Added support for XvImage shm based video frames to gstreamer backend.

Gstreamer backend will use XvShmPutImage without copying frames data
if possible with overlay video output, and provide XvImage based
video frames to renderer video output surface.

1 files changed, 131 insertions, 0 deletions

diff --git a/src/plugins/mediaservices/gstreamer/qgstxvimagebuffer.h b/src/plugins/mediaservices/gstreamer/qgstxvimagebuffer.h
new file mode 100644
index 0000000..beeb01f
--- /dev/null
+++ b/src/plugins/mediaservices/gstreamer/qgstxvimagebuffer.h
@@ -0,0 +1,131 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#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>
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+
+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;
+};
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+
+#endif