void
MediaSink::unlinkUnchecked (GstPad *sink)
{
GstPad *peer;
GstPad *sinkPad;
if (sink == NULL)
sinkPad = gst_element_get_static_pad (getElement(), getPadName().c_str() );
else
sinkPad = sink;
if (sinkPad == NULL)
return;
peer = gst_pad_get_peer (sinkPad);
if (peer != NULL) {
gst_pad_unlink (peer, sinkPad);
g_object_unref (peer);
}
if (sink == NULL) {
GstElement *elem;
elem = gst_pad_get_parent_element (sinkPad);
gst_element_release_request_pad (elem, sinkPad);
g_object_unref (elem);
g_object_unref (sinkPad);
}
}
void
MediaSinkImpl::unlinkUnchecked (GstPad *sink)
{
GstPad *peer;
GstPad *sinkPad;
if (sink == NULL) {
sinkPad = gst_element_get_static_pad (getGstreamerElement(),
getPadName().c_str() );
} else {
sinkPad = sink;
}
if (sinkPad == NULL) {
return;
}
peer = gst_pad_get_peer (sinkPad);
if (peer != NULL) {
Glib::Threads::Cond cond;
Glib::Threads::Mutex cmutex;
bool blocked = FALSE;
std::function <void (GstPad *, GstPadProbeInfo *) >
blockedLambda = [&] (GstPad * pad, GstPadProbeInfo * info) {
Glib::Threads::Mutex::Lock lock (cmutex);
GST_DEBUG ("Peer pad blocked %" GST_PTR_FORMAT, pad);
if (blocked) {
return;
}
gst_pad_unlink (pad, sinkPad);
blocked = TRUE;
cond.signal();
};
gst_pad_add_probe (peer, (GstPadProbeType) (GST_PAD_PROBE_TYPE_BLOCKING),
pad_blocked_adaptor, &blockedLambda, NULL);
cmutex.lock ();
while (!blocked) {
cond.wait (cmutex);
}
cmutex.unlock ();
g_object_unref (peer);
}
if (sink == NULL) {
gst_element_release_request_pad (getGstreamerElement(), sinkPad);
g_object_unref (sinkPad);
}
}
bool
MediaSink::linkPad (std::shared_ptr<MediaSrc> mediaSrc, GstPad *src)
{
std::shared_ptr<MediaSrc> connectedSrcLocked;
GstPad *sink;
bool ret = false;
mutex.lock();
try {
connectedSrcLocked = connectedSrc.lock();
} catch (const std::bad_weak_ptr &e) {
}
if ( (sink = gst_element_get_static_pad (getElement(), getPadName().c_str() ) ) == NULL)
sink = gst_element_get_request_pad (getElement(), getPadName().c_str() );
if (gst_pad_is_linked (sink) ) {
unlink (connectedSrcLocked, sink);
}
if (mediaSrc->parent == parent) {
GstBin *container;
GstElement *filter, *parent;
GstPad *aux_sink, *aux_src;
GST_DEBUG ("Connecting loopback, adding a capsfilter to allow connection");
parent = GST_ELEMENT (GST_OBJECT_PARENT (sink) );
if (parent == NULL)
goto end;
container = GST_BIN (GST_OBJECT_PARENT (parent) );
if (container == NULL)
goto end;
filter = gst_element_factory_make ("capsfilter", NULL);
aux_sink = gst_element_get_static_pad (filter, "sink");
aux_src = gst_element_get_static_pad (filter, "src");
g_signal_connect (G_OBJECT (aux_sink), "unlinked", G_CALLBACK (sink_unlinked), filter );
g_signal_connect (G_OBJECT (aux_src), "unlinked", G_CALLBACK (src_unlinked), filter );
gst_bin_add (container, filter);
gst_element_sync_state_with_parent (filter);
if (gst_pad_link (aux_src, sink) == GST_PAD_LINK_OK) {
if (gst_pad_link (src, aux_sink) == GST_PAD_LINK_OK)
ret = true;
else
gst_pad_unlink (aux_src, sink);
}
g_object_unref (aux_sink);
g_object_unref (aux_src);
gst_debug_bin_to_dot_file_with_ts (GST_BIN (container), GST_DEBUG_GRAPH_SHOW_ALL, "loopback");
} else {
if (gst_pad_link (src, sink) == GST_PAD_LINK_OK)
ret = true;
}
if (ret == true) {
connectedSrc = std::weak_ptr<MediaSrc> (mediaSrc);
} else {
gst_element_release_request_pad (getElement(), sink);
}
end:
g_object_unref (sink);
mutex.unlock();
return ret;
}
bool
MediaSinkImpl::linkPad (std::shared_ptr<MediaSourceImpl> mediaSrc, GstPad *src)
{
RecMutex::Lock lock (mutex);
std::shared_ptr<MediaSourceImpl> connectedSrcLocked;
GstPad *sink;
bool ret = false;
try {
connectedSrcLocked = connectedSrc.lock();
} catch (const std::bad_weak_ptr &e) {
}
if ( (sink = gst_element_get_static_pad (getGstreamerElement(),
getPadName().c_str() ) ) == NULL) {
sink = gst_element_get_request_pad (getGstreamerElement(),
getPadName().c_str() );
}
if (gst_pad_is_linked (sink) ) {
unlink (connectedSrcLocked, sink);
}
if (std::dynamic_pointer_cast<MediaObjectImpl> (mediaSrc)->getParent() ==
getParent() ) {
GstBin *container;
GstElement *filter, *parent;
GstPad *aux_sink, *aux_src;
GST_DEBUG ("Connecting loopback, adding a capsfilter to allow connection");
parent = GST_ELEMENT (GST_OBJECT_PARENT (sink) );
if (parent == NULL) {
goto end;
}
container = GST_BIN (GST_OBJECT_PARENT (parent) );
if (container == NULL) {
goto end;
}
filter = gst_element_factory_make ("capsfilter", NULL);
aux_sink = gst_element_get_static_pad (filter, "sink");
aux_src = gst_element_get_static_pad (filter, "src");
g_signal_connect (G_OBJECT (aux_sink), "unlinked", G_CALLBACK (sink_unlinked),
filter );
g_signal_connect (G_OBJECT (aux_src), "unlinked", G_CALLBACK (src_unlinked),
filter );
gst_bin_add (container, filter);
gst_element_sync_state_with_parent (filter);
if (gst_pad_link_full (aux_src, sink,
GST_PAD_LINK_CHECK_NOTHING) == GST_PAD_LINK_OK) {
if (gst_pad_link_full (src, aux_sink,
GST_PAD_LINK_CHECK_NOTHING) == GST_PAD_LINK_OK) {
ret = true;
} else {
gst_pad_unlink (aux_src, sink);
}
}
g_object_unref (aux_sink);
g_object_unref (aux_src);
gst_debug_bin_to_dot_file_with_ts (GST_BIN (container),
GST_DEBUG_GRAPH_SHOW_ALL, "loopback");
} else {
if (gst_pad_link_full (src, sink,
GST_PAD_LINK_CHECK_NOTHING) == GST_PAD_LINK_OK) {
ret = true;
}
}
if (ret == true) {
connectedSrc = std::weak_ptr<MediaSourceImpl> (mediaSrc);
} else {
gst_element_release_request_pad (getGstreamerElement(), sink);
}
end:
g_object_unref (sink);
return ret;
}
