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#include "../common/sender.h"
#include "../common/compandor.h"
#include "../common/dtmf.h"
#include "dms.h"
enum dsp_mode {
DSP_MODE_DIALTONE, /* stream dial tone to mobile phone */
DSP_MODE_AUDIO, /* stream audio */
DSP_MODE_SILENCE, /* stream nothing */
DSP_MODE_FRAME, /* send frames */
DSP_MODE_DTMF, /* send DTMF tones */
};
enum nmt_chan_type {
CHAN_TYPE_CC, /* calling channel */
CHAN_TYPE_TC, /* traffic channel */
CHAN_TYPE_CC_TC, /* combined CC + TC */
CHAN_TYPE_TEST, /* test channel */
};
enum nmt_state {
STATE_NULL, /* power off state */
STATE_IDLE, /* channel is not in use */
STATE_ROAMING_IDENT, /* seizure received, waiting for identity */
STATE_ROAMING_CONFIRM, /* identity received, sending confirm */
STATE_MO_IDENT, /* seizure of mobile originated call, waiting for identity */
STATE_MO_CONFIRM, /* identity received, sending confirm */
STATE_MO_DIALING, /* receiving digits from phone */
STATE_MO_COMPLETE, /* all digits received, completing call */
STATE_MT_PAGING, /* paging mobile phone */
STATE_MT_CHANNEL, /* assigning traffic channel */
STATE_MT_IDENT, /* waiting for identity */
STATE_MT_RINGING, /* mobile phone is ringing, waiting for answer */
STATE_MT_COMPLETE, /* mobile phone has answered, completing call */
STATE_ACTIVE, /* during active call */
STATE_MO_RELEASE, /* acknowlegde release from mobile phone */
STATE_MT_RELEASE, /* sending release toward mobile phone */
};
enum nmt_active_state {
ACTIVE_STATE_VOICE, /* normal conversation */
ACTIVE_STATE_MFT_IN, /* ack MFT converter in */
ACTIVE_STATE_MFT, /* receive digits in MFT mode */
ACTIVE_STATE_MFT_OUT, /* ack MFT converter out */
};
enum nmt_direction {
MTX_TO_MS,
MTX_TO_BS,
MTX_TO_XX,
BS_TO_MTX,
MS_TO_MTX,
XX_TO_MTX,
};
typedef struct nmt_sysinfo {
enum nmt_chan_type chan_type; /* channel type */
int ms_power; /* ms power level 3 = full */
uint8_t traffic_area; /* two digits traffic area, encoded as YY */
uint8_t area_no; /* Area no. 1..4, 0 = no Area no. */
} nmt_sysinfo_t;
typedef struct nmt_subscriber {
/* NOTE: country must be followed by number, so both represent a string */
char country; /* country digit */
char number[7]; /* phone suffix */
char password[4]; /* phone's password + '\0' */
int coinbox; /* phone is a coinbox and accept tariff information */
} nmt_subscriber_t;
const char *nmt_dir_name(enum nmt_direction dir);
typedef struct nmt {
sender_t sender;
nmt_sysinfo_t sysinfo;
compandor_t cstate;
dtmf_t dtmf;
/* sender's states */
enum nmt_state state;
enum nmt_active_state active_state;
nmt_subscriber_t subscriber; /* current subscriber */
struct timer timer;
int rx_frame_count; /* receive frame counter */
int tx_frame_count; /* transmit frame counter */
char dialing[33]; /* dialed digits */
int page_try; /* number of paging try */
int mft_num; /* counter for digit for MFT */
/* special state for paging on different CC */
struct nmt *page_for_nmt; /* only page and assign channel for nmt instance as set */
int mt_channel; /* channel to use */
/* features */
int compandor; /* if compandor shall be used */
int supervisory; /* if set, use supervisory signal 1..4 */
/* dsp states */
enum dsp_mode dsp_mode; /* current mode: audio, durable tone 0 or 1, paging */
int samples_per_bit; /* number of samples for one bit (1200 Baud) */
int super_samples; /* number of samples in buffer for supervisory detection */
int fsk_coeff[2]; /* coefficient k = 2*cos(2*PI*f/samplerate), k << 15 */
int super_coeff[5]; /* coefficient for supervisory signal */
int16_t *fsk_sine[2][2]; /* 4 pointers to 4 precalc. sine curves */
int fsk_polarity; /* current polarity state of bit */
int samples_per_chunk; /* how many samples lasts one chunk */
int16_t *fsk_filter_spl; /* array with samples_per_chunk */
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_sync; /* shift register to detect sync */
int fsk_filter_in_sync; /* if we are in sync and receive bits */
int fsk_filter_mute; /* mute count down after sync */
char fsk_filter_frame[141]; /* receive frame (one extra byte to terminate string) */
int fsk_filter_count; /* next bit to receive */
double fsk_filter_level[256]; /* level infos */
double fsk_filter_quality[256];/* quality infos */
int16_t *super_filter_spl; /* array with sample buffer for supervisory detection */
int super_filter_pos; /* current sample position in filter_spl */
double super_phaseshift256[4]; /* how much the phase of sine wave changes per sample */
double super_phase256; /* current phase */
double dial_phaseshift256; /* how much the phase of sine wave changes per sample */
double dial_phase256; /* current phase */
int frame; /* set, if there is a valid frame */
int16_t *frame_spl; /* 166 * fsk_bit_length */
int frame_pos; /* current sample position in frame_spl */
uint64_t rx_sample_count; /* sample counter */
uint64_t rx_sample_count_current;/* sample counter of current frame */
uint64_t rx_sample_count_last; /* sample counter of last frame */
int super_detected; /* current detection state flag */
int super_detect_count; /* current number of consecutive detections/losses */
/* DMS states */
int dms_call; /* indicates that this call is a DMS call */
dms_t dms; /* DMS states */
} nmt_t;
void nmt_channel_list(void);
int nmt_channel_by_short_name(const char *short_name);
const char *chan_type_short_name(enum nmt_chan_type chan_type);
const char *chan_type_long_name(enum nmt_chan_type chan_type);
double nmt_channel2freq(int channel, int uplink);
void nmt_country_list(void);
uint8_t nmt_country_by_short_name(const char *short_name);
int nmt_create(int channel, enum nmt_chan_type chan_type, const char *sounddev, int samplerate, int cross_channels, double rx_gain, int pre_emphasis, int de_emphasis, const char *write_wave, const char *read_wave, uint8_t ms_power, uint8_t traffic_area, uint8_t area_no, int compandor, int supervisory, int loopback);
void nmt_destroy(sender_t *sender);
void nmt_receive_frame(nmt_t *nmt, const char *bits, double quality, double level, double frames_elapsed);
const char *nmt_get_frame(nmt_t *nmt);
void nmt_rx_super(nmt_t *nmt, int tone, double quality);
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