string
connection_start (string name, string session, bool again) {
// cout << "Start " << name << ", " << session << "\n";
if (!connection_declared (name))
return "Error: connection " * name * " has not been declared";
connection con= connection (name * "-" * session);
if (is_nil (con)) {
if (DEBUG_VERBOSE)
debug_io << "Starting session '" << session << "'\n";
tree t= connection_info (name, session);
if (is_tuple (t, "pipe", 1)) {
tm_link ln= make_pipe_link (t[1]->label);
con= tm_new<connection_rep> (name, session, ln);
}
#ifndef QTTEXMACS
else if (is_tuple (t, "socket", 2)) {
tm_link ln= make_socket_link (t[1]->label, as_int (t[2]->label));
con= tm_new<connection_rep> (name, session, ln);
}
#endif
else if (is_tuple (t, "dynlink", 3)) {
tm_link ln=
make_dynamic_link (t[1]->label, t[2]->label, t[3]->label, session);
con= tm_new<connection_rep> (name, session, ln);
}
}
return con->start (again);
}
gboolean
gst_editor_link_link (GstEditorLink * link)
{
GObject * src, *sink;
GstPad * srcpad = NULL, * sinkpad = NULL;
GooCanvasItem * item;
GooCanvasLineDash * dash;
g_return_val_if_fail (GST_IS_EDITOR_LINK (link), FALSE);
if (!link->srcpad || !link->sinkpad)
goto error;
src = (GObject *)GST_EDITOR_ITEM (link->srcpad)->object;
sink = (GObject *)GST_EDITOR_ITEM (link->sinkpad)->object;
if (!GST_EDITOR_PAD (link->srcpad)->istemplate) {
if (!GST_EDITOR_PAD (link->sinkpad)->istemplate) {
if (GST_PAD_PEER (src) || GST_PAD_PEER (sink)) {
/*if (GST_PAD_PEER (src) != (GstPad *) sink)
{
g_warning ("The src pad is linked, but not to the sink pad");
goto error;
}
if (GST_PAD_PEER (sink) != (GstPad *) src)
{
g_warning ("The sink pad is linked, but not to the src pad");
goto error;
} */
srcpad = GST_PAD (src);
sinkpad = GST_PAD (sink);
goto linked;
/* yay goto */
}
}
else if (GST_PAD_PEER (src)) {
/* the to pad is a template */
g_warning ("The src pad is linked, but not to the sink pad");
goto error;
}
}
else if (!GST_EDITOR_PAD (link->sinkpad)->istemplate && GST_PAD_PEER (sink)) {
/* from pad is a template */
g_warning ("The sink pad is linked, but not to the src pad");
goto error;
}
if (link->ghost) {
g_object_set (
G_OBJECT (GOO_CANVAS_ITEM (link)), "fill-color", "grey70", NULL);
goto linked;
}
else if (GST_IS_EDITOR_PAD_SOMETIMES (link->srcpad) ||
GST_IS_EDITOR_PAD_SOMETIMES (link->sinkpad)) {
make_dynamic_link (link);
g_object_set (
G_OBJECT (GOO_CANVAS_ITEM (link)), "fill-color", "grey50", NULL);
goto linked;
}
else {
if (!GST_EDITOR_PAD (link->srcpad)->istemplate) {
srcpad = GST_PAD (src);
}
else if (GST_IS_EDITOR_PAD_REQUEST (link->srcpad)) {
srcpad = gst_element_get_request_pad (
(GstElement *)GST_EDITOR_ITEM (
goo_canvas_item_get_parent (GOO_CANVAS_ITEM (link->srcpad)))
->object,
GST_PAD_TEMPLATE (src)->name_template);
/* the new_pad signal will cause a new pad to made automagically in the
element */
g_object_set (G_OBJECT (GOO_CANVAS_ITEM (link)), "src-pad",
gst_editor_item_get ((GstObject *)srcpad), NULL);
}
else {
goto error;
}
if (!srcpad)
goto error;
if (!GST_EDITOR_PAD (link->sinkpad)->istemplate) {
sinkpad = GST_PAD (sink);
} else if (GST_IS_EDITOR_PAD_REQUEST (link->sinkpad)) {
sinkpad = gst_element_get_request_pad (
(GstElement *)GST_EDITOR_ITEM (
goo_canvas_item_get_parent (GOO_CANVAS_ITEM (link->sinkpad)))
->object,
GST_PAD_TEMPLATE (sink)->name_template);
g_object_set (G_OBJECT (GOO_CANVAS_ITEM (link)), "sink-pad",
gst_editor_item_get ((GstObject *)sinkpad), NULL);
} else {
goto error;
}
if (!sinkpad)
goto error;
if (gst_pad_link (srcpad, sinkpad) == GST_PAD_LINK_OK) {
GstEditorBin * srcbin, *sinkbin;
g_object_set (
G_OBJECT (GOO_CANVAS_ITEM (link)), "fill-color", "black", NULL);
linked:
srcbin = sinkbin = NULL;
dash = goo_canvas_line_dash_new (0, NULL);
g_object_set (G_OBJECT (GOO_CANVAS_ITEM (link)), "line-dash", dash, NULL);
goo_canvas_line_dash_unref (dash);
g_signal_connect (link->srcpad, "position-changed",
G_CALLBACK (on_editor_pad_position_changed), G_OBJECT (link));
g_signal_connect (link->sinkpad, "position-changed",
G_CALLBACK (on_editor_pad_position_changed), G_OBJECT (link));
/* don't connect a signal on a ghost or dynamic link */
g_print (
"adding unlinked signal for src: %p and sink %p", srcpad, sinkpad);
if (srcpad && sinkpad) {
GST_CAT_DEBUG (gste_debug_cat,
"link pad signal (%s:%s from %s:%s) with link %p",
GST_DEBUG_PAD_NAME (srcpad), GST_DEBUG_PAD_NAME (sinkpad), link);
g_signal_connect (srcpad, "unlinked", G_CALLBACK (on_pad_unlink), link);
g_signal_connect (
sinkpad, "unlinked", G_CALLBACK (on_pad_unlink), link);
}
item = goo_canvas_item_get_parent (
goo_canvas_item_get_parent (GOO_CANVAS_ITEM (link->srcpad)));
if (GST_IS_EDITOR_BIN (item))
srcbin = GST_EDITOR_BIN (item);
item = goo_canvas_item_get_parent (
goo_canvas_item_get_parent (GOO_CANVAS_ITEM (link->sinkpad)));
if (GST_IS_EDITOR_BIN (item))
sinkbin = GST_EDITOR_BIN (item);
if (sinkbin)
sinkbin->links = g_list_prepend (sinkbin->links, link);
if (srcbin && sinkbin != srcbin)
srcbin->links = g_list_prepend (srcbin->links, link);
return TRUE;
}
}
error:
g_message ("could not link");
if (link->srcpad)
GST_EDITOR_PAD (link->srcpad)->link = NULL;
if (link->sinkpad)
GST_EDITOR_PAD (link->sinkpad)->link = NULL;
return FALSE;
}
