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#include "sound.h"
#include "samplerate.h"
#include "jitter.h"
#include "loss.h"
/* common structure of each transmitter */
typedef struct sender {
struct sender *next;
/* call reference */
int callref;
/* system info */
int kanal; /* channel number */
/* sound */
void *sound;
int samplerate;
samplerate_t srstate; /* sample rate conversion state */
/* loopback test */
int loopback; /* 0 = off, 1 = internal, 2 = external */
/* audio buffer for audio to send to transmitter (also used as loopback buffer) */
jitter_t audio;
/* audio buffer for audio to send to caller (20ms = 160 samples @ 8000Hz) */
int16_t rxbuf[160];
int rxbuf_pos; /* current fill of buffer */
/* loss of carrier detection */
double loss_volume;
loss_t loss;
/* pilot tone */
int use_pilot_signal; /* -1 if not used, 1 for positive, 0 for negative, 2 for tone */
int pilot_on; /* 1 or 0 for on or off */
double pilotton_phaseshift; /* phase to shift every sample */
double pilotton_phase; /* current phase */
} sender_t;
/* list of all senders */
extern sender_t *sender_head;
int sender_create(sender_t *sender, const char *sounddev, int samplerate, int kanal, int loopback, double loss_volume, int use_pilot_signal);
void sender_destroy(sender_t *sender);
void sender_send(sender_t *sender, int16_t *samples, int count);
void sender_receive(sender_t *sender, int16_t *samples, int count);
void main_loop(int *quit, int latency);
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