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basesink: Re-using GstClockID instead of constantly recreating one

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Makes _sink_wait_clock at least 2 times faster.

https://bugzilla.gnome.org/show_bug.cgi?id=632778
This commit is contained in:
Edward Hervey 2010-10-20 17:41:28 +02:00
parent b4285611ad
commit ece40dacbc
1 changed files with 15 additions and 5 deletions
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20
libs/gst/base/gstbasesink.c
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@ -256,6 +256,9 @@ struct _GstBaseSinkPrivate
/* we have a pending and a current step operation */
GstStepInfo current_step;
GstStepInfo pending_step;
/* Cached GstClockID */
GstClockID cached_clock_id;
};
#define DO_RUNNING_AVG(avg,val,size) (((val) + ((size)-1) * (avg)) / (size))
@ -683,6 +686,7 @@ gst_base_sink_init (GstBaseSink * basesink, gpointer g_class)
priv->ts_offset = DEFAULT_TS_OFFSET;
priv->render_delay = DEFAULT_RENDER_DELAY;
priv->blocksize = DEFAULT_BLOCKSIZE;
priv->cached_clock_id = NULL;
g_atomic_int_set (&priv->enable_last_buffer, DEFAULT_ENABLE_LAST_BUFFER);
GST_OBJECT_FLAG_SET (basesink, GST_ELEMENT_IS_SINK);
@ -2076,7 +2080,6 @@ GstClockReturn
gst_base_sink_wait_clock (GstBaseSink * sink, GstClockTime time,
GstClockTimeDiff * jitter)
{
GstClockID id;
GstClockReturn ret;
GstClock *clock;
GstClockTime base_time;
@ -2099,21 +2102,28 @@ gst_base_sink_wait_clock (GstBaseSink * sink, GstClockTime time,
/* add base_time to running_time to get the time against the clock */
time += base_time;
id = gst_clock_new_single_shot_id (clock, time);
/* Re-use existing clockid if available */
if (G_LIKELY (sink->priv->cached_clock_id != NULL)) {
if (!gst_clock_single_shot_id_reinit (clock, sink->priv->cached_clock_id,
time)) {
gst_clock_id_unref (sink->priv->cached_clock_id);
sink->priv->cached_clock_id = gst_clock_new_single_shot_id (clock, time);
}
} else
sink->priv->cached_clock_id = gst_clock_new_single_shot_id (clock, time);
GST_OBJECT_UNLOCK (sink);
/* A blocking wait is performed on the clock. We save the ClockID
* so we can unlock the entry at any time. While we are blocking, we
* release the PREROLL_LOCK so that other threads can interrupt the
* entry. */
sink->clock_id = id;
sink->clock_id = sink->priv->cached_clock_id;
/* release the preroll lock while waiting */
GST_PAD_PREROLL_UNLOCK (sink->sinkpad);
ret = gst_clock_id_wait (id, jitter);
ret = gst_clock_id_wait (sink->priv->cached_clock_id, jitter);
GST_PAD_PREROLL_LOCK (sink->sinkpad);
gst_clock_id_unref (id);
sink->clock_id = NULL;
return ret;