On Wed, 12 Nov 2008, Alex Betis wrote:
> BTW, you give here example of NIT parsing, do you know the format of the> message and what field specifies that the delivery system is DVB-S2? scan> utility code doesn't parse it, so I just add both DVB-S and DVB-S2 scans for
I've spent yesterday hacking UTF-8 output into my old copyof dvb-apps and then finding that the Greek 13E Hotbirdschannel `Βουλή:12168:h:2:27500:517:700:384' [UTF-8 encoded,hope my MIME headers and ESMTP are correct] is not sent aslatin-greek charset, and thus doesn't appear properly forme, but anyway, here is a code snippet of my `scan' that sendsthe NIT dump of the scanned transponder to stderr, that Iuse when needed. Cut'n'paste; also part of a much largerset of hacks, so it's meant as an example, and not to beused as ``useful'' code:
++char *fec[10] = {"NONE", "1/2", "2/3", "3/4", "4/5", "5/6", "6/7", "7/8", "8/9", "AUTO" } ;+if (tn.type == 0) {+ if (dump_nits == 1) {+ printf("NIT result: %d %s %d pos %.1f%s ", tn.param.frequency, tn.polarisation ? "V" : "H", tn.param.u.qpsk.symbol_rate, (float)tn.orbital_pos/10, tn.we_flag ? "E" : "W");+ printf(" FEC %s", fec[tn.param.u.qpsk.fec_inner] );+if (tn.modulation & 0x04) {+ printf(" DVB-S2");+ if ((tn.modulation & 0x03) == 0x01) printf (" QPSK");+ if ((tn.modulation & 0x03) == 0x02) printf (" 8PSK");++}+if (tn.param.inversion != 2)+ printf(" inv %s", tn.param.inversion ? "OFF" : "ON" /*XXX FIXME */);+printf("\n");+ }+}+
Also, I believe that the recent `dvbsnoop' invoked with`-s ts -tssubdecode' on the NIT PID will verbosely parsethe components and display everything -- I believe I usedthat source code as the basis for the above hack.
I wonder if any of my other dvb-apps/scan hacks would beof interest for someone to clean up (for me, functionbefore form, especially when I don't have a clue as towhat I am doing)...
barry bouwsma
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