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: descriptor.c,v 1.23 2004/02/07 01:28:01 rasc Exp $


 DVBSNOOP

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

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


 -- Descriptor Section



$Log: descriptor.c,v $
Revision 1.23  2004/02/07 01:28:01  rasc
MHP Application  Information Table
some AIT descriptors

Revision 1.22  2004/01/25 21:37:27  rasc
bugfixes, minor changes & enhancments

Revision 1.21  2004/01/12 23:05:24  rasc
no message

Revision 1.20  2004/01/11 21:01:31  rasc
PES stream directory, PES restructured

Revision 1.19  2004/01/03 00:30:06  rasc
DSM-CC  STREAM descriptors module (started)

Revision 1.18  2004/01/02 22:59:58  rasc
DSM-CC  modules renaming...

Revision 1.17  2004/01/02 22:25:35  rasc
DSM-CC  MODULEs descriptors complete

Revision 1.16  2004/01/02 16:40:34  rasc
DSM-CC  INT/UNT descriptors complete
minor changes and fixes

Revision 1.15  2004/01/01 20:31:22  rasc
PES program stream map, minor descriptor cleanup

Revision 1.14  2004/01/01 20:09:19  rasc
DSM-CC INT/UNT descriptors
PES-sync changed, TS sync changed,
descriptor scope
other changes

Revision 1.13  2003/12/29 22:14:53  rasc
more dsm-cc INT UNT descriptors

Revision 1.12  2003/10/24 22:45:04  rasc
code reorg...

Revision 1.11  2003/10/24 22:17:14  rasc
code reorg...

Revision 1.10  2003/10/13 23:27:35  rasc
Bugfix, verbose < 4 segfaulted, tnx to 'mws'  for reporting.

Revision 1.9  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?

Revision 1.8  2003/06/24 23:51:03  rasc
bugfixes and enhancements

Revision 1.7  2003/05/03 02:51:08  obi
skip descriptors with length == 0

Revision 1.6  2003/03/17 16:15:11  obi
fixed infinite loop
thanks to Johannes Stezenbach

Revision 1.5  2002/09/29 13:01:35  wjoost
kleiner Fehler



*/


#include "dvbsnoop.h"
#include "descriptor.h"
#include "mpeg_descriptor.h"
#include "dvb_descriptor.h"
#include "dsmcc_carousel_descriptor.h"
#include "dsmcc_int_unt_descriptor.h"
#include "mhp_ait_descriptor.h"
#include "misc/hexprint.h"
#include "misc/output.h"







/*
  determine descriptor type and print it...
  return byte length
*/

int  descriptor  (u_char *b, DTAG_SCOPE scope)

{
 int len;
 int id;


  id  =  (int)b[0];  
  len = ((int)b[1]) + 2;

  // nothing to print here? 
  // well, I guess all descriptors need a verbosity >=4...
  if (getVerboseLevel() < 4) return len;

  indent (+1);


  switch  (scope) {

     case DSMCC_STREAM:
  		descriptorMPEG (b); 
		break;

     case DSMCC_CAROUSEL:
  		descriptorDSMCC_CAROUSEL (b);
		break;

     case DSMCC_INT_UNT:
  		if (id < 0x40)	descriptorDSMCC_INT_UNT (b);
		else 		descriptorDVB (b);
		break;

     case MHP_AIT:
		descriptorMHP_AIT (b);
		break;

     case MPEG:
     case DVB_SI:
     default:
  		if (id < 0x40)	descriptorMPEG (b);
		else	 	descriptorDVB (b);
		break;

  }


  indent (-1);

  return len;   // (descriptor total length)
}








/*
  Any  descriptor  (Basic Descriptor output)
  ETSI 300 468 // ISO 13818-1
*/

void descriptor_any (u_char *b)

{
 int  len;


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

 print_databytes (4,"Descriptor-data:", b+2, len);
}