adding zero-copy-QSGVideoNode for imx6

On imx6 there is a platform-specific API to implement
memory-mapping from gstreamer-buffer to opengl-texture.

This plugin uses this API to avoid CPU-based-memory-copy.

This allows fluid video-playback up to 1080p with very little CPU load.
Before even 720p used one cpu-core completely and wasn't fluid.

Change-Id: I0c33eb5d475393a65459291ce9290fa0753de4a5
Reviewed-by: Andy Nichols <andy.nichols@digia.com>

1 files changed, 80 insertions, 0 deletions

diff --git a/src/plugins/videonode/imx6/qsgvivantevideomaterial.h b/src/plugins/videonode/imx6/qsgvivantevideomaterial.h
new file mode 100644
index 000000000..9d792b788
--- /dev/null
+++ b/src/plugins/videonode/imx6/qsgvivantevideomaterial.h
@@ -0,0 +1,80 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Pelagicore AG
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** 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, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QSGVIDEOMATERIAL_VIVMAP_H
+#define QSGVIDEOMATERIAL_VIVMAP_H
+
+#include <QList>
+#include <QPair>
+
+#include <QSGMaterial>
+#include <QVideoFrame>
+#include <QMutex>
+
+
+class QSGVivanteVideoMaterial : public QSGMaterial
+{
+public:
+    QSGVivanteVideoMaterial();
+    ~QSGVivanteVideoMaterial();
+
+    virtual QSGMaterialType *type() const;
+    virtual QSGMaterialShader *createShader() const;
+    virtual int compare(const QSGMaterial *other) const;
+    void updateBlending();
+    void setCurrentFrame(const QVideoFrame &frame);
+
+    void bind();
+    GLuint vivanteMapping(QVideoFrame texIdVideoFramePair);
+
+    void setOpacity(float o) { mOpacity = o; }
+
+private:
+    qreal mOpacity;
+
+    QMap<const uchar*, GLuint> mBitsToTextureMap;
+    QVideoFrame mCurrentFrame, mNextFrame;
+    GLuint mCurrentTexture;
+
+    QMutex mFrameMutex;
+};
+
+#endif // QSGVIDEOMATERIAL_VIVMAP_H