gstreamer/examples/xml/createxml.c

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

gboolean playing;

static void
object_saved (GstObject * object, xmlNodePtr parent, gpointer data)
{
  xmlNodePtr child;
  xmlNsPtr ns;

  /* first see if the namespace is already known */
  ns = xmlSearchNsByHref (parent->doc, parent,
      (guchar *) "http://gstreamer.net/gst-test/1.0/");
  if (ns == NULL) {
    xmlNodePtr root = xmlDocGetRootElement (parent->doc);

    /* add namespace to root node */
    ns = xmlNewNs (root, (guchar *) "http://gstreamer.net/gst-test/1.0/",
        (guchar *) "test");
  }
  child = xmlNewChild (parent, ns, (guchar *) "comment", NULL);

  xmlNewChild (child, NULL, (guchar *) "text", (guchar *) data);
}

int
main (int argc, char *argv[])
{
  GstElement *filesrc, *osssink, *queue, *queue2, *decode;
  GstElement *pipeline;
  GstElement *thread, *thread2;

  gst_init (&argc, &argv);

  if (argc != 2) {
    g_print ("usage: %s <filename>\n", argv[0]);
    exit (-1);
  }

  /* create new threads to hold the elements */
  thread = gst_element_factory_make ("thread", "thread");
  g_assert (thread != NULL);
  thread2 = gst_element_factory_make ("thread", "thread2");
  g_assert (thread2 != NULL);

  /* these signals will allow us to save custom tags with the gst xml output */
  g_signal_connect (G_OBJECT (thread), "object_saved",
      G_CALLBACK (object_saved), g_strdup ("decoder thread"));
  g_signal_connect (G_OBJECT (thread2), "object_saved",
      G_CALLBACK (object_saved), g_strdup ("render thread"));

  /* create a new bin to hold the elements */
  pipeline = gst_pipeline_new ("pipeline");
  g_assert (pipeline != NULL);

  /* create a disk reader */
  filesrc = gst_element_factory_make ("filesrc", "disk_source");
  g_assert (filesrc != NULL);
  g_object_set (G_OBJECT (filesrc), "location", argv[1], NULL);

  queue = gst_element_factory_make ("queue", "queue");
  queue2 = gst_element_factory_make ("queue", "queue2");

  /* and an audio sink */
  osssink = gst_element_factory_make ("osssink", "play_audio");
  g_assert (osssink != NULL);

  decode = gst_element_factory_make ("mad", "decode");
  g_assert (decode != NULL);

  /* add objects to the main pipeline */
  gst_bin_add (GST_BIN (pipeline), filesrc);
  gst_bin_add (GST_BIN (pipeline), queue);

  gst_bin_add (GST_BIN (thread), decode);
  gst_bin_add (GST_BIN (thread), queue2);

  gst_bin_add (GST_BIN (thread2), osssink);

  gst_element_link_many (filesrc, queue, decode, queue2, osssink, NULL);

  gst_bin_add (GST_BIN (pipeline), thread);
  gst_bin_add (GST_BIN (pipeline), thread2);

  /* write the bin to stdout */
  gst_xml_write_file (GST_ELEMENT (pipeline), stdout);

  /* write the bin to a file */
  gst_xml_write_file (GST_ELEMENT (pipeline), fopen ("xmlTest.gst", "w"));

  exit (0);
}