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#ifndef QGSTREAMERMEDIAPLAYER_P_H
#define QGSTREAMERMEDIAPLAYER_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include <QtCore/qstack.h>
#include <private/qplatformmediaplayer_p.h>
#include <private/qtmultimediaglobal_p.h>
#include <qurl.h>
#include <private/qgst_p.h>
#include <private/qgstpipeline_p.h>

#include <QtCore/qtimer.h>

QT_BEGIN_NAMESPACE

class QNetworkAccessManager;
class QGstreamerMessage;
class QGstAppSrc;
class QGstreamerAudioOutput;
class QGstreamerVideoOutput;

class Q_MULTIMEDIA_EXPORT QGstreamerMediaPlayer
    : public QObject,
      public QPlatformMediaPlayer,
      public QGstreamerBusMessageFilter
{
    Q_OBJECT

public:
    QGstreamerMediaPlayer(QMediaPlayer *parent = 0);
    ~QGstreamerMediaPlayer();

    qint64 position() const override;
    qint64 duration() const override;

    float bufferProgress() const override;

    bool isAudioAvailable() const override;
    bool isVideoAvailable() const override;

    bool isSeekable() const override;
    QMediaTimeRange availablePlaybackRanges() const override;

    qreal playbackRate() const override;
    void setPlaybackRate(qreal rate) override;

    QUrl media() const override;
    const QIODevice *mediaStream() const override;
    void setMedia(const QUrl&, QIODevice *) override;

    bool streamPlaybackSupported() const override { return true; }

    void setAudioOutput(QPlatformAudioOutput *output) override;

    QMediaMetaData metaData() const override;

    void setVideoSink(QVideoSink *sink) override;

    int trackCount(TrackType) override;
    QMediaMetaData trackMetaData(TrackType /*type*/, int /*streamNumber*/) override;
    int activeTrack(TrackType) override;
    void setActiveTrack(TrackType, int /*streamNumber*/) override;

    void setPosition(qint64 pos) override;

    void play() override;
    void pause() override;
    void stop() override;

    bool processBusMessage(const QGstreamerMessage& message) override;
public Q_SLOTS:
    void updatePosition() { positionChanged(position()); }

private:
    friend class QGstreamerStreamsControl;
    void decoderPadAdded(const QGstElement &src, const QGstPad &pad);
    void decoderPadRemoved(const QGstElement &src, const QGstPad &pad);
    static void uridecodebinElementAddedCallback(GstElement *uridecodebin, GstElement *child, QGstreamerMediaPlayer *that);
    void setSeekable(bool seekable);
    void parseStreamsAndMetadata();
    void removeOutput(TrackType t);
    void removeAllOutputs();

    void stopOrEOS(bool eos);

    QMediaMetaData m_metaData;
    QList<QGstPad> m_streams[3];

    int m_bufferProgress = -1;
    QUrl m_url;
    QIODevice *m_stream = nullptr;

    bool prerolling = false;
    double m_playbackRate = 1.;
    bool m_seekable = false;
    qint64 m_duration = 0;
    QTimer positionUpdateTimer;

    QGstAppSrc *m_appSrc = nullptr;

    GType decodebinType;
    QGstStructure topology;

    // Gst elements
    QGstPipeline playerPipeline;
    QGstElement src;
    QGstElement decoder;
    QGstElement inputSelector[3];
    bool selectorIsConnected[3] = { false, false, false };

    QGstreamerAudioOutput *gstAudioOutput = nullptr;
    QGstreamerVideoOutput *gstVideoOutput = nullptr;

    //    QGstElement streamSynchronizer;

    QHash<QByteArray, QGstPad> decoderOutputMap;
};

QT_END_NAMESPACE

#endif