/**
* SECTION:gstclock
+ * @title: GstClock
* @short_description: Abstract class for global clocks
* @see_also: #GstSystemClock, #GstPipeline
*
* for unreffing the ids itself. This holds for both periodic and single shot
* notifications. The reason being that the owner of the #GstClockID has to
* keep a handle to the #GstClockID to unblock the wait on FLUSHING events or
- * state changes and if the entry would be unreffed automatically, the handle
+ * state changes and if the entry would be unreffed automatically, the handle
* might become invalid without any notification.
*
* These clock operations do not operate on the running time, so the callbacks
* plugins that have an internal clock but must operate with another clock
* selected by the #GstPipeline. They can track the offset and rate difference
* of their internal clock relative to the master clock by using the
- * gst_clock_get_calibration() function.
+ * gst_clock_get_calibration() function.
*
* The master/slave synchronisation can be tuned with the #GstClock:timeout,
* #GstClock:window-size and #GstClock:window-threshold properties.
gint time_index;
GstClockTime timeout;
GstClockTime *times;
+ GstClockTime *times_temp;
GstClockID clockid;
gint pre_count;
* @jitter: (out) (allow-none): a pointer that will contain the jitter,
* can be %NULL.
*
- * Perform a blocking wait on @id.
+ * Perform a blocking wait on @id.
* @id should have been created with gst_clock_new_single_shot_id()
* or gst_clock_new_periodic_id() and should not have been unscheduled
- * with a call to gst_clock_id_unschedule().
+ * with a call to gst_clock_id_unschedule().
*
* If the @jitter argument is not %NULL and this function returns #GST_CLOCK_OK
* or #GST_CLOCK_EARLY, it will contain the difference
* against the clock and the time of @id when this method was
- * called.
+ * called.
* Positive values indicate how late @id was relative to the clock
- * (in which case this function will return #GST_CLOCK_EARLY).
- * Negative values indicate how much time was spent waiting on the clock
+ * (in which case this function will return #GST_CLOCK_EARLY).
+ * Negative values indicate how much time was spent waiting on the clock
* before this function returned.
*
* Returns: the result of the blocking wait. #GST_CLOCK_EARLY will be returned
- * if the current clock time is past the time of @id, #GST_CLOCK_OK if
- * @id was scheduled in time. #GST_CLOCK_UNSCHEDULED if @id was
+ * if the current clock time is past the time of @id, #GST_CLOCK_OK if
+ * @id was scheduled in time. #GST_CLOCK_UNSCHEDULED if @id was
* unscheduled with gst_clock_id_unschedule().
*
* MT safe.
priv->time_index = 0;
priv->timeout = DEFAULT_TIMEOUT;
priv->times = g_new0 (GstClockTime, 4 * priv->window_size);
+ priv->times_temp = priv->times + 2 * priv->window_size;
/* clear floating flag */
gst_object_ref_sink (clock);
}
g_free (clock->priv->times);
clock->priv->times = NULL;
+ clock->priv->times_temp = NULL;
GST_CLOCK_SLAVE_UNLOCK (clock);
g_mutex_clear (&clock->priv->slave_lock);
* @internal: a reference internal time
* @external: a reference external time
* @rate_num: the numerator of the rate of the clock relative to its
- * internal time
+ * internal time
* @rate_denom: the denominator of the rate of the clock
*
* Adjusts the rate and time of @clock. A rate of 1/1 is the normal speed of
* Subsequent calls to gst_clock_get_time() will return clock times computed as
* follows:
*
- * <programlisting>
+ * |[
* time = (internal_time - internal) * rate_num / rate_denom + external
- * </programlisting>
+ * ]|
*
* This formula is implemented in gst_clock_adjust_unlocked(). Of course, it
* tries to do the integer arithmetic as precisely as possible.
/**
* gst_clock_get_calibration:
- * @clock: a #GstClock
+ * @clock: a #GstClock
* @internal: (out) (allow-none): a location to store the internal time
* @external: (out) (allow-none): a location to store the external time
* @rate_num: (out) (allow-none): a location to store the rate numerator
/**
* gst_clock_set_master:
- * @clock: a #GstClock
- * @master: (allow-none): a master #GstClock
+ * @clock: a #GstClock
+ * @master: (allow-none): a master #GstClock
*
* Set @master as the master clock for @clock. @clock will be automatically
* calibrated so that gst_clock_get_time() reports the same time as the
- * master clock.
- *
+ * master clock.
+ *
* A clock provider that slaves its clock to a master can get the current
* calibration values with gst_clock_get_calibration().
*
* @master can be %NULL in which case @clock will not be slaved anymore. It will
- * however keep reporting its time adjusted with the last configured rate
+ * however keep reporting its time adjusted with the last configured rate
* and time offsets.
*
- * Returns: %TRUE if the clock is capable of being slaved to a master clock.
- * Trying to set a master on a clock without the
+ * Returns: %TRUE if the clock is capable of being slaved to a master clock.
+ * Trying to set a master on a clock without the
* #GST_CLOCK_FLAG_CAN_SET_MASTER flag will make this function return %FALSE.
*
* MT safe.
/**
* gst_clock_get_master:
- * @clock: a #GstClock
+ * @clock: a #GstClock
*
* Get the master clock that @clock is slaved to or %NULL when the clock is
* not slaved to any master clock.
/**
* gst_clock_add_observation:
- * @clock: a #GstClock
+ * @clock: a #GstClock
* @slave: a time on the slave
* @master: a time on the master
* @r_squared: (out): a pointer to hold the result
* 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
+ * 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.
*
- * Returns: %TRUE if enough observations were added to run the
+ * Returns: %TRUE if enough observations were added to run the
* regression algorithm.
*
* MT safe.
"adding observation slave %" GST_TIME_FORMAT ", master %" GST_TIME_FORMAT,
GST_TIME_ARGS (slave), GST_TIME_ARGS (master));
- priv->times[(4 * priv->time_index)] = slave;
- priv->times[(4 * priv->time_index) + 2] = master;
+ priv->times[(2 * priv->time_index)] = slave;
+ priv->times[(2 * priv->time_index) + 1] = master;
priv->time_index++;
if (G_UNLIKELY (priv->time_index == priv->window_size)) {
goto filling;
n = priv->filling ? priv->time_index : priv->window_size;
- if (!_priv_gst_do_linear_regression (priv->times, n, &m_num, &m_denom, &b,
- &xbase, r_squared))
+ if (!gst_calculate_linear_regression (priv->times, priv->times_temp, n,
+ &m_num, &m_denom, &b, &xbase, r_squared))
goto invalid;
GST_CLOCK_SLAVE_UNLOCK (clock);
priv->window_size = g_value_get_int (value);
priv->window_threshold = MIN (priv->window_threshold, priv->window_size);
priv->times = g_renew (GstClockTime, priv->times, 4 * priv->window_size);
+ priv->times_temp = priv->times + 2 * priv->window_size;
/* restart calibration */
priv->filling = TRUE;
priv->time_index = 0;
*
* For asynchronous waiting, the GstClock::synced signal can be used.
*
- *
* This returns immediately with TRUE if GST_CLOCK_FLAG_NEEDS_STARTUP_SYNC
* is not set on the clock, or if the clock is already synced.
*
projects / platform / upstream / gstreamer.git / blobdiff