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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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aggregator: Add sink_event_pre_queue() and sink_query_pre_queue() vfuncs
These allow subclasses catching serialized events/queries before they're queued up.
This commit is contained in:
Sebastian Dröge
parent
aebff1fcaa
commit
d7d79f2c54
2 changed files with 131 additions and 95 deletions
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@ -1586,6 +1586,61 @@ eat:
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return res;
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}
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/* Queue serialized events and let the others go through directly.
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* The queued events with be handled from the src-pad task in
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* gst_aggregator_do_events_and_queries().
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*/
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static gboolean
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gst_aggregator_default_sink_event_pre_queue (GstAggregator * self,
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GstAggregatorPad * aggpad, GstEvent * event)
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{
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GstFlowReturn ret = GST_FLOW_OK;
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if (GST_EVENT_IS_SERIALIZED (event)
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&& GST_EVENT_TYPE (event) != GST_EVENT_FLUSH_STOP) {
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SRC_LOCK (self);
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PAD_LOCK (aggpad);
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if (aggpad->priv->flow_return != GST_FLOW_OK)
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goto flushing;
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if (GST_EVENT_TYPE (event) == GST_EVENT_SEGMENT) {
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GST_OBJECT_LOCK (aggpad);
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gst_event_copy_segment (event, &aggpad->priv->head_segment);
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aggpad->priv->head_position = aggpad->priv->head_segment.position;
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update_time_level (aggpad, TRUE);
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GST_OBJECT_UNLOCK (aggpad);
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}
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GST_DEBUG_OBJECT (aggpad, "Store event in queue: %" GST_PTR_FORMAT, event);
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g_queue_push_head (&aggpad->priv->data, event);
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SRC_BROADCAST (self);
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PAD_UNLOCK (aggpad);
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SRC_UNLOCK (self);
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} else {
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GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (self);
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if (!klass->sink_event (self, aggpad, event)) {
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/* Copied from GstPad to convert boolean to a GstFlowReturn in
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* the event handling func */
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ret = GST_FLOW_ERROR;
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}
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}
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return ret;
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flushing:
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GST_DEBUG_OBJECT (aggpad, "Pad is %s, dropping event",
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gst_flow_get_name (aggpad->priv->flow_return));
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PAD_UNLOCK (aggpad);
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SRC_UNLOCK (self);
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if (GST_EVENT_IS_STICKY (event))
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gst_pad_store_sticky_event (GST_PAD (aggpad), event);
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gst_event_unref (event);
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return aggpad->priv->flow_return;
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}
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static gboolean
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gst_aggregator_stop_pad (GstElement * self, GstPad * epad, gpointer user_data)
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{
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@ -2257,6 +2312,58 @@ gst_aggregator_default_sink_query (GstAggregator * self,
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return gst_pad_query_default (pad, GST_OBJECT (self), query);
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}
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static gboolean
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gst_aggregator_default_sink_query_pre_queue (GstAggregator * self,
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GstAggregatorPad * aggpad, GstQuery * query)
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{
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if (GST_QUERY_IS_SERIALIZED (query)) {
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GstStructure *s;
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gboolean ret = FALSE;
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SRC_LOCK (self);
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PAD_LOCK (aggpad);
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if (aggpad->priv->flow_return != GST_FLOW_OK) {
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SRC_UNLOCK (self);
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goto flushing;
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}
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g_queue_push_head (&aggpad->priv->data, query);
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SRC_BROADCAST (self);
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SRC_UNLOCK (self);
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while (!gst_aggregator_pad_queue_is_empty (aggpad)
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&& aggpad->priv->flow_return == GST_FLOW_OK) {
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GST_DEBUG_OBJECT (aggpad, "Waiting for buffer to be consumed");
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PAD_WAIT_EVENT (aggpad);
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}
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s = gst_query_writable_structure (query);
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if (gst_structure_get_boolean (s, "gst-aggregator-retval", &ret))
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gst_structure_remove_field (s, "gst-aggregator-retval");
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else
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g_queue_remove (&aggpad->priv->data, query);
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if (aggpad->priv->flow_return != GST_FLOW_OK)
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goto flushing;
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PAD_UNLOCK (aggpad);
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return ret;
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} else {
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GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (self);
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return klass->sink_query (self, aggpad, query);
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}
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flushing:
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GST_DEBUG_OBJECT (aggpad, "Pad is %s, dropping query",
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gst_flow_get_name (aggpad->priv->flow_return));
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PAD_UNLOCK (aggpad);
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return FALSE;
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}
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static void
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gst_aggregator_finalize (GObject * object)
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{
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@ -2427,6 +2534,9 @@ gst_aggregator_class_init (GstAggregatorClass * klass)
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klass->negotiate = gst_aggregator_default_negotiate;
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klass->sink_event_pre_queue = gst_aggregator_default_sink_event_pre_queue;
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klass->sink_query_pre_queue = gst_aggregator_default_sink_query_pre_queue;
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gstelement_class->request_new_pad =
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GST_DEBUG_FUNCPTR (gst_aggregator_request_new_pad);
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gstelement_class->send_event = GST_DEBUG_FUNCPTR (gst_aggregator_send_event);
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@ -2769,111 +2879,23 @@ gst_aggregator_pad_query_func (GstPad * pad, GstObject * parent,
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GstQuery * query)
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{
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GstAggregator *self = GST_AGGREGATOR (parent);
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GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (self);
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GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
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if (GST_QUERY_IS_SERIALIZED (query)) {
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GstStructure *s;
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gboolean ret = FALSE;
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SRC_LOCK (self);
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PAD_LOCK (aggpad);
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if (aggpad->priv->flow_return != GST_FLOW_OK) {
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SRC_UNLOCK (self);
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goto flushing;
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}
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g_queue_push_head (&aggpad->priv->data, query);
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SRC_BROADCAST (self);
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SRC_UNLOCK (self);
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while (!gst_aggregator_pad_queue_is_empty (aggpad)
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&& aggpad->priv->flow_return == GST_FLOW_OK) {
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GST_DEBUG_OBJECT (aggpad, "Waiting for buffer to be consumed");
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PAD_WAIT_EVENT (aggpad);
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}
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s = gst_query_writable_structure (query);
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if (gst_structure_get_boolean (s, "gst-aggregator-retval", &ret))
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gst_structure_remove_field (s, "gst-aggregator-retval");
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else
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g_queue_remove (&aggpad->priv->data, query);
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if (aggpad->priv->flow_return != GST_FLOW_OK)
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goto flushing;
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PAD_UNLOCK (aggpad);
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return ret;
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} else {
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GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
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return klass->sink_query (self, aggpad, query);
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}
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flushing:
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GST_DEBUG_OBJECT (aggpad, "Pad is %s, dropping query",
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gst_flow_get_name (aggpad->priv->flow_return));
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PAD_UNLOCK (aggpad);
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return FALSE;
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g_assert (klass->sink_query_pre_queue);
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return klass->sink_query_pre_queue (self, aggpad, query);
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}
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/* Queue serialized events and let the others go through directly.
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* The queued events with be handled from the src-pad task in
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* gst_aggregator_do_events_and_queries().
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*/
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static GstFlowReturn
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gst_aggregator_pad_event_func (GstPad * pad, GstObject * parent,
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GstEvent * event)
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{
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GstFlowReturn ret = GST_FLOW_OK;
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GstAggregator *self = GST_AGGREGATOR (parent);
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GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (self);
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GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
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if (GST_EVENT_IS_SERIALIZED (event)
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&& GST_EVENT_TYPE (event) != GST_EVENT_FLUSH_STOP) {
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SRC_LOCK (self);
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PAD_LOCK (aggpad);
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if (aggpad->priv->flow_return != GST_FLOW_OK)
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goto flushing;
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if (GST_EVENT_TYPE (event) == GST_EVENT_SEGMENT) {
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GST_OBJECT_LOCK (aggpad);
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gst_event_copy_segment (event, &aggpad->priv->head_segment);
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aggpad->priv->head_position = aggpad->priv->head_segment.position;
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update_time_level (aggpad, TRUE);
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GST_OBJECT_UNLOCK (aggpad);
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}
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GST_DEBUG_OBJECT (aggpad, "Store event in queue: %" GST_PTR_FORMAT, event);
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g_queue_push_head (&aggpad->priv->data, event);
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SRC_BROADCAST (self);
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PAD_UNLOCK (aggpad);
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SRC_UNLOCK (self);
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} else {
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GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
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if (!klass->sink_event (self, aggpad, event)) {
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/* Copied from GstPad to convert boolean to a GstFlowReturn in
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* the event handling func */
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ret = GST_FLOW_ERROR;
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}
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}
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return ret;
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flushing:
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GST_DEBUG_OBJECT (aggpad, "Pad is %s, dropping event",
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gst_flow_get_name (aggpad->priv->flow_return));
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PAD_UNLOCK (aggpad);
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SRC_UNLOCK (self);
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if (GST_EVENT_IS_STICKY (event))
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gst_pad_store_sticky_event (pad, event);
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gst_event_unref (event);
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return aggpad->priv->flow_return;
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g_assert (klass->sink_event_pre_queue);
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return klass->sink_event_pre_queue (self, aggpad, event);
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}
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static gboolean
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@ -237,6 +237,12 @@ struct _GstAggregator
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* Allows the subclass to handle the allocation query from upstream.
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* @negotiate: Optional.
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* Negotiate the caps with the peer (Since: 1.18).
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* @sink_event_pre_queue: Optional.
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* Called when an event is received on a sink pad before queueing up
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* serialized events. The subclass should always chain up (Since: 1.18).
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* @sink_query_pre_queue: Optional.
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* Called when a query is received on a sink pad before queueing up
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* serialized queries. The subclass should always chain up (Since: 1.18).
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*
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* The aggregator base class will handle in a thread-safe way all manners of
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* concurrent flushes, seeks, pad additions and removals, leaving to the
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@ -316,8 +322,16 @@ struct _GstAggregatorClass {
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gboolean (*negotiate) (GstAggregator * self);
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gboolean (*sink_event_pre_queue) (GstAggregator * aggregator,
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GstAggregatorPad * aggregator_pad,
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GstEvent * event);
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gboolean (*sink_query_pre_queue) (GstAggregator * aggregator,
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GstAggregatorPad * aggregator_pad,
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GstQuery * query);
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/*< private >*/
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gpointer _gst_reserved[GST_PADDING_LARGE-1];
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gpointer _gst_reserved[GST_PADDING_LARGE-3];
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};
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/************************************
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