Moved general gstreamer helper classes into separate library.

Cleaned up configuration of gstreamer with a separate config
test.

Change-Id: I1ec9ee466233687fbcfdc544a12d9fce578e4379
Reviewed-on: http://codereview.qt-project.org/6459
Sanity-Review: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Michael Goddard <michael.goddard@nokia.com>

src/gsttools/qgstreamermessage.cpp

@@ -0,0 +1,93 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** This file may be used under the terms of the GNU Lesser General Public
+** License version 2.1 as published by the Free Software Foundation and
+** appearing in the file LICENSE.LGPL included in the packaging of this
+** file. Please review the following information to ensure the GNU Lesser
+** General Public License version 2.1 requirements will be met:
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License version 3.0 as published by the Free Software Foundation
+** and appearing in the file LICENSE.GPL included in the packaging of this
+** file. Please review the following information to ensure the GNU General
+** Public License version 3.0 requirements will be met:
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <gst/gst.h>
+
+#include "qgstreamermessage_p.h"
+
+
+static int wuchi = qRegisterMetaType<QGstreamerMessage>();
+
+
+/*!
+    \class gstreamer::QGstreamerMessage
+    \internal
+*/
+
+QGstreamerMessage::QGstreamerMessage():
+    m_message(0)
+{
+}
+
+QGstreamerMessage::QGstreamerMessage(GstMessage* message):
+    m_message(message)
+{
+    gst_message_ref(m_message);
+}
+
+QGstreamerMessage::QGstreamerMessage(QGstreamerMessage const& m):
+    m_message(m.m_message)
+{
+    gst_message_ref(m_message);
+}
+
+
+QGstreamerMessage::~QGstreamerMessage()
+{
+    if (m_message != 0)
+        gst_message_unref(m_message);
+}
+
+GstMessage* QGstreamerMessage::rawMessage() const
+{
+    return m_message;
+}
+
+QGstreamerMessage& QGstreamerMessage::operator=(QGstreamerMessage const& rhs)
+{
+    if (m_message != 0)
+        gst_message_unref(m_message);
+
+    if ((m_message = rhs.m_message) != 0)
+        gst_message_ref(m_message);
+
+    return *this;
+}