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element: API: Add GstElement::post_message() vfunc

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This commit is contained in:
Sebastian Dröge 2012-10-16 12:31:50 +02:00
parent bbec3d4e2f
commit 09743e0ac9
2 changed files with 39 additions and 17 deletions
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50
gst/gstelement.c
View file

@ -141,6 +141,9 @@ static GstStateChangeReturn gst_element_get_state_func (GstElement * element,
static GstStateChangeReturn gst_element_set_state_func (GstElement * element,
GstState state);
static void gst_element_set_bus_func (GstElement * element, GstBus * bus);
static gboolean gst_element_post_message_default (GstElement * element,
GstMessage * message);
static gboolean gst_element_default_send_event (GstElement * element,
GstEvent * event);
@ -261,6 +264,7 @@ gst_element_class_init (GstElementClass * klass)
klass->query = GST_DEBUG_FUNCPTR (gst_element_default_query);
klass->send_event = GST_DEBUG_FUNCPTR (gst_element_default_send_event);
klass->numpadtemplates = 0;
klass->post_message = GST_DEBUG_FUNCPTR (gst_element_post_message_default);
klass->elementfactory = NULL;
}
@ -1819,22 +1823,8 @@ gst_element_query (GstElement * element, GstQuery * query)
return result;
}
/**
* gst_element_post_message:
* @element: a #GstElement posting the message
* @message: (transfer full): a #GstMessage to post
*
* Post a message on the element's #GstBus. This function takes ownership of the
* message; if you want to access the message after this call, you should add an
* additional reference before calling.
*
* Returns: %TRUE if the message was successfully posted. The function returns
* %FALSE if the element did not have a bus.
*
* MT safe.
*/
gboolean
gst_element_post_message (GstElement * element, GstMessage * message)
static gboolean
gst_element_post_message_default (GstElement * element, GstMessage * message)
{
GstBus *bus;
gboolean result = FALSE;
@ -1869,6 +1859,34 @@ no_bus:
}
}
/**
* gst_element_post_message:
* @element: a #GstElement posting the message
* @message: (transfer full): a #GstMessage to post
*
* Post a message on the element's #GstBus. This function takes ownership of the
* message; if you want to access the message after this call, you should add an
* additional reference before calling.
*
* Returns: %TRUE if the message was successfully posted. The function returns
* %FALSE if the element did not have a bus.
*
* MT safe.
*/
gboolean
gst_element_post_message (GstElement * element, GstMessage * message)
{
GstElementClass *klass;
g_return_val_if_fail (GST_IS_ELEMENT (element), FALSE);
klass = GST_ELEMENT_GET_CLASS (element);
if (klass->post_message)
return klass->post_message (element, message);
return FALSE;
}
/**
* _gst_element_error_printf:
* @format: the printf-like format to use, or %NULL

6
gst/gstelement.h
View file

@ -604,6 +604,8 @@ struct _GstElement
* @query: perform a #GstQuery on the element
* @request_new_pad_full: called when a new pad is requested. Since: 0.10.32.
* @state_changed: called immediately after a new state was set. Since: 0.10.36.
* @post_message: called when a message is posted on the element. Chain up to
* the parent class' handler to have it posted on the bus. Since: 0.10.37.
*
* GStreamer element class. Override the vmethods to implement the element
* functionality.
@ -674,8 +676,10 @@ struct _GstElementClass
void (*state_changed) (GstElement *element, GstState oldstate,
GstState newstate, GstState pending);
gboolean (*post_message) (GstElement *element, GstMessage *message);
/*< private >*/
gpointer _gst_reserved[GST_PADDING-3];
gpointer _gst_reserved[GST_PADDING-4];
};
/* element class pad templates */