diff options
Diffstat (limited to 'src/bnetz/bnetz.h')
| -rw-r--r-- | src/bnetz/bnetz.h | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/src/bnetz/bnetz.h b/src/bnetz/bnetz.h new file mode 100644 index 0000000..2064e63 --- /dev/null +++ b/src/bnetz/bnetz.h @@ -0,0 +1,99 @@ +#include "../common/sender.h" + +/* fsk modes of transmission */ +enum dsp_mode { + DSP_MODE_AUDIO, /* stream audio */ + DSP_MODE_SILENCE, /* sending silence */ + DSP_MODE_0, /* send tone 0 */ + DSP_MODE_1, /* send tone 1 */ + DSP_MODE_TELEGRAMM, /* send "Telegramm" */ +}; + +/* current state of b-netz sender */ +enum bnetz_state { + BNETZ_FREI, /* sending 'Gruppenfreisignal' */ + BNETZ_WAHLABRUF, /* sending 'Wahlabruf', receiving call setup */ + BNETZ_SELEKTIVRUF, /* paging phone */ + BNETZ_RUFBESTAETIGUNG, /* waitig for acknowledge from phone */ + BNETZ_RUFHALTUNG, /* phone is ringing */ + BNETZ_GESPRAECH, /* during conversation */ + BNETZ_TRENNEN, /* release of call */ +}; + +/* current state of received dialing */ +enum dial_mode { + DIAL_MODE_START, + DIAL_MODE_STATIONID, + DIAL_MODE_NUMBER, + DIAL_MODE_START2, + DIAL_MODE_STATIONID2, + DIAL_MODE_NUMBER2, +}; + +/* current state of paging mobile station */ +enum page_mode { + PAGE_MODE_NUMBER, + PAGE_MODE_KANALBEFEHL, +}; + +/* instance of bnetz sender */ +typedef struct bnetz { + sender_t sender; + + /* system info */ + int gfs; /* 'Gruppenfreisignal' */ + + /* switch sender to channel 19 */ + char pilot_file[256]; /* if set, write to given file to switch to channel 19 or back */ + char pilot_on[256]; /* what to write to switch to channel 19 */ + char pilot_off[256]; /* what to write to switch back */ + int pilot_is_on; /* set, if we are on channel 19. also used to switch back on exit */ + + /* all bnetz states */ + enum bnetz_state state; /* main state of sender */ + enum dial_mode dial_mode; /* sub state while dialing is received */ + int dial_metering; /* set, if phone supports metering pulses */ + char dial_number[14]; /* dial string received */ + int dial_pos; /* current position while receiving digits */ + char station_id[6]; /* current station ID */ + int station_id_pos; /* position while transmitting */ + enum page_mode page_mode; /* sub state while paging */ + int page_try; /* try number (1 or 2) */ + struct timer timer; + int trenn_count; /* count number of release messages */ + + /* dsp states */ + enum dsp_mode dsp_mode; /* current mode: audio, durable tone 0 or 1, "Telegramm" */ + int fsk_coeff[2]; /* coefficient k = 2*cos(2*PI*f/samplerate), k << 15 */ + int samples_per_bit; /* how many samples lasts one bit */ + int16_t *fsk_filter_spl; /* array with samples_per_bit */ + int fsk_filter_pos; /* current sample position in filter_spl */ + int fsk_filter_step; /* number of samples for each analyzation */ + int fsk_filter_bit; /* last bit, so we detect a bit change */ + int fsk_filter_sample; /* sample counter for shifting receive bits */ + uint16_t fsk_filter_telegramm; /* rx shift register for receiveing telegramm */ + double fsk_filter_quality[16]; /* quality of each bit in telegramm */ + double fsk_filter_level[16]; /* level of each bit in telegramm */ + int fsk_filter_qualidx; /* index of quality array above */ + int tone_detected; /* what tone has been detected */ + int tone_count; /* how long has that tone been detected */ + double phaseshift256[2]; /* how much the phase of sine wave changes per sample */ + double phase256; /* current phase */ + const char *telegramm; /* current telegramm sequence */ + int16_t *telegramm_spl; /* 16 * samples_per_bit */ + int telegramm_pos; /* current sample position in telegramm_spl */ + + /* loopback test for latency */ + int loopback_count; /* count digits from 0 to 9 */ + double loopback_time[10]; /* time stamp when sending digits 0..9 */ +} bnetz_t; + +double bnetz_kanal2freq(int kanal, int unterband); +int bnetz_init(void); +int bnetz_create(const char *sounddev, int samplerate, int kanal, int gfs, int loopback, double loss_volume, const char *pilot); +void bnetz_destroy(sender_t *sender); +void bnetz_loss_indication(bnetz_t *bnetz); +void bnetz_receive_tone(bnetz_t *bnetz, int bit); +void bnetz_receive_telegramm(bnetz_t *bnetz, uint16_t telegramm, double quality, double level); +const char *bnetz_get_telegramm(bnetz_t *bnetz); + |