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aggregator: bring start/stop vfunc semantics in line with other baseclasses

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Sub-class should not have to chain up to GstAggregator's start/stop
vfuncs, same as in GstBaseSrc, GstBaseSink, GstBaseTransform etc.
This commit is contained in:
Tim-Philipp Müller 2014-12-30 17:50:17 +00:00
parent 4a38668d99
commit b4d2deb6d6
1 changed files with 36 additions and 10 deletions
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46
gst-libs/gst/base/gstaggregator.c
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@ -621,8 +621,11 @@ aggregate_func (GstAggregator * self)
}
static gboolean
_start (GstAggregator * self)
gst_aggregator_start (GstAggregator * self)
{
GstAggregatorClass *klass;
gboolean result;
self->priv->running = TRUE;
self->priv->send_stream_start = TRUE;
self->priv->send_segment = TRUE;
@ -630,7 +633,14 @@ _start (GstAggregator * self)
self->priv->srccaps = NULL;
self->priv->flow_return = GST_FLOW_OK;
return TRUE;
klass = GST_AGGREGATOR_GET_CLASS (self);
if (klass->start)
result = klass->start (self);
else
result = TRUE;
return result;
}
static gboolean
@ -867,8 +877,11 @@ _stop_pad (GstAggregator * self, GstAggregatorPad * pad, gpointer unused_udata)
}
static gboolean
_stop (GstAggregator * agg)
gst_aggregator_stop (GstAggregator * agg)
{
GstAggregatorClass *klass;
gboolean result;
_reset_flow_values (agg);
gst_aggregator_iterate_sinkpads (agg,
@ -878,7 +891,14 @@ _stop (GstAggregator * agg)
gst_tag_list_unref (agg->priv->tags);
agg->priv->tags = NULL;
return TRUE;
klass = GST_AGGREGATOR_GET_CLASS (agg);
if (klass->stop)
result = klass->stop (agg);
else
result = TRUE;
return result;
}
/* GstElement vmethods implementations */
@ -887,12 +907,11 @@ _change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret;
GstAggregator *self = GST_AGGREGATOR (element);
GstAggregatorClass *agg_class = GST_AGGREGATOR_GET_CLASS (self);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
agg_class->start (self);
if (!gst_aggregator_start (self))
goto error_start;
break;
default:
break;
@ -906,7 +925,10 @@ _change_state (GstElement * element, GstStateChange transition)
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
agg_class->stop (self);
if (!gst_aggregator_stop (self)) {
/* What to do in this case? Error out? */
GST_ERROR_OBJECT (self, "Subclass failed to stop.");
}
break;
default:
break;
@ -914,11 +936,17 @@ _change_state (GstElement * element, GstStateChange transition)
return ret;
/* ERRORS */
failure:
{
GST_ERROR_OBJECT (element, "parent failed state change");
return ret;
}
error_start:
{
GST_ERROR_OBJECT (element, "Subclass failed to start");
return GST_STATE_CHANGE_FAILURE;
}
}
static void
@ -1552,8 +1580,6 @@ gst_aggregator_class_init (GstAggregatorClass * klass)
GST_DEBUG_FG_MAGENTA, "GstAggregator");
klass->sinkpads_type = GST_TYPE_AGGREGATOR_PAD;
klass->start = _start;
klass->stop = _stop;
klass->sink_event = _sink_event;
klass->sink_query = _sink_query;