belle_sip_object_t *belle_sip_object_weak_ref(void *obj, belle_sip_object_destroy_notify_t destroy_notify, void *userpointer){
belle_sip_object_t *o=BELLE_SIP_OBJECT(obj);
weak_ref_t *old=o->weak_refs;
o->weak_refs=weak_ref_new(destroy_notify,userpointer);
o->weak_refs->next=old;
return o;
}
/**
* gst_rtsp_media_factory_construct:
* @factory: a #GstRTSPMediaFactory
* @url: the url used
*
* Construct the media object and create its streams. Implementations
* should create the needed gstreamer elements and add them to the result
* object. No state changes should be performed on them yet.
*
* One or more GstRTSPStream objects should be created from the result
* with gst_rtsp_media_create_stream ().
*
* After the media is constructed, it can be configured and then prepared
* with gst_rtsp_media_prepare ().
*
* Returns: (transfer full): a new #GstRTSPMedia if the media could be prepared.
*/
GstRTSPMedia *
gst_rtsp_media_factory_construct (GstRTSPMediaFactory * factory,
const GstRTSPUrl * url)
{
GstRTSPMediaFactoryPrivate *priv;
gchar *key;
GstRTSPMedia *media;
GstRTSPMediaFactoryClass *klass;
g_return_val_if_fail (GST_IS_RTSP_MEDIA_FACTORY (factory), NULL);
g_return_val_if_fail (url != NULL, NULL);
priv = factory->priv;
klass = GST_RTSP_MEDIA_FACTORY_GET_CLASS (factory);
/* convert the url to a key for the hashtable. NULL return or a NULL function
* will not cache anything for this factory. */
if (klass->gen_key)
key = klass->gen_key (factory, url);
else
key = NULL;
g_mutex_lock (&priv->medias_lock);
if (key) {
/* we have a key, see if we find a cached media */
media = g_hash_table_lookup (priv->medias, key);
if (media)
g_object_ref (media);
} else
media = NULL;
if (media == NULL) {
/* nothing cached found, try to create one */
if (klass->construct) {
media = klass->construct (factory, url);
if (media)
g_signal_emit (factory,
gst_rtsp_media_factory_signals[SIGNAL_MEDIA_CONSTRUCTED], 0, media,
NULL);
} else
media = NULL;
if (media) {
/* configure the media */
if (klass->configure)
klass->configure (factory, media);
g_signal_emit (factory,
gst_rtsp_media_factory_signals[SIGNAL_MEDIA_CONFIGURE], 0, media,
NULL);
/* check if we can cache this media */
if (gst_rtsp_media_is_shared (media)) {
/* insert in the hashtable, takes ownership of the key */
g_object_ref (media);
g_hash_table_insert (priv->medias, key, media);
key = NULL;
}
if (!gst_rtsp_media_is_reusable (media)) {
/* when not reusable, connect to the unprepare signal to remove the item
* from our cache when it gets unprepared */
g_signal_connect_data (media, "unprepared",
(GCallback) media_unprepared, weak_ref_new (factory),
(GClosureNotify) weak_ref_free, 0);
}
}
}
g_mutex_unlock (&priv->medias_lock);
if (key)
g_free (key);
GST_INFO ("constructed media %p for url %s", media, url->abspath);
return media;
}