biop_servgatinf.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: biop_servgatinf.c,v 1.1 2004/02/24 23:03:04 rasc Exp $


 DVBSNOOP

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

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

 -- dsmcc  BIOP::ServiceGatewayInfo()
 -- TR 101 202 v1.2.1  4.7.5.2




$Log: biop_servgatinf.c,v $
Revision 1.1  2004/02/24 23:03:04  rasc
private data of DSMCC::DSI
BIOP::ServiceGatewayInformation()
IOP::IOR()





*/




#include "dvbsnoop.h"
#include "biop_servgatinf.h"
#include "iop_ior.h"
#include "dsmcc_misc.h"
#include "descriptors/descriptor.h"

#include "misc/output.h"
#include "misc/hexprint.h"

#include "strings/dsmcc_str.h"
#include "strings/dvb_str.h"




/*
 * dsmcc BIOP::ServiceGatewayInfo()
 * TR 101 202 v 1.2.1
 * return: length used
 */


int BIOP_ServiceGatewayInfo (int v, u_char *b, u_int len)
{
   int   	len_org = len;
   int		i,x;
   int 		n1,n2;



	out_nl (v, "BIOP::ServiceGatewayInfo:");

	indent (+1);

	x = IOP_IOR (v,b);
	b += x;
	len -= x;


	n1 = outBit_Sx_NL (v,"downloadTaps_count: ",		b,  0,  8);
	b++;
	len--;
//	for (i=0; i < n1; i++) {
//		x = DSM_Tap(v, b, len);
//		b += x;
//		len -= x;
//	}
	print_databytes (v,"DSM_TAP:", b, n1);   // $$$ TODO
	b += n1; len -= n1;


	n1 = outBit_Sx_NL (v,"serviceContextList_count: ",	b,  0,  8);
	b++;
	len--;
	for (i=0; i < n1; i++) {
		outBit_Sx_NL (v,"context_id: ",			b,  0,  32);
		n2 = outBit_Sx_NL (v,"context_data_length: ",	b,  32, 16);

		print_databytes (v,"context_data:", b+6, n2);   // $$$ TODO

		b += 6 + n2;
		len -= 6 + n2;
	}


	n1 = outBit_Sx_NL (v,"userInfoLength: ",		b,  0,  16);
	dsmcc_CarouselDescriptor_Loop ("userInfo", b+2, n1);
	b   += 2+n1;
	len -= 2+n1;


	indent (-1);

	return len_org;
}







// BIOP::ServiceGatewayInfo()::
// The user info field shall be structured as a descriptor loop.
// The descriptors in this loop shall be either descriptors as
// defined in the DVB Data Broadcasting Specification or private descriptors.