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B-Netz: Work on pilot signal generation

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The pilot signal to switch to channel 19 can be:
 * a tone
 * a tone that is turned off (notone)
 * positive amplitude
 * negative amplitude
This commit is contained in:
Andreas Eversberg
2016-10-03 14:46:25 +02:00
committed by Andreas Eversberg
parent e029a6a858
commit b205cfcf03
8 changed files with 55 additions and 27 deletions
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14
src/common/sender.h
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@@ -8,6 +8,15 @@
#define MAX_SENDER 16
/* how to send a 'pilot' signal (trigger transmitter) */
enum pilot_signal {
PILOT_SIGNAL_NONE = 0,
PILOT_SIGNAL_TONE,
PILOT_SIGNAL_NOTONE,
PILOT_SIGNAL_POSITIVE,
PILOT_SIGNAL_NEGATIVE,
};
/* common structure of each transmitter */
typedef struct sender {
struct sender *next;
@@ -47,7 +56,7 @@ typedef struct sender {
loss_t loss;
/* pilot tone */
int use_pilot_signal; /* -1 if not used, 1 for positive, 0 for negative, 2 for tone */
enum pilot_signal pilot_signal; /* if pilot signal is used and how it is performed */
int pilot_on; /* 1 or 0 for on or off */
double pilotton_phaseshift; /* phase to shift every sample */
double pilotton_phase; /* current phase */
@@ -60,9 +69,10 @@ typedef struct sender {
extern sender_t *sender_head;
extern int cant_recover;
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_wave, const char *read_wave, int loopback, double loss_volume, int use_pilot_signal);
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_wave, const char *read_wave, int loopback, double loss_volume, enum pilot_signal pilot_signal);
void sender_destroy(sender_t *sender);
void process_sender_audio(sender_t *sender, int *quit, int latspl);
void sender_send(sender_t *sender, int16_t *samples, int count);
void sender_receive(sender_t *sender, int16_t *samples, int count);
void sender_pilot(sender_t *sender, int on);