static GstFlowReturn gst_base_transform_buffer_alloc (GstPad * pad,
guint64 offset, guint size, GstCaps * caps, GstBuffer ** buf);
static gboolean gst_base_transform_query (GstPad * pad, GstQuery * query);
+static gboolean gst_base_transform_default_query (GstBaseTransform * trans,
+ GstPad * pad, GstQuery * query);
static const GstQueryType *gst_base_transform_query_type (GstPad * pad);
/* static guint gst_base_transform_signals[LAST_SIGNAL] = { 0 }; */
klass->src_event = GST_DEBUG_FUNCPTR (gst_base_transform_src_eventfunc);
klass->accept_caps =
GST_DEBUG_FUNCPTR (gst_base_transform_acceptcaps_default);
+ klass->query = GST_DEBUG_FUNCPTR (gst_base_transform_default_query);
}
static void
}
static gboolean
-gst_base_transform_query (GstPad * pad, GstQuery * query)
+gst_base_transform_default_query (GstBaseTransform * trans,
+ GstPad * pad, GstQuery * query)
{
gboolean ret = FALSE;
- GstBaseTransform *trans;
GstPad *otherpad;
- trans = GST_BASE_TRANSFORM (gst_pad_get_parent (pad));
- if (G_UNLIKELY (trans == NULL))
- return FALSE;
otherpad = (pad == trans->srcpad) ? trans->sinkpad : trans->srcpad;
switch (GST_QUERY_TYPE (query)) {
break;
}
+ return ret;
+}
+
+static gboolean
+gst_base_transform_query (GstPad * pad, GstQuery * query)
+{
+ GstBaseTransform *trans;
+ GstBaseTransformClass *bclass;
+ gboolean ret;
+
+ trans = GST_BASE_TRANSFORM (gst_pad_get_parent (pad));
+ if (G_UNLIKELY (trans == NULL))
+ return FALSE;
+
+ bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
+
+ if (bclass->query)
+ ret = bclass->query (trans, pad, query);
+ else
+ ret = gst_pad_query_default (pad, query);
+
gst_object_unref (trans);
+
return ret;
}
* Subclasses can override this method to check if @caps can be
* handled by the element. The default implementation might not be
* the most optimal way to check this in all cases.
+ * @query: Optional Since 0.10.36
+ * Handle a requested query. Subclasses that implement this
+ * should must chain up to the parent if they didn't handle the
+ * query
*
* Subclasses can override any of the available virtual methods or not, as
* needed. At minimum either @transform or @transform_ip need to be overridden.
gboolean (*accept_caps) (GstBaseTransform *trans, GstPadDirection direction,
GstCaps *caps);
+ gboolean (*query) (GstBaseTransform *trans, GstPad *pad, GstQuery *query);
/*< private >*/
- gpointer _gst_reserved[GST_PADDING_LARGE - 3];
+ gpointer _gst_reserved[GST_PADDING_LARGE - 4];
};
GType gst_base_transform_get_type (void);