tests/sched/dynamic-pipeline.c

#include <gst/gst.h>

/* This test will fail because it tries to allocate two cothread_context's in
 * one thread. This will cause a segfault. This is a problem with gstreamer's
 * cothreading that is fixed in the newer cothreads package.
 */

int
main (int argc, char *argv[])
{
  GstElement *fakesrc, *fakesink1, *fakesink2, *pipe1, *pipe2;

  gst_init (&argc, &argv);

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

  fakesrc = gst_element_factory_make ("fakesrc", "fakesrc");
  fakesink1 = gst_element_factory_make ("fakesink", "fakesink1");
  fakesink2 = gst_element_factory_make ("fakesink", "fakesink2");

  /* a crucial part of this test (and one that the old cothreads fails on) is
     having two active pipelines in the same thread. */
  pipe1 = gst_pipeline_new ("pipe1");
  pipe2 = gst_pipeline_new ("pipe2");

  /* make the first pipeline */
  gst_bin_add (GST_BIN (pipe1), fakesrc);
  gst_bin_add (GST_BIN (pipe1), fakesink1);
  gst_element_link_pads (fakesrc, "src", fakesink1, "sink");

  /* initialize cothreads */
  gst_element_set_state (pipe1, GST_STATE_PLAYING);

  gst_element_set_state (pipe1, GST_STATE_READY);

  /* destroy the fakesink, but keep fakesrc (its state is GST_STATE_READY) */
  gst_element_unlink_pads (fakesrc, "src", fakesink1, "sink");
  gst_object_ref (fakesrc);
  gst_bin_remove (GST_BIN (pipe1), fakesrc);
  g_usleep (2 * G_USEC_PER_SEC);
  gst_bin_remove (GST_BIN (pipe1), fakesink1);

  gst_object_unref (pipe1);

  /* make a new pipeline */
  gst_bin_add (GST_BIN (pipe2), fakesink2);

  /* don't change the new pipeline's state, it should change on the bin_add */
  gst_bin_add (GST_BIN (pipe2), fakesrc);
  gst_element_link_pads (fakesrc, "src", fakesink2, "sink");

  /* show the pipeline state */
  gst_xml_write_file (GST_ELEMENT (pipe2), stdout);

  /* try to iterate the pipeline */
  gst_element_set_state (pipe2, GST_STATE_PLAYING);
  g_usleep (2 * G_USEC_PER_SEC);
  gst_element_set_state (pipe2, GST_STATE_NULL);

  return 0;
}