test/states.c

#include <glib.h>
#include <gst/gst.h>

int main(int argc,char *argv[]) {
  GstBin *bin,
  GstElement *src, *identity, *sink;

  gst_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));
}