initial git import

src/common/sender.h

@@ -0,0 +1,50 @@
+#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);
+