parset.c

H.264视频编解码的标准测试模型

    sps->seq_scaling_matrix_present_flag = (input->ScalingMatrixPresentFlag&1);
    for(i=0; i<8; i++)
    {
      if(i<6)
        sps->seq_scaling_list_present_flag[i] = (input->ScalingListPresentFlag[i]&1);
      else
      {
        if(input->Transform8x8Mode)
          sps->seq_scaling_list_present_flag[i] = (input->ScalingListPresentFlag[i]&1);
        else
          sps->seq_scaling_list_present_flag[i] = 0;
      }
    }
  }
  else
  {
    sps->seq_scaling_matrix_present_flag = 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 = (input->symbol_mode==UVLC?0:1);

  // Fidelity Range Extensions stuff
  if(frext_profile)
  {
    pps->transform_8x8_mode_flag = input->Transform8x8Mode ? 1:0;
    pps->pic_scaling_matrix_present_flag = (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 = 0;
    for(i=0; i<8; i++)
      pps->pic_scaling_list_present_flag[i] = 0;

    pps->transform_8x8_mode_flag = input->Transform8x8Mode = 0;
  }

  // JVT-Fxxx (by Stephan Wenger, make this flag unconditional
  pps->pic_order_present_flag = 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 = 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 = 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 = input->LFSendParameters;
  pps->constrained_intra_pred_flag = input->UseConstrainedIntraPred;
  
  pps->redundant_pic_cnt_present_flag = 0;
};

/*! 
 *************************************************************************************
 * \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))
  {