#ifdef DEBUG_SUMMARY
static const char *desc_name1[] = {
/* 00 */  0,
/* 01 */  0,
/* 02 */  "video_stream_descr",
/* 03 */  "audio_stream_descr",
/* 04 */  "hierarchy_descr",
/* 05 */  "registration_descr",
/* 06 */  "data_stream_align_descr",
/* 07 */  "target_background_grid_descr",
/* 08 */  "video_window_descr",
/* 09 */  "CA_descr",
/* 0a */  "ISO_639_lang_descr",
/* 0b */  "syst_clk_descr",
/* 0c */  "multiplex_buf_utilization_descr",
/* 0d */  "copyright_descr",
/* 0e */  "max_bitrate_descr",
/* 0f */  "private_data_indicator_descr",
/* 10 */  "smoothing_buf_descr",
/* 11 */  "STD_descr",
/* 12 */  "IBP_descr",
/* 13 */ 0,
/* 14 */ "assoc_tag_descr",
};

static const char *desc_name2[] = {
/* 80 */  "stuffing_descr",
/* 81 */ 0, 0, 0, 0, 0, /* - 85 */
/* 86 */ "caption_serv_descr",
/* 87 */ "content_advisory_descr",
/* 88 */ 0, 0, 0, 0, 0, 0, 0, 0, /* - 8f */
/* 90 */ 0, 0, 0, 0, 0, 0, 0, 0, /* - 97 */
/* 98 */ 0, 0, 0, 0, 0, 0, 0, 0, /* - 9f */
/* a0 */ "extended_ch_name_descr",
/* a1 */ "serv_location_descr",
/* a2 */ "time_shifted_serv_descr",
/* a3 */ "component_name_descr",
/* a4 */ "data_service_descr",
/* a5 */ "PID_count_descr",
/* a6 */ "Download_descr",
/* a7 */ "multiprotocol_encapsulate_descr",
/* a8 */ "DCC_departing_event_descr",
/* a9 */ "DCC_arriving_event_descr",
/* aa */ "Content_Protect_Copy_Mngt_descr",
/* ab */ 0, 0, 0, 0, 0, 0, 0, 0, 0, /* - b3 */
/* b4 */ "Module_Link_descr",
/* b5 */ "CRC32_descr",
/* b6 */ 0, 0, /* - b7 */
/* b8 */ "Group_Link_descr",
};

/* print descr tag info */

static uint32_t prt_descr(uint8_t *descr)
{
  int i, n;
  uint8_t *bp, *cp;
  const char *nm = 0;
  uint32_t tag = descr[0];
  int len = descr[1];

  printf("    tag/len=0x%02x/%u (", tag,len);
  if( tag < lengthof(desc_name1) )
    nm = desc_name1[tag];
  else if( (n=tag-0x80) >= 0 && n<=lengthof(desc_name2) )
    nm = desc_name2[n];
  if( nm == 0 ) nm = "n/a";
  printf("%s)\n",nm);

  bp = cp = &descr[2];
  for( i=0; i<len; ) {
    if( (i&0x0f) == 0 ) printf("%04x: ",i);
    printf("%02x ", *bp++);
    if( (++i & 0x0f) == 0 ) {
      printf("  | ");
      while( cp < bp ) {
        printf("%c", *cp>=0x20 && *cp<0x80 ? *cp : '.');
        ++cp;
      }
      printf("\n");
    }
  }
  if( (i&0x0f) != 0 ) {
    while( (i++ & 0xf) ) printf("   ");
    printf("  | ");
    while( cp < bp ) {
      printf("%c", *cp>=0x20 && *cp<0x80 ? *cp : '.');
      ++cp;
    }
    printf("\n");
  }
  switch ( tag ) {
  case 0xa1:       /* serv_location_descr */
    n = (descr[2]<<8) | descr[3];
    printf("            pcr_pid=0x%04x\n",n);
    n  = descr[4];
    bp = &descr[5];
    cp = &descr[len+2];
    for( i=0; i<n && bp+6<=cp; ++i ) {
      uint32_t st = bp[0];
      printf("         %2d.", i);
      printf(" stream=0x%02x", st);
      printf(" (%s)", ( (st==0x02) ? "video" :
                       ((st==0x81) ? "AC3-audio" :
                       ((st==0x03) ? "MPEG1-audio" :
                       ((st==0x04) ? "MPEG1-audio" :
                          "n/a"))) ));
      printf(" pid=0x%04x", (bp[1]<<8) | bp[2]);
      printf(" lang_code=%c", bp[3]);
      printf("%c", bp[4]>=0x20 && bp[4]<0x80 ? bp[4] : '.');
      printf("%c", bp[5]>=0x20 && bp[5]<0x80 ? bp[5] : '.');
      printf("\n");
      bp += 6;
    }
  }
  return len+2;
}

/* print the list of descr info */

static void prt_all_descr(uint8_t *descr,int len)
{
  while ( len > 0 ) {
    int n = prt_descr(descr);
    descr += n;
    len -= n;
  }
}

static void prt_vct(zvct_t *vct)
{
  printf("VCT table -");
  printf(" ver=0x%04x", vct->version_number);
  printf(" items=0x%04x", vct->items);
  printf(" ts_stream_id=0x%04x\n", vct->transport_stream_id);
  prt_all_descr(vct->descr, vct->descr_length);
  for( int i=0; i<vct->items; ++i ) {
    zvitem_t *item = vct->vct_tbl[i];
    printf(" %2d. name= ", i);
    for( int j=0; j<7; ++j ) {
      int ch = item->short_name[j];
      printf("%c", ch>=0x20 && ch<0x80 ? ch : '.');
    }
    printf(" maj =0x%04x", item->major_channel_number);
    printf(" min =0x%04x", item->minor_channel_number);
    printf(" mod =0x%04x", item->modulation_mode     );
    printf(" freq=0x%04x", item->carrier_frequency   );
    printf(" TSid=0x%04x", item->channel_TSID        );
    printf(" prog=0x%04x", item->program_number      );
    printf(" etm =0x%04x", item->etm_location        );
    printf(" acc =0x%04x", item->access_controlled   );
    printf(" hide=0x%04x", item->hidden              );
    printf(" serv=0x%04x", item->service_type        );
    printf(" s_id=0x%04x", item->source_id           );
    printf(" pcr =0x%04x", item->pcr_pid             );
    for( int k=0; k<item->num_ch_elts; ++k ) {
      printf("         %2d.", k);
      printf(" stream=0x%04x",item->elts[k].stream_id  );
      printf(" pid=0x%04x",item->elts[k].pes_pid    );
      int ch0 = item->elts[k].code_639[0];
      int ch1 = item->elts[k].code_639[1];
      int ch2 = item->elts[k].code_639[2];
      printf(" lang_code=%c",ch0>=0x20 && ch0<0x80 ? ch0 : '.');
      printf("%c",ch1>=0x20 && ch1<0x80 ? ch1 : '.');
      printf("%c",ch2>=0x20 && ch2<0x80 ? ch2 : '.');
    }
    printf(" descr_len=0x%04x\n", item->descr_length );
    prt_all_descr(item->descr, item->descr_length);
  }
}

static void prt_mgt(zmgt_t *mgt)
{
  printf("\nMGT table -");
  printf(" items=0x%x", mgt->items);
  printf(" descr_len=0x%x\n", mgt->descr_len);
  prt_all_descr(mgt->descr, mgt->descr_len);
  zmitem_t *item = mgt->mgt_tbl;
  for( int i=0; i<mgt->items; ++i,++item ) {
    printf(" %2d ", i);
    printf(" typ=0x%x", item->type);
    printf(" pid=0x%x", item->pid);
    printf(" ver=0x%x", item->version);
    printf(" size=0x%x", item->size);
    printf(" descr_len=0x%x\n", item->descr_len);
    prt_all_descr(item->descr, item->descr_len);
  }
}

#else
#define prt_vct(s) do {} while(0)
#define prt_mgt(s) do {} while(0)
#endif