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#include "../libsquelch/squelch.h"
#include "../libfm/fm.h"
#include "../libmobile/sender.h"
enum dsp_mode {
DSP_MODE_OFF = 0, /* transmitter off */
DSP_MODE_TONE, /* send tone or silence */
DSP_MODE_AUDIO, /* send audio */
};
#define TONE_GUARD 0
#define TONE_IDLE 1
#define TONE_SEIZE 2
#define TONE_CONNECT 3
#define TONE_DISCONNECT 4
#define TONE_600 5
#define TONE_1500 6
#define TONE_SILENCE 7
#define TONE_NOISE 8
#define TONE_DIALTONE 9
#define NUM_SIG_TONES 7
enum mode {
MODE_IMTS = 0,
MODE_MTS,
};
enum imts_state {
IMTS_NULL = 0,
/* channel is idle */
IMTS_OFF, /* base station not in use and turned off */
IMTS_IDLE, /* base station not in use and sending 2000 Hz Idle tone */
/* mobile originated */
IMTS_SEIZE, /* base station sends seize to acknowldege call from mobile */
IMTS_ANI, /* base station is receiving ANI from mobile */
IMTS_DIALING, /* base station is receiving dial digits */
/* mobile terminated */
IMTS_PAGING, /* base station is paging mobile */
IMTS_RINGING, /* base station is ringing mobile */
/* active call */
IMTS_CONVERSATION, /* base station and mobile have conversation */
/* releasing call */
IMTS_RELEASE, /* base station turned off */
/* loopback test */
IMTS_PAGING_TEST, /* loopback test sequence */
/* detector test */
IMTS_DETECTOR_TEST, /* detector test sequence */
};
typedef struct imts {
sender_t sender;
/* channel's states */
enum imts_state state; /* current sender's state */
int pre_emphasis; /* use pre_emphasis by this instance */
int de_emphasis; /* use de_emphasis by this instance */
emphasis_t estate;
int callref; /* call reference */
char station_id[11]; /* current station ID (also used for test pattern) */
char dial_number[33]; /* number dialing */
struct osmo_timer_list timer;
int last_tone; /* last tone received */
double last_sigtone_amplitude; /* amplitude of last signaling tone received */
double fast_seize; /* fast seize: guard-length - roundtrip-delay */
double rx_guard_timestamp; /* start of guard tone (seize by mobile) */
double rx_guard_duration; /* duration of guard (only long guards are detected) */
int rx_ani_pulse; /* current pulse # receiving */
int rx_ani_index; /* current digit # receiving */
int rx_ani_totpulses; /* total pulses count receiving */
int rx_dial_pulse; /* current pulse # receiving */
int rx_dial_index; /* current digit # receiving */
int rx_disc_pulse; /* current pulse # receiving */
int tx_page_pulse; /* current pulse # transmitting */
int tx_page_index; /* current digit # transmitting */
double tx_page_timestamp; /* last pulse of digit transmitting */
int tx_ring_pulse; /* current pulse # transmitting */
int rx_page_pulse; /* current pulse # receiving */
double detector_test_length_1; /* detector test tone duration */
double detector_test_length_2; /* detector test tone duration */
double detector_test_length_3; /* detector test tone duration */
/* MTS additional states */
enum mode mode; /* set if MTS mode is used */
const char *operator; /* operator's number to call when seizing the channel */
/* display measurements */
dispmeasparam_t *dmp_tone_level;
dispmeasparam_t *dmp_tone_quality;
/* dsp states */
double sample_duration; /* 1 / samplerate */
double demod_center; /* center frequency for tone demodulation */
double demod_bandwidth; /* bandwidth for tone demodulation */
fm_demod_t demod; /* demodulator for frequency / amplitude */
iir_filter_t demod_freq_lp; /* filter for frequency response */
iir_filter_t demod_ampl_lp; /* filter for amplitude response */
int demod_current_tone; /* current tone being detected */
int demod_sig_tone; /* current tone is a signaling tone */
int demod_last_tone; /* last tone being detected */
double demod_sustain; /* how long a tone must sustain */
double demod_duration; /* duration of last tone */
double demod_quality_time; /* time counter to measure quality */
int demod_quality_count; /* counter to measure quality */
double demod_quality_value; /* sum of quality samples (must be divided by count) */
double display_interval; /* used to update tone levels */
enum dsp_mode dsp_mode; /* current mode: audio, durable tone 0 or 1, paging */
int ptt; /* set, if push to talk is used (transmitter of phone off) */
int tone; /* current tone to send */
int tone_duration; /* if set, tone is limited to this duration (in samples) */
double tone_idle_phaseshift65536;/* how much the phase of sine wave changes per sample */
double tone_seize_phaseshift65536;/* how much the phase of sine wave changes per sample */
double tone_600_phaseshift65536;/* how much the phase of sine wave changes per sample */
double tone_1500_phaseshift65536;/* how much the phase of sine wave changes per sample */
double tone_dialtone_phaseshift65536[2];/* how much the phase of sine wave changes per sample */
double tone_phase65536[2]; /* current phase */
squelch_t squelch; /* squelch detection process */
int is_mute; /* set if quelch has muted */
int rf_signal; /* set if we have currently an RF signal */
sample_t *delay_spl; /* delay buffer for delaying audio */
int delay_pos; /* position in delay buffer */
int delay_max; /* number of samples in delay buffer */
} imts_t;
const char *mts_number_valid(const char *number);
void imts_list_channels(void);
double imts_channel2freq(const char *kanal, int uplink);
int imts_init(void);
int imts_create(const char *channel, const char *device, int use_sdr, int samplerate, double rx_gain, double tx_gain, int pre_emphasis, int de_emphasis, const char *write_rx_wave, const char *write_tx_wave, const char *read_rx_wave, const char *read_tx_wave, int loopback, double squelch_db, int ptt, double fast_seize, enum mode mode, const char *operator, double length_1, double length_2, double length_3);
void imts_destroy(sender_t *sender);
void imts_loss_indication(imts_t *imts, double loss_time);
void imts_signal_indication(imts_t *imts);
void imts_receive_tone(imts_t *imts, int tone, double elapsed, double amplitude);
void imts_lost_tone(imts_t *imts, int tone, double elapsed);
void imts_tone_sent(imts_t *imts, int tone);
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