parset.c

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#include "global.h"
#include "image.h"
#include "parsetcommon.h"
#include "parset.h"
#include "nalu.h"
#include "memalloc.h"
#include "fmo.h"
#include "cabac.h"
#include "vlc.h"
#include "mbuffer.h"
#include "erc_api.h"

#if TRACE
#define SYMTRACESTRING(s) strncpy(sym->tracestring,s,TRACESTRING_SIZE)
#else
#define SYMTRACESTRING(s) // do nothing
#endif

const byte ZZ_SCAN[16]  =
{  0,  1,  4,  8,  5,  2,  3,  6,  9, 12, 13, 10,  7, 11, 14, 15
};

const byte ZZ_SCAN8[64] =
{  0,  1,  8, 16,  9,  2,  3, 10, 17, 24, 32, 25, 18, 11,  4,  5,
   12, 19, 26, 33, 40, 48, 41, 34, 27, 20, 13,  6,  7, 14, 21, 28,
   35, 42, 49, 56, 57, 50, 43, 36, 29, 22, 15, 23, 30, 37, 44, 51,
   58, 59, 52, 45, 38, 31, 39, 46, 53, 60, 61, 54, 47, 55, 62, 63
};

extern int UsedBits;      // for internal statistics, is adjusted by se_v, ue_v, u_1
extern ColocatedParams *Co_located;
extern ColocatedParams *Co_located_JV[MAX_PLANE];  

extern int quant_intra_default[16];
extern int quant_inter_default[16];
extern int quant8_intra_default[64];
extern int quant8_inter_default[64];

seq_parameter_set_rbsp_t SeqParSet[MAXSPS];
pic_parameter_set_rbsp_t PicParSet[MAXPPS];

extern StorablePicture* dec_picture;

extern void init_frext(ImageParameters *img);

// syntax for scaling list matrix values
void Scaling_List(int *scalingList, int sizeOfScalingList, Boolean *UseDefaultScalingMatrix, Bitstream *s)
{
  int j, scanj;
  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 = se_v (   "   : delta_sl   "                           , s);
      nextScale = (lastScale + delta_scale + 256) % 256;
      *UseDefaultScalingMatrix = (Boolean) (scanj==0 && nextScale==0);
    }

    scalingList[scanj] = (nextScale==0) ? lastScale:nextScale;
    lastScale = scalingList[scanj];
  }
}
// fill sps with content of p

int InterpretSPS (DataPartition *p, seq_parameter_set_rbsp_t *sps)
{
  unsigned i;
  unsigned n_ScalingList;
  int reserved_zero;
  Bitstream *s = p->bitstream;

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

  UsedBits = 0;

  sps->profile_idc                            = u_v  (8, "SPS: profile_idc"                           , s);

  if ((sps->profile_idc!=BASELINE       ) &&
      (sps->profile_idc!=MAIN           ) &&
      (sps->profile_idc!=EXTENDED       ) &&
      (sps->profile_idc!=FREXT_HP       ) &&
      (sps->profile_idc!=FREXT_Hi10P    ) &&
      (sps->profile_idc!=FREXT_Hi422    ) &&
      (sps->profile_idc!=FREXT_Hi444    ) &&
      (sps->profile_idc!=FREXT_CAVLC444 ))
  {
    return UsedBits;
  }

  sps->constrained_set0_flag                  = u_1  (   "SPS: constrained_set0_flag"                 , s);
  sps->constrained_set1_flag                  = u_1  (   "SPS: constrained_set1_flag"                 , s);
  sps->constrained_set2_flag                  = u_1  (   "SPS: constrained_set2_flag"                 , s);
  sps->constrained_set3_flag                  = u_1  (   "SPS: constrained_set3_flag"                 , s);
  reserved_zero                               = u_v  (4, "SPS: reserved_zero_4bits"                   , s);
  assert (reserved_zero==0);

  sps->level_idc                              = u_v  (8, "SPS: level_idc"                             , s);

  sps->seq_parameter_set_id                   = ue_v ("SPS: seq_parameter_set_id"                     , s);

  // Fidelity Range Extensions stuff
  sps->chroma_format_idc = 1;
  sps->bit_depth_luma_minus8   = 0;
  sps->bit_depth_chroma_minus8 = 0;
  img->lossless_qpprime_flag   = 0;
  sps->separate_colour_plane_flag = 0;

  if((sps->profile_idc==FREXT_HP   ) ||
     (sps->profile_idc==FREXT_Hi10P) ||
     (sps->profile_idc==FREXT_Hi422) ||
     (sps->profile_idc==FREXT_Hi444) ||
     (sps->profile_idc==FREXT_CAVLC444))
  {
    sps->chroma_format_idc                      = ue_v ("SPS: chroma_format_idc"                       , s);

    if(sps->chroma_format_idc == YUV444)
    {
      sps->separate_colour_plane_flag           = u_1  ("SPS: separate_colour_plane_flag"              , s);
    }

    sps->bit_depth_luma_minus8                  = ue_v ("SPS: bit_depth_luma_minus8"                   , s);
    sps->bit_depth_chroma_minus8                = ue_v ("SPS: bit_depth_chroma_minus8"                 , s);
    img->lossless_qpprime_flag                  = u_1  ("SPS: lossless_qpprime_y_zero_flag"            , s);

    sps->seq_scaling_matrix_present_flag        = u_1  (   "SPS: seq_scaling_matrix_present_flag"       , s);

    if(sps->seq_scaling_matrix_present_flag)
    {
      n_ScalingList = (sps->chroma_format_idc != YUV444) ? 8 : 12;
      for(i=0; i<n_ScalingList; i++)
      {
        sps->seq_scaling_list_present_flag[i]   = u_1  (   "SPS: seq_scaling_list_present_flag"         , s);
        if(sps->seq_scaling_list_present_flag[i])
        {
          if(i<6)
            Scaling_List(sps->ScalingList4x4[i], 16, &sps->UseDefaultScalingMatrix4x4Flag[i], s);
          else
            Scaling_List(sps->ScalingList8x8[i-6], 64, &sps->UseDefaultScalingMatrix8x8Flag[i-6], s);
        }
      }
    }
  }

  sps->log2_max_frame_num_minus4              = ue_v ("SPS: log2_max_frame_num_minus4"                , s);
  sps->pic_order_cnt_type                     = ue_v ("SPS: pic_order_cnt_type"                       , s);

  if (sps->pic_order_cnt_type == 0)
    sps->log2_max_pic_order_cnt_lsb_minus4 = ue_v ("SPS: log2_max_pic_order_cnt_lsb_minus4"           , s);
  else if (sps->pic_order_cnt_type == 1)
  {
    sps->delta_pic_order_always_zero_flag      = u_1  ("SPS: delta_pic_order_always_zero_flag"       , s);
    sps->offset_for_non_ref_pic                = se_v ("SPS: offset_for_non_ref_pic"                 , s);
    sps->offset_for_top_to_bottom_field        = se_v ("SPS: offset_for_top_to_bottom_field"         , s);
    sps->num_ref_frames_in_pic_order_cnt_cycle = ue_v ("SPS: num_ref_frames_in_pic_order_cnt_cycle"  , s);
    for(i=0; i<sps->num_ref_frames_in_pic_order_cnt_cycle; i++)
      sps->offset_for_ref_frame[i]               = se_v ("SPS: offset_for_ref_frame[i]"              , s);
  }
  sps->num_ref_frames                        = ue_v ("SPS: num_ref_frames"                         , s);
  sps->gaps_in_frame_num_value_allowed_flag  = u_1  ("SPS: gaps_in_frame_num_value_allowed_flag"   , s);
  sps->pic_width_in_mbs_minus1               = ue_v ("SPS: pic_width_in_mbs_minus1"                , s);
  sps->pic_height_in_map_units_minus1        = ue_v ("SPS: pic_height_in_map_units_minus1"         , s);
  sps->frame_mbs_only_flag                   = u_1  ("SPS: frame_mbs_only_flag"                    , s);
  if (!sps->frame_mbs_only_flag)
  {
    sps->mb_adaptive_frame_field_flag        = u_1  ("SPS: mb_adaptive_frame_field_flag"           , s);
  }
  sps->direct_8x8_inference_flag             = u_1  ("SPS: direct_8x8_inference_flag"              , s);
  sps->frame_cropping_flag                   = u_1  ("SPS: frame_cropping_flag"                    , s);

  if (sps->frame_cropping_flag)
  {
    sps->frame_cropping_rect_left_offset      = ue_v ("SPS: frame_cropping_rect_left_offset"           , s);
    sps->frame_cropping_rect_right_offset     = ue_v ("SPS: frame_cropping_rect_right_offset"          , s);
    sps->frame_cropping_rect_top_offset       = ue_v ("SPS: frame_cropping_rect_top_offset"            , s);
    sps->frame_cropping_rect_bottom_offset    = ue_v ("SPS: frame_cropping_rect_bottom_offset"         , s);
  }
  sps->vui_parameters_present_flag           = (Boolean) u_1  ("SPS: vui_parameters_present_flag"      , s);

  InitVUI(sps);
  ReadVUI(p, sps);

  sps->Valid = TRUE;

  return UsedBits;
}


void InitVUI(seq_parameter_set_rbsp_t *sps)
{
  sps->vui_seq_parameters.matrix_coefficients = 2;
}


int ReadVUI(DataPartition *p, seq_parameter_set_rbsp_t *sps)
{
  Bitstream *s = p->bitstream;
  if (sps->vui_parameters_present_flag)
  {
    sps->vui_seq_parameters.aspect_ratio_info_present_flag = u_1  ("VUI: aspect_ratio_info_present_flag"   , s);
    if (sps->vui_seq_parameters.aspect_ratio_info_present_flag)
    {
      sps->vui_seq_parameters.aspect_ratio_idc             = u_v  ( 8, "VUI: aspect_ratio_idc"              , s);
      if (255==sps->vui_seq_parameters.aspect_ratio_idc)
      {
        sps->vui_seq_parameters.sar_width                  = u_v  (16, "VUI: sar_width"                     , s);
        sps->vui_seq_parameters.sar_height                 = u_v  (16, "VUI: sar_height"                    , s);
      }
  }

    sps->vui_seq_parameters.overscan_info_present_flag     = u_1  ("VUI: overscan_info_present_flag"        , s);
    if (sps->vui_seq_parameters.overscan_info_present_flag)
    {
      sps->vui_seq_parameters.overscan_appropriate_flag    = u_1  ("VUI: overscan_appropriate_flag"         , s);
    }

    sps->vui_seq_parameters.video_signal_type_present_flag = u_1  ("VUI: video_signal_type_present_flag"    , s);
    if (sps->vui_seq_parameters.video_signal_type_present_flag)
    {
      sps->vui_seq_parameters.video_format                    = u_v  ( 3,"VUI: video_format"                      , s);
      sps->vui_seq_parameters.video_full_range_flag           = u_1  (   "VUI: video_full_range_flag"             , s);
      sps->vui_seq_parameters.colour_description_present_flag = u_1  (   "VUI: color_description_present_flag"    , s);
      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;
  unsigned n_ScalingList;
  int chroma_format_idc;
  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);

  pps->pic_order_present_flag                = u_1  ("PPS: pic_order_present_flag"                 , s);

  pps->num_slice_groups_minus1               = ue_v ("PPS: num_slice_groups_minus1"                , s);

  // 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++)
      {
        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;
      pps->num_slice_group_map_units_minus1      = ue_v ("PPS: num_slice_group_map_units_minus1"               , s);
      if ((pps->slice_group_id = calloc (pps->num_slice_group_map_units_minus1+1, 1)) == NULL)
        no_mem_exit ("InterpretPPS: slice_group_id");
      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);

  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);

    if(pps->pic_scaling_matrix_present_flag)
    {
      chroma_format_idc = SeqParSet[pps->seq_parameter_set_id].chroma_format_idc;
      n_ScalingList = 6 + ((chroma_format_idc != YUV444) ? 2 : 6) * pps->transform_8x8_mode_flag;
      for(i=0; i<n_ScalingList; 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);
  }
  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();

  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;
  InterpretSPS (dp, sps);

  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(&dec_picture);
          }
          active_sps=NULL;
        }
      }
    }
    // SPSConsistencyCheck (pps);
    MakeSPSavailable (sps->seq_parameter_set_id, sps);
    img->profile_idc = sps->profile_idc;
    img->separate_colour_plane_flag = sps->separate_colour_plane_flag;
    if( img->separate_colour_plane_flag )
    {
      img->ChromaArrayType = 0;
    }
    else
    {
      img->ChromaArrayType = sps->chroma_format_idc;
    }
  }

  FreePartition (dp, 1);
  FreeSPS (sps);
}


void ProcessPPS (NALU_t *nalu)
{
  DataPartition *dp;
  pic_parameter_set_rbsp_t *pps;

  dp = AllocPartition(1);
  pps = AllocPPS();
  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;
  InterpretPPS (dp, pps);
  // PPSConsistencyCheck (pps);
  if (active_pps)
  {
    if (pps->pic_parameter_set_id == active_pps->pic_parameter_set_id)
    {
      if (!pps_is_equal(pps, active_pps))
      {
        if (dec_picture)
        {
          // this may only happen on slice loss
          exit_picture(&dec_picture);
        }
        active_pps = NULL;
      }
    }
  }
  MakePPSavailable (pps->pic_parameter_set_id, pps);
  FreePartition (dp, 1);
  FreePPS (pps);
}

void activate_sps (seq_parameter_set_rbsp_t *sps)
{
  int nplane;
  if (active_sps != sps)
  {
    if (dec_picture)
    {
      // this may only happen on slice loss
      exit_picture(&dec_picture);
    }
    active_sps = sps;

    img->bitdepth_chroma = 0;
    img->width_cr        = 0;
    img->height_cr       = 0;

    // maximum vertical motion vector range in luma quarter pixel units
    if (active_sps->level_idc <= 10)
    {
      img->max_vmv_r = 64 * 4;
    }
    else if (active_sps->level_idc <= 20)
    {
      img->max_vmv_r = 128 * 4;
    }
    else if (active_sps->level_idc <= 30)
    {
      img->max_vmv_r = 256 * 4;
    }
    else
    {
      img->max_vmv_r = 512 * 4; // 512 pixels in quarter pixels
    }

    // Fidelity Range Extensions stuff (part 1)
    img->bitdepth_luma       = sps->bit_depth_luma_minus8 + 8;
    img->bitdepth_scale[0]   = 1 << sps->bit_depth_luma_minus8;
    if (sps->chroma_format_idc != YUV400)
    {
      img->bitdepth_chroma   = sps->bit_depth_chroma_minus8 + 8;
      img->bitdepth_scale[1] = 1 << sps->bit_depth_chroma_minus8;
    }

    img->MaxFrameNum = 1<<(sps->log2_max_frame_num_minus4+4);
    img->PicWidthInMbs = (sps->pic_width_in_mbs_minus1 +1);
    img->PicHeightInMapUnits = (sps->pic_height_in_map_units_minus1 +1);
    img->FrameHeightInMbs = ( 2 - sps->frame_mbs_only_flag ) * img->PicHeightInMapUnits;
    img->FrameSizeInMbs = img->PicWidthInMbs * img->FrameHeightInMbs;

    img->yuv_format=sps->chroma_format_idc;

    img->width = img->PicWidthInMbs * MB_BLOCK_SIZE;
    img->height = img->FrameHeightInMbs * MB_BLOCK_SIZE;

    if (sps->chroma_format_idc == YUV420)
    {
      img->width_cr = img->width >>1;
      img->height_cr = img->height >>1;
    }
    else if (sps->chroma_format_idc == YUV422)
    {
      img->width_cr = img->width >>1;
      img->height_cr = img->height;
    }
    else if (sps->chroma_format_idc == YUV444)
    {
      //YUV444
      img->width_cr = img->width;
      img->height_cr = img->height;
    }

    img->width_cr_m1 = img->width_cr - 1;
    
    init_frext(img);
    init_global_buffers();

    if (!img->no_output_of_prior_pics_flag)
    {
      flush_dpb();
    }
    init_dpb();

    if( IS_INDEPENDENT(img) )
    {
      for( nplane=0; nplane<MAX_PLANE; nplane++ )
      {
        if( NULL != Co_located_JV[nplane] )
        {
          free_colocated(Co_located_JV[nplane]);        
        }
        Co_located_JV[nplane] = alloc_colocated (img->width, img->height,sps->mb_adaptive_frame_field_flag);      
      }
    }
    else
    {
      if (NULL!=Co_located)
      {
        free_colocated(Co_located);
      }
      Co_located = alloc_colocated (img->width, img->height,sps->mb_adaptive_frame_field_flag);
    }

    ercInit(img->width, img->height, 1);
  }
}

void activate_pps(pic_parameter_set_rbsp_t *pps)
{
  if (active_pps != pps)
  {
    if (dec_picture)
    {
      // this may only happen on slice loss
      exit_picture(&dec_picture);
    }

    active_pps = pps;

    // Fidelity Range Extensions stuff (part 2)
    img->Transform8x8Mode = pps->transform_8x8_mode_flag;

  }
}

void UseParameterSet (int PicParsetId)
{
  seq_parameter_set_rbsp_t *sps = &SeqParSet[PicParSet[PicParsetId].seq_parameter_set_id];
  pic_parameter_set_rbsp_t *pps = &PicParSet[PicParsetId];
  int i;


  if (PicParSet[PicParsetId].Valid != TRUE)
    printf ("Trying to use an invalid (uninitialized) Picture Parameter Set with ID %d, expect the unexpected...\n", PicParsetId);
  if (SeqParSet[PicParSet[PicParsetId].seq_parameter_set_id].Valid != TRUE)
    printf ("PicParset %d references an invalid (uninitialized) Sequence Parameter Set with ID %d, expect the unexpected...\n", PicParsetId, (int) PicParSet[PicParsetId].seq_parameter_set_id);

  sps =  &SeqParSet[PicParSet[PicParsetId].seq_parameter_set_id];


  // In theory, and with a well-designed software, the lines above
  // are everything necessary.  In practice, we need to patch many values
  // in img-> (but no more in inp-> -- these have been taken care of)

  // Sequence Parameter Set Stuff first

//  printf ("Using Picture Parameter set %d and associated Sequence Parameter Set %d\n", PicParsetId, PicParSet[PicParsetId].seq_parameter_set_id);

  if ((int) sps->pic_order_cnt_type < 0 || sps->pic_order_cnt_type > 2)  // != 1
  {
    printf ("invalid sps->pic_order_cnt_type = %d\n", (int) sps->pic_order_cnt_type);
    error ("pic_order_cnt_type != 1", -1000);
  }

  if (sps->pic_order_cnt_type == 1)
  {
    if(sps->num_ref_frames_in_pic_order_cnt_cycle >= MAXnum_ref_frames_in_pic_order_cnt_cycle)
    {
      error("num_ref_frames_in_pic_order_cnt_cycle too large",-1011);
    }
  }

  activate_sps(sps);
  activate_pps(pps);


  // currSlice->dp_mode is set by read_new_slice (NALU first byte available there)
  if (pps->entropy_coding_mode_flag == UVLC)
  {
    nal_startcode_follows = uvlc_startcode_follows;
    for (i=0; i<3; i++)
    {
      img->currentSlice->partArr[i].readSyntaxElement = readSyntaxElement_UVLC;
    }
  }
  else
  {
    nal_startcode_follows = cabac_startcode_follows;
    for (i=0; i<3; i++)
    {
      img->currentSlice->partArr[i].readSyntaxElement = readSyntaxElement_CABAC;
    }
  }
}

---

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