gstreamer/libs/gst
Sebastian Dröge 8d77759834 ptp: Initial implementation of a PTP clock
GstPtpClock implements a PTP (IEEE1588:2008) ordinary clock in
slave-only mode, that allows a GStreamer pipeline to synchronize
to a PTP network clock in some specific domain.

The PTP subsystem can be initialized with gst_ptp_init(), which then
starts a helper process to do the actual communication via the PTP
ports. This is required as PTP listens on ports < 1024 and thus
requires special privileges. Once this helper process is started, the
main process will synchronize to all PTP domains that are detected on
the selected interfaces.

gst_ptp_clock_new() then allows to create a GstClock that provides the
PTP time from a master clock inside a specific PTP domain. This clock
will only return valid timestamps once the timestamps in the PTP domain
are known. To check this, the GstPtpClock::internal-clock property and
the related notify::clock signal can be used. Once the internal clock
is not NULL, the PTP domain's time is known. Alternatively you can wait
for this with gst_ptp_clock_wait_ready().

To gather statistics about the PTP clock synchronization,
gst_ptp_statistics_callback_add() can be used. This gives the
application the possibility to collect all kinds of statistics
from the clock synchronization.

https://bugzilla.gnome.org/show_bug.cgi?id=749391
2015-06-03 13:55:28 +02:00
..
base queuearray: remove duplicate assignment 2015-05-30 12:40:44 +01:00
check check: optionally check env var for us to make sure test env is set up 2015-04-23 15:54:08 +01:00
controller timedvaluecontrolsource: Check that the only iter is the end iter in the GSequence 2015-05-16 13:08:06 +02:00
helpers ptp: Initial implementation of a PTP clock 2015-06-03 13:55:28 +02:00
net ptp: Initial implementation of a PTP clock 2015-06-03 13:55:28 +02:00
Makefile.am Remove obsolete Android build cruft 2015-04-26 17:49:44 +01:00