parset.c

此code含H.264解码需要的 lib和 src

      if(sps->vui_seq_parameters.colour_description_present_flag)
      {
        sps->vui_seq_parameters.colour_primaries              = u_v  ( 8,"VUI: colour_primaries"                  , s);
        sps->vui_seq_parameters.transfer_characteristics      = u_v  ( 8,"VUI: transfer_characteristics"          , s);
        sps->vui_seq_parameters.matrix_coefficients           = u_v  ( 8,"VUI: matrix_coefficients"               , s);
      }
    }
    sps->vui_seq_parameters.chroma_location_info_present_flag = u_1  (   "VUI: chroma_loc_info_present_flag"      , s);
    if(sps->vui_seq_parameters.chroma_location_info_present_flag)
    {
      sps->vui_seq_parameters.chroma_sample_loc_type_top_field     = ue_v  ( "VUI: chroma_sample_loc_type_top_field"    , s);
      sps->vui_seq_parameters.chroma_sample_loc_type_bottom_field  = ue_v  ( "VUI: chroma_sample_loc_type_bottom_field" , s);
    }
    sps->vui_seq_parameters.timing_info_present_flag          = u_1  ("VUI: timing_info_present_flag"           , s);
    if (sps->vui_seq_parameters.timing_info_present_flag)
    {
      sps->vui_seq_parameters.num_units_in_tick               = u_v  (32,"VUI: num_units_in_tick"               , s);
      sps->vui_seq_parameters.time_scale                      = u_v  (32,"VUI: time_scale"                      , s);
      sps->vui_seq_parameters.fixed_frame_rate_flag           = u_1  (   "VUI: fixed_frame_rate_flag"           , s);
    }
    sps->vui_seq_parameters.nal_hrd_parameters_present_flag   = u_1  ("VUI: nal_hrd_parameters_present_flag"    , s);
    if (sps->vui_seq_parameters.nal_hrd_parameters_present_flag)
    {
      ReadHRDParameters(p, &(sps->vui_seq_parameters.nal_hrd_parameters));
    }
    sps->vui_seq_parameters.vcl_hrd_parameters_present_flag   = u_1  ("VUI: vcl_hrd_parameters_present_flag"    , s);
    if (sps->vui_seq_parameters.vcl_hrd_parameters_present_flag)
    {
      ReadHRDParameters(p, &(sps->vui_seq_parameters.vcl_hrd_parameters));
    }
    if (sps->vui_seq_parameters.nal_hrd_parameters_present_flag || sps->vui_seq_parameters.vcl_hrd_parameters_present_flag)
    {
      sps->vui_seq_parameters.low_delay_hrd_flag             =  u_1  ("VUI: low_delay_hrd_flag"                 , s);
    }
    sps->vui_seq_parameters.pic_struct_present_flag          =  u_1  ("VUI: pic_struct_present_flag   "         , s);
    sps->vui_seq_parameters.bitstream_restriction_flag       =  u_1  ("VUI: bitstream_restriction_flag"         , s);
    if (sps->vui_seq_parameters.bitstream_restriction_flag)
    {
      sps->vui_seq_parameters.motion_vectors_over_pic_boundaries_flag =  u_1  ("VUI: motion_vectors_over_pic_boundaries_flag", s);
      sps->vui_seq_parameters.max_bytes_per_pic_denom                 =  ue_v ("VUI: max_bytes_per_pic_denom"                , s);
      sps->vui_seq_parameters.max_bits_per_mb_denom                   =  ue_v ("VUI: max_bits_per_mb_denom"                  , s);
      sps->vui_seq_parameters.log2_max_mv_length_horizontal           =  ue_v ("VUI: log2_max_mv_length_horizontal"          , s);
      sps->vui_seq_parameters.log2_max_mv_length_vertical             =  ue_v ("VUI: log2_max_mv_length_vertical"            , s);
      sps->vui_seq_parameters.num_reorder_frames                      =  ue_v ("VUI: num_reorder_frames"                     , s);
      sps->vui_seq_parameters.max_dec_frame_buffering                 =  ue_v ("VUI: max_dec_frame_buffering"                , s);
    }
  }

  return 0;
}


int ReadHRDParameters(DataPartition *p, hrd_parameters_t *hrd)
{
  Bitstream *s = p->bitstream;
  unsigned int SchedSelIdx;

  hrd->cpb_cnt_minus1                                      = ue_v (   "VUI: cpb_cnt_minus1"                       , s);
  hrd->bit_rate_scale                                      = u_v  ( 4,"VUI: bit_rate_scale"                       , s);
  hrd->cpb_size_scale                                      = u_v  ( 4,"VUI: cpb_size_scale"                       , s);

  for( SchedSelIdx = 0; SchedSelIdx <= hrd->cpb_cnt_minus1; SchedSelIdx++ )
  {
    hrd->bit_rate_value_minus1[ SchedSelIdx ]             = ue_v  ( "VUI: bit_rate_value_minus1"                  , s);
    hrd->cpb_size_value_minus1[ SchedSelIdx ]             = ue_v  ( "VUI: cpb_size_value_minus1"                  , s);
    hrd->cbr_flag[ SchedSelIdx ]                          = u_1   ( "VUI: cbr_flag"                               , s);
  }

  hrd->initial_cpb_removal_delay_length_minus1            = u_v  ( 5,"VUI: initial_cpb_removal_delay_length_minus1" , s);
  hrd->cpb_removal_delay_length_minus1                    = u_v  ( 5,"VUI: cpb_removal_delay_length_minus1"         , s);
  hrd->dpb_output_delay_length_minus1                     = u_v  ( 5,"VUI: dpb_output_delay_length_minus1"          , s);
  hrd->time_offset_length                                 = u_v  ( 5,"VUI: time_offset_length"          , s);

  return 0;
}


int InterpretPPS (DataPartition *p, pic_parameter_set_rbsp_t *pps)
{
  unsigned i;
  int NumberBitsPerSliceGroupId;
  Bitstream *s = p->bitstream;

  assert (p != NULL);
  assert (p->bitstream != NULL);
  assert (p->bitstream->streamBuffer != 0);
  assert (pps != NULL);

  UsedBits = 0;

  pps->pic_parameter_set_id                  = ue_v ("PPS: pic_parameter_set_id"                   , s);
  pps->seq_parameter_set_id                  = ue_v ("PPS: seq_parameter_set_id"                   , s);
  pps->entropy_coding_mode_flag              = u_1  ("PPS: entropy_coding_mode_flag"               , s);

  //fprintf(img->fpinfo, "PPS: pic_parameter_set_id                       (%3d)\n", pps->pic_parameter_set_id);
  //fprintf(img->fpinfo, "PPS: seq_parameter_set_id                       (%3d)\n", pps->seq_parameter_set_id);
  //fprintf(img->fpinfo, "PPS: entropy_coding_mode_flag                   (%3d)\n", pps->entropy_coding_mode_flag);  

  //! Note: as per JVT-F078 the following bit is unconditional.  If F078 is not accepted, then
  //! one has to fetch the correct SPS to check whether the bit is present (hopefully there is
  //! no consistency problem :-(
  //! The current encoder code handles this in the same way.  When you change this, don't forget
  //! the encoder!  StW, 12/8/02
  pps->pic_order_present_flag                = u_1  ("PPS: pic_order_present_flag"                 , s);
  //fprintf(img->fpinfo, "PPS: pic_order_present_flag                     (%3d)\n", pps->pic_order_present_flag);

  pps->num_slice_groups_minus1               = ue_v ("PPS: num_slice_groups_minus1"                , s);
  //fprintf(img->fpinfo, "PPS: num_slice_groups_minus1                    (%3d)\n", pps->num_slice_groups_minus1);

  // FMO stuff begins here
  if (pps->num_slice_groups_minus1 > 0)
  {
    pps->slice_group_map_type               = ue_v ("PPS: slice_group_map_type"                , s);

    if (pps->slice_group_map_type == 0)
    {
      for (i=0; i<=pps->num_slice_groups_minus1; i++)
        pps->run_length_minus1 [i]                  = ue_v ("PPS: run_length_minus1 [i]"              , s);
    }
    else if (pps->slice_group_map_type == 2)
    {
      for (i=0; i<pps->num_slice_groups_minus1; i++)
      {
        //! JVT-F078: avoid reference of SPS by using ue(v) instead of u(v)
        pps->top_left [i]                          = ue_v ("PPS: top_left [i]"                        , s);
        pps->bottom_right [i]                      = ue_v ("PPS: bottom_right [i]"                    , s);
      }
    }
    else if (pps->slice_group_map_type == 3 ||
             pps->slice_group_map_type == 4 ||
             pps->slice_group_map_type == 5)
    {
      pps->slice_group_change_direction_flag     = u_1  ("PPS: slice_group_change_direction_flag"      , s);
      pps->slice_group_change_rate_minus1        = ue_v ("PPS: slice_group_change_rate_minus1"         , s);
    }
    else if (pps->slice_group_map_type == 6)
    {
      if (pps->num_slice_groups_minus1+1 >4)
        NumberBitsPerSliceGroupId = 3;
      else if (pps->num_slice_groups_minus1+1 > 2)
        NumberBitsPerSliceGroupId = 2;
      else
        NumberBitsPerSliceGroupId = 1;
      //! JVT-F078, exlicitly signal number of MBs in the map
      pps->num_slice_group_map_units_minus1      = ue_v ("PPS: num_slice_group_map_units_minus1"               , s);
      for (i=0; i<=pps->num_slice_group_map_units_minus1; i++)
        pps->slice_group_id[i] = u_v (NumberBitsPerSliceGroupId, "slice_group_id[i]", s);
    }
  }

  // End of FMO stuff

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

  pps->chroma_qp_index_offset                = se_v ("PPS: chroma_qp_index_offset"                 , s);

  pps->deblocking_filter_control_present_flag = u_1 ("PPS: deblocking_filter_control_present_flag" , s);
  pps->constrained_intra_pred_flag           = u_1  ("PPS: constrained_intra_pred_flag"            , s);
  pps->redundant_pic_cnt_present_flag        = u_1  ("PPS: redundant_pic_cnt_present_flag"         , s);

  //fprintf(img->fpinfo, "PPS: num_ref_idx_l0_active_minus1               (%3d)\n", pps->num_ref_idx_l0_active_minus1);
  //fprintf(img->fpinfo, "PPS: num_ref_idx_l1_active_minus1               (%3d)\n", pps->num_ref_idx_l1_active_minus1);
  //fprintf(img->fpinfo, "PPS: weighted_pred_flag                         (%3d)\n", pps->weighted_pred_flag);
  //fprintf(img->fpinfo, "PPS: weighted_bipred_idc                        (%3d)\n", pps->weighted_bipred_idc);
  //fprintf(img->fpinfo, "PPS: pic_init_qp_minus26                        (%3d)\n", pps->pic_init_qp_minus26);
  //fprintf(img->fpinfo, "PPS: pic_init_qs_minus26                        (%3d)\n", pps->pic_init_qs_minus26);

  //fprintf(img->fpinfo, "PPS: chroma_qp_index_offset                     (%3d)\n", pps->chroma_qp_index_offset);

  //fprintf(img->fpinfo, "PPS: deblocking_filter_control_present_flag     (%3d)\n", pps->deblocking_filter_control_present_flag);
  //fprintf(img->fpinfo, "PPS: constrained_intra_pred_flag                (%3d)\n", pps->constrained_intra_pred_flag);
  //fprintf(img->fpinfo, "PPS: redundant_pic_cnt_present_flag             (%3d)\n", pps->redundant_pic_cnt_present_flag);
  
  if(more_rbsp_data(s->streamBuffer, s->frame_bitoffset,s->bitstream_length)) // more_data_in_rbsp()
  {
    //Fidelity Range Extensions Stuff
    pps->transform_8x8_mode_flag           = u_1  ("PPS: transform_8x8_mode_flag"                , s);
    pps->pic_scaling_matrix_present_flag   =  u_1  ("PPS: pic_scaling_matrix_present_flag"        , s);

	//fprintf(img->fpinfo, "PPS: transform_8x8_mode_flag                    (%3d)\n", pps->transform_8x8_mode_flag);
	//fprintf(img->fpinfo, "PPS: pic_scaling_matrix_present_flag            (%3d)\n", pps->pic_scaling_matrix_present_flag);

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

        if(pps->pic_scaling_list_present_flag[i])
        {
          if(i<6)
            Scaling_List(pps->ScalingList4x4[i], 16, &pps->UseDefaultScalingMatrix4x4Flag[i], s);
          else
            Scaling_List(pps->ScalingList8x8[i-6], 64, &pps->UseDefaultScalingMatrix8x8Flag[i-6], s);
        }
      }
    }

    pps->second_chroma_qp_index_offset      = se_v ("PPS: second_chroma_qp_index_offset"          , s);
	//fprintf(img->fpinfo, "PPS: second_chroma_qp_index_offset              (%3d)\n", pps->second_chroma_qp_index_offset);
  }
  else
  {
    pps->second_chroma_qp_index_offset      = pps->chroma_qp_index_offset;
  }

  pps->Valid = TRUE;
  return UsedBits;
}


void PPSConsistencyCheck (pic_parameter_set_rbsp_t *pps)
{
  printf ("Consistency checking a picture parset, to be implemented\n");
//  if (pps->seq_parameter_set_id invalid then do something)
}

void SPSConsistencyCheck (seq_parameter_set_rbsp_t *sps)
{
  printf ("Consistency checking a sequence parset, to be implemented\n");
}

void MakePPSavailable (int id, pic_parameter_set_rbsp_t *pps)
{
  assert (pps->Valid == TRUE);

  if (PicParSet[id].Valid == TRUE && PicParSet[id].slice_group_id != NULL)
    free (PicParSet[id].slice_group_id);

  memcpy (&PicParSet[id], pps, sizeof (pic_parameter_set_rbsp_t));

  // we can simply use the memory provided with the pps. the PPS is destroyed after this function
  // call and will not try to free if pps->slice_group_id == NULL
  PicParSet[id].slice_group_id = pps->slice_group_id;
  pps->slice_group_id          = NULL;
}

void CleanUpPPS()
{
  int i;

  for (i=0; i<MAXPPS; i++)
  {
    if (PicParSet[i].Valid == TRUE && PicParSet[i].slice_group_id != NULL)
      free (PicParSet[i].slice_group_id);

    PicParSet[i].Valid = FALSE;
  }
}


void MakeSPSavailable (int id, seq_parameter_set_rbsp_t *sps)
{
  assert (sps->Valid == TRUE);
  memcpy (&SeqParSet[id], sps, sizeof (seq_parameter_set_rbsp_t));
}


void ProcessSPS (NALU_t *nalu)
{
  DataPartition *dp = AllocPartition(1);
  seq_parameter_set_rbsp_t *sps = AllocSPS();
  int dummy;

  memcpy (dp->bitstream->streamBuffer, &nalu->buf[1], nalu->len-1);
  dp->bitstream->code_len = dp->bitstream->bitstream_length = RBSPtoSODB (dp->bitstream->streamBuffer, nalu->len-1);
  dp->bitstream->ei_flag = 0;
  dp->bitstream->read_len = dp->bitstream->frame_bitoffset = 0;

  dummy = InterpretSPS (dp, sps);

  //fprintf(img->fpinfo, "Width (%d)\n", (sps->pic_width_in_mbs_minus1 +1) * 16);
  //fprintf(img->fpinfo, "Height(%d)\n", ( 2 - sps->frame_mbs_only_flag ) * (sps->pic_height_in_map_units_minus1 +1) * 16);
 
  if (sps->Valid)
  {
    if (active_sps)
    {
      if (sps->seq_parameter_set_id == active_sps->seq_parameter_set_id)
      {
        if (!sps_is_equal(sps, active_sps))
        {
          if (dec_picture)
          {
            // this may only happen on slice loss
            exit_picture();
          }
          active_sps=NULL;