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src/Source/LibOpenJPEG/tpix_manager.c  view on Meta::CPAN

                        opj_codestream_info_t cstr_info, 
                        int j2klen, 
                        opj_stream_private_t *cio,
                        opj_event_mgr_t * p_manager )
{
  OPJ_UINT32 len;
  OPJ_OFF_T lenp;
  OPJ_UINT32 i, j;
  OPJ_UINT32 Aux;
  OPJ_UINT32 num_max_tile_parts;
  OPJ_UINT32 size_of_coding; /* 4 or 8 */
  opj_tp_info_t tp;
  OPJ_BYTE l_data_header [8];
  OPJ_UINT32 version;

  num_max_tile_parts = (OPJ_UINT32)get_num_max_tile_parts( cstr_info);

  if( j2klen > pow( 2, 32)){
    size_of_coding =  8;
    version = num_max_tile_parts == 1 ? 1:3;
  }
  else{
    size_of_coding = 4;
    version = num_max_tile_parts == 1 ? 0:2;
  }

  lenp = opj_stream_tell(cio);
  opj_stream_skip(cio, 4, p_manager);         /* L [at the end]      */
  opj_write_bytes(l_data_header,JPIP_FAIX,4); /* FAIX */
  opj_stream_write_data(cio,l_data_header,4,p_manager);
  opj_write_bytes(l_data_header,version,1);   /* Version 0 = 4 bytes */
  opj_stream_write_data(cio,l_data_header,1,p_manager);

  opj_write_bytes(l_data_header,num_max_tile_parts,size_of_coding);         /* NMAX           */
  opj_stream_write_data(cio,l_data_header,size_of_coding,p_manager);
  opj_write_bytes(l_data_header,(OPJ_UINT32)(cstr_info.tw*cstr_info.th),size_of_coding);  /* M              */
  opj_stream_write_data(cio,l_data_header,size_of_coding,p_manager);

  for (i = 0; i < (OPJ_UINT32)(cstr_info.tw*cstr_info.th); i++)
    {
    for (j = 0; j < (OPJ_UINT32)cstr_info.tile[i].num_tps; j++)
      {
      tp = cstr_info.tile[i].tp[j];

      opj_write_bytes(l_data_header,(OPJ_UINT32)(tp.tp_start_pos-coff),size_of_coding);            /* start position */
      opj_stream_write_data(cio,l_data_header,size_of_coding,p_manager);
      opj_write_bytes(l_data_header,(OPJ_UINT32)(tp.tp_end_pos-tp.tp_start_pos+1),size_of_coding); /* length         */
      opj_stream_write_data(cio,l_data_header,size_of_coding,p_manager);

      if (version & 0x02)
        {
        if( cstr_info.tile[i].num_tps == 1 && cstr_info.numdecompos[compno] > 1)
          Aux = (OPJ_UINT32)(cstr_info.numdecompos[compno] + 1);
        else
          Aux = j + 1;

        opj_write_bytes(l_data_header,Aux,4);
        opj_stream_write_data(cio,l_data_header,4,p_manager);

        /*cio_write(img.tile[i].tile_parts[j].num_reso_AUX,4);*/ /* Aux_i,j : Auxiliary value */
        /* fprintf(stderr,"AUX value %d\n",Aux);*/
        }
      /*cio_write(0,4);*/
      }
    /* PADDING */
    while (j < num_max_tile_parts)
      {

          opj_write_bytes(l_data_header,0,size_of_coding);/* start position            */
      opj_stream_write_data(cio,l_data_header,size_of_coding,p_manager);
      opj_write_bytes(l_data_header,0,size_of_coding);/* length                    */
      opj_stream_write_data(cio,l_data_header,size_of_coding,p_manager);

      if (version & 0x02)
      opj_write_bytes(l_data_header,0,4);      /* Aux_i,j : Auxiliary value */
      opj_stream_write_data(cio,l_data_header,4,p_manager);
      j++;
      }
    }
  
  len = (OPJ_UINT32)(opj_stream_tell(cio)-lenp);
  opj_stream_seek(cio, lenp,p_manager);
  opj_write_bytes(l_data_header,len,4);/* L  */
  opj_stream_write_data(cio,l_data_header,4,p_manager);
  opj_stream_seek(cio, lenp+len,p_manager);

  return (int)len;
}

int get_num_max_tile_parts( opj_codestream_info_t cstr_info)
{
  int num_max_tp = 0, i;

  for( i=0; i<cstr_info.tw*cstr_info.th; i++)
    num_max_tp = MAX( cstr_info.tile[i].num_tps, num_max_tp);
  
  return num_max_tp;
}