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ximagesink: only start event thread if needed

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The event thread is doing 20 wakeups per second to poll the events. If one
runs ximagesink with handle-events=false and handle-expose=false then we can
avoid the extra thread.
This commit is contained in:
Stefan Kost 2009-10-07 17:45:33 +03:00
parent 2021791b75
commit 1e004cd363
1 changed files with 44 additions and 8 deletions
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52
sys/ximage/ximagesink.c
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@ -1139,7 +1139,8 @@ gst_ximagesink_event_thread (GstXImageSink * ximagesink)
if (ximagesink->xwindow) {
gst_ximagesink_handle_xevents (ximagesink);
}
g_usleep (100000);
/* FIXME: do we want to align this with the framerate or anything else? */
g_usleep (G_USEC_PER_SEC / 20);
GST_OBJECT_LOCK (ximagesink);
}
@ -1148,6 +1149,45 @@ gst_ximagesink_event_thread (GstXImageSink * ximagesink)
return NULL;
}
static void
gst_ximagesink_manage_event_thread (GstXImageSink * ximagesink)
{
GThread *thread = NULL;
/* don't start the thread too early */
if (ximagesink->xcontext == NULL) {
return;
}
GST_OBJECT_LOCK (ximagesink);
if (ximagesink->handle_expose || ximagesink->handle_events) {
if (!ximagesink->event_thread) {
/* Setup our event listening thread */
GST_DEBUG_OBJECT (ximagesink, "run xevent thread, expose %d, events %d",
ximagesink->handle_expose, ximagesink->handle_events);
ximagesink->running = TRUE;
ximagesink->event_thread = g_thread_create (
(GThreadFunc) gst_ximagesink_event_thread, ximagesink, TRUE, NULL);
}
} else {
if (ximagesink->event_thread) {
GST_DEBUG_OBJECT (ximagesink, "stop xevent thread, expose %d, events %d",
ximagesink->handle_expose, ximagesink->handle_events);
ximagesink->running = FALSE;
/* grab thread and mark it as NULL */
thread = ximagesink->event_thread;
ximagesink->event_thread = NULL;
}
}
GST_OBJECT_UNLOCK (ximagesink);
/* Wait for our event thread to finish */
if (thread)
g_thread_join (thread);
}
/* This function calculates the pixel aspect ratio based on the properties
* in the xcontext structure and stores it there. */
static void
@ -1328,13 +1368,6 @@ gst_ximagesink_xcontext_get (GstXImageSink * ximagesink)
g_mutex_unlock (ximagesink->x_lock);
/* Setup our event listening thread */
GST_OBJECT_LOCK (ximagesink);
ximagesink->running = TRUE;
ximagesink->event_thread = g_thread_create (
(GThreadFunc) gst_ximagesink_event_thread, ximagesink, TRUE, NULL);
GST_OBJECT_UNLOCK (ximagesink);
return xcontext;
}
@ -1564,6 +1597,7 @@ gst_ximagesink_change_state (GstElement * element, GstStateChange transition)
g_mutex_lock (ximagesink->x_lock);
XSynchronize (ximagesink->xcontext->disp, ximagesink->synchronous);
g_mutex_unlock (ximagesink->x_lock);
gst_ximagesink_manage_event_thread (ximagesink);
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
g_mutex_lock (ximagesink->flow_lock);
@ -2130,9 +2164,11 @@ gst_ximagesink_set_property (GObject * object, guint prop_id,
case PROP_HANDLE_EVENTS:
gst_ximagesink_set_event_handling (GST_X_OVERLAY (ximagesink),
g_value_get_boolean (value));
gst_ximagesink_manage_event_thread (ximagesink);
break;
case PROP_HANDLE_EXPOSE:
ximagesink->handle_expose = g_value_get_boolean (value);
gst_ximagesink_manage_event_thread (ximagesink);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);