[linux-dvb] Re: "scan" utility

[Florian Steinel <florian.steinel@t-online.de>]

Johannes Stezenbach wrote:

> I corrected scan output for VDR / DVB-C. DVB-S is not implemented
> yet, if someone cares then please send a patch.
>  
Hi list,
i'm currently writing the patch for dvb-s vdr output format.
While doing so, i have to parse the orbital position and the westeast flag
as mentioned in ETSI EN 300 468 V010401 / 6.2.12.2 
satellite_delivery_system_descriptor.
The t->orbital_pos is ok at Astra 19.2°E but t->we_flag is always -1 .
What's wrong?

_ETSI_:
/* Syntax  ./. No. of bits ./.  Identifier */
satellite_delivery_system_descriptor()
{ descriptor_tag         8 uimsbf
descriptor_length       8 uimsbf
frequency              32 bslbf
orbital_position       16 bslbf
west_east_flag          1 bslbf
polarization            2 bslbf
modulation              5 bslbf
symbol_rate            28 bslbf
FEC_inner               4 bslbf }

_scan.c_:
static
void parse_satellite_delivery_system_descriptor (const unsigned char *buf,
                                                struct transponder *t)
{
       t->type = FE_QPSK;
       t->param.frequency = 10 * bcd32_to_cpu (buf[2], buf[3], buf[4], 
buf[5]);
       t->param.u.qpsk.fec_inner = fec_tab[buf[12] & 0x07];
       t->param.u.qpsk.symbol_rate = 10 * bcd32_to_cpu (buf[9],
                                                        buf[10],
                                                        buf[11],
                                                        buf[12] & 0xf0);

       t->polarisation = (buf[8] >> 5) & 0x03;
       t->param.inversion = INVERSION_AUTO;

       t->orbital_pos = bcd32_to_cpu (0x00,
                                      0x00,
                                      buf[6],
                                      buf[7]);
       t->we_flag =  buf[8] & 0x7f;

       dump_dvb_parameters (stderr, t);
       if (t->scan_done)
               fprintf (stderr, " (done)");
       if (t->last_tuning_failed)
               fprintf (stderr, " (tuning failed)");
       fprintf (stderr, "\n");
}




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