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autoconvert: Cache events and send them downstream once an element was selected

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This commit is contained in:
Sebastian Dröge 2009-08-09 15:20:48 +02:00
parent abe33a5526
commit cb1f2f2294
2 changed files with 77 additions and 6 deletions
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82
gst/autoconvert/gstautoconvert.c
View file

@ -87,6 +87,9 @@ static void gst_auto_convert_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static void gst_auto_convert_dispose (GObject * object);
static GstStateChangeReturn gst_auto_convert_change_state (GstElement * element,
GstStateChange transition);
static GstElement *gst_auto_convert_get_subelement (GstAutoConvert *
autoconvert);
static GstPad *gst_auto_convert_get_internal_sinkpad (GstAutoConvert *
@ -170,6 +173,7 @@ static void
gst_auto_convert_class_init (GstAutoConvertClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstElementClass *gstelement_class = (GstElementClass *) klass;
gobject_class->dispose = gst_auto_convert_dispose;
@ -183,6 +187,9 @@ gst_auto_convert_class_init (GstAutoConvertClass * klass)
" ownership of the list (NULL means it will go through all possible"
" elements), can only be set once",
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_auto_convert_change_state);
}
static void
@ -233,6 +240,11 @@ gst_auto_convert_dispose (GObject * object)
autoconvert->current_internal_sinkpad = NULL;
autoconvert->current_internal_srcpad = NULL;
}
g_list_foreach (autoconvert->cached_events, (GFunc) gst_mini_object_unref,
NULL);
g_list_free (autoconvert->cached_events);
autoconvert->cached_events = NULL;
GST_OBJECT_UNLOCK (object);
G_OBJECT_CLASS (parent_class)->dispose (object);
@ -279,6 +291,35 @@ gst_auto_convert_get_property (GObject * object,
}
}
static GstStateChangeReturn
gst_auto_convert_change_state (GstElement * element, GstStateChange transition)
{
GstAutoConvert *autoconvert = GST_AUTO_CONVERT (element);
GstStateChangeReturn ret;
switch (transition) {
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE)
return ret;
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
g_list_foreach (autoconvert->cached_events, (GFunc) gst_mini_object_unref,
NULL);
g_list_free (autoconvert->cached_events);
autoconvert->cached_events = NULL;
break;
default:
break;
}
return ret;
}
static GstElement *
gst_auto_convert_get_element_by_type (GstAutoConvert * autoconvert, GType type)
{
@ -890,6 +931,20 @@ gst_auto_convert_sink_chain (GstPad * pad, GstBuffer * buffer)
internal_srcpad = gst_auto_convert_get_internal_srcpad (autoconvert);
if (internal_srcpad) {
GST_OBJECT_LOCK (autoconvert);
if (autoconvert->cached_events) {
GList *l;
GST_DEBUG_OBJECT (autoconvert, "Sending cached events downstream");
autoconvert->cached_events = g_list_reverse (autoconvert->cached_events);
for (l = autoconvert->cached_events; l; l = l->next)
gst_pad_push_event (internal_srcpad, l->data);
g_list_free (autoconvert->cached_events);
autoconvert->cached_events = NULL;
}
GST_OBJECT_UNLOCK (autoconvert);
ret = gst_pad_push (internal_srcpad, buffer);
gst_object_unref (internal_srcpad);
} else {
@ -914,9 +969,26 @@ gst_auto_convert_sink_event (GstPad * pad, GstEvent * event)
ret = gst_pad_push_event (internal_srcpad, event);
gst_object_unref (internal_srcpad);
} else {
GST_WARNING_OBJECT (autoconvert, "Got event while no element was selected,"
"letting through");
ret = gst_pad_push_event (autoconvert->srcpad, event);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH_STOP:
GST_OBJECT_LOCK (autoconvert);
g_list_foreach (autoconvert->cached_events,
(GFunc) gst_mini_object_unref, NULL);
g_list_free (autoconvert->cached_events);
autoconvert->cached_events = NULL;
GST_OBJECT_UNLOCK (autoconvert);
/* fall through */
case GST_EVENT_FLUSH_START:
ret = gst_pad_push_event (autoconvert->srcpad, event);
break;
default:
GST_OBJECT_LOCK (autoconvert);
autoconvert->cached_events =
g_list_prepend (autoconvert->cached_events, event);
ret = TRUE;
GST_OBJECT_UNLOCK (autoconvert);
break;
}
}
gst_object_unref (autoconvert);
@ -943,7 +1015,7 @@ gst_auto_convert_sink_query (GstPad * pad, GstQuery * query)
} else {
GST_WARNING_OBJECT (autoconvert, "Got query while no element was selected,"
"letting through");
ret = gst_pad_query_default (pad, query);
ret = gst_pad_peer_query (autoconvert->srcpad, query);
}
gst_object_unref (autoconvert);
@ -1181,7 +1253,7 @@ gst_auto_convert_src_query (GstPad * pad, GstQuery * query)
} else {
GST_WARNING_OBJECT (autoconvert, "Got query while not element was selected,"
"letting through");
ret = gst_pad_query_default (pad, query);
ret = gst_pad_peer_query (autoconvert->sinkpad, query);
}
gst_object_unref (autoconvert);

1
gst/autoconvert/gstautoconvert.h
View file

@ -53,7 +53,6 @@ struct _GstAutoConvert
GstPad *current_internal_srcpad;
GstPad *current_internal_sinkpad;
GstSegment segment;
GList *cached_events;
};