PPS_id;
  pps->entropy_coding_mode_flag = (Boolean)(input->symbol_mode==UVLC?0:1);
#ifdef ADAPTIVE_FILTER
  pps->adaptive_filter_flag  = (Boolean)(input->UseAdaptiveFilter ? 1 : 0);
#else
  pps->adaptive_filter_flag = 0;
#endif
  // Fidelity Range Extensions stuff
  if(frext_profile)
  {
    pps->transform_8x8_mode_flag = (Boolean)(input->Transform8x8Mode ? 1:0);
    pps->pic_scaling_matrix_present_flag = (Boolean)((input->ScalingMatrixPresentFlag&2)>>1);

    for(i=0; i<8; i++)
    {
      if(i<6)
        pps->pic_scaling_list_present_flag[i] = (input->ScalingListPresentFlag[i]&2)>>1;
      else
      {
        if(pps->transform_8x8_mode_flag)
          pps->pic_scaling_list_present_flag[i] = (input->ScalingListPresentFlag[i]&2)>>1;
        else
          pps->pic_scaling_list_present_flag[i] = 0;
      }
    }
  }
  else
  {
    pps->pic_scaling_matrix_present_flag = (Boolean)0;
    for(i=0; i<8; i++)
      pps->pic_scaling_list_present_flag[i] = 0;
    
    input->Transform8x8Mode = 0;
    pps->transform_8x8_mode_flag = (Boolean)0;
  }
  
  // JVT-Fxxx (by Stephan Wenger, make this flag unconditional
  pps->pic_order_present_flag = (Boolean)img->pic_order_present_flag;
  
  
  // Begin FMO stuff
  pps->num_slice_groups_minus1 = input->num_slice_groups_minus1;
  
  
  //! Following set the parameter for different slice group types
  if (pps->num_slice_groups_minus1 > 0)
  {
    if ((pps->slice_group_id = calloc ((sps->pic_height_in_map_units_minus1+1)*(sps->pic_width_in_mbs_minus1+1), sizeof(byte))) == NULL)
      no_mem_exit ("GeneratePictureParameterSet: slice_group_id");
    
    switch (input->slice_group_map_type)
    {
    case 0:
      
      pps->slice_group_map_type = 0;
      for(i=0; i<=pps->num_slice_groups_minus1; i++)
      {
        pps->run_length_minus1[i]=input->run_length_minus1[i];
      }
      
      break;
    case 1:
      pps->slice_group_map_type = 1;
      break;
    case 2:
      // i loops from 0 to num_slice_groups_minus1-1, because no info for background needed
      pps->slice_group_map_type = 2;
      for(i=0; i<pps->num_slice_groups_minus1; i++)
      {
        pps->top_left[i] = input->top_left[i];
        pps->bottom_right[i] = input->bottom_right[i];      
      }
      break;
    case 3:
    case 4:
    case 5:
      pps->slice_group_map_type = input->slice_group_map_type;
      
      pps->slice_group_change_direction_flag = (Boolean)input->slice_group_change_direction_flag;
      pps->slice_group_change_rate_minus1 = input->slice_group_change_rate_minus1;
      break;
    case 6:
      pps->slice_group_map_type = 6;   
      pps->pic_size_in_map_units_minus1 = 
        (((input->img_height+img->auto_crop_bottom)/MB_BLOCK_SIZE)/(2-sps->frame_mbs_only_flag))
        *((input->img_width+img->auto_crop_right)/MB_BLOCK_SIZE) -1;
      
      for (i=0;i<=pps->pic_size_in_map_units_minus1; i++)
        pps->slice_group_id[i] = input->slice_group_id[i];
      
      break;
    default:
      printf ("Parset.c: slice_group_map_type invalid, default\n");
      assert (0==1);
    }
  }
  // End FMO stuff
  
  pps->num_ref_idx_l0_active_minus1 = sps->frame_mbs_only_flag ? (sps->num_ref_frames-1) : (2 * sps->num_ref_frames - 1) ;   // set defaults
  pps->num_ref_idx_l1_active_minus1 = sps->frame_mbs_only_flag ? (sps->num_ref_frames-1) : (2 * sps->num_ref_frames - 1) ;   // set defaults
  
  pps->weighted_pred_flag = (Boolean)WeightedPrediction;
  pps->weighted_bipred_idc = WeightedBiprediction;
  
  pps->pic_init_qp_minus26 = 0;         // hard coded to zero, QP lives in the slice header
  pps->pic_init_qs_minus26 = 0;
  
  pps->chroma_qp_index_offset = cb_qp_index_offset; 
  if (frext_profile)
  {
    pps->cb_qp_index_offset     = cb_qp_index_offset;
    pps->cr_qp_index_offset     = cr_qp_index_offset;
  }
  else
    pps->cb_qp_index_offset = pps->cr_qp_index_offset = pps->chroma_qp_index_offset;
  
  pps->deblocking_filter_control_present_flag = (Boolean)input->LFSendParameters;
  pps->constrained_intra_pred_flag = (Boolean)input->UseConstrainedIntraPred;
  
  // if redundant slice is in use.
  pps->redundant_pic_cnt_present_flag = (Boolean)input->redundant_pic_flag;
};

/*! 
*************************************************************************************
* \brief
*    syntax for scaling list matrix values
*
* \param scalingListinput
*    input scaling list
* \param scalingList
*    scaling list to be used
* \param sizeOfScalingList
*    size of the scaling list
* \param UseDefaultScalingMatrix
*    usage of default Scaling Matrix
* \param bitstream
*    target bitstream for writing syntax
*
* \return
*    size of the RBSP in bytes
*
*************************************************************************************
*/
int Scaling_List(short *scalingListinput, short *scalingList, int sizeOfScalingList, short *UseDefaultScalingMatrix, Bitstream *bitstream)
{
  int j, scanj;
  int len=0;
  int delta_scale, lastScale, nextScale;
  
  lastScale = 8;
  nextScale = 8;
  
  for(j=0; j<sizeOfScalingList; j++)
  {
    scanj = (sizeOfScalingList==16) ? ZZ_SCAN[j]:ZZ_SCAN8[j];
    
    if(nextScale!=0)
    {
      delta_scale = scalingListinput[scanj]-lastScale; // Calculate delta from the scalingList data from the input file
      if(delta_scale>127)
        delta_scale=delta_scale-256;
      else if(delta_scale<-128)
        delta_scale=delta_scale+256;
      
      len+=se_v ("   : delta_sl   ",                      delta_scale,                       bitstream);
      nextScale = scalingListinput[scanj];
      *UseDefaultScalingMatrix|=(scanj==0 && nextScale==0); // Check first matrix value for zero
    }
    
    scalingList[scanj] = (nextScale==0) ? lastScale:nextScale; // Update the actual scalingList matrix with the correct values
    lastScale = scalingList[scanj];
  }
  
  return len;
}


/*! 
*************************************************************************************
* \brief
*    int GenerateSeq_parameter_set_rbsp (seq_parameter_set_rbsp_t *sps, char *rbsp);
*
* \param sps
*    sequence parameter structure
* \param rbsp
*    buffer to be filled with the rbsp, size should be at least MAXIMUMPARSETRBSPSIZE
*
* \return
*    size of the RBSP in bytes
*
* \note
*    Sequence Parameter VUI function is called, but the function implements
*    an exit (-1)
*************************************************************************************
*/
int GenerateSeq_parameter_set_rbsp (seq_parameter_set_rbsp_t *sps, unsigned char *rbsp)
{
  Bitstream *bitstream;
  int len = 0, LenInBytes;
  unsigned i;
  
  assert (rbsp != NULL);
  
  if ((bitstream=calloc(1, sizeof(Bitstream)))==NULL) no_mem_exit("SeqParameterSet:bitstream");
  
  // .. and use the rbsp provided (or allocated above) for the data
  bitstream->streamBuffer = rbsp;
  bitstream->bits_to_go = 8;
  
  len+=u_v  (8, "SPS: profile_idc",                             sps->profile_idc,                               bitstream);
  
  len+=u_1  ("SPS: constrained_set0_flag",                      sps->constrained_set0_flag,    bitstream);
  len+=u_1  ("SPS: constrained_set1_flag",                      sps->constrained_set1_flag,    bitstream);
  len+=u_1  ("SPS: constrained_set2_flag",                      sps->constrained_set2_flag,    bitstream);
  len+=u_1  ("SPS: constrained_set3_flag",                      sps->constrained_set3_flag,    bitstream);
  len+=u_v  (4, "SPS: reserved_zero_4bits",                     0,                             bitstream);
  
  len+=u_v  (8, "SPS: level_idc",                               sps->level_idc,                                 bitstream);
  
  len+=ue_v ("SPS: seq_parameter_set_id",                    sps->seq_parameter_set_id,                      bitstream);
  
  // Fidelity Range Extensions stuff
  if((sps->profile_idc==FREXT_HP) || 
    (sps->profile_idc==FREXT_Hi10P) ||
    (sps->profile_idc==FREXT_Hi422) ||
    (sps->profile_idc==FREXT_Hi444))
  {
    len+=ue_v ("SPS: chroma_format_idc",                        sps->chroma_format_idc,                          bitstream);
    if(img->yuv_format == 3)
      len+=u_1  ("SPS: residue_transform_flag",                 img->residue_transform_flag,                     bitstream);
    len+=ue_v ("SPS: bit_depth_luma_minus8",                    sps->bit_depth_luma_minus8,                      bitstream);
    len+=ue_v ("SPS: bit_depth_chroma_minus8",                  sps->bit_depth_chroma_minus8,                    bitstream);
    len+=u_1  ("SPS: lossless_qpprime_y_zero_flag",             img->lossless_qpprime_flag,                      bitstream);
    //other chroma info to be added in the future
    
    len+=u_1 ("SPS: seq_scaling_matrix_present_flag",           sps->seq_scaling_matrix_present_flag,            bitstream);
    
    if(sps->seq_scaling_matrix_present_flag)
    {
      for(i=0; i<8; i++)
      {
        len+=u_1 ("SPS: seq_scaling_list_present_flag",         sps->seq_scaling_list_present_flag[i],           bitstream);
        if(sps->seq_scaling_list_present_flag[i])
        {
          if(i<6)
            len+=Scaling_List(ScalingList4x4input[i], ScalingList4x4[i], 16, &UseDefaultScalingMatrix4x4Flag[i], bitstream);
          else
            len+=Scaling_List(ScalingList8x8input[i-6], ScalingList8x8[i-6], 64, &UseDefaultScalingMatrix8x8Flag[i-6], bitstream);
        }
      }
    }
#ifdef ADAPTIVE_QUANTIZATION
    else  // no scaling list
    {
      InitScalingList();
    }
#endif
  }
  
  len+=ue_v ("SPS: log2_max_frame_num_minus4",               sps->log2_max_frame_num_minus4,                 bitstream);