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.

/*
$Id: dvb_descriptor.c,v 1.29 2004/02/10 22:57:54 rasc Exp $ 


 DVBSNOOP

 a dvb sniffer  and mpeg2 stream analyzer tool
 http://dvbsnoop.sourceforge.net/

 (c) 2001-2004   [e-mail] (rasc)



 -- DVB Descriptors  ETSI 300 468
 -- EN/ISO/TR document references in comments may habe been changed
 -- during updates of documents by ETSI.



$Log: dvb_descriptor.c,v $
Revision 1.29  2004/02/10 22:57:54  rasc
MHP descriptor, missing DVB descriptor done

Revision 1.28  2004/02/09 22:56:59  rasc
Bugfix VBI Data descriptor

Revision 1.27  2004/02/09 21:24:57  rasc
AIT descriptors
minor redesign on output routines

Revision 1.26  2004/01/02 16:40:34  rasc
DSM-CC  INT/UNT descriptors complete
minor changes and fixes

Revision 1.25  2004/01/01 20:35:26  rasc
PES program stream map, minor descriptor cleanup

Revision 1.24  2004/01/01 20:31:22  rasc
PES program stream map, minor descriptor cleanup

Revision 1.23  2004/01/01 20:09:19  rasc
DSM-CC INT/UNT descriptors
PES-sync changed, TS sync changed,
descriptor scope
other changes

Revision 1.22  2003/12/27 22:02:43  rasc
dsmcc INT UNT descriptors started

Revision 1.21  2003/12/27 14:35:00  rasc
dvb-t descriptors
DSM-CC: SSU Linkage/DataBroadcast descriptors

Revision 1.20  2003/12/26 23:27:39  rasc
DSM-CC  UNT section

Revision 1.19  2003/11/26 23:54:47  rasc
-- bugfixes on Linkage descriptor

Revision 1.18  2003/11/26 16:27:45  rasc
- mpeg4 descriptors
- simplified bit decoding and output function

Revision 1.17  2003/11/24 23:52:16  rasc
-sync option, some TS and PES stuff;
dsm_addr inactive, may be wrong - due to missing ISO 13818-6

Revision 1.16  2003/11/09 20:48:34  rasc
pes data packet (DSM-CC)

Revision 1.15  2003/11/07 16:33:32  rasc
no message

Revision 1.14  2003/11/01 21:40:27  rasc
some broadcast/linkage descriptor stuff

Revision 1.13  2003/10/29 20:54:56  rasc
more PES stuff, DSM descriptors, testdata

Revision 1.12  2003/10/26 21:36:19  rasc
private DSM-CC descriptor Tags started,
INT-Section completed..

Revision 1.11  2003/10/26 19:06:27  rasc
no message

Revision 1.10  2003/10/25 19:11:49  rasc
no message

Revision 1.9  2003/10/24 22:45:04  rasc
code reorg...

Revision 1.8  2003/10/24 22:17:17  rasc
code reorg...

Revision 1.7  2003/10/21 21:31:29  rasc
no message

Revision 1.6  2003/10/21 19:54:43  rasc
no message

Revision 1.5  2003/10/19 22:31:38  rasc
- some datacarousell stuff started

Revision 1.4  2003/10/19 22:22:57  rasc
- some datacarousell stuff started

Revision 1.3  2003/10/19 21:05:53  rasc
- some datacarousell stuff started

Revision 1.2  2003/10/16 19:02:28  rasc
some updates to dvbsnoop...
- small bugfixes
- tables updates from ETR 162

Revision 1.1  2003/07/08 19:59:50  rasc
restructuring... some new, some fixes,
trying to include DSM-CC, Well someone a ISO13818-6 and latest version of ISO 18313-1 to spare?



*/


#include "dvbsnoop.h"
#include "descriptor.h"
#include "dvb_descriptor.h"
#include "strings/dvb_str.h"
#include "strings/dsmcc_str.h"
#include "misc/hexprint.h"
#include "misc/output.h"






/*
  determine descriptor type and print it...

  EN 300 468:
  descriptor_tag: The descriptor tag is an 8-bit field which identifies
  each descriptor. Those values with MPEG-2 normative meaning are described
  in ISO/IEC 13818-1 [1].

  return byte length
*/

int  descriptorDVB  (u_char *b)

{
 int len;
 int id;


  id  =  (int) b[0];
      
  len = ((int) b[1]) + 2;
  out_NL (4);
  out_S2B_NL (4,"DVB-DescriptorTag: ",id, dvbstrDVBDescriptorTAG(id));
  out_SB_NL  (5,"Descriptor_length: ",b[1]);

  // empty ??
  len = ((int)b[1]) + 2;
  if (b[1] == 0)
	 return len;

  // print hex buf of descriptor
  printhex_buf (9, b,len);
  
  switch (b[0]) 
  {    	     
     case 0x40:  descriptorDVB_NetName (b);  break;
     case 0x41:  descriptorDVB_ServList (b);  break;
                              
     case 0x42:  descriptorDVB_Stuffing (b);  break;                    
     case 0x43:  descriptorDVB_SatDelivSys (b);  break;
     
     case 0x44:  descriptorDVB_CableDelivSys (b);  break;
     case 0x45:  descriptorDVB_VBI_Data (b);  break;               
     case 0x46:  descriptorDVB_VBI_Teletext (b);  break;                    
     case 0x47:  descriptorDVB_BouquetName (b);  break;
               
     case 0x48:  descriptorDVB_Service (b);  break;
     
     case 0x49:  descriptorDVB_CountryAvail (b);  break;
     case 0x4A:  descriptorDVB_Linkage (b);  break;
     case 0x4B:  descriptorDVB_NVOD_Reference (b);  break;
     case 0x4C:  descriptorDVB_TimeShiftedService (b);  break;
     case 0x4D:  descriptorDVB_ShortEvent (b);  break;
     case 0x4E:  descriptorDVB_ExtendedEvent (b);  break;
     case 0x4F:  descriptorDVB_TimeShiftedEvent(b);  break;
     case 0x50:  descriptorDVB_Component(b);  break;
     case 0x51:  descriptorDVB_Mosaic(b);  break;
     case 0x52:  descriptorDVB_StreamIdent (b);  break;
     case 0x53:  descriptorDVB_CAIdentifier (b);  break;
     case 0x54:  descriptorDVB_Content (b);  break;
     case 0x55:  descriptorDVB_ParentalRating(b);  break;
     case 0x56:  descriptorDVB_Teletext (b);  break;
     case 0x57:  descriptorDVB_Telephone (b);  break;
     case 0x58:  descriptorDVB_LocalTimeOffset (b);  break;
     case 0x59:  descriptorDVB_Subtitling (b);  break;
     case 0x5A:  descriptorDVB_TerrestDelivSys (b);  break;
     case 0x5B:  descriptorDVB_MultilingNetworkName (b);  break;
     case 0x5C:  descriptorDVB_MultilingBouquetName (b);  break;
     case 0x5D:  descriptorDVB_MultilingServiceName (b);  break;
     case 0x5E:  descriptorDVB_MultilingComponent (b);  break;
     case 0x5F:  descriptorDVB_PrivateDataSpecifier (b);  break;
     case 0x60:  descriptorDVB_ServiceMove (b);  break;
     case 0x61:  descriptorDVB_ShortSmoothingBuffer (b);  break;
     case 0x62:  descriptorDVB_FrequencyList (b);  break;
     case 0x63:  descriptorDVB_PartialTransportStream(b);  break;
     case 0x64:  descriptorDVB_DataBroadcast(b);  break;
     case 0x65:  descriptorDVB_CASystem(b);  break;    /* $$$ reserved now ?? */
     case 0x66:  descriptorDVB_DataBroadcastID(b);  break;
     case 0x67:  descriptorDVB_TransportStream(b);  break;
     case 0x68:  descriptorDVB_DSNG(b);  break;
     case 0x69:  descriptorDVB_PDC(b);  break;
     case 0x6A:  descriptorDVB_AC3(b);  break;
     case 0x6B:  descriptorDVB_AncillaryData(b);  break;
     case 0x6C:  descriptorDVB_CellList(b);  break;
     case 0x6D:  descriptorDVB_CellFrequencyLink(b);  break;
     case 0x6E:  descriptorDVB_AnnouncementSupport(b);  break;
     case 0x6F:  descriptorDVB_ApplicationSignalling(b);  break;
     case 0x70:  descriptorDVB_AdaptionFieldData(b);  break;
     case 0x71:  descriptorDVB_ServiceIdentifier(b);  break;
     case 0x72:  descriptorDVB_ServiceAvailability(b);  break;


     default: 
	if (b[0] < 0x80) {
	    out_nl (0,"  ----> ERROR: unimplemented descriptor (dvb context), Report!");
	}
	descriptor_any (b);
	break;
  } 


  return len;   // (descriptor total length)
}











/* --------------------------------------------------------------- 
  well known DVB descriptors
   --------------------------------------------------------------- */



/*
  0x40 NetName  descriptor  (network name descriptor)
*/

void descriptorDVB_NetName (u_char *b)

{
 /* ETSI 300 468 */

  int  len;

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

  print_text_468A (4, "Network_name: ", b+2,len);
}




/*
  0x41 Service List Descriptor 
*/

void descriptorDVB_ServList (u_char *b)

{
 /* ETSI 300 468  6.2.xx */

 typedef struct  _descServList {
    u_int      descriptor_tag;
    u_int      descriptor_length;		

    // N ... Service ID & Types

 } descServList;


 typedef struct _descServList2 {
    u_int      service_id;
    u_int      service_type;
 } descServList2;


 descServList  d;
 descServList2 d2;
 int           len;



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


 len = d.descriptor_length - 2;
 b += 2;

 indent (+1);
 while (len > 0) {
   d2.service_id 		= getBits (b, 0, 0, 16);
   d2.service_type 		= getBits (b, 0, 16, 8);
   b   += 3;
   len -= 3;
   

    out_S2W_NL (4,"Service_ID: ",d2.service_id,
	   " --> refers to PMS program_number");
    out_S2B_NL (4,"Service_type: ",d2.service_type,
	   dvbstrService_TYPE(d2.service_type));
    out_NL (4);

 }
 indent (-1);


}





/*
  0x42  Stuffing descriptor 
  ETSI EN 300 468  
*/

void descriptorDVB_Stuffing (u_char *b)

{
  descriptor_any (b);
}





/*
  0x43 SatDelivSys  descriptor  (Satellite delivery system descriptor)
*/

void descriptorDVB_SatDelivSys (u_char *b)

{
 /* ETSI 300 468    6.2.xx */

 typedef struct  _descSDS {
    u_int      descriptor_tag;
    u_int      descriptor_length;		

    u_long     frequency;
    u_int      orbital_position;
    u_int      west_east_flag;
    u_int      polarisation;
    u_int      modulation;
    u_long     symbol_rate;
    u_int      FEC_inner;

 } descSDS;

 descSDS  d;
 //int      i;




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


 d.frequency			 = getBits (b, 0, 16, 32);
 d.orbital_position		 = getBits (b, 0, 48, 16);
 d.west_east_flag		 = getBits (b, 0, 64, 1);
 d.polarisation			 = getBits (b, 0, 65, 2);
 d.modulation			 = getBits (b, 0, 67, 5);
 d.symbol_rate			 = getBits (b, 0, 72, 28);
 d.FEC_inner			 = getBits (b, 0, 100, 4);


 out_nl (4,"Frequency: %lu (= %3lx.%05lx GHz)",d.frequency,
	 d.frequency >> 20, d.frequency & 0x000FFFFF );
 out_nl (4,"Orbital_position: %u (= %3x.%01x)",d.orbital_position,
	 d.orbital_position >> 4, d.orbital_position & 0x000F);

 out_S2B_NL (4,"West_East_flag: ",d.west_east_flag,
	 dvbstrWEST_EAST_FLAG(d.west_east_flag));

 out_S2B_NL (4,"Polarisation: ",d.polarisation,
	 dvbstrPolarisation_FLAG(d.polarisation));

 out_S2B_NL (4,"Modulation (Sat): ",d.modulation,
	 dvbstrModulationSAT_FLAG(d.modulation));

 out_nl (4,"Symbol_rate: %u (= %3x.%04x)",d.symbol_rate,
	 d.symbol_rate >> 16, d.symbol_rate & 0x0000FFFF );

 out_S2B_NL (4,"FEC_inner: ",d.FEC_inner,
	 dvbstrFECinner_SCHEME (d.FEC_inner));


}





/*
  0x44 CableDelivSys  descriptor  (Cable delivery system descriptor)
*/

void descriptorDVB_CableDelivSys (u_char *b)

{
 /* ETSI 300 468    6.2.xx */

 typedef struct  _descCDS {
    u_int      descriptor_tag;
    u_int      descriptor_length;		

    u_long     frequency;
    u_int      FEC_outer;
    u_int      reserved_1;
    u_int      modulation;
    u_long     symbol_rate;
    u_int      FEC_inner;

 } descCDS;

 descCDS  d;
 //int      i;




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


 d.frequency			 = getBits (b, 0, 16, 32);
 d.reserved_1			 = getBits (b, 0, 48, 12);
 d.FEC_outer			 = getBits (b, 0, 60, 4);
 d.modulation			 = getBits (b, 0, 64, 8);
 d.symbol_rate			 = getBits (b, 0, 72, 28);
 d.FEC_inner			 = getBits (b, 0, 100, 4);


 out_nl (4,"Frequency: %lu (= %3lx.%05lx MHz)",d.frequency,
	 d.frequency >> 16, d.frequency & 0x0000FFFF );

 out_S2B_NL (4,"FEC_outer: ",d.FEC_outer,
	 dvbstrFECouter_SCHEME (d.FEC_outer));

 out_SB_NL (6,"reserved_1: ",d.reserved_1);


 out_S2B_NL (4,"Modulation (Cable): ",d.modulation,
	 dvbstrModulationCable_FLAG(d.modulation));

 out_nl (4,"  Symbol_rate: %u (= %4x.%04x)",d.symbol_rate,
	 d.symbol_rate >> 16, d.symbol_rate & 0x0000FFFF );

 out_S2B_NL (4,"FEC_inner: ",d.FEC_inner,
	 dvbstrFECinner_SCHEME (d.FEC_inner));

}






/*
  0x45  VBI Data  descriptor 
  ETSI EN 300 468  2.2.42
*/

void descriptorDVB_VBI_Data  (u_char *b)

{
 int           len1;


 // dtag	 = b[0];
 len1       	 = b[1];
 b += 2;


 indent (+1);
 while (len1 > 0) {
	int  ds_id;
	int  len2;

    	out_NL (4); 
	ds_id =	outBit_S2x_NL (4,"Data_service_id: ",			b,  0,  8,
			(char *(*)(u_long)) dvbstrDataService_ID);
	len2 = outBit_Sx_NL   (4,"Data_service_descriptor_length: ",	b,  8,  8);

	b    += 2;
	len1 -= 2;

	if ((ds_id >= 1 && ds_id <= 7) && (ds_id != 3) ) {

		indent (+1);
		while (len2 > 0) {
           		out_NL (4);
			outBit_Sx_NL   (6,"reserved_1: ",	b,  0,  2);
			outBit_Sx_NL   (4,"field_parity: ",	b,  2,  1);
			outBit_Sx_NL   (4,"line_offset: ",	b,  3,  5);

			b++;
	   		len2--;
			len1--;
		} 
		indent (-1);

	} else {

		print_databytes (6,"Reserved Data:", b,len2);
		b += len2;
		len1 -= len2;


	}

 }
 indent (-1);


}






/*
  0x46  VBI teletext descriptor 
  ETSI EN 300 468   6.2.xx
*/

void descriptorDVB_VBI_Teletext (u_char *b)

{
  descriptorDVB_Teletext (b);
}






/*
  0x47  Bouquet Name  descriptor 
  ETSI EN 300 468    6.2.xx
*/

void descriptorDVB_BouquetName  (u_char *b)

{
  int len;

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

  print_text_468A (4, "BouquetName: ", b+2,len);
}







/*
  0x48  Service  descriptor 
  ETSI EN 300 468   6.2.xx
*/

void descriptorDVB_Service  (u_char *b)

{

 typedef struct  _descService 
 {
    u_int      descriptor_tag;
    u_int      descriptor_length;
                    
    u_int      service_type;
    u_int      service_provider_name_length;

    // N   char 
    // char   *service_provider_name;

    u_int      service_name_length;

    // N2  char
    // char   *service_name;

 } descService;


 descService d;



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

 d.service_type			 = getBits (b, 0, 16, 8);
 d.service_provider_name_length  = getBits (b, 0, 24, 8);


 b += 4;

 out_S2B_NL (4,"Service_type: ",d.service_type,
	dvbstrService_TYPE(d.service_type));	
 out_SB_NL (5,"Service_provider_name_length: ",d.service_provider_name_length);
     
 print_text_468A (4, "Service_provider_name: ", b,d.service_provider_name_length);