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