mpeg_descriptor.c

dvbsnoop is a DVB/MPEG stream analyzer program. The program can be used to sniff, monitor, debug, d

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

 d.association_tags_loop_length	 = getBits (b, 0, 16,  8);
 b  += 3;
 len = d.descriptor_length - 1;


 out_SW_NL (4,"Association_tags_loop_length: ",d.association_tags_loop_length);

 /* -- association tags */
 out_nl (4,"Association tag loop:");
 	indent (+1);
	for (i=0; i < d.association_tags_loop_length; ) {
 		d.association_tag	 = getBits (b, 0, i,  16);
 		out_SW_NL (4,"Association_tag: ",d.association_tag);
		i += 2;
	}
	indent (-1);
	b   += d.association_tags_loop_length;
	len -= d.association_tags_loop_length;


 d.transport_stream_id			= getBits (b, 0,  0,  16);
 d.program_number			= getBits (b, 0, 16,  16);
 d.org_network_id			= getBits (b, 0, 32,  16);
 b   += 6;
 len -= 6;

 out_SW_NL  (4,"Transport_stream_ID: ",d.transport_stream_id);
 out_SW_NL  (4,"Program_number: ",d.program_number);
 out_S2W_NL (4,"Original_network_ID: ",d.org_network_id,
	dvbstrOriginalNetwork_ID(d.org_network_id));


 print_private_data (4, b, len);

}




/*
 * ------------------------------------------------------------
 *
 * -- DSM-CC  STREAM Descriptors  ISO 13818-6
 *
 */




/*
  0x17   DSMCC  NPT-reference descriptor 
  ISO 13818-6 
*/

void descriptorMPEG_NPT_reference (u_char *b)
{
   // descriptor_tag		 = b[0];
   // descriptor_length       	 = b[1];

   outBit_S2x_NL(4,"postDiscontinuityIndicator: ",  	b,16, 1,
	   	(char *(*)(u_long)) dsmccStr_postDiscontinuityIndicator);
   outBit_Sx_NL (4,"contentId: ",		  	b,17, 7);
   outBit_Sx_NL (6,"reserved: ",		  	b,24, 7);

   outBit64_Sx  (4,"STC_Reference: ",		  	b,31,33);
   	out_nl  (4,"  [= ref/300 * 90 kHz]");
 
   outBit_Sx_NL (6,"reserved: ",		  	b,64,31);
   outBit64_Sx_NL (4,"NPT_Reference: ",		  	b,75,33);
   outBit_Sx_NL (4,"scaleNumerator: ",		  	b,108,16);
   outBit_Sx_NL (4,"scaleDenominator: ",	  	b,124,16);

}



/*
  0x18   DSMCC  NPT-endpoint descriptor 
  ISO 13818-6 
*/

void descriptorMPEG_NPT_endpoint (u_char *b)
{
   unsigned long long t;

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

   outBit_Sx_NL (6,"reserved: ",		  	b,16,15);

   t = outBit64_Sx (4,"startNPT: ",		  	b,31,33);
       out_nl_calc_NPT (4,t); 

   outBit_Sx_NL (6,"reserved: ",		  	b,64,15);

   t = outBit64_Sx (4,"stopNPT: ",			b,79,33);
       out_nl_calc_NPT (4,t); 

}





/*
  0x19   DSMCC  stream_mode descriptor 
  ISO 13818-6 
*/

void descriptorMPEG_stream_mode (u_char *b)
{
   // descriptor_tag		 = b[0];
   // descriptor_length       	 = b[1];

   outBit_S2x_NL(4,"streamMode: ",		  	b,16, 8,
		   	(char *(*)(u_long)) dsmccStr_streamMode);
   outBit_Sx_NL (6,"reserved: ",		  	b,24, 8);
 
}





/*
  0x1A   DSMCC  stream_event descriptor 
  ISO 13818-6 
*/

void descriptorMPEG_stream_event (u_char *b)
{
   unsigned long long t;
   int len;

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

   outBit_Sx_NL (4,"eventId: ",		  		b,16,16);
   outBit_Sx_NL (6,"reserved: ",		  	b,32,31);
   t = outBit64_Sx (4,"eventNPT: ",		  	b,63,33);
       out_nl_calc_NPT (4,t); 
   
   b += 12;
   len -= 10;

   print_private_data (4, b, len);

}








/*
 * ------------------------------------------------------------
 *
 * -- MPEG4 Descriptors  ISO 13818-1
 *
 */



/*
  0x1B  MPEG4 video  descriptor 
  ISO 13818-1  
*/

void descriptorMPEG_MPEG4_video (u_char *b)

{
 // d.descriptor_tag		 = b[0];
 // d.descriptor_length       	 = b[1];
 outBit_Sx_NL (4,"MPEG4 visual profile and level: ",  	b,16,8); /* $$$  Table */
}


 
/*
  0x1C  MPEG4 audio  descriptor 
  ISO 13818-1  
*/

void descriptorMPEG_MPEG4_audio (u_char *b)

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

 outBit_Sx_NL (4,"MPEG4 audio profile and level: ",  	b,16,8); /* $$$  Table */
}




/*
  0x1D  IOD - InitialObjectDescriptor
  ISO 13818-1  
*/

void descriptorMPEG_IOD (u_char *b)

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

 outBit_Sx_NL (4,"Scope_of_IOD: ",  	b,16,8);
 outBit_Sx_NL (4,"IOD_label: ",  	b,24,8);
 outBit_Sx_NL (4,"InitialObjectDescriptor: ", b,32,8);	// $$$ TODO defined in subclause 8.6.3.1 of ISO/IEC 14496-1
}



/*
  0x1E  SL descriptor
  ISO 13818-1  
*/

void descriptorMPEG_SL (u_char *b)

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

 outBit_Sx_NL (4,"ES_ID: ",  	b,16,16);
}




/*
  0x1F  FMC descriptor
  ISO 13818-1  
*/

void descriptorMPEG_FMC (u_char *b)

{
  int descriptor_length;

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

  b += 2;
  while (descriptor_length > 0 ) {
 	outBit_Sx_NL (4,"ES_ID: ",  		b, 0,16);
 	outBit_Sx_NL (4,"FlexMuxChannel: ",  	b,16, 8);
	b += 3;
	descriptor_length -= 3;
  }

}



/*
  0x20  External SL descriptor
  ISO 13818-1  
*/

void descriptorMPEG_External_ES_ID (u_char *b)

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

 outBit_Sx_NL (4,"ES_ID: ",  	b,16,16);
}





/*
  0x21  MuxCode descriptor
  ISO 13818-1  
*/

void descriptorMPEG_MuxCode (u_char *b)

{
  int len;

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



  print_databytes (4,"MuxCodeTableEntry", b+2, len); // $$$ TODO

   // $$$ TODO  defined in subclause 11.2.4.3 of ISO/IEC 14496-1.
   // Muxcode_descriptor () {
   // 	descriptor_tag 8 uimsbf
   // 	descriptor_length 8 uimsbf
   // 	for (i = 0; i < N; i++) {
   // 		MuxCodeTableEntry ()
   // 	}
   // }


}


/*
  0x22  FMX Buffer Size descriptor
  ISO 13818-1  
*/

void descriptorMPEG_FMXBufferSize (u_char *b)

{
  int len;

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



  indent (+1);
  printhex_buf (4, b+2, len);  // $$$ TODO
  indent (-1);


   // $$$ TODO defined in subclause 11.2 of ISO/IEC 14496-1.
   // FmxBufferSize_descriptor () {
   // 	descriptor_tag 8 uimsbf
   // 	descriptor_length 8 uimsbf
   // 	DefaultFlexMuxBufferDescriptor()
   // 	for (i=0; i<descriptor_length; i += 4) {
   // 		FlexMuxBufferDescriptor()
   // 	}
   // }

}


/*
  0x23   Multiplex Buffer descriptor
  ISO 13818-1  
*/

void descriptorMPEG_MultiplexBuffer (u_char *b)

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


 outBit_S2Tx_NL (4,"MB_buffer_size: ", 	b,16,24,"bytes");
 outBit_S2Tx_NL (4,"TB_leak_rate: ",  	b,40,24,"(x 400 bit/s)");

}




// ---- collision with old H.222.0 draft, obsolete??

// /*
//   0x24   Flex-Mux-Timing descriptor
//   ITU-T H.222.0-I-Cor1 
// */
// 
// void descriptorMPEG_FlexMuxTiming (u_char *b)
// 
// {
//   // d.descriptor_tag		 = b[0];
//   // d.descriptor_length       	 = b[1];
// 
// 
//  outBit_Sx_NL   (4,"FCR_ES_ID: ",  	b,16,16);
//  outBit_S2Tx_NL (4,"FCRResolution: ",  	b,32,32,"(cycles/s)");
//  outBit_Sx_NL   (4,"FCRLength: ",  	b,64, 8);
//  outBit_Sx_NL   (4,"FCRRateLength: ",  	b,72, 8);
// 
// }





/*
  0x24   Content Labeling descriptor
  ITU-T H.222.0 AMD 1
*/

void descriptorMPEG_ContentLabeling (u_char *b)

{
  int     len;
  u_int   maf;
  u_int   crirf;
  u_int   ctbi;


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


// $$$ TODO 
  indent (+1);
  printhex_buf (4, b+2, len);  // $$$ TODO  H.222.0 AMD 1
  indent (-1);


  maf = outBit_S2x_NL   (4,"metadata_application_format: ",  	b, 16, 16,
  		   	(char *(*)(u_long)) dvbstrMPEG_metadata_application_format);

  b   += 4;
  len -= 2;
  if (maf == 0xFFFF) {
  	outBit_Sx_NL   (4,"metadata_application_format_identifier: ",  	b,  0, 32);
	b   += 4;
	len -= 4;
  }


  crirf = outBit_Sx_NL (4,"content_reference_id_record_flag: ",	b,  0,  1);
  ctbi  = outBit_S2x_NL(4,"content_time_base_indicator: ",  	b,  1,  4,
		 (char *(*)(u_long)) dvbstrMPEG_Content_time_base_indicator);
  outBit_Sx_NL   (6,"reserved: ",  				b,  5,  3);
  b++;
  len --;

  if (crirf == 1) {
	u_int  len2;

  	len2 = outBit_Sx_NL (4,"content_reference_id_record_length: ", b, 0, 8);
	print_databytes (4,"content_reference_id_byte:", b+1, len2);
	b   += len2 + 1;
	len -= len2 + 1;
  }



  if ( (ctbi == 1) || (ctbi == 2)) {
	long long ll;

  	outBit_Sx_NL   (6,"reserved: ",  	b,  0,  7);
	ll = getBits48 (b, 0,  7, 33);
	out_S2LL_NL(4,"content_time_base_value: ",ll,"90kHz units");
	// -- following is wrong, because of different unit measuring
	// out (4,"content_time_base_value: ");
	// print_timebase90kHz (4, ll);
	// out_NL (4);

  	outBit_Sx_NL   (6,"reserved: ",  	b, 40,  7);
	ll = getBits48 (b, 0,  47, 33);
	out_S2LL_NL(4,"metadata_time_base_value: ",ll,"90kHz units");
	// -- following is wrong, because of different unit measuring
	// out (4,"metadata_time_base_value: ");
	// print_timebase90kHz (4, ll);
	// out_NL (4);

	b   += 10;
	len -= 10;
  }

  if (ctbi == 2) {
  	outBit_Sx_NL   (6,"reserved: ",  	b,  0,  1);
  	outBit_Sx_NL   (4,"contentId: ",  	b,  1,  7);
	b++;
	len --;
  }

  if ( (ctbi >= 3) && (ctbi <= 7)) {
	u_int  len2;

  	len2 = outBit_Sx_NL (4,"time_base_association_data_length: ", b, 0, 8);
	print_databytes (6,"reserved:", b+1, len2);
	b   += len2 + 1;
	len -= len2 + 1;
  }


  print_private_data (4, b, len);
}







/*
  0x25  TVA metadata pointer descriptor
  TS 102 323  TV ANYTIME 
*/

void descriptorMPEG_TVA_metadata_pointer (u_char *b)

{
  int  len;

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


  indent (+1);
  printhex_buf (4, b+2, len);  // $$$ TODO TS 102 323, where defined?
  indent (-1);
}



/*
  0x26  TVA metadata descriptor
  TS 102 323  TV ANYTIME 
*/

void descriptorMPEG_TVA_metadata (u_char *b)

{
  int  len;

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


  indent (+1);
  printhex_buf (4, b+2, len);  // $$$ TODO TS 102 323, where defined?
  indent (-1);
}




/*
  0x27  TVA metadata STD descriptor
  ISO/IEC 13818-1:2000/DAM-1:2001(E)
*/

void descriptorMPEG_TVA_metadata_STD (u_char *b)

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

  outBit_Sx_NL   (6,"reserved: ",  			b,  16,  2);
  outBit_S2Tx_NL (4,"metadata_input_leak_rate: ",  	b,  18, 22,"(x 400 bit/s)");
  outBit_Sx_NL   (6,"reserved: ",  			b,  40,  2);
  outBit_S2Tx_NL (4,"metadata_buffer_size: ", 		b,  42, 22,"(x 1024 bytes)");
  outBit_Sx_NL   (6,"reserved: ",  			b,  64,  2);
  outBit_S2Tx_NL (4,"metadata_output_leak_rate: ",  	b,  66, 22,"(x 400 bit/s)");
}



/*
  0x28  AVC video descriptor
  H.222.0 AMD 3
*/

void descriptorMPEG_AVC_video (u_char *b)

{
  int  len;

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


  indent (+1);
  printhex_buf (4, b+2, len);  // $$$ TODO 
  indent (-1);
}




/*
  0x29  IPMP descriptor
  H.222.0 AMD 3
*/

void descriptorMPEG_IPMP (u_char *b)

{
  int  len;

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


  indent (+1);
  printhex_buf (4, b+2, len);  // $$$ TODO 
  indent (-1);
}



/*
  0x2A  AVC_timing_and_HRD descriptor
  H.222.0 AMD 3
*/

void descriptorMPEG_AVC_timing_and_HRD (u_char *b)

{
  int  len;

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


  indent (+1);
  printhex_buf (4, b+2, len);  // $$$ TODO 
  indent (-1);
}