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#ifndef VIDEOSURFACEGSTSINK_H

#define VIDEOSURFACEGSTSINK_H

#include <gst/video/gstvideosink.h>

#include <QtCore/qlist.h>

#include <QtCore/qmutex.h>

#include <QtCore/qqueue.h>

#include <QtCore/qpointer.h>

#include <QtCore/qwaitcondition.h>

#include <QtMultimedia/qvideosurfaceformat.h>

#include <QtMultimedia/qvideoframe.h>

#include <QtMultimedia/qabstractvideobuffer.h>

QT_BEGIN_NAMESPACE

class QAbstractVideoSurface;

QT_END_NAMESPACE

class QGstXvImageBuffer;

class QGstXvImageBufferPool;

class QVideoSurfaceGstDelegate : public QObject

{

    Q_OBJECT

public:

    QVideoSurfaceGstDelegate(QAbstractVideoSurface *surface);

    QList<QVideoFrame::PixelFormat> supportedPixelFormats(

            QAbstractVideoBuffer::HandleType handleType = QAbstractVideoBuffer::NoHandle) const;

    QVideoSurfaceFormat surfaceFormat() const;

    bool start(const QVideoSurfaceFormat &format, int bytesPerLine);

    void stop();

    bool isActive();

    GstFlowReturn render(GstBuffer *buffer);

private slots:

    void queuedStart();

    void queuedStop();

    void queuedRender();

    void supportedFormatsChanged();

private:

    QPointer<QAbstractVideoSurface> m_surface;

    QList<QVideoFrame::PixelFormat> m_supportedPixelFormats;

    QMutex m_mutex;

    QWaitCondition m_setupCondition;

    QWaitCondition m_renderCondition;

    QVideoSurfaceFormat m_format;

    QVideoFrame m_frame;

    GstFlowReturn m_renderReturn;

    int m_bytesPerLine;

    bool m_started;

};

class QVideoSurfaceGstSink

{

public:

    GstVideoSink parent;

    static QVideoSurfaceGstSink *createSink(QAbstractVideoSurface *surface);

    static QVideoSurfaceFormat formatForCaps(GstCaps *caps, int *bytesPerLine = 0);

private:

    static GType get_type();

    static void class_init(gpointer g_class, gpointer class_data);

    static void base_init(gpointer g_class);

    static void instance_init(GTypeInstance *instance, gpointer g_class);

    static void finalize(GObject *object);

    static GstStateChangeReturn change_state(GstElement *element, GstStateChange transition);

    static GstCaps *get_caps(GstBaseSink *sink);

    static gboolean set_caps(GstBaseSink *sink, GstCaps *caps);

    static GstFlowReturn buffer_alloc(

            GstBaseSink *sink, guint64 offset, guint size, GstCaps *caps, GstBuffer **buffer);

    static gboolean start(GstBaseSink *sink);

    static gboolean stop(GstBaseSink *sink);

    static gboolean unlock(GstBaseSink *sink);

    static gboolean event(GstBaseSink *sink, GstEvent *event);

    static GstFlowReturn preroll(GstBaseSink *sink, GstBuffer *buffer);

    static GstFlowReturn render(GstBaseSink *sink, GstBuffer *buffer);

private:

    QVideoSurfaceGstDelegate *delegate;

    QGstXvImageBufferPool *pool;

    GstCaps *lastRequestedCaps;

    GstCaps *lastBufferCaps;

    QVideoSurfaceFormat *lastSurfaceFormat;

};

class QVideoSurfaceGstSinkClass

{

public:

    GstVideoSinkClass parent_class;

};

#endif