Clock

Object Hierarchy:

Description:

public abstract class Clock : Object

GStreamer clock class. Override the vmethods to implement the clock functionality.

All known sub-classes:

SystemClock

Namespace: Gst

Package: gstreamer-0.10

Content:

Properties:

public bool stats { set; get; }
public uint64 timeout { set; get; }
public int window_size { set; get; }
public int window_threshold { set; get; }

Creation methods:

protected Clock ()

Methods:

public bool add_observation (ClockTime slave, ClockTime master, out double r_squared)
The time master of the master clock and the time slave of the slave clock are added to the list of observations. If enough observations are available, a linear regression algorithm is run on the observations and clock is recalibrated. If this functions returns true, r_squared will contain the correlation coefficient of the interpolation. A value of 1.0 means a perfect regression was performed. This value can be used to control the sampling frequency of the master and slave clocks. regression algorithm. MT safe.
public ClockTime adjust_unlocked (ClockTime internal)
Converts the given internal clock time to the external time, adjusting for the rate and reference time set with set_calibration and making sure that the returned time is increasing. This function should be called with the clock's OBJECT_LOCK held and is mainly used by clock subclasses. This function is the reverse of unadjust_unlocked.
public virtual ClockTime change_resolution (ClockTime old_resolution, ClockTime new_resolution)
public void get_calibration (out ClockTime internal, out ClockTime external, out ClockTime rate_num, out ClockTime rate_denom)
Gets the internal rate and reference time of clock. See set_calibration for more information. caller is not interested in the values. MT safe.
public virtual ClockTime get_internal_time ()
Gets the current internal time of the given clock. The time is returned unadjusted for the offset and the rate. given invalid input. MT safe.
public Clock? get_master ()
Get the master clock that clock is slaved to or null when the clock is not slaved to any master clock. not slaved to a master clock. Unref after usage. MT safe.
public virtual ClockTime get_resolution ()
Get the accuracy of the clock. The accuracy of the clock is the granularity of the values returned by get_time. MT safe.
public ClockTime get_time ()
Gets the current time of the given clock. The time is always monotonically increasing and adjusted according to the current offset and rate. given invalid input. MT safe.
public bool periodic_id_reinit (ClockID id, ClockTime start_time, ClockTime interval)
Reinitializes the provided periodic id to the provided start time and interval. Does not modify the reference count.
public void set_calibration (ClockTime internal, ClockTime external, ClockTime rate_num, ClockTime rate_denom)
Adjusts the rate and time of clock. A rate of 1/1 is the normal speed of the clock. Values bigger than 1/1 make the clock go faster. get_time should have been external at internal time internal. This internal time should not be in the future; that is, it should be less than the value of get_internal_time when this function is called. Subsequent calls to get_time will return clock times computed as follows:
public bool set_master (Clock? master)
Set master as the master clock for clock. clock will be automatically calibrated so that get_time reports the same time as the master clock. A clock provider that slaves its clock to a master can get the current calibration values with get_calibration. however keep reporting its time adjusted with the last configured rate and time offsets. Trying to set a master on a clock without the CAN_SET_MASTER flag will make this function return false. MT safe.
public ClockTime set_resolution (ClockTime resolution)
Set the accuracy of the clock. Some clocks have the possibility to operate with different accuracy at the expense of more resource usage. There is normally no need to change the default resolution of a clock. The resolution of a clock can only be changed if the clock has the CAN_SET_RESOLUTION flag set.
public bool single_shot_id_reinit (ClockID id, ClockTime time)
Reinitializes the provided single shot id to the provided time. Does not modify the reference count.
public ClockTime unadjust_unlocked (ClockTime external)
Converts the given external clock time to the internal time of clock, using the rate and reference time set with set_calibration. This function should be called with the clock's OBJECT_LOCK held and is mainly used by clock subclasses. This function is the reverse of adjust_unlocked.
public virtual void unschedule (ClockEntry entry)
public virtual ClockReturn wait (ClockEntry entry)
public virtual ClockReturn wait_async (ClockEntry entry)
public virtual ClockReturn wait_jitter (ClockEntry entry, out ClockTimeDiff jitter)

Fields:

public weak ClockID clockid
public unowned List<ClockEntry> entries
public unowned Cond entries_changed
public ClockTime external_calibration
public bool filling
public ClockTime internal_calibration
public ClockTime last_time
public weak Clock master
public ClockTime rate_denominator
public ClockTime rate_numerator
public ClockTime resolution
public unowned Mutex slave_lock
public int time_index
public weak ClockTime[] times