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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 <qvideosurfaceformat.h>

    53 #include <qvideoframe.h>

    54 #include <qabstractvideobuffer.h>

    55 

    56 QT_BEGIN_NAMESPACE

    57 class QAbstractVideoSurface;

    58 QT_END_NAMESPACE

    59 

    60 #if defined(Q_WS_X11) && !defined(QT_NO_XVIDEO)

    61 class QGstXvImageBuffer;

    62 class QGstXvImageBufferPool;

    63 #endif

    64 

    65 class QVideoSurfaceGstDelegate : public QObject

    66 {

    67     Q_OBJECT

    68 public:

    69     QVideoSurfaceGstDelegate(QAbstractVideoSurface *surface);

    70 

    71     QList<QVideoFrame::PixelFormat> supportedPixelFormats(

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

    73 

    74     QVideoSurfaceFormat surfaceFormat() const;

    75 

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

    77     void stop();

    78 

    79     bool isActive();

    80 

    81     GstFlowReturn render(GstBuffer *buffer);

    82 

    83 private slots:

    84     void queuedStart();

    85     void queuedStop();

    86     void queuedRender();

    87 

    88     void supportedFormatsChanged();

    89 

    90 private:

    91     QPointer<QAbstractVideoSurface> m_surface;

    92     QList<QVideoFrame::PixelFormat> m_supportedPixelFormats;

    93     QList<QVideoFrame::PixelFormat> m_supportedXVideoPixelFormats;

    94     QMutex m_mutex;

    95     QWaitCondition m_setupCondition;

    96     QWaitCondition m_renderCondition;

    97     QVideoSurfaceFormat m_format;

    98     QVideoFrame m_frame;

    99     GstFlowReturn m_renderReturn;

   100     int m_bytesPerLine;

   101     bool m_started;

   102 };

   103 

   104 class QVideoSurfaceGstSink

   105 {

   106 public:

   107     GstVideoSink parent;

   108 

   109     static QVideoSurfaceGstSink *createSink(QAbstractVideoSurface *surface);

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

   111 

   112 private:

   113     static GType get_type();

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

   115     static void base_init(gpointer g_class);

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

   117 

   118     static void finalize(GObject *object);

   119 

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

   121 

   122     static GstCaps *get_caps(GstBaseSink *sink);

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

   124 

   125     static GstFlowReturn buffer_alloc(

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

   127 

   128     static gboolean start(GstBaseSink *sink);

   129     static gboolean stop(GstBaseSink *sink);

   130 

   131     static gboolean unlock(GstBaseSink *sink);

   132 

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

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

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

   136 

   137 private:

   138     QVideoSurfaceGstDelegate *delegate;

   139 

   140 #if defined(Q_WS_X11) && !defined(QT_NO_XVIDEO)

   141     QGstXvImageBufferPool *pool;

   142 #endif

   143 

   144     GstCaps *lastRequestedCaps;

   145     GstCaps *lastBufferCaps;

   146     QVideoSurfaceFormat *lastSurfaceFormat;

   147 };

   148 

   149 

   150 class QVideoSurfaceGstSinkClass

   151 {

   152 public:

   153     GstVideoSinkClass parent_class;

   154 };

   155 

   156 #endif