parset.c

H.264视频编码器(ITU的264编码参考软件)

  len+=u_1  ("SPS: frame_cropping_flag",                      sps->frame_cropping_flag,                       partition);
  if (sps->frame_cropping_flag)
  {
    len+=ue_v ("SPS: frame_cropping_rect_left_offset",          sps->frame_cropping_rect_left_offset,           partition);
    len+=ue_v ("SPS: frame_cropping_rect_right_offset",         sps->frame_cropping_rect_right_offset,          partition);
    len+=ue_v ("SPS: frame_cropping_rect_top_offset",           sps->frame_cropping_rect_top_offset,            partition);
    len+=ue_v ("SPS: frame_cropping_rect_bottom_offset",        sps->frame_cropping_rect_bottom_offset,         partition);
  }

  len+=u_1  ("SPS: vui_parameters_present_flag",             sps->vui_parameters_present_flag,               partition);
  if (sps->vui_parameters_present_flag)
    len+=GenerateVUISequenceParameters(partition);    // currently a dummy, asserting

  SODBtoRBSP(partition->bitstream);     // copies the last couple of bits into the byte buffer
  
  LenInBytes=partition->bitstream->byte_pos;

  free (partition->bitstream);
  free (partition);
  
  return LenInBytes;
}


/*! 
 *************************************************************************************
 * \brief
 *    int GeneratePic_parameter_set_rbsp (pic_parameter_set_rbsp_t *sps, char *rbsp);
 *
 * \param pps
 *    picture parameter structure
 * \param rbsp
 *    buffer to be filled with the rbsp, size should be at least MAXIMUMPARSETRBSPSIZE
 *
 * \return
 *    size of the RBSP in bytes, negative in case of an error
 *
 * \note
 *    Picture Parameter VUI function is called, but the function implements
 *    an exit (-1)
 *************************************************************************************
 */
 
int GeneratePic_parameter_set_rbsp (pic_parameter_set_rbsp_t *pps, char *rbsp)
{
  DataPartition *partition;
  int len = 0, LenInBytes;
  unsigned i;
  unsigned NumberBitsPerSliceGroupId;
  int profile_idc;

  assert (rbsp != NULL);

  // In order to use the entropy coding functions from golomb.c we need 
  // to allocate a partition structure.  It will be freed later in this
  // function
  if ((partition=calloc(1,sizeof(DataPartition)))==NULL) no_mem_exit("PicParameterSet:partition");
  if ((partition->bitstream=calloc(1, sizeof(Bitstream)))==NULL) no_mem_exit("PicParameterSet:bitstream");
  // .. and use the rbsp provided (or allocated above) for the data
  partition->bitstream->streamBuffer = rbsp;
  partition->bitstream->bits_to_go = 8;
  //sw paff
  pps->pic_order_present_flag = img->pic_order_present_flag;

  len+=ue_v ("PPS: pic_parameter_set_id",                    pps->pic_parameter_set_id,                      partition);
  len+=ue_v ("PPS: seq_parameter_set_id",                    pps->seq_parameter_set_id,                      partition);
  len+=u_1  ("PPS: entropy_coding_mode_flag",                pps->entropy_coding_mode_flag,                  partition);
  len+=u_1  ("PPS: pic_order_present_flag",                  pps->pic_order_present_flag,                    partition);
  len+=ue_v ("PPS: num_slice_groups_minus1",                 pps->num_slice_groups_minus1,                   partition);

  // FMO stuff
  if(pps->num_slice_groups_minus1 > 0 )
  {
    len+=ue_v ("PPS: slice_group_map_type",                 pps->slice_group_map_type,                   partition);
    if (pps->slice_group_map_type == 0)
      for (i=0; i<=pps->num_slice_groups_minus1; i++)
        len+=ue_v ("PPS: run_length_minus1[i]",                           pps->run_length_minus1[i],                             partition);
    else if (pps->slice_group_map_type==2)
      for (i=0; i<pps->num_slice_groups_minus1; i++)
      {

        len+=ue_v ("PPS: top_left[i]",                          pps->top_left[i],                           partition);
        len+=ue_v ("PPS: bottom_right[i]",                      pps->bottom_right[i],                       partition);
      }
    else if (pps->slice_group_map_type == 3 ||
             pps->slice_group_map_type == 4 ||
             pps->slice_group_map_type == 5) 
    {
      len+=u_1  ("PPS: slice_group_change_direction_flag",         pps->slice_group_change_direction_flag,         partition);
      len+=ue_v ("PPS: slice_group_change_rate_minus1",            pps->slice_group_change_rate_minus1,            partition);
    } 
    else if (pps->slice_group_map_type == 6)
    {
      if (pps->num_slice_groups_minus1>=4)
        NumberBitsPerSliceGroupId=3;
      else if (pps->num_slice_groups_minus1>=2)
        NumberBitsPerSliceGroupId=2;
      else if (pps->num_slice_groups_minus1>=1)
        NumberBitsPerSliceGroupId=1;
      else
        NumberBitsPerSliceGroupId=0;
        
      len+=ue_v ("PPS: pic_size_in_map_units_minus1",          pps->pic_size_in_map_units_minus1,             partition);
      for(i=0; i<=pps->pic_size_in_map_units_minus1; i++)
        len+= u_v  (NumberBitsPerSliceGroupId, "PPS: >slice_group_id[i]",                            pps->slice_group_id[i],                         partition);
    }
  }
  // End of FMO stuff

  len+=ue_v ("PPS: num_ref_idx_l0_active_minus1",             pps->num_ref_idx_l0_active_minus1,              partition);
  len+=ue_v ("PPS: num_ref_idx_l1_active_minus1",             pps->num_ref_idx_l1_active_minus1,              partition);
  len+=u_1  ("PPS: weighted_pred_flag",                       pps->weighted_pred_flag,                        partition);
  len+=u_v  (2, "PPS: weighted_bipred_idc",                   pps->weighted_bipred_idc,                       partition);
  len+=se_v ("PPS: pic_init_qp_minus26",                      pps->pic_init_qp_minus26,                       partition);
  len+=se_v ("PPS: pic_init_qs_minus26",                      pps->pic_init_qs_minus26,                       partition);

  profile_idc = IdentifyProfile();
  if((profile_idc==FREXT_HP) || 
     (profile_idc==FREXT_Hi10P) ||
     (profile_idc==FREXT_Hi422) ||
     (profile_idc==FREXT_Hi444))
    len+=se_v ("PPS: chroma_qp_index_offset",                 pps->cb_qp_index_offset,                        partition);
  else
    len+=se_v ("PPS: chroma_qp_index_offset",                 pps->chroma_qp_index_offset,                    partition);

  len+=u_1  ("PPS: deblocking_filter_control_present_flag",   pps->deblocking_filter_control_present_flag,    partition);
  len+=u_1  ("PPS: constrained_intra_pred_flag",              pps->constrained_intra_pred_flag,               partition);
  len+=u_1  ("PPS: redundant_pic_cnt_present_flag",           pps->redundant_pic_cnt_present_flag,            partition);

  // Fidelity Range Extensions stuff
  if((profile_idc==FREXT_HP) || 
     (profile_idc==FREXT_Hi10P) ||
     (profile_idc==FREXT_Hi422) ||
     (profile_idc==FREXT_Hi444))
  {
    len+=u_1  ("PPS: transform_8x8_mode_flag",                pps->transform_8x8_mode_flag,                   partition);
    
    len+=u_1  ("PPS: pic_scaling_matrix_present_flag",        pps->pic_scaling_matrix_present_flag,           partition);

    if(pps->pic_scaling_matrix_present_flag)
    {
      for(i=0; i<(6+((unsigned)pps->transform_8x8_mode_flag<<1)); i++)
      {
        len+=u_1  ("PPS: pic_scaling_list_present_flag",      pps->pic_scaling_list_present_flag[i],          partition);

        if(pps->pic_scaling_list_present_flag[i])
        {
          if(i<6)
            len+=Scaling_List(ScalingList4x4input[i], ScalingList4x4[i], 16, &UseDefaultScalingMatrix4x4Flag[i], partition);
          else
            len+=Scaling_List(ScalingList8x8input[i-6], ScalingList8x8[i-6], 64, &UseDefaultScalingMatrix8x8Flag[i-6], partition);
        }
      }
    }
    len+=se_v ("PPS: second_chroma_qp_index_offset",          pps->cr_qp_index_offset,                        partition);
  }

  SODBtoRBSP(partition->bitstream);     // copies the last couple of bits into the byte buffer
  
  LenInBytes=partition->bitstream->byte_pos;

  // Get rid of the helper structures
  free (partition->bitstream);
  free (partition);

  return LenInBytes;
}



/*! 
 *************************************************************************************
 * \brief
 *    Returns the Profile
 *
 * \return
 *    Profile according to Annex A
 *
 * \note
 *    Function is currently a dummy.  Should "calculate" the profile from those
 *    config file parameters.  E.g.
 *
 *    Profile = Baseline;
 *    if (CABAC Used || Interlace used) Profile=Main;
 *    if (!Cabac Used) && (Bframes | SPframes) Profile = Streaming;
 *
 *************************************************************************************
 */
int IdentifyProfile()
{
  return input->ProfileIDC;
};

/*! 
 *************************************************************************************
 * \brief
 *    Returns the Level
 *
 * \return
 *    Level according to Annex A
 *
 * \note
 *    This function is currently a dummy, but should calculate the level out of 
 *    the config file parameters (primarily the picture size)
 *************************************************************************************
 */
int IdentifyLevel()
{
  return input->LevelIDC;
};


/*! 
 *************************************************************************************
 * \brief
 *    Returns the number of reference frame buffers
 *
 * \return
 *    Number of reference frame buffers used
 *
 * \note
 *    This function currently maps to input->num_ref_frames.  With all this interlace
 *    stuff this may or may not be correct.  If you determine a problem with the
 *    memory management for Interlace, then this could be one possible problem.
 *    However, so far no problem have been determined by my limited testing of
 *    a stupid 1950's technology :-)  StW, 11/27/02
 *************************************************************************************
 */

int IdentifyNumRefFrames()
{
  if(input->num_ref_frames > 16)error("no ref frames too large",-100);
  
  return input->num_ref_frames;
}


/*! 
 *************************************************************************************
 * \brief
 *    Function body for VUI Parameter generation (to be done)
 *
 * \return
 *    exits with error message
 *************************************************************************************
 */
static int GenerateVUISequenceParameters(DataPartition *partition)
{
  int len=0;

  // special case to signal the RGB format
  if(input->rgb_input_flag && input->yuv_format==3)
  { 
    //still pretty much a dummy VUI
    printf ("test: writing Sequence Parameter VUI to signal RGB format\n");
    len+=u_1 ("VUI: aspect_ratio_info_present_flag", 0, partition);
    len+=u_1 ("VUI: overscan_info_present_flag", 0, partition);
    len+=u_1 ("VUI: video_signal_type_present_flag", 1, partition);
    len+=u_v (3, "VUI: video format", 2, partition);
    len+=u_1 ("VUI: video_full_range_flag", 1, partition);
    len+=u_1 ("VUI: color_description_present_flag", 1, partition);
    len+=u_v (8, "VUI: colour primaries", 2, partition);
    len+=u_v (8, "VUI: transfer characteristics", 2, partition);
    len+=u_v (8, "VUI: matrix coefficients", 0, partition);
    len+=u_1 ("VUI: chroma_loc_info_present_flag", 0, partition);
    len+=u_1 ("VUI: timing_info_present_flag", 0, partition);
    len+=u_1 ("VUI: nal_hrd_parameters_present_flag", 0, partition);
    len+=u_1 ("VUI: vcl_hrd_parameters_present_flag", 0, partition);
    len+=u_1 ("VUI: pic_struc_present_flag", 0, partition);
    len+=u_1 ("VUI: bitstream_restriction_flag", 0, partition);

    return len;
  }
  else 
  {
    printf ("Sequence Parameter VUI not yet implemented, this should never happen, exit\n");
    exit (-1);
  }
}