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    41 

    42 #ifndef VIDEOSURFACEGSTSINK_H

    43 #define VIDEOSURFACEGSTSINK_H

    44 

    45 #include <gst/video/gstvideosink.h>

    46 

    47 #include <QtCore/qlist.h>

    48 #include <QtCore/qmutex.h>

    49 #include <QtCore/qqueue.h>

    50 #include <QtCore/qpointer.h>

    51 #include <QtCore/qwaitcondition.h>

    52 #include <QtMultimedia/qvideosurfaceformat.h>

    53 #include <QtMultimedia/qvideoframe.h>

    54 #include <QtMultimedia/qabstractvideobuffer.h>

    55 

    56 QT_BEGIN_NAMESPACE

    57 class QAbstractVideoSurface;

    58 QT_END_NAMESPACE

    59 

    60 class QGstXvImageBuffer;

    61 class QGstXvImageBufferPool;

    62 

    63 class QVideoSurfaceGstDelegate : public QObject

    64 {

    65     Q_OBJECT

    66 public:

    67     QVideoSurfaceGstDelegate(QAbstractVideoSurface *surface);

    68 

    69     QList<QVideoFrame::PixelFormat> supportedPixelFormats(

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

    71 

    72     QVideoSurfaceFormat surfaceFormat() const;

    73 

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

    75     void stop();

    76 

    77     bool isActive();

    78 

    79     GstFlowReturn render(GstBuffer *buffer);

    80 

    81 private slots:

    82     void queuedStart();

    83     void queuedStop();

    84     void queuedRender();

    85 

    86     void supportedFormatsChanged();

    87 

    88 private:

    89     QPointer<QAbstractVideoSurface> m_surface;

    90     QList<QVideoFrame::PixelFormat> m_supportedPixelFormats;

    91     QMutex m_mutex;

    92     QWaitCondition m_setupCondition;

    93     QWaitCondition m_renderCondition;

    94     QVideoSurfaceFormat m_format;

    95     QVideoFrame m_frame;

    96     GstFlowReturn m_renderReturn;

    97     int m_bytesPerLine;

    98     bool m_started;

    99 };

   100 

   101 class QVideoSurfaceGstSink

   102 {

   103 public:

   104     GstVideoSink parent;

   105 

   106     static QVideoSurfaceGstSink *createSink(QAbstractVideoSurface *surface);

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

   108 

   109 private:

   110     static GType get_type();

   111     static void class_init(gpointer g_class, gpointer class_data);

   112     static void base_init(gpointer g_class);

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

   114 

   115     static void finalize(GObject *object);

   116 

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

   118 

   119     static GstCaps *get_caps(GstBaseSink *sink);

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

   121 

   122     static GstFlowReturn buffer_alloc(

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

   124 

   125     static gboolean start(GstBaseSink *sink);

   126     static gboolean stop(GstBaseSink *sink);

   127 

   128     static gboolean unlock(GstBaseSink *sink);

   129 

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

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

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

   133 

   134 private:

   135     QVideoSurfaceGstDelegate *delegate;

   136     QGstXvImageBufferPool *pool;

   137     GstCaps *lastRequestedCaps;

   138     GstCaps *lastBufferCaps;

   139     QVideoSurfaceFormat *lastSurfaceFormat;

   140 };

   141 

   142 

   143 class QVideoSurfaceGstSinkClass

   144 {

   145 public:

   146     GstVideoSinkClass parent_class;

   147 };

   148 

   149 #endif