gstreamer/testsuite/refcounting/sched.c

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#include <gst/gst.h>
gint i = 0;
GstElement *pipeline;
GstPadChainFunction oss_chain;
static GstElement *
make_and_check_element (gchar * type, gchar * name)
{
GstElement *element = gst_element_factory_make (type, name);
if (element == NULL) {
g_warning
("Could not run test, because element type \"%s\" is not installed. Please retry when it is. Assuming it works for now...",
type);
exit (1);
}
return element;
}
static void
create_pipeline (void)
{
GstElement *src;
GstElement *sink;
GstElement *id;
pipeline = gst_pipeline_new ("pipeline");
src = make_and_check_element ("sinesrc", "src");
/**
* You need a sink with a loop-based element in here, if you want to kill opt, too.
* Osssink (chain-based) only breaks the basic scheduler.
*/
sink = make_and_check_element ("alsasink", "sink");
gst_bin_add_many (GST_BIN (pipeline), src, sink, NULL);
gst_element_link (src, sink);
/**
* now make the bug appear
* I believe it has something to do with 2 chains being created in the scheduler
* but I haven't looked at it yet
* If you comment out the next 4 lines, everything works fine.
* And no, it's not because of identity, you may use any other element.
*/
gst_element_unlink (src, sink);
id = make_and_check_element ("identity", "id");
gst_bin_add (GST_BIN (pipeline), id);
gst_element_link_many (src, id, sink, NULL);
/* This pipeline will not be removed properly once we unref it */
gst_element_set_state (pipeline, GST_STATE_PLAYING);
}
gint
main (gint argc, gchar * argv[])
{
gst_init (&argc, &argv);
create_pipeline ();
while (i < 300) {
/**
* only inc i when it works, so the program hangs when _iterate returns false,
* which it does after the first pipeline isn't unref'd properly and the next
* osssink refuses to work.
*/
if (gst_bin_iterate (GST_BIN (pipeline)))
i++;
if (i % 50 == 0) {
gst_object_unref (pipeline);
create_pipeline ();
}
}
return 0;
}