|
|
|
GStreamer 1.0 Library Reference Manual | |
|---|---|---|---|---|
| Top | Description | Object Hierarchy | Properties | ||||
#include <gst/net/gstnet.h> struct GstNetClientClock; typedef GstNtpClock; GstClock * gst_net_client_clock_new (const gchar *name,const gchar *remote_address,gint remote_port,GstClockTime base_time); GstClock * gst_ntp_clock_new (const gchar *name,const gchar *remote_address,gint remote_port,GstClockTime base_time);
GObject
+----GInitiallyUnowned
+----GstObject
+----GstClock
+----GstSystemClock
+----GstNetClientClock
+----GstNtpClock
GObject
+----GInitiallyUnowned
+----GstObject
+----GstClock
+----GstSystemClock
+----GstNetClientClock
+----GstNtpClock
"address" gchar* : Read / Write / Construct "base-time" guint64 : Read / Write / Construct Only "bus" GstBus* : Read / Write "internal-clock" GstClock* : Read "minimum-update-interval" guint64 : Read / Write "port" gint : Read / Write / Construct "round-trip-limit" guint64 : Read / Write
GstNetClientClock implements a custom GstClock that synchronizes its time to a remote time provider such as GstNetTimeProvider. GstNtpClock implements a GstClock that synchronizes its time to a remote NTPv4 server.
A new clock is created with gst_net_client_clock_new() or
gst_ntp_clock_new(), which takes the address and port of the remote time
provider along with a name and an initial time.
This clock will poll the time provider and will update its calibration parameters based on the local and remote observations.
The "round-trip" property limits the maximum round trip packets can take.
Various parameters of the clock can be configured with the parent GstClock "timeout", "window-size" and "window-threshold" object properties.
A GstNetClientClock and GstNtpClock is typically set on a GstPipeline with
gst_pipeline_use_clock().
If you set a GstBus on the clock via the "bus" object property, it will
send GST_MESSAGE_ELEMENT messages with an attached GstStructure containing
statistics about clock accuracy and network traffic.
GstClock * gst_net_client_clock_new (const gchar *name,const gchar *remote_address,gint remote_port,GstClockTime base_time);
Create a new GstNetClientInternalClock that will report the time
provided by the GstNetTimeProvider on remote_address and
remote_port.
|
a name for the clock |
|
the address or hostname of the remote clock provider |
|
the port of the remote clock provider |
|
initial time of the clock |
Returns : |
a new GstClock that receives a time from the remote clock. |
GstClock * gst_ntp_clock_new (const gchar *name,const gchar *remote_address,gint remote_port,GstClockTime base_time);
Create a new GstNtpClock that will report the time provided by
the NTPv4 server on remote_address and remote_port.
|
a name for the clock |
|
the address or hostname of the remote clock provider |
|
the port of the remote clock provider |
|
initial time of the clock |
Returns : |
a new GstClock that receives a time from the remote clock. |
Since 1.6
"address" property "address" gchar* : Read / Write / Construct
The IP address of the machine providing a time server.
Default value: "127.0.0.1"
"base-time" property "base-time" guint64 : Read / Write / Construct Only
Initial time that is reported before synchronization.
Default value: 0
"internal-clock" property"internal-clock" GstClock* : Read
Internal clock that directly slaved to the remote clock.
"minimum-update-interval" property "minimum-update-interval" guint64 : Read / Write
Minimum polling interval for packets, in nanoseconds(0 = no limit).
Default value: 50000000
"port" property "port" gint : Read / Write / Construct
The port on which the remote server is listening.
Allowed values: [0,65535]
Default value: 5637