static GstClockReturn
_wait (GstClock * clock, GstClockEntry * entry, GstClockTimeDiff * jitter)
{
GstCpuThrottlingClock *self = GST_CPU_THROTTLING_CLOCK (clock);
if (!self->priv->evaluate_wait_time) {
if (!(self->priv->sclock)) {
GST_ERROR_OBJECT (clock, "Could not find any system clock"
" to start the wait time evaluation task");
} else {
self->priv->evaluate_wait_time =
gst_clock_new_periodic_id (self->priv->sclock,
gst_clock_get_time (self->priv->sclock),
self->priv->time_between_evals);
gst_clock_id_wait_async (self->priv->evaluate_wait_time,
(GstClockCallback) gst_transcoder_adjust_wait_time,
(gpointer) self, NULL);
}
}
if (G_UNLIKELY (GST_CLOCK_ENTRY_STATUS (entry) == GST_CLOCK_UNSCHEDULED))
return GST_CLOCK_UNSCHEDULED;
if (gst_poll_wait (self->priv->timer, self->priv->current_wait_time)) {
GST_INFO_OBJECT (self, "Something happened on the poll");
}
return GST_CLOCK_ENTRY_STATUS (entry);
}
/**
* gst_clock_set_master:
* @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.
*
* 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
* 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
* #GST_CLOCK_FLAG_CAN_SET_MASTER flag will make this function return %FALSE.
*
* MT safe.
*/
gboolean
gst_clock_set_master (GstClock * clock, GstClock * master)
{
GstClock **master_p;
GstClockPrivate *priv;
g_return_val_if_fail (GST_IS_CLOCK (clock), FALSE);
g_return_val_if_fail (master != clock, FALSE);
GST_OBJECT_LOCK (clock);
/* we always allow setting the master to NULL */
if (master && !GST_OBJECT_FLAG_IS_SET (clock, GST_CLOCK_FLAG_CAN_SET_MASTER))
goto not_supported;
GST_CAT_DEBUG_OBJECT (GST_CAT_CLOCK, clock,
"slaving %p to master clock %p", clock, master);
GST_OBJECT_UNLOCK (clock);
priv = clock->priv;
GST_CLOCK_SLAVE_LOCK (clock);
if (priv->clockid) {
gst_clock_id_unschedule (priv->clockid);
gst_clock_id_unref (priv->clockid);
priv->clockid = NULL;
}
if (master) {
priv->filling = TRUE;
priv->time_index = 0;
/* use the master periodic id to schedule sampling and
* clock calibration. */
priv->clockid = gst_clock_new_periodic_id (master,
gst_clock_get_time (master), priv->timeout);
gst_clock_id_wait_async (priv->clockid,
(GstClockCallback) gst_clock_slave_callback,
gst_object_ref (clock), (GDestroyNotify) gst_object_unref);
}
GST_CLOCK_SLAVE_UNLOCK (clock);
GST_OBJECT_LOCK (clock);
master_p = &priv->master;
gst_object_replace ((GstObject **) master_p, (GstObject *) master);
GST_OBJECT_UNLOCK (clock);
return TRUE;
/* ERRORS */
not_supported:
{
GST_CAT_DEBUG_OBJECT (GST_CAT_CLOCK, clock,
"cannot be slaved to a master clock");
GST_OBJECT_UNLOCK (clock);
return FALSE;
}
}
/*
* Class method: new(clock, time, interval=nil)
* clock: a Gst::Clock.
* time: a time period, in nanoseconds.
* interval: an interval period, in nanoseconds.
*
* Creates a new Gst::ClockEntry object based on the given Gst::Clock.
*
* Two types of Gst::ClockEntry objects can be created:
*
* * One-shot: if the interval is ommited or nil, the entry will trigger a single shot notification, at the requested time (in nanoseconds);
* * Periodic: if the interval is not nil, the timer entry will trigger a periodic notification, starting at time (in nanoseconds), and be fired with the given interval (also in nanoseconds).
*
* The timer will be issued after Gst::ClockEntry#wait or
* Gst::ClockEntry#wait_async.
*
* Returns: a new Gst::ClockEntry object.
*/
static VALUE
rg_initialize (int argc, VALUE * argv, VALUE self)
{
VALUE clock, time, interval;
GstClockID id;
rb_scan_args (argc, argv, "21", &clock, &time, &interval);
/*
* Single-shot
*/
if (NIL_P (interval))
id = gst_clock_new_single_shot_id (RVAL2GST_CLOCK (clock), NUM2ULL (time));
/*
* Periodic
*/
else
id = gst_clock_new_periodic_id (RVAL2GST_CLOCK (clock),
NUM2ULL (time), NUM2ULL (interval));
G_INITIALIZE (self, GST_CLOCK_ENTRY (id));
return Qnil;
}
