112 lines
4.6 KiB
C
112 lines
4.6 KiB
C
#ifdef HAVE_ALSA
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#include "../libsound/sound.h"
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#endif
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#ifdef HAVE_SDR
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#include "../libsdr/sdr.h"
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#endif
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#include "../libwave/wave.h"
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#include "../libsamplerate/samplerate.h"
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#include "../libjitter/jitter.h"
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#include "../libemphasis/emphasis.h"
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#include "../libdisplay/display.h"
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#define MAX_SENDER 16
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/* how to send a 'paging' signal (trigger transmitter) */
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enum paging_signal {
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PAGING_SIGNAL_NONE = 0,
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PAGING_SIGNAL_TONE,
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PAGING_SIGNAL_NOTONE,
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PAGING_SIGNAL_POSITIVE,
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PAGING_SIGNAL_NEGATIVE,
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};
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/* common structure of each transmitter */
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typedef struct sender {
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struct sender *next;
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struct sender *slave; /* points to 'slave' that uses next channel of audio device */
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struct sender *master; /* if set, the audio device is owned by 'master' */
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/* system info */
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const char *kanal; /* channel number */
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double sendefrequenz; /* transmitter frequency */
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double empfangsfrequenz; /* receiver frequency */
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double ruffrequenz; /* special paging frequency used for B-Netz */
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/* FM/AM levels */
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int am; /* use AM instead of FM */
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double max_deviation; /* max frequency deviation / level */
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double max_modulation; /* max frequency modulated */
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double speech_deviation; /* deviation / level of 1000 Hz reference tone at speech level */
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double modulation_index; /* AM modulation index */
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double max_display; /* level of displaying wave form */
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/* audio */
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void *audio;
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char device[64]; /* audio device name (alsa or sdr) */
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void *(*audio_open)(int, const char *, double *, double *, int *, int, double, int, int, double, double, double, double);
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int (*audio_start)(void *);
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void (*audio_close)(void *);
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int (*audio_write)(void *, sample_t **, uint8_t **, int, enum paging_signal *, int *, int);
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int (*audio_read)(void *, sample_t **, int, int, double *);
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int (*audio_get_tosend)(void *, int);
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int samplerate;
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samplerate_t srstate; /* sample rate conversion state */
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double rx_gain; /* factor of level to apply on RX samples */
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double tx_gain; /* factor of level to apply on TX samples */
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int pre_emphasis; /* use pre_emhasis, done by sender */
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int de_emphasis; /* use de_emhasis, done by sender */
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emphasis_t estate; /* pre and de emphasis */
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/* loopback test */
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int loopback; /* 0 = off, 1 = internal, 2 = external, 3 = audio loop */
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/* record and playback */
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const char *write_rx_wave; /* file name pointers */
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const char *write_tx_wave;
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const char *read_rx_wave;
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const char *read_tx_wave;
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wave_rec_t wave_rx_rec; /* wave recording (from rx) */
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wave_rec_t wave_tx_rec; /* wave recording (from tx) */
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wave_play_t wave_rx_play; /* wave playback (as rx) */
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wave_play_t wave_tx_play; /* wave playback (as tx) */
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/* audio buffer for audio to send to transmitter */
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jitter_t dejitter;
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jitter_t loop_dejitter;
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uint16_t loop_sequence; /* sequence + ts for loopback mode */
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uint32_t loop_timestamp;
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/* audio buffer for audio to send to caller (20ms = 160 samples @ 8000Hz) */
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sample_t rxbuf[160];
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int rxbuf_pos; /* current fill of buffer */
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/* paging tone */
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enum paging_signal paging_signal; /* if paging signal is used and how it is performed */
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int paging_on; /* 1 or 0 for on or off */
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/* display wave */
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dispwav_t dispwav; /* display wave form */
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/* display measurements */
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dispmeas_t dispmeas; /* display measurements */
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} sender_t;
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extern sender_t *sender_head;
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extern int cant_recover;
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extern int check_channel;
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int sender_create(sender_t *sender, const char *kanal, double sendefrequenz, double empfangsfrequenz, 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, enum paging_signal paging_signal);
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void sender_destroy(sender_t *sender);
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void sender_set_fm(sender_t *sender, double max_deviation, double max_modulation, double speech_deviation, double max_display);
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void sender_set_am(sender_t *sender, double max_modulation, double speech_deviation, double max_display, double modulation_index);
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int sender_open_audio(int buffer_size, double interval);
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int sender_start_audio(void);
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void process_sender_audio(sender_t *sender, int *quit, sample_t **samples, uint8_t **power, int buffer_size);
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void sender_send(sender_t *sender, sample_t *samples, uint8_t *power, int count);
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void sender_receive(sender_t *sender, sample_t *samples, int count, double rf_level_db);
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void sender_paging(sender_t *sender, int on);
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sender_t *get_sender_by_empfangsfrequenz(double freq);
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void sender_conceal(uint8_t *_spl, int len, void __attribute__((unused)) *priv);
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