80 lines
2.7 KiB
C
80 lines
2.7 KiB
C
#include "sound.h"
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#include "wave.h"
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#include "samplerate.h"
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#include "jitter.h"
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#include "loss.h"
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#include "emphasis.h"
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#include "display_wave.h"
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#define MAX_SENDER 16
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/* how to send a 'pilot' signal (trigger transmitter) */
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enum pilot_signal {
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PILOT_SIGNAL_NONE = 0,
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PILOT_SIGNAL_TONE,
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PILOT_SIGNAL_NOTONE,
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PILOT_SIGNAL_POSITIVE,
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PILOT_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 audio device slave member */
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struct sender *master; /* points to audio device master source */
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/* system info */
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int kanal; /* channel number */
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/* sound */
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void *sound;
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char sounddev[64]; /* sound device name */
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int samplerate;
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int cross_channels; /* swap right and left on IO */
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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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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 */
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/* record and playback */
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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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/* audio buffer for audio to send to transmitter (also used as loopback buffer) */
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jitter_t audio;
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/* audio buffer for audio to send to caller (20ms = 160 samples @ 8000Hz) */
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int16_t rxbuf[160];
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int rxbuf_pos; /* current fill of buffer */
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/* loss of carrier detection */
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double loss_volume;
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loss_t loss;
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/* pilot tone */
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enum pilot_signal pilot_signal; /* if pilot signal is used and how it is performed */
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int pilot_on; /* 1 or 0 for on or off */
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double pilotton_phaseshift; /* phase to shift every sample */
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double pilotton_phase; /* current phase */
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/* display wave */
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dispwav_t dispwav; /* display wave form */
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} sender_t;
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/* list of all senders */
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extern sender_t *sender_head;
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extern int cant_recover;
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int sender_create(sender_t *sender, int kanal, const char *sounddev, int samplerate, int cross_channels, double rx_gain, int pre_emphasis, int de_emphasis, const char *write_rx_wave, const char *write_tx_wave, const char *read_rx_wave, int loopback, double loss_volume, enum pilot_signal pilot_signal);
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void sender_destroy(sender_t *sender);
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void process_sender_audio(sender_t *sender, int *quit, int latspl);
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void sender_send(sender_t *sender, int16_t *samples, int count);
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void sender_receive(sender_t *sender, int16_t *samples, int count);
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void sender_pilot(sender_t *sender, int on);
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