gstpad: Probes that return HANDLED can reset the data info field

[platform/upstream/gstreamer.git] / gst / gstbus.c

diff --git a/gst/gstbus.c b/gst/gstbus.c
index 7bf71b6..cddaf39 100644 (file)
--- a/gst/gstbus.c
+++ b/gst/gstbus.c
@@ -129,7 +129,7 @@ struct _GstBusPrivate
 };
 
 #define gst_bus_parent_class parent_class
-G_DEFINE_TYPE (GstBus, gst_bus, GST_TYPE_OBJECT);
+G_DEFINE_TYPE_WITH_PRIVATE (GstBus, gst_bus, GST_TYPE_OBJECT);
 
 static void
 gst_bus_set_property (GObject * object,
@@ -217,21 +217,16 @@ gst_bus_class_init (GstBusClass * klass)
       G_SIGNAL_RUN_LAST | G_SIGNAL_DETAILED,
       G_STRUCT_OFFSET (GstBusClass, message), NULL, NULL,
       g_cclosure_marshal_generic, G_TYPE_NONE, 1, GST_TYPE_MESSAGE);
-
-  g_type_class_add_private (klass, sizeof (GstBusPrivate));
 }
 
 static void
 gst_bus_init (GstBus * bus)
 {
-  bus->priv = G_TYPE_INSTANCE_GET_PRIVATE (bus, GST_TYPE_BUS, GstBusPrivate);
+  bus->priv = gst_bus_get_instance_private (bus);
   bus->priv->enable_async = DEFAULT_ENABLE_ASYNC;
   g_mutex_init (&bus->priv->queue_lock);
   bus->priv->queue = gst_atomic_queue_new (32);
 
-  /* clear floating flag */
-  gst_object_ref_sink (bus);
-
   GST_DEBUG_OBJECT (bus, "created");
 }
 
@@ -285,9 +280,12 @@ gst_bus_new (void)
 {
   GstBus *result;
 
-  result = g_object_newv (gst_bus_get_type (), 0, NULL);
+  result = g_object_new (gst_bus_get_type (), NULL);
   GST_DEBUG_OBJECT (result, "created new bus");
 
+  /* clear floating flag */
+  gst_object_ref_sink (result);
+
   return result;
 }
 
@@ -761,6 +759,31 @@ no_replace:
   }
 }
 
+/**
+ * gst_bus_get_pollfd:
+ * @bus: A #GstBus
+ * @fd: (out): A GPollFD to fill
+ *
+ * Gets the file descriptor from the bus which can be used to get notified about
+ * messages being available with functions like g_poll(), and allows integration
+ * into other event loops based on file descriptors.
+ * Whenever a message is available, the POLLIN / %G_IO_IN event is set.
+ *
+ * Warning: NEVER read or write anything to the returned fd but only use it
+ * for getting notifications via g_poll() or similar and then use the normal
+ * GstBus API, e.g. gst_bus_pop().
+ *
+ * Since: 1.14
+ */
+void
+gst_bus_get_pollfd (GstBus * bus, GPollFD * fd)
+{
+  g_return_if_fail (GST_IS_BUS (bus));
+  g_return_if_fail (bus->priv->poll != NULL);
+
+  *fd = bus->priv->pollfd;
+}
+
 /* GSource for the bus
  */
 typedef struct
@@ -863,7 +886,7 @@ static GSourceFuncs gst_bus_source_funcs = {
  * a message is on the bus. After the GSource is dispatched, the
  * message is popped off the bus and unreffed.
  *
- * Returns: (transfer full): a #GSource that can be added to a mainloop.
+ * Returns: (transfer full) (nullable): a #GSource that can be added to a mainloop.
  */
 GSource *
 gst_bus_create_watch (GstBus * bus)
@@ -949,6 +972,9 @@ gst_bus_add_watch_full_unlocked (GstBus * bus, gint priority,
  * from @func. If the watch was added to the default main context it is also
  * possible to remove the watch using g_source_remove().
  *
+ * The bus watch will take its own reference to the @bus, so it is safe to unref
+ * @bus using gst_object_unref() after setting the bus watch.
+ *
  * MT safe.
  *
  * Returns: The event source id or 0 if @bus already got an event source.
@@ -990,9 +1016,12 @@ gst_bus_add_watch_full (GstBus * bus, gint priority,
  * from @func. If the watch was added to the default main context it is also
  * possible to remove the watch using g_source_remove().
  *
- * Returns: The event source id or 0 if @bus already got an event source.
+ * The bus watch will take its own reference to the @bus, so it is safe to unref
+ * @bus using gst_object_unref() after setting the bus watch.
  *
  * MT safe.
+ *
+ * Returns: The event source id or 0 if @bus already got an event source.
  */
 guint
 gst_bus_add_watch (GstBus * bus, GstBusFunc func, gpointer user_data)
@@ -1015,7 +1044,7 @@ gst_bus_add_watch (GstBus * bus, GstBusFunc func, gpointer user_data)
 gboolean
 gst_bus_remove_watch (GstBus * bus)
 {
-  GSource *watch_id;
+  GSource *source;
 
   g_return_val_if_fail (GST_IS_BUS (bus), FALSE);
 
@@ -1023,18 +1052,28 @@ gst_bus_remove_watch (GstBus * bus)
 
   if (bus->priv->signal_watch == NULL) {
     GST_ERROR_OBJECT (bus, "no bus watch was present");
-    goto no_watch;
+    goto error;
   }
 
-  watch_id = bus->priv->signal_watch;
+  if (bus->priv->num_signal_watchers > 0) {
+    GST_ERROR_OBJECT (bus,
+        "trying to remove signal watch with gst_bus_remove_watch()");
+    goto error;
+  }
+
+  source =
+      bus->priv->signal_watch ? g_source_ref (bus->priv->signal_watch) : NULL;
 
   GST_OBJECT_UNLOCK (bus);
 
-  g_source_destroy (watch_id);
+  if (source) {
+    g_source_destroy (source);
+    g_source_unref (source);
+  }
 
   return TRUE;
 
-no_watch:
+error:
   GST_OBJECT_UNLOCK (bus);
 
   return FALSE;
@@ -1424,13 +1463,16 @@ gst_bus_remove_signal_watch (GstBus * bus)
   GST_DEBUG_OBJECT (bus, "removing signal watch %u",
       g_source_get_id (bus->priv->signal_watch));
 
-  source = bus->priv->signal_watch;
+  source =
+      bus->priv->signal_watch ? g_source_ref (bus->priv->signal_watch) : NULL;
 
 done:
   GST_OBJECT_UNLOCK (bus);
 
-  if (source)
+  if (source) {
     g_source_destroy (source);
+    g_source_unref (source);
+  }
 
   return;