dvb_descriptor.c

DVB MPEG2 system stream 分析, 包含 各個talbe(EIT,PMT,PAT,SDT),以及video,audio. 對於學習數字電視有很大幫助.

 } descTimeShiftedEvent;


 descTimeShiftedEvent d;



 d.descriptor_tag		 = b[0];
 d.descriptor_length       	 = b[1];

 d.reference_service_id		 = getBits (b, 0, 16, 16);
 d.reference_event_id		 = getBits (b, 0, 32, 16);

 
 out_SW_NL (4,"Reference_service_id: ",d.reference_service_id);
 out_SW_NL (4,"Reference_event_id: ",d.reference_service_id);

}







/*
  0x50  Component descriptor 
  ETSI EN 300 468     6.2.xx
*/

void descriptorDVB_Component  (u_char *b)

{

 typedef struct  _descComponent {
    u_int      descriptor_tag;
    u_int      descriptor_length;		

    u_int      reserved_1;
    u_int      stream_content;
    u_int      component_type;
    u_int      component_tag;
    u_char     ISO639_2_language_code[4];

    // N2  char Text

 } descComponent;


 descComponent d;



 d.descriptor_tag		 = b[0];
 d.descriptor_length       	 = b[1];

 d.reserved_1			 = getBits (b, 0, 16, 4);
 d.stream_content		 = getBits (b, 0, 20, 4);
 d.component_type		 = getBits (b, 0, 24, 8);
 d.component_tag		 = getBits (b, 0, 32, 8);
 getISO639_3 (d.ISO639_2_language_code, b+5);	

 
 out_SB_NL (6,"reserved_1: ",d.reserved_1);
 out_SB_NL (4,"Stream_content: ",d.stream_content);
 out_SB_NL (4,"Component_type: ",d.component_type);
 out_nl    (4,"   == Content&Component: (= %s)",
      dvbstrStreamContent_Component_TYPE(
	(d.stream_content << 8) | d.component_type ) );

 out_SB_NL (4,"Component_tag: ",d.component_tag);
 out_nl    (4,"ISO639_2_language_code:  %3.3s", d.ISO639_2_language_code);

 print_text_468A (4, "Component-Description: ", b+8,d.descriptor_length - 6);

}








/*
  0x51  Mosaic  descriptor 
  ETSI EN 300 468     6.2.xx
*/

void descriptorDVB_Mosaic  (u_char *b)

{

 typedef struct  _descMosaic {
    u_int      descriptor_tag;
    u_int      descriptor_length;		

    u_int      mosaic_entry_point;
    u_int      number_of_horizontal_elementary_cells;
    u_int      reserved_1;
    u_int      number_of_vertical_elementary_cells;

    // N    desc Mosaic2

 } descMosaic;

 typedef struct  _descMosaic2 {
    u_int      logical_cell_id;
    u_int      reserved_1;
    u_int      logical_cell_presentation_info;
    u_int      elementary_cell_field_length;

    // N2   desc Mosaic3

    u_int      cell_linkage_info;
    //  conditional data !! (cell_linkage_info)
    u_int   bouquet_id;
    u_int   original_network_id;
    u_int   transport_stream_id;
    u_int   service_id;
    u_int   event_id;
 } descMosaic2;

 typedef struct  _descMosaic3 {
    u_int      reserved_1;
    u_int      elementary_cell_id;
 } descMosaic3;




 descMosaic    d;
 descMosaic2   d2;
 descMosaic3   d3;
 int           len1,len2;



 d.descriptor_tag		 = b[0];
 d.descriptor_length       	 = b[1];

 d.mosaic_entry_point                    = getBits (b, 0, 16,  1);
 d.number_of_horizontal_elementary_cells = getBits (b, 0, 17,  3);
 d.reserved_1                            = getBits (b, 0, 20,  1);
 d.number_of_vertical_elementary_cells   = getBits (b, 0, 21,  3);

 
 out_SB_NL (4,"Mosaic_entry_point: ",d.mosaic_entry_point);
 out_nl    (4,"Number_of_horizontal_elementary_cells: %u  (= %d cells)",
	d.number_of_horizontal_elementary_cells,
	d.number_of_horizontal_elementary_cells + 1);
 out_SB_NL (6,"reserved_1: ",d.reserved_1);
 out_nl    (4,"  Number_of_vertical_elementary_cells: %u  (= %d cells)",
	d.number_of_vertical_elementary_cells,
	d.number_of_vertical_elementary_cells + 1);

 len1 = d.descriptor_length - 1;
 b   += 3;

 indent(+1);
 while (len1 > 0) {

    d2.logical_cell_id                       = getBits (b, 0,  0,  6);
    d2.reserved_1                            = getBits (b, 0,  6,  7);
    d2.logical_cell_presentation_info        = getBits (b, 0, 13,  3);
    d2.elementary_cell_field_length          = getBits (b, 0, 16,  8);


    out_NL (4);
    out_SB_NL  (4,"Logical_cell_ID: ",d2.logical_cell_id);
    out_SB_NL  (6,"reserved_1: ",d2.reserved_1);
    out_S2B_NL (4,"Logical_cell_presentation_info: ",
	d2.logical_cell_presentation_info,
	dvbstrLogCellPresInfo_TYPE(d2.logical_cell_presentation_info) );
    out_SB_NL (5,"Elementary_cell_field_length: ",
	d2.elementary_cell_field_length);

    b    += 3;
    len2  = d2.elementary_cell_field_length;
    len1 -= (len2 + 3);

    indent (+1);
    while (len2 > 0) {
       d3.reserved_1                         = getBits (b, 0,  0,  2);
       d3.elementary_cell_id                 = getBits (b, 0,  2,  6);

       len2 -= 1;
       b    += 1;

       out_NL (4);	
       out_SB_NL (6,"reserved_1: ",d3.reserved_1);
       out_SB_NL (4,"Elementary_cell_ID: ",d3.elementary_cell_id);

    }  //len2
    indent (-1);


    d2.cell_linkage_info                     = getBits (b, 0,  0,  8);
    b    += 1;
    len1 -= 1;
    out_S2B_NL (4,"Cell_linkage_info: ",
		d2.cell_linkage_info,
		dvbstrCellLinkageInfo_TYPE (d2.cell_linkage_info));


    /*   conditional fields!! */

    switch (d2.cell_linkage_info) {

      case 0x01:
	d2.bouquet_id		 = getBits (b, 0, 0, 16);
	b    += 2;
	len1 -= 2;
	out_S2W_NL (4,"Bouquet_ID: ",d2.bouquet_id,dvbstrBouquetTable_ID(d2.bouquet_id));
	break;

      case 0x02:
      case 0x03:
      case 0x04:
 	d2.transport_stream_id		 = getBits (b, 0, 0, 16);
	d2.original_network_id		 = getBits (b, 0, 16, 16);
	d2.service_id			 = getBits (b, 0, 32, 16);
	b    += 6;
	len1 -= 6;

 	out_SW_NL  (4,"Transport_stream_ID: ",d2.transport_stream_id);
	out_S2W_NL (4,"Original_network_ID: ",d2.original_network_id,
	    dvbstrOriginalNetwork_ID(d2.original_network_id));
	out_S2W_NL (4,"Service_ID: ",d2.service_id,
          " --> refers to PMS program_number");


	if (d2.cell_linkage_info == 0x03)
		out_nl (4,"  --> Service referce to mosaic service");

	if (d2.cell_linkage_info == 0x04) {
		out_nl (4,"  --> Service referce to event");

 		d2.event_id	 = getBits (b, 0, 0, 16);
		b    += 2;
		len1 -= 2;
 		out_SW_NL (4,"Event_ID: ",d2.event_id);
	}

	break;

    } // switch
    

 } // while len1
 indent(-1);

}









/*
  0x52  Stream Identifier descriptor
  ETSI EN 300 468  6.2.xx

*/

void descriptorDVB_StreamIdent (u_char *b)

{

 typedef struct  _descStreamIdent {
    u_int      descriptor_tag;
    u_int      descriptor_length;		

    u_int      component_tag;		
 } descStreamIdent;


 descStreamIdent  d;



 d.descriptor_tag		 = b[0];
 d.descriptor_length       	 = b[1];

 d.component_tag		 = getBits (b,0,16,8);


 out_SB_NL (4,"Component_tag: ",d.component_tag);

}








/*
  0x53  CA Identifier  descriptor 
  ETSI EN 300 468   6.2.xx
*/

void descriptorDVB_CAIdentifier  (u_char *b)

{

 typedef struct  _descCAIdent {
    u_int      descriptor_tag;
    u_int      descriptor_length;		

    // N   CA_SysIDs

 } descCAIdent;


 descCAIdent d;
 u_int       CA_system_ID;
 int         len;



 d.descriptor_tag		 = b[0];
 d.descriptor_length       	 = b[1];

 len = d.descriptor_length; 
 b  += 2;

 indent (+1);
 while (len > 0) {

   CA_system_ID 		 = getBits (b,0,0,16);

   out_S2W_NL (4,"CA_system_ID: ",CA_system_ID,
      dvbstrCASystem_ID(CA_system_ID));

   b   += 2;
   len -= 2;
 }
 indent (-1);

}









/*
  0x54  Content  descriptor 
  ETSI EN 300 468     6.2.xx
*/

void descriptorDVB_Content  (u_char *b)

{

 typedef struct  _descContent {
    u_int      descriptor_tag;
    u_int      descriptor_length;		
 } descContent;

 typedef struct  _descContent2 {
    u_int      content_nibble_level_1;
    u_int      content_nibble_level_2;
    u_int      user_nibble_1;
    u_int      user_nibble_2;
 } descContent2;


 descContent   d;
 descContent2  d2;
 int           len;



 d.descriptor_tag		 = b[0];
 d.descriptor_length       	 = b[1];


 len = d.descriptor_length;
 b  += 2;
 
 indent (+1);
 while ( len > 0) {
    d2.content_nibble_level_1	 = getBits (b,0, 0,4);
    d2.content_nibble_level_2	 = getBits (b,0, 4,4);
    d2.user_nibble_1		 = getBits (b,0, 8,4);
    d2.user_nibble_2		 = getBits (b,0,12,4);

    b   += 2;
    len -= 2;
 
    out_SB_NL (4,"Content_nibble_level_1: ", d2.content_nibble_level_1);
    out_SB_NL (4,"Content_nibble_level_2: ", d2.content_nibble_level_2);
    out_nl    (4,"   [= %s]", dvbstrContentNibble_TYPE (
	(d2.content_nibble_level_1 << 8) | d2.content_nibble_level_2) );

    out_SB_NL (4,"User_nibble_1: ", d2.user_nibble_1);
    out_SB_NL (4,"User_nibble_2: ", d2.user_nibble_2);
    out_NL (4);
 }
 indent (-1);

}











/*
  0x55  Parental Rating  descriptor 
  ETSI EN 300 468     6.2.xx
*/

void descriptorDVB_ParentalRating (u_char *b)

{

 typedef struct  _descParentalRating {
    u_int      descriptor_tag;
    u_int      descriptor_length;		
 } descParentalRating;

 typedef struct  _descParentalRating2 {
    u_char     country_code[4];
    u_int      rating;		
 } descParentalRating2;



 descParentalRating   d;
 descParentalRating2  d2;
 int                  len;



 d.descriptor_tag		 = b[0];
 d.descriptor_length       	 = b[1];


 len = d.descriptor_length;
 b  += 2;

 indent (+1);
 while (len > 0) {
    strncpy (d2.country_code, b, 3);	
    d2.rating			 = getBits (b,0,24,8);

    b += 4;
    len -= 4;

    out_nl     (4,"Country_code:  %3.3s", d2.country_code);
    out_S2B_NL (4,"Rating:  ", d2.rating,
	dvbstrParentalRating_TYPE (d2.rating));
    out_NL (4);

 }
 indent (-1);
 
}









/*
  -- 0x56 Teletext descriptor
*/

void descriptorDVB_Teletext (u_char *b)

{
 /* ETSI EN 300 468   6.2.xx */

 typedef struct  _descTeletext {
    u_int      descriptor_tag;
    u_int      descriptor_length;		

    // N TeleTextList desc

 } descTeletext;

 typedef struct  _descTeletextList {
    u_char     ISO_639_language_code[4];
    u_int      teletext_type;
    u_int      teletext_magazine_number;
    u_int      teletext_page_number;
 } descTeletextList;


 descTeletext      d;
 descTeletextList  d2;
 int               len;



 d.descriptor_tag		 = b[0];
 d.descriptor_length       	 = b[1];

 len = d.descriptor_length;
 b  += 2;

 indent (+1);
 while ( len > 0) {
    getISO639_3 (d2.ISO_639_language_code, b);	
    d2.teletext_type		= getBits (b,0,24,5);
    d2.teletext_magazine_number	= getBits (b,0,29,3);
    d2.teletext_page_number	= getBits (b,0,32,8);

    b += 5;
    len -= 5;

    out_nl     (4,"ISO639_language_code:  %3.3s", d2.ISO_639_language_code);
    out_S2B_NL (4,"Teletext_type: ", d2.teletext_type,
	dvbstrTeletext_TYPE (d2.teletext_type));

    out_SB_NL (4,"Teletext_magazine_number: ",d2.teletext_magazine_number);
    out_SB_NL (4,"Teletext_page_number: ",d2.teletext_page_number);
    out_NL (4);
 }
 indent (-1);

}





/*
  0x57  Telephone  descriptor 
  ETSI EN 300 468     6.2.xx
*/

void descriptorDVB_Telephone  (u_char *b)

{
  u_int      country_prefix_len;
  u_int      internat_area_code_len;
  u_int      operator_code_len;
  u_int      national_area_code_len;
  u_int      core_number_len;



  // descriptor_tag		 = b[0];
  // len		       	 = b[1];

  outBit_Sx_NL (6,"reserved_1: ",		b, 16, 2);
  outBit_Sx_NL (4,"foreign_availability: ",	b, 18, 1);
  outBit_Sx_NL (4,"connection_type: ",		b, 19, 5);
  outBit_Sx_NL (6,"reserved_2: ",		b, 24, 1);

  country_prefix_len 	= outBit_Sx_NL (4,"country_prefix_length: ",	b, 25, 2);
  internat_area_code_len= outBit_Sx_NL (4,"international_area_code_length: ",	b, 27, 3);
  operator_code_len	= outBit_Sx_NL (4,"operator_code_length: ",	b, 30, 2);
  			  outBit_Sx_NL (6,"reserved_3: ",		b, 32, 1);
  national_area_code_len= outBit_Sx_NL (4,"national_area_code_length: ",b, 33, 3);
  core_number_len	= outBit_Sx_NL (4,"core_number_length: ",	b, 36, 4);
  b += 5;

  out (4,"country_prefix: "); printasciiline_buf (4, b, country_prefix_len);
  b += country_prefix_len;

  out (4,"international_area_code_prefix: "); printasciiline_buf (4, b, internat_area_code_len);
  b += internat_area_code_len;

  out (4,"operator_code: "); printasciiline_buf (4, b, operator_code_len);
  b += operator_code_len;

  out (4,"national_area_code: "); printasciiline_buf (4, b, national_area_code_len);
  b += national_area_code_len;

  out (4,"core_number: "); printasciiline_buf (4, b, core_number_len);
  b += core_number_len;

}








/*
  0x58  Local Time Offset  descriptor 
  ETSI EN 300 468     6.2.xx
*/

void descriptorDVB_LocalTimeOffset  (u_char *b)

{

 typedef struct  _descLocalTimeOffset {
    u_int      descriptor_tag;
    u_int      descriptor_length;		

    // N  Descriptor
 } descLocalTimeOffset;

 typedef struct  _descLocalTimeOffset2 {
   u_char        country_code[4];
   u_int         country_region_id;
   u_int         reserved_1;
   u_int         local_time_offset_polarity;
   u_int         local_time_offset;
   u_int         time_of_change_MJD;
   u_int         time_of_change_UTC;
   u_int         next_time_offset;
 } descLocalTimeOffset2;


 descLocalTimeOffset   d;
 descLocalTimeOffset2  d2;
 int                   len;