/*  This file is part of the KDE project.

    Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

    This library is free software: you can redistribute it and/or modify

    it under the terms of the GNU Lesser General Public License as published by

    the Free Software Foundation, either version 2.1 or 3 of the License.

    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 Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License

    along with this library.  If not, see <http://www.gnu.org/licenses/>.

*/

#ifndef Phonon_GSTREAMER_BACKEND_H

#define Phonon_GSTREAMER_BACKEND_H

#include "common.h"

#include "devicemanager.h"

#include "medianode.h"

#include <phonon/objectdescription.h>

#include <phonon/backendinterface.h>

#include <QtCore/QList>

#include <QtCore/QPointer>

#include <QtCore/QStringList>

#include <QtCore/QTimer>

#include <gst/gst.h>

QT_BEGIN_NAMESPACE

namespace Phonon

{

namespace Gstreamer

{

class AudioOutput;

class MediaNode;

class MediaObject;

class EffectManager;

class Backend : public QObject, public BackendInterface

{

    Q_OBJECT

    Q_INTERFACES(Phonon::BackendInterface)

public:

    enum DebugLevel {NoDebug, Warning, Info, Debug};

    Backend(QObject *parent = 0, const QVariantList & = QVariantList());

    virtual ~Backend();

    DeviceManager* deviceManager() const;

    EffectManager* effectManager() const;

    QObject *createObject(BackendInterface::Class, QObject *parent, const QList<QVariant> &args);

    bool isValid() const;

    bool supportsVideo() const;

    QStringList availableMimeTypes() const;

    QList<int> objectDescriptionIndexes(ObjectDescriptionType type) const;

    QHash<QByteArray, QVariant> objectDescriptionProperties(ObjectDescriptionType type, int index) const;

    bool startConnectionChange(QSet<QObject *>);

    bool connectNodes(QObject *, QObject *);

    bool disconnectNodes(QObject *, QObject *);

    bool endConnectionChange(QSet<QObject *>);

    DebugLevel debugLevel() const;

    void addBusWatcher(MediaObject* node);

    void removeBusWatcher(MediaObject* node);

    void logMessage(const QString &message, int priority = 2, QObject *obj=0) const;

    bool checkDependencies() const;

Q_SIGNALS:

    void objectDescriptionChanged(ObjectDescriptionType);

private Q_SLOTS:

    void handleBusMessage(Message);

private:

    static gboolean busCall(GstBus *bus, GstMessage *msg, gpointer data);

    QList<QPointer<AudioOutput> > m_audioOutputs;

    DeviceManager *m_deviceManager;

    EffectManager *m_effectManager;

    DebugLevel m_debugLevel;

    bool m_isValid;

};

}

} // namespace Phonon::Gstreamer

QT_END_NAMESPACE

#endif // Phonon_GSTREAMER_BACKEND_H