109 lines
4.3 KiB
C
109 lines
4.3 KiB
C
#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_EIN, /* paging phone (switch to calling channel) */
|
|
BNETZ_SELEKTIVRUF_AUS, /* paging phone (wait before switching back) */
|
|
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 dialing type (metering support) */
|
|
enum dial_type {
|
|
DIAL_TYPE_NOMETER,
|
|
DIAL_TYPE_METER,
|
|
DIAL_TYPE_METER_MUENZ,
|
|
};
|
|
|
|
/* 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 */
|
|
int callref; /* call reference */
|
|
enum dial_mode dial_mode; /* sub state while dialing is received */
|
|
enum dial_type dial_type; /* defines if mobile 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; /* count until it is time to sample bit */
|
|
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 */
|
|
int telegramm; /* set, if there is a valid telegram */
|
|
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(int kanal, const char *sounddev, int samplerate, int cross_channels, double rx_gain, int gfs, int pre_emphasis, int de_emphasis, const char *write_wave, const char *read_wave, int loopback, double loss_factor, 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 level, double quality);
|
|
const char *bnetz_get_telegramm(bnetz_t *bnetz);
|
|
|