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#include <glib.h>
#include <gst/gst.h>
void added_child(GstObject *object,GstObject *child) {
g_print("added_child(): added child '%s' to '%s'\n",
gst_object_get_name(child),
gst_object_get_name(object));
}
void added_parent(GstObject *object,GstObject *parent) {
g_print("added_parent(): object '%s' has new parent '%s'\n",
gst_object_get_name(object),
gst_object_get_name(parent));
}
void list_pads(GstElement *element) {
GList *padlist;
padlist = gst_element_get_pad_list(element);
if (padlist == NULL)
g_print("%s has no pads...\n",gst_object_get_name(element));
else {
while (padlist) {
GstPad *pad = GST_PAD(padlist->data);
if (gst_pad_get_ghost_parent(pad) == GST_OBJECT(element))
g_print("'%s' had %s ghost pad '%s'\n",gst_object_get_name(element),
(gst_pad_get_direction(pad) == GST_PAD_SRC) ? "SRC" : "SINK",
gst_pad_get_name(pad));
else
g_print("'%s' had %s pad '%s'\n",gst_object_get_name(element),
(gst_pad_get_direction(pad) == GST_PAD_SRC) ? "SRC" : "SINK",
gst_pad_get_name(pad));
padlist = g_list_next(padlist);
}
}
}
int main(int argc,char *argv[]) {
GstElement *bin, *src, *binf, *filter1, *filter2, *sink;
GList *padlist;
gtk_init(&argc,&argv);
bin = gst_bin_new("bin");
src = gst_disksrc_new("fakesrc");
gst_disksrc_set_filename(src,"demo.mp3");
list_pads(src);
binf = gst_bin_new("binf");
filter1 = gst_fakefilter_new("filter1");
list_pads(filter1);
filter2 = gst_fakefilter_new("filter2");
list_pads(filter2);
sink = gst_fakesink_new("fakesink");
list_pads(sink);
gtk_signal_connect(GTK_OBJECT(bin),"object_added",
GTK_SIGNAL_FUNC(added_child),NULL);
gtk_signal_connect(GTK_OBJECT(binf),"object_added",
GTK_SIGNAL_FUNC(added_child),NULL);
gtk_signal_connect(GTK_OBJECT(binf),"parent_set",
GTK_SIGNAL_FUNC(added_parent),NULL);
gtk_signal_connect(GTK_OBJECT(src),"parent_set",
GTK_SIGNAL_FUNC(added_parent),NULL);
gtk_signal_connect(GTK_OBJECT(filter1),"parent_set",
GTK_SIGNAL_FUNC(added_parent),NULL);
gtk_signal_connect(GTK_OBJECT(filter2),"parent_set",
GTK_SIGNAL_FUNC(added_parent),NULL);
gtk_signal_connect(GTK_OBJECT(sink),"parent_set",
GTK_SIGNAL_FUNC(added_parent),NULL);
/* add filter1 to the subbin */
gst_bin_add(GST_BIN(binf),GST_ELEMENT(filter1));
gst_bin_add(GST_BIN(binf),GST_ELEMENT(filter2));
/* connect the two together */
gst_pad_connect(gst_element_get_pad(filter1,"src"),
gst_element_get_pad(filter2,"sink"));
/* export the pads */
gst_element_add_ghost_pad(binf,gst_element_get_pad(filter1,"sink"));
gst_element_add_ghost_pad(binf,gst_element_get_pad(filter2,"src"));
list_pads(binf);
/* add objects to the main pipeline */
gst_bin_add(GST_BIN(bin),GST_OBJECT(src));
gst_bin_add(GST_BIN(bin),GST_OBJECT(binf));
gst_bin_add(GST_BIN(bin),GST_OBJECT(sink));
/* connect src to binf */
gst_pad_connect(gst_element_get_pad(src,"src"),
gst_element_get_pad(binf,"sink"));
/* connect binf to sink */
gst_pad_connect(gst_element_get_pad(binf,"src"),
gst_element_get_pad(sink,"sink"));
gst_disksrc_push(GST_SRC(src));
gst_object_destroy(GST_OBJECT(src));
gst_object_destroy(GST_OBJECT(filter1));
gst_object_destroy(GST_OBJECT(filter2));
gst_object_destroy(GST_OBJECT(binf));
gst_object_destroy(GST_OBJECT(sink));
gst_object_destroy(GST_OBJECT(bin));
}
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