[linux-dvb] Re: Types and capabilites for HDTV ATSC.

[Holger Waechtler]

Johannes Stezenbach wrote:
Holger Waechtler wrote:
struct dvb_atsc_parameters {
        fe_modulation_t  modulation;
        /* anything more? maybe 8VSB or 16VSB? */
};
struct dvb_frontend_parameters {
       __u32 frequency;
       fe_spectral_inversion_t inversion;
       union {
               struct dvb_qpsk_parameters qpsk;
               struct dvb_qam_parameters  qam;
               struct dvb_ofdm_parameters ofdm;
               struct dvb_atsc_parameters atsc;
       } u;
};

But you better make sure dvb_atsc_parameters isn't larger
than any of the other ones; if the size of struct
dvb_frontend_parameters changes, you'll break binary
compatibility.
are you sure? It should be safe because the extended struct fields would 
only get accessed it (fe_type == FE_ATSC), not?

(in any case I doubt that the atsc parameter set will get larger than 
the DVB-T monster - ;)

Holger