/*  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_MEDIAOBJECT_H

#define Phonon_GSTREAMER_MEDIAOBJECT_H

#include "backend.h"

#include "common.h"

#include "medianode.h"

#include <phonon/mediaobjectinterface.h>

#include <phonon/addoninterface.h>

#include <QtCore/QHash>

#include <QtCore/QString>

#include <QtCore/QVariant>

#include <QtCore/QObject>

#include <QtCore/QDate>

#include <QtCore/QEvent>

#include <QtCore/QUrl>

#include <gst/gst.h>

QT_BEGIN_NAMESPACE

class QTimer;

typedef QMultiMap<QString, QString> TagMap;

namespace Phonon

{

namespace Gstreamer

{

class VideoWidget;

class AudioPath;

class VideoPath;

class AudioOutput;

class MediaObject : public QObject, public MediaObjectInterface

#ifndef QT_NO_PHONON_MEDIACONTROLLER

        , public AddonInterface

#endif

        , public MediaNode

{

    friend class Stream;

    Q_OBJECT

    Q_INTERFACES(Phonon::MediaObjectInterface

#ifndef QT_NO_PHONON_MEDIACONTROLLER

                 Phonon::AddonInterface

#endif

                 Phonon::Gstreamer::MediaNode

    )

public:

    MediaObject(Backend *backend, QObject *parent);

    ~MediaObject();

    Phonon::State state() const;

    bool hasVideo() const;

    bool isSeekable() const;

    qint64 currentTime() const;

    qint32 tickInterval() const;

    void setTickInterval(qint32 newTickInterval);

    void play();

    void pause();

    void stop();

    void seek(qint64 time);

    QString errorString() const;

    Phonon::ErrorType errorType() const;

    QUrl url() const;

    qint64 totalTime() const;

    qint32 prefinishMark() const;

    void setPrefinishMark(qint32 newPrefinishMark);

    qint32 transitionTime() const;

    void setTransitionTime(qint32);

    qint64 remainingTime() const;

    void setSource(const MediaSource &source);

    void setNextSource(const MediaSource &source);

    MediaSource source() const;

    // No additional interfaces currently supported

#ifndef QT_NO_PHONON_MEDIACONTROLLER

    bool hasInterface(Interface) const;

    QVariant interfaceCall(Interface, int, const QList<QVariant> &);

#endif

    bool isLoading()

    {

        return m_loading;

    }

    bool audioAvailable()

    {

        return m_hasAudio;

    }

    bool videoAvailable()

    {

        return m_hasVideo;

    }

    GstElement *audioGraph()

    {

        return m_audioGraph;

    }

    GstElement *videoGraph()

    {

        return m_videoGraph;

    }

    GstElement *pipeline()

    {

        return m_pipeline;

    };

    gulong capsHandler()

    {

        return m_capsHandler;

    };

    void connectVideo(GstPad *videoPad);

    void connectAudio(GstPad *audioPad);

    void handleBusMessage(const Message &msg);

    void handleEndOfStream();

    void addMissingCodecName(const QString &codec) { m_missingCodecs.append(codec); }

    static void cb_newpad (GstElement *decodebin, GstPad *pad, gboolean last, gpointer data);

    static void cb_pad_added (GstElement *decodebin, GstPad *pad, gpointer data);

    static void cb_unknown_type (GstElement *decodebin, GstPad *pad, GstCaps *caps, gpointer data);

    static void cb_no_more_pads (GstElement * decodebin, gpointer data);

    void saveState();

    void resumeState();

public Q_SLOTS:

    void setState(State);

Q_SIGNALS:

    void currentSourceChanged(const MediaSource &newSource);

    void stateChanged(Phonon::State newstate, Phonon::State oldstate);

    void tick(qint64 time);

    void metaDataChanged(QMultiMap<QString, QString>);

    void seekableChanged(bool);

    void hasVideoChanged(bool);

    void finished();

    void prefinishMarkReached(qint32);

    void aboutToFinish();

    void totalTimeChanged(qint64 length);

    void bufferStatus(int percentFilled);

    QMultiMap<QString, QString> metaData();

    void setMetaData(QMultiMap<QString, QString> newData);

    // AddonInterface:

    void titleChanged(int);

    void availableTitlesChanged(int);

    // Not implemented

    void chapterChanged(int);

    void availableChaptersChanged(int);

    void angleChanged(int);

    void availableAnglesChanged(int);

    void availableSubtitlesChanged();

    void availableAudioChannelsChanged();

protected:

    void beginLoad();

    void loadingComplete();

    void newPadAvailable (GstPad *pad);

    void changeState(State);

    void setError(const QString &errorString, Phonon::ErrorType error = NormalError);

    /*

     * @param encodedUrl percent-encoded QString for source compat reasons.  Should change to QUrl

     */

    bool createPipefromURL(const QUrl &url);

    bool createPipefromStream(const MediaSource &);

private Q_SLOTS:

    void noMorePadsAvailable();    

    void getStreamInfo();

    void emitTick();

    void beginPlay();

    void setVideoCaps(GstCaps *caps);

    void notifyStateChange(Phonon::State newstate, Phonon::State oldstate);

protected:

    GstElement *audioElement()

    {

        Q_ASSERT(m_audioPipe);

        return m_audioPipe;

    }

    GstElement *videoElement()

    {

        Q_ASSERT(m_videoPipe);

        return m_videoPipe;

    }

private:

    // GStreamer specific :

    void createPipeline();

    bool addToPipeline(GstElement *elem);

    void setTotalTime(qint64 newTime);

    void getStreamsInfo();

    bool updateTotalTime();

    void updateSeekable();

    qint64 getPipelinePos() const;

    int _iface_availableTitles() const;

    int _iface_currentTitle() const;

    void _iface_setCurrentTitle(int title);

    bool m_resumeState;

    State m_oldState;

    quint64 m_oldPos;

    State m_state;

    State m_pendingState;

    QTimer *m_tickTimer;

    qint32 m_tickInterval;

    MediaSource m_source;

    MediaSource m_nextSource;

    qint32 m_prefinishMark;

    qint32 m_transitionTime;

    qint64 m_posAtSeek;

    bool m_prefinishMarkReachedNotEmitted;

    bool m_aboutToFinishEmitted;

    bool m_loading;

    gulong m_capsHandler;

    GstElement *m_datasource;

    GstElement *m_decodebin;

    GstElement *m_audioPipe;

    GstElement *m_videoPipe;

    qint64 m_totalTime;

    int m_bufferPercent;

    bool m_hasVideo;

    bool m_videoStreamFound;

    bool m_hasAudio;

    bool m_seekable;

    bool m_atEndOfStream;

    bool m_atStartOfStream;

    Phonon::ErrorType m_error;

    QString m_errorString;

    GstElement *m_pipeline;

    GstElement *m_audioGraph;

    GstElement *m_videoGraph;

    int m_previousTickTime;

    bool m_resetNeeded;

    QStringList m_missingCodecs;

    QMultiMap<QString, QString> m_metaData;

    bool m_autoplayTitles;

    int m_availableTitles;

    int m_currentTitle;

};

}

} //namespace Phonon::Gstreamer

QT_END_NAMESPACE

#endif // Phonon_GSTREAMER_MEDIAOBJECT_H