epgdump/cdt.c

   1 // -*- tab-width:4 -*-
   2
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <string.h>
   6
   7 #include "cdt.h"
   8 #include "ts_ctl.h"
   9 #include "clt2png.h"
  10
  11 int parseCDThead(unsigned char *data, CDThead *h) {
  12         int boff = 0;
  13
  14         memset(h, 0, sizeof(CDThead));
  15
  16         h->table_id = getBit(data, &boff, 8);
  17         h->section_syntax_indicator = getBit(data, &boff, 1);
  18         h->reserved_future_use1 = getBit(data, &boff, 1);
  19         h->reserved1 = getBit(data, &boff, 2);
  20         h->section_length = getBit(data, &boff, 12);
  21         h->download_data_id = getBit(data, &boff, 16);
  22         h->reserved2 = getBit(data, &boff, 2);
  23         h->version_number = getBit(data, &boff, 5);
  24         h->current_next_indicator = getBit(data, &boff, 1);
  25         h->section_number = getBit(data, &boff, 8);
  26         h->last_section_number = getBit(data, &boff, 8);
  27         h->original_network_id = getBit(data, &boff, 16);
  28         h->data_type = getBit(data, &boff, 8);
  29         h->reserved_future_use2 = getBit(data, &boff, 4);
  30         h->descriptors_loop_length = getBit(data, &boff, 12);
  31
  32         return 13;
  33 }
  34
  35 int parseCDTdesc(unsigned char *data, CDTdesc *desc) {
  36 // ほとんど呼ばれることはない
  37         int boff = 0;
  38
  39         memset(desc, 0, sizeof(CDTdesc));
  40
  41         desc->descriptor_tag = getBit(data, &boff, 8);
  42         desc->descriptor_length = getBit(data, &boff, 8);
  43
  44         return desc->descriptor_length + 2;
  45 }
  46
  47 int parseCDTdata(unsigned char *data, CDTdata *cdtd) {
  48         int boff = 0;
  49
  50         memset(cdtd, 0, sizeof(CDTdata));
  51
  52         cdtd->logo_type = getBit(data, &boff, 8);
  53         cdtd->reserved_future_use1 = getBit(data, &boff, 7);
  54         cdtd->logo_id = getBit(data, &boff, 9);
  55         cdtd->reserved_future_use2 = getBit(data, &boff, 4);
  56         cdtd->logo_version = getBit(data, &boff, 12);
  57         cdtd->data_size = getBit(data, &boff, 16);
  58         cdtd->data = calloc(1, cdtd->data_size);
  59         memcpy(cdtd->data, data + boff / 8, cdtd->data_size);
  60         //boff += cdtd->data_size * 8;
  61
  62         return cdtd->data_size + 7;
  63 }
  64
  65 void dumpCDT(unsigned char *ptr, STATION *station, int station_count)
  66 {
  67         CDThead  cdth;
  68         CDTdesc  desc;
  69         CDTdata  cdtd;
  70         LOGO * pLogo;
  71
  72         int len = 0;
  73         int loop_len = 0;
  74         int desc_len = 0;
  75         int i = 0;
  76
  77         /* CDT */
  78         len = parseCDThead(ptr, &cdth);
  79         ptr += len;
  80         loop_len = cdth.section_length - (len - 3 + 4); // 3は共通ヘッダ長 4はCRC
  81
  82         desc_len = cdth.descriptors_loop_length;
  83         while(desc_len > 0) {
  84                 len = parseCDTdesc(ptr, &desc);
  85                 ptr += len;
  86                 desc_len -= len;
  87         }
  88
  89         while(loop_len > 0) {
  90                 /*
  91                 logo_type
  92                 0x00 24x48 864  SD4:3 スモール
  93                 0x01 24x36 648  SD16:9 スモール
  94                 0x02 27x48 972  HD スモール
  95                 0x03 36x72 1296 SD4:3 ラージ
  96                 0x04 36x54 972  SD16:9 ラージ
  97                 0x05 36x64 1152 HD ラージ
  98                 */
  99                 len = parseCDTdata(ptr, &cdtd);
 100                 ptr += len;
 101                 loop_len -= len;
 102 /*
 103                 char fname[16];
 104                 sprintf(fname,"%d_%d.png",cdth.download_data_id,cdtd.logo_type);
 105                 FILE* png = fopen(fname,"wb");
 106                 void* mem_png = NULL;
 107                 int size_png;
 108                 clt2png(cdtd.data,&mem_png, &size_png);
 109                 fwrite(mem_png, 1, size_png, png);
 110                 fclose(png);
 111 */
 112 #if 0
 113                 printf("CDT=(%d:%d:%d:%d:%d:%dbyte:desc%dbyte)%d,%d,%d,%d\n",
 114                         cdth.table_id, cdth.download_data_id, cdth.version_number,
 115                         cdth.original_network_id, cdth.data_type,
 116                         cdth.section_length, cdth.descriptors_loop_length,
 117
 118                         cdtd.logo_type, cdtd.logo_id, cdtd.logo_version,
 119                         cdtd.data_size);
 120 #endif
 121                 for ( i = 0; i < station_count; i++ ) {
 122                         pLogo = &station[i].logo_array[cdtd.logo_type];
 123                         if ( station[i].logo_download_data_id == cdth.download_data_id ) {
 124                                 pLogo->logo = NULL;
 125                                 clt2png(cdtd.data, &pLogo->logo, &pLogo->logo_size);
 126                         }
 127                 }
 128         }
 129         return;
 130 }
 131