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#ifndef QGSTREAMERCAPTURESESSION_H

#define QGSTREAMERCAPTURESESSION_H

#include <qmediarecordercontrol.h>

#include <qmediarecorder.h>

#include <QtCore/qurl.h>

#include <gst/gst.h>

#include "qgstreamerbushelper.h"

QT_USE_NAMESPACE

class QGstreamerMessage;

class QGstreamerBusHelper;

class QGstreamerAudioEncode;

class QGstreamerVideoEncode;

class QGstreamerRecorderControl;

class QGstreamerMediaContainerControl;

class QGstreamerElementFactory

{

public:

    virtual GstElement *buildElement() = 0;

    virtual void prepareWinId() {}

};

class QGstreamerVideoInput : public QGstreamerElementFactory

{

public:

    virtual QList<qreal> supportedFrameRates(const QSize &frameSize = QSize()) const = 0;

    virtual QList<QSize> supportedResolutions(qreal frameRate = -1) const = 0;

};

class QGstreamerCaptureSession : public QObject, public QGstreamerSyncEventFilter

{

    Q_OBJECT

    Q_PROPERTY(qint64 duration READ duration NOTIFY durationChanged)

    Q_ENUMS(State)

    Q_ENUMS(CaptureMode)

public:

    enum CaptureMode { Audio = 1, Video = 2, AudioAndVideo = Audio | Video };

    enum State { StoppedState, PreviewState, PausedState, RecordingState };

    QGstreamerCaptureSession(CaptureMode captureMode, QObject *parent);

    ~QGstreamerCaptureSession();

    CaptureMode captureMode() const { return m_captureMode; }

    QUrl outputLocation() const;

    bool setOutputLocation(const QUrl& sink);

    QGstreamerAudioEncode *audioEncodeControl() const { return m_audioEncodeControl; }

    QGstreamerVideoEncode *videoEncodeControl() const { return m_videoEncodeControl; }

    QGstreamerRecorderControl *recorderControl() const { return m_recorderControl; }

    QGstreamerMediaContainerControl *mediaContainerControl() const { return m_mediaContainerControl; }

    QGstreamerElementFactory *audioInput() const { return m_audioInputFactory; }

    void setAudioInput(QGstreamerElementFactory *audioInput);

    QGstreamerElementFactory *audioPreview() const { return m_audioPreviewFactory; }

    void setAudioPreview(QGstreamerElementFactory *audioPreview);

    QGstreamerVideoInput *videoInput() const { return m_videoInputFactory; }

    void setVideoInput(QGstreamerVideoInput *videoInput);

    QGstreamerElementFactory *videoPreview() const { return m_videoPreviewFactory; }

    void setVideoPreview(QGstreamerElementFactory *videoPreview);

    State state() const;

    qint64 duration() const;

    bool processSyncMessage(const QGstreamerMessage &message);

signals:

    void stateChanged(QGstreamerCaptureSession::State state);

    void durationChanged(qint64 duration);

    void error(int error, const QString &errorString);

public slots:

    void setState(QGstreamerCaptureSession::State);

    void setCaptureDevice(const QString &deviceName);

    void dumpGraph(const QString &fileName);

    void setMetaData(const QMap<QByteArray, QVariant>&);

private slots:

    void busMessage(const QGstreamerMessage &message);

private:

    enum PipelineMode { EmptyPipeline, PreviewPipeline, RecordingPipeline, PreviewAndRecordingPipeline };

    GstElement *buildEncodeBin();

    GstElement *buildAudioSrc();

    GstElement *buildAudioPreview();

    GstElement *buildVideoSrc();

    GstElement *buildVideoPreview();

    void waitForStopped();

    bool rebuildGraph(QGstreamerCaptureSession::PipelineMode newMode);

    QUrl m_sink;

    QString m_captureDevice;

    State m_state;

    State m_pendingState;

    bool m_waitingForEos;

    PipelineMode m_pipelineMode;

    QGstreamerCaptureSession::CaptureMode m_captureMode;

    QMap<QByteArray, QVariant> m_metaData;

    QGstreamerElementFactory *m_audioInputFactory;

    QGstreamerElementFactory *m_audioPreviewFactory;

    QGstreamerVideoInput *m_videoInputFactory;

    QGstreamerElementFactory *m_videoPreviewFactory;

    QGstreamerAudioEncode *m_audioEncodeControl;

    QGstreamerVideoEncode *m_videoEncodeControl;

    QGstreamerRecorderControl *m_recorderControl;

    QGstreamerMediaContainerControl *m_mediaContainerControl;

    QGstreamerBusHelper *m_busHelper;

    GstBus* m_bus;

    GstElement *m_pipeline;

    GstElement *m_audioSrc;

    GstElement *m_audioTee;

    GstElement *m_audioPreviewQueue;

    GstElement *m_audioPreview;

    GstElement *m_videoSrc;

    GstElement *m_videoTee;

    GstElement *m_videoPreviewQueue;

    GstElement *m_videoPreview;

    GstElement *m_imageCaptureBin;

    GstElement *m_encodeBin;

public:

    bool m_passImage;

    bool m_passPrerollImage;

    QString m_imageFileName;

};

#endif // QGSTREAMERCAPTURESESSION_H