sinks.c

GStreamer是一个开源的多媒体框架库。利用它

/* GStreamer
 *
 * unit test for sinks
 *
 * Copyright (C) <2005> Wim Taymans <wim at fluendo dot com>
 *
 * 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>

static void
pop_state_change_message (GstBus * bus, GstElement * src, GstState old,
    GstState new, GstState pending)
{
  GstMessage *message = NULL;
  GstState _old, _new, _pending;

  message = gst_bus_poll (bus, GST_MESSAGE_STATE_CHANGED, GST_SECOND);
  fail_unless (message != NULL,
      "Expected state change message, but got nothing");

  gst_message_parse_state_changed (message, &_old, &_new, &_pending);

  fail_unless (GST_MESSAGE_SRC (message) == (GstObject *) src,
      "Unexpected state change order");
  fail_unless (old == _old, "Unexpected old state");
  fail_unless (new == _new, "Unexpected new state");
  fail_unless (pending == _pending, "Unexpected pending state");

  gst_message_unref (message);
}

/* a sink should go ASYNC to PAUSE. forcing PLAYING is possible */
GST_START_TEST (test_sink)
{
  GstElement *sink;
  GstStateChangeReturn ret;
  GstState current, pending;

  sink = gst_element_factory_make ("fakesink", "sink");

  ret = gst_element_set_state (sink, GST_STATE_PAUSED);
  fail_unless (ret == GST_STATE_CHANGE_ASYNC, "no async state return");

  ret = gst_element_set_state (sink, GST_STATE_PLAYING);
  fail_unless (ret == GST_STATE_CHANGE_ASYNC, "no forced async state change");

  ret = gst_element_get_state (sink, &current, &pending, 0);
  fail_unless (ret == GST_STATE_CHANGE_ASYNC, "not changing state async");
  fail_unless (current == GST_STATE_READY, "bad current state");
  fail_unless (pending == GST_STATE_PLAYING, "bad pending state");

  ret = gst_element_set_state (sink, GST_STATE_PAUSED);
  fail_unless (ret == GST_STATE_CHANGE_ASYNC, "no async going back to paused");

  ret = gst_element_set_state (sink, GST_STATE_READY);
  fail_unless (ret == GST_STATE_CHANGE_SUCCESS, "failed to go to ready");

  ret = gst_element_set_state (sink, GST_STATE_NULL);
  fail_unless (ret == GST_STATE_CHANGE_SUCCESS, "failed to go to null");

  gst_object_unref (sink);
}

GST_END_TEST
/* a sink should go ASYNC to PAUSE and PLAYING, when linking a src, it
 * should complete the state change. */
GST_START_TEST (test_sink_completion)
{
  GstElement *sink, *src;
  GstStateChangeReturn ret;
  GstState current, pending;

  sink = gst_element_factory_make ("fakesink", "sink");
  g_object_set (G_OBJECT (sink), "sync", TRUE, NULL);

  ret = gst_element_set_state (sink, GST_STATE_PLAYING);
  fail_unless (ret == GST_STATE_CHANGE_ASYNC, "no async state return");

  ret = gst_element_get_state (sink, &current, &pending, 0);
  fail_unless (ret == GST_STATE_CHANGE_ASYNC, "not changing state async");
  fail_unless (current == GST_STATE_READY, "bad current state");
  fail_unless (pending == GST_STATE_PLAYING, "bad pending state");

  src = gst_element_factory_make ("fakesrc", "src");
  g_object_set (G_OBJECT (src), "datarate", 200, "sizetype", 2, NULL);
  gst_element_link (src, sink);

  ret = gst_element_set_state (src, GST_STATE_PLAYING);
  fail_unless (ret == GST_STATE_CHANGE_SUCCESS, "no success state return");

  /* now wait for final state */
  ret = gst_element_get_state (sink, &current, &pending, GST_CLOCK_TIME_NONE);
  fail_unless (ret == GST_STATE_CHANGE_SUCCESS, "failed to change state");
  fail_unless (current == GST_STATE_PLAYING, "bad current state");
  fail_unless (pending == GST_STATE_VOID_PENDING, "bad pending state");

  ret = gst_element_set_state (sink, GST_STATE_NULL);
  fail_unless (ret == GST_STATE_CHANGE_SUCCESS, "failed to go to null");

  ret = gst_element_set_state (src, GST_STATE_NULL);
  fail_unless (ret == GST_STATE_CHANGE_SUCCESS, "failed to go to null");

  gst_object_unref (sink);
  gst_object_unref (src);
}

GST_END_TEST
/* a sink should go ASYNC to PAUSE. PAUSE should complete when
 * prerolled. */
GST_START_TEST (test_src_sink)
{
  GstElement *sink, *src, *pipeline;
  GstStateChangeReturn ret;
  GstState current, pending;
  GstPad *srcpad, *sinkpad;

  pipeline = gst_pipeline_new ("pipeline");
  src = gst_element_factory_make ("fakesrc", "src");
  sink = gst_element_factory_make ("fakesink", "sink");

  gst_bin_add (GST_BIN (pipeline), src);
  gst_bin_add (GST_BIN (pipeline), sink);

  srcpad = gst_element_get_pad (src, "src");
  sinkpad = gst_element_get_pad (sink, "sink");
  gst_pad_link (srcpad, sinkpad);
  gst_object_unref (srcpad);
  gst_object_unref (sinkpad);

  ret = gst_element_set_state (pipeline, GST_STATE_PAUSED);
  fail_unless (ret == GST_STATE_CHANGE_ASYNC, "no async state return");
  ret = gst_element_get_state (pipeline, NULL, NULL, GST_CLOCK_TIME_NONE);
  fail_unless (ret == GST_STATE_CHANGE_SUCCESS, "no success state return");

  ret = gst_element_set_state (pipeline, GST_STATE_PLAYING);
  fail_unless (ret == GST_STATE_CHANGE_SUCCESS, "cannot start play");

  ret =
      gst_element_get_state (pipeline, &current, &pending, GST_CLOCK_TIME_NONE);
  fail_unless (ret == GST_STATE_CHANGE_SUCCESS, "not playing");
  fail_unless (current == GST_STATE_PLAYING, "not playing");
  fail_unless (pending == GST_STATE_VOID_PENDING, "not playing");
  ret = gst_element_set_state (pipeline, GST_STATE_NULL);
  fail_unless (ret == GST_STATE_CHANGE_SUCCESS, "cannot null pipeline");

  gst_object_unref (pipeline);

}

GST_END_TEST
/* a pipeline with live source should return NO_PREROLL in
 * PAUSE. When removing the live source it should return ASYNC
 * from the sink */
GST_START_TEST (test_livesrc_remove)
{
  GstElement *sink, *src, *pipeline;
  GstStateChangeReturn ret;
  GstState current, pending;
  GstPad *srcpad, *sinkpad;

  pipeline = gst_pipeline_new ("pipeline");
  src = gst_element_factory_make ("fakesrc", "src");
  g_object_set (G_OBJECT (src), "is-live", TRUE, NULL);
  sink = gst_element_factory_make ("fakesink", "sink");

  gst_object_ref (src);
  gst_bin_add (GST_BIN (pipeline), src);
  gst_bin_add (GST_BIN (pipeline), sink);

  srcpad = gst_element_get_pad (src, "src");
  sinkpad = gst_element_get_pad (sink, "sink");
  gst_pad_link (srcpad, sinkpad);
  gst_object_unref (srcpad);
  gst_object_unref (sinkpad);

  ret = gst_element_set_state (pipeline, GST_STATE_PAUSED);
  fail_unless (ret == GST_STATE_CHANGE_NO_PREROLL,
      "no no_preroll state return");

  ret = gst_element_get_state (src, &current, &pending, GST_CLOCK_TIME_NONE);
  fail_unless (ret == GST_STATE_CHANGE_NO_PREROLL, "not paused");
  fail_unless (current == GST_STATE_PAUSED, "not paused");
  fail_unless (pending == GST_STATE_VOID_PENDING, "not playing");

  gst_bin_remove (GST_BIN (pipeline), src);

  ret = gst_element_set_state (src, GST_STATE_NULL);
  fail_unless (ret == GST_STATE_CHANGE_SUCCESS, "async going to null");
  gst_object_unref (src);

  ret = gst_element_get_state (pipeline, &current, &pending, 0);
  fail_unless (ret == GST_STATE_CHANGE_ASYNC, "not async");
  fail_unless (current == GST_STATE_PAUSED, "not paused");
  fail_unless (pending == GST_STATE_PAUSED, "not paused");

  ret = gst_element_set_state (pipeline, GST_STATE_NULL);
  fail_unless (ret == GST_STATE_CHANGE_SUCCESS, "async going to null");
  gst_object_unref (pipeline);
}

GST_END_TEST
/* the sink should go ASYNC to PAUSE. The live source should go
 * NO_PREROLL to PAUSE. the pipeline returns NO_PREROLL. An
 * attempt to go to PLAYING will return ASYNC. polling state
 * completion should return SUCCESS when the sink is gone to
 * PLAYING. */
GST_START_TEST (test_livesrc_sink)
{
  GstElement *sink, *src, *pipeline;
  GstStateChangeReturn ret;
  GstState current, pending;
  GstPad *srcpad, *sinkpad;
  GstBus *bus;

  pipeline = gst_pipeline_new ("pipeline");
  src = gst_element_factory_make ("fakesrc", "src");
  g_object_set (G_OBJECT (src), "is-live", TRUE, NULL);
  sink = gst_element_factory_make ("fakesink", "sink");

  gst_bin_add (GST_BIN (pipeline), src);
  gst_bin_add (GST_BIN (pipeline), sink);