static void
gst_clock_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstClock *clock;
GstClockPrivate *priv;
clock = GST_CLOCK (object);
priv = clock->priv;
switch (prop_id) {
case PROP_WINDOW_SIZE:
GST_CLOCK_SLAVE_LOCK (clock);
g_value_set_int (value, priv->window_size);
GST_CLOCK_SLAVE_UNLOCK (clock);
break;
case PROP_WINDOW_THRESHOLD:
GST_CLOCK_SLAVE_LOCK (clock);
g_value_set_int (value, priv->window_threshold);
GST_CLOCK_SLAVE_UNLOCK (clock);
break;
case PROP_TIMEOUT:
g_value_set_uint64 (value, gst_clock_get_timeout (clock));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_net_client_clock_observe_times (GstNetClientClock * self,
GstClockTime local_1, GstClockTime remote, GstClockTime local_2)
{
GstClockTime current_timeout;
GstClockTime local_avg;
gdouble r_squared;
GstClock *clock;
if (local_2 < local_1)
goto bogus_observation;
local_avg = (local_2 + local_1) / 2;
clock = GST_CLOCK_CAST (self);
if (gst_clock_add_observation (GST_CLOCK (self), local_avg, remote,
&r_squared)) {
/* geto formula */
current_timeout = (1e-3 / (1 - MIN (r_squared, 0.99999))) * GST_SECOND;
current_timeout = MIN (current_timeout, gst_clock_get_timeout (clock));
} else {
current_timeout = 0;
}
GST_INFO ("next timeout: %" GST_TIME_FORMAT, GST_TIME_ARGS (current_timeout));
self->priv->timeout_expiration = gst_util_get_timestamp () + current_timeout;
return;
bogus_observation:
{
GST_WARNING_OBJECT (self, "time packet receive time < send time (%"
GST_TIME_FORMAT " < %" GST_TIME_FORMAT ")", GST_TIME_ARGS (local_1),
GST_TIME_ARGS (local_2));
return;
}
}
static gpointer
gst_net_client_clock_thread (gpointer data)
{
GstNetClientClock *self = data;
GstNetTimePacket *packet;
GSocket *socket = self->priv->socket;
GError *err = NULL;
GstClock *clock = data;
GST_INFO_OBJECT (self, "net client clock thread running, socket=%p", socket);
g_socket_set_blocking (socket, TRUE);
g_socket_set_timeout (socket, 0);
while (!g_cancellable_is_cancelled (self->priv->cancel)) {
GstClockTime expiration_time = self->priv->timeout_expiration;
GstClockTime now = gst_util_get_timestamp ();
gint64 socket_timeout;
if (now >= expiration_time || (expiration_time - now) <= GST_MSECOND) {
socket_timeout = 0;
} else {
socket_timeout = (expiration_time - now) / GST_USECOND;
}
GST_TRACE_OBJECT (self, "timeout: %" G_GINT64_FORMAT "us", socket_timeout);
if (!g_socket_condition_timed_wait (socket, G_IO_IN, socket_timeout,
self->priv->cancel, &err)) {
/* cancelled, timeout or error */
if (err->code == G_IO_ERROR_CANCELLED) {
GST_INFO_OBJECT (self, "cancelled");
g_clear_error (&err);
break;
} else if (err->code == G_IO_ERROR_TIMED_OUT) {
/* timed out, let's send another packet */
GST_DEBUG_OBJECT (self, "timed out");
packet = gst_net_time_packet_new (NULL);
packet->local_time = gst_clock_get_internal_time (GST_CLOCK (self));
GST_DEBUG_OBJECT (self,
"sending packet, local time = %" GST_TIME_FORMAT,
GST_TIME_ARGS (packet->local_time));
gst_net_time_packet_send (packet, self->priv->socket,
self->priv->servaddr, NULL);
g_free (packet);
/* reset timeout (but are expecting a response sooner anyway) */
self->priv->timeout_expiration =
gst_util_get_timestamp () + gst_clock_get_timeout (clock);
} else {
GST_DEBUG_OBJECT (self, "socket error: %s", err->message);
g_usleep (G_USEC_PER_SEC / 10); /* throttle */
}
g_clear_error (&err);
} else {
GstClockTime new_local;
/* got packet */
new_local = gst_clock_get_internal_time (GST_CLOCK (self));
packet = gst_net_time_packet_receive (socket, NULL, &err);
if (packet != NULL) {
GST_LOG_OBJECT (self, "got packet back");
GST_LOG_OBJECT (self, "local_1 = %" GST_TIME_FORMAT,
GST_TIME_ARGS (packet->local_time));
GST_LOG_OBJECT (self, "remote = %" GST_TIME_FORMAT,
GST_TIME_ARGS (packet->remote_time));
GST_LOG_OBJECT (self, "local_2 = %" GST_TIME_FORMAT,
GST_TIME_ARGS (new_local));
/* observe_times will reset the timeout */
gst_net_client_clock_observe_times (self, packet->local_time,
packet->remote_time, new_local);
g_free (packet);
} else if (err != NULL) {
GST_WARNING_OBJECT (self, "receive error: %s", err->message);
g_clear_error (&err);
}
}
}
GST_INFO_OBJECT (self, "shutting down net client clock thread");
return NULL;
}
static gpointer
gst_net_client_clock_thread (gpointer data)
{
GstNetClientClock *self = data;
GstNetTimePacket *packet;
GMainContext *ctx;
GSourceFuncs funcs = { NULL, };
GSource *source;
GIOCondition cond;
gboolean timeout;
GSocket *socket = self->priv->socket;
GError *err = NULL;
GstClock *clock = data;
GST_INFO_OBJECT (self, "net client clock thread running, socket=%p", socket);
g_socket_set_blocking (socket, TRUE);
g_socket_set_timeout (socket, 0);
ctx = g_main_context_new ();
source = g_socket_create_source (socket, G_IO_IN, self->priv->cancel);
g_source_set_name (source, "GStreamer net client clock thread socket");
g_source_set_callback (source, (GSourceFunc) gst_net_client_clock_socket_cb,
&cond, NULL);
g_source_attach (source, ctx);
g_source_unref (source);
/* GSocket only support second granularity for timeouts, so roll our own
* timeout source (so we don't have to create a new source whenever the
* timeout changes, as we would have to do with the default timeout source) */
funcs.prepare = gst_net_client_clock_timeout_source_prepare;
funcs.check = gst_net_client_clock_timeout_source_check;
funcs.dispatch = gst_net_client_clock_timeout_source_dispatch;
funcs.finalize = NULL;
source = g_source_new (&funcs, sizeof (GstNetClientClockTimeoutSource));
((GstNetClientClockTimeoutSource *) source)->clock = self;
((GstNetClientClockTimeoutSource *) source)->p_timeout = &timeout;
g_source_set_name (source, "GStreamer net client clock timeout");
g_source_attach (source, ctx);
g_source_unref (source);
while (!g_cancellable_is_cancelled (self->priv->cancel)) {
cond = 0;
timeout = FALSE;
g_main_context_iteration (ctx, TRUE);
if (g_cancellable_is_cancelled (self->priv->cancel))
break;
if (timeout) {
/* timed out, let's send another packet */
GST_DEBUG_OBJECT (self, "timed out");
packet = gst_net_time_packet_new (NULL);
packet->local_time = gst_clock_get_internal_time (GST_CLOCK (self));
GST_DEBUG_OBJECT (self, "sending packet, local time = %" GST_TIME_FORMAT,
GST_TIME_ARGS (packet->local_time));
gst_net_time_packet_send (packet, self->priv->socket,
self->priv->servaddr, NULL);
g_free (packet);
/* reset timeout (but are expecting a response sooner anyway) */
self->priv->timeout_expiration =
gst_util_get_timestamp () + gst_clock_get_timeout (clock);
continue;
}
/* got data to read? */
if ((cond & G_IO_IN)) {
GstClockTime new_local;
new_local = gst_clock_get_internal_time (GST_CLOCK (self));
packet = gst_net_time_packet_receive (socket, NULL, &err);
if (err != NULL) {
GST_WARNING_OBJECT (self, "receive error: %s", err->message);
g_error_free (err);
err = NULL;
continue;
}
GST_LOG_OBJECT (self, "got packet back");
GST_LOG_OBJECT (self, "local_1 = %" GST_TIME_FORMAT,
GST_TIME_ARGS (packet->local_time));
GST_LOG_OBJECT (self, "remote = %" GST_TIME_FORMAT,
GST_TIME_ARGS (packet->remote_time));
GST_LOG_OBJECT (self, "local_2 = %" GST_TIME_FORMAT,
GST_TIME_ARGS (new_local));
/* observe_times will reset the timeout */
gst_net_client_clock_observe_times (self, packet->local_time,
packet->remote_time, new_local);
g_free (packet);
continue;
}
if ((cond & (G_IO_ERR | G_IO_HUP))) {
GST_DEBUG_OBJECT (self, "socket error?! %s", g_strerror (errno));
g_usleep (G_USEC_PER_SEC / 10);
continue;
}
}
GST_INFO_OBJECT (self, "shutting down net client clock thread");
g_main_context_unref (ctx);
return NULL;
}
static gpointer
gst_net_client_internal_clock_thread (gpointer data)
{
GstNetClientInternalClock *self = data;
GSocket *socket = self->socket;
GError *err = NULL;
GST_INFO_OBJECT (self, "net client clock thread running, socket=%p", socket);
g_socket_set_blocking (socket, TRUE);
g_socket_set_timeout (socket, 0);
while (!g_cancellable_is_cancelled (self->cancel)) {
GstClockTime expiration_time = self->timeout_expiration;
GstClockTime now = gst_util_get_timestamp ();
gint64 socket_timeout;
if (now >= expiration_time || (expiration_time - now) <= GST_MSECOND) {
socket_timeout = 0;
} else {
socket_timeout = (expiration_time - now) / GST_USECOND;
}
GST_TRACE_OBJECT (self, "timeout: %" G_GINT64_FORMAT "us", socket_timeout);
if (!g_socket_condition_timed_wait (socket, G_IO_IN, socket_timeout,
self->cancel, &err)) {
/* cancelled, timeout or error */
if (err->code == G_IO_ERROR_CANCELLED) {
GST_INFO_OBJECT (self, "cancelled");
g_clear_error (&err);
break;
} else if (err->code == G_IO_ERROR_TIMED_OUT) {
/* timed out, let's send another packet */
GST_DEBUG_OBJECT (self, "timed out");
if (self->is_ntp) {
GstNtpPacket *packet;
packet = gst_ntp_packet_new (NULL, NULL);
packet->transmit_time =
gst_clock_get_internal_time (GST_CLOCK_CAST (self));
GST_DEBUG_OBJECT (self,
"sending packet, local time = %" GST_TIME_FORMAT,
GST_TIME_ARGS (packet->transmit_time));
gst_ntp_packet_send (packet, self->socket, self->servaddr, NULL);
g_free (packet);
} else {
GstNetTimePacket *packet;
packet = gst_net_time_packet_new (NULL);
packet->local_time =
gst_clock_get_internal_time (GST_CLOCK_CAST (self));
GST_DEBUG_OBJECT (self,
"sending packet, local time = %" GST_TIME_FORMAT,
GST_TIME_ARGS (packet->local_time));
gst_net_time_packet_send (packet, self->socket, self->servaddr, NULL);
g_free (packet);
}
/* reset timeout (but are expecting a response sooner anyway) */
self->timeout_expiration =
gst_util_get_timestamp () +
gst_clock_get_timeout (GST_CLOCK_CAST (self));
} else {
GST_DEBUG_OBJECT (self, "socket error: %s", err->message);
g_usleep (G_USEC_PER_SEC / 10); /* throttle */
}
g_clear_error (&err);
} else {
GstClockTime new_local;
/* got packet */
new_local = gst_clock_get_internal_time (GST_CLOCK_CAST (self));
if (self->is_ntp) {
GstNtpPacket *packet;
packet = gst_ntp_packet_receive (socket, NULL, &err);
if (packet != NULL) {
GST_LOG_OBJECT (self, "got packet back");
GST_LOG_OBJECT (self, "local_1 = %" GST_TIME_FORMAT,
GST_TIME_ARGS (packet->origin_time));
GST_LOG_OBJECT (self, "remote_1 = %" GST_TIME_FORMAT,
GST_TIME_ARGS (packet->receive_time));
GST_LOG_OBJECT (self, "remote_2 = %" GST_TIME_FORMAT,
GST_TIME_ARGS (packet->transmit_time));
GST_LOG_OBJECT (self, "local_2 = %" GST_TIME_FORMAT,
GST_TIME_ARGS (new_local));
GST_LOG_OBJECT (self, "poll_interval = %" GST_TIME_FORMAT,
GST_TIME_ARGS (packet->poll_interval));
/* Remember the last poll interval we ever got from the server */
if (packet->poll_interval != GST_CLOCK_TIME_NONE)
self->last_remote_poll_interval = packet->poll_interval;
/* observe_times will reset the timeout */
gst_net_client_internal_clock_observe_times (self,
packet->origin_time, packet->receive_time, packet->transmit_time,
new_local);
g_free (packet);
} else if (err != NULL) {
if (g_error_matches (err, GST_NTP_ERROR, GST_NTP_ERROR_WRONG_VERSION)
|| g_error_matches (err, GST_NTP_ERROR, GST_NTP_ERROR_KOD_DENY)) {
GST_ERROR_OBJECT (self, "fatal receive error: %s", err->message);
g_clear_error (&err);
break;
} else if (g_error_matches (err, GST_NTP_ERROR,
GST_NTP_ERROR_KOD_RATE)) {
GST_WARNING_OBJECT (self, "need to limit rate");
/* If the server did not tell us a poll interval before, double
* our minimum poll interval. Otherwise we assume that the server
* already told us something sensible and that this error here
* was just a spurious error */
if (self->last_remote_poll_interval == GST_CLOCK_TIME_NONE)
self->minimum_update_interval *= 2;
/* And wait a bit before we send the next packet instead of
* sending it immediately */
self->timeout_expiration =
gst_util_get_timestamp () +
gst_clock_get_timeout (GST_CLOCK_CAST (self));
} else {
GST_WARNING_OBJECT (self, "receive error: %s", err->message);
}
g_clear_error (&err);
}
} else {
GstNetTimePacket *packet;
packet = gst_net_time_packet_receive (socket, NULL, &err);
if (packet != NULL) {
GST_LOG_OBJECT (self, "got packet back");
GST_LOG_OBJECT (self, "local_1 = %" GST_TIME_FORMAT,
GST_TIME_ARGS (packet->local_time));
GST_LOG_OBJECT (self, "remote = %" GST_TIME_FORMAT,
GST_TIME_ARGS (packet->remote_time));
GST_LOG_OBJECT (self, "local_2 = %" GST_TIME_FORMAT,
GST_TIME_ARGS (new_local));
/* observe_times will reset the timeout */
gst_net_client_internal_clock_observe_times (self, packet->local_time,
packet->remote_time, packet->remote_time, new_local);
g_free (packet);
} else if (err != NULL) {
GST_WARNING_OBJECT (self, "receive error: %s", err->message);
g_clear_error (&err);
}
}
}
}
GST_INFO_OBJECT (self, "shutting down net client clock thread");
return NULL;
}
static void
gst_net_client_internal_clock_observe_times (GstNetClientInternalClock * self,
GstClockTime local_1, GstClockTime remote_1, GstClockTime remote_2,
GstClockTime local_2)
{
GstClockTime current_timeout = 0;
GstClockTime local_avg, remote_avg;
gdouble r_squared;
GstClock *clock;
GstClockTime rtt, rtt_limit, min_update_interval;
/* Use for discont tracking */
GstClockTime time_before = 0;
GstClockTime min_guess = 0;
GstClockTimeDiff time_discont = 0;
gboolean synched, now_synched;
GstClockTime internal_time, external_time, rate_num, rate_den;
GstClockTime orig_internal_time, orig_external_time, orig_rate_num,
orig_rate_den;
GstClockTime max_discont;
GstClockTime last_rtts[MEDIAN_PRE_FILTERING_WINDOW];
GstClockTime median;
gint i;
GST_OBJECT_LOCK (self);
rtt_limit = self->roundtrip_limit;
GST_LOG_OBJECT (self,
"local1 %" G_GUINT64_FORMAT " remote1 %" G_GUINT64_FORMAT " remote2 %"
G_GUINT64_FORMAT " local2 %" G_GUINT64_FORMAT, local_1, remote_1,
remote_2, local_2);
/* If the server told us a poll interval and it's bigger than the
* one configured via the property, use the server's */
if (self->last_remote_poll_interval != GST_CLOCK_TIME_NONE &&
self->last_remote_poll_interval > self->minimum_update_interval)
min_update_interval = self->last_remote_poll_interval;
else
min_update_interval = self->minimum_update_interval;
GST_OBJECT_UNLOCK (self);
if (local_2 < local_1) {
GST_LOG_OBJECT (self, "Dropping observation: receive time %" GST_TIME_FORMAT
" < send time %" GST_TIME_FORMAT, GST_TIME_ARGS (local_1),
GST_TIME_ARGS (local_2));
goto bogus_observation;
}
if (remote_2 < remote_1) {
GST_LOG_OBJECT (self,
"Dropping observation: remote receive time %" GST_TIME_FORMAT
" < send time %" GST_TIME_FORMAT, GST_TIME_ARGS (remote_1),
GST_TIME_ARGS (remote_2));
goto bogus_observation;
}
/* The round trip time is (assuming symmetric path delays)
* delta = (local_2 - local_1) - (remote_2 - remote_1)
*/
rtt = GST_CLOCK_DIFF (local_1, local_2) - GST_CLOCK_DIFF (remote_1, remote_2);
if ((rtt_limit > 0) && (rtt > rtt_limit)) {
GST_LOG_OBJECT (self,
"Dropping observation: RTT %" GST_TIME_FORMAT " > limit %"
GST_TIME_FORMAT, GST_TIME_ARGS (rtt), GST_TIME_ARGS (rtt_limit));
goto bogus_observation;
}
for (i = 1; i < MEDIAN_PRE_FILTERING_WINDOW; i++)
self->last_rtts[i - 1] = self->last_rtts[i];
self->last_rtts[i - 1] = rtt;
if (self->last_rtts_missing) {
self->last_rtts_missing--;
} else {
memcpy (&last_rtts, &self->last_rtts, sizeof (last_rtts));
g_qsort_with_data (&last_rtts,
MEDIAN_PRE_FILTERING_WINDOW, sizeof (GstClockTime),
(GCompareDataFunc) compare_clock_time, NULL);
median = last_rtts[MEDIAN_PRE_FILTERING_WINDOW / 2];
/* FIXME: We might want to use something else here, like only allowing
* things in the interquartile range, or also filtering away delays that
* are too small compared to the median. This here worked well enough
* in tests so far.
*/
if (rtt > 2 * median) {
GST_LOG_OBJECT (self,
"Dropping observation, long RTT %" GST_TIME_FORMAT " > 2 * median %"
GST_TIME_FORMAT, GST_TIME_ARGS (rtt), GST_TIME_ARGS (median));
goto bogus_observation;
}
}
/* Track an average round trip time, for a bit of smoothing */
/* Always update before discarding a sample, so genuine changes in
* the network get picked up, eventually */
if (self->rtt_avg == GST_CLOCK_TIME_NONE)
self->rtt_avg = rtt;
else if (rtt < self->rtt_avg) /* Shorter RTTs carry more weight than longer */
self->rtt_avg = (3 * self->rtt_avg + rtt) / 4;
else
self->rtt_avg = (15 * self->rtt_avg + rtt) / 16;
if (rtt > 2 * self->rtt_avg) {
GST_LOG_OBJECT (self,
"Dropping observation, long RTT %" GST_TIME_FORMAT " > 2 * avg %"
GST_TIME_FORMAT, GST_TIME_ARGS (rtt), GST_TIME_ARGS (self->rtt_avg));
goto bogus_observation;
}
/* The difference between the local and remote clock (again assuming
* symmetric path delays):
*
* local_1 + delta / 2 - remote_1 = theta
* or
* local_2 - delta / 2 - remote_2 = theta
*
* which gives after some simple algebraic transformations:
*
* (remote_1 - local_1) + (remote_2 - local_2)
* theta = -------------------------------------------
* 2
*
*
* Thus remote time at local_avg is equal to:
*
* local_avg + theta =
*
* local_1 + local_2 (remote_1 - local_1) + (remote_2 - local_2)
* ----------------- + -------------------------------------------
* 2 2
*
* =
*
* remote_1 + remote_2
* ------------------- = remote_avg
* 2
*
* We use this for our clock estimation, i.e. local_avg at remote clock
* being the same as remote_avg.
*/
local_avg = (local_2 + local_1) / 2;
remote_avg = (remote_2 + remote_1) / 2;
GST_LOG_OBJECT (self,
"remoteavg %" G_GUINT64_FORMAT " localavg %" G_GUINT64_FORMAT,
remote_avg, local_avg);
clock = GST_CLOCK_CAST (self);
/* Store what the clock produced as 'now' before this update */
gst_clock_get_calibration (GST_CLOCK_CAST (self), &orig_internal_time,
&orig_external_time, &orig_rate_num, &orig_rate_den);
internal_time = orig_internal_time;
external_time = orig_external_time;
rate_num = orig_rate_num;
rate_den = orig_rate_den;
min_guess =
gst_clock_adjust_with_calibration (GST_CLOCK_CAST (self), local_1,
internal_time, external_time, rate_num, rate_den);
time_before =
gst_clock_adjust_with_calibration (GST_CLOCK_CAST (self), local_2,
internal_time, external_time, rate_num, rate_den);
/* Maximum discontinuity, when we're synched with the master. Could make this a property,
* but this value seems to work fine */
max_discont = self->rtt_avg / 4;
/* If the remote observation was within a max_discont window around our min/max estimates, we're synched */
synched =
(GST_CLOCK_DIFF (remote_avg, min_guess) < (GstClockTimeDiff) (max_discont)
&& GST_CLOCK_DIFF (time_before,
remote_avg) < (GstClockTimeDiff) (max_discont));
if (gst_clock_add_observation_unapplied (GST_CLOCK_CAST (self),
local_avg, remote_avg, &r_squared, &internal_time, &external_time,
&rate_num, &rate_den)) {
/* Now compare the difference (discont) in the clock
* after this observation */
time_discont = GST_CLOCK_DIFF (time_before,
gst_clock_adjust_with_calibration (GST_CLOCK_CAST (self), local_2,
internal_time, external_time, rate_num, rate_den));
/* If we were in sync with the remote clock, clamp the allowed
* discontinuity to within quarter of one RTT. In sync means our send/receive estimates
* of remote time correctly windowed the actual remote time observation */
if (synched && ABS (time_discont) > max_discont) {
GstClockTimeDiff offset;
GST_DEBUG_OBJECT (clock,
"Too large a discont, clamping to 1/4 average RTT = %"
GST_TIME_FORMAT, GST_TIME_ARGS (max_discont));
if (time_discont > 0) { /* Too large a forward step - add a -ve offset */
offset = max_discont - time_discont;
if (-offset > external_time)
external_time = 0;
else
external_time += offset;
} else { /* Too large a backward step - add a +ve offset */
offset = -(max_discont + time_discont);
external_time += offset;
}
time_discont += offset;
}
/* Check if the new clock params would have made our observation within range */
now_synched =
(GST_CLOCK_DIFF (remote_avg,
gst_clock_adjust_with_calibration (GST_CLOCK_CAST (self),
local_1, internal_time, external_time, rate_num,
rate_den)) < (GstClockTimeDiff) (max_discont))
&&
(GST_CLOCK_DIFF (gst_clock_adjust_with_calibration
(GST_CLOCK_CAST (self), local_2, internal_time, external_time,
rate_num, rate_den),
remote_avg) < (GstClockTimeDiff) (max_discont));
/* Only update the clock if we had synch or just gained it */
if (synched || now_synched || self->skipped_updates > MAX_SKIPPED_UPDATES) {
gst_clock_set_calibration (GST_CLOCK_CAST (self), internal_time,
external_time, rate_num, rate_den);
/* ghetto formula - shorter timeout for bad correlations */
current_timeout = (1e-3 / (1 - MIN (r_squared, 0.99999))) * GST_SECOND;
current_timeout =
MIN (current_timeout, gst_clock_get_timeout (GST_CLOCK_CAST (self)));
self->skipped_updates = 0;
/* FIXME: When do we consider the clock absolutely not synced anymore? */
gst_clock_set_synced (GST_CLOCK (self), TRUE);
} else {
/* Restore original calibration vars for the report, we're not changing the clock */
internal_time = orig_internal_time;
external_time = orig_external_time;
rate_num = orig_rate_num;
rate_den = orig_rate_den;
time_discont = 0;
self->skipped_updates++;
}
}
/* Limit the polling to at most one per minimum_update_interval */
if (rtt < min_update_interval)
current_timeout = MAX (min_update_interval - rtt, current_timeout);
GST_OBJECT_LOCK (self);
if (self->busses) {
GstStructure *s;
GstMessage *msg;
GList *l;
/* Output a stats message, whether we updated the clock or not */
s = gst_structure_new ("gst-netclock-statistics",
"synchronised", G_TYPE_BOOLEAN, synched,
"rtt", G_TYPE_UINT64, rtt,
"rtt-average", G_TYPE_UINT64, self->rtt_avg,
"local", G_TYPE_UINT64, local_avg,
"remote", G_TYPE_UINT64, remote_avg,
"discontinuity", G_TYPE_INT64, time_discont,
"remote-min-estimate", G_TYPE_UINT64, min_guess,
"remote-max-estimate", G_TYPE_UINT64, time_before,
"remote-min-error", G_TYPE_INT64, GST_CLOCK_DIFF (remote_avg,
min_guess), "remote-max-error", G_TYPE_INT64,
GST_CLOCK_DIFF (remote_avg, time_before), "request-send", G_TYPE_UINT64,
local_1, "request-receive", G_TYPE_UINT64, local_2, "r-squared",
G_TYPE_DOUBLE, r_squared, "timeout", G_TYPE_UINT64, current_timeout,
"internal-time", G_TYPE_UINT64, internal_time, "external-time",
G_TYPE_UINT64, external_time, "rate-num", G_TYPE_UINT64, rate_num,
"rate-den", G_TYPE_UINT64, rate_den, "rate", G_TYPE_DOUBLE,
(gdouble) (rate_num) / rate_den, "local-clock-offset", G_TYPE_INT64,
GST_CLOCK_DIFF (internal_time, external_time), NULL);
msg = gst_message_new_element (GST_OBJECT (self), s);
for (l = self->busses; l; l = l->next)
gst_bus_post (l->data, gst_message_ref (msg));
gst_message_unref (msg);
}
GST_OBJECT_UNLOCK (self);
GST_INFO ("next timeout: %" GST_TIME_FORMAT, GST_TIME_ARGS (current_timeout));
self->timeout_expiration = gst_util_get_timestamp () + current_timeout;
return;
bogus_observation:
/* Schedule a new packet again soon */
self->timeout_expiration = gst_util_get_timestamp () + (GST_SECOND / 4);
return;
}