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queue2: Unblock any waiting serialize queries on FLUSH_START

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Fixes some deadlocks during flushing.

And store queue items differently to not accidentially read
already unreffed queries when flushing. Queries are owned by
upstream and not us.
This commit is contained in:
Sebastian Dröge 2013-05-27 15:41:14 +02:00
parent b6fac17502
commit cdc429f296
1 changed files with 34 additions and 14 deletions
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48
plugins/elements/gstqueue2.c
View file

@ -265,6 +265,12 @@ typedef enum
GST_QUEUE2_ITEM_TYPE_QUERY
} GstQueue2ItemType;
typedef struct
{
GstQueue2ItemType type;
GstMiniObject *item;
} GstQueue2Item;
/* static guint gst_queue2_signals[LAST_SIGNAL] = { 0 }; */
static void
@ -467,10 +473,11 @@ gst_queue2_finalize (GObject * object)
GST_DEBUG_OBJECT (queue, "finalizing queue");
while (!g_queue_is_empty (&queue->queue)) {
GstMiniObject *data = g_queue_pop_head (&queue->queue);
GstQueue2Item *qitem = g_queue_pop_head (&queue->queue);
if (!GST_IS_QUERY (data))
gst_mini_object_unref (data);
if (qitem->type != GST_QUEUE2_ITEM_TYPE_QUERY)
gst_mini_object_unref (qitem->item);
g_slice_free (GstQueue2Item, qitem);
}
queue->last_query = FALSE;
@ -1528,18 +1535,21 @@ gst_queue2_locked_flush (GstQueue2 * queue, gboolean full)
init_ranges (queue);
} else {
while (!g_queue_is_empty (&queue->queue)) {
GstMiniObject *data = g_queue_pop_head (&queue->queue);
GstQueue2Item *qitem = g_queue_pop_head (&queue->queue);
if (!full && GST_IS_EVENT (data) && GST_EVENT_IS_STICKY (data) &&
GST_EVENT_TYPE (data) != GST_EVENT_SEGMENT
&& GST_EVENT_TYPE (data) != GST_EVENT_EOS) {
gst_pad_store_sticky_event (queue->srcpad, GST_EVENT_CAST (data));
if (!full && qitem->type == GST_QUEUE2_ITEM_TYPE_EVENT
&& GST_EVENT_IS_STICKY (qitem->item)
&& GST_EVENT_TYPE (qitem->item) != GST_EVENT_SEGMENT
&& GST_EVENT_TYPE (qitem->item) != GST_EVENT_EOS) {
gst_pad_store_sticky_event (queue->srcpad,
GST_EVENT_CAST (qitem->item));
}
/* Then lose another reference because we are supposed to destroy that
data when flushing */
if (!GST_IS_QUERY (data))
gst_mini_object_unref (data);
if (qitem->type != GST_QUEUE2_ITEM_TYPE_QUERY)
gst_mini_object_unref (qitem->item);
g_slice_free (GstQueue2Item, qitem);
}
}
g_cond_signal (&queue->query_handled);
@ -2034,7 +2044,10 @@ gst_queue2_locked_enqueue (GstQueue2 * queue, gpointer item,
update_buffering (queue);
if (QUEUE_IS_USING_QUEUE (queue)) {
g_queue_push_tail (&queue->queue, item);
GstQueue2Item *qitem = g_slice_new (GstQueue2Item);
qitem->type = item_type;
qitem->item = item;
g_queue_push_tail (&queue->queue, qitem);
} else {
gst_mini_object_unref (GST_MINI_OBJECT_CAST (item));
}
@ -2062,10 +2075,13 @@ gst_queue2_locked_dequeue (GstQueue2 * queue, GstQueue2ItemType * item_type)
{
GstMiniObject *item;
if (!QUEUE_IS_USING_QUEUE (queue))
if (!QUEUE_IS_USING_QUEUE (queue)) {
item = gst_queue2_read_item_from_file (queue);
else
item = g_queue_pop_head (&queue->queue);
} else {
GstQueue2Item *qitem = g_queue_pop_head (&queue->queue);
item = qitem->item;
g_slice_free (GstQueue2Item, qitem);
}
if (item == NULL)
goto no_item;
@ -2182,6 +2198,8 @@ gst_queue2_handle_sink_event (GstPad * pad, GstObject * parent,
/* unblock the loop and chain functions */
GST_QUEUE2_SIGNAL_ADD (queue);
GST_QUEUE2_SIGNAL_DEL (queue);
queue->last_query = FALSE;
g_cond_signal (&queue->query_handled);
GST_QUEUE2_MUTEX_UNLOCK (queue);
/* make sure it pauses, this should happen since we sent
@ -2193,6 +2211,8 @@ gst_queue2_handle_sink_event (GstPad * pad, GstObject * parent,
/* flush the sink pad */
queue->sinkresult = GST_FLOW_FLUSHING;
GST_QUEUE2_SIGNAL_DEL (queue);
queue->last_query = FALSE;
g_cond_signal (&queue->query_handled);
GST_QUEUE2_MUTEX_UNLOCK (queue);
gst_event_unref (event);