Add a partial gstreamer based audio decoder service.

Doesn't work yet.

Change-Id: Iebd085d68346cb73af8df59c84e8e52a17de2a52
Reviewed-by: Michael Goddard <michael.goddard@nokia.com>

src/plugins/gstreamer/audiodecoder/qgstreameraudiodecodercontrol.h

@@ -0,0 +1,94 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** 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.
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QGSTREAMERPLAYERCONTROL_H
+#define QGSTREAMERPLAYERCONTROL_H
+
+#include <QtCore/qobject.h>
+#include <QtCore/qstack.h>
+
+#include <qaudioformat.h>
+#include <qaudiobuffer.h>
+#include <private/qaudiodecoder_p.h>
+#include <private/qaudiodecodercontrol_p.h>
+
+#include <limits.h>
+
+
+QT_BEGIN_NAMESPACE
+
+class QGstreamerAudioDecoderSession;
+class QGstreamerAudioDecoderService;
+
+class QGstreamerAudioDecoderControl : public QAudioDecoderControl
+{
+    Q_OBJECT
+
+public:
+    QGstreamerAudioDecoderControl(QGstreamerAudioDecoderSession *session, QObject *parent = 0);
+    ~QGstreamerAudioDecoderControl();
+
+    QAudioDecoder::State state() const;
+
+    QString sourceFilename() const;
+    void setSourceFilename(const QString &fileName);
+
+    QIODevice* sourceDevice() const;
+    void setSourceDevice(QIODevice *device);
+
+    void start();
+    void stop();
+
+    QAudioFormat audioFormat() const;
+    void setAudioFormat(const QAudioFormat &format);
+
+    QAudioBuffer read(bool *ok);
+    bool bufferAvailable() const;
+
+private:
+    // Stuff goes here
+
+    QGstreamerAudioDecoderSession *m_session;
+};
+
+QT_END_NAMESPACE
+
+#endif