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; }