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#ifndef QGSTXVIMAGEBUFFER_H
#define QGSTXVIMAGEBUFFER_H

#include <QtMultimedia/qabstractvideobuffer.h>
#include <QtMultimedia/qvideosurfaceformat.h>
#include <QtCore/qmutex.h>
#include <QtCore/qwaitcondition.h>
#include <QtCore/qqueue.h>

#include <X11/Xlib.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <X11/extensions/XShm.h>
#include <X11/Xlib.h>
#include <X11/extensions/Xv.h>
#include <X11/extensions/Xvlib.h>


#include <gst/gst.h>
class QGstXvImageBufferPool;

struct QGstXvImageBuffer {
    GstBuffer buffer;
    QGstXvImageBufferPool *pool;
    XvImage *xvImage;
    XShmSegmentInfo shmInfo;
    bool markedForDeletion;

    static GType get_type(void);
    static void class_init(gpointer g_class, gpointer class_data);
    static void buffer_init(QGstXvImageBuffer *xvimage, gpointer g_class);
    static void buffer_finalize(QGstXvImageBuffer * xvimage);
    static GstBufferClass *parent_class;
};

const QAbstractVideoBuffer::HandleType XvHandleType = QAbstractVideoBuffer::HandleType(4);

Q_DECLARE_METATYPE(XvImage*)


class QGstXvImageBufferPool : public QObject {
Q_OBJECT
friend class QGstXvImageBuffer;
public:
    QGstXvImageBufferPool(QObject *parent = 0);
    virtual ~QGstXvImageBufferPool();

    bool isFormatSupported(const QVideoSurfaceFormat &format);

    QGstXvImageBuffer *takeBuffer(const QVideoSurfaceFormat &format, GstCaps *caps);
    void clear();

private slots:
    void queuedAlloc();
    void queuedDestroy();

    void doClear();

    void recycleBuffer(QGstXvImageBuffer *);
    void destroyBuffer(QGstXvImageBuffer *);

private:
    struct XvShmImage {
        XvImage *xvImage;
        XShmSegmentInfo shmInfo;
    };

    QMutex m_poolMutex;
    QMutex m_allocMutex;
    QWaitCondition m_allocWaitCondition;
    QMutex m_destroyMutex;
    QVideoSurfaceFormat m_format;
    GstCaps *m_caps;
    QList<QGstXvImageBuffer*> m_pool;
    QList<QGstXvImageBuffer*> m_allBuffers;
    QList<XvShmImage> m_imagesToDestroy;
};

#endif
