Changed QVideoSurfaceGstSink to take pools from plugins

Change-Id: Iec743efc52513e2000276b9a18d1d9639c270699
Reviewed-by: Dmytro Poplavskiy <dmytro.poplavskiy@nokia.com>

src/multimedia/gsttools_headers/qgstbufferpoolinterface_p.h

@@ -1,6 +1,6 @@
 /****************************************************************************
 **
-** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
 ** All rights reserved.
 ** Contact: Nokia Corporation (qt-info@nokia.com)
 **
@@ -39,8 +39,8 @@
 **
 ****************************************************************************/
 
-#ifndef QGSTBUFFERPOOL_P_H
-#define QGSTBUFFERPOOL_P_H
+#ifndef QGSTBUFFERPOOLINTERFACE_P_H
+#define QGSTBUFFERPOOLINTERFACE_P_H
 
 //
 //  W A R N I N G
@@ -55,16 +55,21 @@
 
 #include <qabstractvideobuffer.h>
 #include <qvideosurfaceformat.h>
+#include <QtCore/qobject.h>
+#include <QtCore/qplugin.h>
+#include <QtCore/qfactoryinterface.h>
 
 #include <gst/gst.h>
 
+const QLatin1String QGstBufferPoolPluginKey("bufferpool");
+
 /*!
     Abstract interface for video buffers allocation.
 */
-class QAbstractGstBufferPool
+class QGstBufferPoolInterface : public QFactoryInterface
 {
 public:
-    virtual ~QAbstractGstBufferPool() {}
+    virtual ~QGstBufferPoolInterface() {}
 
     virtual bool isFormatSupported(const QVideoSurfaceFormat &format) const = 0;
 
@@ -83,4 +88,34 @@ public:
     virtual QAbstractVideoBuffer *prepareVideoBuffer(GstBuffer *buffer, int bytesPerLine) = 0;
 };
 
+#define QGstBufferPoolInterface_iid "com.nokia.Qt.QGstBufferPoolInterface"
+Q_DECLARE_INTERFACE(QGstBufferPoolInterface, QGstBufferPoolInterface_iid)
+
+class QGstBufferPoolPlugin : public QObject, public QGstBufferPoolInterface
+{
+    Q_OBJECT
+    Q_INTERFACES(QGstBufferPoolInterface:QFactoryInterface)
+public:
+    explicit QGstBufferPoolPlugin(QObject *parent = 0);
+    virtual ~QGstBufferPoolPlugin() {}
+
+    virtual bool isFormatSupported(const QVideoSurfaceFormat &format) const = 0;
+
+    virtual GType bufferType() const = 0;
+    virtual GstBuffer *takeBuffer(const QVideoSurfaceFormat &format, GstCaps *caps) = 0;
+    virtual void clear() = 0;
+
+    virtual QAbstractVideoBuffer::HandleType handleType() const = 0;
+
+    /*!
+      Build an QAbstractVideoBuffer instance from compatible (mathcing gst buffer type)
+      GstBuffer.
+
+      This method is called from gstreamer video sink thread.
+     */
+    virtual QAbstractVideoBuffer *prepareVideoBuffer(GstBuffer *buffer, int bytesPerLine) = 0;
+
+    virtual QStringList keys() const = 0;
+};
+
 #endif

src/multimedia/gsttools_headers/qgstxvimagebuffer_p.h

@@ -71,7 +71,7 @@
 
 
 #include <gst/gst.h>
-#include "qabstractgstbufferpool_p.h"
+#include "qgstbufferpoolinterface_p.h"
 
 class QGstXvImageBufferPool;
 
@@ -91,7 +91,7 @@ struct QGstXvImageBuffer {
 
 Q_DECLARE_METATYPE(XvImage*)
 
-class QGstXvImageBufferPool : public QObject, public QAbstractGstBufferPool {
+class QGstXvImageBufferPool : public QObject, public QGstBufferPoolInterface {
 Q_OBJECT
 friend class QGstXvImageBuffer;
 public:

src/multimedia/gsttools_headers/qvideosurfacegstsink_p.h

@@ -64,7 +64,7 @@
 #include <qvideoframe.h>
 #include <qabstractvideobuffer.h>
 
-#include "qabstractgstbufferpool_p.h"
+#include "qgstbufferpoolinterface_p.h"
 
 QT_BEGIN_NAMESPACE
 class QAbstractVideoSurface;
@@ -92,7 +92,7 @@ public:
 
     bool isActive();
 
-    QAbstractGstBufferPool *pool() { return m_pool; }
+    QGstBufferPoolInterface *pool() { return m_pool; }
     QMutex *poolMutex() { return &m_poolMutex; }
 
     GstFlowReturn render(GstBuffer *buffer);
@@ -109,8 +109,8 @@ private:
     QList<QVideoFrame::PixelFormat> m_supportedPixelFormats;
     //pixel formats of buffers pool native type
     QList<QVideoFrame::PixelFormat> m_supportedPoolPixelFormats;
-    QAbstractGstBufferPool *m_pool;
-    QList<QAbstractGstBufferPool *> m_pools;
+    QGstBufferPoolInterface *m_pool;
+    QList<QGstBufferPoolInterface *> m_pools;
     QMutex m_poolMutex;
     QMutex m_mutex;
     QWaitCondition m_setupCondition;