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AMPS: Add DTX support

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When DTX is enabled (-S dtx=2 or 3), a missing SAT tone causes the receiver
to mute audio and insert a low level of comfort noise.
Also the missing SAT tone will not cause the connection to be terminated.
This commit is contained in:
Andreas Eversberg
2017-05-25 09:57:22 +02:00
parent 2c1ab89723
commit bb64c6b3ba
7 changed files with 65 additions and 26 deletions
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5
src/amps/amps.h
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@@ -139,9 +139,10 @@ typedef struct amps {
int sat_filter_pos; /* current sample position in filter_spl */
double sat_phaseshift65536[3]; /* how much the phase of sine wave changes per sample */
double sat_phase65536; /* current phase */
int sat_detected; /* current detection state flag */
int dtx_state; /* 1 = high (fast sat detection) */
int sat_detected; /* current detection state flag (delayed detection) */
int sat_detect_count; /* current number of consecutive detections/losses */
int sig_detected; /* current detection state flag */
int sig_detected; /* current detection state flag (delayed detection) */
int sig_detect_count; /* current number of consecutive detections/losses */
double test_phaseshift65536; /* how much the phase of sine wave changes per sample */
double test_phase65536; /* current phase */