tests/check/gst/gstpipeline.c - imx-gstreamer - Git at Google

 /* GStreamer
  * Copyright (C) 2005 Thomas Vander Stichele <thomas at apestaart dot org>
  *
  * gstpipeline.c: Unit test for GstPipeline
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public
  * License along with this library; if not, write to the
  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  * Boston, MA 02111-1307, USA.
  */

 #include <gst/check/gstcheck.h>

 #define WAIT_TIME (300 * GST_MSECOND)

 /* an empty pipeline can go to PLAYING in one go */
 GST_START_TEST (test_async_state_change_empty)
 {
   GstPipeline *pipeline;

   pipeline = GST_PIPELINE (gst_pipeline_new (NULL));
   fail_unless (pipeline != NULL, "Could not create pipeline");

   fail_unless_equals_int (gst_element_set_state (GST_ELEMENT (pipeline),
           GST_STATE_PLAYING), GST_STATE_CHANGE_SUCCESS);

   gst_object_unref (pipeline);
 }

 GST_END_TEST;

 GST_START_TEST (test_async_state_change_fake_ready)
 {
   GstPipeline *pipeline;
   GstElement *src, *sink;

   pipeline = GST_PIPELINE (gst_pipeline_new (NULL));
   fail_unless (pipeline != NULL, "Could not create pipeline");

   src = gst_element_factory_make ("fakesrc", NULL);
   sink = gst_element_factory_make ("fakesink", NULL);

   gst_bin_add_many (GST_BIN (pipeline), src, sink, NULL);
   gst_element_link (src, sink);

   fail_unless_equals_int (gst_element_set_state (GST_ELEMENT (pipeline),
           GST_STATE_READY), GST_STATE_CHANGE_SUCCESS);

   gst_object_unref (pipeline);
 }

 GST_END_TEST;


 GST_START_TEST (test_async_state_change_fake)
 {
   GstPipeline *pipeline;
   GstElement *src, *sink;
   GstBus *bus;
   gboolean done = FALSE;

   pipeline = GST_PIPELINE (gst_pipeline_new (NULL));
   fail_unless (pipeline != NULL, "Could not create pipeline");

   src = gst_element_factory_make ("fakesrc", NULL);
   sink = gst_element_factory_make ("fakesink", NULL);

   gst_bin_add_many (GST_BIN (pipeline), src, sink, NULL);
   gst_element_link (src, sink);

   bus = gst_pipeline_get_bus (pipeline);

   fail_unless_equals_int (gst_element_set_state (GST_ELEMENT (pipeline),
           GST_STATE_PLAYING), GST_STATE_CHANGE_ASYNC);

   while (!done) {
     GstMessage *message;
     GstState old, new, pending;

     message = gst_bus_poll (bus, GST_MESSAGE_STATE_CHANGED, -1);
     if (message) {
       gst_message_parse_state_changed (message, &old, &new, &pending);
       GST_DEBUG_OBJECT (message->src, "state change from %d to %d", old, new);
       if (message->src == GST_OBJECT (pipeline) && new == GST_STATE_PLAYING)
         done = TRUE;
       gst_message_unref (message);
     }
   }

   fail_unless_equals_int (gst_element_set_state (GST_ELEMENT (pipeline),
           GST_STATE_NULL), GST_STATE_CHANGE_SUCCESS);

   gst_object_unref (bus);
   gst_object_unref (pipeline);
 }

 GST_END_TEST;

 GST_START_TEST (test_get_bus)
 {
   GstPipeline *pipeline;
   GstBus *bus;

   pipeline = GST_PIPELINE (gst_pipeline_new (NULL));
   fail_unless (pipeline != NULL, "Could not create pipeline");
   ASSERT_OBJECT_REFCOUNT (pipeline, "pipeline", 1);

   bus = gst_pipeline_get_bus (pipeline);
   ASSERT_OBJECT_REFCOUNT (pipeline, "pipeline after get_bus", 1);
   ASSERT_OBJECT_REFCOUNT (bus, "bus", 2);

   gst_object_unref (pipeline);

   ASSERT_OBJECT_REFCOUNT (bus, "bus after unref pipeline", 1);
   gst_object_unref (bus);
 }

 GST_END_TEST;

 GMainLoop *loop = NULL;

 gboolean
 message_received (GstBus * bus, GstMessage * message, gpointer data)
 {
   GstElement *pipeline = GST_ELEMENT (data);
   GstMessageType type = message->type;

   GST_DEBUG ("message received");
   switch (type) {
     case GST_MESSAGE_STATE_CHANGED:
     {
       GstState old, new, pending;

       GST_DEBUG ("state change message received");
       gst_message_parse_state_changed (message, &old, &new, &pending);
       GST_DEBUG ("new state %d", new);
       if (message->src == GST_OBJECT (pipeline) && new == GST_STATE_PLAYING) {
         GST_DEBUG ("quitting main loop");
         g_main_loop_quit (loop);
       }
     }
       break;
     case GST_MESSAGE_ERROR:
     {
       g_print ("error\n");
     }
       break;
     default:
       break;
   }

   return TRUE;
 }

 GST_START_TEST (test_bus)
 {
   GstElement *pipeline;
   GstElement *src, *sink;
   GstBus *bus;
   guint id;
   GstState current;
   GstStateChangeReturn ret;

   pipeline = gst_pipeline_new (NULL);
   fail_unless (pipeline != NULL, "Could not create pipeline");
   ASSERT_OBJECT_REFCOUNT (pipeline, "pipeline", 1);

   src = gst_element_factory_make ("fakesrc", NULL);
   fail_unless (src != NULL);
   sink = gst_element_factory_make ("fakesink", NULL);
   fail_unless (sink != NULL);

   gst_bin_add_many (GST_BIN (pipeline), src, sink, NULL);
   fail_unless (gst_element_link (src, sink));

   bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
   ASSERT_OBJECT_REFCOUNT (pipeline, "pipeline after get_bus", 1);
   ASSERT_OBJECT_REFCOUNT (bus, "bus", 2);

   id = gst_bus_add_watch (bus, message_received, pipeline);
   ASSERT_OBJECT_REFCOUNT (pipeline, "pipeline after add_watch", 1);
   ASSERT_OBJECT_REFCOUNT (bus, "bus after add_watch", 3);

   ret = gst_element_set_state (pipeline, GST_STATE_PLAYING);
   fail_unless (ret == GST_STATE_CHANGE_ASYNC);

   loop = g_main_loop_new (NULL, FALSE);
   GST_DEBUG ("going into main loop");
   g_main_loop_run (loop);
   GST_DEBUG ("left main loop");

   /* PLAYING now */

   ASSERT_OBJECT_REFCOUNT_BETWEEN (pipeline, "pipeline after gone to playing", 1,
       3);

   /* cleanup */
   GST_DEBUG ("cleanup");

   ret = gst_element_set_state (pipeline, GST_STATE_NULL);
   fail_unless (ret == GST_STATE_CHANGE_SUCCESS);
   ret = gst_element_get_state (pipeline, &current, NULL, GST_CLOCK_TIME_NONE);
   fail_unless (ret == GST_STATE_CHANGE_SUCCESS);
   fail_unless (current == GST_STATE_NULL, "state is not NULL but %d", current);

   ASSERT_OBJECT_REFCOUNT (pipeline, "pipeline at start of cleanup", 1);
   ASSERT_OBJECT_REFCOUNT (bus, "bus at start of cleanup", 3);

   fail_unless (g_source_remove (id));
   ASSERT_OBJECT_REFCOUNT (bus, "bus after removing source", 2);

   GST_DEBUG ("unreffing pipeline");
   gst_object_unref (pipeline);

   ASSERT_OBJECT_REFCOUNT (bus, "bus after unref pipeline", 1);
   gst_object_unref (bus);
 }

 GST_END_TEST;

 static GMutex *probe_lock;
 static GCond *probe_cond;

 static gboolean
 sink_pad_probe (GstPad * pad, GstBuffer * buffer,
     GstClockTime * first_timestamp)
 {
   fail_if (GST_BUFFER_TIMESTAMP (buffer) == GST_CLOCK_TIME_NONE,
       "testing if buffer timestamps are right, but got CLOCK_TIME_NONE");

   if (*first_timestamp == GST_CLOCK_TIME_NONE) {
     *first_timestamp = GST_BUFFER_TIMESTAMP (buffer);
   }

   g_mutex_lock (probe_lock);
   g_cond_signal (probe_cond);
   g_mutex_unlock (probe_lock);

   return TRUE;
 }

 GST_START_TEST (test_base_time)
 {
   GstElement *pipeline, *fakesrc, *fakesink;
   GstPad *sink;
   GstClockTime observed, lower, upper, base, stream;
   GstClock *clock;

   pipeline = gst_element_factory_make ("pipeline", "pipeline");
   fakesrc = gst_element_factory_make ("fakesrc", "fakesrc");
   fakesink = gst_element_factory_make ("fakesink", "fakesink");

   fail_unless (pipeline && fakesrc && fakesink, "couldn't make elements");

   g_object_set (fakesrc, "is-live", (gboolean) TRUE, NULL);

   gst_bin_add_many (GST_BIN (pipeline), fakesrc, fakesink, NULL);
   gst_element_link (fakesrc, fakesink);

   sink = gst_element_get_pad (fakesink, "sink");
   gst_pad_add_buffer_probe (sink, G_CALLBACK (sink_pad_probe), &observed);

   fail_unless (gst_element_set_state (pipeline, GST_STATE_PAUSED)
       == GST_STATE_CHANGE_NO_PREROLL, "expected no-preroll from live pipeline");

   clock = gst_system_clock_obtain ();
   fail_unless (clock && GST_IS_CLOCK (clock), "i want a clock dammit");
   gst_pipeline_use_clock (GST_PIPELINE (pipeline), clock);

   fail_unless (gst_pipeline_get_last_stream_time (GST_PIPELINE (pipeline)) == 0,
       "stream time doesn't start off at 0");

   probe_lock = g_mutex_new ();
   probe_cond = g_cond_new ();

   /* test the first: that base time is being distributed correctly, timestamps
      are correct relative to the running clock and base time */
   {
     lower = gst_clock_get_time (clock);

     observed = GST_CLOCK_TIME_NONE;

     gst_element_set_state (pipeline, GST_STATE_PLAYING);
     fail_unless (gst_element_get_state (pipeline, NULL, NULL,
             GST_CLOCK_TIME_NONE)
         == GST_STATE_CHANGE_SUCCESS, "failed state change");

     g_mutex_lock (probe_lock);
     while (observed == GST_CLOCK_TIME_NONE)
       g_cond_wait (probe_cond, probe_lock);
     g_mutex_unlock (probe_lock);

     /* now something a little more than lower was distributed as the base time,
      * and the buffer was timestamped between 0 and upper-base
      */

     base = gst_element_get_base_time (pipeline);
     fail_if (base == GST_CLOCK_TIME_NONE);

     /* set stream time */
     gst_element_set_state (pipeline, GST_STATE_PAUSED);

     /* pulling upper here makes sure that the pipeline's new stream time has
        already been computed */
     upper = gst_clock_get_time (clock);

     fail_unless (gst_element_get_state (pipeline, NULL, NULL,
             GST_CLOCK_TIME_NONE)
         == GST_STATE_CHANGE_NO_PREROLL, "failed state change");

     fail_if (observed == GST_CLOCK_TIME_NONE, "no timestamp recorded");

     fail_unless (base >= lower, "early base time: %" GST_TIME_FORMAT " < %"
         GST_TIME_FORMAT, GST_TIME_ARGS (base), GST_TIME_ARGS (lower));
     fail_unless (upper >= base, "bogus base time: %" GST_TIME_FORMAT " > %"
         GST_TIME_FORMAT, GST_TIME_ARGS (base), GST_TIME_ARGS (upper));

     stream = gst_pipeline_get_last_stream_time (GST_PIPELINE (pipeline));

     fail_unless (stream > 0, "bogus new stream time: %" GST_TIME_FORMAT " > %"
         GST_TIME_FORMAT, GST_TIME_ARGS (stream), GST_TIME_ARGS (0));
     fail_unless (stream <= upper,
         "bogus new stream time: %" GST_TIME_FORMAT " > %" GST_TIME_FORMAT,
         GST_TIME_ARGS (stream), GST_TIME_ARGS (upper));

     fail_unless (observed <= stream, "timestamps outrun stream time: %"
         GST_TIME_FORMAT " > %" GST_TIME_FORMAT,
         GST_TIME_ARGS (observed), GST_TIME_ARGS (stream));
     fail_unless (observed >= 0, "early timestamp: %" GST_TIME_FORMAT " < %"
         GST_TIME_FORMAT, GST_TIME_ARGS (observed),
         GST_TIME_ARGS (lower - base));
     fail_unless (observed <= upper - base,
         "late timestamp: %" GST_TIME_FORMAT " > %" GST_TIME_FORMAT,
         GST_TIME_ARGS (observed), GST_TIME_ARGS (upper - base));
   }

   /* test the second: that the base time is redistributed when we go to PLAYING
      again */
   {
     GstClockID clock_id;
     GstClockTime oldbase = base, oldstream = stream;

     /* let some time pass */
     clock_id = gst_clock_new_single_shot_id (clock, upper + WAIT_TIME);
     fail_unless (gst_clock_id_wait (clock_id, NULL) == GST_CLOCK_OK,
         "unexpected clock_id_wait return");
     gst_clock_id_unref (clock_id);

     lower = gst_clock_get_time (clock);
     fail_if (lower == GST_CLOCK_TIME_NONE);

     observed = GST_CLOCK_TIME_NONE;

     fail_unless (lower >= upper + WAIT_TIME, "clock did not advance?");

     gst_element_set_state (pipeline, GST_STATE_PLAYING);
     fail_unless (gst_element_get_state (pipeline, NULL, NULL,
             GST_CLOCK_TIME_NONE)
         == GST_STATE_CHANGE_SUCCESS, "failed state change");

     g_mutex_lock (probe_lock);
     while (observed == GST_CLOCK_TIME_NONE)
       g_cond_wait (probe_cond, probe_lock);
     g_mutex_unlock (probe_lock);

     /* now the base time should have advanced by more than WAIT_TIME compared
      * to what it was. The buffer will be timestamped between the last stream
      * time and upper minus base.
      */

     base = gst_element_get_base_time (pipeline);
     fail_if (base == GST_CLOCK_TIME_NONE);

     /* set stream time */
     gst_element_set_state (pipeline, GST_STATE_PAUSED);

     /* new stream time already set */
     upper = gst_clock_get_time (clock);

     fail_unless (gst_element_get_state (pipeline, NULL, NULL,
             GST_CLOCK_TIME_NONE)
         == GST_STATE_CHANGE_NO_PREROLL, "failed state change");

     fail_if (observed == GST_CLOCK_TIME_NONE, "no timestamp recorded");

     stream = gst_pipeline_get_last_stream_time (GST_PIPELINE (pipeline));

     fail_unless (base >= oldbase + WAIT_TIME, "base time not reset");
     fail_unless (upper >= base + stream, "bogus base time: %"
         GST_TIME_FORMAT " > %" GST_TIME_FORMAT, GST_TIME_ARGS (base),
         GST_TIME_ARGS (upper));

     fail_unless (lower >= base);
     fail_unless (observed >= lower - base, "early timestamp: %"
         GST_TIME_FORMAT " < %" GST_TIME_FORMAT,
         GST_TIME_ARGS (observed), GST_TIME_ARGS (lower - base));
     fail_unless (observed <= upper - base, "late timestamp: %"
         GST_TIME_FORMAT " > %" GST_TIME_FORMAT,
         GST_TIME_ARGS (observed), GST_TIME_ARGS (upper - base));
     fail_unless (stream - oldstream <= upper - lower,
         "insufficient stream time: %" GST_TIME_FORMAT " > %" GST_TIME_FORMAT,
         GST_TIME_ARGS (observed), GST_TIME_ARGS (upper));
   }

   /* test the third: that if I set CLOCK_TIME_NONE as the stream time, that the
      base time is not changed */
   {
     GstClockID clock_id;
     GstClockTime oldbase = base, oldobserved = observed;
     GstClockReturn ret;

     /* let some time pass */
     clock_id = gst_clock_new_single_shot_id (clock, upper + WAIT_TIME);
     ret = gst_clock_id_wait (clock_id, NULL);
     fail_unless (ret == GST_CLOCK_OK,
         "unexpected clock_id_wait return %d", ret);
     gst_clock_id_unref (clock_id);

     lower = gst_clock_get_time (clock);

     observed = GST_CLOCK_TIME_NONE;

     fail_unless (lower >= upper + WAIT_TIME, "clock did not advance?");

     /* bling */
     gst_pipeline_set_new_stream_time (GST_PIPELINE (pipeline),
         GST_CLOCK_TIME_NONE);

     gst_element_set_state (pipeline, GST_STATE_PLAYING);
     fail_unless (gst_element_get_state (pipeline, NULL, NULL,
             GST_CLOCK_TIME_NONE)
         == GST_STATE_CHANGE_SUCCESS, "failed state change");

     g_mutex_lock (probe_lock);
     while (observed == GST_CLOCK_TIME_NONE)
       g_cond_wait (probe_cond, probe_lock);
     g_mutex_unlock (probe_lock);

     /* now the base time should be the same as it was, and the timestamp should
      * be more than WAIT_TIME past what it was.
      */

     base = gst_element_get_base_time (pipeline);

     /* set stream time */
     gst_element_set_state (pipeline, GST_STATE_PAUSED);

     /* new stream time already set */
     upper = gst_clock_get_time (clock);

     fail_unless (gst_element_get_state (pipeline, NULL, NULL,
             GST_CLOCK_TIME_NONE)
         == GST_STATE_CHANGE_NO_PREROLL, "failed state change");

     fail_if (observed == GST_CLOCK_TIME_NONE, "no timestamp recorded");

     fail_unless (gst_pipeline_get_last_stream_time (GST_PIPELINE (pipeline))
         == GST_CLOCK_TIME_NONE, "stream time was reset");

     fail_unless (base == oldbase, "base time was reset");

     fail_unless (observed >= lower - base, "early timestamp: %"
         GST_TIME_FORMAT " < %" GST_TIME_FORMAT,
         GST_TIME_ARGS (observed), GST_TIME_ARGS (lower - base));
     fail_unless (observed <= upper - base, "late timestamp: %"
         GST_TIME_FORMAT " > %" GST_TIME_FORMAT,
         GST_TIME_ARGS (observed), GST_TIME_ARGS (upper - base));
     fail_unless (observed - oldobserved >= WAIT_TIME,
         "insufficient tstamp delta: %" GST_TIME_FORMAT " > %" GST_TIME_FORMAT,
         GST_TIME_ARGS (observed), GST_TIME_ARGS (oldobserved));
   }

   gst_object_unref (sink);
   gst_object_unref (clock);
   gst_object_unref (pipeline);
 }

 GST_END_TEST;

 Suite *
 gst_pipeline_suite (void)
 {
   Suite *s = suite_create ("GstPipeline");
   TCase *tc_chain = tcase_create ("pipeline tests");

   tcase_set_timeout (tc_chain, 0);

   suite_add_tcase (s, tc_chain);
   tcase_add_test (tc_chain, test_async_state_change_empty);
   tcase_add_test (tc_chain, test_async_state_change_fake_ready);
   tcase_add_test (tc_chain, test_async_state_change_fake);
   tcase_add_test (tc_chain, test_get_bus);
   tcase_add_test (tc_chain, test_bus);
   tcase_add_test (tc_chain, test_base_time);

   return s;
 }

 GST_CHECK_MAIN (gst_pipeline);
	/* GStreamer
	* Copyright (C) 2005 Thomas Vander Stichele <thomas at apestaart dot org>
	*
	* gstpipeline.c: Unit test for GstPipeline
	*
	* This library is free software; you can redistribute it and/or
	* modify it under the terms of the GNU Library General Public
	* License as published by the Free Software Foundation; either
	* version 2 of the License, or (at your option) any later version.
	*
	* This library is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* Library General Public License for more details.
	*
	* You should have received a copy of the GNU Library General Public
	* License along with this library; if not, write to the
	* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
	* Boston, MA 02111-1307, USA.
	*/

	#include <gst/check/gstcheck.h>

	#define WAIT_TIME (300 * GST_MSECOND)

	/* an empty pipeline can go to PLAYING in one go */
	GST_START_TEST (test_async_state_change_empty)
	{
	GstPipeline *pipeline;

	pipeline = GST_PIPELINE (gst_pipeline_new (NULL));
	fail_unless (pipeline != NULL, "Could not create pipeline");

	fail_unless_equals_int (gst_element_set_state (GST_ELEMENT (pipeline),
	GST_STATE_PLAYING), GST_STATE_CHANGE_SUCCESS);

	gst_object_unref (pipeline);
	}

	GST_END_TEST;

	GST_START_TEST (test_async_state_change_fake_ready)
	{
	GstPipeline *pipeline;
	GstElement src, sink;

	pipeline = GST_PIPELINE (gst_pipeline_new (NULL));
	fail_unless (pipeline != NULL, "Could not create pipeline");

	src = gst_element_factory_make ("fakesrc", NULL);
	sink = gst_element_factory_make ("fakesink", NULL);

	gst_bin_add_many (GST_BIN (pipeline), src, sink, NULL);
	gst_element_link (src, sink);

	fail_unless_equals_int (gst_element_set_state (GST_ELEMENT (pipeline),
	GST_STATE_READY), GST_STATE_CHANGE_SUCCESS);

	gst_object_unref (pipeline);
	}

	GST_END_TEST;


	GST_START_TEST (test_async_state_change_fake)
	{
	GstPipeline *pipeline;
	GstElement src, sink;
	GstBus *bus;
	gboolean done = FALSE;

	pipeline = GST_PIPELINE (gst_pipeline_new (NULL));
	fail_unless (pipeline != NULL, "Could not create pipeline");

	src = gst_element_factory_make ("fakesrc", NULL);
	sink = gst_element_factory_make ("fakesink", NULL);

	gst_bin_add_many (GST_BIN (pipeline), src, sink, NULL);
	gst_element_link (src, sink);

	bus = gst_pipeline_get_bus (pipeline);

	fail_unless_equals_int (gst_element_set_state (GST_ELEMENT (pipeline),
	GST_STATE_PLAYING), GST_STATE_CHANGE_ASYNC);

	while (!done) {
	GstMessage *message;
	GstState old, new, pending;

	message = gst_bus_poll (bus, GST_MESSAGE_STATE_CHANGED, -1);
	if (message) {
	gst_message_parse_state_changed (message, &old, &new, &pending);
	GST_DEBUG_OBJECT (message->src, "state change from %d to %d", old, new);
	if (message->src == GST_OBJECT (pipeline) && new == GST_STATE_PLAYING)
	done = TRUE;
	gst_message_unref (message);
	}
	}

	fail_unless_equals_int (gst_element_set_state (GST_ELEMENT (pipeline),
	GST_STATE_NULL), GST_STATE_CHANGE_SUCCESS);

	gst_object_unref (bus);
	gst_object_unref (pipeline);
	}

	GST_END_TEST;

	GST_START_TEST (test_get_bus)
	{
	GstPipeline *pipeline;
	GstBus *bus;

	pipeline = GST_PIPELINE (gst_pipeline_new (NULL));
	fail_unless (pipeline != NULL, "Could not create pipeline");
	ASSERT_OBJECT_REFCOUNT (pipeline, "pipeline", 1);

	bus = gst_pipeline_get_bus (pipeline);
	ASSERT_OBJECT_REFCOUNT (pipeline, "pipeline after get_bus", 1);
	ASSERT_OBJECT_REFCOUNT (bus, "bus", 2);

	gst_object_unref (pipeline);

	ASSERT_OBJECT_REFCOUNT (bus, "bus after unref pipeline", 1);
	gst_object_unref (bus);
	}

	GST_END_TEST;

	GMainLoop *loop = NULL;

	gboolean
	message_received (GstBus * bus, GstMessage * message, gpointer data)
	{
	GstElement *pipeline = GST_ELEMENT (data);
	GstMessageType type = message->type;

	GST_DEBUG ("message received");
	switch (type) {
	case GST_MESSAGE_STATE_CHANGED:
	{
	GstState old, new, pending;

	GST_DEBUG ("state change message received");
	gst_message_parse_state_changed (message, &old, &new, &pending);
	GST_DEBUG ("new state %d", new);
	if (message->src == GST_OBJECT (pipeline) && new == GST_STATE_PLAYING) {
	GST_DEBUG ("quitting main loop");
	g_main_loop_quit (loop);
	}
	}
	break;
	case GST_MESSAGE_ERROR:
	{
	g_print ("error\n");
	}
	break;
	default:
	break;
	}

	return TRUE;
	}

	GST_START_TEST (test_bus)
	{
	GstElement *pipeline;
	GstElement src, sink;
	GstBus *bus;
	guint id;
	GstState current;
	GstStateChangeReturn ret;

	pipeline = gst_pipeline_new (NULL);
	fail_unless (pipeline != NULL, "Could not create pipeline");
	ASSERT_OBJECT_REFCOUNT (pipeline, "pipeline", 1);

	src = gst_element_factory_make ("fakesrc", NULL);
	fail_unless (src != NULL);
	sink = gst_element_factory_make ("fakesink", NULL);
	fail_unless (sink != NULL);

	gst_bin_add_many (GST_BIN (pipeline), src, sink, NULL);
	fail_unless (gst_element_link (src, sink));

	bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
	ASSERT_OBJECT_REFCOUNT (pipeline, "pipeline after get_bus", 1);
	ASSERT_OBJECT_REFCOUNT (bus, "bus", 2);

	id = gst_bus_add_watch (bus, message_received, pipeline);
	ASSERT_OBJECT_REFCOUNT (pipeline, "pipeline after add_watch", 1);
	ASSERT_OBJECT_REFCOUNT (bus, "bus after add_watch", 3);

	ret = gst_element_set_state (pipeline, GST_STATE_PLAYING);
	fail_unless (ret == GST_STATE_CHANGE_ASYNC);

	loop = g_main_loop_new (NULL, FALSE);
	GST_DEBUG ("going into main loop");
	g_main_loop_run (loop);
	GST_DEBUG ("left main loop");

	/* PLAYING now */

	ASSERT_OBJECT_REFCOUNT_BETWEEN (pipeline, "pipeline after gone to playing", 1,
	3);

	/* cleanup */
	GST_DEBUG ("cleanup");

	ret = gst_element_set_state (pipeline, GST_STATE_NULL);
	fail_unless (ret == GST_STATE_CHANGE_SUCCESS);
	ret = gst_element_get_state (pipeline, &current, NULL, GST_CLOCK_TIME_NONE);
	fail_unless (ret == GST_STATE_CHANGE_SUCCESS);
	fail_unless (current == GST_STATE_NULL, "state is not NULL but %d", current);

	ASSERT_OBJECT_REFCOUNT (pipeline, "pipeline at start of cleanup", 1);
	ASSERT_OBJECT_REFCOUNT (bus, "bus at start of cleanup", 3);

	fail_unless (g_source_remove (id));
	ASSERT_OBJECT_REFCOUNT (bus, "bus after removing source", 2);

	GST_DEBUG ("unreffing pipeline");
	gst_object_unref (pipeline);

	ASSERT_OBJECT_REFCOUNT (bus, "bus after unref pipeline", 1);
	gst_object_unref (bus);
	}

	GST_END_TEST;

	static GMutex *probe_lock;
	static GCond *probe_cond;

	static gboolean
	sink_pad_probe (GstPad * pad, GstBuffer * buffer,
	GstClockTime * first_timestamp)
	{
	fail_if (GST_BUFFER_TIMESTAMP (buffer) == GST_CLOCK_TIME_NONE,
	"testing if buffer timestamps are right, but got CLOCK_TIME_NONE");

	if (*first_timestamp == GST_CLOCK_TIME_NONE) {
	*first_timestamp = GST_BUFFER_TIMESTAMP (buffer);
	}

	g_mutex_lock (probe_lock);
	g_cond_signal (probe_cond);
	g_mutex_unlock (probe_lock);

	return TRUE;
	}

	GST_START_TEST (test_base_time)
	{
	GstElement pipeline, fakesrc, *fakesink;
	GstPad *sink;
	GstClockTime observed, lower, upper, base, stream;
	GstClock *clock;

	pipeline = gst_element_factory_make ("pipeline", "pipeline");
	fakesrc = gst_element_factory_make ("fakesrc", "fakesrc");
	fakesink = gst_element_factory_make ("fakesink", "fakesink");

	fail_unless (pipeline && fakesrc && fakesink, "couldn't make elements");

	g_object_set (fakesrc, "is-live", (gboolean) TRUE, NULL);

	gst_bin_add_many (GST_BIN (pipeline), fakesrc, fakesink, NULL);
	gst_element_link (fakesrc, fakesink);

	sink = gst_element_get_pad (fakesink, "sink");
	gst_pad_add_buffer_probe (sink, G_CALLBACK (sink_pad_probe), &observed);

	fail_unless (gst_element_set_state (pipeline, GST_STATE_PAUSED)
	== GST_STATE_CHANGE_NO_PREROLL, "expected no-preroll from live pipeline");

	clock = gst_system_clock_obtain ();
	fail_unless (clock && GST_IS_CLOCK (clock), "i want a clock dammit");
	gst_pipeline_use_clock (GST_PIPELINE (pipeline), clock);

	fail_unless (gst_pipeline_get_last_stream_time (GST_PIPELINE (pipeline)) == 0,
	"stream time doesn't start off at 0");

	probe_lock = g_mutex_new ();
	probe_cond = g_cond_new ();

	/* test the first: that base time is being distributed correctly, timestamps
	are correct relative to the running clock and base time */
	{
	lower = gst_clock_get_time (clock);

	observed = GST_CLOCK_TIME_NONE;

	gst_element_set_state (pipeline, GST_STATE_PLAYING);
	fail_unless (gst_element_get_state (pipeline, NULL, NULL,
	GST_CLOCK_TIME_NONE)
	== GST_STATE_CHANGE_SUCCESS, "failed state change");

	g_mutex_lock (probe_lock);
	while (observed == GST_CLOCK_TIME_NONE)
	g_cond_wait (probe_cond, probe_lock);
	g_mutex_unlock (probe_lock);

	/* now something a little more than lower was distributed as the base time,
	* and the buffer was timestamped between 0 and upper-base
	*/

	base = gst_element_get_base_time (pipeline);
	fail_if (base == GST_CLOCK_TIME_NONE);

	/* set stream time */
	gst_element_set_state (pipeline, GST_STATE_PAUSED);

	/* pulling upper here makes sure that the pipeline's new stream time has
	already been computed */
	upper = gst_clock_get_time (clock);

	fail_unless (gst_element_get_state (pipeline, NULL, NULL,
	GST_CLOCK_TIME_NONE)
	== GST_STATE_CHANGE_NO_PREROLL, "failed state change");

	fail_if (observed == GST_CLOCK_TIME_NONE, "no timestamp recorded");

	fail_unless (base >= lower, "early base time: %" GST_TIME_FORMAT " < %"
	GST_TIME_FORMAT, GST_TIME_ARGS (base), GST_TIME_ARGS (lower));
	fail_unless (upper >= base, "bogus base time: %" GST_TIME_FORMAT " > %"
	GST_TIME_FORMAT, GST_TIME_ARGS (base), GST_TIME_ARGS (upper));

	stream = gst_pipeline_get_last_stream_time (GST_PIPELINE (pipeline));

	fail_unless (stream > 0, "bogus new stream time: %" GST_TIME_FORMAT " > %"
	GST_TIME_FORMAT, GST_TIME_ARGS (stream), GST_TIME_ARGS (0));
	fail_unless (stream <= upper,
	"bogus new stream time: %" GST_TIME_FORMAT " > %" GST_TIME_FORMAT,
	GST_TIME_ARGS (stream), GST_TIME_ARGS (upper));

	fail_unless (observed <= stream, "timestamps outrun stream time: %"
	GST_TIME_FORMAT " > %" GST_TIME_FORMAT,
	GST_TIME_ARGS (observed), GST_TIME_ARGS (stream));
	fail_unless (observed >= 0, "early timestamp: %" GST_TIME_FORMAT " < %"
	GST_TIME_FORMAT, GST_TIME_ARGS (observed),
	GST_TIME_ARGS (lower - base));
	fail_unless (observed <= upper - base,
	"late timestamp: %" GST_TIME_FORMAT " > %" GST_TIME_FORMAT,
	GST_TIME_ARGS (observed), GST_TIME_ARGS (upper - base));
	}

	/* test the second: that the base time is redistributed when we go to PLAYING
	again */
	{
	GstClockID clock_id;
	GstClockTime oldbase = base, oldstream = stream;

	/* let some time pass */
	clock_id = gst_clock_new_single_shot_id (clock, upper + WAIT_TIME);
	fail_unless (gst_clock_id_wait (clock_id, NULL) == GST_CLOCK_OK,
	"unexpected clock_id_wait return");
	gst_clock_id_unref (clock_id);

	lower = gst_clock_get_time (clock);
	fail_if (lower == GST_CLOCK_TIME_NONE);

	observed = GST_CLOCK_TIME_NONE;

	fail_unless (lower >= upper + WAIT_TIME, "clock did not advance?");

	gst_element_set_state (pipeline, GST_STATE_PLAYING);
	fail_unless (gst_element_get_state (pipeline, NULL, NULL,
	GST_CLOCK_TIME_NONE)
	== GST_STATE_CHANGE_SUCCESS, "failed state change");

	g_mutex_lock (probe_lock);
	while (observed == GST_CLOCK_TIME_NONE)
	g_cond_wait (probe_cond, probe_lock);
	g_mutex_unlock (probe_lock);

	/* now the base time should have advanced by more than WAIT_TIME compared
	* to what it was. The buffer will be timestamped between the last stream
	* time and upper minus base.
	*/

	base = gst_element_get_base_time (pipeline);
	fail_if (base == GST_CLOCK_TIME_NONE);

	/* set stream time */
	gst_element_set_state (pipeline, GST_STATE_PAUSED);

	/* new stream time already set */
	upper = gst_clock_get_time (clock);

	fail_unless (gst_element_get_state (pipeline, NULL, NULL,
	GST_CLOCK_TIME_NONE)
	== GST_STATE_CHANGE_NO_PREROLL, "failed state change");

	fail_if (observed == GST_CLOCK_TIME_NONE, "no timestamp recorded");

	stream = gst_pipeline_get_last_stream_time (GST_PIPELINE (pipeline));

	fail_unless (base >= oldbase + WAIT_TIME, "base time not reset");
	fail_unless (upper >= base + stream, "bogus base time: %"
	GST_TIME_FORMAT " > %" GST_TIME_FORMAT, GST_TIME_ARGS (base),
	GST_TIME_ARGS (upper));

	fail_unless (lower >= base);
	fail_unless (observed >= lower - base, "early timestamp: %"
	GST_TIME_FORMAT " < %" GST_TIME_FORMAT,
	GST_TIME_ARGS (observed), GST_TIME_ARGS (lower - base));
	fail_unless (observed <= upper - base, "late timestamp: %"
	GST_TIME_FORMAT " > %" GST_TIME_FORMAT,
	GST_TIME_ARGS (observed), GST_TIME_ARGS (upper - base));
	fail_unless (stream - oldstream <= upper - lower,
	"insufficient stream time: %" GST_TIME_FORMAT " > %" GST_TIME_FORMAT,
	GST_TIME_ARGS (observed), GST_TIME_ARGS (upper));
	}

	/* test the third: that if I set CLOCK_TIME_NONE as the stream time, that the
	base time is not changed */
	{
	GstClockID clock_id;
	GstClockTime oldbase = base, oldobserved = observed;
	GstClockReturn ret;

	/* let some time pass */
	clock_id = gst_clock_new_single_shot_id (clock, upper + WAIT_TIME);
	ret = gst_clock_id_wait (clock_id, NULL);
	fail_unless (ret == GST_CLOCK_OK,
	"unexpected clock_id_wait return %d", ret);
	gst_clock_id_unref (clock_id);

	lower = gst_clock_get_time (clock);

	observed = GST_CLOCK_TIME_NONE;

	fail_unless (lower >= upper + WAIT_TIME, "clock did not advance?");

	/* bling */
	gst_pipeline_set_new_stream_time (GST_PIPELINE (pipeline),
	GST_CLOCK_TIME_NONE);

	gst_element_set_state (pipeline, GST_STATE_PLAYING);
	fail_unless (gst_element_get_state (pipeline, NULL, NULL,
	GST_CLOCK_TIME_NONE)
	== GST_STATE_CHANGE_SUCCESS, "failed state change");

	g_mutex_lock (probe_lock);
	while (observed == GST_CLOCK_TIME_NONE)
	g_cond_wait (probe_cond, probe_lock);
	g_mutex_unlock (probe_lock);

	/* now the base time should be the same as it was, and the timestamp should
	* be more than WAIT_TIME past what it was.
	*/

	base = gst_element_get_base_time (pipeline);

	/* set stream time */
	gst_element_set_state (pipeline, GST_STATE_PAUSED);

	/* new stream time already set */
	upper = gst_clock_get_time (clock);

	fail_unless (gst_element_get_state (pipeline, NULL, NULL,
	GST_CLOCK_TIME_NONE)
	== GST_STATE_CHANGE_NO_PREROLL, "failed state change");

	fail_if (observed == GST_CLOCK_TIME_NONE, "no timestamp recorded");

	fail_unless (gst_pipeline_get_last_stream_time (GST_PIPELINE (pipeline))
	== GST_CLOCK_TIME_NONE, "stream time was reset");

	fail_unless (base == oldbase, "base time was reset");

	fail_unless (observed >= lower - base, "early timestamp: %"
	GST_TIME_FORMAT " < %" GST_TIME_FORMAT,
	GST_TIME_ARGS (observed), GST_TIME_ARGS (lower - base));
	fail_unless (observed <= upper - base, "late timestamp: %"
	GST_TIME_FORMAT " > %" GST_TIME_FORMAT,
	GST_TIME_ARGS (observed), GST_TIME_ARGS (upper - base));
	fail_unless (observed - oldobserved >= WAIT_TIME,
	"insufficient tstamp delta: %" GST_TIME_FORMAT " > %" GST_TIME_FORMAT,
	GST_TIME_ARGS (observed), GST_TIME_ARGS (oldobserved));
	}

	gst_object_unref (sink);
	gst_object_unref (clock);
	gst_object_unref (pipeline);
	}

	GST_END_TEST;

	Suite *
	gst_pipeline_suite (void)
	{
	Suite *s = suite_create ("GstPipeline");
	TCase *tc_chain = tcase_create ("pipeline tests");

	tcase_set_timeout (tc_chain, 0);

	suite_add_tcase (s, tc_chain);
	tcase_add_test (tc_chain, test_async_state_change_empty);
	tcase_add_test (tc_chain, test_async_state_change_fake_ready);
	tcase_add_test (tc_chain, test_async_state_change_fake);
	tcase_add_test (tc_chain, test_get_bus);
	tcase_add_test (tc_chain, test_bus);
	tcase_add_test (tc_chain, test_base_time);

	return s;
	}

	GST_CHECK_MAIN (gst_pipeline);