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Add a parts-per-billion drift output. Not really verified, but interesting all the same.

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Mike Brady
2015-06-24 16:48:20 +00:00
parent 9d1c0a5576
commit e3722d9309
1 changed files with 10 additions and 0 deletions
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rtp.c
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@@ -307,6 +307,8 @@ static void *rtp_timing_receiver(void *arg) {
processing_time;
local_to_remote_time_jitters = 0;
local_to_remote_time_jitters_count = 0;
uint64_t first_local_to_remote_time_difference = 0;
uint64_t first_local_to_remote_time_difference_time;
uint64_t l2rtd = 0;
while (1) {
if (please_shutdown)
@@ -398,6 +400,14 @@ static void *rtp_timing_receiver(void *arg) {
// with dispersion of %lld us with delta of %lld us",rtus,ji);
local_to_remote_time_difference = l2rtd;
if (first_local_to_remote_time_difference==0) {
first_local_to_remote_time_difference = local_to_remote_time_difference;
first_local_to_remote_time_difference_time = get_absolute_time_in_fp();
}
if (first_local_to_remote_time_difference>=local_to_remote_time_difference)
debug(1,"Clock drift is -%lld ppb.",(((first_local_to_remote_time_difference-local_to_remote_time_difference)*1000000000)/(get_absolute_time_in_fp()-first_local_to_remote_time_difference_time)));
else
debug(1,"Clock drift is %lld ppb.",(((local_to_remote_time_difference-first_local_to_remote_time_difference)*1000000000)/(get_absolute_time_in_fp()-first_local_to_remote_time_difference_time)));
} else {
debug(1, "Timing port -- Unknown RTP packet of type 0x%02X length %d.", packet[1], nread);
}