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xvimagesink: 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
xvimagesink with handle-events=false and handle-expose=false then we can avoid
the extra thread.
This commit is contained in:
Stefan Kost 2009-09-15 15:26:06 +03:00
parent a27f439ab3
commit 99b4483b8c
1 changed files with 46 additions and 8 deletions
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54
sys/xvimage/xvimagesink.c
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@ -1164,6 +1164,8 @@ gst_xvimagesink_handle_xevents (GstXvImageSink * xvimagesink)
g_return_if_fail (GST_IS_XVIMAGESINK (xvimagesink));
/* Handle Interaction, produces navigation events */
/* We get all pointer motion events, only the last position is
interesting. */
g_mutex_lock (xvimagesink->flow_lock);
@ -1632,7 +1634,8 @@ gst_xvimagesink_event_thread (GstXvImageSink * xvimagesink)
if (xvimagesink->xwindow) {
gst_xvimagesink_handle_xevents (xvimagesink);
}
g_usleep (50000);
/* FIXME: do we want to align this with the framerate or anything else? */
g_usleep (G_USEC_PER_SEC / 20);
GST_OBJECT_LOCK (xvimagesink);
}
@ -1641,6 +1644,45 @@ gst_xvimagesink_event_thread (GstXvImageSink * xvimagesink)
return NULL;
}
static void
gst_xvimagesink_manage_event_thread (GstXvImageSink * xvimagesink)
{
GThread *thread = NULL;
/* don't start the thread too early */
if (xvimagesink->xcontext == NULL) {
return;
}
GST_OBJECT_LOCK (xvimagesink);
if (xvimagesink->handle_expose || xvimagesink->handle_events) {
if (!xvimagesink->event_thread) {
/* Setup our event listening thread */
GST_DEBUG_OBJECT (xvimagesink, "run xevent thread, expose %d, events %d",
xvimagesink->handle_expose, xvimagesink->handle_events);
xvimagesink->running = TRUE;
xvimagesink->event_thread = g_thread_create (
(GThreadFunc) gst_xvimagesink_event_thread, xvimagesink, TRUE, NULL);
}
} else {
if (xvimagesink->event_thread) {
GST_DEBUG_OBJECT (xvimagesink, "stop xevent thread, expose %d, events %d",
xvimagesink->handle_expose, xvimagesink->handle_events);
xvimagesink->running = FALSE;
/* grab thread and mark it as NULL */
thread = xvimagesink->event_thread;
xvimagesink->event_thread = NULL;
}
}
GST_OBJECT_UNLOCK (xvimagesink);
/* 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
@ -1869,13 +1911,6 @@ gst_xvimagesink_xcontext_get (GstXvImageSink * xvimagesink)
g_mutex_unlock (xvimagesink->x_lock);
/* Setup our event listening thread */
GST_OBJECT_LOCK (xvimagesink);
xvimagesink->running = TRUE;
xvimagesink->event_thread = g_thread_create (
(GThreadFunc) gst_xvimagesink_event_thread, xvimagesink, TRUE, NULL);
GST_OBJECT_UNLOCK (xvimagesink);
return xcontext;
}
@ -2252,6 +2287,7 @@ gst_xvimagesink_change_state (GstElement * element, GstStateChange transition)
xvimagesink->synchronous ? "TRUE" : "FALSE");
XSynchronize (xvimagesink->xcontext->disp, xvimagesink->synchronous);
gst_xvimagesink_update_colorbalance (xvimagesink);
gst_xvimagesink_manage_event_thread (xvimagesink);
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
g_mutex_lock (xvimagesink->pool_lock);
@ -3127,12 +3163,14 @@ gst_xvimagesink_set_property (GObject * object, guint prop_id,
case ARG_HANDLE_EVENTS:
gst_xvimagesink_set_event_handling (GST_X_OVERLAY (xvimagesink),
g_value_get_boolean (value));
gst_xvimagesink_manage_event_thread (xvimagesink);
break;
case ARG_DEVICE:
xvimagesink->adaptor_no = atoi (g_value_get_string (value));
break;
case ARG_HANDLE_EXPOSE:
xvimagesink->handle_expose = g_value_get_boolean (value);
gst_xvimagesink_manage_event_thread (xvimagesink);
break;
case ARG_DOUBLE_BUFFER:
xvimagesink->double_buffer = g_value_get_boolean (value);